WO2023145586A1 - 蓄電装置 - Google Patents

蓄電装置 Download PDF

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Publication number
WO2023145586A1
WO2023145586A1 PCT/JP2023/001440 JP2023001440W WO2023145586A1 WO 2023145586 A1 WO2023145586 A1 WO 2023145586A1 JP 2023001440 W JP2023001440 W JP 2023001440W WO 2023145586 A1 WO2023145586 A1 WO 2023145586A1
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WO
WIPO (PCT)
Prior art keywords
main body
power storage
axis direction
terminating
adjacent
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/JP2023/001440
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
洋介 西村
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 US18/832,386 priority Critical patent/US20250183489A1/en
Priority to CN202380018835.7A priority patent/CN118613954A/zh
Priority to JP2023576839A priority patent/JPWO2023145586A1/ja
Publication of WO2023145586A1 publication Critical patent/WO2023145586A1/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
    • H01M50/20—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
    • 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
    • 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
    • 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
    • H01M50/296—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by terminals of battery packs
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/503—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the shape of the interconnectors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/507—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing comprising an arrangement of two or more busbars within a container structure, e.g. busbar modules
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • 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 including power storage elements.
  • the power supply device 500 includes a battery stack 502 in which a plurality of battery cells 501 are stacked, and a pair of end plates arranged at both ends of the battery stack 502 in the stacking direction. 503 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.
  • a pair of end plates 503 cover both end surfaces 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 506 is arranged on both side surfaces of the battery stack 502 having end plates 503 stacked on both ends, and the end portions thereof 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 lower end bent piece that is bent at the lower end side, and partially covers the corners of the lower 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.
  • the battery stack 502 is sandwiched by a pair of end plates 503 and bind bars 504 with a large force in the stacking direction. Therefore, in recent years, each component of the power supply device 500 is required to have sufficient rigidity.
  • the corresponding ends of the upper bent piece (first bent piece 508) and the end plate fixing piece (third bent piece 510, fourth bent piece 511) are connected. It is conceivable to improve the rigidity of the bind bar 504 (specifically, the main body plate 506).
  • the end edge (peripheral edge) of the end plate 503 and the edge of the connected portion of the main body plate 506 interfere (contact) in a state of intersecting and facing each other. There is concern that a large stress concentration will occur in , and that the body plate 506 and the end plate 503 will be damaged.
  • An object of the present embodiment is to provide a power storage device capable of suppressing interference between the edge of the terminating member and the edge of the connecting member.
  • the power storage device of this embodiment is a laminate having a plurality of power storage elements arranged in a first direction; a pair of terminating members sandwiching the laminate in the first direction; a connection member that connects corresponding ends of the pair of termination members in a second direction perpendicular to the first direction; at least one of the pair of terminating members has a terminating member main body extending in a direction orthogonal to the first direction; When viewed from the first direction, the terminating member body extends along the second direction at each end in a third direction orthogonal to each of the first direction and the second direction in the terminating member body.
  • connection member is a connection member main body extending in the first direction at a position adjacent to the laminate in the second direction; a first piece extending from one end of the connection member main body in the third direction along a direction approaching the laminate in the second direction and extending along the first direction; A second piece portion extending in the second direction and extending in the third direction from one end of the connection member main body in the first direction along a surface of the terminating member main body opposite to the laminate side.
  • connection portion connecting corresponding ends of the first piece portion and the second piece portion;
  • a first edge that is an edge of a portion that connects the first side and the second side in the termination member main body, and a second edge that includes the edges of the connecting portion and the second piece portion , each having opposing portions that face each other so as to intersect,
  • An end portion including the facing portion of at least one of the terminating member and the connecting portion is bent away from the facing portion on the other side with respect to a portion adjacent to the end portion.
  • FIG. 1 is a perspective view of a power storage device according to this embodiment.
  • FIG. 2 is a front view of the power storage device.
  • FIG. 3 is a plan view of the power storage device.
  • FIG. 4 is an enlarged view of the portion indicated by IV in FIG.
  • FIG. 5 is an exploded perspective view of the power storage device with a part of the configuration omitted.
  • FIG. 6 is a front view of a terminating member included in the power storage device.
  • FIG. 7 is an exploded perspective view of the termination member;
  • FIG. 8 is an exploded perspective view of the termination member;
  • FIG. 9 is a front view of a second member included in the termination member;
  • FIG. 10 is a side view of the second member;
  • FIG. 1 is a perspective view of a power storage device according to this embodiment.
  • FIG. 2 is a front view of the power storage device.
  • FIG. 3 is a plan view of the power storage device.
  • FIG. 4 is an enlarged view of the portion
  • FIG. 11 is an enlarged side view of one end of the second member in the Z-axis direction.
  • FIG. 12 is a partially enlarged view of the corner of the terminal member and its peripheral portion viewed from the first member side.
  • FIG. 13 is a side view of a connection member provided in the power storage device, with an intermediate portion omitted.
  • FIG. 14 is a front view of the connecting member;
  • FIG. 15 is a plan view of the connecting member with an intermediate portion omitted.
  • FIG. 16 is an enlarged perspective view of the end of the connecting member;
  • FIG. 17 is a perspective view of a conventional power supply device.
  • FIG. 18 is an exploded perspective view of the power supply device.
  • the power storage device of the present embodiment is a laminate having a plurality of power storage elements arranged in a first direction; a pair of terminating members sandwiching the laminate in the first direction; a connection member that connects corresponding ends of the pair of termination members in a second direction orthogonal to the first direction; at least one of the pair of terminating members has a terminating member main body extending in a direction orthogonal to the first direction; When viewed from the first direction, the terminating member body extends along the second direction at each end in a third direction orthogonal to each of the first direction and the second direction in the terminating member body.
  • connection member is a connection member main body extending in the first direction at a position adjacent to the laminate in the second direction; a first piece extending from one end of the connection member main body in the third direction along a direction approaching the laminate in the second direction and extending along the first direction; A second piece portion extending in the second direction and extending in the third direction from one end of the connection member main body in the first direction along a surface of the terminating member main body opposite to the laminate side.
  • connection portion connecting corresponding ends of the first piece portion and the second piece portion;
  • a first edge that is an edge of a portion where the first side and the second side are connected in the terminating member main body, and a second edge that includes the edges of the connecting portion and the second piece portion and have opposing portions that face each other so as to intersect,
  • An end portion including the facing portion of at least one of the terminating member and the connecting portion is bent away from the facing portion on the other side with respect to a portion adjacent to the end portion.
  • the terminating member main body has the end portion including the facing portion and a fixed portion to which the second piece portion is fixed, In the termination member main body, the end portion including the facing portion and the fixed portion may be adjacent to each other.
  • the terminating member main body has a first member and a second member that are arranged in order in the direction away from the laminate in the first direction and are in contact with each other,
  • the second member includes the end portion including the facing portion, A portion of the first member corresponding to the end including the facing portion of the second member is not in contact with the second member, or the first member contacts the facing portion of the second member. It does not have to be arranged in a region that overlaps the containing end when viewed from the first direction.
  • 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 electric storage device 1 includes a laminate D having a plurality of electric storage elements 10 arranged in a predetermined direction, a pair of end members 30 sandwiching the laminate D in the predetermined direction, and a pair of end members 30. and a connection member 35 that connects the members 30 to each other.
  • the electricity storage device 1 of the present embodiment has a laminate D in which the electricity storage elements 10 and the adjacent members 2 are alternately arranged in the predetermined direction, the terminal member 30 and the connection member 35, and the laminate D is and a holding member 3 for holding.
  • This power storage device 1 includes a first fastening member 5 that fixes at least one adjacent member 2 to a holding member 3 , a laminate D (more specifically, a plurality of power storage elements 10 included in the laminate D), and a holding member 3 . and at least one insulator 6 arranged between them, and a plurality of bus bars 8 electrically connecting different storage elements 10 to each other.
  • 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 the site.
  • the closing portion 121 has a rectangular 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.
  • the trunk portion 122 has a pair of long wall portions 123 extending from the long sides of the peripheral edge of the closing portion 121 and a pair of short wall portions 124 extending from the short sides of the peripheral edge of the closing portion 121 .
  • 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 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 portion that is electrically connected to the external terminal 14 of another storage element 10 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 direction in which the plurality of power storage elements 10 are arranged is the X-axis direction of the orthogonal coordinate system
  • the direction in which the short walls 124 of the case 11 face each other is the Y direction of the orthogonal coordinate system.
  • the axial direction and the direction (third direction) in which the cover plate 13 and the closing portion 121 face each other are defined as the Z-axis direction of the orthogonal coordinate system.
  • Adjacent member 2 is a member (holding member 3 in the example of the present embodiment) that has insulating properties and is arranged between storage elements 10 arranged in the X-axis direction, or between storage elements 10 and storage elements 10 in the X-axis direction. part of the The adjacent member 2 of this embodiment is made of resin. The adjacent member 2 forms a flow path (flow path space) R through which a fluid for temperature adjustment (gas such as air in the example of the present embodiment) can flow between the 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 3. and a third adjacent member 2C adjacent to the storage element 10 between the holding member 3 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.
  • Each of the plurality of first adjacent members 2A includes a first body portion 21A extending in a direction perpendicular to the X-axis direction between the energy storage elements 10 adjacent in the X-axis direction, and the energy storage elements 10 adjacent to the first body portion 21A. and at least one first restricting portion 25A that restricts movement with respect to the first main body portion 21A.
  • Each of the plurality of first adjacent members 2 ⁇ /b>A forms at least one flow path R through which the temperature adjusting fluid can flow between adjacent power storage elements 10 .
  • the first main body portion 21A is a portion that faces the long wall portion 123 of the case 11 of the storage element 10 while being partially in contact with the long wall portion 123 .
  • the first body portion 21A forms a channel R in cooperation with the adjacent storage element 10, through which the fluid for temperature adjustment can flow.
  • the first main body portion 21A of the present embodiment has a rectangular shape with a size corresponding to that of the power storage element 10 when viewed from the X-axis direction, and along the XZ plane (a plane including the X-axis direction and the Z-axis direction).
  • the cross-sectional shape is a rectangular waveform.
  • the first restricting portion 25A extends in the X-axis direction from at least the corners of the rectangular first body portion 21A, and extends between the storage element 10 (specifically, the case 11) adjacent to the first body portion 21A and the YZ plane (Y By contacting from the outside in the plane (including the axial direction and the Z-axis direction), the storage element 10 is restricted from moving relative to the first body portion 21A in the YZ plane direction.
  • the first restricting portion 25A of this embodiment extends from the first body portion 21A toward one side and the other side in the X-axis direction.
  • the second adjacent member 2B includes a second body portion 21B extending in a direction (YZ plane direction) perpendicular to the X-axis direction between two adjacent power storage elements 10, and a holding member for the second adjacent member 2B. and a second fastening member 22B used for fixing to 3.
  • the second adjacent member 2B has at least one second restricting portion 25B that restricts movement of the storage element 10 adjacent to the second body portion 21B with respect to the second body portion 21B.
  • the second adjacent member 2B also forms at least one channel R through which the temperature adjusting fluid can flow between adjacent storage elements 10 .
  • the second main body portion 21B is a portion that faces the long wall portion 123 of the case 11 of the storage element 10 while being partially in contact with the long wall portion 123 .
  • the second main body portion 21B forms a channel R in cooperation with the adjacent storage element 10 so that the fluid for temperature adjustment can flow between the storage element 10 and the storage element 10.
  • the dimension in the X-axis direction of the second body portion 21B is larger than the dimension in the X-axis direction of the first body portion 21A (that is, it is thicker).
  • the second main body portion 21B of the present embodiment has a rectangular shape with a size corresponding to that of the storage element 10 when viewed from the X-axis direction.
  • the second body portion 21B has a plurality of ridges 211B each extending in the Y-axis direction and arranged at intervals in the Z-axis direction.
  • the plurality of ridges 211B protrude from a surface 212B of the second body portion 21B facing the storage element 10 .
  • the second fastening member 22B is arranged at each end in the Y-axis direction of the second body portion 21B.
  • Each of the plurality of second fastening members 22B fastens the second adjacent member 2B and the holding member 3 by engaging with the first fastening member 5 .
  • Each second fastening member 22B of this embodiment is an insert nut.
  • Each first fastening member 5 of the present embodiment is a bolt, and by engaging (screwed) with the second fastening member 22B in a state where the holding member 3 is inserted, the second adjacent member 2B and the holding member 3 are connected. to conclude.
  • the second restricting portion 25B extends in the X-axis direction from at least the corners of the rectangular second body portion 21B, and extends in the YZ plane direction from the storage element 10 (specifically, the case 11) adjacent to the second body portion 21B.
  • the contact from the outside restricts the relative movement of the storage element 10 with respect to the second body portion 21B in the YZ plane direction.
  • the second restricting portion 25B of the present embodiment extends from the second body portion 21B toward one side and the other side in the X-axis direction.
  • Each of the two third adjacent members 2C is orthogonal to the X-axis direction between the energy storage element 10 and a part of the holding member 3 (the terminating member 30 in the example of this embodiment) that are adjacent to each other in the X-axis direction. It has a third body portion 21C that spreads in the direction, and at least one third restricting portion 25C that restricts movement of the storage element 10 adjacent to the third body portion 21C with respect to the third body portion 21C.
  • Each of the two third adjacent members 2 ⁇ /b>C forms at least one flow path R through which the temperature adjusting fluid can flow between the adjacent storage elements 10 .
  • the third main body portion 21C is a portion that faces the long wall portion 123 of the storage element 10 while being partially in contact with the long wall portion 123 .
  • the third main body portion 21C also cooperates with the adjacent power storage element 10, similarly to the first main body portion 21A of the first adjacent member 2A and the second main body portion 21B of the second adjacent member 2B. and form a channel R through which a fluid for temperature adjustment can flow.
  • the third main body portion 21C of the present embodiment has a rectangular shape with a size corresponding to that of the storage element 10 when viewed from the X-axis direction.
  • the third main body portion 21C has a plurality of ridges 211C each extending in the Y-axis direction and arranged at intervals in the Z-axis direction. 211 C of these protrusion streaks protrude from 212 C of opposing surfaces with the electrical storage element 10 in the 3rd main-body part 21C.
  • the third restricting portion 25C extends in the X-axis direction from at least the corners of the rectangular third main body portion 21C, and extends in the YZ plane direction from the storage element 10 (specifically, the case 11) adjacent to the third main body portion 21C.
  • the contact from the outside restricts the relative movement of the storage element 10 with respect to the third body portion 21C in the YZ plane direction.
  • the third restricting portion 25C of the present embodiment extends from the third main body portion 21C toward one side in the X-axis direction (the power storage element 10 side).
  • the holding member 3 holds the laminate D by surrounding the laminate D including the plurality of storage elements 10 and the plurality of adjacent members 2 . That is, the holding member 3 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 3 is made of a conductive member such as metal.
  • the holding member 3 includes a pair of terminal members 30 arranged on both sides of the laminate D in the X-axis direction, and a connection member extending along the X-axis direction at a position adjacent to the laminate D in the Y-axis direction. 35 and .
  • the holding member 3 of this embodiment has a pair of connecting members 35 spaced apart in the Y-axis direction, each of the pair of connecting members 35 corresponding to the pair of terminal members 30 in the Y-axis direction. Connect the ends.
  • the holding member 3 has at least one fastening member 37 for fastening the terminating member 30 and the connecting member 35 .
  • the holding member 3 of this embodiment has a plurality of fastening members 37 .
  • Each of the pair of termination members 30 has a termination member main body 301 extending in a direction orthogonal to the X-axis direction, as also shown in FIG.
  • the termination member main body 301 When viewed from the X-axis direction, the termination member main body 301 has a first side 321A extending along the Y-axis direction at each end in the Z-axis direction of the termination member main body 301, and a Y-axis direction and a second side 321B extending along the Z-axis direction at each end of the rectangular shape.
  • the termination member main body 301 has a rectangular shape corresponding to the size of the storage element 10, and has connecting through holes 3011 extending in the X-axis direction at the four corners.
  • the termination member 30 has four connection through-holes 3011 .
  • the connecting through-hole 3011 and the through-hole peripheral portion 3012 of the connecting through-hole 3011 constitute a fixed portion F used for fixing (connecting) the connecting member 35 to the terminating member 30 .
  • the terminal member 30 includes a first member 31 and a second member 32 which are arranged in order in the direction away from the laminate D in the X-axis direction so that at least a portion thereof is in contact with each other. and has a rectangular shape elongated in the Y-axis direction when viewed from the X-axis direction.
  • the part 321 of the second member 32 has a rectangular contour when viewed from the X-axis direction, and the first side and the second side that constitute the rectangular contour are the above-described constitute the first side 321A and the second side 321B of the terminating member main body 301 (see FIG. 9). That is, the portion 321 of the second member 32 has a first side 321A and a second side 321B.
  • the second member 32 includes a plate-shaped second member main body 321 extending along a direction (YZ plane direction) orthogonal to the X-axis direction, and a direction away from the laminate D in the X-axis direction from the second member main body 321. and a collar portion 322 extending to the .
  • the second member main body 321 has a rectangular shape corresponding to the power storage element 10 when viewed from the X-axis direction, specifically a rectangular shape elongated in the Y-axis direction.
  • One of the corners (ends) 3211 in the Z-axis direction of the second member main body 321 is adjacent to the corner 3211 (adjacent portion) 3212.
  • the connecting member 35 is bent away from the portion (end edge) EF2 facing the corner 3211 (see FIG. 4).
  • the corners 3211 are composed of a first side 321A forming a rectangular outline of the second member main body 321 and extending along the Y-axis direction, and a second side 321B forming the outline and extending along the Z-axis direction. , and the edge (first edge) Ep1 of the corner 3211 is included in the edge Ep of the terminal member 30 (specifically, the second member 32).
  • the adjacent portion 3212 of the present embodiment is a portion extending in a direction orthogonal to the X-axis direction, and the corner portion 3211 is bent with respect to the adjacent portion 3212 so that the first edge Ep1 approaches the laminate D ( 10 and 11).
  • the second member main body 321 has second connection through holes 3215 penetrating in the X-axis direction at the four corners (that is, each corner of the rectangular shape). That is, the second member main body 321 has four second connection through-holes 3215 .
  • the flange portion 322 is a plate-like portion extending in the X-axis direction away from the laminate D in the X-axis direction from one end (upper in FIG. 10) of the second member main body 321 in the Z-axis direction and extending in the Y-axis direction. be.
  • the first member 31 has a rectangular shape corresponding to the second member main body 321 of the second member 32 when viewed from the X-axis direction, more specifically, has a rectangular shape elongated in the Y-axis direction, and is superimposed on the second member 32. ing.
  • the first member 31 is not arranged in a region of the end member 30 that overlaps the corner portion (the end portion including the facing portion Epo) 3211 of the second member 32 when viewed from the X-axis direction (see FIG. 12).
  • the first member 31 has first connecting through-holes 311 (see FIGS. 7 and 8) that penetrate in the X-axis direction at four corners (that is, corners of the rectangular shape). That is, the first member 31 has four first connection through-holes 311 .
  • Each of these four first connection through-holes 311 overlaps each of the second connection through-holes 3215 arranged at the four corners of the second member main body 321 when viewed from the X-axis direction. Thereby, the second connecting through-hole 3215 of the second member body 321 and the first connecting through-hole 311 of the first member 31 are connected in the X-axis direction to form the connecting through-hole 3011 of the terminal member 30 .
  • the first member 31 has a plurality of (two in the example of the present embodiment) protrusions 312 protruding in the X-axis direction toward the storage element 10 .
  • Each of the plurality of protrusions 312 extends in the Y-axis direction and is spaced apart in the Z-axis direction.
  • the top of each protrusion 312 (tip in the direction of protrusion) is in contact with the third adjacent member 2C.
  • the convex portion 312 of this embodiment is formed by drawing.
  • each of the pair of connection members 35 extends in the X-axis direction and extends in the Z-axis direction at a position adjacent to the laminate D in the Y-axis direction.
  • a connecting member main body 350 extending from one end of the connecting member main body 350 in the Z-axis direction, a first piece portion 351 extending in the Y-axis direction toward the laminated body D and extending in the X-axis direction; a pair of second pieces 352 extending in the Y-axis direction and extending in the Z-axis direction along the surface of the terminating member body 301 opposite to the laminate D side from each end of the main body 350 in the X-axis direction; and a connecting portion 353 that connects corresponding ends of the one piece portion 351 and the second piece portion 352 .
  • Each of the pair of connecting members 35 has a third piece portion 354 extending from the other end of the connecting member main body 350 in the Z-axis direction in a direction toward the laminated body D in the Y-axis direction and extending in the X-axis direction.
  • the connection member 35 of this embodiment is formed by drawing or bending a plate member having a predetermined shape.
  • connection member main body 350 is a plate-like portion extending in a direction orthogonal to the Y-axis direction, and has at least one through hole 3501 .
  • the connection member main body 350 of this embodiment has a rectangular shape elongated in the X-axis direction when viewed from the Y-axis direction, and has a plurality of through holes 3501 .
  • the first piece 351 is a strip-shaped part elongated in the X-axis direction.
  • Each second piece 352 has a rectangular shape elongated in the Z-axis direction, and approaches the connection member main body 350 at the boundary with the connection member main body 350 (the end on the connection member main body 350 side in the Y-axis direction).
  • the dimension in the Z-axis direction increases accordingly.
  • the edge (second edge Ef2) of the connection member 35 from the connection portion 353 to the second piece portion 352 has an arc shape when viewed from the X-axis direction (see FIG. 14).
  • the second piece 352 has two through holes 3521 spaced apart in the Z-axis direction.
  • Each through-hole 3521 is a connecting through-hole 3011 of the terminal member 30 (a through-hole in which the first connecting through-hole 311 of the first member 31 and the second connecting through-hole 3215 of the second member main body 321 are connected). placed in corresponding positions.
  • connection portion 353 is a portion that connects the connection member main body 350, the first piece portion 351, and the second piece portion 352, respectively, and the connection portion 353 in this embodiment is a curved portion.
  • the third piece portion 354 is a belt-like portion elongated in the X-axis direction, and the dimension in the Y-axis direction is larger than that of the first piece portion 351 except for both ends in the X-axis direction.
  • Each of the plurality of fastening members 37 connects the terminating member 30 and the connecting member 35 while being inserted through the connecting through hole 3011 of the terminating member 30 and the through hole 3521 of the connecting member 35 (specifically, the second piece portion 352). conclude.
  • Each fastening member 37 of this embodiment is composed of a bolt 371 and a nut 372 .
  • the insulator 6 has insulating properties.
  • the insulator 6 is arranged between the connection member 35 and the laminate D (specifically, the plurality of power storage elements 10 included in the laminate D).
  • the power storage device 1 includes a pair of insulators 6 , and each insulator 6 covers a region of the connection member 35 facing at least the plurality of power storage elements 10 . Thereby, each insulator 6 insulates between the connection member 35 and the plurality of power storage elements 10 .
  • Each insulator 6 has a through hole 61 having a size and shape corresponding to each through hole 3501 of the connecting member body 350 at each position corresponding to each through hole 3501 of the connecting member body 350 .
  • 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 corner 3211 (first The first edge Ep1 included in the edge Ep of the terminating member 30, the connecting portion 353 and the second The second edge Ef2 including each edge of the piece 352 and included in the edge Ef of the connection member 35 face each other so as to intersect (that is, they are at twisted positions). ) has opposite portions Epo and Efo, and the corner portion 3211 (the end portion including the opposite portion Epo) of the terminating member 30 is opposed to the portion 3212 adjacent to the corner portion 3211 by the mating side (connecting portion) 353. It bends away from the part Efo.
  • the corner 3211 of the terminating member 30 is bent away from the facing portion Efo of the connecting portion (mating side) 353 with respect to the portion 3212 adjacent to the corner 3211, so that the connecting portion of the connecting member 35 R (curvature radius: see symbol R ⁇ in FIGS. 2 and 14) of the arc-shaped second edge Ef2 from 353 to the second piece portion 352 can be increased.
  • the value of the stress generated at the site ( size) can be reduced.
  • R of the second edge Ef2 in the power storage device 1 of the present embodiment is the radius of curvature when viewed from the X-axis direction, and the second edge Ef2 has a substantially arc shape when viewed from the X-axis direction. .
  • the terminating member main body 301 has an end portion 3211 including the facing portion Epo and a fixed portion F (including the adjacent portion 3212) to which the second piece portion 352 is fixed.
  • the end portion 3211 including the facing portion Epo and the fixed portion F are adjacent to each other (see FIG. 6). Specifically, when the height of the entire terminating member body 301 in the Z-axis direction is divided into three, the end portion 3211 and the fixed portion F are located on one side in the Z-axis direction (upper side in FIG. 6). They are placed next to each other in the range.
  • the end portion 3211 and the fixed portion F are arranged in the Y-axis direction on both one side and the other side in the Y-axis direction (left and right in FIG. 6). They are arranged adjacent to each other within a range of about one-sixth.
  • the edges Ep and Ef interfere with each other. Interference between the edges Ep and Ef of the termination member 30 and the connection member 35 can be suppressed at the positions (facing portions Epo and Efo) where a large force is likely to be generated in the case.
  • the power storage device of the present invention is not limited to the above-described embodiments, 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 corner portion (the end portion including the facing portion Epo) 3211 of the termination member 30 is bent away from the facing portion Efo of the connection member 35 with respect to the portion 3212 adjacent to the corner portion 3211 .
  • the end portion (connecting portion 353 and its peripheral portion) including the facing portion Efo of the connecting member 35 may be bent away from the facing portion Epo of the terminating member 30 with respect to the portion adjacent to the end portion.
  • a corner portion (an end portion including the facing portion Epo) 3211 of the connecting member 30 and the end portion including the facing portion Efo of the connecting member 35 may be curved away from each other.
  • the facing portions Epo and Efo in at least one of the terminal member 30 and the connecting portion 353 of the connecting member 35 are It has a configuration in which the included end portion is bent away from the opposing portions Epo and Efo on the other side with respect to the portion adjacent to the end portion, but it is not limited to this configuration.
  • Each of the other corners in the Z-axis direction of power storage device 1 may have the above configuration. That is, in the power storage device 1 , at least one of the one corner and the other corner in the Z-axis direction has a facing portion in at least one of the terminal member 30 and the connection portion 353 of the connection member 35 . It is sufficient that the end portions including Epo and Efo are bent away from the opposing portions Epo and Efo on the other side with respect to the portions adjacent to the end portions.
  • the first member 31 is not arranged in a region that overlaps the corner (the end including the facing portion Epo) 3211 of the second member 32 when viewed from the X-axis direction. (see FIG. 12) is not limited to this configuration.
  • the first member 31 is arranged in a region that overlaps a corner portion (end portion including the facing portion Epo) 3211 of the second member 32 when viewed from the X-axis direction.
  • a portion corresponding to the corner portion 3211 of the second member 32 (a portion overlapping when viewed from the X-axis direction) is bent away from the second member 32 (that is, is not in contact with the second member 32).
  • 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.
  • Battery cell 502 Battery laminate 503 End plate 504 Bind bar 505 Separator 506 Main body plate 507 Main fastening surface 508 First bent piece 509 Second bent piece 510... Third bent piece 511... Fourth bent piece C... Y-axis direction center of second member D... Laminated body Ef... Edge of connecting member Ef2... Second edge Efo... Opposing portion Ep... Edge of terminating member Ep1... First edge Epo... Opposing portion F... Fixed portion R... Flow path R ⁇ ... Radius of curvature ⁇ ... Gap

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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/JP2023/001440 2022-01-26 2023-01-19 蓄電装置 Ceased WO2023145586A1 (ja)

Priority Applications (3)

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US18/832,386 US20250183489A1 (en) 2022-01-26 2023-01-19 Energy storage apparatus
CN202380018835.7A CN118613954A (zh) 2022-01-26 2023-01-19 蓄电装置
JP2023576839A JPWO2023145586A1 (https=) 2022-01-26 2023-01-19

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
JP2020030915A (ja) * 2018-08-21 2020-02-27 株式会社Ｇｓユアサ 蓄電装置
JP2021064456A (ja) * 2019-10-10 2021-04-22 株式会社Ｇｓユアサ 蓄電装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
JP2020030915A (ja) * 2018-08-21 2020-02-27 株式会社Ｇｓユアサ 蓄電装置
JP2021064456A (ja) * 2019-10-10 2021-04-22 株式会社Ｇｓユアサ 蓄電装置

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CN118613954A (zh) 2024-09-06

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