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WO2016208188A1 - Bloc-batterie - Google Patents

Bloc-batterie Download PDF

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Publication number
WO2016208188A1
WO2016208188A1 PCT/JP2016/002996 JP2016002996W WO2016208188A1 WO 2016208188 A1 WO2016208188 A1 WO 2016208188A1 JP 2016002996 W JP2016002996 W JP 2016002996W WO 2016208188 A1 WO2016208188 A1 WO 2016208188A1
Authority
WO
WIPO (PCT)
Prior art keywords
battery
bus bar
plate
main body
electrode
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/JP2016/002996
Other languages
English (en)
Japanese (ja)
Inventor
季之 本橋
哲 佐久間
祐一郎 野村
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.)
Marelli Corp
Original Assignee
Calsonic Kansei Corp
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 Calsonic Kansei Corp filed Critical Calsonic Kansei Corp
Publication of WO2016208188A1 publication Critical patent/WO2016208188A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • H01M50/218—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material
    • H01M50/22—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material of the casings or racks
    • H01M50/222—Inorganic material
    • H01M50/224—Metals
    • 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
    • H01M50/271—Lids or covers for the racks or secondary casings
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present invention relates to an assembled battery including a plurality of battery cells, a main body, and a bus bar plate having a bus bar.
  • Patent Document 1 In an assembled battery, when a battery cell is arranged and fixed to a main body, a structure using a filler such as a synthetic resin as an absorption structure for dimensional variation of the battery cell and the stack member is used (Patent Document 1).
  • An object of the present invention made in view of such circumstances is to improve the positional accuracy when welding the bus bar to the electrode of the battery cell included in the assembled battery.
  • an assembled battery according to the first aspect of the present invention is A battery cell, a main body, and a bus bar plate having a bus bar,
  • the main body includes an elastic body and a partition plate that partitions and holds the battery cell, The elastic body biases the battery cell toward the partition plate.
  • the main body includes a lower case, a middle case, and an upper case
  • the elastic body is provided in the middle case
  • the partition plate is provided in the lower case
  • the battery cell is sandwiched between the lower case and the middle case or between the middle case and the upper case.
  • the assembled battery according to the third aspect of the present invention is characterized in that the elastic body is made of a softer material than the lower case and the upper case.
  • the assembled battery according to the fourth aspect of the present invention is characterized in that the elastic body is in contact with the battery cell at a curved surface portion of the battery cell.
  • the elastic body biases the battery cell toward the bus bar plate.
  • the positional accuracy when welding the bus bar to the electrode of the battery cell included in the assembled battery can be improved.
  • the positional accuracy of the battery cells held above and below the middle case can be improved collectively.
  • the battery assembly according to the third aspect of the present invention can hold the battery cell more reliably.
  • the stress applied to the battery cell can be relaxed.
  • the distance between the electrode of the battery cell and the bus bar can be within a predetermined range.
  • FIG. 2 is an external perspective view of an upper side of a four-cell stack assembly provided in the power supply device illustrated in FIG. 1.
  • FIG. 2 is an external perspective view of a lower side of a four-cell stack assembly provided in the power supply device illustrated in FIG. 1.
  • FIG. 1 shows the state of the attachment of the bus bar plate with respect to the main body of the 4-cell stack assembly shown in FIG. FIG.
  • FIG. 5 is an exploded view of the main body of the four-cell stack assembly shown in FIG. 4. It is a front view of the bus bar plate with which the 4 cell stack assembly shown in FIG. 4 is provided. It is a figure which shows the state which removed the bus bar in the bus bar plate shown in FIG. It is an external appearance perspective view of the back side of the opening valve cover shown in FIG. It is a figure which shows the main body of the 4-cell stack assembly which provided the crash bead. It is a figure which shows the arrangement position of the crash bead in a middle case. It is a figure which shows the cross-sectional shape of a crash bead. It is a figure which shows the state which the crash bead and the battery contacted. It is a figure which shows the state which has urged
  • An assembled battery according to an embodiment is incorporated in a part of a power supply device that supplies electricity to a vehicle or the like. Then, after explaining the power supply device concerning one embodiment, the assembled battery concerning one embodiment is explained.
  • the assembled battery according to one embodiment is a four-cell stack assembly 200 in which four batteries (battery cells) 250 are incorporated.
  • FIG. 1 is an external perspective view showing the inside of a power supply device according to an embodiment of the present invention.
  • the power supply apparatus 100 includes a housing 110 having an opening on the upper surface 110a side and a lid (not shown) that can cover the upper surface 110a side of the housing 110.
  • FIG. 1 shows a power supply with the lid removed.
  • An apparatus 100 is shown.
  • the housing 110 is made of a metal such as aluminum.
  • the casing 110 and the lid are joined by an appropriate method such as a screw or a clamp with a rubber seal such as ethylene-propylene-diene monomer (EPDM) rubber interposed therebetween, and an upper surface 110a of the casing 110 is joined.
  • the power supply device 100 is configured by covering the side with a lid.
  • the power supply apparatus 100 includes necessary components therein, and these components are electrically connected, for example. However, in FIG. 1, illustration of wiring is omitted for easy understanding.
  • the power supply device 100 will be described as being used by being mounted on a vehicle such as a vehicle equipped with an internal combustion engine or a hybrid vehicle capable of running with the power of both the internal combustion engine and the electric motor. The use of the device 100 is not limited to that used in a vehicle.
  • FIG. 2 is an exploded perspective view of each component inside the power supply apparatus 100 shown in FIG.
  • a housing 110 has a substantially rectangular parallelepiped 4-cell stack assembly 200 having a bus bar plate 210 on one surface and a substantially rectangular parallelepiped shape having a bus bar plate 310 on one surface.
  • the one-cell stack assembly 300 is arranged such that the bus bar plate 210 and the bus bar plate 310 face each other.
  • the four-cell stack assembly 200 and the one-cell stack assembly 300 are configured such that screws are passed through holes 221 and 321 provided in restraining plates 220 and 320 provided on the upper part, and the screws are installed in the housing. It is fixed to the housing 110 by being screwed into a screw hole 111 provided in the interior of the 110.
  • the 4-cell stack assembly 200 has a positive terminal 230a and a negative terminal 230b protruding from the bus bar plate 210.
  • the 1-cell stack assembly 300 includes a positive terminal 330 a and a negative terminal 330 b that protrude from the bus bar plate 310. In a state in which the 4-cell stack assembly 200 and the 1-cell stack assembly 300 are assembled in the housing 110, the negative terminal 230b of the 4-cell stack assembly 200 and the positive terminal 330a of the 1-cell stack assembly 300 are in contact with each other.
  • the power supply device 100 is configured to connect the positive terminal 230a, the negative terminal 230b, the positive terminal 330a, and the negative terminal 330b from the bottom surface 110b side.
  • a bus bar fixing terminal 120 is provided.
  • a battery controller (LBC) 130 and a fusible link 140 are disposed on the top of the one-cell stack assembly 300.
  • the LBC 130 and the fusible link 140 are fixed to the upper part of the one-cell stack assembly 300 by an appropriate method.
  • a current sensor 150 an ICR relay (inrush current reduction relay) 160, and a MOSFET (metal) are provided at a location where the four-cell stack assembly 200 and the one-cell stack assembly 300 are not arranged.
  • the current sensor 150, the ICR relay 160, the MOSFET 170, and the terminal post 180 are fixed to the bottom surface 110b of the housing 110 by an appropriate method.
  • the terminal post 180 has, for example, two terminals.
  • FIG. 3 is a functional block diagram showing an outline of a power supply system including the power supply device 100 shown in FIG.
  • the power supply system 400 includes the power supply device 100, an alternator 410, a starter 420, a second secondary battery 430, a load 440, a switch 450, and a control unit 460.
  • the power supply device 100 includes a first secondary battery 190 configured to include the 4-cell stack assembly 200 and the 1-cell stack assembly 300.
  • the first secondary battery 190, the alternator 410, the starter 420, the second secondary battery 430, and the load 440 are connected in parallel.
  • the ICR relay 160, the current sensor 150, the first secondary battery 190, and the fusible link 140 are connected in series in this order.
  • one terminal 180 a of the terminal post 180 is connected to the alternator 410, and the other terminal 180 b is connected to the load 440.
  • MOSFET 170 is connected in series with second secondary battery 430 and load 440.
  • the ICR relay 160 functions as a switch that connects or disconnects the first secondary battery 190 in parallel with each component outside the power supply device 100 in the power supply system 400.
  • the current sensor 150 has an appropriate structure and measures the current flowing through the circuit including the first secondary battery 190 by an appropriate method.
  • the first secondary battery 190 is a secondary battery such as a lithium ion battery or a nickel metal hydride battery, which includes the 4-cell stack assembly 200 and the 1-cell stack assembly 300 as described above.
  • the first secondary battery 190 has a positive electrode side connected to the current sensor 150 and a negative electrode side connected to the fusible link 140. That is, in the present embodiment, the positive terminal 230 a of the four-cell stack assembly 200 is connected to the current sensor 150, and the negative terminal 330 b of the one-cell stack assembly 300 is connected to the fusible link 140.
  • the fusible link 140 includes a fuse body, a housing made of an insulating resin that accommodates and holds the fuse body, and a cover made of an insulating resin that covers the housing, and is blown when an overcurrent occurs.
  • the MOSFET 170 functions as a switch that connects or disconnects the second secondary battery 430 and the load 440 in parallel with other components in the power supply system 400.
  • the LBC 130 is connected to the first secondary battery 190 and estimates the state of the first secondary battery 190. For example, the LBC 130 estimates a state of charge (SOC) of the first secondary battery 190.
  • SOC state of charge
  • the alternator 410 is a generator and is mechanically connected to the vehicle engine. Alternator 410 generates power by driving the engine. The power generated by the alternator 410 when the engine is driven is adjusted in output voltage by a regulator, and the first secondary battery 190, the second secondary battery 430, the load 440, and a vehicle not shown that are included in the power supply apparatus 100 are supplemented. Can be supplied to the machine. The alternator 410 can generate power by regeneration when the vehicle is decelerated. The electric power regenerated by the alternator 410 is used to charge the first secondary battery 190 and the second secondary battery 430.
  • the starter 420 is configured to include a cell motor, for example, and receives power supply from at least one of the first secondary battery 190 and the second secondary battery 430 to start the engine of the vehicle.
  • the second secondary battery 430 is composed of, for example, a lead storage battery and supplies power to the load 440.
  • the load 440 includes, for example, an audio, an air conditioner, and a navigation system provided in the vehicle, and operates by consuming the supplied power.
  • the load 440 operates by receiving power supply from the first secondary battery 190 while the engine driving is stopped, and operates by receiving power supply from the alternator 410 and the second secondary battery 430 while driving the engine.
  • the switch 450 is connected in series with the starter 420.
  • the switch 450 connects or disconnects the starter 420 in parallel with other components.
  • the control unit 460 controls the overall operation of the power supply system 400.
  • the control unit 460 is configured by, for example, an ECU (Electric Control Unit or Engine Control Unit) of the vehicle.
  • the control unit 460 controls the operation of the switch 450, the ICR relay 160, and the MOSFET 170, and supplies power by the alternator 410, the first secondary battery 190, and the second secondary battery 430, and the first secondary battery. 190 and the second secondary battery 430 are charged.
  • FIGS. 4 is an external perspective view of the upper side of the four-cell stack assembly 200 included in the power supply device 100 shown in FIG. 1
  • FIG. 5 is a lower side view of the four-cell stack assembly 200 included in the power supply device 100 shown in FIG. It is an external perspective view.
  • FIG. 6 is a view showing a state in which the bus bar plate 210 is attached to the main body of the four-cell stack assembly 200 shown in FIG.
  • FIG. 7 is an exploded view of the main body of the four-cell stack assembly 200 shown in FIG.
  • FIG. 8 is a front view of the bus bar plate 210 included in the four-cell stack assembly 200 shown in FIG. 4, that is, the bus bar plate 210 according to an embodiment of the present invention, and FIG. It is a figure which shows the state which removed the bus bar.
  • FIG. 10 is an external perspective view of the back side of the open valve cover shown in FIG.
  • the 4-cell stack assembly 200 is configured by attaching a bus bar plate 210 to a main body 240 that holds batteries 250a, 250b, 250c, and 250d.
  • the bus bar plate 210 is attached to the main body 240 at a fastening point so as to cover the electrodes of the batteries 250a, 250b, 250c and 250d.
  • the side to which the bus bar plate 210 is attached is the front.
  • the main body 240 holds a total of four batteries 250a, 250b, 250c, and 250d in two upper and lower rows and two left and right rows.
  • the battery arranged at the lower left is 250a
  • the battery arranged at the upper left is 250b
  • the battery arranged at the upper right is 250c
  • the battery arranged at the lower right is 250d. If not, they are collectively referred to as battery 250.
  • the main body 240 is configured by holding a battery 250 between an upper case 241 and a lower case 243 and attaching a restraining plate 220 to the upper side of the upper case 241.
  • a middle case 242 is inserted between the upper and lower two-stage batteries 250.
  • the main body 240 has a substantially rectangular parallelepiped shape whose depth in the front-rear direction is shorter than the width in the left-right direction.
  • the upper case 241, the middle case 242 and the lower case 243 are each made of a resin such as polybutylene terephthalate (PBT), and the restraining plate 220 is made of a metal such as aluminum.
  • PBT polybutylene terephthalate
  • the battery 250 is a secondary battery such as a lithium ion battery or a nickel metal hydride battery.
  • the battery 250 is held by the main body 240 such that each electrode 251 is on the front side.
  • each battery 250 has a positive electrode and a negative electrode at both ends in the front view of the main body 240.
  • the lower batteries 250a and 250d are held by the main body 240 such that the positive electrode is disposed at the right end, and the upper batteries 250b and 250c are disposed at the left end.
  • Each battery 250 is provided with a gas escape hole 252 for discharging the gas generated inside the battery 250 to the outside in the center of the positive electrode and the negative electrode when the main body 240 is viewed from the front.
  • the lower case 243 has a concave shape having a space 243a in which the battery 250 can be accommodated in a front view, and has a partition plate 244 for partitioning the battery 250 accommodated in the left and right.
  • the lower case 243 has a flange 245 that protrudes outside the lower case 243 (opposite the space 243a) at the upper ends of the left and right side surfaces 243c.
  • the flange 245 is provided with a plurality of holes 245a penetrating the flange 245. These holes 245a are provided at positions corresponding to the holes 221 provided in the restraint plate 220 in a state where the main body 240 is assembled. A part of the plurality of holes 245a is used for fixing the lower case 243 and the restraining plate 220 by screwing. Further, another part of the plurality of holes 245 a is used for screwing the main body 240 including the restraining plate 220 into the screw hole 111 provided in the housing 110 by penetrating the screw.
  • the lower case 243 has a bead 246 protruding from the bottom surface 243b extending in the longitudinal direction (width direction) on the bottom surface 243b.
  • the bead 246 extends from the bottom surface 243b to the height direction of the flange 245 through the side surface 243c.
  • the bead 246 improves the rigidity of the lower case 243 and the main body 240 in the longitudinal direction.
  • the lower case 243 has a plurality of screw hole constituting portions 247 whose front side is open on the bottom surface 243b.
  • the screw hole constituting portion 247 is provided so as to protrude downward from the bottom surface 243 b of the lower case 243.
  • the lower case 243 has six screw hole constituting portions 247. Specifically, the six screw hole constituting portions 247 are positioned closest to the total four electrodes 251 and the total two gas escape holes 252 of the lower batteries 250a and 250d in a state where the main body 240 is assembled. Is provided.
  • the screw hole provided in the screw hole component 247 is used to screw the bus bar plate 210 to the main body 240. That is, the screw hole constituting part 247 constitutes a fastening point.
  • the middle case 242 is a plate-like member for partitioning the batteries 250 arranged in two upper and lower stages.
  • the middle case 242 is inserted for each pair of batteries 250 arranged vertically in the main body 240. That is, the main body 240 of this embodiment includes two middle cases 242.
  • the width of each middle case 242 is equal to the inner width from the side surface 243 c of the lower case 243 to the partition plate 244.
  • the middle case 242 is provided with flanges 242a on the left and right sides so as to be stably disposed in the space 243a of the lower case 243, and is formed in an H shape when viewed from the front.
  • the flange 242a also has a function of stably holding the battery 250 in the space 243a.
  • the upper case 241 is placed on the upper part of the battery 250 accommodated in the lower case 243 in two stages.
  • the width of the upper case 241 is equal to the inner width between the side surfaces 243c of the lower case 243.
  • the upper case 241 has a flange 241a that protrudes toward the bottom surface 243b of the lower case on the left and right sides, and a partition plate 241b that protrudes toward the bottom surface 243b of the lower case at the center.
  • the upper case 241 is stably disposed in the space 243a of the lower case 243 by the left and right flanges 241a.
  • the upper case 241 can stably hold the battery 250 in the space 243a by the left and right flanges 241a and the partition plate 241b.
  • the upper case 241 has a bead 248 protruding from the upper surface 241c extending in the short side direction (depth direction) on the upper surface 241c.
  • the bead 248 improves the rigidity of the upper case 241 and the main body 240 in the short direction.
  • the upper case 241 has a plurality of screw hole constituting portions 249 whose front side is open on the upper surface 241c.
  • the screw hole component 249 is provided to protrude upward from the upper surface 241c.
  • the upper case 241 has six screw hole constituting portions 249. Specifically, the six screw hole constituting portions 249 are positioned closest to the total four electrodes 251 and the total two gas escape holes 252 of the upper batteries 250b and 250c in a state where the main body 240 is assembled. Is provided.
  • the screw hole provided in the screw hole component 249 is used to screw the bus bar plate 210 to the main body 240. That is, the screw hole constituting portion 249 constitutes a fastening point.
  • the restraint plate 220 has a substantially flat plate shape.
  • the width of the restraining plate 220 is equal to the width including the flange 245 of the lower case 243, and the depth of the restraining plate 220 is equal to the depth of the lower case 243. That is, the restraint plate 220 is formed so as to cover the entire main body 240 when the main body 240 is viewed from above.
  • the restraint plate 220 is provided with a notch 223 at a position corresponding to the screw hole constituting portion 249 of the upper case 241 on the front side.
  • the restraint plate 220 has a plurality of holes 221 that penetrate the restraint plate 220 at the left and right end portions 220b.
  • a part of the plurality of holes 221 is used for fixing the lower case 243 and the restraining plate 220 by screwing. Further, another part of the plurality of holes 221 is used for screwing the main body 240 including the restraining plate 220 into the screw hole 111 provided in the housing 110 by allowing the screw to pass therethrough.
  • the restraint plate 220 has a bead 222 protruding from the upper surface 220a extending in the longitudinal direction (width direction) on the upper surface 220a.
  • the bead 222 improves the rigidity of the restraint plate 220 and the main body 240 in the longitudinal direction.
  • the bus bar plate 210 is attached to the assembled main body 240 from the front side as shown in FIG.
  • the bus bar plate 210 is made of a resin such as PBT, for example.
  • the bus bar plate 210 has a substantially rectangular plate shape, and has a plurality of bus bar plate mounting holes 211 on the outer peripheral edge 219 thereof.
  • the bus bar plate mounting hole 211 is provided on the outer peripheral edge 219 of the bus bar plate 210 at a position close to the peripheral edges of the gas vent opening and electrode opening of the bus bar plate described later.
  • the close position means a position where the distance from the peripheral edge of the gas vent opening and the electrode opening to the outer peripheral edge 219 of the bus bar plate 210 is shorter than a predetermined distance.
  • the bus bar plate mounting hole 211 is provided at a location where the distance from the outer peripheral edge 219 of the bus bar plate 210 is closest to the peripheral edge of the gas vent opening and the electrode opening.
  • the bus bar plate mounting hole 211 is provided at a position corresponding to the screw hole constituting portion 247 or 249 in the bus bar plate 210 when the bus bar plate 210 is mounted to the main body 240. That is, six bus bar plate mounting holes 211 are provided on the upper and lower long sides of the bus bar plate 210, respectively.
  • the bus bar plate 210 is attached to the main body 240 by passing a screw through each bus bar plate mounting hole 211 and screwing the screw hole provided in the screw hole constituting portion 247 or 249. That is, the bus bar plate mounting hole 211 constitutes a fastening point.
  • the bus bar plate 210 has electrode openings at positions corresponding to the electrodes of the battery 250 when attached to the main body 240. That is, the bus bar plate 210 has a total of eight electrode openings.
  • the electrode openings corresponding to the positive electrode and the negative electrode of the battery 250a are first electrode openings 212ap and second electrode openings 212an, respectively, and the electrode openings corresponding to the positive electrode and the negative electrode of the battery 250b are respectively third electrode openings.
  • the electrode openings corresponding to the positive electrode and the negative electrode of the battery 250c are designated as 212bp and the fourth electrode opening 212bn, respectively, and the electrode openings corresponding to the positive electrode and the negative electrode of the battery 250d are designated as the fifth electrode opening 212cp and the sixth electrode opening 212cn, respectively.
  • the opening for opening is defined as a seventh electrode opening 212dp and an eighth electrode opening 212dn, respectively.
  • electrode opening 212 includes a bus bar in each electrode opening 212 on the front side.
  • the bus bar plate 210 has a gas vent opening at a position corresponding to the gas escape hole 252 of the battery 250 when attached to the main body 240.
  • one gas vent opening is provided at a position corresponding to the gas escape hole 252 of the two batteries 250 in the upper and lower two stages. That is, the gas vent opening 214a is provided at a position corresponding to the gas escape hole 252 of the batteries 250a and 250b, and the gas vent opening 214b is provided at a position corresponding to the gas escape hole 252 of the batteries 250c and 250d.
  • a total of four gas vent openings may be provided in the bus bar plate 210 so as to correspond to the gas escape holes 252 of each battery on a one-to-one basis.
  • the bus bar plate mounting holes 211 are respectively corresponding to the electrode openings 212 or the gas vent openings 214a. Alternatively, they are provided at positions closest to 214b.
  • the gas vent openings 214a and 214b are not distinguished, they are collectively referred to as the gas vent openings 214.
  • the bus bar plate 210 includes a first bus bar 213a in the first electrode opening 212ap as shown in FIG.
  • the first bus bar 213a has two surfaces orthogonal to each other, one surface is held by three holding claws 215 provided on the bus bar plate 210, and the other surface is a bus bar. Projecting from the plate 210 to the front side constitutes a positive electrode terminal 230a.
  • a positive terminal 230 a configured by the first bus bar 213 a is connected to the current sensor 150.
  • the surface of the first bus bar 213a that does not constitute the positive electrode terminal 230a is connected to the positive electrode of the battery 250a by laser welding after the bus bar plate 210 is attached to the main body 240.
  • the holding claw 215 also has a function of temporarily holding the first bus bar 213a before laser welding.
  • the first bus bar 213a has a terminal 216 for connecting a voltage sensor.
  • the bus bar plate 210 includes a second bus bar 213b extending in the vertical direction across the second electrode opening 212an and the third electrode opening 212bp. That is, the second bus bar 213b connects the negative electrode of the battery 250a and the positive electrode of the battery 250b in a state where the bus bar plate 210 is attached to the main body 240.
  • the second bus bar 213 b is held by two holding claws 215 provided on the bus bar plate 210.
  • the second bus bar 213b is connected to the negative electrode of the battery 250a by laser welding at the second electrode opening 212an, and is connected to the positive electrode of the battery 250b by laser welding at the third electrode opening 212bp. Connected to.
  • the holding claw 215 also has a function of temporarily holding the second bus bar 213b before laser welding.
  • the second bus bar 213b has a terminal 216 for connecting a voltage sensor.
  • the bus bar plate 210 includes a third bus bar 213c extending in the left-right direction across the fourth electrode opening 212bn and the fifth electrode opening 212cp. That is, the third bus bar 213c connects the negative electrode of the battery 250b and the positive electrode of the battery 250c in a state where the bus bar plate 210 is attached to the main body 240.
  • the third bus bar 213 c is held by two holding claws 215 provided on the bus bar plate 210.
  • the third bus bar 213c is connected to the negative electrode of the battery 250b by laser welding at the fourth electrode opening 212bn after the bus bar plate 210 is attached to the main body 240, and is connected to the positive electrode of the battery 250c by laser welding at the fifth electrode opening 212cp. Connected to.
  • the holding claw 215 also has a function of temporarily holding the third bus bar 213c before laser welding.
  • the third bus bar 213c has terminals 216 for connecting voltage sensors on the left side of the fourth electrode opening 212bn and the right side of the fifth electrode opening 212cp, respectively.
  • the bus bar plate 210 includes a fourth bus bar 213d extending in the vertical direction across the sixth electrode opening 212cn and the seventh electrode opening 212dp. That is, the fourth bus bar 213d connects the negative electrode of the battery 250c and the positive electrode of the battery 250d in a state where the bus bar plate 210 is attached to the main body 240.
  • the fourth bus bar 213d is held by two holding claws 215 provided on the bus bar plate 210.
  • the fourth bus bar 213d is connected to the negative electrode of the battery 250c by laser welding in the sixth electrode opening 212cn after the bus bar plate 210 is attached to the main body 240, and is connected to the positive electrode of the battery 250d by laser welding in the seventh electrode opening 212dp. Connected to.
  • the holding claw 215 also has a function of temporarily holding the fourth bus bar 213d before laser welding.
  • the fourth bus bar 213d has a terminal 216 for connecting a voltage sensor.
  • the bus bar plate 210 includes a fifth bus bar 213e in the eighth electrode opening 212dn.
  • the fifth bus bar 213 e has two surfaces orthogonal to each other, one surface is held by three holding claws 215 provided on the bus bar plate 210, and the other surface is a bus bar.
  • the negative electrode terminal 230b is configured to protrude from the plate 210 to the front side.
  • the negative terminal 230 b configured by the fifth bus bar 213 e is connected to the positive terminal of the one-cell stack assembly 300.
  • the surface of the fifth bus bar 213e that does not constitute the negative electrode terminal 230b is connected to the negative electrode of the battery 250e by laser welding after the bus bar plate 210 is attached to the main body 240.
  • the holding claw 215 also has a function of temporarily holding the fifth bus bar 213e before laser welding.
  • the fifth bus bar 213e has a terminal 216 for connecting a voltage sensor.
  • the first bus bar 213a to the fifth bus bar 213e are each made of a conductive metal such as aluminum.
  • the bus bar plate 210 has a bead 217 protruding to the front side on the entire outer peripheral edge 219. Further, the bus bar plate 210 has a bead 217 protruding to the front side on the entire periphery of the gas vent opening 214.
  • the bus bar plate 210 has a bead 217 protruding to the front side in the plate portion 218 between the two electrode openings in the bus bar arranged across the two electrode openings.
  • the bus bar plate 210 has a second electrode opening in the second bus bar 213b disposed across the second electrode opening 212an and the third electrode opening 212bp, as shown in FIG.
  • a bead 217 is provided in the plate portion 218 between 212an and the third electrode opening 212bp.
  • the bus bar plate 210 is disposed between the fourth electrode opening 212bn and the fifth electrode opening 212cp in the third bus bar 213c disposed across the fourth electrode opening 212bn and the fifth electrode opening 212cp.
  • the plate portion 218 has a bead 217.
  • the bus bar plate 210 is disposed between the sixth electrode opening 212cn and the seventh electrode opening 212dp in the fourth bus bar 213d disposed across the sixth electrode opening 212cn and the seventh electrode opening 212dp.
  • the plate portion 218 has a bead 217.
  • the 4-cell stack assembly 200 includes an opening valve cover 260 at the gas vent opening 214 of the bus bar plate 210.
  • the opening valve cover 260 is made of a resin such as PBT, for example.
  • the opening valve cover 260 has openings 261 a and 261 b that cover the gas vent opening 214 on the back side in the assembled state of the four-cell stack assembly 200.
  • the opening 261a and the opening 261b are partitioned by a partition plate 265.
  • the openings 261 a and 261 b partitioned by the partition plate 265 cover the gas escape holes 252 of the batteries 250 when the opening valve cover 260 is assembled as the four-cell stack assembly 200.
  • the opening valve cover 260 has a substantially rectangular parallelepiped shape having a space 263 inside.
  • the opening valve cover 260 has a substantially cylindrical gas discharge duct 262 that communicates the internal space 263 with the outside of the opening valve cover 260.
  • a hose (not shown) is connected to the gas discharge duct 262. The gas discharged from the inside of each battery 250 flows into the space 263 inside the opening valve cover 260 from the openings 261a and 261b, merges, passes through the gas discharge duct 262, and passes through the hose connected to the gas discharge duct 262 to the outside. To be discharged.
  • the opening valve cover 260 includes a plurality of opening valve cover mounting holes 264.
  • the opening valve cover 260 passes the screw through the opening valve cover mounting hole 264 and the bus bar plate mounting hole 211 corresponding to the gas vent opening 214 of the bus bar plate 210, so that the screw hole constituting portion 247 or It attaches to the main body 240 by screwing the screw hole provided in H.249.
  • the opening valve cover mounting hole 264 is provided at a position corresponding to the bus bar plate mounting hole 211 corresponding to the gas vent opening 214 and constitutes a fastening point.
  • the outer periphery dimension in the front view of the opening valve cover 260 is a dimension which closely_contact
  • the bead 217 and the opening valve cover 260 are in close contact with each other, so that the gas discharged from the battery 250 can be prevented from leaking outside the 4-cell stack assembly 200. .
  • the opening valve cover 260 is attached to the main body 240 with screws by sandwiching a rubber seal 270 such as EPDM between the openings 261a and 261b in order to prevent gas leakage from the opening valve cover 260 to the outside.
  • a rubber seal 270 such as EPDM
  • the four-cell stack assembly 200 is configured by attaching the bus bar plate 210 to the main body 240.
  • the first to fifth bus bars 213a to 213e (hereinafter also referred to as bus bar 213) of the bus bar plate 210 are connected to the electrodes 251 of the battery 250 held in the main body 240.
  • the bus bar 213 is also referred to as an electrical connection member because it electrically connects the electrodes 251.
  • the connection between the bus bar 213 and the electrode 251 is performed by laser welding.
  • the body 240 of the four-cell stack assembly 200 has a crash bead 500.
  • the crash bead 500 is a member for holding the battery 250 in the main body 240 so that it is difficult to slip, and for maintaining the holding position of the battery 250 in the main body 240 with high accuracy.
  • the crash bead 500 is an elastic body that can urge the battery 250.
  • FIG. 11 is a diagram illustrating a main body 240 provided with a crash bead 500. In FIG. 11, only the lower case 243 and the middle case 242 are displayed. In the present embodiment, the crash bead 500 is provided in the middle case 242. In FIG. 11, crash beads 500 a to 500 f are provided in the middle case 242 as the crash beads 500.
  • the middle case 242 is disposed on both sides of the lower case 243 across the partition plate 244 so as to be in contact with the partition plate 244.
  • the error included in the thickness of the member is smaller than the error included in the length of the member. Therefore, by arranging the middle case 242 so as to be in contact with the partition plate 244 and positioning using the thickness of the partition plate 244, the position accuracy of the middle case 242 in the left-right direction can be kept high.
  • the battery 250 is disposed so as to fit inside the flange 242a of the middle case 242. As described above, the batteries 250a, 250b, 250c, and 250d are disposed in the main body 240. In FIG. 11, the batteries 250a and 250b are not displayed, the battery 250d is displayed, and the battery 250c is displayed transparently.
  • the crash beads 500a to 500f are provided on the surface of the middle case 242 on the side where the battery 250 is disposed so as to be in contact with the outer periphery of the bottom surface of the battery 250.
  • FIG. 12 is a diagram for explaining the arrangement positions of the crash beads 500a to 500f.
  • the battery 250 is represented by a broken line. This broken line shows the outer periphery of the surface where the battery 250 is in contact with the middle case 242.
  • Crash beads 500a to 500f are provided along broken lines in FIG. That is, the crash bead 500 is disposed so as to contact the outer periphery of the battery 250.
  • the crash beads 500a to 500c are provided along the side of the lower case 243 on the side surface 243c side.
  • the crash beads 500d to 500f are provided along the side on the back side opposite to the front side of the 4-cell stack assembly 200.
  • three crush beads 500 are provided on each side, but the number is not limited to this, and the number provided on each side may be different, or two or less or four or more are provided. May be.
  • the crash bead 500 is provided on the surface of the middle case 242 on the side where the battery 250b or 250c is disposed, but is similarly provided on the surface on the side where the battery 250a or 250d is disposed.
  • the crush beads 500 can be held together with high positional accuracy.
  • FIG. 13 is a diagram showing a cross section of the crash bead 500.
  • the crash bead 500 is provided so as to protrude from the middle case 242.
  • the crush bead 500 has a triangular cross section, but is not limited thereto, and may have another shape or may have a curved surface.
  • the crash bead 500 is molded integrally with the middle case 242.
  • the crash bead 500 is a separate part from the middle case 242 and is attached to the middle case 242 separately.
  • FIG. 14A and 14B are cross-sectional views showing the positional relationship between the crash bead 500 and the battery 250.
  • FIG. FIG. 14A shows a state where the crash bead 500 and the battery 250 are in contact with each other.
  • a point indicated by a black circle in FIG. 14A is a contact point N between the crash bead 500 and the battery 250.
  • the corners of each side in the cross section of the battery 250 are curved portions having a predetermined radius of curvature.
  • the crash bead 500 and the battery 250 are in contact with part of the curved portion of the battery 250.
  • the crash bead 500 is not elastically deformed and does not exert an elastic force on the battery 250.
  • FIG. 14B the broken line shows the crash bead 500 before elastic deformation, and the solid line shows the elastic crash deformed crash bead 500.
  • the crash bead 500 exerts an elastic force F on the battery 250. That is, the crash bead 500 energizes the battery 250. At this time, the elastic force F is exerted on the curved surface portion of the battery 250, so that the stress generated in the battery 250 is relieved.
  • the surface of the crash bead 500 that contacts the battery 250 has a predetermined angle with respect to the plate surface of the middle case 242. Therefore, the elastic force F is decomposed into a vertical component Fa that works in a direction perpendicular to the plate surface of the middle case 242 and a parallel component Fb that works in a direction parallel to the plate surface. That is, the battery 250 is urged in a direction parallel to the plate surface of the middle case 242 by the parallel component Fb of the elastic force F.
  • the vertical component Fa of the elastic force F is equal to the force that pushes the battery 250 to the middle case 242 side.
  • the crash bead 500 has a predetermined angle on the surface in contact with the battery 250, so that the elastic force F exerted on the battery 250 by the crash bead 500 urges the battery 250 in a direction parallel to the plate surface of the middle case 242. be able to.
  • the crash beads 500a to 500c urge the battery 250 toward the partition plate 244 of the lower case 243 by the parallel component Fb of the elastic force F.
  • the battery 250 is always pressed toward the flange 242a of the middle case 242 that is in contact with the partition plate 244 of the lower case 243.
  • the battery 250 is energized and pressed against the flange 242a of the middle case 242 positioned using the thickness of the partition plate 244 of the lower case 243, so that the positional accuracy of the battery 250 in the left-right direction is maintained. be able to.
  • the crash beads 500 d to 500 f urge the battery 250 toward the front side of the 4-cell stack assembly 200, that is, the bus bar plate 210 by the parallel component Fb of the elastic force F. . In this way, the battery 250 is always pressed toward the bus bar plate 210. In this way, the distance between the bus bar 213 of the bus bar plate 210 and the electrode 251 of the battery 250 can be within a predetermined range.
  • the crash beads 500 are provided in the middle case 242 and the battery 250 is energized, whereby the positional accuracy between the battery 250 and the bus bar plate 210 can be maintained. Then, the bus bar 213 and the electrode 251 can be electrically connected with high reliability by laser welding while maintaining the positional accuracy between the bus bar 213 of the bus bar plate 210 and the electrode 251 of the battery 250.
  • the material constituting the upper case 241, the middle case 242, and the lower case 243 is a resin such as PBT.
  • the material constituting the middle case 242 is different from that of the upper case 241 and the lower case 243.
  • the material constituting the middle case 242 is a material softer (lower elastic coefficient) than the upper case 241 and the lower case 243.
  • the material constituting the middle case 242 can be made of polypropylene (PP: polypropylene) that is softer (lower elastic modulus) than PBT.
  • the crash bead 500 molded integrally with the middle case 242 can be more easily deformed while maintaining the rigidity of the upper case 241 and the lower case 243.
  • the more easily deformable crash bead 500 can hold the battery 250 more reliably.
  • the crash bead 500 can be molded as a separate part and attached to the middle case 242.
  • the material constituting the crush bead 500 as a separate component is a material softer (lower elastic modulus) than the material constituting the upper case 241, the middle case 242, and the lower case 243. By doing so, it is possible to make only the crash bead 500 easier to deform while maintaining the rigidity of the middle case 242.
  • the crash bead 500 is provided in the middle case 242.
  • the present invention is not limited to this, and the crash bead 500 may be provided in the upper case 241 or the lower case 243.
  • the battery 250 is sandwiched between the upper case 241 and the lower case 243. Therefore, even if the crash bead 500 is provided in the upper case 241 or the lower case 243, the crash bead 500 can contact the battery 250 and urge the battery 250.
  • the crash bead 500 is preferably disposed along the outer periphery of the battery 250.
  • the crash bead 500 is attached to the upper case 241 or the lower case 243 as a separate part.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Battery Mounting, Suspending (AREA)
  • Connection Of Batteries Or Terminals (AREA)

Abstract

L'objectif de la présente invention est d'améliorer la précision de positionnement lors du soudage de barres omnibus à des électrodes d'éléments de batterie compris dans un bloc-batterie. Ce bloc-batterie est pourvu : d'éléments de batterie (250) ; d'un corps principal (240) ; et d'une plaque à barres omnibus (210) pourvue de barres omnibus (213). Une pluralité des éléments de batterie (250c, 250d) sont contenus à l'intérieur du corps principal, et des électrodes des éléments de batterie (250) sont connectées aux électrodes d'autres éléments de batterie par l'intermédiaire des barres omnibus (213). Le bloc-batterie est caractérisé en ce que : le corps principal comprend des corps élastiques (500a-500f) et une plaque de séparation (244) qui sépare et maintient les éléments de batterie (250) ; et les corps élastiques (500a-500f) poussent les éléments de batterie (250) vers la plaque de séparation (244).
PCT/JP2016/002996 2015-06-22 2016-06-21 Bloc-batterie Ceased WO2016208188A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2015125029A JP2017010780A (ja) 2015-06-22 2015-06-22 組電池
JP2015-125029 2015-06-22

Publications (1)

Publication Number Publication Date
WO2016208188A1 true WO2016208188A1 (fr) 2016-12-29

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2016/002996 Ceased WO2016208188A1 (fr) 2015-06-22 2016-06-21 Bloc-batterie

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JP (1) JP2017010780A (fr)
WO (1) WO2016208188A1 (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022254937A1 (fr) * 2021-06-04 2022-12-08 株式会社Ｇｓユアサ Dispositif de stockage d'électricité

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013016351A (ja) * 2011-07-04 2013-01-24 Hitachi Vehicle Energy Ltd 電池モジュールおよび電源装置
JP2013054869A (ja) * 2011-09-01 2013-03-21 Toshiba Corp 組電池およびその製造方法
JP2013242967A (ja) * 2012-05-17 2013-12-05 Denso Corp 組電池

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2940755B1 (fr) * 2012-12-28 2017-10-25 Hitachi Automotive Systems, Ltd. Batterie assemblée

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013016351A (ja) * 2011-07-04 2013-01-24 Hitachi Vehicle Energy Ltd 電池モジュールおよび電源装置
JP2013054869A (ja) * 2011-09-01 2013-03-21 Toshiba Corp 組電池およびその製造方法
JP2013242967A (ja) * 2012-05-17 2013-12-05 Denso Corp 組電池

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