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WO2020246072A1 - Electricity storage device, electricity storage device assembly, electric vehicle, and method for manufacturing electricity storage device - Google Patents

Electricity storage device, electricity storage device assembly, electric vehicle, and method for manufacturing electricity storage device Download PDF

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Publication number
WO2020246072A1
WO2020246072A1 PCT/JP2020/006068 JP2020006068W WO2020246072A1 WO 2020246072 A1 WO2020246072 A1 WO 2020246072A1 JP 2020006068 W JP2020006068 W JP 2020006068W WO 2020246072 A1 WO2020246072 A1 WO 2020246072A1
Authority
WO
WIPO (PCT)
Prior art keywords
power storage
storage device
exterior member
valve
peripheral edge
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2020/006068
Other languages
French (fr)
Japanese (ja)
Inventor
福田　淳
望月　洋一
高萩　敦子
美帆 佐々木
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dai Nippon Printing Co Ltd
Original Assignee
Dai Nippon Printing Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dai Nippon Printing Co Ltd filed Critical Dai Nippon Printing Co Ltd
Priority to JP2021524663A priority Critical patent/JP7533454B2/en
Publication of WO2020246072A1 publication Critical patent/WO2020246072A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/04—Hybrid capacitors
    • H01G11/06—Hybrid capacitors with one of the electrodes allowing ions to be reversibly doped thereinto, e.g. lithium ion capacitors [LIC]
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/10—Multiple hybrid or EDL capacitors, e.g. arrays or modules
    • H01G11/12—Stacked hybrid or EDL capacitors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/14—Arrangements or processes for adjusting or protecting hybrid or EDL capacitors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/14—Arrangements or processes for adjusting or protecting hybrid or EDL capacitors
    • H01G11/18—Arrangements or processes for adjusting or protecting hybrid or EDL capacitors against thermal overloads, e.g. heating, cooling or ventilating
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/74—Terminals, e.g. extensions of current collectors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/78—Cases; Housings; Encapsulations; Mountings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/78—Cases; Housings; Encapsulations; Mountings
    • H01G11/80—Gaskets; Sealings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/78—Cases; Housings; Encapsulations; Mountings
    • H01G11/82—Fixing or assembling a capacitive element in a housing, e.g. mounting electrodes, current collectors or terminals in containers or encapsulations
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/84—Processes for the manufacture of hybrid or EDL capacitors, or components thereof
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/84—Processes for the manufacture of hybrid or EDL capacitors, or components thereof
    • H01G11/86—Processes for the manufacture of hybrid or EDL capacitors, or components thereof specially adapted for electrodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G2/00—Details of capacitors not covered by a single one of groups H01G4/00-H01G11/00
    • H01G2/08—Cooling arrangements; Heating arrangements; Ventilating arrangements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
    • H01G9/004—Details
    • H01G9/08—Housing; Encapsulation
    • H01G9/12—Vents or other means allowing expansion
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
    • H01M10/625—Vehicles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present invention relates to a power storage device mounted on an electric vehicle and a method for manufacturing the same.
  • the present invention also relates to an assembly of power storage devices using a power storage device and an electric vehicle.
  • the electric vehicle includes an electric vehicle (EV), a hybrid vehicle (HEV), a plug-in hybrid vehicle (PHEV), and the like. Electric vehicles are powered only by motors, and hybrid vehicles and plug-in hybrid vehicles are powered by motors and engines.
  • EV electric vehicle
  • HEV hybrid vehicle
  • PHEV plug-in hybrid vehicle
  • Patent Document 1 A conventional power storage device mounted on an electric vehicle is disclosed in Patent Document 1.
  • This power storage device consists of a thin secondary battery having a rectangular shape in a plan view in which the battery element is covered with an exterior member.
  • the positive electrode plate and the negative electrode plate are arranged to face each other via a separator, and an electrolyte is arranged between the positive electrode plate and the negative electrode plate.
  • the exterior member two laminates having metal foils are heat-bonded by a thermosetting resin layer to enclose the battery element. At this time, the terminals connected to the positive electrode plate and the negative electrode plate respectively protrude from the exterior member.
  • the power storage devices are stacked in the thickness direction and arranged side by side in the lateral direction of the rectangular shape in a plan view to form an assembled battery composed of a plurality of power storage devices.
  • the assembled batteries are stacked in the thickness direction of the power storage device, and the composite assembled battery composed of a plurality of assembled batteries is installed under the floor of the electric vehicle.
  • the weight of the upper power storage device is added to the lower power storage device because they are stacked in the height direction when mounted on a vehicle.
  • the exterior member made of the laminated body is deformed, and the exterior member may be damaged when the load is increased due to vibration of the vehicle or the like. Therefore, there is a problem that the reliability of the power storage device and the electric vehicle is lowered.
  • the present invention relates to a power storage device in which a power storage element is enclosed in an exterior member of a laminate having a heat-adhesive resin layer and mounted as a drive source in an electric vehicle, wherein the exterior member faces the outer member. It has a peripheral seal portion in which heat-adhesive resin layers are heat-bonded to each other, and a storage portion formed at a predetermined depth with respect to the peripheral seal portion and accommodating the power storage element, and the depth of the storage portion.
  • the first direction orthogonal to the direction and the depth direction of the storage portion is arranged in the front-rear direction or the left-right direction of the electric vehicle, and the depth direction of the storage portion and the second direction orthogonal to the first direction are electric.
  • Arranged in the height direction of the car It is characterized in that it is attached to the exterior member at least partially at the peripheral seal portion, and is further provided with a valve device that enables communication between the storage portion and the external space.
  • the valve device includes a valve mechanism that reduces the pressure inside the exterior member when the pressure inside the exterior member rises due to the gas generated inside the exterior member. It has a first portion formed in the above and a second portion formed inside a ventilation path for guiding the gas generated in the storage portion to the valve mechanism. The inner end of the second portion protrudes from the inner edge of the peripheral edge seal portion in the direction toward the accommodating portion.
  • the storage portion is arranged inside the inner edge of the peripheral seal portion, and the inner end of the second portion is inside the outer edge of the storage portion. It is characterized by being located.
  • the outer shape of the first portion protrudes from the outer shape of the second portion in the depth direction of the storage portion. It is characterized by that.
  • the present invention is characterized in that, in the power storage device having the above configuration, the first portion is located outside the outer edge of the peripheral edge seal portion.
  • the present invention is characterized in that, in the power storage device having the above configuration, the first portion has a larger cross-sectional area in a cross section orthogonal to the extending direction of the air passage than the second portion.
  • the valve device includes a valve mechanism that reduces the pressure inside the exterior member when the pressure inside the exterior member rises due to the gas generated inside the exterior member. It has a first portion formed in the above and a second portion formed inside a ventilation path for guiding the gas generated in the storage portion to the valve mechanism.
  • the first portion is located outside the outer edge of the peripheral edge seal portion, and at least a part of the second portion is sandwiched between the thermosetting resin layers in the peripheral edge seal portion.
  • the length of the first portion is longer than the length of the second portion, and a step is formed at the boundary between the first portion and the second portion. It is said.
  • the present invention is characterized in that, in the power storage device having the above configuration, the length of the second portion in the first direction is longer than the length of the second portion in the depth direction of the storage portion.
  • the valve device includes a valve mechanism that reduces the pressure inside the exterior member when the pressure inside the exterior member rises due to the gas generated inside the exterior member. It has a first portion formed in the above and a second portion formed inside a ventilation path for guiding the gas generated in the storage portion to the valve mechanism.
  • the first portion is located outside the outer edge of the peripheral edge seal portion, and at least a part of the second portion is sandwiched between the thermosetting resin layers in the peripheral edge seal portion.
  • the length of the second portion in the first direction is longer than the length of the second portion in the depth direction of the storage portion.
  • the valve device includes a valve mechanism that reduces the pressure inside the exterior member when the pressure inside the exterior member rises due to the gas generated inside the exterior member. It has a first portion formed in the above and a second portion formed inside a ventilation path for guiding the gas generated in the storage portion to the valve mechanism.
  • the first portion is located outside the outer edge of the peripheral edge seal portion, and at least a part of the second portion is sandwiched between the thermosetting resin layers in the peripheral edge seal portion.
  • the second portion is characterized by having a wing-shaped extension portion formed thinner as it approaches the end portion in the first direction.
  • the valve device includes a valve mechanism that reduces the pressure inside the exterior member when the pressure inside the exterior member rises due to the gas generated inside the exterior member. It has a first portion formed in the above and a second portion formed inside a ventilation path for guiding the gas generated in the storage portion to the valve mechanism.
  • the first portion is located outside the outer edge of the peripheral edge seal portion, and at least a part of the second portion is sandwiched between the thermosetting resin layers in the peripheral edge seal portion.
  • the outer surface of the second portion is characterized in that at least one convex portion extending in the circumferential direction is formed.
  • the present invention is characterized in that, in the power storage device having the above configuration, the cross-sectional shape of the ventilation path is circular.
  • the present invention is characterized in that, in the power storage device having the above configuration, the length of the ventilation path in the first direction is longer than the length of the ventilation path in the depth direction of the storage portion.
  • the present invention is characterized in that, in the power storage device having the above configuration, in the second part, the corners on the outer peripheral side of the end portion opposite to the first part side are rounded.
  • the present invention is characterized in that, in the power storage device having the above configuration, the second portion has a pillar formed in the air passage.
  • the present invention is characterized in that, in the power storage device having the above configuration, the outer surface of the second portion is satin finished.
  • the present invention is characterized in that, in the power storage device having the above configuration, the second portion has a polygonal outer shape of a cross section orthogonal to the central axis of the air passage, and the corners of the polygon are rounded. There is.
  • the present invention is characterized in that, in the power storage device having the above configuration, a flat surface is formed on at least a part of the outer surface of at least one of the first portion and the second portion.
  • the first part and the second part are made of different materials, and the melting point of the material of the first part is higher than the melting point of the material of the second part. It is characterized by.
  • the valve device includes a valve mechanism that reduces the pressure inside the exterior member when the pressure inside the exterior member rises due to the gas generated inside the exterior member. It has a first portion formed in the above and a second portion formed inside a ventilation path for guiding the gas generated in the storage portion to the valve mechanism.
  • the inner end of the valve device is located outside the outer edge of the storage portion, and when viewed along the extending direction of the air passage, the outer shape of the first portion is the same as the outer shape of the second portion. The feature is that it protrudes in the depth direction of the storage part.
  • the valve device includes a valve mechanism that reduces the pressure inside the exterior member when the pressure inside the exterior member rises due to the gas generated inside the exterior member. It has a first portion formed in the above and a second portion formed inside a ventilation path for guiding the gas generated in the storage portion to the valve mechanism.
  • the inner end of the valve device is located outside the outer edge of the accommodating portion, and the first portion has a larger cross-sectional area than the second portion in a cross section orthogonal to the extending direction of the air passage. It is said.
  • the outer shape of the first portion protrudes from the outer shape of the second portion in the depth direction of the storage portion. It is characterized by that.
  • the present invention is characterized in that, in the power storage device having the above configuration, the inner end of the valve device reaches at least the inner end edge of the peripheral seal portion.
  • the present invention is characterized in that, in the power storage device having the above configuration, the first portion is located outside the outer edge of the peripheral edge seal portion.
  • the present invention is characterized in that, in the power storage device having the above configuration, the inner end of the valve device protrudes from the inner edge of the peripheral edge seal portion toward the storage portion.
  • the inner edge of the peripheral edge seal portion extends in the vicinity of the valve device and intersects with the valve device, and the inner edge of the peripheral edge seal portion extends.
  • a second line and a third line adjacent to each side of the first line along the direction are included, and the first line is located outside the second line and the third line, respectively. There is.
  • valve device is attached to the first portion located outside the outer edge of the peripheral edge seal portion and the thermosetting resin layer in the peripheral seal portion.
  • the peripheral seal portion includes the second portion sandwiched, and is characterized in that the outer surface of the sandwiched portion sandwiching the second portion by the thermosetting resin layer is formed with irregularities.
  • the unevenness is formed by a concave portion extending in the circumferential direction of the valve device on the outer surface of the sandwiched portion, and the depth of the concave portion is 0. It is characterized in that it is 05 mm to 0.1 mm.
  • the position of the concave portion provided on one surface of the peripheral seal portion and the position of the concave portion provided on the other surface are the depths of the storage portion. It is characterized by not overlapping in the direction.
  • the present invention is characterized in that, in the power storage device having the above configuration, the unevenness is composed of a satin finish formed on the outer surface of the sandwiched portion, and the surface roughness Ra of the satin finish is 1 ⁇ m to 20 ⁇ m. There is.
  • the unevenness provided on one surface of the peripheral edge seal portion is the first concave portion and the first concave portion protruding outward from the first concave portion in the depth direction of the storage portion.
  • the unevenness provided on the other surface of the peripheral edge seal portion includes a second concave portion and a second convex portion that protrudes outward from the second concave portion in the depth direction of the storage portion.
  • the bottom of the first recess and the bottom of the second recess are rounded.
  • the valve device is held in a housing in which a ventilation path for discharging gas generated inside the exterior member to the outside of the exterior member is formed and in the housing.
  • it has a valve mechanism that allows the gas to pass to the outside of the exterior member through the ventilation path when the internal pressure of the exterior member rises due to the gas generated inside the exterior member.
  • a parallel first plane and a second plane arranged outside the exterior member are provided on the outer peripheral surface of the housing.
  • the housing has a mounting portion fixed to the exterior member, a valve function portion arranged outside the exterior member to hold the valve mechanism, and the mounting portion. It is characterized by having a parallel portion arranged between the valve function portion and the valve function portion and provided with the first plane and the second plane.
  • the housing has a mounting portion fixed to the exterior member, a valve function portion arranged outside the exterior member to hold the valve mechanism, and the valve function. It is characterized by having a parallel portion which is arranged outside the portion and is provided with the first plane and the second plane.
  • the housing has a mounting portion fixed to the exterior member and is arranged outside the exterior member to hold the valve mechanism, and the first plane and the first plane. It is characterized by having a valve function portion provided with two flat surfaces.
  • the housing has a mounting portion fixed to the exterior member to hold the valve mechanism, and the first plane and the second plane are outside the exterior member. It is characterized in that it is arranged on the housing.
  • the present invention is characterized in that, in the power storage device having the above configuration, the cross-sectional shape perpendicular to the axial direction of the mounting portion is non-circular.
  • the mounting portion has a first wing-shaped portion formed thinner from the central portion toward the first direction along the peripheral seal portion, and a first wing-shaped portion opposite to the first direction. It is characterized by having a second wing-shaped portion formed thinner toward two directions.
  • the present invention is characterized in that, in the power storage device having the above configuration, the first plane and the second plane are parallel or perpendicular to the first direction and the second direction.
  • the valve device is used when the pressure inside the exterior member increases due to the attachment portion attached to the exterior member and the gas generated inside the exterior member.
  • a valve functioning portion configured to reduce the pressure, and a gas provided between the mounting portion and the valve functioning portion and passing through the mounting portion are configured to pass into the valve functioning portion. It is characterized in that the valve function portion is located outside the outer periphery of the exterior member.
  • the present invention is characterized in that, in the power storage device having the above configuration, the length of the gas passing portion is 10 mm or more.
  • the present invention is characterized in that, in the power storage device having the above configuration, the gas passing portion has flexibility that allows bending and stretching.
  • the present invention is characterized in that, in the power storage device having the above configuration, the gas passing portion holds a desiccant inside.
  • the present invention is measured in a power storage device having the above configuration in a 25 ° C. environment in accordance with the method specified in the "vacuum spraying method (spray method)" in the “helium leakage test method” of JIS Z2331: 2006.
  • the amount of helium leak from the secondary side to the primary side of the valve device is 5.0 ⁇ 10 -11 Pa ⁇ m 3 / sec or more and 5.0 ⁇ 10 -6 Pa ⁇ m 3 / sec or less. It is a feature.
  • the exterior member has a substantially rectangular shape when viewed from the depth direction of the storage portion, and the valve device is provided on any of three sides excluding the bottom of one end in the second direction. It is characterized by being able to be attached.
  • the exterior member is formed of the first packaging material and the second packaging material, and the laminate includes at least a base material layer, a barrier layer and the thermosetting resin layer.
  • the first packaging material and the second packaging material are provided in this order, and the thermosetting resin layers are arranged so as to face each other.
  • the present invention is characterized in that, in the power storage device having the above configuration, the length of the storage portion in the first direction is larger than the length in the second direction.
  • the present invention is characterized in that, in the power storage device having the above configuration, the length of the storage portion in the first direction is 2 to 30 times the length in the second direction.
  • the present invention is characterized in that, in the power storage device having the above configuration, the peripheral seal portion extending in the first direction is overlapped on the peripheral wall of the storage portion by bending.
  • the present invention is characterized in that, in the power storage device having the above configuration, the flow direction of the exterior member is orthogonal to the first direction.
  • the power storage element has a first electrode terminal and a second electrode terminal, and the first electrode terminal and the second electrode terminal extend in the second direction. It is characterized by protruding from.
  • the present invention is characterized in that, in the power storage device having the above configuration, the first electrode terminal and the second electrode terminal protrude from the peripheral seal portion facing the first direction, respectively.
  • a plurality of power storage devices having the above configurations are arranged side by side in the depth direction of the storage portion and stored in an outer container, and a plurality of the power storage devices are arranged side by side in an aggregate of power storage devices mounted on an electric vehicle. It is characterized in that the length in the provided direction is larger than the length in the second direction.
  • the present invention is characterized in that, in the power storage device assembly having the above configuration, the mounting member on which the outer container is mounted is provided, and the mounting member described above has a temperature adjusting function.
  • the present invention is characterized in that, in the power storage device assembly having the above configuration, the mounting member on which the outer container is mounted is provided, and the mounting member described above is formed of a liquid absorbent material.
  • the electric vehicle of the present invention includes a power storage device assembly having the above configuration, a drive motor to which power is supplied from the power storage device assembly, and wheels driven by the drive motor, and the power storage device assembly is a vehicle body. It is characterized in that it is arranged in one step in the height direction on the bottom.
  • the present invention is a step of preparing a first packaging material and an exterior member having a second packaging material of a laminate having a heat-adhesive resin layer in a method of manufacturing a power storage device mounted as a drive source in an electric vehicle.
  • the power storage element is housed in a storage portion formed in the first packaging material at a predetermined depth, and the peripheral portions of the first packaging material and the second packaging material are joined by a peripheral edge sealing portion to be formed by the exterior member.
  • a valve device including a packaging step and enabling communication between the storage portion and the external space is sandwiched between the first packaging material and the second packaging material at least partially in the peripheral sealing portion.
  • the first direction attached to the exterior member and orthogonal to the depth direction of the storage portion and the depth direction of the storage portion is arranged in the front-rear direction or the left-right direction of the electric vehicle, and the depth direction of the storage portion and The second direction orthogonal to the first direction is arranged in the height direction of the electric vehicle, and the length of the storage portion in the first direction is larger than the length in the second direction.
  • the valve device in the method for manufacturing a power storage device having the above configuration, includes a first portion in which a valve mechanism for discharging gas generated in the storage portion to the external space is formed inside, and the storage portion. It has a second portion formed inside with a ventilation path for guiding the generated gas to the valve mechanism, and the inner end of the second portion is in the direction from the inner edge of the peripheral edge seal portion toward the storage portion. It is characterized by protruding.
  • the valve device in the method for manufacturing a power storage device having the above configuration, includes a first portion in which a valve mechanism for discharging gas generated in the storage portion to the external space is formed inside, and the storage portion. It has a second portion formed inside with a ventilation path for guiding the generated gas to the valve mechanism.
  • the first portion is located outside the outer edge of the peripheral edge seal portion, and at least a part of the second portion is sandwiched between the thermosetting resin layers in the peripheral edge seal portion.
  • the length of the first portion In the depth direction of the storage portion, the length of the first portion is longer than the length of the second portion, and a step is formed at the boundary between the first portion and the second portion. It is said.
  • the valve device in the method for manufacturing a power storage device having the above configuration, includes a first portion in which a valve mechanism for discharging gas generated in the storage portion to the external space is formed inside, and the storage portion. It has a second portion formed inside with a ventilation path for guiding the generated gas to the valve mechanism.
  • the first portion is located outside the outer edge of the peripheral edge seal portion, and at least a part of the second portion is sandwiched between the thermosetting resin layers in the peripheral edge seal portion.
  • the length of the second portion in the first direction is longer than the length of the second portion in the depth direction of the storage portion.
  • the valve device in the method for manufacturing a power storage device having the above configuration, includes a first portion in which a valve mechanism for discharging gas generated in the storage portion to the external space is formed inside, and the storage portion. It has a second portion formed inside with a ventilation path for guiding the generated gas to the valve mechanism.
  • the first portion is located outside the outer edge of the peripheral edge seal portion, and at least a part of the second portion is sandwiched between the thermosetting resin layers in the peripheral edge seal portion.
  • the second portion is characterized by having a wing-shaped extension portion formed thinner as it approaches the end portion in the first direction.
  • the valve device in the method for manufacturing a power storage device having the above configuration, includes a first portion in which a valve mechanism for discharging gas generated in the storage portion to the external space is formed inside, and the storage portion. It has a second portion formed inside with a ventilation path for guiding the generated gas to the valve mechanism.
  • the first portion is located outside the outer edge of the peripheral edge seal portion, and at least a part of the second portion is sandwiched between the thermosetting resin layers in the peripheral edge seal portion.
  • the outer surface of the second portion is characterized in that at least one convex portion extending in the circumferential direction is formed.
  • the valve device in the method for manufacturing a power storage device having the above configuration, includes a first portion in which a valve mechanism for discharging gas generated in the storage portion to the external space is formed inside, and the storage portion. It has a second portion formed inside with a ventilation path for guiding the generated gas to the valve mechanism, and the inner end of the valve device is located outside the outer edge of the storage portion, and the ventilation path.
  • the outer shape of the first portion protrudes from the outer shape of the second portion in the depth direction of the storage portion when viewed along the extending direction of the first portion.
  • the valve device in the method for manufacturing a power storage device having the above configuration, includes a first portion in which a valve mechanism for discharging gas generated in the storage portion to the external space is formed inside, and the storage portion. It has a second portion formed inside with a ventilation path for guiding the generated gas to the valve mechanism, and the inner end of the valve device is located outside the outer edge of the storage portion, and the first The portion is characterized in that the cross-sectional area in the cross section orthogonal to the extending direction of the air passage is larger than that of the second portion.
  • the present invention comprises a valve mechanism for discharging the gas generated in the storage portion to the external space and a housing in which the valve mechanism is formed inside.
  • the inner end of the valve device reaches the inner end edge of the peripheral edge seal portion on the outer side of the outer end edge of the storage portion, and the inner end portion of the housing is in a closed state of the valve mechanism. It is characterized in that an opening communicating with the storage portion is formed.
  • the valve device in the method for manufacturing a power storage device having the above configuration, has a first portion located outside the outer edge of the peripheral edge seal portion and the thermal adhesiveness at the peripheral edge seal portion.
  • the peripheral seal portion includes a second portion sandwiched between the resin layers, and is characterized in that the outer surface of the sandwiched portion sandwiching the second portion by the thermosetting resin layer is formed with irregularities. ..
  • the valve device in the method for manufacturing a power storage device having the above configuration, includes a housing in which a ventilation path for discharging gas generated inside the exterior member to the outside of the exterior member is formed, and the housing.
  • a valve mechanism that allows the gas to pass to the outside of the exterior member through the ventilation path when the internal pressure of the exterior member rises due to the gas generated inside the exterior member. It is characterized in that parallel first planes and second planes arranged outside the exterior member are provided on the outer peripheral surface of the housing.
  • the pressure inside the exterior member is increased due to the attachment portion attached to the exterior member and the gas generated inside the exterior member.
  • a valve device main body configured to reduce the pressure when the pressure rises, and a gas provided between the mounting portion and the valve device main body and passing through the mounting portion are passed into the valve device main body. It is characterized in that it has a gas passing portion configured as described above, and the valve device main body is located outside the outer periphery of the exterior member.
  • the present invention is characterized in that, in the method for manufacturing a power storage device having the above configuration, the length of the storage portion in the first direction is 2 to 30 times the length in the second direction.
  • the step of packaging with the exterior member is to provide a peripheral seal portion for sealing the exterior member by heat adhesion of the heat-adhesive resin layer to a peripheral portion of the exterior member. It is characterized in that the peripheral seal portion extending in the second direction is bent and overlapped on the peripheral wall of the storage portion.
  • the present invention is characterized in that, in the method for manufacturing a power storage device having the above configuration, the first direction is orthogonal to the flow direction of the exterior member.
  • the power storage device is arranged in the front-rear direction or the left-right direction of the electric vehicle in the first direction orthogonal to the depth direction and the depth direction of the storage portion of the exterior member. Further, the depth direction of the storage portion and the second direction orthogonal to the first direction are arranged in the height direction of the electric vehicle.
  • FIG. 1st Embodiment of this invention Top view showing the electric vehicle of the first embodiment of the present invention
  • Sectional drawing which shows the packaging material of the exterior member of the power storage device of the electric vehicle of 1st Embodiment of this invention.
  • FIG. 5 of another example Front view showing the valve device of the power storage device of the electric vehicle of the first embodiment of the present invention.
  • EE sectional view of FIG. FF sectional view of FIG. It is the DD cross-sectional view of FIG. 5, and is the figure for demonstrating the mounting state of the valve device.
  • Enlarged view of part H in FIG. Enlarged view of part H in FIG. 5 of another example
  • a flowchart showing a manufacturing procedure of a power storage device for an electric vehicle according to a first embodiment of the present invention. The figure explaining the operation which arranges the valve device of the power storage device of the electric vehicle of 1st Embodiment of this invention.
  • FIG. 1 Side sectional view showing the power storage device of the electric vehicle of the second embodiment of the present invention.
  • Top view showing an electric vehicle according to a fourth embodiment of the present invention A cross-sectional view showing a valve device of a power storage device of an electric vehicle according to a fifth embodiment of the present invention.
  • a cross-sectional view showing a valve device of a power storage device of an electric vehicle according to a sixth embodiment of the present invention Front view showing a valve device of a power storage device of an electric vehicle according to a seventh embodiment of the present invention.
  • Front view showing a valve device of a power storage device of an electric vehicle according to a ninth embodiment of the present invention Front view showing a valve device of a power storage device of an electric vehicle according to a ninth embodiment of the present invention.
  • Front view showing a valve device of a power storage device of an electric vehicle according to a tenth embodiment of the present invention A cross-sectional view showing a valve device of a power storage device of an electric vehicle according to a tenth embodiment of the present invention.
  • a cross-sectional view showing a valve device of a power storage device of an electric vehicle according to a twelfth embodiment of the present invention A cross-sectional view showing a valve device of a power storage device of an electric vehicle according to a thirteenth embodiment of the present invention.
  • a cross-sectional view showing a valve device of a power storage device of an electric vehicle according to a fourteenth embodiment of the present invention Front view showing the packaging material of the power storage device of the electric vehicle of the fifteenth embodiment of the present invention. Top view showing a part of the packaging material of the power storage device of the electric vehicle of the fifteenth embodiment of the present invention. Front view showing the power storage device of the electric vehicle of the 16th embodiment of the present invention. Enlarged view of part J in FIG. 41 Enlarged view of part J in FIG. 41 of another example Front view showing the power storage device of the electric vehicle of the 17th embodiment of the present invention. It is a cross-sectional view of GG of FIG. 44, and is the figure for demonstrating the mounting state of the valve device.
  • FIG. 17 Schematic configuration diagram of the heat sealing device used in the manufacturing process of the power storage device of the electric vehicle according to the 17th embodiment of the present invention.
  • FIG. 51 Front view showing the valve device of the power storage device of the electric vehicle of the 20th embodiment of the present invention.
  • MM cross-sectional view of FIG. 55 NN sectional view of FIG. 55 The figure explaining the work of attaching the valve device of the power storage device of the electric vehicle of the 20th embodiment of this invention.
  • FIG. 20th embodiment of this invention The figure explaining the work of attaching the valve device of the power storage device of the electric vehicle of the 20th embodiment of this invention.
  • Bottom view showing the valve device of the power storage device of the electric vehicle of the 22nd embodiment of the present invention.
  • the electric vehicle 1 includes a drive motor 3 as a power source for driving the wheels 2.
  • a power storage device pack 5 (collection of power storage devices) is installed at the bottom of the vehicle body of the electric vehicle 1 under the floor as a drive source for supplying electric power to the drive motor 3.
  • FIG. 3 shows a perspective view of the power storage device pack 5.
  • a plurality of power storage devices 10 are arranged side by side and covered with an outer container 6.
  • a plurality of power storage device modules in which a plurality of power storage devices 10 are packaged may be arranged side by side to form the power storage device pack 5.
  • Each power storage device 10 is provided with a positive electrode terminal 12 and a negative electrode terminal 13 (see FIG. 4) made of metal.
  • the electrode terminals 12 and the electrode terminals 13 are electrically connected in a predetermined order, and a pair of connection terminals (not shown) protrude from the outer container 6.
  • the metal materials constituting the electrode terminals 12 and 13 are, for example, aluminum, nickel, copper and the like.
  • the electrode terminal 12 connected to the positive electrode is usually made of aluminum or the like
  • the electrode terminal 13 connected to the negative electrode is usually made of copper, nickel or the like.
  • the outer container 6 is formed of a laminated body in which a thermosetting resin layer, a metal foil, and a base material layer are laminated. Each power storage device 10 is sealed by heat-bonding the thermosetting resin layer of the outer container 6.
  • the outer container 6 may be formed of an injection-molded product or a metal container.
  • the power storage device 10 is composed of a secondary battery in which a power storage element 11 is enclosed in an exterior member 20.
  • Examples of the power storage device 10 include a lithium ion battery, a lithium ion polymer battery, a lithium ion all-solid-state battery, a lead storage battery, a nickel hydrogen storage battery, a nickel cadmium storage battery, a nickel iron storage battery, a nickel zinc storage battery, a silver zinc oxide storage battery, a metal air battery, and more.
  • a valent cation battery, an all-solid-state battery, or the like is used.
  • gas may be generated in the exterior member 20.
  • the power storage device 10 is an all-solid-state battery, hydrogen sulfide gas can be generated by, for example, a sulfide-based solid electrolyte. Therefore, as will be described in detail later, the power storage device 10 is provided with a valve device 50 for exhausting gas.
  • the power storage element 11 is formed by arranging a positive electrode plate and a negative electrode plate (both not shown) facing each other via an insulator separator (not shown). Electrode terminals 12 and 13 are connected to the positive electrode plate and the negative electrode plate, respectively.
  • the power storage element 11 can be formed by winding a long separator, a positive electrode plate, and a negative electrode plate.
  • the power storage element 11 may be formed by stacking a sheet-shaped positive electrode plate, a separator, a negative electrode plate, and a separator in a plurality of stages in this order. Further, the power storage element 11 may be formed by laminating a long separator, a positive electrode plate and a negative electrode plate by folding.
  • An electrolyte is arranged between the positive electrode plate and the negative electrode plate.
  • the electrolyte is composed of an electrolytic solution and is filled inside the exterior member 20.
  • a solid electrolyte or a gel electrolyte may be used as the electrolyte.
  • the exterior member 20 includes a packaging material 15 (first packaging material) and a packaging material 25 (second packaging material) made of a laminate having a thermosetting resin layer 38 (see FIG. 7) on the inner surface.
  • FIG. 7 is a cross-sectional view showing a laminated structure of the packaging material 15.
  • the packaging material 25 has the same laminated structure as the packaging material 15.
  • the packaging material 15 and the packaging material 25 are formed by laminating a base material layer 34, a barrier layer 36, and a thermosetting resin layer 38 in this order.
  • the thickness of the packaging material 15 and the packaging material 25 is preferably 50 ⁇ m or more in consideration of strength, and 400 ⁇ m or less in consideration of weight reduction of the power storage device 10.
  • the thickness of the packaging material 15 and the packaging material 25 is more preferably about 50 ⁇ m to 200 ⁇ m, and further preferably about 90 ⁇ m to 160 ⁇ m.
  • the base material layer 34 is a layer that functions as a base material for the packaging materials 15 and 25, and is a layer that forms the outermost layer side of the exterior member 20.
  • the base material layer 34 has insulating properties and is formed of polyamide, polyester, epoxy, acrylic, fluororesin, polyurethane, silicon resin, phenol, polyetherimide, polyimide, polycarbonate, a mixture thereof, a copolymer, or the like.
  • the base material layer 34 may be formed of these resin films, or may be formed by applying these resins.
  • the resin film forming the base material layer 34 may be an unstretched film or a stretched film.
  • the stretched film include a uniaxially stretched film and a biaxially stretched film, and a biaxially stretched film is preferable.
  • the stretching method for forming the biaxially stretched film include a sequential biaxial stretching method, an inflation method, and a simultaneous biaxial stretching method.
  • the base material layer 34 may be a single layer or may be composed of a laminate of two or more layers.
  • the base material layer 34 may be a laminate in which resin films are laminated with an adhesive or the like, or a laminate of resin films in which the resin is co-extruded to form two or more layers. You may.
  • a polyurethane-based adhesive, an acrylic-based adhesive, or the like can be used as the adhesive for laminating the resin film.
  • the laminated body of the resin film obtained by co-extruding the resin into two or more layers may be used as the base material layer 34 without being stretched, or may be uniaxially or biaxially stretched to form the base material layer 34.
  • a plurality of resin films made of different materials may be laminated to form the base material layer 34.
  • the base material layer 34 formed by a laminate of two or more layers of resin film, a laminate of a polyester film and a nylon film, a laminate of two or more layers of nylon film, and a laminate of two or more layers of polyester film.
  • the body etc. can be mentioned.
  • a laminate of a stretched nylon film and a stretched polyester film, a laminate of two or more layers of stretched nylon film, and a laminate of two or more layers of stretched polyester film are preferable.
  • the base material layer 34 is two layers, a laminate of polyester film and polyester film, a laminate of polyamide film and polyamide film, or a laminate of polyester film and polyamide film is preferable. More specifically, a laminate of a polyethylene terephthalate film and a polyethylene terephthalate film, a laminate of a nylon film and a nylon film, and a laminate of a polyethylene terephthalate film and a nylon film are more preferable. Further, the polyester resin is preferably located in the outermost layer of the base material layer 34.
  • the thickness of the base material layer 34 is formed to be, for example, about 3 to 75 ⁇ m. More preferably, it is about 3 to 50 ⁇ m, and further preferably 10 to 35 ⁇ m.
  • polyethylene terephthalate (thickness 12 ⁇ m) and nylon (thickness 15 ⁇ m) are laminated with an adhesive (thickness 4 ⁇ m) to form a base material layer 34.
  • the barrier layer 36 is formed of metal foil to prevent the intrusion of water vapor, oxygen, light, etc.
  • metal forming the barrier layer 36 aluminum, aluminum alloy, stainless steel, titanium and the like can be used.
  • the thickness of the barrier layer 36 is formed to be, for example, 10 to 300 ⁇ m. More preferably, it is about 10 to 100 ⁇ m, and further preferably about 20 to 80 ⁇ m.
  • the barrier layer 36 is annealed aluminum (JIS H4160: 1994 A8021HO, JIS H4160: 1994 A8079HO, JIS H4000: 2014). It is more preferable to form it with a soft aluminum foil such as A8021P-O, JIS H4000: 2014 A8079P-O).
  • the barrier layer 36 is formed of a soft aluminum foil having a thickness of 40 ⁇ m.
  • the barrier layer 36 may be formed of a metal vapor deposition film, an inorganic oxide vapor deposition film, a carbon-containing inorganic oxide vapor deposition film, and a resin film provided with these vapor deposition films.
  • the base material layer 34 and the barrier layer 36 are adhered with an adhesive (not shown) such as polyurethane or acrylic.
  • the adhesive may be a two-component curable adhesive or a one-component curable adhesive.
  • the adhesive mechanism of the adhesive is not particularly limited, and may be any of a chemical reaction type, a solvent volatilization type, a heat melting type, a thermocompression bonding type, and the like.
  • the thickness of the adhesive is, for example, about 1 to 10 ⁇ m, preferably about 2 to 5 ⁇ m.
  • thermosetting resin layer 38 forms the innermost layer of the exterior member 20, and the exterior member 20 is sealed by heat-bonding the thermosetting resin layers 38 facing each other at the peripheral edge of the exterior member 20. Further, by covering the barrier layer 36 with a thermosetting resin having a certain film thickness or more, the insulating property between the electrolytic solution and the metal of the barrier layer 36 can be maintained.
  • the heat-adhesive resin layer 38 may be any resin having heat-adhesiveness, and is formed of, for example, a heat-adhesive resin such as polyolefin or acid-modified polyolefin. A plurality of resins of different materials may be laminated to form the thermosetting resin layer 38.
  • polystyrene-propylene terpolymer examples include polyethylene, polypropylene, ethylene-butene-propylene terpolymer and the like.
  • polyethylene examples include low-density polyethylene, medium-density polyethylene, high-density polyethylene, and linear low-density polyethylene.
  • polypropylene examples include crystalline or amorphous polypropylenes such as homopolypropylene, polypropylene block copolymers (eg, propylene and ethylene block copolymers), and polypropylene random copolymers (eg, propylene and ethylene random copolymers).
  • the acid-modified polyolefin is not particularly limited as long as it is an acid-modified polyolefin.
  • Preferred are polyolefins graft-modified with unsaturated carboxylic acids or anhydrides thereof.
  • the thickness of the thermosetting resin layer 38 is formed to be, for example, 10 to 100 ⁇ m. More preferably, it is about 15 to 90 ⁇ m, and further preferably about 30 to 80 ⁇ m.
  • the thermosetting resin layer 38 is formed by extruding onto the barrier layer 36.
  • the acid-modified polypropylene (thickness 40 ⁇ m) and polypropylene (thickness 40 ⁇ m) are extruded in order on the barrier layer 36 to form the thermosetting resin layer 38.
  • the film forming the thermosetting resin layer 38 may be adhered on the barrier layer 36 with an adhesive.
  • the barrier layer 36 and the thermosetting resin layer 38 can be adhered to each other by an adhesive of a resin composition containing an acid-modified polyolefin.
  • the acid-modified polyolefin is not particularly limited, but preferably an unsaturated carboxylic acid or a polyolefin graft-modified with an anhydride thereof.
  • the thickness of the adhesive is, for example, 1 to 50 ⁇ m, preferably about 2 to 40 ⁇ m.
  • the packaging material 25 is formed in the shape of a rectangular sheet.
  • the packaging material 15 has a storage portion 16 and a flange portion 17.
  • the storage portion 16 has a substantially rectangular opening 16a on one surface to store the power storage element 11.
  • the flange portion 17 is formed in an annular shape protruding outward from the peripheral edge of the opening 16a.
  • the valve device 50 is heat-bonded and fixed to the peripheral edge sealing portion 21, and the electrode terminals 12 and 13 are heat-bonded and fixed to the peripheral edge sealing portion 21 via the tab films 12a and 13a.
  • the accommodating portion 16 is formed to a predetermined depth from the inner edge of the peripheral edge sealing portion 21, and is sealed by the peripheral edge sealing portion 21.
  • the packaging material 15 is formed by cold forming a storage portion 16 recessed with respect to the flange portion 17 to a predetermined depth.
  • the storage portion 16 is formed in a substantially rectangular shape extending in one direction in a plane perpendicular to the depth direction.
  • the flange portion 17 is provided in an annular shape along the storage portion 16, and the outer shape of the flange portion 17 is formed into a substantially rectangular shape having substantially the same size as the packaging material 25.
  • the housing portion 16 of the exterior member 20 is formed in a substantially rectangular shape when viewed from the depth direction.
  • the depth of the storage portion 16 is determined according to the thickness of the barrier layer 36 of the packaging material 15 so that cracks and the like do not occur during molding.
  • the depth of the storage portion 16 is formed to be 5 mm to 10 mm with respect to the barrier layer 36 having a thickness of 40 ⁇ m.
  • each corner R in the plane perpendicular to the depth direction of the storage portion 16 is formed to be, for example, about 3 mm, and each corner R in the plane parallel to the depth direction is formed to be, for example, about 1.5 mm.
  • the depth of the storage portion 16 can be formed to, for example, 5 mm to 30 mm.
  • FIG. 8 shows a cross-sectional view taken along the line AA of FIG.
  • the electrode terminals 12 and 13 are sandwiched between the packaging materials 15 and 25 via the tab films 12a and 13a on the peripheral edge sealing portion 21 described later of the exterior member 20.
  • the tab films 12a and 13a are adhesive protective films, and are configured to adhere to both the packaging materials 15 and 25 and the metal electrode terminals 12 and 13.
  • the metal electrode terminals 12 and 13 can be fixed by the packaging materials 15 and 25 via the tab films 12a and 13a.
  • the tab films 12a and 13a preferably include an insulating layer, a heat resistant layer or a heat resistant component and have a short circuit prevention function, particularly when used at a high voltage.
  • FIG. 9 shows a cross-sectional view taken along the line BB of FIG.
  • the storage portion 16 is arranged inside the inner edge P2 of the peripheral edge seal portion 21 and rises from the inner edge P3 of the flange portion 17. Therefore, the storage portion 16 is formed so as to bulge in the Y direction (see FIG. 6) from the peripheral seal portion 21.
  • the inner edge P2 of the peripheral edge seal portion 21 and the inner edge P3 of the flange portion 17 coincide with each other.
  • the shaded area is a portion of the peripheral seal portion 21 that is heat-bonded.
  • FIG. 10 shows a cross-sectional view taken along the line BB of FIG. 5 in the exterior member 20 of another example.
  • the inner edge P2 of the peripheral edge seal portion 21 may be located outside the inner edge P3 of the flange portion 17 (in other words, the outer edge of the storage portion 16).
  • the power storage device 10 is arranged in the depth direction (Y direction) of the storage unit 16 in the front-rear direction of the electric vehicle 1. Further, the longitudinal direction (X direction, first direction) in the plane perpendicular to the depth direction of the storage portion 16 is arranged in the left-right direction of the electric vehicle 1, and the lateral direction (Z direction, second direction) is the electric vehicle. It is arranged in the height direction of 1. That is, the X direction orthogonal to the depth direction of the storage portion 16 is arranged in the left-right direction of the electric vehicle 1, and the depth direction of the storage portion 16 and the Z direction orthogonal to the X direction are arranged in the height direction of the electric vehicle 1. Will be done.
  • FIG. 11 shows a front view of the valve device 50.
  • the valve device 50 communicates with the inside of the exterior member 20 and is configured to release the gas to the outside when the pressure inside the exterior member 20 exceeds a predetermined value due to the gas generated in the exterior member 20. Has been done. That is, the valve device 50 is a degassing valve for adjusting the pressure in the exterior member 20, and is a return valve capable of repeatedly degassing.
  • the valve device 50 is attached to the upper side of the exterior member 20 formed in a substantially rectangular shape when viewed from the depth direction of the accommodating portion 16, and includes a valve function portion 52 and an attachment portion 62. Although the details will be described later, at least a part of the mounting portion 62 is sandwiched and fixed between the packaging materials 15 and 25 (see FIG. 4). When the mounting portion 62 is heat-bonded, the outer peripheral surface of the mounting portion 62 and the thermosetting resin layer 38, which is the innermost layer of the packaging materials 15 and 25, are heat-bonded and joined.
  • valve function portion 52 and the mounting portion 62 are arranged in the Z direction, and the mounting portion 62 is arranged below the valve function portion 52.
  • the mounting portion 62 is connected to the lower end portion (inner end portion) of the valve function portion 52.
  • the outer shapes of the valve function portion 52 and the mounting portion 62 each have a substantially cylindrical shape having a central axis C1 parallel to the Z direction, and are coaxial with each other.
  • the corner R may be formed by chamfering when the housing 51 of the valve device 50 is formed, or the housing 51 may be formed into a shape having the corner R by resin molding.
  • FIG. 12 is a cross-sectional view taken along the line EE of FIG. 11 and shows a cross-sectional view of the valve device 50.
  • the outer shape of the valve function portion 52 and the mounting portion 62 of the valve device 50 is formed to have a circular cross section.
  • the mounting portion 62 has a substantially cylindrical shape as a whole, and a ventilation path 63 is formed inside the mounting portion 62.
  • the vent 63 extends along the Z direction.
  • the air passage 63 has a circular cross section, and the center of the air passage 63 is arranged on the central axis C1.
  • the thickness of the mounting portion 62 in the radial direction centered on the central axis C1 is substantially constant along the circumferential direction.
  • the cross-sectional shape of the ventilation passage 63 may be formed into a polygon.
  • the length L2 of the valve function portion 52 in the depth direction (Y direction) of the storage portion 16 is longer than the length L1 of the mounting portion 62.
  • the length L2 of the valve function portion 52 in the direction (X direction) orthogonal to the depth direction of the storage portion 16 (see FIG. 5) in the plane perpendicular to the central axis C1 is longer than the length L1 of the mounting portion 62. That is, the outer diameter of the valve function portion 52 is longer than the outer diameter of the mounting portion 62, and the cross-sectional area of the valve function portion 52 in the cross section perpendicular to the central axis C1 is larger than the cross-sectional area of the mounting portion 62.
  • the outer shape of the mounting portion 62 is included in the outer shape of the valve function portion 52.
  • the valve function portion 52 protrudes from the outer shape of the mounting portion 62 in each direction including the depth direction of the storage portion 16 (see FIG. 5).
  • a step 51c is formed at the boundary between the valve function portion 52 and the mounting portion 62 (see FIG. 11). Due to this step 51c, the valve device 50 has a shape in which the diameter is discontinuously expanded from the mounting portion 62 toward the valve function portion 52.
  • FIG. 13 is a sectional view taken along the line FF of FIG. 11 and shows a vertical sectional view of the valve device 50.
  • a corner R is formed on the outer peripheral surface of the tip end portion (lower end portion) of the mounting portion 62.
  • a ventilation path 63 extending in the vertical direction (Z direction) is formed inside the mounting portion 62. The ventilation passage 63 guides the gas generated in the exterior member 20 to the valve function portion 52.
  • valve function portion 52 Inside the valve function unit 52, a valve mechanism configured to discharge the gas generated in the exterior member 20 (see FIG. 5) to the outside of the exterior member 20 is provided.
  • the valve function portion 52 includes an O-ring 53, a ball 54, a spring 56, and a membrane 58. That is, the valve function portion 52 is provided with a ball spring type valve mechanism.
  • the valve device 50 of the present embodiment is a return valve that requires a complicated valve mechanism capable of repeatedly degassing, but a simpler valve mechanism capable of degassing only once is sufficient. It may be a selective transmission valve.
  • the valve mechanism provided in the valve function portion 52 is not particularly limited as long as the pressure in the exterior member 20 increased due to the gas can be repeatedly reduced only once or a plurality of times. For example, a poppet type or a duck building is used.
  • a valve mechanism such as a mold, umbrella type, or diaphragm type may be used.
  • the housing 51 of the valve device 50 extends along the central axis C1 and forms the outer shape of the valve function portion 52 and the mounting portion 62.
  • a ventilation passage 63 is formed in the mounting portion 62 by the housing 51, and a space S2 communicating with the ventilation passage 63 is formed in the valve function portion 52.
  • the space S2 penetrates in the Z direction, and an exhaust port 51b opens on the upper surface of the housing 51.
  • the housing 51 has a valve seat 51a facing the space S2.
  • the valve seat 51a is formed on a conical surface whose diameter increases upward.
  • the valve seat 51a supports the ball 54 as a valve body urged by the spring 56.
  • the O-ring 53 is a hollow circular ring, and is formed of, for example, fluororubber.
  • the O-ring 53 eliminates the gap between the ball 54 seated on the valve seat 51a and the valve seat 51a, and assists in improving the airtightness in the closed state.
  • the ball 54 and the spring 56 are made of, for example, stainless steel.
  • the ball 54 may be formed of resin.
  • the membrane 58 is formed of, for example, polytetrafluoroethylene (PTFE) having a pore diameter of about 0.01 to 1 ⁇ m. As a result, the membrane 58 does not leak the electrolytic solution and permeates only the gas (selective permeation). Since PTFE is a soft material, if the strength is insufficient, a membrane 58 reinforced by integrally molding with a mesh such as polypropylene or polyester or a non-woven fabric can be used.
  • PTFE polytetrafluoroethylene
  • the gas induced from the ventilation passage 63 presses the ball 54 in the Z direction (upward).
  • the spring 56 contracts and the valve function portion 52 is opened.
  • the gas in the exterior member 20 passes through the gap formed between the ball 54 and the O-ring 53, permeates the membrane 58, and is discharged to the outside of the exterior member 20 from the exhaust port 51b. ..
  • the spring 56 extends and the force for urging the ball 54 in the Z direction (downward) becomes larger than this. As a result, the closed state of the valve function portion 52 is formed again.
  • FIG. 14 is a cross-sectional view taken along the line DD of FIG. 5 for explaining the mounting state of the valve device 50.
  • FIG. 15 is an enlarged view of the H portion of FIG.
  • the valve function portion 52 of the valve device 50 is located outside the outer edge P1 of the peripheral edge seal portion 21.
  • a part of the attachment portion 62 of the valve device 50 is sandwiched between the thermosetting resin layer 38 of the packaging material 15 and the thermosetting resin layer 38 of the packaging material 25 at the peripheral seal portion 21.
  • the outer peripheral surface of the mounting portion 62 and the thermosetting resin layer 38, which is the innermost layer of the packaging materials 15 and 25, are joined to each other by heat adhesion.
  • FIG. 14 shows the thermosetting resin layer 38 only in the vicinity of the peripheral seal portion 21 for convenience. , It is provided on the entire surface of the packaging materials 15 and 25.
  • the attachment portion 62 is sandwiched between the thermosetting resin layers 38, the valve device 50 is attached to the exterior member 20, and the valve function portion 52 is arranged outside the peripheral edge seal portion 21. If the valve function portion 52 is sandwiched between the thermosetting resin layer 38, the valve mechanism in the valve function portion 52 may be damaged by the heat and pressure applied during the heat bonding of the thermosetting resin layer 38. Therefore, by sandwiching the mounting portion 62 between the thermosetting resin layers 38, a large pressure and heat are not applied to the valve function portion 52 during thermal bonding, and failure of the valve mechanism can be suppressed.
  • the diameter of the cross section of the mounting portion 62 is shorter than the diameter of the cross section of the valve function portion 52. Therefore, the difference between the length L4 on the mounting portion 62 in the Y direction (depth direction of the storage portion 16) of the peripheral edge sealing portion 21 and the length L3 of the portion not sandwiching the mounting portion 62 can be reduced.
  • the outer peripheral surface of the mounting portion 62 and the thermosetting resin layer 38 which is the innermost layer of the packaging materials 15 and 25, are bonded without gaps during thermal bonding. It becomes necessary to increase the pressure of. Therefore, the pressure applied to the peripheral edge of the exterior member 20 for thermal adhesion increases, and the thermosetting resin layer 38 on the mounting portion 62 and the electrode terminals 12 and 13 may become thin. As a result, dielectric breakdown of the power storage device 10 may occur.
  • the mounting portion 62 can be firmly fixed to the exterior member 20 by appropriately heat-bonding the opposing thermosetting resin layers 38 while preventing dielectric breakdown of the power storage device 10.
  • the attachment portion 62 of the valve device 50 is arranged on the peripheral edge seal portion 21.
  • the inner end portion of the valve function portion 52 is not in contact with the outer edge P1 of the peripheral edge seal portion 21, and is arranged at intervals from the outer edge P1 to the outside.
  • the inner end 62a of the mounting portion 62 reaches the inner edge P2 of the peripheral edge sealing portion 21 (corresponding to the inner edge P3 of the flange portion 17), and further protrudes in the direction toward the storage portion 16.
  • an opening communicating with the storage portion 16 is formed at the inner end portion of the housing 51 in the closed state of the valve mechanism.
  • the inner end 62a of the mounting portion 62 is located flush with the inner edge P2 of the peripheral seal portion 21 or outside the inner edge P2, a functional defect of the valve device 50 occurs. That is, the inner end portion of the mounting portion 62 may be deformed due to the heat or pressure applied to the mounting portion 62 when the peripheral edge sealing portion 21 is formed. Further, a part of the melted packaging materials 15 and 25 may enter the ventilation passage 63 of the mounting portion 62 from the inner end 62a side, and the ventilation passage 63 may be clogged. When these problems occur, the valve device 50 does not function normally and fails.
  • the inner end 62a of the mounting portion 62 exists inside the inner edge P2 of the peripheral edge sealing portion 21. Therefore, when the peripheral edge seal portion 21 is formed, the inner end portion of the mounting portion 62 can be protected to prevent scratches, and a failure of the valve device 50 can be suppressed.
  • the inner end 62a of the mounting portion 62 is similarly arranged on the peripheral edge. It exists inside the inner edge P2 of the seal portion 21. As a result, the inner end portion of the mounting portion 62 can be protected to prevent scratches, and failure of the valve device 50 can be suppressed.
  • the inner end 62a of the mounting portion 62 may be arranged between the inner edge P3 of the flange portion 17 and the inner edge P2 of the peripheral edge seal portion 21, but is stored from the inner edge P3 of the flange portion 17. It is more desirable to project in the direction toward the portion 16. As a result, the failure of the valve device 50 can be suppressed more reliably.
  • a corner R (see FIG. 11) is formed on the outer peripheral portion of the inner end portion of the mounting portion 62, and the corner on the outer peripheral side is rounded. As a result, even if the inner end portion of the mounting portion 62 comes into contact with the power storage element 11, the possibility of damaging the power storage element 11 can be reduced. Further, the corners R on the outer peripheral surface of the inner end portion of the mounting portion 62 can prevent the thermosetting resin layers 38 of the packaging materials 15 and 25 from being scratched due to contact with the inner end portion of the mounting portion 62.
  • the corner R at the inner end of the mounting portion 62 may be omitted. Further, a corner R may be provided on the inner peripheral surface of the inner end portion of the mounting portion 62. As a result, it is possible to reduce the possibility that the corner on the inner peripheral side of the mounting portion 62 is scraped and the resin piece falls into the exterior member 20.
  • FIG. 16 shows another mounting example of the valve device 50, and shows an enlarged view of the H portion of FIG.
  • the valve device 50 is attached so that the inner end portion of the valve function portion 52 is in contact with the outer end edge P1 of the peripheral edge seal portion 21.
  • the valve device 50 can be reliably positioned with respect to the peripheral seal portion 21 by using the step 51c between the valve function portion 52 and the mounting portion 62. Therefore, by designing the length of the mounting portion 62 in the Z direction to be longer than the sealing width of the peripheral edge sealing portion 21, the inner end 62a of the mounting portion 62 surely protrudes from the inner edge P2 of the peripheral edge sealing portion 21. Can be made to.
  • the power storage device 10 is arranged in the depth direction (Y direction) of the storage unit 16 in the front-rear direction of the electric vehicle 1. Further, the longitudinal direction (X direction, first direction) in the plane perpendicular to the depth direction of the storage portion 16 is arranged in the left-right direction of the electric vehicle 1, and the lateral direction (Z direction, second direction) is the electric vehicle. It is arranged in the height direction of 1 (see FIGS. 1 to 6).
  • the accommodating portion 16 makes the lengths Ax and Az (see FIG. 4) orthogonal to each other in the plane perpendicular to the depth direction easier than the length Ay (see FIG. 4) in the depth direction. Can be made larger. Therefore, by arranging the depth direction (Y direction) of the storage portion 16 in the front-rear direction of the electric vehicle 1, the plurality of power storage devices 10 can be installed in the electric vehicle 1 without being stacked to supply desired electric power. Can be done. Therefore, it is possible to prevent the exterior member 20 from being damaged by the load when stacked, and it is possible to improve the reliability of the power storage device 10.
  • the packaging material 25 bends due to the load, so that the electrolytic solution is pushed out to the peripheral portion. Therefore, the electrolytic solution between the positive electrode plate and the negative electrode plate in the central portion becomes insufficient, and the energy density of the power storage device 10 decreases. Therefore, the depth direction (Y direction) of the storage portion 16 can be arranged in the front-rear direction to prevent a decrease in the energy density of the power storage device 10 containing the electrolytic solution.
  • the height of the power storage device 10 is reduced to improve the comfort of the electric vehicle 1. be able to.
  • the storage portion 16 extends long in the X direction and the length Ax in the X direction is larger than the length Az in the Z direction, the height can be suppressed and the power storage device 10 having a large capacity can be obtained.
  • the length Ax of the storage portion 16 in the X direction is formed to be 2 to 30 times the length Az in the Z direction. If the length Ax is smaller than twice the length Az, the capacity of the power storage device 10 becomes small. Therefore, the length Ax can be formed to be twice or more the length Az, and the capacity of the power storage device 10 can be increased. Further, if the length Ax exceeds 30 times the length Az, the packaging material 15 cannot be easily molded, so that the yield is lowered. Therefore, the length Ax can be formed to be 30 times or less the length Az, and the yield of the packaging material 15 at the time of molding can be improved.
  • peripheral edge sealing portion 21 extending in the X direction protrudes in the Z direction during thermal bonding as shown by the alternate long and short dash line 21'(see FIG. 6), and the peripheral edge sealing portion 21 at the lower end is bent after thermal bonding to form the storage portion 16. It is stacked on the peripheral wall. As a result, the height of the power storage device 10 can be made smaller.
  • the flow directions (MD) of the packaging materials 15 and 25 made of the laminated body are arranged in the Z direction (orthogonal to the X direction).
  • the laminate is bent parallel to the flow direction, there is a high possibility that cracks in the metal foil and pinholes in the resin film will occur.
  • the flow directions of the packaging materials 15 and 25 are orthogonal to the X direction, it is possible to suppress the occurrence of cracks and pinholes in the exterior member 20 when the peripheral edge seal portion 21 extending in the X direction is bent.
  • the flow direction (MD) of the packaging materials 15 and 25 corresponds to the rolling direction (RD) of the metal foil (aluminum alloy foil, etc.) of the barrier layer 36.
  • the TDs of the packaging materials 15 and 25 correspond to the TDs of the metal foil.
  • the rolling direction (RD) of the metal foil can be determined by the rolling stitches.
  • the sea island structure was confirmed by observing a plurality of cross sections of the heat-adhesive resin layers 38 of the packaging materials 15 and 25 with an electron microscope, and the average diameter of the islands in the direction perpendicular to the thickness direction of the heat-adhesive resin layers 38 was averaged.
  • the direction parallel to the cross section where was the maximum can be determined as MD.
  • the MD of the packaging materials 15 and 25 cannot be specified by the rolled grain of the metal foil, the MD can be specified by this method.
  • the cross section of the heat-adhesive resin layer 38 in the length direction and the direction perpendicular to the cross section in the length direction are changed by 10 degrees from the direction parallel to the cross section in the length direction.
  • the cross-sections (10 cross-sections in total) are observed by electron micrographs to confirm the sea-island structure.
  • the diameter d of the island is measured by the linear distance connecting both ends in the direction perpendicular to the thickness direction of the thermosetting resin layer 38.
  • the average of the diameters d of the top 20 islands from the largest is calculated.
  • the direction parallel to the cross section having the largest average diameter d of the islands is determined as MD.
  • the electrode terminal 12 and the electrode terminal 13 extend in the Z direction and project from the peripheral seal portion 21 facing the X direction, respectively. Therefore, the height of the power storage device 10 can be made lower. Further, when the electrode terminal 12 and the electrode terminal 13 come close to each other, the temperature rise in the vicinity of the electrode terminal 12 and the electrode terminal 13 becomes large, so that the power storage device 10 tends to deteriorate over time. Therefore, by arranging the electrode terminals 12 and the electrode terminals 13 apart from each other in the X direction, it is possible to suppress the aged deterioration of the power storage device 10.
  • the power storage device 10 is manufactured by performing a packaging step of packaging the power storage element 11 with the exterior member 20 after the step of preparing the molded exterior member 20. Further, if necessary, a bending process is provided after the packaging process.
  • the roll-shaped laminate is cut to a predetermined length, and the storage portion 16 is recessed with respect to the flange portion 17 by cold molding to form the packaging material 15.
  • the packaging materials 15 and 25 are formed by arranging the flow direction (MD) of the roll-shaped laminate in the Z direction.
  • the exterior member 20 may be prepared by the molding step, or the molded exterior member 20 may be obtained and the exterior member 20 may be prepared.
  • FIG. 17 is a flowchart showing the packaging process.
  • the packaging process is carried out by a predetermined manufacturing apparatus.
  • the manufacturing apparatus arranges each component in the exterior member 20.
  • the power storage element 11 to which the electrode terminals 12 and 13 with the tab films 12a and 13a are electrically connected by welding is arranged in the storage portion 16 in the packaging material 15.
  • the electrode terminals 12 and 13 with the tab films 12a and 13a are placed on the flange portion 17 of the packaging material 15.
  • the electrode terminals 12 and 13 with the tab films 12a and 13a may be welded to the power storage element 11.
  • the mounting portion 62 of the valve device 50 is placed on the flange portion 17 of the packaging material 15.
  • the packaging material 25 is placed on the packaging material 15.
  • FIG. 18 is a diagram showing an operation of arranging the valve device 50 between the flange portion 17 of the packaging material 15 and the packaging material 25.
  • a step 51c is formed between the valve function portion 52 and the mounting portion 62. Therefore, even if the valve device 50 is pushed too far toward the exterior member 20 when the mounting portion 62 is sandwiched between the packaging materials 15 and 25, the step 51c is caught by the ends of the packaging materials 15 and 25.
  • the step 51c rising from the mounting portion 62 in at least the Y direction functions as a stopper for preventing the valve function portion 52 from entering between the packaging materials 15 and 25.
  • the heat sealing process is performed in step # 12.
  • the peripheral edge of the exterior member 20 is heat-bonded. That is, the manufacturing apparatus sandwiches the peripheral edge of the exterior member 20 with a heat seal bar, and applies pressure and heat to the peripheral edge of the exterior member 20.
  • the thermosetting resin layers 38 facing each other are fused to each other on the peripheral edge of the exterior member 20, and the peripheral edge sealing portion 21 is formed.
  • the valve device 50 is fused and fixed to the peripheral edge sealing portion 21, and the electrode terminals 12 and 13 are also fused and fixed to the peripheral edge sealing portion 21 via the tab films 12a and 13a.
  • the power storage element 11 is sealed inside the exterior member 20.
  • the inside of the exterior member 20 is degassed so that unnecessary gas is not contained inside the exterior member 20. Specifically, the entire circumference is not joined, but a part of the peripheral edge in the unjoined state is left, and the peripheral edge in the unjoined state is degassed. At this time, if the power storage device 10 requires an electrolytic solution, the electrolytic solution is injected from the peripheral edge of the unbonded state. After that, pressure and heat can be applied to the peripheral edge in the unbonded state to complete the peripheral edge sealing portion 21 on the entire circumference.
  • the power storage element 11 is shown in a smaller size than the storage part 16 for convenience in order to explain that the power storage element 11 is housed in the storage part 16 of the exterior member 20 in an easy-to-understand manner. ..
  • the space inside the storage portion 16 is reduced to have substantially the same size as the power storage element 11. Therefore, in the completed state of the power storage device 10, the storage unit 16 is filled with the power storage element 11 with almost no gap.
  • the lower peripheral edge seal portion 21 extending in the X direction perpendicular to the flow direction of the laminated body is bent and overlapped on the peripheral wall of the storage portion 16. As a result, the power storage device 10 is completed.
  • the power storage device pack 5 is formed by arranging a plurality of power storage devices 10 side by side in the Y direction, and is installed in the electric vehicle 1 in one stage in the height direction.
  • a plurality of power storage device packs 5 may be arranged in the X direction or the Y direction and installed in the electric vehicle 1.
  • the length Bz in the Z direction of the power storage device pack 5 is formed to be substantially the same length as the length AZ in the Z direction of the storage portion 16 of the power storage device 10.
  • the length Bx of the power storage device pack 5 in the X direction is formed to have substantially the same length as the length of the power storage device 10 in the X direction. Further, since the power storage devices 10 are arranged side by side in the Y direction, the length By of the power storage device pack 5 in the Y direction is larger than the length Bz in the Z direction.
  • the height of the power storage device pack 5 (length Bz in the Z direction) is formed to be, for example, 100 mm or less.
  • the height of the power storage device pack 5 (length Bz in the Z direction) is formed to be, for example, 150 mm or less.
  • the power storage device 10 is arranged in the depth direction (Y direction) of the storage portion 16 of the exterior member 20 in the front-rear direction of the electric vehicle 1. Further, the X direction (first direction) orthogonal to the depth direction of the storage portion 16 is arranged in the left-right direction of the electric vehicle 1. The Z direction (second direction) orthogonal to the depth direction and the X direction of the storage portion 16 is arranged in the height direction of the electric vehicle 1. That is, the X direction (first direction) and the Z direction (second direction) orthogonal to each other in the plane perpendicular to the depth direction of the storage portion 16 are arranged in the left-right direction and the height direction of the electric vehicle 1, respectively.
  • the depth direction (Y direction) of the storage unit 16 can be arranged in the front-rear direction to prevent a decrease in the energy density of the power storage device 10.
  • valve device 50 is attached to the peripheral seal portion 21 of the exterior member 20, it is possible to accurately control the pressure for degassing.
  • valve device 50 has a valve function portion 52 (first portion) provided with a valve mechanism and a mounting portion 62 (second portion) provided with a ventilation passage 63, and the valve device 50 mounting portion 62 (second portion).
  • the inner end 62a of the portion) projects from the inner edge P2 of the peripheral edge seal portion 21 toward the storage portion 16.
  • the storage portion 16 is arranged inside the inner edge P3 of the peripheral edge seal portion 21, and the inner end 62a of the mounting portion 62 is inside the inner edge P3 (outer edge of the storage portion 16) of the flange portion 17. It may be located in. As a result, the failure of the valve device 50 can be suppressed more reliably.
  • the outer shape of the valve function portion 52 (first portion) having the valve function formed inside is from the outer shape of the mounting portion 62 (second portion) having the ventilation passage 63 formed inside to the depth direction (Y direction) of the storage portion 16. ) Is sticking out.
  • the difference between the length L4 on the mounting portion 62 in the Y direction of the peripheral edge sealing portion 21 (the depth direction of the storage portion 16) and the length L3 of the portion not sandwiching the mounting portion 62 can be reduced. Therefore, the pressure applied to the entire peripheral edge of the exterior member 20 at the time of thermal bonding can be reduced. Therefore, the mounting portion 62 can be firmly fixed to the exterior member 20 by appropriately heat-bonding the opposing thermosetting resin layers 38 while preventing dielectric breakdown of the power storage device 10.
  • valve function portion 52 (first portion) has a larger cross-sectional area than the mounting portion 62 (second portion) in the cross section orthogonal to the extending direction of the air passage 63.
  • the difference between the length L4 on the mounting portion 62 in the Y direction of the peripheral edge sealing portion 21 (the depth direction of the storage portion 16) and the length L3 of the portion not sandwiching the mounting portion 62 can be reduced. Therefore, the pressure applied to the entire peripheral edge of the exterior member 20 at the time of thermal bonding can be reduced. Therefore, the mounting portion 62 can be firmly fixed to the exterior member 20 by appropriately heat-bonding the opposing thermosetting resin layers 38 while preventing dielectric breakdown of the power storage device 10.
  • a step 51c is provided at the boundary between the valve function portion 52 and the mounting portion 62, the step 51c may not be formed.
  • the diameter of the valve function portion 52 and the diameter of the mounting portion 62 may be the same, and the valve function portion 52 and the mounting portion 62 may be connected flat.
  • the mounting portion 62 is sandwiched between the heat-adhesive resin layer 38 and the peripheral edge sealing portion 21 is not heat-bonded on the valve function portion 52, it is possible to prevent the valve mechanism from being damaged by the heat and pressure applied during the heat bonding. it can.
  • the length L2 of the valve function portion 52 is longer than the length L1 of the mounting portion 62, and the step 51c at the boundary between the valve function portion 52 and the mounting portion 62. Is formed.
  • the step 51c functions as a stopper. Therefore, the valve function portion 52 does not enter between the packaging materials 15 and 25, and thermal adhesion on the valve function portion 52 can be reliably prevented.
  • the cross-sectional shape of the ventilation passage 63 is circular, the ventilation passage 63 can be easily formed.
  • the corners on the outer peripheral side of the end portion on the side opposite to the valve function portion 52 are rounded. As a result, even if the inner end portion of the mounting portion 62 comes into contact with the power storage element 11, the possibility of damaging the power storage element 11 can be reduced. Further, it is possible to prevent the thermosetting resin layers 38 of the packaging materials 15 and 25 from being scratched due to contact with the inner end portion of the mounting portion 62.
  • valve device 50 is attached to the upper side of the exterior member 20 formed in a substantially rectangular shape when viewed from the depth direction of the storage portion 16. Therefore, the power storage device 10 provided with the valve device 50 can be easily installed at the bottom of the vehicle.
  • the lateral direction (Z direction) in the plane perpendicular to the depth direction of the storage portion 16 is arranged in the height direction, the length Ax in the X direction of the storage portion 16 is larger than the length Az in the Z direction. large. As a result, the height of the power storage device 10 can be lowered to improve the comfort of the electric vehicle 1, and the power storage device 10 having a large capacity can be obtained.
  • the length Ax of the storage portion 16 in the X direction is 2 to 30 times the length Az in the Z direction, it is possible to obtain a power storage device 10 having a large capacity and improve the yield of the exterior member 20. ..
  • peripheral seal portion 21 extending in the X direction is overlapped on the peripheral wall of the storage portion 16 by bending, the height of the power storage device 10 can be further lowered.
  • the flow directions of the packaging materials 15 and 25 are orthogonal to the X direction, it is possible to suppress the occurrence of cracks and pinholes in the exterior member 20 when the peripheral edge seal portion 21 extending in the X direction is bent.
  • the height of the power storage device 10 can be further lowered.
  • the electrode terminal 12 and the electrode terminal 13 project from the peripheral seal portion 21 facing in the X direction, deterioration of the power storage device 10 over time can be suppressed.
  • the power storage device pack 5 (collection of power storage devices) is formed by arranging the power storage devices 10 in parallel in the depth direction (Y direction) of the storage unit 16, and the length By of the power storage device pack 5 in the Y direction is the Z direction. Is greater than the length Bz of. As a result, the height of the power storage device pack 5 can be lowered to supply desired power.
  • the power storage device pack 5 is installed in one stage in the height direction of the electric vehicle 1, the comfortability of the electric vehicle 1 can be improved.
  • the valve function portion 52 and the mounting portion 62 have a housing 51 made of the same material (resin), but the housing of the valve function portion 52 and the housing of the mounting portion 62 are made of different materials. It may be configured.
  • the mounting portion 62 can be made of a material (for example, a resin such as polyolefin) having the same thermal adhesiveness as the innermost layers of the packaging materials 15 and 25.
  • a material other than the thermosetting resin is used when the mounting portion 62 requires high heat resistance, heat is interposed via an adhesive protective film similar to the tab films 12a and 13a (see FIG. 5). The method of bonding is effective.
  • the melting point of the material of the housing of the valve function portion 52 is higher than the melting point of the material of the material of the mounting portion 62.
  • the mounting portion 62 is made of polypropylene (PP), and the housing of the valve function portion 52 has a resin having a higher melting point than PP (for example, fluororesin, polyester resin, polyimide resin, polycarbonate resin, acrylic resin). Or metal.
  • PP polypropylene
  • the resin having a higher melting point than PP for example, fluororesin, polyester resin, polyimide resin, polycarbonate resin, acrylic resin.
  • metal for example, a fluororesin having a high barrier property is preferable.
  • valve functional portion may be deformed by heat because the melting point of the housing of the valve functional portion 52 is high. Is low. Therefore, it is possible to suppress a failure of the valve mechanism in the valve function portion 52 during thermal bonding of the thermosetting resin layer 38.
  • the housing 51 of the valve device 50 does not necessarily have to be made of resin, and may be made of metal (aluminum, aluminum alloy, stainless steel, steel, titanium, etc.), for example.
  • an adhesive protective film similar to the tab films 12a and 13a may be arranged between the mounting portion 62 and the thermosetting resin layer 38.
  • This adhesive protective film is configured such that one surface adheres to at least a resin and the other surface adheres to at least a metal, and various known adhesive protective films can be adopted.
  • FIGS. 19 and 20 show an exploded perspective view and a side sectional view of the power storage device 10 of the second embodiment.
  • the same parts as those in the first embodiment shown in FIGS. 1 to 18 are designated by the same reference numerals.
  • the shape of the packaging material 25 is different from that of the first embodiment, and other parts are the same as those of the first embodiment.
  • the packaging material 25 has a storage portion 26 and a flange portion 27 like the packaging material 15.
  • the storage portion 26 opens a substantially rectangular opening 26a on one surface.
  • the power storage element 11 is stored in the storage portion 16 of the packaging material 15 and the storage portion 26 of the packaging material 25.
  • the flange portion 27 is formed in an annular shape protruding outward from the peripheral edge of the opening 26a.
  • peripheral seal portion 21 extending in the X direction protrudes in the Z direction as shown by the alternate long and short dash line 21'during thermal bonding, is bent after thermal bonding, and is overlapped on the peripheral wall of the storage portion 16 or the storage portion 26.
  • the power storage device 10 is arranged in the depth direction (Y direction) of the storage portions 16 and 26 in the front-rear direction of the electric vehicle 1. Further, the longitudinal direction (X direction) in the plane perpendicular to the depth direction of the storage portions 16 and 26 is arranged in the left-right direction of the electric vehicle 1, and the lateral direction (Z direction) is in the height direction of the electric vehicle 1. Be placed.
  • the packaging material 15 and the packaging material 25 are provided with the storage unit 16 and the storage unit 26, respectively, the volume of the power storage element 11 can be increased to increase the capacity of the power storage device 10. Therefore, it is possible to reduce the number of power storage devices 10 forming the power storage device pack 5 (see FIG. 3) and reduce the man-hours for manufacturing the power storage device pack 5.
  • the power storage device 10 may be covered with the protective covers 8 and 9.
  • the protective covers 8 and 9 are formed by injection molding into a bottomed tubular shape having an opening on one side and having a rectangular cross section. Further, the outer shape of the protective cover 9 is formed smaller than the opening of the protective cover 8.
  • the peripheral edge seal portion 21 at the lower end protruding from the peripheral portion of the exterior member 20 is bent along the peripheral wall of the protective cover 9, and the protective cover 8 is fitted to the protective cover 9 along the peripheral edge seal portion 21. At this time, a notch 8a is formed in the protective cover 8 in order to avoid interference between the protective cover 8 and the valve device 50.
  • the lower peripheral edge seal portion 21 is bent at a position away from the peripheral edge of the openings 16a and 26a (see FIG. 7) of the storage portions 16 and 26. Therefore, it is possible to reduce the occurrence of cracks and pinholes due to bending of the peripheral seal portion 21.
  • FIG. 22 shows the power storage device 10 covered with protective covers 8 and 9 having a shape different from that of FIG. 21.
  • the protective covers 8 and 9 are formed into substantially the same shape by injection molding, and are formed in a bottomed tubular shape having an opening on one surface.
  • the power storage device 10 omits the bending step, and the protective covers 8 and 9 are fixed in a state where the peripheral seal portion 21 protruding from the peripheral portion of the exterior member 20 is sandwiched between the peripheral walls of the protective covers 8 and 9. As a result, the peripheral seal portion 21 is protected. Since the bending step is omitted, it is possible to reduce the occurrence of cracks and pinholes due to bending of the peripheral seal portion 21.
  • the exterior member 20 may be covered with the same protective covers 8 and 9 for the power storage device 10 of the first embodiment.
  • FIG. 23 shows an exploded perspective view of the power storage device 10 of the third embodiment.
  • the same parts as those in the second embodiment shown in FIGS. 19 and 20 are designated by the same reference numerals.
  • the packaging material 15 and the packaging material 25 are formed of a single member. Other parts are the same as those in the second embodiment.
  • the packaging material 15 (first packaging material) having the storage portion 16 and the packaging material 25 (second packaging material) having the storage portion 26 are integrally formed continuously in the Z direction.
  • the flange portion 17 of the packaging material 15 and the flange portion 27 of the packaging material 25 are formed flush with each other via the folding line 20a.
  • the exterior member 20 is bent on the folding line 20a extending in the X direction. Then, the flange portions 17 and 27 facing each other are heat-bonded to form the peripheral edge sealing portion 21.
  • the same effect as that of the second embodiment can be obtained. Further, since the packaging material 15 and the packaging material 25 are formed of a single member, the number of parts of the power storage device 10 can be reduced.
  • the openings 16a and 26a may be close to each other, and the folding line 20a may be provided along the peripheral edge of the openings 16a and 26a.
  • the lower surface of the power storage device 10 can be formed flat. Therefore, the adhesion between the installation surface on which the power storage device 10 is installed and the power storage device 10 is improved, and the heat dissipation of the power storage device 10 can be improved.
  • packaging material 15 and the packaging material 25 of the first and second embodiments may be formed of a single member which is continuously provided via a folding line at the lower end.
  • FIG. 24 shows a top view of the electric vehicle 1 of the fourth embodiment.
  • the same parts as those in the first embodiment shown in FIGS. 1 to 18 are designated by the same reference numerals.
  • the arrangement of the power storage device pack 5 is different from that in the first embodiment.
  • Other parts are the same as those in the first embodiment.
  • the power storage device pack 5 is installed under the floor of the vehicle body of the electric vehicle 1, and the power storage device 10 is arranged side by side in the left-right direction of the electric vehicle 1.
  • the power storage device 10 is arranged in the depth direction (Y direction) of the storage portion 16 (see FIG. 4) in the left-right direction of the electric vehicle 1.
  • the longitudinal direction (X direction, first direction) in the plane perpendicular to the depth direction of the storage portion 16 is arranged in the left-right direction of the electric vehicle 1
  • the lateral direction (Z direction, second direction) is the electric vehicle. It is arranged in the height direction of 1.
  • the X direction orthogonal to the depth direction of the storage portion 16 is arranged in the front-rear direction of the electric vehicle 1, and the depth direction of the storage portion 16 and the Z direction orthogonal to the X direction are arranged in the height direction of the electric vehicle 1. Will be done.
  • the power storage device 10 can be cooled.
  • the power storage device 10 of the second embodiment or the third embodiment may be installed in the electric vehicle 1 and the power storage device 10 may be arranged side by side in the left-right direction of the electric vehicle 1.
  • FIG. 25 shows a cross-sectional view of the valve device 50 of the power storage device 10 of the electric vehicle 1 of the fifth embodiment.
  • the same parts as those in the first embodiment shown in FIGS. 1 to 18 are designated by the same reference numerals.
  • the shape of the mounting portion 62 of the valve device 50 is different from that in the first embodiment.
  • Other parts are the same as those in the first embodiment.
  • the length L5 in the X direction is longer than the length L6 in the Y direction (see FIG. 6).
  • the cross-sectional shape of the mounting portion 62 is an elliptical shape.
  • a ventilation path 63 is formed inside the mounting portion 62. Similarly, the length of the air passage 63 in the X direction is longer than the length in the Y direction. More specifically, the cross-sectional shape of the air passage 63 is elliptical.
  • the length L5 of the mounting portion 62 in the X direction is longer than the length L6 in the Y direction (the depth direction of the storage portion 16). That is, the length of the mounting portion 62 in the Y direction is shorter than that in the case where the cross-sectional shape of the mounting portion 62 is a circle (same area) in the first embodiment.
  • the thickness of the peripheral seal portion 21 on the mounting portion 62 in the Y direction (length L4, see FIG. 14) and the thickness of the portion where the mounting portion 62 is not sandwiched (length L3, see FIG. 14). The difference can be made smaller. Therefore, the mounting portion 62 of the valve device 50 can be firmly fixed by the exterior member 20.
  • the valve device 50 of the present embodiment may be provided in the power storage device 10 of the electric vehicle 1 of the second to fourth embodiments.
  • FIG. 26 shows a cross-sectional view of the valve device 50 of the power storage device 10 of the electric vehicle 1 of the sixth embodiment.
  • the same parts as those in the first embodiment shown in FIGS. 1 to 18 are designated by the same reference numerals.
  • the shape of the mounting portion 62 of the valve device 50 is different from that in the first embodiment.
  • Other parts are the same as those in the first embodiment.
  • the mounting portion 62 is formed with wing-shaped extension portions 64 at both ends in the X direction.
  • Each wing-shaped extending end portion 64 has a shape that becomes thinner as it approaches the end portion in the X direction. From another point of view, the length of each wing-shaped extension portion 64 changes more slowly in the Y direction (depth direction of the storage portion 16) than the other portion (circular portion) of the mounting portion 62. It can be said to be a part.
  • the change is smooth. Therefore, the thermosetting resin layer 38 can be easily brought into close contact with the peripheral surface of the mounting portion 62 at the time of heat bonding, and the mounting portion 62 can be more firmly fixed to the exterior member 20.
  • the valve device 50 of the present embodiment may be provided in the power storage device 10 of the electric vehicle 1 of the second to fourth embodiments.
  • FIGS. 27 and 28 show a front view and a cross-sectional view of the valve device 50 of the power storage device 10 of the electric vehicle 1 of the seventh embodiment.
  • the same parts as those in the first embodiment shown in FIGS. 1 to 18 are designated by the same reference numerals.
  • the shape of the mounting portion 62 of the valve device 50 is different from that in the first embodiment.
  • Other parts are the same as those in the first embodiment.
  • Each pillar 65 extends in the Z direction and is arranged side by side in the X direction, and both ends in the Y direction are connected to the inner circumference of the mounting portion 62.
  • the number of pillars 65 does not have to be two, but at least one.
  • the ventilation passage 63 since the pillar 65 is formed in the ventilation passage 63, even if pressure and heat are applied to the mounting portion 62 sandwiched between the opposing thermosetting resin layers 38, the ventilation passage 63 The shape is maintained. Therefore, it is possible to suppress damage to the ventilation passage 63 in the mounting portion 62 during heat bonding.
  • the valve device 50 of the present embodiment may be provided in the power storage device 10 of the electric vehicle 1 of the second to fourth embodiments.
  • FIG. 29 shows a front view of the valve device 50 of the power storage device 10 of the electric vehicle 1 of the eighth embodiment.
  • the same parts as those in the first embodiment shown in FIGS. 1 to 18 are designated by the same reference numerals.
  • the shape of the mounting portion 62 of the valve device 50 is different from that in the first embodiment.
  • Other parts are the same as those in the first embodiment.
  • the mounting portion 62 of the valve device 50 according to the present embodiment has a roughened outer surface and is formed in a satin finish.
  • the surface roughness Ra of the outer surface of the mounting portion 62 is, for example, 1 ⁇ m to 20 ⁇ m.
  • the adhesive strength with the thermosetting resin layer 38 can be improved at the position where the mounting portion 62 is in contact with the mounting portion 62. Therefore, the mounting portion 62 of the valve device 50 can be firmly fixed to the exterior member 20 as compared with the case where the outer surface of the mounting portion 62 is smooth.
  • the valve device 50 of the present embodiment may be provided in the power storage device 10 of the electric vehicle 1 of the second to fourth embodiments.
  • FIGS. 30 and 31 show a front view of the valve device 50 of the power storage device 10 of the electric vehicle 1 of the ninth embodiment and a vertical sectional view of the mounting portion 62.
  • the same parts as those in the first embodiment shown in FIGS. 1 to 18 are designated by the same reference numerals.
  • the shape of the mounting portion 62 of the valve device 50 is different from that in the first embodiment.
  • Other parts are the same as those in the first embodiment.
  • a ridge portion 66 On the outer surface of the mounting portion 62, a ridge portion 66 extending continuously in the circumferential direction is formed. Three ridges 66 are arranged side by side in the axial direction. It should be noted that the number of the convex portions 66 does not necessarily have to be three, and at least one may be formed.
  • the vertical cross section of the ridge portion 66 is formed in a semicircular shape, and the radius of the ridge portion 66 is, for example, 0.05 mm to 1.0 mm.
  • the diameter L12 (lengths in the X and Y directions) of the mounting portion 62 on the ridge portion 66 is longer than the diameter L11 of the portion where the ridge portion 66 is not formed.
  • the ridge portion 66 is surely in contact with the heat-adhesive resin layer 38, so that it is easily fused to the packaging materials 15 and 25. Since the ridge portion 66 extends continuously in the circumferential direction of the outer surface of the mounting portion 62, the thermosetting resin layer 38 and the mounting portion can be fused around the circumferential direction of the mounting portion 62.
  • the mounting portion 62 of the valve device 50 can be firmly fixed to the packaging materials 15 and 25.
  • the formation position of the ridge portion 66 does not have to exist in the entire circumference as long as it extends in the circumferential direction, and may not be continuous. Further, the ridge portion 66 can be formed intermittently in the circumferential direction.
  • the ridge portion 66 may not be provided on the entire or the tip portion of the wing-shaped extension portion 64.
  • the valve device 50 of the present embodiment may be provided in the power storage device 10 of the electric vehicle 1 of the second to fourth embodiments.
  • FIGS. 32 and 33 show a front view and a cross-sectional view of the valve device 50 of the power storage device 10 of the electric vehicle 1 of the tenth embodiment.
  • the same parts as those in the first embodiment shown in FIGS. 1 to 18 are designated by the same reference numerals.
  • the shapes of the valve function portion 52 and the mounting portion 62 of the valve device 50 are different from those of the first embodiment.
  • Other parts are the same as those in the first embodiment.
  • the cross-sectional shape of the valve function portion 52 is a semicircular shape with one end surface in the Y direction flat. Further, the mounting portion 62 is provided with wing-shaped extending ends 64 at both ends in the X direction, and one end surface in the Y direction is formed flat. The planes parallel to the X direction on the outer surfaces of the valve function portion 52 and the mounting portion 62 are flush with each other.
  • FIG. 34 is a diagram showing a state when the valve device 50 is attached to the exterior member 20. As shown in the figure, when the valve device 50 is attached to the exterior member 20, the flat surface portion is placed on the innermost surface of the packaging material 25. At this time, since the valve device 50 does not roll, the valve device 50 can be easily positioned.
  • the direction in which the peripheral seal portion 21 of the valve device 50 protrudes and the direction in which the storage portion 16 protrudes can be the same. Therefore, it is possible to prevent the power storage device 10 arranged at one end (left end in FIG. 3) of the power storage device pack 5 (see FIG. 3) in the Y direction from protruding in the Y direction by the valve device 50. Therefore, the power storage device pack 5 can be miniaturized.
  • a flat surface parallel to the X direction may be provided on the outer surface of only one of the valve function portion 52 and the mounting portion 62.
  • the valve device 50 of the present embodiment may be provided in the power storage device 10 of the electric vehicle 1 of the second to fourth embodiments.
  • FIG. 35 shows a cross-sectional view of the valve device 50 of the power storage device 10 of the electric vehicle 1 of the eleventh embodiment.
  • the same parts as those in the first embodiment shown in FIGS. 1 to 18 are designated by the same reference numerals.
  • the shape of the mounting portion 62 of the valve device 50 is different from that in the first embodiment.
  • Other parts are the same as those in the first embodiment.
  • the cross section of the mounting portion 62 has a rhombus shape.
  • the length L7 of the mounting portion in the X direction is longer than the length L8 in the Y direction.
  • the difference between the length L4 (see FIG. 14) on the mounting portion 62 in the Y direction of the peripheral seal portion 21 and the length L3 (see FIG. 14) of the portion where the mounting portion 62 is not sandwiched is made smaller. it can. Therefore, the mounting portion 62 of the valve device 50 can be firmly fixed by the exterior member 20.
  • the valve device 50 of the present embodiment may be provided in the power storage device 10 of the electric vehicle 1 of the second to fourth embodiments.
  • FIG. 36 shows a cross-sectional view of the valve device 50 of the power storage device 10 of the electric vehicle 1 of the twelfth embodiment.
  • the same parts as those in the first embodiment shown in FIGS. 1 to 18 are designated by the same reference numerals.
  • the shape of the mounting portion 62 of the valve device 50 is different from that in the first embodiment.
  • Other parts are the same as those in the first embodiment.
  • the cross section of the mounting portion 62 is formed in a hexagonal shape with a diamond shape chamfered at both ends in the Y direction.
  • the length L9 of the mounting portion in the X direction is longer than the length L10 in the Y direction.
  • the difference between the length L4 (see FIG. 14) on the mounting portion 62 in the Y direction of the peripheral seal portion 21 and the length L3 (see FIG. 14) of the portion where the mounting portion 62 is not sandwiched is made smaller. it can. Therefore, the mounting portion 62 of the valve device 50 can be more firmly fixed to the exterior member 20.
  • the valve device 50 of the present embodiment may be provided in the power storage device 10 of the electric vehicle 1 of the second to fourth embodiments.
  • FIG. 37 shows a cross-sectional view of the valve device 50 of the power storage device 10 of the electric vehicle 1 of the thirteenth embodiment.
  • the same parts as those in the first embodiment shown in FIGS. 1 to 18 are designated by the same reference numerals.
  • the shape of the mounting portion 62 of the valve device 50 is different from that in the first embodiment.
  • Other parts are the same as those in the first embodiment.
  • the mounting portion 62 has a rhombus shape, and wing-shaped extension portions 64 are formed at both ends in the X direction.
  • Each wing-shaped extending end portion 64 has a shape that becomes thinner as it approaches the end portion in the X direction. From another point of view, the length of each wing-shaped extension portion 64 changes more slowly in the Y direction (depth direction of the storage portion 16) than the other portion (diamond-shaped portion) of the mounting portion 62. It can be said to be a part.
  • the length in the Y direction from the portion where the attachment portion 62 of the peripheral edge seal portion 21 is not sandwiched to the portion sandwiched is as compared with the case where the wing-shaped extended end portion 64 is not provided.
  • the change is smooth. Therefore, the thermosetting resin layer 38 can be easily brought into close contact with the peripheral surface of the mounting portion 62 at the time of heat bonding, and the mounting portion 62 can be more firmly fixed to the exterior member 20.
  • the valve device 50 of the present embodiment may be provided in the power storage device 10 of the electric vehicle 1 of the second to fourth embodiments.
  • FIG. 38 shows a cross-sectional view of the valve device 50 of the power storage device 10 of the electric vehicle 1 of the 14th embodiment.
  • the same parts as those in the first embodiment shown in FIGS. 1 to 18 are designated by the same reference numerals.
  • the shape of the mounting portion 62 of the valve device 50 is different from that in the first embodiment.
  • Other parts are the same as those in the first embodiment.
  • the portion of the mounting portion 62 sandwiched between the thermosetting resin layers 38 may damage the thermosetting resin layer 38. Can be lowered. Therefore, it is possible to prevent a decrease in the insulating property of the thermosetting resin layer 38.
  • the valve device 50 of the present embodiment may be provided in the power storage device 10 of the electric vehicle 1 of the second to fourth embodiments.
  • FIGS. 39 and 40 show a front view of the packaging material 15 of the power storage device 10 of the electric vehicle 1 of the fifteenth embodiment and an enlarged top view of a main part.
  • the same parts as those in the first embodiment shown in FIGS. 1 to 18 are designated by the same reference numerals.
  • the flange portion 17 is provided with a valve device arrangement portion 17a.
  • Other parts are the same as those in the first embodiment.
  • the valve device arrangement portion 17a formed on the flange portion 17 has a semicircular shape.
  • the diameter of the semicircular shape of the valve device arrangement portion 17a is slightly longer than the diameter of the attachment portion 62.
  • the valve device arrangement portion 17a may be provided on the packaging material 25. Even in this case, the same effect as when the valve device arrangement portion 17a is provided on the packaging material 15 can be obtained.
  • FIG. 41 shows a front view of the power storage device 10 of the electric vehicle 1 of the 16th embodiment.
  • the same parts as those in the first embodiment shown in FIGS. 1 to 18 are designated by the same reference numerals.
  • the shape of the portion of the peripheral seal portion 21 to which the valve device 50 is attached is different from that of the first embodiment.
  • Other parts are the same as those in the first embodiment.
  • FIG. 42 shows an enlarged view of part J of FIG. 41.
  • the attachment portion 62 of the valve device 50 is arranged on the peripheral edge seal portion 21.
  • the inner end portion of the valve function portion 52 is not in contact with the outer edge P1 of the peripheral edge seal portion 21, and is arranged at intervals from the outer edge P1 to the outside.
  • the peripheral edge seal portion 21 has a recess 21a recessed outward in the vicinity of the mounting portion 62. More specifically, the inner edge P2 (see FIG. 9) of the peripheral edge seal portion 21 is arranged on three lines K1 to K3 adjacent to each other along the extending direction of the inner edge P2 in the vicinity of the mounting portion 62. To.
  • Line K1 (first line) intersects the mounting portion 62.
  • the line K2 (second line) is continuous with one end of the line K1
  • the line K3 (third line) is continuous with the other end of the line K1.
  • Line K2 and line K3 extend in the X direction at the same position in the Z direction.
  • the line K1 extends diagonally outward from the end of the line K2, bends in the X direction, straddles the mounting portion 62, extends diagonally inward, and is connected to the line K3.
  • the line K1 is located outside the lines K2 and K3, and extends in the X direction between the lines K2 and K3 outside the lines K2 and K3.
  • the exterior member 20 has a space S3 that projects outward from the space S1 in the storage portion 16 in which the power storage element 11 is arranged toward the mounting portion 62 in the vicinity of the mounting portion 62.
  • the inner end 62a of the mounting portion 62 is located outside the inner edge P3 of the flange portion 17 (outer edge of the storage portion 16, see FIG. 9). Therefore, the possibility that the inner end portion of the mounting portion 62 comes into contact with the power storage element 11 arranged in the storage portion 16 is reduced, and damage to the power storage element 11 can be suppressed.
  • the inner end 62a of the mounting portion 62 reaches the inner edge P2 (see FIG. 9) of the peripheral edge sealing portion 21, and further protrudes toward the storage portion 16.
  • an opening communicating with the storage portion 16 is formed at the inner end portion of the housing 51 in the closed state of the valve mechanism.
  • the inner end 62a of the mounting portion 62 is located in the space S3 and does not reach the inside of the storage portion 16.
  • a corner R is formed on the outer peripheral portion of the inner end portion of the mounting portion 62 as in the first embodiment.
  • FIG. 43 shows another mounting example of the valve device 50, and shows an enlarged view of the J portion of FIG. 41.
  • the valve device 50 is attached so that the inner end portion of the valve function portion 52 is in contact with the outer end edge P1 of the peripheral edge seal portion 21.
  • the valve device 50 can be reliably positioned with respect to the peripheral seal portion 21 by utilizing the step between the valve function portion 52 and the mounting portion 62. Therefore, by designing the length of the mounting portion 62 in the Z direction to be longer than the sealing width of the peripheral edge sealing portion 21, the inner end 62a of the mounting portion 62 is set to the inner edge P2 of the peripheral edge sealing portion 21 in the space S3. Can be reliably projected from.
  • the X direction (first direction) and the Z direction (second direction) orthogonal to each other in the plane perpendicular to the depth direction of the storage portion 16 of the electric vehicle 1 It is arranged in the left-right direction and the height direction.
  • the valve device 50 is attached to the peripheral seal portion 21 of the exterior member 20, it is possible to accurately control the pressure for degassing.
  • the inner end 62a of the mounting portion 62 is located outside the inner edge P3 (outer edge of the storage portion 16) of the flange portion 17. Therefore, the possibility that the inner end portion of the mounting portion 62 comes into contact with the power storage element 11 arranged in the storage portion 16 is reduced, and damage to the power storage element 11 can be suppressed.
  • valve function portion 52 protrudes from the outer shape of the mounting portion 62 (second portion) in the depth direction (Y direction) of the storage portion 16. Further, the valve function portion 52 (first portion) has a larger cross-sectional area than the mounting portion 62 (second portion) in the cross section orthogonal to the extending direction of the air passage 63. As a result, similarly to the above, the mounting portion 62 can be firmly fixed to the exterior member 20 by appropriately heat-bonding the opposing thermosetting resin layers 38 while preventing dielectric breakdown of the power storage device 10.
  • the inner end of the valve device 50 reaches the inner end edge P2 of the peripheral edge sealing portion 21 on the outer side of the inner edge P3 (outer edge of the storage portion 16) of the flange portion 17, and reaches the inner end portion of the housing 51. Is formed with an opening communicating with the storage portion 16 in the closed state of the valve mechanism. Therefore, it is possible to prevent clogging of the ventilation passage 63 due to a part of the packaging materials 15 and 25 melted during the formation of the peripheral seal portion 21 entering the ventilation passage 63 through the opening.
  • valve device 50 projects from the inner edge P2 of the peripheral edge seal portion 21 of the exterior member 20 toward the storage portion 16. That is, the inner end portion of the valve device 50 is separated from the peripheral edge sealing portion 21. Therefore, when the peripheral edge seal portion 21 is formed, the cause of failure of the valve device 50 such as heat and pressure applied to the peripheral edge seal portion 21 is less likely to act on the inner end portion of the valve device 50. Therefore, it is possible to suppress a failure when the valve device 50 is attached.
  • the power storage device 10 of the electric vehicle 1 of the second to fifteenth embodiments may be provided with the same recess 21a as in the present embodiment.
  • FIG. 44 shows a front view of the power storage device 10 of the electric vehicle 1 of the 17th embodiment.
  • FIG. 45 shows a cross-sectional view taken along the line GG of FIG.
  • the same parts as those in the first embodiment shown in FIGS. 1 to 18 are designated by the same reference numerals.
  • the shape of the portion of the peripheral seal portion 21 to which the valve device 50 is attached is different from that of the first embodiment.
  • Other parts are the same as those in the first embodiment.
  • the valve function portion 52 of the valve device 50 forms an outer portion located outside the peripheral seal portion 21.
  • the attachment portion 62 of the valve device 50 is sandwiched between the thermosetting resin layers 38 (see FIG. 7) of the packaging materials 15 and 25 at the peripheral seal portion 21.
  • the outer surface of the sandwiching portion that sandwiches the mounting portion 62 of the peripheral seal portion 21 is provided with irregularities by the concave portion 23 and the convex portion 24.
  • FIG. 46 is an enlarged view showing a portion where the mounting portion 62 of the peripheral seal portion 21 is sandwiched.
  • the recessed portion 23 extends in the circumferential direction of the valve device 50 along the extending direction (X direction) of the peripheral edge sealing portion 21, and is recessed on the outer surface of the peripheral edge sealing portion 21.
  • the depth D1 of the recessed portion 23 is, for example, 0.05 mm to 0.1 mm depending on the thickness of the packaging materials 15 and 25.
  • the bottom of the concave portion 23 has a semicircular corner R formed on the YZ cross section and is rounded.
  • a plurality of concave portions 23 are arranged side by side in the Z direction, and a convex portion 24 is formed between the plurality of concave portions 23.
  • the ridge portion 24 projects outward in the depth direction (Y direction) of the storage portion 16 (see FIG. 45). That is, the convex portion 24 (first convex portion) on the packaging material 15 projects more outward than the concave portion 23 (first concave portion) in the depth direction of the storage portion 16 (see FIG. 45).
  • the convex portion 24 (second convex portion) on the packaging material 25 projects more outward than the concave portion 23 (second concave portion) of the storage portion 16 (see FIG. 45) in the depth direction.
  • the peripheral seal portion 21 is formed by a heat seal device in the heat seal process (see FIG. 17).
  • FIG. 47 shows a schematic configuration diagram of the heat sealing device 80.
  • the heat sealing device 80 applies pressure and heat to the sides of the packaging materials 15 and 25 provided with the valve device 50 and heat-bonds them to form the peripheral sealing portion 21.
  • the peripheral edge sealing portion 21 is formed by another heat sealing device omitting the ridge portion 82a described later.
  • the heat seal device 80 includes a heat seal bar provided with a heat seal head 82 on the base 81, and a heating unit 83.
  • the heating unit 83 is configured to heat the heat seal head 82 by using electric power supplied from an external power source.
  • As the heating unit 83 various configurations used in known heat sealing devices can be adopted.
  • the heat seal head 82 extends in the X direction along the peripheral edges of the packaging materials 15 and 25, and a plurality of ridge portions 82a are provided on the surface (sandwiching surface) facing the peripheral edge seal portion 21. Since the recesses are formed between the plurality of convex portions 82a, the heat seal head 82 is provided with irregularities.
  • Each convex portion 82a extends in the X direction, and a semicircular corner R is formed at the tip of each convex portion 82a on the YZ cross section. Further, the height H1 of each convex portion 82a is formed to be, for example, 0.05 mm to 1 mm.
  • the convex strips 82a push the packaging materials 15 and 25 toward the mounting portion 62.
  • the packaging materials 15 and 25 and the mounting portion 62 are joined at the position pushed by the heat seal head 82.
  • the packaging materials 15 and 25 and the mounting portion 62 are more firmly joined at the position of the concave portion 23 formed by being deeply pushed by the convex portion 82a. That is, the heat seal head 82 can firmly join the packaging materials 15 and 25 and the mounting portion 62 at the recessed portion 23 without applying an unnecessarily strong pressure.
  • thermosetting resin forming the thermosetting resin layer 38 is separated by the concave portion 23, the thermosetting resin does not flow more than necessary. Therefore, in the power storage device 10, the entire thermosetting resin layer 38 (the entire area extending in the Z direction) is not thinner than necessary. As a result, it is possible to suppress the possibility of dielectric breakdown occurring around the mounting portion 62, particularly at the sealing portion between the mounting portion 62 and the packaging material 15 at the tip portion of the mounting portion 62.
  • the peripheral edge seal portion 21 is formed with irregularities (concave portion 23 and ridge portion 24) on the outer surface of the sandwiching portion that sandwiches the mounting portion 62 of the valve device 50.
  • the unevenness on the peripheral edge sealing portion 21 can be easily formed by the ridge portion 82a provided on the heat sealing head 82 of the heat sealing device 80.
  • the heat-adhesive resin layers 38 of the packaging materials 15 and 25 and the mounting portion 62 can be firmly joined without applying an unnecessarily strong pressure by the heat seal head 82.
  • thermosetting resin forming the thermosetting resin layer 38 is separated by the concave portion 23, the thermosetting resin does not flow more than necessary. Therefore, in the power storage device 10, the entire thermosetting resin layer 38 (the entire area extending in the Z direction) is not thinner than necessary. As a result, it is possible to suppress the possibility of dielectric breakdown occurring around the mounting portion 62, particularly at the sealing portion between the mounting portion 62 and the packaging material 15 at the tip portion of the mounting portion 62.
  • the unevenness on the peripheral edge seal portion 21 is formed by the concave portion 23 extending in the circumferential direction of the valve device 50, and the depth of the concave portion 23 is formed to be 0.05 mm to 0.1 mm.
  • the thermosetting resin layer 38 and the mounting portion 62 can be reliably joined, and the packaging materials 15 and 25 can be prevented from being damaged when the peripheral seal portion 21 is formed.
  • the unevenness provided on one surface of the peripheral edge sealing portion 21 protrudes to the outside of the concave portion 23 (first concave portion) and the depth direction (Y direction) of the storage portion 16 from the concave portion 23.
  • the ridge portion 24 (first convex portion) is included.
  • the unevenness provided on the other surface of the peripheral edge sealing portion 21 is a convex portion protruding outward from the concave portion 23 (second concave portion) and the other side in the depth direction (Y direction) of the storage portion 16 from the concave portion 23. Includes the strip 24 (second convex portion).
  • the bottom of the concave portion 23 (first concave portion and second concave portion) is rounded. Therefore, a sharp member is not used during thermal bonding of the peripheral seal portion 21, and deterioration of the outer surface of the exterior member 20 during the manufacturing process can be suppressed.
  • the power storage device 10 of the electric vehicle 1 of the second to sixteenth embodiments may be provided with the same recessed portion 23 as in the present embodiment.
  • FIG. 48 shows a front view of the power storage device 10 of the electric vehicle 1 of the 18th embodiment.
  • the same parts as those in the 17th embodiment shown in FIGS. 44 to 46 described above are designated by the same reference numerals.
  • This embodiment is different from the 17th embodiment in the configuration of the peripheral seal portion 21 in which the valve device 50 is arranged. Other parts are the same as those in the 17th embodiment.
  • the peripheral seal portion 21 of the power storage device 10 has irregularities formed on the outer surface by the satin finish 22 on one side where the valve device 50 is arranged.
  • the satin finish 22 is formed on both sides of the exterior member 20 in the Y direction.
  • the surface roughness Ra of the satin finish 22 is, for example, 1 ⁇ m to 20 ⁇ m.
  • FIG. 49 shows a schematic configuration diagram of the heat sealing device 80 forming the peripheral edge sealing portion 21 of the present embodiment.
  • the surface (sandwiched surface) of the heat-sealing device 80 facing the peripheral edge sealing portion 21 of the heat-sealing head 82 is roughened to form irregularities due to the satin finish 82b.
  • the surface roughness Ra of the satin finish 82b is, for example, 1 ⁇ m to 20 ⁇ m.
  • the packaging material 15 and 25 are pushed toward the mounting portion 62 side by the satin finish 82b.
  • the packaging materials 15 and 25 and the mounting portion 62 are joined at the position pushed by the heat seal head 82.
  • the protruding portion of the satin finish 82b pushes the packaging materials 15 and 25 deeply toward the mounting portion 62.
  • the packaging materials 15 and 25 and the mounting portion 62 are firmly joined at the position of the recessed portion of the satin finish 22 formed by being deeply pushed by the protruding portion of the satin finish 82b.
  • the concave and convex portions of the satin finish 22 firmly secure the thermosetting resin layers 38 and the mounting portion 62 of the packaging materials 15 and 25 without applying excessively strong pressure by the heat seal head 82. Can be joined. Therefore, it is possible to suppress a decrease in the sealing property around the mounting portion 62, and it is possible to maintain the sealing property of the exterior member 20.
  • the power storage device 10 of the electric vehicle 1 of the second to sixteenth embodiments may be provided with a satin finish 22 similar to that of the present embodiment.
  • FIG. 50 is an enlarged view showing a portion in which the attachment portion 62 of the peripheral seal portion 21 of the power storage device 10 of the electric vehicle 1 of the 19th embodiment is sandwiched.
  • the same parts as those in the 17th embodiment shown in FIGS. 44 to 46 described above are designated by the same reference numerals.
  • This embodiment is different from the 17th embodiment in the configuration of the peripheral seal portion 21 in which the valve device 50 is arranged. Other parts are the same as those in the 17th embodiment.
  • the outer surface of the peripheral sealing portion 21 in which the mounting portion 62 is sandwiched between the packaging materials 15 and 25 is formed with irregularities by the concave portion 23 and the convex portion 24. ing.
  • the positions of the concave portion 23 and the convex portion 24 formed on the packaging material 15 in the Z direction are different from the positions of the concave portion 23 and the convex portion 24 formed on the packaging material 25 in the Z direction. That is, the position of the concave portion 23 on the packaging material 15 and the position of the concave portion 23 on the packaging material 25 do not overlap with each other in the depth direction (Y direction) of the storage portion 16 (see FIG. 45). Be placed.
  • the power storage device 10 of the electric vehicle 1 of the second to sixteenth embodiments may be provided with the same recessed portion 23 as in the present embodiment.
  • FIGS. 51 and 52 show a front view and a side sectional view of the power storage device 10 of the electric vehicle 1 according to the twentieth embodiment. Further, FIG. 53 shows a cross-sectional view taken along the line KK of FIG.
  • the same parts as those in the first embodiment shown in FIGS. 1 to 18 are designated by the same reference numerals.
  • the configuration of the valve device 50 is different from that in the first embodiment. Other parts are the same as those in the first embodiment.
  • the housing 51 (see FIG. 54) of the valve device 50 has a valve function portion 52, a mounting portion 62, and a parallel portion 72.
  • the parallel portion 72 is arranged between the mounting portion 62 and the valve function portion 52, and has a parallel first plane Q1 and a second plane Q2 (see FIG. 55).
  • FIG. 54, 55, and 56 show a front view, a bottom view, and a top view of the valve device 50. Further, FIG. 57 shows an MM cross-sectional view and an NN cross-sectional view of FIG. 55.
  • the mounting portion 62 is sandwiched between the packaging materials 15 and 25 and fixed to the peripheral sealing portion 21.
  • the valve function portion 52 and the parallel portion 72 are arranged outside the peripheral edge sealing portion 21 and are not sandwiched between the packaging materials 15 and 25 (see FIG. 52).
  • the mounting portion 62, the valve function portion 52, and the parallel portion 72 are continuously arranged in the direction from the inside to the outside (Z direction) of the exterior member 20.
  • valve function portion 52 is arranged outside the peripheral edge seal portion 21, it is possible to reduce damage to the valve mechanism due to deformation of the component parts of the valve mechanism due to heat generated when the mounting portion 62 is heat-bonded. ..
  • the mounting portion 62, the valve function portion 52, and the parallel portion 72 each have a tubular shape having a central axis C1 parallel to the Z direction, and are coaxial with each other.
  • a ventilation path 63 extending in the Z direction is provided on the central axis C1 in the housing 51.
  • the ventilation passage 63 is formed with a circular cross section, and has a first passage portion 63a, a second passage portion 63b, and a third passage portion 63c.
  • the first passage portion 63a is provided in the mounting portion 62, and the inflow port 51d opens at the tip (lower end) of the mounting portion 62.
  • the third passage portion 63c is provided in the parallel portion 72 and is continuous with the first passage portion 63a.
  • the second passage portion 63b is provided in the valve function portion 52 and is continuous with the third passage portion 63c, and the exhaust port 51b opens at the tip (upper end) of the valve function portion 52. That is, the third passage portion 63c is arranged on the inner side of the exterior member 20 from the second passage portion 63b, and the first passage portion 63a is arranged further on the inner side of the exterior member 20 than the third passage portion 63c. ..
  • the outer shape of the valve function portion 52 is generally a cylindrical shape centered on the central axis C1.
  • the outer shape of the parallel portion 72 has a shape in which a part of a cylinder centered on the central axis C1 is cut out. More specifically, the outer shape of the parallel portion 72 is a first plane that is parallel (including the case where it is substantially parallel) with a cylinder centered on the central axis C1 at a certain distance in the Y direction from the central axis C1. It has a shape notched in Q1 and the second plane Q2.
  • the first plane Q1 and the second plane Q2 are parallel to the central axis C1 (including the case where they are substantially parallel). Further, in the present embodiment, the first plane Q1 and the second plane Q2 are parallel (including the case where they are substantially parallel) in the direction in which the peripheral edge sealing portion 21 extends.
  • the outer peripheral surface of the parallel portion 72 has a curved surface Q3 and a curved surface Q4 that connect both ends of the first plane Q1 and the second plane Q2, respectively.
  • the curved surfaces Q3 and Q4 have an arc shape centered on the central axis C1 on a cross section perpendicular to the central axis C1, and overlap the outer shape of the valve function portion 52 in the Z direction.
  • the parallel portion 72 can be formed by cutting the outer peripheral surface of the cylindrical member so that a pair of the first plane Q1 and the second plane Q2 are formed.
  • the outer shape of the mounting portion 62 has a non-circular cross-sectional shape perpendicular to the central axis C1. More specifically, the mounting portion 62 has a first wing-shaped portion 68 formed thinner toward one (first direction) from the central portion in the X direction in a cross section perpendicular to the central axis C1, and the other (second direction). It has a second wing-shaped portion 69 formed thinner toward the direction of. As a result, the mounting portion 62 becomes thicker as it approaches the central portion in the longitudinal direction (X direction) of the power storage device 10, and becomes thinner as it approaches the end portion.
  • the first wing-shaped portion 68 and the second wing-shaped portion 69 form a smooth curved surface on each surface of the mounting portion 62 covered with the packaging materials 15 and 25. Therefore, as compared with the case where the mounting portion 62 is cylindrical, the change in thickness of the peripheral seal portion 21 from the portion not sandwiching the mounting portion 62 to the portion sandwiching the mounting portion 62 becomes smoother. As a result, since no excessive force is applied to the packaging materials 15 and 25 at the peripheral seal portion 21 around the attachment portion 62, the attachment portion 62 can be firmly fixed to the peripheral seal portion 21.
  • the outer shape of the mounting portion 62 is included in the outer shape of the valve function portion 52 and the parallel portion 72.
  • the valve function portion 52 and the parallel portion 72 protrude from the outer shape of the mounting portion 62 in each direction including the depth direction of the storage portion 16 (see FIG. 5). ..
  • a step 51c is formed at the boundary between the parallel portion 72 and the mounting portion 62. Due to this step 51c, the valve device 50 has a shape in which the diameter is discontinuously expanded from the mounting portion 62 toward the parallel portion 72.
  • the outer shapes of the mounting portion 62, the valve function portion 52, and the parallel portion 72 have different cross-sectional shapes perpendicular to the central axis C1 depending on the roles assigned to each.
  • the valve mechanism provided inside the valve function portion 52 opens the second passage portion 63b when the pressure inside the exterior member 20 rises due to the gas generated inside the exterior member 20. Then, the gas that has passed through the first passage portion 63a and the third passage portion 63c is guided to the second passage portion 63b and exhausted to the outside of the exterior member 20 through the exhaust port 51b.
  • valve function portion 52 holds a portion having a main structure for exerting the function of the valve device 50 as a gas vent valve.
  • the valve mechanism is provided in the second passage portion 63b inside the valve function portion 52, and includes a spring 56, a ball 54, and a valve seat 55.
  • valve function portion 52 of the housing 51 has a tubular portion 59 having a fitting hole 59a on the lower surface and an insertion portion 70 to be inserted into the fitting hole 59a.
  • the insertion portion 70 is formed integrally with the parallel portion 72 and the mounting portion 62.
  • the insertion portion 70, the valve seat 55, the ball 54, and the spring 56 are arranged in this order from the inflow port 51d toward the exhaust port 51b in the valve function portion 52.
  • the tubular portion 59, the valve seat 55, and the insertion portion 70 are configured as separate members, but at least a part of them may be integrally formed.
  • the insertion portion 70 is integrally formed with the parallel portion 72 and the mounting portion 62, at least a part of these may be formed as a separate member.
  • the spring 56 is formed by a coil spring and urges the ball 54 downward.
  • the spring 56 may be formed by a leaf spring.
  • the valve seat 55 supports the ball 54 as a valve body urged from the outside by the spring 56. When the ball 54 sits on the valve seat 55, a closed state of the valve device 50 is formed. As a result, the valve mechanism constitutes a ball spring type check valve.
  • the mounting portion 62 is fixed to the peripheral edge sealing portion 21 so that the gas generated inside the exterior member 20 flows into the first passage portion 63a. That is, the first passage portion 63a inside the mounting portion 62 communicates with the storage portion 16 (see FIG. 6) inside the exterior member 20.
  • the gas passing through the first passage portion 63a and the third passage portion 63c communicating with the exterior member 20 presses the ball 54 upward.
  • the ball 54 pressed by the gas moves toward the exhaust port 51b against the spring 56, it separates from the valve seat 55 and the valve device 50 is opened. In this open state, the gas passes through the gap formed between the ball 54 and the valve seat 55 and is discharged to the external space from the exhaust port 51b.
  • the valve device 50 can prevent the ingress of air into the exterior member 20 in the closed state.
  • the pressure inside the exterior member 20 is maintained higher than or equivalent to the pressure inside the external space. Therefore, even in the open state, it is difficult for the atmosphere to enter the inside of the exterior member 20.
  • the valve device 50 can effectively prevent the entry of the atmosphere into the exterior member 20, and can prevent the power storage element 11 from being deteriorated by moisture contained in the atmosphere.
  • the material constituting each part of the valve device 50 is not particularly limited.
  • the mounting portion 62, the valve function portion 52, and the parallel portion 72 may be formed of the same material or may be formed of different materials.
  • the mounting portion 62, the tubular portion 59 of the valve function portion 52, the insertion portion 70, and the parallel portion 72 can be made of a metal such as an aluminum alloy, stainless steel, steel, or titanium.
  • the mounting portion 62, the tubular portion 59 of the valve function portion 52, the insertion portion 70, and the parallel portion 72 may be formed of resin.
  • the mounting portion 62 is preferably made of a material that directly adheres to the innermost layers of the packaging materials 15 and 25. Further, the melting point of the material of the cylinder portion 59 of the valve function portion 52 may be higher than the melting point of the material of the mounting portion 62.
  • the ball 54 may be made of fluororesin and the valve seat 55 may be made of fluororubber.
  • the spring 56 can be made of metal such as stainless steel, and the tubular portion 59 of the valve function portion 52 can be made of metal.
  • the valve seat 55 and the insertion portion 70 can be adhered with an adhesive, and this adhesive is not particularly limited.
  • an adhesive made of acid-modified polyolefin and epoxy resin can be preferably used.
  • an adhesive is superior in that it can suppress deterioration of the adhesive performance due to the electrolytic solution, as compared with the case where, for example, an adhesive made of a modified silicone resin is used.
  • the adhesive can be appropriately applied to various other places. For example, an adhesive can be applied between the lower end surface of the tubular portion 59 of the valve function portion 52 and the upper surface of the parallel portion 72.
  • the surface of the mounting portion 62 is coated with a corrosion inhibitor to form a corrosion preventive coating layer, particularly from the viewpoint of electrolytic solution resistance.
  • a corrosion inhibitor to form a corrosion preventive coating layer, particularly from the viewpoint of electrolytic solution resistance.
  • the mounting portion 62 is made of a metal such as aluminum, the electrolytic solution resistance effect is large, but when it is made of other materials, the electrolytic solution resistance can be improved.
  • Such a coating can be applied by immersing the mounting portion 62 in a liquid of a corrosion inhibitor.
  • the corrosion prevention coating layer can be formed on the outer surface of the mounting portion 62 and the inner surface facing the first passage portion 63a. Therefore, it is possible to prevent the corrosion of the outer surface by the gas in the exterior member 20 and the corrosion of the inner surface by the gas passing through the first passage portion 63a.
  • the material of the corrosion inhibitor is not particularly limited, but an acid-resistant material is preferable and can be formed by phosphoric acid chromate treatment or the like.
  • the mounting portion 62 not only the mounting portion 62 but also the surfaces of the parallel portion 72, the tubular portion 59 of the valve function portion 52, and the insertion portion 70 may be similarly coated to form a corrosion prevention coating layer. From the viewpoint of suppressing deterioration of the adhesive performance between the mounting portion 62 and the packaging materials 15 and 25 due to the electrolytic solution, it is particularly effective to apply such a coating to the mounting portion 62.
  • FIGS. 59 to 61 are diagrams illustrating a state when the valve device 50 in the heat sealing process is attached.
  • the storage portion 16 of the packaging material 15 is omitted.
  • the packaging materials 15 and 25 are fixed in a facing state by a fixture (not shown).
  • the valve device 50 is gripped by the grip portion 92 of the jig 91.
  • the grip portion 92 sandwiches the first plane Q1 and the second plane Q2 of the parallel portion 72 of the valve device 50.
  • the parallel first plane Q1 and the second plane Q2 allow the grip portion 92 to easily come into contact with the entire surfaces of the first plane Q1 and the second plane Q2, and the parallel portion 72 can be reliably sandwiched.
  • the valve device 50 is conveyed by the jig 91, and as shown in FIG. 60, the mounting portion 62 of the valve device 50 is inserted between the packaging materials 15 and 25 facing each other and installed. At this time, the valve device 50 is conveyed so that the parallel portion 72 does not enter the gap between the packaging materials 15 and 25. As a result, the mounting portion 62 of the housing 51 of the valve device 50 is sandwiched between the outer peripheral portions of the packaging materials 15 and 25. At this time, the valve device 50 is installed so that the direction (X direction) in which the peripheral edge sealing portion 21 of the side on which the valve device 50 is arranged extends is parallel to the first plane Q1 and the second plane Q2.
  • a pair of heated heat seal bars 93 sandwich the outer peripheral portions of the packaging materials 15 and 25 from the outside.
  • the outer peripheral portions of the packaging materials 15 and 25 receive heat from the heat seal bar 93 and are heat-bonded to form the peripheral seal portion 21.
  • the valve device 50 is fixed to the peripheral seal portion 21 so that only the mounting portion 62 of the valve device 50 is sandwiched between the packaging materials 15 and 25.
  • the line connecting the sharp ends of both is relative to the extending direction (X direction) of the peripheral seal portion 21. It is fixed without tilting.
  • the pair of heat seal bars 93 retract to a predetermined position, and the grip portion 92 releases the valve device 50 and retracts to a predetermined position.
  • the grip portion 92 can firmly grip the valve device 50 by the pair of parallel first plane Q1 and second plane Q2. Therefore, the valve device 50 can be accurately conveyed to the desired position with respect to the packaging materials 15 and 25. Further, the valve device 50 can be firmly fixed to the packaging materials 15 and 25 at a desired position during the heat sealing process. That is, the valve device 50 can be accurately aligned with the exterior member 20.
  • the alignment referred to here includes adjusting not only the positions in the X direction, the Y direction, and the Z direction, but also the angle around the central axis C1. Therefore, the valve device 50 can be easily attached to the exterior member 20.
  • parallel first and second planes Q1 and Q2 arranged outside the exterior member 20 are provided on the outer peripheral surface of the housing 51 of the valve device 50. Therefore, the valve device 50 can be easily gripped and transported and positioned in the heat sealing process. Therefore, the valve device 50 can be easily attached to the exterior member 20.
  • a parallel portion 72 provided with the first plane Q1 and the second plane Q2 is arranged between the mounting portion 62 and the valve function portion 52.
  • the first plane Q1 and the second plane Q2 are gripped by the gripping portion 92 and arranged on the outside of the packaging materials 15 and 25, so that the valve device 50 can be easily installed and the valve mechanism by the pressing force at the time of gripping. Damage can be prevented.
  • the cross-sectional shape perpendicular to the axial direction of the mounting portion 62 is non-circular, the cross-sectional area of the first passage portion 63a in the mounting portion 62 forming the ventilation path 63 is secured, and the mounting portion 62 in the Y direction The thickness can be reduced. Therefore, the mounting portion 62 can be firmly fixed to the exterior member 20.
  • first wing-shaped portion 68 formed so that the mounting portion 62 becomes thinner toward one side (first direction) in the X direction along the peripheral edge seal portion 21 from the central portion, and the other portion in the X direction (opposite to the first direction). It has a second wing-shaped portion 69 formed thinner toward the second direction).
  • the outer peripheral surface of the mounting portion 62 draws a smooth curved surface on each surface covered with the packaging materials 15 and 25. Therefore, the change in thickness of the peripheral seal portion 21 from the portion that does not sandwich the mounting portion 62 to the portion that sandwiches the mounting portion 62 becomes smooth. Therefore, the mounting portion 62 can be more firmly fixed to the exterior member 20.
  • first plane Q1 and the second plane Q2 are parallel to the X direction (first direction and second direction), the grip portion 92 can be easily moved, and the workability at the time of mounting the valve device 50 can be easily moved. Can be improved.
  • valve device 50 of the power storage device 10 of the electric vehicle 1 of the second to nineteenth embodiments may be provided with the same first and second planes Q1 and Q2 as those of the present embodiment.
  • FIG. 62 shows a side sectional view of the valve device 50 of the power storage device 10 of the electric vehicle 1 of the 21st embodiment.
  • the valve device 50 of the 20th embodiment is a ball spring type check valve capable of repeatedly degassing, but the valve device 50 of the present embodiment constitutes a destructive valve capable of degassing only once. Other parts are the same as those in the 20th embodiment.
  • the valve device 50 includes a breaking valve 57 made of a thin plate or a film that closes the air passage 63.
  • the break valve 57 is formed, for example, by heat-bonding a thin resin plate or a laminated film to the housing 51 so as to cover the exhaust port 51b.
  • the breaking valve 57 may be formed of a thin metal plate such as aluminum and adhered to the housing 51. At this time, as shown in FIG. 63, it is more preferable to form the groove portion 57a radially extending from the vicinity of the center in the fracture valve 57. The groove portion 57a does not penetrate the breaking valve 57 in the thickness direction, and the breaking valve 57 is formed thinner on the groove portion 57a than other portions. In this case, when the pressure inside the exterior member 20 rises, the break valve 57 breaks and opens.
  • the valve device 50 may be a poppet type, a duck building type, an umbrella type, a diaphragm type, or the like. Further, the valve device 50 may be either a check valve or a break valve, and may include both a check valve and a break valve.
  • FIG. 64 shows a bottom view of the valve device 50 of the power storage device 10 of the electric vehicle 1 of the 22nd embodiment.
  • the same parts as those in the 20th embodiment shown in FIGS. 51 to 61 are designated by the same reference numerals.
  • the orientation of the parallel portion 72 of the valve device 50 is different from that of the 20th embodiment.
  • Other parts are the same as those in the 20th embodiment.
  • the housing 51 of the valve device 50 is arranged in the order of the mounting portion 62, the parallel portion 72, and the valve function portion 52 from the inside to the outside of the exterior member 20 as in the twentieth embodiment.
  • the attachment portion 62 is attached to the exterior member 20, and the valve function portion 52 is provided with a valve mechanism inside.
  • the first plane Q1 and the second plane Q2 of the parallel portion 72 are arranged perpendicular to the direction (X direction) in which the peripheral edge seal portion 21 extends (including the case where it is substantially vertical).
  • the curved surfaces Q3 and Q4 connect both ends of the first and second planes Q1 and Q2, respectively, and overlap the outer shape of the valve function portion 52 in the Z direction.
  • the first plane Q1 and the second plane Q2 are arranged outside the exterior member 20 and are perpendicular to the X direction (first direction and second direction). Therefore, the grip portion 92 can be easily moved, and the workability at the time of attaching the valve device 50 can be improved.
  • the first plane Q1 and the second plane Q2 are not limited to parallel or vertical in the X direction, and the workability at the time of mounting the valve device 50 is reduced, but they can be arranged in various directions.
  • valve device 50 of the power storage device 10 of the electric vehicle 1 of the second to nineteenth embodiments may be provided with the same first and second planes Q1 and Q2 as those of the present embodiment.
  • FIG. 65 shows a front view of the valve device 50 of the power storage device 10 of the electric vehicle 1 of the 23rd embodiment.
  • the same parts as those in the 20th embodiment shown in FIGS. 51 to 61 are designated by the same reference numerals.
  • the configuration of the valve device 50 is different from that in the 20th embodiment.
  • Other parts are the same as those in the 20th embodiment.
  • the housing 51 of the valve device 50 is arranged in the order of the mounting portion 62, the valve function portion 52, and the parallel portion 72 from the inside to the outside of the exterior member 20.
  • the mounting portion 62 is mounted on the exterior member 20.
  • the valve function portion 52 is provided with a valve mechanism inside.
  • the parallel portion 72 is provided with a first plane Q1 and a second plane Q2 parallel to the X direction.
  • a parallel portion 72 having the first and second planes Q1 and Q2 is arranged outside the valve function portion 52 having the valve mechanism.
  • the first plane Q1 and the second plane Q2 are gripped by the gripping portion 92 and arranged on the outside of the packaging materials 15 and 25, so that the valve device 50 can be easily installed and the valve mechanism by the pressing force at the time of gripping. Damage can be prevented.
  • first plane Q1 and the second plane Q2 of the parallel portion 72 may be arranged perpendicularly to the direction (X direction) in which the peripheral edge seal portion 21 extends.
  • valve device 50 of the power storage device 10 of the electric vehicle 1 of the second to nineteenth embodiments may be provided with the same first and second planes Q1 and Q2 as those of the present embodiment.
  • FIGS. 66 and 67 show bottom views of the valve device 50 of the power storage device 10 of the electric vehicle 1 of the 24th and 25th embodiments.
  • the same parts as those in the 20th embodiment shown in FIGS. 51 to 61 are designated by the same reference numerals.
  • the shape of the attachment portion 62 of the valve device 50 is different from that in the 20th embodiment.
  • Other parts are the same as those in the 20th embodiment.
  • the housing 51 of the valve device 50 shown in FIG. 66 has a non-circular hexagonal cross-sectional shape perpendicular to the axial direction of the outer shape of the mounting portion 62.
  • the housing 51 of the valve device 50 shown in FIG. 67 is formed in a non-circular quadrangle having a cross-sectional shape perpendicular to the axial direction of the outer shape of the mounting portion 62.
  • the valve device 50 can be easily attached to the exterior member 20. It can.
  • the cross-sectional shape of the mounting portion 62 perpendicular to the axial direction is not limited to a quadrangle or a hexagon, and may be another polygon.
  • FIG. 68 shows a bottom view of the valve device 50 of the power storage device 10 of the electric vehicle 1 of the 26th embodiment.
  • the same parts as those in the 20th embodiment shown in FIGS. 51 to 61 are designated by the same reference numerals.
  • the shape of the mounting portion 62 of the valve device 50 is different from that in the 20th embodiment.
  • Other parts are the same as those in the 20th embodiment.
  • the housing 51 of the valve device 50 is formed with a circular cross-sectional shape perpendicular to the axial direction of the outer shape of the mounting portion 62.
  • the valve device 50 can be easily attached to the exterior member 20. ..
  • the cross-sectional shape of the outer shape of the mounting portion 62 perpendicular to the axial direction may be formed into an elliptical shape whose long axis is parallel to the X direction.
  • FIG. 69 shows a side sectional view of the valve device 50 of the power storage device 10 of the electric vehicle 1 of the 27th embodiment.
  • the same parts as those in the 20th embodiment shown in FIGS. 51 to 61 are designated by the same reference numerals.
  • the structure of the valve device 50 is different from that in the 20th embodiment.
  • Other parts are the same as those in the 20th embodiment.
  • the valve function portion 52 (see FIG. 54) provided with the valve mechanism is integrated with the mounting portion 62, and the valve mechanism is provided in the mounting portion 62.
  • the mounting portion 62 and the parallel portion 72 are arranged in this order from the inside to the outside of the exterior member 20.
  • the mounting portion 62 is mounted on the exterior member 20 and is provided with a valve mechanism inside.
  • the first plane Q1 and the second plane Q2 of the parallel portion 72 are arranged outside the exterior member 20, and are arranged parallel to the direction in which the peripheral edge seal portion 21 extends (X direction).
  • the valve device 50 can be easily attached to the exterior member 20. .. Similar to the 22nd embodiment, the first plane Q1 and the second plane Q2 of the parallel portion 72 may be arranged perpendicularly to the direction (X direction) in which the peripheral edge sealing portion 21 extends.
  • valve mechanism may be damaged by the heat and pressure of the heat seal bar 93 (see FIG. 59) when the exterior member 20 is thermally bonded. For this reason, it is more desirable to dispose the valve mechanism outside the exterior member 20 as in other embodiments.
  • FIG. 70 shows a side sectional view of the valve device 50 of the power storage device 10 of the electric vehicle 1 of the 28th embodiment.
  • the same parts as those in the first embodiment shown in FIGS. 51 to 61 are designated by the same reference numerals.
  • the structure of the valve device 50 is different from that in the 20th embodiment.
  • Other parts are the same as those in the 20th embodiment.
  • the housing 51 of the valve device 50 is provided with first and second planes Q1 and Q2 in a valve function portion 52 (see FIG. 54) provided with a valve mechanism.
  • the mounting portion 62 and the valve function portion 52 are arranged in this order from the inside to the outside of the exterior member 20.
  • the mounting portion 62 is mounted on the exterior member 20.
  • the first plane Q1 and the second plane Q2 of the valve function portion 52 are arranged outside the exterior member 20, and are arranged parallel to the direction in which the peripheral edge seal portion 21 extends (X direction).
  • the valve device 50 can be easily attached to the exterior member 20. .. Similar to the 22nd embodiment, the first plane Q1 and the second plane Q2 of the parallel portion 72 may be arranged perpendicularly to the direction (X direction) in which the peripheral edge sealing portion 21 extends.
  • the first and second planes Q1 and Q2 provided in the parallel portion 72 of the valve device 50 of the 20th to 26th embodiments extend upward into the XY plane passing over the valve mechanism of the valve function portion 52. May be done.
  • the cross-sectional shape perpendicular to the axial direction of the air passage 63 may be formed by a polygon, an ellipse, an oval, or the like.
  • the cross-sectional shape perpendicular to the axial direction of the valve function portion 52 may be formed by a polygon, an ellipse, an oval, or the like.
  • the curved surfaces Q3 and Q4 connecting both ends of the first and second planes Q1 and Q2 may be formed by planes, or may be formed by a plurality of bent planes.
  • the cross-sectional shape perpendicular to the axial direction of the parallel portion 72 or the valve function portion 52 provided with the first and second planes Q1 and Q2 is formed by a polygon such as a quadrangle, a hexagon, or an octagon.
  • valve device 50 of the power storage device 10 of the electric vehicle 1 of the second to nineteenth embodiments may be provided with the same first and second planes Q1 and Q2 as those of the present embodiment.
  • FIGS. 71 and 72 show a front view and a front sectional view of the valve device 50 of the power storage device 10 of the electric vehicle 1 of the 29th embodiment.
  • the same parts as those in the first embodiment shown in FIGS. 1 to 18 are designated by the same reference numerals.
  • the configuration of the valve device 50 is different from that in the first embodiment.
  • Other parts are the same as those in the first embodiment.
  • the valve device 50 includes a valve function portion 52, a gas passage portion 61, and a mounting portion 62.
  • the valve function portion 52, the gas passing portion 61, and the mounting portion 62 may be integrally formed or may be formed separately. If each is composed of a separate body, it becomes possible to select a different material as the material of each part.
  • valve functioning portion 52, the gas passing portion 61 and the mounting portion 62 are arranged in the Z direction, and the mounting portion 62 is arranged below the valve functioning portion 52 via the gas passing portion 61.
  • the outer shapes of the valve function portion 52, the gas passage portion 61, and the mounting portion 62 each have a substantially cylindrical shape having a central axis parallel to the Z direction, and are coaxial with each other.
  • the valve function portion 52 portion of the housing 51 of the valve device 50 is formed in a tubular shape by, for example, metal, resin, or the like.
  • the mounting portion 62 is made of tubular metal, resin, or the like, and is mounted on the exterior member 20. As described above, the mounting portion 62 is preferably made of a material that directly adheres to the innermost layers of the packaging materials 15 and 25. Further, the melting point of the material of the housing 51 of the valve function portion 52 may be higher than the melting point of the material of the mounting portion 62.
  • a corner R may be provided on the inner peripheral surface of the tip of the mounting portion 62.
  • the gas passage portion 61 is formed of a tubular member such as a metal pipe or a resin pipe.
  • the gas passing portion 61 is provided between the mounting portion 62 and the valve functioning portion 52, and is configured to allow the gas that has passed through the mounting portion 62 to pass into the valve functioning portion 52.
  • the length of the gas passing portion 61 in the longitudinal direction is, for example, 10 mm or more.
  • the outer shapes of the valve function portion 52, the gas passing portion 61, and the mounting portion 62 of the valve device 50 are formed to have a circular cross section.
  • the gas passing portion 61 and the mounting portion 62 have a substantially cylindrical shape as a whole, and a ventilation path 63 is formed inside the gas passing portion 61 and the mounting portion 62.
  • the vent 63 extends along the Z direction.
  • the air passage 63 has a circular cross section.
  • the radial thicknesses of the gas passing portion 61 and the mounting portion 62 are substantially constant along the circumferential direction.
  • the outer diameter of the valve function portion 52 is larger than the outer diameter of the gas passing portion 61 and the mounting portion 62. That is, when the valve device 50 is viewed in the Z direction, the valve function portion 52 protrudes from the outer shapes of the gas passing portion 61 and the mounting portion 62 in each direction including the depth direction of the storage portion 16 (see FIG. 6). .. As a result, a step 51c is formed at the boundary between the valve function portion 52 and the gas passage portion 61. Due to this step 51c, the valve device 50 has a shape that is discontinuously widened from the gas passing portion 61 toward the valve function portion 52.
  • the tubular gas passage portion 61 is derived from the valve function portion 52 having the valve mechanism, and the valve function portion 52 is widened with respect to the gas passage portion 61. Therefore, the gas passage portion 61 only needs to have a minimum outer diameter for forming the ventilation passage 63 having the required cross-sectional area, and the weight of the power storage device pack 5 provided with the valve device 50 is reduced. ..
  • the gas passing portion 61 led out from the housing 51 does not necessarily have to be linear, and may be, for example, L-shaped.
  • the valve device 50 releases the gas in the exterior member 20 to the outside when the pressure in the exterior member 20 exceeds a predetermined value due to the gas generated in the exterior member 20. It is configured. If the sealing performance of the valve device 50 is higher than necessary, the valve device 50 may not function even if the pressure inside the exterior member 20 exceeds a predetermined value. On the other hand, when the sealing property of the valve device 50 is lower than necessary, water vapor (moisture) can enter the exterior member 20 from the external environment in normal times (when the pressure inside the exterior member 20 is less than a predetermined value). Highly sex.
  • both the high degree of sealing performance of the valve device 50 and the high degree of suppression of the intrusion of water vapor into the exterior member 20 are achieved.
  • the valve device 50-2 is measured in accordance with the method specified in the "vacuum spraying method (spray method)" in the “helium leakage test method” of JIS Z2331: 2006.
  • the amount of helium leak from the secondary side to the primary side is 5.0 ⁇ 10 -11 Pa ⁇ m 3 / sec or more and 5.0 ⁇ 10 -6 Pa ⁇ m 3 / sec or less.
  • the secondary side of the valve device 50 refers to the outside of the exterior member 20 when the valve device 50 is attached to the exterior member 20. Further, the primary side of the valve device 50 indicates the inside of the exterior member 20 when the valve device 50 is attached to the exterior member 20.
  • the upper limit of the amount of helium leak is preferably about 4.5 ⁇ 10 -6 Pa ⁇ m 3 / sec or less, more preferably about 1.0 ⁇ 10 -6 Pa ⁇ m 3 / sec or less, and further. It is preferably about 1.0 ⁇ 10 -7 Pa ⁇ m 3 / sec or less, and more preferably about 1.0 ⁇ 10 -8 Pa ⁇ m 3 / sec or less.
  • the preferable range of the helium leak amount is about 5.0 ⁇ 10 -11 Pa ⁇ m 3 / sec to 4.5 ⁇ 10 -6 Pa ⁇ m 3 / sec, 5.0 ⁇ 10 -11 Pa ⁇ m. From 3 / sec to 1.0 ⁇ 10 -6 Pa ⁇ m 3 / sec, 5.0 ⁇ 10 -11 Pa ⁇ m 3 / sec to 1.0 ⁇ 10 -7 Pa ⁇ m 3 / sec, 5. From 0 ⁇ 10 -11 Pa ⁇ m 3 / sec to 1.0 ⁇ 10 -8 Pa ⁇ m 3 / sec.
  • the amount of helium leak satisfies the above upper limit
  • the invasion of water vapor (moisture) from the external environment into the exterior member 20 can be highly suppressed.
  • the amount of helium leak satisfies the above lower limit
  • the gas can be released to the outside when the gas is generated in the exterior member 20. If the amount of helium leak is too small, it is difficult to stably release the gas generated in the exterior member 20 to the outside of the exterior member 20.
  • the power storage device 10 is used continuously without opening the valve device 50 for a long period of time, there is a high possibility that the valve device 50 will not be properly opened even when the internal pressure rises to the design value.
  • the valve in the device 50 the helium leakage amount is 5.0 ⁇ 10 -11 Pa ⁇ m 3 / sec from 2.0 ⁇ 10 -10 Pa ⁇ m 3 / sec in the range of about news 5.0 ⁇ 10 -
  • the range is set from 11 Pa ⁇ m 3 / sec to 1.5 ⁇ 10 -10 Pa ⁇ m 3 / sec
  • the intrusion of water vapor (moisture) from the external environment into the exterior member 20 is particularly highly advanced. It can be suppressed.
  • the shape of the portion where the valve seat 51a of the valve mechanism and the ball 54 are in contact with each other is extremely accurate at a high level which is not performed by the conventional check valve. It is necessary to design and process it high.
  • the helium leak test uses a helium leak detector as a test device. Further, the gas valve (valve function unit 52) of the valve device 50 is installed on a leak test jig (a jig confirmed that there is no helium leak when a dummy valve device in which the gas valve is blocked is inserted). Then, install it in the helium leak detector via the test port. Make sure there is no helium leak between the jig and the helium leak detector.
  • the differential pressure between the primary side and the secondary side is preferably about 0.05 MPa or more, more preferably about 0.1 MPa or more as the lower limit. ..
  • the upper limit is preferably about 1 MPa or less, more preferably about 0.3 MPa or less.
  • preferred ranges include about 0.05 to 1 MPa, about 0.05 to 0.3 MPa, about 0.1 to 1 MPa, and about 0.1 to 0.3 MPa.
  • the gas when gas is generated inside the exterior member 20, the gas can be suitably released to the outside, and water vapor (moisture) from the external environment can enter. It can be highly suppressed.
  • the internal set pressure of the power storage device 10 (exterior member 20) to which the valve device 50 is attached is preferably set to a constant pressure or less.
  • the set value of the internal pressure is appropriately set according to the type of the package with the valve device, but is preferably about 0.1 MPa or less, more preferably about 1.0 ⁇ 10 ⁇ 2 MPa or less.
  • As the lower limit for example, about 1.0 ⁇ 10 -10 MPa or more can be mentioned.
  • preferable ranges of the internal pressure include about 1.0 ⁇ 10 -10 to 0.1 MPa and about 1.0 ⁇ 10 -10 to 1.0 ⁇ 10 ⁇ 2 MPa.
  • the amount of helium leak can be set by a known method.
  • the material, shape, size, and further of the spring 56 of the members for example, the ball 54, the valve seat 51a, the spring 56, and the exhaust port 51b constituting the valve function portion 52 (valve mechanism) of the valve device 50.
  • the amount of helium leak can be adjusted by designing the force for pressing the ball 54 or the like.
  • the amount of helium leak is 5.0 ⁇ 10 -11 Pa ⁇ m 3 / sec. As described above, it becomes easy to set the range of 5.0 ⁇ 10 -6 Pa ⁇ m 3 / sec or less.
  • the valve in the apparatus 50 the helium leakage amount of 5.0 ⁇ 10 -11 Pa ⁇ m 3 / sec from 2.0 ⁇ 10 -10 Pa ⁇ m 3 / sec in the range of about news 5.0 ⁇ 10 -
  • the valve of the valve mechanism is at a high level, which is not possible with conventional check valves. It is necessary to design and process the shape of the portion where the seat 51a and the ball 54 are in contact with each other with extremely high accuracy.
  • the surface contact roughness of the valve seat 51a with the ball 54 and the surface average roughness of the ball 54 surface is effective to set to 20 ⁇ m or less, preferably 5 ⁇ m or less, and more preferably 1 ⁇ m or less.
  • the valve device 50 does not operate properly (the valve function portion 52 does not open) when the objects with too high precision are brought into contact with each other. Therefore, the surface roughness needs to be adjusted so that the amount of helium leak is within the above range.
  • FIG. 73 shows a side sectional view of the power storage device pack 5.
  • a plurality of power storage devices 10 are arranged side by side in the Y direction and housed in the outer container 6.
  • a plurality of power storage devices 10 may be arranged side by side in the outer container 6 so as to be in direct contact with each other, or members may be sandwiched between the power storage devices 10 and arranged side by side.
  • the outer container 6 is formed with a hole (not shown) through which the valve device 50 of each power storage device 10 penetrates. At least the valve function portion 52 of the valve device 50 projects from the hole to the outside of the outer container 6. That is, in each valve device 50, the length of the gas passage portion 61 in the longitudinal direction is secured so that the valve function portion 52 is located outside the outer circumference of the outer container 6.
  • the length of the power storage device 10 in the Y direction is shorter than the length of the valve function unit 52 in the Y direction, if the power storage devices 10 are arranged in the Y direction, the adjacent valve function units 52 interfere with each other. At this time, since the length of the gas passing portion 61 in the longitudinal direction is secured to some extent, the plurality of valve devices 50 spread in a fan shape. As a result, the power storage devices 10 can be arranged with the exterior members 20 in contact with each other. Therefore, when the length of the valve function portion 52 in the Y direction is long, it is possible to suppress the increase in size of the power storage device pack 5.
  • the valve device 50 has a gas passing portion 61 between the mounting portion 62 and the valve function 52, and the valve function 52 is located outside the outer circumference of the exterior member 20.
  • the gas released from the valve device 50 is released at a position away from the exterior member 20, so that it is difficult to hit the exterior member 20. Therefore, deterioration of the outer layer of the exterior member 20 can be suppressed.
  • the length of the gas passing portion is 10 mm or more, it is possible to easily realize the power storage device 10 in which the valve function 52 is located outside the outer circumference of the exterior member 20.
  • the place where the gas is discharged can be controlled by the valve device 50.
  • valve device 50 helium leak amount is set to 5.0 ⁇ 10 -11 Pa ⁇ m 3 / sec or more and 5.0 ⁇ 10 -6 Pa ⁇ m 3 / sec or less.
  • the valve device 50 can reliably exhaust the air.
  • valve device 50 of the power storage device 10 of the electric vehicle 1 of the second to 28th embodiments may be provided with the same gas passing portion 61 as that of the present embodiment.
  • FIG. 74 shows a side sectional view of the power storage device pack 5 of the electric vehicle 1 according to the thirtieth embodiment.
  • the same parts as those in the 29th embodiment shown in FIGS. 71 to 73 are designated by the same reference numerals.
  • the structure of the valve device 50 is different from that in the 29th embodiment.
  • Other parts are the same as those in the 29th embodiment.
  • valve devices 50 the same number of valve devices 50 as the power storage devices 10 included in the power storage device pack 5 are used. Therefore, as the number of valve devices 50 increases, there is a high possibility that water vapor (moisture) invades from the secondary side to the primary side of the valve devices 50 in normal times. In other words, the amount of water that penetrates into one power storage device 10 increases. Further, as the number of valve devices 50 increases, the cost of the power storage device pack 5 increases. On the other hand, in this embodiment, one valve device 50 is provided for a plurality of power storage devices 10.
  • the power storage device pack 5 includes a plurality of power storage devices 10 and an outer container 6. In the power storage device pack 5, only one valve device 50 is provided for the plurality of power storage devices 10.
  • FIG. 75 shows a top view of the valve device 50
  • FIG. 76 shows a WW sectional view of FIG. 75
  • the valve device 50 includes a valve function 52, a plurality of gas passing portions 61, and a plurality of mounting portions 62.
  • the gas passing portion 61 includes a gas passing portion 61a, a gas passing portion 61b, a gas passing portion 61c, and a gas passing portion 61d.
  • the valve function 52, the gas passing portion 61, and the mounting portion 62 may be integrally configured or may be configured separately.
  • the valve function 52 is provided with a valve mechanism similar to the above in a housing 51 made of, for example, metal, resin, or the like. Vent passages 51e are formed in a plurality of (four in FIG. 76) in the housing 51 at the lower end of the valve function 52. Gas passing portions 61 (61a to 61d) are connected to each of the ventilation passages 51e, and mounting portions 62 are continuously provided in each of the gas passing portions 61 (61a to 61d). Each mounting portion 62 is mounted on each power storage device 10. The shape of each gas passing portion 61 is appropriately set according to the position of the power storage device 10 to be attached in the power storage device pack 5.
  • valve device 50 is provided with a plurality of attachment portions 62 attached to the plurality of power storage devices 10 by branching from one valve function 52.
  • the helium leak amount of the valve function 52 (valve device 50) is the same as the helium leak amount of the valve device 50 of the 29th embodiment.
  • the gas guided in the mounting portion 62 and the gas passage portion 61 presses the ball 54 toward the exhaust port 51b.
  • the gas in the power storage device 10 passes through the gap formed between the ball 54 and the valve seat 51a.
  • the gas passing between the ball 54 and the valve seat 51a permeates the membrane 58 and is discharged to the outside of the power storage device pack 5 from the exhaust port 51b.
  • the valve device 50 is provided with a plurality of attachment portions 62 attached to the plurality of power storage devices 10 by branching from one valve function 52.
  • the number of valve functions 52 of the power storage device pack 5 is reduced, so that the possibility that water vapor infiltrates into the power storage device 10 through a minute gap in the valve device 50 can be reduced. In other words, the amount of water that penetrates into one power storage device 10 can be reduced.
  • the cost of the power storage device pack 5 can be suppressed.
  • the desiccant may be held inside the gas passing portion 61.
  • a desiccant such as silica is held on the inner wall surface of the gas passage portion 61, the influence of the water vapor can be reduced when water vapor invades from the secondary side to the primary side of the valve device 50.
  • the gas passage portion 61 may be composed of, for example, a flexible tube having flexibility that allows bending and stretching. As a result, the gas discharge location can be adjusted more freely.
  • valve device 50 of the power storage device 10 of the electric vehicle 1 of the second to 28th embodiments may be provided with the same gas passing portion 61 as that of the present embodiment.
  • the positional relationship between the valve device 50 and the electrode terminals 12 and 13 can be changed.
  • the valve device 50 may be attached to the upper side of the exterior member 20, the valve device 50 may be attached to the side side of the exterior member 20 facing the X direction. That is, the valve device 50 may be attached to any of the three sides of the exterior member 20 excluding the bottom of one end in the Y direction.
  • the electrode terminals 12 and 13 are arranged on both sides facing the X direction and the valve device 50 is provided on the same side as one of the electrode terminals 12 and 13, the height of the power storage device pack 5 can be suppressed. it can.
  • both electrode terminals 12 and 13 may be arranged on the same side of the peripheral edge of the exterior member 20, and the valve device 50 may be arranged between the two electrode terminals 12 and 13. Further, both electrode terminals 12 and 13 may be arranged on the same side of the peripheral edge of the exterior member 20, and the valve device may be arranged on a side other than the side on which the electrode terminals 12 and 13 are arranged.
  • the outer container 6 of the power storage device pack 5 may be placed on a mounting member having a temperature adjusting function.
  • the mounting member can be formed of a metal plate to dissipate heat from the power storage device pack 5 and suppress a temperature rise of the power storage device 10. At this time, circulating water may be circulated to the mounting member.
  • a heater may be provided on the mounting member, and the power storage device 10 may be maintained at an appropriate temperature by turning the heater on and off.
  • the outer container 6 of the power storage device pack 5 may be placed on a mounting member formed of a liquid absorbent material.
  • the mounting member is made of a non-woven fabric, and when the electrolytic solution leaks from the power storage device pack 5, it can be absorbed by the mounting member.
  • the power storage device 10 for supplying electric power to the drive motor 3 is composed of a secondary battery, it may be a capacitor such as an electric double layer capacitor (EDLC) or a lithium ion capacitor.
  • EDLC electric double layer capacitor
  • gas may be generated in the exterior member 20 due to a chemical reaction in the capacitor.
  • the present invention can be widely used in an electric vehicle equipped with a power storage device.

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Abstract

An electricity storage device 10 has an electricity storage element 11 encapsulated in an exterior member 20 of a stacked body including a thermally adhesive resin layer 38, and is installed as a drive source in an electric vehicle 1, wherein: the exterior member 20 has a peripheral edge seal part 21, and a housing part 16 that is formed at a predetermined depth from the inner edge of the peripheral edge seal part 21 and that houses the electricity storage element 11; and a depth direction (Z direction) of the housing part 16 and an X direction thereof which is orthogonal to the depth direction are in the front-back direction or the left-right direction of the electric vehicle 1, and a depth direction (Z direction) of the housing part 16 and a Y direction thereof which is perpendicular to the X direction are in the height direction of the electric vehicle 1. Furthermore, a valve device 50 that enables communication between the housing part 16 and an external space is attached to the exterior member 20 at the peripheral edge seal part 21.

Description

蓄電デバイス、蓄電デバイス集合体、電動自動車及び蓄電デバイスの製造方法Manufacturing method of power storage device, power storage device assembly, electric vehicle and power storage device

　本発明は、電動自動車に搭載される蓄電デバイス及びその製造方法に関する。また本発明は蓄電デバイスを用いた蓄電デバイス集合体及び電動自動車に関する。 The present invention relates to a power storage device mounted on an electric vehicle and a method for manufacturing the same. The present invention also relates to an assembly of power storage devices using a power storage device and an electric vehicle.

　近年、環境対策や省資源化等の観点から、駆動力の少なくとも一部をモータが供給する電動自動車が注目されている。この電動自動車には、電気自動車（ＥＶ）、ハイブリッド自動車（ＨＥＶ）、プラグインハイブリッド自動車（ＰＨＥＶ）等がある。電気自動車はモータのみを動力源とし、ハイブリッド自動車及びプラグインハイブリッド自動車はモータ及びエンジンを動力源とする。 In recent years, from the viewpoint of environmental measures and resource saving, electric vehicles in which a motor supplies at least a part of the driving force have been attracting attention. The electric vehicle includes an electric vehicle (EV), a hybrid vehicle (HEV), a plug-in hybrid vehicle (PHEV), and the like. Electric vehicles are powered only by motors, and hybrid vehicles and plug-in hybrid vehicles are powered by motors and engines.

　電動自動車に搭載される従来の蓄電デバイスは特許文献１に開示される。この蓄電デバイスは電池素子を外装部材により覆う平面視矩形の薄型二次電池から成っている。電池素子はセパレータを介して正極板と負極板とを対向配置し、正極板と負極板との間には電解質が配される。外装部材は金属箔を有した２つの積層体を熱接着性樹脂層により熱接着して電池素子を封入する。この時、正極板及び負極板にそれぞれ接続される端子が外装部材から突出する。 A conventional power storage device mounted on an electric vehicle is disclosed in Patent Document 1. This power storage device consists of a thin secondary battery having a rectangular shape in a plan view in which the battery element is covered with an exterior member. In the battery element, the positive electrode plate and the negative electrode plate are arranged to face each other via a separator, and an electrolyte is arranged between the positive electrode plate and the negative electrode plate. As for the exterior member, two laminates having metal foils are heat-bonded by a thermosetting resin layer to enclose the battery element. At this time, the terminals connected to the positive electrode plate and the negative electrode plate respectively protrude from the exterior member.

　蓄電デバイスは厚さ方向に積み重ねられるとともに平面視矩形の短手方向に並設され、複数の蓄電デバイスから成る組電池が形成される。また組電池は蓄電デバイスの厚さ方向に積み重ねられ、複数の組電池から成る複合組電池が電動自動車のフロア下に設置される。 The power storage devices are stacked in the thickness direction and arranged side by side in the lateral direction of the rectangular shape in a plan view to form an assembled battery composed of a plurality of power storage devices. In addition, the assembled batteries are stacked in the thickness direction of the power storage device, and the composite assembled battery composed of a plurality of assembled batteries is installed under the floor of the electric vehicle.

特許第３７１９２３５号公報（第４頁～第１１頁、第７図）Japanese Patent No. 3719235 (pages 4 to 11, FIG. 7)

　しかしながら、上記従来の蓄電デバイスによると、車載時に高さ方向に積み重ねられるため下方の蓄電デバイスに上方の蓄電デバイスの重量が加わる。これにより、積層体から成る外装部材が変形し、車の振動等によって加重が大きくなると外装部材が破損する場合がある。このため、蓄電デバイス及び電動自動車の信頼性が低下する問題があった。 However, according to the above-mentioned conventional power storage device, the weight of the upper power storage device is added to the lower power storage device because they are stacked in the height direction when mounted on a vehicle. As a result, the exterior member made of the laminated body is deformed, and the exterior member may be damaged when the load is increased due to vibration of the vehicle or the like. Therefore, there is a problem that the reliability of the power storage device and the electric vehicle is lowered.

　本発明は、信頼性を向上できる蓄電デバイス、蓄電デバイス集合体及び電動自動車を提供することを目的とする。また本発明は信頼性を向上できる蓄電デバイスの製造方法を提供することを目的とする。 An object of the present invention is to provide a power storage device, a power storage device assembly, and an electric vehicle capable of improving reliability. Another object of the present invention is to provide a method for manufacturing a power storage device capable of improving reliability.

　上記目的を達成するために本発明は、　熱接着性樹脂層を有する積層体の外装部材に蓄電素子を封入し、電動自動車に駆動源として搭載される蓄電デバイスにおいて、前記外装部材が対向する前記熱接着性樹脂層を互いに熱接着した周縁シール部と、前記周縁シール部に対して所定の深さで形成されるとともに前記蓄電素子を収納する収納部とを有し、前記収納部の深さ方向及び前記収納部の深さ方向に直交する第１方向が電動自動車の前後方向または左右方向に配置されるとともに、前記収納部の深さ方向及び前記第１方向に直交する第２方向が電動自動車の高さ方向に配置され、
　少なくとも部分的に前記周縁シール部において前記外装部材に取り付けられるともに、前記収納部と外部空間とを連通可能にする弁装置を更に備えたことを特徴としている。 In order to achieve the above object, the present invention relates to a power storage device in which a power storage element is enclosed in an exterior member of a laminate having a heat-adhesive resin layer and mounted as a drive source in an electric vehicle, wherein the exterior member faces the outer member. It has a peripheral seal portion in which heat-adhesive resin layers are heat-bonded to each other, and a storage portion formed at a predetermined depth with respect to the peripheral seal portion and accommodating the power storage element, and the depth of the storage portion. The first direction orthogonal to the direction and the depth direction of the storage portion is arranged in the front-rear direction or the left-right direction of the electric vehicle, and the depth direction of the storage portion and the second direction orthogonal to the first direction are electric. Arranged in the height direction of the car,
It is characterized in that it is attached to the exterior member at least partially at the peripheral seal portion, and is further provided with a valve device that enables communication between the storage portion and the external space.

　また本発明は上記構成の蓄電デバイスにおいて、前記弁装置は、前記外装部材の内部において発生したガスに起因して前記外装部材の内部の圧力が上昇した場合に該圧力を低下させる弁機構を内部に形成された第１部分と、前記収納部において発生したガスを前記弁機構に誘導する通気路を内部に形成された第２部分とを有し、
　前記第２部分の内端が前記周縁シール部の内側端縁から前記収納部に向かう方向に突出することを特徴としている。 Further, in the power storage device having the above configuration, the valve device includes a valve mechanism that reduces the pressure inside the exterior member when the pressure inside the exterior member rises due to the gas generated inside the exterior member. It has a first portion formed in the above and a second portion formed inside a ventilation path for guiding the gas generated in the storage portion to the valve mechanism.
The inner end of the second portion protrudes from the inner edge of the peripheral edge seal portion in the direction toward the accommodating portion.

　また本発明は上記構成の蓄電デバイスにおいて、前記収納部が前記周縁シール部の前記内側端縁よりも内側に配置され、前記第２部分の内端が前記収納部の外側端縁よりも内側に位置することを特徴としている。 Further, in the power storage device having the above configuration, the storage portion is arranged inside the inner edge of the peripheral seal portion, and the inner end of the second portion is inside the outer edge of the storage portion. It is characterized by being located.

　また本発明は上記構成の蓄電デバイスにおいて、前記通気路の延びる方向に沿って視たときに、前記第１部分の外形は前記第２部分の外形から前記収納部の深さ方向においてはみ出していることを特徴としている。 Further, in the power storage device having the above configuration, when viewed along the extending direction of the ventilation path, the outer shape of the first portion protrudes from the outer shape of the second portion in the depth direction of the storage portion. It is characterized by that.

　また本発明は上記構成の蓄電デバイスにおいて、前記第１部分は前記周縁シール部の外側端縁よりも外側に位置することを特徴としている。 Further, the present invention is characterized in that, in the power storage device having the above configuration, the first portion is located outside the outer edge of the peripheral edge seal portion.

　また本発明は上記構成の蓄電デバイスにおいて、前記第１部分は前記第２部分よりも前記通気路の延びる方向に直交する断面における断面積が大きいことを特徴としている。 Further, the present invention is characterized in that, in the power storage device having the above configuration, the first portion has a larger cross-sectional area in a cross section orthogonal to the extending direction of the air passage than the second portion.

　また本発明は上記構成の蓄電デバイスにおいて、前記弁装置は、前記外装部材の内部において発生したガスに起因して前記外装部材の内部の圧力が上昇した場合に該圧力を低下させる弁機構を内部に形成された第１部分と、前記収納部において発生したガスを前記弁機構に誘導する通気路を内部に形成された第２部分とを有し、
　前記第１部分は前記周縁シール部の外側の端縁よりも外側に位置しており、前記第２部分の少なくとも一部は前記周縁シール部において前記熱接着性樹脂層に挟まれ、
　前記収納部の深さ方向において、前記第１部分の長さは前記第２部分の長さよりも長く、前記第１部分と前記第２部分との境界には段差が形成されていることを特徴としている。 Further, in the power storage device having the above configuration, the valve device includes a valve mechanism that reduces the pressure inside the exterior member when the pressure inside the exterior member rises due to the gas generated inside the exterior member. It has a first portion formed in the above and a second portion formed inside a ventilation path for guiding the gas generated in the storage portion to the valve mechanism.
The first portion is located outside the outer edge of the peripheral edge seal portion, and at least a part of the second portion is sandwiched between the thermosetting resin layers in the peripheral edge seal portion.
In the depth direction of the storage portion, the length of the first portion is longer than the length of the second portion, and a step is formed at the boundary between the first portion and the second portion. It is said.

　また本発明は上記構成の蓄電デバイスにおいて、前記第１方向の前記第２部分の長さは、前記収納部の深さ方向の前記第２部分の長さよりも長いことを特徴としている。 Further, the present invention is characterized in that, in the power storage device having the above configuration, the length of the second portion in the first direction is longer than the length of the second portion in the depth direction of the storage portion.

　また本発明は上記構成の蓄電デバイスにおいて、前記弁装置は、前記外装部材の内部において発生したガスに起因して前記外装部材の内部の圧力が上昇した場合に該圧力を低下させる弁機構を内部に形成された第１部分と、前記収納部において発生したガスを前記弁機構に誘導する通気路を内部に形成された第２部分とを有し、
　前記第１部分は前記周縁シール部の外側の端縁よりも外側に位置しており、前記第２部分の少なくとも一部は前記周縁シール部において前記熱接着性樹脂層に挟まれ、
　前記第１方向の前記第２部分の長さは、前記収納部の深さ方向の前記第２部分の長さよりも長いことを特徴としている。 Further, in the power storage device having the above configuration, the valve device includes a valve mechanism that reduces the pressure inside the exterior member when the pressure inside the exterior member rises due to the gas generated inside the exterior member. It has a first portion formed in the above and a second portion formed inside a ventilation path for guiding the gas generated in the storage portion to the valve mechanism.
The first portion is located outside the outer edge of the peripheral edge seal portion, and at least a part of the second portion is sandwiched between the thermosetting resin layers in the peripheral edge seal portion.
The length of the second portion in the first direction is longer than the length of the second portion in the depth direction of the storage portion.

　また本発明は上記構成の蓄電デバイスにおいて、前記弁装置は、前記外装部材の内部において発生したガスに起因して前記外装部材の内部の圧力が上昇した場合に該圧力を低下させる弁機構を内部に形成された第１部分と、前記収納部において発生したガスを前記弁機構に誘導する通気路を内部に形成された第２部分とを有し、
　前記第１部分は前記周縁シール部の外側の端縁よりも外側に位置しており、前記第２部分の少なくとも一部は前記周縁シール部において前記熱接着性樹脂層に挟まれ、
　前記第２部分は前記第１方向の端部に近づくほど薄く形成された翼状延端部を有することを特徴としている。 Further, in the power storage device having the above configuration, the valve device includes a valve mechanism that reduces the pressure inside the exterior member when the pressure inside the exterior member rises due to the gas generated inside the exterior member. It has a first portion formed in the above and a second portion formed inside a ventilation path for guiding the gas generated in the storage portion to the valve mechanism.
The first portion is located outside the outer edge of the peripheral edge seal portion, and at least a part of the second portion is sandwiched between the thermosetting resin layers in the peripheral edge seal portion.
The second portion is characterized by having a wing-shaped extension portion formed thinner as it approaches the end portion in the first direction.

　また本発明は上記構成の蓄電デバイスにおいて、前記弁装置は、前記外装部材の内部において発生したガスに起因して前記外装部材の内部の圧力が上昇した場合に該圧力を低下させる弁機構を内部に形成された第１部分と、前記収納部において発生したガスを前記弁機構に誘導する通気路を内部に形成された第２部分とを有し、
　前記第１部分は前記周縁シール部の外側の端縁よりも外側に位置しており、前記第２部分の少なくとも一部は前記周縁シール部において前記熱接着性樹脂層に挟まれ、
　前記第２部分の外表面には、周方向に延びる凸条部が少なくとも１つ形成されていることを特徴としている。 Further, in the power storage device having the above configuration, the valve device includes a valve mechanism that reduces the pressure inside the exterior member when the pressure inside the exterior member rises due to the gas generated inside the exterior member. It has a first portion formed in the above and a second portion formed inside a ventilation path for guiding the gas generated in the storage portion to the valve mechanism.
The first portion is located outside the outer edge of the peripheral edge seal portion, and at least a part of the second portion is sandwiched between the thermosetting resin layers in the peripheral edge seal portion.
The outer surface of the second portion is characterized in that at least one convex portion extending in the circumferential direction is formed.

　また本発明は上記構成の蓄電デバイスにおいて、前記通気路の断面形状は円形であることを特徴としている。 Further, the present invention is characterized in that, in the power storage device having the above configuration, the cross-sectional shape of the ventilation path is circular.

　また本発明は上記構成の蓄電デバイスにおいて、前記第１方向の前記通気路の長さは、前記収納部の深さ方向の前記通気路の長さよりも長いことを特徴としている。 Further, the present invention is characterized in that, in the power storage device having the above configuration, the length of the ventilation path in the first direction is longer than the length of the ventilation path in the depth direction of the storage portion.

　また本発明は上記構成の蓄電デバイスにおいて、前記第２部分において、前記第１部分側とは反対側の端部の外周側の角が丸みを帯びていることを特徴としている。 Further, the present invention is characterized in that, in the power storage device having the above configuration, in the second part, the corners on the outer peripheral side of the end portion opposite to the first part side are rounded.

　また本発明は上記構成の蓄電デバイスにおいて、前記第２部分は、前記通気路内に形成されたピラーを有することを特徴としている。 Further, the present invention is characterized in that, in the power storage device having the above configuration, the second portion has a pillar formed in the air passage.

　また本発明は上記構成の蓄電デバイスにおいて、前記第２部分の外表面は梨地であることを特徴としている。 Further, the present invention is characterized in that, in the power storage device having the above configuration, the outer surface of the second portion is satin finished.

　また本発明は上記構成の蓄電デバイスにおいて、前記第２部分は前記通気路の中心軸に直交する断面の外形を多角形に形成され、前記多角形の角が丸みを帯びていることを特徴としている。 Further, the present invention is characterized in that, in the power storage device having the above configuration, the second portion has a polygonal outer shape of a cross section orthogonal to the central axis of the air passage, and the corners of the polygon are rounded. There is.

　また本発明は上記構成の蓄電デバイスにおいて、前記第１部分及び前記第２部分の少なくとも一方の外表面の少なくとも一部に平面が形成されていることを特徴としている。 Further, the present invention is characterized in that, in the power storage device having the above configuration, a flat surface is formed on at least a part of the outer surface of at least one of the first portion and the second portion.

　また本発明は上記構成の蓄電デバイスにおいて、前記第１部分及び前記第２部分は異なる材料で構成されており、前記第１部分の材料の融点が前記第２部分の材料の融点よりも高いことを特徴としている。 Further, in the power storage device having the above configuration, the first part and the second part are made of different materials, and the melting point of the material of the first part is higher than the melting point of the material of the second part. It is characterized by.

　また本発明は上記構成の蓄電デバイスにおいて、前記弁装置は、前記外装部材の内部において発生したガスに起因して前記外装部材の内部の圧力が上昇した場合に該圧力を低下させる弁機構を内部に形成された第１部分と、前記収納部において発生したガスを前記弁機構に誘導する通気路を内部に形成された第２部分とを有し、
　前記弁装置の内端は前記収納部の外側端縁よりも外側に位置し、前記通気路の延びる方向に沿って視たときに、前記第１部分の外形は前記第２部分の外形から前記収納部の深さ方向においてはみ出していることを特徴としている。 Further, in the power storage device having the above configuration, the valve device includes a valve mechanism that reduces the pressure inside the exterior member when the pressure inside the exterior member rises due to the gas generated inside the exterior member. It has a first portion formed in the above and a second portion formed inside a ventilation path for guiding the gas generated in the storage portion to the valve mechanism.
The inner end of the valve device is located outside the outer edge of the storage portion, and when viewed along the extending direction of the air passage, the outer shape of the first portion is the same as the outer shape of the second portion. The feature is that it protrudes in the depth direction of the storage part.

　また本発明は上記構成の蓄電デバイスにおいて、前記弁装置は、前記外装部材の内部において発生したガスに起因して前記外装部材の内部の圧力が上昇した場合に該圧力を低下させる弁機構を内部に形成された第１部分と、前記収納部において発生したガスを前記弁機構に誘導する通気路を内部に形成された第２部分とを有し、
　前記弁装置の内端は前記収納部の外側端縁よりも外側に位置し、前記第１部分は前記第２部分よりも前記通気路の延びる方向に直交する断面における断面積が大きいことを特徴としている。 Further, in the power storage device having the above configuration, the valve device includes a valve mechanism that reduces the pressure inside the exterior member when the pressure inside the exterior member rises due to the gas generated inside the exterior member. It has a first portion formed in the above and a second portion formed inside a ventilation path for guiding the gas generated in the storage portion to the valve mechanism.
The inner end of the valve device is located outside the outer edge of the accommodating portion, and the first portion has a larger cross-sectional area than the second portion in a cross section orthogonal to the extending direction of the air passage. It is said.

　また本発明は上記構成の蓄電デバイスにおいて、前記通気路の延びる方向に沿って視たときに、前記第１部分の外形は前記第２部分の外形から前記収納部の深さ方向においてはみ出していることを特徴としている。 Further, in the power storage device having the above configuration, when viewed along the extending direction of the ventilation path, the outer shape of the first portion protrudes from the outer shape of the second portion in the depth direction of the storage portion. It is characterized by that.

　また本発明は上記構成の蓄電デバイスにおいて、前記弁装置の内端は、少なくとも前記周縁シール部の内側端縁まで達していることを特徴としている。 Further, the present invention is characterized in that, in the power storage device having the above configuration, the inner end of the valve device reaches at least the inner end edge of the peripheral seal portion.

　また本発明は上記構成の蓄電デバイスにおいて、前記第１部分は前記周縁シール部の外側端縁よりも外側に位置することを特徴としている。 Further, the present invention is characterized in that, in the power storage device having the above configuration, the first portion is located outside the outer edge of the peripheral edge seal portion.

　また本発明は上記構成の蓄電デバイスにおいて、前記弁装置の内端は、前記周縁シール部の内側端縁から前記収納部に向かって突出していることを特徴としている。 Further, the present invention is characterized in that, in the power storage device having the above configuration, the inner end of the valve device protrudes from the inner edge of the peripheral edge seal portion toward the storage portion.

　また本発明は上記構成の蓄電デバイスにおいて、前記周縁シール部の内側端縁は前記弁装置の近傍に位置して前記弁装置と交差する第１ラインと、前記周縁シール部の内側端縁の延びる方向に沿って前記第１ラインの両側にそれぞれ隣接する第２ライン及び第３ラインとを含み、前記第１ラインは、前記第２ライン及び前記第３ラインよりも外側に位置することを特徴としている。 Further, in the power storage device having the above configuration, the inner edge of the peripheral edge seal portion extends in the vicinity of the valve device and intersects with the valve device, and the inner edge of the peripheral edge seal portion extends. A second line and a third line adjacent to each side of the first line along the direction are included, and the first line is located outside the second line and the third line, respectively. There is.

　また本発明は上記構成の蓄電デバイスにおいて、前記弁装置は、前記周縁シール部の外側の端縁よりも外側に位置している第１部分と、前記周縁シール部において前記熱接着性樹脂層に挟まれている第２部分とを含み、前記周縁シール部は、前記第２部分を前記熱接着性樹脂層によって挟む挟持部分の外表面に凹凸を形成されていることを特徴としている。 Further, in the power storage device having the above configuration, the valve device is attached to the first portion located outside the outer edge of the peripheral edge seal portion and the thermosetting resin layer in the peripheral seal portion. The peripheral seal portion includes the second portion sandwiched, and is characterized in that the outer surface of the sandwiched portion sandwiching the second portion by the thermosetting resin layer is formed with irregularities.

　また本発明は上記構成の蓄電デバイスにおいて、前記凹凸は、前記挟持部分の外表面において前記弁装置の周方向に延びる凹条部によって構成されており、前記凹条部の深さは、０．０５ｍｍ～０．１ｍｍであることを特徴としている。 Further, in the power storage device having the above configuration, the unevenness is formed by a concave portion extending in the circumferential direction of the valve device on the outer surface of the sandwiched portion, and the depth of the concave portion is 0. It is characterized in that it is 05 mm to 0.1 mm.

　また本発明は上記構成の蓄電デバイスにおいて、前記周縁シール部の一面に設けられた前記凹条部の位置と、他面に設けられた前記凹条部の位置とが、前記収納部の深さ方向に重ならないことを特徴としている。 Further, in the power storage device having the above configuration, the position of the concave portion provided on one surface of the peripheral seal portion and the position of the concave portion provided on the other surface are the depths of the storage portion. It is characterized by not overlapping in the direction.

　また本発明は上記構成の蓄電デバイスにおいて、前記凹凸は、前記挟持部分の外表面に形成された梨地によって構成されており、前記梨地の表面粗さＲａは、１μｍ～２０μｍであることを特徴としている。 Further, the present invention is characterized in that, in the power storage device having the above configuration, the unevenness is composed of a satin finish formed on the outer surface of the sandwiched portion, and the surface roughness Ra of the satin finish is 1 μm to 20 μm. There is.

　また本発明は上記構成の蓄電デバイスにおいて、前記周縁シール部の一面に設けられた前記凹凸は、第１凹部と、前記第１凹部よりも前記収納部の深さ方向の外側に突出した第１凸部とを含み、
　前記周縁シール部の他面に設けられた前記凹凸は、第２凹部と、前記第２凹部よりも前記収納部の深さ方向の外側に突出した第２凸部とを含み、
　前記第１凹部の底部及び前記第２凹部の底部が丸みを帯びていることを特徴としている。 Further, in the power storage device having the above configuration, the unevenness provided on one surface of the peripheral edge seal portion is the first concave portion and the first concave portion protruding outward from the first concave portion in the depth direction of the storage portion. Including convex parts
The unevenness provided on the other surface of the peripheral edge seal portion includes a second concave portion and a second convex portion that protrudes outward from the second concave portion in the depth direction of the storage portion.
The bottom of the first recess and the bottom of the second recess are rounded.

　また本発明は上記構成の蓄電デバイスにおいて、前記弁装置は、前記外装部材の内部において発生したガスを前記外装部材の外部へ排出する通気路が形成された筐体と、前記筐体に保持されるとともに前記外装部材の内部において発生した前記ガスに起因して前記外装部材の内圧が上昇した場合に前記ガスを前記通気路を介して前記外装部材の外部へ通過させる弁機構とを有し、前記筐体の外周面上には前記外装部材の外側に配される平行な第１平面及び第２平面が設けられることを特徴としている。 Further, in the power storage device having the above configuration, the valve device is held in a housing in which a ventilation path for discharging gas generated inside the exterior member to the outside of the exterior member is formed and in the housing. In addition, it has a valve mechanism that allows the gas to pass to the outside of the exterior member through the ventilation path when the internal pressure of the exterior member rises due to the gas generated inside the exterior member. A parallel first plane and a second plane arranged outside the exterior member are provided on the outer peripheral surface of the housing.

　また本発明は上記構成の蓄電デバイスにおいて、前記筐体は、前記外装部材に固定される取付部と、前記外装部材の外側に配置されて前記弁機構を保持する弁機能部と、前記取付部と前記弁機能部との間に配置されて前記第１平面及び前記第２平面を設けられる平行部とを有することを特徴としている。 Further, in the power storage device having the above configuration, the housing has a mounting portion fixed to the exterior member, a valve function portion arranged outside the exterior member to hold the valve mechanism, and the mounting portion. It is characterized by having a parallel portion arranged between the valve function portion and the valve function portion and provided with the first plane and the second plane.

　また本発明は上記構成の蓄電デバイスにおいて、前記筐体は、前記外装部材に固定される取付部と、前記外装部材の外側に配置されて前記弁機構を保持する弁機能部と、前記弁機能部の外側に配置されて前記第１平面及び前記第２平面を設けられる平行部とを有することを特徴としている。 Further, in the power storage device having the above configuration, the housing has a mounting portion fixed to the exterior member, a valve function portion arranged outside the exterior member to hold the valve mechanism, and the valve function. It is characterized by having a parallel portion which is arranged outside the portion and is provided with the first plane and the second plane.

　また本発明は上記構成の蓄電デバイスにおいて、前記筐体は、前記外装部材に固定される取付部と、前記外装部材の外側に配置されて前記弁機構を保持するとともに前記第１平面及び前記第２平面を設けられる弁機能部とを有することを特徴としている。 Further, in the power storage device having the above-described configuration, the housing has a mounting portion fixed to the exterior member and is arranged outside the exterior member to hold the valve mechanism, and the first plane and the first plane. It is characterized by having a valve function portion provided with two flat surfaces.

　また本発明は上記構成の蓄電デバイスにおいて、前記筐体は、前記外装部材に固定されて前記弁機構を保持する取付部を有し、前記第１平面及び前記第２平面が前記外装部材の外側の前記筐体上に配されることを特徴としている。 Further, in the power storage device having the above configuration, the housing has a mounting portion fixed to the exterior member to hold the valve mechanism, and the first plane and the second plane are outside the exterior member. It is characterized in that it is arranged on the housing.

　また本発明は上記構成の蓄電デバイスにおいて、前記取付部の軸方向に垂直な断面形状が非円形であることを特徴としている。 Further, the present invention is characterized in that, in the power storage device having the above configuration, the cross-sectional shape perpendicular to the axial direction of the mounting portion is non-circular.

　また本発明は上記構成の蓄電デバイスにおいて、前記取付部は、中央部から前記周縁シール部に沿った第１方向に向かうほど薄く形成された第１翼状部と、前記第１方向と反対の第２方向に向かうほど薄く形成された第２翼状部とを有することを特徴としている。 Further, in the power storage device having the above configuration, the mounting portion has a first wing-shaped portion formed thinner from the central portion toward the first direction along the peripheral seal portion, and a first wing-shaped portion opposite to the first direction. It is characterized by having a second wing-shaped portion formed thinner toward two directions.

　また本発明は上記構成の蓄電デバイスにおいて、前記第１平面及び前記第２平面は、前記第１方向及び前記第２方向に平行または垂直であることを特徴としている。 Further, the present invention is characterized in that, in the power storage device having the above configuration, the first plane and the second plane are parallel or perpendicular to the first direction and the second direction.

　また本発明は上記構成の蓄電デバイスにおいて、前記弁装置は、前記外装部材に取り付けられる取付部と、前記外装部材の内部において発生したガスに起因して前記外装部材の内部の圧力が上昇した場合に該圧力を低下させるように構成される弁機能部と、前記取付部と前記弁機能部との間に設けられるとともに前記取付部内を通過したガスを前記弁機能部内へ通過させるように構成されたガス通過部とを有し、前記弁機能部が前記外装部材の外周よりも外側に位置することを特徴としている。 Further, in the power storage device having the above configuration, the valve device is used when the pressure inside the exterior member increases due to the attachment portion attached to the exterior member and the gas generated inside the exterior member. A valve functioning portion configured to reduce the pressure, and a gas provided between the mounting portion and the valve functioning portion and passing through the mounting portion are configured to pass into the valve functioning portion. It is characterized in that the valve function portion is located outside the outer periphery of the exterior member.

　また本発明は上記構成の蓄電デバイスにおいて、前記ガス通過部の長さが１０ｍｍ以上であることを特徴としている。 Further, the present invention is characterized in that, in the power storage device having the above configuration, the length of the gas passing portion is 10 mm or more.

　また本発明は上記構成の蓄電デバイスにおいて、前記ガス通過部が曲げ伸ばし可能な柔軟性を備えていることを特徴としている。 Further, the present invention is characterized in that, in the power storage device having the above configuration, the gas passing portion has flexibility that allows bending and stretching.

　また本発明は上記構成の蓄電デバイスにおいて、前記ガス通過部が内部に乾燥剤を保持することを特徴としている。 Further, the present invention is characterized in that, in the power storage device having the above configuration, the gas passing portion holds a desiccant inside.

　また本発明は上記構成の蓄電デバイスにおいて、２５℃環境において、ＪＩＳ　Ｚ２３３１：２００６の「ヘリウム漏れ試験方法」における「真空吹付け法（スプレー法）」に規定された方法に準拠して測定される、前記弁装置の二次側から一次側へのヘリウムリーク量が５．０×１０-11Ｐａ・ｍ3／ｓｅｃ以上、５．０×１０-6Ｐａ・ｍ3／ｓｅｃ以下であることを特徴としている。 Further, the present invention is measured in a power storage device having the above configuration in a 25 ° C. environment in accordance with the method specified in the "vacuum spraying method (spray method)" in the "helium leakage test method" of JIS Z2331: 2006. The amount of helium leak from the secondary side to the primary side of the valve device is 5.0 × 10 -11 Pa · m 3 / sec or more and 5.0 × 10 -6 Pa · m 3 / sec or less. It is a feature.

　また本発明は上記構成の蓄電デバイスにおいて、前記外装部材が前記収納部の深さ方向から見て略矩形を有し、前記第２方向の一端の底辺を除く３辺のいずれかに前記弁装置を取り付けられることを特徴としている。 Further, in the power storage device having the above configuration, the exterior member has a substantially rectangular shape when viewed from the depth direction of the storage portion, and the valve device is provided on any of three sides excluding the bottom of one end in the second direction. It is characterized by being able to be attached.

　また本発明は上記構成の蓄電デバイスにおいて、前記外装部材が第１包装材及び第２包装材により形成され、前記積層体は、少なくとも、基材層、バリア層及び前記熱接着性樹脂層をこの順に有し、前記第１包装材と前記第２包装材とは、前記熱接着性樹脂層が互いに対向するように配置されていることを特徴としている。 Further, in the power storage device having the above configuration, the exterior member is formed of the first packaging material and the second packaging material, and the laminate includes at least a base material layer, a barrier layer and the thermosetting resin layer. The first packaging material and the second packaging material are provided in this order, and the thermosetting resin layers are arranged so as to face each other.

　また本発明は上記構成の蓄電デバイスにおいて、前記収納部の前記第１方向の長さが前記第２方向の長さよりも大きいことを特徴としている。 Further, the present invention is characterized in that, in the power storage device having the above configuration, the length of the storage portion in the first direction is larger than the length in the second direction.

　また本発明は上記構成の蓄電デバイスにおいて、前記収納部の前記第１方向の長さが前記第２方向の長さの２倍～３０倍であることを特徴としている。 Further, the present invention is characterized in that, in the power storage device having the above configuration, the length of the storage portion in the first direction is 2 to 30 times the length in the second direction.

　また本発明は上記構成の蓄電デバイスにおいて、前記第１方向に延びる前記周縁シール部が折曲により前記収納部の周壁上に重ねられることを特徴としている。 Further, the present invention is characterized in that, in the power storage device having the above configuration, the peripheral seal portion extending in the first direction is overlapped on the peripheral wall of the storage portion by bending.

　また本発明は上記構成の蓄電デバイスにおいて、前記外装部材の流れ方向が前記第１方向に直交することを特徴としている。 Further, the present invention is characterized in that, in the power storage device having the above configuration, the flow direction of the exterior member is orthogonal to the first direction.

　また本発明は上記構成の蓄電デバイスにおいて、前記蓄電素子が第１電極端子及び第２電極端子を有し、前記第１電極端子及び前記第２電極端子が前記第２方向に延びる前記周縁シール部から突出することを特徴としている。 Further, in the power storage device having the above configuration, the power storage element has a first electrode terminal and a second electrode terminal, and the first electrode terminal and the second electrode terminal extend in the second direction. It is characterized by protruding from.

　また本発明は上記構成の蓄電デバイスにおいて、前記第１電極端子及び前記第２電極端子が前記第１方向に対向する前記周縁シール部からそれぞれ突出することを特徴としている。 Further, the present invention is characterized in that, in the power storage device having the above configuration, the first electrode terminal and the second electrode terminal protrude from the peripheral seal portion facing the first direction, respectively.

　また本発明は、上記各構成の蓄電デバイスを前記収納部の深さ方向に複数並設して外装容器に収納し、電動自動車に搭載される蓄電デバイス集合体において、複数の前記蓄電デバイスを並設した方向の長さが前記第２方向の長さよりも大きいことを特徴としている。 Further, in the present invention, a plurality of power storage devices having the above configurations are arranged side by side in the depth direction of the storage portion and stored in an outer container, and a plurality of the power storage devices are arranged side by side in an aggregate of power storage devices mounted on an electric vehicle. It is characterized in that the length in the provided direction is larger than the length in the second direction.

　また本発明は上記構成の蓄電デバイス集合体において、前記外装容器が載置される載置部材を備え、前記載置部材が温度調整機能を有することを特徴としている。 Further, the present invention is characterized in that, in the power storage device assembly having the above configuration, the mounting member on which the outer container is mounted is provided, and the mounting member described above has a temperature adjusting function.

　また本発明は上記構成の蓄電デバイス集合体において、前記外装容器が載置される載置部材を備え、前記載置部材が液体吸収材により形成されることを特徴としている。 Further, the present invention is characterized in that, in the power storage device assembly having the above configuration, the mounting member on which the outer container is mounted is provided, and the mounting member described above is formed of a liquid absorbent material.

　また本発明の電動自動車は、上記構成の蓄電デバイス集合体と、前記蓄電デバイス集合体から電力供給される駆動モータと、前記駆動モータにより駆動される車輪とを備え、前記蓄電デバイス集合体が車体底部に高さ方向に１段で配置されることを特徴としている。 Further, the electric vehicle of the present invention includes a power storage device assembly having the above configuration, a drive motor to which power is supplied from the power storage device assembly, and wheels driven by the drive motor, and the power storage device assembly is a vehicle body. It is characterized in that it is arranged in one step in the height direction on the bottom.

　また本発明は、電動自動車に駆動源として搭載される蓄電デバイスの製造方法において、熱接着性樹脂層を有する積層体の第１包装材及び第２包装材を有した外装部材を準備する工程と、前記第１包装材に所定の深さで形成された収納部に蓄電素子を収納するとともに前記第１包装材及び前記第２包装材の周縁部を周縁シール部により接合して前記外装部材により包装する工程とを備え、前記収納部と外部空間とを連通可能にする弁装置が少なくとも部分的に前記周縁シール部において前記第１包装材と前記第２包装材との間に挟まれて前記外装部材に取り付けられ、前記収納部の深さ方向及び前記収納部の深さ方向に直交する第１方向が電動自動車の前後方向または左右方向に配置されるとともに、前記収納部の深さ方向及び前記第１方向に直交する第２方向が電動自動車の高さ方向に配置され、前記収納部の前記第１方向の長さが前記第２方向の長さよりも大きいことを特徴としている。 Further, the present invention is a step of preparing a first packaging material and an exterior member having a second packaging material of a laminate having a heat-adhesive resin layer in a method of manufacturing a power storage device mounted as a drive source in an electric vehicle. The power storage element is housed in a storage portion formed in the first packaging material at a predetermined depth, and the peripheral portions of the first packaging material and the second packaging material are joined by a peripheral edge sealing portion to be formed by the exterior member. A valve device including a packaging step and enabling communication between the storage portion and the external space is sandwiched between the first packaging material and the second packaging material at least partially in the peripheral sealing portion. The first direction attached to the exterior member and orthogonal to the depth direction of the storage portion and the depth direction of the storage portion is arranged in the front-rear direction or the left-right direction of the electric vehicle, and the depth direction of the storage portion and The second direction orthogonal to the first direction is arranged in the height direction of the electric vehicle, and the length of the storage portion in the first direction is larger than the length in the second direction.

　また本発明は上記構成の蓄電デバイスの製造方法において、前記弁装置は、前記収納部において発生したガスを前記外部空間へ排出する弁機構を内部に形成された第１部分と、前記収納部において発生したガスを前記弁機構に誘導する通気路を内部に形成された第２部分とを有し、前記第２部分の内端が前記周縁シール部の内側端縁から前記収納部に向かう方向に突出することを特徴としている。 Further, according to the present invention, in the method for manufacturing a power storage device having the above configuration, the valve device includes a first portion in which a valve mechanism for discharging gas generated in the storage portion to the external space is formed inside, and the storage portion. It has a second portion formed inside with a ventilation path for guiding the generated gas to the valve mechanism, and the inner end of the second portion is in the direction from the inner edge of the peripheral edge seal portion toward the storage portion. It is characterized by protruding.

　また本発明は上記構成の蓄電デバイスの製造方法において、前記弁装置は、前記収納部において発生したガスを前記外部空間へ排出する弁機構を内部に形成された第１部分と、前記収納部において発生したガスを前記弁機構に誘導する通気路を内部に形成された第２部分とを有し、
　前記第１部分は前記周縁シール部の外側の端縁よりも外側に位置しており、前記第２部分の少なくとも一部は前記周縁シール部において前記熱接着性樹脂層に挟まれ、
　前記収納部の深さ方向において、前記第１部分の長さは前記第２部分の長さよりも長く、前記第１部分と前記第２部分との境界には段差が形成されていることを特徴としている。 Further, according to the present invention, in the method for manufacturing a power storage device having the above configuration, the valve device includes a first portion in which a valve mechanism for discharging gas generated in the storage portion to the external space is formed inside, and the storage portion. It has a second portion formed inside with a ventilation path for guiding the generated gas to the valve mechanism.
The first portion is located outside the outer edge of the peripheral edge seal portion, and at least a part of the second portion is sandwiched between the thermosetting resin layers in the peripheral edge seal portion.
In the depth direction of the storage portion, the length of the first portion is longer than the length of the second portion, and a step is formed at the boundary between the first portion and the second portion. It is said.

　また本発明は上記構成の蓄電デバイスの製造方法において、前記弁装置は、前記収納部において発生したガスを前記外部空間へ排出する弁機構を内部に形成された第１部分と、前記収納部において発生したガスを前記弁機構に誘導する通気路を内部に形成された第２部分とを有し、
　前記第１部分は前記周縁シール部の外側の端縁よりも外側に位置しており、前記第２部分の少なくとも一部は前記周縁シール部において前記熱接着性樹脂層に挟まれ、
　前記第１方向の前記第２部分の長さは、前記収納部の深さ方向の前記第２部分の長さよりも長いことを特徴としている。 Further, according to the present invention, in the method for manufacturing a power storage device having the above configuration, the valve device includes a first portion in which a valve mechanism for discharging gas generated in the storage portion to the external space is formed inside, and the storage portion. It has a second portion formed inside with a ventilation path for guiding the generated gas to the valve mechanism.
The first portion is located outside the outer edge of the peripheral edge seal portion, and at least a part of the second portion is sandwiched between the thermosetting resin layers in the peripheral edge seal portion.
The length of the second portion in the first direction is longer than the length of the second portion in the depth direction of the storage portion.

　また本発明は上記構成の蓄電デバイスの製造方法において、前記弁装置は、前記収納部において発生したガスを前記外部空間へ排出する弁機構を内部に形成された第１部分と、前記収納部において発生したガスを前記弁機構に誘導する通気路を内部に形成された第２部分とを有し、
　前記第１部分は前記周縁シール部の外側の端縁よりも外側に位置しており、前記第２部分の少なくとも一部は前記周縁シール部において前記熱接着性樹脂層に挟まれ、
　前記第２部分は前記第１方向の端部に近づくほど薄く形成された翼状延端部を有することを特徴としている。 Further, according to the present invention, in the method for manufacturing a power storage device having the above configuration, the valve device includes a first portion in which a valve mechanism for discharging gas generated in the storage portion to the external space is formed inside, and the storage portion. It has a second portion formed inside with a ventilation path for guiding the generated gas to the valve mechanism.
The first portion is located outside the outer edge of the peripheral edge seal portion, and at least a part of the second portion is sandwiched between the thermosetting resin layers in the peripheral edge seal portion.
The second portion is characterized by having a wing-shaped extension portion formed thinner as it approaches the end portion in the first direction.

　また本発明は上記構成の蓄電デバイスの製造方法において、前記弁装置は、前記収納部において発生したガスを前記外部空間へ排出する弁機構を内部に形成された第１部分と、前記収納部において発生したガスを前記弁機構に誘導する通気路を内部に形成された第２部分とを有し、
　前記第１部分は前記周縁シール部の外側の端縁よりも外側に位置しており、前記第２部分の少なくとも一部は前記周縁シール部において前記熱接着性樹脂層に挟まれ、
　前記第２部分の外表面には、周方向に延びる凸条部が少なくとも１つ形成されていることを特徴としている。 Further, according to the present invention, in the method for manufacturing a power storage device having the above configuration, the valve device includes a first portion in which a valve mechanism for discharging gas generated in the storage portion to the external space is formed inside, and the storage portion. It has a second portion formed inside with a ventilation path for guiding the generated gas to the valve mechanism.
The first portion is located outside the outer edge of the peripheral edge seal portion, and at least a part of the second portion is sandwiched between the thermosetting resin layers in the peripheral edge seal portion.
The outer surface of the second portion is characterized in that at least one convex portion extending in the circumferential direction is formed.

　また本発明は上記構成の蓄電デバイスの製造方法において、前記弁装置は、前記収納部において発生したガスを前記外部空間へ排出する弁機構を内部に形成された第１部分と、前記収納部において発生したガスを前記弁機構に誘導する通気路を内部に形成された第２部分とを有し、前記弁装置の内端は前記収納部の外側端縁よりも外側に位置し、前記通気路の延びる方向に沿って視たときに、前記第１部分の外形は前記第２部分の外形から前記収納部の深さ方向においてはみ出していることを特徴としている。 Further, according to the present invention, in the method for manufacturing a power storage device having the above configuration, the valve device includes a first portion in which a valve mechanism for discharging gas generated in the storage portion to the external space is formed inside, and the storage portion. It has a second portion formed inside with a ventilation path for guiding the generated gas to the valve mechanism, and the inner end of the valve device is located outside the outer edge of the storage portion, and the ventilation path. The outer shape of the first portion protrudes from the outer shape of the second portion in the depth direction of the storage portion when viewed along the extending direction of the first portion.

　また本発明は上記構成の蓄電デバイスの製造方法において、前記弁装置は、前記収納部において発生したガスを前記外部空間へ排出する弁機構を内部に形成された第１部分と、前記収納部において発生したガスを前記弁機構に誘導する通気路を内部に形成された第２部分とを有し、前記弁装置の内端は前記収納部の外側端縁よりも外側に位置し、前記第１部分は前記第２部分よりも前記通気路の延びる方向に直交する断面における断面積が大きいことを特徴としている。 Further, according to the present invention, in the method for manufacturing a power storage device having the above configuration, the valve device includes a first portion in which a valve mechanism for discharging gas generated in the storage portion to the external space is formed inside, and the storage portion. It has a second portion formed inside with a ventilation path for guiding the generated gas to the valve mechanism, and the inner end of the valve device is located outside the outer edge of the storage portion, and the first The portion is characterized in that the cross-sectional area in the cross section orthogonal to the extending direction of the air passage is larger than that of the second portion.

　また本発明は上記構成の蓄電デバイスの製造方法において、前記弁装置は、前記収納部において発生したガスを前記外部空間へ排出する弁機構と、前記弁機構を内部に形成された筐体とを有し、前記弁装置の内端は前記収納部の外側端縁よりも外側で前記周縁シール部の内側端縁まで達しており、前記筐体の内端部には前記弁機構の閉状態において前記収納部に連通する開口が形成されることを特徴としている。 Further, in the method for manufacturing a power storage device having the above configuration, the present invention comprises a valve mechanism for discharging the gas generated in the storage portion to the external space and a housing in which the valve mechanism is formed inside. The inner end of the valve device reaches the inner end edge of the peripheral edge seal portion on the outer side of the outer end edge of the storage portion, and the inner end portion of the housing is in a closed state of the valve mechanism. It is characterized in that an opening communicating with the storage portion is formed.

　また本発明は上記構成の蓄電デバイスの製造方法において、前記弁装置は、前記周縁シール部の外側の端縁よりも外側に位置している第１部分と、前記周縁シール部において前記熱接着性樹脂層に挟まれている第２部分とを含み、前記周縁シール部は、前記第２部分を前記熱接着性樹脂層によって挟む挟持部分の外表面に凹凸を形成されていることを特徴としている。 Further, according to the present invention, in the method for manufacturing a power storage device having the above configuration, the valve device has a first portion located outside the outer edge of the peripheral edge seal portion and the thermal adhesiveness at the peripheral edge seal portion. The peripheral seal portion includes a second portion sandwiched between the resin layers, and is characterized in that the outer surface of the sandwiched portion sandwiching the second portion by the thermosetting resin layer is formed with irregularities. ..

　また本発明は上記構成の蓄電デバイスの製造方法において、前記弁装置は、前記外装部材の内部において発生したガスを前記外装部材の外部へ排出する通気路が形成された筐体と、前記筐体に保持されるとともに前記外装部材の内部において発生した前記ガスに起因して前記外装部材の内圧が上昇した場合に前記ガスを前記通気路を介して前記外装部材の外部へ通過させる弁機構とを有し、前記筐体の外周面上には前記外装部材の外側に配される平行な第１平面及び第２平面が設けられることを特徴としている。 Further, according to the present invention, in the method for manufacturing a power storage device having the above configuration, the valve device includes a housing in which a ventilation path for discharging gas generated inside the exterior member to the outside of the exterior member is formed, and the housing. A valve mechanism that allows the gas to pass to the outside of the exterior member through the ventilation path when the internal pressure of the exterior member rises due to the gas generated inside the exterior member. It is characterized in that parallel first planes and second planes arranged outside the exterior member are provided on the outer peripheral surface of the housing.

　また本発明は上記構成の蓄電デバイスの製造方法において、前記弁装置は、前記外装部材に取り付けられる取付部と、前記外装部材の内部において発生したガスに起因して前記外装部材の内部の圧力が上昇した場合に該圧力を低下させるように構成される弁装置本体と、前記取付部と前記弁装置本体との間に設けられるとともに前記取付部内を通過したガスを前記弁装置本体内へ通過させるように構成されたガス通過部とを有し、前記弁装置本体が前記外装部材の外周よりも外側に位置することを特徴としている。 Further, according to the present invention, in the method for manufacturing a power storage device having the above configuration, in the valve device, the pressure inside the exterior member is increased due to the attachment portion attached to the exterior member and the gas generated inside the exterior member. A valve device main body configured to reduce the pressure when the pressure rises, and a gas provided between the mounting portion and the valve device main body and passing through the mounting portion are passed into the valve device main body. It is characterized in that it has a gas passing portion configured as described above, and the valve device main body is located outside the outer periphery of the exterior member.

　また本発明は上記構成の蓄電デバイスの製造方法において、前記収納部の前記第１方向の長さが前記第２方向の長さの２倍～３０倍であることを特徴としている。 Further, the present invention is characterized in that, in the method for manufacturing a power storage device having the above configuration, the length of the storage portion in the first direction is 2 to 30 times the length in the second direction.

　また本発明は上記構成の蓄電デバイスの製造方法において、前記外装部材により包装する工程が、前記熱接着性樹脂層の熱接着により前記外装部材を封止する周縁シール部を前記外装部材の周部に形成し、前記第２方向に延びる前記周縁シール部を折曲して前記収納部の周壁上に重ねることを特徴としている。 Further, in the method for manufacturing a power storage device having the above configuration, the step of packaging with the exterior member is to provide a peripheral seal portion for sealing the exterior member by heat adhesion of the heat-adhesive resin layer to a peripheral portion of the exterior member. It is characterized in that the peripheral seal portion extending in the second direction is bent and overlapped on the peripheral wall of the storage portion.

　また本発明は上記構成の蓄電デバイスの製造方法において、前記外装部材の流れ方向に対して前記第１方向が直交することを特徴としている。 Further, the present invention is characterized in that, in the method for manufacturing a power storage device having the above configuration, the first direction is orthogonal to the flow direction of the exterior member.

　本発明によると、蓄電デバイスが外装部材の収納部の深さ方向及び深さ方向に直交する第１方向を電動自動車の前後方向または左右方向に配置される。また、収納部の深さ方向及び第１方向に直交する第２方向が電動自動車の高さ方向に配置される。これにより、複数の蓄電デバイスを積み重ねずに電動自動車に設置して所望の電力を供給することができる。従って、積み重ねた際の加重による外装部材の破損を防止することができ、蓄電デバイス、蓄電デバイス集合体及び電動自動車の信頼性を向上することができる。また、外装部材の周縁シール部に弁装置が取り付けられるため、ガス抜きを行う圧力の正確な制御が可能となる。 According to the present invention, the power storage device is arranged in the front-rear direction or the left-right direction of the electric vehicle in the first direction orthogonal to the depth direction and the depth direction of the storage portion of the exterior member. Further, the depth direction of the storage portion and the second direction orthogonal to the first direction are arranged in the height direction of the electric vehicle. As a result, it is possible to install the plurality of power storage devices in the electric vehicle without stacking them and supply desired electric power. Therefore, it is possible to prevent damage to the exterior members due to the load when they are stacked, and it is possible to improve the reliability of the power storage device, the power storage device assembly, and the electric vehicle. Further, since the valve device is attached to the peripheral seal portion of the exterior member, it is possible to accurately control the pressure for degassing.

本発明の第１実施形態の電動自動車を示す側面図Side view which shows the electric vehicle of 1st Embodiment of this invention 本発明の第１実施形態の電動自動車を示す上面図Top view showing the electric vehicle of the first embodiment of the present invention 本発明の第１実施形態の電動自動車の蓄電デバイスパックを示す斜視図A perspective view showing a power storage device pack of an electric vehicle according to a first embodiment of the present invention. 本発明の第１実施形態の電動自動車の蓄電デバイスを示す分解斜視図An exploded perspective view showing a power storage device of an electric vehicle according to a first embodiment of the present invention. 本発明の第１実施形態の電動自動車の蓄電デバイスを示す正面図Front view showing the power storage device of the electric vehicle according to the first embodiment of the present invention. 本発明の第１実施形態の電動自動車の蓄電デバイスを示す側面断面図Side sectional view showing the power storage device of the electric vehicle of the first embodiment of the present invention. 本発明の第１実施形態の電動自動車の蓄電デバイスの外装部材の包装材を示す断面図Sectional drawing which shows the packaging material of the exterior member of the power storage device of the electric vehicle of 1st Embodiment of this invention. 図５のＡ－Ａ断面図AA sectional view of FIG. 図５のＢ－Ｂ断面図BB sectional view of FIG. 他の例の図５のＢ－Ｂ断面図BB sectional view of FIG. 5 of another example 本発明の第１実施形態の電動自動車の蓄電デバイスの弁装置を示す正面図Front view showing the valve device of the power storage device of the electric vehicle of the first embodiment of the present invention. 図１１のＥ－Ｅ断面図EE sectional view of FIG. 図１１のＦ－Ｆ断面図FF sectional view of FIG. 図５のＤ－Ｄ断面図であり、弁装置の取付け状態を説明するための図It is the DD cross-sectional view of FIG. 5, and is the figure for demonstrating the mounting state of the valve device. 図５のＨ部拡大図Enlarged view of part H in FIG. 他の例の図５のＨ部拡大図Enlarged view of part H in FIG. 5 of another example 本発明の第１実施形態の電動自動車の蓄電デバイスの製造手順を示すフローチャートA flowchart showing a manufacturing procedure of a power storage device for an electric vehicle according to a first embodiment of the present invention. 本発明の第１実施形態の電動自動車の蓄電デバイスの弁装置を配置する動作を説明する図The figure explaining the operation which arranges the valve device of the power storage device of the electric vehicle of 1st Embodiment of this invention. 本発明の第２実施形態の電動自動車の蓄電デバイスを示す分解斜視図An exploded perspective view showing a power storage device of an electric vehicle according to a second embodiment of the present invention. 本発明の第２実施形態の電動自動車の蓄電デバイスを示す側面断面図Side sectional view showing the power storage device of the electric vehicle of the second embodiment of the present invention. 本発明の第２実施形態の電動自動車の蓄電デバイスを保護カバーで覆った状態を示す側面断面図Side sectional view showing a state in which the power storage device of the electric vehicle according to the second embodiment of the present invention is covered with a protective cover. 本発明の第２実施形態の電動自動車の蓄電デバイスを他の保護カバーで覆った状態を示す側面断面図Side sectional view showing a state in which the power storage device of the electric vehicle according to the second embodiment of the present invention is covered with another protective cover. 本発明の第３実施形態の電動自動車の蓄電デバイスを示す分解斜視図An exploded perspective view showing a power storage device of an electric vehicle according to a third embodiment of the present invention. 本発明の第４実施形態の電動自動車を示す上面図Top view showing an electric vehicle according to a fourth embodiment of the present invention 本発明の第５実施形態の電動自動車の蓄電デバイスの弁装置を示す横断面図A cross-sectional view showing a valve device of a power storage device of an electric vehicle according to a fifth embodiment of the present invention. 本発明の第６実施形態の電動自動車の蓄電デバイスの弁装置を示す横断面図A cross-sectional view showing a valve device of a power storage device of an electric vehicle according to a sixth embodiment of the present invention. 本発明の第７実施形態の電動自動車の蓄電デバイスの弁装置を示す正面図Front view showing a valve device of a power storage device of an electric vehicle according to a seventh embodiment of the present invention. 本発明の第７実施形態の電動自動車の蓄電デバイスの弁装置を示す横断面図A cross-sectional view showing a valve device of a power storage device of an electric vehicle according to a seventh embodiment of the present invention. 本発明の第８実施形態の電動自動車の蓄電デバイスの弁装置を示す正面図Front view showing a valve device of a power storage device of an electric vehicle according to an eighth embodiment of the present invention. 本発明の第９実施形態の電動自動車の蓄電デバイスの弁装置を示す正面図Front view showing a valve device of a power storage device of an electric vehicle according to a ninth embodiment of the present invention. 本発明の第９実施形態の電動自動車の蓄電デバイスの弁装置の取付部を示す縦断面図A vertical sectional view showing a mounting portion of a valve device of a power storage device of an electric vehicle according to a ninth embodiment of the present invention. 本発明の第１０実施形態の電動自動車の蓄電デバイスの弁装置を示す正面図Front view showing a valve device of a power storage device of an electric vehicle according to a tenth embodiment of the present invention. 本発明の第１０実施形態の電動自動車の蓄電デバイスの弁装置を示す横断面図A cross-sectional view showing a valve device of a power storage device of an electric vehicle according to a tenth embodiment of the present invention. 本発明の第１０実施形態の電動自動車の蓄電デバイスを示す上面図Top view showing a power storage device of an electric vehicle according to a tenth embodiment of the present invention. 本発明の第１１実施形態の電動自動車の蓄電デバイスの弁装置を示す横断面図A cross-sectional view showing a valve device of a power storage device of an electric vehicle according to an eleventh embodiment of the present invention. 本発明の第１２実施形態の電動自動車の蓄電デバイスの弁装置を示す横断面図A cross-sectional view showing a valve device of a power storage device of an electric vehicle according to a twelfth embodiment of the present invention. 本発明の第１３実施形態の電動自動車の蓄電デバイスの弁装置を示す横断面図A cross-sectional view showing a valve device of a power storage device of an electric vehicle according to a thirteenth embodiment of the present invention. 本発明の第１４実施形態の電動自動車の蓄電デバイスの弁装置を示す横断面図A cross-sectional view showing a valve device of a power storage device of an electric vehicle according to a fourteenth embodiment of the present invention. 本発明の第１５実施形態の電動自動車の蓄電デバイスの包装材を示す正面図Front view showing the packaging material of the power storage device of the electric vehicle of the fifteenth embodiment of the present invention. 本発明の第１５実施形態の電動自動車の蓄電デバイスの包装材の一部を示す上面図Top view showing a part of the packaging material of the power storage device of the electric vehicle of the fifteenth embodiment of the present invention. 本発明の第１６実施形態の電動自動車の蓄電デバイスを示す正面図Front view showing the power storage device of the electric vehicle of the 16th embodiment of the present invention. 図４１のＪ部拡大図Enlarged view of part J in FIG. 41 他の例の図４１のＪ部拡大図Enlarged view of part J in FIG. 41 of another example 本発明の第１７実施形態の電動自動車の蓄電デバイスを示す正面図Front view showing the power storage device of the electric vehicle of the 17th embodiment of the present invention. 図４４のＧ－Ｇ断面図であり、弁装置の取付け状態を説明するための図It is a cross-sectional view of GG of FIG. 44, and is the figure for demonstrating the mounting state of the valve device. 本発明の第１７実施形態の電動自動車の蓄電デバイスの弁装置の取付け状態を説明するための拡大図An enlarged view for explaining an attached state of a valve device of a power storage device of an electric vehicle according to a seventeenth embodiment of the present invention. 本発明の第１７実施形態の電動自動車の蓄電デバイスの製造工程に用いられるヒートシール装置の概略構成図Schematic configuration diagram of the heat sealing device used in the manufacturing process of the power storage device of the electric vehicle according to the 17th embodiment of the present invention. 本発明の第１８実施形態の電動自動車の蓄電デバイスの弁装置を示す正面図Front view showing the valve device of the power storage device of the electric vehicle of the 18th embodiment of the present invention. 本発明の第１８実施形態の電動自動車の蓄電デバイスの製造工程に用いられるヒートシール装置の概略構成図Schematic configuration diagram of the heat sealing device used in the manufacturing process of the power storage device of the electric vehicle according to the eighteenth embodiment of the present invention. 本発明の第１９実施形態の電動自動車の蓄電デバイスの弁装置の取付け状態を説明するための拡大図An enlarged view for explaining an attached state of a valve device of a power storage device of an electric vehicle according to a nineteenth embodiment of the present invention. 本発明の第２０実施形態の電動自動車の蓄電デバイスを示す正面図Front view showing a power storage device of an electric vehicle according to a twentieth embodiment of the present invention. 本発明の第２０実施形態の電動自動車の蓄電デバイスを示す側面断面図Side sectional view showing a power storage device of an electric vehicle according to a twentieth embodiment of the present invention. 図５１のＫ－Ｋ断面図KK sectional view of FIG. 51 本発明の第２０実施形態の電動自動車の蓄電デバイスの弁装置を示す正面図Front view showing the valve device of the power storage device of the electric vehicle of the 20th embodiment of the present invention. 本発明の第２０実施形態の電動自動車の蓄電デバイスの弁装置を示す底面図Bottom view showing a valve device of a power storage device of an electric vehicle according to a twentieth embodiment of the present invention. 本発明の第２０実施形態の電動自動車の蓄電デバイスの弁装置を示す上面図Top view showing a valve device of a power storage device of an electric vehicle according to a twentieth embodiment of the present invention. 図５５のＭ－Ｍ断面図MM cross-sectional view of FIG. 55 図５５のＮ－Ｎ断面図NN sectional view of FIG. 55 本発明の第２０実施形態の電動自動車の蓄電デバイスの弁装置を取り付ける作業を説明する図The figure explaining the work of attaching the valve device of the power storage device of the electric vehicle of the 20th embodiment of this invention. 本発明の第２０実施形態の電動自動車の蓄電デバイスの弁装置を取り付ける作業を説明する図The figure explaining the work of attaching the valve device of the power storage device of the electric vehicle of the 20th embodiment of this invention. 本発明の第２０実施形態の電動自動車の蓄電デバイスの弁装置を取り付ける作業を説明する図The figure explaining the work of attaching the valve device of the power storage device of the electric vehicle of the 20th embodiment of this invention. 本発明の第２１実施形態の電動自動車の蓄電デバイスの弁装置を示す側面断面図Side sectional view showing the valve device of the power storage device of the electric vehicle of the 21st embodiment of the present invention. 本発明の第２１実施形態の電動自動車の蓄電デバイスの弁装置のフィルムを示す平面図The plan view which shows the film of the valve device of the power storage device of the electric vehicle of 21st Embodiment of this invention. 本発明の第２２実施形態の電動自動車の蓄電デバイスの弁装置を示す底面図Bottom view showing the valve device of the power storage device of the electric vehicle of the 22nd embodiment of the present invention. 本発明の第２３実施形態の電動自動車の蓄電デバイスの弁装置を示す正面図Front view showing the valve device of the power storage device of the electric vehicle of the 23rd embodiment of the present invention. 本発明の第２４実施形態の電動自動車の蓄電デバイスの弁装置を示す底面図Bottom view showing the valve device of the power storage device of the electric vehicle according to the 24th embodiment of the present invention. 本発明の第２５実施形態の電動自動車の蓄電デバイスの弁装置を示す底面図Bottom view showing a valve device of a power storage device of an electric vehicle according to a 25th embodiment of the present invention. 本発明の第２６実施形態の電動自動車の蓄電デバイスの弁装置を示す底面図Bottom view showing the valve device of the power storage device of the electric vehicle according to the 26th embodiment of the present invention. 本発明の第２７実施形態の電動自動車の蓄電デバイスの弁装置を示す側面断面図Side sectional view showing the valve device of the power storage device of the electric vehicle of the 27th embodiment of the present invention. 本発明の第２８実施形態の電動自動車の蓄電デバイスの弁装置を示す側面断面図Side sectional view showing the valve device of the power storage device of the electric vehicle of the 28th embodiment of the present invention. 本発明の第２９実施形態の電動自動車の蓄電デバイスの弁装置を示す正面図Front view showing the valve device of the power storage device of the electric vehicle of the 29th embodiment of the present invention. 図７１のＶ－Ｖ断面図VV cross-sectional view of FIG. 71 本発明の第２９実施形態の電動自動車の蓄電デバイスパックを示す側面断面図Side sectional view showing the power storage device pack of the electric vehicle of the 29th embodiment of the present invention. 本発明の第３０実施形態の電動自動車の蓄電デバイスパックを示す側面断面図Side sectional view showing a power storage device pack of an electric vehicle according to a thirtieth embodiment of the present invention. 本発明の第３０実施形態の電動自動車の蓄電デバイスの弁装置を示す上面図Top view showing a valve device of a power storage device of an electric vehicle according to a thirtieth embodiment of the present invention. 図７５のＷ－Ｗ断面図WW sectional view of FIG. 75

　＜第１実施形態＞
　以下に図面を参照して本発明の実施形態を説明する。図１、図２は第１実施形態の電動自動車１の側面図及び上面図を示している。電動自動車１は車輪２を駆動する動力源として駆動モータ３を備えている。電動自動車１の車体のフロア下の底部には駆動モータ３に電力を供給する駆動源として蓄電デバイスパック５（蓄電デバイス集合体）が設置される。 <First Embodiment>
An embodiment of the present invention will be described below with reference to the drawings. 1 and 2 show a side view and a top view of the electric vehicle 1 of the first embodiment. The electric vehicle 1 includes a drive motor 3 as a power source for driving the wheels 2. A power storage device pack 5 (collection of power storage devices) is installed at the bottom of the vehicle body of the electric vehicle 1 under the floor as a drive source for supplying electric power to the drive motor 3.

　図３は蓄電デバイスパック５の斜視図を示している。蓄電デバイスパック５は複数の蓄電デバイス１０を並設し、外装容器６により覆われる。複数の蓄電デバイス１０を包装した蓄電デバイスモジュールを複数並設して蓄電デバイスパック５を構成してもよい。 FIG. 3 shows a perspective view of the power storage device pack 5. In the power storage device pack 5, a plurality of power storage devices 10 are arranged side by side and covered with an outer container 6. A plurality of power storage device modules in which a plurality of power storage devices 10 are packaged may be arranged side by side to form the power storage device pack 5.

　各蓄電デバイス１０には金属から成る正極の電極端子１２及び負極の電極端子１３（図４参照）が設けられる。電極端子１２及び電極端子１３は所定の順に電気接続され、一対の接続端子（不図示）が外装容器６から突出する。 Each power storage device 10 is provided with a positive electrode terminal 12 and a negative electrode terminal 13 (see FIG. 4) made of metal. The electrode terminals 12 and the electrode terminals 13 are electrically connected in a predetermined order, and a pair of connection terminals (not shown) protrude from the outer container 6.

　電極端子１２、１３を構成する金属材料は、例えば、アルミニウム、ニッケル、銅等である。蓄電素子１１がリチウムイオン電池である場合は、正極に接続される電極端子１２は通常アルミニウム等によって構成され、負極に接続される電極端子１３は通常銅、ニッケル等によって構成される。 The metal materials constituting the electrode terminals 12 and 13 are, for example, aluminum, nickel, copper and the like. When the power storage element 11 is a lithium ion battery, the electrode terminal 12 connected to the positive electrode is usually made of aluminum or the like, and the electrode terminal 13 connected to the negative electrode is usually made of copper, nickel or the like.

　外装容器６は熱接着性樹脂層、金属箔及び基材層を積層した積層体により形成される。各蓄電デバイス１０は外装容器６の熱接着性樹脂層を熱接着して密封される。尚、外装容器６を射出成形品により形成してもよく、金属製容器により形成してもよい。 The outer container 6 is formed of a laminated body in which a thermosetting resin layer, a metal foil, and a base material layer are laminated. Each power storage device 10 is sealed by heat-bonding the thermosetting resin layer of the outer container 6. The outer container 6 may be formed of an injection-molded product or a metal container.

　図４、図５、図６は蓄電デバイス１０の分解斜視図、正面図及び側面断面図を示している。蓄電デバイス１０は外装部材２０に蓄電素子１１を封入した二次電池から成っている。蓄電デバイス１０として例えば、リチウムイオン電池、リチウムイオンポリマー電池、リチウムイオン全固体電池、鉛蓄電池、ニッケル水素蓄電池、ニッケルカドミウム蓄電池、ニッケル鉄蓄電池、ニッケル亜鉛蓄電池、酸化銀亜鉛蓄電池、金属空気電池、多価カチオン電池、全固体電池等が用いられる。 4, 5, and 6 show an exploded perspective view, a front view, and a side sectional view of the power storage device 10. The power storage device 10 is composed of a secondary battery in which a power storage element 11 is enclosed in an exterior member 20. Examples of the power storage device 10 include a lithium ion battery, a lithium ion polymer battery, a lithium ion all-solid-state battery, a lead storage battery, a nickel hydrogen storage battery, a nickel cadmium storage battery, a nickel iron storage battery, a nickel zinc storage battery, a silver zinc oxide storage battery, a metal air battery, and more. A valent cation battery, an all-solid-state battery, or the like is used.

　蓄電素子１１に異常が生じると、外装部材２０内においてガスが発生し得る。蓄電デバイス１０が全固体電池の場合は、例えば硫化物系の固体電解質によって硫化水素のガスが発生し得る。このため、詳細を後述するように、蓄電デバイス１０にはガスを排気する弁装置５０が設けられる。 If an abnormality occurs in the power storage element 11, gas may be generated in the exterior member 20. When the power storage device 10 is an all-solid-state battery, hydrogen sulfide gas can be generated by, for example, a sulfide-based solid electrolyte. Therefore, as will be described in detail later, the power storage device 10 is provided with a valve device 50 for exhausting gas.

　蓄電素子１１は正極板と負極板（いずれも不図示）とを絶縁体のセパレータ（不図示）を介して対向配置して形成される。正極板及び負極板にはそれぞれ電極端子１２、１３が接続される。長尺状のセパレータ、正極板及び負極板を巻回して蓄電素子１１を形成することができる。シート状の正極板、セパレータ、負極板、セパレータの順に複数段に積層して蓄電素子１１を形成してもよい。また、長尺状のセパレータ、正極板及び負極板を折り畳みにより積層して蓄電素子１１を形成してもよい。 The power storage element 11 is formed by arranging a positive electrode plate and a negative electrode plate (both not shown) facing each other via an insulator separator (not shown). Electrode terminals 12 and 13 are connected to the positive electrode plate and the negative electrode plate, respectively. The power storage element 11 can be formed by winding a long separator, a positive electrode plate, and a negative electrode plate. The power storage element 11 may be formed by stacking a sheet-shaped positive electrode plate, a separator, a negative electrode plate, and a separator in a plurality of stages in this order. Further, the power storage element 11 may be formed by laminating a long separator, a positive electrode plate and a negative electrode plate by folding.

　正極板と負極板との間には電解質が配される。本実施形態では電解質が電解液から成り、外装部材２０の内部に充填される。電解質として固体電解質またはゲル電解質を用いてもよい。 An electrolyte is arranged between the positive electrode plate and the negative electrode plate. In the present embodiment, the electrolyte is composed of an electrolytic solution and is filled inside the exterior member 20. A solid electrolyte or a gel electrolyte may be used as the electrolyte.

　外装部材２０は内面に熱接着性樹脂層３８（図７参照）を有した積層体から成る包装材１５（第１包装材）及び包装材２５（第２包装材）を備えている。 The exterior member 20 includes a packaging material 15 (first packaging material) and a packaging material 25 (second packaging material) made of a laminate having a thermosetting resin layer 38 (see FIG. 7) on the inner surface.

　図７は包装材１５の積層構造を示す断面図である。包装材２５は包装材１５と同じ積層構造になっている。包装材１５及び包装材２５は基材層３４、バリア層３６、熱接着性樹脂層３８を順に積層して形成される。包装材１５及び包装材２５の厚みは強度を考慮して５０μｍ以上が望ましく、蓄電デバイス１０の軽量化を考慮して４００μｍ以下が望ましい。包装材１５及び包装材２５の厚みとしてより好ましくは５０μｍ～２００μｍ程度、さらに好ましくは９０μｍ～１６０μｍ程度が挙げられる。 FIG. 7 is a cross-sectional view showing a laminated structure of the packaging material 15. The packaging material 25 has the same laminated structure as the packaging material 15. The packaging material 15 and the packaging material 25 are formed by laminating a base material layer 34, a barrier layer 36, and a thermosetting resin layer 38 in this order. The thickness of the packaging material 15 and the packaging material 25 is preferably 50 μm or more in consideration of strength, and 400 μm or less in consideration of weight reduction of the power storage device 10. The thickness of the packaging material 15 and the packaging material 25 is more preferably about 50 μm to 200 μm, and further preferably about 90 μm to 160 μm.

　基材層３４は包装材１５、２５の基材として機能する層であり、外装部材２０の最外層側を形成する層である。基材層３４は絶縁性を有し、ポリアミド、ポリエステル、エポキシ、アクリル、フッ素樹脂、ポリウレタン、珪素樹脂、フェノール、ポリエーテルイミド、ポリイミド、ポリカーボネート及びこれらの混合物や共重合物等により形成される。基材層３４をこれらの樹脂フィルムにより形成してもよく、これらの樹脂を塗布して形成してもよい。 The base material layer 34 is a layer that functions as a base material for the packaging materials 15 and 25, and is a layer that forms the outermost layer side of the exterior member 20. The base material layer 34 has insulating properties and is formed of polyamide, polyester, epoxy, acrylic, fluororesin, polyurethane, silicon resin, phenol, polyetherimide, polyimide, polycarbonate, a mixture thereof, a copolymer, or the like. The base material layer 34 may be formed of these resin films, or may be formed by applying these resins.

　基材層３４を形成する樹脂フィルムは未延伸フィルムであってもよく、延伸フィルムであってもよい。延伸フィルムとして、一軸延伸フィルム、二軸延伸フィルムが挙げられ、二軸延伸フィルムが好ましい。二軸延伸フィルムを形成する延伸方法として、例えば逐次二軸延伸法、インフレーション法、同時二軸延伸法等が挙げられる。 The resin film forming the base material layer 34 may be an unstretched film or a stretched film. Examples of the stretched film include a uniaxially stretched film and a biaxially stretched film, and a biaxially stretched film is preferable. Examples of the stretching method for forming the biaxially stretched film include a sequential biaxial stretching method, an inflation method, and a simultaneous biaxial stretching method.

　更に、基材層３４は単層であってもよく、２層以上の積層体により構成されていてもよい。基材層３４が２層以上に構成されている場合、樹脂フィルムを接着剤等で積層した積層体であってもよく、樹脂を共押出しして２層以上とした樹脂フィルムの積層体であってもよい。樹脂フィルムを積層する接着剤としてポリウレタン系、アクリル系等の接着剤を用いることができる。 Further, the base material layer 34 may be a single layer or may be composed of a laminate of two or more layers. When the base material layer 34 is composed of two or more layers, it may be a laminate in which resin films are laminated with an adhesive or the like, or a laminate of resin films in which the resin is co-extruded to form two or more layers. You may. A polyurethane-based adhesive, an acrylic-based adhesive, or the like can be used as the adhesive for laminating the resin film.

　また、樹脂を共押出しして２層以上とした樹脂フィルムの積層体を未延伸のまま基材層３４としてもよく、一軸延伸または二軸延伸して基材層３４としてもよい。耐ピンホール性、絶縁性等の向上のために、異なる素材の樹脂フィルムを複数積層して基材層３４を形成してもよい。 Further, the laminated body of the resin film obtained by co-extruding the resin into two or more layers may be used as the base material layer 34 without being stretched, or may be uniaxially or biaxially stretched to form the base material layer 34. In order to improve pinhole resistance, insulation, etc., a plurality of resin films made of different materials may be laminated to form the base material layer 34.

　２層以上の樹脂フィルムの積層体により形成される基材層３４の具体例として、ポリエステルフィルムとナイロンフィルムとの積層体、２層以上のナイロンフィルムの積層体、２層以上のポリエステルフィルムの積層体等が挙げられる。延伸ナイロンフィルムと延伸ポリエステルフィルムとの積層体、２層以上の延伸ナイロンフィルムの積層体、２層以上の延伸ポリエステルフィルムの積層体が好ましい。 As a specific example of the base material layer 34 formed by a laminate of two or more layers of resin film, a laminate of a polyester film and a nylon film, a laminate of two or more layers of nylon film, and a laminate of two or more layers of polyester film. The body etc. can be mentioned. A laminate of a stretched nylon film and a stretched polyester film, a laminate of two or more layers of stretched nylon film, and a laminate of two or more layers of stretched polyester film are preferable.

　例えば、基材層３４が２層の場合、ポリエステルフィルムとポリエステルフィルムの積層体、ポリアミドフィルムとポリアミドフィルムの積層体、またはポリエステルフィルムとポリアミドフィルムの積層体が好ましい。より具体的には、ポリエチレンテレフタレートフィルムとポリエチレンテレフタレートフィルムの積層体、ナイロンフィルムとナイロンフィルムの積層体、ポリエチレンテレフタレートフィルムとナイロンフィルムの積層体がより好ましい。また、ポリエステル樹脂は、基材層３４の最外層に位置することが好ましい。 For example, when the base material layer 34 is two layers, a laminate of polyester film and polyester film, a laminate of polyamide film and polyamide film, or a laminate of polyester film and polyamide film is preferable. More specifically, a laminate of a polyethylene terephthalate film and a polyethylene terephthalate film, a laminate of a nylon film and a nylon film, and a laminate of a polyethylene terephthalate film and a nylon film are more preferable. Further, the polyester resin is preferably located in the outermost layer of the base material layer 34.

　基材層３４の厚みは例えば、３～７５μｍ程度に形成される。より好ましくは３～５０μｍ程度、更に好ましくは１０～３５μｍが挙げられる。本実施形態では、ポリエチレンテレフタレート（厚み１２μｍ）とナイロン（厚み１５μｍ）とを接着剤（厚み４μｍ）により積層して基材層３４を形成している。 The thickness of the base material layer 34 is formed to be, for example, about 3 to 75 μm. More preferably, it is about 3 to 50 μm, and further preferably 10 to 35 μm. In the present embodiment, polyethylene terephthalate (thickness 12 μm) and nylon (thickness 15 μm) are laminated with an adhesive (thickness 4 μm) to form a base material layer 34.

　バリア層３６は金属箔により形成され、水蒸気、酸素、光等の侵入を防止する。バリア層３６を形成する金属として、アルミニウム、アルミニウム合金、ステンレス鋼、チタン等を用いることができる。バリア層３６の厚みは例えば、１０～３００μｍに形成される。より好ましくは１０～１００μｍ程度、更に好ましくは２０～８０μｍ程度が挙げられる。 The barrier layer 36 is formed of metal foil to prevent the intrusion of water vapor, oxygen, light, etc. As the metal forming the barrier layer 36, aluminum, aluminum alloy, stainless steel, titanium and the like can be used. The thickness of the barrier layer 36 is formed to be, for example, 10 to 300 μm. More preferably, it is about 10 to 100 μm, and further preferably about 20 to 80 μm.

　各包装材の製造時に皺やピンホールが発生することを防止する観点から、バリア層３６は焼きなまし処理済みのアルミニウム（ＪＩＳ　Ｈ４１６０：１９９４　Ａ８０２１Ｈ－Ｏ、ＪＩＳ　Ｈ４１６０：１９９４　Ａ８０７９Ｈ－Ｏ、ＪＩＳ　Ｈ４０００：２０１４　Ａ８０２１Ｐ－Ｏ、ＪＩＳ　Ｈ４０００：２０１４　Ａ８０７９Ｐ－Ｏ）等の軟質アルミニウム箔により形成するとより好ましい。本実施形態では厚み４０μｍの軟質アルミニウム箔によりバリア層３６を形成している。 From the viewpoint of preventing wrinkles and pinholes from occurring during the production of each packaging material, the barrier layer 36 is annealed aluminum (JIS H4160: 1994 A8021HO, JIS H4160: 1994 A8079HO, JIS H4000: 2014). It is more preferable to form it with a soft aluminum foil such as A8021P-O, JIS H4000: 2014 A8079P-O). In this embodiment, the barrier layer 36 is formed of a soft aluminum foil having a thickness of 40 μm.

　尚、バリア層３６を金属蒸着膜、無機酸化物蒸着膜、炭素含有無機酸化物蒸着膜、及び、これらの蒸着膜を設けた樹脂フィルムにより形成してもよい。 The barrier layer 36 may be formed of a metal vapor deposition film, an inorganic oxide vapor deposition film, a carbon-containing inorganic oxide vapor deposition film, and a resin film provided with these vapor deposition films.

　基材層３４とバリア層３６とはポリウレタン系、アクリル系等の接着剤（不図示）により接着される。接着剤は２液硬化型接着剤であってもよく、１液硬化型接着剤であってもよい。また、接着剤の接着機構は、特に制限されず、化学反応型、溶剤揮発型、熱溶融型及び熱圧着型等のいずれであってもよい。接着剤の厚みは、例えば１～１０μｍ程度、好ましくは２～５μｍ程度が挙げられる。 The base material layer 34 and the barrier layer 36 are adhered with an adhesive (not shown) such as polyurethane or acrylic. The adhesive may be a two-component curable adhesive or a one-component curable adhesive. The adhesive mechanism of the adhesive is not particularly limited, and may be any of a chemical reaction type, a solvent volatilization type, a heat melting type, a thermocompression bonding type, and the like. The thickness of the adhesive is, for example, about 1 to 10 μm, preferably about 2 to 5 μm.

　熱接着性樹脂層３８は外装部材２０の最内層を形成し、外装部材２０の周縁において対向する熱接着性樹脂層３８を熱接着することにより外装部材２０を封止する。また、熱接着性樹脂が一定の膜厚以上でバリア層３６を覆うことで、電解液とバリア層３６の金属との絶縁性を保つことができる。 The thermosetting resin layer 38 forms the innermost layer of the exterior member 20, and the exterior member 20 is sealed by heat-bonding the thermosetting resin layers 38 facing each other at the peripheral edge of the exterior member 20. Further, by covering the barrier layer 36 with a thermosetting resin having a certain film thickness or more, the insulating property between the electrolytic solution and the metal of the barrier layer 36 can be maintained.

　熱接着性樹脂層３８は熱接着性を有する樹脂であればよく、例えばポリオレフィン、酸変性ポリオレフィン等の熱接着性樹脂により形成される。異なる素材の樹脂を複数積層して熱接着性樹脂層３８を形成してもよい。 The heat-adhesive resin layer 38 may be any resin having heat-adhesiveness, and is formed of, for example, a heat-adhesive resin such as polyolefin or acid-modified polyolefin. A plurality of resins of different materials may be laminated to form the thermosetting resin layer 38.

　ポリオレフィンとして、ポリエチレン、ポリプロピレン、エチレン－ブテン－プロピレンのターポリマー等が挙げられる。ポリエチレンとして、低密度ポリエチレン、中密度ポリエチレン、高密度ポリエチレン、線状低密度ポリエチレン等が挙げられる。ポリプロピレンとして、ホモポリプロピレン、ポリプロピレンのブロックコポリマー（たとえば、プロピレンとエチレンのブロックコポリマー）、ポリプロピレンのランダムコポリマー（たとえば、プロピレンとエチレンのランダムコポリマー）等の結晶性または非晶性のポリプロピレンが挙げられる。 Examples of the polyolefin include polyethylene, polypropylene, ethylene-butene-propylene terpolymer and the like. Examples of polyethylene include low-density polyethylene, medium-density polyethylene, high-density polyethylene, and linear low-density polyethylene. Examples of polypropylene include crystalline or amorphous polypropylenes such as homopolypropylene, polypropylene block copolymers (eg, propylene and ethylene block copolymers), and polypropylene random copolymers (eg, propylene and ethylene random copolymers).

　また、酸変性ポリオレフィンとしては、酸変性されたポリオレフィンであれば特に制限されない。好ましくは不飽和カルボン酸またはその無水物でグラフト変性されたポリオレフィンが挙げられる。 The acid-modified polyolefin is not particularly limited as long as it is an acid-modified polyolefin. Preferred are polyolefins graft-modified with unsaturated carboxylic acids or anhydrides thereof.

　熱接着性樹脂層３８の厚みは例えば、１０～１００μｍに形成される。より好ましくは１５～９０μｍ程度、さらに好ましくは３０～８０μｍ程度が挙げられる。熱接着性樹脂層３８はバリア層３６上に押出して形成される。 The thickness of the thermosetting resin layer 38 is formed to be, for example, 10 to 100 μm. More preferably, it is about 15 to 90 μm, and further preferably about 30 to 80 μm. The thermosetting resin layer 38 is formed by extruding onto the barrier layer 36.

　本実施形態では、バリア層３６上に酸変性ポリプロピレン（厚み４０μｍ）、ポリプロピレン（厚み４０μｍ）を順に押出して熱接着性樹脂層３８を形成している。 In the present embodiment, the acid-modified polypropylene (thickness 40 μm) and polypropylene (thickness 40 μm) are extruded in order on the barrier layer 36 to form the thermosetting resin layer 38.

　尚、熱接着性樹脂層３８を形成するフィルムをバリア層３６上に接着剤により接着してもよい。例えば、酸変性ポリオレフィンを含む樹脂組成物の接着剤によりバリア層３６と熱接着性樹脂層３８とを接着することができる。酸変性ポリオレフィンは特に制限されないが、好ましくは不飽和カルボン酸又はその無水物でグラフト変性されたポリオレフィンが挙げられる。接着剤の厚みは例えば、１～５０μｍ、好ましくは２～４０μｍ程度が挙げられる。 The film forming the thermosetting resin layer 38 may be adhered on the barrier layer 36 with an adhesive. For example, the barrier layer 36 and the thermosetting resin layer 38 can be adhered to each other by an adhesive of a resin composition containing an acid-modified polyolefin. The acid-modified polyolefin is not particularly limited, but preferably an unsaturated carboxylic acid or a polyolefin graft-modified with an anhydride thereof. The thickness of the adhesive is, for example, 1 to 50 μm, preferably about 2 to 40 μm.

　図４、図５、図６において、包装材２５は矩形のシート状に形成される。包装材１５は収納部１６及びフランジ部１７を有している。収納部１６は一面に略矩形の開口部１６ａを開口し、蓄電素子１１を収納する。フランジ部１７は開口部１６ａの周縁から外周側に突出した環状に形成される。 In FIGS. 4, 5 and 6, the packaging material 25 is formed in the shape of a rectangular sheet. The packaging material 15 has a storage portion 16 and a flange portion 17. The storage portion 16 has a substantially rectangular opening 16a on one surface to store the power storage element 11. The flange portion 17 is formed in an annular shape protruding outward from the peripheral edge of the opening 16a.

　フランジ部１７及び包装材２５の対向する熱接着性樹脂層３８（図７参照）を熱接着することにより、収納部１６の周囲に沿う環状の周縁シール部２１が形成される。この時、弁装置５０が周縁シール部２１に熱接着して固定され、電極端子１２、１３がタブフィルム１２ａ、１３ａを介して周縁シール部２１に熱接着して固定される。これにより、収納部１６が周縁シール部２１の内縁から所定の深さに形成され、周縁シール部２１によって封止される。 By heat-bonding the opposing thermosetting resin layers 38 (see FIG. 7) of the flange portion 17 and the packaging material 25, an annular peripheral edge sealing portion 21 along the periphery of the storage portion 16 is formed. At this time, the valve device 50 is heat-bonded and fixed to the peripheral edge sealing portion 21, and the electrode terminals 12 and 13 are heat-bonded and fixed to the peripheral edge sealing portion 21 via the tab films 12a and 13a. As a result, the accommodating portion 16 is formed to a predetermined depth from the inner edge of the peripheral edge sealing portion 21, and is sealed by the peripheral edge sealing portion 21.

　包装材１５は冷間成形によってフランジ部１７に対して収納部１６を所定の深さに凹設して形成される。この時、収納部１６は深さ方向に垂直な面内で一方向に延びた略矩形に形成される。フランジ部１７は収納部１６に沿って環状に設けられ、フランジ部１７の外形は包装材２５と略同じ大きさの略矩形に形成される。これにより、外装部材２０は収納部１６は深さ方向から見て略矩形に形成される。 The packaging material 15 is formed by cold forming a storage portion 16 recessed with respect to the flange portion 17 to a predetermined depth. At this time, the storage portion 16 is formed in a substantially rectangular shape extending in one direction in a plane perpendicular to the depth direction. The flange portion 17 is provided in an annular shape along the storage portion 16, and the outer shape of the flange portion 17 is formed into a substantially rectangular shape having substantially the same size as the packaging material 25. As a result, the housing portion 16 of the exterior member 20 is formed in a substantially rectangular shape when viewed from the depth direction.

　収納部１６の深さは成形時のクラック等が発生しないように包装材１５のバリア層３６の厚みに応じて決められる。本実施形態では４０μｍの厚みのバリア層３６に対して収納部１６の深さを５ｍｍ～１０ｍｍに形成している。この時、収納部１６の深さ方向に垂直な面内の各コーナーＲは例えば約３ｍｍ、深さ方向に平行な面内の各コーナーＲは例えば約１．５ｍｍに形成される。尚、バリア層３６の厚みを大きくすることにより、収納部１６の深さを例えば、５ｍｍ～３０ｍｍに形成することができる。 The depth of the storage portion 16 is determined according to the thickness of the barrier layer 36 of the packaging material 15 so that cracks and the like do not occur during molding. In the present embodiment, the depth of the storage portion 16 is formed to be 5 mm to 10 mm with respect to the barrier layer 36 having a thickness of 40 μm. At this time, each corner R in the plane perpendicular to the depth direction of the storage portion 16 is formed to be, for example, about 3 mm, and each corner R in the plane parallel to the depth direction is formed to be, for example, about 1.5 mm. By increasing the thickness of the barrier layer 36, the depth of the storage portion 16 can be formed to, for example, 5 mm to 30 mm.

　図８は図５のＡ－Ａ断面図を示している。電極端子１２、１３は外装部材２０の後述する周縁シール部２１上でタブフィルム１２ａ、１３ａを介して包装材１５、２５に挟まれている。 FIG. 8 shows a cross-sectional view taken along the line AA of FIG. The electrode terminals 12 and 13 are sandwiched between the packaging materials 15 and 25 via the tab films 12a and 13a on the peripheral edge sealing portion 21 described later of the exterior member 20.

　タブフィルム１２ａ、１３ａは、接着性保護フィルムであり、包装材１５、２５及び金属の電極端子１２、１３の両方と接着するように構成されている。タブフィルム１２ａ、１３ａを介することによって、金属製の電極端子１２、１３を包装材１５、２５で固定することができる。また、タブフィルム１２ａ、１３ａは、特に高電圧で用いる場合、絶縁層、耐熱層あるいは耐熱成分を含み、短絡防止機能を有することが好ましい。 The tab films 12a and 13a are adhesive protective films, and are configured to adhere to both the packaging materials 15 and 25 and the metal electrode terminals 12 and 13. The metal electrode terminals 12 and 13 can be fixed by the packaging materials 15 and 25 via the tab films 12a and 13a. Further, the tab films 12a and 13a preferably include an insulating layer, a heat resistant layer or a heat resistant component and have a short circuit prevention function, particularly when used at a high voltage.

　図９は図５のＢ－Ｂ断面図を示している。収納部１６は周縁シール部２１の内側端縁Ｐ２よりも内側に配置されており、フランジ部１７の内側端縁Ｐ３から立ち上がる。従って、収納部１６は周縁シール部２１よりもＹ方向（図６参照）に膨出して形成されている。この例では、周縁シール部２１の内側端縁Ｐ２とフランジ部１７の内側端縁Ｐ３（言い換えると、収納部１６の外側端縁）とは一致している。尚、図中、斜線の領域は周縁シール部２１において熱接着されている部分である。 FIG. 9 shows a cross-sectional view taken along the line BB of FIG. The storage portion 16 is arranged inside the inner edge P2 of the peripheral edge seal portion 21 and rises from the inner edge P3 of the flange portion 17. Therefore, the storage portion 16 is formed so as to bulge in the Y direction (see FIG. 6) from the peripheral seal portion 21. In this example, the inner edge P2 of the peripheral edge seal portion 21 and the inner edge P3 of the flange portion 17 (in other words, the outer edge of the storage portion 16) coincide with each other. In the figure, the shaded area is a portion of the peripheral seal portion 21 that is heat-bonded.

　図１０は、他の例の外装部材２０における図５のＢ－Ｂ断面図を示している。同図に示すように、周縁シール部２１の内側端縁Ｐ２は、フランジ部１７の内側端縁Ｐ３（言い換えると、収納部１６の外側端縁）よりも外側に位置していてもよい。 FIG. 10 shows a cross-sectional view taken along the line BB of FIG. 5 in the exterior member 20 of another example. As shown in the figure, the inner edge P2 of the peripheral edge seal portion 21 may be located outside the inner edge P3 of the flange portion 17 (in other words, the outer edge of the storage portion 16).

　蓄電デバイス１０は収納部１６の深さ方向（Ｙ方向）を電動自動車１の前後方向に配置される。また、収納部１６の深さ方向に垂直な面内の長手方向（Ｘ方向、第１方向）を電動自動車１の左右方向に配置され、短手方向（Ｚ方向、第２方向）を電動自動車１の高さ方向に配置される。即ち、収納部１６の深さ方向に直交するＸ方向を電動自動車１の左右方向に配置され、収納部１６の深さ方向及びＸ方向に直交するＺ方向を電動自動車１の高さ方向に配置される。 The power storage device 10 is arranged in the depth direction (Y direction) of the storage unit 16 in the front-rear direction of the electric vehicle 1. Further, the longitudinal direction (X direction, first direction) in the plane perpendicular to the depth direction of the storage portion 16 is arranged in the left-right direction of the electric vehicle 1, and the lateral direction (Z direction, second direction) is the electric vehicle. It is arranged in the height direction of 1. That is, the X direction orthogonal to the depth direction of the storage portion 16 is arranged in the left-right direction of the electric vehicle 1, and the depth direction of the storage portion 16 and the Z direction orthogonal to the X direction are arranged in the height direction of the electric vehicle 1. Will be done.

　図１１は弁装置５０の正面図を示している。弁装置５０は外装部材２０の内部と連通し、外装部材２０内で発生したガスに起因して外装部材２０内の圧力が所定値以上となった場合に、ガスを外部に放出するように構成されている。即ち、弁装置５０は外装部材２０内の圧力を調整するためのガス抜き弁であり、繰り返しのガス抜きが可能な復帰弁である。 FIG. 11 shows a front view of the valve device 50. The valve device 50 communicates with the inside of the exterior member 20 and is configured to release the gas to the outside when the pressure inside the exterior member 20 exceeds a predetermined value due to the gas generated in the exterior member 20. Has been done. That is, the valve device 50 is a degassing valve for adjusting the pressure in the exterior member 20, and is a return valve capable of repeatedly degassing.

　弁装置５０は、収納部１６の深さ方向から見て略矩形に形成される外装部材２０の上辺に取り付けられ、弁機能部５２及び取付部６２を備えている。詳細については後述するが、取付部６２は少なくともその一部が包装材１５、２５（図４参照）に挟まれて固定されている。取付部６２が熱接着されることで、取付部６２の外側の周面と包装材１５、２５の最内層である熱接着性樹脂層３８とは熱接着して接合された状態となる。 The valve device 50 is attached to the upper side of the exterior member 20 formed in a substantially rectangular shape when viewed from the depth direction of the accommodating portion 16, and includes a valve function portion 52 and an attachment portion 62. Although the details will be described later, at least a part of the mounting portion 62 is sandwiched and fixed between the packaging materials 15 and 25 (see FIG. 4). When the mounting portion 62 is heat-bonded, the outer peripheral surface of the mounting portion 62 and the thermosetting resin layer 38, which is the innermost layer of the packaging materials 15 and 25, are heat-bonded and joined.

　弁機能部５２及び取付部６２はＺ方向に並び、弁機能部５２の下方に取付部６２が配置される。取付部６２は弁機能部５２の下端部（内端部）に接続されている。弁機能部５２及び取付部６２の外形は、それぞれＺ方向に平行な中心軸Ｃ１を有する略円柱形状であり、互いに同軸である。 The valve function portion 52 and the mounting portion 62 are arranged in the Z direction, and the mounting portion 62 is arranged below the valve function portion 52. The mounting portion 62 is connected to the lower end portion (inner end portion) of the valve function portion 52. The outer shapes of the valve function portion 52 and the mounting portion 62 each have a substantially cylindrical shape having a central axis C1 parallel to the Z direction, and are coaxial with each other.

　取付部６２の弁機能部５２側とは反対側の先端（下端）の外周部にはコーナーＲ（例えば、Ｒ＝０．２ｍｍ～２．０ｍｍ）が形成されている。即ち、取付部６２の先端（下端）の外周側の角が丸みを帯びている。弁装置５０の筐体５１の形成時に面取り加工によりコーナーＲを形成してもよく、樹脂成形加工により筐体５１をコーナーＲを備えた形状に形成してもよい。 A corner R (for example, R = 0.2 mm to 2.0 mm) is formed on the outer peripheral portion of the tip (lower end) of the mounting portion 62 opposite to the valve function portion 52 side. That is, the outer peripheral corner of the tip (lower end) of the mounting portion 62 is rounded. The corner R may be formed by chamfering when the housing 51 of the valve device 50 is formed, or the housing 51 may be formed into a shape having the corner R by resin molding.

　図１２は図１１のＥ－Ｅ断面図であり、弁装置５０の横断面図を示している。弁装置５０の弁機能部５２及び取付部６２の外形は断面円形に形成される。取付部６２は全体としては略円筒形状であり、取付部６２の内部には通気路６３が形成されている。通気路６３は、Ｚ方向に沿って延びる。通気路６３は断面円形であり、通気路６３の中心は中心軸Ｃ１上に配される。取付部６２の中心軸Ｃ１を中心とする径方向の厚みは、周方向に沿って概ね一定である。尚、通気路６３の断面形状を多角形に形成してもよい。 FIG. 12 is a cross-sectional view taken along the line EE of FIG. 11 and shows a cross-sectional view of the valve device 50. The outer shape of the valve function portion 52 and the mounting portion 62 of the valve device 50 is formed to have a circular cross section. The mounting portion 62 has a substantially cylindrical shape as a whole, and a ventilation path 63 is formed inside the mounting portion 62. The vent 63 extends along the Z direction. The air passage 63 has a circular cross section, and the center of the air passage 63 is arranged on the central axis C1. The thickness of the mounting portion 62 in the radial direction centered on the central axis C1 is substantially constant along the circumferential direction. The cross-sectional shape of the ventilation passage 63 may be formed into a polygon.

　収納部１６（図６参照）の深さ方向（Ｙ方向）における弁機能部５２の長さＬ２は取付部６２の長さＬ１よりも長い。中心軸Ｃ１に垂直な面内で収納部１６（図５参照）の深さ方向に直交する方向（Ｘ方向）における弁機能部５２の長さＬ２は取付部６２の長さＬ１よりも長い。即ち、弁機能部５２の外形の直径は取付部６２の外形の直径よりも長く、中心軸Ｃ１に垂直な断面における弁機能部５２の断面積は取付部６２の断面積より大きい。 The length L2 of the valve function portion 52 in the depth direction (Y direction) of the storage portion 16 (see FIG. 6) is longer than the length L1 of the mounting portion 62. The length L2 of the valve function portion 52 in the direction (X direction) orthogonal to the depth direction of the storage portion 16 (see FIG. 5) in the plane perpendicular to the central axis C1 is longer than the length L1 of the mounting portion 62. That is, the outer diameter of the valve function portion 52 is longer than the outer diameter of the mounting portion 62, and the cross-sectional area of the valve function portion 52 in the cross section perpendicular to the central axis C1 is larger than the cross-sectional area of the mounting portion 62.

　また、弁装置５０をＺ方向に視たとき、取付部６２の外形は弁機能部５２の外形に包含される。言い換えると、弁装置５０をＺ方向に視たとき、弁機能部５２は取付部６２の外形から、収納部１６（図５参照）の深さ方向を含む各方向にはみ出している。その結果、弁機能部５２と取付部６２との境界には段差５１ｃが形成されている（図１１参照）。この段差５１ｃにより、弁装置５０は取付部６２から弁機能部５２に向かって不連続に拡径する形状となる。 Further, when the valve device 50 is viewed in the Z direction, the outer shape of the mounting portion 62 is included in the outer shape of the valve function portion 52. In other words, when the valve device 50 is viewed in the Z direction, the valve function portion 52 protrudes from the outer shape of the mounting portion 62 in each direction including the depth direction of the storage portion 16 (see FIG. 5). As a result, a step 51c is formed at the boundary between the valve function portion 52 and the mounting portion 62 (see FIG. 11). Due to this step 51c, the valve device 50 has a shape in which the diameter is discontinuously expanded from the mounting portion 62 toward the valve function portion 52.

　図１３は、図１１のＦ－Ｆ断面図であり、弁装置５０の縦断面図を示している。前述したように、取付部６２の先端部（下端部）の外周面上には、コーナーＲが形成されている。取付部６２の内部には、上下方向（Ｚ方向）に延びる通気路６３が形成されている。通気路６３は外装部材２０内において発生したガスを弁機能部５２へ誘導する。 FIG. 13 is a sectional view taken along the line FF of FIG. 11 and shows a vertical sectional view of the valve device 50. As described above, a corner R is formed on the outer peripheral surface of the tip end portion (lower end portion) of the mounting portion 62. A ventilation path 63 extending in the vertical direction (Z direction) is formed inside the mounting portion 62. The ventilation passage 63 guides the gas generated in the exterior member 20 to the valve function portion 52.

　弁機能部５２の内部には、外装部材２０（図５参照）内において発生したガスを外装部材２０外へ排出するように構成された弁機構が設けられている。具体的には、弁機能部５２は、Ｏリング５３と、ボール５４と、バネ５６と、メンブレン５８とを含んでいる。即ち、弁機能部５２には、ボールスプリング型の弁機構が設けられている。 Inside the valve function unit 52, a valve mechanism configured to discharge the gas generated in the exterior member 20 (see FIG. 5) to the outside of the exterior member 20 is provided. Specifically, the valve function portion 52 includes an O-ring 53, a ball 54, a spring 56, and a membrane 58. That is, the valve function portion 52 is provided with a ball spring type valve mechanism.

　尚、本実施形態の弁装置５０は繰り返しのガス抜きが可能な複雑な弁機構を必要とする復帰弁としているが、１回限りのガス抜きが可能なより簡便な弁機構で十分な破壊弁としてもよく、選択透過弁であってもよい。弁機能部５２内に設けられる弁機構は、ガスに起因して上昇した外装部材２０内の圧力を１回だけ或いは複数回にわたり繰り返し低減可能であれば特に制限されず、たとえば、ポペット型、ダックビル型、アンブレラ型、ダイヤフラム型等の弁機構であってもよい。 The valve device 50 of the present embodiment is a return valve that requires a complicated valve mechanism capable of repeatedly degassing, but a simpler valve mechanism capable of degassing only once is sufficient. It may be a selective transmission valve. The valve mechanism provided in the valve function portion 52 is not particularly limited as long as the pressure in the exterior member 20 increased due to the gas can be repeatedly reduced only once or a plurality of times. For example, a poppet type or a duck building is used. A valve mechanism such as a mold, umbrella type, or diaphragm type may be used.

　弁装置５０の筐体５１は中心軸Ｃ１に沿って延びており、弁機能部５２及び取付部６２の外形を形成する。 The housing 51 of the valve device 50 extends along the central axis C1 and forms the outer shape of the valve function portion 52 and the mounting portion 62.

　筐体５１によって取付部６２内に通気路６３が形成され、弁機能部５２内に通気路６３に連通する空間Ｓ２が形成される。空間Ｓ２はＺ方向に貫通し、筐体５１の上面に排気口５１ｂが開口する。 A ventilation passage 63 is formed in the mounting portion 62 by the housing 51, and a space S2 communicating with the ventilation passage 63 is formed in the valve function portion 52. The space S2 penetrates in the Z direction, and an exhaust port 51b opens on the upper surface of the housing 51.

　空間Ｓ２内では、Ｏリング５３、ボール５４、バネ５６及びメンブレン５８が、上方に向かってこの順に配置されている。筐体５１は空間Ｓ２に面する弁座５１ａを有する。弁座５１ａは上方に向かって拡径する円錐面に形成される。弁座５１ａはバネ５６により付勢される弁体としてのボール５４を支持する。ボール５４がＯリング５３を介して弁座５１ａ上に着座すると、弁機能部５２の閉状態が形成される。 In the space S2, the O-ring 53, the ball 54, the spring 56, and the membrane 58 are arranged in this order upward. The housing 51 has a valve seat 51a facing the space S2. The valve seat 51a is formed on a conical surface whose diameter increases upward. The valve seat 51a supports the ball 54 as a valve body urged by the spring 56. When the ball 54 is seated on the valve seat 51a via the O-ring 53, a closed state of the valve function portion 52 is formed.

　Ｏリング５３は中空円形のリングであり、例えばフッ素ゴムによって形成されている。Ｏリング５３は弁座５１ａに着座したボール５４と弁座５１ａとの隙間をなくし、閉状態の密閉性を高めるのを補助する。 The O-ring 53 is a hollow circular ring, and is formed of, for example, fluororubber. The O-ring 53 eliminates the gap between the ball 54 seated on the valve seat 51a and the valve seat 51a, and assists in improving the airtightness in the closed state.

　ボール５４及びバネ５６は、例えばステンレス鋼によって形成されている。尚、ボール５４を樹脂により形成してもよい。 The ball 54 and the spring 56 are made of, for example, stainless steel. The ball 54 may be formed of resin.

　メンブレン５８は例えば０．０１～１μｍ程度のポアー直径（pore　diameter）を有したポリテトラフルオロエチレン（ＰＴＦＥ）によって形成されている。これにより、メンブレン５８は電解液を漏らさず、ガスのみを透過（選択透過）する。尚、ＰＴＦＥは柔らかい材質のため、強度が不足する場合はポリプロピレンやポリエステル等のメッシュや不織布と一体成型して補強したメンブレン５８を用いることもできる。 The membrane 58 is formed of, for example, polytetrafluoroethylene (PTFE) having a pore diameter of about 0.01 to 1 μm. As a result, the membrane 58 does not leak the electrolytic solution and permeates only the gas (selective permeation). Since PTFE is a soft material, if the strength is insufficient, a membrane 58 reinforced by integrally molding with a mesh such as polypropylene or polyester or a non-woven fabric can be used.

　弁装置５０が外装部材２０に取り付けられた状態で、外装部材２０内の圧力が所定圧力に達すると、通気路６３から誘導されたガスがボール５４をＺ方向（上方）に押圧する。ボール５４が押圧され、弁座５１ａから離れると、バネ５６が縮み、弁機能部５２の開状態が形成される。この開状態において、外装部材２０内のガスは、ボール５４とＯリング５３との間に形成された隙間を通り、メンブレン５８を透過して、排気口５１ｂから外装部材２０の外部に排出される。ガスが排出され、ボール５４をＺ方向に押圧する力が弱まると、バネ５６が延び、ボール５４をＺ方向（下方）に付勢する力がこれよりも大きくなる。その結果、再度、弁機能部５２の閉状態が形成される。 When the pressure inside the exterior member 20 reaches a predetermined pressure while the valve device 50 is attached to the exterior member 20, the gas induced from the ventilation passage 63 presses the ball 54 in the Z direction (upward). When the ball 54 is pressed and separated from the valve seat 51a, the spring 56 contracts and the valve function portion 52 is opened. In this open state, the gas in the exterior member 20 passes through the gap formed between the ball 54 and the O-ring 53, permeates the membrane 58, and is discharged to the outside of the exterior member 20 from the exhaust port 51b. .. When the gas is discharged and the force for pressing the ball 54 in the Z direction weakens, the spring 56 extends and the force for urging the ball 54 in the Z direction (downward) becomes larger than this. As a result, the closed state of the valve function portion 52 is formed again.

　図１４は図５のＤ－Ｄ断面図であり、弁装置５０の取付け状態を説明するための図である。図１５は図５のＨ部拡大図である。これらの図に示されるように、弁装置５０の弁機能部５２は周縁シール部２１の外側端縁Ｐ１よりも外側に位置している。一方、弁装置５０の取付部６２の一部分は、周縁シール部２１において包装材１５の熱接着性樹脂層３８と包装材２５の熱接着性樹脂層３８との間に挟まれている。そして、取付部６２の外側の周面と、包装材１５、２５の最内層である熱接着性樹脂層３８とは、互いに熱接着により接合された状態となっている。 FIG. 14 is a cross-sectional view taken along the line DD of FIG. 5 for explaining the mounting state of the valve device 50. FIG. 15 is an enlarged view of the H portion of FIG. As shown in these figures, the valve function portion 52 of the valve device 50 is located outside the outer edge P1 of the peripheral edge seal portion 21. On the other hand, a part of the attachment portion 62 of the valve device 50 is sandwiched between the thermosetting resin layer 38 of the packaging material 15 and the thermosetting resin layer 38 of the packaging material 25 at the peripheral seal portion 21. The outer peripheral surface of the mounting portion 62 and the thermosetting resin layer 38, which is the innermost layer of the packaging materials 15 and 25, are joined to each other by heat adhesion.

　尚、図１４は弁装置５０が熱接着性樹脂層３８と熱接着された状態であることを説明するため、熱接着性樹脂層３８は便宜的に周縁シール部２１付近のみに図示されるが、包装材１５、２５の全面に備えられている。 In addition, in order to explain that the valve device 50 is in a state of being heat-bonded to the thermosetting resin layer 38, FIG. 14 shows the thermosetting resin layer 38 only in the vicinity of the peripheral seal portion 21 for convenience. , It is provided on the entire surface of the packaging materials 15 and 25.

　取付部６２が熱接着性樹脂層３８に挟まれて弁装置５０が外装部材２０に取り付けられ、弁機能部５２が周縁シール部２１の外側に配される。弁機能部５２が熱接着性樹脂層３８に挟まれると、熱接着性樹脂層３８の熱接着時に加えられる熱及び圧力によって弁機能部５２内の弁機構が故障する可能性がある。このため、取付部６２を熱接着性樹脂層３８間に挟むことで熱接着時に弁機能部５２に大きい圧力及び熱が加えられず、弁機構の故障を抑制することができる。 The attachment portion 62 is sandwiched between the thermosetting resin layers 38, the valve device 50 is attached to the exterior member 20, and the valve function portion 52 is arranged outside the peripheral edge seal portion 21. If the valve function portion 52 is sandwiched between the thermosetting resin layer 38, the valve mechanism in the valve function portion 52 may be damaged by the heat and pressure applied during the heat bonding of the thermosetting resin layer 38. Therefore, by sandwiching the mounting portion 62 between the thermosetting resin layers 38, a large pressure and heat are not applied to the valve function portion 52 during thermal bonding, and failure of the valve mechanism can be suppressed.

　また、取付部６２の断面の直径が弁機能部５２の断面の直径よりも短い。このため、周縁シール部２１のＹ方向（収納部１６の深さ方向）の取付部６２上の長さＬ４と、取付部６２を挟まれていない部分の長さＬ３との差を小さくできる。 Further, the diameter of the cross section of the mounting portion 62 is shorter than the diameter of the cross section of the valve function portion 52. Therefore, the difference between the length L4 on the mounting portion 62 in the Y direction (depth direction of the storage portion 16) of the peripheral edge sealing portion 21 and the length L3 of the portion not sandwiching the mounting portion 62 can be reduced.

　長さＬ４と長さＬ３との差が大きいと、取付部６２の外側の周面と包装材１５、２５の最内層である熱接着性樹脂層３８とを隙間なく接合するために熱接着時の圧力を大きくする必要が生じる。このため、熱接着のために外装部材２０の周縁に加えられる圧力が大きくなり、取付部６２上や電極端子１２、１３上の熱接着性樹脂層３８が薄くなる可能性がある。その結果、蓄電デバイス１０の絶縁破壊が生じる可能性がある。 When the difference between the length L4 and the length L3 is large, the outer peripheral surface of the mounting portion 62 and the thermosetting resin layer 38, which is the innermost layer of the packaging materials 15 and 25, are bonded without gaps during thermal bonding. It becomes necessary to increase the pressure of. Therefore, the pressure applied to the peripheral edge of the exterior member 20 for thermal adhesion increases, and the thermosetting resin layer 38 on the mounting portion 62 and the electrode terminals 12 and 13 may become thin. As a result, dielectric breakdown of the power storage device 10 may occur.

　本実施形態では長さＬ４と長さＬ３との差を小さくすることにより、熱接着時に外装部材２０の周縁全体に加えられる圧力を小さくできる。このため、蓄電デバイス１０の絶縁破壊を防止しつつ、対向する熱接着性樹脂層３８を適切に熱接着して取付部６２を外装部材２０に強固に固定することができる。 In the present embodiment, by reducing the difference between the length L4 and the length L3, the pressure applied to the entire peripheral edge of the exterior member 20 at the time of thermal bonding can be reduced. Therefore, the mounting portion 62 can be firmly fixed to the exterior member 20 by appropriately heat-bonding the opposing thermosetting resin layers 38 while preventing dielectric breakdown of the power storage device 10.

　図１５に示すように、弁装置５０の取付部６２は周縁シール部２１上に配される。弁機能部５２の内端部は周縁シール部２１の外側端縁Ｐ１に接しておらず、外側端縁Ｐ１から外側に間隔をあけて配される。 As shown in FIG. 15, the attachment portion 62 of the valve device 50 is arranged on the peripheral edge seal portion 21. The inner end portion of the valve function portion 52 is not in contact with the outer edge P1 of the peripheral edge seal portion 21, and is arranged at intervals from the outer edge P1 to the outside.

　取付部６２の内端６２ａは周縁シール部２１の内側端縁Ｐ２（フランジ部１７の内側端縁Ｐ３に一致する）まで達し、そこからさらに収納部１６に向かう方向に突出している。これにより、筐体５１の内端部には弁機構の閉状態において収納部１６に連通する開口が形成されている。 The inner end 62a of the mounting portion 62 reaches the inner edge P2 of the peripheral edge sealing portion 21 (corresponding to the inner edge P3 of the flange portion 17), and further protrudes in the direction toward the storage portion 16. As a result, an opening communicating with the storage portion 16 is formed at the inner end portion of the housing 51 in the closed state of the valve mechanism.

　取付部６２の内端６２ａが周縁シール部２１の内側端縁Ｐ２と面一または内側端縁Ｐ２よりも外側に位置すると、弁装置５０の機能的な不具合が生じる。即ち、周縁シール部２１の形成時に取付部６２に加えられる熱や圧力のために、取付部６２の内端部が変形する場合がある。また、溶融した包装材１５、２５の一部が取付部６２の通気路６３内に内端６２ａ側から入り込み、通気路６３が目詰まりする場合がある。これらの不具合が生じると、弁装置５０が正常に機能せず、故障する。 If the inner end 62a of the mounting portion 62 is located flush with the inner edge P2 of the peripheral seal portion 21 or outside the inner edge P2, a functional defect of the valve device 50 occurs. That is, the inner end portion of the mounting portion 62 may be deformed due to the heat or pressure applied to the mounting portion 62 when the peripheral edge sealing portion 21 is formed. Further, a part of the melted packaging materials 15 and 25 may enter the ventilation passage 63 of the mounting portion 62 from the inner end 62a side, and the ventilation passage 63 may be clogged. When these problems occur, the valve device 50 does not function normally and fails.

　しかし、本実施形態では取付部６２の内端６２ａが周縁シール部２１の内側端縁Ｐ２よりも内側に存在する。このため、周縁シール部２１の形成時に取付部６２の内端部を保護して傷を防止し、弁装置５０の故障を抑制することができる。 However, in the present embodiment, the inner end 62a of the mounting portion 62 exists inside the inner edge P2 of the peripheral edge sealing portion 21. Therefore, when the peripheral edge seal portion 21 is formed, the inner end portion of the mounting portion 62 can be protected to prevent scratches, and a failure of the valve device 50 can be suppressed.

　尚、前述の図１０に示すように、フランジ部１７の内側端縁Ｐ３が周縁シール部２１の内側端縁Ｐ２よりも内側に配される場合も同様に、取付部６２の内端６２ａが周縁シール部２１の内側端縁Ｐ２よりも内側に存在する。これにより、取付部６２の内端部を保護して傷を防止し、弁装置５０の故障を抑制することができる。 As shown in FIG. 10, when the inner edge P3 of the flange portion 17 is arranged inside the inner edge P2 of the peripheral edge seal portion 21, the inner end 62a of the mounting portion 62 is similarly arranged on the peripheral edge. It exists inside the inner edge P2 of the seal portion 21. As a result, the inner end portion of the mounting portion 62 can be protected to prevent scratches, and failure of the valve device 50 can be suppressed.

　この時、取付部６２の内端６２ａがフランジ部１７の内側端縁Ｐ３と周縁シール部２１の内側端縁Ｐ２との間に配されてもよいが、フランジ部１７の内側端縁Ｐ３から収納部１６に向かう方向に突出するとより望ましい。これにより、弁装置５０の故障をより確実に抑制することができる。 At this time, the inner end 62a of the mounting portion 62 may be arranged between the inner edge P3 of the flange portion 17 and the inner edge P2 of the peripheral edge seal portion 21, but is stored from the inner edge P3 of the flange portion 17. It is more desirable to project in the direction toward the portion 16. As a result, the failure of the valve device 50 can be suppressed more reliably.

　また、取付部６２の内端部の外周部にコーナーＲ（図１１参照）が形成され、外周側の角が丸みを帯びている。これにより、取付部６２の内端部が蓄電素子１１に接触しても蓄電素子１１を傷つける可能性を低くすることができる。また、取付部６２の内端部の外周面上のコーナーＲにより、取付部６２の内端部との接触による包装材１５、２５の熱接着性樹脂層３８の傷を防止することができる。 Further, a corner R (see FIG. 11) is formed on the outer peripheral portion of the inner end portion of the mounting portion 62, and the corner on the outer peripheral side is rounded. As a result, even if the inner end portion of the mounting portion 62 comes into contact with the power storage element 11, the possibility of damaging the power storage element 11 can be reduced. Further, the corners R on the outer peripheral surface of the inner end portion of the mounting portion 62 can prevent the thermosetting resin layers 38 of the packaging materials 15 and 25 from being scratched due to contact with the inner end portion of the mounting portion 62.

　尚、取付部６２の内端部のコーナーＲを省いてもよい。また、取付部６２の内端部の内周面上にコーナーＲを設けてもよい。これにより、取付部６２の内周側の角が削れて樹脂片が外装部材２０内に落下する可能性を低減することができる。 The corner R at the inner end of the mounting portion 62 may be omitted. Further, a corner R may be provided on the inner peripheral surface of the inner end portion of the mounting portion 62. As a result, it is possible to reduce the possibility that the corner on the inner peripheral side of the mounting portion 62 is scraped and the resin piece falls into the exterior member 20.

　図１６は弁装置５０の他の取り付け例を示し、図５のＨ部拡大図を示している。同図によると、弁機能部５２の内端部が周縁シール部２１の外側端縁Ｐ１に接して弁装置５０が取り付けられる。この場合、弁機能部５２と取付部６２との間の段差５１ｃを利用することにより、周縁シール部２１に対する弁装置５０の位置決めを確実に行うことができる。従って、Ｚ方向の取付部６２の長さを周縁シール部２１のシール幅よりも長く設計しておくことで、取付部６２の内端６２ａを周縁シール部２１の内側端縁Ｐ２から確実に突出させることができる。 FIG. 16 shows another mounting example of the valve device 50, and shows an enlarged view of the H portion of FIG. According to the figure, the valve device 50 is attached so that the inner end portion of the valve function portion 52 is in contact with the outer end edge P1 of the peripheral edge seal portion 21. In this case, the valve device 50 can be reliably positioned with respect to the peripheral seal portion 21 by using the step 51c between the valve function portion 52 and the mounting portion 62. Therefore, by designing the length of the mounting portion 62 in the Z direction to be longer than the sealing width of the peripheral edge sealing portion 21, the inner end 62a of the mounting portion 62 surely protrudes from the inner edge P2 of the peripheral edge sealing portion 21. Can be made to.

　前述したように、蓄電デバイス１０は収納部１６の深さ方向（Ｙ方向）を電動自動車１の前後方向に配置される。また、収納部１６の深さ方向に垂直な面内の長手方向（Ｘ方向、第１方向）を電動自動車１の左右方向に配置され、短手方向（Ｚ方向、第２方向）を電動自動車１の高さ方向に配置される（図１～図６参照）。 As described above, the power storage device 10 is arranged in the depth direction (Y direction) of the storage unit 16 in the front-rear direction of the electric vehicle 1. Further, the longitudinal direction (X direction, first direction) in the plane perpendicular to the depth direction of the storage portion 16 is arranged in the left-right direction of the electric vehicle 1, and the lateral direction (Z direction, second direction) is the electric vehicle. It is arranged in the height direction of 1 (see FIGS. 1 to 6).

　収納部１６は冷間成形により形成されるため深さを大きくすることが困難である。これに対して、収納部１６は深さ方向に垂直な面内で直交する２方向の長さＡｘ、Ａｚ（図４参照）を深さ方向の長さＡｙ（図４参照）よりも容易に大きくすることができる。このため、収納部１６の深さ方向（Ｙ方向）を電動自動車１の前後方向に配置することにより、複数の蓄電デバイス１０を積み重ねずに電動自動車１に設置して所望の電力を供給することができる。従って、積み重ねた際の加重による外装部材２０の破損を防止することができ、蓄電デバイス１０の信頼性を向上することができる。 Since the storage portion 16 is formed by cold molding, it is difficult to increase the depth. On the other hand, the accommodating portion 16 makes the lengths Ax and Az (see FIG. 4) orthogonal to each other in the plane perpendicular to the depth direction easier than the length Ay (see FIG. 4) in the depth direction. Can be made larger. Therefore, by arranging the depth direction (Y direction) of the storage portion 16 in the front-rear direction of the electric vehicle 1, the plurality of power storage devices 10 can be installed in the electric vehicle 1 without being stacked to supply desired electric power. Can be done. Therefore, it is possible to prevent the exterior member 20 from being damaged by the load when stacked, and it is possible to improve the reliability of the power storage device 10.

　加えて、電解質が電解液からなる場合は、蓄電デバイス１０を収納部１６の深さ方向（Ｙ方向）に積み重ねると包装材２５が加重により撓むため電解液が周部に押し出される。このため、中央部の正極板と負極板との間の電解液が不足し、蓄電デバイス１０のエネルギー密度が低下する。従って、収納部１６の深さ方向（Ｙ方向）を前後方向に配置し、電解液を含む蓄電デバイス１０のエネルギー密度の低下を防止することができる。 In addition, when the electrolyte is composed of an electrolytic solution, when the power storage devices 10 are stacked in the depth direction (Y direction) of the storage portion 16, the packaging material 25 bends due to the load, so that the electrolytic solution is pushed out to the peripheral portion. Therefore, the electrolytic solution between the positive electrode plate and the negative electrode plate in the central portion becomes insufficient, and the energy density of the power storage device 10 decreases. Therefore, the depth direction (Y direction) of the storage portion 16 can be arranged in the front-rear direction to prevent a decrease in the energy density of the power storage device 10 containing the electrolytic solution.

　また、収納部１６の深さ方向に垂直な面内の短手方向（Ｚ方向）を高さ方向に配置するため、蓄電デバイス１０の高さを小さくして電動自動車１の居住性を向上することができる。この時、収納部１６はＸ方向に長く延びてＸ方向の長さＡｘがＺ方向の長さＡｚよりも大きいため、高さを抑制して容量の大きい蓄電デバイス１０を得ることができる。 Further, since the lateral direction (Z direction) in the plane perpendicular to the depth direction of the storage portion 16 is arranged in the height direction, the height of the power storage device 10 is reduced to improve the comfort of the electric vehicle 1. be able to. At this time, since the storage portion 16 extends long in the X direction and the length Ax in the X direction is larger than the length Az in the Z direction, the height can be suppressed and the power storage device 10 having a large capacity can be obtained.

　収納部１６のＸ方向の長さＡｘはＺ方向の長さＡｚの２倍～３０倍に形成される。長さＡｘが長さＡｚの２倍よりも小さいと蓄電デバイス１０の容量が小さくなる。このため、長さＡｘを長さＡｚの２倍以上に形成し、蓄電デバイス１０の容量を大きくすることができる。また、長さＡｘが長さＡｚの３０倍を超えると包装材１５を容易に成形できないため歩留りが低下する。このため、長さＡｘを長さＡｚの３０倍以下に形成し、包装材１５の成形時の歩留りを向上することができる。 The length Ax of the storage portion 16 in the X direction is formed to be 2 to 30 times the length Az in the Z direction. If the length Ax is smaller than twice the length Az, the capacity of the power storage device 10 becomes small. Therefore, the length Ax can be formed to be twice or more the length Az, and the capacity of the power storage device 10 can be increased. Further, if the length Ax exceeds 30 times the length Az, the packaging material 15 cannot be easily molded, so that the yield is lowered. Therefore, the length Ax can be formed to be 30 times or less the length Az, and the yield of the packaging material 15 at the time of molding can be improved.

　また、Ｘ方向に延びる周縁シール部２１は一点鎖線２１’（図６参照）で示すように熱接着時にＺ方向に突出し、下端の周縁シール部２１が熱接着後に折曲して収納部１６の周壁上に重ねられる。これにより、蓄電デバイス１０の高さをより小さくすることができる。 Further, the peripheral edge sealing portion 21 extending in the X direction protrudes in the Z direction during thermal bonding as shown by the alternate long and short dash line 21'(see FIG. 6), and the peripheral edge sealing portion 21 at the lower end is bent after thermal bonding to form the storage portion 16. It is stacked on the peripheral wall. As a result, the height of the power storage device 10 can be made smaller.

　この時、積層体から成る包装材１５、２５の流れ方向（ＭＤ）はＺ方向（Ｘ方向に直交）に配される。積層体を流れ方向に平行に折曲すると金属箔のクラックや樹脂フィルムのピンホールが発生する可能性が高くなる。包装材１５、２５の流れ方向がＸ方向に直交するため、Ｘ方向に延びる周縁シール部２１を折曲した際に外装部材２０のクラック及びピンホールの発生を抑制することができる。 At this time, the flow directions (MD) of the packaging materials 15 and 25 made of the laminated body are arranged in the Z direction (orthogonal to the X direction). When the laminate is bent parallel to the flow direction, there is a high possibility that cracks in the metal foil and pinholes in the resin film will occur. Since the flow directions of the packaging materials 15 and 25 are orthogonal to the X direction, it is possible to suppress the occurrence of cracks and pinholes in the exterior member 20 when the peripheral edge seal portion 21 extending in the X direction is bent.

　包装材１５、２５の流れ方向（ＭＤ）は、バリア層３６の金属箔（アルミニウム合金箔等）の圧延方向（ＲＤ）に対応する。包装材１５、２５のＴＤは金属箔のＴＤに対応する。金属箔の圧延方向（ＲＤ）は圧延目により判別できる。 The flow direction (MD) of the packaging materials 15 and 25 corresponds to the rolling direction (RD) of the metal foil (aluminum alloy foil, etc.) of the barrier layer 36. The TDs of the packaging materials 15 and 25 correspond to the TDs of the metal foil. The rolling direction (RD) of the metal foil can be determined by the rolling stitches.

　また、包装材１５、２５の熱接着性樹脂層３８の複数の断面を電子顕微鏡で観察して海島構造を確認し、熱接着性樹脂層３８の厚み方向に垂直な方向の島の径の平均が最大であった断面と平行な方向をＭＤと判断することができる。金属箔の圧延目により包装材１５、２５のＭＤを特定できない場合に、この方法によりＭＤを特定することができる。 Further, the sea island structure was confirmed by observing a plurality of cross sections of the heat-adhesive resin layers 38 of the packaging materials 15 and 25 with an electron microscope, and the average diameter of the islands in the direction perpendicular to the thickness direction of the heat-adhesive resin layers 38 was averaged. The direction parallel to the cross section where was the maximum can be determined as MD. When the MD of the packaging materials 15 and 25 cannot be specified by the rolled grain of the metal foil, the MD can be specified by this method.

　具体的には、熱接着性樹脂層３８の長さ方向の断面と、当該長さ方向の断面と平行な方向から１０度ずつ角度を変更し、長さ方向の断面と垂直な方向までの各断面（合計１０の断面）について、それぞれ電子顕微鏡写真で観察して海島構造を確認する。次に、各断面上の個々の島について、熱接着性樹脂層３８の厚み方向に垂直な方向の両端を結ぶ直線距離によって島の径ｄを計測する。次に、各断面毎に、大きい方から上位２０個の島の径ｄの平均を算出する。そして、島の径ｄの平均が最も大きかった断面と平行な方向をＭＤと判断する。 Specifically, the cross section of the heat-adhesive resin layer 38 in the length direction and the direction perpendicular to the cross section in the length direction are changed by 10 degrees from the direction parallel to the cross section in the length direction. The cross-sections (10 cross-sections in total) are observed by electron micrographs to confirm the sea-island structure. Next, for each island on each cross section, the diameter d of the island is measured by the linear distance connecting both ends in the direction perpendicular to the thickness direction of the thermosetting resin layer 38. Next, for each cross section, the average of the diameters d of the top 20 islands from the largest is calculated. Then, the direction parallel to the cross section having the largest average diameter d of the islands is determined as MD.

　電極端子１２及び電極端子１３はＺ方向に延びてＸ方向に対向する周縁シール部２１からそれぞれ突出する。このため、蓄電デバイス１０の高さをより低くすることができる。また、電極端子１２及び電極端子１３が接近すると電極端子１２及び電極端子１３の近傍の温度上昇が大きくなるため蓄電デバイス１０が経年劣化し易い。このため、電極端子１２及び電極端子１３をＸ方向に離れて配置することにより、蓄電デバイス１０の経年劣化を抑制することができる。 The electrode terminal 12 and the electrode terminal 13 extend in the Z direction and project from the peripheral seal portion 21 facing the X direction, respectively. Therefore, the height of the power storage device 10 can be made lower. Further, when the electrode terminal 12 and the electrode terminal 13 come close to each other, the temperature rise in the vicinity of the electrode terminal 12 and the electrode terminal 13 becomes large, so that the power storage device 10 tends to deteriorate over time. Therefore, by arranging the electrode terminals 12 and the electrode terminals 13 apart from each other in the X direction, it is possible to suppress the aged deterioration of the power storage device 10.

　蓄電デバイス１０は、成形加工された外装部材２０を準備する工程後、蓄電素子１１を外装部材２０により包装する包装工程を行って製造される。また、必要に応じて包装工程後に折曲工程が設けられる。 The power storage device 10 is manufactured by performing a packaging step of packaging the power storage element 11 with the exterior member 20 after the step of preparing the molded exterior member 20. Further, if necessary, a bending process is provided after the packaging process.

　外装部材２０を成形加工する成形工程はロール状の積層体を所定長さで裁断し、冷間成形によりフランジ部１７に対して収納部１６を凹設して包装材１５を形成する。この時、包装材１５、２５はロール状の積層体の流れ方向（ＭＤ）をＺ方向に配して形成される。成形工程により外装部材２０を準備してもよく、成形加工された外装部材２０を入手して外装部材２０を準備してもよい。 In the molding process of molding the exterior member 20, the roll-shaped laminate is cut to a predetermined length, and the storage portion 16 is recessed with respect to the flange portion 17 by cold molding to form the packaging material 15. At this time, the packaging materials 15 and 25 are formed by arranging the flow direction (MD) of the roll-shaped laminate in the Z direction. The exterior member 20 may be prepared by the molding step, or the molded exterior member 20 may be obtained and the exterior member 20 may be prepared.

　図１７は包装工程を示すフローチャートである。包装工程は所定の製造装置によって行われる。ステップ＃１１では製造装置は外装部材２０内に各部品を配置する。例えば、タブフィルム１２ａ、１３ａ付きの電極端子１２、１３が溶接によって電気的に接続された蓄電素子１１が包装材１５内の収納部１６に配置される。この時、包装材１５のフランジ部１７の上にタブフィルム１２ａ、１３ａ付き電極端子１２、１３が載置される。尚、包装材１５の収納部１６に蓄電素子１１を配置した後にタブフィルム１２ａ、１３ａ付き電極端子１２、１３を蓄電素子１１に溶接してもよい。 FIG. 17 is a flowchart showing the packaging process. The packaging process is carried out by a predetermined manufacturing apparatus. In step # 11, the manufacturing apparatus arranges each component in the exterior member 20. For example, the power storage element 11 to which the electrode terminals 12 and 13 with the tab films 12a and 13a are electrically connected by welding is arranged in the storage portion 16 in the packaging material 15. At this time, the electrode terminals 12 and 13 with the tab films 12a and 13a are placed on the flange portion 17 of the packaging material 15. After arranging the power storage element 11 in the storage portion 16 of the packaging material 15, the electrode terminals 12 and 13 with the tab films 12a and 13a may be welded to the power storage element 11.

　次に、包装材１５のフランジ部１７上に弁装置５０の取付部６２が載置される。次に、包装材１５上に包装材２５が載置される。 Next, the mounting portion 62 of the valve device 50 is placed on the flange portion 17 of the packaging material 15. Next, the packaging material 25 is placed on the packaging material 15.

　図１８は包装材１５のフランジ部１７と包装材２５との間に弁装置５０を配する動作を示す図である。同図に示されるように、弁機能部５２と取付部６２との間には段差５１ｃが形成されている。このため、取付部６２を包装材１５、２５で挟む時に弁装置５０を外装部材２０側に押し込み過ぎたとしても、段差５１ｃが包装材１５、２５の端部に引っ掛かる。 FIG. 18 is a diagram showing an operation of arranging the valve device 50 between the flange portion 17 of the packaging material 15 and the packaging material 25. As shown in the figure, a step 51c is formed between the valve function portion 52 and the mounting portion 62. Therefore, even if the valve device 50 is pushed too far toward the exterior member 20 when the mounting portion 62 is sandwiched between the packaging materials 15 and 25, the step 51c is caught by the ends of the packaging materials 15 and 25.

　従って、蓄電デバイス１０の製造過程において、弁機能部５２が誤って包装材１５、２５（熱接着性樹脂層３８）に挟まれることを防止できる。即ち、取付部６２から少なくともＹ方向に立ち上がる段差５１ｃは、弁機能部５２が包装材１５、２５の間に入り込まないようにするためのストッパーとして機能する。 Therefore, it is possible to prevent the valve function portion 52 from being accidentally sandwiched between the packaging materials 15 and 25 (thermosetting resin layer 38) in the manufacturing process of the power storage device 10. That is, the step 51c rising from the mounting portion 62 in at least the Y direction functions as a stopper for preventing the valve function portion 52 from entering between the packaging materials 15 and 25.

　各部品の配置が完了すると、ステップ＃１２でヒートシール工程が行われる。ヒートシール工程は、外装部材２０の周縁を熱接着する。即ち、製造装置はヒートシールバーにより外装部材２０の周縁を挟み、外装部材２０の周縁に圧力及び熱を加える。これにより、外装部材２０の周縁において、対向する熱接着性樹脂層３８が互いに融着し、周縁シール部２１が形成される。この時、弁装置５０が周縁シール部２１に融着して固定され、電極端子１２、１３もタブフィルム１２ａ、１３ａを介して周縁シール部２１に融着して固定される。これにより、蓄電素子１１が外装部材２０内に密封される。 When the placement of each part is completed, the heat sealing process is performed in step # 12. In the heat sealing step, the peripheral edge of the exterior member 20 is heat-bonded. That is, the manufacturing apparatus sandwiches the peripheral edge of the exterior member 20 with a heat seal bar, and applies pressure and heat to the peripheral edge of the exterior member 20. As a result, the thermosetting resin layers 38 facing each other are fused to each other on the peripheral edge of the exterior member 20, and the peripheral edge sealing portion 21 is formed. At this time, the valve device 50 is fused and fixed to the peripheral edge sealing portion 21, and the electrode terminals 12 and 13 are also fused and fixed to the peripheral edge sealing portion 21 via the tab films 12a and 13a. As a result, the power storage element 11 is sealed inside the exterior member 20.

　尚、ヒートシール工程では、外装部材２０の内部の脱気を行うことで、外装部材２０の内部に不要なガスが含まれないようにすることができる。具体的には、全周を接合せずに一部に未接合状態の周縁を残しておき、この未接合状態の周縁から脱気する。この時、蓄電デバイス１０が電解液を必要とする場合には、この未接合状態の周縁から電解液を注入する。その後、未接合状態の周縁に圧力及び熱を加えて、全周の周縁シール部２１を完成させることができる。 In the heat sealing process, the inside of the exterior member 20 is degassed so that unnecessary gas is not contained inside the exterior member 20. Specifically, the entire circumference is not joined, but a part of the peripheral edge in the unjoined state is left, and the peripheral edge in the unjoined state is degassed. At this time, if the power storage device 10 requires an electrolytic solution, the electrolytic solution is injected from the peripheral edge of the unbonded state. After that, pressure and heat can be applied to the peripheral edge in the unbonded state to complete the peripheral edge sealing portion 21 on the entire circumference.

　また、製造装置のヒートシールバーのうち、外装部材２０の周縁を挟む面の形状を取付部６２の外形に沿う形状とすることも有効である。この場合には、取付部６２が挟まれた位置における熱接着性樹脂層３８同士の接着がより強固になる。この場合、包装材１５、２５の変形や負荷を低減するために、後述するように取付部６２の形状を扁平形状とすることが有効である。 It is also effective to make the shape of the surface of the heat seal bar of the manufacturing apparatus that sandwiches the peripheral edge of the exterior member 20 along the outer shape of the mounting portion 62. In this case, the adhesion between the thermosetting resin layers 38 at the position where the mounting portion 62 is sandwiched becomes stronger. In this case, in order to reduce the deformation and load of the packaging materials 15 and 25, it is effective to make the shape of the mounting portion 62 flat as described later.

　尚、各図面では、外装部材２０の収納部１６に蓄電素子１１が収容されていることを理解し易く説明するため、便宜的に収納部１６に対して蓄電素子１１を小さいサイズで示している。しかし、製造工程において以上のとおり脱気する場合には、収納部１６内の空間は縮小して蓄電素子１１と略同じサイズとなる。このため、蓄電デバイス１０の完成状態では、収納部１６ほとんど隙間なく蓄電素子１１により埋められている。 In each drawing, the power storage element 11 is shown in a smaller size than the storage part 16 for convenience in order to explain that the power storage element 11 is housed in the storage part 16 of the exterior member 20 in an easy-to-understand manner. .. However, when degassing as described above in the manufacturing process, the space inside the storage portion 16 is reduced to have substantially the same size as the power storage element 11. Therefore, in the completed state of the power storage device 10, the storage unit 16 is filled with the power storage element 11 with almost no gap.

　折曲工程は積層体の流れ方向に垂直なＸ方向に延びた下方の周縁シール部２１を折曲して収納部１６の周壁上に重ねる。これにより、蓄電デバイス１０が完成する。 In the folding step, the lower peripheral edge seal portion 21 extending in the X direction perpendicular to the flow direction of the laminated body is bent and overlapped on the peripheral wall of the storage portion 16. As a result, the power storage device 10 is completed.

　前述の図３において、蓄電デバイスパック５は複数の蓄電デバイス１０をＹ方向に並設して形成され、高さ方向に１段で電動自動車１に設置される。尚、複数の蓄電デバイスパック５をＸ方向またはＹ方向に並べて電動自動車１に設置してもよい。 In FIG. 3 described above, the power storage device pack 5 is formed by arranging a plurality of power storage devices 10 side by side in the Y direction, and is installed in the electric vehicle 1 in one stage in the height direction. A plurality of power storage device packs 5 may be arranged in the X direction or the Y direction and installed in the electric vehicle 1.

　蓄電デバイスパック５のＺ方向の長さＢｚは蓄電デバイス１０の収納部１６のＺ方向の長さＡｚと略同じ長さに形成される。蓄電デバイスパック５のＸ方向の長さＢｘは蓄電デバイス１０のＸ方向の長さと略同じ長さに形成される。また、蓄電デバイス１０をＹ方向に並設するため、蓄電デバイスパック５のＹ方向の長さＢｙはＺ方向の長さＢｚよりも大きくなっている。 The length Bz in the Z direction of the power storage device pack 5 is formed to be substantially the same length as the length AZ in the Z direction of the storage portion 16 of the power storage device 10. The length Bx of the power storage device pack 5 in the X direction is formed to have substantially the same length as the length of the power storage device 10 in the X direction. Further, since the power storage devices 10 are arranged side by side in the Y direction, the length By of the power storage device pack 5 in the Y direction is larger than the length Bz in the Z direction.

　電動自動車１がセダンタイプまたはコンパクトカータイプの場合には、蓄電デバイスパック５の高さ（Ｚ方向の長さＢｚ）は例えば１００ｍｍ以下に形成される。電動自動車１がＳＵＶタイプまたはワンボックスタイプの場合には、蓄電デバイスパック５の高さ（Ｚ方向の長さＢｚ）は例えば１５０ｍｍ以下に形成される。 When the electric vehicle 1 is a sedan type or a compact car type, the height of the power storage device pack 5 (length Bz in the Z direction) is formed to be, for example, 100 mm or less. When the electric vehicle 1 is an SUV type or a one-box type, the height of the power storage device pack 5 (length Bz in the Z direction) is formed to be, for example, 150 mm or less.

　本実施形態によると、蓄電デバイス１０は外装部材２０の収納部１６の深さ方向（Ｙ方向）が電動自動車１の前後方向に配置される。また、収納部１６の深さ方向に直交するＸ方向（第１方向）が電動自動車１の左右方向に配置される。収納部１６の深さ方向及びＸ方向に直交するＺ方向（第２方向）が電動自動車１の高さ方向に配置される。即ち、収納部１６の深さ方向に垂直な面内で直交するＸ方向（第１方向）及びＺ方向（第２方向）がそれぞれ電動自動車１の左右方向及び高さ方向に配置される。 According to the present embodiment, the power storage device 10 is arranged in the depth direction (Y direction) of the storage portion 16 of the exterior member 20 in the front-rear direction of the electric vehicle 1. Further, the X direction (first direction) orthogonal to the depth direction of the storage portion 16 is arranged in the left-right direction of the electric vehicle 1. The Z direction (second direction) orthogonal to the depth direction and the X direction of the storage portion 16 is arranged in the height direction of the electric vehicle 1. That is, the X direction (first direction) and the Z direction (second direction) orthogonal to each other in the plane perpendicular to the depth direction of the storage portion 16 are arranged in the left-right direction and the height direction of the electric vehicle 1, respectively.

　これにより、複数の蓄電デバイス１０を積み重ねずに電動自動車１に設置して所望の電力を供給することができる。従って、積み重ねた際の加重による外装部材２０の破損を防止することができ、蓄電デバイス１０の信頼性を向上することができる。また、蓄電デバイス１０が電解液を含む場合に、収納部１６の深さ方向（Ｙ方向）を前後方向に配置して蓄電デバイス１０のエネルギー密度の低下を防止することができる。 As a result, it is possible to install the plurality of power storage devices 10 in the electric vehicle 1 without stacking them and supply desired electric power. Therefore, it is possible to prevent the exterior member 20 from being damaged by the load when stacked, and it is possible to improve the reliability of the power storage device 10. Further, when the power storage device 10 contains an electrolytic solution, the depth direction (Y direction) of the storage unit 16 can be arranged in the front-rear direction to prevent a decrease in the energy density of the power storage device 10.

　また、外装部材２０の周縁シール部２１に弁装置５０が取り付けられるため、ガス抜きを行う圧力の正確な制御が可能となる。 Further, since the valve device 50 is attached to the peripheral seal portion 21 of the exterior member 20, it is possible to accurately control the pressure for degassing.

　また、弁装置５０は弁機構を設けた弁機能部５２（第１部分）と通気路６３を設けた取付部６２（第２部分）とを有し、弁装置５０の取付部６２（第２部分）の内端６２ａが周縁シール部２１の内側端縁Ｐ２から収納部１６に向かう方向に突出する。これにより、周縁シール部２１の熱接着時において取付部６２の内端部の変形や、溶融した包装材１５、２５による通気路６３の目詰まりを防止できる。従って、弁装置５０の故障を抑制することができる。 Further, the valve device 50 has a valve function portion 52 (first portion) provided with a valve mechanism and a mounting portion 62 (second portion) provided with a ventilation passage 63, and the valve device 50 mounting portion 62 (second portion). The inner end 62a of the portion) projects from the inner edge P2 of the peripheral edge seal portion 21 toward the storage portion 16. As a result, it is possible to prevent deformation of the inner end portion of the mounting portion 62 and clogging of the ventilation passage 63 due to the melted packaging materials 15 and 25 when the peripheral edge sealing portion 21 is thermally bonded. Therefore, the failure of the valve device 50 can be suppressed.

　また、収納部１６が周縁シール部２１の内側端縁Ｐ３よりも内側に配置され、取付部６２の内端６２ａがフランジ部１７の内側端縁Ｐ３（収納部１６の外側端縁）よりも内側に位置してもよい。これにより、弁装置５０の故障をより確実に抑制することができる。 Further, the storage portion 16 is arranged inside the inner edge P3 of the peripheral edge seal portion 21, and the inner end 62a of the mounting portion 62 is inside the inner edge P3 (outer edge of the storage portion 16) of the flange portion 17. It may be located in. As a result, the failure of the valve device 50 can be suppressed more reliably.

　また、弁機能を内部に形成した弁機能部５２（第１部分）の外形が通気路６３を内部に形成した取付部６２（第２部分）の外形から収納部１６の深さ方向（Ｙ方向）においてはみ出している。これにより、周縁シール部２１のＹ方向（収納部１６の深さ方向）の取付部６２上の長さＬ４と、取付部６２を挟まれていない部分の長さＬ３との差を小さくできる。このため、熱接着時に外装部材２０の周縁全体に加えられる圧力を小さくできる。従って、蓄電デバイス１０の絶縁破壊を防止しつつ、対向する熱接着性樹脂層３８を適切に熱接着して取付部６２を外装部材２０に強固に固定することができる。 Further, the outer shape of the valve function portion 52 (first portion) having the valve function formed inside is from the outer shape of the mounting portion 62 (second portion) having the ventilation passage 63 formed inside to the depth direction (Y direction) of the storage portion 16. ) Is sticking out. As a result, the difference between the length L4 on the mounting portion 62 in the Y direction of the peripheral edge sealing portion 21 (the depth direction of the storage portion 16) and the length L3 of the portion not sandwiching the mounting portion 62 can be reduced. Therefore, the pressure applied to the entire peripheral edge of the exterior member 20 at the time of thermal bonding can be reduced. Therefore, the mounting portion 62 can be firmly fixed to the exterior member 20 by appropriately heat-bonding the opposing thermosetting resin layers 38 while preventing dielectric breakdown of the power storage device 10.

　また、弁機能部５２（第１部分）は取付部６２（第２部分）よりも通気路６３の延びる方向に直交する断面における断面積が大きい。これにより、周縁シール部２１のＹ方向（収納部１６の深さ方向）の取付部６２上の長さＬ４と、取付部６２を挟まれていない部分の長さＬ３との差を小さくできる。このため、熱接着時に外装部材２０の周縁全体に加えられる圧力を小さくできる。従って、蓄電デバイス１０の絶縁破壊を防止しつつ、対向する熱接着性樹脂層３８を適切に熱接着して取付部６２を外装部材２０に強固に固定することができる。 Further, the valve function portion 52 (first portion) has a larger cross-sectional area than the mounting portion 62 (second portion) in the cross section orthogonal to the extending direction of the air passage 63. As a result, the difference between the length L4 on the mounting portion 62 in the Y direction of the peripheral edge sealing portion 21 (the depth direction of the storage portion 16) and the length L3 of the portion not sandwiching the mounting portion 62 can be reduced. Therefore, the pressure applied to the entire peripheral edge of the exterior member 20 at the time of thermal bonding can be reduced. Therefore, the mounting portion 62 can be firmly fixed to the exterior member 20 by appropriately heat-bonding the opposing thermosetting resin layers 38 while preventing dielectric breakdown of the power storage device 10.

　尚、弁機能部５２と取付部６２との境界に段差５１ｃを設けているが、段差５１ｃが形成されていなくてもよい。たとえば、弁機能部５２の直径と取付部６２の直径とが同一であり、弁機能部５２と取付部６２とがフラットに繋がっていてもよい。 Although a step 51c is provided at the boundary between the valve function portion 52 and the mounting portion 62, the step 51c may not be formed. For example, the diameter of the valve function portion 52 and the diameter of the mounting portion 62 may be the same, and the valve function portion 52 and the mounting portion 62 may be connected flat.

　また、取付部６２が熱接着性樹脂層３８に挟まれ、弁機能部５２上で周縁シール部２１が熱接着されないため、熱接着時に加えられる熱及び圧力による弁機構の故障を防止することができる。 Further, since the mounting portion 62 is sandwiched between the heat-adhesive resin layer 38 and the peripheral edge sealing portion 21 is not heat-bonded on the valve function portion 52, it is possible to prevent the valve mechanism from being damaged by the heat and pressure applied during the heat bonding. it can.

　この時、収納部１６の深さ方向（Ｙ方向）において、弁機能部５２の長さＬ２は取付部６２の長さＬ１よりも長く、弁機能部５２と取付部６２との境界に段差５１ｃが形成されている。これにより、蓄電デバイス１０の製造時に弁装置５０が包装材１５、２５の熱接着性樹脂層３８間に押し込まれた際に、段差５１ｃがストッパーとして機能する。従って、弁機能部５２が包装材１５、２５の間に入り込まず、弁機能部５２上の熱接着を確実に防止することができる。 At this time, in the depth direction (Y direction) of the storage portion 16, the length L2 of the valve function portion 52 is longer than the length L1 of the mounting portion 62, and the step 51c at the boundary between the valve function portion 52 and the mounting portion 62. Is formed. As a result, when the valve device 50 is pushed between the thermosetting resin layers 38 of the packaging materials 15 and 25 during the manufacture of the power storage device 10, the step 51c functions as a stopper. Therefore, the valve function portion 52 does not enter between the packaging materials 15 and 25, and thermal adhesion on the valve function portion 52 can be reliably prevented.

　また、通気路６３の断面形状が円形であるので、通気路６３を容易に形成することができる。 Further, since the cross-sectional shape of the ventilation passage 63 is circular, the ventilation passage 63 can be easily formed.

　また、取付部６２において、弁機能部５２とは反対側の端部の外周側の角が丸みを帯びている。これにより、取付部６２の内端部が蓄電素子１１に接触しても蓄電素子１１を傷つける可能性を低くすることができる。また、取付部６２の内端部との接触による包装材１５、２５の熱接着性樹脂層３８の傷を防止することができる。 Further, in the mounting portion 62, the corners on the outer peripheral side of the end portion on the side opposite to the valve function portion 52 are rounded. As a result, even if the inner end portion of the mounting portion 62 comes into contact with the power storage element 11, the possibility of damaging the power storage element 11 can be reduced. Further, it is possible to prevent the thermosetting resin layers 38 of the packaging materials 15 and 25 from being scratched due to contact with the inner end portion of the mounting portion 62.

　また、弁装置５０が収納部１６の深さ方向から見て略矩形に形成される外装部材２０の上辺に取り付けられる。このため、弁装置５０を備えた蓄電デバイス１０を車両底部に容易に設置することができる。 Further, the valve device 50 is attached to the upper side of the exterior member 20 formed in a substantially rectangular shape when viewed from the depth direction of the storage portion 16. Therefore, the power storage device 10 provided with the valve device 50 can be easily installed at the bottom of the vehicle.

　また、収納部１６の深さ方向に垂直な面内の短手方向（Ｚ方向）を高さ方向に配置するため、収納部１６のＸ方向の長さＡｘがＺ方向の長さＡｚよりも大きい。これにより、蓄電デバイス１０の高さを低くして電動自動車１の居住性を向上できるとともに、容量の大きい蓄電デバイス１０を得ることができる。 Further, since the lateral direction (Z direction) in the plane perpendicular to the depth direction of the storage portion 16 is arranged in the height direction, the length Ax in the X direction of the storage portion 16 is larger than the length Az in the Z direction. large. As a result, the height of the power storage device 10 can be lowered to improve the comfort of the electric vehicle 1, and the power storage device 10 having a large capacity can be obtained.

　また、収納部１６のＸ方向の長さＡｘがＺ方向の長さＡｚの２倍～３０倍であるので、容量の大きい蓄電デバイス１０を得られるとともに外装部材２０の歩留りを向上することができる。 Further, since the length Ax of the storage portion 16 in the X direction is 2 to 30 times the length Az in the Z direction, it is possible to obtain a power storage device 10 having a large capacity and improve the yield of the exterior member 20. ..

　また、Ｘ方向に延びる周縁シール部２１が折曲により収納部１６の周壁上に重ねられるので、蓄電デバイス１０の高さをより低くすることができる。 Further, since the peripheral seal portion 21 extending in the X direction is overlapped on the peripheral wall of the storage portion 16 by bending, the height of the power storage device 10 can be further lowered.

　また、包装材１５、２５の流れ方向がＸ方向に直交するので、Ｘ方向に延びる周縁シール部２１を折曲した際に外装部材２０のクラック及びピンホールの発生を抑制することができる。 Further, since the flow directions of the packaging materials 15 and 25 are orthogonal to the X direction, it is possible to suppress the occurrence of cracks and pinholes in the exterior member 20 when the peripheral edge seal portion 21 extending in the X direction is bent.

　また、電極端子１２及び電極端子１３がＺ方向に延びる周縁シール部２１から突出するので、蓄電デバイス１０の高さをより低くすることができる。 Further, since the electrode terminal 12 and the electrode terminal 13 project from the peripheral edge seal portion 21 extending in the Z direction, the height of the power storage device 10 can be further lowered.

　また、電極端子１２及び電極端子１３がＸ方向に対向する周縁シール部２１からそれぞれ突出するので、蓄電デバイス１０の経年劣化を抑制することができる。 Further, since the electrode terminal 12 and the electrode terminal 13 project from the peripheral seal portion 21 facing in the X direction, deterioration of the power storage device 10 over time can be suppressed.

　また、蓄電デバイスパック５（蓄電デバイス集合体）が蓄電デバイス１０を収納部１６の深さ方向（Ｙ方向）に並設して形成され、蓄電デバイスパック５のＹ方向の長さＢｙがＺ方向の長さＢｚよりも大きい。これにより、蓄電デバイスパック５の高さを低くして所望の電力を供給することができる。 Further, the power storage device pack 5 (collection of power storage devices) is formed by arranging the power storage devices 10 in parallel in the depth direction (Y direction) of the storage unit 16, and the length By of the power storage device pack 5 in the Y direction is the Z direction. Is greater than the length Bz of. As a result, the height of the power storage device pack 5 can be lowered to supply desired power.

　また、電動自動車１の高さ方向に蓄電デバイスパック５が１段で設置されるため、電動自動車１の居住性を向上することができる。 Further, since the power storage device pack 5 is installed in one stage in the height direction of the electric vehicle 1, the comfortability of the electric vehicle 1 can be improved.

　本実施形態において、弁機能部５２及び取付部６２は同一の材料（樹脂）の筐体５１を有しているが、弁機能部５２の筐体と取付部６２の筐体とが異なる材料で構成されてもよい。この時、取付部６２は、包装材１５、２５の最内層と同じ熱接着性を備えた材料（例えばポリオレフィン等の樹脂）から構成することができる。取付部６２が高耐熱性を必要な場合等に熱接着性樹脂以外の材料を使用される場合は、上記タブフィルム１２ａ、１３ａ（図５参照）と同様の接着性保護フィルムを介在して熱接着する方法が有効である。 In the present embodiment, the valve function portion 52 and the mounting portion 62 have a housing 51 made of the same material (resin), but the housing of the valve function portion 52 and the housing of the mounting portion 62 are made of different materials. It may be configured. At this time, the mounting portion 62 can be made of a material (for example, a resin such as polyolefin) having the same thermal adhesiveness as the innermost layers of the packaging materials 15 and 25. When a material other than the thermosetting resin is used when the mounting portion 62 requires high heat resistance, heat is interposed via an adhesive protective film similar to the tab films 12a and 13a (see FIG. 5). The method of bonding is effective.

　また、弁機能部５２の筐体の材質の融点を取付部６２の材質の融点よりも高くするとよい。例えば、取付部６２がポリプロピレン（ＰＰ）で構成され、弁機能部５２の筐体がＰＰより融点が高い樹脂（たとえば、フッ素系樹脂、ポリエステル系樹脂、ポリイミド系樹脂、ポリカーボネート系樹脂、アクリル樹脂）や金属で構成されてもよい。弁機能部５２の筐体に用いる樹脂として、バリア性の高いフッ素樹脂が好ましい。 Further, it is preferable that the melting point of the material of the housing of the valve function portion 52 is higher than the melting point of the material of the material of the mounting portion 62. For example, the mounting portion 62 is made of polypropylene (PP), and the housing of the valve function portion 52 has a resin having a higher melting point than PP (for example, fluororesin, polyester resin, polyimide resin, polycarbonate resin, acrylic resin). Or metal. As the resin used for the housing of the valve function portion 52, a fluororesin having a high barrier property is preferable.

　これにより、熱接着性樹脂層３８の熱接着時に取付部６２に圧力及び熱が加えられたとしても、弁機能部５２の筐体の融点が高いため、弁機能部が熱によって変形する可能性が低い。従って、熱接着性樹脂層３８の熱接着時における弁機能部５２内の弁機構の故障を抑制することができる。 As a result, even if pressure and heat are applied to the mounting portion 62 during thermal bonding of the thermosetting resin layer 38, the valve functional portion may be deformed by heat because the melting point of the housing of the valve functional portion 52 is high. Is low. Therefore, it is possible to suppress a failure of the valve mechanism in the valve function portion 52 during thermal bonding of the thermosetting resin layer 38.

　また、弁装置５０の筐体５１は必ずしも樹脂製である必要はなく、例えば、金属（アルミニウム、アルミニウム合金、ステンレス、鋼、チタン等）製であってもよい。この場合には、取付部６２と熱接着性樹脂層３８との間にタブフィルム１２ａ、１３ａと同様の接着性保護フィルムが配置されてもよい。この接着性保護フィルムは、一方の面が少なくとも樹脂に接着して他方の面が少なくとも金属に接着するように構成され、公知の種々の接着性保護フィルムを採用することができる。 Further, the housing 51 of the valve device 50 does not necessarily have to be made of resin, and may be made of metal (aluminum, aluminum alloy, stainless steel, steel, titanium, etc.), for example. In this case, an adhesive protective film similar to the tab films 12a and 13a may be arranged between the mounting portion 62 and the thermosetting resin layer 38. This adhesive protective film is configured such that one surface adheres to at least a resin and the other surface adheres to at least a metal, and various known adhesive protective films can be adopted.

　＜第２実施形態＞
　次に、図１９、図２０は第２実施形態の蓄電デバイス１０の分解斜視図及び側面断面図を示している。説明の便宜上、前述の図１～図１８に示す第１実施形態と同様の部分には同一の符号を付している。本実施形態は包装材２５の形状が第１実施形態と異なっており、その他の部分は第１実施形態と同様である。 <Second Embodiment>
Next, FIGS. 19 and 20 show an exploded perspective view and a side sectional view of the power storage device 10 of the second embodiment. For convenience of explanation, the same parts as those in the first embodiment shown in FIGS. 1 to 18 are designated by the same reference numerals. In this embodiment, the shape of the packaging material 25 is different from that of the first embodiment, and other parts are the same as those of the first embodiment.

　包装材２５は包装材１５と同様に収納部２６及びフランジ部２７を有している。収納部２６は一面に略矩形の開口部２６ａを開口する。包装材１５の収納部１６及び包装材２５の収納部２６に蓄電素子１１が収納される。フランジ部２７は開口部２６ａの周縁から外周側に突出した環状に形成される。 The packaging material 25 has a storage portion 26 and a flange portion 27 like the packaging material 15. The storage portion 26 opens a substantially rectangular opening 26a on one surface. The power storage element 11 is stored in the storage portion 16 of the packaging material 15 and the storage portion 26 of the packaging material 25. The flange portion 27 is formed in an annular shape protruding outward from the peripheral edge of the opening 26a.

　フランジ部１７及びフランジ部２７の熱接着性樹脂層３８（図７参照）を熱接着することにより、収納部１６及び収納部２６の周囲に沿う環状の周縁シール部２１が形成される。これにより、周縁シール部２１の内縁から所定の深さに形成される収納部１６及び収納部２６が周縁シール部２１によって封止される。 By heat-bonding the thermosetting resin layer 38 (see FIG. 7) of the flange portion 17 and the flange portion 27, an annular peripheral edge seal portion 21 along the periphery of the storage portion 16 and the storage portion 26 is formed. As a result, the storage portion 16 and the storage portion 26 formed at a predetermined depth from the inner edge of the peripheral edge seal portion 21 are sealed by the peripheral edge seal portion 21.

　また、Ｘ方向に延びる周縁シール部２１は熱接着時に一点鎖線２１’で示すようにＺ方向に突出し、熱接着後に折曲して収納部１６または収納部２６の周壁上に重ねられる。 Further, the peripheral seal portion 21 extending in the X direction protrudes in the Z direction as shown by the alternate long and short dash line 21'during thermal bonding, is bent after thermal bonding, and is overlapped on the peripheral wall of the storage portion 16 or the storage portion 26.

　蓄電デバイス１０は収納部１６、２６の深さ方向（Ｙ方向）を電動自動車１の前後方向に配置される。また、収納部１６、２６の深さ方向に垂直な面内の長手方向（Ｘ方向）を電動自動車１の左右方向に配置され、短手方向（Ｚ方向）を電動自動車１の高さ方向に配置される。 The power storage device 10 is arranged in the depth direction (Y direction) of the storage portions 16 and 26 in the front-rear direction of the electric vehicle 1. Further, the longitudinal direction (X direction) in the plane perpendicular to the depth direction of the storage portions 16 and 26 is arranged in the left-right direction of the electric vehicle 1, and the lateral direction (Z direction) is in the height direction of the electric vehicle 1. Be placed.

　これにより、第１実施形態と同様の効果を得ることができる。また、包装材１５及び包装材２５がそれぞれ収納部１６及び収納部２６を備えるので、蓄電素子１１の体積を大きくして蓄電デバイス１０の容量を大きくすることができる。従って、蓄電デバイスパック５（図３参照）を形成する蓄電デバイス１０の数量を削減し、蓄電デバイスパック５の製造工数を削減することができる。 Thereby, the same effect as that of the first embodiment can be obtained. Further, since the packaging material 15 and the packaging material 25 are provided with the storage unit 16 and the storage unit 26, respectively, the volume of the power storage element 11 can be increased to increase the capacity of the power storage device 10. Therefore, it is possible to reduce the number of power storage devices 10 forming the power storage device pack 5 (see FIG. 3) and reduce the man-hours for manufacturing the power storage device pack 5.

　図２１に示すように、蓄電デバイス１０は保護カバー８、９により覆われていてもよい。保護カバー８、９は射出成形により一面に開口を有した断面矩形の有底筒状に形成される。また、保護カバー９の外形が保護カバー８の開口よりも小さく形成される。 As shown in FIG. 21, the power storage device 10 may be covered with the protective covers 8 and 9. The protective covers 8 and 9 are formed by injection molding into a bottomed tubular shape having an opening on one side and having a rectangular cross section. Further, the outer shape of the protective cover 9 is formed smaller than the opening of the protective cover 8.

　外装部材２０の周部に突出する下端の周縁シール部２１は保護カバー９の周壁に沿って折曲され、保護カバー８が周縁シール部２１に沿って保護カバー９に被嵌される。この時、保護カバー８と弁装置５０との干渉を回避するために、保護カバー８には切り欠き８ａが形成される。下方の周縁シール部２１は収納部１６、２６の開口部１６ａ、２６ａ（図７参照）の周縁から離れた位置で折曲される。このため、周縁シール部２１の折曲によるクラックやピンホールの発生を低減することができる。 The peripheral edge seal portion 21 at the lower end protruding from the peripheral portion of the exterior member 20 is bent along the peripheral wall of the protective cover 9, and the protective cover 8 is fitted to the protective cover 9 along the peripheral edge seal portion 21. At this time, a notch 8a is formed in the protective cover 8 in order to avoid interference between the protective cover 8 and the valve device 50. The lower peripheral edge seal portion 21 is bent at a position away from the peripheral edge of the openings 16a and 26a (see FIG. 7) of the storage portions 16 and 26. Therefore, it is possible to reduce the occurrence of cracks and pinholes due to bending of the peripheral seal portion 21.

　図２２は、図２１と異なる形状の保護カバー８、９により覆われた蓄電デバイス１０を示している。保護カバー８、９は射出成形により略同一形状に形成され、一面に開口を有した有底筒状に形成される。蓄電デバイス１０は折曲工程を省かれ、外装部材２０の周部に突出した周縁シール部２１を保護カバー８、９の周壁により挟んだ状態で保護カバー８、９が固定される。これにより、周縁シール部２１が保護される。折曲工程が省かれるため、周縁シール部２１の折曲によるクラックやピンホールの発生を低減することができる。 FIG. 22 shows the power storage device 10 covered with protective covers 8 and 9 having a shape different from that of FIG. 21. The protective covers 8 and 9 are formed into substantially the same shape by injection molding, and are formed in a bottomed tubular shape having an opening on one surface. The power storage device 10 omits the bending step, and the protective covers 8 and 9 are fixed in a state where the peripheral seal portion 21 protruding from the peripheral portion of the exterior member 20 is sandwiched between the peripheral walls of the protective covers 8 and 9. As a result, the peripheral seal portion 21 is protected. Since the bending step is omitted, it is possible to reduce the occurrence of cracks and pinholes due to bending of the peripheral seal portion 21.

　尚、第１実施形態の蓄電デバイス１０についても同様の保護カバー８、９により外装部材２０を覆ってもよい。 The exterior member 20 may be covered with the same protective covers 8 and 9 for the power storage device 10 of the first embodiment.

　＜第３実施形態＞
　次に、図２３は第３実施形態の蓄電デバイス１０の分解斜視図を示している。説明の便宜上、前述の図１９、図２０に示す第２実施形態と同様の部分には同一の符号を付している。本実施形態は包装材１５及び包装材２５が単一部材により形成される。その他の部分は第２実施形態と同様である。 <Third Embodiment>
Next, FIG. 23 shows an exploded perspective view of the power storage device 10 of the third embodiment. For convenience of explanation, the same parts as those in the second embodiment shown in FIGS. 19 and 20 are designated by the same reference numerals. In this embodiment, the packaging material 15 and the packaging material 25 are formed of a single member. Other parts are the same as those in the second embodiment.

　外装部材２０は収納部１６を有する包装材１５（第１包装材）と、収納部２６を有する包装材２５（第２包装材）とがＺ方向に連続して一体に形成される。包装材１５のフランジ部１７と包装材２５のフランジ部２７とは折り線２０ａを介して面一に形成される。 In the exterior member 20, the packaging material 15 (first packaging material) having the storage portion 16 and the packaging material 25 (second packaging material) having the storage portion 26 are integrally formed continuously in the Z direction. The flange portion 17 of the packaging material 15 and the flange portion 27 of the packaging material 25 are formed flush with each other via the folding line 20a.

　収納部１６または収納部２６内に蓄電素子１１を配した後、外装部材２０はＸ方向に延びる折り線２０ａ上で折曲される。そして、対向するフランジ部１７、２７を熱接着して周縁シール部２１が形成される。 After arranging the power storage element 11 in the storage portion 16 or the storage portion 26, the exterior member 20 is bent on the folding line 20a extending in the X direction. Then, the flange portions 17 and 27 facing each other are heat-bonded to form the peripheral edge sealing portion 21.

　本実施形態によると、第２実施形態と同様の効果を得ることができる。また、包装材１５及び包装材２５が単一部材により形成されるので、蓄電デバイス１０の部品点数を削減することができる。 According to this embodiment, the same effect as that of the second embodiment can be obtained. Further, since the packaging material 15 and the packaging material 25 are formed of a single member, the number of parts of the power storage device 10 can be reduced.

　本実施形態において、開口部１６ａ、２６ａを近接し、折り線２０ａを開口部１６ａ、２６ａの周縁に沿って設けてもよい。これにより、蓄電デバイス１０の下面を平坦に形成することができる。このため、蓄電デバイス１０が設置される設置面と蓄電デバイス１０との密着性が高くなり、蓄電デバイス１０の放熱性を向上することができる。 In the present embodiment, the openings 16a and 26a may be close to each other, and the folding line 20a may be provided along the peripheral edge of the openings 16a and 26a. As a result, the lower surface of the power storage device 10 can be formed flat. Therefore, the adhesion between the installation surface on which the power storage device 10 is installed and the power storage device 10 is improved, and the heat dissipation of the power storage device 10 can be improved.

　尚、第１、第２実施形態の包装材１５と包装材２５とを下端の折り線を介して連設される単一部材により形成してもよい。 Note that the packaging material 15 and the packaging material 25 of the first and second embodiments may be formed of a single member which is continuously provided via a folding line at the lower end.

　＜第４実施形態＞
　次に、図２４は第４実施形態の電動自動車１の上面図を示している。説明の便宜上、前述の図１～図１８に示す第１実施形態と同様の部分には同一の符号を付している。本実施形態は第１実施形態に対して蓄電デバイスパック５の配置が異なっている。その他の部分は第１実施形態と同様である。 <Fourth Embodiment>
Next, FIG. 24 shows a top view of the electric vehicle 1 of the fourth embodiment. For convenience of explanation, the same parts as those in the first embodiment shown in FIGS. 1 to 18 are designated by the same reference numerals. In this embodiment, the arrangement of the power storage device pack 5 is different from that in the first embodiment. Other parts are the same as those in the first embodiment.

　蓄電デバイスパック５は電動自動車１の車体のフロア下に設置され、蓄電デバイス１０の並設方向を電動自動車１の左右方向に配置される。これにより、蓄電デバイス１０は収納部１６（図４参照）の深さ方向（Ｙ方向）を電動自動車１の左右方向に配置される。また、収納部１６の深さ方向に垂直な面内の長手方向（Ｘ方向、第１方向）を電動自動車１の左右方向に配置され、短手方向（Ｚ方向、第２方向）を電動自動車１の高さ方向に配置される。即ち、収納部１６の深さ方向に直交するＸ方向を電動自動車１の前後方向に配置され、収納部１６の深さ方向及びＸ方向に直交するＺ方向を電動自動車１の高さ方向に配置される。 The power storage device pack 5 is installed under the floor of the vehicle body of the electric vehicle 1, and the power storage device 10 is arranged side by side in the left-right direction of the electric vehicle 1. As a result, the power storage device 10 is arranged in the depth direction (Y direction) of the storage portion 16 (see FIG. 4) in the left-right direction of the electric vehicle 1. Further, the longitudinal direction (X direction, first direction) in the plane perpendicular to the depth direction of the storage portion 16 is arranged in the left-right direction of the electric vehicle 1, and the lateral direction (Z direction, second direction) is the electric vehicle. It is arranged in the height direction of 1. That is, the X direction orthogonal to the depth direction of the storage portion 16 is arranged in the front-rear direction of the electric vehicle 1, and the depth direction of the storage portion 16 and the Z direction orthogonal to the X direction are arranged in the height direction of the electric vehicle 1. Will be done.

　これにより、複数の蓄電デバイス１０を積み重ねずに電動自動車１に設置して所望の電力を供給することができる。従って、第１実施形態と同様の効果を得ることができる。また、電動自動車１の走行時に前面のフロントグリルを介して内部に取り込まれた空気が後方に流通し、蓄電デバイスパック５の各蓄電デバイス１０に接触する。このため、蓄電デバイス１０を冷却することができる。 As a result, it is possible to install the plurality of power storage devices 10 in the electric vehicle 1 without stacking them and supply desired electric power. Therefore, the same effect as that of the first embodiment can be obtained. Further, when the electric vehicle 1 is traveling, the air taken in inside through the front grill on the front circulates to the rear and comes into contact with each of the power storage devices 10 of the power storage device pack 5. Therefore, the power storage device 10 can be cooled.

　尚、第２実施形態または第３実施形態の蓄電デバイス１０を電動自動車１に設置し、蓄電デバイス１０の並設方向を電動自動車１の左右方向に配置してもよい。 The power storage device 10 of the second embodiment or the third embodiment may be installed in the electric vehicle 1 and the power storage device 10 may be arranged side by side in the left-right direction of the electric vehicle 1.

　＜第５実施形態＞
　次に、図２５は第５実施形態の電動自動車１の蓄電デバイス１０の弁装置５０の横断面図を示している。説明の便宜上、前述の図１～図１８に示す第１実施形態と同様の部分には同一の符号を付している。本実施形態は第１実施形態に対して弁装置５０の取付部６２の形状が異なっている。その他の部分は第１実施形態と同様である。 <Fifth Embodiment>
Next, FIG. 25 shows a cross-sectional view of the valve device 50 of the power storage device 10 of the electric vehicle 1 of the fifth embodiment. For convenience of explanation, the same parts as those in the first embodiment shown in FIGS. 1 to 18 are designated by the same reference numerals. In this embodiment, the shape of the mounting portion 62 of the valve device 50 is different from that in the first embodiment. Other parts are the same as those in the first embodiment.

　図２５に示すように、取付部６２の断面において、Ｘ方向（図４参照）の長さＬ５は、Ｙ方向（図６参照）の長さＬ６よりも長い。より具体的には、取付部６２の断面形状は、楕円形状である。 As shown in FIG. 25, in the cross section of the mounting portion 62, the length L5 in the X direction (see FIG. 4) is longer than the length L6 in the Y direction (see FIG. 6). More specifically, the cross-sectional shape of the mounting portion 62 is an elliptical shape.

　取付部６２の内部には通気路６３が形成されている。通気路６３も同様に、Ｘ方向の長さはＹ方向の長さよりも長い。より具体的には、通気路６３の断面形状は楕円形状である。 A ventilation path 63 is formed inside the mounting portion 62. Similarly, the length of the air passage 63 in the X direction is longer than the length in the Y direction. More specifically, the cross-sectional shape of the air passage 63 is elliptical.

　本実施形態によると、取付部６２のＸ方向の長さＬ５がＹ方向（収納部１６の深さ方向）の長さＬ６よりも長い。即ち、取付部６２の断面形状が第１実施形態の円（面積は同一）である場合と比較して、Ｙ方向における取付部６２の長さが短い。これにより、周縁シール部２１のＹ方向の取付部６２上の厚み（長さＬ４、図１４参照）と、取付部６２を挟まれていない部分の厚み（長さＬ３、図１４参照）との差をより小さくできる。従って、弁装置５０の取付部６２を外装部材２０により強固に固定することができる。 According to this embodiment, the length L5 of the mounting portion 62 in the X direction is longer than the length L6 in the Y direction (the depth direction of the storage portion 16). That is, the length of the mounting portion 62 in the Y direction is shorter than that in the case where the cross-sectional shape of the mounting portion 62 is a circle (same area) in the first embodiment. As a result, the thickness of the peripheral seal portion 21 on the mounting portion 62 in the Y direction (length L4, see FIG. 14) and the thickness of the portion where the mounting portion 62 is not sandwiched (length L3, see FIG. 14). The difference can be made smaller. Therefore, the mounting portion 62 of the valve device 50 can be firmly fixed by the exterior member 20.

　尚、本実施形態の弁装置５０を第２～第４実施形態の電動自動車１の蓄電デバイス１０に設けてもよい。 The valve device 50 of the present embodiment may be provided in the power storage device 10 of the electric vehicle 1 of the second to fourth embodiments.

　＜第６実施形態＞
　次に、図２６は第６実施形態の電動自動車１の蓄電デバイス１０の弁装置５０の横断面図を示している。説明の便宜上、前述の図１～図１８に示す第１実施形態と同様の部分には同一の符号を付している。本実施形態は第１実施形態に対して弁装置５０の取付部６２の形状が異なっている。その他の部分は第１実施形態と同様である。 <Sixth Embodiment>
Next, FIG. 26 shows a cross-sectional view of the valve device 50 of the power storage device 10 of the electric vehicle 1 of the sixth embodiment. For convenience of explanation, the same parts as those in the first embodiment shown in FIGS. 1 to 18 are designated by the same reference numerals. In this embodiment, the shape of the mounting portion 62 of the valve device 50 is different from that in the first embodiment. Other parts are the same as those in the first embodiment.

　図２６に示すように、取付部６２にはＸ方向の両端部に翼状延端部６４が形成されている。各翼状延端部６４はＸ方向の端部に近づくほど薄くなる形状を有している。また、別の観点からは、各翼状延端部６４は取付部６２の他の部分（円形部分）と比較して、Ｙ方向（収納部１６の深さ方向）の長さの変化が緩やかな部分ともいえる。 As shown in FIG. 26, the mounting portion 62 is formed with wing-shaped extension portions 64 at both ends in the X direction. Each wing-shaped extending end portion 64 has a shape that becomes thinner as it approaches the end portion in the X direction. From another point of view, the length of each wing-shaped extension portion 64 changes more slowly in the Y direction (depth direction of the storage portion 16) than the other portion (circular portion) of the mounting portion 62. It can be said to be a part.

　本実施形態によると、翼状延端部６４が設けられていない場合と比較して、周縁シール部２１の取付部６２が挟まれていない部分から挟まれている部分への厚み（Ｙ方向の長さ）の変化が滑らかである。このため、熱接着時に取付部６２の周面に容易に熱接着性樹脂層３８を密着させることができ、外装部材２０に取付部６２をより強固に固定することができる。 According to the present embodiment, as compared with the case where the wing-shaped extension portion 64 is not provided, the thickness (length in the Y direction) from the portion where the attachment portion 62 of the peripheral edge seal portion 21 is not sandwiched to the portion sandwiched. The change is smooth. Therefore, the thermosetting resin layer 38 can be easily brought into close contact with the peripheral surface of the mounting portion 62 at the time of heat bonding, and the mounting portion 62 can be more firmly fixed to the exterior member 20.

　尚、本実施形態の弁装置５０を第２～第４実施形態の電動自動車１の蓄電デバイス１０に設けてもよい。 The valve device 50 of the present embodiment may be provided in the power storage device 10 of the electric vehicle 1 of the second to fourth embodiments.

　＜第７実施形態＞
　次に、図２７、図２８は第７実施形態の電動自動車１の蓄電デバイス１０の弁装置５０の正面図及び横断面図を示している。説明の便宜上、前述の図１～図１８に示す第１実施形態と同様の部分には同一の符号を付している。本実施形態は第１実施形態に対して弁装置５０の取付部６２の形状が異なっている。その他の部分は第１実施形態と同様である。 <7th Embodiment>
Next, FIGS. 27 and 28 show a front view and a cross-sectional view of the valve device 50 of the power storage device 10 of the electric vehicle 1 of the seventh embodiment. For convenience of explanation, the same parts as those in the first embodiment shown in FIGS. 1 to 18 are designated by the same reference numerals. In this embodiment, the shape of the mounting portion 62 of the valve device 50 is different from that in the first embodiment. Other parts are the same as those in the first embodiment.

　取付部６２の通気路６３内には、２本のピラー６５が形成されている。各ピラー６５はＺ方向に延びてＸ方向に並設され、Ｙ方向の両端を取付部６２の内周に接続されている。尚、ピラー６５の数は２本である必要はなく、少なくとも１本あればよい。 Two pillars 65 are formed in the ventilation passage 63 of the mounting portion 62. Each pillar 65 extends in the Z direction and is arranged side by side in the X direction, and both ends in the Y direction are connected to the inner circumference of the mounting portion 62. The number of pillars 65 does not have to be two, but at least one.

　本実施形態によると、通気路６３内にピラー６５が形成されているため、対向する熱接着性樹脂層３８に挟まれた取付部６２に圧力及び熱が加えられたとしても、通気路６３の形状が維持される。従って、熱接着時の取付部６２内の通気路６３の破損を抑制することができる。 According to the present embodiment, since the pillar 65 is formed in the ventilation passage 63, even if pressure and heat are applied to the mounting portion 62 sandwiched between the opposing thermosetting resin layers 38, the ventilation passage 63 The shape is maintained. Therefore, it is possible to suppress damage to the ventilation passage 63 in the mounting portion 62 during heat bonding.

　尚、本実施形態の弁装置５０を第２～第４実施形態の電動自動車１の蓄電デバイス１０に設けてもよい。 The valve device 50 of the present embodiment may be provided in the power storage device 10 of the electric vehicle 1 of the second to fourth embodiments.

　＜第８実施形態＞
　次に、図２９は第８実施形態の電動自動車１の蓄電デバイス１０の弁装置５０の正面図を示している。説明の便宜上、前述の図１～図１８に示す第１実施形態と同様の部分には同一の符号を付している。本実施形態は第１実施形態に対して弁装置５０の取付部６２の形状が異なっている。その他の部分は第１実施形態と同様である。 <8th Embodiment>
Next, FIG. 29 shows a front view of the valve device 50 of the power storage device 10 of the electric vehicle 1 of the eighth embodiment. For convenience of explanation, the same parts as those in the first embodiment shown in FIGS. 1 to 18 are designated by the same reference numerals. In this embodiment, the shape of the mounting portion 62 of the valve device 50 is different from that in the first embodiment. Other parts are the same as those in the first embodiment.

　本実施形態に係る弁装置５０の取付部６２は外表面に粗面加工が施され、梨地に形成されている。これにより、取付部６２は外表面の表面粗さＲａは例えば、１μｍ～２０μｍになっている。 The mounting portion 62 of the valve device 50 according to the present embodiment has a roughened outer surface and is formed in a satin finish. As a result, the surface roughness Ra of the outer surface of the mounting portion 62 is, for example, 1 μm to 20 μm.

　本実施形態によると、取付部６２の外表面が梨地であるため、取付部６２に当接した位置において熱接着性樹脂層３８との接着強度を向上することができる。従って、取付部６２の外表面が滑らかな場合と比較して、弁装置５０の取付部６２を外装部材２０に強固に固定することができる。 According to the present embodiment, since the outer surface of the mounting portion 62 is satin finished, the adhesive strength with the thermosetting resin layer 38 can be improved at the position where the mounting portion 62 is in contact with the mounting portion 62. Therefore, the mounting portion 62 of the valve device 50 can be firmly fixed to the exterior member 20 as compared with the case where the outer surface of the mounting portion 62 is smooth.

　尚、本実施形態の弁装置５０を第２～第４実施形態の電動自動車１の蓄電デバイス１０に設けてもよい。 The valve device 50 of the present embodiment may be provided in the power storage device 10 of the electric vehicle 1 of the second to fourth embodiments.

　＜第９実施形態＞
　次に、図３０、図３１は第９実施形態の電動自動車１の蓄電デバイス１０の弁装置５０の正面図及び取付部６２の縦断面図を示している。説明の便宜上、前述の図１～図１８に示す第１実施形態と同様の部分には同一の符号を付している。本実施形態は第１実施形態に対して弁装置５０の取付部６２の形状が異なっている。その他の部分は第１実施形態と同様である。 <9th embodiment>
Next, FIGS. 30 and 31 show a front view of the valve device 50 of the power storage device 10 of the electric vehicle 1 of the ninth embodiment and a vertical sectional view of the mounting portion 62. For convenience of explanation, the same parts as those in the first embodiment shown in FIGS. 1 to 18 are designated by the same reference numerals. In this embodiment, the shape of the mounting portion 62 of the valve device 50 is different from that in the first embodiment. Other parts are the same as those in the first embodiment.

　取付部６２の外表面には、周方向に連続して延びる凸条部６６が形成されている。凸条部６６は、軸方向に３本並設されている。尚、凸条部６６は、必ずしも３本である必要はなく、少なくとも１本形成されていればよい。 On the outer surface of the mounting portion 62, a ridge portion 66 extending continuously in the circumferential direction is formed. Three ridges 66 are arranged side by side in the axial direction. It should be noted that the number of the convex portions 66 does not necessarily have to be three, and at least one may be formed.

　凸条部６６の縦断面は半円形状に形成され、凸条部６６の半径は例えば、０．０５ｍｍ～１．０ｍｍである。凸条部６６上の取付部６２の直径Ｌ１２（Ｘ方向及びＹ方向の長さ）は、凸条部６６が形成されていない部分の直径Ｌ１１よりも長い。 The vertical cross section of the ridge portion 66 is formed in a semicircular shape, and the radius of the ridge portion 66 is, for example, 0.05 mm to 1.0 mm. The diameter L12 (lengths in the X and Y directions) of the mounting portion 62 on the ridge portion 66 is longer than the diameter L11 of the portion where the ridge portion 66 is not formed.

　外装部材２０の熱接着時に、凸条部６６は熱接着性樹脂層３８に確実に接するため、包装材１５、２５に融着しやすい。凸条部６６は取付部６２の外表面の周方向に連続して延びているため、取付部６２の周方向一周において熱接着性樹脂層３８と取付部とを融着させることができる。 When the exterior member 20 is heat-bonded, the ridge portion 66 is surely in contact with the heat-adhesive resin layer 38, so that it is easily fused to the packaging materials 15 and 25. Since the ridge portion 66 extends continuously in the circumferential direction of the outer surface of the mounting portion 62, the thermosetting resin layer 38 and the mounting portion can be fused around the circumferential direction of the mounting portion 62.

　また、取付部６２の外表面と熱接着性樹脂層３８との接触面積が大きくなっているため、弁装置５０の取付部６２を包装材１５、２５に強固に固定することができる。 Further, since the contact area between the outer surface of the mounting portion 62 and the thermosetting resin layer 38 is large, the mounting portion 62 of the valve device 50 can be firmly fixed to the packaging materials 15 and 25.

　凸条部６６の形成位置は周方向に延びていれば一周全体に存在していなくてもよく、連続していなくてもよい。また、凸条部６６は周方向に間欠的に形成することも可能である。 The formation position of the ridge portion 66 does not have to exist in the entire circumference as long as it extends in the circumferential direction, and may not be continuous. Further, the ridge portion 66 can be formed intermittently in the circumferential direction.

　例えば、第６実施形態のような翼状延端部６４（図２６参照）を備える場合には、翼状延端部６４の全体または先端部分に凸条部６６を設けない構成にしてもよい。 For example, when the wing-shaped extension portion 64 (see FIG. 26) is provided as in the sixth embodiment, the ridge portion 66 may not be provided on the entire or the tip portion of the wing-shaped extension portion 64.

　尚、本実施形態の弁装置５０を第２～第４実施形態の電動自動車１の蓄電デバイス１０に設けてもよい。 The valve device 50 of the present embodiment may be provided in the power storage device 10 of the electric vehicle 1 of the second to fourth embodiments.

　＜第１０実施形態＞
　次に、図３２、図３３は第１０実施形態の電動自動車１の蓄電デバイス１０の弁装置５０の正面図及び横断面図を示している。説明の便宜上、前述の図１～図１８に示す第１実施形態と同様の部分には同一の符号を付している。本実施形態は第１実施形態に対して弁装置５０の弁機能部５２及び取付部６２の形状が異なっている。その他の部分は第１実施形態と同様である。 <10th Embodiment>
Next, FIGS. 32 and 33 show a front view and a cross-sectional view of the valve device 50 of the power storage device 10 of the electric vehicle 1 of the tenth embodiment. For convenience of explanation, the same parts as those in the first embodiment shown in FIGS. 1 to 18 are designated by the same reference numerals. In this embodiment, the shapes of the valve function portion 52 and the mounting portion 62 of the valve device 50 are different from those of the first embodiment. Other parts are the same as those in the first embodiment.

　弁機能部５２の断面形状はＹ方向の一端面が平面の半円形状に形成される。また、取付部６２はＸ方向の両端部に翼状延端部６４が設けられ、Ｙ方向の一端面が平面に形成される。弁機能部５２及び取付部６２の外表面上のＸ方向に平行な平面は面一になっている。 The cross-sectional shape of the valve function portion 52 is a semicircular shape with one end surface in the Y direction flat. Further, the mounting portion 62 is provided with wing-shaped extending ends 64 at both ends in the X direction, and one end surface in the Y direction is formed flat. The planes parallel to the X direction on the outer surfaces of the valve function portion 52 and the mounting portion 62 are flush with each other.

　図３４は、弁装置５０の外装部材２０への取り付け時の様子を示す図である。同図に示すように、弁装置５０は外装部材２０への取り付け際に、平面部分を包装材２５の最内層の面上に載置される。この時、弁装置５０が転がらないため弁装置５０の位置決めを容易に行なうことができる。 FIG. 34 is a diagram showing a state when the valve device 50 is attached to the exterior member 20. As shown in the figure, when the valve device 50 is attached to the exterior member 20, the flat surface portion is placed on the innermost surface of the packaging material 25. At this time, since the valve device 50 does not roll, the valve device 50 can be easily positioned.

　また、弁装置５０による周縁シール部２１が突出する方向と、収納部１６が突出する方向とを同じにすることができる。このため、蓄電デバイスパック５（図３参照）のＹ方向の一端（図３の左端）に配される蓄電デバイス１０が弁装置５０によってＹ方向に突出することを回避できる。従って、蓄電デバイスパック５の小型化を図ることができる。 Further, the direction in which the peripheral seal portion 21 of the valve device 50 protrudes and the direction in which the storage portion 16 protrudes can be the same. Therefore, it is possible to prevent the power storage device 10 arranged at one end (left end in FIG. 3) of the power storage device pack 5 (see FIG. 3) in the Y direction from protruding in the Y direction by the valve device 50. Therefore, the power storage device pack 5 can be miniaturized.

　本実施形態において、弁機能部５２及び取付部６２の一方のみに外表面にＸ方向に平行な平面を設けてもよい。 In the present embodiment, a flat surface parallel to the X direction may be provided on the outer surface of only one of the valve function portion 52 and the mounting portion 62.

　尚、本実施形態の弁装置５０を第２～第４実施形態の電動自動車１の蓄電デバイス１０に設けてもよい。 The valve device 50 of the present embodiment may be provided in the power storage device 10 of the electric vehicle 1 of the second to fourth embodiments.

　＜第１１実施形態＞
　次に、図３５は第１１実施形態の電動自動車１の蓄電デバイス１０の弁装置５０の横断面図を示している。説明の便宜上、前述の図１～図１８に示す第１実施形態と同様の部分には同一の符号を付している。本実施形態は第１実施形態に対して弁装置５０の取付部６２の形状が異なっている。その他の部分は第１実施形態と同様である。 <11th Embodiment>
Next, FIG. 35 shows a cross-sectional view of the valve device 50 of the power storage device 10 of the electric vehicle 1 of the eleventh embodiment. For convenience of explanation, the same parts as those in the first embodiment shown in FIGS. 1 to 18 are designated by the same reference numerals. In this embodiment, the shape of the mounting portion 62 of the valve device 50 is different from that in the first embodiment. Other parts are the same as those in the first embodiment.

　同図に示すように、取付部６２の断面は、ひし形形状を有している。取付部のＸ方向の長さＬ７は、Ｙ方向の長さＬ８よりも長い。これにより、周縁シール部２１のＹ方向の取付部６２上の長さＬ４（図１４参照）と、取付部６２を挟まれていない部分の長さＬ３（図１４参照）との差をより小さくできる。従って、弁装置５０の取付部６２を外装部材２０により強固に固定することができる。 As shown in the figure, the cross section of the mounting portion 62 has a rhombus shape. The length L7 of the mounting portion in the X direction is longer than the length L8 in the Y direction. As a result, the difference between the length L4 (see FIG. 14) on the mounting portion 62 in the Y direction of the peripheral seal portion 21 and the length L3 (see FIG. 14) of the portion where the mounting portion 62 is not sandwiched is made smaller. it can. Therefore, the mounting portion 62 of the valve device 50 can be firmly fixed by the exterior member 20.

　尚、本実施形態の弁装置５０を第２～第４実施形態の電動自動車１の蓄電デバイス１０に設けてもよい。 The valve device 50 of the present embodiment may be provided in the power storage device 10 of the electric vehicle 1 of the second to fourth embodiments.

　＜第１２実施形態＞
　次に、図３６は第１２実施形態の電動自動車１の蓄電デバイス１０の弁装置５０の横断面図を示している。説明の便宜上、前述の図１～図１８に示す第１実施形態と同様の部分には同一の符号を付している。本実施形態は第１実施形態に対して弁装置５０の取付部６２の形状が異なっている。その他の部分は第１実施形態と同様である。 <12th Embodiment>
Next, FIG. 36 shows a cross-sectional view of the valve device 50 of the power storage device 10 of the electric vehicle 1 of the twelfth embodiment. For convenience of explanation, the same parts as those in the first embodiment shown in FIGS. 1 to 18 are designated by the same reference numerals. In this embodiment, the shape of the mounting portion 62 of the valve device 50 is different from that in the first embodiment. Other parts are the same as those in the first embodiment.

　同図に示すように、取付部６２の断面は、ひし形をＹ方向の両端部で面取りした形状で、六角形に形成される。取付部のＸ方向の長さＬ９は、Ｙ方向の長さＬ１０よりも長い。これにより、周縁シール部２１のＹ方向の取付部６２上の長さＬ４（図１４参照）と、取付部６２を挟まれていない部分の長さＬ３（図１４参照）との差をより小さくできる。従って、外装部材２０に弁装置５０の取付部６２をより強固に固定することができる。 As shown in the figure, the cross section of the mounting portion 62 is formed in a hexagonal shape with a diamond shape chamfered at both ends in the Y direction. The length L9 of the mounting portion in the X direction is longer than the length L10 in the Y direction. As a result, the difference between the length L4 (see FIG. 14) on the mounting portion 62 in the Y direction of the peripheral seal portion 21 and the length L3 (see FIG. 14) of the portion where the mounting portion 62 is not sandwiched is made smaller. it can. Therefore, the mounting portion 62 of the valve device 50 can be more firmly fixed to the exterior member 20.

　尚、本実施形態の弁装置５０を第２～第４実施形態の電動自動車１の蓄電デバイス１０に設けてもよい。 The valve device 50 of the present embodiment may be provided in the power storage device 10 of the electric vehicle 1 of the second to fourth embodiments.

　＜第１３実施形態＞
　次に、図３７は第１３実施形態の電動自動車１の蓄電デバイス１０の弁装置５０の横断面図を示している。説明の便宜上、前述の図１～図１８に示す第１実施形態と同様の部分には同一の符号を付している。本実施形態は第１実施形態に対して弁装置５０の取付部６２の形状が異なっている。その他の部分は第１実施形態と同様である。 <13th Embodiment>
Next, FIG. 37 shows a cross-sectional view of the valve device 50 of the power storage device 10 of the electric vehicle 1 of the thirteenth embodiment. For convenience of explanation, the same parts as those in the first embodiment shown in FIGS. 1 to 18 are designated by the same reference numerals. In this embodiment, the shape of the mounting portion 62 of the valve device 50 is different from that in the first embodiment. Other parts are the same as those in the first embodiment.

　同図に示すように、取付部６２はひし形形状を有し、Ｘ方向の両端部に翼状延端部６４が形成されている。各翼状延端部６４はＸ方向の端部に近づくほど薄くなる形状を有している。また、別の観点からは、各翼状延端部６４は取付部６２の他の部分（ひし形部分）と比較して、Ｙ方向（収納部１６の深さ方向）の長さの変化が緩やかな部分ともいえる。 As shown in the figure, the mounting portion 62 has a rhombus shape, and wing-shaped extension portions 64 are formed at both ends in the X direction. Each wing-shaped extending end portion 64 has a shape that becomes thinner as it approaches the end portion in the X direction. From another point of view, the length of each wing-shaped extension portion 64 changes more slowly in the Y direction (depth direction of the storage portion 16) than the other portion (diamond-shaped portion) of the mounting portion 62. It can be said to be a part.

　本実施形態によると、翼状延端部６４が設けられていない場合と比較して、周縁シール部２１の取付部６２が挟まれていない部分から挟まれている部分へのＹ方向の長さの変化が滑らかである。このため、熱接着時に取付部６２の周面に容易に熱接着性樹脂層３８を密着させることができ、外装部材２０に取付部６２をより強固に固定することができる。 According to the present embodiment, the length in the Y direction from the portion where the attachment portion 62 of the peripheral edge seal portion 21 is not sandwiched to the portion sandwiched is as compared with the case where the wing-shaped extended end portion 64 is not provided. The change is smooth. Therefore, the thermosetting resin layer 38 can be easily brought into close contact with the peripheral surface of the mounting portion 62 at the time of heat bonding, and the mounting portion 62 can be more firmly fixed to the exterior member 20.

　尚、本実施形態の弁装置５０を第２～第４実施形態の電動自動車１の蓄電デバイス１０に設けてもよい。 The valve device 50 of the present embodiment may be provided in the power storage device 10 of the electric vehicle 1 of the second to fourth embodiments.

　＜第１４実施形態＞
　次に、図３８は第１４実施形態の電動自動車１の蓄電デバイス１０の弁装置５０の横断面図を示している。説明の便宜上、前述の図１～図１８に示す第１実施形態と同様の部分には同一の符号を付している。本実施形態は第１実施形態に対して弁装置５０の取付部６２の形状が異なっている。その他の部分は第１実施形態と同様である。 <14th Embodiment>
Next, FIG. 38 shows a cross-sectional view of the valve device 50 of the power storage device 10 of the electric vehicle 1 of the 14th embodiment. For convenience of explanation, the same parts as those in the first embodiment shown in FIGS. 1 to 18 are designated by the same reference numerals. In this embodiment, the shape of the mounting portion 62 of the valve device 50 is different from that in the first embodiment. Other parts are the same as those in the first embodiment.

　同図によると、取付部６２の断面は六角形（多角形）形状を有している。六角形の各コーナーには、コーナーＲ（例えば、Ｒ＝０．２ｍｍ～２．０ｍｍ）が形成されている。 According to the figure, the cross section of the mounting portion 62 has a hexagonal (polygonal) shape. Corners R (for example, R = 0.2 mm to 2.0 mm) are formed at each corner of the hexagon.

　本実施形態によると、多角形の取付部６２の各コーナーにコーナーＲを設けたので、取付部６２の熱接着性樹脂層３８に挟まれた部分が熱接着性樹脂層３８を傷つける可能性を低くすることができる。このため、熱接着性樹脂層３８の絶縁性低下を防止することができる。 According to the present embodiment, since the corners R are provided at each corner of the polygonal mounting portion 62, the portion of the mounting portion 62 sandwiched between the thermosetting resin layers 38 may damage the thermosetting resin layer 38. Can be lowered. Therefore, it is possible to prevent a decrease in the insulating property of the thermosetting resin layer 38.

　尚、本実施形態の弁装置５０を第２～第４実施形態の電動自動車１の蓄電デバイス１０に設けてもよい。 The valve device 50 of the present embodiment may be provided in the power storage device 10 of the electric vehicle 1 of the second to fourth embodiments.

　＜第１５実施形態＞
　次に、図３９、図４０は第１５実施形態の電動自動車１の蓄電デバイス１０の包装材１５の正面図及び要部を拡大した上面図を示している。説明の便宜上、前述の図１～図１８に示す第１実施形態と同様の部分には同一の符号を付している。本実施形態はフランジ部１７に弁装置配置部１７ａが設けられる。その他の部分は第１実施形態と同様である。 <15th Embodiment>
Next, FIGS. 39 and 40 show a front view of the packaging material 15 of the power storage device 10 of the electric vehicle 1 of the fifteenth embodiment and an enlarged top view of a main part. For convenience of explanation, the same parts as those in the first embodiment shown in FIGS. 1 to 18 are designated by the same reference numerals. In this embodiment, the flange portion 17 is provided with a valve device arrangement portion 17a. Other parts are the same as those in the first embodiment.

　フランジ部１７に形成された弁装置配置部１７ａは半円形状を有している。弁装置配置部１７ａの半円形状の直径は、取付部６２の直径よりも僅かに長い。弁装置配置部１７ａに取付部６２が配置された状態で、外装部材２０の周縁の熱接着が行なわれる。これにより、熱接着時の包装材１５の変形が抑制され、取付部６２付近でピンホールや破れが生じる可能性を低減することができる。 The valve device arrangement portion 17a formed on the flange portion 17 has a semicircular shape. The diameter of the semicircular shape of the valve device arrangement portion 17a is slightly longer than the diameter of the attachment portion 62. With the mounting portion 62 arranged on the valve device arranging portion 17a, thermal bonding is performed on the peripheral edge of the exterior member 20. As a result, deformation of the packaging material 15 during thermal bonding is suppressed, and the possibility of pinholes or tears occurring in the vicinity of the mounting portion 62 can be reduced.

　尚、弁装置配置部１７ａは包装材２５に設けられてもよい。この場合であっても、弁装置配置部１７ａが包装材１５に設けられた場合と同様の効果を得ることができる。 The valve device arrangement portion 17a may be provided on the packaging material 25. Even in this case, the same effect as when the valve device arrangement portion 17a is provided on the packaging material 15 can be obtained.

　＜第１６実施形態＞
　次に、図４１は第１６実施形態の電動自動車１の蓄電デバイス１０の正面図を示している。説明の便宜上、前述の図１～図１８に示す第１実施形態と同様の部分には同一の符号を付している。本実施形態は周縁シール部２１の弁装置５０が取付けられる部分の形状が第１実施形態と異なっている。その他の部分は第１実施形態と同様である。 <16th Embodiment>
Next, FIG. 41 shows a front view of the power storage device 10 of the electric vehicle 1 of the 16th embodiment. For convenience of explanation, the same parts as those in the first embodiment shown in FIGS. 1 to 18 are designated by the same reference numerals. In this embodiment, the shape of the portion of the peripheral seal portion 21 to which the valve device 50 is attached is different from that of the first embodiment. Other parts are the same as those in the first embodiment.

　図４２は図４１のＪ部拡大図を示している。同図に示すように、弁装置５０の取付部６２は周縁シール部２１上に配される。弁機能部５２の内端部は周縁シール部２１の外側端縁Ｐ１に接しておらず、外側端縁Ｐ１から外側に間隔をあけて配される。周縁シール部２１は取付部６２の近傍において、外側に窪む凹部２１ａを有する。より具体的には、周縁シール部２１の内側端縁Ｐ２（図９参照）は取付部６２の近傍において内側端縁Ｐ２の延びる方向に沿って互いに隣接する３つのラインＫ１～Ｋ３上に配される。 FIG. 42 shows an enlarged view of part J of FIG. 41. As shown in the figure, the attachment portion 62 of the valve device 50 is arranged on the peripheral edge seal portion 21. The inner end portion of the valve function portion 52 is not in contact with the outer edge P1 of the peripheral edge seal portion 21, and is arranged at intervals from the outer edge P1 to the outside. The peripheral edge seal portion 21 has a recess 21a recessed outward in the vicinity of the mounting portion 62. More specifically, the inner edge P2 (see FIG. 9) of the peripheral edge seal portion 21 is arranged on three lines K1 to K3 adjacent to each other along the extending direction of the inner edge P2 in the vicinity of the mounting portion 62. To.

　ラインＫ１（第１ライン）は取付部６２と交差する。ラインＫ２（第２ライン）はラインＫ１の一端に連続し、ラインＫ３（第３ライン）はラインＫ１の他端に連続する。ラインＫ２及びラインＫ３は、Ｚ方向に同じ位置でＸ方向に延びている。ラインＫ１はラインＫ２の端部から外側に向かって斜め方向に延びてＸ方向に屈曲して取付部６２を跨ぎ、内側に向かって斜め方向に延びてラインＫ３に連結される。 Line K1 (first line) intersects the mounting portion 62. The line K2 (second line) is continuous with one end of the line K1, and the line K3 (third line) is continuous with the other end of the line K1. Line K2 and line K3 extend in the X direction at the same position in the Z direction. The line K1 extends diagonally outward from the end of the line K2, bends in the X direction, straddles the mounting portion 62, extends diagonally inward, and is connected to the line K3.

　即ち、ラインＫ１はラインＫ２及びラインＫ３よりも外側に位置し、ラインＫ２とラインＫ３との間において両ラインＫ２、Ｋ３よりも外側をＸ方向に延びている。その結果、外装部材２０は蓄電素子１１が配置される収納部１６内の空間Ｓ１から、取付部６２の近傍において取付部６２に向かって外側に突出する空間Ｓ３を有する。 That is, the line K1 is located outside the lines K2 and K3, and extends in the X direction between the lines K2 and K3 outside the lines K2 and K3. As a result, the exterior member 20 has a space S3 that projects outward from the space S1 in the storage portion 16 in which the power storage element 11 is arranged toward the mounting portion 62 in the vicinity of the mounting portion 62.

　取付部６２の内端６２ａはフランジ部１７の内側端縁Ｐ３（収納部１６の外側端縁、図９参照）よりも外側に位置する。このため、取付部６２の内端部が収納部１６内に配置される蓄電素子１１に接触する可能性が低くなり、蓄電素子１１を傷つけることを抑制することができる。 The inner end 62a of the mounting portion 62 is located outside the inner edge P3 of the flange portion 17 (outer edge of the storage portion 16, see FIG. 9). Therefore, the possibility that the inner end portion of the mounting portion 62 comes into contact with the power storage element 11 arranged in the storage portion 16 is reduced, and damage to the power storage element 11 can be suppressed.

　また、取付部６２の内端６２ａは周縁シール部２１の内側端縁Ｐ２（図９参照）まで達しており、そこからさらに収納部１６に向かって突出している。これにより、筐体５１の内端部には弁機構の閉状態において収納部１６に連通する開口が形成されている。尚、取付部６２の内端６２ａは空間Ｓ３内に位置し、収納部１６の内部には達していない。 Further, the inner end 62a of the mounting portion 62 reaches the inner edge P2 (see FIG. 9) of the peripheral edge sealing portion 21, and further protrudes toward the storage portion 16. As a result, an opening communicating with the storage portion 16 is formed at the inner end portion of the housing 51 in the closed state of the valve mechanism. The inner end 62a of the mounting portion 62 is located in the space S3 and does not reach the inside of the storage portion 16.

　また、取付部６２の内端６２ａがフランジ部１７の内側端縁Ｐ３（収納部１６の外側端縁）よりも外側であっても、蓄電デバイス１０の使用状況によって蓄電素子１１に接触する可能性がある。このため、取付部６２の内端部の外周部には第１実施形態と同様にコーナーＲ（図１１参照）が形成される。 Further, even if the inner end 62a of the mounting portion 62 is outside the inner edge P3 (outer edge of the storage portion 16) of the flange portion 17, it may come into contact with the power storage element 11 depending on the usage status of the power storage device 10. There is. Therefore, a corner R (see FIG. 11) is formed on the outer peripheral portion of the inner end portion of the mounting portion 62 as in the first embodiment.

　図４３は弁装置５０の他の取り付け例を示し、図４１のＪ部拡大図を示している。同図によると、弁機能部５２の内端部が周縁シール部２１の外側端縁Ｐ１に接して弁装置５０が取り付けられる。この場合、弁機能部５２と取付部６２との間の段差を利用することにより、周縁シール部２１に対する弁装置５０の位置決めを確実に行うことができる。従って、Ｚ方向の取付部６２の長さを周縁シール部２１のシール幅よりも長く設計しておくことで、空間Ｓ３内において取付部６２の内端６２ａを周縁シール部２１の内側端縁Ｐ２から確実に突出させることができる。 FIG. 43 shows another mounting example of the valve device 50, and shows an enlarged view of the J portion of FIG. 41. According to the figure, the valve device 50 is attached so that the inner end portion of the valve function portion 52 is in contact with the outer end edge P1 of the peripheral edge seal portion 21. In this case, the valve device 50 can be reliably positioned with respect to the peripheral seal portion 21 by utilizing the step between the valve function portion 52 and the mounting portion 62. Therefore, by designing the length of the mounting portion 62 in the Z direction to be longer than the sealing width of the peripheral edge sealing portion 21, the inner end 62a of the mounting portion 62 is set to the inner edge P2 of the peripheral edge sealing portion 21 in the space S3. Can be reliably projected from.

　本実施形態によると、第１実施形態と同様に、収納部１６の深さ方向に垂直な面内で直交するＸ方向（第１方向）及びＺ方向（第２方向）がそれぞれ電動自動車１の左右方向及び高さ方向に配置される。これにより、複数の蓄電デバイス１０を積み重ねた際の加重による外装部材２０の破損を防止することができる。また、外装部材２０の周縁シール部２１に弁装置５０が取り付けられるため、ガス抜きを行う圧力の正確な制御が可能となる。 According to the present embodiment, as in the first embodiment, the X direction (first direction) and the Z direction (second direction) orthogonal to each other in the plane perpendicular to the depth direction of the storage portion 16 of the electric vehicle 1 It is arranged in the left-right direction and the height direction. As a result, it is possible to prevent damage to the exterior member 20 due to the load when a plurality of power storage devices 10 are stacked. Further, since the valve device 50 is attached to the peripheral seal portion 21 of the exterior member 20, it is possible to accurately control the pressure for degassing.

　また、取付部６２の内端６２ａがフランジ部１７の内側端縁Ｐ３（収納部１６の外側端縁）よりも外側に位置する。このため、取付部６２の内端部が、収納部１６内に配置される蓄電素子１１に接触する可能性が低くなり、蓄電素子１１を傷つけることを抑制することができる。 Further, the inner end 62a of the mounting portion 62 is located outside the inner edge P3 (outer edge of the storage portion 16) of the flange portion 17. Therefore, the possibility that the inner end portion of the mounting portion 62 comes into contact with the power storage element 11 arranged in the storage portion 16 is reduced, and damage to the power storage element 11 can be suppressed.

　この時、弁機能部５２（第１部分）の外形が取付部６２（第２部分）の外形から収納部１６の深さ方向（Ｙ方向）においてはみ出している。また、弁機能部５２（第１部分）は取付部６２（第２部分）よりも通気路６３の延びる方向に直交する断面における断面積が大きい。これにより、上記と同様に、蓄電デバイス１０の絶縁破壊を防止しつつ、対向する熱接着性樹脂層３８を適切に熱接着して取付部６２を外装部材２０に強固に固定することができる。 At this time, the outer shape of the valve function portion 52 (first portion) protrudes from the outer shape of the mounting portion 62 (second portion) in the depth direction (Y direction) of the storage portion 16. Further, the valve function portion 52 (first portion) has a larger cross-sectional area than the mounting portion 62 (second portion) in the cross section orthogonal to the extending direction of the air passage 63. As a result, similarly to the above, the mounting portion 62 can be firmly fixed to the exterior member 20 by appropriately heat-bonding the opposing thermosetting resin layers 38 while preventing dielectric breakdown of the power storage device 10.

　また、弁装置５０の内端はフランジ部１７の内側端縁Ｐ３（収納部１６の外側端縁）よりも外側で周縁シール部２１の内側端縁Ｐ２まで達し、筐体５１の内端部には弁機構の閉状態において収納部１６に連通する開口が形成されている。このため、周縁シール部２１の形成時に溶融した包装材１５、２５の一部が開口を介して通気路６３内に入り込むことによる通気路６３の目詰まりを防止できる。 Further, the inner end of the valve device 50 reaches the inner end edge P2 of the peripheral edge sealing portion 21 on the outer side of the inner edge P3 (outer edge of the storage portion 16) of the flange portion 17, and reaches the inner end portion of the housing 51. Is formed with an opening communicating with the storage portion 16 in the closed state of the valve mechanism. Therefore, it is possible to prevent clogging of the ventilation passage 63 due to a part of the packaging materials 15 and 25 melted during the formation of the peripheral seal portion 21 entering the ventilation passage 63 through the opening.

　また、弁装置５０が外装部材２０の周縁シール部２１の内側端縁Ｐ２から収納部１６に向かって突出している。すなわち、弁装置５０の内端部が周縁シール部２１から距離をあけている。そのため、周縁シール部２１の形成時に、周縁シール部２１に加わる熱や圧力等の弁装置５０を故障させる原因が弁装置５０の内端部に作用し難くなる。従って、弁装置５０の取り付け時の故障を抑制することができる。 Further, the valve device 50 projects from the inner edge P2 of the peripheral edge seal portion 21 of the exterior member 20 toward the storage portion 16. That is, the inner end portion of the valve device 50 is separated from the peripheral edge sealing portion 21. Therefore, when the peripheral edge seal portion 21 is formed, the cause of failure of the valve device 50 such as heat and pressure applied to the peripheral edge seal portion 21 is less likely to act on the inner end portion of the valve device 50. Therefore, it is possible to suppress a failure when the valve device 50 is attached.

　尚、第２～第１５実施形態の電動自動車１の蓄電デバイス１０に本実施形態と同様の凹部２１ａを設けてもよい。 Note that the power storage device 10 of the electric vehicle 1 of the second to fifteenth embodiments may be provided with the same recess 21a as in the present embodiment.

　＜第１７実施形態＞
　次に、図４４は第１７実施形態の電動自動車１の蓄電デバイス１０の正面図を示している。図４５は図４４のＧ－Ｇ断面図を示している。説明の便宜上、前述の図１～図１８に示す第１実施形態と同様の部分には同一の符号を付している。本実施形態は周縁シール部２１の弁装置５０が取付けられる部分の形状が第１実施形態と異なっている。その他の部分は第１実施形態と同様である。 <17th Embodiment>
Next, FIG. 44 shows a front view of the power storage device 10 of the electric vehicle 1 of the 17th embodiment. FIG. 45 shows a cross-sectional view taken along the line GG of FIG. For convenience of explanation, the same parts as those in the first embodiment shown in FIGS. 1 to 18 are designated by the same reference numerals. In this embodiment, the shape of the portion of the peripheral seal portion 21 to which the valve device 50 is attached is different from that of the first embodiment. Other parts are the same as those in the first embodiment.

　弁装置５０の弁機能部５２は周縁シール部２１よりも外側に位置した外側部分を形成する。弁装置５０の取付部６２は周縁シール部２１において包装材１５、２５の熱接着性樹脂層３８（図７参照）に挟まれる。周縁シール部２１の取付部６２を挟む挟持部分の外表面には、凹条部２３及び凸条部２４によって凹凸が設けられる。 The valve function portion 52 of the valve device 50 forms an outer portion located outside the peripheral seal portion 21. The attachment portion 62 of the valve device 50 is sandwiched between the thermosetting resin layers 38 (see FIG. 7) of the packaging materials 15 and 25 at the peripheral seal portion 21. The outer surface of the sandwiching portion that sandwiches the mounting portion 62 of the peripheral seal portion 21 is provided with irregularities by the concave portion 23 and the convex portion 24.

　図４６は周縁シール部２１の取付部６２が挟まれている部分を示す拡大図である。凹条部２３は周縁シール部２１が延びた方向（Ｘ方向）に沿って弁装置５０の周方向に延び、周縁シール部２１の外面上に凹設される。凹条部２３の深さＤ１は包装材１５、２５の厚みに応じて例えば、０．０５ｍｍ～０．１ｍｍである。凹条部２３の底部はＹＺ断面上で半円状のコーナーＲを形成され、丸みを帯びている。 FIG. 46 is an enlarged view showing a portion where the mounting portion 62 of the peripheral seal portion 21 is sandwiched. The recessed portion 23 extends in the circumferential direction of the valve device 50 along the extending direction (X direction) of the peripheral edge sealing portion 21, and is recessed on the outer surface of the peripheral edge sealing portion 21. The depth D1 of the recessed portion 23 is, for example, 0.05 mm to 0.1 mm depending on the thickness of the packaging materials 15 and 25. The bottom of the concave portion 23 has a semicircular corner R formed on the YZ cross section and is rounded.

　また、凹条部２３はＺ方向に複数並設され、複数の凹条部２３間に凸条部２４が形成される。これにより、凸条部２４は収納部１６（図４５参照）の深さ方向（Ｙ方向）の外側に突出している。即ち、包装材１５上の凸条部２４（第１凸部）は凹条部２３（第１凹部）よりも収納部１６（図４５参照）の深さ方向の一方の外側に突出している。包装材２５上の凸条部２４（第２凸部）は凹条部２３（第２凹部）よりも収納部１６（図４５参照）の深さ方向の他方の外側に突出している。 Further, a plurality of concave portions 23 are arranged side by side in the Z direction, and a convex portion 24 is formed between the plurality of concave portions 23. As a result, the ridge portion 24 projects outward in the depth direction (Y direction) of the storage portion 16 (see FIG. 45). That is, the convex portion 24 (first convex portion) on the packaging material 15 projects more outward than the concave portion 23 (first concave portion) in the depth direction of the storage portion 16 (see FIG. 45). The convex portion 24 (second convex portion) on the packaging material 25 projects more outward than the concave portion 23 (second concave portion) of the storage portion 16 (see FIG. 45) in the depth direction.

　周縁シール部２１はヒートシール工程（図１７参照）において、ヒートシール装置により形成される。図４７はヒートシール装置８０の概略構成図を示している。ヒートシール装置８０は包装材１５、２５の周縁上の弁装置５０を設けた辺に圧力及び熱を加えて熱接着し、周縁シール部２１を形成する。尚、弁装置５０を設けていない辺は、後述する凸条部８２ａを省いた他のヒートシール装置により周縁シール部２１が形成される。 The peripheral seal portion 21 is formed by a heat seal device in the heat seal process (see FIG. 17). FIG. 47 shows a schematic configuration diagram of the heat sealing device 80. The heat sealing device 80 applies pressure and heat to the sides of the packaging materials 15 and 25 provided with the valve device 50 and heat-bonds them to form the peripheral sealing portion 21. On the side where the valve device 50 is not provided, the peripheral edge sealing portion 21 is formed by another heat sealing device omitting the ridge portion 82a described later.

　ヒートシール装置８０は、基部８１上にヒートシールヘッド８２を設けたヒートシールバーと、加熱部８３とを備えている。加熱部８３は、外部電源から供給される電力を用いることによってヒートシールヘッド８２を加熱するように構成されている。加熱部８３としては、公知のヒートシール装置に用いられている種々の構成を採用することができる。 The heat seal device 80 includes a heat seal bar provided with a heat seal head 82 on the base 81, and a heating unit 83. The heating unit 83 is configured to heat the heat seal head 82 by using electric power supplied from an external power source. As the heating unit 83, various configurations used in known heat sealing devices can be adopted.

　ヒートシールヘッド８２は包装材１５、２５の周縁に沿ってＸ方向に延び、周縁シール部２１と対向する面（挟み面）には複数の凸条部８２ａが設けられている。複数の凸条部８２ａ間に凹部が形成されるため、ヒートシールヘッド８２上に凹凸が設けられる。各凸条部８２ａはＸ方向に延び、各凸条部８２ａの先端にはＹＺ断面上で半円状のコーナーＲが形成されている。また、各凸条部８２ａの高さＨ１は例えば、０．０５ｍｍ～１ｍｍに形成される。 The heat seal head 82 extends in the X direction along the peripheral edges of the packaging materials 15 and 25, and a plurality of ridge portions 82a are provided on the surface (sandwiching surface) facing the peripheral edge seal portion 21. Since the recesses are formed between the plurality of convex portions 82a, the heat seal head 82 is provided with irregularities. Each convex portion 82a extends in the X direction, and a semicircular corner R is formed at the tip of each convex portion 82a on the YZ cross section. Further, the height H1 of each convex portion 82a is formed to be, for example, 0.05 mm to 1 mm.

　周縁シール部２１上の包装材１５、２５の取付部６２を挟む部分がヒートシールヘッド８２によって挟まれると、各凸条部８２ａが包装材１５、２５を取付部６２側に押し込む。ヒートシールヘッド８２によって押し込まれた位置において包装材１５、２５と取付部６２とが接合される。この時、凸条部８２ａによって深く押し込まれて形成された凹条部２３の位置において包装材１５、２５と取付部６２とがより強固に接合される。即ち、ヒートシールヘッド８２によって、必要以上に強い圧力を加えなくても凹条部２３において包装材１５、２５と取付部６２とを強固に接合することができる。 When the portion of the peripheral seal portion 21 that sandwiches the mounting portions 62 of the packaging materials 15 and 25 is sandwiched by the heat seal head 82, the convex strips 82a push the packaging materials 15 and 25 toward the mounting portion 62. The packaging materials 15 and 25 and the mounting portion 62 are joined at the position pushed by the heat seal head 82. At this time, the packaging materials 15 and 25 and the mounting portion 62 are more firmly joined at the position of the concave portion 23 formed by being deeply pushed by the convex portion 82a. That is, the heat seal head 82 can firmly join the packaging materials 15 and 25 and the mounting portion 62 at the recessed portion 23 without applying an unnecessarily strong pressure.

　従って、取付部６２の周囲における密封性の低下を抑制することができ、外装部材２０の密封性を維持することができる。また、熱接着性樹脂層３８を形成する熱接着性樹脂が凹条部２３によって区分けされるため、熱接着性樹脂が必要以上に流れない。このため、蓄電デバイス１０において熱接着性樹脂層３８全体（Ｚ方向にわたる全体）が必要以上に薄くならない。その結果、取付部６２の周囲、特に取付部６２の先端部における取付部６２と包装材１５とのシール部において絶縁破壊が生じる可能性を抑制することができる。 Therefore, it is possible to suppress a decrease in the sealing property around the mounting portion 62, and it is possible to maintain the sealing property of the exterior member 20. Further, since the thermosetting resin forming the thermosetting resin layer 38 is separated by the concave portion 23, the thermosetting resin does not flow more than necessary. Therefore, in the power storage device 10, the entire thermosetting resin layer 38 (the entire area extending in the Z direction) is not thinner than necessary. As a result, it is possible to suppress the possibility of dielectric breakdown occurring around the mounting portion 62, particularly at the sealing portion between the mounting portion 62 and the packaging material 15 at the tip portion of the mounting portion 62.

　また、ヒートシールヘッド８２の凸条部８２ａによって形成される凹条部２３の底部には半円状のコーナーＲ（例えば、Ｒ＝０．０２ｍｍ～１ｍｍ）が形成されている。即ち、蓄電デバイス１０の製造過程において、周縁シール部２１の外表面への凹条部２３の付与時に鋭利な部材は用いられていない。従って、蓄電デバイス１０の製造過程における外装部材２０の外表面の劣化を抑制することができる。 Further, a semicircular corner R (for example, R = 0.02 mm to 1 mm) is formed at the bottom of the concave portion 23 formed by the convex portion 82a of the heat seal head 82. That is, in the manufacturing process of the power storage device 10, no sharp member is used when the concave portion 23 is applied to the outer surface of the peripheral seal portion 21. Therefore, deterioration of the outer surface of the exterior member 20 in the manufacturing process of the power storage device 10 can be suppressed.

　本実施形態によると、周縁シール部２１は弁装置５０の取付部６２を挟む挟持部分の外表面に凹凸（凹条部２３及び凸条部２４）を形成される。周縁シール部２１上の凹凸はヒートシール装置８０のヒートシールヘッド８２に設けた凸条部８２ａによって容易に形成することができる。凸条部８２ａによる凹凸の形成により、ヒートシールヘッド８２によって必要以上に強い圧力を加えなくても包装材１５、２５の熱接着性樹脂層３８と取付部６２とを強固に接合できる。 According to the present embodiment, the peripheral edge seal portion 21 is formed with irregularities (concave portion 23 and ridge portion 24) on the outer surface of the sandwiching portion that sandwiches the mounting portion 62 of the valve device 50. The unevenness on the peripheral edge sealing portion 21 can be easily formed by the ridge portion 82a provided on the heat sealing head 82 of the heat sealing device 80. By forming the unevenness by the ridges 82a, the heat-adhesive resin layers 38 of the packaging materials 15 and 25 and the mounting portion 62 can be firmly joined without applying an unnecessarily strong pressure by the heat seal head 82.

　従って、取付部６２の周囲における密封性の低下を抑制することができ、外装部材２０の密封性を維持することができる。また、熱接着性樹脂層３８を形成する熱接着性樹脂が凹条部２３によって区分けされるため、熱接着性樹脂が必要以上に流れない。このため、蓄電デバイス１０において熱接着性樹脂層３８全体（Ｚ方向にわたる全体）が必要以上に薄くならない。その結果、取付部６２の周囲、特に取付部６２の先端部における取付部６２と包装材１５とのシール部において絶縁破壊が生じる可能性を抑制することができる。 Therefore, it is possible to suppress a decrease in the sealing property around the mounting portion 62, and it is possible to maintain the sealing property of the exterior member 20. Further, since the thermosetting resin forming the thermosetting resin layer 38 is separated by the concave portion 23, the thermosetting resin does not flow more than necessary. Therefore, in the power storage device 10, the entire thermosetting resin layer 38 (the entire area extending in the Z direction) is not thinner than necessary. As a result, it is possible to suppress the possibility of dielectric breakdown occurring around the mounting portion 62, particularly at the sealing portion between the mounting portion 62 and the packaging material 15 at the tip portion of the mounting portion 62.

　また、周縁シール部２１上の凹凸は弁装置５０の周方向に延びる凹条部２３により形成され、凹条部２３の深さは０．０５ｍｍ～０．１ｍｍに形成される。これにより、熱接着性樹脂層３８と取付部６２とを確実に接合できるとともに、周縁シール部２１形成時の包装材１５、２５の破損を防止することができる。 Further, the unevenness on the peripheral edge seal portion 21 is formed by the concave portion 23 extending in the circumferential direction of the valve device 50, and the depth of the concave portion 23 is formed to be 0.05 mm to 0.1 mm. As a result, the thermosetting resin layer 38 and the mounting portion 62 can be reliably joined, and the packaging materials 15 and 25 can be prevented from being damaged when the peripheral seal portion 21 is formed.

　また、周縁シール部２１の一面に設けられた凹凸は、凹条部２３（第１凹部）と、凹条部２３よりも収納部１６の深さ方向（Ｙ方向）の一方の外側に突出した凸条部２４（第１凸部）とを含む。周縁シール部２１の他面に設けられた凹凸は、凹条部２３（第２凹部）と、凹条部２３よりも収納部１６の深さ方向（Ｙ方向）の他方の外側に突出した凸条部２４（第２凸部）とを含む。そして、凹条部２３（第１凹部及び第２凹部）の底部が丸みを帯びている。このため、周縁シール部２１の熱接着時に鋭利な部材が用いられず、製造過程における外装部材２０の外表面の劣化を抑制することができる。 Further, the unevenness provided on one surface of the peripheral edge sealing portion 21 protrudes to the outside of the concave portion 23 (first concave portion) and the depth direction (Y direction) of the storage portion 16 from the concave portion 23. The ridge portion 24 (first convex portion) is included. The unevenness provided on the other surface of the peripheral edge sealing portion 21 is a convex portion protruding outward from the concave portion 23 (second concave portion) and the other side in the depth direction (Y direction) of the storage portion 16 from the concave portion 23. Includes the strip 24 (second convex portion). The bottom of the concave portion 23 (first concave portion and second concave portion) is rounded. Therefore, a sharp member is not used during thermal bonding of the peripheral seal portion 21, and deterioration of the outer surface of the exterior member 20 during the manufacturing process can be suppressed.

　尚、第２～第１６実施形態の電動自動車１の蓄電デバイス１０に本実施形態と同様の凹条部２３を設けてもよい。 It should be noted that the power storage device 10 of the electric vehicle 1 of the second to sixteenth embodiments may be provided with the same recessed portion 23 as in the present embodiment.

　＜第１８実施形態＞
　次に、図４８は第１８実施形態の電動自動車１の蓄電デバイス１０の正面図を示している。説明の便宜上、前述の図４４～図４６に示す第１７実施形態と同様の部分には同一の符号を付している。本実施形態は第１７実施形態に対して弁装置５０を配した周縁シール部２１の構成が異なっている。その他の部分は第１７実施形態と同様である。 <18th Embodiment>
Next, FIG. 48 shows a front view of the power storage device 10 of the electric vehicle 1 of the 18th embodiment. For convenience of explanation, the same parts as those in the 17th embodiment shown in FIGS. 44 to 46 described above are designated by the same reference numerals. This embodiment is different from the 17th embodiment in the configuration of the peripheral seal portion 21 in which the valve device 50 is arranged. Other parts are the same as those in the 17th embodiment.

　蓄電デバイス１０の周縁シール部２１は弁装置５０が配置されている一辺において、外表面に梨地２２による凹凸が形成されている。梨地２２は外装部材２０のＹ方向の両面に形成されている。梨地２２の表面粗さＲａは例えば１μｍ～２０μｍである。 The peripheral seal portion 21 of the power storage device 10 has irregularities formed on the outer surface by the satin finish 22 on one side where the valve device 50 is arranged. The satin finish 22 is formed on both sides of the exterior member 20 in the Y direction. The surface roughness Ra of the satin finish 22 is, for example, 1 μm to 20 μm.

　図４９は本実施形態の周縁シール部２１を形成するヒートシール装置８０の概略構成図を示している。ヒートシール装置８０のヒートシールヘッド８２の周縁シール部２１と対向する面（挟み面）は粗面加工を施され、梨地８２ｂによる凹凸が形成されている。梨地８２ｂの表面粗さＲａは例えば１μｍ～２０μｍである。 FIG. 49 shows a schematic configuration diagram of the heat sealing device 80 forming the peripheral edge sealing portion 21 of the present embodiment. The surface (sandwiched surface) of the heat-sealing device 80 facing the peripheral edge sealing portion 21 of the heat-sealing head 82 is roughened to form irregularities due to the satin finish 82b. The surface roughness Ra of the satin finish 82b is, for example, 1 μm to 20 μm.

　周縁シール部２１上の包装材１５、２５の取付部６２を挟む部分がヒートシールヘッド８２によって挟まれると、包装材１５、２５が梨地８２ｂによって取付部６２側に押し込まれる。ヒートシールヘッド８２によって押し込まれた位置において包装材１５、２５と取付部６２とが接合される、この時、梨地８２ｂの突出部分が包装材１５、２５を取付部６２側に深く押し込む。これにより、梨地８２ｂの突出部分によって深く押し込まれて形成された梨地２２の凹み部分の位置において、包装材１５、２５と取付部６２とが強固に接合される。 When the portion of the peripheral seal portion 21 that sandwiches the mounting portion 62 of the packaging material 15 and 25 is sandwiched by the heat seal head 82, the packaging material 15 and 25 are pushed toward the mounting portion 62 side by the satin finish 82b. The packaging materials 15 and 25 and the mounting portion 62 are joined at the position pushed by the heat seal head 82. At this time, the protruding portion of the satin finish 82b pushes the packaging materials 15 and 25 deeply toward the mounting portion 62. As a result, the packaging materials 15 and 25 and the mounting portion 62 are firmly joined at the position of the recessed portion of the satin finish 22 formed by being deeply pushed by the protruding portion of the satin finish 82b.

　本実施形態によると、梨地２２による凹凸の凹み部分により、ヒートシールヘッド８２によって必要以上に強い圧力を加えなくても包装材１５、２５の熱接着性樹脂層３８と取付部６２とを強固に接合できる。従って、取付部６２の周囲における密封性の低下を抑制することができ、外装部材２０の密封性を維持することができる。 According to the present embodiment, the concave and convex portions of the satin finish 22 firmly secure the thermosetting resin layers 38 and the mounting portion 62 of the packaging materials 15 and 25 without applying excessively strong pressure by the heat seal head 82. Can be joined. Therefore, it is possible to suppress a decrease in the sealing property around the mounting portion 62, and it is possible to maintain the sealing property of the exterior member 20.

　尚、第２～第１６実施形態の電動自動車１の蓄電デバイス１０に本実施形態と同様の梨地２２を設けてもよい。 Note that the power storage device 10 of the electric vehicle 1 of the second to sixteenth embodiments may be provided with a satin finish 22 similar to that of the present embodiment.

　＜第１９実施形態＞
　次に、図５０は第１９実施形態の電動自動車１の蓄電デバイス１０の周縁シール部２１の取付部６２が挟まれている部分を示す拡大図である。説明の便宜上、前述の図４４～図４６に示す第１７実施形態と同様の部分には同一の符号を付している。本実施形態は第１７実施形態に対して弁装置５０を配した周縁シール部２１の構成が異なっている。その他の部分は第１７実施形態と同様である。 <19th Embodiment>
Next, FIG. 50 is an enlarged view showing a portion in which the attachment portion 62 of the peripheral seal portion 21 of the power storage device 10 of the electric vehicle 1 of the 19th embodiment is sandwiched. For convenience of explanation, the same parts as those in the 17th embodiment shown in FIGS. 44 to 46 described above are designated by the same reference numerals. This embodiment is different from the 17th embodiment in the configuration of the peripheral seal portion 21 in which the valve device 50 is arranged. Other parts are the same as those in the 17th embodiment.

　第１７実施形態と同様に、周縁シール部２１のうち、取付部６２が包装材１５、２５によって挟まれている部分の外表面には、凹条部２３及び凸条部２４によって凹凸が形成されている。 Similar to the 17th embodiment, the outer surface of the peripheral sealing portion 21 in which the mounting portion 62 is sandwiched between the packaging materials 15 and 25 is formed with irregularities by the concave portion 23 and the convex portion 24. ing.

　包装材１５に形成された凹条部２３及び凸条部２４のＺ方向の位置と、包装材２５に形成された凹条部２３及び凸条部２４のＺ方向の位置とが異なる。即ち、包装材１５上の凹条部２３の位置と、包装材２５上の凹条部２３の位置とが、収納部１６（図４５参照）の深さ方向（Ｙ方向）に重ならないように配置される。 The positions of the concave portion 23 and the convex portion 24 formed on the packaging material 15 in the Z direction are different from the positions of the concave portion 23 and the convex portion 24 formed on the packaging material 25 in the Z direction. That is, the position of the concave portion 23 on the packaging material 15 and the position of the concave portion 23 on the packaging material 25 do not overlap with each other in the depth direction (Y direction) of the storage portion 16 (see FIG. 45). Be placed.

　このため、周縁シール部２１の形成時に包装材１５、２５に加えられる力が分散されるため、取付部６２や包装材１５、２５に加えられる部分的なダメージを抑制することができる。 Therefore, since the force applied to the packaging materials 15 and 25 when the peripheral seal portion 21 is formed is dispersed, partial damage applied to the mounting portion 62 and the packaging materials 15 and 25 can be suppressed.

　尚、第２～第１６実施形態の電動自動車１の蓄電デバイス１０に本実施形態と同様の凹条部２３を設けてもよい。 It should be noted that the power storage device 10 of the electric vehicle 1 of the second to sixteenth embodiments may be provided with the same recessed portion 23 as in the present embodiment.

　＜第２０実施形態＞
　次に、図５１、図５２は第２０実施形態の電動自動車１の蓄電デバイス１０の正面図及び側面断面図を示してる。また、図５３は図５１のＫ－Ｋ断面図を示している。説明の便宜上、前述の図１～図１８に示す第１実施形態と同様の部分には同一の符号を付している。本実施形態は第１実施形態に対して弁装置５０の構成が異なっている。その他の部分は第１実施形態と同様である。 <20th Embodiment>
Next, FIGS. 51 and 52 show a front view and a side sectional view of the power storage device 10 of the electric vehicle 1 according to the twentieth embodiment. Further, FIG. 53 shows a cross-sectional view taken along the line KK of FIG. For convenience of explanation, the same parts as those in the first embodiment shown in FIGS. 1 to 18 are designated by the same reference numerals. In this embodiment, the configuration of the valve device 50 is different from that in the first embodiment. Other parts are the same as those in the first embodiment.

　弁装置５０の筐体５１（図５４参照）は弁機能部５２、取付部６２及び平行部７２を有している。平行部７２は取付部６２と弁機能部５２との間に配置され、平行な第１平面Ｑ１及び第２平面Ｑ２（図５５参照）を有している。 The housing 51 (see FIG. 54) of the valve device 50 has a valve function portion 52, a mounting portion 62, and a parallel portion 72. The parallel portion 72 is arranged between the mounting portion 62 and the valve function portion 52, and has a parallel first plane Q1 and a second plane Q2 (see FIG. 55).

　図５４、図５５、図５６は弁装置５０の正面図、底面図及び上面図を示している。また、図５７は図５５のＭ－Ｍ断面図及びＮ－Ｎ断面図を示している。取付部６２は包装材１５、２５に挟まれて周縁シール部２１に固定される。弁機能部５２及び平行部７２は周縁シール部２１の外側に配置され、包装材１５、２５（図５２参照）に挟まれていない。本実施形態では、外装部材２０の内側から外側に向かう方向（Ｚ方向）に取付部６２、弁機能部５２、平行部７２の順に連続して配置される。 54, 55, and 56 show a front view, a bottom view, and a top view of the valve device 50. Further, FIG. 57 shows an MM cross-sectional view and an NN cross-sectional view of FIG. 55. The mounting portion 62 is sandwiched between the packaging materials 15 and 25 and fixed to the peripheral sealing portion 21. The valve function portion 52 and the parallel portion 72 are arranged outside the peripheral edge sealing portion 21 and are not sandwiched between the packaging materials 15 and 25 (see FIG. 52). In the present embodiment, the mounting portion 62, the valve function portion 52, and the parallel portion 72 are continuously arranged in the direction from the inside to the outside (Z direction) of the exterior member 20.

　また、弁機能部５２が周縁シール部２１の外側に配置されるため、取付部６２を熱接着した際の熱によって弁機構の構成部品が変形することによる弁機構の破損を低減することができる。 Further, since the valve function portion 52 is arranged outside the peripheral edge seal portion 21, it is possible to reduce damage to the valve mechanism due to deformation of the component parts of the valve mechanism due to heat generated when the mounting portion 62 is heat-bonded. ..

　取付部６２、弁機能部５２及び平行部７２はそれぞれＺ方向に平行な中心軸Ｃ１を有する筒状であり、互いに同軸である。筐体５１内には中心軸Ｃ１上にＺ方向に延びる通気路６３が設けられる。通気路６３は断面円形に形成され、第１通路部６３ａ、第２通路部６３ｂ及び第３通路部６３ｃを有している。 The mounting portion 62, the valve function portion 52, and the parallel portion 72 each have a tubular shape having a central axis C1 parallel to the Z direction, and are coaxial with each other. A ventilation path 63 extending in the Z direction is provided on the central axis C1 in the housing 51. The ventilation passage 63 is formed with a circular cross section, and has a first passage portion 63a, a second passage portion 63b, and a third passage portion 63c.

　第１通路部６３ａは取付部６２に設けられ、取付部６２の先端（下端）に流入口５１ｄが開口する。第３通路部６３ｃは平行部７２に設けられ、第１通路部６３ａに連続する。第２通路部６３ｂは弁機能部５２に設けられて第３通路部６３ｃに連続し、弁機能部５２の先端（上端）に排気口５１ｂが開口する。即ち、第３通路部６３ｃは、第２通路部６３ｂよりも外装部材２０の内部側に配置され、第３通路部６３ｃよりも更に外装部材２０の内部側に第１通路部６３ａが配置される。 The first passage portion 63a is provided in the mounting portion 62, and the inflow port 51d opens at the tip (lower end) of the mounting portion 62. The third passage portion 63c is provided in the parallel portion 72 and is continuous with the first passage portion 63a. The second passage portion 63b is provided in the valve function portion 52 and is continuous with the third passage portion 63c, and the exhaust port 51b opens at the tip (upper end) of the valve function portion 52. That is, the third passage portion 63c is arranged on the inner side of the exterior member 20 from the second passage portion 63b, and the first passage portion 63a is arranged further on the inner side of the exterior member 20 than the third passage portion 63c. ..

　弁機能部５２の外形は、概ね中心軸Ｃ１を中心とする円柱形状である。平行部７２の外形は、概ね中心軸Ｃ１を中心とする円柱の一部を切り欠いた形状を有する。より具体的には、平行部７２の外形は、概ね中心軸Ｃ１を中心とする円柱を中心軸Ｃ１からＹ方向に一定の距離を空けた平行（略平行である場合を含む）な第１平面Ｑ１及び第２平面Ｑ２で切り欠いた形状を有する。 The outer shape of the valve function portion 52 is generally a cylindrical shape centered on the central axis C1. The outer shape of the parallel portion 72 has a shape in which a part of a cylinder centered on the central axis C1 is cut out. More specifically, the outer shape of the parallel portion 72 is a first plane that is parallel (including the case where it is substantially parallel) with a cylinder centered on the central axis C1 at a certain distance in the Y direction from the central axis C1. It has a shape notched in Q1 and the second plane Q2.

　第１平面Ｑ１及び第２平面Ｑ２は中心軸Ｃ１に平行（略平行な場合を含む）である。また、本実施形態では第１平面Ｑ１及び第２平面Ｑ２は周縁シール部２１が延びる方向に平行（略平行な場合を含む）である。 The first plane Q1 and the second plane Q2 are parallel to the central axis C1 (including the case where they are substantially parallel). Further, in the present embodiment, the first plane Q1 and the second plane Q2 are parallel (including the case where they are substantially parallel) in the direction in which the peripheral edge sealing portion 21 extends.

　また、平行部７２の外周面は第１平面Ｑ１及び第２平面Ｑ２の両端をそれぞれ連結する湾曲面Ｑ３及び湾曲面Ｑ４を有している。湾曲面Ｑ３、Ｑ４は中心軸Ｃ１に垂直な断面上で中心軸Ｃ１を中心とする円弧状であり、弁機能部５２の外形にＺ方向に重なる。平行部７２は一対の第１平面Ｑ１及び第２平面Ｑ２が形成されるように円筒形の部材の外周面を切削することにより形成することができる。 Further, the outer peripheral surface of the parallel portion 72 has a curved surface Q3 and a curved surface Q4 that connect both ends of the first plane Q1 and the second plane Q2, respectively. The curved surfaces Q3 and Q4 have an arc shape centered on the central axis C1 on a cross section perpendicular to the central axis C1, and overlap the outer shape of the valve function portion 52 in the Z direction. The parallel portion 72 can be formed by cutting the outer peripheral surface of the cylindrical member so that a pair of the first plane Q1 and the second plane Q2 are formed.

　取付部６２の外形は中心軸Ｃ１に垂直な断面形状が非円形である。より具体的には、取付部６２は中心軸Ｃ１に垂直な断面においてＸ方向の中央部から一方（第１方向）に向かうほど薄く形成された第１翼状部６８と、他方（第２方向）に向かうほど薄く形成された第２翼状部６９とを有する。これにより、取付部６２は蓄電デバイス１０の長手方向（Ｘ方向）の中央部に近づくほど厚くなり、端部に近づくほど薄くなる。 The outer shape of the mounting portion 62 has a non-circular cross-sectional shape perpendicular to the central axis C1. More specifically, the mounting portion 62 has a first wing-shaped portion 68 formed thinner toward one (first direction) from the central portion in the X direction in a cross section perpendicular to the central axis C1, and the other (second direction). It has a second wing-shaped portion 69 formed thinner toward the direction of. As a result, the mounting portion 62 becomes thicker as it approaches the central portion in the longitudinal direction (X direction) of the power storage device 10, and becomes thinner as it approaches the end portion.

　本実施形態では第１翼状部６８及び第２翼状部６９により、取付部６２の外周面は包装材１５、２５に覆われるそれぞれの面において滑らかな湾曲面を描いている。このため、取付部６２が円筒形の場合と比べて周縁シール部２１の取付部６２を挟まない部分から挟む部分への厚みの変化が滑らかになる。その結果、取付部６２周辺の周縁シール部２１において包装材１５、２５に無理な力が加わらないため、取付部６２を周縁シール部２１に強固に固定することができる。 In the present embodiment, the first wing-shaped portion 68 and the second wing-shaped portion 69 form a smooth curved surface on each surface of the mounting portion 62 covered with the packaging materials 15 and 25. Therefore, as compared with the case where the mounting portion 62 is cylindrical, the change in thickness of the peripheral seal portion 21 from the portion not sandwiching the mounting portion 62 to the portion sandwiching the mounting portion 62 becomes smoother. As a result, since no excessive force is applied to the packaging materials 15 and 25 at the peripheral seal portion 21 around the attachment portion 62, the attachment portion 62 can be firmly fixed to the peripheral seal portion 21.

　また、弁装置５０をＺ方向に視たとき、取付部６２の外形は弁機能部５２及び平行部７２の外形に包含される。言い換えると、弁装置５０をＺ方向に視たとき、弁機能部５２及び平行部７２は取付部６２の外形から、収納部１６（図５参照）の深さ方向を含む各方向にはみ出している。その結果、平行部７２と取付部６２との境界には段差５１ｃが形成されている。この段差５１ｃにより、弁装置５０は取付部６２から平行部７２に向かって不連続に拡径する形状となる。 Further, when the valve device 50 is viewed in the Z direction, the outer shape of the mounting portion 62 is included in the outer shape of the valve function portion 52 and the parallel portion 72. In other words, when the valve device 50 is viewed in the Z direction, the valve function portion 52 and the parallel portion 72 protrude from the outer shape of the mounting portion 62 in each direction including the depth direction of the storage portion 16 (see FIG. 5). .. As a result, a step 51c is formed at the boundary between the parallel portion 72 and the mounting portion 62. Due to this step 51c, the valve device 50 has a shape in which the diameter is discontinuously expanded from the mounting portion 62 toward the parallel portion 72.

　以上のとおり、本実施形態では取付部６２、弁機能部５２及び平行部７２の外形はそれぞれに割り当てられている役割に応じて中心軸Ｃ１に垂直な断面形状が異なる。 As described above, in the present embodiment, the outer shapes of the mounting portion 62, the valve function portion 52, and the parallel portion 72 have different cross-sectional shapes perpendicular to the central axis C1 depending on the roles assigned to each.

　弁機能部５２の内部に設けられる弁機構は外装部材２０の内部において発生したガスに起因して外装部材２０内の圧力が上昇した際に第２通路部６３ｂを開く。そして、第１通路部６３ａ及び第３通路部６３ｃを通過したガスを第２通路部６３ｂに導き、排気口５１ｂを介して外装部材２０の外部へ排気する。 The valve mechanism provided inside the valve function portion 52 opens the second passage portion 63b when the pressure inside the exterior member 20 rises due to the gas generated inside the exterior member 20. Then, the gas that has passed through the first passage portion 63a and the third passage portion 63c is guided to the second passage portion 63b and exhausted to the outside of the exterior member 20 through the exhaust port 51b.

　即ち、弁機能部５２には、弁装置５０のガス抜き弁としての機能を発揮するための主な構造を有する部分が保持される。本実施形態では、弁機構は弁機能部５２の内部の第２通路部６３ｂ内に設けられ、バネ５６、ボール５４及びバルブシート５５を備えている。 That is, the valve function portion 52 holds a portion having a main structure for exerting the function of the valve device 50 as a gas vent valve. In the present embodiment, the valve mechanism is provided in the second passage portion 63b inside the valve function portion 52, and includes a spring 56, a ball 54, and a valve seat 55.

　また、筐体５１の弁機能部５２は、下面に嵌合孔５９ａを有した筒部５９と、嵌合孔５９ａに挿入される挿入部７０とを有している。挿入部７０は平行部７２及び取付部６２と一体に形成される。 Further, the valve function portion 52 of the housing 51 has a tubular portion 59 having a fitting hole 59a on the lower surface and an insertion portion 70 to be inserted into the fitting hole 59a. The insertion portion 70 is formed integrally with the parallel portion 72 and the mounting portion 62.

　弁機能部５２内には流入口５１ｄから排気口５１ｂに向かって順に、挿入部７０、バルブシート５５、ボール５４、バネ５６が配置されている。本実施形態では、筒部５９、バルブシート５５及び挿入部７０が別部材として構成されているが、これらの少なくとも一部を一体に形成してもよい。また、挿入部７０が平行部７２及び取付部６２と一体に形成されているが、これらの少なくとも一部を別部材として形成してもよい。 The insertion portion 70, the valve seat 55, the ball 54, and the spring 56 are arranged in this order from the inflow port 51d toward the exhaust port 51b in the valve function portion 52. In the present embodiment, the tubular portion 59, the valve seat 55, and the insertion portion 70 are configured as separate members, but at least a part of them may be integrally formed. Further, although the insertion portion 70 is integrally formed with the parallel portion 72 and the mounting portion 62, at least a part of these may be formed as a separate member.

　バネ５６はコイルバネにより形成され、ボール５４を下方に付勢する。バネ５６を板バネにより形成してもよい。バルブシート５５はバネ５６により外側から付勢される弁体としてのボール５４を支持する。ボール５４がバルブシート５５上に着座すると、弁装置５０の閉状態が形成される。これにより、弁機構はボールスプリング型の逆止弁を構成する。 The spring 56 is formed by a coil spring and urges the ball 54 downward. The spring 56 may be formed by a leaf spring. The valve seat 55 supports the ball 54 as a valve body urged from the outside by the spring 56. When the ball 54 sits on the valve seat 55, a closed state of the valve device 50 is formed. As a result, the valve mechanism constitutes a ball spring type check valve.

　取付部６２は外装部材２０の内部において発生したガスが第１通路部６３ａに流入するように、周縁シール部２１に固定される。即ち、取付部６２の内部の第１通路部６３ａは、外装部材２０の内部の収納部１６（図６参照）に連通している。 The mounting portion 62 is fixed to the peripheral edge sealing portion 21 so that the gas generated inside the exterior member 20 flows into the first passage portion 63a. That is, the first passage portion 63a inside the mounting portion 62 communicates with the storage portion 16 (see FIG. 6) inside the exterior member 20.

　外装部材２０内が所定の圧力に達すると、外装部材２０に連通する第１通路部６３ａ及び第３通路部６３ｃを通過したガスがボール５４を上方に押圧する。ガスにより押圧されたボール５４はバネ５６に抗して排気口５１ｂ側へ移動するとバルブシート５５から離れ、弁装置５０の開状態が形成される。この開状態においてガスはボール５４とバルブシート５５との間に形成された隙間を通り、排気口５１ｂから外部空間に排出される。 When the inside of the exterior member 20 reaches a predetermined pressure, the gas passing through the first passage portion 63a and the third passage portion 63c communicating with the exterior member 20 presses the ball 54 upward. When the ball 54 pressed by the gas moves toward the exhaust port 51b against the spring 56, it separates from the valve seat 55 and the valve device 50 is opened. In this open state, the gas passes through the gap formed between the ball 54 and the valve seat 55 and is discharged to the external space from the exhaust port 51b.

　ガスが排出され、ボール５４をＺ方向に押圧する力が弱まると、バネ５６が延び、ボール５４をＺ方向（下方）に付勢する力がガスによる力よりも大きくなる。その結果、再度、弁装置５０の閉状態が形成される。 When the gas is discharged and the force for pressing the ball 54 in the Z direction weakens, the spring 56 extends and the force for urging the ball 54 in the Z direction (downward) becomes larger than the force due to the gas. As a result, the closed state of the valve device 50 is formed again.

　弁装置５０は閉状態において、外装部材２０の内部への大気の進入を防止することができる。一方、開状態においては、外装部材２０内の圧力が外部空間内の圧力よりも高いまたは同等の状態が維持される。このため、開状態においても、外装部材２０の内部への大気の進入は生じ難い。これにより、弁装置５０は外装部材２０内への大気の進入を効果的に防止し、大気に含まれる水分等による蓄電素子１１の劣化を防止することができる。 The valve device 50 can prevent the ingress of air into the exterior member 20 in the closed state. On the other hand, in the open state, the pressure inside the exterior member 20 is maintained higher than or equivalent to the pressure inside the external space. Therefore, even in the open state, it is difficult for the atmosphere to enter the inside of the exterior member 20. As a result, the valve device 50 can effectively prevent the entry of the atmosphere into the exterior member 20, and can prevent the power storage element 11 from being deteriorated by moisture contained in the atmosphere.

　弁装置５０の各部を構成する材料は、特に限定されない。取付部６２、弁機能部５２及び平行部７２を同じ材料で形成してもよく、異なる材料で形成してもよい。例えば、取付部６２、弁機能部５２の筒部５９、挿入部７０及び平行部７２を、アルミニウム合金、ステンレス、鋼、チタン等の金属製とすることができる。 The material constituting each part of the valve device 50 is not particularly limited. The mounting portion 62, the valve function portion 52, and the parallel portion 72 may be formed of the same material or may be formed of different materials. For example, the mounting portion 62, the tubular portion 59 of the valve function portion 52, the insertion portion 70, and the parallel portion 72 can be made of a metal such as an aluminum alloy, stainless steel, steel, or titanium.

　取付部６２、弁機能部５２の筒部５９、挿入部７０及び平行部７２を樹脂により形成してもよい。この時、上記したように、取付部６２は、包装材１５、２５の最内層と直に接着する材料が好ましい。また、弁機能部５２の筒部５９の材質の融点を取付部６２の材質の融点よりも高くするとよい。 The mounting portion 62, the tubular portion 59 of the valve function portion 52, the insertion portion 70, and the parallel portion 72 may be formed of resin. At this time, as described above, the mounting portion 62 is preferably made of a material that directly adheres to the innermost layers of the packaging materials 15 and 25. Further, the melting point of the material of the cylinder portion 59 of the valve function portion 52 may be higher than the melting point of the material of the mounting portion 62.

　弁機能部５２内部に設けられる弁機構の材質の好ましい例として、ボール５４をフッ素樹脂製とし、バルブシート５５をフッ素ゴム製とすることができる。また、バネ５６をステンレス等の金属製とし、弁機能部５２の筒部５９を金属製とすることができる。 As a preferable example of the material of the valve mechanism provided inside the valve function portion 52, the ball 54 may be made of fluororesin and the valve seat 55 may be made of fluororubber. Further, the spring 56 can be made of metal such as stainless steel, and the tubular portion 59 of the valve function portion 52 can be made of metal.

　バルブシート５５と挿入部７０とは接着剤により接着することができ、この接着剤は特に限定されない。例えば、バルブシート５５をフッ素ゴム製として挿入部７０をアルミニウム等の金属製とした場合、酸変性ポリオレフィン及びエポキシ樹脂から成る接着剤を好適に用いることができる。 The valve seat 55 and the insertion portion 70 can be adhered with an adhesive, and this adhesive is not particularly limited. For example, when the valve seat 55 is made of fluororubber and the insertion portion 70 is made of a metal such as aluminum, an adhesive made of acid-modified polyolefin and epoxy resin can be preferably used.

　このような接着剤は、例えば変性シリコン樹脂製の接着剤が使用される場合に比べて、電解液による接着性能の劣化を抑制することができる点で優れる。また、弁装置５０の開封防止の観点から、その他の様々な箇所にも適宜接着剤を塗布することができる。例えば、弁機能部５２の筒部５９の下端面と平行部７２の上面との間に接着剤を塗布することができる。 Such an adhesive is superior in that it can suppress deterioration of the adhesive performance due to the electrolytic solution, as compared with the case where, for example, an adhesive made of a modified silicone resin is used. Further, from the viewpoint of preventing the valve device 50 from opening, the adhesive can be appropriately applied to various other places. For example, an adhesive can be applied between the lower end surface of the tubular portion 59 of the valve function portion 52 and the upper surface of the parallel portion 72.

　また、取付部６２の表面には、特に耐電解液性の観点から、腐食防止剤のコーティングを施して腐食防止被膜層を形成することが好ましい。特に取付部６２をアルミニウム等の金属製とした場合に耐電解液性効果が大きいが、その他の材料から構成する場合にも耐電解液性を向上できる。 Further, it is preferable that the surface of the mounting portion 62 is coated with a corrosion inhibitor to form a corrosion preventive coating layer, particularly from the viewpoint of electrolytic solution resistance. In particular, when the mounting portion 62 is made of a metal such as aluminum, the electrolytic solution resistance effect is large, but when it is made of other materials, the electrolytic solution resistance can be improved.

　このようなコーティングは、取付部６２を腐食防止剤の液体中に浸漬することにより施すことができる。これにより、取付部６２の外側表面及び第１通路部６３ａに面する内側表面に腐食防止被膜層を形成することができる。このため、外装部材２０内のガスによる外側表面の腐食及び第１通路部６３ａを通るガスによる内側表面の腐食を防止することができる。腐食防止剤の材料は特に限定されないが、耐酸性のものが好ましくリン酸クロメート処理等により形成することができる。 Such a coating can be applied by immersing the mounting portion 62 in a liquid of a corrosion inhibitor. As a result, the corrosion prevention coating layer can be formed on the outer surface of the mounting portion 62 and the inner surface facing the first passage portion 63a. Therefore, it is possible to prevent the corrosion of the outer surface by the gas in the exterior member 20 and the corrosion of the inner surface by the gas passing through the first passage portion 63a. The material of the corrosion inhibitor is not particularly limited, but an acid-resistant material is preferable and can be formed by phosphoric acid chromate treatment or the like.

　また、取付部６２だけでなく、平行部７２、弁機能部５２の筒部５９及び挿入部７０の表面にも、同様のコーティングを施して腐食防止被膜層を形成してもよい。電解液による取付部６２と包装材１５、２５との接着性能の劣化を抑制する観点からは、このようなコーティングは特に取付部６２に施すことが有効である。 Further, not only the mounting portion 62 but also the surfaces of the parallel portion 72, the tubular portion 59 of the valve function portion 52, and the insertion portion 70 may be similarly coated to form a corrosion prevention coating layer. From the viewpoint of suppressing deterioration of the adhesive performance between the mounting portion 62 and the packaging materials 15 and 25 due to the electrolytic solution, it is particularly effective to apply such a coating to the mounting portion 62.

　図５９～図６１はヒートシール工程の弁装置５０の取り付け時の状態を説明する図である。これらの図において、包装材１５の収納部１６を省略している。図５９に示すように、包装材１５、２５は固定具（不図示）によって対面した状態に固定される。弁装置５０は治具９１の把持部９２により把持される。この時、把持部９２は弁装置５０の平行部７２の第１平面Ｑ１及び第２平面Ｑ２を挟持する。平行な第１平面Ｑ１及び第２平面Ｑ２によって把持部９２は第１平面Ｑ１及び第２平面Ｑ２の全面に容易に接触し、平行部７２を確実に挟み込むことができる。 FIGS. 59 to 61 are diagrams illustrating a state when the valve device 50 in the heat sealing process is attached. In these figures, the storage portion 16 of the packaging material 15 is omitted. As shown in FIG. 59, the packaging materials 15 and 25 are fixed in a facing state by a fixture (not shown). The valve device 50 is gripped by the grip portion 92 of the jig 91. At this time, the grip portion 92 sandwiches the first plane Q1 and the second plane Q2 of the parallel portion 72 of the valve device 50. The parallel first plane Q1 and the second plane Q2 allow the grip portion 92 to easily come into contact with the entire surfaces of the first plane Q1 and the second plane Q2, and the parallel portion 72 can be reliably sandwiched.

　次に、治具９１によって弁装置５０が搬送され、図６０に示すように互いに対面する包装材１５、２５間に弁装置５０の取付部６２が進入して設置される。この時、弁装置５０は平行部７２が包装材１５、２５の隙間に入り込まないように搬送される。これにより、弁装置５０の筐体５１の取付部６２が包装材１５、２５の外周部に挟まれる。この時、弁装置５０を配した辺の周縁シール部２１が延びる方向（Ｘ方向）が第１平面Ｑ１及び第２平面Ｑ２とが平行になるように弁装置５０が設置される。 Next, the valve device 50 is conveyed by the jig 91, and as shown in FIG. 60, the mounting portion 62 of the valve device 50 is inserted between the packaging materials 15 and 25 facing each other and installed. At this time, the valve device 50 is conveyed so that the parallel portion 72 does not enter the gap between the packaging materials 15 and 25. As a result, the mounting portion 62 of the housing 51 of the valve device 50 is sandwiched between the outer peripheral portions of the packaging materials 15 and 25. At this time, the valve device 50 is installed so that the direction (X direction) in which the peripheral edge sealing portion 21 of the side on which the valve device 50 is arranged extends is parallel to the first plane Q1 and the second plane Q2.

　次に、図６１に示すように、一対の加熱されたヒートシールバー９３が包装材１５、２５の外周部分を外側から挟み込む。その結果、包装材１５、２５の外周部分がヒートシールバー９３からの熱を受けて熱接着され、周縁シール部２１が形成される。 Next, as shown in FIG. 61, a pair of heated heat seal bars 93 sandwich the outer peripheral portions of the packaging materials 15 and 25 from the outside. As a result, the outer peripheral portions of the packaging materials 15 and 25 receive heat from the heat seal bar 93 and are heat-bonded to form the peripheral seal portion 21.

　以上により、弁装置５０の取付部６２のみが包装材１５、２５に挟み込まれるようにして、弁装置５０が周縁シール部２１に固定される。この時、取付部６２に含まれる第１、第２翼状部６８、６９（図５５参照）は、両者の先鋭な端部を結ぶ線が周縁シール部２１の延びる方向（Ｘ方向）に対して傾くことなく固定される。その後、一対のヒートシールバー９３が所定の位置に退避するとともに、把持部９２が弁装置５０を解放し、所定の位置に退避する。 As described above, the valve device 50 is fixed to the peripheral seal portion 21 so that only the mounting portion 62 of the valve device 50 is sandwiched between the packaging materials 15 and 25. At this time, in the first and second wing-shaped portions 68 and 69 (see FIG. 55) included in the mounting portion 62, the line connecting the sharp ends of both is relative to the extending direction (X direction) of the peripheral seal portion 21. It is fixed without tilting. After that, the pair of heat seal bars 93 retract to a predetermined position, and the grip portion 92 releases the valve device 50 and retracts to a predetermined position.

　以上の工程では、把持部９２は一対の平行な第１平面Ｑ１及び第２平面Ｑ２により、弁装置５０をしっかりと把持することができる。このため、包装材１５、２５に対して弁装置５０を所望の位置まで正確に搬送することができる。また、ヒートシール加工中に包装材１５、２５に対して弁装置５０を所望の位置にしっかりと固定することができる。即ち、弁装置５０を外装部材２０に対して正確に位置合わせすることができる。ここでいう位置合わせには、Ｘ方向、Ｙ方向及びＺ方向の位置だけでなく、中心軸Ｃ１周りの角度を調整することが含まれる。従って、弁装置５０の外装部材２０への取り付けを容易にすることができる。 In the above steps, the grip portion 92 can firmly grip the valve device 50 by the pair of parallel first plane Q1 and second plane Q2. Therefore, the valve device 50 can be accurately conveyed to the desired position with respect to the packaging materials 15 and 25. Further, the valve device 50 can be firmly fixed to the packaging materials 15 and 25 at a desired position during the heat sealing process. That is, the valve device 50 can be accurately aligned with the exterior member 20. The alignment referred to here includes adjusting not only the positions in the X direction, the Y direction, and the Z direction, but also the angle around the central axis C1. Therefore, the valve device 50 can be easily attached to the exterior member 20.

　本実施形態によると、弁装置５０の筐体５１の外周面上には外装部材２０の外側に配される平行な第１、第２平面Ｑ１、Ｑ２が設けられる。このため、ヒートシール工程で弁装置５０を容易に把持して搬送や位置決めを行うことができる。従って、弁装置５０を外装部材２０に容易に取り付けることができる。 According to the present embodiment, parallel first and second planes Q1 and Q2 arranged outside the exterior member 20 are provided on the outer peripheral surface of the housing 51 of the valve device 50. Therefore, the valve device 50 can be easily gripped and transported and positioned in the heat sealing process. Therefore, the valve device 50 can be easily attached to the exterior member 20.

　また、筐体５１は、第１平面Ｑ１及び第２平面Ｑ２を設けた平行部７２が取付部６２と弁機能部５２との間に配置される。これにより、第１平面Ｑ１及び第２平面Ｑ２を把持部９２により把持して包装材１５、２５の外側に配し、弁装置５０を容易に設置できるとともに、把持する際の加圧力による弁機構の損傷を防止することができる。 Further, in the housing 51, a parallel portion 72 provided with the first plane Q1 and the second plane Q2 is arranged between the mounting portion 62 and the valve function portion 52. As a result, the first plane Q1 and the second plane Q2 are gripped by the gripping portion 92 and arranged on the outside of the packaging materials 15 and 25, so that the valve device 50 can be easily installed and the valve mechanism by the pressing force at the time of gripping. Damage can be prevented.

　また、取付部６２の軸方向に垂直な断面形状が非円形であるので、通気路６３を形成する取付部６２内の第１通路部６３ａの断面積を確保してＹ方向の取付部６２の厚みを小さくできる。従って、外装部材２０に取付部６２を強固に固定することができる。 Further, since the cross-sectional shape perpendicular to the axial direction of the mounting portion 62 is non-circular, the cross-sectional area of the first passage portion 63a in the mounting portion 62 forming the ventilation path 63 is secured, and the mounting portion 62 in the Y direction The thickness can be reduced. Therefore, the mounting portion 62 can be firmly fixed to the exterior member 20.

　また、取付部６２が中央部から周縁シール部２１に沿ったＸ方向の一方（第１方向）に向かうほど薄く形成された第１翼状部６８と、Ｘ方向の他方（第１方向と反対の第２方向）に向かうほど薄く形成された第２翼状部６９とを有する。これにより、取付部６２の外周面は包装材１５、２５に覆われるそれぞれの面において滑らかな湾曲面を描いている。このため、周縁シール部２１の取付部６２を挟まない部分から挟む部分への厚みの変化が滑らかになる。従って、外装部材２０に取付部６２をより強固に固定することができる。 Further, the first wing-shaped portion 68 formed so that the mounting portion 62 becomes thinner toward one side (first direction) in the X direction along the peripheral edge seal portion 21 from the central portion, and the other portion in the X direction (opposite to the first direction). It has a second wing-shaped portion 69 formed thinner toward the second direction). As a result, the outer peripheral surface of the mounting portion 62 draws a smooth curved surface on each surface covered with the packaging materials 15 and 25. Therefore, the change in thickness of the peripheral seal portion 21 from the portion that does not sandwich the mounting portion 62 to the portion that sandwiches the mounting portion 62 becomes smooth. Therefore, the mounting portion 62 can be more firmly fixed to the exterior member 20.

　また、第１平面Ｑ１及び第２平面Ｑ２がＸ方向（第１方向及び第２方向）に平行であるので、把持部９２を容易に移動させることができ、弁装置５０の取り付け時の作業性をよくすることができる。 Further, since the first plane Q1 and the second plane Q2 are parallel to the X direction (first direction and second direction), the grip portion 92 can be easily moved, and the workability at the time of mounting the valve device 50 can be easily moved. Can be improved.

　尚、第２～第１９実施形態の電動自動車１の蓄電デバイス１０の弁装置５０に本実施形態と同様の第１、第２平面Ｑ１、Ｑ２を設けてもよい。 Note that the valve device 50 of the power storage device 10 of the electric vehicle 1 of the second to nineteenth embodiments may be provided with the same first and second planes Q1 and Q2 as those of the present embodiment.

　＜第２１実施形態＞
　次に、図６２は第２１実施形態の電動自動車１の蓄電デバイス１０の弁装置５０の側面断面図を示している。説明の便宜上、前述の図５１～図６１に示す第２０実施形態と同様の部分には同一の符号を付している。第２０実施形態の弁装置５０はガス抜きを繰り返し可能なボールスプリング型の逆止弁であったが、本実施形態の弁装置５０は１回限りのガス抜きが可能破壊弁を構成する。その他の部分は第２０実施形態と同様である。 <21st Embodiment>
Next, FIG. 62 shows a side sectional view of the valve device 50 of the power storage device 10 of the electric vehicle 1 of the 21st embodiment. For convenience of explanation, the same parts as those in the 20th embodiment shown in FIGS. 51 to 61 are designated by the same reference numerals. The valve device 50 of the 20th embodiment is a ball spring type check valve capable of repeatedly degassing, but the valve device 50 of the present embodiment constitutes a destructive valve capable of degassing only once. Other parts are the same as those in the 20th embodiment.

　弁装置５０は通気路６３を閉塞する薄板またはフィルムから成る破壊弁５７を備えている。破壊弁５７は例えば、排気口５１ｂを覆うように筐体５１に樹脂製の薄板またはラミネートフィルムを熱接着して形成される。 The valve device 50 includes a breaking valve 57 made of a thin plate or a film that closes the air passage 63. The break valve 57 is formed, for example, by heat-bonding a thin resin plate or a laminated film to the housing 51 so as to cover the exhaust port 51b.

　外装部材２０の内部の圧力が上昇すると、通気路６３を流通するガスが破壊弁５７を押圧する。これにより、破壊弁５７である薄板またはラミネートフィルムが筐体５１から剥離することにより開弁する。 When the pressure inside the exterior member 20 rises, the gas flowing through the ventilation passage 63 presses the break valve 57. As a result, the thin plate or laminated film, which is the breaking valve 57, is peeled off from the housing 51 to open the valve.

　本実施形態において、破壊弁５７をアルミニウム等の金属製の薄板により形成して筐体５１に接着してもよい。この時、図６３に示すように、破壊弁５７には中心付近から放射状に延びる溝部５７ａを形成するとより好ましい。溝部５７ａは破壊弁５７を厚み方向に貫通しておらず、破壊弁５７は他の部位に比べて溝部５７ａ上で薄く形成されている。この場合、外装部材２０内の圧力が上昇すると、破壊弁５７が破断することによって開弁する。 In the present embodiment, the breaking valve 57 may be formed of a thin metal plate such as aluminum and adhered to the housing 51. At this time, as shown in FIG. 63, it is more preferable to form the groove portion 57a radially extending from the vicinity of the center in the fracture valve 57. The groove portion 57a does not penetrate the breaking valve 57 in the thickness direction, and the breaking valve 57 is formed thinner on the groove portion 57a than other portions. In this case, when the pressure inside the exterior member 20 rises, the break valve 57 breaks and opens.

　尚、弁装置５０は、ポペット型、ダックビル型、アンブレラ型、ダイヤフラム型等であってもよい。また、弁装置５０は逆止弁及び破壊弁のいずれかであってもよく、逆止弁及び破壊弁の両方を含んでいてもよい。 The valve device 50 may be a poppet type, a duck building type, an umbrella type, a diaphragm type, or the like. Further, the valve device 50 may be either a check valve or a break valve, and may include both a check valve and a break valve.

　＜第２２実施形態＞
　次に、図６４は第２２実施形態の電動自動車１の蓄電デバイス１０の弁装置５０の底面図示している。説明の便宜上、前述の図５１～図６１に示す第２０実施形態と同様の部分には同一の符号を付している。本実施形態は第２０実施形態に対して弁装置５０の平行部７２の向きが異なっている。その他の部分は第２０実施形態と同様である。 <22nd Embodiment>
Next, FIG. 64 shows a bottom view of the valve device 50 of the power storage device 10 of the electric vehicle 1 of the 22nd embodiment. For convenience of explanation, the same parts as those in the 20th embodiment shown in FIGS. 51 to 61 are designated by the same reference numerals. In this embodiment, the orientation of the parallel portion 72 of the valve device 50 is different from that of the 20th embodiment. Other parts are the same as those in the 20th embodiment.

　弁装置５０の筐体５１は第２０実施形態と同様に外装部材２０の内側から外側に向かって取付部６２、平行部７２、弁機能部５２の順に配される。取付部６２は外装部材２０に取り付けられ、弁機能部５２は内部に弁機構を設けられる。平行部７２の第１平面Ｑ１及び第２平面Ｑ２は、周縁シール部２１が延びる方向（Ｘ方向）に垂直（略垂直の場合を含む）に配される。湾曲面Ｑ３、Ｑ４は第１、第２平面Ｑ１、Ｑ２の両端をそれぞれ連結し、弁機能部５２の外形にＺ方向に重なる。 The housing 51 of the valve device 50 is arranged in the order of the mounting portion 62, the parallel portion 72, and the valve function portion 52 from the inside to the outside of the exterior member 20 as in the twentieth embodiment. The attachment portion 62 is attached to the exterior member 20, and the valve function portion 52 is provided with a valve mechanism inside. The first plane Q1 and the second plane Q2 of the parallel portion 72 are arranged perpendicular to the direction (X direction) in which the peripheral edge seal portion 21 extends (including the case where it is substantially vertical). The curved surfaces Q3 and Q4 connect both ends of the first and second planes Q1 and Q2, respectively, and overlap the outer shape of the valve function portion 52 in the Z direction.

　本実施形態によると、第１平面Ｑ１及び第２平面Ｑ２が外装部材２０の外側に配され、Ｘ方向（第１方向及び第２方向）に垂直である。このため、把持部９２を容易に移動させることができ、弁装置５０の取り付け時の作業性をよくすることができる。 According to the present embodiment, the first plane Q1 and the second plane Q2 are arranged outside the exterior member 20 and are perpendicular to the X direction (first direction and second direction). Therefore, the grip portion 92 can be easily moved, and the workability at the time of attaching the valve device 50 can be improved.

　尚、第１平面Ｑ１及び第２平面Ｑ２はＸ方向に平行または垂直に限られず、弁装置５０の取り付け時の作業性が低下するが、様々な方向に向けて配することができる。 The first plane Q1 and the second plane Q2 are not limited to parallel or vertical in the X direction, and the workability at the time of mounting the valve device 50 is reduced, but they can be arranged in various directions.

　尚、第２～第１９実施形態の電動自動車１の蓄電デバイス１０の弁装置５０に本実施形態と同様の第１、第２平面Ｑ１、Ｑ２を設けてもよい。 Note that the valve device 50 of the power storage device 10 of the electric vehicle 1 of the second to nineteenth embodiments may be provided with the same first and second planes Q1 and Q2 as those of the present embodiment.

　＜第２３実施形態＞
　次に、図６５は第２３実施形態の電動自動車１の蓄電デバイス１０の弁装置５０の正面図を示している。説明の便宜上、前述の図５１～図６１に示す第２０実施形態と同様の部分には同一の符号を付している。本実施形態は第２０実施形態に対して弁装置５０の構成が異なっている。その他の部分は第２０実施形態と同様である。 <23rd Embodiment>
Next, FIG. 65 shows a front view of the valve device 50 of the power storage device 10 of the electric vehicle 1 of the 23rd embodiment. For convenience of explanation, the same parts as those in the 20th embodiment shown in FIGS. 51 to 61 are designated by the same reference numerals. In this embodiment, the configuration of the valve device 50 is different from that in the 20th embodiment. Other parts are the same as those in the 20th embodiment.

　弁装置５０の筐体５１は外装部材２０の内側から外側に向かって取付部６２、弁機能部５２、平行部７２の順に配される。取付部６２は外装部材２０に取り付けられる。弁機能部５２は内部に弁機構を設けられる。平行部７２はＸ方向に平行な第１平面Ｑ１及び第２平面Ｑ２を設けられる。 The housing 51 of the valve device 50 is arranged in the order of the mounting portion 62, the valve function portion 52, and the parallel portion 72 from the inside to the outside of the exterior member 20. The mounting portion 62 is mounted on the exterior member 20. The valve function portion 52 is provided with a valve mechanism inside. The parallel portion 72 is provided with a first plane Q1 and a second plane Q2 parallel to the X direction.

　本実施形態によると、弁機構を有した弁機能部５２の外側に、第１、第２平面Ｑ１、Ｑ２を有した平行部７２が配置される。これにより、第１平面Ｑ１及び第２平面Ｑ２を把持部９２により把持して包装材１５、２５の外側に配し、弁装置５０を容易に設置できるとともに、把持する際の加圧力による弁機構の損傷を防止することができる。 According to this embodiment, a parallel portion 72 having the first and second planes Q1 and Q2 is arranged outside the valve function portion 52 having the valve mechanism. As a result, the first plane Q1 and the second plane Q2 are gripped by the gripping portion 92 and arranged on the outside of the packaging materials 15 and 25, so that the valve device 50 can be easily installed and the valve mechanism by the pressing force at the time of gripping. Damage can be prevented.

　尚、第２２実施形態と同様に、平行部７２の第１平面Ｑ１及び第２平面Ｑ２を、周縁シール部２１が延びる方向（Ｘ方向）に垂直に配してもよい。 Note that, as in the 22nd embodiment, the first plane Q1 and the second plane Q2 of the parallel portion 72 may be arranged perpendicularly to the direction (X direction) in which the peripheral edge seal portion 21 extends.

　また、第２～第１９実施形態の電動自動車１の蓄電デバイス１０の弁装置５０に本実施形態と同様の第１、第２平面Ｑ１、Ｑ２を設けてもよい。 Further, the valve device 50 of the power storage device 10 of the electric vehicle 1 of the second to nineteenth embodiments may be provided with the same first and second planes Q1 and Q2 as those of the present embodiment.

　＜第２４～第２５実施形態＞
　次に、図６６、図６７は第２４実施形態及び第２５実施形態の電動自動車１の蓄電デバイス１０の弁装置５０の底面図を示している。説明の便宜上、前述の図５１～図６１に示す第２０実施形態と同様の部分には同一の符号を付している。これらの実施形態は第２０実施形態に対して弁装置５０の取付部６２の形状が異なっている。その他の部分は第２０実施形態と同様である。 <24th to 25th embodiments>
Next, FIGS. 66 and 67 show bottom views of the valve device 50 of the power storage device 10 of the electric vehicle 1 of the 24th and 25th embodiments. For convenience of explanation, the same parts as those in the 20th embodiment shown in FIGS. 51 to 61 are designated by the same reference numerals. In these embodiments, the shape of the attachment portion 62 of the valve device 50 is different from that in the 20th embodiment. Other parts are the same as those in the 20th embodiment.

　図６６に示す弁装置５０の筐体５１は取付部６２の外形の軸方向に垂直な断面形状を非円形の六角形に形成される。図６７に示す弁装置５０の筐体５１は取付部６２の外形の軸方向に垂直な断面形状を非円形の四角形に形成される。 The housing 51 of the valve device 50 shown in FIG. 66 has a non-circular hexagonal cross-sectional shape perpendicular to the axial direction of the outer shape of the mounting portion 62. The housing 51 of the valve device 50 shown in FIG. 67 is formed in a non-circular quadrangle having a cross-sectional shape perpendicular to the axial direction of the outer shape of the mounting portion 62.

　これらの実施形態においても上記と同様に、筐体５１が外装部材２０の外側に配される第１、第２平面Ｑ１、Ｑ２を有するので、弁装置５０を外装部材２０に容易に取り付けることができる。尚、取付部６２の外形の軸方向に垂直な断面形状は四角形、六角形に限られず、他の多角形でもよい。 In these embodiments as well, similarly to the above, since the housing 51 has the first and second planes Q1 and Q2 arranged on the outside of the exterior member 20, the valve device 50 can be easily attached to the exterior member 20. it can. The cross-sectional shape of the mounting portion 62 perpendicular to the axial direction is not limited to a quadrangle or a hexagon, and may be another polygon.

　＜第２６実施形態＞
　次に、図６８は第２６実施形態の電動自動車１の蓄電デバイス１０の弁装置５０の底面図を示している。説明の便宜上、前述の図５１～図６１に示す第２０実施形態と同様の部分には同一の符号を付している。本実施形態は第２０実施形態に対して弁装置５０の取付部６２の形状が異なっている。その他の部分は第２０実施形態と同様である。 <26th Embodiment>
Next, FIG. 68 shows a bottom view of the valve device 50 of the power storage device 10 of the electric vehicle 1 of the 26th embodiment. For convenience of explanation, the same parts as those in the 20th embodiment shown in FIGS. 51 to 61 are designated by the same reference numerals. In this embodiment, the shape of the mounting portion 62 of the valve device 50 is different from that in the 20th embodiment. Other parts are the same as those in the 20th embodiment.

　弁装置５０の筐体５１は取付部６２の外形の軸方向に垂直な断面形状を円形に形成される。本実施形態においても上記と同様に、筐体５１が外装部材２０の外側に配される第１、第２平面Ｑ１、Ｑ２を有するので、弁装置５０を外装部材２０に容易に取り付けることができる。尚、取付部６２の外形の軸方向に垂直な断面形状を長軸がＸ方向に平行な楕円形に形成してもよい。 The housing 51 of the valve device 50 is formed with a circular cross-sectional shape perpendicular to the axial direction of the outer shape of the mounting portion 62. In the present embodiment as well, since the housing 51 has the first and second planes Q1 and Q2 arranged on the outside of the exterior member 20, the valve device 50 can be easily attached to the exterior member 20. .. The cross-sectional shape of the outer shape of the mounting portion 62 perpendicular to the axial direction may be formed into an elliptical shape whose long axis is parallel to the X direction.

　＜第２７実施形態＞
　次に、図６９は第２７実施形態の電動自動車１の蓄電デバイス１０の弁装置５０の側面断面図を示している。説明の便宜上、前述の図５１～図６１に示す第２０実施形態と同様の部分には同一の符号を付している。本実施形態は第２０実施形態に対して弁装置５０の構造が異なっている。その他の部分は第２０実施形態と同様である。 <27th Embodiment>
Next, FIG. 69 shows a side sectional view of the valve device 50 of the power storage device 10 of the electric vehicle 1 of the 27th embodiment. For convenience of explanation, the same parts as those in the 20th embodiment shown in FIGS. 51 to 61 are designated by the same reference numerals. In this embodiment, the structure of the valve device 50 is different from that in the 20th embodiment. Other parts are the same as those in the 20th embodiment.

　弁装置５０の筐体５１は弁機構を設けた弁機能部５２（図５４参照）が取付部６２と一体化され、取付部６２内に弁機構が設けられる。これにより、外装部材２０の内側から外側に向かって取付部６２、平行部７２の順に配される。取付部６２は外装部材２０に取り付けられ、内部に弁機構を設けられる。平行部７２の第１平面Ｑ１及び第２平面Ｑ２は外装部材２０の外側に配置され、周縁シール部２１が延びる方向（Ｘ方向）に平行に配される。 In the housing 51 of the valve device 50, the valve function portion 52 (see FIG. 54) provided with the valve mechanism is integrated with the mounting portion 62, and the valve mechanism is provided in the mounting portion 62. As a result, the mounting portion 62 and the parallel portion 72 are arranged in this order from the inside to the outside of the exterior member 20. The mounting portion 62 is mounted on the exterior member 20 and is provided with a valve mechanism inside. The first plane Q1 and the second plane Q2 of the parallel portion 72 are arranged outside the exterior member 20, and are arranged parallel to the direction in which the peripheral edge seal portion 21 extends (X direction).

　本実施形態においても上記と同様に、筐体５１が外装部材２０の外側に配される第１、第２平面Ｑ１、Ｑ２を有するので、弁装置５０を外装部材２０に容易に取り付けることができる。第２２実施形態と同様に、平行部７２の第１平面Ｑ１及び第２平面Ｑ２を、周縁シール部２１が延びる方向（Ｘ方向）に垂直に配してもよい。 In the present embodiment as well, since the housing 51 has the first and second planes Q1 and Q2 arranged on the outside of the exterior member 20, the valve device 50 can be easily attached to the exterior member 20. .. Similar to the 22nd embodiment, the first plane Q1 and the second plane Q2 of the parallel portion 72 may be arranged perpendicularly to the direction (X direction) in which the peripheral edge sealing portion 21 extends.

　尚、弁機構を取付部６２に設けると、外装部材２０の熱接着時にヒートシールバー９３（図５９参照）の熱及び圧力によって弁機構を損傷する虞がある。このため、他の実施形態のように、弁機構を外装部材２０の外側に配置するとより望ましい。 If the valve mechanism is provided on the mounting portion 62, the valve mechanism may be damaged by the heat and pressure of the heat seal bar 93 (see FIG. 59) when the exterior member 20 is thermally bonded. For this reason, it is more desirable to dispose the valve mechanism outside the exterior member 20 as in other embodiments.

　＜第２８実施形態＞
　次に、図７０は第２８実施形態の電動自動車１の蓄電デバイス１０の弁装置５０の側面断面図を示している。説明の便宜上、前述の図５１～図６１に示す第１実施形態と同様の部分には同一の符号を付している。本実施形態は第２０実施形態に対して弁装置５０の構造が異なっている。その他の部分は第２０実施形態と同様である。 <28th Embodiment>
Next, FIG. 70 shows a side sectional view of the valve device 50 of the power storage device 10 of the electric vehicle 1 of the 28th embodiment. For convenience of explanation, the same parts as those in the first embodiment shown in FIGS. 51 to 61 are designated by the same reference numerals. In this embodiment, the structure of the valve device 50 is different from that in the 20th embodiment. Other parts are the same as those in the 20th embodiment.

　弁装置５０の筐体５１は弁機構を設けた弁機能部５２（図５４参照）に第１、第２平面Ｑ１、Ｑ２が設けられる。これにより、外装部材２０の内側から外側に向かって取付部６２、弁機能部５２の順に配される。取付部６２は外装部材２０に取り付けられる。弁機能部５２の第１平面Ｑ１及び第２平面Ｑ２は外装部材２０の外側に配置され、周縁シール部２１が延びる方向（Ｘ方向）に平行に配される。 The housing 51 of the valve device 50 is provided with first and second planes Q1 and Q2 in a valve function portion 52 (see FIG. 54) provided with a valve mechanism. As a result, the mounting portion 62 and the valve function portion 52 are arranged in this order from the inside to the outside of the exterior member 20. The mounting portion 62 is mounted on the exterior member 20. The first plane Q1 and the second plane Q2 of the valve function portion 52 are arranged outside the exterior member 20, and are arranged parallel to the direction in which the peripheral edge seal portion 21 extends (X direction).

　本実施形態においても上記と同様に、筐体５１が外装部材２０の外側に配される第１、第２平面Ｑ１、Ｑ２を有するので、弁装置５０を外装部材２０に容易に取り付けることができる。第２２実施形態と同様に、平行部７２の第１平面Ｑ１及び第２平面Ｑ２を、周縁シール部２１が延びる方向（Ｘ方向）に垂直に配してもよい。 In the present embodiment as well, since the housing 51 has the first and second planes Q1 and Q2 arranged on the outside of the exterior member 20, the valve device 50 can be easily attached to the exterior member 20. .. Similar to the 22nd embodiment, the first plane Q1 and the second plane Q2 of the parallel portion 72 may be arranged perpendicularly to the direction (X direction) in which the peripheral edge sealing portion 21 extends.

　尚、第２０～第２６実施形態の弁装置５０の平行部７２に設けられる第１、第２平面Ｑ１、Ｑ２が、弁機能部５２の弁機構上を通るＸＹ面内まで上方に延びて形成されてもよい。 The first and second planes Q1 and Q2 provided in the parallel portion 72 of the valve device 50 of the 20th to 26th embodiments extend upward into the XY plane passing over the valve mechanism of the valve function portion 52. May be done.

　第２０～第２８実施形態において、通気路６３の軸方向に垂直な断面形状を多角形、楕円、長円等により形成してもよい。弁機能部５２の軸方向に垂直な断面形状を多角形、楕円、長円等により形成してもよい。 In the 20th to 28th embodiments, the cross-sectional shape perpendicular to the axial direction of the air passage 63 may be formed by a polygon, an ellipse, an oval, or the like. The cross-sectional shape perpendicular to the axial direction of the valve function portion 52 may be formed by a polygon, an ellipse, an oval, or the like.

　また、第１、第２平面Ｑ１、Ｑ２の両端をそれぞれ連結する湾曲面Ｑ３、Ｑ４を平面により形成してもよく、屈曲した複数の平面により形成してもよい。これにより、第１、第２平面Ｑ１、Ｑ２を設けた平行部７２または弁機能部５２の軸方向に垂直な断面形状は、四角形、六角形、八角形等の多角形により形成される。 Further, the curved surfaces Q3 and Q4 connecting both ends of the first and second planes Q1 and Q2 may be formed by planes, or may be formed by a plurality of bent planes. As a result, the cross-sectional shape perpendicular to the axial direction of the parallel portion 72 or the valve function portion 52 provided with the first and second planes Q1 and Q2 is formed by a polygon such as a quadrangle, a hexagon, or an octagon.

　また、第２～第１９実施形態の電動自動車１の蓄電デバイス１０の弁装置５０に本実施形態と同様の第１、第２平面Ｑ１、Ｑ２を設けてもよい。 Further, the valve device 50 of the power storage device 10 of the electric vehicle 1 of the second to nineteenth embodiments may be provided with the same first and second planes Q1 and Q2 as those of the present embodiment.

　＜第２９実施形態＞
　次に、図７１、図７２は第２９実施形態の電動自動車１の蓄電デバイス１０の弁装置５０の正面図及び正面断面図を示している。説明の便宜上、前述の図１～図１８に示す第１実施形態と同様の部分には同一の符号を付している。本実施形態は第１実施形態に対して弁装置５０の構成が異なっている。その他の部分は第１実施形態と同様である。 <29th Embodiment>
Next, FIGS. 71 and 72 show a front view and a front sectional view of the valve device 50 of the power storage device 10 of the electric vehicle 1 of the 29th embodiment. For convenience of explanation, the same parts as those in the first embodiment shown in FIGS. 1 to 18 are designated by the same reference numerals. In this embodiment, the configuration of the valve device 50 is different from that in the first embodiment. Other parts are the same as those in the first embodiment.

　弁装置５０は、弁機能部５２、ガス通過部６１及び取付部６２を備えている。弁機能部５２、ガス通過部６１及び取付部６２は、一体で構成されてもよく、別体で構成されてもよい。それぞれを別体で構成すると、各部の材料として異なる材料を選択することが可能となる。 The valve device 50 includes a valve function portion 52, a gas passage portion 61, and a mounting portion 62. The valve function portion 52, the gas passing portion 61, and the mounting portion 62 may be integrally formed or may be formed separately. If each is composed of a separate body, it becomes possible to select a different material as the material of each part.

　弁機能部５２、ガス通過部６１及び取付部６２はＺ方向に並び、弁機能部５２の下方にガス通過部６１を介して取付部６２が配置される。弁機能部５２、ガス通過部６１及び取付部６２の外形は、それぞれＺ方向に平行な中心軸を有する略円柱形状であり、互いに同軸である。 The valve functioning portion 52, the gas passing portion 61 and the mounting portion 62 are arranged in the Z direction, and the mounting portion 62 is arranged below the valve functioning portion 52 via the gas passing portion 61. The outer shapes of the valve function portion 52, the gas passage portion 61, and the mounting portion 62 each have a substantially cylindrical shape having a central axis parallel to the Z direction, and are coaxial with each other.

　弁装置５０の筐体５１の弁機能部５２部分は例えば金属、樹脂等により筒状に形成される。取付部６２は管状の金属、樹脂等で構成され、外装部材２０に取り付けられる。上記したように、取付部６２は包装材１５、２５の最内層と直に接着する材料が好ましい。また、弁機能部５２の筐体５１の材質の融点を取付部６２の材質の融点よりも高くするとよい。 The valve function portion 52 portion of the housing 51 of the valve device 50 is formed in a tubular shape by, for example, metal, resin, or the like. The mounting portion 62 is made of tubular metal, resin, or the like, and is mounted on the exterior member 20. As described above, the mounting portion 62 is preferably made of a material that directly adheres to the innermost layers of the packaging materials 15 and 25. Further, the melting point of the material of the housing 51 of the valve function portion 52 may be higher than the melting point of the material of the mounting portion 62.

　取付部６２の弁機能部５２側とは反対側の先端（下端）の外周部にはコーナーＲ（例えば、Ｒ＝０．２ｍｍ～２．０ｍｍ）が形成されている。これにより、蓄電素子１１を傷つける可能性を低くできるとともに、包装材１５、２５の熱接着性樹脂層３８の傷を防止することができる。尚、取付部６２の先端の内周面上にコーナーＲを設けてもよい。 A corner R (for example, R = 0.2 mm to 2.0 mm) is formed on the outer peripheral portion of the tip (lower end) of the mounting portion 62 opposite to the valve function portion 52 side. As a result, the possibility of damaging the power storage element 11 can be reduced, and the thermosetting resin layers 38 of the packaging materials 15 and 25 can be prevented from being damaged. A corner R may be provided on the inner peripheral surface of the tip of the mounting portion 62.

　ガス通過部６１は例えば金属製パイプ、樹脂製パイプ等の管状部材により形成されている。ガス通過部６１は取付部６２と弁機能部５２との間に設けられ、取付部６２内を通過したガスを弁機能部５２内へ通過させるように構成されている。ガス通過部６１の長手方向の長さは、例えば１０ｍｍ以上である。ガス通過部６１の長手方向の長さを十分確保することによって、弁装置５０が外装部材２０に取り付けられた際に弁機能部５２が外装部材２０の外周よりも外側に離れて配置される。 The gas passage portion 61 is formed of a tubular member such as a metal pipe or a resin pipe. The gas passing portion 61 is provided between the mounting portion 62 and the valve functioning portion 52, and is configured to allow the gas that has passed through the mounting portion 62 to pass into the valve functioning portion 52. The length of the gas passing portion 61 in the longitudinal direction is, for example, 10 mm or more. By ensuring a sufficient length of the gas passage portion 61 in the longitudinal direction, the valve function portion 52 is arranged outside the outer circumference of the exterior member 20 when the valve device 50 is attached to the exterior member 20.

　弁装置５０の弁機能部５２、ガス通過部６１及び取付部６２の外形は断面円形に形成される。ガス通過部６１及び取付部６２は全体としては略円筒形状であり、ガス通過部６１及び取付部６２の内部には通気路６３が形成されている。通気路６３は、Ｚ方向に沿って延びる。通気路６３は断面円形である。ガス通過部６１及び取付部６２の径方向の厚みは、周方向に沿って概ね一定である。 The outer shapes of the valve function portion 52, the gas passing portion 61, and the mounting portion 62 of the valve device 50 are formed to have a circular cross section. The gas passing portion 61 and the mounting portion 62 have a substantially cylindrical shape as a whole, and a ventilation path 63 is formed inside the gas passing portion 61 and the mounting portion 62. The vent 63 extends along the Z direction. The air passage 63 has a circular cross section. The radial thicknesses of the gas passing portion 61 and the mounting portion 62 are substantially constant along the circumferential direction.

　弁機能部５２の外形の直径はガス通過部６１及び取付部６２の外形の直径よりも大きい。即ち、弁装置５０をＺ方向に視たとき、弁機能部５２はガス通過部６１及び取付部６２の外形から、収納部１６（図６参照）の深さ方向を含む各方向にはみ出している。その結果、弁機能部５２とガス通過部６１との境界には段差５１ｃが形成されている。この段差５１ｃにより、弁装置５０はガス通過部６１から弁機能部５２に向かって不連続に拡幅された形状となる。 The outer diameter of the valve function portion 52 is larger than the outer diameter of the gas passing portion 61 and the mounting portion 62. That is, when the valve device 50 is viewed in the Z direction, the valve function portion 52 protrudes from the outer shapes of the gas passing portion 61 and the mounting portion 62 in each direction including the depth direction of the storage portion 16 (see FIG. 6). .. As a result, a step 51c is formed at the boundary between the valve function portion 52 and the gas passage portion 61. Due to this step 51c, the valve device 50 has a shape that is discontinuously widened from the gas passing portion 61 toward the valve function portion 52.

　即ち、弁機構を有する弁機能部５２から管状のガス通過部６１が導出され、弁機能部５２がガス通過部６１に対して拡幅される。このため、ガス通過部６１は必要な断面積の通気路６３を形成する最小限の外径を有していればよく、弁装置５０を備えた蓄電デバイスパック５の軽量化が図られている。尚、筐体５１から導出されるガス通過部６１は必ずしも直線状である必要はなく、例えばＬ字形状であってもよい。 That is, the tubular gas passage portion 61 is derived from the valve function portion 52 having the valve mechanism, and the valve function portion 52 is widened with respect to the gas passage portion 61. Therefore, the gas passage portion 61 only needs to have a minimum outer diameter for forming the ventilation passage 63 having the required cross-sectional area, and the weight of the power storage device pack 5 provided with the valve device 50 is reduced. .. The gas passing portion 61 led out from the housing 51 does not necessarily have to be linear, and may be, for example, L-shaped.

　上述のように、弁装置５０は外装部材２０内で発生したガスに起因して外装部材２０内の圧力が所定値以上となった場合に、外装部材２０内のガスを外部に放出するように構成されている。仮に弁装置５０の密封性が必要以上に高い場合には、外装部材２０内の圧力が所定値以上となったとしても弁装置５０が機能しない可能性がある。一方、弁装置５０の密封性が必要以上に低い場合には、平常時（外装部材２０内の圧力が所定値未満の時）に外部環境から外装部材２０内へ水蒸気（水分）が侵入する可能性が高い。 As described above, the valve device 50 releases the gas in the exterior member 20 to the outside when the pressure in the exterior member 20 exceeds a predetermined value due to the gas generated in the exterior member 20. It is configured. If the sealing performance of the valve device 50 is higher than necessary, the valve device 50 may not function even if the pressure inside the exterior member 20 exceeds a predetermined value. On the other hand, when the sealing property of the valve device 50 is lower than necessary, water vapor (moisture) can enter the exterior member 20 from the external environment in normal times (when the pressure inside the exterior member 20 is less than a predetermined value). Highly sex.

　本実施形態は弁装置５０のヘリウムリーク量を調整することによって、弁装置５０の高度な密封性と、外装部材２０内への水蒸気の侵入の高度な抑制とを両立している。 In this embodiment, by adjusting the amount of helium leak in the valve device 50, both the high degree of sealing performance of the valve device 50 and the high degree of suppression of the intrusion of water vapor into the exterior member 20 are achieved.

　具体的には、２５℃環境において、ＪＩＳ　Ｚ２３３１：２００６の「ヘリウム漏れ試験方法」における「真空吹付け法（スプレー法）」に規定された方法に準拠して測定される、弁装置５０の二次側から一次側へのヘリウムリーク量が５．０×１０-11Ｐａ・ｍ3／ｓｅｃ以上、５．０×１０-6Ｐａ・ｍ3／ｓｅｃ以下にしている。これにより、弁装置５０の高度な密封性と、外装部材２０内への水蒸気の侵入の高度な抑制とを両立することができる。 Specifically, in a 25 ° C. environment, the valve device 50-2 is measured in accordance with the method specified in the "vacuum spraying method (spray method)" in the "helium leakage test method" of JIS Z2331: 2006. The amount of helium leak from the secondary side to the primary side is 5.0 × 10 -11 Pa · m 3 / sec or more and 5.0 × 10 -6 Pa · m 3 / sec or less. As a result, it is possible to achieve both a high degree of sealing performance of the valve device 50 and a high degree of suppression of the intrusion of water vapor into the exterior member 20.

　尚、弁装置５０の二次側とは、弁装置５０が外装部材２０に取り付けられた場合における外装部材２０の外側を示す。また、弁装置５０の一次側とは、弁装置５０が外装部材２０に取り付けられた場合における外装部材２０の内側を示す。 The secondary side of the valve device 50 refers to the outside of the exterior member 20 when the valve device 50 is attached to the exterior member 20. Further, the primary side of the valve device 50 indicates the inside of the exterior member 20 when the valve device 50 is attached to the exterior member 20.

　弁装置５０において、ヘリウムリーク量の上限として、好ましくは約４．５×１０-6Ｐａ・ｍ3／ｓｅｃ以下、より好ましくは約１．０×１０-6Ｐａ・ｍ3／ｓｅｃ以下、さらに好ましくは約１．０×１０-7Ｐａ・ｍ3／ｓｅｃ以下、さらに好ましくは約１．０×１０-8Ｐａ・ｍ3／ｓｅｃ以下が挙げられる。 In the valve device 50, the upper limit of the amount of helium leak is preferably about 4.5 × 10 -6 Pa · m 3 / sec or less, more preferably about 1.0 × 10 -6 Pa · m 3 / sec or less, and further. It is preferably about 1.0 × 10 -7 Pa · m 3 / sec or less, and more preferably about 1.0 × 10 -8 Pa · m 3 / sec or less.

　これにより、ヘリウムリーク量の好ましい範囲として、５．０×１０-11Ｐａ・ｍ3／ｓｅｃから４．５×１０-6Ｐａ・ｍ3／ｓｅｃ程度、５．０×１０-11Ｐａ・ｍ3／ｓｅｃから１．０×１０-6Ｐａ・ｍ3／ｓｅｃ程度、５．０×１０-11Ｐａ・ｍ3／ｓｅｃから１．０×１０-7Ｐａ・ｍ3／ｓｅｃ程度、５．０×１０-11Ｐａ・ｍ3／ｓｅｃから１．０×１０-8Ｐａ・ｍ3／ｓｅｃ程度が挙げられる。 As a result, the preferable range of the helium leak amount is about 5.0 × 10 -11 Pa · m 3 / sec to 4.5 × 10 -6 Pa · m 3 / sec, 5.0 × 10 -11 Pa · m. From 3 / sec to 1.0 × 10 -6 Pa ・ m 3 / sec, 5.0 × 10 -11 Pa ・ m 3 / sec to 1.0 × 10 -7 Pa ・ m 3 / sec, 5. From 0 × 10 -11 Pa · m 3 / sec to 1.0 × 10 -8 Pa · m 3 / sec.

　ヘリウムリーク量が上記の上限を充足することにより、外部環境から外装部材２０内への水蒸気（水分）の侵入を高度に抑制することができる。また、ヘリウムリーク量が上記の下限を充足することにより、外装部材２０内でガスが発生した場合に当該ガスを外部に放出することができる。尚、ヘリウムリーク量が小さすぎる場合には、外装部材２０内で発生したガスを安定的に外装部材２０の外部に放出することが難しい。また、そのような弁装置５０が長期間開放されずに蓄電デバイス１０が使用され続けると、内圧が設計値まで上昇した場合にも弁装置５０が適切に開放されない可能性が高まる。 When the amount of helium leak satisfies the above upper limit, the invasion of water vapor (moisture) from the external environment into the exterior member 20 can be highly suppressed. Further, when the amount of helium leak satisfies the above lower limit, the gas can be released to the outside when the gas is generated in the exterior member 20. If the amount of helium leak is too small, it is difficult to stably release the gas generated in the exterior member 20 to the outside of the exterior member 20. Further, if the power storage device 10 is used continuously without opening the valve device 50 for a long period of time, there is a high possibility that the valve device 50 will not be properly opened even when the internal pressure rises to the design value.

　更に、弁装置５０において、ヘリウムリーク量が５．０×１０-11Ｐａ・ｍ3／ｓｅｃから２．０×１０-10Ｐａ・ｍ3／ｓｅｃ程度の範囲、さらには５．０×１０-11Ｐａ・ｍ3／ｓｅｃから１．５×１０-10Ｐａ・ｍ3／ｓｅｃ程度の範囲に設定されていると、外部環境から外装部材２０への水蒸気（水分）の侵入を、特に高度に抑制することができる。このようなヘリウムリーク量に設定するためには、後述の通り、従来の逆止弁では行われていない高水準にて、弁機構の弁座５１ａとボール５４とが接する部分の形状を極めて精度高く設計・加工する必要がある。 Furthermore, the valve in the device 50, the helium leakage amount is 5.0 × 10 -11 Pa · m 3 / sec from 2.0 × 10 -10 Pa · m 3 / sec in the range of about news 5.0 × 10 - When the range is set from 11 Pa · m 3 / sec to 1.5 × 10 -10 Pa · m 3 / sec, the intrusion of water vapor (moisture) from the external environment into the exterior member 20 is particularly highly advanced. It can be suppressed. In order to set such a helium leak amount, as will be described later, the shape of the portion where the valve seat 51a of the valve mechanism and the ball 54 are in contact with each other is extremely accurate at a high level which is not performed by the conventional check valve. It is necessary to design and process it high.

　具体的にヘリウムリーク試験は試験装置として、ヘリウムリークディテクターを用いる。また、弁装置５０のガス弁（弁機能部５２）をリークテスト用治具（ガス弁が塞がっているダミー弁装置を入れた場合には、ヘリウムリークが無い事を確認した治具）に設置して、テストポートを介してヘリウムリークディテクターに設置する。治具とヘリウムリークディテクター間でも、ヘリウムリークがないことを確認する。 Specifically, the helium leak test uses a helium leak detector as a test device. Further, the gas valve (valve function unit 52) of the valve device 50 is installed on a leak test jig (a jig confirmed that there is no helium leak when a dummy valve device in which the gas valve is blocked is inserted). Then, install it in the helium leak detector via the test port. Make sure there is no helium leak between the jig and the helium leak detector.

　その後、弁装置５０の一次側から１３Ｐａに真空引きし、弁装置５０の二次側から９９．９９％のヘリウムガスをスプレーし、測定を開始する。スプレーは１～２秒間、待機時間は２～４秒間として、評価結果を記録する。なお、念の為、ＪＩＳ　Ｚ２３３１：２００６「ヘリウム漏れ試験方法」の「真空外覆法（真空フード法）」に規定された方法に準拠して、同じ弁装置５０について、容積５０ｍＬのフードを被せて２０秒間待機させ、測定結果が同様であることを確認してもよい。測定環境温度は、いずれも２５℃である。 After that, evacuate from the primary side of the valve device 50 to 13 Pa, spray 99.99% helium gas from the secondary side of the valve device 50, and start the measurement. The evaluation result is recorded with the spraying time being 1 to 2 seconds and the waiting time being 2 to 4 seconds. As a precaution, cover the same valve device 50 with a hood with a volume of 50 mL in accordance with the method specified in the "Vacuum Covering Method (Vacuum Hood Method)" of JIS Z2331: 2006 "Helium Leakage Test Method". You may wait for 20 seconds and confirm that the measurement results are the same. The measurement environment temperature is 25 ° C. in each case.

　弁装置５０において、一次側と二次側の差圧（すなわち、弁装置５０の開放圧力）としては、下限については、好ましくは約０．０５ＭＰａ以上、より好ましくは約０．１ＭＰａ以上が挙げられる。上限については、好ましくは約１ＭＰａ以下、より好ましくは約０．３ＭＰａ以下が挙げられる。これにより、好ましい範囲としては、０．０５～１ＭＰａ程度、０．０５～０．３ＭＰａ程度、０．１～１ＭＰａ程度、０．１～０．３ＭＰａ程度が挙げられる。 In the valve device 50, the differential pressure between the primary side and the secondary side (that is, the opening pressure of the valve device 50) is preferably about 0.05 MPa or more, more preferably about 0.1 MPa or more as the lower limit. .. The upper limit is preferably about 1 MPa or less, more preferably about 0.3 MPa or less. As a result, preferred ranges include about 0.05 to 1 MPa, about 0.05 to 0.3 MPa, about 0.1 to 1 MPa, and about 0.1 to 0.3 MPa.

　これらの差圧を充足することにより、外装部材２０の内部でガスが発生した場合には、当該ガスを外部に好適に放出することができ、かつ、外部環境からの水蒸気（水分）の侵入を高度に抑制することができる。 By satisfying these differential pressures, when gas is generated inside the exterior member 20, the gas can be suitably released to the outside, and water vapor (moisture) from the external environment can enter. It can be highly suppressed.

　弁装置５０が取り付けられた蓄電デバイス１０（外装部材２０）の内部の設定圧力としては、一定圧力以下に設定されていることが好ましい。内圧の設定値は、弁装置付き包装体の種類に応じて適宜設定されるが、好ましくは約０．１ＭＰａ以下、より好ましくは約１．０×１０-2ＭＰａ以下である。下限については例えば約１．０×１０-10ＭＰａ以上が挙げられる。これにより、当該内部圧力の好ましい範囲としては、１．０×１０-10～０．１ＭＰａ程度、１．０×１０-10～１．０×１０-2ＭＰａ程度が挙げられる。 The internal set pressure of the power storage device 10 (exterior member 20) to which the valve device 50 is attached is preferably set to a constant pressure or less. The set value of the internal pressure is appropriately set according to the type of the package with the valve device, but is preferably about 0.1 MPa or less, more preferably about 1.0 × 10 −2 MPa or less. As the lower limit, for example, about 1.0 × 10 -10 MPa or more can be mentioned. As a result, preferable ranges of the internal pressure include about 1.0 × 10 -10 to 0.1 MPa and about 1.0 × 10 -10 to 1.0 × 10 −2 MPa.

　弁装置５０において、ヘリウムリーク量は、公知の方法により設定することができる。例えば、弁装置５０の弁機能部５２（弁機構）を構成している部材（例えば、ボール５４、弁座５１ａ、バネ５６、排気口５１ｂ）の材料、形状、大きさ、さらにはバネ５６によるボール５４を押しつける力などを設計することによって、ヘリウムリーク量を調整することができる。 In the valve device 50, the amount of helium leak can be set by a known method. For example, the material, shape, size, and further of the spring 56 of the members (for example, the ball 54, the valve seat 51a, the spring 56, and the exhaust port 51b) constituting the valve function portion 52 (valve mechanism) of the valve device 50. The amount of helium leak can be adjusted by designing the force for pressing the ball 54 or the like.

　例えば、弁機構のボール５４または弁座５１ａの一方に弾性体を用い、他方に金属等の高硬度の部材を用いることにより、ヘリウムリーク量を５．０×１０-11Ｐａ・ｍ3／ｓｅｃ以上、５．０×１０-6Ｐａ・ｍ3／ｓｅｃ以下の範囲に設定しやすくなる。 For example, by using an elastic body for one of the ball 54 or the valve seat 51a of the valve mechanism and using a high-hardness member such as metal for the other, the amount of helium leak is 5.0 × 10 -11 Pa · m 3 / sec. As described above, it becomes easy to set the range of 5.0 × 10 -6 Pa · m 3 / sec or less.

　ヘリウムリーク量を小さくするためには、例えば弁機構のボール５４及び弁座５１ａの両方に弾性体を用いることが有効である。しかし、前述したように、ヘリウムリーク量が小さくなりすぎると、外装部材２０内で発生したガスを適切に外部に放出することが難しくなる。このため、弁機構を構成する部材の材料、形状、大きさ等については適宜調整する。例えば、弁機構において、ボール５４と接触する弁座５１ａがボール５４の表面形状に沿う形状であると、ヘリウムリーク量を上記範囲に設計しやすい。 In order to reduce the amount of helium leak, it is effective to use an elastic body for both the ball 54 and the valve seat 51a of the valve mechanism, for example. However, as described above, if the amount of helium leak becomes too small, it becomes difficult to properly release the gas generated in the exterior member 20 to the outside. Therefore, the material, shape, size, etc. of the members constituting the valve mechanism are appropriately adjusted. For example, in the valve mechanism, if the valve seat 51a in contact with the ball 54 has a shape that follows the surface shape of the ball 54, it is easy to design the helium leak amount within the above range.

　即ち、弁装置５０において、ヘリウムリーク量を５．０×１０-11Ｐａ・ｍ3／ｓｅｃから２．０×１０-10Ｐａ・ｍ3／ｓｅｃ程度の範囲、さらには５．０×１０-11Ｐａ・ｍ3／ｓｅｃから１．５×１０-10Ｐａ・ｍ3／ｓｅｃ程度の範囲に設定するためには、従来の逆止弁では行われていない高水準にて、弁機構の弁座５１ａとボール５４とが接する部分の形状を極めて精度高く設計・加工する必要がある。 That is, the valve in the apparatus 50, the helium leakage amount of 5.0 × 10 -11 Pa · m 3 / sec from 2.0 × 10 -10 Pa · m 3 / sec in the range of about news 5.0 × 10 - In order to set the range from 11 Pa ・ m 3 / sec to 1.5 × 10 -10 Pa ・ m 3 / sec, the valve of the valve mechanism is at a high level, which is not possible with conventional check valves. It is necessary to design and process the shape of the portion where the seat 51a and the ball 54 are in contact with each other with extremely high accuracy.

　例えば、弁座５１ａのボール５４と接触する箇所及びボール５４表面の表面平均粗さを２０μｍ以下、好ましくは５μｍ以下、より好ましくは１μｍ以下とすること等が有効である。ただし、あまり高精度なもの同士を接触させた場合には弁装置５０が適切に作動しない（弁機能部５２が開放しない）という問題が生じ得る。このため、表面粗さは、ヘリウムリーク量が上記範囲となるように調整する必要がある。 For example, it is effective to set the surface contact roughness of the valve seat 51a with the ball 54 and the surface average roughness of the ball 54 surface to 20 μm or less, preferably 5 μm or less, and more preferably 1 μm or less. However, there may be a problem that the valve device 50 does not operate properly (the valve function portion 52 does not open) when the objects with too high precision are brought into contact with each other. Therefore, the surface roughness needs to be adjusted so that the amount of helium leak is within the above range.

　図７３は蓄電デバイスパック５の側面断面図を示している。蓄電デバイスパック５は複数の蓄電デバイス１０がＹ方向に並設され、外装容器６内に収容される。尚、外装容器６内で複数の蓄電デバイス１０を直に接触するように並設してもよく、蓄電デバイス１０相互間に部材を挟んで並設してもよい。 FIG. 73 shows a side sectional view of the power storage device pack 5. In the power storage device pack 5, a plurality of power storage devices 10 are arranged side by side in the Y direction and housed in the outer container 6. A plurality of power storage devices 10 may be arranged side by side in the outer container 6 so as to be in direct contact with each other, or members may be sandwiched between the power storage devices 10 and arranged side by side.

　外装容器６には、各蓄電デバイス１０の弁装置５０が貫通する孔（不図示）が形成されている。弁装置５０の少なくとも弁機能部５２は、該孔から外装容器６の外側に突出している。即ち、各弁装置５０において、ガス通過部６１の長手方向の長さとしては、弁機能部５２が外装容器６の外周よりも外側に位置する程度の長さが確保されている。 The outer container 6 is formed with a hole (not shown) through which the valve device 50 of each power storage device 10 penetrates. At least the valve function portion 52 of the valve device 50 projects from the hole to the outside of the outer container 6. That is, in each valve device 50, the length of the gas passage portion 61 in the longitudinal direction is secured so that the valve function portion 52 is located outside the outer circumference of the outer container 6.

　これにより、蓄電デバイスパック５において複数の弁装置５０のいずれかが作動した際に、弁装置５０から放出されたガスは外装容器６から離れた位置で放出される。従って、ガスが外装容器６の外側に放出されるため、ガスが外装容器６内に充満して外装部材２０（図６参照）の外層を劣化させる事態を抑制することができる。 As a result, when any of the plurality of valve devices 50 is activated in the power storage device pack 5, the gas released from the valve devices 50 is released at a position away from the outer container 6. Therefore, since the gas is discharged to the outside of the outer container 6, it is possible to suppress a situation in which the gas fills the outer container 6 and deteriorates the outer layer of the outer member 20 (see FIG. 6).

　また、蓄電デバイス１０のＹ方向の長さが弁機能部５２のＹ方向の長さよりも短い場合に、蓄電デバイス１０をＹ方向に並べると、隣接する弁機能部５２が干渉する。この時、ガス通過部６１の長手方向の長さがある程度確保されているため、複数の弁装置５０が扇状に広がる。これにより、外装部材２０を互いに接触した状態で蓄電デバイス１０を並べることができる。このため、弁機能部５２のＹ方向の長さが長い場合に蓄電デバイスパック５の大型化を抑制することができる。 Further, when the length of the power storage device 10 in the Y direction is shorter than the length of the valve function unit 52 in the Y direction, if the power storage devices 10 are arranged in the Y direction, the adjacent valve function units 52 interfere with each other. At this time, since the length of the gas passing portion 61 in the longitudinal direction is secured to some extent, the plurality of valve devices 50 spread in a fan shape. As a result, the power storage devices 10 can be arranged with the exterior members 20 in contact with each other. Therefore, when the length of the valve function portion 52 in the Y direction is long, it is possible to suppress the increase in size of the power storage device pack 5.

　本実施形態によると、弁装置５０が取付部６２と弁機能５２との間にガス通過部６１を有し、弁機能５２が外装部材２０の外周よりも外側に位置する。これにより、弁装置５０から放出されたガスが外装部材２０から離れた位置で放出されるため、外装部材２０に当たりにくくなる。従って、外装部材２０の外層の劣化を抑制することができる。 According to the present embodiment, the valve device 50 has a gas passing portion 61 between the mounting portion 62 and the valve function 52, and the valve function 52 is located outside the outer circumference of the exterior member 20. As a result, the gas released from the valve device 50 is released at a position away from the exterior member 20, so that it is difficult to hit the exterior member 20. Therefore, deterioration of the outer layer of the exterior member 20 can be suppressed.

　また、ガス通過部の長さが１０ｍｍ以上であるので、弁機能５２が外装部材２０の外周よりも外側に位置する蓄電デバイス１０を容易に実現することができる。 Further, since the length of the gas passing portion is 10 mm or more, it is possible to easily realize the power storage device 10 in which the valve function 52 is located outside the outer circumference of the exterior member 20.

　尚、ガス通過部６１の形状、長さを適宜設定することによって、弁装置５０によってガスが放出される場所をコントロールすることができる。 By appropriately setting the shape and length of the gas passing portion 61, the place where the gas is discharged can be controlled by the valve device 50.

　また、弁装置５０ヘリウムリーク量を５．０×１０-11Ｐａ・ｍ3／ｓｅｃ以上、５．０×１０-6Ｐａ・ｍ3／ｓｅｃ以下にしている。これにより、外装部材２０内の圧力が所定値以上となった際に弁装置５０により確実に排気することができる。一方、平常時（外装部材２０内の圧力が所定値未満の時）に外部環境から外装部材２０内への水蒸気（水分）の侵入を防止することができる。 Further, the valve device 50 helium leak amount is set to 5.0 × 10 -11 Pa · m 3 / sec or more and 5.0 × 10 -6 Pa · m 3 / sec or less. As a result, when the pressure inside the exterior member 20 exceeds a predetermined value, the valve device 50 can reliably exhaust the air. On the other hand, it is possible to prevent water vapor (moisture) from entering the exterior member 20 from the external environment in normal times (when the pressure inside the exterior member 20 is less than a predetermined value).

　尚、第２～第２８実施形態の電動自動車１の蓄電デバイス１０の弁装置５０に本実施形態と同様のガス通過部６１を設けてもよい。 Note that the valve device 50 of the power storage device 10 of the electric vehicle 1 of the second to 28th embodiments may be provided with the same gas passing portion 61 as that of the present embodiment.

　＜第３０実施形態＞
　次に、図７４は第３０実施形態の電動自動車１の蓄電デバイスパック５の側面断面図を示している。説明の便宜上、前述の図７１～図７３に示す第２９実施形態と同様の部分には同一の符号を付している。本実施形態は第２９実施形態に対して弁装置５０の構造が異なっている。その他の部分は第２９実施形態と同様である。 <30th Embodiment>
Next, FIG. 74 shows a side sectional view of the power storage device pack 5 of the electric vehicle 1 according to the thirtieth embodiment. For convenience of explanation, the same parts as those in the 29th embodiment shown in FIGS. 71 to 73 are designated by the same reference numerals. In this embodiment, the structure of the valve device 50 is different from that in the 29th embodiment. Other parts are the same as those in the 29th embodiment.

　前述の第２９実施形態は、蓄電デバイスパック５に含まれる蓄電デバイス１０と同数の弁装置５０が使用される。このため、弁装置５０の数が増えると平常時に弁装置５０の二次側から一次側に水蒸気（水分）が侵入する可能性が高くなる。言い換えると、１つの蓄電デバイス１０当たりに浸入する水分の量が増える。また、弁装置５０の数が増えると蓄電デバイスパック５のコストが増加する。これに対して本実施形態は複数の蓄電デバイス１０に対して１つの弁装置５０が設けられる。 In the 29th embodiment described above, the same number of valve devices 50 as the power storage devices 10 included in the power storage device pack 5 are used. Therefore, as the number of valve devices 50 increases, there is a high possibility that water vapor (moisture) invades from the secondary side to the primary side of the valve devices 50 in normal times. In other words, the amount of water that penetrates into one power storage device 10 increases. Further, as the number of valve devices 50 increases, the cost of the power storage device pack 5 increases. On the other hand, in this embodiment, one valve device 50 is provided for a plurality of power storage devices 10.

　蓄電デバイスパック５は複数の蓄電デバイス１０と、外装容器６とを含んでいる。蓄電デバイスパック５においては、複数の蓄電デバイス１０に対して弁装置５０が１つだけ設けられている。 The power storage device pack 5 includes a plurality of power storage devices 10 and an outer container 6. In the power storage device pack 5, only one valve device 50 is provided for the plurality of power storage devices 10.

　図７５は弁装置５０の上面図を示し、図７６は図７５のＷ－Ｗ断面図を示している。弁装置５０は、弁機能５２と、複数のガス通過部６１と、複数の取付部６２とを含んでいる。ガス通過部６１はガス通過部６１ａ、ガス通過部６１ｂ、ガス通過部６１ｃ及びガス通過部６１ｄを含んでいる。弁機能５２、ガス通過部６１及び取付部６２は一体で構成されてもよく、別体で構成されてもよい。 FIG. 75 shows a top view of the valve device 50, and FIG. 76 shows a WW sectional view of FIG. 75. The valve device 50 includes a valve function 52, a plurality of gas passing portions 61, and a plurality of mounting portions 62. The gas passing portion 61 includes a gas passing portion 61a, a gas passing portion 61b, a gas passing portion 61c, and a gas passing portion 61d. The valve function 52, the gas passing portion 61, and the mounting portion 62 may be integrally configured or may be configured separately.

　弁機能５２は、例えば金属、樹脂等で構成される筐体５１内に上記と同様の弁機構が設けられる。弁機能５２の下端部の筐体５１内には通気路５１ｅが複数（図７６では４つ）に分岐して形成される。各通気路５１ｅにはガス通過部６１（６１ａ～６１ｄ）が接続されており、各ガス通過部６１（６１ａ～６１ｄ）にはそれぞれ取付部６２が連設されている。各取付部６２は各蓄電デバイス１０に取り付けられる。各ガス通過部６１の形状は取り付け先の蓄電デバイス１０の蓄電デバイスパック５内における位置に応じて適宜設定されている。 The valve function 52 is provided with a valve mechanism similar to the above in a housing 51 made of, for example, metal, resin, or the like. Vent passages 51e are formed in a plurality of (four in FIG. 76) in the housing 51 at the lower end of the valve function 52. Gas passing portions 61 (61a to 61d) are connected to each of the ventilation passages 51e, and mounting portions 62 are continuously provided in each of the gas passing portions 61 (61a to 61d). Each mounting portion 62 is mounted on each power storage device 10. The shape of each gas passing portion 61 is appropriately set according to the position of the power storage device 10 to be attached in the power storage device pack 5.

　これにより、弁装置５０は、複数の蓄電デバイス１０にそれぞれ取り付けられる複数の取付部６２を一の弁機能５２から分岐して設けられる。尚、弁機能５２（弁装置５０）のヘリウムリーク量は、第２９実施形態の弁装置５０のヘリウムリーク量と同様である。 As a result, the valve device 50 is provided with a plurality of attachment portions 62 attached to the plurality of power storage devices 10 by branching from one valve function 52. The helium leak amount of the valve function 52 (valve device 50) is the same as the helium leak amount of the valve device 50 of the 29th embodiment.

　蓄電デバイスパック５のいずれかの蓄電デバイス１０内の圧力が所定圧力に達すると、取付部６２及びガス通過部６１内を誘導されたガスがボール５４を排気口５１ｂ側に押圧する。ボール５４が押圧されてバネ５６が縮むと、蓄電デバイス１０内のガスはボール５４と弁座５１ａとの間に形成された隙間を通る。ボール５４と弁座５１ａとの間を通るガスはメンブレン５８を透過し、排気口５１ｂから蓄電デバイスパック５の外部に排出される。 When the pressure in any of the power storage device 10 of the power storage device pack 5 reaches a predetermined pressure, the gas guided in the mounting portion 62 and the gas passage portion 61 presses the ball 54 toward the exhaust port 51b. When the ball 54 is pressed and the spring 56 contracts, the gas in the power storage device 10 passes through the gap formed between the ball 54 and the valve seat 51a. The gas passing between the ball 54 and the valve seat 51a permeates the membrane 58 and is discharged to the outside of the power storage device pack 5 from the exhaust port 51b.

　本実施形態によると、弁装置５０は複数の蓄電デバイス１０にそれぞれ取り付けられる複数の取付部６２を一の弁機能５２から分岐して設けられる。これにより、蓄電デバイスパック５の弁機能５２の数が減るため、弁装置５０における微小な隙間から蓄電デバイス１０内に水蒸気が浸入する可能性を低減することができる。言い換えると、１つの蓄電デバイス１０当たりに浸入する水分の量を減らすことができる。また、弁装置５０の数が減るため、蓄電デバイスパック５のコストを抑制することができる。 According to the present embodiment, the valve device 50 is provided with a plurality of attachment portions 62 attached to the plurality of power storage devices 10 by branching from one valve function 52. As a result, the number of valve functions 52 of the power storage device pack 5 is reduced, so that the possibility that water vapor infiltrates into the power storage device 10 through a minute gap in the valve device 50 can be reduced. In other words, the amount of water that penetrates into one power storage device 10 can be reduced. Moreover, since the number of valve devices 50 is reduced, the cost of the power storage device pack 5 can be suppressed.

　第２９、第３０実施形態において、ガス通過部６１の内部に乾燥剤が保持されていてもよい。例えば、ガス通過部６１の内壁面上にシリカ等の乾燥剤が保持されると、弁装置５０の二次側から一次側へ水蒸気が侵入した場合に該水蒸気の影響を低減することができる。 In the 29th and 30th embodiments, the desiccant may be held inside the gas passing portion 61. For example, if a desiccant such as silica is held on the inner wall surface of the gas passage portion 61, the influence of the water vapor can be reduced when water vapor invades from the secondary side to the primary side of the valve device 50.

　また、ガス通過部６１、例えば、曲げ伸ばし可能な柔軟性を備えたフレキシブルチューブ等により構成されてもよい。これにより、ガスの排出場所をより自由に調整することができる。 Further, the gas passage portion 61 may be composed of, for example, a flexible tube having flexibility that allows bending and stretching. As a result, the gas discharge location can be adjusted more freely.

　尚、第２～第２８実施形態の電動自動車１の蓄電デバイス１０の弁装置５０に本実施形態と同様のガス通過部６１を設けてもよい。 Note that the valve device 50 of the power storage device 10 of the electric vehicle 1 of the second to 28th embodiments may be provided with the same gas passing portion 61 as that of the present embodiment.

　第１～第３０実施形態において、弁装置５０及び電極端子１２、１３の位置関係を変更することができる。例えば、弁装置５０が外装部材２０の上辺に取り付けられるが、弁装置５０を外装部材２０のＸ方向に対向する側辺に取り付けてもよい。即ち、外装部材２０がＹ方向の一端の底辺を除く３辺のいずれかに弁装置５０を取り付けられていればよい。この時、Ｘ方向に対向する両側辺に電極端子１２、１３を配して電極端子１２、１３の一方と同じ辺に弁装置５０を設けると、蓄電デバイスパック５の高さを抑制することができる。 In the first to thirtieth embodiments, the positional relationship between the valve device 50 and the electrode terminals 12 and 13 can be changed. For example, although the valve device 50 is attached to the upper side of the exterior member 20, the valve device 50 may be attached to the side side of the exterior member 20 facing the X direction. That is, the valve device 50 may be attached to any of the three sides of the exterior member 20 excluding the bottom of one end in the Y direction. At this time, if the electrode terminals 12 and 13 are arranged on both sides facing the X direction and the valve device 50 is provided on the same side as one of the electrode terminals 12 and 13, the height of the power storage device pack 5 can be suppressed. it can.

　また、両方の電極端子１２、１３が外装部材２０の周縁の同一の辺に配置され、弁装置５０が２つの電極端子１２、１３の間に配置されてもよい。また、両方の電極端子１２、１３が外装部材２０の周縁の同一の辺に配置され、電極端子１２、１３が配置された辺以外の辺に弁装置が配置されてもよい。 Further, both electrode terminals 12 and 13 may be arranged on the same side of the peripheral edge of the exterior member 20, and the valve device 50 may be arranged between the two electrode terminals 12 and 13. Further, both electrode terminals 12 and 13 may be arranged on the same side of the peripheral edge of the exterior member 20, and the valve device may be arranged on a side other than the side on which the electrode terminals 12 and 13 are arranged.

　また、蓄電デバイスパック５の外装容器６を温度調整機能を有した載置部材上に載置してもよい。例えば、載置部材を金属プレートにより形成して蓄電デバイスパック５の熱を放熱し、蓄電デバイス１０の温度上昇を抑制することができる。この時、載置部材に循環水を流通してもよい。また、蓄電デバイス１０が全固体電池等の場合に載置部材にヒータを設け、ヒータのオンオフによって蓄電デバイス１０を適温に維持してもよい。 Further, the outer container 6 of the power storage device pack 5 may be placed on a mounting member having a temperature adjusting function. For example, the mounting member can be formed of a metal plate to dissipate heat from the power storage device pack 5 and suppress a temperature rise of the power storage device 10. At this time, circulating water may be circulated to the mounting member. Further, when the power storage device 10 is an all-solid-state battery or the like, a heater may be provided on the mounting member, and the power storage device 10 may be maintained at an appropriate temperature by turning the heater on and off.

　また、蓄電デバイスパック５の外装容器６を液体吸収材により形成される載置部材上に載置してもよい。例えば、載置部材を不織布により形成し、蓄電デバイスパック５から電解液が漏れた際に載置部材により吸収することができる。 Further, the outer container 6 of the power storage device pack 5 may be placed on a mounting member formed of a liquid absorbent material. For example, the mounting member is made of a non-woven fabric, and when the electrolytic solution leaks from the power storage device pack 5, it can be absorbed by the mounting member.

　また、駆動モータ３に電力を供給する蓄電デバイス１０が二次電池から成るが、電気二重層コンデンサ（ＥＤＬＣ）、リチウムイオンキャパシタ等のキャパシタであってもよい。蓄電デバイス１０がキャパシタの場合は、キャパシタにおける化学反応に起因して外装部材２０内においてガスが発生し得る。 Further, although the power storage device 10 for supplying electric power to the drive motor 3 is composed of a secondary battery, it may be a capacitor such as an electric double layer capacitor (EDLC) or a lithium ion capacitor. When the power storage device 10 is a capacitor, gas may be generated in the exterior member 20 due to a chemical reaction in the capacitor.

　本発明によると、蓄電デバイスを搭載した電動自動車に広く利用可能である。 According to the present invention, it can be widely used in an electric vehicle equipped with a power storage device.

　　　１　　　電動自動車
　　　２　　　車輪
　　　３　　　駆動モータ
　　　５　　　蓄電デバイスパック
　　　６　　　外装容器
　　　８、９　保護カバー
　　１０　　　蓄電デバイス
　　１１　　　蓄電素子
　　１２、１３　電極端子
　　１２ａ、１３ａ　タブフィルム
　　１５、２５　包装材
　　１６、２６　収納部
　　１６ａ、２６ａ　開口部
　　１７、２７　フランジ部
　　１７ａ　　弁装置配置部
　　２０　　　外装部材
　　２０ａ　　折り線
　　２１　　　周縁シール部
　　２１ａ　　凹部
　　２２　　　梨地
　　２３　　　凹条部
　　２４　　　凸条部
　　３４　　　基材層
　　３６　　　バリア層
　　３８　　　熱接着性樹脂層
　　５０　　　弁装置
　　５１　　　筐体
　　５１ａ　　弁座
　　５１ｂ　　排気口
　　５１ｃ　　段差
　　５１ｄ　　流入口
　　５１ｅ　　通気路
　　５２　　　弁機能部
　　５３　　　Ｏリング
　　５４　　　ボール
　　５６　　　バネ
　　５５　　　バルブシート
　　５７　　　破壊弁
　　５７ａ　　溝部
　　５８　　　メンブレン
　　５９　　　筒部
　　６１、６１ａ、６１ｂ、６１ｃ　ガス通過部
　　６２　　　取付部
　　６２ａ　　内端
　　６３　　　通気路
　　６３ａ　　第１通路部
　　６３ｂ　　第２通路部
　　６３ｃ　　第３通路部
　　６４　　　翼状延端部
　　６５　　　ピラー
　　６６　　　凸条部
　　６８　　　第１翼状部
　　６９　　　第２翼状部
　　７０　　　挿入部
　　７２　　　平行部
　　８０　　　ヒートシール装置
　　８１　　　基部
　　８２　　　ヒートシールヘッド
　　８２ａ　　凸条部
　　８２ｂ　　梨地
　　８３　　　加熱部
　　９１　　　治具
　　９２　　　把持部
　　９３　　　ヒートシールバー
　　Ｋ１～Ｋ３　ライン
　　Ｐ１　　　外側端縁
　　Ｐ２、Ｐ３　内側端縁
　　Ｑ１　　　第１平面
　　Ｑ２　　　第２平面
　　Ｑ３、Ｑ４　湾曲面
　　Ｓ１、Ｓ２、Ｓ３　空間 1 Electric vehicle 2 Wheels 3 Drive motor 5 Power storage device pack 6 Exterior container 8, 9 Protective cover 10 Power storage device 11 Power storage element 12, 13 Electrode terminal 12a, 13a Tab film 15, 25 Packaging material 16, 26 Storage part 16a, 26a Opening Parts 17, 27 Flange part 17a Valve device placement part 20 Exterior member 20a Folded line 21 Peripheral seal part 21a Recessed 22 Pear-skin 23 Concave part 24 Convex part 34 Base material layer 36 Barrier layer 38 Thermal adhesive resin layer 50 Valve device 51 Housing 51a Valve seat 51b Exhaust port 51c Step 51d Inflow port 51e Ventilation passage 52 Valve function part 53 O-ring 54 Ball 56 Spring 55 Valve seat 57 Destruction valve 57a Groove 58 Membrane 59 Cylinder 61, 61a, 61b, 61c Gas passage 62 Mounting part 62a Inner end 63 Ventilation passage 63a First passage part 63b Second passage part 63c Third passage part 64 Wing-shaped extension part 65 Pillar 66 Convex part 68 First wing-like part 69 Second wing-like part 70 Insertion part 72 Parallel Part 80 Heat seal device 81 Base 82 Heat seal head 82a Convex part 82b Pear-skin 83 Heating part 91 Jigger 92 Grip part 93 Heat seal bar K1 to K3 Line P1 Outer edge P2, P3 Inner edge Q1 First plane Q2 No. 2 planes Q3, Q4 Curved surfaces S1, S2, S3 Space

Claims (71)

　熱接着性樹脂層を有する積層体の外装部材に蓄電素子を封入し、電動自動車に駆動源として搭載される蓄電デバイスにおいて、前記外装部材が対向する前記熱接着性樹脂層を互いに熱接着した周縁シール部と、前記周縁シール部に対して所定の深さで形成されるとともに前記蓄電素子を収納する収納部とを有し、前記収納部の深さ方向及び前記収納部の深さ方向に直交する第１方向が電動自動車の前後方向または左右方向に配置されるとともに、前記収納部の深さ方向及び前記第１方向に直交する第２方向が電動自動車の高さ方向に配置され、
　少なくとも部分的に前記周縁シール部において前記外装部材に取り付けられるともに、前記収納部と外部空間とを連通可能にする弁装置を更に備えたことを特徴とする蓄電デバイス。 In a power storage device in which a power storage element is enclosed in an exterior member of a laminate having a heat-adhesive resin layer and mounted as a drive source in an electric vehicle, a peripheral edge in which the heat-adhesive resin layers facing each other are heat-bonded to each other. It has a seal portion and a storage portion formed at a predetermined depth with respect to the peripheral seal portion and accommodating the power storage element, and is orthogonal to the depth direction of the storage portion and the depth direction of the storage portion. The first direction is arranged in the front-rear direction or the left-right direction of the electric vehicle, and the depth direction of the storage portion and the second direction orthogonal to the first direction are arranged in the height direction of the electric vehicle.
A power storage device, which is attached to the exterior member at least partially at the peripheral seal portion, and further includes a valve device that enables communication between the storage portion and an external space. 　前記弁装置は、前記外装部材の内部において発生したガスに起因して前記外装部材の内部の圧力が上昇した場合に該圧力を低下させる弁機構を内部に形成された第１部分と、前記収納部において発生したガスを前記弁機構に誘導する通気路を内部に形成された第２部分とを有し、
　前記第２部分の内端が前記周縁シール部の内側端縁から前記収納部に向かう方向に突出することを特徴とする請求項１に記載の蓄電デバイス。 The valve device includes a first portion in which a valve mechanism for reducing the pressure inside the exterior member when the pressure inside the exterior member rises due to gas generated inside the exterior member is formed therein, and the storage. It has a second portion formed inside with a ventilation path for guiding the gas generated in the portion to the valve mechanism.
The power storage device according to claim 1, wherein the inner end of the second portion projects from the inner edge of the peripheral edge seal portion in a direction toward the storage portion. 　前記収納部が前記周縁シール部の前記内側端縁よりも内側に配置され、前記第２部分の内端が前記収納部の外側端縁よりも内側に位置することを特徴とする請求項２に記載の蓄電デバイス。 2. The second aspect of the present invention is characterized in that the storage portion is arranged inside the inner edge of the peripheral seal portion, and the inner end of the second portion is located inside the outer edge of the storage portion. The power storage device described. 　前記通気路の延びる方向に沿って視たときに、前記第１部分の外形は前記第２部分の外形から前記収納部の深さ方向においてはみ出していることを特徴とする請求項２または請求項３に記載の蓄電デバイス。 2. Claim 2 or claim, wherein the outer shape of the first portion protrudes from the outer shape of the second portion in the depth direction of the storage portion when viewed along the extending direction of the ventilation path. The power storage device according to 3. 　前記第１部分は前記周縁シール部の外側端縁よりも外側に位置することを特徴とする請求項２～請求項４のいずれかに記載の蓄電デバイス。 The power storage device according to any one of claims 2 to 4, wherein the first portion is located outside the outer edge of the peripheral edge seal portion. 　前記第１部分は前記第２部分よりも前記通気路の延びる方向に直交する断面における断面積が大きいことを特徴とする請求項２～請求項５のいずれかに記載の蓄電デバイス。 The power storage device according to any one of claims 2 to 5, wherein the first portion has a larger cross-sectional area in a cross section orthogonal to the extending direction of the air passage than the second portion. 　前記弁装置は、前記外装部材の内部において発生したガスに起因して前記外装部材の内部の圧力が上昇した場合に該圧力を低下させる弁機構を内部に形成された第１部分と、前記収納部において発生したガスを前記弁機構に誘導する通気路を内部に形成された第２部分とを有し、
　前記第１部分は前記周縁シール部の外側の端縁よりも外側に位置しており、前記第２部分の少なくとも一部は前記周縁シール部において前記熱接着性樹脂層に挟まれ、
　前記収納部の深さ方向において、前記第１部分の長さは前記第２部分の長さよりも長く、前記第１部分と前記第２部分との境界には段差が形成されていることを特徴とする請求項１に記載の蓄電デバイス。 The valve device includes a first portion in which a valve mechanism for reducing the pressure inside the exterior member when the pressure inside the exterior member rises due to gas generated inside the exterior member is formed therein, and the storage. It has a second portion formed inside with a ventilation path for guiding the gas generated in the portion to the valve mechanism.
The first portion is located outside the outer edge of the peripheral edge seal portion, and at least a part of the second portion is sandwiched between the thermosetting resin layers in the peripheral edge seal portion.
In the depth direction of the storage portion, the length of the first portion is longer than the length of the second portion, and a step is formed at the boundary between the first portion and the second portion. The power storage device according to claim 1. 　前記第１方向の前記第２部分の長さは、前記収納部の深さ方向の前記第２部分の長さよりも長いことを特徴とする請求項７に記載の蓄電デバイス。 The power storage device according to claim 7, wherein the length of the second portion in the first direction is longer than the length of the second portion in the depth direction of the storage portion. 　前記弁装置は、前記外装部材の内部において発生したガスに起因して前記外装部材の内部の圧力が上昇した場合に該圧力を低下させる弁機構を内部に形成された第１部分と、前記収納部において発生したガスを前記弁機構に誘導する通気路を内部に形成された第２部分とを有し、
　前記第１部分は前記周縁シール部の外側の端縁よりも外側に位置しており、前記第２部分の少なくとも一部は前記周縁シール部において前記熱接着性樹脂層に挟まれ、
　前記第１方向の前記第２部分の長さは、前記収納部の深さ方向の前記第２部分の長さよりも長いことを特徴とする請求項１に記載の蓄電デバイス。 The valve device includes a first portion in which a valve mechanism for reducing the pressure inside the exterior member when the pressure inside the exterior member rises due to gas generated inside the exterior member is formed therein, and the storage. It has a second portion formed inside with a ventilation path for guiding the gas generated in the portion to the valve mechanism.
The first portion is located outside the outer edge of the peripheral edge seal portion, and at least a part of the second portion is sandwiched between the thermosetting resin layers in the peripheral edge seal portion.
The power storage device according to claim 1, wherein the length of the second portion in the first direction is longer than the length of the second portion in the depth direction of the storage portion. 　前記弁装置は、前記外装部材の内部において発生したガスに起因して前記外装部材の内部の圧力が上昇した場合に該圧力を低下させる弁機構を内部に形成された第１部分と、前記収納部において発生したガスを前記弁機構に誘導する通気路を内部に形成された第２部分とを有し、
　前記第１部分は前記周縁シール部の外側の端縁よりも外側に位置しており、前記第２部分の少なくとも一部は前記周縁シール部において前記熱接着性樹脂層に挟まれ、
　前記第２部分は前記第１方向の端部に近づくほど薄く形成された翼状延端部を有することを特徴とする請求項１に記載の蓄電デバイス。 The valve device includes a first portion in which a valve mechanism for reducing the pressure inside the exterior member when the pressure inside the exterior member rises due to gas generated inside the exterior member is formed therein, and the storage. It has a second portion formed inside with a ventilation path for guiding the gas generated in the portion to the valve mechanism.
The first portion is located outside the outer edge of the peripheral edge seal portion, and at least a part of the second portion is sandwiched between the thermosetting resin layers in the peripheral edge seal portion.
The power storage device according to claim 1, wherein the second portion has a wing-shaped extending end portion formed thinner toward the end portion in the first direction. 　前記弁装置は、前記外装部材の内部において発生したガスに起因して前記外装部材の内部の圧力が上昇した場合に該圧力を低下させる弁機構を内部に形成された第１部分と、前記収納部において発生したガスを前記弁機構に誘導する通気路を内部に形成された第２部分とを有し、
　前記第１部分は前記周縁シール部の外側の端縁よりも外側に位置しており、前記第２部分の少なくとも一部は前記周縁シール部において前記熱接着性樹脂層に挟まれ、
　前記第２部分の外表面には、周方向に延びる凸条部が少なくとも１つ形成されていることを特徴とする請求項１に記載の蓄電デバイス。 The valve device includes a first portion in which a valve mechanism for reducing the pressure inside the exterior member when the pressure inside the exterior member rises due to gas generated inside the exterior member is formed therein, and the storage. It has a second portion formed inside with a ventilation path for guiding the gas generated in the portion to the valve mechanism.
The first portion is located outside the outer edge of the peripheral edge seal portion, and at least a part of the second portion is sandwiched between the thermosetting resin layers in the peripheral edge seal portion.
The power storage device according to claim 1, wherein at least one convex portion extending in the circumferential direction is formed on the outer surface of the second portion. 　前記第１方向の前記通気路の長さは、前記収納部の深さ方向の前記通気路の長さよりも長いことを特徴とする請求項１０または請求項１１に記載の蓄電デバイス。 The power storage device according to claim 10 or 11, wherein the length of the ventilation path in the first direction is longer than the length of the ventilation path in the depth direction of the storage portion. 　前記通気路の断面形状は円形であることを特徴とする請求項７～請求項１２のいずれかに記載の蓄電デバイス。 The power storage device according to any one of claims 7 to 12, wherein the cross-sectional shape of the ventilation path is circular. 　前記第２部分において、前記第１部分側とは反対側の端部の外周側の角が丸みを帯びていることを特徴とする請求項７～請求項１３のいずれかに記載の蓄電デバイス。 The power storage device according to any one of claims 7 to 13, wherein in the second part, the corners on the outer peripheral side of the end portion opposite to the first part side are rounded. 　前記第２部分は、前記通気路内に形成されたピラーを有することを特徴とする請求項７～請求項１４のいずれかに記載の蓄電デバイス。 The power storage device according to any one of claims 7 to 14, wherein the second portion has a pillar formed in the air passage. 　前記第２部分の外表面は梨地であることを特徴とする請求項７～請求項１５のいずれかに記載の蓄電デバイス。 The power storage device according to any one of claims 7 to 15, wherein the outer surface of the second portion is satin finished. 　前記第２部分は前記通気路の中心軸に直交する断面の外形を多角形に形成され、前記多角形の角が丸みを帯びていることを特徴とする請求項７～請求項１６のいずれかに記載の蓄電デバイス。 Any of claims 7 to 16, wherein the second portion has a polygonal outer shape of a cross section orthogonal to the central axis of the air passage, and the corners of the polygon are rounded. The power storage device described in. 　前記第１部分及び前記第２部分の少なくとも一方の外表面の少なくとも一部に平面が形成されていることを特徴とする請求項７～請求項１７のいずれかに記載の蓄電デバイス。 The power storage device according to any one of claims 7 to 17, wherein a flat surface is formed on at least a part of the outer surface of at least one of the first portion and the second portion. 　前記第１部分及び前記第２部分は異なる材料で構成されており、前記第１部分の材料の融点が前記第２部分の材料の融点よりも高いことを特徴とする請求項７～請求項１８のいずれかに記載の蓄電デバイス。 Claims 7 to 18 are characterized in that the first portion and the second portion are composed of different materials, and the melting point of the material of the first portion is higher than the melting point of the material of the second portion. The power storage device according to any one of. 　前記弁装置は、前記外装部材の内部において発生したガスに起因して前記外装部材の内部の圧力が上昇した場合に該圧力を低下させる弁機構を内部に形成された第１部分と、前記収納部において発生したガスを前記弁機構に誘導する通気路を内部に形成された第２部分とを有し、
　前記弁装置の内端は前記収納部の外側端縁よりも外側に位置し、前記通気路の延びる方向に沿って視たときに、前記第１部分の外形は前記第２部分の外形から前記収納部の深さ方向においてはみ出していることを特徴とする請求項１に記載の蓄電デバイス。 The valve device includes a first portion in which a valve mechanism for reducing the pressure inside the exterior member when the pressure inside the exterior member rises due to gas generated inside the exterior member is formed therein, and the storage. It has a second portion formed inside with a ventilation path for guiding the gas generated in the portion to the valve mechanism.
The inner end of the valve device is located outside the outer edge of the accommodating portion, and when viewed along the extending direction of the air passage, the outer shape of the first part is the same as the outer shape of the second part. The power storage device according to claim 1, wherein the storage unit protrudes in the depth direction. 　前記弁装置は、前記外装部材の内部において発生したガスに起因して前記外装部材の内部の圧力が上昇した場合に該圧力を低下させる弁機構を内部に形成された第１部分と、前記収納部において発生したガスを前記弁機構に誘導する通気路を内部に形成された第２部分とを有し、
　前記弁装置の内端は前記収納部の外側端縁よりも外側に位置し、前記第１部分は前記第２部分よりも前記通気路の延びる方向に直交する断面における断面積が大きいことを特徴とする請求項１に記載の蓄電デバイス。 The valve device includes a first portion in which a valve mechanism for reducing the pressure inside the exterior member when the pressure inside the exterior member rises due to gas generated inside the exterior member is formed therein, and the storage. It has a second portion formed inside with a ventilation path for guiding the gas generated in the portion to the valve mechanism.
The inner end of the valve device is located outside the outer edge of the storage portion, and the first portion has a larger cross-sectional area than the second portion in a cross section orthogonal to the extending direction of the air passage. The power storage device according to claim 1. 　前記通気路の延びる方向に沿って視たときに、前記第１部分の外形は前記第２部分の外形から前記収納部の深さ方向においてはみ出していることを特徴とする請求項２１に記載の蓄電デバイス。 21. The aspect of claim 21, wherein the outer shape of the first portion protrudes from the outer shape of the second portion in the depth direction of the storage portion when viewed along the extending direction of the ventilation path. Power storage device. 　前記弁装置の内端は、少なくとも前記周縁シール部の内側端縁まで達していることを特徴とする請求項２０～請求項２２のいずれかに記載の蓄電デバイス。 The power storage device according to any one of claims 20 to 22, wherein the inner end of the valve device reaches at least the inner end edge of the peripheral edge seal portion. 　前記第１部分は前記周縁シール部の外側端縁よりも外側に位置することを特徴とする請求項２０～請求項２３のいずれかに記載の蓄電デバイス。 The power storage device according to any one of claims 20 to 23, wherein the first portion is located outside the outer edge of the peripheral edge seal portion. 　前記弁装置の内端は、前記周縁シール部の内側端縁から前記収納部に向かって突出していることを特徴とする請求項２０～請求項２４のいずれかに記載の蓄電デバイス。 The power storage device according to any one of claims 20 to 24, wherein the inner end of the valve device projects from the inner end edge of the peripheral edge seal portion toward the storage portion. 　前記周縁シール部の内側端縁は前記弁装置の近傍に位置して前記弁装置と交差する第１ラインと、前記周縁シール部の内側端縁の延びる方向に沿って前記第１ラインの両側にそれぞれ隣接する第２ライン及び第３ラインとを含み、前記第１ラインは、前記第２ライン及び前記第３ラインよりも外側に位置することを特徴とする請求項２０～請求項２５のいずれかに記載の蓄電デバイス。 The inner edge of the peripheral seal portion is located on both sides of the first line located near the valve device and intersecting the valve device, and along the extending direction of the inner edge of the peripheral seal portion. Any of claims 20 to 25, which includes a second line and a third line adjacent to each other, wherein the first line is located outside the second line and the third line. The power storage device described in. 　前記弁装置は、前記周縁シール部の外側の端縁よりも外側に位置している外側部分と、前記周縁シール部において前記熱接着性樹脂層に挟まれている取付部とを含み、前記周縁シール部は、前記取付部を前記熱接着性樹脂層によって挟む挟持部分の外表面に凹凸を形成されていることを特徴とする請求項１に記載の蓄電デバイス。 The valve device includes an outer portion located outside the outer edge of the peripheral edge seal portion and a mounting portion sandwiched between the thermosetting resin layers in the peripheral edge seal portion, and the peripheral edge thereof. The power storage device according to claim 1, wherein the seal portion has irregularities formed on the outer surface of the sandwiching portion that sandwiches the mounting portion by the thermosetting resin layer. 　前記凹凸は、前記挟持部分の外表面において前記弁装置の周方向に延びる凹条部によって構成されており、前記凹条部の深さは、０．０５ｍｍ～０．１ｍｍであることを特徴とする請求項２７に記載の蓄電デバイス。 The unevenness is formed by a concave portion extending in the circumferential direction of the valve device on the outer surface of the sandwiched portion, and the depth of the concave portion is 0.05 mm to 0.1 mm. 27. The power storage device according to claim 27. 　前記周縁シール部の一面に設けられた前記凹条部の位置と、他面に設けられた前記凹条部の位置とが、前記収納部の深さ方向に重ならないことを特徴とする請求項２８に記載の蓄電デバイス。 The claim is characterized in that the position of the concave portion provided on one surface of the peripheral edge seal portion and the position of the concave portion provided on the other surface do not overlap in the depth direction of the storage portion. 28. The power storage device. 　前記凹凸は、前記挟持部分の外表面に形成された梨地によって構成されており、前記梨地の表面粗さＲａは、１μｍ～２０μｍであることを特徴とする請求項２７に記載の蓄電デバイス。 The power storage device according to claim 27, wherein the unevenness is formed of a satin finish formed on the outer surface of the sandwiched portion, and the surface roughness Ra of the satin finish is 1 μm to 20 μm. 　前記周縁シール部の一面に設けられた前記凹凸は、第１凹部と、前記第１凹部よりも前記収納部の深さ方向の外側に突出した第１凸部とを含み、
　前記周縁シール部の他面に設けられた前記凹凸は、第２凹部と、前記第２凹部よりも前記収納部の深さ方向の外側に突出した第２凸部とを含み、
　前記第１凹部の底部及び前記第２凹部の底部が丸みを帯びていることを特徴とする請求項２７～請求項３０のいずれかに記載の蓄電デバイス。 The unevenness provided on one surface of the peripheral edge seal portion includes a first concave portion and a first convex portion that protrudes outward from the first concave portion in the depth direction of the storage portion.
The unevenness provided on the other surface of the peripheral edge seal portion includes a second concave portion and a second convex portion that protrudes outward from the second concave portion in the depth direction of the storage portion.
The power storage device according to any one of claims 27 to 30, wherein the bottom portion of the first recess and the bottom portion of the second recess are rounded. 　前記弁装置は、前記外装部材の内部において発生したガスを前記外装部材の外部へ排出する通気路が形成された筐体と、前記筐体に保持されるとともに前記外装部材の内部において発生した前記ガスに起因して前記外装部材の内圧が上昇した場合に前記ガスを前記通気路を介して前記外装部材の外部へ通過させる弁機構とを有し、前記筐体の外周面上には前記外装部材の外側に配される平行な第１平面及び第２平面が設けられることを特徴とする請求項１に記載の蓄電デバイス。 The valve device includes a housing in which a ventilation path for discharging gas generated inside the exterior member to the outside of the exterior member is formed, and the valve device held in the housing and generated inside the exterior member. It has a valve mechanism that allows the gas to pass to the outside of the exterior member through the air passage when the internal pressure of the exterior member rises due to the gas, and the exterior is on the outer peripheral surface of the housing. The power storage device according to claim 1, wherein a parallel first plane and a second plane arranged on the outside of the member are provided. 　前記筐体は、前記外装部材に固定される取付部と、前記外装部材の外側に配置されて前記弁機構を保持する弁機能部と、前記取付部と前記弁機能部との間に配置されて前記第１平面及び前記第２平面を設けられる平行部とを有することを特徴とする請求項３２に記載の蓄電デバイス。 The housing is arranged between a mounting portion fixed to the exterior member, a valve function portion arranged outside the exterior member and holding the valve mechanism, and the mounting portion and the valve function portion. 32. The power storage device according to claim 32, further comprising a first plane and a parallel portion provided with the second plane. 　前記筐体は、前記外装部材に固定される取付部と、前記外装部材の外側に配置されて前記弁機構を保持する弁機能部と、前記弁機能部の外側に配置されて前記第１平面及び前記第２平面を設けられる平行部とを有することを特徴とする請求項３２に記載の蓄電デバイス。 The housing has a mounting portion fixed to the exterior member, a valve function portion arranged outside the exterior member to hold the valve mechanism, and a first plane arranged outside the valve function portion. The power storage device according to claim 32, further comprising a parallel portion provided with the second plane. 　前記筐体は、前記外装部材に固定される取付部と、前記外装部材の外側に配置されて前記弁機構を保持するとともに前記第１平面及び前記第２平面を設けられる弁機能部とを有することを特徴とする請求項３２に記載の蓄電デバイス。 The housing has a mounting portion fixed to the exterior member, and a valve function portion arranged outside the exterior member to hold the valve mechanism and to provide the first plane and the second plane. 32. The power storage device according to claim 32. 　前記筐体は、前記外装部材に固定されて前記弁機構を保持する取付部を有し、前記第１平面及び前記第２平面が前記外装部材の外側の前記筐体上に配されることを特徴とする請求項３２に記載の蓄電デバイス。 The housing has a mounting portion fixed to the exterior member to hold the valve mechanism, and the first plane and the second plane are arranged on the housing outside the exterior member. The power storage device according to claim 32. 　前記取付部の軸方向に垂直な断面形状が非円形であることを特徴とする請求項３３～請求項３６のいずれかに記載の蓄電デバイス。 The power storage device according to any one of claims 33 to 36, wherein the cross-sectional shape perpendicular to the axial direction of the mounting portion is non-circular. 　前記取付部は、中央部から前記周縁シール部に沿った第１方向に向かうほど薄く形成された第１翼状部と、前記第１方向と反対の第２方向に向かうほど薄く形成された第２翼状部とを有することを特徴とする請求項３３～請求項３７のいずれかに記載の蓄電デバイス。 The attachment portion has a first wing-shaped portion formed thinner toward the first direction along the peripheral edge seal portion from the central portion, and a second wing-shaped portion formed thinner toward the second direction opposite to the first direction. The power storage device according to any one of claims 33 to 37, which comprises a wing-shaped portion. 　前記第１平面及び前記第２平面は、前記第１方向及び前記第２方向に平行または垂直であることを特徴とする請求項３８に記載の蓄電デバイス。 The power storage device according to claim 38, wherein the first plane and the second plane are parallel or perpendicular to the first direction and the second direction. 　前記弁装置は、前記外装部材に取り付けられる取付部と、前記外装部材の内部において発生したガスに起因して前記外装部材の内部の圧力が上昇した場合に該圧力を低下させるように構成される弁機能部と、前記取付部と前記弁機能部との間に設けられるとともに前記取付部内を通過したガスを前記弁機能部内へ通過させるように構成されたガス通過部とを有し、前記弁機能部が前記外装部材の外周よりも外側に位置することを特徴とする請求項１に記載の蓄電デバイス。 The valve device is configured to decrease the pressure inside the exterior member when the pressure inside the exterior member increases due to the attachment portion attached to the exterior member and the gas generated inside the exterior member. The valve has a valve function portion and a gas passing portion provided between the mounting portion and the valve function portion and configured to allow gas that has passed through the mounting portion to pass into the valve function portion. The power storage device according to claim 1, wherein the functional unit is located outside the outer periphery of the exterior member. 　前記ガス通過部の長さが１０ｍｍ以上であることを特徴とする請求項４０に記載の蓄電デバイス。 The power storage device according to claim 40, wherein the length of the gas passing portion is 10 mm or more. 　前記ガス通過部が曲げ伸ばし可能な柔軟性を備えていることを特徴とする請求項４０または請求項４１に記載の蓄電デバイス。 The power storage device according to claim 40 or 41, wherein the gas passing portion has flexibility that allows bending and stretching. 　前記ガス通過部が内部に乾燥剤を保持することを特徴とする請求項４０～請求項４２のいずれかに記載の蓄電デバイス。 The power storage device according to any one of claims 40 to 42, wherein the gas passing portion holds a desiccant inside. 　２５℃環境において、ＪＩＳ　Ｚ２３３１：２００６の「ヘリウム漏れ試験方法」における「真空吹付け法（スプレー法）」に規定された方法に準拠して測定される、前記弁装置の二次側から一次側へのヘリウムリーク量が５．０×１０-11Ｐａ・ｍ3／ｓｅｃ以上、５．０×１０-6Ｐａ・ｍ3／ｓｅｃ以下であることを特徴とする請求項４０～請求項４３のいずれかに記載の蓄電デバイス。 In a 25 ° C environment, the secondary side to the primary side of the valve device is measured in accordance with the method specified in the "vacuum spray method (spray method)" in the "helium leakage test method" of JIS Z2331: 2006. 40 to 43, wherein the amount of helium leaked to is 5.0 × 10 -11 Pa · m 3 / sec or more and 5.0 × 10 -6 Pa · m 3 / sec or less. The power storage device according to any one. 　前記外装部材が前記収納部の深さ方向から見て略矩形を有し、前記第２方向の一端の底辺を除く３辺のいずれかに前記弁装置を取り付けられることを特徴とする請求項１～請求項４４のいずれかに記載の蓄電デバイス。 Claim 1 is characterized in that the exterior member has a substantially rectangular shape when viewed from the depth direction of the storage portion, and the valve device can be attached to any of three sides excluding the bottom of one end in the second direction. The power storage device according to any one of claims 44. 　前記外装部材が第１包装材及び第２包装材により形成され、前記積層体は、少なくとも、基材層、バリア層及び前記熱接着性樹脂層をこの順に有し、前記第１包装材と前記第２包装材とは、前記熱接着性樹脂層が互いに対向するように配置されていることを特徴とする請求項１～請求項４５のいずれかに記載の蓄電デバイス。 The exterior member is formed of a first packaging material and a second packaging material, and the laminate has at least a base material layer, a barrier layer, and the thermosetting resin layer in this order, and the first packaging material and the said The power storage device according to any one of claims 1 to 45, wherein the second packaging material is arranged so that the thermosetting resin layers face each other. 　前記収納部の前記第１方向の長さが前記第２方向の長さよりも大きいことを特徴とする請求項１～請求項４６のいずれかに記載の蓄電デバイス。 The power storage device according to any one of claims 1 to 46, wherein the length of the storage portion in the first direction is larger than the length in the second direction. 　前記収納部の前記第１方向の長さが前記第２方向の長さの２倍～３０倍であることを特徴とする請求項４７に記載の蓄電デバイス。 The power storage device according to claim 47, wherein the length of the storage portion in the first direction is 2 to 30 times the length in the second direction. 　前記第１方向に延びる前記周縁シール部が折曲により前記収納部の周壁上に重ねられることを特徴とする請求項１～請求項４８のいずれかに記載の蓄電デバイス。 The power storage device according to any one of claims 1 to 48, wherein the peripheral seal portion extending in the first direction is overlapped on the peripheral wall of the storage portion by bending. 　前記外装部材の流れ方向が前記第１方向に直交することを特徴とする請求項４９に記載の蓄電デバイス。 The power storage device according to claim 49, wherein the flow direction of the exterior member is orthogonal to the first direction. 　前記蓄電素子が第１電極端子及び第２電極端子を有し、前記第１電極端子及び前記第２電極端子が前記第２方向に延びる前記周縁シール部から突出することを特徴とする請求項１～請求項５０のいずれかに記載の蓄電デバイス。 1. A claim 1 in which the power storage element has a first electrode terminal and a second electrode terminal, and the first electrode terminal and the second electrode terminal project from the peripheral edge seal portion extending in the second direction. The power storage device according to any one of claims 50. 　前記第１電極端子及び前記第２電極端子が前記第１方向に対向する前記周縁シール部からそれぞれ突出することを特徴とする請求項５１に記載の蓄電デバイス。 The power storage device according to claim 51, wherein the first electrode terminal and the second electrode terminal project from the peripheral seal portion facing the first direction, respectively. 　請求項１～請求項５２のいずれかに記載の蓄電デバイスを前記収納部の深さ方向に複数並設して外装容器に収納し、電動自動車に搭載される蓄電デバイス集合体において、複数の前記蓄電デバイスを並設した方向の長さが前記第２方向の長さよりも大きいことを特徴とする蓄電デバイス集合体。 A plurality of the power storage devices according to any one of claims 1 to 52 are arranged side by side in the depth direction of the storage portion and stored in an outer container, and the plurality of power storage devices are mounted on an electric vehicle. An assembly of power storage devices, characterized in that the length in the direction in which the power storage devices are arranged side by side is larger than the length in the second direction. 　前記外装容器が載置される載置部材を備え、前記載置部材が温度調整機能を有することを特徴とする請求項５３に記載の蓄電デバイス集合体。 The storage device assembly according to claim 53, which comprises a mounting member on which the outer container is mounted, and the previously described mounting member has a temperature adjusting function. 　前記外装容器が載置される載置部材を備え、前記載置部材が液体吸収材により形成されることを特徴とする請求項５３に記載の蓄電デバイス集合体。 The storage device assembly according to claim 53, further comprising a mounting member on which the outer container is mounted, wherein the mounting member is formed of a liquid absorbent material. 　請求項５３～請求項５５のいずれかに記載の蓄電デバイス集合体と、前記蓄電デバイス集合体から電力供給される駆動モータと、前記駆動モータにより駆動される車輪とを備え、前記蓄電デバイス集合体が車体底部に高さ方向に１段で配置されることを特徴とする電動自動車。 The power storage device assembly according to any one of claims 53 to 55, a drive motor to which power is supplied from the power storage device assembly, and wheels driven by the drive motor. Is an electric motor characterized by being arranged in one step in the height direction at the bottom of the vehicle body. 　電動自動車に駆動源として搭載される蓄電デバイスの製造方法において、熱接着性樹脂層を有する積層体により収納部を備えた外装部材を準備する工程と、前記収納部に蓄電素子を収納するとともに前記外装部材の周縁部を周縁シール部により接合して前記外装部材により包装する工程とを備え、前記収納部と外部空間とを連通可能にする弁装置が少なくとも部分的に前記周縁シール部において前記熱接着性樹脂層間に挟まれて前記外装部材に取り付けられ、
　前記収納部の深さ方向及び前記収納部の深さ方向に直交する第１方向が電動自動車の前後方向または左右方向に配置されるとともに、前記収納部の深さ方向及び前記第１方向に直交する第２方向が電動自動車の高さ方向に配置され、前記収納部の前記第１方向の長さが前記第２方向の長さよりも大きいことを特徴とする蓄電デバイスの製造方法。 In the method of manufacturing a power storage device mounted as a drive source in an electric vehicle, a step of preparing an exterior member having a storage portion by a laminate having a thermosetting resin layer, and a step of storing the power storage element in the storage portion and the above-mentioned A valve device comprising a step of joining the peripheral edge portion of the exterior member with the peripheral edge seal portion and packaging with the exterior member, and enabling communication between the storage portion and the external space, at least partially, heats the peripheral portion at the peripheral edge seal portion. It is sandwiched between adhesive resin layers and attached to the exterior member.
The first direction orthogonal to the depth direction of the storage portion and the depth direction of the storage portion is arranged in the front-rear direction or the left-right direction of the electric vehicle, and is orthogonal to the depth direction of the storage portion and the first direction. A method for manufacturing a power storage device, wherein the second direction is arranged in the height direction of the electric vehicle, and the length of the storage portion in the first direction is larger than the length in the second direction. 　前記弁装置は、前記収納部において発生したガスを前記外部空間へ排出する弁機構を内部に形成された第１部分と、前記収納部において発生したガスを前記弁機構に誘導する通気路を内部に形成された第２部分とを有し、
　前記第２部分の内端が前記周縁シール部の内側端縁から前記収納部に向かう方向に突出することを特徴とする請求項５７に記載の蓄電デバイスの製造方法。 The valve device has a first portion internally formed with a valve mechanism for discharging the gas generated in the storage portion to the external space, and a ventilation path for guiding the gas generated in the storage portion to the valve mechanism. Has a second part formed in
The method for manufacturing a power storage device according to claim 57, wherein the inner end of the second portion projects from the inner edge of the peripheral edge seal portion in a direction toward the storage portion. 　前記弁装置は、前記収納部において発生したガスを前記外部空間へ排出する弁機構を内部に形成された第１部分と、前記収納部において発生したガスを前記弁機構に誘導する通気路を内部に形成された第２部分とを有し、
　前記第１部分は前記周縁シール部の外側の端縁よりも外側に位置しており、前記第２部分の少なくとも一部は前記周縁シール部において前記熱接着性樹脂層に挟まれ、
　前記収納部の深さ方向において、前記第１部分の長さは前記第２部分の長さよりも長く、前記第１部分と前記第２部分との境界には段差が形成されていることを特徴とする請求項５７に記載の蓄電デバイスの製造方法。 The valve device has a first portion internally formed with a valve mechanism for discharging the gas generated in the storage portion to the external space, and a ventilation path for guiding the gas generated in the storage portion to the valve mechanism. Has a second part formed in
The first portion is located outside the outer edge of the peripheral edge seal portion, and at least a part of the second portion is sandwiched between the thermosetting resin layers in the peripheral edge seal portion.
In the depth direction of the storage portion, the length of the first portion is longer than the length of the second portion, and a step is formed at the boundary between the first portion and the second portion. The method for manufacturing a power storage device according to claim 57. 　前記弁装置は、前記収納部において発生したガスを前記外部空間へ排出する弁機構を内部に形成された第１部分と、前記収納部において発生したガスを前記弁機構に誘導する通気路を内部に形成された第２部分とを有し、
　前記第１部分は前記周縁シール部の外側の端縁よりも外側に位置しており、前記第２部分の少なくとも一部は前記周縁シール部において前記熱接着性樹脂層に挟まれ、
　前記第１方向の前記第２部分の長さは、前記収納部の深さ方向の前記第２部分の長さよりも長いことを特徴とする請求項５７に記載の蓄電デバイスの製造方法。 The valve device has a first portion internally formed with a valve mechanism for discharging the gas generated in the storage portion to the external space, and a ventilation path for guiding the gas generated in the storage portion to the valve mechanism. Has a second part formed in
The first portion is located outside the outer edge of the peripheral edge seal portion, and at least a part of the second portion is sandwiched between the thermosetting resin layers in the peripheral edge seal portion.
The method for manufacturing a power storage device according to claim 57, wherein the length of the second portion in the first direction is longer than the length of the second portion in the depth direction of the storage portion. 　前記弁装置は、前記収納部において発生したガスを前記外部空間へ排出する弁機構を内部に形成された第１部分と、前記収納部において発生したガスを前記弁機構に誘導する通気路を内部に形成された第２部分とを有し、
　前記第１部分は前記周縁シール部の外側の端縁よりも外側に位置しており、前記第２部分の少なくとも一部は前記周縁シール部において前記熱接着性樹脂層に挟まれ、
　前記第２部分は前記第１方向の端部に近づくほど薄く形成された翼状延端部を有することを特徴とする請求項５７に記載の蓄電デバイスの製造方法。 The valve device has a first portion internally formed with a valve mechanism for discharging the gas generated in the storage portion to the external space, and a ventilation path for guiding the gas generated in the storage portion to the valve mechanism. Has a second part formed in
The first portion is located outside the outer edge of the peripheral edge seal portion, and at least a part of the second portion is sandwiched between the thermosetting resin layers in the peripheral edge seal portion.
The method for manufacturing a power storage device according to claim 57, wherein the second portion has a wing-shaped extension portion that is formed thinner as it approaches the end portion in the first direction. 　前記弁装置は、前記収納部において発生したガスを前記外部空間へ排出する弁機構を内部に形成された第１部分と、前記収納部において発生したガスを前記弁機構に誘導する通気路を内部に形成された第２部分とを有し、
　前記第１部分は前記周縁シール部の外側の端縁よりも外側に位置しており、前記第２部分の少なくとも一部は前記周縁シール部において前記熱接着性樹脂層に挟まれ、
　前記第２部分の外表面には、周方向に延びる凸条部が少なくとも１つ形成されていることを特徴とする請求項５７に記載の蓄電デバイスの製造方法。 The valve device has a first portion internally formed with a valve mechanism for discharging the gas generated in the storage portion to the external space, and a ventilation path for guiding the gas generated in the storage portion to the valve mechanism. Has a second part formed in
The first portion is located outside the outer edge of the peripheral edge seal portion, and at least a part of the second portion is sandwiched between the thermosetting resin layers in the peripheral edge seal portion.
The method for manufacturing a power storage device according to claim 57, wherein at least one convex portion extending in the circumferential direction is formed on the outer surface of the second portion. 　前記弁装置は、前記収納部において発生したガスを前記外部空間へ排出する弁機構を内部に形成された第１部分と、前記収納部において発生したガスを前記弁機構に誘導する通気路を内部に形成された第２部分とを有し、前記弁装置の内端は前記収納部の外側端縁よりも外側に位置し、前記通気路の延びる方向に沿って視たときに、前記第１部分の外形は前記第２部分の外形から前記収納部の深さ方向においてはみ出していることを特徴とする請求項５７に記載の蓄電デバイスの製造方法。 The valve device has a first portion internally formed with a valve mechanism for discharging the gas generated in the storage portion to the external space, and a ventilation path for guiding the gas generated in the storage portion to the valve mechanism. The inner end of the valve device is located outside the outer edge of the accommodating portion, and when viewed along the extending direction of the air passage, the first portion is formed. The method for manufacturing a power storage device according to claim 57, wherein the outer shape of the portion protrudes from the outer shape of the second portion in the depth direction of the storage portion. 　前記弁装置は、前記収納部において発生したガスを前記外部空間へ排出する弁機構を内部に形成された第１部分と、前記収納部において発生したガスを前記弁機構に誘導する通気路を内部に形成された第２部分とを有し、前記弁装置の内端は前記収納部の外側端縁よりも外側に位置し、前記第１部分は前記第２部分よりも前記通気路の延びる方向に直交する断面における断面積が大きいことを特徴とする請求項５７に記載の蓄電デバイスの製造方法。 The valve device includes a first portion in which a valve mechanism for discharging gas generated in the storage portion to the external space is formed inside, and a ventilation path for guiding the gas generated in the storage portion to the valve mechanism. The inner end of the valve device is located outside the outer edge of the accommodating portion, and the first portion is in the direction in which the air passage extends from the second portion. The method for manufacturing a power storage device according to claim 57, wherein the cross-sectional area in a cross section orthogonal to is large. 　前記弁装置は、前記収納部において発生したガスを前記外部空間へ排出する弁機構と、前記弁機構を内部に形成された筐体とを有し、前記弁装置の内端は前記収納部の外側端縁よりも外側で前記周縁シール部の内側端縁まで達しており、前記筐体の内端部には前記弁機構の閉状態において前記収納部に連通する開口が形成されることを特徴とする請求項５７に記載の蓄電デバイスの製造方法。 The valve device has a valve mechanism for discharging gas generated in the storage portion to the external space and a housing in which the valve mechanism is formed inside, and the inner end of the valve device is the storage portion. It is characterized in that it reaches the inner edge of the peripheral edge seal portion on the outer side of the outer edge, and an opening communicating with the storage portion is formed in the inner end portion of the housing in a closed state of the valve mechanism. The method for manufacturing a power storage device according to claim 57. 　前記弁装置は、前記周縁シール部の外側の端縁よりも外側に位置している第１部分と、前記周縁シール部において前記熱接着性樹脂層に挟まれている第２部分とを含み、前記周縁シール部は、前記第２部分を前記熱接着性樹脂層によって挟む挟持部分の外表面に凹凸を形成されていることを特徴とする請求項５７に記載の蓄電デバイスの製造方法。 The valve device includes a first portion located outside the outer edge of the peripheral edge seal and a second portion sandwiched between the thermosetting resin layers in the peripheral seal. The method for manufacturing a power storage device according to claim 57, wherein the peripheral seal portion has irregularities formed on the outer surface of the sandwiching portion that sandwiches the second portion by the thermosetting resin layer. 　前記弁装置は、前記外装部材の内部において発生したガスを前記外装部材の外部へ排出する通気路が形成された筐体と、前記筐体に保持されるとともに前記外装部材の内部において発生した前記ガスに起因して前記外装部材の内圧が上昇した場合に前記ガスを前記通気路を介して前記外装部材の外部へ通過させる弁機構とを有し、前記筐体の外周面上には前記外装部材の外側に配される平行な第１平面及び第２平面が設けられることを特徴とする請求項５７に記載の蓄電デバイスの製造方法。 The valve device includes a housing in which a ventilation path for discharging gas generated inside the exterior member to the outside of the exterior member is formed, and the valve device held in the housing and generated inside the exterior member. It has a valve mechanism that allows the gas to pass to the outside of the exterior member through the air passage when the internal pressure of the exterior member rises due to the gas, and the exterior is on the outer peripheral surface of the housing. The method for manufacturing a power storage device according to claim 57, wherein parallel first planes and second planes arranged on the outside of the member are provided. 　前記弁装置は、前記外装部材に取り付けられる取付部と、前記外装部材の内部において発生したガスに起因して前記外装部材の内部の圧力が上昇した場合に該圧力を低下させるように構成される弁装置本体と、前記取付部と前記弁装置本体との間に設けられるとともに前記取付部内を通過したガスを前記弁装置本体内へ通過させるように構成されたガス通過部とを有し、前記弁装置本体が前記外装部材の外周よりも外側に位置することを特徴とする請求項５７に記載の蓄電デバイスの製造方法。 The valve device is configured to decrease the pressure inside the exterior member when the pressure inside the exterior member increases due to the attachment portion attached to the exterior member and the gas generated inside the exterior member. It has a valve device main body and a gas passing portion provided between the mounting portion and the valve device main body and configured to allow gas that has passed through the mounting portion to pass into the valve device main body. The method for manufacturing a power storage device according to claim 57, wherein the valve device main body is located outside the outer periphery of the exterior member. 　前記収納部の前記第１方向の長さが前記第２方向の長さの２倍～３０倍であることを特徴とする請求項５７～請求項６８のいずれかに記載の蓄電デバイスの製造方法。 The method for manufacturing a power storage device according to any one of claims 57 to 68, wherein the length of the storage portion in the first direction is 2 to 30 times the length in the second direction. .. 　前記外装部材により包装する工程が、前記熱接着性樹脂層の熱接着により前記外装部材を封止する周縁シール部を前記外装部材の周部に形成し、前記第２方向に延びる前記周縁シール部を折曲して前記収納部の周壁上に重ねることを特徴とする請求項５７～請求項６９のいずれかに記載の蓄電デバイスの製造方法。 In the step of packaging with the exterior member, the peripheral seal portion that seals the exterior member by thermal adhesion of the heat-adhesive resin layer is formed on the peripheral portion of the exterior member, and the peripheral seal portion extends in the second direction. The method for manufacturing a power storage device according to any one of claims 57 to 69, wherein the storage device is bent and stacked on the peripheral wall of the storage unit. 　前記外装部材の流れ方向に対して前記第１方向が直交することを特徴とする請求項７０に記載の蓄電デバイスの製造方法。 The method for manufacturing a power storage device according to claim 70, wherein the first direction is orthogonal to the flow direction of the exterior member.
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2025030173A (en) * 2023-08-23 2025-03-07 プライムプラネットエナジー＆ソリューションズ株式会社 Prismatic secondary battery
US12362398B2 (en) 2020-02-07 2025-07-15 24M Technologies, Inc. Divided energy electrochemical cell systems and methods of producing the same
US12381277B2 (en) 2020-06-17 2025-08-05 24M Technologies, Inc. Electrochemical cells with flame retardant mechanism and methods of producing the same

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113078409B (en) * 2021-04-20 2025-03-11 上海电气国轩新能源科技(苏州)有限公司 A disassembly-resistant shared power battery module structure

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0240871B2 (en) * 1983-04-30 1990-09-13 Kyosan Denki Kk
JPH04328241A (en) * 1991-04-30 1992-11-17 Fuji Photo Film Co Ltd Safety valve for sealed nonaqueous battery
JP2005222788A (en) * 2004-02-05 2005-08-18 Nissan Motor Co Ltd Seal part structure between laminate film and lead tab, laminate pack type lithium ion battery and method for manufacturing the same
WO2006098242A1 (en) * 2005-03-17 2006-09-21 Nec Corporation Film enclosed electric device and production method therefor
JP2012079521A (en) * 2010-09-30 2012-04-19 Honda Motor Co Ltd Battery for electric vehicle
KR20140003909A (en) * 2012-07-02 2014-01-10 박성찬 A battery which is improved damageability and repairability about low-speed impact for the electric vehicle
KR20140049737A (en) * 2012-10-18 2014-04-28 주식회사 엘지화학 Wrapping material for secondary battery
KR20140067246A (en) * 2012-11-26 2014-06-05 주식회사 엘지화학 Battery cell having nozzle member
CN204793061U (en) * 2015-05-29 2015-11-18 山东精工电子科技有限公司 Take soft package lithium -ion battery of air bleeding valve
CN105789518A (en) * 2016-04-06 2016-07-20 河南环宇赛尔新能源科技有限公司 Soft-package lithium ion battery with safety valve
JP2016152231A (en) * 2015-02-16 2016-08-22 有量科技股▲ふん▼有限公司 Exhaust structure for lithium battery
JP2016162491A (en) * 2015-02-26 2016-09-05 三井化学株式会社 Lithium ion battery
KR20190002992A (en) * 2017-06-30 2019-01-09 에스케이이노베이션 주식회사 Secondary cell

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0240871B2 (en) * 1983-04-30 1990-09-13 Kyosan Denki Kk
JPH04328241A (en) * 1991-04-30 1992-11-17 Fuji Photo Film Co Ltd Safety valve for sealed nonaqueous battery
JP2005222788A (en) * 2004-02-05 2005-08-18 Nissan Motor Co Ltd Seal part structure between laminate film and lead tab, laminate pack type lithium ion battery and method for manufacturing the same
WO2006098242A1 (en) * 2005-03-17 2006-09-21 Nec Corporation Film enclosed electric device and production method therefor
JP2012079521A (en) * 2010-09-30 2012-04-19 Honda Motor Co Ltd Battery for electric vehicle
KR20140003909A (en) * 2012-07-02 2014-01-10 박성찬 A battery which is improved damageability and repairability about low-speed impact for the electric vehicle
KR20140049737A (en) * 2012-10-18 2014-04-28 주식회사 엘지화학 Wrapping material for secondary battery
KR20140067246A (en) * 2012-11-26 2014-06-05 주식회사 엘지화학 Battery cell having nozzle member
JP2016152231A (en) * 2015-02-16 2016-08-22 有量科技股▲ふん▼有限公司 Exhaust structure for lithium battery
JP2016162491A (en) * 2015-02-26 2016-09-05 三井化学株式会社 Lithium ion battery
CN204793061U (en) * 2015-05-29 2015-11-18 山东精工电子科技有限公司 Take soft package lithium -ion battery of air bleeding valve
CN105789518A (en) * 2016-04-06 2016-07-20 河南环宇赛尔新能源科技有限公司 Soft-package lithium ion battery with safety valve
KR20190002992A (en) * 2017-06-30 2019-01-09 에스케이이노베이션 주식회사 Secondary cell

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US12362398B2 (en) 2020-02-07 2025-07-15 24M Technologies, Inc. Divided energy electrochemical cell systems and methods of producing the same
US12381277B2 (en) 2020-06-17 2025-08-05 24M Technologies, Inc. Electrochemical cells with flame retardant mechanism and methods of producing the same
JP2025030173A (en) * 2023-08-23 2025-03-07 プライムプラネットエナジー＆ソリューションズ株式会社 Prismatic secondary battery

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