JP2020043005A - Battery module - Google Patents

Battery module Download PDF

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JP2020043005A
JP2020043005A JP2018170423A JP2018170423A JP2020043005A JP 2020043005 A JP2020043005 A JP 2020043005A JP 2018170423 A JP2018170423 A JP 2018170423A JP 2018170423 A JP2018170423 A JP 2018170423A JP 2020043005 A JP2020043005 A JP 2020043005A
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frame member
battery module
frame
outer frame
piece
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JP7181740B2 (en
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宇大 佐々木
Takahiro Sasaki
宇大 佐々木
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Kojima Industries Corp
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Kojima Press Industry Co Ltd
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Priority to JP2018170423A priority Critical patent/JP7181740B2/en
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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
    • 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

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Battery Mounting, Suspending (AREA)
  • Secondary Cells (AREA)

Abstract

To provide a battery module capable of reducing an amplitude at a center of the battery module in a lamination direction of a laminate.SOLUTION: Outer frame units 31 of first and second frame members 30A, 30B, which are two frame members 30 arranged at positions adjacent to each other in a lamination direction D of a laminate 40, are connected to each other. Therefore, a relative movement of the first and second frame members 30A, 30B can be suppressed. Therefore, when the frame member 30 has an inner portion 32 where an elastic member 32a made of a soft resin is provided, and even when a traveling vibration of a vehicle is applied to a battery module 10, an amplitude at a center 10a of the battery module 10 in the lamination direction D of the laminate 40 can be made relatively small.SELECTED DRAWING: Figure 7

Description

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

特開２０１６−１２９１１０号公報は、電池セルと枠部材とが交互に積層された積層体を有する電池モジュールを開示している。該公報開示の電池モジュールにおいては、図１６に示すように、枠部材２に、電池セル３と枠部材２との間に冷却用空気が流れる流路を形成するためのリブ４が設けられている。該リブ４は、ゴムやスポンジ等の弾性材で形成されており、電池セル３に接着剤によって接着されている。   JP 2016-129110 A discloses a battery module having a stacked body in which battery cells and frame members are alternately stacked. In the battery module disclosed in this publication, as shown in FIG. 16, a rib 4 for forming a flow path through which cooling air flows between the battery cell 3 and the frame member 2 is provided on the frame member 2. I have. The rib 4 is formed of an elastic material such as rubber or sponge, and is adhered to the battery cell 3 with an adhesive.

上記公報開示の技術によれば、図１７に示すように、リブ４が弾性材で形成されており電池セル３に接着されているため、車両走行振動等で上下方向に電池モジュール１が振動しても、リブ４が積層体の積層方向Ｌ１に伸び縮みでき、枠部材２と電池セル３との接触面積が低下することを抑制できる。   According to the technique disclosed in the above publication, as shown in FIG. 17, since the ribs 4 are formed of an elastic material and adhered to the battery cells 3, the battery module 1 vibrates in the vertical direction due to vehicle running vibration or the like. Even so, the ribs 4 can be expanded and contracted in the stacking direction L1 of the stacked body, and a reduction in the contact area between the frame member 2 and the battery cells 3 can be suppressed.

しかし、上記公報開示の技術には、つぎの問題点がある。
弾性材で形成されるリブ４は、積層方向Ｌ１に伸び縮みするだけでなく、積層方向Ｌ１と直交する上下方向Ｌ２にも撓み得る。そのため、電池モジュール１の全体でみると、積層方向Ｌ１の中央部において電池モジュール１の振幅が大きくなるおそれがある。 However, the technology disclosed in the above publication has the following problems.
The ribs 4 formed of an elastic material can bend not only in the stacking direction L1 but also in the vertical direction L2 perpendicular to the stacking direction L1. Therefore, when viewed as a whole of the battery module 1, the amplitude of the battery module 1 may increase at the center in the stacking direction L1.

特開２０１６−１２９１１０号公報JP 2016-129110 A

本発明の目的は、積層体の積層方向において、電池モジュールの中央部における振幅を小さくできる、電池モジュールを提供することにある。   An object of the present invention is to provide a battery module that can reduce the amplitude at the center of the battery module in the stacking direction of the stack.

上記目的を達成する本発明はつぎの通りである。
（１） 電池セルと枠部材とが交互に積層された積層体を有する電池モジュールであって、
前記枠部材は、周方向に連続する外枠部と、該外枠部の内周側にあり少なくとも一部で前記電池セルと接触する内側部と、を有しており、
前記外枠部は、硬質樹脂製であり、
前記内側部には、前記電池セルと接触する範囲に軟質樹脂製の弾性部材が設けられており、
前記積層体の積層方向に隣り合う位置に配置される２つの枠部材の一方である第１の枠部材の外枠部と、前記２つの枠部材の他方である第２の枠部材の外枠部とは、互いに結合されている、電池モジュール。
（２） 前記第１の枠部材に、爪と爪受けの一方からなる第１の係合部が設けられており、前記第２の枠部材に、前記爪と前記爪受けの他方からなる第２の係合部が設けられており、
前記第１の係合部と前記第２の係合部とを互いに係合させることで、前記第１の枠部材の外枠部と前記第２の枠部材の外枠部とは、互いに結合されている、（１）記載の電池モジュール。
（３） 前記第１の枠部材の外枠部に、前記第２の枠部材に接近する方向に延びる突出片が設けられており、該突出片に前記第１の係合部が設けられている、（２）記載の電池モジュール。
（４） 前記突出片は、延び方向中間部に設けられる段部と、該段部よりも延び方向先側にある突出片前部と、前記段部よりも延び方向の手前側にあり前記第１の枠部材の外枠部に連なる突出片後部と、を有しており、
前記第１の係合部は、前記突出片前部に設けられている、（３）記載の電池モジュール。
（５） 前記第１の枠部材の外枠部から前記突出片後部にわたって連続するリブが設けられている、（４）記載の電池モジュール。
（６） 前記外枠部は、前記積層体の積層方向から見たときに、前記内側部の上側に位置する上辺と、前記内側部の下側に位置する下片と、前記内側部の右側に位置する右片と、前記内側部の左側に位置する左片と、の４辺を有しており、
前記４辺のそれぞれで、前記第１の枠部材の外枠部と前記第２の枠部材の外枠部とは、互いに結合されている、（１）〜（５）記載の電池モジュール。
（７） 前記内側部の弾性部材は、前記枠部材の前記積層方向の両面に設定されており該枠部材を貫通して繋がっている、（１）〜（６）記載の電池モジュール。 The present invention that achieves the above object is as follows.
(1) A battery module having a stacked body in which battery cells and frame members are alternately stacked,
The frame member has an outer frame portion that is continuous in the circumferential direction, and an inner portion that is on the inner circumferential side of the outer frame portion and at least partially contacts the battery cell,
The outer frame portion is made of a hard resin,
The inner portion is provided with an elastic member made of a soft resin in a range in contact with the battery cell,
An outer frame portion of a first frame member that is one of two frame members arranged at positions adjacent to each other in the stacking direction of the laminate, and an outer frame of a second frame member that is the other of the two frame members The parts are battery modules that are connected to each other.
(2) The first frame member is provided with a first engagement portion formed of one of a claw and a claw receiver, and the second frame member is provided with a first engagement portion formed of the other of the claw and the claw receiver. 2 engagement portions are provided,
By engaging the first engagement portion and the second engagement portion with each other, the outer frame portion of the first frame member and the outer frame portion of the second frame member are connected to each other. The battery module according to (1), wherein:
(3) A protruding piece extending in a direction approaching the second frame member is provided on an outer frame portion of the first frame member, and the first engaging portion is provided on the protruding piece. The battery module according to (2).
(4) The protruding piece is a step provided at an intermediate portion in the extending direction, a protruding piece front located on the forward side in the direction extending from the step, and a front side in the direction extending from the step. And a projecting piece rear portion connected to the outer frame portion of the first frame member.
The battery module according to (3), wherein the first engagement portion is provided at a front portion of the protruding piece.
(5) The battery module according to (4), wherein a continuous rib is provided from an outer frame portion of the first frame member to a rear portion of the protruding piece.
(6) The outer frame portion, when viewed from the stacking direction of the laminate, includes an upper side located above the inner portion, a lower piece located below the inner portion, and a right side of the inner portion. , And a left piece located on the left side of the inner part, and has four sides,
The battery module according to any one of (1) to (5), wherein the outer frame portion of the first frame member and the outer frame portion of the second frame member are connected to each other on each of the four sides.
(7) The battery module according to any one of (1) to (6), wherein the elastic members on the inner side are set on both sides of the frame member in the laminating direction and are connected through the frame member.

上記（１）の電池モジュールでは、つぎの効果を得ることができる。
積層体の積層方向に隣り合う位置に配置される２つの枠部材である第１、第２の枠部材の外枠部同士が、互いに結合されているため、第１、第２の枠部材の相対動を抑制できる。したがって、枠部材が、軟質樹脂製の弾性部材が設けられる内側部を有する場合であっても、積層体の積層方向において電池モジュールの中央部における振幅を比較的小さくできる。 The following effects can be obtained in the battery module of the above (1).
Since the outer frame portions of the first and second frame members, which are two frame members arranged at positions adjacent to each other in the stacking direction of the stacked body, are connected to each other, the first and second frame members have the same shape. Relative motion can be suppressed. Therefore, even when the frame member has an inner portion on which the elastic member made of a soft resin is provided, the amplitude at the central portion of the battery module in the stacking direction of the stacked body can be made relatively small.

また、枠部材が、電池セルと接触する範囲に軟質樹脂製の弾性部材が設けられる内側部を有するため、電池モジュールに上下方向の振動が加わった場合であっても、弾性部材と電池セルが振動することで振動エネルギーの少なくとも一部を吸収できる。その結果、電池モジュールの振幅の増大化を抑制できる。   In addition, since the frame member has an inner portion in which the elastic member made of a soft resin is provided in a range in contact with the battery cell, even when the battery module is subjected to vertical vibration, the elastic member and the battery cell may be separated. By vibrating, at least a part of the vibration energy can be absorbed. As a result, an increase in the amplitude of the battery module can be suppressed.

上記（２）の電池モジュールでは、つぎの効果を得ることができる。
爪と爪受けの一方からなる第１の係合部と、爪と爪受けの他方からなる第２の係合部とを互いに係合させることで、第１の枠部材と第２の枠部材とが互いに結合されるため、簡易な構造で第１の枠部材と第２の枠部材とを結合することができる。また、第１の係合部を第１の枠部材の外枠部に一体に形成することができ、第２の係合部を第２の枠部材の外枠部に一体に形成することができ、コスト上有利である、 In the battery module of the above (2), the following effects can be obtained.
The first frame member and the second frame member are engaged with each other by engaging a first engagement portion formed of one of the claw and the claw receiver and a second engagement portion formed of the other of the claw and the claw receiver. Are connected to each other, so that the first frame member and the second frame member can be connected with a simple structure. Further, the first engaging portion can be formed integrally with the outer frame portion of the first frame member, and the second engaging portion can be formed integrally with the outer frame portion of the second frame member. Possible and cost-effective,

上記（３）の電池モジュールでは、つぎの効果を得ることができる。
突出片に第１の係合部が設けられているため、突出片を撓ませることで第１の係合部を第２の係合部に係合させることができる。 The following effects can be obtained with the battery module of (3).
Since the first engaging portion is provided on the projecting piece, the first engaging portion can be engaged with the second engaging portion by bending the projecting piece.

上記（４）の電池モジュールでは、つぎの効果を得ることができる。
第１の係合部が突出片前部に設けられているため、突出片前部を撓ませることで第１の係合部を第２の係合部に係合させることができる。 The following effects can be obtained with the battery module of the above (4).
Since the first engaging portion is provided at the front portion of the projecting piece, the first engaging portion can be engaged with the second engaging portion by bending the front portion of the projecting piece.

上記（５）の電池モジュールでは、つぎの効果を得ることができる。
第１の枠部材の外枠部から突出片後部にわたって連続するリブが設けられているため、突出片前部を撓ませて第１の係合部を第２の係合部に係合させるときに、突出片後部と第１の枠部材の外枠部とが撓むこと（変形すること）を抑制することができる。 The following effects can be obtained with the battery module of the above (5).
Since the ribs are provided continuously from the outer frame portion of the first frame member to the rear portion of the projecting piece, when the front portion of the projecting piece is bent to engage the first engaging portion with the second engaging portion. In addition, it is possible to prevent the rear portion of the protruding piece and the outer frame portion of the first frame member from being bent (deformed).

上記（６）の電池モジュールでは、つぎの効果を得ることができる。
外枠部の上下左右の４辺のそれぞれ（４辺の全部）で、第１の枠部材の外枠部と第２の枠部材の外枠部とが結合されているため、４辺全てで結合されていない場合に比べて、第１の枠部材と第２の枠部材との相対動を強固に抑制できる。よって、電池モジュールの積層方向の中央部における振幅を小さくする点において極めて有利である。 The following effects can be obtained in the battery module of the above (6).
Since the outer frame portion of the first frame member and the outer frame portion of the second frame member are joined at each of the four sides (upper, lower, left, and right) of the outer frame portion, all four sides are combined. The relative movement between the first frame member and the second frame member can be more firmly suppressed as compared with the case where the first frame member is not connected. Therefore, it is very advantageous in that the amplitude at the center of the battery module in the stacking direction is reduced.

上記（７）の電池モジュールでは、つぎの効果を得ることができる。
内側部の弾性部材が、枠部材の積層方向の両面に設定されており枠部材を貫通して繋がっているため、電池モジュールに上下方向の振動が加わった場合であっても、弾性部材と電池セルが振動することで振動エネルギーを効率よく吸収できる。その結果、電池モジュール全体での振幅の増大化を効率よく抑制できる。 In the battery module of (7), the following effects can be obtained.
Since the elastic member on the inner side is set on both sides in the stacking direction of the frame member and is connected through the frame member, even when vertical vibration is applied to the battery module, the elastic member and the battery By vibrating the cell, vibration energy can be efficiently absorbed. As a result, an increase in the amplitude of the entire battery module can be efficiently suppressed.

本発明実施例の電池モジュールの平面図である。It is a top view of the battery module of an example of the present invention. 本発明実施例の電池モジュールの部分分解断面図である。FIG. 2 is a partially exploded sectional view of the battery module according to the embodiment of the present invention. 本発明実施例の電池モジュールにおける枠部材の、積層方向の一側から見たときにおける斜視図である。It is a perspective view when the frame member in the battery module of the present invention example is seen from one side in the lamination direction. 本発明実施例の電池モジュールにおける枠部材の、積層方向の他側から見たときにおける斜視図である。It is a perspective view when the frame member in the battery module of an example of the present invention is seen from the other side in the lamination direction. 本発明実施例の電池モジュールにおける枠部材の、正面図である。It is a front view of the frame member in the battery module of this invention Example. 本発明実施例の電池モジュールにおける枠部材の、部分拡大平面図である。FIG. 3 is a partially enlarged plan view of a frame member in the battery module according to the embodiment of the present invention. 本発明実施例の電池モジュールの、第１の枠部材と第２の枠部材との結合状態を示す部分拡大断面図である。FIG. 4 is a partially enlarged cross-sectional view showing a connection state of a first frame member and a second frame member of the battery module according to the embodiment of the present invention. 本発明実施例の電池モジュールにおける枠部材の、枠部材の内側部の一部のみに弾性部材が設けられている場合の、正面図である。FIG. 4 is a front view of the battery module according to the embodiment of the present invention in which an elastic member is provided only on a part of an inner portion of the frame member. 本発明実施例の電池モジュールにおける枠部材の、枠部材の内側部の一部のみに弾性部材が設けられている場合の、正面図である。FIG. 4 is a front view of the battery module according to the embodiment of the present invention in which an elastic member is provided only on a part of an inner portion of the frame member. 本発明実施例の電池モジュールにおける枠部材の、枠部材の内側部の一部のみに弾性部材が設けられている場合の、断面図である。It is sectional drawing in the case where an elastic member is provided only in a part of inner part of the frame member of the frame member in the battery module of this invention Example. 本発明実施例の電池モジュールにおける枠部材の、弾性部材のリブの拡大断面図である。It is an expanded sectional view of a rib of an elastic member of a frame member in a battery module of an example of the present invention. 弾性部材のリブの、図１１に示す場合よりも高さが大とされている場合の、拡大断面図である。なお、図中点線は、図１１に示す場合を示している。FIG. 12 is an enlarged sectional view of a case where the height of the rib of the elastic member is larger than that shown in FIG. 11. Note that the dotted line in the figure shows the case shown in FIG. 弾性部材のリブの、図１１に示す場合よりも幅が大とされている場合の、拡大断面図である。なお、図中点線は、図１１に示す場合を示している。FIG. 12 is an enlarged cross-sectional view of a case where the width of the rib of the elastic member is larger than that shown in FIG. 11. Note that the dotted line in the figure shows the case shown in FIG. 弾性部材のリブの、先細り形状とされている場合の、拡大断面図である。なお、図中点線は、図１１に示す場合を示している。It is an expanded sectional view when the rib of an elastic member is made into the taper shape. Note that the dotted line in the figure shows the case shown in FIG. 本発明実施例の電池モジュールにおける枠部材の、弾性部材のリブが正面視で丸形状とされている場合の、正面図である。It is a front view in case the rib of the elastic member of the frame member in the battery module of this invention Example is made into a circular shape in a front view. 従来の電池モジュールの分解斜視図である。It is an exploded perspective view of the conventional battery module. 従来の電池モジュールの、リブが積層方向に変形したときの側面図である。FIG. 10 is a side view of a conventional battery module when ribs are deformed in a stacking direction.

以下に、図１〜図１５を参照して、本発明実施例の電池モジュールを説明する。   Hereinafter, a battery module according to an embodiment of the present invention will be described with reference to FIGS. 1 to 15.

本発明実施例の電池モジュール１０は、ハイブリッド自動車や電気自動車等の車両に搭載される。   The battery module 10 according to the embodiment of the present invention is mounted on a vehicle such as a hybrid vehicle or an electric vehicle.

本発明実施例の電池モジュール１０は、図１に示すように、発熱体である電池セル２０と、枠部材３０とが交互に積層された積層体４０と、を有する。電池モジュール１０は、また、積層体４０の積層方向Ｄの両外側に配置されるエンドプレート５０を有する。   As shown in FIG. 1, the battery module 10 according to the embodiment of the present invention includes a battery cell 20 that is a heating element and a stacked body 40 in which frame members 30 are alternately stacked. The battery module 10 also has end plates 50 arranged on both outer sides in the stacking direction D of the stack 40.

〔エンドプレート５０〕
エンドプレート５０は、積層体４０の積層方向Ｄの一側に配置される第１のエンドプレート５１と、積層体４０の積層方向Ｄの他側に配置される第２のエンドプレート５２と、を有する。第１のエンドプレート５１と第２のエンドプレート５２とで、積層体４０を積層方向Ｄの両側から挟んでいる。 [End plate 50]
The end plate 50 includes a first end plate 51 arranged on one side of the stacking direction D of the stack 40 and a second end plate 52 arranged on the other side of the stacking direction D of the stack 40. Have. The stacked body 40 is sandwiched between the first end plate 51 and the second end plate 52 from both sides in the stacking direction D.

第１、第２のエンドプレート５１，５２は、積層方向Ｄに延びる図示略の拘束バンドにて互いに結合されている。拘束バンドと第１、第２のエンドプレート５１，５２とは、ビス、ボルト等を用いて結合されている。   The first and second end plates 51 and 52 are connected to each other by a restraint band (not shown) extending in the stacking direction D. The restraining band and the first and second end plates 51 and 52 are connected using screws, bolts, or the like.

〔積層体４０の電池セル２０〕
電池セル（セルといってもよい。）２０は、上部に設けられる端子２１を除いて、略正面視矩形の角形電池である。電池セル２０は、たとえばリチウムイオン電池、ニッケル水素電池等の二次電池である。各電池セル２０は、直列接続されている。 [Battery cell 20 of laminate 40]
The battery cell (may be referred to as a cell) 20 is a rectangular battery having a substantially rectangular shape in a front view, except for a terminal 21 provided on an upper portion. The battery cell 20 is a secondary battery such as a lithium ion battery or a nickel hydride battery. Each battery cell 20 is connected in series.

〔積層体４０の枠部材３０〕
枠部材３０は、樹脂製である。枠部材３０は、電気絶縁材である。枠部材３０は、図５に示すように、正面視で（積層体４０の積層方向Ｄから見たときに）ほぼ矩形である。枠部材３０は、正面視で、周方向に全周にわたって連続して設けられる外枠部３１と、外枠部３１の内周側にあり少なくとも一部で電池セル２０と接触する内側部３２と、を有している。 [Frame member 30 of laminate 40]
The frame member 30 is made of resin. The frame member 30 is an electric insulating material. As shown in FIG. 5, the frame member 30 is substantially rectangular when viewed from the front (when viewed from the stacking direction D of the stack 40). The frame member 30 includes an outer frame portion 31 provided continuously over the entire circumference in a front view, and an inner portion 32 on the inner circumferential side of the outer frame portion 31 and at least partially in contact with the battery cell 20. ,have.

外枠部３１は、硬質樹脂製であり、硬質樹脂は、たとえばＰＰ（ポリプロピレン）である。外枠部３１は、正面視で、内側部３２の上側に位置する上辺３１ａと、内側部３２の下側に位置する下片３１ｂと、内側部３２の右側に位置する右片３１ｃと、内側部３２の左側に位置する左片３１ｄと、の４辺を有している。右片３１ｃと左片３１ｄは、逆であってもよい。   The outer frame portion 31 is made of a hard resin, and the hard resin is, for example, PP (polypropylene). The outer frame portion 31 includes an upper side 31a positioned above the inner portion 32, a lower piece 31b positioned below the inner portion 32, a right piece 31c positioned to the right of the inner portion 32, and a And a left piece 31d located on the left side of the portion 32. The right piece 31c and the left piece 31d may be reversed.

内側部３２には、電池セル２０と接触する範囲に、外枠部３１の材料の硬質樹脂よりも軟質で弾性変形可能な軟質樹脂製の弾性部材３２ａが設けられている。軟質樹脂は、たとえばエラストマ（弾性体）である。弾性部材３２ａは内側部３２の一部である。   The inner portion 32 is provided with an elastic member 32 a made of a soft resin that is softer and more elastically deformable than the hard resin of the material of the outer frame portion 31 in a range in contact with the battery cell 20. The soft resin is, for example, an elastomer (elastic body). The elastic member 32a is a part of the inner part 32.

弾性部材３２ａは、図５に示すように、正面視で内側部３２の全体に設けられている。ただし、弾性部材３２ａは、図８、図９に示すように、正面視で内側部３２の一部のみに設けられていてもよい。これにより、弾性部材３２ａと電池セル２０との接触範囲を変更でき、弾性部材３２ａの変形のし易さ（柔らかさ）を調節できる。
なお、図８は、弾性部材３２ａが、内側部３２に設けられる楕円部３２ｃの内側のみに設けられる場合を示している。また、図９は、弾性部材３２ａが、内側部３２に左右方向に断続的に設けられる場合を示している。 As shown in FIG. 5, the elastic member 32a is provided on the entire inner portion 32 when viewed from the front. However, the elastic member 32a may be provided only on a part of the inner portion 32 when viewed from the front, as shown in FIGS. Thereby, the contact range between the elastic member 32a and the battery cell 20 can be changed, and the elastic member 32a can be easily deformed (soft).
FIG. 8 shows a case where the elastic member 32a is provided only inside the elliptical portion 32c provided in the inner portion 32. FIG. 9 shows a case where the elastic member 32a is provided intermittently in the left-right direction on the inner portion 32.

弾性部材３２ａが内側部３２の一部のみに設けられる場合、弾性部材３２ａを除く内側部３２は、外枠部３１と同じ硬質樹脂製であり、外枠部３１と一体に形成されていることが望ましい。   When the elastic member 32a is provided only in a part of the inner portion 32, the inner portion 32 except the elastic member 32a is made of the same hard resin as the outer frame portion 31 and is formed integrally with the outer frame portion 31. Is desirable.

弾性部材３２ａは、図２に示すように、枠部材３０の積層方向Ｄの両面３０ａ、３０ｂに設定されており枠部材３０を積層方向Ｄに貫通して繋がっている。ただし、枠部材３０の積層方向Ｄの両面３０ａ、３０ｂに設定される弾性部材３２ａは、図１０に示すように、その一部が枠部材３０を積層方向に貫通して繋がっていなくてもよい。これにより、弾性部材３２ａの変形のし易さを調節できる。   As shown in FIG. 2, the elastic members 32 a are set on both sides 30 a and 30 b in the stacking direction D of the frame member 30, and penetrate and connect the frame member 30 in the stacking direction D. However, the elastic members 32a set on both sides 30a, 30b of the frame member 30 in the stacking direction D do not have to be partly penetrated and connected to the frame member 30 in the stacking direction, as shown in FIG. . Thereby, the ease with which the elastic member 32a is deformed can be adjusted.

枠部材３０の両面３０ａ、３０ｂに設定される弾性部材３２ａには、積層方向Ｄの外側に突出する複数の流路形成リブ３２ｂが一体形成されている。流路形成リブ３２ｂは、積層方向Ｄから見たとき、図５に示すように線状であってもよく、図１５に示すように点状であってもよく、図示は省略するがその他の形状であってもよい。また、流路形成リブ３２ｂの断面形状は、図１１に示すように矩形であってもよく、図１２に示すように図１１に示す場合よりも高さが大とされた矩形であってもよく、図１３に示すように図１１に示す場合よりも幅が大とされた矩形であってもよく、図１４に示すように先細りする形状であってもよい。   A plurality of flow path forming ribs 32b projecting outward in the stacking direction D are integrally formed on the elastic members 32a set on both surfaces 30a and 30b of the frame member 30. The flow path forming rib 32b may be linear as shown in FIG. 5 or dotted as shown in FIG. 15 when viewed from the laminating direction D. It may be shaped. Further, the cross-sectional shape of the flow path forming rib 32b may be a rectangle as shown in FIG. 11 or a rectangle having a height larger than that shown in FIG. 11 as shown in FIG. Alternatively, as shown in FIG. 13, a rectangular shape having a larger width than the case shown in FIG. 11 may be used, or a tapered shape may be used as shown in FIG.

流路形成リブ３２ｂが弾性部材３２ａに設けられているため、弾性部材３２ａと該弾性部材３２ａに対向する位置にある電池セル２０との間に冷媒流路が形成される。冷媒流路には電池セル２０を冷却する冷媒（たとえば空気）が流れるようになっている。なお、本発明図示例では、流路形成リブ３２ｂは枠部材３０の両面３０ａ、３０ｂに設けられているが、流路形成リブ３２ｂは枠部材の面３０ａのみに設けられていてもよく、面３０ｂのみに設けられていてもよい。すなわち流路形成リブ３２ｂは、枠部材３０の面３０ａ、３０ｂの少なくともいずれか一方のみに設けられていればよい。   Since the flow path forming rib 32b is provided on the elastic member 32a, a refrigerant flow path is formed between the elastic member 32a and the battery cell 20 located at a position facing the elastic member 32a. A coolant (for example, air) for cooling the battery cells 20 flows through the coolant channel. In the illustrated example of the present invention, the flow path forming rib 32b is provided on both surfaces 30a and 30b of the frame member 30, but the flow path forming rib 32b may be provided only on the surface 30a of the frame member. 30b may be provided only. That is, the flow path forming rib 32b only needs to be provided on at least one of the surfaces 30a and 30b of the frame member 30.

図２に示すように、枠部材３０が、硬質樹脂製からなる部分（外枠部３１と弾性部材３２ａを除く内側部３２）と、弾性部材３２ａが設けられる部分と、を有している。そのため、枠部材３０は、２種類の樹脂材料を用いて製造されている。枠部材３０は、特に限定されるものではないが、たとえば二色成形にて製造される。   As shown in FIG. 2, the frame member 30 has a portion made of hard resin (the inner portion 32 excluding the outer frame portion 31 and the elastic member 32a) and a portion provided with the elastic member 32a. Therefore, the frame member 30 is manufactured using two types of resin materials. The frame member 30 is manufactured by, for example, but not limited to, two-color molding.

図７に示すように、積層体４０の積層方向Ｄに隣り合う２つの枠部材３０，３０の外側部３１同士は、互いに結合されている。すなわち、積層体４０の積層方向Ｄに隣り合う位置に配置される２つの枠部材３０，３０の一方である第１の枠部材３０Ａの外枠部３１と、２つの枠部材３０，３０の他方である第２の枠部材３０Ｂの外枠部３１とは、互いに結合されている。   As shown in FIG. 7, outer portions 31 of two frame members 30, 30 adjacent to each other in the stacking direction D of the stacked body 40 are connected to each other. That is, the outer frame portion 31 of the first frame member 30A, which is one of the two frame members 30 arranged at a position adjacent to the stacking direction D of the stacked body 40, and the other of the two frame members 30, 30 And the outer frame portion 31 of the second frame member 30B.

第１の枠部材３０Ａに、爪と爪受けの一方からなる第１の係合部３３が設けられており、第２の枠部材３０Ｂに、爪と爪受けの他方からなる第２の係合部３４が設けられている。そして、第１の係合部３３と第２の係合部３４を係合させることで、第１の枠部材３０Ａと第２の枠部材３０Ｂとが、互いに結合される。   The first frame member 30A is provided with a first engagement portion 33 formed of one of a claw and a claw receiver, and the second frame member 30B is provided with a second engagement portion 33 formed of the other of a claw and a claw receiver. A part 34 is provided. Then, by engaging the first engagement portion 33 and the second engagement portion 34, the first frame member 30A and the second frame member 30B are connected to each other.

第２の枠部材３０Ｂに設けられる第２の係合部３４は、第１の枠部材３０Ａに設けられる第１の係合部３３と同数設けられており、第１の係合部３３に対応する位置に設けられている。   The second engagement portions 34 provided on the second frame member 30B are provided in the same number as the first engagement portions 33 provided on the first frame member 30A, and correspond to the first engagement portions 33. It is provided in the position where it does.

図６、図７に示すように、第１の枠部材３０Ａの外枠部３１には、第２の枠部材３０Ｂに接近する方向に延びる突出片３５が一体に設けられており、突出片３５に第１の係合部３３が設けられている。   As shown in FIGS. 6 and 7, the outer frame portion 31 of the first frame member 30 </ b> A is integrally provided with a projecting piece 35 extending in a direction approaching the second frame member 30 </ b> B. Is provided with a first engagement portion 33.

突出片３５は、突出片３５の延び方向中間部に設けられる段部３５ａと、段部３５ａよりも延び方向の先側（第２の枠部材３０Ｂ側）にある突出片前部３５ｂと、段部３５ａよりも延び方向の手前側（第１の枠部材３０Ａ側）にある突出片後部３５ｃと、を有する。第１の係合部３３は、突出片３５の突出片前部３５ｂに設けられている。突出片３５は、突出片後部３５ｃで第１の枠部材３０Ａの外枠部３１に連なっている。   The protruding piece 35 includes a step 35a provided at an intermediate portion in the extending direction of the protruding piece 35, a protruding piece front 35b on the front side (the second frame member 30B side) in the extending direction of the step 35a, And a protruding piece rear portion 35c located on the near side (the first frame member 30A side) in the extending direction from the portion 35a. The first engaging portion 33 is provided on a protruding piece front portion 35 b of the protruding piece 35. The protruding piece 35 is connected to the outer frame 31 of the first frame member 30A at a protruding piece rear portion 35c.

突出片３５は、図３に示すように、第１の外側部３０Ａの外側部３１の、上下左右の４辺３１ａ，３１ｂ，３１ｃ，３１ｄのそれぞれに設けられている。４辺３１ａ，３１ｂ，３１ｃ，３１ｄの各辺に設けられる突出片３５の数は、１個であってもよく、複数であってもよい。なお、図示例では、上辺３１ａと下片３１ｂには突出片３５がそれぞれ２個設けられ、右片３１ｃと左片３１ｄには突出片３５がそれぞれ１個設けられる場合を示している。   As shown in FIG. 3, the protruding pieces 35 are provided on the four sides 31a, 31b, 31c and 31d of the outer part 31 of the first outer part 30A. The number of the protruding pieces 35 provided on each side of the four sides 31a, 31b, 31c, 31d may be one or plural. The illustrated example shows a case in which two protruding pieces 35 are provided on the upper side 31a and the lower piece 31b, respectively, and one protruding piece 35 is provided on each of the right piece 31c and the left piece 31d.

第１の係合部３３は、複数の突出片３５の全部に設けられている。また、第２の枠部材３０Ｂの第２の係合部３４は、第１の係合部３３と同数設けられており第１の係合部３３に対応する位置に設けられている。そのため、４辺３１ａ，３１ｂ，３１ｃ，３１ｄのそれぞれで、第１の枠部材３０Ａの外枠部３１と第２の枠部材３０Ｂの外枠部３１とが、互いに結合されている。   The first engagement portion 33 is provided on all of the plurality of projecting pieces 35. Further, the second engagement portions 34 of the second frame member 30 </ b> B are provided in the same number as the first engagement portions 33, and are provided at positions corresponding to the first engagement portions 33. Therefore, the outer frame portion 31 of the first frame member 30A and the outer frame portion 31 of the second frame member 30B are connected to each other on each of the four sides 31a, 31b, 31c, and 31d.

突出片３５には、突出片３５の剛性を向上させるためにリブ３５ｄが一体に形成されている。リブ３５ｄは、突出片後部３５ｃに設けられており、突出片前部３５ｂには設けられていない。リブ３５ｄは、第１の枠部材３０Ａの外枠部３１から突出片後部３５ｃにわたって連続して設けられている。リブ３５ｄは、１個のみ設けられていてもよく、複数設けられていてもよい。   A rib 35d is formed integrally with the protruding piece 35 in order to improve the rigidity of the protruding piece 35. The rib 35d is provided on the protruding piece rear portion 35c, and is not provided on the protruding piece front portion 35b. The rib 35d is provided continuously from the outer frame portion 31 of the first frame member 30A to the projecting piece rear portion 35c. Only one rib 35d may be provided, or a plurality of ribs 35d may be provided.

つぎに、本発明実施例の作用、効果を説明する。   Next, the operation and effect of the embodiment of the present invention will be described.

（Ａ） 積層体４０の積層方向Ｄに隣り合う位置に配置される２つの枠部材３０である第１、第２の枠部材３０Ａ，３０Ｂの外枠部３１同士が、互いに結合されているため、第１、第２の枠部材３０Ａ，３０Ｂの相対動を抑制できる。したがって、枠部材３０が軟質樹脂製の弾性部材３２ａが設けられる内側部３２を有する場合であって、かつ、車両の走行振動が電池モジュール１０に加わった場合であっても、積層体４０の積層方向Ｄにおいて電池モジュール１０の中央部１０ａにおける振幅を比較的小さくできる。 (A) Since the outer frame portions 31 of the first and second frame members 30A and 30B, which are two frame members 30 arranged at positions adjacent to each other in the stacking direction D of the stacked body 40, are connected to each other. , The relative movement of the first and second frame members 30A, 30B can be suppressed. Therefore, even when the frame member 30 has the inner portion 32 on which the elastic member 32a made of a soft resin is provided, and when the running vibration of the vehicle is applied to the battery module 10, the stacking of the stacked body 40 is performed. In the direction D, the amplitude at the central portion 10a of the battery module 10 can be made relatively small.

（Ｂ） 枠部材４０が、電池セル２０と接触する範囲に軟質樹脂製の弾性部材３２ａが設けられる内側部３２を有するため、電池モジュール１０に上下方向の振動が加わった場合であっても、弾性部材３２ａと電池セル２０が振動することで振動エネルギーの少なくとも一部を吸収できる。その結果、電池モジュール１０の振幅の増大化を抑制できる。 (B) Since the frame member 40 has the inner portion 32 in which the elastic member 32 a made of a soft resin is provided in a range in contact with the battery cell 20, even when the battery module 10 is subjected to vertical vibration, The vibration of the elastic member 32a and the battery cell 20 can absorb at least a part of the vibration energy. As a result, an increase in the amplitude of the battery module 10 can be suppressed.

（Ｃ） 爪と爪受けの一方からなる第１の係合部３３と、爪と爪受けの他方からなる第２の係合部３４とを互いに係合させることで、第１の枠部材３０Ａと第２の枠部材３０Ｂとが互いに結合されるため、簡易な構造で第１の枠部材３０Ａと第２の枠部材３０Ｂとを結合することができる。また、第１の係合部３３を第１の枠部材３０Ａの外枠部３１に一体に形成することができ、第２の係合部３４を第２の枠部材３０Ｂの外枠部３１に一体に形成することができ、コスト上有利である、 (C) The first frame member 30A is formed by engaging the first engagement portion 33 formed of one of the claw and the claw receiver and the second engagement portion 34 formed of the other of the claw and the claw receiver with each other. Since the first frame member 30B and the second frame member 30B are coupled to each other, the first frame member 30A and the second frame member 30B can be coupled with a simple structure. Further, the first engaging portion 33 can be formed integrally with the outer frame portion 31 of the first frame member 30A, and the second engaging portion 34 can be formed on the outer frame portion 31 of the second frame member 30B. It can be formed integrally, which is advantageous in cost.

（Ｄ） 突出片３５に第１の係合部３３が設けられているため、突出片３５を撓ませることで第１の係合部３３を第２の係合部３４に係合させることができる。 (D) Since the first engaging portion 33 is provided on the projecting piece 35, the first engaging portion 33 can be engaged with the second engaging portion 34 by bending the projecting piece 35. it can.

（Ｅ） 第１の係合部３３が突出片前部３５ｂに設けられているため、突出片前部３５ｂを撓ませることで第１の係合部３３を第２の係合部３４に係合させることができる。 (E) Since the first engaging portion 33 is provided on the protruding piece front portion 35b, the first engaging portion 33 is engaged with the second engaging portion 34 by bending the protruding piece front portion 35b. Can be combined.

（Ｆ） 第１の枠部材３０Ａの外枠部３１から突出片後部３５ｃにわたって連続するリブ３５ｄが設けられているため、突出片前部３５ｂを撓ませて第１の係合部３３を第２の係合部３４に係合させるときに、突出片後部３５ｃと第１の枠部材３０Ａの外枠部３１とが撓むこと（変形すること）を抑制することができる。 (F) Since the rib 35d is provided continuously from the outer frame portion 31 of the first frame member 30A to the projecting piece rear portion 35c, the projecting piece front portion 35b is bent to cause the first engaging portion 33 to move to the second engaging portion 33b. When engaging with the engaging portion 34, the bending (deformation) of the projecting piece rear portion 35c and the outer frame portion 31 of the first frame member 30A can be suppressed.

（Ｇ） 外枠部３１の上下左右の４辺３１ａ，３１ｂ，３１ｃ，３１ｄのそれぞれ（４辺の全部）で、第１の枠部材３０Ａの外枠部３１と第２の枠部材３０Ｂの外枠部３１とが結合されているため、４辺３１ａ，３１ｂ，３１ｃ，３１ｄ全てで結合されていない場合に比べて、第１の枠部材３０Ａと第２の枠部材３０Ｂとの相対動を強固に抑制できる。よって、電池モジュール１０の積層方向Ｄの中央部１０ａにおける振幅を小さくする点において極めて有利である。 (G) The outer frame portion 31 of the first frame member 30A and the outer frame portion 30B of the second frame member 30B are respectively located on all four sides 31a, 31b, 31c, 31d of the upper, lower, left and right sides of the outer frame portion 31 (all four sides). Since the frame 31 is connected, the relative movement between the first frame member 30A and the second frame member 30B is stronger than in the case where the four sides 31a, 31b, 31c, and 31d are not connected. Can be suppressed. Therefore, it is extremely advantageous in that the amplitude at the central portion 10a of the battery module 10 in the stacking direction D is reduced.

（Ｈ） 内側部３２の弾性部材３２ａが、枠部材３０の積層方向Ｄの両面３０ａ、３０ｂに設定されており枠部材３０を貫通して繋がっているため、電池モジュール１０に上下方向の振動が加わった場合であっても、弾性部材３２ａと電池セル２０が振動することで振動エネルギーを効率よく吸収できる。その結果、電池モジュール１０全体での振幅の増大化を効率よく抑制できる。 (H) The elastic members 32 a of the inner portion 32 are set on both sides 30 a and 30 b in the stacking direction D of the frame member 30 and penetrate and connect to the frame member 30. Even when it is applied, the vibration energy can be efficiently absorbed by the vibration of the elastic member 32a and the battery cell 20. As a result, an increase in the amplitude of the entire battery module 10 can be efficiently suppressed.

１０ 電池モジュール
１０ａ 電池モジュールの中央部
２０ 電池セル
３０ 枠部材
３０Ａ 第１の枠部材
３０Ｂ 第２の枠部材
３０ａ、３０ｂ 枠部材の両面
３１ 外枠部
３１ａ 上辺
３１ｂ 下片
３１ｃ 右片
３１ｄ 左片
３２ 内側部
３２ａ 弾性部材
３２ｂ 流路形成リブ
３３ 第１の係合部
３４ 第２の係合部
３５ 突出片
３５ａ 段部
３５ｂ 突出片前部
３５ｃ 突出片後部
３５ｄ リブ
４０ 積層体
５０ エンドプレート
５１ 第１のエンドプレート
５２ 第２のエンドプレート
Ｄ 積層体の積層方向 DESCRIPTION OF SYMBOLS 10 Battery module 10a Center part 20 of battery module 20 Battery cell 30 Frame member 30A First frame member 30B Second frame members 30a, 30b Both sides 31 of frame member Outer frame portion 31a Upper side 31b Lower piece 31c Right piece 31d Left piece 32 Inner part 32a Elastic member 32b Flow path forming rib 33 First engaging part 34 Second engaging part 35 Projecting piece 35a Step 35b Projecting piece front 35c Projecting piece rear 35d Rib 40 Stack 50 End plate 51 First End plate 52 Second end plate D Laminating direction of laminate

Claims (7)

電池セルと枠部材とが交互に積層された積層体を有する電池モジュールであって、
前記枠部材は、周方向に連続する外枠部と、該外枠部の内周側にあり少なくとも一部で前記電池セルと接触する内側部と、を有しており、
前記外枠部は、硬質樹脂製であり、
前記内側部には、前記電池セルと接触する範囲に軟質樹脂製の弾性部材が設けられており、
前記積層体の積層方向に隣り合う位置に配置される２つの枠部材の一方である第１の枠部材の外枠部と、前記２つの枠部材の他方である第２の枠部材の外枠部とは、互いに結合されている、電池モジュール。 A battery module having a stacked body in which battery cells and frame members are alternately stacked,
The frame member has an outer frame portion that is continuous in the circumferential direction, and an inner portion that is on the inner circumferential side of the outer frame portion and at least partially contacts the battery cell,
The outer frame portion is made of a hard resin,
The inner portion is provided with an elastic member made of a soft resin in a range in contact with the battery cell,
An outer frame portion of a first frame member that is one of two frame members arranged at positions adjacent to each other in the stacking direction of the laminate, and an outer frame of a second frame member that is the other of the two frame members The parts are battery modules that are connected to each other. 前記第１の枠部材に、爪と爪受けの一方からなる第１の係合部が設けられており、前記第２の枠部材に、前記爪と前記爪受けの他方からなる第２の係合部が設けられており、
前記第１の係合部と前記第２の係合部とを互いに係合させることで、前記第１の枠部材の外枠部と前記第２の枠部材の外枠部とは、互いに結合されている、請求項１記載の電池モジュール。 The first frame member is provided with a first engagement portion formed of one of a claw and a claw receiver, and the second frame member is provided with a second engagement member formed of the other of the claw and the claw receiver. A joint is provided,
By engaging the first engagement portion and the second engagement portion with each other, the outer frame portion of the first frame member and the outer frame portion of the second frame member are connected to each other. The battery module according to claim 1, wherein: 前記第１の枠部材の外枠部に、前記第２の枠部材に接近する方向に延びる突出片が設けられており、該突出片に前記第１の係合部が設けられている、請求項２記載の電池モジュール。   A projecting piece extending in a direction approaching the second frame member is provided on an outer frame portion of the first frame member, and the first engaging portion is provided on the projecting piece. Item 3. The battery module according to Item 2. 前記突出片は、延び方向中間部に設けられる段部と、該段部よりも延び方向先側にある突出片前部と、前記段部よりも延び方向の手前側にあり前記第１の枠部材の外枠部に連なる突出片後部と、を有しており、
前記第１の係合部は、前記突出片前部に設けられている、請求項３記載の電池モジュール。 The protruding piece is a step provided at an intermediate portion in the extending direction, a protruding piece front located on the forward side in the direction extending from the step, and a first frame on the near side in the direction extending from the step. And a protruding piece rear portion connected to the outer frame portion of the member,
4. The battery module according to claim 3, wherein the first engagement portion is provided at a front portion of the protruding piece. 5. 前記第１の枠部材の外枠部から前記突出片後部にわたって連続するリブが設けられている、請求項４記載の電池モジュール。   The battery module according to claim 4, wherein a continuous rib is provided from an outer frame portion of the first frame member to a rear portion of the protruding piece. 前記外枠部は、前記積層体の積層方向から見たときに、前記内側部の上側に位置する上辺と、前記内側部の下側に位置する下片と、前記内側部の右側に位置する右片と、前記内側部の左側に位置する左片と、の４辺を有しており、
前記４辺のそれぞれで、前記第１の枠部材の外枠部と前記第２の枠部材の外枠部とは、互いに結合されている、請求項１〜請求項５のいずれか１項に記載の電池モジュール。 The outer frame portion is located on the upper side of the inner portion, the lower piece located on the lower side of the inner portion, and located on the right side of the inner portion when viewed from the laminating direction of the laminate. It has four sides of a right piece and a left piece located on the left side of the inner part,
The outer frame portion of the first frame member and the outer frame portion of the second frame member are connected to each other at each of the four sides. The battery module according to the above. 前記内側部の弾性部材は、前記枠部材の前記積層方向の両面に設定されており該枠部材を貫通して繋がっている、請求項１〜請求項６のいずれか１項に記載の電池モジュール。   The battery module according to any one of claims 1 to 6, wherein the elastic member of the inner portion is set on both surfaces of the frame member in the laminating direction, and is connected through the frame member. .
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