WO2022230428A1 - Power storage device - Google Patents

Power storage device Download PDF

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Publication number
WO2022230428A1
WO2022230428A1 PCT/JP2022/012243 JP2022012243W WO2022230428A1 WO 2022230428 A1 WO2022230428 A1 WO 2022230428A1 JP 2022012243 W JP2022012243 W JP 2022012243W WO 2022230428 A1 WO2022230428 A1 WO 2022230428A1
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WO
WIPO (PCT)
Prior art keywords
power storage
busbar
terminal
conductive member
storage device
Prior art date
Application number
PCT/JP2022/012243
Other languages
French (fr)
Japanese (ja)
Inventor
謙志 河手
延言 柴田
彬 和田
隼輔 奥田
一志 渡邊
Original Assignee
株式会社Ｇｓユアサ
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社Ｇｓユアサ filed Critical 株式会社Ｇｓユアサ
Priority to JP2023517142A priority Critical patent/JPWO2022230428A1/ja
Publication of WO2022230428A1 publication Critical patent/WO2022230428A1/en

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    • 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
    • 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
    • H01G11/78—Cases; Housings; Encapsulations; Mountings
    • 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
    • H01M50/296—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
    • 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.
  • a power storage device that includes a terminal fixed at a predetermined position of the power storage device, a power storage element, and a conductive member that connects the terminal and the power storage element.
  • the present invention has been made by the inventor of the present application by focusing on the above problem, and aims to suppress deterioration in the reliability of a power storage device.
  • a power storage device is a power storage device including a power storage element, comprising a terminal, a conductive member electrically connected to the power storage element and fastened to the terminal, and one of the terminal and the conductive member.
  • a fixing portion that fixes the power storage device to a predetermined position, and a holding portion that holds the other of the terminal and the conductive member. It has a slidable structure.
  • the power storage device of the present invention According to the power storage device of the present invention, deterioration in reliability of the power storage device can be suppressed.
  • 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 a state after assembling the external terminal, the bus bar, and the bus bar mounting portion according to the embodiment.
  • FIG. 5 is a perspective view showing a busbar mounting portion according to the embodiment.
  • FIG. 6 is a partial cross-sectional view showing a state after assembly of the external terminals, busbars, and busbar mounting portions according to the embodiment.
  • FIG. 7 is a partial cross-sectional view showing a state after assembly of external terminals, bus bars, and holding portions according to a modification.
  • a power storage device is a power storage device including a power storage element, comprising a terminal, a conductive member electrically connected to the power storage element and fastened to the terminal, and one of the terminal and the conductive member.
  • a fixing portion that fixes the power storage device to a predetermined position, and a holding portion that holds the other of the terminal and the conductive member. It has a slidable structure.
  • one of the terminal and the conductive member is fixed by the fixing portion, and the other is slidably held by the holding portion with respect to one before fastening. Therefore, when the terminal and the conductive member are fastened together, the other slides due to the fastening force. As a result, stress concentration on the conductive member or terminal can be alleviated, and damage to the conductive member or terminal can be suppressed. Therefore, deterioration in reliability of the power storage device can be suppressed.
  • the holding part may have a structure in which the other is fitted.
  • the other side since the other side is fitted to the holding portion, the movement of the other side can be restricted to some extent before fastening. Therefore, it is possible to enhance the stability of the fastening work. If the fastening work can be made more stable, the deterioration of the reliability of the power storage device can be further suppressed.
  • the holding part may have a structure that permits rotation of the other around a direction that intersects the other sliding direction in a state before the conductive member is fastened to the terminal.
  • the holding part allows the rotation of the other, the other can rotate in addition to sliding at the time of fastening. Therefore, it is possible to increase the degree of freedom in the movement direction of the other at the time of fastening. As a result, stress concentration on the conductive member or terminal can be further alleviated, and damage to the conductive member or terminal can be suppressed more reliably. Therefore, deterioration in reliability of the power storage device can be further suppressed.
  • the other sliding direction of the holding portion may be a direction along the tightening direction at the time of tightening.
  • the other slide direction in the holding part and the fastening direction at the time of fastening are directions along each other, the other can be smoothly slid at the time of fastening.
  • stress concentration on the terminal or the conductive member can be further alleviated, and damage to the terminal or the conductive member can be suppressed more reliably. Therefore, deterioration in reliability of the power storage device can be further suppressed.
  • the power storage device includes a fastening member for fastening the conductive member, and the holding portion slidably holds the conductive member and approaches the fastening member of the conductive member when the conductive member is fastened to the terminal by the fastening member. Allows sliding in any direction.
  • the holding part allows the conductive member to slide in a direction approaching the fastening member when the conductive member is fastened to the terminal, the fastening causes the conductive member to move closer to the fastening member. do. That is, since the conductive member can be positively moved by fastening, stress concentration on the conductive member can be alleviated. Therefore, deterioration in reliability of the power storage device can be further suppressed.
  • the holding part slidably holds the conductive member, and the conductive member is assembled with a cable electrically connected to the storage element.
  • the conductive member to which the cable is assembled is slidably held by the holding portion, it is possible to hold the conductive member, which is easily moved by deformation of the cable, while allowing sliding. Therefore, the conductive member can be held smoothly even when the cable is assembled.
  • 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 and the direction in which the first member and the second member forming the accommodating portion are arranged are defined as the Y-axis direction.
  • a Z-axis direction is defined as a direction in which the main body and the outer lid are arranged in the exterior body of the power storage device, a direction in which the housing is inserted into and removed from the main body, or a vertical 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. used as Examples of such vehicles include electric vehicles (EV), hybrid electric vehicles (HEV), plug-in hybrid electric vehicles (PHEV), and gasoline vehicles. Electric trains, monorails, and maglev trains are exemplified as railway vehicles for the electric railway.
  • the power storage device 1 can also be used as a stationary battery or the like for home use or for a power generator.
  • 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 a body portion 11 that accommodates the power storage unit 20 and an outer lid 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 body part 11 is a bottomed rectangular tubular member with an open top, and the open part is the opening 111 .
  • the opening 111 has a substantially rectangular shape in plan view.
  • the body portion 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 on the negative Z-axis direction side. It has a part 114 .
  • the first wall portion 112 is a rectangular plate-like short side surface portion that forms the short side surface of the 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 main body portion 11 .
  • the third wall portion 114 is a rectangular plate-like bottom wall portion that forms the bottom surface of the main body portion 11 .
  • the outer lid 12 is a member that closes the opening 111 of the main body 11 and is joined to the main body 11 while covering the opening 111 of the main body 11 .
  • the outer lid 12 has a pair of external terminals 81 (positive electrode side and negative electrode side).
  • the external terminal 81 is electrically connected to the plurality of power storage elements 21 included in the power storage unit 20 via each bus bar 33 , fuse 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.
  • 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 main body 11 and the outer lid 12 of the exterior body 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 member such as a composite material thereof, or a metal coated with an insulating coating.
  • the exterior body 10 thereby avoids contact of the power storage element 21 and the like with external metal members and the like.
  • the exterior body 10 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.
  • each external terminal 81 is integrated with the resin forming the outer lid 12 by insert molding. That is, a part of each external terminal 81 is in direct contact with the resin forming the outer lid 12, and is integrated while being covered with the resin.
  • the portion of the outer lid 12 that is in close contact with each external terminal 81 is the fixing portion 121 that fixes each external terminal 81 .
  • An external device is electrically connected to an exposed portion of each external terminal 81 protruding from the outer cover 12 in the Z-axis positive direction.
  • a bus bar 33 is joined to a portion of each external terminal 81 exposed from the outer cover 12 in the negative Z-axis direction.
  • the fixing portion 121 is formed by insert molding. . It may be fixed by fitting, fixed by a fastening method such as screws or caulking, fixed by welding, or fixed by an adhesive.
  • 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 section 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 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 .
  • 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.
  • one of the pair of electrode terminals 220 of the storage element 21 at the end may be extended to an external terminal provided in the storage device 1 and connected (joined) to the external terminal, or may be connected (joined) to the external terminal. It may be electrically connected to the external terminal by a conductive member, or the electrode terminal 220 itself may serve as the external terminal.
  • 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 (stacked) electrode formed by stacking a plurality of flat plate-shaped electrode plates.
  • the electrode body may have any form, such as a body or a bellows-shaped electrode body in which an electrode plate is folded into a bellows shape.
  • the 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.
  • 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 are polycarbonate (PC), polypropylene (PP), polyethylene (PE), polyphenylene sulfide resin (PPS), polyphenylene ether (PPE (including modified PPE)), polyethylene terephthalate (PET ), polybutylene terephthalate (PBT), polyetheretherketone (PEEK), tetrafluoroethylene-perfluoroalkyl vinyl ether (PFA), polytetrafluoroethylene (PTFE), polyethersulfone (PES), ABS resin, or It is formed of an insulating member such as a composite material thereof.
  • the first member 23 and the second member 24 prevent the plurality of storage elements 21 from being electrically connected to an external conductive member such as a metal member.
  • the member 23 and the second member 24 may be made of a conductive member such as metal.
  • 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 .
  • FIG. 4 is a perspective view showing the assembled state of the external terminal 81, the busbar 33c, and the busbar mounting portion 28c according to the embodiment.
  • FIG. 5 is a perspective view showing the busbar mounting portion 28c according to the embodiment.
  • FIG. 6 is a partial cross-sectional view showing the assembled state of the external terminal 81, the busbar 33c, and the busbar mounting portion 28c according to the embodiment.
  • illustration of the fixing portion 121 for fixing the external terminal 81 in the outer lid 12 is omitted.
  • the external terminal 81 is made of sheet metal and has an embedded portion 811 and an exposed portion 812 .
  • the embedded portion 811 is a plate-like portion embedded in the fixed portion 121 (see FIG. 2) in a posture parallel to the XZ plane.
  • the exposed portion 812 is a rectangular plate-shaped portion that is bent from the upper end portion of the embedded portion 811 so as to be exposed from the fixed portion 121 and parallel to the XY plane.
  • a through hole 813 is formed in the exposed portion 812 with the Z-axis direction as the axial direction.
  • the bus bar 33c is made of sheet metal and has a first fastening portion 331 and a second fastening portion 332.
  • the first fastening portion 331 has a rectangular plate-shaped first plate portion 333 parallel to the XZ plane, and a first bolt portion 334 protruding from the first plate portion 333 in the Y-axis negative direction.
  • the terminal 91 of the cable 90 (see FIG. 2) extending from the control board 35 is engaged with the first bolt portion 334 and the nut 335 is tightened, so that the terminal 91 of the cable 90 is joined to the first bolt portion 334 ( connection).
  • the second fastening portion 332 includes a rectangular flat plate portion 336 that is parallel to the XY plane and is bent from the upper end portion of the first plate portion 333, and a second plate portion 336 that protrudes from the second plate portion 336 in the Z-axis plus direction. and a bolt portion 337 .
  • the exposed portion 812 of the external terminal 81 is joined (connected) to the second bolt portion 337 by fastening the nut 338 while the second bolt portion 337 passes through the through hole 813 of the external terminal 81 .
  • the busbar mounting portion 28c has a structure that holds the busbar 33c slidably with respect to the external terminal 81 before the busbar 33c is fastened to the external terminal 81 . That is, the busbar mounting portion 28c is an example of a holding portion that holds the busbar 33c. Specifically, the busbar attachment portion 28c has a pedestal portion 281 and a pair of ribs 282 .
  • the pedestal portion 281 is a portion that supports the first fastening portion 331 of the busbar 33c, and includes a wall body 285, a pair of upper contact portions 283, and a pair of lower contact portions 284.
  • the wall body 285 is a wall formed in a substantially U shape with an open top in a plan view (viewed in the Y-axis direction), and stands upright from the mounting surface 25 .
  • the interval X1 between the portions on both sides in the X-axis direction is larger than the width X2 in the X-axis direction of the first plate portion 333 of the first fastening portion 331 (see FIG. 6).
  • the pair of upper contact portions 283 are portions that protrude inward from the pair of upper end portions of the wall body 285 and contact the main surface of the first plate portion 333 of the first fastening portion 331 in the negative Y-axis direction. contact, and restricts the movement of the first plate portion 333 in the Y-axis minus direction.
  • the pair of lower contact portions 284 are portions that protrude inward from a pair of corner portions at the lower end of the wall body 285, and are located on the first plate portion 333 of the first fastening portion 331 in the negative Y-axis direction. It abuts on the main surface and restricts the movement of the first plate portion 333 in the Y-axis minus direction.
  • the pair of ribs 282 are ribs erected from the mounting surface 25 in the negative Y-axis direction and extending in the Z-axis direction.
  • a pair of ribs 282 are arranged at a predetermined interval in the X-axis direction.
  • the upper end of each rib 282 forms an inclined surface 282a whose height (the length in the Y-axis direction) gradually decreases as it progresses upward.
  • a flat surface 282b having a constant height is formed in the portion of each rib 282 in the negative direction of the Z-axis from the inclined surface 282a.
  • the distance between the flat surface 282b and each lower contact portion 284 is such that the first plate portion 333 of the first fastening portion 331 is fitted.
  • the distance between each upper contact portion 283 and the inclined surface 282a gradually increases upward. Therefore, when the first plate portion 333 is inserted into the pedestal portion 281 from above, first, the lower end portion of the first plate portion 333 smoothly enters the space between each upper contact portion 283 and the inclined surface 282a. . After that, the lower end of the first plate portion 333 reaches the flat surface 282b while being gradually pressed against the upper contact portions 283 by the inclined surface 282a, and slides on the flat surface 282b. Next, when the lower end portion of the first plate portion 333 reaches each lower contact portion 284, the lower contact portion 284 and the flat surface 282b engage with each other while being sandwiched therebetween.
  • the first plate portion 333 is sandwiched between the upper contact portions 283 and the lower contact portions 284 and the flat surface 282b to restrict movement in the Y-axis direction. Movement of the one plate portion 333 in the Z-axis direction is not restricted.
  • the busbar mounting portion 28c holds the busbar 33c slidably in the Z-axis direction. More specifically, the busbar mounting portion 28c allows the busbar 33c to slide in the direction (Z-axis plus direction) approaching the nut 338 when the busbar 33c is fastened to the external terminal 81 by the nut 338, which is a fastening member. Allowed.
  • the interval X1 between the portions on both sides in the X-axis direction is larger than the width X2 of the first plate portion 333 . Therefore, it can be said that the bus bar 33c is held slidably in the X-axis direction by the difference between the interval X1 and the width X2. This difference also allows the bus bar 33c to rotate (rotating direction C1) about the Y-axis direction.
  • the rotation center of the rotation direction C1 can also be said to be a direction that intersects the sliding direction (the Z-axis direction or the X-axis direction) of the busbar 33c.
  • the busbar 33c is held by the busbar mounting portion 28c before fastening.
  • the second plate portion 336 of the busbar 33c and the exposed portion 812 of the external terminal 81 are overlapped, and the second bolt portion 337 of the busbar 33c passes through the through hole 813 of the exposed portion 812. .
  • the terminal 91 of the cable 90 is fastened to the first bolt portion 334 of the busbar 33c. It may move in the X-axis direction or rotate in the rotation direction C1. In this case, since the busbar mounting portion 28c allows these to move, even the busbar 33c to which the cable 90 is attached can be held smoothly.
  • the fastening force pulls the bus bar 33c in the fastening direction (Z-axis plus direction). Since the busbar mounting portion 28c is allowed to move in the Z-axis direction, the busbar 33c slides in the positive Z-axis direction and comes into contact with the exposed portion 812 of the external terminal 81 to be fastened. Since the busbar 33c slides during fastening in this manner, stress concentration on the busbar 33c is alleviated.
  • the external terminal 81 is fixed by the fixing portion 121, and the busbar 33c in a state before fastening is slidably held with respect to the external terminal 81 by the busbar mounting portion 28c. . Therefore, when the external terminal 81 and the busbar 33c are fastened together, the fastening force causes the busbar 33c to slide. As a result, stress concentration on the busbar 33c can be alleviated, and damage to the busbar 33c can be suppressed. Therefore, deterioration in reliability of the power storage device 1 can be suppressed.
  • busbar 33c Since the busbar 33c is fitted to the busbar mounting portion 28c, the movement of the busbar 33c can be restricted to some extent before fastening. Therefore, it is possible to enhance the stability of the fastening work. If the fastening work can be made more stable, the deterioration of the reliability of the power storage device 1 can be further suppressed.
  • busbar mounting portion 28c allows the rotation of the busbar 33c, the busbar 33c can rotate as well as slide when tightened. Therefore, it is possible to increase the degree of freedom in the movement direction of the bus bar 33c during fastening. As a result, stress concentration on busbar 33c can be further alleviated, and damage to busbar 33c can be more reliably suppressed. Therefore, deterioration in reliability of the power storage device 1 can be further suppressed.
  • the busbar 33c can slide smoothly at the time of fastening.
  • stress concentration on busbar 33c can be further alleviated, and damage to busbar 33c can be more reliably suppressed. Therefore, deterioration in reliability of the power storage device 1 can be further suppressed.
  • the busbar mounting portion 28c allows the busbar 33c to slide in a direction approaching the nut 338 when the busbar 33c is fastened to the external terminal 81, so that the fastening causes the busbar 33c to move closer to the nut 338. . That is, since the busbar 33c can be positively moved by fastening, the stress concentration on the busbar 33c can be further alleviated. Therefore, deterioration in reliability of the power storage device 1 can be further suppressed.
  • the busbar 33c to which the cable 90 is assembled is slidably held by the busbar mounting portion 28c, the busbar 33c, which is easily moved due to deformation of the cable 90, can be held while allowing sliding. Therefore, even with the cable 90 attached, the bus bar 33c can be held smoothly.
  • the external terminal 81 terminal
  • the busbar 33c conductive member
  • the holding portion busbar mounting portion 28c
  • the conductive member may be fixed and the terminals may be slidably held.
  • FIG. 7 is a partial cross-sectional view showing the assembled state of the external terminal 81d, the bus bar 33d, and the holding portion 60d according to the modification.
  • the external terminal 81d is formed of sheet metal, and includes a first flat plate portion 815d parallel to the XY plane and a first flat plate portion 815d that is bent upward from the end of the first flat plate portion 815d in the positive direction of the Y axis and parallel to the XZ plane. It has two flat plate portions 816d.
  • the first flat plate portion 815d is formed with a through hole 817d whose axial direction is the Z-axis direction.
  • the bus bar 33d has a flat plate portion 37d and a bolt portion 38d projecting in the positive Z-axis direction from a portion of the flat plate portion 37d.
  • the flat plate portion 37d is integrated with the resin forming the exterior body or housing portion by insert molding.
  • a portion of the bus bar 33d is in direct contact with the resin that forms the exterior body or housing portion, and is integrated while being covered with the resin.
  • the fixing portion 39d that fixes the busbar 33d is a portion of the exterior body or housing that is in close contact with the busbar 33d.
  • the holding portion 60d has a structure that holds the external terminal 81d slidably with respect to the busbar 33d before the external terminal 81d is fastened to the busbar 33d.
  • the holding portion 60d has a pair of clamping portions 61d erected from the mounting surface 25d of the exterior body or housing portion.
  • the pair of sandwiching portions 61d are arranged so as to sandwich the bus bar 33d in the X-axis direction.
  • Each holding portion 61d extends in the Z-axis direction, and an inwardly projecting contact portion 283d is provided at the upper end portion thereof.
  • Each contact portion 283d contacts the second flat plate portion 816d of the external terminal 81d.
  • the second flat plate portion 816d is fitted while being sandwiched between the contact portions 283d and the mounting surface 25d. During this fitting, the second flat plate portion 816d is only sandwiched between the contact portions 283d and the mounting surface 25d, and the movement of the external terminal 81d in the Z-axis direction is not restricted.
  • a fastening operation between the bus bar 33d and the external terminal 81d will be described.
  • the external terminal 81d is held by the holding portion 60d.
  • the through hole 817d of the external terminal 81d is penetrated by the bolt portion 38d of the bus bar 33d.
  • the first flat plate portion 815d of the external terminal 81d is held by the holding portion 60d in a state separated from the flat plate portion 37d of the busbar 33d.
  • the external terminal 81d is allowed to move in the Z-axis direction by the holding portion 60d, so it slides in the negative Z-axis direction. Therefore, the first flat plate portion 815d of the external terminal 81d is overlapped and fastened to the flat plate portion 37d of the bus bar 33d. Since the external terminal 81d slides during fastening in this manner, stress concentration on the external terminal 81d is alleviated.
  • the busbar mounting portion 28c which is the holding portion, allows the busbar 33c to slide and rotate in the Z-axis direction and the X-axis direction. may only be allowed. In this case, it is preferable that the holding portion allows sliding in the fastening direction of the busbar.
  • the busbar mounting portion 28c is exemplified as the holding portion. It doesn't matter how you like it.
  • the holding portion 60d is used as an example of the holding portion. Any structure may be used.
  • busbar mounting portion 28c slidably holds the busbar 33c, but other busbar mounting portions may also slidably hold the busbar.
  • the busbar 33c is exemplified as the conductive member according to the present invention, but the conductive member can include cables, fuses, and the like.
  • the external terminal 81 is exemplified as a terminal according to the present invention, but the terminal may include an internal terminal or the like.
  • the fixing portion 121 is provided on the outer lid 12 of the exterior body 10 as an example, but the fixing portion may be provided on the main body portion of the exterior body. may be provided in a member that constitutes the Similarly, in the embodiment, the busbar mounting portion 28c as the holding portion is provided in the housing portion 22, but the holding portion is provided in a member other than the housing portion 22, which constitutes the power storage device. good too. In the embodiment, the case where the fixing portion and the holding portion are provided in separate members has been exemplified, but the fixing portion and the holding portion may be provided in one member.
  • the present invention can be applied to a power storage device having a power storage element such as a lithium ion secondary battery.
  • Power storage device 10 Exterior body 11 Main body 12 Outer lid 20 Power storage unit 21 Power storage element 22 Storage part 23 First member 24 Second members 25, 25d Mounting surfaces 26, 26a, 26b, 26c Boss part 27 Fuse mounting parts 28, 28a , 28b Busbar mounting portion 28c Busbar mounting portion (holding portion) 33, 33b, 33c, 33d Bus bar (conductive member) 34 fuse 35 control board 37d flat plate portion 38d bolt portion 39d, 121 fixed portion 60d holding portion 61d holding portion 81, 81d external terminal (terminal) 90 cable 91 terminal 111 opening 112 first wall 113 second wall 114 third wall 210 container 220 electrode terminals 231, 241 first side walls 232, 242 second side walls 233, 243 bottom wall 234 notch 281 Base portion 282 Rib 282a Inclined surface 282b Flat surface 283 Upper contact portion 283d Contact portion 284 Lower contact portion 285 Wall body 331 First fastening portion 332 Second fastening portion 333 First plate portion 334 First bolt portions 335, 3

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  • Chemical & Material Sciences (AREA)
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  • Electrochemistry (AREA)
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Abstract

A power storage device (1) comprises: a terminal (81); a conductive member (33c) that is electrically connected to a power storage element (21) and fastened to the terminal (81); a fixing section (121) for fixing one of the terminal (81) and the conductive member (33c) to a predetermined position on the power storage device (1); and a holding section (28c) for holding the other of the terminal (81) and the conductive member (33c). The holding section (28c) has a structure that makes it possible for one of the conductive member (33c) and the terminal (81) to slide with respect to the other prior to fastening of the conductive member (33c) to the terminal (81).

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、蓄電装置の所定の位置に固定された端子と、蓄電素子と、端子及び蓄電素子を接続する導電部材とを備えたものが知られている。 Conventionally, a power storage device is known that includes a terminal fixed at a predetermined position of the power storage device, a power storage element, and a conductive member that connects the terminal and the power storage element.
特開２０１９－１２５４７７号公報JP 2019-125477 A
　上記従来の蓄電装置では、端子と導電部材とを締結する際に端子が所定の位置で固定されると、締結によって導電部材の一部に応力が集中することで機械的な負荷が増大し損傷を招き、結果的に蓄電装置の信頼性を損なうおそれがある。 In the above-described conventional power storage device, if the terminal is fixed at a predetermined position when the terminal and the conductive member are fastened together, stress is concentrated on a portion of the conductive member due to the fastening, which increases the mechanical load and damages the terminal. As a result, the reliability of the power storage device may be impaired.
　本発明は、本願発明者が上記課題に新たに着目することによってなされたものであり、蓄電装置の信頼性の低下を抑制することを目的とする。 The present invention has been made by the inventor of the present application by focusing on the above problem, and aims to suppress deterioration in the reliability of a power storage device.
　本発明の一態様に係る蓄電装置は、蓄電素子を有する蓄電装置であって、端子と、蓄電素子に電気的に接続されるとともに端子に締結される導電部材と、端子及び導電部材の一方を蓄電装置の所定位置に固定する固定部と、端子及び導電部材の他方を保持する保持部とを備え、保持部は、導電部材が端子に締結される前の状態では、他方を一方に対してスライド自在な構造を有する。 A power storage device according to an aspect of the present invention is a power storage device including a power storage element, comprising a terminal, a conductive member electrically connected to the power storage element and fastened to the terminal, and one of the terminal and the conductive member. A fixing portion that fixes the power storage device to a predetermined position, and a holding portion that holds the other of the terminal and the conductive member. It has a slidable structure.
　本発明における蓄電装置によれば、蓄電装置の信頼性の低下を抑制できる。 According to the power storage device of the present invention, deterioration in reliability of the power storage device can be suppressed.
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、バスバー及びバスバー取付部の組み立て後の状態を示す斜視図である。FIG. 4 is a perspective view showing a state after assembling the external terminal, the bus bar, and the bus bar mounting portion according to the embodiment. 図５は、実施の形態に係るバスバー取付部を示す斜視図である。FIG. 5 is a perspective view showing a busbar mounting portion according to the embodiment. 図６は、実施の形態に係る外部端子、バスバー及びバスバー取付部の組み立て後の状態を示す部分断面図である。FIG. 6 is a partial cross-sectional view showing a state after assembly of the external terminals, busbars, and busbar mounting portions according to the embodiment. 図７は、変形例に係る外部端子、バスバー及び保持部の組み立て後の状態を示す部分断面図である。FIG. 7 is a partial cross-sectional view showing a state after assembly of external terminals, bus bars, and holding portions according to a modification.
　本発明の一態様に係る蓄電装置は、蓄電素子を有する蓄電装置であって、端子と、蓄電素子に電気的に接続されるとともに端子に締結される導電部材と、端子及び導電部材の一方を蓄電装置の所定位置に固定する固定部と、端子及び導電部材の他方を保持する保持部とを備え、保持部は、導電部材が端子に締結される前の状態では、他方を一方に対してスライド自在な構造を有する。 A power storage device according to an aspect of the present invention is a power storage device including a power storage element, comprising a terminal, a conductive member electrically connected to the power storage element and fastened to the terminal, and one of the terminal and the conductive member. A fixing portion that fixes the power storage device to a predetermined position, and a holding portion that holds the other of the terminal and the conductive member. It has a slidable structure.
　これによれば、端子及び導電部材の一方が固定部で固定され、他方が締結前の状態では保持部により一方に対してスライド自在に保持されている。このため、端子と導電部材とが締結される際には、その締結力によって他方がスライドする。これにより、導電部材または端子に対する応力集中を緩和でき、導電部材または端子の損傷を抑制できる。したがって、蓄電装置の信頼性の低下を抑制できる。 According to this, one of the terminal and the conductive member is fixed by the fixing portion, and the other is slidably held by the holding portion with respect to one before fastening. Therefore, when the terminal and the conductive member are fastened together, the other slides due to the fastening force. As a result, stress concentration on the conductive member or terminal can be alleviated, and damage to the conductive member or terminal can be suppressed. Therefore, deterioration in reliability of the power storage device can be suppressed.
　保持部は、他方が嵌合される構造を有する、としてもよい。 The holding part may have a structure in which the other is fitted.
　これによれば、保持部には他方が嵌合されるので、締結前の状態で他方の移動をある程度規制できる。したがって、締結作業の安定性を高めることができる。締結作業の安定性が高められれば、蓄電装置の信頼性の低下をより抑制できる。 According to this, since the other side is fitted to the holding portion, the movement of the other side can be restricted to some extent before fastening. Therefore, it is possible to enhance the stability of the fastening work. If the fastening work can be made more stable, the deterioration of the reliability of the power storage device can be further suppressed.
　保持部は、導電部材が端子に締結される前の状態では、他方のスライド方向に対して交差する方向を中心とした他方の回転を許容する構造を有する、としてもよい。 The holding part may have a structure that permits rotation of the other around a direction that intersects the other sliding direction in a state before the conductive member is fastened to the terminal.
　これによれば、保持部が他方の回転を許容しているので、締結時においては他方がスライドに加えて回転も可能となる。このため、締結時における他方の移動方向の自由度を高めることができる。これにより、導電部材または端子に対する応力集中をより緩和でき、導電部材または端子の損傷をより確実に抑制できる。したがって、蓄電装置の信頼性の低下をより抑制できる。 According to this, since the holding part allows the rotation of the other, the other can rotate in addition to sliding at the time of fastening. Therefore, it is possible to increase the degree of freedom in the movement direction of the other at the time of fastening. As a result, stress concentration on the conductive member or terminal can be further alleviated, and damage to the conductive member or terminal can be suppressed more reliably. Therefore, deterioration in reliability of the power storage device can be further suppressed.
　保持部における他方のスライド方向は、締結時における締結方向に沿う方向である、としてもよい。 The other sliding direction of the holding portion may be a direction along the tightening direction at the time of tightening.
　これによれば、保持部における他方のスライド方向と、締結時における締結方向とが相互に沿う方向であるので、締結時に他方をスムーズにスライドできる。これにより、端子または導電部材に対する応力集中をより緩和でき、端子または導電部材の損傷をより確実に抑制できる。したがって、蓄電装置の信頼性の低下をより抑制できる。 According to this, since the other slide direction in the holding part and the fastening direction at the time of fastening are directions along each other, the other can be smoothly slid at the time of fastening. As a result, stress concentration on the terminal or the conductive member can be further alleviated, and damage to the terminal or the conductive member can be suppressed more reliably. Therefore, deterioration in reliability of the power storage device can be further suppressed.
　蓄電装置は、導電部材を締結するための締結部材を備え、保持部は、導電部材をスライド自在に保持し、締結部材によって導電部材が端子に締結される際の当該導電部材の締結部材に近づく方向へのスライドを許容している。 The power storage device includes a fastening member for fastening the conductive member, and the holding portion slidably holds the conductive member and approaches the fastening member of the conductive member when the conductive member is fastened to the terminal by the fastening member. Allows sliding in any direction.
　これによれば、保持部は、導電部材が端子に締結される際の当該導電部材の締結部材に近づく方向へのスライドを許容しているので、締結によって導電部材が締結部材に近づくように移動する。つまり、締結により積極的に導電部材を移動できるので、導電部材に対する応力集中をより緩和できる。したがって、蓄電装置の信頼性の低下をより抑制できる。 According to this, since the holding part allows the conductive member to slide in a direction approaching the fastening member when the conductive member is fastened to the terminal, the fastening causes the conductive member to move closer to the fastening member. do. That is, since the conductive member can be positively moved by fastening, stress concentration on the conductive member can be alleviated. Therefore, deterioration in reliability of the power storage device can be further suppressed.
　保持部は、導電部材をスライド自在に保持しており、導電部材には、蓄電素子と電気的に接続されたケーブルが組み付けられている。 The holding part slidably holds the conductive member, and the conductive member is assembled with a cable electrically connected to the storage element.
　これによれば、ケーブルが組み付けられた導電部材が保持部によりスライド自在に保持されるので、ケーブルの変形を受けて移動しやすい導電部材のスライドを許容しながら保持できる。したがって、ケーブルが組み付けられた状態であっても、導電部材をスムーズに保持できる。 According to this, since the conductive member to which the cable is assembled is slidably held by the holding portion, it is possible to hold the conductive member, which is easily moved by deformation of the cable, while allowing sliding. Therefore, the conductive member can be held smoothly even when the cable is assembled.
　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、収容部をなす第一部材と第二部材との並び方向を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外蓋との並び方向、本体部に対する収容部の挿抜方向、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. In addition, the direction in which the plurality of storage elements are arranged and the direction in which the first member and the second member forming the accommodating portion are arranged are defined as the Y-axis direction. A Z-axis direction is defined as a direction in which the main body and the outer lid are arranged in the exterior body of the power storage device, a direction in which the housing is inserted into and removed from the main body, or a vertical 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）及びガソリン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、モノレール及びリニアモーターカーが例示される。蓄電装置１は、家庭用または発電機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 such vehicles include electric vehicles (EV), hybrid electric vehicles (HEV), plug-in hybrid electric vehicles (PHEV), and gasoline vehicles. Electric trains, monorails, and maglev trains are exemplified as railway vehicles for the electric railway. The power storage device 1 can also be used as a stationary battery or the like for home use or for a power generator.
　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を収容する本体部１１と、蓄電ユニット２０の上方を覆う外蓋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 a body portion 11 that accommodates the power storage unit 20 and an outer lid 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.
　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。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、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、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、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 body part 11 is a bottomed rectangular tubular member with an open top, and the open part is the opening 111 . The opening 111 has a substantially rectangular shape in plan view. The body portion 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 on the negative Z-axis direction side. It has a part 114 . Specifically, the first wall portion 112 is a rectangular plate-like short side surface portion that forms the short side surface of the 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 main body portion 11 . The third wall portion 114 is a rectangular plate-like bottom wall portion that forms the bottom surface of the main body portion 11 .
　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 main body 11, in addition to the power storage unit 20, a plurality of bus bars 33, fuses 34, and control boards 35 held by the power storage unit 20 are accommodated.
　外蓋１２は、本体部１１の開口部１１１を閉塞する部材であり、本体部１１の開口部１１１を覆った状態で本体部１１に接合されている。外蓋１２は、一対（正極側及び負極側）の外部端子８１を有している。外部端子８１は、各バスバー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。 The outer lid 12 is a member that closes the opening 111 of the main body 11 and is joined to the main body 11 while covering the opening 111 of the main body 11 . The outer lid 12 has a pair of external terminals 81 (positive electrode side and negative electrode side). The external terminal 81 is electrically connected to the plurality of power storage elements 21 included in the power storage unit 20 via each bus bar 33 , fuse 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.
　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の本体部１１及び外蓋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部材、または、絶縁塗装をした金属等により形成されている。外装体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、蓄電素子２１等の電気的絶縁性が保たれる構成であれば、外装体１０は、金属等の導電部材で形成されてもよい。 The main body 11 and the outer lid 12 of the exterior body 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 member such as a composite material thereof, or a metal coated with an insulating coating. The exterior body 10 thereby avoids contact of the power storage element 21 and the like with external metal members and the like. Note that the exterior body 10 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.
　外蓋１２が樹脂から形成されている場合には、各外部端子８１は、インサート成形によって外蓋１２をなす樹脂と一体化されている。つまり、各外部端子８１の一部は、外蓋１２をなす樹脂が直接的に密着しており、当該樹脂により覆われた状態で一体化されている。具体的には、外蓋１２において、各外部端子８１に密着した部分が、各外部端子８１を固定する固定部１２１である。各外部端子８１において、外蓋１２からＺ軸プラス方向に突出し露出した部位には、外部の機器が電気的に接続される。また、各外部端子８１において、外蓋１２からＺ軸マイナス方向で露出した部位には、バスバー３３が接合される。なお、本実施の形態では、インサート成形によって固定部１２１が形成されている場合を例示したが、外蓋１２に外部端子８１を固定できるのであれば、固定部１２１の固定態様は如何様でもよい。嵌合による固定であってもよいし、ネジまたはカシメなどの締結手法を用いた固定であってもよいし、溶接による固定であってもよいし、接着剤による固定であってもよい。 When the outer lid 12 is made of resin, each external terminal 81 is integrated with the resin forming the outer lid 12 by insert molding. That is, a part of each external terminal 81 is in direct contact with the resin forming the outer lid 12, and is integrated while being covered with the resin. Specifically, the portion of the outer lid 12 that is in close contact with each external terminal 81 is the fixing portion 121 that fixes each external terminal 81 . An external device is electrically connected to an exposed portion of each external terminal 81 protruding from the outer cover 12 in the Z-axis positive direction. A bus bar 33 is joined to a portion of each external terminal 81 exposed from the outer cover 12 in the negative Z-axis direction. In the present embodiment, the fixing portion 121 is formed by insert molding. . It may be fixed by fitting, fixed by a fastening method such as screws or caulking, fixed by welding, or fixed by an adhesive.
　［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 section 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。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 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が有する一対の電極端子２２０のうち、一方は、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し、当該電極端子２２０自体が外部端子となってもよい。 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. Furthermore, one of the pair of electrode terminals 220 of the storage element 21 at the end may be extended to an external terminal provided in the storage device 1 and connected (joined) to the external terminal, or may be connected (joined) to the external terminal. It may be electrically connected to the external terminal by a conductive member, or the electrode terminal 220 itself may serve as the external terminal.
　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。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 (stacked) electrode formed by stacking a plurality of flat plate-shaped electrode plates. The electrode body may have any form, such as a body or a bellows-shaped electrode body in which an electrode plate is folded into a bellows shape.
　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。 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.
　第一部材２３及び第二部材２４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、または、それらの複合材料等の絶縁部材により形成されている。これにより、第一部材２３及び第二部材２４は、複数の蓄電素子２１が外部の金属部材等の導電部材と導通することを抑制するが、そのような必要がない場合等には、第一部材２３及び第二部材２４は、金属等の導電部材で形成されてもよい。 The first member 23 and the second member 24 are polycarbonate (PC), polypropylene (PP), polyethylene (PE), polyphenylene sulfide resin (PPS), polyphenylene ether (PPE (including modified PPE)), polyethylene terephthalate (PET ), polybutylene terephthalate (PBT), polyetheretherketone (PEEK), tetrafluoroethylene-perfluoroalkyl vinyl ether (PFA), polytetrafluoroethylene (PTFE), polyethersulfone (PES), ABS resin, or It is formed of an insulating member such as a composite material thereof. As a result, the first member 23 and the second member 24 prevent the plurality of storage elements 21 from being electrically connected to an external conductive member such as a metal member. The member 23 and the second member 24 may be made of a conductive member such as metal.
　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、バスバー及びバスバー取付部］
　以下、Ｘ軸マイナス方向に配置された外部端子８１、バスバー３３ｃ及びバスバー取付部２８ｃについて図４～図６を参照して詳細に説明する。図４は、実施の形態に係る外部端子８１、バスバー３３ｃ及びバスバー取付部２８ｃの組み立て後の状態を示す斜視図である。図５は、実施の形態に係るバスバー取付部２８ｃを示す斜視図である。図６は、実施の形態に係る外部端子８１、バスバー３３ｃ及びバスバー取付部２８ｃの組み立て後の状態を示す部分断面図である。図４及び図５では、外蓋１２において、外部端子８１を固定する固定部１２１の図示が省略されている。 [External terminals, busbars and busbar mounting parts]
The external terminals 81, the busbar 33c, and the busbar mounting portion 28c arranged in the negative direction of the X-axis will be described in detail below with reference to FIGS. 4 to 6. FIG. FIG. 4 is a perspective view showing the assembled state of the external terminal 81, the busbar 33c, and the busbar mounting portion 28c according to the embodiment. FIG. 5 is a perspective view showing the busbar mounting portion 28c according to the embodiment. FIG. 6 is a partial cross-sectional view showing the assembled state of the external terminal 81, the busbar 33c, and the busbar mounting portion 28c according to the embodiment. In FIGS. 4 and 5, illustration of the fixing portion 121 for fixing the external terminal 81 in the outer lid 12 is omitted.
　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、埋設部８１１と、露出部８１２とを有している。埋設部８１１は、ＸＺ面に平行な姿勢で固定部１２１（図２参照）に埋設された平板状の部位である。露出部８１２は、固定部１２１から露出するように、埋設部８１１の上端部から折り曲げられ、ＸＹ面に平行な矩形平板状の部位である。露出部８１２には、Ｚ軸方向を軸方向とする貫通孔８１３が形成されている。 As shown in FIGS. 4 to 6, the external terminal 81 is made of sheet metal and has an embedded portion 811 and an exposed portion 812 . The embedded portion 811 is a plate-like portion embedded in the fixed portion 121 (see FIG. 2) in a posture parallel to the XZ plane. The exposed portion 812 is a rectangular plate-shaped portion that is bent from the upper end portion of the embedded portion 811 so as to be exposed from the fixed portion 121 and parallel to the XY plane. A through hole 813 is formed in the exposed portion 812 with the Z-axis direction as the axial direction.
　バスバー３３ｃは、板金から形成されており、第一締結部３３１と、第二締結部３３２とを有している。第一締結部３３１は、ＸＺ面に平行な矩形平板状の第一板部３３３と、第一板部３３３からＹ軸マイナス方向に突出した第一ボルト部３３４とを有している。第一ボルト部３３４には、制御基板３５から延びるケーブル９０（図２参照）の端子９１が係合しナット３３５が締結されることで、第一ボルト部３３４にケーブル９０の端子９１が接合（接続）される。 The bus bar 33c is made of sheet metal and has a first fastening portion 331 and a second fastening portion 332. The first fastening portion 331 has a rectangular plate-shaped first plate portion 333 parallel to the XZ plane, and a first bolt portion 334 protruding from the first plate portion 333 in the Y-axis negative direction. The terminal 91 of the cable 90 (see FIG. 2) extending from the control board 35 is engaged with the first bolt portion 334 and the nut 335 is tightened, so that the terminal 91 of the cable 90 is joined to the first bolt portion 334 ( connection).
　第二締結部３３２は、第一板部３３３の上端部から折り曲げられたＸＹ面に平行な矩形平板状の第二板部３３６と、第二板部３３６からＺ軸プラス方向に突出した第二ボルト部３３７とを有している。第二ボルト部３３７は、外部端子８１の貫通孔８１３を貫通した状態でナット３３８が締結されることで、第二ボルト部３３７に外部端子８１の露出部８１２が接合（接続）される。 The second fastening portion 332 includes a rectangular flat plate portion 336 that is parallel to the XY plane and is bent from the upper end portion of the first plate portion 333, and a second plate portion 336 that protrudes from the second plate portion 336 in the Z-axis plus direction. and a bolt portion 337 . The exposed portion 812 of the external terminal 81 is joined (connected) to the second bolt portion 337 by fastening the nut 338 while the second bolt portion 337 passes through the through hole 813 of the external terminal 81 .
　バスバー取付部２８ｃは、バスバー３３ｃが外部端子８１に締結される前の状態では、バスバー３３ｃを外部端子８１に対してスライド自在に保持する構造を有している。つまり、バスバー取付部２８ｃは、バスバー３３ｃを保持する保持部の一例である。具体的には、バスバー取付部２８ｃは、台座部２８１と、一対のリブ２８２とを有している。 The busbar mounting portion 28c has a structure that holds the busbar 33c slidably with respect to the external terminal 81 before the busbar 33c is fastened to the external terminal 81 . That is, the busbar mounting portion 28c is an example of a holding portion that holds the busbar 33c. Specifically, the busbar attachment portion 28c has a pedestal portion 281 and a pair of ribs 282 .
　台座部２８１は、バスバー３３ｃの第一締結部３３１を支持する部位であり、壁体２８５と、一対の上部当接部２８３と、一対の下部当接部２８４とを備えている。壁体２８５は、平面視（Ｙ軸方向視）において、上方が開放した略Ｕ字状に形成された壁であり、取付面２５から立設している。壁体２８５において、Ｘ軸方向両側の部分の間隔Ｘ１は、第一締結部３３１の第一板部３３３のＸ軸方向の幅Ｘ２よりも大きい（図６参照）。 The pedestal portion 281 is a portion that supports the first fastening portion 331 of the busbar 33c, and includes a wall body 285, a pair of upper contact portions 283, and a pair of lower contact portions 284. The wall body 285 is a wall formed in a substantially U shape with an open top in a plan view (viewed in the Y-axis direction), and stands upright from the mounting surface 25 . In the wall body 285, the interval X1 between the portions on both sides in the X-axis direction is larger than the width X2 in the X-axis direction of the first plate portion 333 of the first fastening portion 331 (see FIG. 6).
　一対の上部当接部２８３は、壁体２８５の一対の上端部から内方に向けて突出した部位であり、第一締結部３３１の第一板部３３３におけるＹ軸マイナス方向の主面に当接し、当該第一板部３３３のＹ軸マイナス方向への移動を規制する。 The pair of upper contact portions 283 are portions that protrude inward from the pair of upper end portions of the wall body 285 and contact the main surface of the first plate portion 333 of the first fastening portion 331 in the negative Y-axis direction. contact, and restricts the movement of the first plate portion 333 in the Y-axis minus direction.
　一対の下部当接部２８４は、壁体２８５の下端部にある一対の角部から内方に向けて突出した部位であり、第一締結部３３１の第一板部３３３におけるＹ軸マイナス方向の主面に当接し、当該第一板部３３３のＹ軸マイナス方向への移動を規制する。 The pair of lower contact portions 284 are portions that protrude inward from a pair of corner portions at the lower end of the wall body 285, and are located on the first plate portion 333 of the first fastening portion 331 in the negative Y-axis direction. It abuts on the main surface and restricts the movement of the first plate portion 333 in the Y-axis minus direction.
　一対のリブ２８２は、取付面２５からＹ軸マイナス方向に立設し、Ｚ軸方向に延設されたリブである。一対のリブ２８２は、Ｘ軸方向に所定の間隔をあけて配置されている。各リブ２８２の上端部は、上方に進むにつれて徐々に高さ（Ｙ軸方向の長さ）が低くなる傾斜面２８２ａとなっている。また、各リブ２８２において傾斜面２８２ａよりもＺ軸マイナス方向の部分は、高さが一定な平坦面２８２ｂとなっている。平坦面２８２ｂと、各下部当接部２８４との間隔は、第一締結部３３１の第一板部３３３が嵌合する長さになっている。一方、各上部当接部２８３と傾斜面２８２ａとの間隔は、上方に進むにつれて徐々に大きくなる。このため、第一板部３３３が上方から台座部２８１内に挿入されると、まず、第一板部３３３の下端部が各上部当接部２８３と傾斜面２８２ａとの間隔内にスムーズに入り込む。その後、第一板部３３３の下端部は、傾斜面２８２ａにより徐々に各上部当接部２８３に押し付けられながら平坦面２８２ｂに到達し、平坦面２８２ｂ上を摺動する。次いで、第一板部３３３の下端部は、各下部当接部２８４に至ると、当該各下部当接部２８４と平坦面２８２ｂとによって挟まれた状態で嵌合する。この嵌合時においては、第一板部３３３は、各上部当接部２８３及び各下部当接部２８４と、平坦面２８２ｂとにより挟まれてＹ軸方向の移動が規制されているが、第一板部３３３のＺ軸方向の移動は規制されていない。このように、バスバー取付部２８ｃは、バスバー３３ｃをＺ軸方向にスライド自在に保持している。より具体的には、バスバー取付部２８ｃは、締結部材であるナット３３８によってバスバー３３ｃが外部端子８１に締結される際の当該バスバー３３ｃのナット３３８に近づく方向（Ｚ軸プラス方向）へのスライドを許容している。 The pair of ribs 282 are ribs erected from the mounting surface 25 in the negative Y-axis direction and extending in the Z-axis direction. A pair of ribs 282 are arranged at a predetermined interval in the X-axis direction. The upper end of each rib 282 forms an inclined surface 282a whose height (the length in the Y-axis direction) gradually decreases as it progresses upward. In each rib 282, a flat surface 282b having a constant height is formed in the portion of each rib 282 in the negative direction of the Z-axis from the inclined surface 282a. The distance between the flat surface 282b and each lower contact portion 284 is such that the first plate portion 333 of the first fastening portion 331 is fitted. On the other hand, the distance between each upper contact portion 283 and the inclined surface 282a gradually increases upward. Therefore, when the first plate portion 333 is inserted into the pedestal portion 281 from above, first, the lower end portion of the first plate portion 333 smoothly enters the space between each upper contact portion 283 and the inclined surface 282a. . After that, the lower end of the first plate portion 333 reaches the flat surface 282b while being gradually pressed against the upper contact portions 283 by the inclined surface 282a, and slides on the flat surface 282b. Next, when the lower end portion of the first plate portion 333 reaches each lower contact portion 284, the lower contact portion 284 and the flat surface 282b engage with each other while being sandwiched therebetween. At the time of this fitting, the first plate portion 333 is sandwiched between the upper contact portions 283 and the lower contact portions 284 and the flat surface 282b to restrict movement in the Y-axis direction. Movement of the one plate portion 333 in the Z-axis direction is not restricted. Thus, the busbar mounting portion 28c holds the busbar 33c slidably in the Z-axis direction. More specifically, the busbar mounting portion 28c allows the busbar 33c to slide in the direction (Z-axis plus direction) approaching the nut 338 when the busbar 33c is fastened to the external terminal 81 by the nut 338, which is a fastening member. Allowed.
　上述したように台座部２８１の壁体２８５において、Ｘ軸方向両側の部分の間隔Ｘ１が、第一板部３３３の幅Ｘ２よりも大きい。このため、バスバー３３ｃは、間隔Ｘ１と幅Ｘ２との差分だけＸ軸方向にもスライド自在に保持されているとも言える。また、この差分によってＹ軸方向を回転中心としたバスバー３３ｃの回転（回転方向Ｃ１）も許容されている。回転方向Ｃ１の回転中心は、バスバー３３ｃのスライド方向（Ｚ軸方向またはＸ軸方向）に交差する方向とも言える。 As described above, in the wall 285 of the pedestal portion 281 , the interval X1 between the portions on both sides in the X-axis direction is larger than the width X2 of the first plate portion 333 . Therefore, it can be said that the bus bar 33c is held slidably in the X-axis direction by the difference between the interval X1 and the width X2. This difference also allows the bus bar 33c to rotate (rotating direction C1) about the Y-axis direction. The rotation center of the rotation direction C1 can also be said to be a direction that intersects the sliding direction (the Z-axis direction or the X-axis direction) of the busbar 33c.
　［外部端子、バスバーと外部端子との締結動作］
　バスバー３３ｃと外部端子８１との締結動作について説明する。 [Fastening operation between external terminal, bus bar and external terminal]
A fastening operation between the bus bar 33c and the external terminal 81 will be described.
　上述したように、締結前においては、バスバー３３ｃはバスバー取付部２８ｃにより保持されている。この状態では、バスバー３３ｃの第二板部３３６と、外部端子８１の露出部８１２とが重ね合わされており、バスバー３３ｃの第二ボルト部３３７が、露出部８１２の貫通孔８１３を貫通している。このとき、バスバー３３ｃの第一ボルト部３３４には、ケーブル９０の端子９１が締結されているが、ケーブル９０の変形を起因とした負荷を受けることによりバスバー３３ｃがＺ軸方向に移動したり、Ｘ軸方向に移動したり、回転方向Ｃ１に回転する場合がある。この場合、バスバー取付部２８ｃではこれらの移動が許容されているので、ケーブル９０が組み付けられたバスバー３３ｃであっても、スムーズに保持できる。 As described above, the busbar 33c is held by the busbar mounting portion 28c before fastening. In this state, the second plate portion 336 of the busbar 33c and the exposed portion 812 of the external terminal 81 are overlapped, and the second bolt portion 337 of the busbar 33c passes through the through hole 813 of the exposed portion 812. . At this time, the terminal 91 of the cable 90 is fastened to the first bolt portion 334 of the busbar 33c. It may move in the X-axis direction or rotate in the rotation direction C1. In this case, since the busbar mounting portion 28c allows these to move, even the busbar 33c to which the cable 90 is attached can be held smoothly.
　その後、第二ボルト部３３７にナット３３８を締結する際には、その締結力によりバスバー３３ｃが締結方向（Ｚ軸プラス方向）に引き寄せられる。バスバー取付部２８ｃではＺ軸方向の移動が許容されているので、バスバー３３ｃはＺ軸プラス方向にスライドして外部端子８１の露出部８１２に当接し、締結される。このように締結時にはバスバー３３ｃがスライドするために、バスバー３３ｃに対する応力集中が緩和される。 After that, when the nut 338 is fastened to the second bolt portion 337, the fastening force pulls the bus bar 33c in the fastening direction (Z-axis plus direction). Since the busbar mounting portion 28c is allowed to move in the Z-axis direction, the busbar 33c slides in the positive Z-axis direction and comes into contact with the exposed portion 812 of the external terminal 81 to be fastened. Since the busbar 33c slides during fastening in this manner, stress concentration on the busbar 33c is alleviated.
　締結前の状態では、バスバー３３ｃがケーブル９０の変形を受けて正規の姿勢からずれていたとしても、Ｚ軸方向及びＸ軸方向の移動と、回転とが許容されたままである。このため、バスバー３３ｃは、締結により回転しながら姿勢を整えつつ、Ｚ軸方向及びＸ軸方向にスライドするので、最終的に正規な姿勢となる（図６参照）。 In the state before fastening, even if the busbar 33c is deformed by the cable 90 and deviates from the normal posture, movement in the Z-axis direction and the X-axis direction and rotation are still allowed. Therefore, the busbar 33c slides in the Z-axis direction and the X-axis direction while adjusting its attitude while rotating by fastening, so that it finally assumes a normal attitude (see FIG. 6).
　［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が固定部１２１で固定され、締結前の状態のバスバー３３ｃがバスバー取付部２８ｃにより外部端子８１に対してスライド自在に保持されている。このため、外部端子８１とバスバー３３ｃとが締結される際には、その締結力によってバスバー３３ｃがスライドする。これにより、バスバー３３ｃに対する応力集中を緩和でき、バスバー３３ｃの損傷を抑制できる。したがって、蓄電装置１の信頼性の低下を抑制できる。 [Effects, etc.]
As described above, according to the present embodiment, the external terminal 81 is fixed by the fixing portion 121, and the busbar 33c in a state before fastening is slidably held with respect to the external terminal 81 by the busbar mounting portion 28c. . Therefore, when the external terminal 81 and the busbar 33c are fastened together, the fastening force causes the busbar 33c to slide. As a result, stress concentration on the busbar 33c can be alleviated, and damage to the busbar 33c can be suppressed. Therefore, deterioration in reliability of the power storage device 1 can be suppressed.
　バスバー取付部２８ｃには、バスバー３３ｃが嵌合されるので、締結前の状態でバスバー３３ｃの移動をある程度規制できる。したがって、締結作業の安定性を高めることができる。締結作業の安定性が高められれば、蓄電装置１の信頼性の低下をより抑制できる。 Since the busbar 33c is fitted to the busbar mounting portion 28c, the movement of the busbar 33c can be restricted to some extent before fastening. Therefore, it is possible to enhance the stability of the fastening work. If the fastening work can be made more stable, the deterioration of the reliability of the power storage device 1 can be further suppressed.
　バスバー取付部２８ｃがバスバー３３ｃの回転を許容しているので、締結時においてはバスバー３３ｃがスライドに加えて回転も可能となる。このため、締結時におけるバスバー３３ｃの移動方向の自由度を高めることができる。これにより、バスバー３３ｃに対する応力集中をより緩和でき、バスバー３３ｃの損傷をより確実に抑制できる。したがって、蓄電装置１の信頼性の低下をより抑制できる。 Since the busbar mounting portion 28c allows the rotation of the busbar 33c, the busbar 33c can rotate as well as slide when tightened. Therefore, it is possible to increase the degree of freedom in the movement direction of the bus bar 33c during fastening. As a result, stress concentration on busbar 33c can be further alleviated, and damage to busbar 33c can be more reliably suppressed. Therefore, deterioration in reliability of the power storage device 1 can be further suppressed.
　バスバー取付部２８ｃにおけるバスバー３３ｃのスライド方向と、締結時における締結方向（Ｚ軸方向）とが相互に沿う方向であるので、締結時にバスバー３３ｃをスムーズにスライドできる。これにより、バスバー３３ｃに対する応力集中をより緩和でき、バスバー３３ｃの損傷をより確実に抑制できる。したがって、蓄電装置１の信頼性の低下をより抑制できる。 Since the sliding direction of the busbar 33c in the busbar mounting portion 28c and the fastening direction (Z-axis direction) at the time of fastening are directions along each other, the busbar 33c can slide smoothly at the time of fastening. As a result, stress concentration on busbar 33c can be further alleviated, and damage to busbar 33c can be more reliably suppressed. Therefore, deterioration in reliability of the power storage device 1 can be further suppressed.
　バスバー取付部２８ｃは、バスバー３３ｃが外部端子８１に締結される際の当該バスバー３３ｃのナット３３８に近づく方向へのスライドを許容しているので、締結によってバスバー３３ｃがナット３３８に近づくように移動する。つまり、締結により積極的にバスバー３３ｃを移動できるので、バスバー３３ｃに対する応力集中をより緩和できる。したがって、蓄電装置１の信頼性の低下をより抑制できる。 The busbar mounting portion 28c allows the busbar 33c to slide in a direction approaching the nut 338 when the busbar 33c is fastened to the external terminal 81, so that the fastening causes the busbar 33c to move closer to the nut 338. . That is, since the busbar 33c can be positively moved by fastening, the stress concentration on the busbar 33c can be further alleviated. Therefore, deterioration in reliability of the power storage device 1 can be further suppressed.
　ケーブル９０が組み付けられたバスバー３３ｃがバスバー取付部２８ｃによりスライド自在に保持されるので、ケーブル９０の変形を受けて移動しやすいバスバー３３ｃのスライドを許容しながら保持できる。したがって、ケーブル９０が組み付けられた状態であっても、バスバー３３ｃをスムーズに保持できる。 Since the busbar 33c to which the cable 90 is assembled is slidably held by the busbar mounting portion 28c, the busbar 33c, which is easily moved due to deformation of the cable 90, can be held while allowing sliding. Therefore, even with the cable 90 attached, the bus bar 33c can be held smoothly.
　［変形例１］
　上記実施の形態では、外部端子８１（端子）が固定部１２１に固定されていて、バスバー３３ｃ（導電部材）が保持部（バスバー取付部２８ｃ）にスライド自在に保持されている場合を例示した。しかしながら、導電部材が固定されていて、端子がスライド自在に保持されてもよい。 [Modification 1]
In the above embodiment, the external terminal 81 (terminal) is fixed to the fixing portion 121, and the busbar 33c (conductive member) is slidably held by the holding portion (busbar mounting portion 28c). However, the conductive member may be fixed and the terminals may be slidably held.
　図７は、変形例に係る外部端子８１ｄ、バスバー３３ｄ及び保持部６０ｄの組み立て後の状態を示す部分断面図である。 FIG. 7 is a partial cross-sectional view showing the assembled state of the external terminal 81d, the bus bar 33d, and the holding portion 60d according to the modification.
　外部端子８１ｄは、板金から形成されており、ＸＹ面に平行な第一平板部８１５ｄと、第一平板部８１５ｄのＹ軸プラス方向の端部から上方に向けて折り曲げられＸＺ面に平行な第二平板部８１６ｄとを有している。第一平板部８１５ｄには、Ｚ軸方向を軸方向とする貫通孔８１７ｄが形成されている。 The external terminal 81d is formed of sheet metal, and includes a first flat plate portion 815d parallel to the XY plane and a first flat plate portion 815d that is bent upward from the end of the first flat plate portion 815d in the positive direction of the Y axis and parallel to the XZ plane. It has two flat plate portions 816d. The first flat plate portion 815d is formed with a through hole 817d whose axial direction is the Z-axis direction.
　バスバー３３ｄは、平板部３７ｄと、平板部３７ｄの一部からＺ軸プラス方向に突出したボルト部３８ｄを有している。平板部３７ｄは、外装体または収容部をなす樹脂とインサート成形によって一体化されている。つまり、バスバー３３ｄの一部は、外装体または収容部をなす樹脂が直接的に密着しており、当該樹脂により覆われた状態で一体化されている。具体的には、外装体または収容部において、バスバー３３ｄに密着した部分が、バスバー３３ｄを固定する固定部３９ｄである。 The bus bar 33d has a flat plate portion 37d and a bolt portion 38d projecting in the positive Z-axis direction from a portion of the flat plate portion 37d. The flat plate portion 37d is integrated with the resin forming the exterior body or housing portion by insert molding. In other words, a portion of the bus bar 33d is in direct contact with the resin that forms the exterior body or housing portion, and is integrated while being covered with the resin. Specifically, the fixing portion 39d that fixes the busbar 33d is a portion of the exterior body or housing that is in close contact with the busbar 33d.
　保持部６０ｄは、外部端子８１ｄがバスバー３３ｄに締結される前の状態では、外部端子８１ｄをバスバー３３ｄに対してスライド自在に保持する構造を有している。具体的には、保持部６０ｄは、外装体または収容部の取付面２５ｄから立設した一対の挟持部６１ｄを有している。一対の挟持部６１ｄは、バスバー３３ｄをＸ軸方向で挟むように配置されている。各挟持部６１ｄは、Ｚ軸方向に延設されており、その上端部には内方に向けて突出した当接部２８３ｄが設けられている。各当接部２８３ｄは、外部端子８１ｄの第二平板部８１６ｄに当接する。第二平板部８１６ｄは、各当接部２８３ｄと取付面２５ｄとによって挟持された状態で嵌合する。この嵌合時においては、第二平板部８１６ｄは、各当接部２８３ｄと取付面２５ｄとにより挟まれているだけであり、外部端子８１ｄのＺ軸方向の移動は規制されていない。 The holding portion 60d has a structure that holds the external terminal 81d slidably with respect to the busbar 33d before the external terminal 81d is fastened to the busbar 33d. Specifically, the holding portion 60d has a pair of clamping portions 61d erected from the mounting surface 25d of the exterior body or housing portion. The pair of sandwiching portions 61d are arranged so as to sandwich the bus bar 33d in the X-axis direction. Each holding portion 61d extends in the Z-axis direction, and an inwardly projecting contact portion 283d is provided at the upper end portion thereof. Each contact portion 283d contacts the second flat plate portion 816d of the external terminal 81d. The second flat plate portion 816d is fitted while being sandwiched between the contact portions 283d and the mounting surface 25d. During this fitting, the second flat plate portion 816d is only sandwiched between the contact portions 283d and the mounting surface 25d, and the movement of the external terminal 81d in the Z-axis direction is not restricted.
　バスバー３３ｄと外部端子８１ｄの締結動作について説明する。締結前においては、外部端子８１ｄは保持部６０ｄにより保持されている。この状態では、外部端子８１ｄの貫通孔８１７ｄには、バスバー３３ｄのボルト部３８ｄが貫通している。このとき、外部端子８１ｄの第一平板部８１５ｄは、バスバー３３ｄの平板部３７ｄから離れた状態で、保持部６０ｄに保持されている。 A fastening operation between the bus bar 33d and the external terminal 81d will be described. Before fastening, the external terminal 81d is held by the holding portion 60d. In this state, the through hole 817d of the external terminal 81d is penetrated by the bolt portion 38d of the bus bar 33d. At this time, the first flat plate portion 815d of the external terminal 81d is held by the holding portion 60d in a state separated from the flat plate portion 37d of the busbar 33d.
　その後、ボルト部３８ｄにナット３３８ｄを締結する際には、外部端子８１ｄは、保持部６０ｄによりＺ軸方向の移動が許容されているのでＺ軸マイナス方向にスライドする。このため、外部端子８１ｄの第一平板部８１５ｄは、バスバー３３ｄの平板部３７ｄに重なり合い締結される。このように締結時には外部端子８１ｄがスライドするために、外部端子８１ｄに対する応力集中が緩和される。 After that, when the nut 338d is fastened to the bolt portion 38d, the external terminal 81d is allowed to move in the Z-axis direction by the holding portion 60d, so it slides in the negative Z-axis direction. Therefore, the first flat plate portion 815d of the external terminal 81d is overlapped and fastened to the flat plate portion 37d of the bus bar 33d. Since the external terminal 81d slides during fastening in this manner, stress concentration on the external terminal 81d is alleviated.
　［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、保持部であるバスバー取付部２８ｃがバスバー３３ｃのＺ軸方向及びＸ軸方向のスライドと回転とを許容している場合を例示したが、保持部は、バスバーの一方向のスライドのみを許容してもよい。この場合においては、保持部は、バスバーの締結方向に沿う方向のスライドを許容していることが好ましい。 In the embodiment, the busbar mounting portion 28c, which is the holding portion, allows the busbar 33c to slide and rotate in the Z-axis direction and the X-axis direction. may only be allowed. In this case, it is preferable that the holding portion allows sliding in the fastening direction of the busbar.
　実施の形態では、保持部としてバスバー取付部２８ｃを例示したが、導電部材が端子に締結される前の状態で導電部材を端子に対してスライド自在に保持できるのであれば、保持部の構造は如何様でもよい。同様に、変形例１では、保持部として保持部６０ｄを例示したが、導電部材が端子に締結される前の状態で端子を導電部材に対してスライド自在に保持できるのであれば、保持部の構造は如何様でもよい。 In the embodiment, the busbar mounting portion 28c is exemplified as the holding portion. It doesn't matter how you like it. Similarly, in Modification 1, the holding portion 60d is used as an example of the holding portion. Any structure may be used.
　実施の形態では、バスバー取付部２８ｃのみがバスバー３３ｃをスライド自在に保持する場合を例示したが、他のバスバー取付部もバスバーをスライド自在に保持してもよい。 In the embodiment, only the busbar mounting portion 28c slidably holds the busbar 33c, but other busbar mounting portions may also slidably hold the busbar.
　実施の形態では、本発明に係る導電部材としてバスバー３３ｃを例示したが、導電部材としては、ケーブル、ヒューズなどを含むことができる。実施の形態では、本発明に係る端子として外部端子８１を例示したが、端子としては内部端子などを含むことができる。 In the embodiment, the busbar 33c is exemplified as the conductive member according to the present invention, but the conductive member can include cables, fuses, and the like. In the embodiment, the external terminal 81 is exemplified as a terminal according to the present invention, but the terminal may include an internal terminal or the like.
　実施の形態では、固定部１２１が外装体１０の外蓋１２に設けられている場合を例示したが、固定部は外装体の本体部に設けられてもよいし、外装体以外の、蓄電装置を構成する部材に設けられてもよい。同様に、実施の形態では、保持部であるバスバー取付部２８ｃが収容部２２に設けられている場合を例示したが、保持部は収容部２２以外の、蓄電装置を構成する部材に設けられてもよい。実施の形態では、固定部と保持部とが別部材に設けられている場合を例示したが、一つの部材に固定部と保持部とが設けられてもよい。 In the embodiment, the fixing portion 121 is provided on the outer lid 12 of the exterior body 10 as an example, but the fixing portion may be provided on the main body portion of the exterior body. may be provided in a member that constitutes the Similarly, in the embodiment, the busbar mounting portion 28c as the holding portion is provided in the housing portion 22, but the holding portion is provided in a member other than the housing portion 22, which constitutes the power storage device. good too. In the embodiment, the case where the fixing portion and the holding portion are provided in separate members has been exemplified, but the fixing portion and the holding portion may be provided in one member.
　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　本体部
１２　外蓋
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、２５ｄ　取付面
２６、２６ａ、２６ｂ、２６ｃ　ボス部
２７　ヒューズ取付部
２８、２８ａ、２８ｂ　バスバー取付部
２８ｃ　バスバー取付部（保持部）
３３、３３ｂ、３３ｃ、３３ｄ　バスバー（導電部材）
３４　ヒューズ
３５　制御基板
３７ｄ　平板部
３８ｄ　ボルト部
３９ｄ、１２１　固定部
６０ｄ　保持部
６１ｄ　挟持部
８１、８１ｄ　外部端子（端子）
９０　ケーブル
９１　端子
１１１　開口部
１１２　第一壁部
１１３　第二壁部
１１４　第三壁部
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
２８１　台座部
２８２　リブ
２８２ａ　傾斜面
２８２ｂ　平坦面
２８３　上部当接部
２８３ｄ　当接部
２８４　下部当接部
２８５　壁体
３３１　第一締結部
３３２　第二締結部
３３３　第一板部
３３４　第一ボルト部
３３５、３３８、３３８ｄ　ナット
３３６　第二板部
３３７　第二ボルト部
８１１　埋設部
８１２　露出部
８１３、８１７ｄ　貫通孔
８１５ｄ　第一平板部
８１６ｄ　第二平板部 1 Power storage device 10 Exterior body 11 Main body 12 Outer lid 20 Power storage unit 21 Power storage element 22 Storage part 23 First member 24 Second members 25, 25d Mounting surfaces 26, 26a, 26b, 26c Boss part 27 Fuse mounting parts 28, 28a , 28b Busbar mounting portion 28c Busbar mounting portion (holding portion)
33, 33b, 33c, 33d Bus bar (conductive member)
34 fuse 35 control board 37d flat plate portion 38d bolt portion 39d, 121 fixed portion 60d holding portion 61d holding portion 81, 81d external terminal (terminal)
90 cable 91 terminal 111 opening 112 first wall 113 second wall 114 third wall 210 container 220 electrode terminals 231, 241 first side walls 232, 242 second side walls 233, 243 bottom wall 234 notch 281 Base portion 282 Rib 282a Inclined surface 282b Flat surface 283 Upper contact portion 283d Contact portion 284 Lower contact portion 285 Wall body 331 First fastening portion 332 Second fastening portion 333 First plate portion 334 First bolt portions 335, 338 , 338d nut 336 second plate portion 337 second bolt portion 811 embedded portion 812 exposed portion 813, 817d through hole 815d first flat plate portion 816d second flat plate portion

Claims (6)

  1. 　蓄電素子を有する蓄電装置であって、
    　端子と、
    　前記蓄電素子に電気的に接続されるとともに前記端子に締結される導電部材と、
    　前記端子及び前記導電部材の一方を前記蓄電装置の所定位置に固定する固定部と、
    　前記端子及び前記導電部材の他方を保持する保持部とを備え、
    　前記保持部は、前記導電部材が前記端子に締結される前の状態では、前記他方を前記一方に対してスライド自在な構造を有する
    　蓄電装置。     A power storage device having a power storage element,
    a terminal;
    a conductive member electrically connected to the storage element and fastened to the terminal;
    a fixing portion that fixes one of the terminal and the conductive member to a predetermined position of the power storage device;
    a holding portion that holds the other of the terminal and the conductive member;
    The holding portion has a structure in which the other side is slidable relative to the one side before the conductive member is fastened to the terminal.
  2. 　前記保持部は、前記他方が嵌合される構造を有する
    　請求項１に記載の蓄電装置。     The power storage device according to claim 1, wherein the holding portion has a structure in which the other is fitted.
  3. 　前記保持部は、前記導電部材が前記端子に締結される前の状態では、前記他方のスライド方向に対して交差する方向を中心とした前記他方の回転を許容する構造を有する
    　請求項１または２に記載の蓄電装置。     3. The holding part has a structure that allows the other to rotate about a direction intersecting the sliding direction of the other in a state before the conductive member is fastened to the terminal. The power storage device according to .
  4. 　前記保持部における前記他方のスライド方向は、締結時における締結方向に沿う方向である
    　請求項１～３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 3, wherein the other sliding direction of the holding portion is a direction along a fastening direction when fastening.
  5. 　前記導電部材を締結するための締結部材を備え、
    　前記保持部は、前記導電部材をスライド自在であり、前記締結部材によって前記導電部材が前記端子に締結される際の当該導電部材の前記締結部材に近づく方向へのスライドを許容している
    　請求項４に記載の蓄電装置。     A fastening member for fastening the conductive member,
    The holding portion is slidable on the conductive member, and allows the conductive member to slide in a direction approaching the fastening member when the conductive member is fastened to the terminal by the fastening member. 5. The power storage device according to 4.
  6. 　前記保持部は、前記導電部材をスライド自在であり、
    　前記導電部材には、前記蓄電素子と電気的に接続されたケーブルが組み付けられている
    　請求項１～５のいずれか一項に記載の蓄電装置。     The holding portion is slidable on the conductive member,
    The power storage device according to any one of claims 1 to 5, wherein a cable electrically connected to the power storage element is attached to the conductive member.
PCT/JP2022/012243 2021-04-27 2022-03-17 Power storage device WO2022230428A1 (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002304981A (en) * 2001-04-05 2002-10-18 Yazaki Corp Battery terminal
JP2008192595A (en) * 2007-01-12 2008-08-21 Toyota Motor Corp Battery device
JP2016143584A (en) * 2015-02-03 2016-08-08 パナソニックＩｐマネジメント株式会社 Bus bar module and battery monitoring module

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002304981A (en) * 2001-04-05 2002-10-18 Yazaki Corp Battery terminal
JP2008192595A (en) * 2007-01-12 2008-08-21 Toyota Motor Corp Battery device
JP2016143584A (en) * 2015-02-03 2016-08-08 パナソニックＩｐマネジメント株式会社 Bus bar module and battery monitoring module

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