WO2022230435A1 - Power storage device - Google Patents

Power storage device Download PDF

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Publication number
WO2022230435A1
WO2022230435A1 PCT/JP2022/012282 JP2022012282W WO2022230435A1 WO 2022230435 A1 WO2022230435 A1 WO 2022230435A1 JP 2022012282 W JP2022012282 W JP 2022012282W WO 2022230435 A1 WO2022230435 A1 WO 2022230435A1
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WO
WIPO (PCT)
Prior art keywords
power storage
lid
insert
axis direction
fastening
Prior art date
Application number
PCT/JP2022/012282
Other languages
French (fr)
Japanese (ja)
Inventor
隼輔 奥田
謙志 河手
延言 柴田
彬 和田
Original Assignee
株式会社Ｇｓユアサ
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社Ｇｓユアサ filed Critical 株式会社Ｇｓユアサ
Publication of WO2022230435A1 publication Critical patent/WO2022230435A1/en

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/74—Terminals, e.g. extensions of current collectors
    • 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
    • H01M50/251—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for stationary devices, e.g. power plant buffering or backup power supplies
    • 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
    • H01M50/296—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by terminals of battery 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
    • H01M50/543—Terminals
    • H01M50/552—Terminals characterised by their shape
    • H01M50/553—Terminals adapted for prismatic, pouch 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
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/564—Terminals characterised by their manufacturing process
    • 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 that includes a power storage element and an exterior body.
  • connection groove is formed in a lid, which is a part of an exterior body.
  • a device in which the terminal is fixed is known.
  • the present invention was made by the inventors of the present invention by newly paying attention to the above problem, and an object of the present invention is to provide a power storage device capable of suppressing damage to a conductive member when an external conductor is fastened to the conductive member. .
  • a power storage device includes a power storage element, an exterior body that houses the power storage element, and a conductive member that electrically connects an external device arranged outside the exterior body to the power storage element.
  • the exterior body includes an exterior main body that houses the storage element, and a lid that closes the exterior main body and holds the conductive member.
  • the conductive member protrudes from the lid, and is on the same plane as the fastening portion to which the external conductor connected to the external device is fastened, and the base portion of the fastening portion in a direction intersecting the projecting direction of the fastening portion. and an extension part that extends.
  • the base portion and extension portion of the fastening portion have a first insert portion embedded in the lid by insert molding.
  • the power storage device of the present invention it is possible to suppress damage to the conductive member when fastening the external conductor to the conductive 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 an exploded perspective view showing a schematic configuration of the power storage unit according to the embodiment.
  • FIG. 4 is a perspective view showing an integrated structure of an external terminal and a lid according to the embodiment.
  • FIG. 5 is a perspective view showing an external terminal according to the embodiment.
  • FIG. 6 is a perspective view showing an external terminal according to the embodiment.
  • FIG. 7 is a cross-sectional perspective view showing an integrated structure of a lid body and an external terminal according to the embodiment.
  • FIG. 8 is a cross-sectional perspective view showing an integrated structure of a lid body and an external terminal according to the embodiment.
  • FIG. 9 is a cross-sectional perspective view showing the integral structure of the lid body and the external terminal according to the embodiment.
  • FIG. 10 is a cross-sectional perspective view showing the integral structure of the lid body and the external terminal according to the embodiment.
  • FIG. 11 is a bottom view showing an extension portion and a base portion of an external terminal according to Modification 1.
  • a power storage device includes a power storage element, an exterior body that houses the power storage element, and a conductive member that electrically connects an external device arranged outside the exterior body to the power storage element.
  • the exterior body includes an exterior main body that houses the storage element, and a lid that closes the exterior main body and holds the conductive member.
  • the conductive member protrudes from the lid, and is on the same plane as the fastening portion to which the external conductor connected to the external device is fastened, and the base portion of the fastening portion in a direction intersecting the projecting direction of the fastening portion. and an extension part that extends.
  • the base portion and extension portion of the fastening portion have a first insert portion embedded in the lid by insert molding.
  • the base portion and extension portion of the fastening portion of the conductive member have the first insert portion embedded in the cover body by insert molding, the stress received when fastening the external conductor to the fastening portion is reduced. It can be dispersed over a wide area on the lid at the base and extension of the part.
  • the extended portion extends on the same plane as the base portion of the fastening portion, the resin material can flow smoothly during insert molding. Therefore, it is possible to suppress the impact that the conductive member receives from the resin material at the time of insert molding, and it is possible to suppress the displacement of the conductive member.
  • the base portion and the extension portion of the fastening portion may be the first insert portion as a whole in the extension direction of the extension portion.
  • the base portion of the fastening portion and the extension portion are the first insert portion as a whole in the extension direction, the stress that acts upon fastening can be distributed over a wider range to the lid body. Therefore, the torque resistance performance of the conductive member can be further enhanced, and damage to the conductive member can be suppressed more reliably.
  • the conductive member may have a facing portion facing the base portion, and the facing portion may have a second insert portion embedded in the lid by insert molding.
  • the facing portion facing the base portion has the second insert portion embedded in the lid body by insert molding, the stress at the time of fastening can be dispersed to the lid body via the second insert portion. .
  • the torque resistance performance of the conductive member can be further enhanced, and damage to the conductive member can be suppressed more reliably.
  • the base of the fastening part and the part of the fastening part protruding from the lid may be twisted and damaged at the boundary during fastening.
  • the second insert since the second insert receives stress at a position facing the base of the fastening portion, twisting of the fastening portion as a whole is suppressed. Therefore, the torsion at the boundary portion described above is also suppressed, and damage at the boundary portion can be suppressed.
  • the first insert part may have a through hole, and a part of the lid body may be arranged in the through hole.
  • the rotation of the entire conductive member can be restricted by the part of the lid. Therefore, the integrity between the conductive member and the lid can be enhanced, the torque resistance performance of the conductive member can be enhanced, and damage to the conductive member can be more reliably suppressed.
  • the first insert part may be arranged along the outer surface of the lid.
  • the first insert portion is arranged along the outer surface of the lid, the heat of the conductive member can be radiated outward from the outer surface of the lid. That is, even if the torque resistance performance is improved by providing the first insert portion, it is possible to suppress the heat from being trapped inside the exterior body.
  • the first insert part may include the tip surface of the extension part.
  • the first insert part includes the tip surface of the extension part, the stress can be dispersed to the lid even with the tip surface, and the stress acting at the time of fastening can be dispersed to the lid over a wider range, Damage to the conductive member can be suppressed more reliably.
  • the tip surface is a surface facing in a different direction from the main surface in the extended portion, stress in a direction different from the stress acting on the main surface acts on the tip surface.
  • stresses in various directions can be dispersed in the lid, so that the torque resistance performance of the conductive member can be further enhanced.
  • the protruding direction of the electrode terminals of the storage elements provided in the storage device is defined as the X-axis direction.
  • the direction in which the plurality of storage elements are arranged is defined as the Y-axis direction.
  • the direction in which the main body and the lid are arranged in the exterior body of the power storage device or the vertical direction is defined as the Z-axis direction.
  • These X-axis direction, Y-axis direction, and Z-axis direction are directions that intersect each other (in the following embodiments and modifications thereof, they are orthogonal).
  • the Z-axis direction may not be the vertical direction depending on the mode of use, the Z-axis direction will be described below for convenience of explanation.
  • 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 side opposite to the positive direction of the X-axis.
  • expressions indicating relative directions or orientations such as parallel and orthogonal include cases where they are not strictly the directions or orientations. Two directions are orthogonal, not only means that the two directions are completely orthogonal, but also substantially orthogonal, that is, including a difference of about several percent also means
  • FIG. 1 is a perspective view showing the appearance of a power storage device 1 according to an embodiment.
  • FIG. 2 is an exploded perspective view showing each component when the power storage device 1 according to the embodiment is exploded.
  • the power storage device 1 is a device that can charge electricity from the outside and discharge electricity to the outside, and has a substantially rectangular parallelepiped shape in the present embodiment.
  • the power storage device 1 is a battery module (assembled battery) used for power storage, power supply, or the like.
  • the power storage device 1 is a battery for driving mobile bodies such as automobiles, motorcycles, water crafts, ships, snowmobiles, agricultural machinery, construction machinery, railroad vehicles for electric railways, or for starting engines.
  • the vehicles include electric vehicles (EV), hybrid electric vehicles (HEV), plug-in hybrid electric vehicles (PHEV), and fossil fuel (gasoline, light oil, liquefied natural gas, etc.) vehicles.
  • Examples of railway vehicles for the electric railway include electric trains, monorails, linear motor cars, and hybrid trains having both diesel engines and electric motors.
  • the power storage device 1 can also be used as a stationary battery or the like for home or business use.
  • the power storage device 1 includes a power storage unit 20 and an exterior body 10 that accommodates the power storage unit 20 .
  • the exterior body 10 has an exterior main body 11 that accommodates the power storage unit 20 and a lid body 12 that covers the top of the power storage unit 20 .
  • the exterior body 10 is a rectangular (box-shaped) container (module case) that constitutes the exterior body of the power storage device 1 .
  • the exterior body 10 is a member that fixes the power storage unit 20 and the like to predetermined positions and protects these elements from impacts and the like.
  • the exterior main body 11 is a bottomed rectangular tubular member with an open top, and the open portion is the opening 111 .
  • the opening 111 has a substantially rectangular shape in plan view.
  • the exterior main body 11 has two first wall portions 112 on both side surfaces in the X-axis direction, two second wall portions 113 on both side surfaces in the Y-axis direction, and a third wall portion 113 on the negative Z-axis direction side. It has a wall portion 114 .
  • the first wall portion 112 is a rectangular plate-like short side surface portion that forms the short side surface of the exterior main body portion 11 .
  • the second wall portion 113 is a rectangular plate-like long side surface that forms the long side surface of the exterior body portion 11 .
  • the third wall portion 114 is a rectangular plate-like bottom wall portion that forms the bottom surface of the exterior main body portion 11 .
  • the lid 12 is a member that closes the opening 111 of the exterior main body 11 , and is joined to the exterior main body 11 while covering the opening 111 of the exterior main body 11 .
  • the lid body 12 has both ends in the X-axis direction, and upper corners in the negative direction of the Y-axis are recessed, and a pair of external terminals 81 (positive electrode side and negative electrode side) are arranged in the pair of corners. ing.
  • a housing recess 121 in which a part of each external terminal 81 is housed is formed between the pair of corners of the lid 12 , and the housing recess 121 is closed by a small lid 125 .
  • accommodation recess 121 When power storage device 1 is manufactured, accommodation recess 121 is open, and after part of each external terminal 81 and bus bar 33 corresponding to external terminal 81 are fastened and connected, the accommodation recess is closed by small lid 125 . 121 is blocked.
  • the small lid 125 may be detachably joined to the housing recess 121, but may be fixed by adhesive or welding.
  • the external terminal 81 is electrically connected to the plurality of power storage elements 21 included in the power storage unit 20 via the plurality of bus bars 33 , fuses 34 and control board 35 .
  • Power storage device 1 charges electricity from the outside and discharges electricity to the outside through this external terminal 81 .
  • the external terminal 81 is made of a metal conductive member such as a copper alloy such as brass, copper, aluminum, or an aluminum alloy.
  • the external terminal 81 is an example of a conductive member for electrically connecting an external device arranged outside the exterior body 10 and each storage element 21 .
  • Each bus bar 33 is a plate-shaped member that electrically connects the external terminal 81 and the storage element 21 .
  • Each bus bar 33 is made of a conductive member made of metal such as copper, copper alloy, aluminum, or aluminum alloy.
  • the fuse 34 is a member that protects the control board 35, the plurality of storage elements 21, etc. from a large current exceeding the rating.
  • the fuse 34 cuts off the flow of current by melting when a current exceeding the rating flows.
  • the control board 35 has a plurality of electrical components, and these electrical components form a detection circuit for detecting the state of each storage element 21, a control circuit for controlling charging and discharging, and the like.
  • the exterior main body 11 and the lid 12 of the exterior 10 are made of polycarbonate (PC), polypropylene (PP), polyethylene (PE), polystyrene (PS), polyphenylene sulfide resin (PPS), polyphenylene ether (PPE (including modified PPE), )), polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polyether ether ketone (PEEK), tetrafluoroethylene/perfluoroalkyl vinyl ether (PFA), polytetrafluoroethylene (PTFE), polyether sulfone ( PES), ABS resin, or an insulating resin material such as a composite material thereof.
  • the exterior body 10 thereby avoids contact of the power storage element 21 and the like with external metal members and the like.
  • the integral structure of the lid 12 and the external terminal 81 will be described later.
  • FIG. 3 is an exploded perspective view showing a schematic configuration of the power storage unit 20 according to the embodiment.
  • the power storage unit 20 includes a plurality of power storage elements 21 and an accommodating portion 22 that accommodates the plurality of power storage elements 21 .
  • the storage element 21 is a secondary battery (single battery) capable of charging and discharging electricity, and more specifically, a non-aqueous electrolyte secondary battery such as a lithium ion secondary battery.
  • the power storage element 21 is a pouch-type power storage element having a flat shape, and a plurality of (four in the present embodiment) pouch-type power storage elements 21 are arranged side by side in the Y-axis direction. It is
  • the storage element 21 is not a pouch-type storage element, but may be a flat rectangular parallelepiped (square), cylindrical, oval or cylindric storage element, and its size and shape are not limited.
  • the number of power storage elements 21 to be arranged is also not particularly limited.
  • the storage element 21 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 21 may be a primary battery that can use stored electricity without being charged by the user, instead of a secondary battery.
  • FIG. 3 shows a state in which all the storage elements 21 are stacked.
  • the storage element 21 has a container 210 and a pair of electrode terminals 220 (positive electrode side and negative electrode side). ) (not shown).
  • the type thereof is not particularly limited as long as it does not impair the performance of the storage element 21, and known materials can be used as appropriate.
  • the container 210 is a sheet-like exterior body (exterior film) formed of a laminate film, and contains an electrode body, an electrolytic solution, and the like inside in a sealed state in a decompressed state.
  • the container 210 is configured by stacking two rectangular laminated films in the Y-axis direction. The two laminate films are joined (sealed) by thermal welding or the like with a pair of electrode terminals 220 interposed therebetween.
  • a laminate film is a flexible film composed of multiple layers including a metal layer such as aluminum and a resin layer such as polypropylene (PP) or polyethylene (PE). It is Note that the container 210 may be configured by forming a sheet of laminated film into a bag shape and joining the ends of the laminated film together by thermal welding. If the energy storage element 21 is not a pouch-type energy storage element, the container 210 may be made of a metallic plate member such as stainless steel, aluminum, aluminum alloy, iron, or plated steel plate.
  • the electrode terminal 220 is a conductive plate-like member (lead plate) electrically connected to the electrode body, and is arranged so as to be exposed from the container 210 while passing through the container 210 .
  • a pair of electrode terminals 220 aligned in the Z-axis direction are arranged to protrude in the negative X-axis direction from the end of the container 210 in the negative X-axis direction.
  • the positive electrode terminal 220 is a lead terminal electrically connected to the positive plate of the electrode body, and the negative electrode terminal 220 is electrically connected to the negative plate of the electrode body. It is a lead terminal.
  • the electrode terminal 220 is made of metal for leading electricity stored in the electrode body to the external space of the storage element 21 and for introducing electricity into the internal space of the storage element 21 to store the electricity in the electrode body. It is an electrode terminal made by One of the electrode terminals 220 (for example, the positive electrode side) may protrude from the end in the positive direction of the X-axis, and the other (for example, the negative electrode side) may protrude from the end in the negative direction of the X-axis.
  • the electrode terminal 220 is made of aluminum, aluminum alloy, copper, copper alloy, or the like.
  • the electrode terminals 220 are shown in a simplified state in which they only protrude from the container 210 in the negative direction of the X axis. It may be bent and connected (joined) to the electrode terminal 220 of the adjacent storage element 21 . Alternatively, the electrode terminals 220 may be electrically connected to the electrode terminals 220 of the adjacent storage elements 21 by being connected (joined) to a conductive member such as a bus bar. Thereby, the plurality of storage elements 21 are connected in series or in parallel.
  • the electrode terminals 220 of the energy storage elements 21 at the ends may extend to the external terminals of the energy storage device 1 and be connected (joined) to the external terminals, or may be connected (joined) to the external terminals by a conductive member such as a bus bar. may be electrically connected to
  • 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 Y-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 type (stacked) electrode body formed by stacking a plurality of flat plate-shaped electrode plates. or a bellows-shaped electrode body in which an electrode plate is folded into a bellows shape.
  • the housing portion 22 is a box-shaped (substantially rectangular parallelepiped) container (housing) that houses a plurality of power storage elements 21 and holds the plurality of power storage elements 21 .
  • the housing portion 22 has a first member 23 and a second member 24 assembled to the first member 23 and housing the plurality of power storage elements 21 together with the first member 23 .
  • the first member 23 and the second member 24 are arranged outside the plurality of storage elements 21, fix the plurality of storage elements 21 at predetermined positions, and protect them from impacts and the like. By holding the plurality of storage elements 21 by the first member 23 and the second member 24 , the plurality of storage elements 21 are fixed inside the first member 23 and the second member 24 .
  • the first member 23 and the second member 24 are joined together by adhesive, heat sealing, ultrasonic welding, screw fastening, or the like.
  • the first member 23 and the second member 24 may be made of the above-described resin material capable of forming the exterior body 10 .
  • the first member 23 and the second member 24 may be formed of a conductive member such as metal as long as the electrical insulation of the electric storage element 21 and the like is maintained.
  • the first member 23 is a bottomed rectangular cylindrical housing that is arranged in the positive Y-axis direction of the second member 24 and whose entire surface in the negative Y-axis direction is open.
  • the first member 23 has a pair of opposing first side wall portions 231 on both side surfaces in the X-axis direction, and a pair of opposing second side wall portions 232 on both side surfaces in the Z-axis direction. It has a bottom wall portion 233 on the positive direction side.
  • the first side wall portion 231 is a flat and rectangular wall portion parallel to the YZ plane that forms a short side surface (short side wall) of the first member 23, and is positioned to sandwich the plurality of power storage elements 21 in the X-axis direction. placed in The first side wall portion 231 is a wall portion adjacent to the second side wall portion 232 and the bottom wall portion 233 .
  • the second side wall portion 232 is a plate-like rectangular wall portion parallel to the XY plane that forms the long side surface (long side wall) of the first member 23, and is positioned to sandwich the plurality of power storage elements 21 in the Z-axis direction. placed in The second side wall portion 232 is a wall portion adjacent to the first side wall portion 231 and the bottom wall portion 233 .
  • the bottom wall portion 233 is a flat and rectangular wall portion that forms the bottom surface (bottom wall) of the first member 23 and is parallel to the XZ plane. , and abut against the storage element 21 .
  • the first side wall portion 231 arranged in the negative direction of the X-axis is provided with cutouts 234 that expose the electrode terminals 220 of the plurality of storage elements 21 .
  • a conductive path (not shown) that electrically connects the electrode terminal 220 of the storage element 21 at the end in the Y-axis positive direction and the external terminal 81 is arranged through the notch 234 .
  • the second member 24 is a bottomed rectangular cylindrical housing which is arranged in the negative Y-axis direction of the first member 23 and whose entire surface in the positive Y-axis direction is open.
  • the second member 24 has a pair of opposing first side wall portions 241 on both side surfaces in the X-axis direction, and a pair of opposing second side wall portions 242 on both side surfaces in the Z-axis direction. It has a bottom wall portion 243 on the negative direction side.
  • the first side wall portion 241 is a flat and rectangular wall portion parallel to the YZ plane that forms a short side surface (short side wall) of the second member 24, and is positioned to sandwich the plurality of power storage elements 21 in the X-axis direction. placed in The first side wall portion 241 is a wall portion adjacent to the second side wall portion 242 and the bottom wall portion 243 .
  • the second side wall portion 242 is a plate-like and rectangular wall portion parallel to the XY plane that forms the long side surface (long side wall) of the second member 24, and is positioned to sandwich the plurality of power storage elements 21 in the Z-axis direction. placed in The second side wall portion 242 is a wall portion adjacent to the first side wall portion 241 and the bottom wall portion 243 .
  • the bottom wall portion 243 is a flat and rectangular wall portion that forms the bottom surface (bottom wall) of the second member 24 and is parallel to the XZ plane. , and abut against the storage element 21 .
  • the outer surface of the bottom wall portion 243 (the surface facing the Y-axis minus direction) is the mounting surface 25 on which the plurality of bus bars 33, the fuses 34, and the control board 35 are mounted.
  • the mounting surface 25 is provided with a plurality of boss portions 26 to which the control board 35 is screwed, a fuse mounting portion 27 to which the fuses 34 are mounted, and a plurality of busbar mounting portions 28 to which the busbars 33 are individually mounted. ing.
  • boss portions 26 protrude from the mounting surface 25 in the Y-axis negative direction, and screw holes are formed in the central portions of the tip surfaces thereof. Although any number of boss portions 26 may be provided, three boss portions 26 are provided in the present embodiment, and are referred to as boss portions 26a, 26b, and 26c, respectively.
  • the boss portion 26a is arranged in the vicinity of the edge of the mounting surface 25 in the negative direction of the X-axis and substantially in the middle in the Z-axis direction.
  • the boss portion 26b is located near the negative direction of the X-axis on the mounting surface 25 and near the corner portion near the negative direction of the Z-axis.
  • the boss portion 26c is located on the attachment surface 25 toward the plus direction of the X-axis and substantially in the middle in the Z-axis direction.
  • the fuse mounting portions 27 are arranged in the vicinity of the edge of the mounting surface 25 in the positive direction of the X-axis, and are arranged in pairs with a predetermined interval in the Z-axis direction.
  • the fuse mounting portion 27 has a screw hole, and holds the fuse 34 by screwing a bolt passing through the fuse 34 into the screw hole.
  • the plurality of busbar mounting portions 28 are portions that hold different busbars 33, respectively. Although the number of busbar mounting portions 28 to be installed is arbitrary, three busbar mounting portions 28 are provided in the present embodiment, and are referred to as busbar mounting portions 28a, 28b, and 28c, respectively.
  • the busbar mounting portion 28a is arranged near the edge of the mounting surface 25 in the negative direction of the X-axis and substantially in the center in the Z-axis direction.
  • the busbar attachment portion 28a holds a busbar (not shown) joined (connected) to the electrode terminals 220 of the storage elements 21 at the ends in the Y-axis negative direction.
  • the busbar mounting portion 28a has a screw hole, and the busbar is held by screwing a bolt passing through the busbar into the screw hole.
  • the busbar mounting portion 28b is arranged on the mounting surface 25 closer to the positive direction of the X axis and closer to the positive direction of the Z axis.
  • the busbar attachment portion 28b holds a busbar 33b that is joined (connected) to the external terminal 81 arranged in the positive direction of the X-axis and joined (connected) to the fuse 34 .
  • the busbar mounting portion 28c is arranged on the mounting surface 25 at a position closer to the negative direction of the X-axis and closer to the positive direction of the Z-axis.
  • the busbar attachment portion 28c holds the busbar 33c joined (connected) to the external terminal 81 arranged in the negative direction of the X-axis among the pair of external terminals 81 .
  • each external terminal 81 is integrated with the resin material forming the lid 12 by insert molding. That is, a part of each external terminal 81 is in direct contact with the resin material forming the lid 12, and is integrated while being covered with the resin material.
  • FIG. 4 is a perspective view showing an integrated structure of the external terminal 81 and the lid body 12 according to the embodiment.
  • FIG. 4 shows a state in which the bus bar 33 connected to each external terminal 81 and the small lid 125 are omitted.
  • 5 and 6 are perspective views showing the external terminal 81 according to the embodiment.
  • 5 and 6 are perspective views of the external terminal 81 viewed from different directions.
  • the external terminal 81 is made 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. Specifically, as shown in FIGS. 4 to 6, the external terminal 81 is made of sheet metal and has a fastening portion 82, an extension portion 83, and a bent portion 84. As shown in FIGS.
  • the fastening portion 82 is a portion formed in an inverted U shape when viewed in the X-axis direction, and a portion thereof protrudes from the lid body 12 in the positive Z-axis direction.
  • a portion of the fastening portion 82 protruding from the lid body 12 has a pair of side wall portions 821 and 822 facing each other in the Y-axis direction, and a top surface portion 823 connecting the pair of side wall portions 821 and 822 .
  • Each of the side wall portions 821 and 822 is a flat plate portion parallel to the XZ plane, and has circular mounting holes 821a and 822a passing through in the Y-axis direction.
  • the top surface portion 823 is a flat plate portion parallel to the XY plane, and has a circular mounting hole 823a penetrating in the Z-axis direction.
  • One of the side wall portions 821 and 822 and the top surface portion 823 is provided with an external conductor (such as a busbar or cable: not shown) connected to an external device so that it is fastened through each mounting hole 821a, 822a, 823a. It has become.
  • the fastening between the side wall portions 821 and 822 and the top surface portion 823 and the external conductor includes crimping, screwing, and the like.
  • the fastening portion 82 is provided with a base portion 824 extending from the lower end portion of the side wall portion 821 in the Y-axis negative direction.
  • the base portion 824 is a portion extending downward from the lower end portion of the side wall portion 821 in parallel with the XZ plane while maintaining the same thickness as the side wall portion 821 .
  • the base 824 is embedded in the lid 12 .
  • the base portion 824 is provided with a pair of circular through holes 824a penetrating in the Y-axis direction and arranged side by side in the X-axis direction.
  • the fastening portion 82 is provided with a facing portion 825 extending from the lower end portion of the side wall portion 822 in the positive Y-axis direction.
  • the opposing portion 825 is a portion that faces the base portion 824 in the Y-axis direction, and extends in a plate shape downward from the lower end portion of the side wall portion 822 so as to be inclined in the positive Y-axis direction.
  • the facing portion 825 is embedded in the lid 12 .
  • the opposing portion 825 is provided with a pair of circular through-holes 825a penetrating in the Y-axis direction and arranged side by side in the X-axis direction.
  • the extension part 83 is a part embedded in the lid body 12 and extending from the base part 824 .
  • the extension part 83 is a plate-like part elongated in the X-axis direction, and has the same thickness as that of the base part 824. It extends in a direction (X-axis plus direction) that intersects the projecting direction. That is, the main surface of the extension portion 83 in the positive Y-axis direction is flush with the main surface of the base portion 824 in the positive Y-axis direction, and the main surface of the extension portion 83 in the negative Y-axis direction is the Y-axis direction of the base portion 824 . It is flush with the main surface in the negative direction of the axis.
  • extension portion 83 extends on the same plane as the base portion 824 of the fastening portion 82 (the chain double-dashed line L1 in FIG. 10). No step is formed at the boundary between the extension portion 83 and the base portion 824 .
  • the bent portion 84 is a portion bent from the upper end portion of the end portion of the extended portion 83 in the positive direction of the X axis.
  • the bent portion 84 is a flat plate portion parallel to the XY plane, and has a circular mounting hole 84a penetrating in the Z-axis direction.
  • the bent portion 84 is housed in the housing recess 121 of the lid 12, and the busbar 33 is fastened through the mounting hole 84a.
  • the fastening between the bent portion 84 and the bus bar 33 may be caulking, screwing, or the like.
  • FIG. 7 is a diagram of the lid 12 and the external terminals 81 cut along a cut plane including line VII-VII in FIG.
  • FIG. 8 is a diagram of the lid 12 and the external terminal 81 cut along a cut plane including line VIII-VIII in FIG.
  • FIG. 9 is a diagram of the lid 12 and the external terminals 81 cut along a cut plane including line IX-IX in FIG.
  • FIG. 10 is a diagram of the lid 12 and the external terminals 81 cut along the line XX in FIG.
  • the lid 12 has a rectangular frame-shaped frame wall portion 122 surrounding the opening 111 of the exterior body portion 11 from the outside.
  • a portion of the external terminal 81 is embedded in the side portion 123 of the frame wall portion 122 in the negative Y-axis direction.
  • the base portion 824 and the extension portion 83 of the fastening portion 82 are embedded in the side portion 123 .
  • a main surface of the base portion 824 in the positive Y-axis direction is exposed from the side portion 123 .
  • a main surface of the extending portion 83 in the positive Y-axis direction and a portion of the upper end surface are exposed from the side portion 123 .
  • Portions of the base portion 824 and the extension portion 83 that are not exposed from the side portion 123 are embedded in the side portion 123 .
  • the main surface of the elongated portion 83 in the Y-axis negative direction and the lower end surface of the elongated portion 83 are embedded in the side portion 123 .
  • the external terminal 81 is integrated with the resin material forming the cover 12 by insert molding, so that the portion of the base portion 824 and the extension portion 83 embedded in the side portion 123 is formed of the resin material. Directly adhered and joined.
  • the base portion 824 and the extension portion 83 are the first main surface in which the entire main surface of the Y-axis minus direction in the extension direction (X-axis direction) of the extension portion 83 is embedded in the lid body 12 by insert molding. It is the insert portion 91 . Since the first insert portion 91 is provided not only on the base portion 824 of the fastening portion 82 but also on the extension portion 83, the contact area between the external terminal 81 and the lid body 12 is widened.
  • the main surface of the base portion 824 and the extension portion 83 in the negative Y-axis direction in the X-axis direction is the first insert portion 91, so that the external terminal 81 and the lid body 12 are in close contact with each other.
  • the area is made wider. 4 and 10, the first insert portion 91 is arranged along the outer surface of the side portion 123.
  • the heat of the external terminal 81 can be radiated outward from the outer surface of the side portion 123 . From the viewpoint of heat dissipation, it is preferable that the distance S (see FIG.
  • the interval S should be 80% or more and 120% or less of the thickness of the first insert portion 91 (base portion 824 or extension portion 83).
  • a side portion 124 of the frame wall portion 122 in the negative direction of the X-axis and an end portion in the negative direction of the Y-axis is provided with a side portion 123 of the frame wall portion 122 in the negative direction of the Y-axis.
  • a beam portion 126 facing the is provided.
  • the beam portion 126 is a prismatic portion extending in the X-axis direction.
  • a facing portion 825 of the external terminal 81 is embedded in the beam portion 126 . Both end surfaces in the X-axis direction, both main surfaces in the Y-axis direction, and a lower end surface of the facing portion 825 are embedded in the beam portion 126 , and are in direct contact with the resin material forming the lid 12 .
  • the facing portion 825 is the second insert portion 92 that is entirely embedded in the lid 12 by insert molding.
  • the external terminal 81 is provided with the second insert portion 92 in addition to the first insert portion 91 , so that the contact area between the external terminal 81 and the lid body 12 is further widened.
  • a resin material forming the lid 12 (part of the lid 12) is placed in the through holes 824a and 825a of the base portion 824 and the facing portion 825. As shown in FIG. Specifically, the resin material is filled in the through-holes 824a and 825a and adheres to the inner peripheral surfaces of the through-holes 824a and 825a.
  • the base portion 824 and the extension portion 83 of the fastening portion 82 of the external terminal 81 have the first insert portion 91 embedded in the lid body 12 by insert molding.
  • the base portion 824 of the fastening portion 82 and the extension portion 83 can disperse the stress received when the conductor is fastened to the fastening portion 82 over a wide range in the lid body 12 .
  • the extension portion 83 extends on the same plane as the base portion 824 of the fastening portion 82, the resin material can flow smoothly during insert molding.
  • one of the pair of principal surfaces (the principal surface in the Y-axis negative direction), which is the entirety in the extension direction (X-axis direction), is the first insert. Since it is the portion 91 , the stress acting upon fastening can be dispersed over a wider range in the lid body 12 . Therefore, the torque resistance performance of the external terminals 81 can be further enhanced, and damage to the external terminals 81 can be more reliably suppressed.
  • the facing portion 825 facing the base portion 824 of the external terminal 81 has the second insert portion 92 embedded in the lid body 12 by insert molding, stress during fastening is transferred to the lid via the second insert portion 92 . Dispersible in body 12 . As a result, the torque resistance performance of the external terminals 81 can be further enhanced, and damage to the external terminals 81 can be suppressed more reliably.
  • the second insert portion 92 does not exist, the base portion 824 of the fastening portion 82 and the portion of the fastening portion 82 protruding from the lid body 12 may be twisted and damaged at the boundary portion during fastening.
  • the second insert portion 92 receives stress during fastening at a position facing the base portion 824 of the fastening portion 82, so that the fastening portion 82 as a whole is prevented from twisting. Therefore, the torsion at the boundary portion described above is also suppressed, and damage at the boundary portion can be suppressed.
  • the rotation of the entire external terminal 81 can be restricted by the part of the lid 12. Therefore, the integrity between the external terminal 81 and the lid 12 can be enhanced, the torque resistance performance of the external terminal 81 can be enhanced, and damage to the external terminal 81 can be suppressed more reliably.
  • the rotation of the entire external terminal 81 can be restricted by the part of the lid 12. Therefore, the integrity between the external terminal 81 and the lid 12 can be further improved, and the torque resistance performance of the external terminal 81 can be further improved.
  • the first insert portion 91 is arranged along the outer surface of the lid 12 , the heat of the external terminals 81 can be released outward from the outer surface of the lid 12 . In other words, even if the torque resistance performance is enhanced by providing the first insert portion 91 , it is possible to prevent heat from being trapped inside the exterior body 10 .
  • the first insert portion 91 includes the tip surface (the end surface in the positive direction of the X axis) of the extension portion 83, the stress can be dispersed in the lid body 12 even on the tip surface, and the stress acting during fastening can be distributed over a wider range. It can be dispersed in the lid 12 .
  • the tip surface is a surface facing in a different direction from the main surface of the extended portion 83, stress in a direction different from the stress acting on the main surface acts on the tip surface. In other words, stresses in various directions can be dispersed in the lid body 12, so that the torque resistance performance of the external terminals 81 can be further enhanced.
  • the opposing portion 825 extends downward from the lower end of the side wall portion 822 so as to be inclined in the positive Y-axis direction, the inclination of the opposing portion 825 prevents the second insert from the force acting in the vertical direction (Z-axis direction).
  • the strength of the portion 92 can be increased. Therefore, damage to the external terminals 81 can be further suppressed.
  • FIG. 11 is a bottom view showing the extension part 83b and the base part 824b of the external terminal 81B according to Modification 1.
  • FIG. 11 a step is formed at the boundary between the extension portion 83b and the base portion 824b. It is In this case, since the thickness of one of the extension portion 83b and the base portion 824b overlaps the thickness of the other, the step is not so large. Therefore, even in this case, the flow of the resin material during insert molding is less likely to be hindered, and the impact received by the resin material on the external terminals 81B during insert molding can be suppressed.
  • the case where the base 824 of the fastening portion 82 and the extending portion 83 in the extending direction is entirely the first insert portion 91 has been exemplified.
  • the extension direction only a portion of each of the base portion 824 and the extension portion 83 may be the first insert portion.
  • the facing portion 825 of the external terminal 81 has the second insert portion 92 , but the facing portion 825 does not have to be embedded in the lid 12 .
  • first insert part 91 and the second insert part 92 each have the through holes 824a, 825a through which a part of the lid body 12 is arranged is exemplified.
  • the through-hole may have a shape other than circular, such as elliptical or polygonal.
  • the first insert portion 91 is arranged along the outer surface of the lid body 12 in the embodiment.
  • the first insert portion 91 does not have to be arranged along the outer surface of the lid 12 .
  • the first insert may be embedded in a beam protruding inward from the side of the lid.
  • the first insert portion 91 includes the front end surface of the extension portion 83 (the end surface in the positive direction of the X-axis), but the front end surface of the extension portion 83 is exposed from the lid body 12. You may have
  • the main surface of the base portion 824 in the positive Y-axis direction and the main surface of the extension portion 83 in the positive Y-axis direction are exposed from the side portion 123 .
  • the main surface of the base portion in the positive Y-axis direction and the main surface of the extension portion in the positive Y-axis direction may be embedded in the side portion.
  • each of the pair of main surfaces of the base portion and the extension portion of the fastening portion may be the first insert portion 91 as a whole in the extension direction (X-axis direction).
  • the present invention can be applied to a power storage device having a power storage element such as a lithium ion secondary battery.

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Abstract

A power storage device (1) includes: a power storage element (21); an exterior body (10) for containing the power storage element (21); and a conductive member (81) for electrically connecting an external device disposed outside the exterior body (10) and the power storage element (21). The exterior body (10) includes: an exterior body (11) for containing the power storage element (21); and a lid (12) for blocking the exterior body (11) and holding the conductive member (81). The conductive member (81) includes: a fastening part (82) that projects from the lid (12) and to which an external conductor connected to the external device is fastened; and an extending part (83) that extends from a base (824) of the fastening part (82) in a direction (x-axis direction) that crosses the projection direction (z-axis direction) of the fastening part (82), the extending part (83) extending in the same plane as the base (824). The base (824) of the fastening part (82) and the extending part (83) have a first insert part (91) embedded in the lid (12) by the insert molding.

Description

蓄電装置power storage device
　本発明は、蓄電素子と外装体とを備える蓄電装置に関する。 The present invention relates to a power storage device that includes a power storage element and an exterior body.
　従来、蓄電装置においては、外装体の一部である蓋体に接続溝が形成されており、この接続溝に対して、端子（導電部材）に備わる接続インサートブロックが係止されることで、当該端子が固定されたものが知られている。 Conventionally, in a power storage device, a connection groove is formed in a lid, which is a part of an exterior body. A device in which the terminal is fixed is known.
特開２０２０－０５７５９１号公報JP 2020-057591 A
　上記従来の蓄電装置では、外部機器に接続された外部導電体を、導電部材に締結する際には導電部材に対して応力が局所的に集中し、当該導電部材が損傷するおそれがある。 In the above conventional power storage device, when an external conductor connected to an external device is fastened to a conductive member, stress is locally concentrated on the conductive member, which may damage the conductive member.
　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、外部導電体を導電部材に締結する際の、導電部材の損傷を抑制できる蓄電装置の提供を目的とする。 SUMMARY OF THE INVENTION The present invention was made by the inventors of the present invention by newly paying attention to the above problem, and an object of the present invention is to provide a power storage device capable of suppressing damage to a conductive member when an external conductor is fastened to the conductive member. .
　本発明の一態様に係る蓄電装置は、蓄電素子と、蓄電素子を収容する外装体と、外装体の外部に配置された外部機器と蓄電素子とを電気的に接続するための導電部材とを備えている。外装体は、蓄電素子を収容する外装本体部と、外装本体部を閉塞するとともに導電部材を保持する蓋体とを備えている。導電部材は、蓋体から突出し、外部機器に接続された外部導電体が締結される締結部と、締結部の基部から当該締結部の突出方向とは交差する方向に当該基部と同一平面上に延設する延設部とを備えている。締結部の基部及び延設部は、蓋体にインサート成形により埋設された第一インサート部を有する。 A power storage device according to an aspect of the present invention includes a power storage element, an exterior body that houses the power storage element, and a conductive member that electrically connects an external device arranged outside the exterior body to the power storage element. I have. The exterior body includes an exterior main body that houses the storage element, and a lid that closes the exterior main body and holds the conductive member. The conductive member protrudes from the lid, and is on the same plane as the fastening portion to which the external conductor connected to the external device is fastened, and the base portion of the fastening portion in a direction intersecting the projecting direction of the fastening portion. and an extension part that extends. The base portion and extension portion of the fastening portion have a first insert portion embedded in the lid by insert molding.
　本発明における蓄電装置によれば、外部導電体を導電部材に締結する際の、導電部材の損傷を抑制できる。 According to the power storage device of the present invention, it is possible to suppress damage to the conductive member when fastening the external conductor to the conductive member.
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ユニットの概略構成を示す分解斜視図である。FIG. 3 is an exploded perspective view showing a schematic configuration of the power storage unit according to the embodiment. 図４は、実施の形態に係る外部端子と蓋体との一体構造を示す斜視図である。FIG. 4 is a perspective view showing an integrated structure of an external terminal and a lid according to the embodiment. 図５は、実施の形態に係る外部端子を示す斜視図である。FIG. 5 is a perspective view showing an external terminal according to the embodiment. 図６は、実施の形態に係る外部端子を示す斜視図である。FIG. 6 is a perspective view showing an external terminal according to the embodiment. 図７は、実施の形態に係る蓋体と外部端子との一体構造を示す断面斜視図である。FIG. 7 is a cross-sectional perspective view showing an integrated structure of a lid body and an external terminal according to the embodiment. 図８は、実施の形態に係る蓋体と外部端子との一体構造を示す断面斜視図である。FIG. 8 is a cross-sectional perspective view showing an integrated structure of a lid body and an external terminal according to the embodiment. 図９は、実施の形態に係る蓋体と外部端子との一体構造を示す断面斜視図である。FIG. 9 is a cross-sectional perspective view showing the integral structure of the lid body and the external terminal according to the embodiment. 図１０は、実施の形態に係る蓋体と外部端子との一体構造を示す断面斜視図である。FIG. 10 is a cross-sectional perspective view showing the integral structure of the lid body and the external terminal according to the embodiment. 図１１は、変形例１に係る外部端子の延設部及び基部を示す下面図である。FIG. 11 is a bottom view showing an extension portion and a base portion of an external terminal according to Modification 1. FIG.
　本発明の一態様に係る蓄電装置は、蓄電素子と、蓄電素子を収容する外装体と、外装体の外部に配置された外部機器と蓄電素子とを電気的に接続するための導電部材とを備えている。外装体は、蓄電素子を収容する外装本体部と、外装本体部を閉塞するとともに導電部材を保持する蓋体とを備えている。導電部材は、蓋体から突出し、外部機器に接続された外部導電体が締結される締結部と、締結部の基部から当該締結部の突出方向とは交差する方向に当該基部と同一平面上に延設する延設部とを備えている。締結部の基部及び延設部は、蓋体にインサート成形により埋設された第一インサート部を有する。 A power storage device according to an aspect of the present invention includes a power storage element, an exterior body that houses the power storage element, and a conductive member that electrically connects an external device arranged outside the exterior body to the power storage element. I have. The exterior body includes an exterior main body that houses the storage element, and a lid that closes the exterior main body and holds the conductive member. The conductive member protrudes from the lid, and is on the same plane as the fastening portion to which the external conductor connected to the external device is fastened, and the base portion of the fastening portion in a direction intersecting the projecting direction of the fastening portion. and an extension part that extends. The base portion and extension portion of the fastening portion have a first insert portion embedded in the lid by insert molding.
　これによれば、導電部材の締結部の基部と延設部とが蓋体にインサート成形で埋設された第一インサート部を有するので、外部導電体を締結部に締結する際に受ける応力を締結部の基部と延設部とで広範囲にわたって蓋体に分散できる。特に、延設部は、締結部の基部と同一平面上に延設しているので、インサート成形時の樹脂材料の流れをスムーズにできる。このため、インサート成形時に導電部材が樹脂材料から受ける衝撃を抑制でき、導電部材の位置ずれを抑制できる。これにより、導電部材の位置ずれを抑制しつつ、締結時における応力集中を抑制でき、導電部材の耐トルク性能を高めることが可能である。したがって、外部導電体を導電部材に締結する際の、導電部材の損傷を抑制できる。 According to this, since the base portion and extension portion of the fastening portion of the conductive member have the first insert portion embedded in the cover body by insert molding, the stress received when fastening the external conductor to the fastening portion is reduced. It can be dispersed over a wide area on the lid at the base and extension of the part. In particular, since the extended portion extends on the same plane as the base portion of the fastening portion, the resin material can flow smoothly during insert molding. Therefore, it is possible to suppress the impact that the conductive member receives from the resin material at the time of insert molding, and it is possible to suppress the displacement of the conductive member. As a result, stress concentration during fastening can be suppressed while suppressing displacement of the conductive member, and the torque resistance performance of the conductive member can be enhanced. Therefore, damage to the conductive member can be suppressed when fastening the external conductor to the conductive member.
　締結部の基部及び延設部は、当該延設部の延設方向における全体が第一インサート部である、としてもよい。 The base portion and the extension portion of the fastening portion may be the first insert portion as a whole in the extension direction of the extension portion.
　これによれば、締結部の基部及び前記延設部では延設方向における全体が第一インサート部であるので、締結時に作用する応力をより広範囲にわたって蓋体に分散できる。したがって、導電部材の耐トルク性能をより高めることができ、導電部材の損傷をより確実に抑制できる。 According to this, since the base portion of the fastening portion and the extension portion are the first insert portion as a whole in the extension direction, the stress that acts upon fastening can be distributed over a wider range to the lid body. Therefore, the torque resistance performance of the conductive member can be further enhanced, and damage to the conductive member can be suppressed more reliably.
　導電部材は、前記基部に対向する対向部を有し、対向部は、蓋体にインサート成形により埋設された第二インサート部を有する、としてもよい。 The conductive member may have a facing portion facing the base portion, and the facing portion may have a second insert portion embedded in the lid by insert molding.
　これによれば、基部に対向する対向部が蓋体にインサート成形で埋設された第二インサート部を有しているので、締結時の応力を、第二インサート部を介して蓋体に分散できる。これにより、導電部材の耐トルク性能をより高めることができ、導電部材の損傷をより確実に抑制できる。 According to this, since the facing portion facing the base portion has the second insert portion embedded in the lid body by insert molding, the stress at the time of fastening can be dispersed to the lid body via the second insert portion. . As a result, the torque resistance performance of the conductive member can be further enhanced, and damage to the conductive member can be suppressed more reliably.
　ここで、第二インサート部が存在しない場合、締結時では、締結部の基部と、締結部において蓋体から突出した部分とが境界部分で捻られ損傷するおそれもある。しかしながら、本態様では、第二インサート部が、締結部の基部に対向した位置で応力を受けるので、締結部全体としての捻れが抑制される。したがって、前述した境界部分での捻れも抑制され、当該境界部分での損傷を抑制できる。 Here, if the second insert part does not exist, the base of the fastening part and the part of the fastening part protruding from the lid may be twisted and damaged at the boundary during fastening. However, in this aspect, since the second insert receives stress at a position facing the base of the fastening portion, twisting of the fastening portion as a whole is suppressed. Therefore, the torsion at the boundary portion described above is also suppressed, and damage at the boundary portion can be suppressed.
　第一インサート部は、貫通孔を有しており、当該貫通孔内に蓋体の一部が配置されている、としてもよい。 The first insert part may have a through hole, and a part of the lid body may be arranged in the through hole.
　これによれば、第一インサート部に設けられた貫通孔内に蓋体の一部が配置されているので、当該蓋体の一部によって導電部材全体の回転を規制できる。したがって、導電部材と蓋体との一体性を高めることができ、導電部材の耐トルク性能を高めることができ、導電部材の損傷をより確実に抑制できる。 According to this, since a part of the lid is arranged in the through hole provided in the first insert portion, the rotation of the entire conductive member can be restricted by the part of the lid. Therefore, the integrity between the conductive member and the lid can be enhanced, the torque resistance performance of the conductive member can be enhanced, and damage to the conductive member can be more reliably suppressed.
　第一インサート部は、蓋体の外面に沿って配置されている、としてもよい。 The first insert part may be arranged along the outer surface of the lid.
　これによれば、第一インサート部が蓋体の外面に沿って配置されているので、当該蓋体の外面から外方に向けて導電部材の熱を放出できる。つまり、第一インサート部を設けることで耐トルク性能を高めたとしても、外装体の内部に熱が籠もることを抑制できる。 According to this, since the first insert portion is arranged along the outer surface of the lid, the heat of the conductive member can be radiated outward from the outer surface of the lid. That is, even if the torque resistance performance is improved by providing the first insert portion, it is possible to suppress the heat from being trapped inside the exterior body.
　第一インサート部は、延設部の先端面を含む、としてもよい。 The first insert part may include the tip surface of the extension part.
　これによれば、第一インサート部に延設部の先端面が含まれているので、当該先端面でも蓋体に応力を分散でき、締結時に作用する応力をより広範囲にわたって蓋体に分散でき、導電部材の損傷をより確実に抑制できる。 According to this, since the first insert part includes the tip surface of the extension part, the stress can be dispersed to the lid even with the tip surface, and the stress acting at the time of fastening can be dispersed to the lid over a wider range, Damage to the conductive member can be suppressed more reliably.
　特に、先端面は、延設部において主面とは異なる方向を向く面であるので、主面に作用する応力とは異なる方向の応力が先端面に作用することになる。つまり、多様な方向の応力を蓋体に分散できるので、導電部材の耐トルク性能をより高めることができる。 In particular, since the tip surface is a surface facing in a different direction from the main surface in the extended portion, stress in a direction different from the stress acting on the main surface acts on the tip surface. In other words, stresses in various directions can be dispersed in the lid, so that the torque resistance performance of the conductive member can be further enhanced.
　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などは、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。 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, constituent elements, arrangement positions of constituent elements, connection forms, 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.
　以下の説明及び図面中において、蓄電装置に備わる蓄電素子の電極端子の突出方向をＸ軸方向と定義する。また、複数の蓄電素子の並び方向をＹ軸方向と定義する。蓄電装置の外装体における本体部と蓋体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（以下実施の形態及びその変形例では、直交）する方向である。なお、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。また、以下の説明において、Ｘ軸プラス方向とは、Ｘ軸の矢印方向側を示し、Ｘ軸マイナス方向とは、Ｘ軸プラス方向とは反対側を示す。Ｙ軸方向及びＺ軸方向についても同様である。さらに、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。２つの方向が直交している、とは、当該２つの方向が完全に直交していることを意味するだけでなく、実質的に直交していること、すなわち、数％程度の差異を含むことも意味する。 In the following description and drawings, the protruding direction of the electrode terminals of the storage elements provided in the storage device is defined as the X-axis direction. Also, the direction in which the plurality of storage elements are arranged is defined as the Y-axis direction. The direction in which the main body and the lid are arranged in the exterior body of the power storage device or the vertical direction is defined as the Z-axis direction. These X-axis direction, Y-axis direction, and Z-axis direction are directions that intersect each other (in the following embodiments and modifications thereof, they are orthogonal). Although the Z-axis direction may not be the vertical direction depending on the mode of use, the Z-axis direction will be described below for convenience of explanation. Further, 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 side opposite to the positive direction of the X-axis. The same applies to the Y-axis direction and the Z-axis direction. Furthermore, expressions indicating relative directions or orientations such as parallel and orthogonal include cases where they are not strictly the directions or orientations. Two directions are orthogonal, not only means that the two directions are completely orthogonal, but also substantially orthogonal, that is, including a difference of about several percent also means
　［蓄電装置の全般的な説明］
　図１及び図２を用いて、実施の形態に係る蓄電装置１の全般的な説明を行う。図１は、実施の形態に係る蓄電装置１の外観を示す斜視図である。図２は、実施の形態に係る蓄電装置１を分解した場合の各構成要素を示す分解斜視図である。 [General description of power storage device]
A general description of a power storage device 1 according to an embodiment will be given with reference to FIGS. 1 and 2. FIG. FIG. 1 is a perspective view showing the appearance of a power storage device 1 according to an embodiment. FIG. 2 is an exploded perspective view showing each component when the power storage device 1 according to the embodiment is exploded.
　蓄電装置１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。蓄電装置１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１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、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１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 1 is a device that can charge electricity from the outside and discharge electricity to the outside, and has a substantially rectangular parallelepiped shape in the present embodiment. The power storage device 1 is a battery module (assembled battery) used for power storage, power supply, or the like. Specifically, the power storage device 1 is a battery for driving mobile bodies such as automobiles, motorcycles, water crafts, ships, snowmobiles, agricultural machinery, construction machinery, railroad vehicles for electric railways, or for starting engines. used as 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 1 can also be used as a stationary battery or the like for home or business use.
　図１及び図２に示すように、蓄電装置１は、蓄電ユニット２０と、蓄電ユニット２０を収容する外装体１０とを備えている。外装体１０は、蓄電ユニット２０を収容する外装本体部１１と、蓄電ユニット２０の上方を覆う蓋体１２とを有する。 As shown in FIGS. 1 and 2 , the power storage device 1 includes a power storage unit 20 and an exterior body 10 that accommodates the power storage unit 20 . The exterior body 10 has an exterior main body 11 that accommodates the power storage unit 20 and a lid body 12 that covers the top of the power storage unit 20 .
　外装体１０は、蓄電装置１の外装体を構成する矩形状（箱状）の容器（モジュールケース）である。つまり、外装体１０は、蓄電ユニット２０等を所定の位置に固定し、これら要素を衝撃などから保護する部材である。 The exterior body 10 is a rectangular (box-shaped) container (module case) that constitutes the exterior body of the power storage device 1 . In other words, the exterior body 10 is a member that fixes the power storage unit 20 and the like to predetermined positions and protects these elements from impacts and the like.
　外装本体部１１は、上部が開放された有底矩形筒状の部材であり、その開放部分が開口部１１１である。開口部１１１は、平面視において略四角形状である。外装本体部１１は、Ｘ軸方向両側の側面に２つの第一壁部１１２を有し、Ｙ軸方向両側の側面に２つの第二壁部１１３を有し、Ｚ軸マイナス方向側に第三壁部１１４を有している。具体的には、第一壁部１１２は、外装本体部１１の短側面を形成する矩形状かつ板状の短側面部である。第二壁部１１３は、外装本体部１１の長側面を形成する矩形状かつ板状の長側面部である。第三壁部１１４は、外装本体部１１の底面を形成する矩形状かつ板状の底壁部である。 The exterior main body 11 is a bottomed rectangular tubular member with an open top, and the open portion is the opening 111 . The opening 111 has a substantially rectangular shape in plan view. The exterior main body 11 has two first wall portions 112 on both side surfaces in the X-axis direction, two second wall portions 113 on both side surfaces in the Y-axis direction, and a third wall portion 113 on the negative Z-axis direction side. It has a wall portion 114 . Specifically, the first wall portion 112 is a rectangular plate-like short side surface portion that forms the short side surface of the exterior main body portion 11 . The second wall portion 113 is a rectangular plate-like long side surface that forms the long side surface of the exterior body portion 11 . The third wall portion 114 is a rectangular plate-like bottom wall portion that forms the bottom surface of the exterior main body portion 11 .
　外装本体部１１の開口部１１１内には、蓄電ユニット２０に加えて、蓄電ユニット２０に保持された複数のバスバー３３、ヒューズ３４及び制御基板３５が収容されている。 In the opening 111 of the exterior main body 11, in addition to the power storage unit 20, a plurality of bus bars 33 held by the power storage unit 20, the fuse 34, and the control board 35 are accommodated.
　蓋体１２は、外装本体部１１の開口部１１１を閉塞する部材であり、外装本体部１１の開口部１１１を覆った状態で外装本体部１１に接合されている。蓋体１２は、Ｘ軸方向の両端部であって、Ｙ軸マイナス方向の上側の角部が窪んでおり、その一対の角部内に一対（正極側及び負極側）の外部端子８１が配置されている。蓋体１２において、前記一対の角部間には、各外部端子８１の一部が収容された収容凹部１２１が形成されており、この収容凹部１２１は、小蓋１２５により閉塞されている。蓄電装置１の製造時には、収容凹部１２１は開放されており、各外部端子８１の一部と、当該外部端子８１に対応するバスバー３３とが締結されて接続された後に、小蓋１２５により収容凹部１２１が閉塞される。小蓋１２５は、収容凹部１２１に対して着脱自在に接合されていればよいが、接着剤または溶着などにより固定されてもよい。 The lid 12 is a member that closes the opening 111 of the exterior main body 11 , and is joined to the exterior main body 11 while covering the opening 111 of the exterior main body 11 . The lid body 12 has both ends in the X-axis direction, and upper corners in the negative direction of the Y-axis are recessed, and a pair of external terminals 81 (positive electrode side and negative electrode side) are arranged in the pair of corners. ing. A housing recess 121 in which a part of each external terminal 81 is housed is formed between the pair of corners of the lid 12 , and the housing recess 121 is closed by a small lid 125 . When power storage device 1 is manufactured, accommodation recess 121 is open, and after part of each external terminal 81 and bus bar 33 corresponding to external terminal 81 are fastened and connected, the accommodation recess is closed by small lid 125 . 121 is blocked. The small lid 125 may be detachably joined to the housing recess 121, but may be fixed by adhesive or welding.
　外部端子８１は、複数のバスバー３３、ヒューズ３４及び制御基板３５を介して、蓄電ユニット２０に含まれる複数の蓄電素子２１と電気的に接続されている。蓄電装置１は、この外部端子８１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。外部端子８１は、真鍮などの銅合金、銅、アルミニウム、アルミニウム合金等の金属製の導電部材で形成されている。外部端子８１は、外装体１０の外部に配置された外部機器と各蓄電素子２１とを電気的に接続するための導電部材の一例である。 The external terminal 81 is electrically connected to the plurality of power storage elements 21 included in the power storage unit 20 via the plurality of bus bars 33 , fuses 34 and control board 35 . Power storage device 1 charges electricity from the outside and discharges electricity to the outside through this external terminal 81 . The external terminal 81 is made of a metal conductive member such as a copper alloy such as brass, copper, aluminum, or an aluminum alloy. The external terminal 81 is an example of a conductive member for electrically connecting an external device arranged outside the exterior body 10 and each storage element 21 .
　各バスバー３３は、外部端子８１と蓄電素子２１とを電気的に接続する板状部材である。各バスバー３３は、銅、銅合金、アルミニウム、アルミニウム合金等の金属製の導電部材で形成されている。 Each bus bar 33 is a plate-shaped member that electrically connects the external terminal 81 and the storage element 21 . Each bus bar 33 is made of a conductive member made of metal such as copper, copper alloy, aluminum, or aluminum alloy.
　ヒューズ３４は、定格以上の大電流から制御基板３５及び複数の蓄電素子２１等を保護する部材である。ヒューズ３４は、定格以上の電流が流れると溶断することで電流の流れを遮断する。 The fuse 34 is a member that protects the control board 35, the plurality of storage elements 21, etc. from a large current exceeding the rating. The fuse 34 cuts off the flow of current by melting when a current exceeding the rating flows.
　制御基板３５は、複数の電気部品を有し、これら複数の電気部品により、各蓄電素子２１の状態を検出する検出回路、及び、充電及び放電を制御する制御回路等が形成されている。 The control board 35 has a plurality of electrical components, and these electrical components form a detection circuit for detecting the state of each storage element 21, a control circuit for controlling charging and discharging, and the like.
　外装体１０の外装本体部１１及び蓋体１２は、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）、ＡＢＳ樹脂、若しくは、それらの複合材料等の絶縁性の樹脂材料により形成されている。外装体１０は、これにより、蓄電素子２１等が外部の金属部材等に接触することを回避する。なお、蓋体１２と外部端子８１との一体構造については後述する。 The exterior main body 11 and the lid 12 of the exterior 10 are made of polycarbonate (PC), polypropylene (PP), polyethylene (PE), polystyrene (PS), polyphenylene sulfide resin (PPS), polyphenylene ether (PPE (including modified PPE), )), polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polyether ether ketone (PEEK), tetrafluoroethylene/perfluoroalkyl vinyl ether (PFA), polytetrafluoroethylene (PTFE), polyether sulfone ( PES), ABS resin, or an insulating resin material such as a composite material thereof. The exterior body 10 thereby avoids contact of the power storage element 21 and the like with external metal members and the like. The integral structure of the lid 12 and the external terminal 81 will be described later.
　［蓄電ユニット］
　図３は、実施の形態に係る蓄電ユニット２０の概略構成を示す分解斜視図である。図３に示すように、蓄電ユニット２０は、複数の蓄電素子２１と、これらの複数の蓄電素子２１を収容する収容部２２とを備えている。 [Power storage unit]
FIG. 3 is an exploded perspective view showing a schematic configuration of the power storage unit 20 according to the embodiment. As shown in FIG. 3 , the power storage unit 20 includes a plurality of power storage elements 21 and an accommodating portion 22 that accommodates the plurality of power storage elements 21 .
　蓄電素子２１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、より具体的には、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。本実施の形態では、蓄電素子２１は、扁平な形状を有するパウチタイプの蓄電素子であり、複数（本実施の形態では、４個）のパウチタイプの蓄電素子２１がＹ軸方向に並んで配列されている。蓄電素子２１は、パウチタイプの蓄電素子ではなく、扁平な直方体形状（角形）、円柱形状、長円柱形状または楕円柱形状等の蓄電素子でもよく、その大きさ及び形状は限定されない。配列される蓄電素子２１の個数についても、特に限定されない。蓄電素子２１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２１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。 The storage element 21 is a secondary battery (single battery) capable of charging and discharging electricity, and more specifically, a non-aqueous electrolyte secondary battery such as a lithium ion secondary battery. In the present embodiment, the power storage element 21 is a pouch-type power storage element having a flat shape, and a plurality of (four in the present embodiment) pouch-type power storage elements 21 are arranged side by side in the Y-axis direction. It is The storage element 21 is not a pouch-type storage element, but may be a flat rectangular parallelepiped (square), cylindrical, oval or cylindric storage element, and its size and shape are not limited. The number of power storage elements 21 to be arranged is also not particularly limited. The storage element 21 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 21 may be a primary battery that can use stored electricity without being charged by the user, instead of a secondary battery.
　蓄電装置１が有する蓄電素子２１は全て同様の構成を有するため、以下では、１つの蓄電素子２１の構成について詳細に説明する。図３では、全ての蓄電素子２１が重ねられた状態を図示している。蓄電素子２１は、容器２１０と、一対（正極側及び負極側）の電極端子２２０とを有し、容器２１０の内方には、電極体（図示せず）、及び、電解液（非水電解質）（図示せず）等が収容されている。当該電解液としては、蓄電素子２１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、適宜公知の材料を用いることができる。 Since all the power storage elements 21 of the power storage device 1 have the same configuration, the configuration of one power storage element 21 will be described in detail below. FIG. 3 shows a state in which all the storage elements 21 are stacked. The storage element 21 has a container 210 and a pair of electrode terminals 220 (positive electrode side and negative electrode side). ) (not shown). As the electrolytic solution, the type thereof is not particularly limited as long as it does not impair the performance of the storage element 21, and known materials can be used as appropriate.
　容器２１０は、ラミネートフィルムで形成されたシート状の外装体（外装フィルム）であり、内部に電極体及び電解液等を減圧状態で密閉して収容している。容器２１０は、矩形状の２枚のラミネートフィルムが、Ｙ軸方向に重ねられて構成されている。当該２枚のラミネートフィルムは、一対の電極端子２２０を挟んで熱溶着等により接合（シール）されている。ラミネートフィルムは、アルミニウム等の金属層と、ポリプロピレン（ＰＰ）またはポリエチレン（ＰＥ）等の樹脂層とを含む複数層からなるフレキシブルなフィルムであり、溶着箇所（シール部）には、樹脂層が配置されている。なお、容器２１０は、１枚のラミネートフィルムを袋状に形成して、当該ラミネートフィルムの端部同士を熱溶着により接合することで構成されていてもよい。蓄電素子２１がパウチタイプの蓄電素子でない場合には、容器２１０は、ステンレス鋼、アルミニウム、アルミニウム合金、鉄、メッキ鋼板等の金属製の板状部材により形成されてもよい。 The container 210 is a sheet-like exterior body (exterior film) formed of a laminate film, and contains an electrode body, an electrolytic solution, and the like inside in a sealed state in a decompressed state. The container 210 is configured by stacking two rectangular laminated films in the Y-axis direction. The two laminate films are joined (sealed) by thermal welding or the like with a pair of electrode terminals 220 interposed therebetween. A laminate film is a flexible film composed of multiple layers including a metal layer such as aluminum and a resin layer such as polypropylene (PP) or polyethylene (PE). It is Note that the container 210 may be configured by forming a sheet of laminated film into a bag shape and joining the ends of the laminated film together by thermal welding. If the energy storage element 21 is not a pouch-type energy storage element, the container 210 may be made of a metallic plate member such as stainless steel, aluminum, aluminum alloy, iron, or plated steel plate.
　電極端子２２０は、電極体に電気的に接続された導電性の板状部材（リード板）であり、容器２１０を貫通した状態で容器２１０から露出して配置されている。本実施の形態では、Ｚ軸方向に並ぶ一対の電極端子２２０が、容器２１０のＸ軸マイナス方向の端部からＸ軸マイナス方向に突出して配置されている。具体的には、正極側の電極端子２２０は、電極体の正極板に電気的に接続されたリード端子であり、負極側の電極端子２２０は、電極体の負極板に電気的に接続されたリード端子である。つまり、電極端子２２０は、電極体に蓄えられている電気を蓄電素子２１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２１の内部空間に電気を導入するための金属製の電極端子である。なお、電極端子２２０は、一方（例えば正極側）がＸ軸プラス方向の端部から突出し、他方（例えば負極側）がＸ軸マイナス方向の端部から突出してもよい。電極端子２２０は、アルミニウム、アルミニウム合金、銅、銅合金等で形成されている。 The electrode terminal 220 is a conductive plate-like member (lead plate) electrically connected to the electrode body, and is arranged so as to be exposed from the container 210 while passing through the container 210 . In the present embodiment, a pair of electrode terminals 220 aligned in the Z-axis direction are arranged to protrude in the negative X-axis direction from the end of the container 210 in the negative X-axis direction. Specifically, the positive electrode terminal 220 is a lead terminal electrically connected to the positive plate of the electrode body, and the negative electrode terminal 220 is electrically connected to the negative plate of the electrode body. It is a lead terminal. In other words, the electrode terminal 220 is made of metal for leading electricity stored in the electrode body to the external space of the storage element 21 and for introducing electricity into the internal space of the storage element 21 to store the electricity in the electrode body. It is an electrode terminal made by One of the electrode terminals 220 (for example, the positive electrode side) may protrude from the end in the positive direction of the X-axis, and the other (for example, the negative electrode side) may protrude from the end in the negative direction of the X-axis. The electrode terminal 220 is made of aluminum, aluminum alloy, copper, copper alloy, or the like.
　図３では、電極端子２２０は、容器２１０からＸ軸マイナス方向に突出しただけの簡略化された状態で図示されているが、電極端子２２０は、延設されて隣り合う蓄電素子２１に向けて折れ曲がり、当該隣り合う蓄電素子２１が有する電極端子２２０に接続（接合）されてもよい。または、電極端子２２０は、バスバー等の導電部材に接続（接合）されることで、当該隣り合う蓄電素子２１が有する電極端子２２０に電気的に接続されてもよい。これにより、複数の蓄電素子２１が直列または並列に接続される。さらに、端部の蓄電素子２１が有する電極端子２２０は、蓄電装置１が備える外部端子まで延設されて当該外部端子に接続（接合）されてもよいし、バスバー等の導電部材によって当該外部端子に電気的に接続されてもよい。 In FIG. 3, the electrode terminals 220 are shown in a simplified state in which they only protrude from the container 210 in the negative direction of the X axis. It may be bent and connected (joined) to the electrode terminal 220 of the adjacent storage element 21 . Alternatively, the electrode terminals 220 may be electrically connected to the electrode terminals 220 of the adjacent storage elements 21 by being connected (joined) to a conductive member such as a bus bar. Thereby, the plurality of storage elements 21 are connected in series or in parallel. Further, the electrode terminals 220 of the energy storage elements 21 at the ends may extend to the external terminals of the energy storage device 1 and be connected (joined) to the external terminals, or may be connected (joined) to the external terminals by a conductive member such as a bus bar. may be electrically connected to
　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Ｙ軸方向に積層されて形成されている。なお、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 Y-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 type (stacked) electrode body formed by stacking a plurality of flat plate-shaped electrode plates. or a bellows-shaped electrode body in which an electrode plate is folded into a bellows shape.
　収容部２２は、複数の蓄電素子２１を収容し、当該複数の蓄電素子２１を保持する箱形（略直方体形状）の容器（筐体）である。収容部２２は、第一部材２３と、第一部材２３に組み付けられて第一部材２３とともに複数の蓄電素子２１を収容する第二部材２４とを有している。第一部材２３及び第二部材２４は、複数の蓄電素子２１の外方に配置され、複数の蓄電素子２１を所定の位置で固定し、衝撃等から保護する。複数の蓄電素子２１が第一部材２３及び第二部材２４により保持されることで、複数の蓄電素子２１が第一部材２３及び第二部材２４の内方で固定される。第一部材２３及び第二部材２４は、接着剤、ヒートシール、超音波溶着またはネジ締結等によって互いに接合される。第一部材２３及び第二部材２４は、外装体１０を形成可能な上述した樹脂材料から形成されてもよい。また、第一部材２３及び第二部材２４は、蓄電素子２１等の電気的絶縁性が保たれる構成であれば、金属等の導電部材で形成されてもよい。 The housing portion 22 is a box-shaped (substantially rectangular parallelepiped) container (housing) that houses a plurality of power storage elements 21 and holds the plurality of power storage elements 21 . The housing portion 22 has a first member 23 and a second member 24 assembled to the first member 23 and housing the plurality of power storage elements 21 together with the first member 23 . The first member 23 and the second member 24 are arranged outside the plurality of storage elements 21, fix the plurality of storage elements 21 at predetermined positions, and protect them from impacts and the like. By holding the plurality of storage elements 21 by the first member 23 and the second member 24 , the plurality of storage elements 21 are fixed inside the first member 23 and the second member 24 . The first member 23 and the second member 24 are joined together by adhesive, heat sealing, ultrasonic welding, screw fastening, or the like. The first member 23 and the second member 24 may be made of the above-described resin material capable of forming the exterior body 10 . Moreover, the first member 23 and the second member 24 may be formed of a conductive member such as metal as long as the electrical insulation of the electric storage element 21 and the like is maintained.
　第一部材２３は、第二部材２４のＹ軸プラス方向に配置される、Ｙ軸マイナス方向の面の全面が開口した有底矩形筒状のハウジングである。第一部材２３は、Ｘ軸方向両側の側面に、対向する一対の第一側壁部２３１を有し、Ｚ軸方向両側の側面に、対向する一対の第二側壁部２３２を有し、Ｙ軸プラス方向側に、底壁部２３３を有している。 The first member 23 is a bottomed rectangular cylindrical housing that is arranged in the positive Y-axis direction of the second member 24 and whose entire surface in the negative Y-axis direction is open. The first member 23 has a pair of opposing first side wall portions 231 on both side surfaces in the X-axis direction, and a pair of opposing second side wall portions 232 on both side surfaces in the Z-axis direction. It has a bottom wall portion 233 on the positive direction side.
　第一側壁部２３１は、第一部材２３の短側面（短側壁）を形成する、ＹＺ面に平行な平板状かつ矩形状の壁部であり、Ｘ軸方向において複数の蓄電素子２１を挟む位置に配置される。第一側壁部２３１は、第二側壁部２３２及び底壁部２３３に隣接する壁部である。第二側壁部２３２は、第一部材２３の長側面（長側壁）を形成する、ＸＹ面に平行な平板状かつ矩形状の壁部であり、Ｚ軸方向において複数の蓄電素子２１を挟む位置に配置される。第二側壁部２３２は、第一側壁部２３１及び底壁部２３３に隣接する壁部である。底壁部２３３は、第一部材２３の底面（底壁）を形成する、ＸＺ面に平行な平板状かつ矩形状の壁部であり、Ｙ軸プラス方向端部の蓄電素子２１とＹ軸方向において対向し、かつ、当該蓄電素子２１と当接する。 The first side wall portion 231 is a flat and rectangular wall portion parallel to the YZ plane that forms a short side surface (short side wall) of the first member 23, and is positioned to sandwich the plurality of power storage elements 21 in the X-axis direction. placed in The first side wall portion 231 is a wall portion adjacent to the second side wall portion 232 and the bottom wall portion 233 . The second side wall portion 232 is a plate-like rectangular wall portion parallel to the XY plane that forms the long side surface (long side wall) of the first member 23, and is positioned to sandwich the plurality of power storage elements 21 in the Z-axis direction. placed in The second side wall portion 232 is a wall portion adjacent to the first side wall portion 231 and the bottom wall portion 233 . The bottom wall portion 233 is a flat and rectangular wall portion that forms the bottom surface (bottom wall) of the first member 23 and is parallel to the XZ plane. , and abut against the storage element 21 .
　一対の第一側壁部２３１のうち、Ｘ軸マイナス方向に配置された第一側壁部２３１には、複数の蓄電素子２１の電極端子２２０を露出させる切欠２３４が形成されている。この切欠２３４を介してＹ軸プラス方向端部の蓄電素子２１の電極端子２２０と、外部端子８１とを電気的に接続する導電経路（図示省略）が配置される。 Of the pair of first side wall portions 231 , the first side wall portion 231 arranged in the negative direction of the X-axis is provided with cutouts 234 that expose the electrode terminals 220 of the plurality of storage elements 21 . A conductive path (not shown) that electrically connects the electrode terminal 220 of the storage element 21 at the end in the Y-axis positive direction and the external terminal 81 is arranged through the notch 234 .
　第二部材２４は、第一部材２３のＹ軸マイナス方向に配置される、Ｙ軸プラス方向の面の全面が開口した有底矩形筒状のハウジングである。第二部材２４は、Ｘ軸方向両側の側面に、対向する一対の第一側壁部２４１を有し、Ｚ軸方向両側の側面に、対向する一対の第二側壁部２４２を有し、Ｙ軸マイナス方向側に、底壁部２４３を有している。 The second member 24 is a bottomed rectangular cylindrical housing which is arranged in the negative Y-axis direction of the first member 23 and whose entire surface in the positive Y-axis direction is open. The second member 24 has a pair of opposing first side wall portions 241 on both side surfaces in the X-axis direction, and a pair of opposing second side wall portions 242 on both side surfaces in the Z-axis direction. It has a bottom wall portion 243 on the negative direction side.
　第一側壁部２４１は、第二部材２４の短側面（短側壁）を形成する、ＹＺ面に平行な平板状かつ矩形状の壁部であり、Ｘ軸方向において複数の蓄電素子２１を挟む位置に配置される。第一側壁部２４１は、第二側壁部２４２及び底壁部２４３に隣接する壁部である。第二側壁部２４２は、第二部材２４の長側面（長側壁）を形成する、ＸＹ面に平行な平板状かつ矩形状の壁部であり、Ｚ軸方向において複数の蓄電素子２１を挟む位置に配置される。第二側壁部２４２は、第一側壁部２４１及び底壁部２４３に隣接する壁部である。底壁部２４３は、第二部材２４の底面（底壁）を形成する、ＸＺ面に平行な平板状かつ矩形状の壁部であり、Ｙ軸マイナス方向端部の蓄電素子２１とＹ軸方向において対向し、かつ、当該蓄電素子２１と当接する。 The first side wall portion 241 is a flat and rectangular wall portion parallel to the YZ plane that forms a short side surface (short side wall) of the second member 24, and is positioned to sandwich the plurality of power storage elements 21 in the X-axis direction. placed in The first side wall portion 241 is a wall portion adjacent to the second side wall portion 242 and the bottom wall portion 243 . The second side wall portion 242 is a plate-like and rectangular wall portion parallel to the XY plane that forms the long side surface (long side wall) of the second member 24, and is positioned to sandwich the plurality of power storage elements 21 in the Z-axis direction. placed in The second side wall portion 242 is a wall portion adjacent to the first side wall portion 241 and the bottom wall portion 243 . The bottom wall portion 243 is a flat and rectangular wall portion that forms the bottom surface (bottom wall) of the second member 24 and is parallel to the XZ plane. , and abut against the storage element 21 .
　底壁部２４３の外面（Ｙ軸マイナス方向を向く面）は、複数のバスバー３３、ヒューズ３４及び制御基板３５が取り付けられる取付面２５である。取付面２５には、制御基板３５がネジ止めされる複数のボス部２６と、ヒューズ３４が取り付けられるヒューズ取付部２７と、各バスバー３３が個別に取り付けられる複数のバスバー取付部２８とが設けられている。 The outer surface of the bottom wall portion 243 (the surface facing the Y-axis minus direction) is the mounting surface 25 on which the plurality of bus bars 33, the fuses 34, and the control board 35 are mounted. The mounting surface 25 is provided with a plurality of boss portions 26 to which the control board 35 is screwed, a fuse mounting portion 27 to which the fuses 34 are mounted, and a plurality of busbar mounting portions 28 to which the busbars 33 are individually mounted. ing.
　複数のボス部２６は、取付面２５からＹ軸マイナス方向に突出しており、その先端面の中央部にネジ穴が形成されている。ボス部２６の設置個数は如何様でもよいが、本実施の形態ではボス部２６は３つ設けられており、それぞれボス部２６ａ、２６ｂ、２６ｃと称す。 A plurality of boss portions 26 protrude from the mounting surface 25 in the Y-axis negative direction, and screw holes are formed in the central portions of the tip surfaces thereof. Although any number of boss portions 26 may be provided, three boss portions 26 are provided in the present embodiment, and are referred to as boss portions 26a, 26b, and 26c, respectively.
　ボス部２６ａは、取付面２５においてＸ軸マイナス方向の縁辺近傍であって、Ｚ軸方向の略中間部に配置されている。ボス部２６ｂは、取付面２５においてＸ軸マイナス方向寄りであり、Ｚ軸マイナス方向寄りの角部近傍に配置されている。ボス部２６ｃは、取付面２５においてＸ軸プラス方向寄りであり、Ｚ軸方向の略中間部に配置されている。 The boss portion 26a is arranged in the vicinity of the edge of the mounting surface 25 in the negative direction of the X-axis and substantially in the middle in the Z-axis direction. The boss portion 26b is located near the negative direction of the X-axis on the mounting surface 25 and near the corner portion near the negative direction of the Z-axis. The boss portion 26c is located on the attachment surface 25 toward the plus direction of the X-axis and substantially in the middle in the Z-axis direction.
　ヒューズ取付部２７は、取付面２５においてＸ軸プラス方向の縁辺の近傍に配置されており、Ｚ軸方向に所定の間隔をあけて一対配置されている。ヒューズ取付部２７は、ネジ穴を有しており、ヒューズ３４を貫通したボルトをこのネジ穴に螺合することで、当該ヒューズ３４を保持している。 The fuse mounting portions 27 are arranged in the vicinity of the edge of the mounting surface 25 in the positive direction of the X-axis, and are arranged in pairs with a predetermined interval in the Z-axis direction. The fuse mounting portion 27 has a screw hole, and holds the fuse 34 by screwing a bolt passing through the fuse 34 into the screw hole.
　複数のバスバー取付部２８は、それぞれ異なるバスバー３３を保持する部位である。バスバー取付部２８の設置個数は如何様でもよいが、本実施の形態ではバスバー取付部２８は３つ設けられており、それぞれバスバー取付部２８ａ、２８ｂ、２８ｃと称す。 The plurality of busbar mounting portions 28 are portions that hold different busbars 33, respectively. Although the number of busbar mounting portions 28 to be installed is arbitrary, three busbar mounting portions 28 are provided in the present embodiment, and are referred to as busbar mounting portions 28a, 28b, and 28c, respectively.
　バスバー取付部２８ａは、取付面２５においてＸ軸マイナス方向の縁辺近傍であって、Ｚ軸方向略中央部に配置されている。バスバー取付部２８ａは、Ｙ軸マイナス方向端部の蓄電素子２１の電極端子２２０に接合（接続）されたバスバー（図示省略）を保持する。バスバー取付部２８ａは、ネジ穴を有しており、バスバーを貫通したボルトをこのネジ穴に螺合することで、当該バスバーを保持している。 The busbar mounting portion 28a is arranged near the edge of the mounting surface 25 in the negative direction of the X-axis and substantially in the center in the Z-axis direction. The busbar attachment portion 28a holds a busbar (not shown) joined (connected) to the electrode terminals 220 of the storage elements 21 at the ends in the Y-axis negative direction. The busbar mounting portion 28a has a screw hole, and the busbar is held by screwing a bolt passing through the busbar into the screw hole.
　バスバー取付部２８ｂは、取付面２５においてＸ軸プラス方向寄りであり、Ｚ軸プラス方向寄りに配置されている。バスバー取付部２８ｂは、一対の外部端子８１のうち、Ｘ軸プラス方向に配置された外部端子８１に接合（接続）されるとともに、ヒューズ３４に接合（接続）されるバスバー３３ｂを保持する。 The busbar mounting portion 28b is arranged on the mounting surface 25 closer to the positive direction of the X axis and closer to the positive direction of the Z axis. The busbar attachment portion 28b holds a busbar 33b that is joined (connected) to the external terminal 81 arranged in the positive direction of the X-axis and joined (connected) to the fuse 34 .
　バスバー取付部２８ｃは、取付面２５においてＸ軸マイナス方向寄りであり、Ｚ軸プラス方向寄りの位置に配置されている。バスバー取付部２８ｃは、一対の外部端子８１のうち、Ｘ軸マイナス方向に配置された外部端子８１に接合（接続）されるバスバー３３ｃを保持する。 The busbar mounting portion 28c is arranged on the mounting surface 25 at a position closer to the negative direction of the X-axis and closer to the positive direction of the Z-axis. The busbar attachment portion 28c holds the busbar 33c joined (connected) to the external terminal 81 arranged in the negative direction of the X-axis among the pair of external terminals 81 .
　［外部端子と蓋体との一体構造］
　外部端子８１と蓋体１２との一体構造について説明する。各外部端子８１は、インサート成形によって蓋体１２をなす樹脂材料と一体化されている。つまり、各外部端子８１の一部は、蓋体１２をなす樹脂材料が直接的に密着しており、当該樹脂材料により覆われた状態で一体化されている。 [Integrated structure of external terminal and cover]
An integral structure of the external terminal 81 and the lid 12 will be described. Each external terminal 81 is integrated with the resin material forming the lid 12 by insert molding. That is, a part of each external terminal 81 is in direct contact with the resin material forming the lid 12, and is integrated while being covered with the resin material.
　外部端子８１の具体的構造について説明する。各外部端子８１は、基本的には同様構造であるので、ここではＸ軸マイナス方向の外部端子８１を例示して説明する。図４は、実施の形態に係る外部端子８１と蓋体１２との一体構造を示す斜視図である。図４では、各外部端子８１に接続されるバスバー３３と、小蓋１２５とが省略された状態を示している。図５及び図６は、実施の形態に係る外部端子８１を示す斜視図である。図５及び図６とは、それぞれ異なる方向から外部端子８１を見た斜視図である。 A specific structure of the external terminal 81 will be described. Since each external terminal 81 has basically the same structure, the external terminal 81 in the negative direction of the X-axis will be described here as an example. FIG. 4 is a perspective view showing an integrated structure of the external terminal 81 and the lid body 12 according to the embodiment. FIG. 4 shows a state in which the bus bar 33 connected to each external terminal 81 and the small lid 125 are omitted. 5 and 6 are perspective views showing the external terminal 81 according to the embodiment. 5 and 6 are perspective views of the external terminal 81 viewed from different directions.
　外部端子８１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で形成されている。具体的には、図４～図６に示すように、外部端子８１は、板金から形成されており、締結部８２と、延設部８３と、屈曲部８４とを備えている。 The external terminal 81 is made 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. Specifically, as shown in FIGS. 4 to 6, the external terminal 81 is made of sheet metal and has a fastening portion 82, an extension portion 83, and a bent portion 84. As shown in FIGS.
　締結部８２は、Ｘ軸方向視逆Ｕ字状に形成された部位であり、その一部が蓋体１２からＺ軸プラス方向に突出している。締結部８２において蓋体１２から突出した部位は、Ｙ軸方向で対向する一対の側壁部８２１、８２２と、これら一対の側壁部８２１、８２２を連結する天面部８２３とを有している。各側壁部８２１、８２２は、ＸＺ面に平行な平板部であり、それぞれＹ軸方向に貫通する円形の取付孔８２１ａ、８２２ａを有している。天面部８２３は、ＸＹ面に平行な平板部であり、Ｚ軸方向に貫通する円形の取付孔８２３ａを有している。各側壁部８２１、８２２及び天面部８２３の一つには、外部機器に接続された外部導電体（バスバーまたはケーブル等：図示省略）が各取付孔８２１ａ、８２２ａ、８２３ａを介して締結されるようになっている。各側壁部８２１、８２２及び天面部８２３と外部導電体との締結としては、カシメまたはネジ止めなどが挙げられる。 The fastening portion 82 is a portion formed in an inverted U shape when viewed in the X-axis direction, and a portion thereof protrudes from the lid body 12 in the positive Z-axis direction. A portion of the fastening portion 82 protruding from the lid body 12 has a pair of side wall portions 821 and 822 facing each other in the Y-axis direction, and a top surface portion 823 connecting the pair of side wall portions 821 and 822 . Each of the side wall portions 821 and 822 is a flat plate portion parallel to the XZ plane, and has circular mounting holes 821a and 822a passing through in the Y-axis direction. The top surface portion 823 is a flat plate portion parallel to the XY plane, and has a circular mounting hole 823a penetrating in the Z-axis direction. One of the side wall portions 821 and 822 and the top surface portion 823 is provided with an external conductor (such as a busbar or cable: not shown) connected to an external device so that it is fastened through each mounting hole 821a, 822a, 823a. It has become. The fastening between the side wall portions 821 and 822 and the top surface portion 823 and the external conductor includes crimping, screwing, and the like.
　締結部８２には、Ｙ軸マイナス方向の側壁部８２１の下端部から延びる基部８２４が設けられている。基部８２４は、側壁部８２１と同じ肉厚のままで、当該側壁部８２１の下端部から下方に向けてＸＺ面に平行に延びた部位である。基部８２４は蓋体１２に埋設されている。基部８２４には、Ｙ軸方向に貫通した円形の一対の貫通孔８２４ａが、Ｘ軸方向に並んで設けられている。 The fastening portion 82 is provided with a base portion 824 extending from the lower end portion of the side wall portion 821 in the Y-axis negative direction. The base portion 824 is a portion extending downward from the lower end portion of the side wall portion 821 in parallel with the XZ plane while maintaining the same thickness as the side wall portion 821 . The base 824 is embedded in the lid 12 . The base portion 824 is provided with a pair of circular through holes 824a penetrating in the Y-axis direction and arranged side by side in the X-axis direction.
　締結部８２には、Ｙ軸プラス方向の側壁部８２２の下端部から延びる対向部８２５が設けられている。対向部８２５は基部８２４にＹ軸方向で対向する部位であり、側壁部８２２の下端部からＹ軸プラス方向に傾くように下方に向けて板状に延びている。対向部８２５は蓋体１２に埋設されている。対向部８２５には、Ｙ軸方向に貫通した円形の一対の貫通孔８２５ａが、Ｘ軸方向に並んで設けられている。 The fastening portion 82 is provided with a facing portion 825 extending from the lower end portion of the side wall portion 822 in the positive Y-axis direction. The opposing portion 825 is a portion that faces the base portion 824 in the Y-axis direction, and extends in a plate shape downward from the lower end portion of the side wall portion 822 so as to be inclined in the positive Y-axis direction. The facing portion 825 is embedded in the lid 12 . The opposing portion 825 is provided with a pair of circular through-holes 825a penetrating in the Y-axis direction and arranged side by side in the X-axis direction.
　延設部８３は、基部８２４から延びる、蓋体１２に埋設された部位である。具体的には、延設部８３は、Ｘ軸方向に長尺な板状部であり、基部８２４と同じ肉厚のままで、当該基部８２４のＸ軸プラス方向の端部から締結部８２の突出方向とは交差する方向（Ｘ軸プラス方向）に延びている。つまり、延設部８３のＹ軸プラス方向の主面は、基部８２４のＹ軸プラス方向の主面と面一であり、延設部８３のＹ軸マイナス方向の主面は、基部８２４のＹ軸マイナス方向の主面と面一である。延設部８３は、締結部８２の基部８２４と同一平面（図１０における二点鎖線Ｌ１）上に延設しているとも言える。また、延設部８３と基部８２４との境界には段差が形成されていない。 The extension part 83 is a part embedded in the lid body 12 and extending from the base part 824 . Specifically, the extension part 83 is a plate-like part elongated in the X-axis direction, and has the same thickness as that of the base part 824. It extends in a direction (X-axis plus direction) that intersects the projecting direction. That is, the main surface of the extension portion 83 in the positive Y-axis direction is flush with the main surface of the base portion 824 in the positive Y-axis direction, and the main surface of the extension portion 83 in the negative Y-axis direction is the Y-axis direction of the base portion 824 . It is flush with the main surface in the negative direction of the axis. It can also be said that the extension portion 83 extends on the same plane as the base portion 824 of the fastening portion 82 (the chain double-dashed line L1 in FIG. 10). No step is formed at the boundary between the extension portion 83 and the base portion 824 .
　屈曲部８４は、延設部８３のＸ軸プラス方向の端部における上端部から屈曲された部位である。屈曲部８４は、ＸＹ面に平行な平板部であり、Ｚ軸方向に貫通する円形の取付孔８４ａを有している。屈曲部８４は、蓋体１２の収容凹部１２１内に収容されており、バスバー３３が取付孔８４ａを介して締結されるようになっている。屈曲部８４とバスバー３３との締結としては、カシメまたはネジ止めなどが挙げられる。 The bent portion 84 is a portion bent from the upper end portion of the end portion of the extended portion 83 in the positive direction of the X axis. The bent portion 84 is a flat plate portion parallel to the XY plane, and has a circular mounting hole 84a penetrating in the Z-axis direction. The bent portion 84 is housed in the housing recess 121 of the lid 12, and the busbar 33 is fastened through the mounting hole 84a. The fastening between the bent portion 84 and the bus bar 33 may be caulking, screwing, or the like.
　蓋体１２と外部端子８１との一体構造について説明する。図７～図１０は、実施の形態に係る蓋体１２と外部端子８１との一体構造を示す断面斜視図である。具体的には、図７は、図４におけるＶＩＩ－ＶＩＩ線を含む切断面で蓋体１２及び外部端子８１を切断した図である。図８は、図４におけるＶＩＩＩ－ＶＩＩＩ線を含む切断面で蓋体１２及び外部端子８１を切断した図である。図９は、図４におけるＩＸ－ＩＸ線を含む切断面で蓋体１２及び外部端子８１を切断した図である。図１０は、図４におけるＸ－Ｘ線を含む切断面で蓋体１２及び外部端子８１を切断した図である。 An integral structure of the lid 12 and the external terminal 81 will be described. 7 to 10 are cross-sectional perspective views showing the integrated structure of the lid body 12 and the external terminal 81 according to the embodiment. Specifically, FIG. 7 is a diagram of the lid 12 and the external terminals 81 cut along a cut plane including line VII-VII in FIG. FIG. 8 is a diagram of the lid 12 and the external terminal 81 cut along a cut plane including line VIII-VIII in FIG. FIG. 9 is a diagram of the lid 12 and the external terminals 81 cut along a cut plane including line IX-IX in FIG. FIG. 10 is a diagram of the lid 12 and the external terminals 81 cut along the line XX in FIG.
　図４及び図７～図１０に示すように、蓋体１２は、外装本体部１１の開口部１１１を外方から囲む矩形枠状の枠壁部１２２を有している。この枠壁部１２２のうち、Ｙ軸マイナス方向の辺部１２３には、外部端子８１の一部が埋設されている。具体的には、辺部１２３には、締結部８２の基部８２４と延設部８３とが埋設されている。基部８２４のＹ軸プラス方向の主面は、辺部１２３から露出している。また、延設部８３のＹ軸プラス方向の主面と、上端面の一部は、辺部１２３から露出している。基部８２４及び延設部８３において、辺部１２３から露出していない部位は、辺部１２３に埋設されている。具体的には、基部８２４のＸ軸マイナス方向の端面と、基部８２４のＹ軸マイナス方向の主面と、基部８２４の下端面と、延設部８３のＸ軸プラス方向の端面（先端面）と、延設部８３のＹ軸マイナス方向の主面と、延設部８３の下端面とが辺部１２３に埋設されている。前述したように、外部端子８１は、インサート成形によって蓋体１２をなす樹脂材料と一体化されているので、基部８２４及び延設部８３において辺部１２３に埋設されている部位が、樹脂材料に直接的に密着し接合されている。このように、基部８２４及び延設部８３は、延設部８３の延設方向（Ｘ軸方向）におけるＹ軸マイナス方向の主面の全体が、蓋体１２にインサート成形により埋設された第一インサート部９１である。第一インサート部９１が、締結部８２の基部８２４に加えて、延設部８３にも設けられているので、外部端子８１と蓋体１２との密着面積が広範囲化されている。特に、本実施の形態では、基部８２４及び延設部８３は、Ｘ軸方向におけるＹ軸マイナス方向の主面の全体が第一インサート部９１であるので、外部端子８１と蓋体１２との密着面積がより広範囲化される。また、第一インサート部９１は、図４及び図１０に示すように、辺部１２３の外面に沿って配置されている。このため、外部端子８１の熱を辺部１２３の外面から外方に向けて放出できる。放熱性の観点では、辺部１２３の外面と、第一インサート部９１におけるＹ軸マイナス方向の主面との間隔であって最も近接する部分の間隔Ｓ（図７参照）は小さい方がよいが、当該間隔Ｓをあまり小さくしすぎると外部端子８１と辺部１２３との接合強度が低下するおそれがある。このため、間隔Ｓは、第一インサート部９１（基部８２４または延設部８３）の肉厚の８０％以上１２０％以下であればよい。 As shown in FIGS. 4 and 7 to 10, the lid 12 has a rectangular frame-shaped frame wall portion 122 surrounding the opening 111 of the exterior body portion 11 from the outside. A portion of the external terminal 81 is embedded in the side portion 123 of the frame wall portion 122 in the negative Y-axis direction. Specifically, the base portion 824 and the extension portion 83 of the fastening portion 82 are embedded in the side portion 123 . A main surface of the base portion 824 in the positive Y-axis direction is exposed from the side portion 123 . A main surface of the extending portion 83 in the positive Y-axis direction and a portion of the upper end surface are exposed from the side portion 123 . Portions of the base portion 824 and the extension portion 83 that are not exposed from the side portion 123 are embedded in the side portion 123 . Specifically, the end surface of the base portion 824 in the negative direction of the X axis, the main surface of the base portion 824 in the negative direction of the Y axis, the lower end surface of the base portion 824, and the end surface (tip surface) of the extension portion 83 in the positive direction of the X axis. In addition, the main surface of the elongated portion 83 in the Y-axis negative direction and the lower end surface of the elongated portion 83 are embedded in the side portion 123 . As described above, the external terminal 81 is integrated with the resin material forming the cover 12 by insert molding, so that the portion of the base portion 824 and the extension portion 83 embedded in the side portion 123 is formed of the resin material. Directly adhered and joined. As described above, the base portion 824 and the extension portion 83 are the first main surface in which the entire main surface of the Y-axis minus direction in the extension direction (X-axis direction) of the extension portion 83 is embedded in the lid body 12 by insert molding. It is the insert portion 91 . Since the first insert portion 91 is provided not only on the base portion 824 of the fastening portion 82 but also on the extension portion 83, the contact area between the external terminal 81 and the lid body 12 is widened. In particular, in the present embodiment, the main surface of the base portion 824 and the extension portion 83 in the negative Y-axis direction in the X-axis direction is the first insert portion 91, so that the external terminal 81 and the lid body 12 are in close contact with each other. The area is made wider. 4 and 10, the first insert portion 91 is arranged along the outer surface of the side portion 123. As shown in FIGS. Therefore, the heat of the external terminal 81 can be radiated outward from the outer surface of the side portion 123 . From the viewpoint of heat dissipation, it is preferable that the distance S (see FIG. 7) between the outer surface of the side portion 123 and the main surface of the first insert portion 91 in the negative direction of the Y-axis, which is the closest distance, is small. However, if the interval S is too small, the bonding strength between the external terminal 81 and the side portion 123 may decrease. Therefore, the interval S should be 80% or more and 120% or less of the thickness of the first insert portion 91 (base portion 824 or extension portion 83).
　図７及び図１０に示すように、枠壁部１２２のＸ軸マイナス方向の辺部１２４であって、Ｙ軸マイナス方向の端部には、枠壁部１２２のＹ軸マイナス方向の辺部１２３に対向する梁部１２６が設けられている。梁部１２６は、Ｘ軸方向に延びる角柱状の部位である。この梁部１２６には、外部端子８１の対向部８２５が埋設されている。対向部８２５は、Ｘ軸方向の両端面と、Ｙ軸方向の両主面と、下端面とが梁部１２６に埋設されており、蓋体１２をなす樹脂材料に直接的に密着している。つまり、対向部８２５は、その全体がインサート成形により蓋体１２に埋設された第二インサート部９２である。このように、外部端子８１には、第一インサート部９１に加えて第二インサート部９２も設けられているので、外部端子８１と蓋体１２との密着面積がより広範囲化されている。 As shown in FIGS. 7 and 10, a side portion 124 of the frame wall portion 122 in the negative direction of the X-axis and an end portion in the negative direction of the Y-axis is provided with a side portion 123 of the frame wall portion 122 in the negative direction of the Y-axis. A beam portion 126 facing the is provided. The beam portion 126 is a prismatic portion extending in the X-axis direction. A facing portion 825 of the external terminal 81 is embedded in the beam portion 126 . Both end surfaces in the X-axis direction, both main surfaces in the Y-axis direction, and a lower end surface of the facing portion 825 are embedded in the beam portion 126 , and are in direct contact with the resin material forming the lid 12 . . That is, the facing portion 825 is the second insert portion 92 that is entirely embedded in the lid 12 by insert molding. As described above, the external terminal 81 is provided with the second insert portion 92 in addition to the first insert portion 91 , so that the contact area between the external terminal 81 and the lid body 12 is further widened.
　基部８２４及び対向部８２５の各貫通孔８２４ａ、８２５ａ内には、蓋体１２をなす樹脂材料（蓋体１２の一部）が配置されている。具体的には、樹脂材料は、各貫通孔８２４ａ、８２５ａに充填されており、各貫通孔８２４ａ、８２５ａの内周面に密着している。 A resin material forming the lid 12 (part of the lid 12) is placed in the through holes 824a and 825a of the base portion 824 and the facing portion 825. As shown in FIG. Specifically, the resin material is filled in the through- holes 824a and 825a and adheres to the inner peripheral surfaces of the through- holes 824a and 825a.
　［効果など］
　以上のように、本実施の形態によれば、外部端子８１の締結部８２の基部８２４と延設部８３とが蓋体１２にインサート成形で埋設された第一インサート部９１を有するので、外部導電体を締結部８２に締結する際に受ける応力を締結部８２の基部８２４と延設部８３とで広範囲にわたって蓋体１２に分散できる。特に、延設部８３は、締結部８２の基部８２４と同一平面上に延設しているので、インサート成形時の樹脂材料の流れをスムーズにできる。このため、インサート成形時に外部端子８１が樹脂材料から受ける衝撃を抑制でき、外部端子８１の位置ずれを抑制できる。これにより、外部端子８１の位置ずれを抑制しつつ、締結時における応力集中を抑制でき、外部端子８１の耐トルク性能を高めることが可能である。したがって、外部導電体を外部端子８１に締結する際の、外部端子８１の損傷を抑制できる。 [Effects, etc.]
As described above, according to the present embodiment, the base portion 824 and the extension portion 83 of the fastening portion 82 of the external terminal 81 have the first insert portion 91 embedded in the lid body 12 by insert molding. The base portion 824 of the fastening portion 82 and the extension portion 83 can disperse the stress received when the conductor is fastened to the fastening portion 82 over a wide range in the lid body 12 . In particular, since the extension portion 83 extends on the same plane as the base portion 824 of the fastening portion 82, the resin material can flow smoothly during insert molding. Therefore, it is possible to suppress the impact that the external terminals 81 receive from the resin material at the time of insert molding, and it is possible to suppress the displacement of the external terminals 81 . As a result, it is possible to suppress stress concentration at the time of fastening while suppressing positional deviation of the external terminals 81 , and to enhance the torque resistance performance of the external terminals 81 . Therefore, it is possible to suppress damage to the external terminal 81 when fastening the external conductor to the external terminal 81 .
　外部端子８１において蓋体１２にインサートされた部分（密着した面積）が大きくなるので、外部端子８１及び蓋体１２との境界における密閉性を高めることも可能である。 Since the portion (contact area) of the external terminal 81 inserted into the lid 12 is increased, it is possible to improve the sealing performance at the boundary between the external terminal 81 and the lid 12 .
　締結部８２の基部８２４及び延設部８３では、一対の主面のうち一方の主面（Ｙ軸マイナス方向の主面）であって、延設方向（Ｘ軸方向）における全体が第一インサート部９１であるので、締結時に作用する応力をより広範囲にわたって蓋体１２に分散できる。したがって、外部端子８１の耐トルク性能をより高めることができ、外部端子８１の損傷をより確実に抑制できる。 In the base portion 824 and the extension portion 83 of the fastening portion 82, one of the pair of principal surfaces (the principal surface in the Y-axis negative direction), which is the entirety in the extension direction (X-axis direction), is the first insert. Since it is the portion 91 , the stress acting upon fastening can be dispersed over a wider range in the lid body 12 . Therefore, the torque resistance performance of the external terminals 81 can be further enhanced, and damage to the external terminals 81 can be more reliably suppressed.
　外部端子８１において基部８２４に対向する対向部８２５が蓋体１２にインサート成形で埋設された第二インサート部９２を有しているので、締結時の応力を、第二インサート部９２を介して蓋体１２に分散できる。これにより、外部端子８１の耐トルク性能をより高めることができ、外部端子８１の損傷をより確実に抑制できる。 Since the facing portion 825 facing the base portion 824 of the external terminal 81 has the second insert portion 92 embedded in the lid body 12 by insert molding, stress during fastening is transferred to the lid via the second insert portion 92 . Dispersible in body 12 . As a result, the torque resistance performance of the external terminals 81 can be further enhanced, and damage to the external terminals 81 can be suppressed more reliably.
　第二インサート部９２が存在しない場合、締結時では、締結部８２の基部８２４と、締結部８２において蓋体１２から突出した部分とが境界部分で捻られ損傷するおそれもある。しかしながら、本実施の形態では第二インサート部９２が、締結部８２の基部８２４に対向した位置で締結時の応力を受けるので、締結部８２全体としての捻れが抑制される。したがって、前述した境界部分での捻れも抑制され、当該境界部分での損傷を抑制できる。 If the second insert portion 92 does not exist, the base portion 824 of the fastening portion 82 and the portion of the fastening portion 82 protruding from the lid body 12 may be twisted and damaged at the boundary portion during fastening. However, in the present embodiment, the second insert portion 92 receives stress during fastening at a position facing the base portion 824 of the fastening portion 82, so that the fastening portion 82 as a whole is prevented from twisting. Therefore, the torsion at the boundary portion described above is also suppressed, and damage at the boundary portion can be suppressed.
　第一インサート部９１に設けられた貫通孔８２４ａ内に蓋体１２の一部が配置されているので、当該蓋体１２の一部によって外部端子８１全体の回転を規制できる。したがって、外部端子８１と蓋体１２との一体性を高めることができ、外部端子８１の耐トルク性能を高めることができ、外部端子８１の損傷をより確実に抑制できる。 Since a part of the lid 12 is arranged in the through hole 824a provided in the first insert portion 91, the rotation of the entire external terminal 81 can be restricted by the part of the lid 12. Therefore, the integrity between the external terminal 81 and the lid 12 can be enhanced, the torque resistance performance of the external terminal 81 can be enhanced, and damage to the external terminal 81 can be suppressed more reliably.
　第二インサート部９２においても貫通孔８２５ａ内に蓋体１２の一部が配置されているので、当該蓋体１２の一部によって外部端子８１全体の回転を規制できる。したがって、外部端子８１と蓋体１２との一体性をより高めることができ、外部端子８１の耐トルク性能をより高めることができる。 Since a part of the lid 12 is also arranged in the through hole 825a in the second insert part 92, the rotation of the entire external terminal 81 can be restricted by the part of the lid 12. Therefore, the integrity between the external terminal 81 and the lid 12 can be further improved, and the torque resistance performance of the external terminal 81 can be further improved.
　第一インサート部９１が蓋体１２の外面に沿って配置されているので、当該蓋体１２の外面から外方に向けて外部端子８１の熱を放出できる。つまり、第一インサート部９１を設けることで耐トルク性能を高めたとしても、外装体１０の内部に熱が籠もることを抑制できる。 Since the first insert portion 91 is arranged along the outer surface of the lid 12 , the heat of the external terminals 81 can be released outward from the outer surface of the lid 12 . In other words, even if the torque resistance performance is enhanced by providing the first insert portion 91 , it is possible to prevent heat from being trapped inside the exterior body 10 .
　第一インサート部９１に延設部８３の先端面（Ｘ軸プラス方向の端面）が含まれているので、当該先端面でも蓋体１２に応力を分散でき、締結時に作用する応力をより広範囲にわたって蓋体１２に分散できる。 Since the first insert portion 91 includes the tip surface (the end surface in the positive direction of the X axis) of the extension portion 83, the stress can be dispersed in the lid body 12 even on the tip surface, and the stress acting during fastening can be distributed over a wider range. It can be dispersed in the lid 12 .
　先端面は、延設部８３において主面とは異なる方向を向く面であるので、主面に作用する応力とは異なる方向の応力が先端面に作用することになる。つまり、多様な方向の応力を蓋体１２に分散できるので、外部端子８１の耐トルク性能をより高めることができる。 Since the tip surface is a surface facing in a different direction from the main surface of the extended portion 83, stress in a direction different from the stress acting on the main surface acts on the tip surface. In other words, stresses in various directions can be dispersed in the lid body 12, so that the torque resistance performance of the external terminals 81 can be further enhanced.
　対向部８２５が側壁部８２２の下端部からＹ軸プラス方向に傾くように下方に向けて伸びているので、この対向部８２５の傾きにより、上下方向（Ｚ軸方向）に働く力に対する第二インサート部９２の強度を高めることができる。したがって、外部端子８１の損傷をより抑制できる。 Since the opposing portion 825 extends downward from the lower end of the side wall portion 822 so as to be inclined in the positive Y-axis direction, the inclination of the opposing portion 825 prevents the second insert from the force acting in the vertical direction (Z-axis direction). The strength of the portion 92 can be increased. Therefore, damage to the external terminals 81 can be further suppressed.
　［変形例１］
　上記実施の形態では、延設部８３と基部８２４との境界に段差がない場合を例示した。しかしながら、延設部が基部と同一平面上に延設しているのであれば、延設部と基部との境界に段差が形成されてもよい。 [Modification 1]
In the above embodiment, the case where there is no step at the boundary between the extension portion 83 and the base portion 824 has been exemplified. However, as long as the extension part extends on the same plane as the base part, a step may be formed at the boundary between the extension part and the base part.
　図１１は、変形例１に係る外部端子８１Ｂの延設部８３ｂ及び基部８２４ｂを示す下面図である。図１１に示すように、延設部８３ｂ及び基部８２４ｂの境界には段差が形成されているが、延設部８３ｂ及び基部８２４ｂのそれぞれは同一平面（図１１における二点鎖線Ｌ１）上に配置されている。この場合、延設部８３ｂ及び基部８２４ｂの一方の肉厚が他方の肉厚に重畳するために、段差もそれほど大きくならない。したがって、この場合においても、インサート成形時の樹脂材料の流れを阻害しにくくでき、インサート成形時に外部端子８１Ｂが樹脂材料から受ける衝撃を抑制できる。 FIG. 11 is a bottom view showing the extension part 83b and the base part 824b of the external terminal 81B according to Modification 1. FIG. As shown in FIG. 11, a step is formed at the boundary between the extension portion 83b and the base portion 824b. It is In this case, since the thickness of one of the extension portion 83b and the base portion 824b overlaps the thickness of the other, the step is not so large. Therefore, even in this case, the flow of the resin material during insert molding is less likely to be hindered, and the impact received by the resin material on the external terminals 81B during insert molding can be suppressed.
　［その他］
　以上、本発明の実施の形態に係る蓄電装置について説明したが、本発明は、上記実施の形態に限定されるものではない。つまり、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い。本発明の範囲は請求の範囲によって示され、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。 [others]
Although the power storage device according to the embodiment of the present invention has been described above, the present invention is not limited to the above embodiment. That is, the embodiments disclosed this time are illustrative in all respects and are not restrictive. The scope of the present invention is indicated by the scope of claims, and includes all modifications within the meaning and scope of equivalence to the scope of claims.
　実施の形態では、締結部８２の基部８２４及び延設部８３の延設方向の全体が第一インサート部９１である場合を例示した。しかしながら、延設方向において、基部８２４及び延設部８３のそれぞれの一部のみが第一インサート部であってもよい。 In the embodiment, the case where the base 824 of the fastening portion 82 and the extending portion 83 in the extending direction is entirely the first insert portion 91 has been exemplified. However, in the extension direction, only a portion of each of the base portion 824 and the extension portion 83 may be the first insert portion.
　実施の形態では、外部端子８１の対向部８２５が第二インサート部９２を有している場合を例示したが、対向部８２５は蓋体１２に埋設されていなくてもよい。 In the embodiment, the facing portion 825 of the external terminal 81 has the second insert portion 92 , but the facing portion 825 does not have to be embedded in the lid 12 .
　実施の形態では、蓋体１２の一部が内方に配置される貫通孔８２４ａ、８２５ａを、第一インサート部９１及び第二インサート部９２のそれぞれが有する場合を例示した。しかしながら、第一インサート部及び第二インサート部の一方のみが貫通孔を少なくとも１つ有していればよいし、第一インサート部及び第二インサート部のそれぞれが貫通孔を有していなくてもよい。また、貫通孔は、例えば楕円形や、多角形などの、円形以外の形状であってもよい。 In the embodiment, the case where the first insert part 91 and the second insert part 92 each have the through holes 824a, 825a through which a part of the lid body 12 is arranged is exemplified. However, it suffices that only one of the first insert part and the second insert part has at least one through hole, and even if each of the first insert part and the second insert part does not have a through hole good. Also, the through-hole may have a shape other than circular, such as elliptical or polygonal.
　実施の形態では、第一インサート部９１が蓋体１２の外面に沿って配置されている場合を例示した。しかしながら、第一インサート部９１は、蓋体１２の外面に沿って配置されていなくてもよい。例えば、第一インサート部は、第二インサート部と同様に、蓋体の辺部から内方に向けて突出した梁部に埋設されてもよい。 In the embodiment, the case where the first insert portion 91 is arranged along the outer surface of the lid body 12 is exemplified. However, the first insert portion 91 does not have to be arranged along the outer surface of the lid 12 . For example, like the second insert, the first insert may be embedded in a beam protruding inward from the side of the lid.
　実施の形態では、第一インサート部９１に延設部８３の先端面（Ｘ軸プラス方向の端面）が含まれている場合を例示したが、延設部８３の先端面は蓋体１２から露出していてもよい。 In the embodiment, the first insert portion 91 includes the front end surface of the extension portion 83 (the end surface in the positive direction of the X-axis), but the front end surface of the extension portion 83 is exposed from the lid body 12. You may have
　実施の形態では、基部８２４のＹ軸プラス方向の主面と、延設部８３のＹ軸プラス方向の主面とが辺部１２３から露出している場合を例示した。しかしながら、基部のＹ軸プラス方向の主面と、延設部のＹ軸プラス方向の主面とが辺部に埋設されてもよい。この場合、締結部の基部及び延設部では、一対の主面のそれぞれであって、延設方向（Ｘ軸方向）における全体を第一インサート部９１としてもよい。これにより、締結時に作用する応力をより広範囲にわたって蓋体に分散できる。 In the embodiment, the main surface of the base portion 824 in the positive Y-axis direction and the main surface of the extension portion 83 in the positive Y-axis direction are exposed from the side portion 123 . However, the main surface of the base portion in the positive Y-axis direction and the main surface of the extension portion in the positive Y-axis direction may be embedded in the side portion. In this case, each of the pair of main surfaces of the base portion and the extension portion of the fastening portion may be the first insert portion 91 as a whole in the extension direction (X-axis direction). Thereby, the stress acting at the time of fastening can be distributed to the lid over a wider range.
　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 components included in the embodiments and their modifications are also included within the scope of the present invention.
　本発明は、リチウムイオン二次電池などの蓄電素子を備えた蓄電装置に適用できる。 The present invention can be applied to a power storage device having a power storage element such as a lithium ion secondary battery.
１　蓄電装置
１０　外装体
１１　外装本体部
１２　蓋体
２０　蓄電ユニット
２１　蓄電素子
２２　収容部
２３　第一部材
２４　第二部材
２５　取付面
２６、２６ａ、２６ｂ、２６ｃ　ボス部
２７　ヒューズ取付部
２８、２８ａ、２８ｂ、２８ｃ　バスバー取付部
３３、３３ｂ、３３ｃ　バスバー
３４　ヒューズ
３５　制御基板
８１、８１Ｂ　外部端子
８２　締結部
８３、８３ｂ　延設部
８４　屈曲部
８４ａ、８２１ａ、８２２ａ、８２３ａ　取付孔
９１　第一インサート部
９２　第二インサート部
１１１　開口部
１１２　第一壁部
１１３　第二壁部
１１４　第三壁部
１２１　収容凹部
１２２　枠壁部
１２３、１２４　辺部
１２５　小蓋
１２６　梁部
２１０　容器
２２０　電極端子
２３１、２４１　第一側壁部
２３２、２４２　第二側壁部
２３３、２４３　底壁部
２３４　切欠
８２１、８２２　側壁部
８２３　天面部
８２４、８２４ｂ　基部
８２４ａ、８２５ａ　貫通孔
８２５　対向部
Ｓ　間隔 1 electricity storage device 10 exterior body 11 exterior main body 12 lid 20 electricity storage unit 21 electricity storage element 22 housing portion 23 first member 24 second member 25 mounting surfaces 26, 26a, 26b, 26c boss portion 27 fuse mounting portions 28, 28a, 28b, 28c Busbar mounting portions 33, 33b, 33c Busbar 34 Fuse 35 Control board 81, 81B External terminal 82 Fastening portion 83, 83b Extension portion 84 Bending portion 84a, 821a, 822a, 823a Mounting hole 91 First insert portion 92 Second Second insert portion 111 Opening 112 First wall portion 113 Second wall portion 114 Third wall portion 121 Accommodating recess 122 Frame wall portions 123, 124 Side portion 125 Small lid 126 Beam portion 210 Container 220 Electrode terminals 231, 241 First side wall Parts 232, 242 Second side wall parts 233, 243 Bottom wall part 234 Notches 821, 822 Side wall part 823 Top surface parts 824, 824b Base parts 824a, 825a Through hole 825 Opposing part S Spacing

Claims (6)

  1. 　蓄電素子と、
    　前記蓄電素子を収容する外装体と、
    　前記外装体の外部に配置された外部機器と前記蓄電素子とを電気的に接続するための導電部材とを備え、
    　前記外装体は、前記蓄電素子を収容する外装本体部と、前記外装本体部を閉塞するとともに前記導電部材を保持する蓋体とを備え、
    　前記導電部材は、前記蓋体から突出し、前記外部機器に接続された外部導電体が締結される締結部と、前記締結部の基部から当該締結部の突出方向とは交差する方向に当該基部と同一平面上に延設する延設部とを備え、
    　前記締結部の基部及び前記延設部は、前記蓋体にインサート成形により埋設された第一インサート部を有する
    　蓄電装置。     a storage element;
    an exterior body that houses the power storage element;
    A conductive member for electrically connecting an external device arranged outside the exterior body and the power storage element,
    The exterior body includes an exterior main body that houses the power storage element, and a lid that closes the exterior main body and holds the conductive member,
    The conductive member protrudes from the lid body, and includes a fastening portion to which an external conductor connected to the external device is fastened, and a base portion extending from the base portion of the fastening portion to the base portion in a direction intersecting the projecting direction of the fastening portion. and an extension part extending on the same plane,
    A power storage device, wherein the base portion and the extension portion of the fastening portion have a first insert portion embedded in the lid body by insert molding.
  2. 　前記締結部の基部及び前記延設部は、当該延設部の延設方向における全体が前記第一インサート部である
    　請求項１に記載の蓄電装置。     The power storage device according to claim 1, wherein the base portion of the fastening portion and the extension portion are the first insert portion as a whole in the extension direction of the extension portion.
  3. 　前記導電部材は、前記基部に対向する対向部を有し、
    　前記対向部は、前記蓋体にインサート成形により埋設された第二インサート部を有する
    　請求項１または２に記載の蓄電装置。     The conductive member has a facing portion facing the base,
    The power storage device according to claim 1 or 2, wherein the facing portion has a second insert portion embedded in the lid by insert molding.
  4. 　前記第一インサート部は、貫通孔を有しており、
    　当該貫通孔内に前記蓋体の一部が配置されている
    　請求項１～３のいずれか一項に記載の蓄電装置。     The first insert portion has a through hole,
    The power storage device according to any one of claims 1 to 3, wherein a portion of the lid body is arranged in the through hole.
  5. 　前記第一インサート部は、前記蓋体の外面に沿って配置されている
    　請求項１～４のいずれか一項に記載の蓄電装置。     The power storage device according to any one of claims 1 to 4, wherein the first insert portion is arranged along the outer surface of the lid.
  6. 　前記第一インサート部は、前記延設部の先端面を含む
    　請求項１～５のいずれか一項に記載の蓄電装置。     The power storage device according to any one of claims 1 to 5, wherein the first insert portion includes a tip surface of the extension portion.
PCT/JP2022/012282 2021-04-27 2022-03-17 Power storage device WO2022230435A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2021-074785 2021-04-27
JP2021074785 2021-04-27

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003272575A (en) * 2002-03-20 2003-09-26 Japan Storage Battery Co Ltd Manufacturing method of cover for storage battery
JP2004108533A (en) * 2002-09-20 2004-04-08 Nok Corp Gasket
WO2011078211A1 (en) * 2009-12-24 2011-06-30 株式会社Ｇｓユアサ Lid for storage battery, injection-molding method for the lid for storage battery, and storage battery with the lid for storage battery

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003272575A (en) * 2002-03-20 2003-09-26 Japan Storage Battery Co Ltd Manufacturing method of cover for storage battery
JP2004108533A (en) * 2002-09-20 2004-04-08 Nok Corp Gasket
WO2011078211A1 (en) * 2009-12-24 2011-06-30 株式会社Ｇｓユアサ Lid for storage battery, injection-molding method for the lid for storage battery, and storage battery with the lid for storage battery

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