WO2022255162A1 - Dispositif de stockage d'énergie - Google Patents

Dispositif de stockage d'énergie Download PDF

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Publication number
WO2022255162A1
WO2022255162A1 PCT/JP2022/021216 JP2022021216W WO2022255162A1 WO 2022255162 A1 WO2022255162 A1 WO 2022255162A1 JP 2022021216 W JP2022021216 W JP 2022021216W WO 2022255162 A1 WO2022255162 A1 WO 2022255162A1
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WO
WIPO (PCT)
Prior art keywords
power storage
busbar
cover
storage element
axis direction
Prior art date
Application number
PCT/JP2022/021216
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English (en)
Japanese (ja)
Inventor
泰行 岩嶋
晃希 前田
駿 佐々木
Original Assignee
株式会社Ｇｓユアサ
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 株式会社Ｇｓユアサ filed Critical 株式会社Ｇｓユアサ
Publication of WO2022255162A1 publication Critical patent/WO2022255162A1/fr

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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
    • H01M50/30—Arrangements for facilitating escape of gases
    • H01M50/342—Non-re-sealable arrangements
    • 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
    • H01M50/30—Arrangements for facilitating escape of gases
    • H01M50/35—Gas exhaust passages comprising elongated, tortuous or labyrinth-shaped exhaust passages
    • H01M50/367—Internal gas exhaust passages forming part of the battery cover or case; Double cover vent systems
    • 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
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/503—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the shape of the interconnectors
    • 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
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/507—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing comprising an arrangement of two or more busbars within a container structure, e.g. busbar modules
    • 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
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
    • H01M50/588—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries outside the batteries, e.g. incorrect connections of terminals or busbars
    • 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
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
    • H01M50/59—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries characterised by the protection means
    • H01M50/591—Covers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present invention relates to a power storage device including power storage elements and bus bars.
  • Patent Literature 1 discloses a battery module (power storage device) in which a plurality of cells (power storage elements) and busbars are housed in a housing (armor).
  • the present invention has been made by the inventor of the present application with a new focus on the above problem, and an object of the present invention is to provide a space-saving power storage device.
  • a power storage device is arranged between a power storage element, a bus bar, an exterior body having a wall at a position where the power storage element sandwiches the bus bar, and the bus bar and the wall.
  • the power storage device includes an insulating busbar cover between the busbar and the wall portion of the exterior body, and the busbar cover is positioned closer to the power storage element than part of the busbar. has a part.
  • the first cover portion of the busbar cover is arranged at a position closer to the storage element than part of the busbar.
  • FIG. 1 is a perspective view showing the appearance of a power storage device according to an embodiment.
  • FIG. 2 is an exploded perspective view showing components included in the power storage device according to the embodiment.
  • FIG. 3 is an exploded perspective view showing components included in the power storage device according to the embodiment.
  • FIG. 4 is an exploded perspective view showing each component by disassembling the electric storage element according to the embodiment.
  • FIG. 5 is a perspective view showing the configuration of the busbar according to the embodiment.
  • FIG. 6 is a perspective view showing the configuration of the busbar cover according to the embodiment.
  • FIG. 7 is a perspective view showing the configuration of the busbar cover and its surroundings according to the embodiment.
  • FIG. 8 is a cross-sectional view showing the configuration of the busbar cover and its surroundings according to the embodiment.
  • a power storage device is arranged between a power storage element, a bus bar, an exterior body having a wall at a position where the power storage element sandwiches the bus bar, and the bus bar and the wall.
  • the power storage device includes an insulating busbar cover between the busbar and the wall portion of the exterior body, and the busbar cover is positioned closer to the power storage element than part of the busbar. has a part.
  • the first cover portion of the busbar cover is arranged at a position closer to the storage element than part of the busbar.
  • the wall may be made of metal.
  • the wall is made of metal, it is necessary to further improve the insulation between the wall and the busbar. For this reason, in the power storage device, an insulating busbar cover is arranged between the busbar and the metal wall portion of the exterior body. As a result, space can be saved while improving insulation between the wall portion of the exterior body and the bus bar.
  • the power storage element may have a gas discharge valve at a position facing the first cover portion, and the first cover portion may have a first through hole at a position facing the gas discharge valve.
  • the first cover portion of the busbar cover is arranged at a position close to the storage element, if the storage element has a gas discharge valve at a position facing the first cover portion, gas is released from the gas discharge valve.
  • the gas collides with the first cover part when If the gas collides with the first cover, there is a risk that the exhaust of the gas will be hindered or the first cover will be damaged.
  • a first through hole is formed at a position facing the gas discharge valve of the first cover portion.
  • an insulating busbar plate may be provided between the power storage element and the busbar, and the busbar plate may have a protrusion that guides gas from the gas discharge valve to the first through hole. good.
  • the insulating busbar plate between the power storage element and the busbar is provided with a protrusion that guides the gas from the gas discharge valve of the power storage element to the first through hole of the busbar cover.
  • the gas from the gas exhaust valve can be easily guided to the first through hole of the busbar cover. Therefore, even if the gas is discharged from the gas discharge valve, the collision of the gas with the first cover portion can be further suppressed, so that the obstruction of the gas exhaustion and the damage of the first cover portion can be further suppressed.
  • the busbar has a first projecting portion that projects toward the wall portion, and the busbar cover is further recessed toward the wall portion, and a second cover that accommodates the first projecting portion in the recessed portion. may have a part.
  • the busbar since the busbar has the first projecting portion projecting toward the wall portion of the exterior body, the busbar cover is recessed toward the wall portion, and the first projecting portion is accommodated in the recessed portion. A second cover part is provided. Thereby, even if the bus bar has the first projecting portion, insulation between the first projecting portion and the wall portion can be ensured.
  • the busbar may have a second projection projecting toward the wall, and the busbar cover may further have a second through hole through which the second projection penetrates.
  • the busbar is provided with a second projecting portion that projects toward the wall of the exterior body in order to connect the busbar to other conductive members.
  • the busbar cover is formed with a second through hole through which the second projecting portion penetrates.
  • the present invention can be realized not only as a power storage device, but also as a busbar cover or a combination of a busbar and a busbar cover.
  • the longitudinal direction of the power storage device the direction in which the power storage unit and the control unit are arranged, the direction in which the short sides of the container of the power storage element face each other, or the direction in which the pair of electrode terminals of the power storage element are arranged is Define the X-axis direction.
  • the lateral direction of the power storage device, the alignment direction of the power storage element, the busbar plate, the busbar, and the busbar cover, the alignment direction of the body and lid of the container of the power storage element, or the projecting direction of the electrode terminal of the power storage element is the Y-axis direction.
  • the direction in which the main body and the lid of the power storage device are arranged, the direction in which the power storage element and the spacer are arranged, the direction in which the long sides of the container of the power storage element face each other, the stacking direction of the electrode plates of the electrode body of the power storage element, or the vertical direction is defined as the Z-axis direction.
  • These X-axis direction, Y-axis direction, and Z-axis direction are directions that cross each other (perpendicularly in this embodiment).
  • the Z-axis direction may not be the vertical direction, but for convenience of explanation, the Z-axis direction will be described below as the vertical direction.
  • the positive direction of the X-axis indicates the direction of the arrow on the X-axis
  • the negative direction of the X-axis indicates the direction opposite to the positive direction of the X-axis.
  • Expressions indicating relative directions or orientations, such as parallel and orthogonal, also include cases where the directions or orientations are not strictly speaking.
  • “Two directions are parallel” means not only that the two directions are completely parallel, but also that they are substantially parallel, that is, including a difference of, for example, several percent. do.
  • the expression “insulation” means "electrical insulation”.
  • FIG. 1 is a perspective view showing the appearance of a power storage device 1 according to this embodiment.
  • FIGS. 2 and 3 are exploded perspective views showing components of the power storage device 1 according to the present embodiment.
  • FIG. 3 shows a further disassembled configuration of the exterior body 100, the storage element 200 and the spacer 300 shown in FIG.
  • the power storage device 1 is a device that can charge electricity from the outside and discharge electricity to the outside, and has a substantially rectangular parallelepiped shape in the present embodiment.
  • the power storage device 1 is a battery module (assembled battery) used for power storage, power supply, or the like.
  • the power storage device 1 is used for driving mobile bodies such as automobiles, motorcycles, water crafts, ships, snowmobiles, agricultural machinery, construction machinery, or railway vehicles for electric railways, or for starting engines. Used as a battery or the like.
  • the vehicles include electric vehicles (EV), hybrid electric vehicles (HEV), plug-in hybrid electric vehicles (PHEV), and fossil fuel (gasoline, light oil, liquefied natural gas, etc.) vehicles.
  • Examples of railway vehicles for the electric railway include electric trains, monorails, linear motor cars, and hybrid trains having both diesel engines and electric motors.
  • the power storage device 1 can also be used as a stationary battery or the like for home or business use.
  • the power storage device 1 includes a power storage unit 10 and a control unit 20 , and the power storage unit 10 has an exterior body 100 and a terminal unit 30 .
  • a portion of the power storage device 1 having the power storage element 200 is referred to as a power storage unit 10
  • a portion having a control device for controlling the power storage element 200 is referred to as a control unit 20 .
  • inside the exterior body 100 there are a storage element 200, a spacer 300 (a first spacer 310 and a second spacer 320), a bus bar plate 400, a bus bar 500 (510 to 530), a bus bar
  • the cover 600, the control unit 20, and the like are accommodated.
  • the power storage device 1 may include an exhaust section for discharging gas discharged from the power storage element 200 to the outside of the exterior body 100 .
  • the terminal unit 30 is a member having an external terminal 31a that is a positive or negative module terminal (general terminal) of the power storage device 1. Attached to the negative end.
  • the terminal unit 30 has a busbar 31 .
  • the bus bar 31 is a plate-shaped conductive member, and is formed of a conductive member made of metal such as aluminum, aluminum alloy, copper, copper alloy, nickel, or a combination thereof, or a conductive member other than metal.
  • the bus bar 31 is connected to the bus bar 520 at its positive Y-axis end and has a negative Y-axis end functioning as an external terminal 31a.
  • the external terminal 31a is a negative external terminal.
  • power storage element 200 of power storage unit 10 and external terminal 31 a are electrically connected via bus bar 520 .
  • Bus bar 31 and bus bar 520 are connected (joined) by bolting, but may be connected (joined) by welding or the like.
  • the control unit 20 is a device that has a control device (not shown) that controls the power storage elements 200 that the power storage unit 10 has. Specifically, it is a BMS (Battery Management System) that controls the power storage elements 200.
  • the control device includes a circuit board, a fuse, a relay, a semiconductor switch such as a FET (Field Effect Transistor), a shunt resistor, and the like, which control charging and discharging of the storage element 200 .
  • An external terminal 21 that is a positive or negative module terminal (general terminal) of the power storage device 1 is arranged at the end of the exterior body 100 in the positive direction of the X axis and the negative direction of the Y axis.
  • the external terminal 21 is a terminal with a polarity different from that of the external terminal 31 a of the terminal unit 30 (positive external terminal).
  • External terminal 21 is electrically connected to storage element 200 .
  • the power storage device 1 charges electricity from the outside and discharges electricity to the outside through these external terminals 21 and 31a.
  • the external terminals 21 are made of any conductive material or the like that can be used for the busbars 31 .
  • the exterior body 100 is a box-shaped (substantially rectangular parallelepiped) container (module case) that constitutes the housing (outer shell) of the power storage device 1 (power storage unit 10).
  • the exterior body 100 is arranged outside the power storage elements 200 and the like, fixes the power storage elements 200 and the like at predetermined positions, and protects them from impacts and the like.
  • the exterior body 100 includes a first exterior body 110 and a second exterior body 120 arranged side by side in the Z-axis direction, joining members 130 and 140 for joining the first exterior body 110 and the second exterior body 120, and a collar. 150 and .
  • the first exterior body 110 is arranged in the Z-axis minus direction of the second exterior body 120 and is a flat rectangular member that constitutes the bottom wall of the exterior body 100, on which the power storage element 200 and the like are placed.
  • the second exterior body 120 is a bottomed rectangular tubular member that constitutes the main body of the exterior body 100 (a portion other than the bottom wall), and is connected (joined) to the first exterior body 110 to cover the power storage element 200 and the like.
  • the second exterior body 120 has a top wall 120a, a pair of long side walls 120b, and a pair of short side walls 120c.
  • the second exterior body 120 has an opening facing in the negative direction of the Z axis, and the first exterior body 110 functions as a lid that closes the opening of the second exterior body 120 .
  • the first exterior body 110 and the second exterior body 120 are made of metal members such as stainless steel, aluminum, aluminum alloy, iron, steel plate, etc., or insulation treatment such as insulation coating, from the viewpoint of ensuring safety (breakage resistance). It is formed of a highly rigid member such as the metal member to which the The first exterior body 110 and the second exterior body 120 can be formed by aluminum die casting or the like.
  • the first exterior body 110 and the second exterior body 120 may be formed of members of the same material, or may be formed of members of different materials.
  • connection portions 111 and 112 of the first exterior body 110 and the connection portion 121 and the like of the second exterior body 120 are joined using the joining members 130 and 140 and the collar 150 to form the first
  • the exterior body 110 and the second exterior body 120 are connected (fixed).
  • the long side wall 120b which is the wall portion (side wall) of the second exterior body 120 in the Y-axis negative direction, is positioned to sandwich the busbar plate 400, the busbars 500 (510 to 530), and the busbar cover 600 with the power storage element 200. placed.
  • a through hole 125 is formed in the long side wall 120b.
  • the through-hole 125 is a through-hole having a rectangular shape when viewed from the Y-axis direction, which is arranged at the end of the long side wall 120b in the negative direction of the X-axis and penetrates the long side wall 120b in the Y-axis direction.
  • the through hole 125 is a through hole through which the bus bar 31 passes when connecting (joining) the bus bar 31 of the terminal unit 30 to the bus bar 520 .
  • the first exterior body 110 and the second exterior body 120 are joined together to sandwich the power storage element 200 therebetween.
  • the first exterior body 110 and the second exterior body 120 sandwich and constrain the power storage element 200 in the Z-axis direction, and apply a restraining force to the power storage element 200 in the Z-axis direction.
  • the first exterior body 110 and the second exterior body 120 include a plurality of power storage elements 200 arranged in the X-axis direction and the Z-axis direction, and a plurality of spacers 300 (a first spacer 310 and a second spacer 300) arranged in the Z-axis direction.
  • first exterior body 110 and the second exterior body 120 collectively sandwich and constrain the plurality of power storage elements 200 and the plurality of spacers 300 .
  • first exterior body 110 and the second exterior body 120 are a pair of end plates.
  • the power storage element 200 is a secondary battery (single battery) capable of charging and discharging electricity, and more specifically, a non-aqueous electrolyte secondary battery such as a lithium ion secondary battery.
  • the power storage element 200 has a flattened rectangular parallelepiped shape (rectangular shape), a plurality of power storage elements 200 are arranged in the X-axis direction, and a plurality of power storage elements 200 are stacked in the Z-axis direction.
  • the eight power storage elements 200 are placed horizontally (sideways) (with the long side surfaces 211a of the power storage elements 200, which will be described later, facing the Z-axis direction).
  • four power storage elements 201 to 204 are arranged side by side in the X-axis direction from the X-axis minus direction to the X-axis plus direction, and four power storage elements 205 to 208 are arranged from the X-axis minus direction to the X-axis plus direction. are arranged side by side in the X-axis direction.
  • Four power storage elements 201 to 204 and four power storage elements 205 to 208 are stacked (stacked flat) in the Z-axis direction.
  • the number of power storage elements 200 is not particularly limited, and any number of power storage elements 200 may be arranged (arranged) in the X-axis direction, and how many power storage elements 200 may be arranged (stacked) in the Z-axis direction.
  • the shape of the electric storage element 200 is not limited to the rectangular shape described above, and may be other shapes such as a polygonal columnar shape, a cylindrical shape, an elliptical columnar shape, and an oval columnar shape.
  • the storage element 200 is not limited to a non-aqueous electrolyte secondary battery, and may be a secondary battery other than a non-aqueous electrolyte secondary battery, or may be a capacitor.
  • the power storage element 200 may be a primary battery that can use stored electricity without being charged by the user, instead of a secondary battery.
  • the storage element 200 may be a battery using a solid electrolyte.
  • the storage element 200 may be a pouch-type storage element. A detailed description of the configuration of the storage element 200 will be given later.
  • the spacer 300 is a rectangular plate-shaped spacer that is aligned with the power storage element 200 in the Z-axis direction and is arranged adjacent to the power storage element 200 .
  • Spacer 300 is arranged in the positive Z-axis direction or the negative Z-axis direction of storage element 200 , facing long side surface 211 a of storage element 200 .
  • the spacer 300 is made of polycarbonate (PC), polypropylene (PP), polyethylene (PE), polystyrene (PS), polyphenylene sulfide resin (PPS), polyphenylene ether (PPE (including modified PPE)), polyethylene terephthalate (PET), Polybutylene terephthalate (PBT), polyetheretherketone (PEEK), tetrafluoroethylene/perfluoroalkyl vinyl ether (PFA), polytetrafluoroethylene (PTFE), polyethersulfone (PES), polyamide (PA), ABS resin
  • PC polycarbonate
  • PP polypropylene
  • PE polyethylene
  • PS polystyrene
  • PPS polyphenylene sulfide resin
  • PPE polyphenylene ether
  • PET polyethylene terephthalate
  • PBT Polybutylene terephthalate
  • PEEK polyetheretherketone
  • PTFE polytetrafluoroethylene
  • PTFE poly
  • a first spacer 310 and a pair of second spacers 320 are arranged as spacers 300 .
  • the first spacer 310 is arranged across the plurality of power storage elements 200 at a position adjacent to the plurality of power storage elements 200 arranged in the X-axis direction in the Z-axis direction.
  • the first spacer 310 is positioned adjacent to the four power storage elements 200 (201 to 204 or 205 to 208) aligned in the X-axis direction in the Z-axis direction, and extends across the four power storage elements 200 in the X-axis direction. It is arranged to extend in the axial direction.
  • the first spacer 310 is an intermediate spacer arranged between the energy storage elements 200 adjacent in the Z-axis direction (between the four energy storage elements 201 to 204 and the four energy storage elements 205 to 208). is.
  • the second spacer 320 is arranged across the plurality of power storage elements 200 arranged in the X-axis direction at a position sandwiching the plurality of power storage elements 200 with the first spacer 310 in the Z-axis direction. Specifically, the second spacer 320 and the first spacer 310 sandwich the four energy storage elements 200 (201 to 204 or 205 to 208) aligned in the X-axis direction in the Z-axis direction. 200 extending in the X-axis direction.
  • second spacer 320 is an end spacer arranged between power storage element 200 and first exterior body 110 or second exterior body 120 . Specifically, a pair of second spacers 320 are arranged between the four storage elements 205 to 208 and the first exterior body 110 and between the four storage elements 201 to 204 and the second exterior body 120. be done.
  • first spacer 310 and the pair of second spacers 320 are arranged so as to sandwich the power storage element 200 in the Z-axis direction, and are spaced between the power storage elements 200 and between the power storage element 200 and the first exterior body 110 . and the second exterior body 120 are insulated.
  • the busbar plate 400 is a flat rectangular insulating member that is placed between the power storage element 200 and the busbar 500 and that can insulate the busbar 500 from other members and regulate the position of the busbar 500 .
  • the busbar plate 400 is made of any insulating resin material or the like that can be used for the spacers 300 .
  • the busbar plate 400 is arranged in the Y-axis negative direction of the plurality of power storage elements 200 and positioned with respect to the plurality of power storage elements 200 . As a result, the bus bar 500 is positioned with respect to the plurality of power storage elements 200 and joined to electrode terminals 220 (described later) of the plurality of power storage elements 200 .
  • the bus bar 500 is a plate-shaped member that is arranged in the Y-axis negative direction of the plurality of storage elements 200 and is connected (bonded) to the plurality of storage elements 200 and the terminal unit 30 .
  • three busbars 510 , 520 and 530 are arranged as busbars 500 .
  • Bus bar 510 is arranged between bus bar 520 and bus bar 530 and connects electrode terminals 220 of adjacent power storage elements 200 to each other.
  • the bus bar 520 is arranged most in the negative direction of the X axis among the plurality of bus bars 500, and connects the electrode terminal 220 of the power storage element 200, which is the most in the negative direction of the X axis, to the bus bar 31 of the terminal unit 30 to connect the power storage element. 200 and the external terminal 31a are electrically connected.
  • Bus bar 530 is arranged most in the positive X-axis direction among a plurality of bus bars 500 and electrically connects electrode terminal 220 of storage element 200 in the most positive X-axis direction with external terminal 21 .
  • bus bar 500 and electrode terminal 220 of power storage element 200 are connected (joined) by welding, but may be connected (joined) by bolting or the like.
  • Bus bar 500 is formed of any conductive material or the like that can be used for bus bar 31 .
  • bus bar 500 connects two storage elements 200 in parallel to form four sets of storage element groups, and connects the four sets of storage element groups in series. The form is not particularly limited. A detailed description of the configuration of bus bar 500 will be given later.
  • the busbar cover 600 is an insulating cover member that is arranged to cover the busbar 500 and insulates the busbar 500 from other members.
  • busbar cover 600 is a plate-like member arranged to extend over a plurality of busbars 500 (510 to 530) in the X-axis direction so as to cover the plurality of busbars 500 (510 to 530).
  • the busbar cover 600 is arranged between the busbar 500 and the wall portion of the second exterior body 120 (the long side wall 120b in the negative Y-axis direction). Thereby, the busbar cover 600 insulates the plurality of busbars 500 from other members such as the long side walls 120b.
  • the busbar cover 600 is made of any insulating resin material or the like that can be used for the spacers 300 .
  • Busbar cover 600 is arranged at a position sandwiching busbar 500 with busbar plate 400 , and has a portion that engages with busbar plate 400 , so that busbar cover 600 is attached and fixed to busbar plate 400 .
  • a detailed description of the configuration of busbar cover 600 will be given later.
  • FIG. 4 is an exploded perspective view showing each component by disassembling the power storage device 200 according to the present embodiment. Specifically, FIG. 4 shows an exploded view of each part in a state in which the electric storage device 200 shown in FIG. 3 is placed vertically (upright).
  • the electric storage element 200 includes a container 210, a pair of (positive electrode and negative electrode) electrode terminals 220, and a pair of (positive electrode and negative electrode) gaskets 230.
  • a pair of (positive electrode and negative electrode) gaskets 240 , a pair (positive electrode and negative electrode) current collectors 250 , and an electrode body 260 are housed inside the container 210 .
  • An electrolytic solution non-aqueous electrolyte
  • the type thereof is not particularly limited as long as it does not impair the performance of the electric storage element 200, and various kinds can be selected.
  • a spacer disposed on the side or below the electrode body 260, an insulating film that wraps the electrode body 260 and the like, an insulating sheet that covers the outer surface of the container 210, and the like may be disposed.
  • the container 210 is a rectangular parallelepiped (square or box-shaped) case having a container body 211 with an opening and a container lid 212 that closes the opening of the container body 211 .
  • the container 210 has a structure that can seal the inside by joining the container body 211 and the container lid 212 by welding or the like after the electrode body 260 and the like are accommodated inside the container body 211 .
  • the material of the container body 211 and the container lid 212 is not particularly limited, but weldable metals such as stainless steel, aluminum, aluminum alloys, iron, and plated steel plates are preferable.
  • the container main body 211 is a rectangular tubular member that constitutes the main body of the container 210 and has a bottom, and an opening is formed on the Y-axis negative direction side.
  • the container body 211 has a pair of rectangular and planar (flat) long side surfaces 211a on both side surfaces in the Z-axis direction, and a pair of rectangular and planar (flat) side surfaces on both side surfaces in the X-axis direction. It has a short side surface 211b and a rectangular planar (flat) bottom surface 211c on the Y-axis plus direction side.
  • the container lid 212 is a rectangular plate-like member that constitutes the lid of the container 210 , and is arranged to extend in the negative Y-axis direction of the container body 211 in the X-axis direction.
  • the container cover 212 has a gas discharge valve 212a that releases the pressure inside the container 210 when the pressure rises, and an injection part (not shown) for injecting the electrolytic solution into the container 210. ) etc. are provided.
  • the electrode body 260 is a power storage element (power generation element) formed by laminating a positive electrode plate, a negative electrode plate, and a separator.
  • the positive electrode plate is formed by forming a positive electrode active material layer on a positive electrode substrate layer, which is a collector foil made of a metal such as aluminum or an aluminum alloy.
  • the negative electrode plate is formed by forming a negative electrode active material layer on a negative electrode substrate layer, which is a collector foil made of a metal such as copper or a copper alloy.
  • the active material used for the positive electrode active material layer and the negative electrode active material layer any known material can be appropriately used as long as it can intercalate and deintercalate lithium ions.
  • electrode body 260 is formed by winding electrode plates (positive electrode plate and negative electrode plate) around a winding axis (virtual axis parallel to the X-axis direction) extending in the X-axis direction. It is a type (so-called vertically wound type) electrode assembly.
  • the Z-axis direction is also called the stacking direction.
  • the electrode body 260 is formed by stacking electrode plates in the stacking direction.
  • the electrode body 260 has a pair of flat portions 261 aligned in the Z-axis direction and a pair of curved portions 262 aligned in the Y-axis direction by winding the electrode plate. is the stacking direction of the electrode plates in the flat portion 261 .
  • the flat portion 261 is a flat portion that connects the ends of the pair of curved portions 262, and the curved portion 262 is a portion curved in a semicircular shape or the like so as to protrude in the Y-axis direction.
  • the direction in which the flat surface of the flat portion 261 faces or the facing direction of the pair of flat portions 261 can also be defined as the stacking direction. Therefore, it can be said that the power storage elements 201 and 205 are arranged in the stacking direction. The same applies to other storage elements 200 .
  • the X-axis direction in which the power storage elements 201 to 204 are arranged is also called an arrangement direction.
  • the power storage elements 201 to 204 are arranged in an arrangement direction crossing the stacking direction. The same applies to the storage elements 205-208.
  • the active material is formed (coated) at the ends of the positive electrode plate and the negative electrode plate in the shifted direction. 3) It has a part (active material layer non-formed part) where the base material layer is exposed without being exposed.
  • the electrode assembly 260 protrudes from the flat portion 261 and the curved portion 262 to both sides in the X-axis direction at both ends in the X-axis direction, and the current collector 250 is formed by laminating the active material layer-free portions of the positive electrode plate and the negative electrode plate. It has an end 263 connected to the .
  • the electrode body 260 may be a so-called horizontal-wound electrode body formed by winding electrode plates around a winding axis extending in the Y-axis direction, or a laminated type electrode body formed by stacking a plurality of flat plate-shaped electrode plates ( Any type of electrode body may be used, such as a stack type electrode body or a bellows-shaped electrode body in which electrode plates are folded into a bellows shape.
  • the flat portion is the flat portion other than the curved portion and the connection portion (tab) with the current collector.
  • a flat portion is a flat portion other than the connection portion (tab) with the current collector.
  • the electrode terminal 220 is a terminal member (a positive terminal and a negative terminal) of the storage element 200, and is arranged on the container lid 212 so as to protrude in the Y-axis negative direction.
  • the electrode terminal 220 is electrically connected to the positive plate and the negative plate of the electrode assembly 260 via the current collector 250 .
  • the electrode terminal 220 is made of a conductive member such as metal such as aluminum, aluminum alloy, copper, or copper alloy.
  • the current collector 250 is a conductive member (a positive electrode current collector and a negative electrode current collector) electrically connected to the electrode terminal 220 and the end portion 263 of the electrode body 260 .
  • the current collector 250 is made of aluminum, an aluminum alloy, copper, a copper alloy, or the like.
  • the gaskets 230 and 240 are flat insulating sealing members arranged between the container lid 212 and the electrode terminal 220 and current collector 250 . Gaskets 230 and 240 are made of any insulating resin material or the like that can be used for spacer 300 .
  • FIG. 5 is a perspective view showing the configuration of busbar 500 according to the present embodiment. Specifically, FIG. 5 shows a bus bar 510 and a bus bar 520 in the negative direction of the X axis among the bus bars 500, and the power storage elements 200 (201, 202, 205 and 206) to which the bus bars 510 and 520 are connected. ing. Three busbars 510 out of busbars 500 have the same configuration, and busbars 520 and 530 have the same configuration, so in FIG. .
  • the bus bar 510 has a connecting portion 511, a connecting portion 512, a connecting portion 513, a connecting portion 514, a connecting portion 515, a connecting portion 516, and a connecting portion 517.
  • the busbar 520 has a connection portion 521 , a connection portion 522 , a connection portion 523 , and a connecting portion 524 .
  • the connecting portion 511 is a plate-like and rectangular portion parallel to the XZ plane, which is connected (joined) to the electrode terminal 223 of the power storage element 201 in the positive direction of the X-axis.
  • the electrode terminal 223 is a positive electrode terminal (positive electrode terminal).
  • the connection portion 512 is a plate-like rectangular portion parallel to the XZ plane, which is arranged in the Z-axis negative direction of the connection portion 511 and is connected (joined) to the electrode terminal 224 of the power storage element 205 in the X-axis positive direction. is.
  • the electrode terminal 224 is a positive electrode terminal (positive electrode terminal).
  • the connecting portion 513 is a plate-like rectangular portion parallel to the XZ plane, which is arranged in the positive direction of the X-axis of the connecting portion 511 and is connected (joined) to the electrode terminal 225 of the power storage element 202 in the negative direction of the X-axis. is.
  • the electrode terminal 225 is a negative electrode terminal (negative terminal).
  • the connection portion 514 is a plate-like rectangular portion parallel to the XZ plane, which is arranged in the negative Z-axis direction of the connection portion 513 and is connected (joined) to the electrode terminal 226 of the power storage element 206 in the negative X-axis direction. is.
  • the electrode terminal 226 is a negative electrode terminal (negative terminal).
  • the connecting portion 515 is a substantially C-shaped protruding portion that protrudes in the negative Y-axis direction from the edge of the connecting portion 511 in the positive direction of the X-axis and the edge of the connecting portion 513 in the negative direction of the X-axis. is.
  • the connecting portion 516 is a substantially C-shaped protruding portion when viewed from the Z-axis direction, protruding in the negative Y-axis direction from the edge of the connecting portion 512 in the positive direction of the X-axis and the edge of the connecting portion 514 in the negative direction of the X-axis. is.
  • the connecting portion 517 is a substantially C-shaped concave portion that is recessed in the positive Y-axis direction from the edge of the connecting portion 515 in the negative Z-axis direction and the edge of the connecting portion 516 in the positive Z-axis direction.
  • the connecting portion 515 connects the connecting portions 511 and 513
  • the connecting portion 516 connects the connecting portions 512 and 514
  • the connecting portion 517 connects the connecting portions 515 and 516 .
  • the connecting portion 521 is a plate-like and rectangular portion parallel to the XZ plane, which is connected (joined) to the electrode terminal 221 of the power storage element 201 in the negative direction of the X-axis.
  • the electrode terminal 221 is a negative electrode terminal (negative terminal).
  • the connecting portion 522 is a flat plate-like rectangular portion parallel to the XZ plane, which is arranged in the negative Z-axis direction of the connecting portion 521 and is connected (joined) to the electrode terminal 222 of the power storage element 205 in the negative X-axis direction. is.
  • the electrode terminal 221 is a negative electrode terminal (negative terminal).
  • the connecting portion 523 is a plate-like and rectangular portion parallel to the XY plane that protrudes in the negative Y-axis direction from the edge in the positive Z-axis direction of the portion on the negative X-axis side of the connecting portion 522 .
  • the connection portion 523 is connected (joined) to the external terminal 31 a of the bus bar 31 of the terminal unit 30 .
  • the connecting portion 524 extends along the Y-axis from the edge of the connecting portion 521 in the positive direction of the X-axis in the negative direction of the Z-axis and the edge of the end of the connecting portion 522 in the positive direction of the X-axis in the positive direction of the Z-axis. It is a substantially C-shaped protruding portion protruding in the negative direction when viewed from the X-axis direction. Thereby, the connecting portion 524 connects the connecting portions 521 and 522 .
  • FIG. 6 is a perspective view showing the configuration of busbar cover 600 according to the present embodiment.
  • FIG. 7 is a perspective view showing the configuration of busbar cover 600 and its periphery according to the present embodiment. Specifically, (a) of FIG. 7 shows the state before the busbar cover 600 is arranged with respect to the power storage element 200, the busbar plate 400, and the busbar 500, and (c) of FIG. It shows the state after placement. (b) of FIG. 7 shows the configuration of the end portion of the busbar plate 400 in the negative direction of the X axis.
  • FIG. 6 is a perspective view showing the configuration of busbar cover 600 according to the present embodiment.
  • FIG. 7 is a perspective view showing the configuration of busbar cover 600 and its periphery according to the present embodiment. Specifically, (a) of FIG. 7 shows the state before the busbar cover 600 is arranged with respect to the power storage element 200, the busbar plate 400, and the busbar 500, and (c) of FIG. It shows the state after placement. (b
  • FIG. 8 is a cross-sectional view showing the configuration of busbar cover 600 and its surroundings according to the present embodiment. Specifically, FIG. 8 shows a cross section of a configuration in which the second exterior body 120, the power storage element 200, the busbar plate 400, the busbar 500, and the busbar cover 600 are arranged, cut along a plane parallel to the XY plane.
  • the busbar cover 600 has first cover portions 610 (611, 612 and 613) and second cover portions 620 (621, 622 and 623).
  • the first cover part 610 is a plate-like (sheet-like) part that is arranged in the Y-axis negative direction of the power storage element 200 and that is long in the X-axis direction and parallel to the XZ plane.
  • one first cover portion 610 is arranged corresponding to two power storage elements 200 arranged in the Z-axis direction (see FIG. 7, etc.).
  • Four first cover portions 610 are arranged side by side in the X-axis direction corresponding to the eight power storage elements 200 .
  • the first cover portion 611 is arranged in the Y-axis negative direction of the power storage elements 202 and 206 and the power storage elements 203 and 207, respectively.
  • a first cover portion 612 is arranged in the Y-axis negative direction of the storage elements 201 and 205 .
  • a first cover portion 613 is arranged in the Y-axis negative direction of the storage elements 204 and 208 .
  • a first through hole 610a is formed in each of the first cover portions 610 (611, 612 and 613).
  • the first through-hole 610a is a substantially rectangular through-hole that penetrates the first cover portion 610 in the Y-axis direction and is disposed at a position facing the gas discharge valve 212a of the storage element 200 (see FIGS. 7 and 8). ).
  • Each of the storage elements 200 has a gas exhaust valve 212 a at a position facing the first cover portion 610 .
  • Each of the first cover portions 610 is formed with two first through holes 610a aligned in the Z-axis direction at the central portion in the X-axis direction.
  • Each first through-hole 610a is arranged at a position facing the gas exhaust valve 212a of each storage element 200 .
  • the first through hole 610a has a shape larger than the gas exhaust valve 212a when viewed from the Y-axis direction.
  • a convex portion 420 (see FIG. 7(b)) of the busbar plate 400 is arranged between the gas exhaust valve 212a and the first through hole 610a.
  • the convex portion 420 is a portion provided on the busbar plate 400 and having a function of guiding the gas from the gas exhaust valve 212a to the first through hole 610a.
  • the busbar plate 400 has a plate main body 410 which is a main body facing the power storage element 200, and a gas discharge valve 212a is provided at a position facing the gas discharge valve 212a of the plate main body 410 when viewed in the Y-axis direction.
  • a rectangular through hole larger than 212a is formed.
  • the convex portion 420 is a wall portion that protrudes in the Y-axis negative direction from the periphery of the through hole of the plate body 410 , and is arranged in contact with the periphery of the first through hole 610 a in the first cover portion 610 .
  • the first cover portions 612 and 613 are further formed with second through holes 610b. Specifically, a second A through hole 610b is formed.
  • the second through-hole 610b is an elongated slit-shaped through-hole extending in the X-axis direction through the first cover portions 612 and 613 in the Y-axis direction, through which the bus bars 520 and 530 are arranged.
  • the bus bar 520 has a connection portion 523 that protrudes toward the long side wall 120b of the second exterior body 120 of the exterior body 100 in the negative Y-axis direction. It penetrates through hole 610b (see FIG. 7).
  • the connecting portion 523 can be connected to the busbar 31 of the terminal unit 30, and the power storage element 200 is connected to the external terminal 31a of the busbar 31 (see FIG. 8).
  • the long side wall 120b of the second exterior body 120 of the exterior body 100 in the Y-axis negative direction is an example of a metal wall portion arranged at a position sandwiching the bus bar 500 with the power storage element 200 .
  • the connection portion 523 of the busbar 520 is an example of a second projecting portion projecting toward the wall portion.
  • a second projecting portion of the bus bar 520 penetrates through the second through hole 610b.
  • the second projecting portion of the bus bar 530 penetrates the second through hole 610 b of the first cover portion 613 .
  • the second cover portion 620 is a protruding portion having an uneven structure in which the surface in the positive Y-axis direction is recessed in the negative Y-axis direction and the surface in the negative Y-axis direction protrudes from the first cover portion 610 in the negative Y-axis direction. is.
  • three second cover portions 621 are arranged between each of the four first cover portions 610 .
  • a second cover portion 622 is arranged at the central portion in the X-axis direction and the central portion in the Z-axis direction of the first cover portion 612 .
  • a second cover portion 623 is arranged at the end portion of the first cover portion 613 in the plus direction of the X-axis and the center portion in the Z-axis direction.
  • the second cover portions 622 and 623 are arranged at positions adjacent to the second through hole 610b.
  • the second cover portion 621 has a pair of short side surfaces on both sides in the X-axis direction, a long side surface in the negative Y-axis direction, and an upper surface in the positive Z-axis direction.
  • the surface of the second cover portion 621 in the negative Z-axis direction is open, and the opening is closed by the busbar plate 400 (see FIG. 7), but the second cover portion 621 has a bottom surface in the negative Z-axis direction.
  • the second cover portion 622 has a pair of short side surfaces on both sides in the X-axis direction, a long side surface in the negative Y-axis direction, a top surface in the positive Z-axis direction, and a bottom surface in the negative Z-axis direction. ing.
  • the second cover portion 623 has a configuration similar to that of the second cover portion 622 .
  • the second cover portions 622 and 623 are smaller in size when viewed in the Y-axis direction than the second cover portion 621, and have the same amount of protrusion as the second cover portion 621 in the Y-axis direction.
  • the connecting portions 515 and 516 of the busbar 510 are accommodated in the second cover portion 621 .
  • the busbar 510 has connecting portions 515 and 516 that protrude toward the long side wall 120b of the second exterior body 120 of the exterior body 100 in the negative Y-axis direction.
  • the second cover portion 621 is recessed toward the long side wall 120b, and accommodates the connecting portions 515 and 516 in the recessed portion.
  • the connecting portion 524 of the bus bar 520 is accommodated in the second cover portion 622 .
  • Bus bar 520 has a connecting portion 524 that protrudes toward long side wall 120b.
  • the second cover portion 622 is recessed toward the long side wall 120b, and accommodates the connecting portion 524 in the recessed portion.
  • the long side wall 120b of the second exterior body 120 of the exterior body 100 in the Y-axis negative direction is an example of a metal wall portion arranged at a position sandwiching the bus bar 500 with the power storage element 200 .
  • the connecting portions 515 and 516 of the busbar 510 and the connecting portion 524 of the busbar 520 are examples of the first projecting portion projecting toward the wall portion.
  • the busbar 500 has a first protrusion that protrudes toward the metal wall, and the second cover 620 is recessed toward the wall to accommodate the first protrusion in the recessed portion.
  • busbar cover 600 is arranged between busbar 500 and the wall portion of second exterior body 120 so as to cover the entire surface of busbar 500 other than the second projecting portion.
  • busbar cover 600 is provided between busbar 500 and long side wall 120b, which is a metal wall portion of exterior body 100.
  • Busbar cover 600 has a first cover portion 610 at a position closer to power storage element 200 than part of busbar 500 .
  • first cover portion 610 of busbar cover 600 is arranged at a position closer to power storage element 200 than part of busbar 500 .
  • a space is created between the position of the first cover portion 610 in the busbar cover 600 and the long side wall 120b of the exterior body 100, so that the space can be effectively used and space can be saved.
  • the first cover portion 610 is arranged at a position close to the storage element 200, if the storage element 200 has the gas discharge valve 212a at a position facing the first cover portion 610, the gas discharge valve 212a When the gas is released, the gas collides with the first cover part 610 . If the gas collides with the first cover portion 610, the exhaust of the gas may be hindered or the first cover portion 610 may be damaged. For this reason, a first through hole 610a is formed at a position of the first cover portion 610 facing the gas exhaust valve 212a.
  • the gas can be prevented from colliding with the first cover portion 610, so that the exhaustion of gas is inhibited and the first cover portion 610 is prevented from being damaged. can be suppressed.
  • the insulating busbar plate 400 between the storage element 200 and the busbar 500 is provided with a projection 420 that guides the gas from the gas discharge valve 212a of the storage element 200 to the first through hole 610a of the busbar cover 600 .
  • the gas from the gas exhaust valve 212a can be easily guided to the first through hole 610a of the busbar cover 600.
  • FIG. Therefore, even if the gas is discharged from the gas discharge valve 212a, the collision of the gas with the first cover portion 610 can be further suppressed. more controllable.
  • the busbar 510 has a first projecting portion (connecting portions 515 and 516) projecting toward the long side wall 120b of the exterior body 100. As shown in FIG. Bus bar 520 also has a first projecting portion (connecting portion 524) projecting toward long side wall 120b. The same is true for bus bar 530 .
  • the busbar cover 600 is provided with a second cover portion 620 that is recessed toward the long side wall 120b and accommodates the first projecting portion in the recessed portion. Thereby, even if the bus bar 500 has the first projecting portion, insulation between the first projecting portion and the long side wall 120b can be ensured.
  • the busbar 520 is provided with a second projecting portion (connecting portion 523 ) projecting toward the long side wall 120 b of the exterior body 100 .
  • the bus bar 530 is provided with a second projecting portion for connecting with the external terminal 21 .
  • the busbar cover 600 is formed with a second through hole 610b through which the second projection penetrates. This allows the busbars 520 and 530 to protrude toward the long side wall 120b with a simple configuration.
  • the second exterior body 120 of the exterior body 100 is a bottomed rectangular tubular member having an opening formed in the negative direction of the Z axis
  • the first exterior body 110 is the second exterior body.
  • 120 is a flat rectangular member that closes the opening.
  • the first exterior body 110 is a bottomed rectangular cylindrical member with an opening formed in the positive direction of the Z axis
  • the second exterior body 120 is a flat rectangular shape that closes the opening of the first exterior body 110 . It may be a shaped lid or any other shape.
  • the second exterior body 120 is entirely made of a metal member. may be of non-metal construction.
  • the long side wall 120b in which the through hole 125 is formed may also be made of an insulating member such as resin instead of metal.
  • the second exterior body 120 may be an insulating member such as resin as a whole.
  • the long side wall 120 b or the second exterior body 120 can be made of any insulating resin material or the like that can be used for the spacer 300 .
  • the first cover portion 610 of the busbar cover 600 has the first through hole 610a at the position facing the gas discharge valve 212a of the storage element 200.
  • the power storage element 200 may have the gas discharge valve 212a on the side different from the first cover portion 610, and the first through hole 610a may not be formed in the first cover portion 610.
  • the connecting portion 523 of the bus bar 520 passing through the second through hole 610b of the first cover portion 612 is not connected to the bus bar 31 having the external terminal 31a, but is connected to any conductive member.
  • the second through-hole 610 b is a slit-shaped through-hole elongated in the X-axis direction, it may be changed as appropriate according to the shape of the connection portion 523 of the bus bar 520 .
  • the second through hole 610 b is not formed in the first cover portion 612 , and the connecting portion 523 of the busbar 520 may bypass the first cover portion 612 .
  • the second cover portion 620 of the busbar cover 600 is a projecting portion having an uneven structure in which the surface in the positive Y-axis direction is recessed and the surface in the negative Y-axis direction projects.
  • the first projecting portion of the busbar 500 is accommodated.
  • the second cover portion 620 is a recessed portion that is recessed on the surface in the positive Y-axis direction but does not project in the negative Y-axis direction, and is configured to accommodate the first projecting portion of the bus bar 500 in the recessed portion. It's okay.
  • Second cover portion 620 may have another shape, and may be changed as appropriate according to the shape of the first projecting portion of bus bar 500 .
  • the bus bar 500 may be provided with connection terminals (protrusions) for voltage measurement.
  • the busbar cover 600 is preferably arranged so as to also cover the connection terminals.
  • a thermistor may be arranged on storage element 200 or busbar 500, and in this case, busbar cover 600 is preferably arranged so as to cover the thermistor as well. If the connection terminals, thermistors, or other members protrude in the Y-axis negative direction, the busbar cover 600 has a cover portion that accommodates the connection terminals, thermistors, or other members. good too.
  • the power storage device 1 does not need to include all the components described above. Power storage device 1 may not include control unit 20, terminal unit 30, spacer 300, bus bar plate 400, or the like.
  • the present invention can be implemented not only as the power storage device 1, but also as the busbar cover 600 or a combination of the busbar 500 and the busbar cover 600.
  • the present invention can be applied to a power storage device having a power storage element such as a lithium ion secondary battery.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Sealing Battery Cases Or Jackets (AREA)

Abstract

L'invention concerne un dispositif de stockage d'énergie comprenant : un élément de stockage d'énergie ; une barre omnibus ; un corps extérieur ayant une section de paroi qui, conjointement avec l'élément de stockage d'énergie, prend en sandwich la barre omnibus ; et un couvercle de barre omnibus isolant disposé entre la barre omnibus et la section de paroi. Le couvercle de barre omnibus a une première partie de couvercle disposée dans une position plus proche de l'élément de stockage d'énergie qu'une partie de la barre omnibus.
PCT/JP2022/021216 2021-06-04 2022-05-24 Dispositif de stockage d'énergie WO2022255162A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2021094698 2021-06-04
JP2021-094698 2021-06-04

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Publication Number Publication Date
WO2022255162A1 true WO2022255162A1 (fr) 2022-12-08

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014003019A (ja) * 2012-06-20 2014-01-09 Samsung Sdi Co Ltd 二次電池およびそのモジュール
WO2019150704A1 (fr) * 2018-01-31 2019-08-08 三洋電機株式会社 Procédé d'interruption de courant d'entrée dans un système de piles, système de piles, dispositif d'alimentation électrique pourvu d'un système de piles et dispositif de stockage d'électricité
WO2019176560A1 (fr) * 2018-03-16 2019-09-19 株式会社Ｇｓユアサ Dispositif de stockage d'énergie

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014003019A (ja) * 2012-06-20 2014-01-09 Samsung Sdi Co Ltd 二次電池およびそのモジュール
WO2019150704A1 (fr) * 2018-01-31 2019-08-08 三洋電機株式会社 Procédé d'interruption de courant d'entrée dans un système de piles, système de piles, dispositif d'alimentation électrique pourvu d'un système de piles et dispositif de stockage d'électricité
WO2019176560A1 (fr) * 2018-03-16 2019-09-19 株式会社Ｇｓユアサ Dispositif de stockage d'énergie

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