WO2023145585A1 - 蓄電装置 - Google Patents

蓄電装置 Download PDF

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Publication number
WO2023145585A1
WO2023145585A1 PCT/JP2023/001439 JP2023001439W WO2023145585A1 WO 2023145585 A1 WO2023145585 A1 WO 2023145585A1 JP 2023001439 W JP2023001439 W JP 2023001439W WO 2023145585 A1 WO2023145585 A1 WO 2023145585A1
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WO
WIPO (PCT)
Prior art keywords
piece
power storage
axis direction
insulating
storage elements
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/JP2023/001439
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English (en)
French (fr)
Japanese (ja)
Inventor
洋介 西村
稔 渡邉
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GS Yuasa International Ltd
Original Assignee
GS Yuasa International Ltd
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 GS Yuasa International Ltd filed Critical GS Yuasa International Ltd
Priority to US18/833,387 priority Critical patent/US20250149764A1/en
Priority to JP2023576838A priority patent/JPWO2023145585A1/ja
Priority to CN202380018331.5A priority patent/CN118591936A/zh
Publication of WO2023145585A1 publication Critical patent/WO2023145585A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
    • H01M50/588—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries outside the batteries, e.g. incorrect connections of terminals or busbars
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • 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
    • H01G11/10—Multiple hybrid or EDL capacitors, e.g. arrays or modules
    • H01G11/12—Stacked hybrid or EDL capacitors
    • 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
    • H01G11/76—Terminals, e.g. extensions of current collectors specially adapted for integration in multiple or stacked hybrid or EDL capacitors
    • 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
    • H01G11/82—Fixing or assembling a capacitive element in a housing, e.g. mounting electrodes, current collectors or terminals in containers or encapsulations
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G2/00—Details of capacitors not covered by a single one of groups H01G4/00-H01G11/00
    • H01G2/02—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
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/209—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for prismatic or rectangular cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/262—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with fastening means, e.g. locks
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/262—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with fastening means, e.g. locks
    • H01M50/264—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with fastening means, e.g. locks for cells or batteries, e.g. straps, tie rods or peripheral frames
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/289—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/289—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs
    • H01M50/291—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs characterised by their shape
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
    • H01M50/59—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries characterised by the protection means
    • H01M50/593—Spacers; Insulating plates
    • 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
    • H01G11/10—Multiple hybrid or EDL capacitors, e.g. arrays or modules
    • 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 having a plurality of power storage elements.
  • the power supply device 500 includes a battery stack 502 in which a plurality of battery cells 501 are stacked, a pair of end plates 503 arranged at both ends of the battery stack 502 in the stacking direction, and a bind bar 504 fixed to the end plate 503 .
  • the battery cell 501 has a plate-like outer shape with a thickness smaller than its width, and has a rectangular main surface and a plurality of laminated plates. Specifically, the battery cell 501 has a rectangular exterior can that is thinner than the width.
  • the pair of end plates 503 cover both end faces of a battery stack 502 in which battery cells 501 are alternately stacked with separators 505 interposed therebetween.
  • the pair of end plates 503 are fixed by bind bars 504 to sandwich the battery stack 502 .
  • Each end plate 503 is composed of one metal plate.
  • the bind bar 504 has a body plate 506 with both ends fixed to the end plates 503 .
  • the body plate is arranged on both sides of a battery stack 502 having end plates 503 stacked on both ends, and the ends are fixed to the pair of end plates 503 .
  • the body plate 506 is formed in a plate shape extending in the battery stacking direction of the battery stack 502 . More specifically, the main body plate 506 has a flat fastening main surface 507 covering the side surface of the battery stack 502, and a first bent piece 508 and a second bent piece as bent pieces obtained by bending the edges of the fastening main surface 507. 509 , a third bent piece 510 and a fourth bent piece 511 .
  • the first bent piece 508 is an upper end bent piece that is bent at the upper end side.
  • the second bent piece 509 is a bottom bent piece bent at the lower end side, and partially covers the corners of the bottom surface of the battery stack 502 .
  • the third bent piece 510 is an end plate fixing piece whose front side is partially bent, and the fourth bent piece 511 is an end plate fixing piece whose rear side is partially bent.
  • the body plate 506 is manufactured by bending a metal plate, and is fixed to the end plate 503 by screwing with an end plate fixing piece.
  • an insulating structure can be provided between the body plate 506 and the battery stack 502 in order to prevent a short circuit between the metal body plate 506 and the outer can of the battery cell 501.
  • an insulating material 512 is interposed between the metal body plate 506 and the battery stack 502 .
  • the insulating material 512 is composed of a resin sheet or the like.
  • the shape of the insulating material 512 is substantially the same as that of the body plate so that the side surface of the battery stack does not come into contact with the body plate.
  • the insulating material 512 is formed in a sheet shape covering substantially the entire inner surface of the body plate 506 .
  • the second bent piece 509 bottom bent piece
  • the portion of the insulating material 512 corresponding to the second bent piece simply overlap each other. Due to vibration or the like during assembly of the device 500 or use of the power supply device 500 , the corresponding portion of the insulating material 512 may shift (that is, move) with respect to the second bent piece 509 . If the corresponding portion of the insulating material 512 moves with respect to the second bent piece 509 in this way, there is concern that sufficient insulation between the battery stack 502 and the body plate 506 cannot be achieved.
  • an object of the present embodiment is to provide a power storage device in which the second piece of the insulating member is difficult to move with respect to the first piece of the extending member.
  • the power storage device of this embodiment is a plurality of power storage elements; an extending member adjacent to the plurality of power storage elements; an insulating member disposed between the plurality of power storage elements and the extending member;
  • the stretching member is a first body portion extending in a direction perpendicular to the first direction in which the plurality of storage elements are arranged;
  • a first piece portion extending in the first direction from an end portion of the first body portion in a second direction orthogonal to the first direction and extending in a third direction orthogonal to each of the first direction and the second direction and each of the first body portion and the first piece portion is arranged along the plurality of power storage elements
  • the insulating member is a second body portion extending along the first body portion between the plurality of power storage elements and the first body portion; a second piece portion connected to the end portion of the second body portion in the second direction between the plurality of storage elements and the first piece portion and extending along the first piece portion; , The first piece and the second piece are engaged.
  • FIG. 1 is a perspective view of a power storage device according to this embodiment.
  • FIG. 2 is an exploded perspective view of the power storage device.
  • FIG. 3 is a cross-sectional view of the power storage device.
  • 4A is an enlarged view at position IV of FIG. 3.
  • FIG. 4B is an enlarged cross-sectional view of a power storage device according to a comparative example.
  • FIG. 5 is a perspective view of an extension member of the power storage device.
  • FIG. 6 is a side view of the extension member;
  • FIG. 9 is a bottom view of the insulating member.
  • FIG. 10 is a cross-sectional view taken along the line XX in FIG. 9.
  • FIG. 11 is a cross-sectional view taken along line XI-XI in FIG. 9.
  • FIG. 12 is a perspective view of a conventional power supply device.
  • FIG. 13 is an exploded view of the power supply.
  • the power storage device of the present embodiment is a plurality of power storage elements; an extending member adjacent to the plurality of power storage elements; an insulating member disposed between the plurality of power storage elements and the extending member;
  • the stretching member is a first body portion extending in a direction perpendicular to the first direction in which the plurality of storage elements are arranged;
  • a first piece portion extending in the first direction from an end portion of the first body portion in a second direction orthogonal to the first direction and extending in a third direction orthogonal to each of the first direction and the second direction and each of the first body portion and the first piece portion is arranged along the plurality of power storage elements
  • the insulating member is a second body portion extending along the first body portion between the plurality of power storage elements and the first body portion; a second piece portion connected to the end portion of the second body portion in the second direction between the plurality of storage elements and the first piece portion and extending along the first piece portion; , The first piece and the second piece are engaged.
  • the first piece and the second piece may be engaged in an intermediate region excluding respective ends of the first piece in the first direction and the third direction.
  • the first piece has a first surface facing the plurality of power storage elements in the second direction and a second surface that is the back surface of the first surface,
  • the second piece may be arranged between the plurality of power storage elements and the first piece without exceeding the second surface in the direction from the second piece to the first piece. good.
  • the size of the power storage device in the second direction is reduced by the portion exceeding the second surface, rather than the configuration in which a part of the second piece exceeds the second surface of the first piece ( That is, miniaturization in the second direction can be achieved.
  • the first piece includes a piece main body having the first surface and the second surface, and a hook projecting from the piece main body in a direction toward the second piece and engaging with the second piece. You may have a junction and a.
  • the first piece can be pulled in a state where each portion of the second piece does not exceed the second surface of the first piece. It is possible to easily realize a configuration in which the portion and the second piece portion are engaged with each other.
  • each component (each component) of this embodiment is the one in this embodiment, and may differ from the name of each component (each component) in the background art.
  • the power storage device 1 of the present embodiment includes a plurality of power storage elements 10, an extending member 42 adjacent to the power storage elements 10, and a plurality of power storage elements 10 and the extending member 42. and an insulating member 7 disposed therebetween.
  • the power storage device 1 includes a plurality of power storage elements 10 arranged in a predetermined direction, a plurality of adjacent members 2 adjacent to the power storage elements 10 in the predetermined direction, and an extension member 42 . and a holding member 4 that holds a plurality of adjacent members 2 .
  • This power storage device 1 has a first fastening member B that fixes at least one adjacent member 2 to the holding member 4 and at least one insulating member 7 that insulates between the plurality of power storage elements 10 and the holding member 4.
  • a plurality of bus bars 8 electrically connecting the storage elements 10 are provided.
  • Each of the plurality of power storage elements 10 is a primary battery, a secondary battery, a capacitor, or the like.
  • the power storage device 10 of the present embodiment is a chargeable/dischargeable non-aqueous electrolyte secondary battery. More specifically, the power storage device 10 is a lithium ion secondary battery that utilizes electron transfer that occurs with the movement of lithium ions.
  • each electric storage element 10 includes an electrode body, a case 11 that accommodates the electrode body together with an electrolytic solution, an external terminal 14 that is at least partially exposed to the outside of the case 11, and the electrode body and the external terminal 14. and a current collector to be connected.
  • the positive electrode and the negative electrode are alternately laminated with separators interposed therebetween.
  • lithium ions move between the positive electrode and the negative electrode, thereby charging and discharging the storage element 10 .
  • the case 11 has a case body 12 having an opening and a plate-like cover plate 13 that closes (closes) the opening of the case body 12 .
  • the case main body 12 has a square tubular shape (that is, a bottomed square tubular shape) with one end in the opening direction closed, and the case 11 has a rectangular parallelepiped shape (hexahedral shape).
  • the case main body 12 includes a plate-like closing portion 121 and a cylindrical trunk portion (peripheral wall) 122 connected to the peripheral edge of the closing portion 121 .
  • the closing part 121 is located at the lower end of the case body 12 when the case body 12 is arranged with the opening facing upward (that is, it becomes the bottom wall of the case body 12 when the opening faces upward). ) is a plate-like portion.
  • the closing portion 121 has a rectangular plate shape when viewed from the normal direction of the closing portion 121 .
  • the trunk portion 122 has a square tube shape, more specifically, a flat square tube shape.
  • Body portion 122 has a pair of long wall portions 123 extending from the long sides of the peripheral edge of closing portion 121 and a pair of short wall portions 124 extending from the short sides of the peripheral edge of closing portion 121 .
  • Both the long wall portion 123 and the short wall portion 124 are plate-shaped (specifically, rectangular plate-shaped).
  • the short wall portion 124 connects the corresponding ends of the pair of long wall portions 123 to each other, thereby forming the square tubular trunk portion 122 .
  • the lid plate 13 is a plate-like member that closes the opening of the case body 12 .
  • the cover plate 13 of this embodiment has a rectangular shape.
  • the case 11 is formed by joining the cover plate 13 to the case main body 12 with the peripheral edge of the cover plate 13 overlapping the peripheral edge of the opening of the case main body 12 .
  • the case 11 described above has a flat rectangular parallelepiped shape, and the plurality of power storage elements 10 are arranged in the predetermined direction with the wide surfaces (long wall portions 123) of the case 11 facing each other.
  • the external terminal 14 is a part that is electrically connected to an external terminal of another storage element or an external device.
  • the external terminal 14 is formed of a conductive member.
  • the external terminal 14 is made of a highly weldable metal material such as an aluminum-based metal material such as aluminum or an aluminum alloy, or a copper-based metal material such as copper or a copper alloy.
  • the power storage device 10 of the present embodiment has two external terminals 14 arranged at both ends of the cover plate 13 in the longitudinal direction.
  • the direction in which the plurality of power storage elements 10 are arranged is the X axis of the orthogonal coordinate system
  • the direction in which the short wall portions 124 of the case 11 face each other is the Y axis of the orthogonal coordinate system (the first direction). direction)
  • the direction in which the cover plate 13 and the closing portion 121 face each other is defined as the Z-axis (second direction) of the orthogonal coordinate system.
  • the short wall portion 124 widens in the Y-axis direction and the Z-axis direction.
  • the closing portion 121 spreads in the X-axis direction and the Y-axis direction.
  • Each of the plurality of busbars 8 is a plate-like member having conductivity such as metal.
  • Each bus bar 8 electrically connects the external terminals 14 of the storage elements 10 to each other.
  • the plurality of busbars 8 of the present embodiment connect (make conductive) the plurality of power storage elements 10 included in the power storage device 1 in series.
  • the adjacent member 2 has insulating properties, and is a member arranged in the X-axis direction between the energy storage elements 10 arranged in the X-axis direction, or between the energy storage elements 10 and the energy storage elements 10 (in the example of this embodiment, the holding member 4 part of the The adjacent member 2 of this embodiment is made of resin.
  • the adjacent member 2 forms a channel through which a fluid for temperature adjustment (a gas such as air in the example of the present embodiment) can flow between adjacent storage elements 10 .
  • the power storage device 1 of this embodiment includes a plurality of adjacent members 2, and the plurality of adjacent members 2 includes multiple types of adjacent members 2A, 2B, and 2C.
  • the plurality of adjacent members 2 includes a first adjacent member 2A arranged between two adjacent energy storage elements 10 and a second adjacent member 2A arranged between adjacent energy storage elements 10 and fixed to the holding member 4. and a third adjacent member 2C adjacent to the storage element 10 between the holding member 4 and the storage element 10 at the end in the X-axis direction.
  • the power storage device 1 includes, as adjacent members 2, a first adjacent member 2A, a second adjacent member 2B, and a third adjacent member 2C.
  • the power storage device 1 of this embodiment includes a plurality of first adjacent members 2A, one second adjacent member 2B, and two (a pair of) third adjacent members 2C.
  • Each of the plurality of first adjacent members 2A is arranged between the storage elements 10 except between the storage elements 10 where the second adjacent members 2B are arranged.
  • the second adjacent member 2B is fixed by the first fastening member B to the holding member 4 (specifically, the extension member 42).
  • the holding member 4 surrounds the plurality of storage elements 10 and the plurality of adjacent members 2 to hold the plurality of storage elements 10 and the plurality of adjacent members 2 together.
  • the holding member 4 is made of a conductive member such as metal.
  • the holding member 4 includes a pair of terminal members 41 arranged on both sides of the plurality of energy storage elements 10 (stacked body of energy storage elements 10) in the X-axis direction, and and a connecting member 43 connecting the terminating member 41 and the extending member 42 .
  • the holding member 4 of the present embodiment has a pair of extension members 42 , which are arranged on both sides of the plurality of storage elements 10 in the Y-axis direction, and which serve as a pair of termination members. 41 is connected.
  • the holding member 4 of this embodiment has a plurality of connecting members 43 .
  • Each of the pair of terminating members 41 is arranged so as to sandwich the third adjacent member 2C between the power storage element 10 arranged at the end (outermost) in the X-axis direction.
  • Each of the pair of terminating members 41 has a rectangular plate shape with a size corresponding to that of the storage element 10 .
  • each terminal member 41 has a rectangular shape elongated in the Y-axis direction.
  • each of the pair of extending members 42 has an extending side surface portion (first main body portion) 44 extending in a direction orthogonal to the Y-axis direction in which the plurality of storage elements 10 are arranged. , an extended bottom surface portion (first piece portion ) 45 and Each of the extended side portion 44 and the extended bottom portion 45 is arranged along the plurality of power storage elements 10 (see FIG. 2).
  • the extended bottom surface portion 45 extends from one end of the extended side surface portion 44 in the Z direction.
  • Each of the pair of extending members 42 extends in the Y-axis direction from the end of the extending side surface portion 44 in the Z-axis direction orthogonal to the Y-axis direction and extends in the X-axis direction orthogonal to each of the Y-axis direction and the Z-axis direction. It has an extended top surface portion 46 and a pair of extended end surface portions 47 extending in the Y-axis direction and extending in the Z-axis direction along the termination member 41 from each end portion in the X-axis direction of the extended side surface portion 44 .
  • the extended side portion 44 faces the short wall portion 124 of each storage element 10 .
  • the extended side surface portion 44 has a plate shape extending along the short wall portion 124 of each storage element 10, and has a plurality of through holes 440 penetrating in the Y-axis direction so that the temperature-adjusting fluid can flow into or out of each channel.
  • the extended bottom surface portion 45 extends from one end of the extended side surface portion 44 in the Z-axis direction along the closed portion 121 of each storage element 10 in the Y-axis direction and in the X-axis direction.
  • the extended bottom portion 45 has a belt-like shape elongated in the X-axis direction, and has a constant dimension (width) in the Y-axis direction at each position except for both end portions in the X-axis direction.
  • the extended bottom surface portion 45 has a first surface 451 facing the plurality of power storage elements 10 in the Z-axis direction, and a second surface 452 that is the rear surface of the first surface 451. .
  • both the first surface 451 and the second surface 452 of the stretching bottom portion 45 are flat surfaces.
  • the extended bottom surface portion 45 includes a piece main body 453 having a first surface 451 and a second surface 452, and extending in a direction from the piece main body 453 toward the insulating member 7 (upward in FIG. 4A). and an engaging portion 454 that protrudes and engages with the insulating member 7 .
  • the piece main body 453 extends in the Y-axis direction and in the X-axis direction along the closed portion 121 of each storage element 10 from one end of the extended side surface portion 44 in the Z-axis direction (see FIG. 5).
  • the engaging portion 454 is a protruding portion that protrudes toward the storage element 10 from the intermediate region 450 excluding the ends of the piece body 453 in the X-axis direction and the Y-axis direction.
  • the engaging portion 454 extends in the Z-axis direction.
  • the first surface of the piece main body 453 that faces the plurality of power storage elements 10 in the Z-axis direction constitutes the first surface 451 of the extended bottom surface portion 45 .
  • the second surface which is the back surface of the first surface, constitutes the second surface 452 of the extended bottom surface portion 45 .
  • a plurality of, for example, two engaging portions 454 are provided with a gap in the X-axis direction.
  • One engaging portion 454 may be provided on the extended bottom portion 45 .
  • the engaging portion 454 is a plate-like portion (for example, a rectangular plate-like portion).
  • the engaging portion 454 engages with the insulating member 7 .
  • the engaging portion 454 has a base portion 455 connected to the piece main body 453, a tip portion 456 that engages with the insulating member 7, and a connection portion 457 that connects the base portion 455 and the tip portion 456.
  • a base portion 455, a connection portion 457, and a tip portion 456 are continuously arranged in order from the far side from the storage element 10 in the Z-axis direction.
  • the base portion 455 and the tip portion 456 are plate-like portions extending in the X-axis direction and in the Y-axis direction (see FIG. 6).
  • the connection portion 457 is a flat plate-like portion that extends obliquely with respect to the base portion 455 and the tip portion 456 .
  • the connecting portion 457 is arranged with a gap in the Z-axis direction with respect to the piece main body 453 .
  • the extended top surface portion 46 extends from the other end of the extended side surface portion 44 in the Z-axis direction along the cover plate 13 of each storage element 10 in the Y-axis direction and in the X-axis direction.
  • the extended top surface portion 46 has a belt-like shape elongated in the X-axis direction, and has a constant dimension (width) in the Y-axis direction at each position except for both end portions in the X-axis direction.
  • the width of the extended top surface portion 46 is smaller than the width of the extended bottom surface portion 45 (see FIG. 3).
  • the insulating member 7 has insulating properties. This insulating member 7 is arranged between the extending member 42 and the plurality of power storage elements 10 .
  • the power storage device 1 of this embodiment includes a pair of insulating members 7 , and each insulating member 7 covers a region of the extension member 42 facing at least the plurality of power storage elements 10 . Thereby, each insulating member 7 insulates between the extending member 42 and the plurality of storage elements 10 .
  • the insulating member 7 is provided between the plurality of storage elements 10 and the extending side surface portion 44 of the extending member 42, and the insulating member 7 extends along the extending side surface portion 44.
  • the insulating bottom surface that is connected to the Z-axis direction end of the insulating side surface portion 70 between the side surface portion (second main body portion) 70 and the plurality of power storage elements 10 and the extended bottom surface portion 45 and spreads along the extended bottom surface portion 45 A portion (second piece portion) 71 is provided.
  • the insulating bottom surface portion 71 extends from one end of the insulating side surface portion 70 in the Z-axis direction.
  • the insulating member 7 has an insulating top surface portion 72 that extends in the Y-axis direction from the end portion of the insulating side surface portion 70 in the Z-axis direction orthogonal to the Y-axis direction and extends in the X-axis direction orthogonal to the Y-axis direction and the Z-axis direction.
  • the insulating side surface portion 70 faces the short wall portion 124 of each storage element 10 .
  • the insulating side surface portion 70 has a plate-like shape extending along the short wall portion 124 of each electric storage element 10 .
  • Each through hole 440 has a corresponding through hole 700 in size and shape.
  • the insulating side surface portion 70 is sandwiched between the short wall portion 124 of the storage element 10 and the extending side surface portion 44 of the extending member 42 in the Y-axis direction.
  • the insulating top surface portion 72 extends from the other end of the insulating side surface portion 70 in the Z-axis direction along the cover plate 13 of each storage element 10 in the Y-axis direction and in the X-axis direction.
  • the insulating top surface portion 72 has a belt shape elongated in the X-axis direction, and has a constant dimension (width) in the Y-axis direction at each position except for both end portions in the X-axis direction.
  • the width of the insulating top surface portion 72 is smaller than the width of the insulating bottom surface portion 71, as shown in FIG.
  • the insulating top surface portion 72 includes a first portion 720 that is continuous with the other end of the insulating side surface portion 70 in the Z-axis direction, a second portion 721 that covers the front surface and the back surface of the extended top surface portion 46 together with the first portion 720, A third portion 722 connects the first portion 720 and the second portion 721 and covers the edge of the extended top surface portion 46 .
  • the insulating bottom surface portion 71 extends from one end of the insulating side surface portion 70 in the Z-axis direction along the closed portion 121 of each storage element 10 in the Y-axis direction and in the X-axis direction.
  • the insulating bottom surface portion 71 has a strip shape elongated in the X-axis direction, and has a constant dimension (width) in the Y-axis direction at each position except for both end portions in the X-axis direction.
  • the insulating bottom surface portion 71 has a first surface 711 facing the plurality of power storage elements 10 in the Z-axis direction, and a second surface 712 that is the rear surface of the first surface 711 .
  • the first surface 711 of the insulating bottom surface portion 71 is a flat surface.
  • the second surface 712 of the insulating bottom surface portion 71 is an uneven surface as shown in FIG.
  • the insulating bottom surface portion 71 has a rib 7120 that extends in the Y-axis direction and protrudes away from the power storage element 10 in the Z-axis direction.
  • a plurality of ribs 7120 are provided at intervals in the X-axis direction.
  • the direction from the piece main body 453 toward the insulating bottom surface portion 71 coincides with the projecting direction of the engaging portion 454 (upward in FIG. 4A).
  • the insulating bottom surface portion 71 is engaged with the engaging portion 454 .
  • the insulating bottom portion 71 engages the extended bottom portion 45 (see FIG. 4A). Specifically, the extended bottom surface portion 45 and the insulating bottom surface portion 71 are engaged so as to restrict movement in the separation direction (Z-axis direction). In the power storage device 1, the insulating bottom surface portion 71 is engaged with the extended bottom surface portion 45 in an intermediate region 450 excluding the ends of the extended bottom surface portion 45 in the Y-axis direction and the X-axis direction (see FIG. 5). ). The insulating bottom surface portion 71 engages with the extended bottom surface portion 45 in an intermediate region 450 in the X-axis direction and the Y-axis direction in the region where the laminate of the plurality of storage elements 10 and the plurality of adjacent members 2 is provided.
  • the fixing position of the extending member 42 as a reference, the position where the insulating member 7 and the extending member 42 are fixed by the first fastening member B and the connecting member 43 between the terminating member 41 and the extending member 42 are The insulating bottom surface portion 71 engages with the extended bottom surface portion 45 in a region between the fixed position and the regions excluding the respective ends in the X-axis direction and the Y-axis direction.
  • the adjacent member 2 the area between the position of the second adjacent member 2B and the position of the third adjacent member 2C, excluding the respective ends in the X-axis direction and the Y-axis direction, The insulating bottom portion 71 is engaged with the extended bottom portion 45 .
  • the insulating bottom surface portion 71 does not exceed the second surface 452 in the direction from the insulating bottom surface portion 71 toward the extended bottom surface portion 45 (downward in FIG. 10 side) and is arranged between the plurality of storage elements 10 and the extended bottom portion 45 . More specifically, the entire insulating bottom surface portion 71 is covered with the extended bottom surface portion 45 from a position far from the storage element 10 in the Z-axis direction. The insulating bottom surface portion 71 is sandwiched between the closing portion 121 of the storage element 10 and the extending bottom surface portion 45 of the extending member 42 in the Z-axis direction.
  • the insulating bottom surface portion 71 has an accommodating portion 710 that accommodates the tip portion 456 of the engaging portion 454 at the extended end portion. As shown in FIG. 7, a plurality of, for example, two housing portions 710 are arranged at intervals in the X-axis direction.
  • the accommodating portion 710 is a bag-like portion that covers the engaging portion 454 .
  • the dimension of the accommodating portion 710 in the X-axis direction is slightly larger than the dimension of the engaging portion 454 in the X-axis direction.
  • the engaging portion 454 is inserted into the accommodating portion 710 in the Y-axis direction.
  • the housing portion 710 of this embodiment includes a pair of covering portions 713 that cover the tip portion 456 from both sides in the Z-axis direction, and a pair of covering portions 713 (one covering portion 715 and the other covering portion 716) of the rib 7120. and connecting ribs 714 that connect and cover the sides of the tip 456 .
  • Accommodating portion 710 has an extending portion 717 extending from the other covering portion 716 away from power storage element 10 in the Z-axis direction.
  • One covered portion 715 of the pair of covered portions 713 is arranged on the side closer to the storage element 10 in the Z-axis direction.
  • the other covering portion 716 of the pair of covering portions 713 is arranged on the far side from the storage element 10 in the Z-axis direction.
  • the other covering portion 716 is arranged in a pair with a gap in the X-axis direction.
  • the covered portions 716 are arranged so as to approach from one end in the Z-axis direction of two ribs 7120 adjacent in the X-axis direction toward the other in the X-axis direction. It consists of two pieces arranged.
  • the ends of these two covering portions 716 in the X-axis direction are not in contact with each other and are separated from each other, and a slit-like gap is formed between the two covering portions 716 .
  • shrinkage in the housing portion 710 can be prevented when the insulating member 7 is molded from a resin material.
  • the covering portion 716 is formed from the center of the insulating bottom surface portion 71 in the Y-axis direction to the tip of the insulating side surface portion 70 on the side away from the Y-axis portion. It is not formed on the side closer to the insulating side surface portion 70 from the center of the direction.
  • a tip portion 456 of the engaging portion 454 is inserted into the accommodating portion 710 along the Y-axis direction from a region where the covering portion 716 is not formed.
  • the extending portion 717 is adjacent to the piece main body 453 of the extending bottom portion 45 in the Y-axis direction.
  • the extending portion 717 extends from one end to the other end in the X-axis direction along the periphery of the extended bottom portion 45 .
  • the movement of the insulating bottom surface portion 71 with respect to the extending bottom surface portion 45 is suppressed by the engagement between the extending bottom surface portion 45 of the extending member 42 and the insulating bottom surface portion 71 of the insulating member 7 .
  • extended bottom surface portion 45 and insulating bottom surface portion 71 are engaged so as to restrict movement in the Z-axis direction. Axial movement is suppressed.
  • the engagement between the engaging portion 454 and the accommodating portion 710 cannot suppress relative movement between the extended bottom portion 45 and the insulating bottom portion 71 in the X-axis direction and the Y-axis direction. Since the extending portion 717 of the insulating bottom portion 71 is adjacent to the piece main body 453 of the extending bottom portion 45 in the Y-axis direction, the relative movement in the Y-axis direction is suppressed. Since the extending portion 717 extends from one end to the other end in the X-axis direction along the periphery of the extended bottom portion 45, the relative movement in the X-axis direction is suppressed.
  • the extended bottom surface portion 45 and the insulating bottom surface portion 71 are engaged in the intermediate region 450 excluding the ends of the extended bottom surface portion 45 in the Y-axis direction and the X-axis direction. , the movement of the insulating bottom portion 71 in the intermediate region 450 is effectively suppressed.
  • the insulating bottom surface portion 71 is arranged between the plurality of power storage elements 10 and the extended bottom surface portion 45 without exceeding the second surface 452 of the extended bottom surface portion 45 in the Z-axis direction. 4B, a portion of the insulating bottom surface portion 71 extends beyond the second surface 452 of the extended bottom surface portion 45. Therefore, the power storage in the Z-axis direction is equal to the dimension L of the portion exceeding the second surface 452.
  • the size of the device 1 can be suppressed (that is, downsizing in the Z-axis direction).
  • each part of the insulating bottom surface portion 71 is connected to the extending bottom surface portion 71 by a simple configuration in which the engaging portion 454 protruding from the piece main body 453 of the extending bottom surface portion 45 is engaged with the insulating bottom surface portion 71.
  • a configuration in which the extended bottom surface portion 45 and the insulating bottom surface portion 71 are engaged without exceeding the second surface 452 of 45 can be easily realized.
  • the power storage device 1 of the present invention is not limited to the above-described embodiment, and it goes without saying that various modifications can be made without departing from the gist of the present invention.
  • the configuration of one embodiment can be added to the configuration of another embodiment, and part of the configuration of one embodiment can be replaced with the configuration of another embodiment. A part of the configuration of an embodiment can be deleted.
  • the extended bottom surface portion 45 and the insulating bottom surface portion 71 are engaged in the intermediate region 450 excluding the ends of the extended bottom surface portion 45 in the Y-axis direction and the X-axis direction.
  • 45 and the insulating bottom portion 71 may engage with each end of the extended bottom portion 45 in the Y-axis direction and the X-axis direction.
  • the extended bottom surface portion 45 and the insulating bottom surface portion 71 can engage with each other at both ends in the Y-axis direction and both ends in the X-axis direction of the extended bottom surface portion 45 .
  • the insulating bottom surface portion 71 was arranged between the plurality of power storage elements 10 and the extending bottom surface portion 45 in a state not exceeding the second surface 452 of the extending bottom surface portion 45 in the Z-axis direction.
  • a part of the bottom surface portion 71 may be arranged between the plurality of power storage elements 10 and the extended bottom surface portion 45 in a state where the bottom surface portion 71 partially exceeds the second surface 452 of the extended bottom surface portion 45 .
  • the engaging portion 454 protruding from the piece main body 453 of the extended bottom portion 45 is engaged with the insulating bottom portion 71.
  • An engaging portion protruding from the insulating bottom portion 71 may be engaged with the extended bottom portion 45 .
  • the insulating bottom surface portion 71 has the bag-shaped accommodation portion 710 that accommodates the distal end portion 456 of the engaging portion 454 at the extending end portion. It may be an (annular) accommodation portion. Although the engaging portion 454 is inserted into the accommodation portion 710 in the Y-axis direction, the engaging portion 454 may be inserted in another direction (such as the X-axis direction).
  • the housing portion 710 may be formed without using the ribs 7120 (specifically, the connecting ribs 714). In the housing portion 710, the pair of covering portions 713 may be connected to the rib 7120 by a separately provided connecting portion. Although a pair of accommodating portions 710 are provided spaced apart in the X-axis direction, one may be provided or may be provided continuously in the Y-axis direction. may be provided.
  • the extending bottom surface portion 45 of the extending member 42 and the insulating bottom surface portion 71 are engaged with each other. However, it may be engaged with another portion of the insulating member 7 (the insulating top surface portion 72).
  • the member adjacent to the plurality of energy storage elements 10 is the member (stretching member 42) adjacent in the direction (Y-axis direction) perpendicular to the stacking direction of the energy storage elements 10. It may be a member that is adjacent (in the axial direction) (the terminal member 41 in the example of the above embodiment).
  • the terminating member 41 engages the insulating member 7 .
  • the termination member 41 has a rectangular plate shape (a termination body portion (first body portion) extending in a direction a terminal bottom surface portion (first piece portion) extending in the Y-axis direction from the direction end portion and extending in the X-axis direction orthogonal to each of the Y-axis direction and the Z-axis direction.
  • the insulating member 7 is arranged between the terminating member (the terminating main body portion and the insulating bottom surface portion) and the stack of the storage elements 10, and is a first portion that is arranged between the terminating main body portion and the stack of the storage elements 10. and a second portion disposed between the terminal bottom portion and the laminate. The terminal bottom portion and the second portion of the insulating member 7 are engaged.
  • the power storage device includes a rectangular tube-shaped power storage element, but may include a laminate-type power storage element.
  • a laminate-type electric storage device includes a sealed container containing an electrode body together with an electrolyte and made of a laminate film.
  • the laminated energy storage device has a first side extending along the Z-axis direction and a second side adjacent to the first side and extending along the Y-axis direction.
  • the laminated energy storage device has a first side extending along the Z-axis direction and a second side adjacent to the first side and extending along the Y-axis direction.
  • This second side sandwiches the insulating bottom surface portion 71 of the insulating member 7 together with the extending bottom surface portion 45 of the extending member 42 in the Z-axis direction.
  • the storage element is used as a chargeable/dischargeable non-aqueous electrolyte secondary battery (for example, a lithium ion secondary battery), but the type and size (capacity) of the storage element are arbitrary.
  • a lithium ion secondary battery has been described as an example of the storage element, but the storage element is not limited to this.
  • the present invention can also be applied to various secondary batteries, primary batteries, and electric storage elements of capacitors such as electric double layer capacitors.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Battery Mounting, Suspending (AREA)
PCT/JP2023/001439 2022-01-26 2023-01-19 蓄電装置 Ceased WO2023145585A1 (ja)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US18/833,387 US20250149764A1 (en) 2022-01-26 2023-01-19 Energy storage apparatus
JP2023576838A JPWO2023145585A1 (https=) 2022-01-26 2023-01-19
CN202380018331.5A CN118591936A (zh) 2022-01-26 2023-01-19 蓄电装置

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JP2022-009993 2022-01-26
JP2022009993 2022-01-26

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JP (1) JPWO2023145585A1 (https=)
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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017016968A (ja) * 2015-07-06 2017-01-19 株式会社Ｇｓユアサ 蓄電装置
JP2019032998A (ja) * 2017-08-08 2019-02-28 株式会社ブルーエナジー 蓄電装置、移動体、及び蓄電システム
WO2019181508A1 (ja) * 2018-03-23 2019-09-26 株式会社Ｇｓユアサ 蓄電装置
WO2020137411A1 (ja) * 2018-12-27 2020-07-02 株式会社Ｇｓユアサ 蓄電装置
JP2020140762A (ja) * 2017-06-22 2020-09-03 三洋電機株式会社 電源装置及びこれを備える車両並びに蓄電装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017016968A (ja) * 2015-07-06 2017-01-19 株式会社Ｇｓユアサ 蓄電装置
JP2020140762A (ja) * 2017-06-22 2020-09-03 三洋電機株式会社 電源装置及びこれを備える車両並びに蓄電装置
JP2019032998A (ja) * 2017-08-08 2019-02-28 株式会社ブルーエナジー 蓄電装置、移動体、及び蓄電システム
WO2019181508A1 (ja) * 2018-03-23 2019-09-26 株式会社Ｇｓユアサ 蓄電装置
WO2020137411A1 (ja) * 2018-12-27 2020-07-02 株式会社Ｇｓユアサ 蓄電装置

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