JP6561849B2 - Battery module - Google Patents

Battery module Download PDF

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JP6561849B2
JP6561849B2 JP2016002693A JP2016002693A JP6561849B2 JP 6561849 B2 JP6561849 B2 JP 6561849B2 JP 2016002693 A JP2016002693 A JP 2016002693A JP 2016002693 A JP2016002693 A JP 2016002693A JP 6561849 B2 JP6561849 B2 JP 6561849B2
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transfer plate
heat transfer
main body
battery
heat
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JP2017123309A (en
JP2017123309A5 (en
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和樹 前田
和樹 前田
加藤 崇行
崇行 加藤
浩生 植田
浩生 植田
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Toyota Industries Corp
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Priority to PCT/JP2016/084790 priority patent/WO2017119206A1/en
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/60Heating or cooling; Temperature control
    • H01M10/61Types of temperature control
    • H01M10/613Cooling or keeping cold
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/60Heating or cooling; Temperature control
    • H01M10/62Heating or cooling; Temperature control specially adapted for specific applications
    • H01M10/625Vehicles
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/60Heating or cooling; Temperature control
    • H01M10/64Heating or cooling; Temperature control characterised by the shape of the cells
    • H01M10/647Prismatic or flat cells, e.g. pouch cells
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/60Heating or cooling; Temperature control
    • H01M10/65Means for temperature control structurally associated with the cells
    • H01M10/651Means for temperature control structurally associated with the cells characterised by parameters specified by a numeric value or mathematical formula, e.g. ratios, sizes or concentrations
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/60Heating or cooling; Temperature control
    • H01M10/65Means for temperature control structurally associated with the cells
    • H01M10/653Means for temperature control structurally associated with the cells characterised by electrically insulating or thermally conductive materials
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/60Heating or cooling; Temperature control
    • H01M10/65Means for temperature control structurally associated with the cells
    • H01M10/655Solid structures for heat exchange or heat conduction
    • H01M10/6551Surfaces specially adapted for heat dissipation or radiation, e.g. fins or coatings
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/60Heating or cooling; Temperature control
    • H01M10/65Means for temperature control structurally associated with the cells
    • H01M10/655Solid structures for heat exchange or heat conduction
    • H01M10/6554Rods or plates
    • H01M10/6555Rods or plates arranged between the cells
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204Racks, modules or packs for multiple batteries or multiple cells
    • H01M50/207Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/209Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for prismatic or rectangular cells
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Algebra (AREA)
  • General Physics & Mathematics (AREA)
  • Mathematical Analysis (AREA)
  • Mathematical Optimization (AREA)
  • Pure & Applied Mathematics (AREA)
  • Secondary Cells (AREA)
  • Battery Mounting, Suspending (AREA)

Description

本発明は、電池モジュールに関する。   The present invention relates to a battery module.

電池ホルダに保持された状態の電池セルが複数配列されてなる電池モジュールが筐体等に取り付けられた電池パックが知られている。特許文献1には、電池ホルダに伝熱プレートを取り付け、当該伝熱プレートを熱伝導部材を介して筐体に接触させることにより放熱性を向上させることができる電池モジュールが開示されている。この電池モジュールは、複数配列された電池セルの配列方向端部に弾性部材が配置されており、複数の電池セル及び弾性部材は、配列方向に加圧された状態で一体的に拘束されている。   A battery pack in which a battery module in which a plurality of battery cells held in a battery holder are arranged is attached to a housing or the like is known. Patent Document 1 discloses a battery module that can improve heat dissipation by attaching a heat transfer plate to a battery holder and bringing the heat transfer plate into contact with a housing via a heat conductive member. In this battery module, an elastic member is disposed at an end in the arrangement direction of a plurality of battery cells arranged, and the plurality of battery cells and the elastic member are integrally restrained in a state of being pressed in the arrangement direction. .

特開2015−156303号公報JP 2015-156303 A

このような構成の電池モジュールは、電池セルの膨張を一定の範囲で吸収する弾性部材が配置されることにより、電池セルに接触するように設けられた伝熱プレートは一定の範囲で移動する。また、このような構成の電池モジュールは、熱伝導部材を押し付けた状態で筐体に固定されるので、接触する伝熱プレートによって押し付け方向に変形する。このため、伝熱プレートの移動先の部分に該当する熱伝導部材に上記のような変形がある場合、伝熱プレートは熱伝導部材に接触しなくなり、放熱効率が低下する。   In the battery module having such a configuration, an elastic member that absorbs the expansion of the battery cell in a certain range is arranged, so that the heat transfer plate provided in contact with the battery cell moves in a certain range. Moreover, since the battery module of such a structure is fixed to a housing | casing in the state which pressed the heat conductive member, it deform | transforms in the pressing direction with the heat-transfer plate which contacts. For this reason, when there exists a deformation | transformation as mentioned above in the heat conductive member applicable to the movement destination part of a heat-transfer plate, a heat-transfer plate will not contact a heat conductive member and heat dissipation efficiency will fall.

そこで、本発明の目的は、電池セルの膨張により電池セルの配列方向に伝熱プレートが移動した場合であっても、放熱効率の低下を抑制することができる電池モジュールを提供することにある。   Then, the objective of this invention is providing the battery module which can suppress the fall of heat dissipation efficiency, even if it is a case where a heat-transfer plate moves to the arrangement direction of a battery cell by expansion | swelling of a battery cell.

本発明の電池モジュールは、熱伝導部材を介して筐体に取り付けられる電池モジュールであって、一方向に配列される複数の電池セルと、電池セルの一方向に交差する面である主面に接触するように配置されて一方向に配列される複数の伝熱プレートと、を有する配列体と、配列体を一方向に加圧した状態で拘束する拘束部と、を備え、伝熱プレートは、主面に接触する第一本体部と、第一本体部の一端部から主面に交差する方向に折れ曲がり、熱伝導部材に接触する第二本体部と、を有し、第二本体部における一端部とは反対側の他端部と、第一本体部から第二本体部が折れ曲がる方向に隣接して配置されている伝熱プレートとが、電池セルの膨張により伝熱プレートが移動する前の状態において、電池セルの膨張による伝熱プレートの一方向における移動量に応じた距離離れている。 The battery module of the present invention is a battery module that is attached to a housing via a heat conducting member, and has a plurality of battery cells arranged in one direction and a main surface that intersects the battery cell in one direction. A plurality of heat transfer plates arranged so as to be in contact with each other and arranged in one direction; and a restraining portion that restrains the array in a state of being pressed in one direction. A first main body portion that contacts the main surface, and a second main body portion that bends in a direction intersecting the main surface from one end of the first main body portion, and contacts the heat conducting member. Before the heat transfer plate moves due to the expansion of the battery cell , the other end opposite to the one end and the heat transfer plate disposed adjacent to the first main body in the direction in which the second main body is bent. in the state, one heat transfer plate according to the expansion of the battery cells Apart a distance corresponding to the movement amount in the direction.

この構成の電池モジュールでは、第二本体部における第一本体部とは反対側の端部と、第一本体部から第二本体部が折れ曲がる方向に隣接して配置されている伝熱プレートとが離間している。更に、離間距離は、電池セルの膨張による伝熱プレートの一方向における移動量に応じた距離となっている。上記離間距離を調整することは、電池セルの膨張により一の伝熱プレートが移動した場合の、当該一の伝熱プレートと、当該伝熱プレートの移動方向に隣接する他の伝熱プレートの押圧によって変形された熱伝導部材との移動方向における重なり部分の長さを調整することを意味する。当該重なり部分は、一の伝熱プレートが熱伝導部材と接触しなくなる部分となり得るので、当該重なり量(すなわち、離間距離)が適宜調整された伝熱プレートを有する電池モジュールでは、放熱効率の低下を抑制することができる。   In the battery module having this configuration, the end portion of the second main body portion opposite to the first main body portion and the heat transfer plate disposed adjacent to the first main body portion in the direction in which the second main body portion bends are provided. It is separated. Furthermore, the separation distance is a distance corresponding to the amount of movement in one direction of the heat transfer plate due to the expansion of the battery cells. The adjustment of the separation distance means that when one heat transfer plate moves due to the expansion of the battery cell, the one heat transfer plate and another heat transfer plate adjacent to the heat transfer plate in the moving direction are pressed. This means that the length of the overlapping portion in the moving direction with the heat conducting member deformed by the above is adjusted. Since the overlapping portion can be a portion where one heat transfer plate does not come into contact with the heat conducting member, in a battery module having a heat transfer plate in which the overlapping amount (that is, the separation distance) is appropriately adjusted, the heat dissipation efficiency is reduced. Can be suppressed.

本発明の電池モジュールでは、一方向における第二本体部の長さを、一方向における第一本体部の厚みの1倍以上10倍以下としてもよい。   In the battery module of the present invention, the length of the second body portion in one direction may be 1 to 10 times the thickness of the first body portion in one direction.

本発明の電池モジュールでは、上記距離は、電池セルの膨張による伝熱プレートの最大移動量よりも長くてもよい。   In the battery module of the present invention, the distance may be longer than the maximum amount of movement of the heat transfer plate due to expansion of the battery cells.

この構成の電池モジュールによれば、電池セルの膨張により伝熱プレートが移動した場合であっても、第二本体部の他端部が移動方向に隣接して配置されている伝熱プレートが配置されていた位置まで移動することはない。言い換えれば、電池セルの膨張により伝熱プレートが移動した場合であっても、移動方向に隣接して配置されていた伝熱プレートの押圧によって変形した熱伝導部材の位置にまで移動することはない。したがって、第二本体部の一部が熱伝導部材に接触しなくなることがなく、第二本体部の全てが熱伝導部材に接触する状態を維持することができる。この結果、放熱効率の低下をより一層抑制することができる。   According to the battery module of this configuration, even when the heat transfer plate moves due to the expansion of the battery cell, the heat transfer plate in which the other end of the second main body is arranged adjacent to the moving direction is arranged. It does not move to the position where it was done. In other words, even if the heat transfer plate moves due to the expansion of the battery cell, it does not move to the position of the heat conducting member deformed by the pressure of the heat transfer plate arranged adjacent to the moving direction. . Accordingly, a part of the second main body portion does not come into contact with the heat conducting member, and a state in which all of the second main body portion comes into contact with the heat conducting member can be maintained. As a result, it is possible to further suppress a decrease in heat dissipation efficiency.

本発明の電池モジュールは、配列体の一方の端部に配置される弾性部材を更に備えており、拘束部は、配列体と弾性部材とを一方向に加圧した状態で拘束してもよい。   The battery module of the present invention may further include an elastic member disposed at one end of the array body, and the restraining section may restrain the array body and the elastic member in a state where the array body and the elastic member are pressed in one direction. .

この構成の電池モジュールでは、電池セルの膨張を一定の範囲で吸収することができる。   In the battery module having this configuration, the expansion of the battery cell can be absorbed within a certain range.

本発明の電池モジュールでは、一方向における第二本体部の長さを、一方向において弾性部材から遠い位置に配置されている電池セルに接触する伝熱プレートほど長くしてもよい。   In the battery module of the present invention, the length of the second main body portion in one direction may be made longer as the heat transfer plate is in contact with the battery cell arranged at a position far from the elastic member in one direction.

この構成の電池モジュールでは、電池セルの膨張により移動量が大きい伝熱プレートほど(すなわち、弾性部材に近い伝熱プレートほど)第二本体部の移動方向における長さが短くなっているのでいる。これにより、電池セルの膨張により伝熱プレートが移動した場合であっても、移動方向に隣接して配置されていた伝熱プレートの押圧によって変形した熱伝導部材の位置にまで移動する可能性を低くすることができる。この結果、放熱効率の低下をより一層抑制することができる。   In the battery module having this configuration, the heat transfer plate having a larger movement amount due to the expansion of the battery cell (that is, the heat transfer plate closer to the elastic member) has a shorter length in the moving direction of the second main body portion. Thereby, even when the heat transfer plate moves due to the expansion of the battery cell, there is a possibility of moving to the position of the heat conducting member deformed by the pressure of the heat transfer plate arranged adjacent to the moving direction. Can be lowered. As a result, it is possible to further suppress a decrease in heat dissipation efficiency.

本発明によれば、電池セルの膨張により電池セルの配列方向に伝熱プレートが移動した場合であっても、放熱効率の低下を抑制することができる。   ADVANTAGE OF THE INVENTION According to this invention, even if it is a case where a heat exchanger plate moves to the sequence direction of a battery cell by expansion | swelling of a battery cell, the fall of heat dissipation efficiency can be suppressed.

一実施形態における電池モジュールを含む電池パックを示す斜視図である。It is a perspective view which shows the battery pack containing the battery module in one Embodiment. 一実施形態における電池モジュールを示す側面図である。It is a side view which shows the battery module in one Embodiment. 図2の電池セル、電池ホルダ及び伝熱プレートを示す分解斜視図である。It is a disassembled perspective view which shows the battery cell of FIG. 2, a battery holder, and a heat-transfer plate. 図2の電池セル、電池ホルダ及び伝熱プレートの配列状態を示す側面図である。It is a side view which shows the arrangement | sequence state of the battery cell of FIG. 2, a battery holder, and a heat-transfer plate. (A)は一の電池セル、電池ホルダ及び伝熱プレートを示した側面図であり、(B)は伝熱プレートの曲線部を拡大して示した側面図である。(A) is the side view which showed one battery cell, the battery holder, and the heat-transfer plate, (B) is the side view which expanded and showed the curved part of the heat-transfer plate. 熱伝導部材が配置された側壁に取り付けられる図2の電池モジュールを示した側面図である。It is the side view which showed the battery module of FIG. 2 attached to the side wall by which the heat conductive member is arrange | positioned. 図2の電池モジュールが、熱伝導部材が配置された側壁に取り付けられた状態を示す側面図である。It is a side view which shows the state in which the battery module of FIG. 2 was attached to the side wall by which the heat conductive member is arrange | positioned. (A)は電池セルの膨張により伝熱プレートが移動する前の状態を示す側面図であり、(B)は電池セルの膨張により伝熱プレートが移動した後の状態を示す側面図である。(A) is a side view which shows the state before a heat transfer plate moves by expansion | swelling of a battery cell, (B) is a side view which shows the state after a heat transfer plate moved by expansion | swelling of a battery cell. (A)図2の電池モジュールに含まれる弾性部材近傍を拡大して示した側面図であり、(B)変形例に係る電池モジュールに含まれる弾性部材近傍を拡大して示した側面図である。(A) It is the side view which expanded and showed the elastic member vicinity contained in the battery module of FIG. 2, (B) The side view which expanded and showed the elastic member vicinity contained in the battery module which concerns on a modification. .

以下、図面を参照して一実施形態に係る電池モジュール21を含む電池パック10について説明する。図面の説明において、同一要素には同一符号を付し、重複する説明を省略する。図面の寸法比率は、説明のものと必ずしも一致していない。   Hereinafter, a battery pack 10 including a battery module 21 according to an embodiment will be described with reference to the drawings. In the description of the drawings, the same elements are denoted by the same reference numerals, and redundant description is omitted. The dimensional ratios in the drawings do not necessarily match those described.

図1に示されるように、電池パック10は、筐体11を有している。筐体11には複数の電池モジュール21が収容されている。筐体11は、四角箱状をなしており、矩形平板状の底板12と、底板12の周縁から立設する矩形平板状の側壁13と、側壁13によって囲まれる開口部を閉塞する矩形平板状の天板14と、を有している。   As shown in FIG. 1, the battery pack 10 has a housing 11. A plurality of battery modules 21 are accommodated in the housing 11. The casing 11 has a rectangular box shape, a rectangular flat plate-like bottom plate 12, a rectangular flat plate-like side wall 13 standing from the periphery of the bottom plate 12, and a rectangular flat plate shape that closes an opening surrounded by the side wall 13. The top plate 14 is provided.

図2に示されるように、電池モジュール21は、複数の電池セル23(図1参照)と、一対のブラケット(拘束部)25,25と、弾性部材47と、ボルトB及びナットNと、伝熱プレート41と、を備えている。   As shown in FIG. 2, the battery module 21 includes a plurality of battery cells 23 (see FIG. 1), a pair of brackets (restraining portions) 25 and 25, an elastic member 47, bolts B and nuts N, and transmission. And a heat plate 41.

電池セル23は、例えば、リチウムイオン二次電池及びニッケル水素蓄電池などの二次電池である。電池セル23は、電池ホルダ22に保持された状態で一方向Dに並設されている。図3に示されるように、電池ホルダ22は、第一被覆部31と、第二被覆部32と、第三被覆部33と、第四被覆部34と、一対の脚部36,36と、を有している。   The battery cell 23 is a secondary battery such as a lithium ion secondary battery or a nickel hydride storage battery. The battery cells 23 are juxtaposed in one direction D while being held by the battery holder 22. As shown in FIG. 3, the battery holder 22 includes a first covering portion 31, a second covering portion 32, a third covering portion 33, a fourth covering portion 34, a pair of leg portions 36 and 36, have.

第一被覆部31は、矩形平板状に形成され、電池セル23の底部24aを覆う部分である。第二被覆部32及び第三被覆部33は、第一被覆部31の長手方向両端から立設する部分である。第二被覆部32及び第三被覆部33は、矩形平板状に形成され、電池セル23の側面24bを覆う。第四被覆部34は、矩形平板状に形成され、電池セル23の一方の主面(厚み方向に直交する面)24cの一部を覆う部分である。第四被覆部34は、第二被覆部32の長手方向における第一端部32a(第一被覆部31が設けられる端部とは反対側の端部)と、第三被覆部33の長手方向における第一端部33a(第一被覆部31が設けられる端部とは反対側の端部)とに接続されている。第四被覆部34は、その厚み方向が電池セル23の並設方向と一致し、長手方向が第二被覆部32及び第三被覆部33の対向方向と一致するように配置されている。第一被覆部31、第二被覆部32、第三被覆部33に囲まれる領域は、電池セル23が収容される収容部Sとなる。   The first covering portion 31 is a portion that is formed in a rectangular flat plate shape and covers the bottom 24 a of the battery cell 23. The second covering portion 32 and the third covering portion 33 are portions erected from both longitudinal ends of the first covering portion 31. The second covering portion 32 and the third covering portion 33 are formed in a rectangular flat plate shape and cover the side surface 24 b of the battery cell 23. The fourth covering portion 34 is a portion that is formed in a rectangular flat plate shape and covers a part of one main surface (surface orthogonal to the thickness direction) 24 c of the battery cell 23. The fourth covering portion 34 includes a first end portion 32 a (an end portion opposite to the end portion on which the first covering portion 31 is provided) in the longitudinal direction of the second covering portion 32 and a longitudinal direction of the third covering portion 33. Is connected to the first end 33a (the end opposite to the end where the first covering portion 31 is provided). The fourth covering portion 34 is arranged such that the thickness direction thereof coincides with the juxtaposed direction of the battery cells 23 and the longitudinal direction thereof coincides with the opposing direction of the second covering portion 32 and the third covering portion 33. A region surrounded by the first covering portion 31, the second covering portion 32, and the third covering portion 33 is a housing portion S in which the battery cell 23 is housed.

第二被覆部32及び第三被覆部33の長手方向における第一端部32a,33aには、それぞれ第二被覆部32及び第三被覆部33と連設され、第二被覆部32及び第三被覆部33の長手方向に延びる矩形平板状の突出部35が設けられている。また、第二被覆部32及び第三被覆部33の長手方向における第二端部32c、33cには、それぞれ四角柱状の脚部36,36が設けられている。   The first end portions 32a and 33a in the longitudinal direction of the second covering portion 32 and the third covering portion 33 are connected to the second covering portion 32 and the third covering portion 33, respectively. A rectangular flat plate-like projecting portion 35 extending in the longitudinal direction of the covering portion 33 is provided. In addition, square columnar leg portions 36 and 36 are provided at second end portions 32 c and 33 c in the longitudinal direction of the second covering portion 32 and the third covering portion 33, respectively.

図1に示されるように、一対のブラケット25,25は、一方向Dに並設された電池セル23の並設方向両端に設けられている。ブラケット25は、挟持部25aと、固定部25bと、固定部25bに形成された挿通孔25cと、を有している。電池モジュール21は、ブラケット25の固定部25bが側壁13に固定されることによって、筐体11に固定される。具体的には、挿通孔25cに挿通されるボルト(図示せず)が側壁13にねじ込まれることにより、ブラケット25が筐体11に固定される。   As shown in FIG. 1, the pair of brackets 25, 25 are provided at both ends of the battery cells 23 arranged in parallel in one direction D. The bracket 25 has a clamping part 25a, a fixing part 25b, and an insertion hole 25c formed in the fixing part 25b. The battery module 21 is fixed to the housing 11 by fixing the fixing portion 25 b of the bracket 25 to the side wall 13. Specifically, the bracket 25 is fixed to the housing 11 by a bolt (not shown) inserted through the insertion hole 25 c being screwed into the side wall 13.

図2に示されるように、弾性部材47は、配列体28の一方の端部に配置されている。配列体28及び弾性部材47は、後段にて詳述するボルトB及びナットNによって、電池セル23の配列方向(一方向D)に加圧した状態で拘束される。弾性部材47は、例えばウレタン系ゴム等の弾性材料によって形成されている。弾性部材47は、電池セル23の膨張を一定の範囲で吸収する。   As shown in FIG. 2, the elastic member 47 is disposed at one end of the array 28. The array body 28 and the elastic member 47 are restrained in a state where they are pressed in the array direction (one direction D) of the battery cells 23 by bolts B and nuts N described in detail later. The elastic member 47 is made of an elastic material such as urethane rubber. The elastic member 47 absorbs the expansion of the battery cell 23 within a certain range.

図2に示されるように、ボルトB及びナットNは、一対のブラケット25,25同士を連結する。一対のブラケット25,25には、ボルトBが挿通されている。ボルトBは、一方のブラケット25から、他方のブラケット25に向けて挿通されると共に、他方のブラケット25を挿通した位置でナットNに螺合されている。一対のブラケット25,25は、一方向Dに配列される複数の電池セル23と、電池セル23の一方向D(配列の方向)に交差する面である主面24cに接触するように配置される複数の伝熱プレート41と、からなる配列体28及び弾性部材47を一方向Dに加圧した状態で拘束する。   As shown in FIG. 2, the bolt B and the nut N connect the pair of brackets 25, 25 to each other. Bolts B are inserted through the pair of brackets 25, 25. The bolt B is inserted from one bracket 25 toward the other bracket 25 and is screwed into the nut N at a position where the other bracket 25 is inserted. The pair of brackets 25, 25 are arranged so as to contact a plurality of battery cells 23 arranged in one direction D and a main surface 24 c that is a surface intersecting one direction D (array direction) of the battery cells 23. The plurality of heat transfer plates 41 and the array body 28 and the elastic member 47 are restrained in a state of being pressed in one direction D.

図3及び図4に示されるように、伝熱プレート41は、電池ホルダ22に収容された電池セル23の主面24cに接触して配置される板状の部材である。図5(A)に示されるように、伝熱プレート41は、例えば、アルミニウムの金属製の板材を屈曲させることで形成されており、矩形平板状の第一本体部42と、第一本体部42の長手方向における一端部43bから直角(90度)に屈曲する矩形平板状の第二本体部43とを有している。第一本体部42は、電池セル23の厚み方向において電池セル23と隣り合った状態で収容部Sに設けられる。第二本体部43は、第三被覆部33の一方の側面24b(第三被覆部33の厚み方向の面において収容部Sとは反対側の面)を覆っている。   As shown in FIGS. 3 and 4, the heat transfer plate 41 is a plate-like member disposed in contact with the main surface 24 c of the battery cell 23 accommodated in the battery holder 22. As shown in FIG. 5A, the heat transfer plate 41 is formed by, for example, bending a metal plate made of aluminum, and includes a rectangular flat plate-like first main body portion 42 and a first main body portion. And a rectangular flat plate-like second main body portion 43 bent at a right angle (90 degrees) from one end portion 43b in the longitudinal direction. The first main body portion 42 is provided in the accommodating portion S in a state adjacent to the battery cell 23 in the thickness direction of the battery cell 23. The second main body portion 43 covers one side surface 24 b of the third covering portion 33 (the surface on the opposite side of the housing portion S in the thickness direction surface of the third covering portion 33).

第二本体部43は、第一本体部42から90度曲げられている。言い換えれば、第一本体部42と第二本体部43とは、90度で交差している。第二本体部43は、第一本体部42から弾性部材47が配置された方向に折れ曲がっている。図4に示されるように、電池モジュール21は、第二本体部43における一端部43bとは反対側の他端部43aと、第一本体部42から第二本体部43が折れ曲がる方向に隣接して配置されている伝熱プレート41とが距離G離れている。本実施形態の距離Gは、電池セル23の膨張により一方向Dに移動する伝熱プレート41の移動量に応じた距離であり、電池セル23の膨張により移動する伝熱プレート41の最大移動量よりも長い。図5(B)に示されるように、一方向Dにおける第二本体部43の長さL2は、一方向Dにおける第一本体部42の厚みL1の1倍以上10倍以下(通常、5倍)である。   The second main body 43 is bent 90 degrees from the first main body 42. In other words, the first main body portion 42 and the second main body portion 43 intersect at 90 degrees. The second main body 43 is bent from the first main body 42 in the direction in which the elastic member 47 is disposed. As shown in FIG. 4, the battery module 21 is adjacent to the other end portion 43 a of the second main body portion 43 opposite to the one end portion 43 b and the direction in which the second main body portion 43 is bent from the first main body portion 42. And a heat transfer plate 41 arranged in a distance G. The distance G of the present embodiment is a distance corresponding to the amount of movement of the heat transfer plate 41 that moves in one direction D due to the expansion of the battery cell 23, and the maximum amount of movement of the heat transfer plate 41 that moves due to the expansion of the battery cell 23. Longer than. As shown in FIG. 5B, the length L2 of the second main body 43 in one direction D is 1 to 10 times the thickness L1 of the first main body 42 in one direction D (usually 5 times). ).

具体的には、図4に示されるように、配列体28の一端側から電池セル23A、電池セル23B、電池セル23、電池セル23D、電池セル23E、電池セル23F、及び電池セル23Gの順番で配置されている。電池セル23Gの主面24cに接触する伝熱プレート41Gの第二本体部43における他端部43aと、第一本体部42から第二本体部43が折れ曲がる方向に隣接して配置されている伝熱プレート41Fとが距離G離れている。同様に、電池セル23Fの主面24cに接触する伝熱プレート41Fの第二本体部43における他端部43a及び伝熱プレート41Eの離間距離、電池セル23Eの主面24cに接触する伝熱プレート41Eの第二本体部43における他端部43a及び伝熱プレート41Dの離間距離、電池セル23Dの主面24cに接触する伝熱プレート41Dの第二本体部43における他端部43a及び伝熱プレート41Cの離間距離、電池セル23Cの主面24cに接触する伝熱プレート41Cの第二本体部43における他端部43a及び伝熱プレート41Bの離間距離、並びに電池セル23Bの主面24cに接触する伝熱プレート41Bの第二本体部43における他端部43a及び伝熱プレート41Aの離間距離は、全て距離Gである。   Specifically, as shown in FIG. 4, the battery cell 23A, the battery cell 23B, the battery cell 23, the battery cell 23D, the battery cell 23E, the battery cell 23F, and the battery cell 23G are arranged in this order from one end side of the array 28. Is arranged in. The other end portion 43a of the second body portion 43 of the heat transfer plate 41G that contacts the main surface 24c of the battery cell 23G, and the heat transfer disposed adjacent to the first body portion 42 in the direction in which the second body portion 43 is bent. The heat plate 41F is separated by a distance G. Similarly, the distance between the other end 43a of the second main body 43 of the heat transfer plate 41F that contacts the main surface 24c of the battery cell 23F and the heat transfer plate 41E, the heat transfer plate that contacts the main surface 24c of the battery cell 23E. The other end 43a and the heat transfer plate in the second main body 43 of the heat transfer plate 41D contacting the main surface 24c of the battery cell 23D, the separation distance between the other end 43a and the heat transfer plate 41D in the second main body 43 of 41E. The distance between 41C, the distance between the other end 43a and the heat transfer plate 41B of the second body 43 of the heat transfer plate 41C that contacts the main surface 24c of the battery cell 23C, and the main surface 24c of the battery cell 23B. The separation distance between the other end 43a of the second main body 43 of the heat transfer plate 41B and the heat transfer plate 41A is the distance G.

図5(B)に示されるように、第二本体部43の第一本体部42側は、曲線部44が形成されている。曲線部44は、例えば、伝熱プレート41の厚みが3mmの場合、外側部分44aの曲線の半径を6mm、内側部分44bの曲線の半径を3mmとすることができる。曲線部44の一部は、後述する熱伝導部材51に接触する。なお、曲線部44における曲線の半径は極力小さくすることが好ましい。   As shown in FIG. 5B, a curved portion 44 is formed on the first body portion 42 side of the second body portion 43. For example, when the thickness of the heat transfer plate 41 is 3 mm, the curved portion 44 can have a curved radius of the outer portion 44a of 6 mm and a curved radius of the inner portion 44b of 3 mm. A part of the curved portion 44 is in contact with a heat conducting member 51 described later. The radius of the curve in the curve portion 44 is preferably as small as possible.

上述した構成の電池モジュール21が筐体11の側壁13に取り付けられて、図1に示されるような電池パック10となる。図6及び図7に示されるように、電池モジュール21が筐体11の側壁13に取り付けられる場合には、一対のブラケット25,25によって取り付けられる。また、配列体28と側壁13との間には、熱伝導部材51としてのTIM(Thermal Interface Material)が配置される。すなわち、伝熱プレート41の第二本体部43は、TIMを介して筐体11の側壁13に接触している。   The battery module 21 having the above-described configuration is attached to the side wall 13 of the housing 11 to form the battery pack 10 as shown in FIG. As shown in FIGS. 6 and 7, when the battery module 21 is attached to the side wall 13 of the housing 11, it is attached by a pair of brackets 25, 25. Further, a TIM (Thermal Interface Material) as the heat conducting member 51 is disposed between the array 28 and the side wall 13. That is, the 2nd main-body part 43 of the heat-transfer plate 41 is contacting the side wall 13 of the housing | casing 11 via TIM.

熱伝導部材51は、両面が粘着性を有するシート状の材料からなる部材である。また、この熱伝導部材51は、絶縁性を有している。このような絶縁性を有する熱伝導部材として、金属フィラーを含まない熱伝導シートを用いることができる。また、このような熱伝導部材51には、シリコーン系の熱伝導シートと、アクリル系の熱伝導シートとがある。シリコーン系の熱伝導シートを用いる場合には、耐寒性及び耐熱性に優れているため使用温度の範囲を広くすることができる。また、金属フィラーを使用していないシリコーン系の熱伝導シートは、温度及び周波数による電気特性の変化が小さいため絶縁材料に適する。一方、アクリル系のシートは、シロキサンガスの発生がないため、密閉空間における機械接点の接点障害、及び磨耗が発生しない。また、アクリル系のシートは、一般的にシリコーンより安価である。   The heat conducting member 51 is a member made of a sheet-like material whose both surfaces are adhesive. The heat conducting member 51 has insulating properties. As the heat conductive member having such an insulating property, a heat conductive sheet not including a metal filler can be used. In addition, the heat conductive member 51 includes a silicone heat conductive sheet and an acrylic heat conductive sheet. When a silicone-based heat conductive sheet is used, the range of operating temperature can be widened because of excellent cold resistance and heat resistance. In addition, a silicone-based heat conductive sheet that does not use a metal filler is suitable for an insulating material because the change in electrical characteristics due to temperature and frequency is small. On the other hand, since the acryl-based sheet does not generate siloxane gas, the contact failure of the mechanical contact and the abrasion do not occur in the sealed space. Acrylic sheets are generally less expensive than silicone.

次に、上記実施形態の電池モジュール21の作用効果について説明する。上記実施形態の電池モジュール21では、図4に示されるように、第二本体部43における他端部43aと、第一本体部42から第二本体部43が折れ曲がる方向に隣接して配置されている伝熱プレート41とが離間している。例えば、図8(A)に示されるように、伝熱プレート41Gの第二本体部43における他端部43aと、伝熱プレート41Gの第一本体部42から第二本体部43が折れ曲がる方向に隣接して配置されている伝熱プレート41Fとが離間している。また、伝熱プレート41Fの第二本体部43における他端部43aと、伝熱プレート41Fの第一本体部42から第二本体部43が折れ曲がる方向に隣接して配置されている伝熱プレート41Eとが離間している。   Next, the effect of the battery module 21 of the said embodiment is demonstrated. In the battery module 21 of the above embodiment, as shown in FIG. 4, the other end portion 43 a of the second main body portion 43 and the second main body portion 43 are disposed adjacent to each other in a direction in which the second main body portion 43 is bent. The heat transfer plate 41 is separated. For example, as shown in FIG. 8A, in the direction in which the second main body 43 is bent from the other end 43a of the second main body 43 of the heat transfer plate 41G and the first main body 42 of the heat transfer plate 41G. The heat transfer plates 41F arranged adjacent to each other are separated from each other. Moreover, the heat transfer plate 41E arrange | positioned adjacent to the other end part 43a in the 2nd main-body part 43 of the heat-transfer plate 41F, and the direction in which the 2nd main-body part 43 bends from the 1st main-body part 42 of the heat-transfer plate 41F. Are separated from each other.

更に、離間距離は、電池セルの膨張による伝熱プレートの一方向における移動量に応じた距離となっている。上記離間距離Gを調整することは、電池セル23の膨張により一の伝熱プレート41(例えば、伝熱プレート41G)が移動した場合の、当該一の伝熱プレート41と、当該伝熱プレート41の一方向(移動方向)Dに隣接する他の伝熱プレート41(例えば、伝熱プレート41F)の押圧によって変形された熱伝導部材51との一方向Dにおける重なり部分の長さを調整することを意味する。当該重なり部分は、一の伝熱プレートが熱伝導部材と接触しなくなる部分となり得るので、当該重なり量(すなわち、離間距離G)が適宜調整された伝熱プレート41を有する電池モジュール21では、放熱効率の低下を抑制することができる。   Furthermore, the separation distance is a distance corresponding to the amount of movement in one direction of the heat transfer plate due to the expansion of the battery cells. The adjustment of the separation distance G means that the one heat transfer plate 41 and the heat transfer plate 41 when the one heat transfer plate 41 (for example, the heat transfer plate 41G) moves due to the expansion of the battery cell 23. Adjusting the length of the overlapping portion in one direction D with the heat conducting member 51 deformed by pressing of another heat transfer plate 41 (for example, heat transfer plate 41F) adjacent to one direction (movement direction) D Means. The overlapping portion can be a portion where one heat transfer plate does not come into contact with the heat conducting member. Therefore, in the battery module 21 having the heat transfer plate 41 in which the overlapping amount (that is, the separation distance G) is appropriately adjusted, heat dissipation. A decrease in efficiency can be suppressed.

図8(B)に示されるように、上記実施形態の電池モジュール21では、離間距離Gは、電池セル23の膨張による伝熱プレート41の最大移動量Mよりも長い。この構成の電池モジュール21によれば、電池セル23の膨張により、図8(A)に示されるような位置から図8(B)に示されるように位置に伝熱プレート41が移動した場合であっても、第二本体部43の他端部43aが移動方向に隣接して配置されている伝熱プレート41が配置されていた位置H1,H2まで移動することはない。   As shown in FIG. 8B, in the battery module 21 of the above embodiment, the separation distance G is longer than the maximum movement amount M of the heat transfer plate 41 due to the expansion of the battery cells 23. According to the battery module 21 having this configuration, the expansion of the battery cell 23 causes the heat transfer plate 41 to move from the position shown in FIG. 8A to the position shown in FIG. 8B. Even if it exists, the other end part 43a of the 2nd main-body part 43 does not move to the position H1, H2 in which the heat-transfer plate 41 arrange | positioned adjacent to the moving direction was arrange | positioned.

具体的には、電池セル23の膨張により伝熱プレート41Gが移動した場合であっても、移動方向に隣接して配置されていた伝熱プレート41Fの押圧によって変形した熱伝導部材51の位置H1にまで移動することはない。すなわち、伝熱プレート41Gの第二本体部43と熱伝導部材51との接触した状態が維持される。同様に、電池セル23の膨張により伝熱プレート41Fが移動した場合であっても、移動方向に隣接して配置されていた伝熱プレート41Eの押圧によって変形した熱伝導部材51の位置H2にまで移動することはない。したがって、第二本体部43の一部が熱伝導部材51に接触しなくなることがない。この結果、放熱効率の低下をより一層抑制することができる。   Specifically, even when the heat transfer plate 41G moves due to the expansion of the battery cell 23, the position H1 of the heat conducting member 51 deformed by pressing of the heat transfer plate 41F arranged adjacent to the moving direction. Never move up to. That is, the state where the second main body 43 of the heat transfer plate 41G and the heat conducting member 51 are in contact with each other is maintained. Similarly, even when the heat transfer plate 41F moves due to the expansion of the battery cell 23, the heat transfer member 51 is deformed by the pressing of the heat transfer plate 41E arranged adjacent to the moving direction to the position H2 of the heat transfer member 51. Never move. Therefore, a part of the second main body 43 does not come into contact with the heat conducting member 51. As a result, it is possible to further suppress a decrease in heat dissipation efficiency.

上記実施形態の電池モジュール21は、配列体28の一方の端部に配置される弾性部材47を更に備えており、一対のブラケット25,25は、配列体28と弾性部材47とを一方向Dに加圧した状態で拘束している。この構成の電池モジュール21では、電池セル23の膨張を一定の範囲で吸収することができる。   The battery module 21 of the above embodiment further includes an elastic member 47 disposed at one end of the array 28, and the pair of brackets 25 and 25 connect the array 28 and the elastic member 47 in one direction D. It restrains in the state pressurized. In the battery module 21 having this configuration, the expansion of the battery cell 23 can be absorbed within a certain range.

以上、一実施形態について説明したが、本発明は、上記実施形態に限られるものではなく、発明の趣旨を逸脱しない範囲で種々の変更が可能である。   Although one embodiment has been described above, the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the invention.

上記実施形態では、第一本体部42の一端部43bから直角(90度)に屈曲する矩形平板状の第二本体部43を有している伝熱プレート41を例に挙げて説明したが、本発明はこれに限定されず、伝熱プレート41は、例えば、60度〜90度に屈曲する第二本体部43を有していてもよい。なお、上記屈曲の角度は、第二本体部の長さL2の倍数に合せて選択することができる。また、電池モジュール21は、第一本体部42の一端部43bから直角(90度)に屈曲する矩形平板状の第二本体部43を有する伝熱プレート41と、第一本体部42の一端部43bから60度以上90度未満に屈曲する矩形平板状の第二本体部43を有する伝熱プレートと、が混在していてもよい。   In the above embodiment, the heat transfer plate 41 having the rectangular flat plate-like second main body portion 43 bent at a right angle (90 degrees) from the one end portion 43b of the first main body portion 42 has been described as an example. This invention is not limited to this, The heat-transfer plate 41 may have the 2nd main-body part 43 bent to 60 to 90 degree | times, for example. The bending angle can be selected in accordance with a multiple of the length L2 of the second main body portion. In addition, the battery module 21 includes a heat transfer plate 41 having a rectangular flat plate-like second body portion 43 bent at a right angle (90 degrees) from one end portion 43 b of the first body portion 42, and one end portion of the first body portion 42. A heat transfer plate having a rectangular flat plate-like second main body portion 43 bent from 60 degrees to less than 90 degrees from 43 b may be mixed.

上記実施形態又は変形例では、第一本体部42の一端部43bから直角(90度)に屈曲する矩形平板状の第二本体部43を有している伝熱プレート41を例に挙げて説明したが、第一本体部42の一端部43bから折れ曲がらない形状の伝熱プレートとしてもよい。言い換えれば、第二本体部43を有さない伝熱プレートとしてもよい。また、電池モジュール21は、上記実施形態又は変形例において説明した互いに異なる伝熱プレート(第一本体部42の一端部43bから直角(90度)に屈曲する矩形平板状の第二本体部43を有する伝熱プレート41、第二本体部43を有さない伝熱プレート、第一本体部42の一端部43bから60度以上90度未満に屈曲する矩形平板状の第二本体部43を有する伝熱プレート等)が任意に組み合わされた構成としてもよい。   In the said embodiment or modification, the heat transfer plate 41 which has the 2nd main-body part 43 of the rectangular flat plate bent at right angles (90 degree | times) from the one end part 43b of the 1st main-body part 42 is mentioned as an example, and is demonstrated. However, it is good also as a heat-transfer plate of the shape which is not bent from the one end part 43b of the 1st main-body part 42. FIG. In other words, it is good also as a heat-transfer plate which does not have the 2nd main-body part 43. FIG. Further, the battery module 21 includes the different heat transfer plates described in the above embodiment or modification (the rectangular plate-like second main body portion 43 bent at a right angle (90 degrees) from the one end portion 43b of the first main body portion 42). The heat transfer plate 41 having the second main body 43, the heat transfer plate having the second main body 43, and the second main body 43 having a rectangular flat plate shape bent from the one end 43b of the first main body 42 to 60 degrees or more and less than 90 degrees. A structure in which a heat plate or the like is arbitrarily combined may be employed.

上記実施形態又は変形例では、図4に示されるように、全ての伝熱プレート41において、第二本体部43の長さL2が全て同じ(言い換えれば、距離Gが全て同じ)である例を挙げて説明したが、本発明はこれに限定されない。例えば、一方向Dにおける第二本体部43の長さL2は、一方向Dにおいて弾性部材47から遠くなるにつれて徐々に又は段階的に長くなる構成の電池モジュールとしてもよい。言い換えれば、一方向Dにおいて弾性部材47から遠くなるにつれて上記距離Gが徐々に又は段階的に短くなる構成の電池モジュールとしてもよい。   In the embodiment or the modification, as shown in FIG. 4, in all the heat transfer plates 41, the length L2 of the second main body portion 43 is all the same (in other words, the distance G is all the same). Although described above, the present invention is not limited to this. For example, the length L2 of the second main body portion 43 in the one direction D may be a battery module configured to increase gradually or stepwise as the distance from the elastic member 47 in the one direction D increases. In other words, the battery module may be configured such that the distance G decreases gradually or stepwise as the distance from the elastic member 47 increases in one direction D.

この変形例に係る電池モジュールでは、電池セル23の膨張により伝熱プレート41が移動した場合であっても、移動方向に隣接して配置されていた伝熱プレート41の押圧によって変形した熱伝導部材51の位置にまで移動する可能性を低くすることができる。この結果、放熱効率の低下をより一層抑制することができる。   In the battery module according to this modification, even when the heat transfer plate 41 moves due to the expansion of the battery cells 23, the heat conductive member deformed by the pressure of the heat transfer plate 41 arranged adjacent to the moving direction. The possibility of moving to the position 51 can be reduced. As a result, it is possible to further suppress a decrease in heat dissipation efficiency.

上記実施形態又は変形例では、伝熱プレート41における第二本体部43は、第一本体部42から弾性部材47が配置された方向に折れ曲がっている例を挙げて説明したが、全ての伝熱プレート41における一部又は全ての第二本体部43が第一本体部42から弾性部材47が配置された方向とは反対側に折れ曲がっていてもよい。   In the said embodiment or modification, although the 2nd main-body part 43 in the heat-transfer plate 41 gave and demonstrated the example bent in the direction in which the elastic member 47 was arrange | positioned from the 1st main-body part 42, all the heat transfer was demonstrated. A part or all of the second main body 43 in the plate 41 may be bent from the first main body 42 to the opposite side to the direction in which the elastic member 47 is arranged.

上記実施形態又は変形例では、上記実施形態の電池モジュール21は、第一本体部42と第二本体部43との間には、第一本体部42と第二本体部43とを滑らかに接続する曲線部44が配置された伝熱プレート41を備える例を挙げて説明したが、第一本体部42と第二本体部43とが連続する(曲線部44がない)伝熱プレート41を備えていてもよい。また、第二本体部43は、上記実施形態又は変形例のようにフラットではなく、例えば、上方(熱伝導部材51から遠ざかる方向)に曲がる形状としたり、先端の厚みが薄くなるように形成したりしてもよい。これにより、伝熱プレート41の熱伝導部材51への引っ掛かりを低減し、熱伝導部材51の損傷を低減させることができる。   In the embodiment or the modification, the battery module 21 according to the embodiment smoothly connects the first body portion 42 and the second body portion 43 between the first body portion 42 and the second body portion 43. Although the example provided with the heat-transfer plate 41 by which the curved part 44 to arrange | position is given and demonstrated, the 1st main-body part 42 and the 2nd main-body part 43 are provided with the heat-transfer plate 41 which does not have the curved part 44 It may be. In addition, the second main body 43 is not flat as in the above-described embodiment or modification, and is formed, for example, in a shape that bends upward (in a direction away from the heat conducting member 51) or has a thin tip. Or you may. Thereby, the catching to the heat conductive member 51 of the heat-transfer plate 41 can be reduced, and damage to the heat conductive member 51 can be reduced.

上記実施形態又は変形例では、一対のブラケット25,25によって配列体28を一方向Dに加圧した状態で拘束する例を挙げて説明したが、筐体11への取り付け機能を有さない一対のエンドプレートによって配列体28を一方向Dに加圧した状態で拘束してもよい。   In the above-described embodiment or modification, the example in which the array body 28 is restrained in a state of being pressed in one direction D by the pair of brackets 25 and 25 has been described, but a pair that does not have a function of attaching to the housing 11. The end plate may be constrained in a state where the array body 28 is pressurized in one direction D.

上記実施形態又は変形例では、弾性部材47は、図9(A)に示されるように、配列体28の一方の端部に一つだけ配置される例を挙げて説明したが、本発明はこれに限定されない。例えば、弾性部材47は、配列体28の両方の端部に配置されてもよいし、電池セル23の間に配置されてもよい。また、弾性部材47は、図9(B)に示されるように、全て又は一部の電池セル23間に配置されてもよい。   In the above-described embodiment or modification, the elastic member 47 has been described with an example in which only one elastic member 47 is disposed at one end of the array 28 as shown in FIG. 9A. It is not limited to this. For example, the elastic member 47 may be disposed at both ends of the array 28, or may be disposed between the battery cells 23. Moreover, the elastic member 47 may be arrange | positioned among all or one part battery cells 23, as FIG.9 (B) shows.

上記実施形態又は変形例では、ウレタン系ゴム等の弾性材料によって形成されている弾性部材47を例に挙げて説明したが、本発明はこれに限定されることなく、例えば、バネ等の弾性部材であってもよい。   In the above-described embodiment or modification, the elastic member 47 formed of an elastic material such as urethane rubber has been described as an example. However, the present invention is not limited thereto, and for example, an elastic member such as a spring. It may be.

上記実施形態又は変形例では、電池ホルダ22に保持された状態の電池セル23が並設された電池モジュール21を例に挙げて説明したが、電池ホルダ22には保持されず、電池セル23のみからなる電池モジュール21を用いてもよい。   In the said embodiment or modification, although the battery module 21 in which the battery cell 23 of the state hold | maintained at the battery holder 22 was arranged in parallel was mentioned as an example, it was not hold | maintained at the battery holder 22, but only the battery cell 23 was demonstrated. You may use the battery module 21 which consists of.

上記実施形態又は変形例では、被固定部材の例として電池パック10における筐体11の側壁13を例に挙げて説明したが、産業車両に搭載されるカウンタウェイトなどを用いてもよい。   In the above-described embodiment or modification, the side wall 13 of the housing 11 in the battery pack 10 is described as an example of the member to be fixed, but a counterweight mounted on an industrial vehicle may be used.

以上説明した種々の実施形態及び変形例は、本発明の趣旨を逸脱しない範囲で種々、組み合わせられてもよい。   Various embodiments and modifications described above may be combined in various ways without departing from the spirit of the present invention.

10…電池パック、11…筐体、13…側壁、21…電池モジュール、22…電池ホルダ、23(23A〜23G)…電池セル、24c…主面、25…ブラケット(拘束部)、28…配列体、41(41A〜41G)…伝熱プレート、42…第一本体部、43…第二本体部、43a…他端部、43b…一端部、47…弾性部材、51…熱伝導部材、B…ボルト(拘束部)、N…ナット(拘束部)、D…一方向、G…離間距離、M…最大移動量。   DESCRIPTION OF SYMBOLS 10 ... Battery pack, 11 ... Housing | casing, 13 ... Side wall, 21 ... Battery module, 22 ... Battery holder, 23 (23A-23G) ... Battery cell, 24c ... Main surface, 25 ... Bracket (restraint part), 28 ... Arrangement 41, 41 (41A to 41G) ... heat transfer plate, 42 ... first main body, 43 ... second main body, 43a ... other end, 43b ... one end, 47 ... elastic member, 51 ... heat conducting member, B ... bolt (restraint part), N ... nut (restraint part), D ... one direction, G ... separation distance, M ... maximum movement amount.

Claims (2)

熱伝導部材を介して筐体に取り付けられる電池モジュールであって、
一方向に配列される複数の電池セルと、前記電池セルの前記一方向に交差する面である主面に接触するように配置されて前記一方向に配列される複数の伝熱プレートと、を有する配列体と、
前記配列体を前記一方向に加圧した状態で拘束する拘束部と、
前記配列体の一方の端部に配置される弾性部材と、を備え、
前記拘束部は、前記配列体と前記弾性部材とを前記一方向に加圧した状態で拘束し、
前記伝熱プレートは、
前記主面に接触する第一本体部と、
前記第一本体部の一端部から前記主面に交差する方向に折れ曲がり、前記熱伝導部材に接触する第二本体部と、を有し、
前記第二本体部における前記一端部とは反対側の他端部と、前記第一本体部から前記第二本体部が折れ曲がる方向に隣接して配置されている前記伝熱プレートとが、前記電池セルの膨張により前記伝熱プレートが移動する前の状態において、前記電池セルの膨張による前記伝熱プレートの前記一方向における移動量に応じた距離、かつ前記電池セルの膨張による前記伝熱プレートの最大移動量よりも長い距離離れており、
前記一方向における前記第二本体部の長さは、前記一方向において前記弾性部材から遠い位置に配置されている前記電池セルに接触する伝熱プレートほど長い、電池モジュール。
A battery module attached to the housing via a heat conducting member,
A plurality of battery cells arranged in one direction, and a plurality of heat transfer plates arranged in contact with a main surface that is a surface intersecting the one direction of the battery cells and arranged in the one direction. An array having
A restraining portion for restraining the arrayed body in a state of being pressed in the one direction;
An elastic member disposed at one end of the array ,
The restraining portion restrains the array body and the elastic member in a state where the array member and the elastic member are pressurized in the one direction,
The heat transfer plate is
A first main body that contacts the main surface;
A second body part that is bent in a direction intersecting the main surface from one end part of the first body part and is in contact with the heat conducting member;
The other end portion of the second main body portion opposite to the one end portion, and the heat transfer plate disposed adjacent to the first main body portion in a direction in which the second main body portion is bent are the battery. In a state before the heat transfer plate moves due to cell expansion , a distance corresponding to the amount of movement of the heat transfer plate in the one direction due to expansion of the battery cell and the heat transfer plate due to expansion of the battery cell. Contact Ri apart a distance greater than the maximum amount of movement,
The length of the second main body portion in the one direction is a battery module that is longer as the heat transfer plate is in contact with the battery cell arranged at a position far from the elastic member in the one direction .
前記一方向における前記第二本体部の長さは、前記一方向における前記第一本体部の厚みの1倍以上10倍以下である、請求項1記載の電池モジュール。   The battery module according to claim 1, wherein a length of the second main body portion in the one direction is 1 to 10 times a thickness of the first main body portion in the one direction.
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