WO2023013466A1 - Power storage device - Google Patents

Power storage device Download PDF

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Publication number
WO2023013466A1
WO2023013466A1 PCT/JP2022/028720 JP2022028720W WO2023013466A1 WO 2023013466 A1 WO2023013466 A1 WO 2023013466A1 JP 2022028720 W JP2022028720 W JP 2022028720W WO 2023013466 A1 WO2023013466 A1 WO 2023013466A1
Authority
WO
WIPO (PCT)
Prior art keywords
power storage
insulating member
axis direction
side member
storage element
Prior art date
Application number
PCT/JP2022/028720
Other languages
French (fr)
Japanese (ja)
Inventor
修 牛嶌
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
Priority to JP2023540270A priority Critical patent/JPWO2023013466A1/ja
Publication of WO2023013466A1 publication Critical patent/WO2023013466A1/en

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/209—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for prismatic or rectangular cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/249—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for aircraft or vehicles, e.g. cars or trains
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/262—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with fastening means, e.g. locks
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/262—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with fastening means, e.g. locks
    • H01M50/264—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with fastening means, e.g. locks for cells or batteries, e.g. straps, tie rods or peripheral frames
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/271—Lids or covers for the racks or secondary casings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/289—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—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
    • H01M50/593—Spacers; Insulating plates
    • 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.
  • Patent Document 1 discloses a battery pack (power storage device) in which a battery cell (power storage element) is sandwiched between a pair of end plates (end members), and the pair of end plates (end members) are connected by side plates (side members). device) is disclosed.
  • the present invention has been made by the inventors of the present invention, who have newly paid attention to the above problems, and provides an electric storage device in which an insulating member arranged to face an electric storage element can be easily fixed to the electric storage element. With the goal.
  • a power storage device includes a power storage element, a pair of end members sandwiching the power storage element in a first direction, and facing the power storage element in a second direction intersecting the first direction. , a side member connecting the pair of end members; and an insulating member arranged to face the storage element in a third direction intersecting the first direction and the second direction, wherein the insulating member and the One of the side members has a protrusion projecting toward the other of the insulating member and the side member, and the other of the insulating member and the side member has an opening or a recess into which the protrusion is inserted.
  • the insulating member is attached to the side member by inserting the protrusion into the opening or the recess.
  • the present invention can be realized not only as such a power storage device, but also as a combination of a side member and an insulating member.
  • the insulating member arranged to face the power storage element can be easily fixed to the power storage element.
  • 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 each component when the power storage device according to the embodiment is exploded.
  • FIG. 3 is a perspective view showing the structure of the storage device according to the embodiment.
  • FIG. 4 is a perspective view showing the configuration of the side member according to the embodiment.
  • 5A and 5B are a perspective view, a side view, and a cross-sectional view showing the configuration of the insulating member according to the embodiment.
  • 6A and 6B are a perspective view and a cross-sectional view showing the configuration in which the insulating member according to the embodiment is attached to the side member.
  • 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 each component when the power storage device according to the embodiment is exploded.
  • FIG. 3 is a perspective view showing the structure of the storage device according to the embodiment.
  • FIG. 4 is
  • FIG. 7 is a perspective view showing a configuration in which an insulating member according to the embodiment is attached to side members.
  • 8A is a cross-sectional view showing a configuration in which an insulating member according to a modification of the embodiment is attached to a side member;
  • FIG. 8B is a cross-sectional view showing a configuration in which an insulating member according to a modification of the embodiment is attached to a side member;
  • FIG. 8C is a cross-sectional view showing a configuration in which the insulating member according to the modified example of the embodiment is attached to the side member.
  • a power storage device includes a power storage element, a pair of end members sandwiching the power storage element in a first direction, and facing the power storage element in a second direction intersecting the first direction.
  • a side member that connects the pair of end members;
  • One of the member and the side member has a protrusion projecting toward the other of the insulating member and the side member, and the other of the insulating member and the side member has an opening into which the protrusion is inserted.
  • a recess is provided, and the insulating member is attached to the side member by inserting the projecting portion into the opening or the recess.
  • the insulating member can be easily attached to the side member by adopting a configuration in which the projecting portion of one of the insulating member and the side member is inserted into the opening or recess of the other.
  • the insulating member is attached to the side member in a state in which movement in the third direction, which is the direction facing the electric storage element, is restricted, so that the insulating member is restrained from moving with respect to the electric storage element.
  • the one of the insulating member and the side member is the insulating member, and the protruding portion protrudes toward the side member in the second direction. may be placed.
  • the insulating member can generally be formed of a material such as resin that is easy to process
  • the projecting portion can be easily formed by forming the projecting portion projecting in the second direction on the insulating member. This makes it possible to easily form a structure for attaching the insulating member to the side member.
  • the one of the insulating member and the side member has a plurality of protrusions, and the plurality of protrusions constitutes one opening.
  • the insulating member may be attached to the side member by being inserted into the recess.
  • the plurality of protrusions of one of the insulating member and the side member is inserted into one opening or recess formed in the other, so that the plurality of protrusions can be deformed independently.
  • the protrusion can be easily inserted into the opening or recess because the projection is inserted into one opening or recess as a single contact.
  • the plurality of protrusions are arranged side by side with a gap in the first direction, and the plurality of protrusions extend in the first direction.
  • the insulating member may be attached to the side member by being inserted into the opening or recess.
  • the plurality of projecting portions of one of the insulating member and the side member are arranged side by side in the first direction, and are inserted into the openings or recesses of the other member extending in the first direction.
  • An insulating member can be attached to the side member across the direction.
  • the power storage device further includes a spacer arranged in parallel with the power storage element in the first direction, wherein the spacer is inserted into a space between the plurality of protrusions. may be placed.
  • the spacer is inserted into the space between the plurality of protrusions of one of the insulating member and the side member, so that the length of the spacer can be increased in the second direction, and the insulation can be improved.
  • Spacers may also provide positioning of the protrusions. This makes it possible to easily attach the insulating member to the side member while ensuring insulation.
  • the direction in which a plurality of energy storage elements are arranged is defined as the X-axis direction.
  • the Y-axis direction is defined as the direction in which a pair of electrode terminals (positive electrode side and negative electrode side) in one energy storage element are aligned, the direction in which the short sides of the container of the energy storage element face each other, or the direction in which a pair of side members are aligned.
  • the alignment direction or 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.
  • the X-axis direction indicates either or both of the X-axis plus direction and the X-axis minus direction.
  • the Y-axis direction and the Z-axis direction may also be referred to as the first direction
  • the Y-axis direction may also be referred to as the second direction
  • the Z-axis direction may also be referred to as the third direction.
  • Expressions indicating relative directions or orientations also include cases where the directions or orientations are not strictly speaking.
  • two directions being parallel not only means that the two directions are completely parallel, but also being substantially parallel, that is, including a difference of about several percent, for example. means.
  • the expression “insulation” means "electrical insulation”.
  • FIG. 1 is a perspective view showing the appearance of power storage device 10 according to the present embodiment.
  • FIG. 2 is an exploded perspective view showing each component when power storage device 10 according to the present embodiment is exploded.
  • the power storage device 10 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 10 is a battery module (assembled battery) used for power storage or power supply.
  • the power storage device 10 is used for driving mobile bodies such as automobiles, motorcycles, water crafts, ships, snowmobiles, agricultural machinery, construction machinery, or railroad 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 10 can also be used as a stationary battery or the like for home or business use.
  • the power storage device 10 has an exterior body 100 . As shown in FIG. 2, a plurality of storage elements 200, a plurality of spacers 300, a pair of end members 400, a pair of side members 500, an insulating member 600, a plurality of bus bars 700, and the like are provided inside the exterior body 100. is accommodated.
  • the power storage device 10 includes electrical components such as a substrate, relays, fuses, shunt resistors, and connectors, an exhaust section for exhausting gas discharged from the power storage element 200 to the outside of the exterior body 100, and the like. may be provided.
  • 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 10 .
  • the exterior body 100 is arranged outside the plurality of power storage elements 200 and the like, fixes the plurality of power storage elements 200 and the like at predetermined positions, and protects them from impacts and the like.
  • the exterior body 100 is made of, for example, 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, or an insulating member such as a composite material thereof, or a metal coated with an insulating coating.
  • the exterior body 100 thereby prevents the power storage element 200 and the like from coming into contact with an external metal member or the like.
  • the exterior body 100 may be made of a conductive member such as metal as long as the insulation of the power storage element 200 and the like is maintained.
  • the exterior body 100 has an exterior body main body 110 that constitutes the main body of the exterior body 100 and an exterior body lid 120 that constitutes the lid of the exterior body 100 .
  • the exterior body main body 110 is a bottomed rectangular cylindrical housing (casing) having an opening, and accommodates the power storage element 200 and the like.
  • the exterior cover 120 is a flat rectangular member that closes the opening of the exterior main body 110 .
  • the exterior body lid 120 is joined to the exterior body main body 110 by an adhesive, heat sealing, ultrasonic welding, or the like.
  • the exterior body 100 has a structure in which the inside is sealed (sealed).
  • a pair of external terminals 121 (on the positive electrode side and the negative electrode side) are provided on the outer cover body 120 .
  • Power storage device 10 charges electricity from the outside and discharges electricity to the outside through the pair of external terminals 121 .
  • the power storage element 200 is a secondary battery (single battery) capable of charging and discharging electricity, specifically a non-aqueous electrolyte secondary battery such as a lithium ion secondary battery.
  • Energy storage element 200 has a flattened rectangular parallelepiped shape (square shape), and in the present embodiment, eight energy storage elements 200 are arranged side by side in the X-axis direction.
  • the size and shape of the power storage element 200, the number of power storage elements 200 to be arranged, and the like are not limited, and for example, only one power storage element 200 may be arranged.
  • 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 pouch-type storage element. A detailed description of the configuration of the storage element 200 will be given later.
  • Spacer 300 is arranged side by side with power storage element 200 (X-axis plus direction or X-axis minus direction) in the X-axis direction (first direction), side by side with power storage element 200, and insulates power storage element 200 from other members. It is a flat plate-shaped and rectangular member.
  • the spacers 300 are arranged between two adjacent energy storage elements 200 and between the end energy storage element 200 and the end member 400, and are arranged between the two energy storage elements 200 and the end energy storage elements. 200 and the end member 400 are insulated. In the present embodiment, nine spacers 300 are arranged corresponding to eight power storage elements 200, but the arrangement position and number of spacers 300 are not particularly limited.
  • the spacer 300 is a member having insulating properties such as any resin material that can be used for the exterior body 100, or a member having heat insulating properties such as a damper material formed by accumulating and bonding mica pieces. etc.
  • the end member 400 and the side member 500 are restraining members that externally press (restrain) the storage elements 200 in the direction in which the plurality of storage elements 200 are arranged (X-axis direction).
  • the end members 400 and the side members 500 sandwich the plurality of power storage elements 200 from both sides in the alignment direction, thereby pressing (restraining) each power storage element 200 included in the plurality of power storage elements 200 from both sides in the alignment direction.
  • the end member 400 and the side member 500 are formed of a metal member such as steel or stainless steel from the viewpoint of ensuring strength, but the material is not particularly limited, and the end member 400 and the side member 500 are formed of a high-strength insulating member. Alternatively, a metal member may be subjected to an insulation treatment.
  • the end members 400 are arranged on both sides of the plurality of energy storage elements 200 and the plurality of spacers 300 in the X-axis direction (first direction), so that the plurality of energy storage elements 200, etc. It is a plate-like rectangular restraining member (end plate) that is sandwiched and held.
  • the pair of end members 400 are arranged at positions sandwiching the plurality of energy storage elements 200 and the plurality of spacers 300 in the X-axis direction to restrain them.
  • the end member 400 may be a flat block-shaped member or the like instead of a plate-shaped member.
  • the side members 500 are arranged on both sides of the plurality of energy storage elements 200 and the plurality of spacers 300 in the Y-axis direction (the second direction that intersects with the first direction) so as to face the plurality of energy storage elements 200 and the like in the Y-axis direction. It is a plate-shaped and elongated restraining member (side plate). Both ends of the pair of side members 500 are attached to the pair of end members 400 , and by connecting the pair of end members 400 , the plurality of power storage elements 200 and the plurality of spacers 300 are bound.
  • the side member 500 extends in the X-axis direction so as to straddle the plurality of energy storage elements 200 and the plurality of spacers 300, and exerts a restraining force in the arrangement direction (X-axis direction) on the plurality of energy storage elements 200 and the like.
  • the side member 500 may be a long rod-shaped member or the like instead of a plate-shaped member.
  • the pair of side members 500 are attached to the Y-axis direction ends of the pair of end members 400 at both ends in the X-axis direction. Accordingly, the pair of side members 500 and the pair of end members 400 sandwich and constrain the plurality of power storage elements 200 and the like from both sides in the X-axis direction and both sides in the Y-axis direction.
  • the side member 500 is connected (joined) to the connecting member 400a of the end member 400 by a plurality of (two in this embodiment) connecting members 500a arranged in the Z-axis direction.
  • connecting member 400a is a bolt (screw)
  • connecting member 500a is a nut. 400 and the side member 500 are fastened.
  • the connection (joining) between the end member 400 and the side member 500 is not limited to fixing with bolts and nuts, and may be joined by welding, adhesion, or the like. A detailed description of the configuration of the side member 500 will be given later.
  • the insulating member 600 is a flat and rectangular member (also called a busbar holder, a busbar frame, or a busbar plate) that insulates the busbar 700 from other members and regulates the position of the busbar 700 .
  • the insulating member 600 is arranged to face the power storage element 200 in the Z-axis direction (the third direction intersecting the first direction and the second direction). Specifically, the insulating member 600 is arranged in the Z-axis positive direction of the plurality of power storage elements 200 and placed on the plurality of power storage elements 200 . Insulating member 600 is positioned with respect to power storage elements 200 and busbar 700 is positioned with respect to insulating member 600 , whereby busbar 700 is positioned with respect to power storage elements 200 .
  • the insulating member 600 is formed of, for example, a member having insulating properties such as any resin material that can be used for the exterior body 100 described above. A detailed description of the configuration of the insulating member 600 will be given later.
  • the bus bar 700 is a plate-shaped member connected to the power storage element 200 .
  • the bus bar 700 is arranged above the plurality of power storage elements 200 and connected (joined) to the electrode terminals 240 (see FIG. 3 etc.) of the plurality of power storage elements 200 .
  • the bus bar 700 connects the electrode terminals 240 of the plurality of storage elements 200 to each other and electrically connects the electrode terminals 240 of the storage elements 200 at the ends to the external terminals 121 .
  • bus bar 700 connects two power storage elements 200 in parallel to form four power storage element groups, and connects the four power storage element groups in series.
  • connection form of the bus bar 700 is not particularly limited, and a plurality of power storage elements 200 may be connected in series or in parallel in any combination, or all power storage elements 200 may be connected in series or in parallel.
  • Bus bar 700 and electrode terminal 240 are connected (joined) by welding, but the form of connection is not particularly limited.
  • Bus bar 700 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.
  • FIG. 3 is a perspective view showing the structure of the storage element 200 according to this embodiment. Specifically, FIG. 3 shows an enlarged appearance of one power storage element 200 out of the plurality of power storage elements 200 shown in FIG. Since the plurality of power storage elements 200 all have the same configuration, the configuration of one power storage element 200 will be described in detail below.
  • the electric storage element 200 includes a container 210 , a pair of electrode terminals 240 (positive electrode side and negative electrode side), and an upper gasket 250 . Inside the container 210, a lower gasket, an electrode body, a pair of current collectors (positive electrode side and negative electrode side), an electrolytic solution (non-aqueous electrolyte), etc. are accommodated, but illustration of these is omitted. .
  • the electrolytic solution the type 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.
  • the electric storage element 200 may have spacers arranged on the side or below the electrode body, an insulating film that wraps the electrode body and the like, and the like. Furthermore, an insulating film (shrink tube or the like) covering the outer surface of the container 210 may be arranged around the container 210 .
  • the material of the insulating film is not particularly limited as long as it can ensure the insulation required for the power storage element 200, but any insulating resin, epoxy resin, Kapton (registered trademark) that can be used for the exterior body 100 can be used. , Teflon (registered trademark), silicone, polyisoprene, and polyvinyl chloride.
  • the container 210 is a rectangular parallelepiped (square or box-shaped) case having a container body 220 with an opening and a container lid 230 closing the opening of the container body 220 .
  • the container main body 220 is a rectangular cylindrical member having a bottom that constitutes the main body of the container 210, and has an opening formed in the positive direction of the Z axis.
  • the container lid 230 is a rectangular plate-like member that constitutes the lid of the container 210 and is arranged to extend in the Y-axis direction in the positive Z-axis direction of the container body 220 .
  • the container lid 230 has a gas discharge valve 231 that releases the pressure inside the container 210 when the pressure inside the container 210 rises excessively, and an injection part (FIG.
  • the material of the container 210 is not particularly limited, and can be a weldable (joinable) metal such as stainless steel, aluminum, aluminum alloy, iron, or plated steel plate. can also be used.
  • the container 210 has a structure in which the inside is sealed (sealed) by joining the container body 220 and the container cover 230 by welding or the like after the electrode body and the like are housed inside the container body 220 .
  • the container 210 has a pair of long side surfaces 211 on both side surfaces in the X-axis direction, a pair of short side surfaces 212 on both side surfaces in the Y-axis direction, and a bottom surface 213 on the Z-axis negative direction side.
  • the long side surface 211 is a rectangular planar portion that forms the long side surface of the container 210 and is arranged to face the adjacent spacers 300 in the X-axis direction.
  • Long side 211 is adjacent to short side 212 and bottom 213 and has a larger area than short side 212 .
  • the short side surface 212 is a rectangular planar portion that forms the short side surface of the container 210 and is arranged to face the side member 500 in the Y-axis direction.
  • Short side 212 is adjacent to long side 211 and bottom surface 213 and has a smaller area than long side 211 .
  • the bottom surface 213 is a rectangular planar portion that forms the bottom surface of the container 210 and is arranged adjacent to the long side surface 211 and the short side surface 212 .
  • the electrode terminal 240 is a terminal member (a positive electrode terminal and a negative electrode terminal) of the storage element 200 arranged in the container lid 230, and is electrically connected to the positive electrode plate and the negative electrode plate of the electrode assembly via the current collector. ing.
  • the electrode terminal 240 is made of metal for leading electricity stored in the electrode body to the external space of the storage element 200 and for introducing electricity into the internal space of the storage element 200 to store the electricity in the electrode body. It is a member made of The electrode terminal 240 is made of aluminum, aluminum alloy, copper, copper alloy, or the like.
  • the electrode assembly 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.
  • the electrode body is formed by stacking electrode plates (a positive electrode plate and a negative electrode plate) in the X-axis direction.
  • the electrode body includes a wound electrode body formed by winding electrode plates (a positive electrode plate and a negative electrode plate), and a laminated (stacked) electrode formed by stacking a plurality of flat plate-shaped electrode plates.
  • the electrode body may have any form, such as a body or a bellows-shaped electrode body in which an electrode plate is folded into a bellows shape.
  • the current collector is a conductive member (a positive electrode current collector and a negative electrode current collector) that is electrically connected to the electrode terminal 240 and the electrode body.
  • the positive electrode current collector is made of aluminum, an aluminum alloy, or the like, like the positive electrode substrate layer of the positive electrode plate
  • the negative electrode current collector like the negative electrode substrate layer of the negative electrode plate, is made of copper, a copper alloy, or the like.
  • the upper gasket 250 is a gasket that is arranged between the container lid 230 and the electrode terminal 240 to insulate and seal between the container lid 230 and the electrode terminal 240 .
  • the lower gasket is a gasket that is arranged between the container lid 230 and the current collector to insulate and seal between the container lid 230 and the current collector.
  • the upper gasket 250 and the lower gasket may be made of any material as long as it has insulating properties.
  • FIG. 4 is a perspective view showing the configuration of the side member 500 according to this embodiment. Since the pair of side members 500 shown in FIG. 2 have the same configuration, FIG. 4 shows an enlarged view of the side member 500 of the pair of side members 500 in the minus Y-axis direction.
  • 5A and 5B are a perspective view, a side view, and a cross-sectional view showing the configuration of the insulating member 600 according to this embodiment. Specifically, (a) of FIG. 5 is an enlarged perspective view showing the appearance of the insulating member 600 shown in FIG.
  • FIG. 5(c) is a side view showing the configuration of FIG. 5(b) viewed from the side (Y-axis negative direction).
  • FIG. 5(d) is a cross-sectional view of the configuration of FIG. 5(b) taken along a plane parallel to the YZ plane through the line Vd--Vd.
  • FIG. 6A and 6B are a perspective view and a cross-sectional view showing the configuration in which the insulating member 600 according to the present embodiment is attached to the side member 500.
  • FIG. Specifically, (a) of FIG. 6 shows the internal configuration of the exterior body 100 with the bus bar 700 omitted for convenience of explanation (the power storage element 200, the spacer 300, the end member 400, the side member 500, and the Fig. 11 is a perspective view showing a configuration in which an insulating member 600 is assembled;
  • FIG. 6(b) is a perspective view showing an enlarged part of the Y-axis minus direction end and the Z-axis plus direction end of the configuration shown in FIG. 6(a).
  • FIG. 6(c) is a cross-sectional view of the configuration of FIG. 6(b) taken along a plane parallel to the YZ plane passing through line VIc--VIc.
  • FIG. 7 is a perspective view showing a configuration in which the insulating member 600 according to this embodiment is attached to the side member 500.
  • FIG. Specifically, (a) of FIG. 7 is a perspective view showing a configuration in which the storage element 200 and the spacer 300 are arranged.
  • (b) of FIG. 7 is a perspective view showing a configuration in which an insulating member 600 is arranged on the storage element 200 and the spacer 300 .
  • (c) of FIG. 7 is a perspective view showing a configuration in which the side member 500 is arranged on the storage element 200 , the spacer 300 and the insulating member 600 .
  • the side member 500 has a side member main body 510 and side member wall portions 520 .
  • the insulating member 600 has an insulating member main body 610 and a projecting portion 620 .
  • a side member main body 510 of the side member 500 is arranged to face the plurality of power storage elements 200 and the plurality of spacers 300 in the Y-axis direction, and is a plate-like rectangular portion parallel to the XZ plane extending in the X-axis direction. .
  • An opening 511 is formed in the side member main body 510 .
  • the opening 511 is arranged at the end of the side member main body 510 in the positive Z-axis direction, extends in the X-axis direction from one end of the side member main body 510 to the other end in the X-axis direction, and extends the side member main body 510 along the Y-axis. It is a through hole penetrating in the direction.
  • the side member wall portions 520 of the side member 500 are plate-shaped portions that protrude in the Y-axis direction from both ends of the side member main body 510 in the X-axis direction toward the end member 400 and extend in the Z-axis direction.
  • Each side member wall portion 520 is formed with a plurality of (two in the present embodiment) circular through-holes 521 aligned in the Z-axis direction.
  • the side member wall portion 520 is arranged overlapping the end member 400, the connection member 400a of the end member 400 is inserted into the through hole 521, and the connection member 400a and the connection member 500a are connected (joined), The side member 500 is fixed to the end member 400 (see FIG. 6, etc.).
  • An insulating member main body 610 of the insulating member 600 is a plate-shaped rectangular portion parallel to the XY plane that faces the plurality of power storage elements 200 in the Z-axis direction and is arranged in the positive Z-axis direction of the plurality of power storage elements 200. is.
  • the insulating member main body 610 has a plurality of openings 611 and flow path forming portions 612 .
  • the openings 611 are rectangular through holes arranged side by side in the X-axis direction at both ends of the insulating member main body 610 in the Y-axis direction and penetrating through the insulating member main body 610 in the Z-axis direction. placed.
  • five openings 611 are formed corresponding to five busbars 700 .
  • the flow path forming portion 612 is a concave portion extending in the X-axis direction at the center portion of the insulating member main body 610 in the Y-axis direction. .
  • the flow path forming portion 612 forms a flow path through which the gas discharged from the gas discharge valve 231 of the power storage element 200 flows.
  • the protruding portion 620 of the insulating member 600 is a portion arranged to protrude from the Y-axis direction end portion of the insulating member main body 610 toward the side member 500 in the Y-axis direction (second direction).
  • a plurality of projecting portions 620 are arranged at both ends of the insulating member main body 610 in the Y-axis direction.
  • a plurality of protrusions 620 are arranged corresponding to each of the plurality of power storage elements 200 .
  • eight protruding portions 620 aligned in the X-axis direction are arranged at both ends of the insulating member main body 610 in the Y-axis direction, corresponding to the eight power storage elements 200 aligned in the X-axis direction. ing.
  • the plurality of projecting portions 620 are arranged side by side at intervals in the X-axis direction (first direction), and a space 630 is formed between two adjacent projecting portions 620 .
  • Each protrusion 620 has a first protrusion 621 and a second protrusion 622 .
  • the first protruding portion 621 is a plate-like portion parallel to the XZ plane and extending in the negative Z-axis direction from the Y-axis direction end of the insulating member main body 610 .
  • the first projecting portion 621 has a shape in which the width in the X-axis direction becomes narrower toward the negative Z-axis direction (inverted trapezoidal shape in the present embodiment). have.
  • the space 630 formed between two adjacent first projecting portions 621 has a wider width in the X-axis direction toward the negative Z-axis direction.
  • the second protrusion 622 protrudes from the end of the first protrusion 621 in the negative Z-axis direction toward the side member 500 in the Y-axis direction (in FIGS. 5B to 5D , in the negative Y-axis direction protruding) and extending in the X-axis direction along the first protrusion 621 .
  • the second protruding portion 622 has chamfered corners in the positive Z-axis direction of the tip in the Y-axis direction.
  • one of the insulating member 600 and the side member 500 has a plurality of protruding portions 620 that protrude toward the other (side member 500 in this embodiment). and the other (side member 500 ) has an opening 511 .
  • the insulating member 600 is attached to the side member 500 by inserting the protrusion 620 of the insulating member 600 into the opening 511 of the side member 500 . That is, the insulating member 600 is attached to the side member 500 by inserting a plurality of protrusions 620 arranged in the X-axis direction (first direction) into one opening 511 extending in the X-axis direction (first direction). be done.
  • the spacer 300 protrudes from the power storage element 200 in the Y-axis direction. placed.
  • the insulating member 600 is arranged (placed) in the Z-axis plus direction of the storage element 200 and the spacer 300 .
  • the protruding portion of the spacer 300 is inserted into the space 630 between the plurality of protruding portions 620 (first protruding portions 621). be.
  • the space 630 has a width in the X-axis direction that increases toward the negative Z-axis direction, so that the space 630 has a shape that allows the spacer 300 to be easily inserted.
  • the side member 500 is arranged on the storage element 200, the spacer 300, and the insulating member 600 from the Y-axis direction.
  • the insulating member 600 is attached to the side member 500 by inserting the plurality of projections 620 of the insulating member 600 into one opening 511 formed in the side member 500 .
  • the second protrusion 622 of the protrusion 620 is inserted into the opening 511 .
  • the second protruding portion 622 has a chamfered corner portion in the positive Z-axis direction of the distal end portion, so that the second protruding portion 622 has a shape that facilitates insertion into the opening portion 511 .
  • the second protruding portion 622 may also be chamfered at the corner portion of the tip portion in the negative Z-axis direction.
  • the surface of the second projecting portion 622 in the positive Z-axis direction contacts the inner surface of the opening 511 in the positive Z-axis direction, and The direction surface is inserted into the opening 511 while being spaced from the inner surface of the opening 511 in the negative Z-axis direction.
  • the second projecting portion 622 (projecting portion 620) is arranged with its movement restricted by the openings 511 on both sides in the Z-axis direction.
  • the insulating member 600 is attached to the side member 500 in such a manner that its movement to both sides in the Z-axis direction (third direction) is restricted.
  • the insulating member 600 may be in contact with the side member 500 on both sides in the Z-axis direction, or may be in contact with the side member 500 on either side in the Z-axis direction. Both sides in the axial direction may be separated from the side member 500 . That is, the protrusion 620 (second protrusion 622) may be in contact with the opening 511 on both sides in the Z-axis direction, or may be in contact with the opening 511 on either side in the Z-axis direction. They may be in contact with each other, or both sides in the Z-axis direction may be separated from the opening 511 .
  • the insulating member 600 is in contact with the side member 500 in the positive Z-axis direction and is separated from the side member 500 in the negative Z-axis direction. It is configured to come into contact with As a result, the side member 500 can press the insulating member 600 toward the power storage element 200 in the negative Z-axis direction.
  • the insulating member 600 arranged to face the power storage element 200 in the Z-axis direction (third direction) is attached to the side member 500.
  • the protrusion 620 of one of the insulating member 600 and the side member 500 (the insulating member 600 in this embodiment) is inserted into the opening 511 of the other (the side member 500 in this embodiment). , the insulating member 600 can be easily attached to the side member 500 .
  • the insulating member 600 can generally be formed of a material that is easy to process, such as resin, by forming the projecting portion 620 projecting in the Y-axis direction (second direction) in the insulating member 600, the projecting portion 620 can be easily formed.
  • the side member 500 is made of a hard material such as metal, it has a simple shape with an opening 511 rather than a complicated shape like the protrusion 620 .
  • the structure for attaching the insulating member 600 to the side member 500 can be easily formed, so that the insulating member 600 can be easily fixed to the power storage element 200 .
  • One of the insulating member 600 and the side member 500 has a plurality of protrusions 620 that are inserted into one opening 511 formed in the other (the side member 500).
  • the projections 620 are independently deformed and inserted into one opening 511 . Therefore, the projecting portion 620 can be easily inserted into the opening portion 511 .
  • a plurality of protruding portions 620 of one of the insulating member 600 and the side member 500 (insulating member 600) are arranged side by side in the X-axis direction (first direction), and the other (side member 500) of the X-axis direction (first one direction). Thereby, the insulating member 600 can be attached to the side member 500 over the X-axis direction (first direction).
  • the protrusions 620 may interfere with each other, or the protrusions 620 may interfere with other members (spacers 300). etc.) can be suppressed.
  • the spacer 300 is arranged in the Y-axis direction (second direction). length can be lengthened, and insulation can be improved. Spacer 300 may also position protrusion 620 . This makes it possible to easily attach the insulating member 600 to the side member 500 while ensuring insulation.
  • the insulating member 600 is a busbar holder that regulates the position of the busbar 700.
  • the insulating member 600 is fixed to electrical components such as substrates, relays, fuses, shunt resistors, connectors, and wiring. It may be an insulating member or any other insulating member. In other words, the insulating member 600 may be any insulating member as long as it is arranged to face the storage element 200 in the Z-axis direction (third direction).
  • the insulating member 600 is composed of one member in the above embodiment, it may be composed of a plurality of members. If the insulating member 600 is configured by one member, the configuration of the insulating member 600 can be simplified.
  • the insulating member 600 is attached to both the pair of side members 500 in the above embodiment, it may be attached to only one of the pair of side members 500 .
  • the side member 500 has a through hole as the opening 511 that penetrates the side member main body 510 in the Y-axis direction. ) may be provided with a recess recessed in the Y-axis direction.
  • the second protrusion 622 of the protrusion 620 of the insulating member 600 is inserted into the recess 512 of the side member main body 510 of the side member 500, so that the insulating member 600 is extended to both sides in the Z-axis direction. is arranged in a state in which it can contact with the side member 500 at .
  • FIG. 8A is a cross-sectional view showing a configuration in which insulating member 600 according to a modification of the present embodiment is attached to side member 500.
  • FIG. FIG. 8A is a diagram corresponding to (c) of FIG.
  • the second projecting portion 622 of the projecting portion 620 of the insulating member 600 has a shape elongated in the X-axis direction. good.
  • the opening 511 of the side member 500 can also be configured so as not to extend in the X-axis direction.
  • the insulating member 600 is provided with the projecting portion 620, and the side member 500 is provided with the opening 511 into which the projecting portion 620 is inserted.
  • the member 600 may be provided with an opening or recess into which the protrusion is inserted.
  • the concave portion provided in the side member may not be a concave portion in which the surface of the side member main body 510 facing the insulating member 600 (protruding portion 620) is concave in the Y-axis direction.
  • the side member 500 may include a protrusion 513 with a recess formed by the protrusion 513 .
  • the side member 500 may include protrusions 513 with recesses formed between the protrusions 513 .
  • FIG. 8B is a cross-sectional view showing a configuration in which insulating member 600 according to a modification of the present embodiment is attached to side member 500. As shown in FIG. FIG. 8B is a diagram corresponding to (c) of FIG.
  • the plurality of projecting portions 620 are arranged side by side in the X-axis direction (first direction) at intervals. may be arranged side by side in one direction or another.
  • the openings 511 are formed in positions, sizes and shapes corresponding to the arrangement positions of the plurality of protrusions 620 .
  • the insulating member 600 and the side member 500 are provided with a plurality of projections 620 and one opening 511, and the plurality of projections 620 are inserted into one opening 511.
  • one protrusion 620 may be inserted into one opening 511 . That is, the insulating member 600 may have only one projection 620 and the one projection 620 may be inserted into one opening 511 .
  • a plurality of openings 511 corresponding to the plurality of projections 620 are provided in the side member 500 , and each projection 620 may be inserted into each opening 511 .
  • the insulating member 600 is attached to the side member 500 by inserting the projecting portion 620 into the opening 511. It may be fitted (press-fitted) into the portion 511 .
  • the second protrusion 622 of the protrusion 620 is inserted into the recess 512 of the side member main body 510 of the side member 500 by a snap-fit structure, so that the insulating member 600 extends in the Z-axis direction. It is arranged so that it can contact with the side member 500 on both sides.
  • FIG. 8C is a cross-sectional view showing a configuration in which insulating member 600 according to a modification of the present embodiment is attached to side member 500. As shown in FIG. FIG. 8C is a diagram corresponding to (c) of FIG.
  • the spacer 300 is inserted into the space 630 between the plurality of projecting portions 620, but a member other than the spacer 300 may be inserted into the space 630, or nothing may be inserted. may be configured.
  • the present invention can be realized not only as such a power storage device 10, but also as a combination of the side member 500 and the insulating member 600.
  • the present invention can be applied to a power storage device or the like having a power storage element such as a lithium ion secondary battery.
  • REFERENCE SIGNS LIST 10 power storage device 100 exterior body 200 power storage element 210 container 231 gas discharge valve 240 electrode terminal 300 spacer 400 end member 400a, 500a connection member 500 side member 510 side member main body 511, 611 opening 512 recess 513 projection 520 side member wall 521 Through hole 600 Insulating member 610 Insulating member main body 612 Flow path forming part 620 Protruding part 621 First protruding part 622 Second protruding part 630 Space 700 Bus bar

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Abstract

This power storage device comprises: a power storage element; a pair of end members with which the power storage element is sandwiched in a first direction; a side member that is disposed opposite to the power storage element in a second direction intersecting the first direction and that connects the pair of end members; and an insulation member that is disposed opposite to the power storage element in a third direction intersecting the first direction and the second direction. One of the insulation member and the side member has a protruding part protruding to the other, and the other has a recessed part or an opening part to which the protruding part is inserted. By inserting the protruding part to the opening part or the recessed part, the insulation member is attached to the side member.

Description

蓄電装置power storage device
　本発明は、蓄電素子を備える蓄電装置に関する。 The present invention relates to a power storage device including power storage elements.
　従来、蓄電素子と、蓄電素子を挟む一対のエンド部材と、一対のエンド部材を繋ぐサイド部材と、を備える蓄電装置が知られている。例えば、特許文献１には、バッテリセル（蓄電素子）が一対のエンドプレート（エンド部材）で挟まれ、一対のエンドプレート（エンド部材）がサイドプレート（サイド部材）で繋がれたバッテリパック（蓄電装置）が開示されている。 Conventionally, a power storage device is known that includes a power storage element, a pair of end members sandwiching the power storage element, and a side member connecting the pair of end members. For example, Patent Document 1 discloses a battery pack (power storage device) in which a battery cell (power storage element) is sandwiched between a pair of end plates (end members), and the pair of end plates (end members) are connected by side plates (side members). device) is disclosed.
特開２０１３－８４５５８号公報JP 2013-84558 A
　上記従来の蓄電装置において、蓄電素子に対向する位置にバスバーホルダ等の絶縁部材を配置し、当該絶縁部材を蓄電素子に対して固定したい場合がある。特許文献１では、蓄電素子に対向する位置に絶縁部材（バスバーカバー）が配置され、絶縁部材が、締結部材（ネジ）によってサイド部材に締結されることで蓄電素子に対して固定されている。しかしながら、上記構成では、絶縁部材をサイド部材に取り付けるための部品（締結部材）が必要であるため、部品点数が増加し、構成が複雑になっている。上記構成では、絶縁部材のサイド部材への取付作業の際に、締結部材による締結作業を行う必要があり、当該取付作業も複雑になる。このため、絶縁部材を蓄電素子に対して容易に固定できる構成が望まれる。 In the conventional power storage device described above, there are cases where an insulating member such as a busbar holder is arranged at a position facing the power storage element and the insulating member is fixed to the power storage element. In Patent Document 1, an insulating member (busbar cover) is arranged at a position facing the storage element, and the insulating member is fastened to the side member with a fastening member (screw) to be fixed to the storage element. However, the above configuration requires a part (fastening member) for attaching the insulating member to the side member, which increases the number of parts and complicates the configuration. In the above configuration, when the insulating member is attached to the side member, it is necessary to perform the fastening operation using the fastening member, which complicates the attachment operation. For this reason, a configuration is desired in which the insulating member can be easily fixed to the storage element.
　本発明は、本願発明者が上記課題に新たに着目することによってなされたものであり、蓄電素子に対向して配置される絶縁部材を蓄電素子に対して容易に固定できる蓄電装置を提供することを目的とする。 SUMMARY OF THE INVENTION The present invention has been made by the inventors of the present invention, who have newly paid attention to the above problems, and provides an electric storage device in which an insulating member arranged to face an electric storage element can be easily fixed to the electric storage element. With the goal.
　本発明の一態様に係る蓄電装置は、蓄電素子と、第一方向において前記蓄電素子を挟む一対のエンド部材と、前記第一方向と交差する第二方向において前記蓄電素子に対向して配置され、前記一対のエンド部材を繋ぐサイド部材と、前記第一方向及び前記第二方向と交差する第三方向において前記蓄電素子に対向して配置される絶縁部材と、を備え、前記絶縁部材及び前記サイド部材の一方は、前記絶縁部材及び前記サイド部材の他方に向けて突出する突出部を有し、前記絶縁部材及び前記サイド部材の前記他方は、前記突出部が挿入される開口部または凹部を有し、前記突出部が前記開口部または前記凹部に挿入されることで、前記絶縁部材が前記サイド部材に取り付けられる。 A power storage device according to an aspect of the present invention includes a power storage element, a pair of end members sandwiching the power storage element in a first direction, and facing the power storage element in a second direction intersecting the first direction. , a side member connecting the pair of end members; and an insulating member arranged to face the storage element in a third direction intersecting the first direction and the second direction, wherein the insulating member and the One of the side members has a protrusion projecting toward the other of the insulating member and the side member, and the other of the insulating member and the side member has an opening or a recess into which the protrusion is inserted. The insulating member is attached to the side member by inserting the protrusion into the opening or the recess.
　本発明は、このような蓄電装置として実現できるだけでなく、サイド部材と絶縁部材との組み合わせとしても実現できる。 The present invention can be realized not only as such a power storage device, but also as a combination of a side member and an insulating member.
　本発明における蓄電装置によれば、蓄電素子に対向して配置される絶縁部材を蓄電素子に対して容易に固定できる。 According to the power storage device of the present invention, the insulating member arranged to face the power storage element can be easily fixed to the power storage element.
図１は、実施の形態に係る蓄電装置の外観を示す斜視図である。FIG. 1 is a perspective view showing the appearance of a power storage device according to an embodiment. 図２は、実施の形態に係る蓄電装置を分解した場合の各構成要素を示す分解斜視図である。FIG. 2 is an exploded perspective view showing each component when the power storage device according to the embodiment is exploded. 図３は、実施の形態に係る蓄電素子の構成を示す斜視図である。FIG. 3 is a perspective view showing the structure of the storage device according to the embodiment. 図４は、実施の形態に係るサイド部材の構成を示す斜視図である。FIG. 4 is a perspective view showing the configuration of the side member according to the embodiment. 図５は、実施の形態に係る絶縁部材の構成を示す斜視図、側面図及び断面図である。5A and 5B are a perspective view, a side view, and a cross-sectional view showing the configuration of the insulating member according to the embodiment. 図６は、実施の形態に係る絶縁部材がサイド部材に取り付けられた状態での構成を示す斜視図及び断面図である。6A and 6B are a perspective view and a cross-sectional view showing the configuration in which the insulating member according to the embodiment is attached to the side member. 図７は、実施の形態に係る絶縁部材がサイド部材に取り付けられる構成を示す斜視図である。FIG. 7 is a perspective view showing a configuration in which an insulating member according to the embodiment is attached to side members. 図８Ａは、実施の形態の変形例に係る絶縁部材がサイド部材に取り付けられた状態での構成を示す断面図である。8A is a cross-sectional view showing a configuration in which an insulating member according to a modification of the embodiment is attached to a side member; FIG. 図８Ｂは、実施の形態の変形例に係る絶縁部材がサイド部材に取り付けられた状態での構成を示す断面図である。FIG. 8B is a cross-sectional view showing a configuration in which an insulating member according to a modification of the embodiment is attached to a side member; 図８Ｃは、実施の形態の変形例に係る絶縁部材がサイド部材に取り付けられた状態での構成を示す断面図である。FIG. 8C is a cross-sectional view showing a configuration in which the insulating member according to the modified example of the embodiment is attached to the side member.
　（１）本発明の一態様に係る蓄電装置は、蓄電素子と、第一方向において前記蓄電素子を挟む一対のエンド部材と、前記第一方向と交差する第二方向において前記蓄電素子に対向して配置され、前記一対のエンド部材を繋ぐサイド部材と、前記第一方向及び前記第二方向と交差する第三方向において前記蓄電素子に対向して配置される絶縁部材と、を備え、前記絶縁部材及び前記サイド部材の一方は、前記絶縁部材及び前記サイド部材の他方に向けて突出する突出部を有し、前記絶縁部材及び前記サイド部材の前記他方は、前記突出部が挿入される開口部または凹部を有し、前記突出部が前記開口部または前記凹部に挿入されることで、前記絶縁部材が前記サイド部材に取り付けられる。 (1) A power storage device according to an aspect of the present invention includes a power storage element, a pair of end members sandwiching the power storage element in a first direction, and facing the power storage element in a second direction intersecting the first direction. a side member that connects the pair of end members; One of the member and the side member has a protrusion projecting toward the other of the insulating member and the side member, and the other of the insulating member and the side member has an opening into which the protrusion is inserted. Alternatively, a recess is provided, and the insulating member is attached to the side member by inserting the projecting portion into the opening or the recess.
　これによれば、絶縁部材及びサイド部材の一方の突出部が、他方の開口部または凹部に挿入される構成とすることで、絶縁部材がサイド部材に容易に取り付けられる。これにより、絶縁部材が、蓄電素子と対向する方向である第三方向に移動するのが規制された状態でサイド部材に取り付けられるため、絶縁部材が蓄電素子に対して移動するのが抑制される。 According to this, the insulating member can be easily attached to the side member by adopting a configuration in which the projecting portion of one of the insulating member and the side member is inserted into the opening or recess of the other. As a result, the insulating member is attached to the side member in a state in which movement in the third direction, which is the direction facing the electric storage element, is restricted, so that the insulating member is restrained from moving with respect to the electric storage element. .
　（２）上記（１）に記載の蓄電装置において、前記絶縁部材及び前記サイド部材の前記一方は、前記絶縁部材であり、前記突出部は、前記第二方向において前記サイド部材に向けて突出して配置されてもよい。 (2) In the power storage device according to (1) above, the one of the insulating member and the side member is the insulating member, and the protruding portion protrudes toward the side member in the second direction. may be placed.
　絶縁部材は、一般的に樹脂等の加工しやすい部材で形成できるため、絶縁部材に、第二方向に突出する突出部を形成することで、突出部を容易に形成できる。これにより、絶縁部材をサイド部材に取り付ける構成を容易に形成できる。 Since the insulating member can generally be formed of a material such as resin that is easy to process, the projecting portion can be easily formed by forming the projecting portion projecting in the second direction on the insulating member. This makes it possible to easily form a structure for attaching the insulating member to the side member.
　（３）上記（１）または（２）に記載の蓄電装置において、前記絶縁部材及び前記サイド部材の前記一方は、複数の前記突出部を有し、複数の前記突出部が１つの前記開口部または前記凹部に挿入されることで、前記絶縁部材が前記サイド部材に取り付けられてもよい。 (3) In the power storage device described in (1) or (2) above, the one of the insulating member and the side member has a plurality of protrusions, and the plurality of protrusions constitutes one opening. Alternatively, the insulating member may be attached to the side member by being inserted into the recess.
　これによれば、絶縁部材及びサイド部材の一方が有する複数の突出部が、他方に形成された１つの開口部または凹部に挿入される構成とすることで、複数の突出部が独立して変形して１つの開口部または凹部に挿入されるため、突出部を開口部または凹部に容易に挿入できる。 According to this configuration, the plurality of protrusions of one of the insulating member and the side member is inserted into one opening or recess formed in the other, so that the plurality of protrusions can be deformed independently. The protrusion can be easily inserted into the opening or recess because the projection is inserted into one opening or recess as a single contact.
　（４）上記（３）に記載の蓄電装置において、複数の前記突出部は、前記第一方向において、間隔を空けて並んで配置され、複数の前記突出部が、前記第一方向に延びる前記開口部または凹部に挿入されることで、前記絶縁部材が前記サイド部材に取り付けられてもよい。 (4) In the power storage device described in (3) above, the plurality of protrusions are arranged side by side with a gap in the first direction, and the plurality of protrusions extend in the first direction. The insulating member may be attached to the side member by being inserted into the opening or recess.
　これによれば、絶縁部材及びサイド部材の一方が有する複数の突出部が第一方向に並んで配置されて、他方の、第一方向に延びる開口部または凹部に挿入されることで、第一方向に亘って、絶縁部材をサイド部材に取り付けることができる。複数の突出部が間隔を空けて並ぶことで、複数の突出部が開口部または凹部に挿入される際に、突出部同士が互いに干渉したり、突出部と他の部材（スペーサ等）とが干渉するのを抑制できる。 According to this, the plurality of projecting portions of one of the insulating member and the side member are arranged side by side in the first direction, and are inserted into the openings or recesses of the other member extending in the first direction. An insulating member can be attached to the side member across the direction. When a plurality of protrusions are lined up at intervals, when the plurality of protrusions are inserted into an opening or a recess, the protrusions may interfere with each other, or the protrusions and other members (spacers, etc.) may interfere with each other. Interference can be suppressed.
　（５）上記（４）に記載の蓄電装置において、前記第一方向において前記蓄電素子と並んで配置されるスペーサをさらに備え、前記スペーサは、複数の前記突出部の間の空間に挿入されて配置されてもよい。 (5) The power storage device according to (4) above further includes a spacer arranged in parallel with the power storage element in the first direction, wherein the spacer is inserted into a space between the plurality of protrusions. may be placed.
　これによれば、絶縁部材及びサイド部材の一方が有する複数の突出部の間の空間にスペーサが挿入される構成とすることで、第二方向においてスペーサの長さを長くでき、絶縁性を向上できる。スペーサによって、突出部の位置決めを行うこともできる。これにより、絶縁性を確保しつつ、絶縁部材をサイド部材に容易に取り付けることができる。 According to this configuration, the spacer is inserted into the space between the plurality of protrusions of one of the insulating member and the side member, so that the length of the spacer can be increased in the second direction, and the insulation can be improved. can. Spacers may also provide positioning of the protrusions. This makes it possible to easily attach the insulating member to the side member while ensuring insulation.
　以下、図面を参照しながら、本発明の実施の形態（その変形例も含む）に係る蓄電装置について説明する。以下で説明する実施の形態は、いずれも包括的または具体的な例を示すものである。以下の実施の形態で示される数値、形状、材料、構成要素、構成要素の配置位置及び接続形態、製造工程、製造工程の順序等は、一例であり、本発明を限定する主旨ではない。各図において、寸法等は厳密に図示したものではない。各図において、同一または同様な構成要素については同じ符号を付している。 Power storage devices according to embodiments of the present invention (including modifications thereof) will be described below with reference to the drawings. All of the embodiments described below are generic or specific examples. Numerical values, shapes, materials, components, arrangement positions and connection forms of components, manufacturing processes, order of manufacturing processes, and the like shown in the following embodiments are examples, and are not intended to limit the present invention. In each drawing, dimensions and the like are not strictly illustrated. In each figure, the same reference numerals are given to the same or similar components.
　以下の説明及び図面中において、複数の蓄電素子の配列方向、蓄電素子の容器の長側面の対向方向、蓄電素子とスペーサとの並び方向、または、一対のエンド部材の並び方向を、Ｘ軸方向と定義する。１つの蓄電素子における一対（正極側及び負極側）の電極端子の並び方向、蓄電素子の容器の短側面の対向方向、または、一対のサイド部材の並び方向を、Ｙ軸方向と定義する。蓄電装置の外装体本体と外装体蓋体との並び方向、蓄電素子の容器本体と容器蓋体との並び方向、蓄電素子とバスバーとの並び方向、蓄電素子と絶縁部材（バスバーホルダ）との並び方向、または、上下方向を、Ｚ軸方向と定義する。これらＸ軸方向、Ｙ軸方向及びＺ軸方向は、互いに交差（本実施の形態では直交）する方向である。使用態様によってはＺ軸方向が上下方向にならない場合も考えられるが、以下では説明の便宜のため、Ｚ軸方向を上下方向として説明する。 In the following description and drawings, the direction in which a plurality of energy storage elements are arranged, the direction in which the long sides of the container of the energy storage elements face each other, the direction in which the energy storage elements and spacers are arranged, or the direction in which a pair of end members are arranged is defined as the X-axis direction. defined as The Y-axis direction is defined as the direction in which a pair of electrode terminals (positive electrode side and negative electrode side) in one energy storage element are aligned, the direction in which the short sides of the container of the energy storage element face each other, or the direction in which a pair of side members are aligned. The arrangement direction of the main body and the cover body of the power storage device, the arrangement direction of the container body and the container cover of the power storage device, the direction of arrangement of the power storage device and the bus bar, and the alignment direction of the power storage device and the insulating member (bus bar holder). The alignment direction or 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). Depending on the mode of use, 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.
　以下の説明において、Ｘ軸プラス方向とは、Ｘ軸の矢印方向を示し、Ｘ軸マイナス方向とは、Ｘ軸プラス方向とは反対方向を示す。単にＸ軸方向という場合は、Ｘ軸プラス方向及びＸ軸マイナス方向の双方向またはいずれか一方の方向を示す。Ｙ軸方向及びＺ軸方向についても同様である。以下では、Ｘ軸方向を第一方向とも呼び、Ｙ軸方向を第二方向とも呼び、Ｚ軸方向を第三方向とも呼ぶ場合がある。平行及び直交などの、相対的な方向または姿勢を示す表現は、厳密には、その方向または姿勢ではない場合も含む。例えば、２つの方向が平行であるとは、当該２つの方向が完全に平行であることを意味するだけでなく、実質的に平行であること、すなわち、例えば数％程度の差異を含むことも意味する。以下の説明において、「絶縁」と表現する場合、「電気的な絶縁」を意味する。 In the following description, the positive direction of the X-axis indicates the direction of the arrow on the X-axis, and the negative direction of the X-axis indicates the direction opposite to the positive direction of the X-axis. When simply referred to as the X-axis direction, it indicates either or both of the X-axis plus direction and the X-axis minus direction. The same applies to the Y-axis direction and the Z-axis direction. Hereinafter, the X-axis direction may also be referred to as the first direction, the Y-axis direction may also be referred to as the second direction, and the Z-axis direction may also be referred to as the third direction. Expressions indicating relative directions or orientations, such as parallel and orthogonal, also include cases where the directions or orientations are not strictly speaking. For example, two directions being parallel not only means that the two directions are completely parallel, but also being substantially parallel, that is, including a difference of about several percent, for example. means. In the following description, the expression "insulation" means "electrical insulation".
　（実施の形態）
　［１　蓄電装置１０の全般的な説明］
　まず、本実施の形態における蓄電装置１０の全般的な説明を行う。図１は、本実施の形態に係る蓄電装置１０の外観を示す斜視図である。図２は、本実施の形態に係る蓄電装置１０を分解した場合の各構成要素を示す分解斜視図である。 (Embodiment)
[1 General description of power storage device 10]
First, a general description of power storage device 10 in the present embodiment will be given. FIG. 1 is a perspective view showing the appearance of power storage device 10 according to the present embodiment. FIG. 2 is an exploded perspective view showing each component when power storage device 10 according to the present embodiment is exploded.
　蓄電装置１０は、外部からの電気を充電し、また外部へ電気を放電できる装置であり、本実施の形態では、略直方体形状を有している。例えば、蓄電装置１０は、電力貯蔵用途または電源用途等に使用される電池モジュール（組電池）である。具体的には、蓄電装置１０は、自動車、自動二輪車、ウォータークラフト、船舶、スノーモービル、農業機械、建設機械、または、電気鉄道用の鉄道車両等の移動体の駆動用またはエンジン始動用等のバッテリ等として用いられる。上記の自動車としては、電気自動車（ＥＶ）、ハイブリッド電気自動車（ＨＥＶ）、プラグインハイブリッド電気自動車（ＰＨＥＶ）、及び、化石燃料（ガソリン、軽油、液化天然ガス等）自動車が例示される。上記の電気鉄道用の鉄道車両としては、電車、モノレール、リニアモーターカー、並びに、ディーゼル機関及び電気モーターの両方を備えるハイブリッド電車が例示される。蓄電装置１０は、家庭用または事業用等に使用される定置用のバッテリ等としても用いることができる。 The power storage device 10 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. For example, the power storage device 10 is a battery module (assembled battery) used for power storage or power supply. Specifically, the power storage device 10 is used for driving mobile bodies such as automobiles, motorcycles, water crafts, ships, snowmobiles, agricultural machinery, construction machinery, or railroad vehicles for electric railways, or for starting engines. Used as a battery or the like. Examples of 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 10 can also be used as a stationary battery or the like for home or business use.
　図１に示すように、蓄電装置１０は、外装体１００を備えている。図２に示すように、外装体１００の内方には、複数の蓄電素子２００、複数のスペーサ３００、一対のエンド部材４００、一対のサイド部材５００、絶縁部材６００、及び、複数のバスバー７００等が収容されている。蓄電装置１０は、上記の構成要素の他、基板、リレー、ヒューズ、シャント抵抗及びコネクタ等の電気部品、蓄電素子２００から排出されるガスを外装体１００の外方へ排気するための排気部等を備えていてもよい。 As shown in FIG. 1 , the power storage device 10 has an exterior body 100 . As shown in FIG. 2, a plurality of storage elements 200, a plurality of spacers 300, a pair of end members 400, a pair of side members 500, an insulating member 600, a plurality of bus bars 700, and the like are provided inside the exterior body 100. is accommodated. In addition to the components described above, the power storage device 10 includes electrical components such as a substrate, relays, fuses, shunt resistors, and connectors, an exhaust section for exhausting gas discharged from the power storage element 200 to the outside of the exterior body 100, and the like. may be provided.
　外装体１００は、蓄電装置１０の筐体（外殻）を構成する箱形（略直方体形状）の容器（モジュールケース）である。外装体１００は、複数の蓄電素子２００等の外方に配置され、当該複数の蓄電素子２００等を所定の位置で固定し、衝撃等から保護する。外装体１００は、例えば、ポリカーボネート（ＰＣ）、ポリプロピレン（ＰＰ）、ポリエチレン（ＰＥ）、ポリスチレン（ＰＳ）、ポリフェニレンサルファイド樹脂（ＰＰＳ）、ポリフェニレンエーテル（ＰＰＥ（変性ＰＰＥを含む））、ポリエチレンテレフタラート（ＰＥＴ）、ポリブチレンテレフタレート（ＰＢＴ）、ポリエーテルエーテルケトン（ＰＥＥＫ）、テトラフルオロエチレン・パーフルオロアルキルビニルエーテル（ＰＦＡ）、ポリテトラフルオロエチレン（ＰＴＦＥ）、ポリエーテルサルフォン（ＰＥＳ）、ポリアミド（ＰＡ）、ＡＢＳ樹脂、若しくは、それらの複合材料等の絶縁部材、または、絶縁塗装をした金属等により形成されている。外装体１００は、これにより、蓄電素子２００等が外部の金属部材等に接触することを回避する。蓄電素子２００等の絶縁性が保たれる構成であれば、外装体１００は、金属等の導電部材で形成されていてもよい。 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 10 . The exterior body 100 is arranged outside the plurality of power storage elements 200 and the like, fixes the plurality of power storage elements 200 and the like at predetermined positions, and protects them from impacts and the like. The exterior body 100 is made of, for example, 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, or an insulating member such as a composite material thereof, or a metal coated with an insulating coating. The exterior body 100 thereby prevents the power storage element 200 and the like from coming into contact with an external metal member or the like. The exterior body 100 may be made of a conductive member such as metal as long as the insulation of the power storage element 200 and the like is maintained.
　外装体１００は、外装体１００の本体を構成する外装体本体１１０と、外装体１００の蓋体を構成する外装体蓋体１２０と、を有している。外装体本体１１０は、開口が形成された有底矩形筒状のハウジング（筐体）であり、蓄電素子２００等を収容する。外装体蓋体１２０は、外装体本体１１０の開口を閉塞する扁平な矩形状の部材である。外装体蓋体１２０は、外装体本体１１０と、接着剤、ヒートシールまたは超音波溶着等によって接合される。これにより、外装体１００は、内部が密閉（密封）された構造となっている。外装体蓋体１２０には、一対（正極側及び負極側）の外部端子１２１が設けられている。蓄電装置１０は、この一対の外部端子１２１を介して、外部からの電気を充電し、また外部へ電気を放電する。 The exterior body 100 has an exterior body main body 110 that constitutes the main body of the exterior body 100 and an exterior body lid 120 that constitutes the lid of the exterior body 100 . The exterior body main body 110 is a bottomed rectangular cylindrical housing (casing) having an opening, and accommodates the power storage element 200 and the like. The exterior cover 120 is a flat rectangular member that closes the opening of the exterior main body 110 . The exterior body lid 120 is joined to the exterior body main body 110 by an adhesive, heat sealing, ultrasonic welding, or the like. As a result, the exterior body 100 has a structure in which the inside is sealed (sealed). A pair of external terminals 121 (on the positive electrode side and the negative electrode side) are provided on the outer cover body 120 . Power storage device 10 charges electricity from the outside and discharges electricity to the outside through the pair of external terminals 121 .
　蓄電素子２００は、電気を充電し、また、電気を放電できる二次電池（単電池）であり、具体的には、リチウムイオン二次電池等の非水電解質二次電池である。蓄電素子２００は、扁平な直方体形状（角形）を有しており、本実施の形態では、８個の蓄電素子２００がＸ軸方向に並んで配列されている。蓄電素子２００の大きさ、形状、及び、配列される蓄電素子２００の個数等は限定されず、例えば１つの蓄電素子２００しか配置されていなくてもよい。蓄電素子２００は、非水電解質二次電池には限定されず、非水電解質二次電池以外の二次電池であってもよいし、キャパシタであってもよい。蓄電素子２００は、二次電池ではなく、使用者が充電をしなくても蓄えられている電気を使用できる一次電池であってもよい。蓄電素子２００は、パウチタイプの蓄電素子であってもよい。蓄電素子２００の構成の詳細な説明については、後述する。 The power storage element 200 is a secondary battery (single battery) capable of charging and discharging electricity, specifically a non-aqueous electrolyte secondary battery such as a lithium ion secondary battery. Energy storage element 200 has a flattened rectangular parallelepiped shape (square shape), and in the present embodiment, eight energy storage elements 200 are arranged side by side in the X-axis direction. The size and shape of the power storage element 200, the number of power storage elements 200 to be arranged, and the like are not limited, and for example, only one power storage element 200 may be arranged. 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 pouch-type storage element. A detailed description of the configuration of the storage element 200 will be given later.
　スペーサ３００は、Ｘ軸方向（第一方向）において蓄電素子２００の側方（Ｘ軸プラス方向またはＸ軸マイナス方向）に蓄電素子２００と並んで配置され、蓄電素子２００と他の部材とを絶縁する平板状かつ矩形状の部材である。スペーサ３００は、隣り合う２つの蓄電素子２００の間、及び、端部の蓄電素子２００とエンド部材４００との間に配置され、当該２つの蓄電素子２００の間、及び、当該端部の蓄電素子２００とエンド部材４００との間を絶縁する。本実施の形態では、８個の蓄電素子２００に対応して９枚のスペーサ３００が配置されているが、スペーサ３００の配置位置及び個数等は、特に限定されない。スペーサ３００は、上記の外装体１００に使用可能ないずれかの樹脂材料等の絶縁性を有する部材、または、マイカ片を集積し、結合することで構成されるダンマ材等の断熱性を有する部材等で形成されている。 Spacer 300 is arranged side by side with power storage element 200 (X-axis plus direction or X-axis minus direction) in the X-axis direction (first direction), side by side with power storage element 200, and insulates power storage element 200 from other members. It is a flat plate-shaped and rectangular member. The spacers 300 are arranged between two adjacent energy storage elements 200 and between the end energy storage element 200 and the end member 400, and are arranged between the two energy storage elements 200 and the end energy storage elements. 200 and the end member 400 are insulated. In the present embodiment, nine spacers 300 are arranged corresponding to eight power storage elements 200, but the arrangement position and number of spacers 300 are not particularly limited. The spacer 300 is a member having insulating properties such as any resin material that can be used for the exterior body 100, or a member having heat insulating properties such as a damper material formed by accumulating and bonding mica pieces. etc.
　エンド部材４００及びサイド部材５００は、複数の蓄電素子２００の並び方向（Ｘ軸方向）において、蓄電素子２００を外方から圧迫（拘束）する拘束部材である。エンド部材４００及びサイド部材５００は、複数の蓄電素子２００を当該並び方向の両側から挟み込むことで、複数の蓄電素子２００に含まれるそれぞれの蓄電素子２００を当該並び方向の両側から圧迫（拘束）する。エンド部材４００及びサイド部材５００は、強度確保の観点等から、鋼またはステンレス等の金属製の部材で形成されているが、その材質は特に限定されず、強度の高い絶縁性の部材で形成されていてもよいし、金属製の部材に絶縁処理が施されていてもよい。 The end member 400 and the side member 500 are restraining members that externally press (restrain) the storage elements 200 in the direction in which the plurality of storage elements 200 are arranged (X-axis direction). The end members 400 and the side members 500 sandwich the plurality of power storage elements 200 from both sides in the alignment direction, thereby pressing (restraining) each power storage element 200 included in the plurality of power storage elements 200 from both sides in the alignment direction. . The end member 400 and the side member 500 are formed of a metal member such as steel or stainless steel from the viewpoint of ensuring strength, but the material is not particularly limited, and the end member 400 and the side member 500 are formed of a high-strength insulating member. Alternatively, a metal member may be subjected to an insulation treatment.
　エンド部材４００は、複数の蓄電素子２００及び複数のスペーサ３００のＸ軸方向（第一方向）の両側に配置され、当該複数の蓄電素子２００等をこれらの並び方向（Ｘ軸方向）の両側から挟み込んで保持する、板状かつ矩形状の拘束部材（エンドプレート）である。一対のエンド部材４００は、Ｘ軸方向において複数の蓄電素子２００及び複数のスペーサ３００を挟む位置に配置されて、これらを拘束する。エンド部材４００は、板状ではなく、扁平なブロック状の部材等でもよい。 The end members 400 are arranged on both sides of the plurality of energy storage elements 200 and the plurality of spacers 300 in the X-axis direction (first direction), so that the plurality of energy storage elements 200, etc. It is a plate-like rectangular restraining member (end plate) that is sandwiched and held. The pair of end members 400 are arranged at positions sandwiching the plurality of energy storage elements 200 and the plurality of spacers 300 in the X-axis direction to restrain them. The end member 400 may be a flat block-shaped member or the like instead of a plate-shaped member.
　サイド部材５００は、複数の蓄電素子２００及び複数のスペーサ３００のＹ軸方向（第一方向と交差する第二方向）の両側に、Ｙ軸方向において当該複数の蓄電素子２００等に対向して配置される、板状かつ長尺状の拘束部材（サイドプレート）である。一対のサイド部材５００は、両端が一対のエンド部材４００に取り付けられて、一対のエンド部材４００を繋ぐことで、複数の蓄電素子２００及び複数のスペーサ３００を拘束する。つまり、サイド部材５００は、複数の蓄電素子２００及び複数のスペーサ３００を跨ぐようにＸ軸方向に延び、当該複数の蓄電素子２００等に対してこれらの並び方向（Ｘ軸方向）における拘束力を付与する。サイド部材５００は、板状ではなく、長尺な棒状の部材等でもよい。 The side members 500 are arranged on both sides of the plurality of energy storage elements 200 and the plurality of spacers 300 in the Y-axis direction (the second direction that intersects with the first direction) so as to face the plurality of energy storage elements 200 and the like in the Y-axis direction. It is a plate-shaped and elongated restraining member (side plate). Both ends of the pair of side members 500 are attached to the pair of end members 400 , and by connecting the pair of end members 400 , the plurality of power storage elements 200 and the plurality of spacers 300 are bound. In other words, the side member 500 extends in the X-axis direction so as to straddle the plurality of energy storage elements 200 and the plurality of spacers 300, and exerts a restraining force in the arrangement direction (X-axis direction) on the plurality of energy storage elements 200 and the like. Give. The side member 500 may be a long rod-shaped member or the like instead of a plate-shaped member.
　一対のサイド部材５００は、それぞれが、Ｘ軸方向両端部において、一対のエンド部材４００のＹ軸方向端部に取り付けられる。これにより、一対のサイド部材５００は、一対のエンド部材４００とともに、当該複数の蓄電素子２００等をＸ軸方向の両側及びＹ軸方向の両側から挟み込んで拘束する。具体的には、サイド部材５００は、Ｚ軸方向に並ぶ複数（本実施の形態では、２つ）の接続部材５００ａによって、エンド部材４００の接続部材４００ａに接続（接合）される。本実施の形態では、接続部材４００ａはボルト（ネジ）であり、接続部材５００ａはナットであり、接続部材４００ａの雄ネジ部と接続部材５００ａの雌ネジ部とが螺合することにより、エンド部材４００とサイド部材５００とが締結される。エンド部材４００とサイド部材５００との接続（接合）は、ボルト及びナットによる固定には限定されず、溶接または接着等により接合されてもよい。サイド部材５００の構成の詳細な説明については、後述する。 The pair of side members 500 are attached to the Y-axis direction ends of the pair of end members 400 at both ends in the X-axis direction. Accordingly, the pair of side members 500 and the pair of end members 400 sandwich and constrain the plurality of power storage elements 200 and the like from both sides in the X-axis direction and both sides in the Y-axis direction. Specifically, the side member 500 is connected (joined) to the connecting member 400a of the end member 400 by a plurality of (two in this embodiment) connecting members 500a arranged in the Z-axis direction. In the present embodiment, connecting member 400a is a bolt (screw), and connecting member 500a is a nut. 400 and the side member 500 are fastened. The connection (joining) between the end member 400 and the side member 500 is not limited to fixing with bolts and nuts, and may be joined by welding, adhesion, or the like. A detailed description of the configuration of the side member 500 will be given later.
　絶縁部材６００は、バスバー７００と他の部材との絶縁、及び、バスバー７００の位置規制等を行う平板状かつ矩形状の部材（バスバーホルダ、バスバーフレームまたはバスバープレートとも言う）である。絶縁部材６００は、Ｚ軸方向（第一方向及び第二方向と交差する第三方向）において、蓄電素子２００に対向して配置される。具体的には、絶縁部材６００は、複数の蓄電素子２００のＺ軸プラス方向に配置されて、複数の蓄電素子２００上に載置される。そして、絶縁部材６００が複数の蓄電素子２００に対して位置決めされ、かつ、バスバー７００が絶縁部材６００に対して位置決めされることで、バスバー７００が複数の蓄電素子２００に対して位置決めされる。絶縁部材６００は、例えば、上記の外装体１００に使用可能ないずれかの樹脂材料等の絶縁性を有する部材等で形成されている。絶縁部材６００の構成の詳細な説明については、後述する。 The insulating member 600 is a flat and rectangular member (also called a busbar holder, a busbar frame, or a busbar plate) that insulates the busbar 700 from other members and regulates the position of the busbar 700 . The insulating member 600 is arranged to face the power storage element 200 in the Z-axis direction (the third direction intersecting the first direction and the second direction). Specifically, the insulating member 600 is arranged in the Z-axis positive direction of the plurality of power storage elements 200 and placed on the plurality of power storage elements 200 . Insulating member 600 is positioned with respect to power storage elements 200 and busbar 700 is positioned with respect to insulating member 600 , whereby busbar 700 is positioned with respect to power storage elements 200 . The insulating member 600 is formed of, for example, a member having insulating properties such as any resin material that can be used for the exterior body 100 described above. A detailed description of the configuration of the insulating member 600 will be given later.
　バスバー７００は、蓄電素子２００に接続される板状の部材である。バスバー７００は、複数の蓄電素子２００の上方に配置され、複数の蓄電素子２００が有する電極端子２４０（図３等参照）に接続（接合）される。具体的には、バスバー７００は、複数の蓄電素子２００の電極端子２４０同士を接続し、かつ、端部の蓄電素子２００の電極端子２４０と外部端子１２１とを電気的に接続する。本実施の形態では、バスバー７００は、蓄電素子２００を２個ずつ並列に接続して４セットの蓄電素子群を構成し、当該４セットの蓄電素子群を直列に接続する。バスバー７００の接続形態は特に限定されず、複数の蓄電素子２００をどのような組み合わせで直列に接続し、また、並列に接続してもよいし、全ての蓄電素子２００を直列または並列に接続してもよい。バスバー７００と電極端子２４０とは、溶接によって接続（接合）されるが、その接続形態は特に限定されない。バスバー７００は、アルミニウム、アルミニウム合金、銅、銅合金、ニッケル等の金属製の導電部材若しくはそれらの組み合わせ、または、金属以外の導電性の部材等で形成されている。 The bus bar 700 is a plate-shaped member connected to the power storage element 200 . The bus bar 700 is arranged above the plurality of power storage elements 200 and connected (joined) to the electrode terminals 240 (see FIG. 3 etc.) of the plurality of power storage elements 200 . Specifically, the bus bar 700 connects the electrode terminals 240 of the plurality of storage elements 200 to each other and electrically connects the electrode terminals 240 of the storage elements 200 at the ends to the external terminals 121 . In the present embodiment, bus bar 700 connects two power storage elements 200 in parallel to form four power storage element groups, and connects the four power storage element groups in series. The connection form of the bus bar 700 is not particularly limited, and a plurality of power storage elements 200 may be connected in series or in parallel in any combination, or all power storage elements 200 may be connected in series or in parallel. may Bus bar 700 and electrode terminal 240 are connected (joined) by welding, but the form of connection is not particularly limited. Bus bar 700 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.
　［２　蓄電素子２００の説明］
　次に、蓄電素子２００の構成について、詳細に説明する。図３は、本実施の形態に係る蓄電素子２００の構成を示す斜視図である。具体的には、図３は、図２に示した複数の蓄電素子２００のうちの１つの蓄電素子２００の外観を拡大して示している。当該複数の蓄電素子２００は、全て同様の構成を有しているため、以下では、１つの蓄電素子２００の構成について詳細に説明する。 [2 Explanation of storage element 200]
Next, the configuration of the storage element 200 will be described in detail. FIG. 3 is a perspective view showing the structure of the storage element 200 according to this embodiment. Specifically, FIG. 3 shows an enlarged appearance of one power storage element 200 out of the plurality of power storage elements 200 shown in FIG. Since the plurality of power storage elements 200 all have the same configuration, the configuration of one power storage element 200 will be described in detail below.
　図３に示すように、蓄電素子２００は、容器２１０と、一対（正極側及び負極側）の電極端子２４０と、上部ガスケット２５０と、を備えている。容器２１０の内方には、下部ガスケット、電極体、一対（正極側及び負極側）の集電体、及び、電解液（非水電解質）等が収容されているが、これらの図示は省略する。当該電解液としては、蓄電素子２００の性能を損なうものでなければその種類に特に制限はなく、様々なものを選択することができる。 As shown in FIG. 3 , the electric storage element 200 includes a container 210 , a pair of electrode terminals 240 (positive electrode side and negative electrode side), and an upper gasket 250 . Inside the container 210, a lower gasket, an electrode body, a pair of current collectors (positive electrode side and negative electrode side), an electrolytic solution (non-aqueous electrolyte), etc. are accommodated, but illustration of these is omitted. . As the electrolytic solution, the type 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.
　蓄電素子２００は、上記の構成要素の他、電極体の側方または下方等に配置されるスペーサ、及び、電極体等を包み込む絶縁フィルム等を有していてもよい。さらに、容器２１０の周囲には、容器２１０の外面を覆う絶縁フィルム（シュリンクチューブ等）が配置されていてもよい。当該絶縁フィルムの材質は、蓄電素子２００に必要な絶縁性を確保できるものであれば特に限定されないが、外装体１００に使用可能ないずれかの絶縁性の樹脂、エポキシ樹脂、カプトン（登録商標）、テフロン（登録商標）、シリコン、ポリイソプレン、及びポリ塩化ビニル等を例示することができる。 In addition to the components described above, the electric storage element 200 may have spacers arranged on the side or below the electrode body, an insulating film that wraps the electrode body and the like, and the like. Furthermore, an insulating film (shrink tube or the like) covering the outer surface of the container 210 may be arranged around the container 210 . The material of the insulating film is not particularly limited as long as it can ensure the insulation required for the power storage element 200, but any insulating resin, epoxy resin, Kapton (registered trademark) that can be used for the exterior body 100 can be used. , Teflon (registered trademark), silicone, polyisoprene, and polyvinyl chloride.
　容器２１０は、開口が形成された容器本体２２０と、容器本体２２０の当該開口を閉塞する容器蓋体２３０と、を有する直方体形状（角形または箱形）のケースである。容器本体２２０は、容器２１０の本体部を構成する矩形筒状で底を備える部材であり、Ｚ軸プラス方向側に開口が形成されている。容器蓋体２３０は、容器２１０の蓋部を構成する矩形状の板状部材であり、容器本体２２０のＺ軸プラス方向にＹ軸方向に延びて配置されている。容器蓋体２３０には、容器２１０内方の圧力が過度に上昇した場合に当該圧力を開放するガス排出弁２３１、及び、容器２１０内方に電解液を注液するための注液部（図示せず）等が設けられている。容器２１０（容器本体２２０及び容器蓋体２３０）の材質は、特に限定されず、ステンレス鋼、アルミニウム、アルミニウム合金、鉄、メッキ鋼板など溶接可能（接合可能）な金属とすることができるが、樹脂を用いることもできる。 The container 210 is a rectangular parallelepiped (square or box-shaped) case having a container body 220 with an opening and a container lid 230 closing the opening of the container body 220 . The container main body 220 is a rectangular cylindrical member having a bottom that constitutes the main body of the container 210, and has an opening formed in the positive direction of the Z axis. The container lid 230 is a rectangular plate-like member that constitutes the lid of the container 210 and is arranged to extend in the Y-axis direction in the positive Z-axis direction of the container body 220 . The container lid 230 has a gas discharge valve 231 that releases the pressure inside the container 210 when the pressure inside the container 210 rises excessively, and an injection part (FIG. not shown), etc. are provided. The material of the container 210 (container main body 220 and container lid 230) is not particularly limited, and can be a weldable (joinable) metal such as stainless steel, aluminum, aluminum alloy, iron, or plated steel plate. can also be used.
　容器２１０は、電極体等を容器本体２２０の内方に収容後、容器本体２２０と容器蓋体２３０とが溶接等によって接合されることにより、内部が密閉（密封）される構造となっている。容器２１０は、Ｘ軸方向両側の側面に一対の長側面２１１を有し、Ｙ軸方向両側の側面に一対の短側面２１２を有し、Ｚ軸マイナス方向側に底面２１３を有している。長側面２１１は、容器２１０の長側面を形成する矩形状の平面部であり、隣り合うスペーサ３００とＸ軸方向において対向して配置される。長側面２１１は、短側面２１２及び底面２１３に隣接し、短側面２１２よりも面積が大きい。短側面２１２は、容器２１０の短側面を形成する矩形状の平面部であり、サイド部材５００とＹ軸方向において対向して配置される。短側面２１２は、長側面２１１及び底面２１３に隣接し、長側面２１１よりも面積が小さい。底面２１３は、容器２１０の底面を形成する矩形状の平面部であり、長側面２１１及び短側面２１２に隣接して配置される。 The container 210 has a structure in which the inside is sealed (sealed) by joining the container body 220 and the container cover 230 by welding or the like after the electrode body and the like are housed inside the container body 220 . . The container 210 has a pair of long side surfaces 211 on both side surfaces in the X-axis direction, a pair of short side surfaces 212 on both side surfaces in the Y-axis direction, and a bottom surface 213 on the Z-axis negative direction side. The long side surface 211 is a rectangular planar portion that forms the long side surface of the container 210 and is arranged to face the adjacent spacers 300 in the X-axis direction. Long side 211 is adjacent to short side 212 and bottom 213 and has a larger area than short side 212 . The short side surface 212 is a rectangular planar portion that forms the short side surface of the container 210 and is arranged to face the side member 500 in the Y-axis direction. Short side 212 is adjacent to long side 211 and bottom surface 213 and has a smaller area than long side 211 . The bottom surface 213 is a rectangular planar portion that forms the bottom surface of the container 210 and is arranged adjacent to the long side surface 211 and the short side surface 212 .
　電極端子２４０は、容器蓋体２３０に配置される蓄電素子２００の端子部材（正極端子及び負極端子）であり、集電体を介して、電極体の正極板及び負極板に電気的に接続されている。つまり、電極端子２４０は、電極体に蓄えられている電気を蓄電素子２００の外部空間に導出し、また、電極体に電気を蓄えるために蓄電素子２００の内部空間に電気を導入するための金属製の部材である。電極端子２４０は、アルミニウム、アルミニウム合金、銅、銅合金などで形成されている。 The electrode terminal 240 is a terminal member (a positive electrode terminal and a negative electrode terminal) of the storage element 200 arranged in the container lid 230, and is electrically connected to the positive electrode plate and the negative electrode plate of the electrode assembly via the current collector. ing. In other words, the electrode terminal 240 is made of metal for leading electricity stored in the electrode body to the external space of the storage element 200 and for introducing electricity into the internal space of the storage element 200 to store the electricity in the electrode body. It is a member made of The electrode terminal 240 is made of aluminum, aluminum alloy, copper, copper alloy, or the like.
　電極体は、正極板と負極板とセパレータとが積層されて形成された蓄電要素（発電要素）である。正極板は、アルミニウムまたはアルミニウム合金等の金属からなる集電箔である正極基材層上に正極活物質層が形成されたものである。負極板は、銅または銅合金等の金属からなる集電箔である負極基材層上に負極活物質層が形成されたものである。正極活物質層及び負極活物質層に用いられる活物質としては、リチウムイオンを吸蔵放出可能なものであれば、適宜公知の材料を使用できる。セパレータは、樹脂からなる微多孔性のシートまたは不織布等を用いることができる。本実施の形態では、電極体は、極板（正極板及び負極板）がＸ軸方向に積層されて形成されている。電極体は、極板（正極板及び負極板）が巻回されて形成された巻回型の電極体、複数の平板状の極板が積層されて形成された積層型（スタック型）の電極体、または、極板を蛇腹状に折り畳んだ蛇腹型の電極体等、どのような形態の電極体でもよい。 The electrode assembly 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. As 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. A microporous sheet made of resin, a non-woven fabric, or the like can be used as the separator. In the present embodiment, the electrode body is formed by stacking electrode plates (a positive electrode plate and a negative electrode plate) in the X-axis direction. The electrode body includes a wound electrode body formed by winding electrode plates (a positive electrode plate and a negative electrode plate), and a laminated (stacked) electrode formed by stacking a plurality of flat plate-shaped electrode plates. The electrode body may have any form, such as a body or a bellows-shaped electrode body in which an electrode plate is folded into a bellows shape.
　集電体は、電極端子２４０と電極体とに電気的に接続される導電性の部材（正極集電体及び負極集電体）である。正極集電体は、正極板の正極基材層と同様、アルミニウムまたはアルミニウム合金等で形成され、負極集電体は、負極板の負極基材層と同様、銅または銅合金等で形成されている。上部ガスケット２５０は、容器蓋体２３０と電極端子２４０との間に配置され、容器蓋体２３０と電極端子２４０との間を絶縁し、かつ封止するガスケットである。下部ガスケットは、容器蓋体２３０と集電体との間に配置され、容器蓋体２３０と集電体との間を絶縁し、かつ封止するガスケットである。上部ガスケット２５０及び下部ガスケットは、絶縁性を有していればどのような素材で形成されていてもよい。 The current collector is a conductive member (a positive electrode current collector and a negative electrode current collector) that is electrically connected to the electrode terminal 240 and the electrode body. The positive electrode current collector is made of aluminum, an aluminum alloy, or the like, like the positive electrode substrate layer of the positive electrode plate, and the negative electrode current collector, like the negative electrode substrate layer of the negative electrode plate, is made of copper, a copper alloy, or the like. there is The upper gasket 250 is a gasket that is arranged between the container lid 230 and the electrode terminal 240 to insulate and seal between the container lid 230 and the electrode terminal 240 . The lower gasket is a gasket that is arranged between the container lid 230 and the current collector to insulate and seal between the container lid 230 and the current collector. The upper gasket 250 and the lower gasket may be made of any material as long as it has insulating properties.
　［３　サイド部材５００及び絶縁部材６００の説明］
　次に、サイド部材５００及び絶縁部材６００の構成、及び、絶縁部材６００がサイド部材５００に取り付けられる構成について、詳細に説明する。図４は、本実施の形態に係るサイド部材５００の構成を示す斜視図である。図２に示した一対のサイド部材５００は同様の構成を有するため、図４では、一対のサイド部材５００のうちのＹ軸マイナス方向のサイド部材５００の外観を拡大して示している。図５は、本実施の形態に係る絶縁部材６００の構成を示す斜視図、側面図及び断面図である。具体的には、図５の（ａ）は、図２に示した絶縁部材６００の外観を拡大して示す斜視図であり、図５の（ｂ）は、絶縁部材６００のＹ軸マイナス方向端部の一部をさらに拡大して示す斜視図である。図５の（ｃ）は、図５の（ｂ）の構成を、側方（Ｙ軸マイナス方向）から見た場合の構成を示す側面図である。図５の（ｄ）は、図５の（ｂ）の構成を、Ｖｄ－Ｖｄ線を通りＹＺ平面に平行な面で切断した場合の断面を示す断面図である。 [3 Description of Side Member 500 and Insulating Member 600]
Next, the configuration of the side member 500 and the insulating member 600, and the configuration in which the insulating member 600 is attached to the side member 500 will be described in detail. FIG. 4 is a perspective view showing the configuration of the side member 500 according to this embodiment. Since the pair of side members 500 shown in FIG. 2 have the same configuration, FIG. 4 shows an enlarged view of the side member 500 of the pair of side members 500 in the minus Y-axis direction. 5A and 5B are a perspective view, a side view, and a cross-sectional view showing the configuration of the insulating member 600 according to this embodiment. Specifically, (a) of FIG. 5 is an enlarged perspective view showing the appearance of the insulating member 600 shown in FIG. 2, and (b) of FIG. It is a perspective view which further expands and shows a part of part. FIG. 5(c) is a side view showing the configuration of FIG. 5(b) viewed from the side (Y-axis negative direction). FIG. 5(d) is a cross-sectional view of the configuration of FIG. 5(b) taken along a plane parallel to the YZ plane through the line Vd--Vd.
　図６は、本実施の形態に係る絶縁部材６００がサイド部材５００に取り付けられた状態での構成を示す斜視図及び断面図である。具体的には、図６の（ａ）は、外装体１００の内部の構成を、説明の便宜のためバスバー７００を省略して示す（蓄電素子２００、スペーサ３００、エンド部材４００、サイド部材５００及び絶縁部材６００が組み付けられた状態での構成を示す）斜視図である。図６の（ｂ）は、図６の（ａ）に示した構成のＹ軸マイナス方向端部かつＺ軸プラス方向端部の一部を拡大して示す斜視図である。図６の（ｃ）は、図６の（ｂ）の構成を、ＶＩｃ－ＶＩｃ線を通りＹＺ平面に平行な面で切断した場合の断面を示す断面図である。 6A and 6B are a perspective view and a cross-sectional view showing the configuration in which the insulating member 600 according to the present embodiment is attached to the side member 500. FIG. Specifically, (a) of FIG. 6 shows the internal configuration of the exterior body 100 with the bus bar 700 omitted for convenience of explanation (the power storage element 200, the spacer 300, the end member 400, the side member 500, and the Fig. 11 is a perspective view showing a configuration in which an insulating member 600 is assembled; FIG. 6(b) is a perspective view showing an enlarged part of the Y-axis minus direction end and the Z-axis plus direction end of the configuration shown in FIG. 6(a). FIG. 6(c) is a cross-sectional view of the configuration of FIG. 6(b) taken along a plane parallel to the YZ plane passing through line VIc--VIc.
　図７は、本実施の形態に係る絶縁部材６００がサイド部材５００に取り付けられる構成を示す斜視図である。具体的には、図７の（ａ）は、蓄電素子２００及びスペーサ３００が配置された構成を示す斜視図である。図７の（ｂ）は、蓄電素子２００及びスペーサ３００に、絶縁部材６００が配置された構成を示す斜視図である。図７の（ｃ）は、蓄電素子２００、スペーサ３００及び絶縁部材６００に、サイド部材５００が配置された構成を示す斜視図である。 FIG. 7 is a perspective view showing a configuration in which the insulating member 600 according to this embodiment is attached to the side member 500. FIG. Specifically, (a) of FIG. 7 is a perspective view showing a configuration in which the storage element 200 and the spacer 300 are arranged. (b) of FIG. 7 is a perspective view showing a configuration in which an insulating member 600 is arranged on the storage element 200 and the spacer 300 . (c) of FIG. 7 is a perspective view showing a configuration in which the side member 500 is arranged on the storage element 200 , the spacer 300 and the insulating member 600 .
　図４に示すように、サイド部材５００は、サイド部材本体５１０と、サイド部材壁部５２０と、を有している。図５に示すように、絶縁部材６００は、絶縁部材本体６１０と、突出部６２０と、を有している。 As shown in FIG. 4, the side member 500 has a side member main body 510 and side member wall portions 520 . As shown in FIG. 5 , the insulating member 600 has an insulating member main body 610 and a projecting portion 620 .
　サイド部材５００のサイド部材本体５１０は、複数の蓄電素子２００及び複数のスペーサ３００とＹ軸方向において対向して配置され、Ｘ軸方向に延びるＸＺ平面に平行な平板状かつ矩形状の部位である。サイド部材本体５１０には、開口部５１１が形成されている。開口部５１１は、サイド部材本体５１０のＺ軸プラス方向の端部に配置され、サイド部材本体５１０のＸ軸方向の一端部から他端部までＸ軸方向に延び、サイド部材本体５１０をＹ軸方向に貫通する貫通孔である。 A side member main body 510 of the side member 500 is arranged to face the plurality of power storage elements 200 and the plurality of spacers 300 in the Y-axis direction, and is a plate-like rectangular portion parallel to the XZ plane extending in the X-axis direction. . An opening 511 is formed in the side member main body 510 . The opening 511 is arranged at the end of the side member main body 510 in the positive Z-axis direction, extends in the X-axis direction from one end of the side member main body 510 to the other end in the X-axis direction, and extends the side member main body 510 along the Y-axis. It is a through hole penetrating in the direction.
　サイド部材５００のサイド部材壁部５２０は、サイド部材本体５１０のＸ軸方向両側の端部からエンド部材４００に向けてＹ軸方向に突出し、かつ、Ｚ軸方向に延びる平板状の部位である。それぞれのサイド部材壁部５２０には、Ｚ軸方向に並ぶ複数（本実施の形態では、２つ）の円形状の貫通孔５２１が形成されている。サイド部材壁部５２０がエンド部材４００に重ねられて配置され、貫通孔５２１にエンド部材４００の接続部材４００ａが挿入されて、接続部材４００ａと接続部材５００ａとが接続（接合）されることで、サイド部材５００がエンド部材４００に固定される（図６等参照）。 The side member wall portions 520 of the side member 500 are plate-shaped portions that protrude in the Y-axis direction from both ends of the side member main body 510 in the X-axis direction toward the end member 400 and extend in the Z-axis direction. Each side member wall portion 520 is formed with a plurality of (two in the present embodiment) circular through-holes 521 aligned in the Z-axis direction. The side member wall portion 520 is arranged overlapping the end member 400, the connection member 400a of the end member 400 is inserted into the through hole 521, and the connection member 400a and the connection member 500a are connected (joined), The side member 500 is fixed to the end member 400 (see FIG. 6, etc.).
　絶縁部材６００の絶縁部材本体６１０は、複数の蓄電素子２００とＺ軸方向において対向し、複数の蓄電素子２００のＺ軸プラス方向に配置される、ＸＹ平面に平行な板状かつ矩形状の部位である。絶縁部材本体６１０は、複数の開口部６１１と、流路形成部６１２と、を有している。開口部６１１は、絶縁部材本体６１０のＹ軸方向両端部においてＸ軸方向に並んで配置され、絶縁部材本体６１０をＺ軸方向に貫通する矩形状の貫通孔であり、内方にバスバー７００が配置される。本実施の形態では、５つのバスバー７００に対応して、５つの開口部６１１が形成されている。流路形成部６１２は、絶縁部材本体６１０のＹ軸方向中央部にＸ軸方向に延びて配置された、絶縁部材本体６１０のＺ軸マイナス方向の面がＺ軸プラス方向に凹んだ凹部である。流路形成部６１２は、この凹部によって、蓄電素子２００のガス排出弁２３１から排出されるガスが流れる流路を形成する。 An insulating member main body 610 of the insulating member 600 is a plate-shaped rectangular portion parallel to the XY plane that faces the plurality of power storage elements 200 in the Z-axis direction and is arranged in the positive Z-axis direction of the plurality of power storage elements 200. is. The insulating member main body 610 has a plurality of openings 611 and flow path forming portions 612 . The openings 611 are rectangular through holes arranged side by side in the X-axis direction at both ends of the insulating member main body 610 in the Y-axis direction and penetrating through the insulating member main body 610 in the Z-axis direction. placed. In this embodiment, five openings 611 are formed corresponding to five busbars 700 . The flow path forming portion 612 is a concave portion extending in the X-axis direction at the center portion of the insulating member main body 610 in the Y-axis direction. . The flow path forming portion 612 forms a flow path through which the gas discharged from the gas discharge valve 231 of the power storage element 200 flows.
　絶縁部材６００の突出部６２０は、絶縁部材本体６１０のＹ軸方向端部から、Ｙ軸方向（第二方向）においてサイド部材５００に向けて突出して配置される部位である。絶縁部材本体６１０のＹ軸方向両端部のそれぞれに、複数の突出部６２０が配置されている。具体的には、複数の蓄電素子２００のそれぞれに対応して、複数の突出部６２０が配置されている。本実施の形態では、Ｘ軸方向に並ぶ８個の蓄電素子２００に対応して、絶縁部材本体６１０のＹ軸方向両端部のそれぞれに、Ｘ軸方向に並ぶ８個の突出部６２０が配置されている。複数の突出部６２０は、Ｘ軸方向（第一方向）において、間隔を空けて並んで配置されており、隣り合う２つの突出部６２０の間に、空間６３０が形成されている。 The protruding portion 620 of the insulating member 600 is a portion arranged to protrude from the Y-axis direction end portion of the insulating member main body 610 toward the side member 500 in the Y-axis direction (second direction). A plurality of projecting portions 620 are arranged at both ends of the insulating member main body 610 in the Y-axis direction. Specifically, a plurality of protrusions 620 are arranged corresponding to each of the plurality of power storage elements 200 . In the present embodiment, eight protruding portions 620 aligned in the X-axis direction are arranged at both ends of the insulating member main body 610 in the Y-axis direction, corresponding to the eight power storage elements 200 aligned in the X-axis direction. ing. The plurality of projecting portions 620 are arranged side by side at intervals in the X-axis direction (first direction), and a space 630 is formed between two adjacent projecting portions 620 .
　それぞれの突出部６２０は、第一突出部６２１と、第二突出部６２２と、を有している。第一突出部６２１は、絶縁部材本体６１０のＹ軸方向端部からＺ軸マイナス方向に延びる、ＸＺ平面に平行な平板状の部位である。図５の（ｂ）及び（ｃ）に示すように、第一突出部６２１は、Ｚ軸マイナス方向に向かうほどＸ軸方向の幅が狭くなる形状（本実施の形態では、逆台形状）を有している。これにより、隣り合う２つの第一突出部６２１の間に形成される空間６３０は、Ｚ軸マイナス方向に向かうほどＸ軸方向の幅が広くなっている。第二突出部６２２は、第一突出部６２１のＺ軸マイナス方向端部から、サイド部材５００に向けてＹ軸方向に突出（図５の（ｂ）～（ｄ）では、Ｙ軸マイナス方向に突出）する、第一突出部６２１に沿ってＸ軸方向に延びる長尺状の部位である。第二突出部６２２は、Ｙ軸方向の先端部のＺ軸プラス方向の角部に面取りが施されている。 Each protrusion 620 has a first protrusion 621 and a second protrusion 622 . The first protruding portion 621 is a plate-like portion parallel to the XZ plane and extending in the negative Z-axis direction from the Y-axis direction end of the insulating member main body 610 . As shown in (b) and (c) of FIG. 5, the first projecting portion 621 has a shape in which the width in the X-axis direction becomes narrower toward the negative Z-axis direction (inverted trapezoidal shape in the present embodiment). have. As a result, the space 630 formed between two adjacent first projecting portions 621 has a wider width in the X-axis direction toward the negative Z-axis direction. The second protrusion 622 protrudes from the end of the first protrusion 621 in the negative Z-axis direction toward the side member 500 in the Y-axis direction (in FIGS. 5B to 5D , in the negative Y-axis direction protruding) and extending in the X-axis direction along the first protrusion 621 . The second protruding portion 622 has chamfered corners in the positive Z-axis direction of the tip in the Y-axis direction.
　以上のように、絶縁部材６００及びサイド部材５００の一方（本実施の形態では、絶縁部材６００）は、他方（本実施の形態では、サイド部材５００）に向けて突出する複数の突出部６２０を有し、他方（サイド部材５００）は、開口部５１１を有している。 As described above, one of the insulating member 600 and the side member 500 (insulating member 600 in this embodiment) has a plurality of protruding portions 620 that protrude toward the other (side member 500 in this embodiment). and the other (side member 500 ) has an opening 511 .
　このような構成において、図６及び図７に示すように、絶縁部材６００の突出部６２０がサイド部材５００の開口部５１１に挿入されることで、絶縁部材６００がサイド部材５００に取り付けられる。つまり、Ｘ軸方向（第一方向）に並ぶ複数の突出部６２０が、Ｘ軸方向（第一方向）に延びる１つの開口部５１１に挿入されることで、絶縁部材６００がサイド部材５００に取り付けられる。 In such a configuration, as shown in FIGS. 6 and 7, the insulating member 600 is attached to the side member 500 by inserting the protrusion 620 of the insulating member 600 into the opening 511 of the side member 500 . That is, the insulating member 600 is attached to the side member 500 by inserting a plurality of protrusions 620 arranged in the X-axis direction (first direction) into one opening 511 extending in the X-axis direction (first direction). be done.
　具体的には、図７の（ａ）に示すように、隣り合う２つの蓄電素子２００の間にスペーサ３００が配置される場合、スペーサ３００は、蓄電素子２００からＹ軸方向に突出した状態で配置される。この状態において、図７の（ｂ）に示すように、蓄電素子２００及びスペーサ３００のＺ軸プラス方向に、絶縁部材６００が配置（載置）される。この場合、スペーサ３００は、蓄電素子２００からＹ軸方向に突出しているため、スペーサ３００の突出部分は、複数の突出部６２０（第一突出部６２１）の間の空間６３０に挿入されて配置される。空間６３０は、上述の通り、Ｚ軸マイナス方向に向かうほどＸ軸方向の幅が広くなっているため、スペーサ３００が挿入しやすい形状となっている。 Specifically, as shown in (a) of FIG. 7, when the spacer 300 is arranged between two adjacent power storage elements 200, the spacer 300 protrudes from the power storage element 200 in the Y-axis direction. placed. In this state, as shown in (b) of FIG. 7, the insulating member 600 is arranged (placed) in the Z-axis plus direction of the storage element 200 and the spacer 300 . In this case, since the spacer 300 protrudes from the power storage element 200 in the Y-axis direction, the protruding portion of the spacer 300 is inserted into the space 630 between the plurality of protruding portions 620 (first protruding portions 621). be. As described above, the space 630 has a width in the X-axis direction that increases toward the negative Z-axis direction, so that the space 630 has a shape that allows the spacer 300 to be easily inserted.
　次に、図７の（ｃ）に示すように、蓄電素子２００、スペーサ３００及び絶縁部材６００に、Ｙ軸方向からサイド部材５００が配置される。この際、絶縁部材６００が有する複数の突出部６２０が、サイド部材５００に形成された１つの開口部５１１に挿入されることで、絶縁部材６００がサイド部材５００に取り付けられる。具体的には、突出部６２０の第二突出部６２２が、開口部５１１に挿入される。上述の通り、第二突出部６２２は、先端部のＺ軸プラス方向の角部に面取りが施されているため、開口部５１１に挿入しやすい形状となっている。第二突出部６２２は、先端部のＺ軸マイナス方向の角部にも面取りが施されていてもよい。 Next, as shown in (c) of FIG. 7, the side member 500 is arranged on the storage element 200, the spacer 300, and the insulating member 600 from the Y-axis direction. At this time, the insulating member 600 is attached to the side member 500 by inserting the plurality of projections 620 of the insulating member 600 into one opening 511 formed in the side member 500 . Specifically, the second protrusion 622 of the protrusion 620 is inserted into the opening 511 . As described above, the second protruding portion 622 has a chamfered corner portion in the positive Z-axis direction of the distal end portion, so that the second protruding portion 622 has a shape that facilitates insertion into the opening portion 511 . The second protruding portion 622 may also be chamfered at the corner portion of the tip portion in the negative Z-axis direction.
　本実施の形態では、図６の（ｃ）に示すように、第二突出部６２２は、Ｚ軸プラス方向の面が開口部５１１のＺ軸プラス方向の内面に接触し、かつ、Ｚ軸マイナス方向の面は開口部５１１のＺ軸マイナス方向の内面から離間した状態で、開口部５１１に挿入される。これにより、第二突出部６２２（突出部６２０）は、Ｚ軸方向の両側で開口部５１１によって移動が規制された状態で配置されている。 In the present embodiment, as shown in (c) of FIG. 6, the surface of the second projecting portion 622 in the positive Z-axis direction contacts the inner surface of the opening 511 in the positive Z-axis direction, and The direction surface is inserted into the opening 511 while being spaced from the inner surface of the opening 511 in the negative Z-axis direction. As a result, the second projecting portion 622 (projecting portion 620) is arranged with its movement restricted by the openings 511 on both sides in the Z-axis direction.
　このように、絶縁部材６００は、Ｚ軸方向（第三方向）の両側への移動が規制された状態で配置されて、サイド部材５００に取り付けられる。 In this way, the insulating member 600 is attached to the side member 500 in such a manner that its movement to both sides in the Z-axis direction (third direction) is restricted.
　絶縁部材６００は、Ｚ軸方向の両側の双方でサイド部材５００と接触していてもよいし、Ｚ軸方向の両側のうちのいずれか一方でサイド部材５００と接触していてもよいし、Ｚ軸方向の両側の双方ともにサイド部材５００と離間していてもよい。つまり、突出部６２０（第二突出部６２２）は、Ｚ軸方向の両側の双方で開口部５１１と接触していてもよいし、Ｚ軸方向の両側のうちのいずれか一方で開口部５１１と接触していてもよいし、Ｚ軸方向の両側の双方ともに開口部５１１と離間していてもよい。本実施の形態では、絶縁部材６００は、Ｚ軸プラス方向においてサイド部材５００と接触し、Ｚ軸マイナス方向においては、サイド部材５００と離間しており、Ｚ軸マイナス方向に動くことでサイド部材５００と接触する構成となっている。これにより、サイド部材５００は、絶縁部材６００を蓄電素子２００に向けてＺ軸マイナス方向に押し付けることができている。 The insulating member 600 may be in contact with the side member 500 on both sides in the Z-axis direction, or may be in contact with the side member 500 on either side in the Z-axis direction. Both sides in the axial direction may be separated from the side member 500 . That is, the protrusion 620 (second protrusion 622) may be in contact with the opening 511 on both sides in the Z-axis direction, or may be in contact with the opening 511 on either side in the Z-axis direction. They may be in contact with each other, or both sides in the Z-axis direction may be separated from the opening 511 . In this embodiment, the insulating member 600 is in contact with the side member 500 in the positive Z-axis direction and is separated from the side member 500 in the negative Z-axis direction. It is configured to come into contact with As a result, the side member 500 can press the insulating member 600 toward the power storage element 200 in the negative Z-axis direction.
　［４　効果の説明］
　以上のように、本発明の実施の形態に係る蓄電装置１０によれば、蓄電素子２００にＺ軸方向（第三方向）で対向して配置される絶縁部材６００が、サイド部材５００に取り付けられる。絶縁部材６００及びサイド部材５００の一方（本実施の形態では、絶縁部材６００）の突出部６２０が、他方（本実施の形態では、サイド部材５００）の開口部５１１に挿入される構成とすることで、絶縁部材６００をサイド部材５００に容易に取り付けることができる。 [4 Explanation of effects]
As described above, according to the power storage device 10 according to the embodiment of the present invention, the insulating member 600 arranged to face the power storage element 200 in the Z-axis direction (third direction) is attached to the side member 500. . The protrusion 620 of one of the insulating member 600 and the side member 500 (the insulating member 600 in this embodiment) is inserted into the opening 511 of the other (the side member 500 in this embodiment). , the insulating member 600 can be easily attached to the side member 500 .
　絶縁部材６００は、一般的に樹脂等の加工しやすい部材で形成できるため、絶縁部材６００に、Ｙ軸方向（第二方向）に突出する突出部６２０を形成することで、突出部６２０を容易に形成できる。サイド部材５００は、金属等の硬い材質で形成されるため、突出部６２０のような複雑な形状とするよりも、開口部５１１を形成した簡易な形状とする。これにより、絶縁部材６００をサイド部材５００に取り付ける構成を容易に形成できるため、絶縁部材６００を蓄電素子２００に対して容易に固定できる。 Since the insulating member 600 can generally be formed of a material that is easy to process, such as resin, by forming the projecting portion 620 projecting in the Y-axis direction (second direction) in the insulating member 600, the projecting portion 620 can be easily formed. can be formed to Since the side member 500 is made of a hard material such as metal, it has a simple shape with an opening 511 rather than a complicated shape like the protrusion 620 . As a result, the structure for attaching the insulating member 600 to the side member 500 can be easily formed, so that the insulating member 600 can be easily fixed to the power storage element 200 .
　絶縁部材６００及びサイド部材５００の一方（絶縁部材６００）が有する複数の突出部６２０が、他方（サイド部材５００）に形成された１つの開口部５１１に挿入される構成とすることで、複数の突出部６２０が独立して変形して１つの開口部５１１に挿入される。このため、突出部６２０を開口部５１１に容易に挿入できる。 One of the insulating member 600 and the side member 500 (the insulating member 600) has a plurality of protrusions 620 that are inserted into one opening 511 formed in the other (the side member 500). The projections 620 are independently deformed and inserted into one opening 511 . Therefore, the projecting portion 620 can be easily inserted into the opening portion 511 .
　絶縁部材６００及びサイド部材５００の一方（絶縁部材６００）が有する複数の突出部６２０がＸ軸方向（第一方向）に並んで配置されて、他方（サイド部材５００）の、Ｘ軸方向（第一方向）に延びる開口部５１１に挿入される。これにより、Ｘ軸方向（第一方向）に亘って、絶縁部材６００をサイド部材５００に取り付けることができる。複数の突出部６２０が間隔を空けて並ぶことで、複数の突出部６２０が開口部５１１に挿入される際に、突出部６２０同士が互いに干渉したり、突出部６２０と他の部材（スペーサ３００等）とが干渉するのを抑制できる。 A plurality of protruding portions 620 of one of the insulating member 600 and the side member 500 (insulating member 600) are arranged side by side in the X-axis direction (first direction), and the other (side member 500) of the X-axis direction (first one direction). Thereby, the insulating member 600 can be attached to the side member 500 over the X-axis direction (first direction). By arranging the plurality of protrusions 620 at intervals, when the plurality of protrusions 620 are inserted into the opening 511, the protrusions 620 may interfere with each other, or the protrusions 620 may interfere with other members (spacers 300). etc.) can be suppressed.
　絶縁部材６００及びサイド部材５００の一方（絶縁部材６００）が有する複数の突出部６２０の間の空間６３０にスペーサ３００が挿入される構成とすることで、Ｙ軸方向（第二方向）においてスペーサ３００の長さを長くでき、絶縁性を向上できる。スペーサ３００によって、突出部６２０の位置決めを行うこともできる。これにより、絶縁性を確保しつつ、絶縁部材６００をサイド部材５００に容易に取り付けることができる。 By adopting a configuration in which the spacer 300 is inserted into the space 630 between the plurality of projecting portions 620 of one of the insulating member 600 and the side member 500 (the insulating member 600), the spacer 300 is arranged in the Y-axis direction (second direction). length can be lengthened, and insulation can be improved. Spacer 300 may also position protrusion 620 . This makes it possible to easily attach the insulating member 600 to the side member 500 while ensuring insulation.
　［５　変形例の説明］
　以上、本実施の形態に係る蓄電装置１０について説明したが、本発明は、上記実施の形態には限定されない。今回開示された実施の形態は、全ての点で例示であって制限的なものではなく、本発明の範囲には、特許請求の範囲と均等の意味及び範囲内での全ての変更が含まれる。 [5 Description of Modified Example]
Although power storage device 10 according to the present embodiment has been described above, the present invention is not limited to the above embodiment. The embodiments disclosed this time are illustrative in all respects and are not restrictive, and the scope of the present invention includes all modifications within the meaning and range of equivalents to the claims. .
　上記実施の形態では、絶縁部材６００は、バスバー７００の位置規制等を行うバスバーホルダであることとしたが、基板、リレー、ヒューズ、シャント抵抗、コネクタ、または、配線等の電気部品が固定される絶縁部材でもよいし、その他どのような絶縁部材でもよい。つまり、絶縁部材６００は、Ｚ軸方向（第三方向）において蓄電素子２００に対向して配置される絶縁部材であれば、どのような絶縁部材でもよい。 In the above embodiment, the insulating member 600 is a busbar holder that regulates the position of the busbar 700. However, the insulating member 600 is fixed to electrical components such as substrates, relays, fuses, shunt resistors, connectors, and wiring. It may be an insulating member or any other insulating member. In other words, the insulating member 600 may be any insulating member as long as it is arranged to face the storage element 200 in the Z-axis direction (third direction).
上記実施の形態では、絶縁部材６００は、一部材で構成されることとしたが、複数の部材で構成されてもよい。絶縁部材６００を一部材で構成すれば、絶縁部材６００の構成を簡素にできる。 Although the insulating member 600 is composed of one member in the above embodiment, it may be composed of a plurality of members. If the insulating member 600 is configured by one member, the configuration of the insulating member 600 can be simplified.
　上記実施の形態では、絶縁部材６００は、一対のサイド部材５００の双方に取り付けられることとしたが、一対のサイド部材５００のうちのいずれか一方にしか取り付けられなくてもよい。 Although the insulating member 600 is attached to both the pair of side members 500 in the above embodiment, it may be attached to only one of the pair of side members 500 .
　上記実施の形態では、サイド部材５００は、開口部５１１として、サイド部材本体５１０をＹ軸方向に貫通する貫通孔を備えるが、サイド部材５００は、サイド部材本体５１０の絶縁部材６００（突出部６２０）に対向する面がＹ軸方向に凹んだ凹部を備えてもよい。図８Ａに示すように、絶縁部材６００の突出部６２０の第二突出部６２２が、サイド部材５００のサイド部材本体５１０の凹部５１２に挿入されることで、絶縁部材６００が、Ｚ軸方向の両側でサイド部材５００と接触可能な状態で配置される。図８Ａは、本実施の形態の変形例に係る絶縁部材６００がサイド部材５００に取り付けられた状態での構成を示す断面図である。図８Ａは、図６の（ｃ）に対応する図である。 In the above embodiment, the side member 500 has a through hole as the opening 511 that penetrates the side member main body 510 in the Y-axis direction. ) may be provided with a recess recessed in the Y-axis direction. As shown in FIG. 8A, the second protrusion 622 of the protrusion 620 of the insulating member 600 is inserted into the recess 512 of the side member main body 510 of the side member 500, so that the insulating member 600 is extended to both sides in the Z-axis direction. is arranged in a state in which it can contact with the side member 500 at . FIG. 8A is a cross-sectional view showing a configuration in which insulating member 600 according to a modification of the present embodiment is attached to side member 500. FIG. FIG. 8A is a diagram corresponding to (c) of FIG.
　上記実施の形態では、絶縁部材６００の突出部６２０の第二突出部６２２は、Ｘ軸方向に長尺な形状を有していることとしたが、円柱形状等、Ｘ軸方向に短い形状でもよい。この場合、サイド部材５００の開口部５１１についても、Ｘ軸方向に延びない構成を採用できる。 In the above embodiment, the second projecting portion 622 of the projecting portion 620 of the insulating member 600 has a shape elongated in the X-axis direction. good. In this case, the opening 511 of the side member 500 can also be configured so as not to extend in the X-axis direction.
　上記実施の形態では、絶縁部材６００に突出部６２０が設けられ、サイド部材５００に突出部６２０が挿入される開口部５１１が設けられることとしたが、サイド部材５００に突出部が設けられ、絶縁部材６００に当該突出部が挿入される開口部または凹部が設けられてもよい。 In the above embodiment, the insulating member 600 is provided with the projecting portion 620, and the side member 500 is provided with the opening 511 into which the projecting portion 620 is inserted. The member 600 may be provided with an opening or recess into which the protrusion is inserted.
　サイド部材が備える凹部は、サイド部材本体５１０の絶縁部材６００（突出部６２０）に対向する面がＹ軸方向に凹んだ凹部でなくてもよい。図８Ｂに示すように、サイド部材５００が突出部５１３を備え、突出部５１３によって凹部が形成されてもよい。言い換えれば、サイド部材５００が突出部５１３を備え、突出部５１３の間に凹部が形成されてもよい。図８Ｂは、本実施の形態の変形例に係る絶縁部材６００がサイド部材５００に取り付けられた状態での構成を示す断面図である。図８Ｂは、図６の（ｃ）に対応する図である。 The concave portion provided in the side member may not be a concave portion in which the surface of the side member main body 510 facing the insulating member 600 (protruding portion 620) is concave in the Y-axis direction. As shown in FIG. 8B, the side member 500 may include a protrusion 513 with a recess formed by the protrusion 513 . In other words, the side member 500 may include protrusions 513 with recesses formed between the protrusions 513 . FIG. 8B is a cross-sectional view showing a configuration in which insulating member 600 according to a modification of the present embodiment is attached to side member 500. As shown in FIG. FIG. 8B is a diagram corresponding to (c) of FIG.
　上記実施の形態では、複数の突出部６２０は、間隔を空けてＸ軸方向（第一方向）に並んで配置されることとしたが、間隔を空けずに配置されてもよいし、Ｚ軸方向またはその他の方向に並んで配置されてもよい。この場合、開口部５１１は、複数の突出部６２０の配置位置に対応する位置、大きさ及び形状で形成される。 In the above-described embodiment, the plurality of projecting portions 620 are arranged side by side in the X-axis direction (first direction) at intervals. may be arranged side by side in one direction or another. In this case, the openings 511 are formed in positions, sizes and shapes corresponding to the arrangement positions of the plurality of protrusions 620 .
　上記実施の形態では、絶縁部材６００及びサイド部材５００に、複数の突出部６２０及び１つの開口部５１１が設けられて、複数の突出部６２０が１つの開口部５１１に挿入されることとしたが、１つの突出部６２０が１つの開口部５１１に挿入される構成でもよい。つまり、絶縁部材６００に１つの突出部６２０しか設けられておらず、当該１つの突出部６２０が１つの開口部５１１に挿入されてもよい。サイド部材５００に、複数の突出部６２０のそれぞれに対応した複数の開口部５１１が設けられており、それぞれの突出部６２０がそれぞれの開口部５１１に挿入されてもよい。 In the above embodiment, the insulating member 600 and the side member 500 are provided with a plurality of projections 620 and one opening 511, and the plurality of projections 620 are inserted into one opening 511. , one protrusion 620 may be inserted into one opening 511 . That is, the insulating member 600 may have only one projection 620 and the one projection 620 may be inserted into one opening 511 . A plurality of openings 511 corresponding to the plurality of projections 620 are provided in the side member 500 , and each projection 620 may be inserted into each opening 511 .
　上記実施の形態では、突出部６２０が開口部５１１に挿入されることで、絶縁部材６００がサイド部材５００に取り付けられることとしたが、突出部６２０は、スナップフィット構造または潰しリブ構造等によって開口部５１１に嵌合（圧入）されてもよい。これにより、突出部６２０と開口部５１１との寸法公差を吸収したりガタツキを抑制できる。例えば図８Ｃに示すように、突出部６２０の第二突出部６２２が、スナップフィット構造によってサイド部材５００のサイド部材本体５１０の凹部５１２に挿入されることで、絶縁部材６００が、Ｚ軸方向の両側でサイド部材５００と接触可能な状態で配置される。この場合、絶縁部材６００は、Ｙ軸方向においてもサイド部材５００と接触可能な状態で配置される。図８Ｃは、本実施の形態の変形例に係る絶縁部材６００がサイド部材５００に取り付けられた状態での構成を示す断面図である。図８Ｃは、図６の（ｃ）に対応する図である。 In the above embodiment, the insulating member 600 is attached to the side member 500 by inserting the projecting portion 620 into the opening 511. It may be fitted (press-fitted) into the portion 511 . This makes it possible to absorb the dimensional tolerance between the projecting portion 620 and the opening portion 511 and to suppress rattling. For example, as shown in FIG. 8C, the second protrusion 622 of the protrusion 620 is inserted into the recess 512 of the side member main body 510 of the side member 500 by a snap-fit structure, so that the insulating member 600 extends in the Z-axis direction. It is arranged so that it can contact with the side member 500 on both sides. In this case, the insulating member 600 is arranged so as to be in contact with the side member 500 also in the Y-axis direction. FIG. 8C is a cross-sectional view showing a configuration in which insulating member 600 according to a modification of the present embodiment is attached to side member 500. As shown in FIG. FIG. 8C is a diagram corresponding to (c) of FIG.
　上記実施の形態では、複数の突出部６２０の間の空間６３０にスペーサ３００が挿入されることとしたが、空間６３０には、スペーサ３００以外の部材が挿入されてもよいし、何も挿入されない構成でもよい。 In the above embodiment, the spacer 300 is inserted into the space 630 between the plurality of projecting portions 620, but a member other than the spacer 300 may be inserted into the space 630, or nothing may be inserted. may be configured.
　上記実施の形態及びその変形例に含まれる構成要素を任意に組み合わせて構築される形態も、本発明の範囲内に含まれる。 Forms constructed by arbitrarily combining the constituent elements included in the above embodiments and modifications thereof are also included within the scope of the present invention.
　本発明は、このような蓄電装置１０として実現できるだけでなく、サイド部材５００と絶縁部材６００との組み合わせとしても実現できる。 The present invention can be realized not only as such a power storage device 10, but also as a combination of the side member 500 and the insulating member 600.
　本発明は、リチウムイオン二次電池等の蓄電素子を備えた蓄電装置等に適用できる。 The present invention can be applied to a power storage device or the like having a power storage element such as a lithium ion secondary battery.
　１０　蓄電装置
　１００　外装体
　２００　蓄電素子
　２１０　容器
　２３１　ガス排出弁
　２４０　電極端子
　３００　スペーサ
　４００　エンド部材
　４００ａ、５００ａ　接続部材
　５００　サイド部材
　５１０　サイド部材本体
　５１１、６１１　開口部
　５１２　凹部
　５１３　突出部
　５２０　サイド部材壁部
　５２１　貫通孔
　６００　絶縁部材
　６１０　絶縁部材本体
　６１２　流路形成部
　６２０　突出部
　６２１　第一突出部
　６２２　第二突出部
　６３０　空間
　７００　バスバー REFERENCE SIGNS LIST 10 power storage device 100 exterior body 200 power storage element 210 container 231 gas discharge valve 240 electrode terminal 300 spacer 400 end member 400a, 500a connection member 500 side member 510 side member main body 511, 611 opening 512 recess 513 projection 520 side member wall 521 Through hole 600 Insulating member 610 Insulating member main body 612 Flow path forming part 620 Protruding part 621 First protruding part 622 Second protruding part 630 Space 700 Bus bar

Claims (5)

  1. 　蓄電素子と、
    　第一方向において前記蓄電素子を挟む一対のエンド部材と、
    　前記第一方向と交差する第二方向において前記蓄電素子に対向して配置され、前記一対のエンド部材を繋ぐサイド部材と、
    　前記第一方向及び前記第二方向と交差する第三方向において前記蓄電素子に対向して配置される絶縁部材と、を備え、
    　前記絶縁部材及び前記サイド部材の一方は、前記絶縁部材及び前記サイド部材の他方に向けて突出する突出部を有し、前記絶縁部材及び前記サイド部材の前記他方は、前記突出部が挿入される開口部または凹部を有し、
    　前記突出部が前記開口部または前記凹部に挿入されることで、前記絶縁部材が前記サイド部材に取り付けられる
    　蓄電装置。     a storage element;
    a pair of end members sandwiching the power storage element in a first direction;
    a side member arranged to face the storage element in a second direction intersecting the first direction and connecting the pair of end members;
    an insulating member arranged to face the power storage element in a third direction that intersects the first direction and the second direction;
    One of the insulating member and the side member has a protrusion projecting toward the other of the insulating member and the side member, and the protrusion is inserted into the other of the insulating member and the side member. having an opening or recess,
    A power storage device in which the insulating member is attached to the side member by inserting the projecting portion into the opening or the recess.
  2. 　前記絶縁部材及び前記サイド部材の前記一方は、前記絶縁部材であり、
    　前記突出部は、前記第二方向において前記サイド部材に向けて突出して配置される
    　請求項１に記載の蓄電装置。     the one of the insulating member and the side member is the insulating member;
    The power storage device according to claim 1 , wherein the protrusion is arranged to protrude toward the side member in the second direction.
  3. 　前記絶縁部材及び前記サイド部材の前記一方は、複数の前記突出部を有し、
    　複数の前記突出部が１つの前記開口部または前記凹部に挿入されることで、前記絶縁部材が前記サイド部材に取り付けられる
    　請求項１または２に記載の蓄電装置。     the one of the insulating member and the side member has a plurality of protrusions;
    The power storage device according to claim 1 or 2, wherein the insulating member is attached to the side member by inserting a plurality of the projections into one of the openings or the recesses.
  4. 　複数の前記突出部は、前記第一方向において、間隔を空けて並んで配置され、
    　複数の前記突出部が、前記第一方向に延びる前記開口部または前記凹部に挿入されることで、前記絶縁部材が前記サイド部材に取り付けられる
    　請求項３に記載の蓄電装置。     the plurality of protrusions are arranged side by side at intervals in the first direction,
    The power storage device according to claim 3, wherein the insulating member is attached to the side member by inserting the plurality of protrusions into the opening or the recess extending in the first direction.
  5. 　前記第一方向において前記蓄電素子と並んで配置されるスペーサをさらに備え、
    　前記スペーサは、複数の前記突出部の間の空間に挿入されて配置される
    　請求項４に記載の蓄電装置。     further comprising a spacer arranged in parallel with the power storage element in the first direction;
    The power storage device according to claim 4, wherein the spacer is inserted into a space between the plurality of protrusions.
PCT/JP2022/028720 2021-08-02 2022-07-26 Power storage device WO2023013466A1 (en)

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US20140356690A1 (en) * 2013-05-29 2014-12-04 Samsung Sdi Co., Ltd. Battery module
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JP2020522849A (en) * 2018-01-12 2020-07-30 エルジー・ケム・リミテッド Battery module, battery pack including the same, and automobile
WO2021024771A1 (en) * 2019-08-07 2021-02-11 三洋電機株式会社 Power supply device, electric vehicle using same, and power storage device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140338995A1 (en) * 2013-05-20 2014-11-20 GM Global Technology Operations LLC Battery enclosure systems and methods
US20140356690A1 (en) * 2013-05-29 2014-12-04 Samsung Sdi Co., Ltd. Battery module
US20170125753A1 (en) * 2015-11-02 2017-05-04 Samsung Sdi Co., Ltd. Rechargeable battery module
JP2020522849A (en) * 2018-01-12 2020-07-30 エルジー・ケム・リミテッド Battery module, battery pack including the same, and automobile
WO2021024771A1 (en) * 2019-08-07 2021-02-11 三洋電機株式会社 Power supply device, electric vehicle using same, and power storage device

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