WO2017183494A1 - 電池モジュール - Google Patents

電池モジュール Download PDF

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Publication number
WO2017183494A1
WO2017183494A1 PCT/JP2017/014610 JP2017014610W WO2017183494A1 WO 2017183494 A1 WO2017183494 A1 WO 2017183494A1 JP 2017014610 W JP2017014610 W JP 2017014610W WO 2017183494 A1 WO2017183494 A1 WO 2017183494A1
Authority
WO
WIPO (PCT)
Prior art keywords
bracket
array
end plate
fixing
fixing piece
Prior art date
Application number
PCT/JP2017/014610
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
守作直人
加藤崇行
植田浩生
石黒文彦
大石英史
Original Assignee
株式会社豊田自動織機
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社豊田自動織機 filed Critical 株式会社豊田自動織機
Publication of WO2017183494A1 publication Critical patent/WO2017183494A1/ja

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/271—Lids or covers for the racks or secondary casings
    • H01M50/273—Lids or covers for the racks or secondary casings characterised by the material
    • H01M50/278—Organic material
    • 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 battery module.
  • a battery module having an array of battery cells such as a lithium ion secondary battery is known.
  • a bracket may be used.
  • reinforcing brackets are fitted into a pair of side surfaces facing each other in the battery battery case.
  • Both the fixing piece of the reinforcing bracket and the support surface of the fixing member are provided with bolt through holes.
  • the fastening of the battery battery case and the fixing member can be achieved by passing fastening bolts through these bolt through holes. Has been made.
  • a predetermined restraining load is applied to the array of battery cells in the array direction. Also in the battery battery case of Patent Document 1 described above, a binding bolt is passed between the reinforcing brackets, and a binding load is applied to the battery battery case by fastening a nut to the tip of the connection bolt (see FIG. 1 of Patent Document 1). 4).
  • the total length in the arrangement direction of the battery module having such a configuration is affected by the protruding amount of the connecting bolt protruding from the bracket and the length of the bracket fixing piece (length in the arrangement direction).
  • the length of the connecting bolt needs to be set in consideration of an absorption margin that absorbs a dimensional tolerance of a battery cell or the like included in the array.
  • the dimension of the bracket fixing piece depends on the dimension of the bolt hole formed in the fixing piece.
  • the present invention has been made to solve the above problems, and an object of the present invention is to provide a battery module capable of suppressing the total length in the arrangement direction.
  • a battery module includes an array formed by arraying a plurality of battery cells, a first bracket disposed at one array end of the array, and a second array end of the array. And a connecting bolt and a nut for connecting the first bracket and the second bracket, and the first bracket and the second bracket are directed to the arrangement end face of the array.
  • an end plate provided with a connecting bolt insertion hole through which the connecting bolt is inserted, and a fixing bolt insertion hole through which the fixing bolt used for fixing to an external support body is inserted while projecting from the end plate in the arrangement direction.
  • the fixing bolt insertion hole of the fixing piece in the first bracket is a round hole, and the fixing bolt insertion hole of the fixing piece in the second bracket
  • the connection bolt is inserted into the connection bolt insertion hole of the second bracket from the connection bolt insertion hole of the first bracket and protrudes from the end plate of the second bracket.
  • a nut is fastened to the tip of the bolt.
  • a round hole is provided in the fixing piece of the first bracket on one side in the arrangement direction of the array, and a long hole is provided in the fixing piece of the second bracket on the other side.
  • the extension amount of the fixing piece protruding from the end plate is larger in the fixing piece of the second bracket provided with the long hole than in the fixing piece of the first bracket provided with the round hole.
  • the protruding amount of the connecting bolt protruding from the end plate of the second bracket may be less than the protruding amount of the fixing piece from the end plate of the second bracket. In this case, the total length of the battery modules in the arrangement direction can be further suppressed.
  • the array body has an elastic member at the other array end, the second bracket is provided with a rib connecting the end plate and the fixing piece, and the end plate of the second bracket is attached to the elastic member. You may contact
  • the second bracket may be provided with a plurality of ribs with a predetermined interval, and a gripping member for gripping a cable connected to the battery module may be provided between the ribs.
  • a gripping member for gripping a cable connected to the battery module may be provided between the ribs.
  • the space surrounded by the fixing piece of the second bracket and the rib can be effectively used as a cable gripping area.
  • the battery module includes an array formed by arranging a plurality of battery cells, a first bracket disposed at one array end of the array, and the other array end of the array. And a connection bolt and a nut for connecting the first bracket and the second bracket, and the first bracket and the second bracket are directed to the array end surface of the array body.
  • connection bolt insertion hole through which the connection bolt is inserted, and a fixing bolt insertion hole that extends from the end plate in the arrangement direction and through which a fixing bolt used for fixing to an external support is inserted
  • fixing bolt insertion hole of the fixing piece in the first bracket is a round hole
  • the fixing bolt of the fixing piece in the second bracket The through hole is a long hole extending in the arrangement direction
  • the connecting bolt has a head, a shaft, and a screw portion formed at the tip of the shaft, and the head is an end of the first bracket.
  • a nut is fastened to at least a part of the screw portion that is located on the plate side and protrudes from the end plate in the second bracket.
  • a round hole is provided in the fixing piece of the first bracket on one side in the arrangement direction of the array, and a long hole is provided in the fixing piece of the second bracket on the other side.
  • the extension amount of the fixing piece protruding from the end plate is larger in the fixing piece of the second bracket provided with the long hole than in the fixing piece of the first bracket provided with the round hole.
  • the battery module according to the present invention can suppress the total length in the arrangement direction.
  • FIG. 1 It is a perspective view which shows one Embodiment of a battery module. It is the schematic which shows the principal part of the battery module shown in FIG. It is the schematic which shows the principal part of the battery module which concerns on a comparative example. It is sectional drawing which shows the example of attachment of the holding member with respect to a 2nd bracket.
  • FIG. 1 is a perspective view showing an embodiment of a battery module.
  • the battery module 1 includes an array body 2 in which a plurality of battery cells 7 are arrayed, a first bracket 3 disposed at one array end of the array body 2, and an array body 2.
  • the second bracket 4 disposed at the other arrangement end, and a connecting bolt 5 and a nut 6 (see FIG. 2) for connecting the first bracket 3 and the second bracket 4 are configured. .
  • the battery cell 7 constituting the array 2 is a nonaqueous electrolyte secondary battery such as a lithium ion secondary battery.
  • the array body 2 is configured by arraying seven battery cells 7 and the elastic member P.
  • the heat transfer plate may be arranged adjacent to the battery cell 7.
  • the battery cell 7 includes, for example, an electrode assembly and an electrolytic solution in a hollow case having a substantially rectangular parallelepiped shape.
  • a pair of electrode terminals are provided apart from each other on the top surface of the case.
  • One of the electrode terminals is a positive electrode terminal connected to the positive electrode of the electrode assembly, and the other of the electrode terminals is a negative electrode terminal connected to the negative electrode of the electrode assembly.
  • the adjacent battery cells 7 and 7 are arranged so that the positive electrode terminal and the negative electrode terminal are adjacent to each other, and are connected in series by connecting the adjacent positive electrode terminal and the negative electrode terminal with a bus bar member. .
  • Each battery cell 7 is held by a cell holder 8 made of resin, for example.
  • the cell holder 8 has a frame that fits to the bottom and side surfaces of the case of the battery cell 7.
  • the wall portion addressed to the side surface of the case protrudes from the top surface of the case and defines an arrangement space for the cover 9 and the control device 10 described later.
  • the elastic member P is a member used for the purpose of preventing the battery cell 7, the first bracket 3, the second bracket 4, and the like from being damaged by a restraining load when the battery cell 7 is expanded.
  • the elastic member P is formed in a rectangular plate shape by a rubber sponge made of urethane, for example.
  • the elastic member P is disposed as the other array end of the array body 2. Examples of other forming materials of the elastic member P include ethylene propylene diene rubber (EPDM), chloroprene rubber, and silicon rubber. Further, the elastic member P is not limited to rubber, and may be a spring material or the like.
  • a resin cover 9 having a length substantially the same as the length in the arrangement direction of the array 2 is arranged.
  • the cover 9 has a function of electrically insulating the battery modules 1 and 1 when a plurality of battery modules 1 are stacked, and a function of preventing ejection of gas released from the battery cells 7 when an abnormality occurs.
  • a control device 10 that performs various controls related to the battery module 1 is placed on the cover 9. Although a cable used for communication with an external device is connected to the control device 10, illustration thereof is omitted. [Bracket configuration for array]
  • the first bracket 3 and the second bracket 4 have a function as a restraining member that applies a restraining load to the array body 2 in the array direction of the battery cells 7, and the battery module 1 as an external support body (of the housing). And a function as a fixing member for fixing to a wall or the like.
  • each of the first bracket 3 and the second bracket 4 are made of a rigid material such as metal. As shown in FIG. 2, each of the first bracket 3 and the second bracket 4 includes a rectangular end plate 11 having a dimension corresponding to the side surface in the arrangement direction in the case of the battery cell 7, and the end plate 11. It has a rectangular fixing piece 12 projecting at a substantially right angle from the edge, and is L-shaped as a whole.
  • the first bracket 3 is arranged so that the end plate 11 is addressed to the battery cell 7 constituting one arrangement end of the arrangement 2 and the fixing piece 12 is parallel to one side surface of the arrangement 2.
  • 2 is arranged at one end of the array.
  • the second bracket 4 is arranged so that the end plate 11 is addressed to the elastic member P constituting the other array end of the array body 2 and the fixing piece 12 is parallel to one side surface of the array body 2. Arranged at the other array end of the array 2.
  • the end plate 11 is provided with a connecting bolt insertion hole 13 through which the connecting bolt 5 is inserted.
  • two connecting bolt insertion holes 13 having a circular cross section are provided in two places on the upper edge side of the end plate 11, two places on the lower edge side, and a total of four places (see FIG. 1).
  • the fixing piece 12 is provided with a fixing bolt insertion hole 14 through which a fixing bolt (not shown) used for fixing to an external support is inserted.
  • four fixing bolt insertion holes 14 are provided at equal intervals.
  • the fixing bolt insertion holes 14A provided in the first bracket 3 are all round holes.
  • each of the fixing bolt insertion holes 14B provided in the second bracket 4 is a long hole.
  • the cross-sectional shape of the fixing bolt insertion hole 14B of the second bracket 4 extends along the extending direction of the fixing piece 12B.
  • the protruding amount W2 of the fixing piece 12B of the second bracket 4 from the end plate 11 is equal to the length of the fixing bolt insertion hole 14B from the end plate 11 because the fixing bolt insertion hole 14B is a long hole. It is larger than the overhang amount W1.
  • the fixing bolt is within the range of the length of the long hole on the basis of the position of the round hole. Therefore, the battery module 1 can be fixed to an external support while absorbing the dimensional tolerance of the array 2.
  • a rib 15 that connects the end plate 11 and the fixing piece 12 is provided between the fixing bolt insertion holes 14 and 14.
  • the rib 15 has a right triangle shape in plan view, and has a surface coupled to the end plate 11, a surface coupled to the fixing piece 12, and a slope connecting these surfaces.
  • the height of the rib 15B provided on the second bracket 4 (projection height from the end plate 11) H2 is the height of the rib 15A provided on the first bracket 3 (projection height from the end plate 11). ) It is higher than H1.
  • the first bracket 3 and the second bracket 4 are connected to each other by a connecting bolt 5 and a nut 6.
  • the connection bolt 5 includes a head portion 5a, a long shaft portion 5b, and a screw portion 5c formed at the tip of the shaft portion 5b.
  • the connection bolt 5 is inserted from the connection bolt insertion hole 13 of the first bracket 3 toward the connection bolt insertion hole 13 of the second bracket 4. That is, the head 5 a of the connecting bolt 5 is located on the end plate 11 side of the first bracket 3.
  • the threaded portion 5c of the connecting bolt 5 protrudes from the end plate 11 of the second bracket 4, and a nut 6 is fastened to at least a part of the protruding portion.
  • the protruding amount K of the screw portion 5c protruding from the end plate 11 of the second bracket 4 needs to be set to a length that can absorb the dimensional tolerance of each battery cell 7 included in the array 2.
  • the battery module 1 is configured such that, for example, after the first bracket 3 and the second bracket 4 are addressed to the array body 2, the connection bolt 5 is moved from the connection bolt insertion hole 13 of the first bracket 3 to the second bracket. 4 is inserted into the connecting bolt insertion hole 13, the nut 6 is fastened to the screw portion 5 c, and the elastic member P is compressed in the thickness direction. At this time, since the elastic member P is compressed by about 20% with respect to the initial thickness, the protrusion amount K of the screw portion 5c needs to be set to a sufficient length in consideration of the compression margin of the elastic member P. . [Function and effect]
  • FIG. 3 is a schematic view showing a main part of a battery module according to a comparative example. As shown in the figure, the battery module 100 according to the comparative example is different from the battery module 1 according to the present embodiment in the arrangement relationship between the first bracket 3 and the second bracket 4.
  • the first bracket 3 is configured such that the end plate 11 is addressed to the elastic member P constituting the other array end of the array body 2, and the fixing piece 12 is the array body 2. It is arrange
  • the second bracket 4 is arranged such that the end plate 11 is addressed to the battery cell 7 constituting one array end of the array body 2 and the fixing piece 12 is parallel to one side surface of the array body 2. Arranged at the other array end of the array 2.
  • the connecting bolt 5 is inserted from the connecting bolt insertion hole 13 of the second bracket 4 toward the connecting bolt insertion hole 13 of the first bracket 3 and protrudes from the end plate 11 of the first bracket 3.
  • a nut 6 is fastened to 5c.
  • the first bracket 3 is disposed on the distal end side (the screw portion 5c side) of the connecting bolt 5, and the second bracket 4 is It is arranged on the base end side (head 5 a side) of the connecting bolt 5.
  • the protruding amount W1 of the fixing piece 12A of the first bracket 3 in which the fixing bolt insertion hole 14A is a round hole is the extension amount W1 of the fixing piece 12B of the second bracket 4 in which the fixing bolt insertion hole 14B is a long hole. It is smaller than the amount W2. For this reason, the screw part 5c of the connecting bolt 5 protrudes from the end plate 11 of the first bracket 3 larger than the fixing piece 12A.
  • the screw portion 5 c of the connecting bolt 5 is protruded on the second bracket 4 side where the protruding amount of the fixing piece 12 is large. Yes.
  • the protrusion amount K of the screw portion 5c protruding from the end plate 11 of the second bracket 4 is greater than the overhang amount W2 of the fixing piece 12B from the end plate 11 in the second bracket 4.
  • the protruding amount K may be equal to the overhang amount W2, and is slightly larger than the overhang amount W2 in a range where the total length L of the battery module 1 does not exceed the total length L of the battery module 1 according to the comparative example. It may be.
  • the elastic member P is disposed as the other array end of the array body 2.
  • the first bracket 3 and the second bracket 4 are provided with a plurality of ribs 15 that connect the end plate 11 and the fixing piece 12.
  • the end plate 11 of the first bracket 3 is in contact with the battery cell 7, and the end plate 11 of the second bracket 4 is in contact with the elastic member P.
  • the load when the battery cell 7 expands tends to be locally applied to the end plate 11.
  • the load when the battery cell 7 expands tends to be applied to the end plate 11 as a whole.
  • the end plate 11 is likely to deform (fall down) as a fulcrum.
  • the extension amount W2 of the fixing piece 12B of the second bracket 4 is larger than the extension amount W1 of the fixing piece 12A of the first bracket 3, so that the end The height H2 of the rib 15B that connects the plate 11 and the fixing piece 12 can be sufficiently secured. Therefore, the end plate 11 on the second bracket 4 side is sufficiently reinforced by the ribs 15B, and deformation of the end plate 11 when the battery cell 7 expands can be suitably suppressed. Further, the threaded portion 5c of the connecting bolt 5 protruding from the end plate 11 of the second bracket 4 is inferior in strength to the shaft portion 5b having no thread groove, but the deformation of the end plate 11 on the second bracket 4 side. Is suppressed, the fold / chip of the threaded portion 5c of the connecting bolt 5 is also suppressed. [Modification]
  • the present invention is not limited to the above embodiment.
  • the number of battery cells 7 arranged in the array 2, the shape of the end plate 11 in the first bracket 3 and the second bracket 4, the shape of the rib 15, etc. can be appropriately changed according to the specifications of the battery module 1. is there.
  • a gripping member 16 that grips the cable C connected to the battery module 1 may be disposed between the ribs 15B and 15B.
  • the cable C is, for example, a cable that connects the control device 10 and an external device.
  • the gripping member 16 is, for example, a binding band.
  • the holding member 16 is fixed to the end plate 11 between the ribs 15B and 15B using, for example, an adhesive tape. According to such a configuration, the space surrounded by the fixing piece 12B of the second bracket 4 and the space between the ribs 15B and 15B can be effectively used as the gripping area of the cable C.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Battery Mounting, Suspending (AREA)
PCT/JP2017/014610 2016-04-20 2017-04-10 電池モジュール WO2017183494A1 (ja)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2016-084622 2016-04-20
JP2016084622A JP6620655B2 (ja) 2016-04-20 2016-04-20 電池モジュール

Publications (1)

Publication Number Publication Date
WO2017183494A1 true WO2017183494A1 (ja) 2017-10-26

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Application Number Title Priority Date Filing Date
PCT/JP2017/014610 WO2017183494A1 (ja) 2016-04-20 2017-04-10 電池モジュール

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JP (1) JP6620655B2 (enrdf_load_stackoverflow)
WO (1) WO2017183494A1 (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022181817A1 (ja) * 2021-02-26 2022-09-01 ビークルエナジージャパン株式会社 組電池及び電源装置

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2019106318A (ja) * 2017-12-13 2019-06-27 パナソニックＩｐマネジメント株式会社 組電池
JP7136762B2 (ja) * 2019-12-17 2022-09-13 本田技研工業株式会社 蓄電装置
JP6994677B2 (ja) * 2020-08-06 2022-01-14 パナソニックＩｐマネジメント株式会社 組電池

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015109176A (ja) * 2013-12-04 2015-06-11 株式会社豊田自動織機 電池モジュールユニット
JP2015153470A (ja) * 2014-02-10 2015-08-24 株式会社豊田自動織機 電池パック
JP2015213039A (ja) * 2014-05-07 2015-11-26 株式会社豊田自動織機 電池モジュール
JP2015225817A (ja) * 2014-05-29 2015-12-14 株式会社豊田自動織機 電池モジュール及び電池パック

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6379692B2 (ja) * 2014-06-03 2018-08-29 株式会社豊田自動織機 電池モジュール
JP6237479B2 (ja) * 2014-06-05 2017-11-29 株式会社豊田自動織機 電池モジュール及び電池パック
JP6379737B2 (ja) * 2014-06-27 2018-08-29 株式会社豊田自動織機 電池モジュール
JP6252781B2 (ja) * 2014-08-25 2017-12-27 株式会社豊田自動織機 電池モジュールの製造装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015109176A (ja) * 2013-12-04 2015-06-11 株式会社豊田自動織機 電池モジュールユニット
JP2015153470A (ja) * 2014-02-10 2015-08-24 株式会社豊田自動織機 電池パック
JP2015213039A (ja) * 2014-05-07 2015-11-26 株式会社豊田自動織機 電池モジュール
JP2015225817A (ja) * 2014-05-29 2015-12-14 株式会社豊田自動織機 電池モジュール及び電池パック

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022181817A1 (ja) * 2021-02-26 2022-09-01 ビークルエナジージャパン株式会社 組電池及び電源装置
JPWO2022181817A1 (enrdf_load_stackoverflow) * 2021-02-26 2022-09-01
JP7674465B2 (ja) 2021-02-26 2025-05-09 ビークルエナジージャパン株式会社 組電池及び電源装置

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JP2017195088A (ja) 2017-10-26

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