WO2016208188A1 - Battery pack - Google Patents

Battery pack 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
Application number
PCT/JP2016/002996
Other languages
French (fr)
Japanese (ja)
Inventor
季之 本橋
哲 佐久間
祐一郎 野村
Original Assignee
カルソニックカンセイ株式会社
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 カルソニックカンセイ株式会社 filed Critical カルソニックカンセイ株式会社
Publication of WO2016208188A1 publication Critical patent/WO2016208188A1/en

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    • 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.

Abstract

The purpose of the present invention is to improve positional accuracy when welding busbars to electrodes of battery cells included in a battery pack. This battery pack is provided with: battery cells (250); a main body (240); and a busbar plate (210) provided with busbars (213). A plurality of the battery cells (250c, 250d) are held inside the main body, and electrodes of the battery cells (250) are connected to the electrodes of other battery cells via the busbars (213). The battery pack is characterized in that: the main body includes elastic bodies (500a-500f), and a partition plate (244) which partitions and holds the battery cells (250); and the elastic bodies (500a-500f) impel the battery cells (250) towards the partition plate (244).

Description

組電池Assembled battery 関連出願へのクロスリファレンスCross-reference to related applications
　本出願は、日本国特許出願２０１５－１２５０２９号（２０１５年６月２２日出願）の優先権を主張するものであり、当該出願の開示全体を、ここに参照のために取り込む。 This application claims the priority of Japanese Patent Application No. 2015-125029 (filed on June 22, 2015), the entire disclosure of which is incorporated herein by reference.
　本発明は、複数の電池セルと本体とバスバを有するバスバプレートとを備える組電池に関する。 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.
　従来、組電池において、電池セルを本体に配置して固定する際に電池セル及びスタック部材の寸法バラツキの吸収構造として合成樹脂等の充填剤を用いる構造とされている（特許文献１）。 Conventionally, 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).
特開２０１０－１５７６０号公報JP 2010-15760 A
　しかしながらこのような構造の組電池とすると、電池セルを本体に固定した状態で電池セルの電極にバスバ（電気接続部材）を溶接する際に、電極とバスバとの位置精度が問題となる。 However, when an assembled battery having such a structure is used, when the bus bar (electrical connection member) is welded to the electrode of the battery cell while the battery cell is fixed to the main body, the positional accuracy between the electrode and the bus bar becomes a problem.
　かかる事情に鑑みてなされた本発明の目的は、組電池に含まれる電池セルの電極にバスバを溶接する際の位置精度を向上することにある。 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.
　上記課題を解決するために、本発明の第1の観点に係る組電池は、
　電池セルと、本体と、バスバを有するバスバプレートとを備え、
　複数の前記電池セルが前記本体内に保持され、前記電池セルの電極が前記バスバを介して他の電池セルの電極に接続された組電池において、
　前記本体は、弾性体と、前記電池セルを仕切って保持する仕切板とを含み、
　前記弾性体は、前記電池セルを前記仕切板へ向けて付勢することを特徴とする。 In order to solve the above problems, 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,
In the assembled battery in which a plurality of the battery cells are held in the main body, and the electrode of the battery cell is connected to the electrode of another battery cell via the 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.
　また、本発明の第2の観点に係る組電池は、
　前記本体は、下部ケースと中部ケースと上部ケースとを含み、
　前記弾性体は、前記中部ケースに設けられ、
　前記仕切板は、前記下部ケースに設けられ、
　前記電池セルは、前記下部ケースと前記中部ケースとの間、又は、前記中部ケースと前記上部ケースとの間に挟持されることを特徴とする。 Further, the assembled battery according to the second aspect of the present invention,
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.
　また、本発明の第3の観点に係る組電池は、前記弾性体は、前記下部ケース及び上部ケースよりも柔らかい材料で構成されることを特徴とする。 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.
　また、本発明の第4の観点に係る組電池は、前記弾性体は、前記電池セルの曲面部において前記電池セルに接することを特徴とする。 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.
　また、本発明の第5の観点に係る組電池は、前記弾性体は、前記電池セルを前記バスバプレートへ向けて付勢することを特徴とする。 Further, in the battery pack according to the fifth aspect of the present invention, the elastic body biases the battery cell toward the bus bar plate.
　本発明の第1の観点に係る組電池によれば、組電池に含まれる電池セルの電極にバスバを溶接する際の位置精度を向上できる。 According to the assembled battery according to the first aspect of the present invention, the positional accuracy when welding the bus bar to the electrode of the battery cell included in the assembled battery can be improved.
　本発明の第2の観点に係る組電池によれば、中部ケースの上下に保持される電池セルの位置精度を一括して向上できる。 According to the assembled battery according to the second aspect of the present invention, the positional accuracy of the battery cells held above and below the middle case can be improved collectively.
　本発明の第3の観点に係る組電池によれば、より確実に電池セルを保持できる。 The battery assembly according to the third aspect of the present invention can hold the battery cell more reliably.
　本発明の第4の観点に係る組電池によれば、電池セルに掛かる応力を緩和できる。 According to the assembled battery according to the fourth aspect of the present invention, the stress applied to the battery cell can be relaxed.
　本発明の第5の観点に係る組電池によれば、電池セルの電極とバスバとの間隔を所定の範囲内とすることができる。 According to the assembled battery according to the fifth aspect of the present invention, the distance between the electrode of the battery cell and the bus bar can be within a predetermined range.
本発明の一実施形態に係る電源装置の内部を示す外観斜視図である。It is an external appearance perspective view which shows the inside of the power supply device which concerns on one Embodiment of this invention. 図１に示す電源装置の内部の部品ごとの分解斜視図である。It is a disassembled perspective view for every component inside the power supply device shown in FIG. 図１に示す電源装置を含む電源システムの概略を示す機能ブロック図である。It is a functional block diagram which shows the outline of the power supply system containing the power supply device shown in FIG. 図１に示す電源装置が備える４セルスタックアセンブリの上部側の外観斜視図である。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. 図１に示す電源装置が備える４セルスタックアセンブリの下部側の外観斜視図である。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. 図４に示す４セルスタックアセンブリの本体に対するバスバプレートの取付けの状態を示す図である。It is a figure which 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. 図４に示す４セルスタックアセンブリの本体の分解組立図である。FIG. 5 is an exploded view of the main body of the four-cell stack assembly shown in FIG. 4. 図４に示す４セルスタックアセンブリが備えるバスバプレートの正面図である。It is a front view of the bus bar plate with which the 4 cell stack assembly shown in FIG. 4 is provided. 図８に示すバスバプレートにおいて、バスバを外した状態を示す図である。It is a figure which shows the state which removed the bus bar in the bus bar plate shown in FIG. 図６に示す開口弁カバーの背面側の外観斜視図である。It is an external appearance perspective view of the back side of the opening valve cover shown in FIG. クラッシュビードを設けた４セルスタックアセンブリの本体を示す図である。It is a figure which shows the main body of the 4-cell stack assembly which provided the crash bead. 中部ケースにおけるクラッシュビードの配置位置を示す図である。It is a figure which shows the arrangement position of the crash bead in a middle case. クラッシュビードの断面形状を示す図である。It is a figure which shows the cross-sectional shape of a crash bead. クラッシュビードとバッテリとが接した状態を示す図である。It is a figure which shows the state which the crash bead and the battery contacted. クラッシュビードがバッテリを付勢している状態を示す図である。It is a figure which shows the state which has urged | biased the battery by the crash bead.
　以下、本発明に係る組電池の一実施形態について、図面を参照しながら詳細に説明する。 Hereinafter, an embodiment of an assembled battery according to the present invention will be described in detail with reference to the drawings.
（実施形態）
　一実施形態に係る組電池は、車両等に電気を供給する電源装置の一部に組み込まれる。そこで、一実施形態に係る電源装置について説明したうえで、一実施形態に係る組電池について説明する。一実施形態に係る組電池は、４つのバッテリ（電池セル）２５０を組み込んだ４セルスタックアセンブリ２００である。 (Embodiment)
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.
［電源装置］
　図１は、本発明の一実施形態に係る電源装置の内部を示す外観斜視図である。電源装置１００は、上面１１０ａ側が開口となっている筐体１１０と、筐体１１０の上面１１０ａ側を覆うことが可能な図示しない蓋とにより構成され、図１は、蓋を外した状態の電源装置１００を示している。筐体１１０は、例えばアルミニウム等の金属で構成される。筐体１１０と蓋とは、エチレンプロピレンジエン（ＥＰＤＭ：ethylene-propylene-diene monomer）ゴム等のゴム製のシールを挟んで、ねじ又はクランプ等の適宜の方法により接合され、筐体１１０の上面１１０ａ側が蓋で覆われることにより、電源装置１００を構成する。電源装置１００は内部に必要な部品を備え、これらの部品は、例えば電気的に接続されているが、図１では、理解を容易にするため、配線の記載を省略している。本実施形態において、電源装置１００は、内燃機関を備えた車両、あるいは内燃機関と電動機との双方の動力で走行可能なハイブリッド車等の車両に搭載されて使用されるものとして説明するが、電源装置１００の用途は車両で使用されるものに限られない。 [Power supply]
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. In this embodiment, 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.
　図２は、図１に示す電源装置１００の内部の部品ごとの分解斜視図である。図１及び図２に示すように、筐体１１０内には、１つの面にバスバプレート２１０を備える略直方体形状の４セルスタックアセンブリ２００と、１つの面にバスバプレート３１０を備える略直方体形状の１セルスタックアセンブリ３００とが、バスバプレート２１０とバスバプレート３１０とが互いに向かい合うように配置されている。本実施形態において、４セルスタックアセンブリ２００と、１セルスタックアセンブリ３００とは、それぞれ上部に備える拘束板２２０及び３２０に設けられた穴２２１及び３２１に、ねじを貫通させて、当該ねじを筐体１１０内部に設けられたねじ穴１１１にねじ止めすることにより、筐体１１０に固定される。 FIG. 2 is an exploded perspective view of each component inside the power supply apparatus 100 shown in FIG. As shown in FIGS. 1 and 2, 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. In the present embodiment, 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.
　４セルスタックアセンブリ２００は、バスバプレート２１０から突出する正極端子２３０ａ及び負極端子２３０ｂを有する。また、１セルスタックアセンブリ３００は、バスバプレート３１０から突出する正極端子３３０ａ及び負極端子３３０ｂを有する。４セルスタックアセンブリ２００と、１セルスタックアセンブリ３００とを筐体１１０に組み込んだ状態において、４セルスタックアセンブリ２００の負極端子２３０ｂと、１セルスタックアセンブリ３００の正極端子３３０ａとは接触している。 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.
　電源装置１００は、４セルスタックアセンブリ２００と、１セルスタックアセンブリ３００とを筐体１１０に組み込んだ状態において、正極端子２３０ａ、負極端子２３０ｂ、正極端子３３０ａ及び負極端子３３０ｂとを、底面１１０ｂ側から支持するバスバ固定ターミナル１２０を備える。 In a state where the four-cell stack assembly 200 and the one-cell stack assembly 300 are assembled in the housing 110, 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.
　１セルスタックアセンブリ３００の上部には、バッテリコントローラ（ＬＢＣ）１３０と、ヒュージブルリンク１４０が配置されている。ＬＢＣ１３０及びヒュージブルリンク１４０は、適宜な方法で、１セルスタックアセンブリ３００の上部に固定されている。 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.
　また、筐体１１０の底面１１０ｂにおいて、４セルスタックアセンブリ２００と、１セルスタックアセンブリ３００とが配置されていない箇所に、電流センサ１５０と、ＩＣＲリレー（inrush current reduction relay）１６０と、ＭＯＳＦＥＴ（metal oxide semiconductor field effect transistor）１７０と、ターミナルポスト１８０とを備える。電流センサ１５０、ＩＣＲリレー１６０、ＭＯＳＦＥＴ１７０及びターミナルポスト１８０は、適宜な方法で、筐体１１０の底面１１０ｂに固定されている。ターミナルポスト１８０は、例えば２つの端子を有する。 Further, on the bottom surface 110b of the casing 110, 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. oxide (semiconductor / field / effect / transistor) 170 and a terminal post 180. 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.
　図３は、図１に示す電源装置１００を含む電源システムの概略を示す機能ブロック図である。電源システム４００は、電源装置１００と、オルタネータ４１０と、スタータ４２０と、第２の二次電池４３０と、負荷４４０と、スイッチ４５０と、制御部４６０とを備える。電源装置１００は、４セルスタックアセンブリ２００と１セルスタックアセンブリ３００とを含んで構成される第１の二次電池１９０を含む。第１の二次電池１９０、オルタネータ４１０、スタータ４２０、第２の二次電池４３０及び負荷４４０は、並列に接続される。 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.
　電源装置１００において、ＩＣＲリレー１６０と、電流センサ１５０と、第１の二次電池１９０と、ヒュージブルリンク１４０とは、この順序で直列に接続される。また、電源装置１００において、ターミナルポスト１８０の一方の端子１８０ａは、オルタネータ４１０に接続され、他方の端子１８０ｂは、負荷４４０に接続される。ＭＯＳＦＥＴ１７０は、第２の二次電池４３０及び負荷４４０と直列に接続される。 In the power supply apparatus 100, 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. In the power supply apparatus 100, 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.
　ＩＣＲリレー１６０は、第１の二次電池１９０を、電源システム４００における電源装置１００外の各構成要素と並列に接続し又は切り離すスイッチとして機能する。 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.
　電流センサ１５０は、適宜な構造を有し、適宜な方式で第１の二次電池１９０を含む回路に流れる電流を測定する。 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.
　第１の二次電池１９０は、上述の通り４セルスタックアセンブリ２００と１セルスタックアセンブリ３００とを含んで構成される、例えばリチウムイオン電池又はニッケル水素電池等の二次電池である。第１の二次電池１９０は、正極側が電流センサ１５０に接続され、負極側がヒュージブルリンク１４０に接続される。つまり、本実施形態において、４セルスタックアセンブリ２００の正極端子２３０ａが電流センサ１５０に接続され、１セルスタックアセンブリ３００の負極端子３３０ｂがヒュージブルリンク１４０に接続される。 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.
　ヒュージブルリンク１４０は、ヒューズ本体と、ヒューズ本体を収容保持する絶縁樹脂製のハウジングと、ハウジングを覆う絶縁樹脂製のカバーとにより構成され、過電流が生じた場合に溶断する。 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.
　ＭＯＳＦＥＴ１７０は、第２の二次電池４３０及び負荷４４０を、電源システム４００における他の構成要素と並列に接続し又は切り離すスイッチとして機能する。 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.
　電源装置１００において、ＬＢＣ１３０は、第１の二次電池１９０に接続され、第１の二次電池１９０の状態を推定する。ＬＢＣ１３０は、例えば第１の二次電池１９０の充電状態（ＳＯＣ：state of charge）を推定する。 In the power supply apparatus 100, 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.
　オルタネータ４１０は、発電機であって、車両のエンジンに機械的に接続される。オルタネータ４１０は、エンジンの駆動によって発電を行う。オルタネータ４１０がエンジンの駆動によって発電した電力は、レギュレータで出力電圧を調整されて、電源装置１００が備える第１の二次電池１９０、第２の二次電池４３０、負荷４４０及び図示しない車両の補機に供給され得る。またオルタネータ４１０は、車両の減速時等に回生によって発電可能である。オルタネータ４１０が回生発電した電力は、第１の二次電池１９０及び第２の二次電池４３０の充電に使用される。 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.
　スタータ４２０は、例えばセルモータを含んで構成され、第１の二次電池１９０及び第２の二次電池４３０の少なくとも一方からの電力供給を受けて、車両のエンジンを始動させる。 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.
　第２の二次電池４３０は、例えば鉛蓄電池により構成され、負荷４４０に電力を供給する。 The second secondary battery 430 is composed of, for example, a lead storage battery and supplies power to the load 440.
　負荷４４０は、例えば車両に備えられたオーディオ、エアコンディショナ、及びナビゲーションシステム等を含み、供給された電力を消費して動作する。負荷４４０は、エンジン駆動の停止中に第１の二次電池１９０から電力供給を受けて動作し、エンジン駆動中にオルタネータ４１０及び第２の二次電池４３０から電力供給を受けて動作する。 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.
　スイッチ４５０は、スタータ４２０と直列に接続される。スイッチ４５０は、スタータ４２０を他の構成要素と並列に接続し又は切り離す。 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.
　制御部４６０は、電源システム４００の全体の動作を制御する。制御部４６０は、例えば車両のＥＣＵ（Electric Control Unit又はEngine Control Unit）により構成される。制御部４６０は、スイッチ４５０、ＩＣＲリレー１６０及びＭＯＳＦＥＴ１７０の動作をそれぞれ制御して、オルタネータ４１０、第１の二次電池１９０及び第２の二次電池４３０による電力供給、並びに第１の二次電池１９０及び第２の二次電池４３０の充電を行なう。 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.
［４セルスタックアセンブリ（組電池）］
　次に、図４から図１０を参照しながら、本発明の一実施形態に係る組電池である４セルスタックアセンブリ２００について、詳細に説明する。図４は、図１に示す電源装置１００が備える４セルスタックアセンブリ２００の上部側の外観斜視図であり、図５は、図１に示す電源装置１００が備える４セルスタックアセンブリ２００の下部側の外観斜視図である。また、図６は、図４に示す４セルスタックアセンブリ２００の本体に対するバスバプレート２１０の取付けの状態を示す図である。図７は、図４に示す４セルスタックアセンブリ２００の本体の分解組立図である。図８は、図４に示す４セルスタックアセンブリ２００が備えるバスバプレート２１０、すなわち本発明の一実施形態に係るバスバプレート２１０の正面図であり、図９は、図８に示すバスバプレート２１０において、バスバを外した状態を示す図である。また、図１０は、図６に示す開口弁カバーの背面側の外観斜視図である。 [4-cell stack assembly (assembled battery)]
Next, a 4-cell stack assembly 200 that is an assembled battery according to an embodiment of the present invention will be described in detail with reference to 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, and 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. 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.
　４セルスタックアセンブリ２００は、図６に示すように、バッテリ２５０ａ、２５０ｂ、２５０ｃ及び２５０ｄを保持する本体２４０に、バスバプレート２１０を取り付けることにより構成される。バスバプレート２１０は、バッテリ２５０ａ、２５０ｂ、２５０ｃ及び２５０ｄの電極を覆うように、締結点において、本体２４０に取り付けられる。以下、４セルスタックアセンブリ２００において、バスバプレート２１０が取り付けられる側を正面とする。本実施形態において、本体２４０は、上下２段及び左右２列に、合計４つのバッテリ２５０ａ、２５０ｂ、２５０ｃ及び２５０ｄを保持する。以下、本体２４０の正面視において、左下に配置されたバッテリを２５０ａ、左上に配置されたバッテリを２５０ｂ、右上に配置されたバッテリを２５０ｃ、右下に配置されたバッテリを２５０ｄとし、これらを区別しない場合には、まとめてバッテリ２５０と記載する。 As shown in FIG. 6, 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. Hereinafter, in the 4-cell stack assembly 200, the side to which the bus bar plate 210 is attached is the front. In the present embodiment, 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. Hereinafter, in the front view of the main body 240, 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, and the battery arranged at the lower right is 250d. If not, they are collectively referred to as battery 250.
　本体２４０は、図７に示すように、上部ケース２４１と、下部ケース２４３とにより、バッテリ２５０を挟持し、上部ケース２４１の上部側に拘束板２２０を取り付けることにより、構成される。上下２段のバッテリ２５０間には、中部ケース２４２が挿入されている。本体２４０は、左右方向の幅よりも、前後方向の奥行きが短い、略直方体形状である。上部ケース２４１、中部ケース２４２及び下部ケース２４３は、それぞれポリブチレンテレフタレート（ＰＢＴ：polybutylene terephthalate）等の樹脂により構成され、拘束板２２０は、アルミニウムなどの金属により構成される。 As shown in FIG. 7, 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.
　バッテリ２５０は、例えばリチウムイオン電池又はニッケル水素電池等の二次電池である。バッテリ２５０は、各電極２５１が正面側となるように、本体２４０に保持される。本実施形態において、各バッテリ２５０は、本体２４０の正面視において、それぞれ両端に正極及び負極を有する。本体２４０の正面視において、下段のバッテリ２５０ａ及び２５０ｄは右端に正極が配置され、上段のバッテリ２５０ｂ及び２５０ｃは、左端に正極が配置されるように、本体２４０に保持される。また、各バッテリ２５０には、本体２４０の正面視において、正極及び負極の中央に、バッテリ２５０内部で発生するガスを外部に排出するためのガス逃がし孔２５２が設けられている。 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. In the present embodiment, each battery 250 has a positive electrode and a negative electrode at both ends in the front view of the main body 240. When the main body 240 is viewed from the front, 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.
　下部ケース２４３は、正面視において、バッテリ２５０を収容可能な空間２４３ａを有する凹形状であり、中央には、左右に収容したバッテリ２５０を仕切るための仕切板２４４を有する。下部ケース２４３は、左右の側面２４３ｃの上端に、下部ケース２４３の外側（空間２４３ａの反対側）に突出するフランジ２４５を有する。 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.
　フランジ２４５には、フランジ２４５を貫通する複数の穴２４５ａが設けられている。これらの穴２４５ａは、本体２４０を組み立てた状態において、拘束板２２０に設けられた穴２２１に対応する位置に設けられている。複数の穴２４５ａの一部は、下部ケース２４３と拘束板２２０とをねじ止めすることにより固定するために使用される。また、複数の穴２４５ａの他の一部は、ねじを貫通させて、拘束板２２０を含む本体２４０を、筐体１１０内部に設けられたねじ穴１１１にねじ止めするために使用される。 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.
　また、下部ケース２４３は、図５に示すように、底面２４３ｂに、長手方向（幅方向）に延在する、底面２４３ｂから突出したビード２４６を有する。ビード２４６は、底面２４３ｂから側面２４３ｃを通ってフランジ２４５の高さ方向にまで延在する。ビード２４６により、下部ケース２４３及び本体２４０の長手方向の剛性が向上する。 Further, as shown in FIG. 5, 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.
　また、下部ケース２４３は、底面２４３ｂに、正面側が開口となっている複数のねじ穴構成部２４７を有する。ねじ穴構成部２４７は、下部ケース２４３の底面２４３ｂから下方向に突出して設けられている。本実施形態において、下部ケース２４３は、６つのねじ穴構成部２４７を有する。具体的には、６つのねじ穴構成部２４７は、本体２４０が組み立てられた状態において、下段のバッテリ２５０ａ及び２５０ｄの合計４つの電極２５１及び合計２つのガス逃がし孔２５２に、それぞれ最も近接する位置に設けられる。ねじ穴構成部２４７に設けられたねじ穴は、バスバプレート２１０を本体２４０にねじ止めするために使用される。つまり、ねじ穴構成部２４７は、締結点を構成する。 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. In the present embodiment, 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.
　中部ケース２４２は、上下２段に配置されるバッテリ２５０を仕切るための板状部材である。中部ケース２４２は、本体２４０において上下に配置されたバッテリ２５０の対ごとに挿入される。つまり、本実施形態の本体２４０は、２つの中部ケース２４２を備える。各中部ケース２４２の幅は、下部ケース２４３の側面２４３ｃから仕切板２４４までの内幅に等しい。中部ケース２４２は、下部ケース２４３の空間２４３ａに安定して配置されるように、左右にフランジ２４２ａを備え、正面視でＨ形に形成されている。フランジ２４２ａは、空間２４３ａにおいて、バッテリ２５０を安定して保持する機能も有する。 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.
　上部ケース２４１は、下部ケース２４３に２段に収容されたバッテリ２５０の上部に載置される。上部ケース２４１の幅は、下部ケース２４３の側面２４３ｃ間の内幅に等しい。上部ケース２４１は、左右に、下部ケースの底面２４３ｂ側に突出したフランジ２４１ａを有し、中央に、下部ケースの底面２４３ｂ側に突出した仕切板２４１ｂを有する。上部ケース２４１は、左右のフランジ２４１ａにより、下部ケース２４３の空間２４３ａ内に安定して配置される。また、上部ケース２４１は、左右のフランジ２４１ａと、仕切板２４１ｂとにより、空間２４３ａにおいて、バッテリ２５０を安定して保持できる。 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.
　上部ケース２４１は、上面２４１ｃに、短手方向（奥行方向）に延在する、上面２４１ｃから突出したビード２４８を有する。ビード２４８により、上部ケース２４１及び本体２４０の短手方向の剛性が向上する。 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.
　また、上部ケース２４１は、上面２４１ｃに、正面側が開口となっている複数のねじ穴構成部２４９を有する。ねじ穴構成部２４９は、上面２４１ｃから上方向に突出して設けられている。本実施形態において、上部ケース２４１は、６つのねじ穴構成部２４９を有する。具体的には、６つのねじ穴構成部２４９は、本体２４０が組み立てられた状態において、上段のバッテリ２５０ｂ及び２５０ｃの合計４つの電極２５１及び合計２つのガス逃がし孔２５２に、それぞれ最も近接する位置に設けられる。ねじ穴構成部２４９に設けられたねじ穴は、バスバプレート２１０を本体２４０にねじ止めするために使用される。つまり、ねじ穴構成部２４９は、締結点を構成する。 Moreover, 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. In the present embodiment, 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.
　拘束板２２０は、略平板状である。拘束板２２０の幅は、下部ケース２４３のフランジ２４５を含む幅と等しく、拘束板２２０の奥行きは、下部ケース２４３の奥行きと等しい。つまり、拘束板２２０は、本体２４０の上面視において、本体２４０の全体を覆うように形成される。拘束板２２０は、正面側において、上部ケース２４１のねじ穴構成部２４９に対応する位置に、切欠き２２３が設けられている。切欠き２２３により、拘束板２２０を上部ケース２４１上に固定する際に、上面２４１ｃから上方向に突出するねじ穴構成部２４９と拘束板２２０との干渉を避けることができ、拘束板２２０と上部ケース２４１の上面２４１ｃとを密着させやすくなる。 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. When the restraint plate 220 is fixed on the upper case 241 by the notch 223, interference between the restraint plate 220 and the screw hole constituting portion 249 protruding upward from the upper surface 241c can be avoided. It becomes easy to make the upper surface 241c of the case 241 adhere.
　拘束板２２０は、左右の端部２２０ｂに、拘束板２２０を貫通する複数の穴２２１を有する。複数の穴２２１の一部は、下部ケース２４３と拘束板２２０とをねじ止めすることにより固定するために使用される。また、複数の穴２２１の他の一部は、ねじを貫通させて、拘束板２２０を含む本体２４０を、筐体１１０内部に設けられたねじ穴１１１にねじ止めするために使用される。 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.
　拘束板２２０は、上面２２０ａに、長手方向（幅方向）に延在する、上面２２０ａから突出したビード２２２を有する。ビード２２２により、拘束板２２０及び本体２４０の長手方向の剛性が向上する。 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.
　バスバプレート２１０は、組み立てられた本体２４０に、図６に示すように正面側から取り付けられる。バスバプレート２１０は、例えばＰＢＴ等の樹脂により構成される。 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.
　バスバプレート２１０は、図８に示すように、平板状の略長方形状であり、その外周縁２１９に複数のバスバプレート取付穴２１１を有する。バスバプレート取付穴２１１は、バスバプレート２１０の外周縁２１９において、後述するバスバプレートが有するガス抜き開口及び電極用開口の周縁に対して近接する位置に設けられる。ここで、近接する位置とは、ガス抜き開口及び電極用開口の周縁から、バスバプレート２１０の外周縁２１９との距離が所定の距離よりも短い位置をいう。バスバプレート取付穴２１１は、ガス抜き開口及び電極用開口の周縁から、バスバプレート２１０の外周縁２１９との距離が最も近い箇所に設けられることが特に好ましい。本実施形態において、バスバプレート取付穴２１１は、バスバプレート２１０において、バスバプレート２１０を本体２４０に取り付けた際に、ねじ穴構成部２４７又は２４９に対応する位置に設けられる。つまり、バスバプレート取付穴２１１は、バスバプレート２１０の上下の長辺に、それぞれ６つ設けられる。バスバプレート２１０は、ねじを、各バスバプレート取付穴２１１を貫通させて、ねじ穴構成部２４７又は２４９に設けられたねじ穴にねじ止めを行うことにより、本体２４０に取り付けられる。つまり、バスバプレート取付穴２１１は、締結点を構成する。 As shown in FIG. 8, 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. Here, 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. It is particularly preferable that 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. In the present embodiment, 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.
　バスバプレート２１０は、図９に示すように、本体２４０に取り付けられた際にバッテリ２５０の各電極に対応する位置に、電極用開口を有する。つまり、バスバプレート２１０は、合計８つの電極用開口を有する。バッテリ２５０ａの正極及び負極に対応する電極用開口を、それぞれ第１電極用開口２１２ａｐ及び第２電極用開口２１２ａｎとし、バッテリ２５０ｂの正極及び負極に対応する電極用開口を、それぞれ第３電極用開口２１２ｂｐ及び第４電極用開口２１２ｂｎとし、バッテリ２５０ｃの正極及び負極に対応する電極用開口を、それぞれ第５電極用開口２１２ｃｐ及び第６電極用開口２１２ｃｎとし、バッテリ２５０ｄの正極及び負極に対応する電極用開口を、それぞれ第７電極用開口２１２ｄｐ及び第８電極用開口２１２ｄｎとする。以下、これらの電極用開口を区別しない場合には、まとめて電極用開口２１２と記載する。バスバプレート２１０は、正面側において、各電極用開口２１２にバスバを備える。 As shown in FIG. 9, 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. Hereinafter, when these electrode openings are not distinguished, they are collectively referred to as an electrode opening 212. The bus bar plate 210 includes a bus bar in each electrode opening 212 on the front side.
　また、バスバプレート２１０は、本体２４０に取り付けられた際にバッテリ２５０のガス逃がし孔２５２に対応する位置に、ガス抜き開口を有する。本実施形態では、上下２段の２つのバッテリ２５０のガス逃がし孔２５２に対応する位置に、１つのガス抜き開口が設けられている。つまり、ガス抜き開口２１４ａは、バッテリ２５０ａ及び２５０ｂのガス逃がし孔２５２に対応する位置に設けられ、ガス抜き開口２１４ｂは、バッテリ２５０ｃ及び２５０ｄのガス逃がし孔２５２に対応する位置に設けられる。なお、ガス抜き開口は、各バッテリのガス逃がし孔２５２と１対１に対応するように、バスバプレート２１０に合計４つ設けられていてもよい。 In addition, 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. In the present embodiment, 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.
　本体２４０における、上述したねじ穴構成部２４７及び２４９と、バッテリ２５０の電極２５１及びガス逃がし孔２５２との位置関係から、バスバプレート取付穴２１１は、それぞれ対応する電極用開口２１２又はガス抜き開口２１４ａ若しくは２１４ｂに、それぞれ最も近接する位置に設けられる。以下、ガス抜き開口２１４ａ及び２１４ｂを区別しない場合には、まとめてガス抜き開口２１４という。 Due to the positional relationship between the above-described screw hole constituting portions 247 and 249 and the electrode 251 and gas escape hole 252 of the battery 250 in the main body 240, 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. Hereinafter, when the gas vent openings 214a and 214b are not distinguished, they are collectively referred to as the gas vent openings 214.
　バスバプレート２１０は、図８に示すように、第１電極用開口２１２ａｐに、第１バスバ２１３ａを備える。第１バスバ２１３ａは、図６に示すように、互いに直交する２つの面を有し、一方の面は、バスバプレート２１０に設けられた３つの保持爪２１５によって保持され、他方の面は、バスバプレート２１０から正面側に突出して、正極端子２３０ａを構成する。第１バスバ２１３ａにより構成される正極端子２３０ａは、電流センサ１５０に接続される。第１バスバ２１３ａにおいて正極端子２３０ａを構成しない面は、バスバプレート２１０が本体２４０に取り付けられた後、レーザ溶接によりバッテリ２５０ａの正極に接続される。保持爪２１５は、レーザ溶接前に第１バスバ２１３ａを仮保持する機能も有する。また、第１バスバ２１３ａは、電圧センサを接続するための端子２１６を有する。 The bus bar plate 210 includes a first bus bar 213a in the first electrode opening 212ap as shown in FIG. As shown in FIG. 6, 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.
　また、バスバプレート２１０は、図８に示すように、第２電極用開口２１２ａｎと第３電極用開口２１２ｂｐとにまたがる、上下方向に延在する第２バスバ２１３ｂを備える。つまり、第２バスバ２１３ｂは、バスバプレート２１０が本体２４０に取り付けられた状態において、バッテリ２５０ａの負極と、バッテリ２５０ｂの正極とを接続する。第２バスバ２１３ｂは、バスバプレート２１０に設けられた２つの保持爪２１５によって保持される。第２バスバ２１３ｂは、バスバプレート２１０が本体２４０に取り付けられた後、第２電極用開口２１２ａｎにおいてレーザ溶接によりバッテリ２５０ａの負極に接続され、第３電極用開口２１２ｂｐにおいてレーザ溶接によりバッテリ２５０ｂの正極に接続される。保持爪２１５は、レーザ溶接前に第２バスバ２１３ｂを仮保持する機能も有する。また、第２バスバ２１３ｂは、電圧センサを接続するための端子２１６を有する。 Further, as shown in FIG. 8, 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. After the bus bar plate 210 is attached to the main body 240, 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.
　また、バスバプレート２１０は、図８に示すように、第４電極用開口２１２ｂｎと第５電極用開口２１２ｃｐとにまたがる、左右方向に延在する第３バスバ２１３ｃを備える。つまり、第３バスバ２１３ｃは、バスバプレート２１０が本体２４０に取り付けられた状態において、バッテリ２５０ｂの負極と、バッテリ２５０ｃの正極とを接続する。第３バスバ２１３ｃは、バスバプレート２１０に設けられた２つの保持爪２１５によって保持される。第３バスバ２１３ｃは、バスバプレート２１０が本体２４０に取り付けられた後、第４電極用開口２１２ｂｎにおいてレーザ溶接によりバッテリ２５０ｂの負極に接続され、第５電極用開口２１２ｃｐにおいてレーザ溶接によりバッテリ２５０ｃの正極に接続される。保持爪２１５は、レーザ溶接前に第３バスバ２１３ｃを仮保持する機能も有する。また、第３バスバ２１３ｃは、電圧センサを接続するための端子２１６を、第４電極用開口２１２ｂｎの左側及び第５電極用開口２１２ｃｐの右側にそれぞれ有する。 As shown in FIG. 8, 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.
　また、バスバプレート２１０は、図８に示すように、第６電極用開口２１２ｃｎと第７電極用開口２１２ｄｐとにまたがる、上下方向に延在する第４バスバ２１３ｄを備える。つまり、第４バスバ２１３ｄは、バスバプレート２１０が本体２４０に取り付けられた状態において、バッテリ２５０ｃの負極と、バッテリ２５０ｄの正極とを接続する。第４バスバ２１３ｄは、バスバプレート２１０に設けられた２つの保持爪２１５によって保持される。第４バスバ２１３ｄは、バスバプレート２１０が本体２４０に取り付けられた後、第６電極用開口２１２ｃｎにおいてレーザ溶接によりバッテリ２５０ｃの負極に接続され、第７電極用開口２１２ｄｐにおいてレーザ溶接によりバッテリ２５０ｄの正極に接続される。保持爪２１５は、レーザ溶接前に第４バスバ２１３ｄを仮保持する機能も有する。また、第４バスバ２１３ｄは、電圧センサを接続するための端子２１６を有する。 Further, as shown in FIG. 8, 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.
　また、バスバプレート２１０は、図８に示すように、第８電極用開口２１２ｄｎに、第５バスバ２１３ｅを備える。第５バスバ２１３ｅは、図６に示すように、互いに直交する２つの面を有し、一方の面は、バスバプレート２１０に設けられた３つの保持爪２１５によって保持され、他方の面は、バスバプレート２１０から正面側に突出して、負極端子２３０ｂを構成する。第５バスバ２１３ｅにより構成される負極端子２３０ｂは、１セルスタックアセンブリ３００の正極端子に接続される。第５バスバ２１３ｅにおいて負極端子２３０ｂを構成しない面は、バスバプレート２１０が本体２４０に取り付けられた後、レーザ溶接によりバッテリ２５０ｅの負極に接続される。保持爪２１５は、レーザ溶接前に第５バスバ２１３ｅを仮保持する機能も有する。また、第５バスバ２１３ｅは、電圧センサを接続するための端子２１６を有する。 Further, as shown in FIG. 8, the bus bar plate 210 includes a fifth bus bar 213e in the eighth electrode opening 212dn. As shown in FIG. 6, 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.
　なお、第１バスバ２１３ａから第５バスバ２１３ｅは、それぞれアルミニウム等の導電性金属により構成される。 The first bus bar 213a to the fifth bus bar 213e are each made of a conductive metal such as aluminum.
　バスバプレート２１０は、外周縁２１９全体に、正面側に突出したビード２１７を有する。また、バスバプレート２１０は、ガス抜き開口２１４の周縁全体に正面側に突出したビード２１７を有する。 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.
　さらに、バスバプレート２１０は、２つの電極用開口にまたがって配置されるバスバにおいて、当該２つの電極用開口の間のプレート部分２１８に、正面側に突出したビード２１７を有する。つまり、本実施形態において、バスバプレート２１０は、図９に示すように、第２電極用開口２１２ａｎと第３電極用開口２１２ｂｐとにまたがって配置される第２バスバ２１３ｂにおいて、第２電極用開口２１２ａｎと第３電極用開口２１２ｂｐとの間のプレート部分２１８に、ビード２１７を有する。また、バスバプレート２１０は、第４電極用開口２１２ｂｎと第５電極用開口２１２ｃｐとにまたがって配置される第３バスバ２１３ｃにおいて、第４電極用開口２１２ｂｎと第５電極用開口２１２ｃｐとの間のプレート部分２１８に、ビード２１７を有する。また、バスバプレート２１０は、第６電極用開口２１２ｃｎと第７電極用開口２１２ｄｐとにまたがって配置される第４バスバ２１３ｄにおいて、第６電極用開口２１２ｃｎと第７電極用開口２１２ｄｐとの間のプレート部分２１８に、ビード２１７を有する。 Furthermore, 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. In other words, in the present embodiment, 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. In addition, 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. In addition, 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.
　このように、バスバプレート２１０にビード２１７が設けられることにより、バスバプレート２１０及び４セルスタックアセンブリ全体の剛性が向上する。 Thus, by providing the bead 217 on the bus bar plate 210, the rigidity of the bus bar plate 210 and the entire 4-cell stack assembly is improved.
　４セルスタックアセンブリ２００は、バスバプレート２１０のガス抜き開口２１４に、開口弁カバー２６０を備える。開口弁カバー２６０は、例えばＰＢＴ等の樹脂により構成される。開口弁カバー２６０は、図１０に示すように、４セルスタックアセンブリ２００の組立状態における背面側に、ガス抜き開口２１４を覆う開口２６１ａ及び２６１ｂを有する。開口２６１ａと開口２６１ｂとは、仕切板２６５により仕切られている。仕切板２６５によって仕切られた各開口２６１ａ及び２６１ｂは、開口弁カバー２６０が４セルスタックアセンブリ２００として組み立てられた際に、各バッテリ２５０のガス逃がし孔２５２を覆う。 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. As shown in FIG. 10, 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.
　開口弁カバー２６０は、内部に空間２６３を有する略直方体形状である。開口弁カバー２６０は、内部の空間２６３と開口弁カバー２６０の外部とを連通する、略円柱形状のガス排出ダクト２６２を有する。ガス排出ダクト２６２には、図示しないホースが接続される。各バッテリ２５０内部から排出したガスは、開口２６１ａ及び２６１ｂから、開口弁カバー２６０の内部の空間２６３に流れ込んで合流し、ガス排出ダクト２６２を通って、ガス排出ダクト２６２に接続されたホースから外部に排出される。 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.
　開口弁カバー２６０は、複数の開口弁カバー取付穴２６４を備える。本実施形態において、開口弁カバー２６０は、ねじを、開口弁カバー取付穴２６４と、バスバプレート２１０のガス抜き開口２１４に対応するバスバプレート取付穴２１１とを貫通させて、ねじ穴構成部２４７又は２４９に設けられたねじ穴にねじ止めを行うことにより、本体２４０に取り付けられる。従って、開口弁カバー取付穴２６４は、ガス抜き開口２１４に対応するバスバプレート取付穴２１１に対応する位置に設けられ、締結点を構成する。また、開口弁カバー２６０の正面視における外周寸法は、ガス抜き開口２１４に設けられたビード２１７に密着して係合する寸法であることが好ましい。これにより、４セルスタックアセンブリ２００の組立状態において、ビード２１７と開口弁カバー２６０とが密着するため、バッテリ２５０から排出されたガスが、４セルスタックアセンブリ２００の外部に漏れることを防ぐことができる。 The opening valve cover 260 includes a plurality of opening valve cover mounting holes 264. In the present embodiment, 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. Accordingly, 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. Moreover, it is preferable that the outer periphery dimension in the front view of the opening valve cover 260 is a dimension which closely_contact | adheres to the bead 217 provided in the gas vent opening 214, and engages it. Thereby, in the assembled state of the 4-cell stack assembly 200, 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. .
　開口弁カバー２６０は、開口弁カバー２６０から外部へのガスの漏出を防ぐために、ＥＰＤＭ等のゴム製のシール２７０を開口２６１ａ及び２６１ｂに挟んで、本体２４０にねじ止めにより取り付けられる。 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.
［バスバと電極との接続］
　ここまで４セルスタックアセンブリ２００の構成について説明してきた。上述の通り、４セルスタックアセンブリ２００は、本体２４０にバスバプレート２１０を取り付けることにより構成される。そして、バスバプレート２１０の第１～第５バスバ２１３ａ～２１３ｅ（以下、バスバ２１３ともいう）は、本体２４０に保持されているバッテリ２５０の電極２５１に接続される。ここでバスバ２１３は、電極２５１を電気的に接続するものであるから、電気接続部材ともいう。 [Connection between bus bar and electrode]
The configuration of the 4-cell stack assembly 200 has been described so far. As described above, 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. Here, the bus bar 213 is also referred to as an electrical connection member because it electrically connects the electrodes 251.
　上述の通り、バスバ２１３と電極２５１との接続は、レーザ溶接により行われる。レーザ溶接によりバスバ２１３と電極２５１とを信頼性高く導通させるためには、レーザ溶接時のバスバ２１３と電極２５１との位置関係を高精度に保つ必要がある。つまり、バスバ２１３と電極２５１との間の距離が所定の範囲内でなければならない。また、４セルスタックアセンブリ２００の正面側から見た左右方向又は上下方向について、バスバ２１３と電極２５１とのずれ量が所定の量以下でなければならない。 As described above, the connection between the bus bar 213 and the electrode 251 is performed by laser welding. In order to connect the bus bar 213 and the electrode 251 with high reliability by laser welding, it is necessary to maintain the positional relationship between the bus bar 213 and the electrode 251 at the time of laser welding with high accuracy. That is, the distance between the bus bar 213 and the electrode 251 must be within a predetermined range. Further, the shift amount between the bus bar 213 and the electrode 251 in the left-right direction or the vertical direction as viewed from the front side of the four-cell stack assembly 200 must be a predetermined amount or less.
　このようにバスバ２１３と電極２５１との位置関係を高精度に保つために、バッテリ２５０を本体２４０で保持する際に、本体２４０における保持位置を高精度に保つ必要がある。 Thus, in order to keep the positional relationship between the bus bar 213 and the electrode 251 with high accuracy, when the battery 250 is held with the main body 240, it is necessary to keep the holding position in the main body 240 with high accuracy.
［クラッシュビード］
　一実施形態に係る４セルスタックアセンブリ２００の本体２４０はクラッシュビード５００を有する。クラッシュビード５００は、本体２４０においてバッテリ２５０が滑りにくいように保持し、かつ、本体２４０におけるバッテリ２５０の保持位置を高精度に保つための部材である。またクラッシュビード５００は、バッテリ２５０を付勢することができる弾性体である。図１１は、クラッシュビード５００を設けた本体２４０を表す図である。図１１では、下部ケース２４３と中部ケース２４２のみを表示している。本実施形態において、クラッシュビード５００は中部ケース２４２に設けられる。図１１では、クラッシュビード５００としてクラッシュビード５００ａ～５００ｆが中部ケース２４２に設けられている。中部ケース２４２は、下部ケース２４３の仕切板２４４を挟む両側にそれぞれ、仕切板２４４に接するように配置される。一般的に、部材の厚みに含まれる誤差は、部材の長さに含まれる誤差よりも小さい。したがって、仕切板２４４に接するように中部ケース２４２を配置して、仕切板２４４の厚みを利用して位置決めすることにより、中部ケース２４２の左右方向の位置精度を高精度に保つことができる。 [Crash Bead]
The body 240 of the four-cell stack assembly 200 according to one embodiment 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. In general, 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.
　バッテリ２５０は、中部ケース２４２のフランジ２４２ａの内側に収まるように配置される。前述の通り、本体２４０にはバッテリ２５０ａ、２５０ｂ、２５０ｃ及び２５０ｄが配置される。図１１では、バッテリ２５０ａ及び２５０ｂは表示されず、バッテリ２５０ｄは表示され、バッテリ２５０ｃは透過で表示されている。 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.
　クラッシュビード５００ａ～５００ｆは、中部ケース２４２のバッテリ２５０が配置される側の面において、バッテリ２５０の底面の外周に接するように設けられる。図１２は、クラッシュビード５００ａ～５００ｆの配置位置を説明する図である。バッテリ２５０は破線で表されている。この破線はバッテリ２５０が中部ケース２４２に接する面の外周を示している。そして、クラッシュビード５００ａ～５００ｆは、図１２において破線に沿って設けられる。つまりクラッシュビード５００は、バッテリ２５０の外周と接するように配置される。図１１によれば、クラッシュビード５００ａ～ｃは、下部ケース２４３の側面２４３ｃの側の辺に沿って設けられる。またクラッシュビード５００ｄ～ｆは、４セルスタックアセンブリ２００の正面側とは反対側の背面側の辺に沿って設けられる。 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. According to FIG. 11, 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.
　本実施形態において、クラッシュビード５００は、各辺３個ずつ設けられているが、数はこれに限られず、各辺に設けられる個数が異なってもよいし、２個以下又は４個以上設けられてもよい。 In the present embodiment, 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.
　また図１１において、クラッシュビード５００は、中部ケース２４２のバッテリ２５０ｂ又は２５０ｃが配置される側の面に設けられているが、バッテリ２５０ａ又は２５０ｄが配置される側の面にも同様に設けられる。このように中部ケース２４２の両面にクラッシュビード５００が設けられることにより、バッテリ２５０を一括して位置精度よく保持することができる。 In FIG. 11, 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. Thus, by providing the crush beads 500 on both surfaces of the middle case 242, the batteries 250 can be held together with high positional accuracy.
　図１３は、クラッシュビード５００の断面を表す図である。クラッシュビード５００は、中部ケース２４２から突出するように設けられる。本実施形態において、クラッシュビード５００は、断面が三角形の形状となっているがこれに限られず、他の形状でもよいし、曲面を有してもよい。好ましくは、クラッシュビード５００は中部ケース２４２と一体に成型される。また好ましくは、クラッシュビード５００は中部ケース２４２とは別体の部品であり、別途中部ケース２４２に取り付けられる。 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. In the present embodiment, 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. Preferably, the crash bead 500 is molded integrally with the middle case 242. Preferably, the crash bead 500 is a separate part from the middle case 242 and is attached to the middle case 242 separately.
　図１４Ａ及び図１４Ｂは、クラッシュビード５００とバッテリ２５０との位置関係を表す断面図である。図１４Ａはクラッシュビード５００とバッテリ２５０とが接している状態を表している。図１４Ａの黒丸で示した点がクラッシュビード５００とバッテリ２５０との接点Ｎである。バッテリ２５０の断面における各辺の角部は所定の曲率半径を有する曲面部であり、この場合、クラッシュビード５００とバッテリ２５０とはバッテリ２５０の曲面部の一部で接している。またこの場合、クラッシュビード５００は弾性変形しておらず、バッテリ２５０に対して弾性力を及ぼしていない。 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. In this case, the crash bead 500 and the battery 250 are in contact with part of the curved portion of the battery 250. In this case, the crash bead 500 is not elastically deformed and does not exert an elastic force on the battery 250.
　バッテリ２５０がクラッシュビード５００に接した後、さらに中部ケース２４２側に近づくように押しこまれるように中部ケース２４２の板面に垂直な力を加えられる場合、図１４Ｂに示すように、クラッシュビード５００は弾性変形する。図１４Ｂにおいて、破線は弾性変形する前のクラッシュビード５００を示し、実線は弾性変形したクラッシュビード５００を示している。この場合、クラッシュビード５００は弾性力Ｆをバッテリ２５０に及ぼす。すなわちクラッシュビード５００はバッテリ２５０を付勢する。この時、バッテリ２５０の曲面部に対して弾性力Ｆが及ぼされることにより、バッテリ２５０に発生する応力が緩和される。 When the battery 250 comes into contact with the crash bead 500 and a force perpendicular to the plate surface of the middle case 242 is applied so as to be pushed closer to the middle case 242 side, as shown in FIG. Is elastically deformed. In 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. In this case, 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.
　クラッシュビード５００は、バッテリ２５０と接する面が中部ケース２４２の板面に対して所定の角度を有している。そのため、弾性力Ｆは中部ケース２４２の板面に垂直の方向に働く垂直成分Ｆａと板面に平行な方向に働く平行成分Ｆｂとに分解される。つまり、バッテリ２５０は、弾性力Ｆの平行成分Ｆｂにより中部ケース２４２の板面に平行な方向に付勢される。弾性力Ｆの垂直成分Ｆａは、上述のバッテリ２５０を中部ケース２４２側に押し込む力に等しい。このようにクラッシュビード５００がバッテリ２５０と接する面に所定の角度を有することにより、クラッシュビード５００がバッテリ２５０に及ぼす弾性力Ｆが中部ケース２４２の板面に平行な方向にバッテリ２５０を付勢することができる。 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. As described above, 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.
　ここで中部ケース２４２に設けられるクラッシュビード５００のうち、クラッシュビード５００ａ～５００ｃは、弾性力Ｆの平行成分Ｆｂによってバッテリ２５０を下部ケース２４３の仕切板２４４へ向けて付勢する。そしてバッテリ２５０は、下部ケース２４３の仕切板２４４に接している中部ケース２４２のフランジ２４２ａに向けて常に押しつけられる。このようにバッテリ２５０が付勢されて、下部ケース２４３の仕切板２４４の厚みを利用して位置決めされている中部ケース２４２のフランジ２４２ａに押しつけられることにより、バッテリ２５０の左右方向の位置精度を保つことができる。 Here, among the crash beads 500 provided in the middle case 242, 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. Thus, 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.
　また中部ケース２４２に設けられるクラッシュビード５００のうち、クラッシュビード５００ｄ～５００ｆは、弾性力Ｆの平行成分Ｆｂによってバッテリ２５０を４セルスタックアセンブリ２００の正面側、つまりバスバプレート２１０へ向けて付勢する。このようにして、バッテリ２５０はバスバプレート２１０に向けて常に押しつけられる。このようにすることにより、バスバプレート２１０のバスバ２１３とバッテリ２５０の電極２５１との距離を所定の範囲内とすることができる。 Among the crash beads 500 provided in the middle case 242, 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.
　以上説明した通り、クラッシュビード５００が中部ケース２４２に設けられ、バッテリ２５０が付勢されることによって、バッテリ２５０とバスバプレート２１０との位置精度を保つことができる。そして、バスバプレート２１０のバスバ２１３とバッテリ２５０の電極２５１との位置精度を保った状態でレーザ溶接して、バスバ２１３と電極２５１とを信頼性高く導通させることができる。 As described above, 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.
＜クラッシュビードの材料＞
　上述の通り、一実施形態において、上部ケース２４１、中部ケース２４２及び下部ケース２４３を構成する材料は、それぞれＰＢＴ等の樹脂である。好ましくは、中部ケース２４２を構成する材料は上部ケース２４１及び下部ケース２４３とは異なる。また好ましくは、中部ケース２４２を構成する材料は上部ケース２４１及び下部ケース２４３よりも柔らかい（弾性係数が低い）材料である。例えば、中部ケース２４２を構成する材料をＰＢＴよりも柔らかい（弾性係数が低い）ポリプロピレン（ＰＰ：polypropylene）とすることができる。このようにすることで、上部ケース２４１および下部ケース２４３の剛性を保ちつつ、中部ケース２４２と一体に成型されたクラッシュビード５００をより変形させやすくすることができる。より変形しやすいクラッシュビード５００は、より確実にバッテリ２５０を保持できる。 <Crush bead material>
As described above, in one embodiment, the material constituting the upper case 241, the middle case 242, and the lower case 243 is a resin such as PBT. Preferably, the material constituting the middle case 242 is different from that of the upper case 241 and the lower case 243. Preferably, the material constituting the middle case 242 is a material softer (lower elastic coefficient) than the upper case 241 and the lower case 243. For example, the material constituting the middle case 242 can be made of polypropylene (PP: polypropylene) that is softer (lower elastic modulus) than PBT. By doing so, 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.
　上述のように、クラッシュビード５００は別体の部品として成型されて中部ケース２４２に取り付けられうる。好ましくは、別体の部品としてのクラッシュビード５００を構成する材料は、上部ケース２４１、中部ケース２４２及び下部ケース２４３を構成する材料よりも柔らかい（弾性係数が低い）材料である。このようにすることで、中部ケース２４２の剛性も保ちつつ、クラッシュビード５００のみをより変形させやすくすることができる。 As described above, the crash bead 500 can be molded as a separate part and attached to the middle case 242. Preferably, 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.
＜クラッシュビードの位置＞
　一実施形態において、クラッシュビード５００は中部ケース２４２に設けられた。しかしこれに限られず、クラッシュビード５００は上部ケース２４１や下部ケース２４３に設けられてもよい。上述の通り、バッテリ２５０は上部ケース２４１及び下部ケース２４３により挟持される。したがって、クラッシュビード５００が上部ケース２４１又は下部ケース２４３に設けられても、クラッシュビード５００はバッテリ２５０に接して、バッテリ２５０を付勢することができる。クラッシュビード５００が上部ケース２４１又は下部ケース２４３に設けられる場合においても、好ましくは、クラッシュビード５００はバッテリ２５０の外周に沿って配置される。また好ましくは、クラッシュビード５００は別体の部品として上部ケース２４１又は下部ケース２４３に取り付けられる。 <Crash bead location>
In one embodiment, the crash bead 500 is provided in the middle case 242. However, 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. As described above, 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. Even when the crash bead 500 is provided in the upper case 241 or the lower case 243, the crash bead 500 is preferably disposed along the outer periphery of the battery 250. Preferably, the crash bead 500 is attached to the upper case 241 or the lower case 243 as a separate part.
　本発明を諸図面および実施例に基づき説明してきたが、当業者であれば本開示に基づき種々の変形または修正をおこなうことが容易であることに注意されたい。従って、これらの変形または修正は本発明の範囲に含まれることに留意されたい。例えば、各構成部、各ステップなどに含まれる機能などは論理的に矛盾しないように再配置可能であり、複数の構成部およびステップなどを１つに組み合わせたり、或いは分割したりすることが可能である。 Although the present invention has been described based on the drawings and examples, it should be noted that those skilled in the art can easily make various changes or modifications based on the present disclosure. Therefore, it should be noted that these variations or modifications are included in the scope of the present invention. For example, the functions included in each component, each step, etc. can be rearranged so that there is no logical contradiction, and a plurality of components, steps, etc. can be combined into one or divided. It is.
　１００　電源装置
　１１０　筐体
　１２０　バスバ固定ターミナル
　２００　４セルスタックアセンブリ（組電池）
　２１０　バスバプレート
　２１３ａ～２１３ｅ　第１～第５バスバ
　２２０　拘束板
　２３０ａ　正極端子
　２３０ｂ　負極端子
　２４０　本体
　２４１　上部ケース
　２４２　中部ケース
　２４３　下部ケース
　２４３ａ　空間
　２４３ｃ　下部ケース側面
　２４４　仕切板
　２４５　フランジ
　２５０、２５０ａ～２５０ｄ　バッテリ（電池セル）
　２５１　電極
　３００　１セルスタックアセンブリ
　３１０　バスバプレート
　３２０　拘束板
　３３０ａ　正極端子
　３３０ｂ　負極端子
　５００　クラッシュビード DESCRIPTION OF SYMBOLS 100 Power supply device 110 Housing | casing 120 Bus bar fixed terminal 200 4 cell stack assembly (assembled battery)
210 Bus bar plates 213a to 213e First to fifth bus bars 220 Restraint plate 230a Positive terminal 230b Negative terminal 240 Main body 241 Upper case 242 Middle case 243 Lower case 243a Space 243c Lower case side surface 244 Partition plate 245 Flange 250, 250a to 250d Battery ( Battery cell)
251 Electrode 300 1 cell stack assembly 310 Bus bar plate 320 Restraint plate 330a Positive electrode terminal 330b Negative electrode terminal 500 Crash bead

Claims (12)

  1. 　電池セルと、本体と、バスバを有するバスバプレートとを備え、
    　複数の前記電池セルが前記本体内に保持され、前記電池セルの電極が前記バスバを介して他の電池セルの電極に接続された組電池において、
    　前記本体は、弾性体と、前記電池セルを仕切って保持する仕切板とを含み、
    　前記弾性体は、前記電池セルを前記仕切板へ向けて付勢する
    ことを特徴とする組電池。     A battery cell, a main body, and a bus bar plate having a bus bar,
    In the assembled battery in which a plurality of the battery cells are held in the main body, and the electrode of the battery cell is connected to the electrode of another battery cell via the bus bar,
    The main body includes an elastic body and a partition plate that partitions and holds the battery cell,
    The battery pack is characterized in that the elastic body urges the battery cell toward the partition plate.
  2. 　請求項１に記載の組電池において、
    　前記本体は、下部ケースと中部ケースと上部ケースとを含み、
    　前記弾性体は、前記中部ケースに設けられ、
    　前記仕切板は、前記下部ケースに設けられ、
    　前記電池セルは、前記下部ケースと前記中部ケースとの間、又は、前記中部ケースと前記上部ケースとの間に挟持される
    ことを特徴とする組電池。     The assembled battery according to claim 1,
    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.
  3. 　請求項２に記載の組電池において、
    　前記弾性体は、前記下部ケース及び上部ケースよりも柔らかい材料で構成される
    ことを特徴とする組電池。     The assembled battery according to claim 2,
    The battery pack is characterized in that the elastic body is made of a softer material than the lower case and the upper case.
  4. 　請求項１に記載の組電池において、
    　前記弾性体は、前記電池セルの曲面部において前記電池セルに接する
    ことを特徴とする組電池。     The assembled battery according to claim 1,
    The battery pack is characterized in that the elastic body is in contact with the battery cell at a curved surface portion of the battery cell.
  5. 　請求項２に記載の組電池において、
    　前記弾性体は、前記電池セルの曲面部において前記電池セルに接する
    ことを特徴とする組電池。     The assembled battery according to claim 2,
    The battery pack is characterized in that the elastic body is in contact with the battery cell at a curved surface portion of the battery cell.
  6. 　請求項３に記載の組電池において、
    　前記弾性体は、前記電池セルの曲面部において前記電池セルに接する
    ことを特徴とする組電池。     The assembled battery according to claim 3,
    The battery pack is characterized in that the elastic body is in contact with the battery cell at a curved surface portion of the battery cell.
  7. 　請求項１に記載の組電池において、
    　前記弾性体は、前記電池セルを前記バスバプレートへ向けて付勢する
    ことを特徴とする組電池。     The assembled battery according to claim 1,
    The battery pack is characterized in that the elastic body urges the battery cell toward the bus bar plate.
  8. 　請求項２に記載の組電池において、
    　前記弾性体は、前記電池セルを前記バスバプレートへ向けて付勢する
    ことを特徴とする組電池。     The assembled battery according to claim 2,
    The battery pack is characterized in that the elastic body urges the battery cell toward the bus bar plate.
  9. 　請求項３に記載の組電池において、
    　前記弾性体は、前記電池セルを前記バスバプレートへ向けて付勢する
    ことを特徴とする組電池。     The assembled battery according to claim 3,
    The battery pack is characterized in that the elastic body urges the battery cell toward the bus bar plate.
  10. 　請求項４に記載の組電池において、
    　前記弾性体は、前記電池セルを前記バスバプレートへ向けて付勢する
    ことを特徴とする組電池。     The assembled battery according to claim 4,
    The battery pack is characterized in that the elastic body urges the battery cell toward the bus bar plate.
  11. 　請求項５に記載の組電池において、
    　前記弾性体は、前記電池セルを前記バスバプレートへ向けて付勢する
    ことを特徴とする組電池。     The assembled battery according to claim 5,
    The battery pack is characterized in that the elastic body urges the battery cell toward the bus bar plate.
  12. 　請求項６に記載の組電池において、
    　前記弾性体は、前記電池セルを前記バスバプレートへ向けて付勢する
    ことを特徴とする組電池。     The assembled battery according to claim 6,
    The battery pack is characterized in that the elastic body urges the battery cell toward the bus bar plate.
PCT/JP2016/002996 2015-06-22 2016-06-21 Battery pack WO2016208188A1 (en)

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JP2015-125029 2015-06-22
JP2015125029A JP2017010780A (en) 2015-06-22 2015-06-22 Battery pack

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EP4336528A1 (en) * 2021-06-04 2024-03-13 GS Yuasa International Ltd. Power storage apparatus

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013016351A (en) * 2011-07-04 2013-01-24 Hitachi Vehicle Energy Ltd Battery module and electric power supply device
JP2013054869A (en) * 2011-09-01 2013-03-21 Toshiba Corp Assembled battery and manufacturing method of the same
JP2013242967A (en) * 2012-05-17 2013-12-05 Denso Corp Battery pack

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CN105190934B (en) * 2012-12-28 2017-10-13 日立汽车系统株式会社 Battery pack

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013016351A (en) * 2011-07-04 2013-01-24 Hitachi Vehicle Energy Ltd Battery module and electric power supply device
JP2013054869A (en) * 2011-09-01 2013-03-21 Toshiba Corp Assembled battery and manufacturing method of the same
JP2013242967A (en) * 2012-05-17 2013-12-05 Denso Corp Battery pack

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