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WO2024158045A1 - Bloc-batterie - Google Patents

Bloc-batterie Download PDF

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Publication number
WO2024158045A1
WO2024158045A1 PCT/JP2024/002341 JP2024002341W WO2024158045A1 WO 2024158045 A1 WO2024158045 A1 WO 2024158045A1 JP 2024002341 W JP2024002341 W JP 2024002341W WO 2024158045 A1 WO2024158045 A1 WO 2024158045A1
Authority
WO
WIPO (PCT)
Prior art keywords
battery
adhesive
recess
spacer
stacking direction
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/JP2024/002341
Other languages
English (en)
Japanese (ja)
Inventor
定之 青木
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.)
Vehicle Energy Japan Inc
Original Assignee
Vehicle Energy Japan Inc
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 Vehicle Energy Japan Inc filed Critical Vehicle Energy Japan Inc
Priority to JP2024573234A priority Critical patent/JPWO2024158045A1/ja
Publication of WO2024158045A1 publication Critical patent/WO2024158045A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • H01M10/64—Heating or cooling; Temperature control characterised by the shape of the cells
    • H01M10/647—Prismatic or flat cells, e.g. pouch cells
    • 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
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/658—Means for temperature control structurally associated with the cells by thermal insulation or shielding
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/209—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for prismatic or rectangular cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/262—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with fastening means, e.g. locks
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/262—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with fastening means, e.g. locks
    • H01M50/264—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with fastening means, e.g. locks for cells or batteries, e.g. straps, tie rods or peripheral frames
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/289—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/289—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs
    • H01M50/291—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs characterised by their shape
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/289—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs
    • H01M50/293—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs characterised by the material

Definitions

  • the present invention relates to a battery pack.
  • Battery packs that include multiple batteries and multiple holding members (spacers) that hold the multiple batteries have been known for some time.
  • Some battery packs have a configuration in which the batteries and holding members are bonded together with an adhesive (see Patent Document 1 and Patent Document 2).
  • a battery pack includes a plurality of stacked batteries including a charging/discharging element, a holding member that holds the batteries in the stacking direction of the batteries or along the stacking direction, and an adhesive that bonds the batteries to the holding member or the holding members to each other.
  • the holding member has at least one of a first surface that has an area that overlaps with the charging/discharging element in the stacking direction and has a concave recess that faces the batteries, and a second surface that faces the plurality of batteries along the stacking direction and has a concave recess that faces the batteries.
  • the adhesive is provided in the recess.
  • the present invention makes it possible to obtain a battery pack in which the adhesive strength between the battery and the holding member, or between the holding members themselves, is ensured.
  • FIG. 1 is a perspective view showing a battery pack 1 according to a first embodiment
  • 2 is a top view of the battery pack 1 of FIG. 1 with a bus bar holder 311 removed.
  • FIG. 2 is a perspective view showing a plurality of batteries 100 and a holding unit 200, with some of the components of the holding unit 200 exploded in the width direction Y and stacking direction X.
  • FIG. 4 is a perspective view showing the battery 100 and the holding unit 200 in a state where the first side plate 231, the second side plate 232 and the fastening bolt 241 are removed from FIG. 3 and the components thereof are disassembled in the stacking direction X.
  • FIG. FIG. 2 is a perspective view showing the busbar unit 300, the voltage detection unit 400, and the temperature measurement unit 500.
  • FIG. 2 is a perspective view showing a cell spacer 202 to which an adhesive 11 is applied and a battery 100.
  • 7 is a partial cross-sectional view showing a schematic diagram of an adhesive structure between the cell spacer 202 and the battery 100 in FIG. 6.
  • FIG. 4 is a partial cross-sectional view showing a schematic adhesion structure between a cell spacer 202 and a battery 100 according to a first modified example of the first embodiment.
  • FIG. 13 is a perspective view showing a cell spacer 202 to which an adhesive 13 is applied according to a second modified example of the first embodiment.
  • FIG. 13 is a perspective view showing a cell spacer 202 to which an adhesive 14 is applied according to a third modified example of the first embodiment.
  • FIG. 13 is a perspective view showing a cell spacer 204 to which an adhesive 15 is applied according to a fourth modified example of the first embodiment.
  • 12 is a partial cross-sectional view showing a schematic adhesion structure between the cell spacer 204 and the battery 100 in FIG. 11 .
  • FIG. 13 is a perspective view showing a cell spacer 205 to which an adhesive 16 is applied according to a fifth modified example of the first embodiment.
  • FIG. 13 is a perspective view showing a cell spacer 206 to which an adhesive 17 is applied according to a sixth modified example of the first embodiment.
  • FIG. 13 is a perspective view showing a cell spacer 207 to which an adhesive 18 is applied according to a seventh modified example of the first embodiment.
  • FIG. 13 is a perspective view showing a first side plate 233 to which an adhesive 19 is applied according to an eighth modified example of the first embodiment.
  • FIG. 6 is an exploded perspective view showing a battery pack 2 according to a second embodiment.
  • FIG. 11 is a perspective view showing a battery 110 to which adhesive 21 is applied and a cell spacer 208 that constitute a battery pack according to a third embodiment.
  • FIG. 13 is a perspective view showing a battery 120 to which an adhesive 22 has been applied and a cell spacer 208 according to a modified example of the third embodiment.
  • the stacking direction X, width direction Y, and height direction Z of the battery pack 1 will change.
  • the threads on the outer surface of the fastening bolt and the grooves on the inner surface of the insert nut are omitted from the illustration.
  • FIG. 1 (Configuration of battery pack 1 according to the first embodiment)
  • the configuration of a battery pack 1 according to a first embodiment will be described with reference to FIGS. 1 to 7.
  • FIG. 1 (Configuration of battery pack 1 according to the first embodiment)
  • FIG. 1 is a perspective view showing a battery pack 1 of the first embodiment.
  • FIG. 2 is a top view showing the battery pack 1 of FIG. 1 with the busbar holder 311 removed.
  • FIG. 3 is a perspective view showing a plurality of batteries 100 and a holding unit 200 with some of the components of the holding unit 200 disassembled in the width direction Y and the stacking direction X.
  • FIG. 4 is a perspective view showing the components of the battery 100 and the holding unit 200 disassembled in the stacking direction X with the first side plate 231, the second side plate 232, and the fastening bolt 241 removed from FIG. 3.
  • FIG. 5 is a perspective view showing the busbar unit 300, the voltage detection unit 400, and the temperature measurement unit 500.
  • FIG. 6 is a perspective view showing the cell spacer 202 to which the adhesive 11 is applied and the battery 100.
  • FIG. 7 is a partial cross-sectional view showing the adhesion structure of the cell spacer 202 and the battery 100 of FIG. 6.
  • the battery pack 1 is configured, for example, as a power source for operating a motor to run a vehicle.
  • the battery pack 1 may also be configured, for example, as a power source for operating electrical equipment mounted on the vehicle.
  • the battery pack 1 includes a plurality of batteries 100, a holding unit 200 that holds the plurality of batteries 100, and a bus bar unit 300 that electrically connects the plurality of batteries 100.
  • the battery pack 1 also includes a voltage detection unit 400 that detects the voltage of the batteries 100, and a temperature measurement unit 500 that measures the temperature of the batteries 100. The components included in the battery pack 1 are described below.
  • the batteries 100 shown in Figs. 1 to 4, 6 and 7 are stacked in a stacking direction X via a holding unit 200.
  • a plurality of stacked batteries 100 is referred to as a battery group 100G.
  • the battery 100 is formed of, for example, a lithium ion secondary battery.
  • the battery 100 includes a current collector and an electrolyte.
  • the battery 100 includes a container 101, a lid 102, a positive electrode terminal 103, a negative electrode terminal 104 and a safety valve 105. The components included in the battery 100 will be described below.
  • the battery 100 is formed in a rectangular parallelepiped shape.
  • a positive terminal 103 and a negative terminal 104 are provided on the upper surface 100a of the battery 100 along the stacking direction X.
  • the upper surface 100a corresponds to the upper surface of the battery 100 in FIG. 4.
  • the upper surface 100a is formed in a rectangular shape.
  • the length of the upper surface 100a along the width direction Y of the battery 100 is longer than the length of the upper surface 100a along the stacking direction X of the battery 100.
  • the upper surface 100a faces the busbar unit 300 shown in FIG. 1.
  • Two side surfaces 100b along the stacking direction X of the battery 100 face each other perpendicularly to the upper surface 100a.
  • the side surfaces 100b are formed in a rectangular shape.
  • the length of the side surfaces 100b along the height direction Z of the battery 100 is longer than the length of the side surfaces 100b along the stacking direction X of the battery 100.
  • the two main surfaces 100c of the battery 100 that face each other in the stacking direction X are in contact with the cell spacers 202 of the holding unit 200.
  • the current collector 100d of the battery 100 corresponds to a charging/discharging body to/from which electric power is input/output.
  • the current collector 100d of the battery 100 is configured by winding or stacking a positive electrode and a negative electrode with a separator interposed therebetween.
  • the current collector 100d has an active area that contributes to charging/discharging the battery 100, and an inactive area that does not contribute to charging/discharging the battery 100.
  • the active area is, for example, an area of the current collector 100d where the positive electrode active material of the positive electrode and the negative electrode active material of the negative electrode overlap along the stacking direction X of the assembled battery 1.
  • the inactive area is an area of the current collector 100d other than the active area.
  • the inactive area is, for example, an area of the current collector 100d where only the positive electrode current collecting foil and only the negative electrode current collecting foil overlap along the stacking direction X of the assembled battery 1.
  • the inactive area is the area of the current collector 100d where the positive electrode current collecting tab and the negative electrode current collecting tab overlap along the stacking direction X of the battery pack 1.
  • the container 101 of the battery 100 contains a current collector 100d and an electrolyte.
  • the lid 102 together with the container 101, seals the current collector 100d and the electrolyte.
  • the lid 102 is joined to the container 101.
  • the positive electrode terminal 103 and the negative electrode terminal 104 relay input and output of power between the current collector 100d and the electrical device.
  • the positive electrode terminal 103 and the negative electrode terminal 104 are attached to the lid 102.
  • the positive electrode terminal 103 of one battery 100 and the negative electrode terminal 104 of the other battery 100 that are adjacent along the stacking direction X face each other in the stacking direction X as shown in FIG. 4.
  • the safety valve 105 breaks outward from the battery 100 when the internal pressure of the battery 100 exceeds a predetermined value.
  • the safety valve 105 is also called a break-out valve.
  • the safety valve 105 is provided, for example, in the lid 102.
  • the holding unit 200 holds a plurality of batteries 100, as shown in Figures 1 to 4.
  • the holding unit 200 includes a first end spacer 201, a cell spacer 202, and a second end spacer 203.
  • the holding unit 200 also includes a first end block 211, a second end block 212, an insulating member 221, and an insert nut 222.
  • the holding unit 200 also includes a first side plate 231, a second side plate 232, and a fastening bolt 241.
  • the components included in the holding unit 200 will be described below.
  • the first end spacer 201 is a holding member. As shown in FIG. 4, the first end spacer 201 is provided between the first end block 211 and the battery 100. The first end spacer 201 contacts the first battery 100 located at one end side of the 20 stacked batteries 100. This battery 100 corresponds to the battery 100 located at the left end in FIG. 2. The first end spacer 201 insulates the first end block 211 and the battery 100. The first end spacer 201 covers each side surface of the first end block 211 and the battery 100 along the width direction Y. The first end spacer 201 covers a part of the side surface 100b of the battery 100 along the stacking direction X.
  • the thickness of the first end spacer 201 along the stacking direction X is sufficiently thinner than the thickness of the battery 100 along the stacking direction X.
  • the first end spacer 201 is made of an insulating material.
  • the first end spacer 201 may be made of a conductive material.
  • the first end spacer 201 has a principal surface covering portion 201a that covers the principal surface 100c of the battery 100.
  • the principal surface covering portion 201a has a first surface 201p that faces the principal surface 100c of the battery 100 in the stacking direction X.
  • the first surface 201p is provided with a convex protrusion 201d and a concave recess 201e that face the battery 100.
  • the cell spacer 202 is a holding member. As shown in FIG. 4, the cell spacer 202 is provided between adjacent batteries 100. The cell spacer 202 holds and insulates the adjacent batteries 100. The cell spacer 202 covers the main surfaces 100c of the adjacent batteries 100 along the width direction Y and a portion of the side surfaces 100b of the adjacent batteries 100 along the stacking direction X. The thickness of the cell spacer 202 along the stacking direction X is sufficiently thinner than the thickness of the batteries 100 along the stacking direction X.
  • the cell spacer 202 is made of an insulating material. The cell spacer 202 may be made of a conductive material.
  • the cell spacer 202 is formed by injection molding a resin material having, in particular, insulating and heat-resistant properties.
  • a resin material having, in particular, insulating and heat-resistant properties.
  • engineering plastics such as polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polycarbonate (PC), etc. are used as the resin material.
  • the cell spacer 202 may be formed from a heat insulating material such as aerogel. In this case, the cell spacer 202 is formed by subjecting the heat insulating material to punching, cutting, etc.
  • the configuration of the cell spacer 202 is also applied to the first end spacer 201 and the second end spacer 203.
  • the cell spacer 202 has a main surface covering portion 202a that covers the main surface 100c of the battery 100, and a pair of side surface covering portions 202b and 202c that cover a portion of the side surface 100b of the battery 100.
  • the main surface covering portion 202a is formed in a rectangular flat plate shape and is disposed between adjacent batteries 100 along the stacking direction X.
  • the pair of side surface covering portions 202b and 202c are provided at both ends of the main surface covering portion 202a in the width direction Y of the battery 100.
  • the main surface covering portion 202a prevents adjacent batteries 100 from contacting each other.
  • the main surface covering portion 202a functions as an isolating portion that electrically isolates adjacent batteries 100 from each other.
  • the principal surface covering portion 202a has a first surface 202p that faces the principal surface 100c of the battery 100 in the stacking direction X.
  • the first surface 202p has an area that overlaps with the current collector 100d in the stacking direction X.
  • the first surface 202p of the principal surface covering portion 202a has a plurality of protrusions 202d that protrude toward the principal surface 100c of the battery 100.
  • a recess 202e that is recessed relatively to the convex protrusion 202d is provided.
  • the plurality of protrusions 202d protrude from the bottom surface of the concave recess 202e.
  • the convex protrusions 202d and the concave recess 202e are provided opposite the principal surface 100c of the battery 100.
  • the recess 202e is formed in the center of the main surface 100c of the battery 100.
  • the center is a rectangular region having a left-right width of about 85% of the total length of the main surface 100c of the battery 100 in the width direction Y, and a top-bottom width of about 85% of the total length of the main surface 100c in the height direction Z.
  • the center of the rectangular region coincides with the center of the main surface 100c.
  • the multiple protrusions 202d are arranged in a staggered manner on the first surface 202p. That is, the multiple protrusions 202d are arranged alternately one by one in both the width direction Y and the height direction Z on the first surface 202p.
  • the protrusions 202d When viewed from the stacking direction X, the protrusions 202d have a square shape. That is, the protrusions 202d are in the shape of a quadrangular prism.
  • the protrusions 202d are arranged such that one of a pair of diagonals is aligned with the width direction Y and the other of the pair of diagonals is aligned with the height direction Z.
  • the protrusions 202d are not limited to being formed in a quadrangular prism shape.
  • the shape of the protrusions 202d may be other shapes such as a cylindrical shape or a triangular prism shape.
  • the multiple protrusions 202d are not limited to being arranged in a staggered pattern on the first surface 202p.
  • the multiple protrusions 202d may be arranged in a lattice pattern on the first surface 202p.
  • the multiple protrusions 202d may be arranged at equal intervals on straight lines along the width direction Y and the height direction Z.
  • the pressing force acting between the cell spacer 202 and the battery 100 is dispersed over the entire main surface 100c of the battery 100.
  • Adhesive 11 is provided in the recess 202e.
  • the adhesive 11 is, for example, an epoxy-based elastic adhesive.
  • the adhesive 11 By using the adhesive 11, the binding force of the battery pack 1 in the width direction Y and height direction Z is improved.
  • the thickness of the adhesive 11 is precisely determined by the depth of the recess 202e.
  • the depth of the recess 202e matches the height of the protrusion 202d.
  • the side covering portion 202b and the side covering portion 202c function as an isolation portion that electrically isolates the side surface 100b of the battery 100 from the surrounding structures.
  • the side covering portion 202b and the side covering portion 202c also function as a connection portion that connects adjacent cell spacers 202 to each other.
  • the side covering portion 202b and the side covering portion 202c have a second surface 202q that faces the side surface 100b of the battery 100 along the stacking direction X.
  • the second surface 202q of the side covering portion 202b and the second surface 202q of the side covering portion 202c are provided with a convex protrusion and a concave recess.
  • the second end spacer 203 is a retaining member. As shown in FIG. 4, the second end spacer 203 is provided between the battery 100 and the second end block 212. The second end spacer 203 contacts the twentieth battery 100 located at the other end of the 20 stacked batteries 100. This battery 100 corresponds to the battery 100 located at the right end in FIG. 2. The second end spacer 203 insulates the battery 100 from the second end block 212. The second end spacer 203 covers each side surface of the first end block 211 and the battery 100 along the width direction Y. The second end spacer 203 covers a part of the side surface 100b of the battery 100 along the stacking direction X.
  • the thickness of the second end spacer 203 along the stacking direction X is sufficiently thinner than the thickness of the battery 100 along the stacking direction X.
  • the second end spacer 203 is formed of an insulating material.
  • the second end spacer 203 may be made of a conductive material.
  • the second end spacer 203 has a main surface covering portion 203a that covers the main surface 100c of the battery 100.
  • the main surface covering portion 203a has a first surface 203p that faces the main surface 100c of the battery 100 in the stacking direction X.
  • the first surface 203p is provided with a convex protrusion 203d and a concave recess 203e.
  • the first end block 211 is a retaining member. As shown in FIG. 4, the first end block 211 is stacked with the first battery 100 located at one end of the stacked 20 batteries 100 via the first end spacer 201. The first end block 211 extends along the width direction Y intersecting with the stacking direction X of the batteries 100. The first end block 211 is adjacent to the battery 100 located at the end along the stacking direction X and supports the battery 100. The first end block 211 is formed in a rectangular shape extending in the width direction Y. The first end block 211 has a plurality of screw holes 211m formed on the side surface along the width direction Y shown in FIG. 3, into which fastening bolts 241 are screwed.
  • the first end block 211 is fixed to the first side plate 231 by the fastening bolts 241 as shown in FIG. 1. Similarly, the first end block 211 is fixed to the second side plate 232 by the fastening bolts 241.
  • the first end block 211 has an insertion hole 211n for inserting a bolt or the like for fixing the battery pack 1.
  • the first end block 211 is made of, for example, a metal with electrical conductivity or a resin with insulating properties.
  • the metal used may be a steel material such as a cold-rolled steel plate, or a non-ferrous metal such as aluminum.
  • the first end block 211 is particularly formed from a material having electrical conductivity.
  • the electrically conductive material include steel materials such as cold-rolled steel plate, and non-ferrous metal materials such as aluminum.
  • the first end block 211 is formed, for example, by die-casting a light alloy such as an aluminum alloy.
  • the first end block 211 may be formed by extrusion.
  • the first side plate 231 may be formed by subjecting an aluminum alloy plate to cutting and bending processes.
  • the first side plate 231 may be formed by die-casting or extrusion.
  • the configuration of the first end block 211 is also applied to the second end block 212, the first side plate 231, and the second side plate 232.
  • the first end block 211 has a main surface covering portion that covers the main surface 100c of the battery 100 via the first end spacer 201.
  • the main surface covering portion has a first surface that faces the main surface 100c of the battery 100 via the first end spacer 201 in the stacking direction X.
  • the first surface is provided with a convex protrusion and a concave recess that face the battery 100.
  • the second end block 212 is a retaining member. As shown in FIG. 4, the second end block 212 is stacked with the twentieth battery 100 located at the other end of the stacked 20 batteries 100 via the second end spacer 203. The second end block 212 extends along the width direction Y of the battery 100. The second end block 212 is adjacent to the battery 100 located at the end along the stacking direction X and supports the battery 100. The second end block 212 is formed in a rectangular shape extending in the width direction Y. The second end block 212 has a plurality of screw holes formed on the side surface along the width direction Y shown in FIG. 3, into which fastening bolts 241 are screwed.
  • the second end block 212 is fixed to the first side plate 231 by the fastening bolts 241 as shown in FIG. 1. Similarly, the second end block 212 is fixed to the second side plate 232 by the fastening bolts 241.
  • the second end block 212 has an insertion hole 212n for inserting a bolt or the like for fixing the battery pack 1.
  • the second end block 212 is made of, for example, a metal with electrical conductivity or a resin with insulating properties.
  • the metal used may be a steel material such as a cold-rolled steel plate, or a non-ferrous metal such as aluminum.
  • the second end block 212 has a main surface covering portion 212a that covers the main surface 100c of the battery 100 via the second end spacer 203.
  • the main surface covering portion 212a has a first surface 212p that faces the main surface 100c of the battery 100 via the second end spacer 203 in the stacking direction X.
  • the first surface 212p is provided with a convex protrusion 212d and a concave recess 212e that face the battery 100 via the second end spacer 203.
  • the insulating member 221 is not an insulating member that is joined to a holding member (e.g., cell spacer 202) and has insulating properties, as described in the first embodiment, which is one aspect of the invention. As shown in FIG. 4, the insulating member 221 is inserted into the first end block 211. The insulating member 221 is also inserted into the second end block 212. The insulating member 221 is formed, for example, in a rectangular parallelepiped shape. The insulating member 221 is formed from an insulating material.
  • the insulating member 221 may be configured as follows. That is, the insulating member 221 may be configured by being molded integrally with the first end spacer 201, or by being molded separately from the first end spacer 201 and then joined to the first end spacer 201. In such a case, the first end block 211 has a recess on the surface facing the first end spacer 201 to accommodate the insulating member 221 along the stacking direction X. Similarly, the insulating member 221 may be configured by being molded integrally with the second end spacer 203, or by being molded separately from the second end spacer 203 and then joined to the second end spacer 203. In such a case, the second end block 212 has a recess on the surface facing the second end spacer 203 to accommodate the insulating member 221 along the stacking direction X.
  • the insert nut 222 is embedded in a recess formed in the upper surface of the insulating member 221.
  • the insert nut 222 is anchored to a fastening bolt via a bus bar that is electrically connected to an external control device, for example.
  • the first side plate 231 is a holding member. As shown in FIG. 1, the first side plate 231 is arranged at one end of the stacked batteries 100 in the width direction Y along the stacking direction X of the stacked batteries 100. The first side plate 231 holds the batteries 100 along the stacking direction X. Both ends of the first side plate 231 extending along the stacking direction X are bent toward the width direction Y. As shown in FIG. 3, the first side plate 231 has a plurality of insertion holes 231m formed on its side along the width direction Y into which fastening bolts 241 are inserted. As shown in FIG. 1, the first side plate 231 is fixed to the first end block 211 and the second end block 212 by the fastening bolts 241.
  • the first side plate 231 is formed of, for example, a metal having electrical conductivity or a resin having electrical insulation. The metal used may be a steel material such as a cold-rolled steel plate, or a non-ferrous metal such as aluminum.
  • the first side plate 231 has a pair of principal surface covering portions 231a and 231b, and a side surface covering portion 231c.
  • the pair of principal surface covering portions 231a and 231b cover the principal surface 100c of the battery 100 via other components.
  • the side surface covering portion 231c covers a portion of the side surface 100b of the battery 100 via other components.
  • the pair of principal surface covering portions 231a and 231b have a first surface 231p that faces the principal surface 100c of the battery 100 in the stacking direction X.
  • the side surface covering portion 231c has a second surface 231q that faces the side surface 100b of the battery 100 along the stacking direction X.
  • the first surface 231p has a convex protrusion that faces the battery 100 and a concave recess.
  • the second surface 231q has a convex protrusion 231d and a concave recess 231e that face the battery 100.
  • the second side plate 232 is a holding member. As shown in FIG. 1, the second side plate 232 is arranged at the other end of the stacked batteries 100 in the width direction Y along the stacking direction X of the stacked batteries 100. The second side plate 232 holds the batteries 100 along the stacking direction X. Both ends of the second side plate 232 extending along the stacking direction X are bent toward the width direction Y. As shown in FIG. 3, the second side plate 232 has a plurality of insertion holes 232m formed on its side along the width direction Y into which fastening bolts 241 are inserted. As shown in FIG. 1, the second side plate 232 is fixed to the first end block 211 and the second end block 212 by the fastening bolts 241.
  • the second side plate 232 is formed of, for example, a metal having electrical conductivity or a resin having electrical insulation. The metal used may be a steel material such as a cold-rolled steel plate, or a non-ferrous metal such as aluminum.
  • the second side plate 232 has a pair of principal surface covering portions 232a and 232b, and a side surface covering portion 232c.
  • the pair of principal surface covering portions 232a and 232b cover the principal surface 100c of the battery 100 via other components.
  • the side surface covering portion 232c covers a portion of the side surface 100b of the battery 100 via other components.
  • the pair of principal surface covering portions 232a and 232b have a first surface 232p that faces the principal surface 100c of the battery 100 in the stacking direction X.
  • the side surface covering portion 232c has a second surface 232q that faces the side surface 100b of the battery 100 along the stacking direction X.
  • the first surface 232p has a convex protrusion and a concave recess that face the battery 100.
  • the second surface 232q has a convex protrusion and a concave recess that face the battery 100.
  • the fastening bolts 241 fasten the first side plate 231 to the first end block 211, and the first side plate 231 to the second end block 212. As shown in FIG. 2, the fastening bolts 241 fasten the second side plate 232 to the first end block 211, and the second side plate 232 to the second end block 212.
  • busbar unit 300 (Configuration of busbar unit 300) 1, 2 and 5 electrically connects a plurality of batteries 100.
  • the busbar unit 300 includes a first end bus bar 301, a plurality of bus bars 302, a second end bus bar 303, and a busbar holder 311. The components included in the busbar unit 300 will be described below.
  • the first end bus bar 301 is joined to the positive terminal 103 of the battery 100 that is closest to the first end block 211 among the 20 stacked batteries 100.
  • the first end bus bar 301 includes a plate-shaped first joint portion 301a, a plate-shaped second joint portion 301b, a curved connecting portion 301c, and an insertion hole 301d.
  • the first joint portion 301a is joined to a bus bar that is electrically connected to an external control device.
  • the second joint portion 301b is joined to the positive terminal 103 of the battery 100.
  • the connecting portion 301c connects the first joint portion 301a and the second joint portion 301b.
  • the insertion hole 301d is formed in the first joint portion 301a.
  • a fastening bolt is inserted into the insertion hole 301d.
  • the first joint portion 301a and the bus bar that is electrically connected to an external control device are joined by a fastening bolt.
  • the first end bus bar 301 is formed of a clad material in which copper and aluminum are bonded, copper, or aluminum.
  • the first joint 301a is formed of copper and the second joint 301b is formed of aluminum.
  • the first end bus bar 301 may be configured such that the first joint 301a, the second joint 301b, and the connecting portion 301c are integrally formed of aluminum.
  • the bus bar 302 electrically connects one battery 100 and another battery 100 adjacent to each other along the stacking direction X. As shown in FIG. 2, the bus bar 302 is joined to the positive terminal 103 of one battery 100 adjacent to each other along the stacking direction X and to the negative terminal 104 of the other battery 100 adjacent to each other along the stacking direction X. As shown in FIG. 5, the bus bar 302 includes a plate-shaped first joint portion 302a, a plate-shaped second joint portion 302b, and a curved connecting portion 302c. The first joint portion 302a is joined to the negative terminal 104 of one adjacent battery 100. The second joint portion 302b is joined to the positive terminal 103 of the other adjacent battery 100.
  • the connecting portion 302c connects the first joint portion 302a and the second joint portion 302b.
  • the busbar 302 is formed, for example, from a clad material in which copper and aluminum are bonded together, copper, or aluminum.
  • the busbar 302 is formed from a clad material, for example, the first joint 302a is formed from copper, and the second joint 302b is formed from aluminum.
  • the busbar 302 may be configured such that the first joint 302a, the second joint 302b, and the connecting portion 302c are integrally formed from aluminum.
  • the second end bus bar 303 is joined to the negative terminal 104 of the battery 100 that is closest to the second end block 212 among the 20 stacked batteries 100.
  • the second end bus bar 303 includes a plate-shaped first joint portion 303a, a plate-shaped second joint portion 303b, a curved connecting portion 303c, and an insertion hole 303d.
  • the first joint portion 303a is joined to the negative terminal 104 of the battery 100.
  • the second joint portion 303b is joined to a bus bar that is electrically connected to an external control device.
  • the connecting portion 303c connects the first joint portion 303a and the second joint portion 303b.
  • the insertion hole 303d is formed in the second joint portion 303b.
  • a fastening bolt is inserted into the insertion hole 303d.
  • the second joint portion 303b and the bus bar that is electrically connected to an external control device are joined by a fastening bolt.
  • the second end bus bar 303 is made of, for example, copper.
  • the busbar holder 311 holds the first end busbar 301, the multiple busbars 302, and the second end busbar 303 together.
  • the busbar holder 311 also covers and insulates the stacked multiple batteries 100.
  • the busbar holder 311 is formed in a plate shape.
  • a plurality of openings 311a are formed in the busbar holder 311. Each opening 311a exposes the first joint or the second joint of the first end busbar 301, the multiple busbars 302, and the second end busbar 303 toward the battery 100 side. Each opening 311a is larger than the first joint or the second joint of the corresponding busbar.
  • a plurality of holding portions 311b are formed in the busbar holder 311.
  • Each of the holding portions 311b holds an end of the first joint or the second joint of the first end bus bar 301, the multiple bus bars 302, and the second end bus bar 303.
  • Each of the holding portions 311b is formed on the edge of the opening 311a.
  • Each of the holding portions 311b has a linear groove along the surface of the bus bar holder 311. The end of the first joint or the second joint of the corresponding bus bar is inserted into the groove provided in each of the holding portions 311b.
  • the bus bar holder 311 is formed with multiple insertion portions 311c. The electric wire 502 of the temperature measurement unit 500 is inserted into the insertion portion 311c.
  • the voltage detection unit 400 detects the voltage of the battery 100 based on control by, for example, an external control device. As shown in Fig. 5, the voltage detection unit 400 includes a voltage detection terminal 401 and an electric wire 402. The components included in the voltage detection unit 400 will be described below.
  • the voltage detection terminal 401 is conductive and formed in a plate shape.
  • the voltage detection terminal 401 is joined to the first end bus bar 301, the multiple bus bars 302, and the second end bus bar 303 of the bus bar unit 300.
  • the electric wire 402 is joined to the voltage detection terminal 401.
  • the electric wire 402 provides electrical continuity between the voltage detection terminal 401 and an external control device.
  • the temperature measurement unit 500 includes a temperature sensor 501 and an electric wire 502. The components included in the temperature measurement unit 500 will be described below.
  • the temperature sensor 501 measures the temperature of the battery 100. As shown in FIG. 2, for example, the temperature sensor 501 is attached to the lids 102 of the battery 100 located at the seventh and fourteenth positions from the first end block 211 to the second end block 212.
  • the electric wire 502 is attached to the temperature sensor 501.
  • the electric wire 502 provides electrical continuity between the temperature sensor 501 and an external control device.
  • Adhesive Composition The configurations of the adhesive 11 and the adhesive 12 will be described.
  • a one-liquid adhesive is used for adhesive 11 and adhesive 12.
  • Some one-liquid adhesives harden naturally at room temperature.
  • Some one-liquid adhesives can be heated to, for example, 60°C to accelerate hardening in about 10 minutes.
  • a two-liquid adhesive is used for adhesive 11 and adhesive 12.
  • a two-liquid adhesive reacts when the base agent and hardener are mixed together, and hardens in a relatively short time.
  • a liquid epoxy resin is used for the base agent.
  • a two-liquid adhesive hardens naturally at room temperature.
  • Adhesives 11 and 12 are selected that have an appropriate adhesive strength depending on the material of the retaining member. If the retaining member is made of a resin material such as polypropylene (PP) or polyethylene terephthalate (PET), adhesives 11 and 12 are selected that can ensure the necessary tensile strength and shear strength, for example. If the retaining member is made of a thermal insulating material, adhesives 11 and 12 are selected that have a high adhesive affinity with the thermal insulating material, for example.
  • PP polypropylene
  • PET polyethylene terephthalate
  • Epoxy adhesive has superior heat resistance and durability compared to UV-curing adhesives.
  • an ultraviolet-curing resin that hardens after a predetermined time has elapsed after being irradiated with ultraviolet light is applied to the adhesive 11 and the adhesive 12.
  • the adhesive 11 is applied to the cell spacer 202, and then the adhesive 11 is irradiated with ultraviolet light, and the cell spacer 202 and the battery 100 are laminated.
  • the cell spacer 202 and the battery 100 are joined by the adhesive 11 that has hardened after a predetermined time has elapsed.
  • the battery pack 1 When the battery pack 1 is mounted on a vehicle, for example, vibrations and shocks applied to the vehicle while it is moving can cause stress at the joints between the bus bars (first end bus bar 301, bus bar 302, and second end bus bar 303) and the electrode terminals (positive terminal 103 and negative terminal 104). For this reason, in the battery pack 1, the multiple batteries 100 are sufficiently fixed (fastened) by the holding member. The heavier the battery 100 is, the greater the fixing force (fastening force) required between the battery 100 and the holding member.
  • the battery pack 1 has a first side plate 231 and a second side plate 232 fastened to a first end block 211 and a second end block 212 by fastening bolts 241.
  • the multiple batteries 100 are sandwiched between the first end block 211 and the second end block 212 from both sides in the stacking direction X.
  • the multiple batteries 100 are pressed and restrained from both sides in the stacking direction X. This secures the stacked multiple batteries 100.
  • the battery pack 1 further includes the battery 100 and the holding member (e.g., cell spacer 202) bonded together by an adhesive (e.g., adhesive 11) provided in a recess (e.g., recess 202e) of the holding member.
  • an adhesive e.g., adhesive 11
  • the bonding portion between the battery 100 and the holding member mainly requires shear strength. If the adhesive is relatively too thin, the battery 100 and the holding member are relatively likely to peel off. On the other hand, if the adhesive is relatively too thick, the battery 100 and the holding member are relatively likely to shear off.
  • a predetermined amount V of adhesive 11 is applied by a dispenser, for example, to the cell spacer 202.
  • the dispenser applies the predetermined amount V to the recess 202e.
  • the film thickness t and adhesive area S of the adhesive 11 are determined based on required specification values such as the required shear force.
  • the adhesive 11 is applied to the cell spacer 202 in a rectangular ring shape.
  • the ring-shaped layer of adhesive 11 having a predetermined width has a portion along the width direction Y and a portion along the height direction Z of the cell spacer 202.
  • the adhesive 11 is applied along the outer periphery of the main surface covering portion 202a from the application start point to the application end point by the dispenser.
  • a ring-shaped bank of adhesive with a predetermined width is formed. Between the application start point and the application end point, an open portion 11a where the adhesive 11 is not applied is formed.
  • the open portion 11a may be formed after forming a closed ring-shaped layer of adhesive 11. As a result, when the cell spacer 202 and the battery 100 are bonded, the air in the space surrounded by the ring-shaped adhesive 11 is discharged to the outside through the open portion 11a.
  • the adhesive 11 hardens after a predetermined time has passed after the cell spacer 202 and the battery 100 are assembled.
  • the thickness t of the hardened adhesive 11 corresponds to the depth of the recess 202e.
  • the thickness t of the adhesive 11 is adjusted by adjusting the depth of the recess 202e.
  • the battery pack 1 is assembled by carrying out the first to eighth steps in order.
  • First step Adhesive is applied to the recesses of the multiple holding members using a dispenser. Adhesive 11 is also applied to the protrusions 202d of the cell spacers 202.
  • Second step Multiple cell spacers 202 are arranged between adjacent batteries 100. In this step, the cell spacers 202 are brought into contact with the batteries 100. The adhesive 11 applied to the protrusions 202d moves to the recesses 202e when the protrusions 202d of the cell spacers 202 are brought into contact with the main surface 100c of the battery 100.
  • a first end spacer 201 and a second end spacer 203 are arranged at both ends of the stacked multiple batteries 100.
  • the first end spacer 201 and the second end spacer 203 are brought into contact with both ends of the multiple batteries 100.
  • the first end block 211 is brought into contact with the first end spacer 201.
  • the second end block 212 is brought into contact with the second end spacer 203.
  • the first side plate 231 and the second side plate 232 are brought into contact with the side surfaces of the battery group 100G.
  • Step 6 The fastening bolt 241 is inserted into the insertion hole 231m of the first side plate 231 and temporarily fastened to the screw hole 211m of the first end block 211 and the second end block 212.
  • the fastening bolt 241 is inserted into the insertion hole 232m of the second side plate 232 and temporarily fastened to the screw hole 211m of the first end block 211 and the second end block 212.
  • Step 7) By fully fastening the fastening bolt 241, the first end block 211 and the second end block 212 press the battery group 100G along the stacking direction X.
  • the battery pack 1 includes a plurality of batteries 100, a holding member, and adhesives 11 and 12.
  • the multiple batteries 100 are stacked together, including a current collector 100d (charge/discharge body).
  • the retaining members include a first retaining member, such as the cell spacer 202, and a second retaining member, such as the first side plate 231.
  • the cell spacer 202 which is a first holding member (holding member), holds the battery 100 in the stacking direction X of the battery 100.
  • the cell spacer 202 has an area that overlaps with the current collector 100d in the stacking direction X.
  • the cell spacer 202 has a first surface 202p and a second surface 202q.
  • the first surface 202p has a concave recess 202e that faces the battery 100 in the stacking direction X.
  • the second surface 202q faces the multiple batteries 100 along the stacking direction X and has a concave recess that faces the battery 100.
  • the first holding member corresponds to the first end spacer 201, the second end spacer 203, the first end block 211, and the second end block 212.
  • the first holding member has at least the first surface.
  • the first side plate 231 which is the second retaining member (retaining member), has a first surface 231p and a second surface 231q.
  • the first surface 231p has a concave recess that faces the battery 100 in the stacking direction X.
  • the second surface 231q faces the multiple batteries 100 along the stacking direction X and has a concave recess 231e that faces the battery 100.
  • the second retaining member corresponds to the second side plate 232 in addition to the first side plate 231.
  • the second retaining member has at least the second surface.
  • Adhesive 11 bonds the battery 100 to the cell spacer 202, and the first end spacer 201 to the first end block 211.
  • Adhesive 11 is provided, for example, in the recess 202e of the cell spacer 202.
  • Adhesive 12 indirectly or directly bonds the battery 100 to the first side plate 231, and the first side plate 231 to the cell spacer 202.
  • Adhesive 12 is provided, for example, in the recess 231e of the first side plate 231.
  • the first holding member holding member
  • the cell spacer 202 has an area overlapping with the current collector 100d of the battery 100 in the stacking direction X, as in the cell spacer 202, and has a first surface 202p with a recess 202e facing the battery 100
  • the battery 100 and the cell spacer 202 can be bonded by the adhesive 11 provided in the recess 202e of the cell spacer 202.
  • the thickness of the adhesive 11 in the stacking direction X can be determined with high precision by the depth of the recess 202e in the stacking direction X. That is, the thickness of the adhesive 11 corresponds to the depth of the recess 202e.
  • the thickness of the adhesive 11 is determined, and then the depth of the recess 202e is set according to the determined thickness of the adhesive 11.
  • the current collector 100d (charge/discharge body) of the battery 100 may expand and contract in the stacking direction X as the battery 100 is charged and discharged. For this reason, it is preferable to properly join the battery 100 and the cell spacer 202, including the area that overlaps with the current collector 100d of the battery 100.
  • the effect of the cell spacer 202 described above is also exerted by the first end spacer 201, the second end spacer 203, the first end block 211, and the second end block 212.
  • the current collector 100d expands and contracts as the battery 100 is charged and discharged. For this reason, it is particularly preferable to properly bond the battery 100 and the cell spacer 202, including the area that overlaps with the active area of the current collector 100d of the battery 100.
  • the second holding member (holding member) is configured to face the plurality of batteries 100 along the stacking direction X, such as the first side plate 231, and has a second surface 231q with a recess 231e facing the battery 100
  • the first side plate 231 and the battery 100 can be bonded by the adhesive 12 provided in the recess 231e of the first side plate 231.
  • the cell spacer 202 and the like are positioned between the first side plate 231 and the battery 100. Therefore, the first side plate 231 and the battery 100 are indirectly bonded via the cell spacer 202 and the like.
  • the thickness of the adhesive 12 along the width direction Y can be determined with high precision by the depth of the recess 231e along the width direction Y.
  • the effects of the first side plate 231 described above are also achieved by the second side plate 232.
  • the battery pack 1 of the first embodiment ensures sufficient adhesive strength between the battery 100 and the cell spacer 202, etc., or between the first end spacer 201 and the first end block 211, etc.
  • the cell spacer 202 which is a holding member, has a convex protrusion 202d on the first surface 202p on which the recess 202e is provided.
  • the recess 202e is configured to be formed relatively more concave than the protrusion 202d.
  • the shape of the recess 202e in the cell spacer 202 can be determined by the shape of the protrusion 202d. That is, in the cell spacer 202, the area where the protrusion 202d does not exist can be determined as the recess 202e. In the cell spacer 202, a part of the area where the protrusion 202d does not exist can be made into the recess 202e.
  • the degree of freedom of the shape can be improved.
  • the entire area where the protrusion 202d does not exist may be made into a recess.
  • the effect of the cell spacer 202 described above is also exerted by the first end spacer 201, the second end spacer 203, the first end block 211, the second end block 212, the first side plate 231, and the second side plate 232.
  • the holding member for example the cell spacer 202
  • the holding member can be made of a material that does not transmit ultraviolet light. This configuration allows for a wider range of material options for the cell spacer 202.
  • the effects of the cell spacer 202 described above are also achieved by the first end spacer 201, the second end spacer 203, the first end block 211, the second end block 212, the first side plate 231, and the second side plate 232.
  • the adhesives 11 and 12 can be formed by including a material that does not harden when exposed to ultraviolet light.
  • This configuration can expand the material options for the cell spacer 202.
  • This configuration also eliminates the need for equipment such as an ultraviolet light irradiation device. As a result, the manufacturing cost of the battery pack 1 can be reduced.
  • This configuration also prevents the adhesives 11 and 12 from hardening in an environment where ultraviolet light is irradiated for the purpose of recognizing component landmarks, visual inspection, etc.
  • the holding member for example, the cell spacer 202
  • the holding member can be made of a heat insulating material, resin, or a material having electrical conductivity.
  • the cell spacer 202 when the cell spacer 202 is made of a heat insulating material, the influence of heat from the outside on the battery 100 can be reduced.
  • the heat insulating material does not contain a powdery substance that promotes thermal diffusion on the surface, the influence of heat on the adhesive 11 can be reduced.
  • the cell spacer 202 is made of a resin, the insulation of the battery 100 can be improved and the weight of the assembled battery 1 can be reduced.
  • the cell spacer 202 is made of a material having electrical conductivity, the main material is metal.
  • Metal has a relatively high thermal conductivity and therefore is excellent in heat dissipation of the battery 100.
  • metal has a relatively high rigidity and therefore can adequately hold the battery 100.
  • the effect of the cell spacer 202 described above is also achieved by the first end spacer 201, the second end spacer 203, the first end block 211, the second end block 212, the first side plate 231, and the second side plate 232.
  • the second end spacer 203 which is a holding member, has a first surface 203p that faces the battery 100 located at the endmost position in the stacking direction X among the multiple stacked batteries 100.
  • the first surface 203p has a recess 203e.
  • the recess 203e is provided with adhesive 11.
  • the holding member for example the second end block 212, has a first surface 212p that faces the end of the battery group 100G including a plurality of stacked batteries 100 in the stacking direction X.
  • the first surface 212p has a recess 212e.
  • the recess 212e is provided with adhesive 11.
  • the cell spacer 202 etc. (first holding member) and the battery 100 are fastened by a first side plate 231 (second holding member) and a fastening bolt 241 (fastening member).
  • the cell spacer 202 etc. (first holding member) and the battery 100 are fastened by a second side plate 232 (second holding member) and a fastening bolt 241 (fastening member).
  • the adhesive 11 etc. with a specified thickness ensures the adhesive strength between the battery 100 and the cell spacer 202 etc., and the fastening bolt 241 can sufficiently fix the battery 100 and the cell spacer 202 etc.
  • the adhesive 11 is provided in a ring shape in the recess 202e of the cell spacer 202, and has an open portion 11a. That is, an open portion 11a is provided in the C-shaped adhesive 11 on the first surface 202p of the cell spacer 202. Therefore, air sandwiched in the C-shaped adhesive 11 between the cell spacer 202 and the battery 100 is discharged to the outside through the open portion 11a. As a result, the surface pressure between the cell spacer 202 and the battery 100 can be appropriately determined.
  • the effects of the cell spacer 202 and the battery 100 described above are also achieved by the first end spacer 201, the second end spacer 203, the first end block 211, the second end block 212, the first side plate 231, and the second side plate 232.
  • FIG. 8 is a partial cross-sectional view that shows a schematic diagram of the adhesive structure between the cell spacer 202 and the battery 100 according to the first modified example of the first embodiment.
  • the first modified example differs from the first embodiment in that an insulating film 20 is bonded to the cell spacer 202.
  • an insulating film 20 is bonded to the first surface 202p of the cell spacer 202 according to the first modified example.
  • the insulating film 20 is an insulating member.
  • the insulating film 20 has flexibility.
  • the insulating film 20 is formed of, for example, polyethylene terephthalate (PET).
  • PET polyethylene terephthalate
  • the insulating film 20 has an adhesive layer 20a on the side that is bonded to the cell spacer 202.
  • the insulating film 20 is bonded to the first surface 202p of the cell spacer 202 via the adhesive layer 20a.
  • the insulating member may be an insulating plate having high rigidity instead of the insulating film 20 having flexibility.
  • the insulating film 20 has a recess that is recessed to conform to the shape of the recess 202e.
  • the adhesive 11 is provided in the recess of the insulating film 20. In other words, the adhesive 11 is provided in the recess 202e via the insulating film 20.
  • the cell spacer 202 and the battery 100 are bonded via the insulating film 20 and the adhesive 11.
  • the first modified example may be applied to the first end spacer 201, the second end spacer 203, the first end block 211, the second end block 212, the first side plate 231, or the second side plate 232.
  • the battery pack 1 has an insulating film 20 that is joined to a holding member, such as a cell spacer 202, and has insulating properties.
  • the cell spacer 202 is formed, for example, from a conductive material.
  • the insulating film 20 is recessed along the shape of the recess 202e.
  • the adhesive 11 is provided in the recess 202e via the insulating film 20.
  • the cell spacer 202 and the battery 100 can be insulated by the insulating film 20.
  • This configuration is particularly suitable when the cell spacer 202 is formed from a conductive material.
  • the main material is metal.
  • Metal has a relatively high thermal conductivity and therefore has excellent heat dissipation properties for the battery 100. Furthermore, metal has a relatively high rigidity and therefore can adequately hold the battery 100.
  • the effects of the insulating film 20 and cell spacer 202 described above are also achieved by the first end spacer 201, the second end spacer 203, the first end block 211, the second end block 212, the first side plate 231, and the second side plate 232. It is particularly preferable if the first side plate 231 and the second side plate 232 are made of a material that includes a conductive metal.
  • the insulating film 20 has an adhesive layer 20a on the side that is bonded to the holding member, for example, the cell spacer 202.
  • the insulating film 20 and the cell spacer 202 can be easily fixed.
  • the insulating film 20 and the cell spacer 202 can be sufficiently fixed in the recess 202e of the cell spacer 202.
  • the depth of the recess 202e in the state covered by the insulating film 20 can be made constant.
  • the effects of the insulating film 20 and the cell spacer 202 described above are also exerted by the first end spacer 201, the second end spacer 203, the first end block 211, the second end block 212, the first side plate 231, and the second side plate 232.
  • FIG. 9 is a perspective view showing a cell spacer 202 to which adhesive 13 has been applied according to a second modified example of the first embodiment.
  • the second modified example differs from the first embodiment in the shape of the layer of adhesive 13.
  • the layer of adhesive 13 extends linearly in the width direction Y on the first surface 202p of the cell spacer 202.
  • a linear layer of adhesive 13 having a predetermined width is provided on the first surface 202p of the cell spacer 202 according to the second modification.
  • the adhesive 13 is applied along the width direction Y of the battery pack 1.
  • the linear layer of adhesive 13 is formed near one end (upper end) and the other end (lower end) of the main surface covering portion 202a in the height direction Z.
  • the linear layers of adhesive 13 are not limited to being arranged in two in the height direction Z on the first surface 202p.
  • three or more layers of adhesive 13 each extending in the width direction Y may be arranged at a distance in the height direction Z of the first surface 202p.
  • only one layer of adhesive 13 extending in the width direction Y may be provided on the first surface 202p.
  • the second modified example may be applied to the first end spacer 201, the second end spacer 203, the first end block 211, the second end block 212, the first side plate 231, or the second side plate 232.
  • the cell spacer 202 and the battery 100 can be bonded with uniform adhesive force along the width direction Y.
  • the effect of the above-mentioned joining structure of the cell spacer 202 and the battery 100 is also exerted by the first end spacer 201, the second end spacer 203, the first end block 211, the second end block 212, the first side plate 231, and the second side plate 232.
  • FIG. 10 is a perspective view showing a cell spacer 202 to which adhesive 14 has been applied according to a third modified example of the first embodiment.
  • the third modified example differs from the first embodiment in the shape of the layer of adhesive 14.
  • the layer of adhesive 14 extends linearly in the height direction Z on the first surface 202p of the cell spacer 202.
  • a linear layer of adhesive 14 having a predetermined width is provided on the first surface 202p of the cell spacer 202 according to the third modification.
  • the adhesive 14 is applied along the height direction Z of the battery pack 1.
  • the linear layer of adhesive 14 is formed near one end (left end) of the main surface covering portion 202a in the width direction Y, near the other end (right end), and in the center.
  • the linear layer of adhesive 14 is not limited to three layers arranged in the width direction Y on the first surface 202p.
  • four or more layers of adhesive 14 each extending in the height direction Z may be arranged at a distance in the width direction Y of the first surface 202p.
  • only two or only one layer of adhesive 14 extending in the height direction Z may be provided on the first surface 202p.
  • the third modified example may be applied to the first end spacer 201, the second end spacer 203, the first end block 211, the second end block 212, the first side plate 231, or the second side plate 232.
  • the cell spacer 202 and the battery 100 can be bonded with uniform adhesive force along the height direction Z.
  • the effect of the above-mentioned joining structure of the cell spacer 202 and the battery 100 is also exerted by the first end spacer 201, the second end spacer 203, the first end block 211, the second end block 212, the first side plate 231, and the second side plate 232.
  • FIG. 11 is a perspective view showing a cell spacer 204 to which adhesive 15 according to a fourth modified example of the first embodiment has been applied.
  • FIG. 12 is a partial cross-sectional view showing a schematic adhesion structure between the cell spacer 204 and the battery 100 in FIG. 11.
  • the configuration of the recess 204e of the cell spacer 204 differs from the configuration of the recess 202e of the cell spacer 202 of the first embodiment.
  • the recess 204e is recessed with respect to the first surface 204p of the cell spacer 204.
  • the cell spacer 204 in the fourth modified example is a holding member. As shown in Figures 11 and 12, the first surface 204p of the main surface covering portion 204a of the cell spacer 204 has a plurality of recesses 204e formed on the side opposite to the main surface 100c of the opposing battery 100.
  • the recesses 204e are formed on the first surface 204p of the cell spacer 204 in a rhombic shape, for example.
  • the recesses 204e are arranged in a staggered manner on the first surface 204p. That is, the recesses 204e are arranged alternately one by one in both the width direction Y and the height direction Z.
  • the recesses 204e have a square shape when viewed from the stacking direction X. When viewed from the stacking direction X, the recesses 204e are arranged such that one of a pair of diagonals is aligned with the width direction Y and the other of the pair of diagonals is aligned with the height direction Z.
  • the adhesion portions of the cell spacer 204 and the battery 100 are distributed over the entire first surface 204p of the cell spacer 204 and the main surface 100c of the battery 100.
  • the multiple depressions 204e are not limited to being arranged in a staggered pattern.
  • the multiple depressions 204e may be arranged in a lattice pattern. That is, the multiple depressions 204e may be arranged at equal intervals on a straight line along each of the width direction Y and height direction Z.
  • the depressions 204e may be configured so that their shape when viewed from the stacking direction X is rectangular, circular, triangular, polygonal, or the like.
  • the depressions 204e may be configured in a pyramidal or conical shape that becomes smaller along the depth direction.
  • the recesses 204e are filled with adhesive 15.
  • the cell spacer 204 in which adhesive 15 has been filled in each of the recesses 204e, comes into contact with the battery 100, the battery 100 and the cell spacer 204 are bonded together by the adhesive 15.
  • the thickness of the adhesive 15 is determined by the depth of the recesses 204e.
  • the fourth modified example may be applied to the first end spacer 201, the second end spacer 203, the first end block 211, the second end block 212, the first side plate 231, or the second side plate 232.
  • the cell spacer 204 which is a first holding member (holding member), holds the battery 100 in the stacking direction X of the batteries 100.
  • the cell spacer 204 has an area that overlaps with the current collector 100d in the stacking direction X.
  • the cell spacer 204 has a first surface 204p and a second surface 204q.
  • the first surface 204p has a concave recess 204e that faces the battery 100 in the stacking direction X.
  • the second surface 204q faces the multiple batteries 100 along the stacking direction X and has a concave recess that faces the battery 100.
  • the battery 100 and the cell spacer 204 can be bonded together by adhesive 15 provided in the recess 204e of the cell spacer 204.
  • the thickness of the adhesive 15 along the stacking direction X can be determined with high precision by the depth of the recess 204e along the stacking direction X.
  • the surface area of the adhesive 15 determined in the width direction Y and height direction Z can be determined with high precision by the shape of the opening of the recess 204e.
  • the effect of the cell spacer 204 described above is also achieved by the first end spacer 201, the second end spacer 203, the first end block 211, and the second end block 212.
  • the effect of the joining structure between the cell spacer 204 and the battery 100 described above is also exerted by the first side plate 231 and the second side plate 232.
  • FIG. 13 is a perspective view showing a cell spacer 205 to which adhesive 16 has been applied according to the fifth modified example of the first embodiment.
  • the configuration of the recess 205e of the cell spacer 205 differs from the configuration of the recess 204e of the cell spacer 204 in the fourth modified example.
  • the recess 205e is recessed in a C-shape relative to the first surface 205p of the cell spacer 205.
  • the cell spacer 205 holds the battery 100 in the stacking direction X of the battery 100.
  • the recess 205e is provided on the first surface 205p and is formed in a groove shape along the width direction Y and height direction Z that intersect with the stacking direction X.
  • a rectangular and annular recess 205e having a predetermined width is formed on the first surface 205p of the main surface covering portion 205a of the cell spacer 205.
  • the recess 205e is formed in an annular shape by a portion on the first surface 205p that is formed in a groove shape along the width direction Y and a portion that is formed in a groove shape along the height direction Z.
  • the recess 205e is not completely annular, but has an opening 16a that is partially open.
  • the recess 205e is C-shaped with the opening of the C-shape positioned, for example, downward.
  • the recess 205e is filled with adhesive 16.
  • the fifth modified example may be applied to the first end spacer 201, the second end spacer 203, the first end block 211, the second end block 212, the first side plate 231, or the second side plate 232.
  • the cell spacer 205 holds the battery 100 in the stacking direction X of the battery 100.
  • the recess 205e is provided on the first surface 205p and is formed in a groove shape along the width direction Y and height direction Z that intersect with the stacking direction X.
  • the layer of adhesive 16 provided in the recess 205e extends linearly in the width direction Y of the battery 100, so that the cell spacer 205 and the battery 100 can be bonded with uniform adhesive force along the width direction Y.
  • the effect of the above-mentioned joining structure of the cell spacer 205 and the battery 100 is also exerted by the first end spacer 201, the second end spacer 203, the first end block 211, the second end block 212, the first side plate 231, and the second side plate 232.
  • the cell spacer 205 holds the battery 100 in the stacking direction X of the battery 100.
  • the recess 205e is provided on the first surface 205p and is formed in a groove shape along the height direction Z intersecting with the stacking direction X. Since the layer of adhesive 16 provided in the recess 205e on the first surface 205p of the cell spacer 205 extends linearly in the height direction Z of the battery 100, the cell spacer 205 and the battery 100 can be bonded with uniform adhesive force along the height direction Z.
  • the effect of the above-mentioned joining structure of the cell spacer 205 and the battery 100 is also exerted by the first end spacer 201, the second end spacer 203, the first end block 211, the second end block 212, the first side plate 231, and the second side plate 232.
  • FIG. 14 is a perspective view showing a cell spacer 206 to which adhesive 17 has been applied according to a sixth modified example of the first embodiment.
  • the configuration of the recess 206e of the cell spacer 206 differs from the configuration of the recess 204e of the cell spacer 204 in the fourth modified example.
  • the recess 206e extends linearly in the width direction Y relative to the first surface 206p of the cell spacer 206.
  • the cell spacer 206 holds the battery 100 in the stacking direction X of the battery 100.
  • the recess 206e is provided on the first surface 206p and is formed in a groove shape along the width direction Y intersecting with the stacking direction X.
  • the first surface 206p of the main surface covering portion 206a of the cell spacer 206 is provided with a linear recess 206e of a predetermined width.
  • the recess 206e is filled with adhesive 17.
  • the recess 206e is formed in a groove shape along the width direction Y of the battery pack 1.
  • the linear recess 206e is formed near one end (upper end) and the other end (lower end) of the main surface covering portion 206a in the height direction Z.
  • the linear recess 206e is not limited to being arranged in two in the height direction Z with respect to the first surface 206p.
  • three or more recesses 206e each extending in the width direction Y may be arranged in the height direction Z.
  • only one recess 206e extending in the width direction Y may be provided on the first surface 206p.
  • the sixth modified example may be applied to the first end spacer 201, the second end spacer 203, the first end block 211, the second end block 212, the first side plate 231, or the second side plate 232.
  • the cell spacer 206 holds the battery 100 in the stacking direction X of the battery 100.
  • the recess 206e is provided on the first surface 206p and is formed in a groove shape along the width direction Y intersecting with the stacking direction X.
  • the layer of adhesive 17 provided in the recess 206e extends linearly in the width direction Y of the battery 100, so that the cell spacer 206 and the battery 100 can be bonded with uniform adhesive force along the width direction Y.
  • the effect of the above-mentioned joining structure of the cell spacer 206 and the battery 100 is also exerted by the first end spacer 201, the second end spacer 203, the first end block 211, the second end block 212, the first side plate 231, and the second side plate 232.
  • FIG. 15 is a perspective view showing a cell spacer 207 to which adhesive 18 has been applied according to the seventh modified example of the first embodiment.
  • the configuration of the recess 207e of the cell spacer 207 differs from the configuration of the recess 204e of the cell spacer 204 in the fourth modified example.
  • the recess 207e extends linearly in the height direction Z relative to the first surface 207p of the cell spacer 207.
  • the cell spacer 207 holds the battery 100 in the stacking direction X of the battery 100.
  • the recess 207e is provided on the first surface 207p and is formed in a groove shape along the height direction Z intersecting with the stacking direction X.
  • the first surface 207p of the main surface covering portion 207a of the cell spacer 207 is provided with a linear recess 207e of a predetermined width.
  • the recess 207e is filled with adhesive 18.
  • the recess 207e is formed in a groove shape along the height direction Z of the battery pack 1.
  • the linear recess 207e is formed near one end (left end) of the main surface covering portion 207a in the width direction Y, near the other end (right end), and in the center.
  • the linear depressions 207e are not limited to being arranged in three in the width direction Y on the first surface 207p.
  • four or more depressions 207e each extending in the height direction Z may be arranged in the width direction Y on the first surface 207p.
  • only two or only one depression 207e extending in the height direction Z may be provided on the first surface 207p.
  • the seventh modified example may be applied to the first end spacer 201, the second end spacer 203, the first end block 211, the second end block 212, the first side plate 231, or the second side plate 232.
  • the cell spacer 207 holds the battery 100 in the stacking direction X of the battery 100.
  • the recess 207e is provided on the first surface 207p and is formed in a groove shape along the height direction Z that intersects with the stacking direction X.
  • the layer of adhesive 18 provided in the recess 207e extends linearly in the height direction Z of the battery 100, so that the cell spacer 207 and the battery 100 can be bonded with uniform adhesive force along the height direction Z.
  • the effect of the above-mentioned joining structure of the cell spacer 207 and the battery 100 is also exerted by the first end spacer 201, the second end spacer 203, the first end block 211, the second end block 212, the first side plate 231, and the second side plate 232.
  • FIG. 16 is a perspective view showing a first side plate 233 to which adhesive 19 has been applied according to the eighth modified example of the first embodiment.
  • the configuration of the recess 233e of the first side plate 233 differs from the configuration of the recess 231e of the first side plate 231 of the first embodiment.
  • the recess 233e is recessed relative to the second surface 233q of the first side plate 233.
  • the configuration of the second side plate of the eighth modified example is similar to the configuration of the first side plate 233.
  • the first side plate 233 holds the battery 100 along the stacking direction X of the battery 100.
  • the recess 233e is provided on the second surface 233q, is formed in a groove shape along the stacking direction X, and faces two or more batteries 100.
  • the second surface 233q of the side covering portion 233c of the first side plate 233 is provided with a linear recess 233e of a predetermined width.
  • the recess 233e is filled with adhesive 19.
  • the recess 233e is formed in a groove shape along the stacking direction X of the battery pack 1.
  • the linear recess 233e is formed near one end (upper end) and the other end (lower end) of the side covering portion 233c in the height direction Z.
  • the linear recess 233e is not limited to being arranged in two in the height direction Z with respect to the second surface 233q.
  • three or more recesses 233e each extending in the stacking direction X may be arranged in the height direction Z.
  • only one recess 233e extending in the stacking direction X may be provided on the second surface 233q.
  • the eighth variant may also be applied to the second side plate 232.
  • the first side plate 233 holds the battery 100 along the stacking direction X of the battery 100.
  • the recess 233e is provided on the second surface 233q, is formed in a groove shape along the stacking direction X, and faces two or more batteries 100.
  • the layer of adhesive 19 provided in the recess 233e extends linearly in the stacking direction X of the battery 100, so that the first side plate 233 and the battery 100 can be bonded with uniform adhesive force along the stacking direction X.
  • the first side plate 233 can be stably bonded to multiple batteries 100 along the stacking direction X.
  • the cell spacer 202, etc. are located between the first side plate 231 and the battery 100. Therefore, the first side plate 233 and the battery 100 can be indirectly bonded via the cell spacer 202, etc.
  • the effect of the joining structure between the first side plate 233 and the battery 100 described above is also exerted on the second side plate.
  • Battery assembly 2 according to the second embodiment (Battery assembly 2 according to the second embodiment) (Configuration of battery pack 2 according to second embodiment) The configuration of the battery pack 2 of the second embodiment will be described with reference to FIG.
  • FIG. 17 is an exploded perspective view showing the battery pack 2 of the second embodiment.
  • battery pack 2 components that are the same as battery pack 1 are given the same reference numerals as battery pack 1 and their explanations are omitted.
  • battery pack 2 components that are different from battery pack 1 are given different reference numerals as used for battery pack 1 and their explanations are omitted.
  • the battery pack 2 of the second embodiment is configured by arranging two battery packs in the width direction Y.
  • the two battery packs are connected by an intermediate side plate 234.
  • the intermediate side plate 234 is a holding member.
  • the battery group 100G located on the left side (lower left) of FIG. 17 and the battery group 100G located on the right side (upper right) of FIG. 17 are connected by an intermediate side plate 234.
  • the intermediate side plate 234 corresponds to a configuration in which the first side plate 231 and the second side plate 232 are integrated together.
  • the intermediate side plate 234 has a side covering portion 234c that covers the side surface 100b of the battery 100 via other components.
  • the other components are the first end spacer 201, the cell spacer 202, the second end spacer 203, the first end block 211, and the second end block 212.
  • the side covering portion 234c has a second surface 234q that faces the side surface 100b of the battery 100 along the stacking direction X.
  • the second surface 234q is provided with a convex protrusion 234d and a concave recess 234e.
  • the second surface 234q only needs to face the side surface 100b of at least one of the batteries 100 of the two battery groups 100G in FIG. 17.
  • the pair of main surface covering portions 234a and 234b has a first surface 234p that faces the main surface 100c of the battery 100.
  • the first surface 234p may have a convex protrusion and a concave recess. These configurations have been described in detail using the configuration of the cell spacer 202.
  • the intermediate side plate 234 is provided with adhesive 12, similar to the first side plate 231.
  • An insertion hole 234m is formed in the pair of main surface covering parts 234a and 234b.
  • the fastening bolt 241 is inserted into the insertion hole 234m and screwed into the screw hole 211m of the first end block 211.
  • the fastening bolt 241 is also inserted into the insertion hole 234m and screwed into the screw hole of the second end block 212.
  • the intermediate side plate 234 is formed, for example, from a conductive metal or an insulating resin.
  • the intermediate side plate 234 is formed by die-casting a light alloy such as an aluminum alloy.
  • the intermediate side plate 234 may also be formed by extrusion molding.
  • the first surface 234p has a concave recess that faces the battery 100 in the stacking direction X.
  • the second surface 234q faces the multiple batteries 100 along the stacking direction X and has a concave recess 234e that faces the battery 100.
  • the adhesive 12 bonds the battery 100 to the intermediate side plate 234.
  • the adhesive 12 is provided in the recess 234e of the intermediate side plate 234.
  • the intermediate side plate 234 and the battery 100 can be bonded by the adhesive 12 provided in the recess 234e of the intermediate side plate 234.
  • the cell spacer 202 and the like are positioned between the intermediate side plate 234 and the battery 100. Therefore, the intermediate side plate 234 and the battery 100 are indirectly bonded via the cell spacer 202 and the like.
  • the thickness of the adhesive 12 in the width direction Y can be determined with high precision by the depth of the recess 234e in the width direction Y.
  • the battery pack 2 of the second embodiment ensures sufficient adhesive strength between the battery 100 and the middle side plate 234.
  • FIG. 18 is a perspective view showing a battery 110 coated with adhesive 21 and a cell spacer 208 that constitute a battery pack of the third embodiment.
  • components that are the same as those in the battery pack 1 are given the same reference numerals as those in the battery pack 1, and descriptions thereof are omitted.
  • components that are different from those in the battery pack 1 are given different reference numerals as those in the battery pack 1, and descriptions thereof are omitted.
  • the holding member configuration of the first embodiment is provided in the container 111 of the battery 110. That is, the battery pack of the third embodiment has a recess 111e in which adhesive 21 is provided on the battery 110 side, not on the holding member side.
  • the battery pack of the third embodiment is configured as follows. That is, the battery pack has a plurality of stacked batteries 110 including charge/discharge elements, a holding member (cell spacer 208) that holds the batteries 110 in the stacking direction X of the batteries 110, and an adhesive 21 that bonds the batteries 110 and the holding member (cell spacer 208).
  • the battery 110 has a first surface 111p that has a concave recess 111e that faces the holding member (cell spacer 208) in the stacking direction X.
  • the adhesive 21 is provided in the recess 111e.
  • the battery 110 has a plurality of protrusions 111d and recesses 111e on the main surface 110c.
  • the main surface 110c corresponds to the first surface 111p on the container 111.
  • the protrusions 111d of the battery 110 have a similar configuration to the protrusions 202d of the cell spacer 202 of the first embodiment.
  • the recesses 111e of the battery 110 have a similar configuration to the recesses 202e of the cell spacer 202 of the first embodiment.
  • the configuration of the adhesive 21 is similar to the configuration of the adhesive 11 of the first embodiment.
  • the layer of adhesive 21 is not completely annular, but has a partially open opening 21a formed therein.
  • the cell spacer 208 does not have any protrusions or recesses in the main surface covering portion 208a that covers the main surface 110c of the battery 110.
  • the rest of the configuration of the cell spacer 208 is the same as that of the cell spacer 202.
  • the configurations of the first to third modified examples of the first embodiment may be applied to the configuration of the third embodiment.
  • the battery 110 has a first surface 111p with a concave recess 111e facing the cell spacer 208 in the stacking direction X.
  • the adhesive 21 is provided in the recess 111e.
  • the battery 110 and the cell spacer 208 can be bonded by the adhesive 21 provided in the recess 111e of the battery 110.
  • the thickness of the adhesive 21 in the stacking direction X can be determined with high precision by the depth of the recess 111e in the stacking direction X.
  • the effects of the battery 110 and the cell spacer 208 described above also apply to the battery 110 and the first end spacer 201, and the battery 110 and the second end spacer 203.
  • the battery pack of the third embodiment ensures sufficient adhesive strength between the battery 110 and the cell spacer 208, etc.
  • FIG. 19 is a perspective view showing a battery 120 and a cell spacer 208 to which adhesive 22 has been applied in a modified example of the third embodiment.
  • the modified example is a configuration in which the configuration of the fourth modified example of the first embodiment is provided in the container 121 of the battery 120.
  • the recess 121e is recessed with respect to the main surface 120c of the container 121 of the battery 120.
  • the main surface 120c corresponds to the first surface 121p provided on the container 121.
  • the configuration of the recess 121e is similar to that of the recess 204e of the cell spacer 204 of the fourth modified example of the first embodiment shown in FIG. 11.
  • An adhesive 22 is inserted into the recess 121e.
  • the configuration of the adhesive 22 is similar to that of the adhesive 15 of the fourth modified example of the first embodiment shown in FIG. 11.
  • the adhesive 22 is applied to the first surface 121p of the battery 120, for example, by using a mask with a diamond-shaped opening or by using transfer printing.
  • the configurations of the fourth to seventh modified examples of the first embodiment may be applied to the modified examples.
  • the battery 120 has a first surface 121p with a concave recess 121e that faces the cell spacer 208 in the stacking direction X.
  • the adhesive 22 is provided in the recess 121e.
  • the battery 120 and the cell spacer 208 can be bonded together by adhesive 22 provided in the recess 121e of the battery 120.
  • the thickness of the adhesive 22 along the stacking direction X can be determined with high precision by the depth of the recess 121e along the stacking direction X.
  • the surface area of the adhesive 22 determined in the width direction Y and height direction Z can be determined with high precision by the shape of the opening of the recess 121e.
  • the battery pack of the present invention is not limited to the configuration of the battery pack described in the embodiment, and can be appropriately configured based on the contents described in the claims.
  • the battery pack may be configured as follows. That is, the battery pack includes a plurality of stacked batteries including a charging/discharging body, a holding member that holds the batteries in the stacking direction of the batteries or along the stacking direction, and an adhesive that bonds the batteries and the holding member, or the holding members to each other.
  • the holding member has at least one of a first surface that has an area that overlaps with the charging/discharging body in the stacking direction and has a convex protrusion that faces the batteries, and a second surface that faces the plurality of batteries along the stacking direction and has the convex protrusion that faces the batteries.
  • the adhesive is provided on at least one of the first surface or the second surface, and is adjacent to the protrusion in a direction that intersects with the protrusion direction of the protrusion.
  • the adhesive is provided on a cell spacer, and is adjacent to the protrusion in a direction that intersects with the protrusion direction of the protrusion (width direction Y or height direction Z).
  • the recess of the cell spacer is not essential.
  • the adhesive is provided, for example, on the first side plate, and is adjacent to the protruding portion in a direction intersecting the protruding direction of the protruding portion (stacking direction X or height direction Z). In this configuration, the recess of the first side plate is not essential.
  • the first side plate 231 and the second side plate 232 which are the second holding member (holding member), do not need to have a first surface that faces the main surface 100c of the battery 100 in the stacking direction X.
  • first end spacer 201 or the first end block 211 adjacent to each other in the stacking direction X has a recess in which adhesive is provided to bond the first end spacer 201 and the first end block 211 together.
  • second end spacer 203 or the second end block 212 adjacent to each other in the stacking direction X has a recess in which adhesive is provided to bond the second end spacer 203 and the second end block 212 together.
  • the area where the adhesive is applied to the holding member or the battery is not limited to the examples described in the above embodiments.
  • the adhesive 11 may be applied to the entire surface of the holding member, e.g., the first surface 202p of the cell spacer 202.
  • the adhesive 11 may also be applied in a cross shape to the first surface 202p of the cell spacer 202.
  • the holding member for example, the cell spacer 202, may be configured to have only the main surface covering portion 202a, without having the side covering portion 202b and the side covering portion 202c.
  • the second surface 231q of the first side plate 231 is in direct contact with the side surface 100b of the battery 100 and is adhered thereto by the adhesive 12.
  • the first side plate 231 is conductive, the side surface 100b of the battery 100 etc. are insulated by the insulating film 20.
  • the holding member for example the cell spacer 202, may have a configuration in which the recess 202e penetrates in the stacking direction X.
  • the batteries 100 adjacent to each other in the stacking direction X via the cell spacer 202 can be directly joined together with the adhesive 11.
  • the holding member for example the cell spacer 204, may have grooves that connect adjacent recesses 204e.
  • the adhesive bonds the battery and the holding member.
  • the adhesive bonds the battery and the holding member while being applied to the holding member.
  • the battery 100 to which the adhesive has been applied may also be bonded to the holding member.
  • the adhesive adheres the battery and the holding member when applied to the battery.
  • the battery 100 may be adhered to the holding member to which the adhesive is applied.
  • the number of batteries 100 included in the battery group 100G is not limited to 20.
  • the number of batteries 100 included in the battery group 100G may be, for example, 2 to 19 or 21 or more.
  • the batteries 100 are not limited to lithium ion batteries.
  • nickel-metal hydride batteries and lead batteries can be used as the batteries 100.
  • the batteries 100 are not limited to secondary batteries.
  • primary batteries can be used as the batteries 100.
  • Three or more battery groups 100G may be provided.
  • Main surface covering part 201d... Projecting part, 201e... Recessed part, 201p... First surface, 202, 204, 205, 206, 207, 208... Cell spacer (holding member), 202a, 204a, 205a, 206a, 207a, 208a... Main surface covering part, 202b... Side covering part, 202c ...Side covering part, 202d...Protrusion protruding portion, 202e, 204e, 205e, 206e, 207e... recessed portion, 202p, 204p, 205p, 206p, 207p... first surface, 202q... second surface, 203... second end spacer (holding member), 203a... main surface covering portion, 203d...
  • protruding portion protruding portion, 203e... recessed portion, 203p... first surface, 211... first end block (holding member) member), 211m...screw hole, 211n...insertion hole, 212...second end block (holding member), 212a...main surface covering portion, 212d...protrusion, 212e...recess, 212n...insertion hole, 212p...first surface, 221...insulating member, 222...insertion nut, 231, 233...first side plate (holding member), 231a, 231b...main surface covering portion, 231c, 233c...side surface covering portion, 231d...protrusion, 231e, 233e...recess, 231m...insertion hole, 231p...first surface, 231q, 233q...second surface, 232...second side plate (holding member), 232a, 232b...main surface covering portion, 232c...side surface covering portion, 232m...insertion hole, 232p...first surface, 232q...second surface,

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

Ce bloc-batterie comprend : une pluralité de batteries (100) empilées qui comprennent un corps de charge/décharge (collecteur de courant) ; des éléments de retenue (une première pièce d'espacement d'extrémité (201), une pièce d'espacement de cellule (202), une seconde pièce d'espacement d'extrémité (203), un premier bloc d'extrémité (211) et un second bloc d'extrémité (212)) retenant les batteries (100) par rapport à une direction d'empilement X des batteries (100) ou le long de celle-ci ; et un adhésif (11) pour coller les batteries (100) et les éléments de retenue les uns aux autres, ou les éléments de retenue ensemble. Les éléments de retenue comportent : une première surface qui, par rapport à la direction d'empilement, présente une zone chevauchant le corps de charge/décharge et comprend une cavité évidée (202e) faisant face aux batteries (100) et/ou une seconde surface qui, le long de la direction d'empilement, fait face à la pluralité de batteries (100) et comprend une cavité évidée faisant face aux batteries (100). L'adhésif (11) est appliqué dans la cavité (202e).
PCT/JP2024/002341 2023-01-27 2024-01-26 Bloc-batterie Ceased WO2024158045A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2024573234A JPWO2024158045A1 (fr) 2023-01-27 2024-01-26

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2023-010941 2023-01-27
JP2023010941 2023-01-27

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JP (1) JPWO2024158045A1 (fr)
WO (1) WO2024158045A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018125194A (ja) * 2017-02-01 2018-08-09 カルソニックカンセイ株式会社 組電池
WO2020152858A1 (fr) * 2019-01-25 2020-07-30 株式会社 東芝 Bloc-batterie et système de batterie
WO2021166625A1 (fr) * 2020-02-21 2021-08-26 株式会社Ｇｓユアサ Dispositif de stockage d'énergie
JP2022010534A (ja) * 2020-06-29 2022-01-17 トヨタ自動車株式会社 電池モジュール
JP2022143582A (ja) * 2021-03-17 2022-10-03 株式会社Ｇｓユアサ 蓄電装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018125194A (ja) * 2017-02-01 2018-08-09 カルソニックカンセイ株式会社 組電池
WO2020152858A1 (fr) * 2019-01-25 2020-07-30 株式会社 東芝 Bloc-batterie et système de batterie
WO2021166625A1 (fr) * 2020-02-21 2021-08-26 株式会社Ｇｓユアサ Dispositif de stockage d'énergie
JP2022010534A (ja) * 2020-06-29 2022-01-17 トヨタ自動車株式会社 電池モジュール
JP2022143582A (ja) * 2021-03-17 2022-10-03 株式会社Ｇｓユアサ 蓄電装置

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