JP5473558B2 - Battery module - Google Patents

Battery module Download PDF

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JP5473558B2
JP5473558B2 JP2009267200A JP2009267200A JP5473558B2 JP 5473558 B2 JP5473558 B2 JP 5473558B2 JP 2009267200 A JP2009267200 A JP 2009267200A JP 2009267200 A JP2009267200 A JP 2009267200A JP 5473558 B2 JP5473558 B2 JP 5473558B2
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end plate
boss
resin frame
convex rib
recess
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JP2011113706A (en
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和哉 松下
友敬 刑部
貴樹 森岡
豪範 土屋
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Toyota Motor Corp
Kojima Industries Corp
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Toyota Motor Corp
Kojima Industries Corp
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    • 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

Description

本発明は、樹脂枠と電池が交互に積層された積層体と、積層体の積層方向両外側に配置されるエンドプレートと、を有する電池モジュールに関する。   The present invention relates to a battery module having a laminated body in which resin frames and batteries are alternately laminated, and end plates arranged on both outer sides in the laminating direction of the laminated body.

従来、樹脂枠と電池が交互に積層された積層体と、該積層体の積層方向両外側に配置されるエンドプレートと、を有する電池モジュールは、図８〜図１０に示す構造であった。
具体的には、隣接する樹脂枠２の一方２ａに設けられる断面矩形状のボス部７を、隣接する樹脂枠２の他方２ｂに設けられる断面矩形状の凹部８に嵌めることで、隣接する樹脂枠２どうしの、積層体の積層方向と直交する方向の相対位置を決定している。
また、積層体の積層方向両外側に配置されるエンドプレートと該エンドプレートに隣接する樹脂枠２も、隣接するエンドプレートと樹脂枠２の一方に設けられる断面矩形状のボス部７を、隣接するエンドプレートと樹脂枠２の他方に設けられる断面矩形状の凹部８に嵌めることで、積層体の積層方向と直交する方向の相対位置を決定している。 Conventionally, a battery module having a laminated body in which resin frames and batteries are alternately laminated and end plates disposed on both outer sides in the laminating direction of the laminated body has a structure shown in FIGS.
Specifically, the boss portion 7 having a rectangular cross section provided on one side 2a of the adjacent resin frame 2 is fitted into the concave portion 8 having a rectangular cross section provided on the other 2b of the adjacent resin frame 2, thereby adjacent resin. The relative positions of the frames 2 in the direction orthogonal to the stacking direction of the stacked body are determined.
Further, the end plate disposed on both outer sides in the stacking direction of the laminate and the resin frame 2 adjacent to the end plate are also adjacent to the boss portion 7 having a rectangular cross section provided on one of the adjacent end plate and the resin frame 2. The relative position in the direction orthogonal to the stacking direction of the laminate is determined by fitting into the recess 8 having a rectangular cross section provided on the other of the end plate and the resin frame 2.

しかし、従来の電池モジュールには、つぎの問題点がある。
ボス部７を凹部８に嵌めるため、図１１に示すように、ボス部７と凹部８との間には、積層体の積層方向と直交する方向である上下左右方向にそれぞれ若干（たとえば０．０５ｍｍ程度）の隙がある。そのため、互いに隣接する樹脂枠２どうしが相対的に動くことができてしまい、エンドプレートと該エンドプレートに隣接する樹脂枠２とが相対的に動くことができてしまう。そのため、電池モジュールへの力のかかり方によっては、電池モジュール全体がねじれてしまう。電池モジュールがねじれてしまうと、電池モジュールを車両に搭載されるフレームにボルト締結した際にボルトに常に外れる方向の力が働き、車両走行振動等によりボルトが緩んでしまい外れてしまうおそれがある。 However, the conventional battery module has the following problems.
In order to fit the boss portion 7 into the recess 8, as shown in FIG. 11, the boss portion 7 and the recess 8 are slightly spaced in the vertical and horizontal directions (for example,. There is a gap of about 05mm). Therefore, the resin frames 2 adjacent to each other can move relatively, and the end plate and the resin frame 2 adjacent to the end plate can move relatively. Therefore, depending on how the force is applied to the battery module, the entire battery module is twisted. If the battery module is twisted, there is a risk that when the battery module is bolted to the frame mounted on the vehicle, a force is always applied to the bolt so that the bolt loosens due to vehicle running vibration or the like.

特開２００７−１１５４３７号公報JP 2007-115437 A

本発明の目的は、電池モジュールのねじれを従来に比べて抑制できる電池モジュールを提供することにある。   The objective of this invention is providing the battery module which can suppress the twist of a battery module compared with the past.

上記目的を達成する本発明はつぎの通りである。
（１） 樹脂枠と電池が交互に積層された積層体と、前記積層体の積層方向の一側に配置される第１のエンドプレートと、前記積層体の積層方向の他側に配置される第２のエンドプレートと、を有し、
前記樹脂枠と前記第２のエンドプレートの、前記積層体の積層方向の一側面に、前記積層体の積層方向に延びる断面矩形状のボス部が設けられており、前記樹脂枠と前記第１のエンドプレートの、前記積層体の積層方向の他側面に、前記積層体の積層方向に凹む断面矩形状の凹部が設けられており、隣接する前記樹脂枠どうし、前記第１のエンドプレートと該第１のエンドプレートに隣接する樹脂枠、前記第２のエンドプレートと該第２のエンドプレートに隣接する樹脂枠が、それぞれ、前記ボス部を前記凹部に嵌めることで相対位置決めされる、電池モジュールであって、
前記ボス部の表面と前記凹部を形成する壁面の一方に、前記ボス部を前記凹部の下面に押し付ける凸リブが設けられており、
前記凸リブにより、前記樹脂枠の全部と前記第２のエンドプレートの各前記ボス部が、前記樹脂枠の全部と前記第１のエンドプレートの各前記凹部の前記下面に、それぞれ、押し付けられている、電池モジュール。 The present invention for achieving the above object is as follows.
(1) A laminated body in which resin frames and batteries are alternately laminated, a first end plate arranged on one side in the lamination direction of the laminated body, and arranged on the other side in the lamination direction of the laminated body. A second end plate;
A boss portion having a rectangular cross section extending in the stacking direction of the stacked body is provided on one side surface of the stacked body of the resin frame and the second end plate, and the resin frame and the first end plate are provided. A recess having a rectangular cross section that is recessed in the stacking direction of the laminate is provided on the other side surface of the end plate in the stacking direction of the stack, and the adjacent resin frames, the first end plate and the first end plate A battery module adjacent to the first end plate, and the second end plate and the resin frame adjacent to the second end plate are relatively positioned by fitting the boss portion into the recess, respectively. Because
One of the surface of the boss portion and the wall surface forming the recess is provided with a convex rib that presses the boss portion against the lower surface of the recess,
The convex ribs press the entire resin frame and the boss portions of the second end plate against the entire bottom surface of the resin frame and the concave portions of the first end plate, respectively. The battery module.

上記（１）の電池モジュールによれば、ボス部の表面と凹部を形成する壁面の一方に、ボス部を凹部の一面に押し付ける凸リブが設けられているため、ボス部と凹部との間にボス部を凹部に嵌めるための隙があっても、ボス部が凹部内で動いてしまうことを抑制でき、凹部に嵌まっているボス部が凸リブにより常に凹部の一面に押し付けられた状態になる。そのため、電池モジュールがねじれてしまうことを抑制できる。   According to the battery module of (1) above, since the convex rib that presses the boss portion against one surface of the concave portion is provided on one of the surface of the boss portion and the wall surface forming the concave portion, the gap between the boss portion and the concave portion is provided. Even if there is a gap for fitting the boss into the recess, the boss can be prevented from moving in the recess, and the boss fitted in the recess is always pressed against one surface of the recess by the convex rib. Become. Therefore, it can suppress that a battery module will be twisted.

本発明実施例の電池モジュールの、積層体の樹脂枠の正面図である。It is a front view of the resin frame of the laminated body of the battery module of this invention Example. 本発明実施例の電池モジュールの、隣接する樹脂枠の一方に設けられるボス部を隣接する樹脂枠の他方に設けられる凹部に嵌めたときの、図１のＡ−Ａ部位における拡大断面図である。It is an expanded sectional view in the AA section of Drawing 1 when a boss part provided in one of adjacent resin frames of a battery module of an example of the present invention is fitted in a crevice provided in the other of an adjacent resin frame. . 本発明実施例の電池モジュールの、隣接する樹脂枠の一方に設けられるボス部を隣接する樹脂枠の他方に設けられる凹部に嵌めたときの、図１のＢ−Ｂ部位における拡大断面図である。It is an expanded sectional view in the BB section of Drawing 1 when a boss part provided in one of adjacent resin frames of a battery module of the present invention example is fitted in a crevice provided in the other of the adjacent resin frames. . 本発明実施例の電池モジュールの、凸リブがボス部に設けられている場合の、ボス部と凹部との位置関係を示す拡大断面模式図である。It is an expanded sectional schematic diagram which shows the positional relationship of a boss | hub part and a recessed part in case the convex rib is provided in the boss | hub part of the battery module of this invention Example. 本発明実施例の電池モジュールの、凸リブがボス部に設けられている場合の、ボス部の拡大斜視図である。It is an expansion perspective view of a boss | hub part in case the convex rib is provided in the boss | hub part of the battery module of this invention Example. 本発明実施例の電池モジュールの、凸リブが凹部に設けられている場合の、ボス部と凹部との位置関係を示す拡大断面模式図である。It is an expanded sectional schematic diagram which shows the positional relationship of a boss | hub part and a recessed part in case the convex rib is provided in the recessed part of the battery module of this invention Example. 本発明実施例の電池モジュールの、部品構成斜視図である。It is a component structure perspective view of the battery module of this invention Example. 従来の電池モジュールの、積層体の樹脂枠の正面図である。It is a front view of the resin frame of the laminated body of the conventional battery module. 従来の電池モジュールの、隣接する樹脂枠の一方に設けられるボス部を隣接する樹脂枠の他方に設けられる凹部に嵌めたときの、図８のＣ−Ｃ部位における拡大断面図である。It is an expanded sectional view in CC section of Drawing 8 when a boss part provided in one of adjacent resin frames of a conventional battery module is fitted in a crevice provided in the other of the adjacent resin frames. 従来の電池モジュールの、隣接する樹脂枠の一方に設けられるボス部を隣接する樹脂枠の他方に設けられる凹部に嵌めたときの、図８のＤ−Ｄ部位における拡大断面図である。It is an expanded sectional view in the DD section of Drawing 8, when the boss part provided in one of the adjacent resin frames of the conventional battery module is fitted in the crevice provided in the other of the adjacent resin frames. 従来の電池モジュールの、ボス部と凹部との位置関係を示す拡大断面模式図である。It is an expanded sectional schematic diagram which shows the positional relationship of the boss | hub part and a recessed part of the conventional battery module.

以下に、本発明の電池モジュールを、図１〜図７を参照して説明する。
本発明実施例の電池モジュール１０は、図７に示すように、樹脂枠（樹脂プレート）２０と発熱体である電池３０が交互に積層された積層体４０と、エンドプレート５０と、拘束バンド６０と、ボス部７０と、凹部８０と、図４に示すように、凸リブ９０と、を有する。 Below, the battery module of this invention is demonstrated with reference to FIGS.
As shown in FIG. 7, the battery module 10 according to the embodiment of the present invention includes a laminated body 40 in which a resin frame (resin plate) 20 and a battery 30 as a heating element are alternately laminated, an end plate 50, and a restraining band 60. And a boss 70, a recess 80, and a convex rib 90 as shown in FIG.

樹脂枠２０は、絶縁材（たとえばポリプロピレン製）からなる。樹脂枠２０は、射出成形品であり一部品構成である。樹脂枠２０は、図１に示すように、ほぼ正面視矩形の板状である。樹脂枠２０は、本体部２１と、突出部２２と、を備える。   The resin frame 20 is made of an insulating material (for example, made of polypropylene). The resin frame 20 is an injection-molded product and has a one-part configuration. As shown in FIG. 1, the resin frame 20 has a substantially rectangular plate shape when viewed from the front. The resin frame 20 includes a main body portion 21 and a protruding portion 22.

本体部２１は、表裏面（積層体４０の積層方向両側面）に、電池３０と接触する接触部２１ａを備える。接触部２１ａは、樹脂枠２０の正面視で（積層体４０の積層方向から見たとき）、樹脂枠２０の中央部とその近傍にある。接触部２１ａの表裏一側面は、図７に示すように、凹凸面とされており該面と対向する位置にある電池３０との間に冷媒流路を形成している。接触部２１ａの表裏他側面は、図１に示すように、平面とされており該面と対向する位置にある電池３０と面接触する。ただし、接触部２１ａの表裏他側面も、接触部２１ａの表裏一側面と同様に凹凸面とされていてもよい。   The main body 21 includes contact portions 21 a that come into contact with the battery 30 on the front and back surfaces (both side surfaces in the stacking direction of the stacked body 40). The contact portion 21a is in the central portion of the resin frame 20 and in the vicinity thereof when viewed from the front of the resin frame 20 (when viewed from the stacking direction of the stacked body 40). As shown in FIG. 7, the front and back side surfaces of the contact portion 21a are uneven surfaces, and a refrigerant flow path is formed between the contact portion 21a and the battery 30 at a position facing the surface. As shown in FIG. 1, the front and back other side surfaces of the contact portion 21 a are flat and come into surface contact with the battery 30 at a position facing the surface. However, the front and back other side surfaces of the contact portion 21a may be uneven as well as the front and back side surfaces of the contact portion 21a.

突出部２２は、本体部２１の側面下端部またはその近傍に設けられる。突出部２２は、上下方向および積層体４０の積層方向と直交する方向（左右方向）に、本体部２１から突出している。突出部２２は、本体部２１の両側に設けられる。突出部２２は、剛性を有し、弾性変形しないかまたは弾性変形しても無視できる程度とされている。 The protrusion 22 is provided at the lower end of the side surface of the main body 21 or in the vicinity thereof. The protruding portion 22 protrudes from the main body portion 21 in the vertical direction and in a direction (left-right direction) orthogonal to the stacking direction of the stacked body 40. The protruding portions 22 are provided on both sides of the main body portion 21. The protrusion 22 has rigidity and does not elastically deform or is negligible even when elastically deformed.

電池３０は、図７に示すように、上部に設けられる端子を除いて、ほぼ正面視矩形の板状である。電池３０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３０は直列接続されている。   As shown in FIG. 7, the battery 30 has a substantially rectangular plate shape when viewed from the front, except for the terminals provided at the top. The battery 30 is a secondary battery such as a lithium ion battery or a nickel metal hydride battery. Each battery 30 is connected in series.

エンドプレート５０は、積層体４０の積層方向の両外側に配置されている。エンドプレート５０は、積層体４０の積層方向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を積層体４０の積層方向両側から挟んでいる。 The end plates 50 are disposed on both outer sides of the stacked body 40 in the stacking direction. The end plate 50 includes a first end plate 51 disposed on one side in the stacking direction of the stacked body 40 and a second end plate 52 disposed on the other side in the stacking direction of the stacked body 40. The first end plate 51 and the second end plate 52 sandwich the stacked body 40 from both sides in the stacking direction of the stacked body 40.

拘束バンド６０は、積層体４０の積層方向に延びている。拘束バンド６０の延び方向各端部は、第１のエンドプレート５１と第２のエンドプレート５２とに、それぞれ、ビス、ボルト６１等を用いて結合されている。拘束バンド６０は、たとえば金属製である。拘束バンド６０は、拘束バンド６０を絶縁材（たとえばポリプロピレン製）からなる樹脂部材６２で覆う、拘束バンド６０と電池３０との間に絶縁材（たとえばポリプロピレン製）からなる樹脂トレイ６３を配置する、等により、電池３０と絶縁されている。 The restraint band 60 extends in the stacking direction of the stacked body 40. End portions of the restraining band 60 in the extending direction are coupled to the first end plate 51 and the second end plate 52 using screws, bolts 61, and the like, respectively. The restraint band 60 is made of metal, for example. The restraining band 60 covers the restraining band 60 with a resin member 62 made of an insulating material (for example, made of polypropylene), and a resin tray 63 made of an insulating material (for example, made of polypropylene) is disposed between the restraining band 60 and the battery 30. Etc., and is insulated from the battery 30.

ボス部７０は、樹脂枠２０と第２のエンドプレート５２の、積層体４０の積層方向の一側面に、該面から積層体４０の積層方向一側に突出して設けられる。ボス部７０のうち樹脂枠２０に設けられるボス部は、突出部２２の突出方向中間部に設けられる。
ボス部７０の、積層体４０の積層方向と直交する面で切断したときの断面形状（ボス部７０の突出方向と直交する面で切断したときの断面形状、横断面形状）は、断面矩形状（四隅がＲ形状とされたものを含む）である。ボス部７０は、剛性を有し、弾性変形しないかまたは弾性変形しても無視できる程度とされている。 The boss portion 70 is provided on one side surface of the resin frame 20 and the second end plate 52 in the stacking direction of the stacked body 40 so as to protrude from the surface to one side in the stacking direction of the stacked body 40. Among the boss portions 70, the boss portion provided on the resin frame 20 is provided in the intermediate portion in the protruding direction of the protruding portion 22.
The cross-sectional shape when the boss 70 is cut along a plane orthogonal to the stacking direction of the stacked body 40 (the cross-sectional shape and the cross-sectional shape when cut along the plane orthogonal to the protruding direction of the boss 70) is a rectangular cross section. (Including those in which the four corners are rounded). The boss portion 70 has rigidity and does not elastically deform or is negligible even when elastically deformed.

凹部８０は、樹脂枠２０と第１のエンドプレート５１の、積層体４０の積層方向の他側面に、該他側面から積層体４０の積層方向に凹んで設けられる。凹部８０のうち樹脂枠２０に設けられる凹部は、突出部２２の突出方向中間部に設けられており、樹脂枠２０に設けられるボス部７０の背面側に設けられている。凹部８０の、積層体４０の積層方向と直交する面で切断したときの断面形状（横断面形状）は、断面矩形状（四隅がＲ形状とされたものを含む）である。凹部８０の深さは、図２、図３に示すように、ボス部７０の突出量より大とされており、凹部８０に嵌まるボス部７０が凹部８０に底付きしないようになっている。   The recess 80 is provided on the other side of the resin frame 20 and the first end plate 51 in the stacking direction of the stacked body 40 so as to be recessed from the other side in the stacking direction of the stacked body 40. Of the recesses 80, the recesses provided in the resin frame 20 are provided in the middle of the protrusions 22 in the protruding direction, and are provided on the back side of the bosses 70 provided in the resin frame 20. The cross-sectional shape (transverse cross-sectional shape) when the recess 80 is cut along a plane orthogonal to the stacking direction of the stacked body 40 is a rectangular cross-sectional shape (including those in which the four corners are R-shaped). As shown in FIGS. 2 and 3, the depth of the concave portion 80 is larger than the protruding amount of the boss portion 70, and the boss portion 70 that fits into the concave portion 80 does not bottom the concave portion 80. .

図７に示すように、隣接する樹脂枠２０，２０どうしは、隣接する樹脂枠２０の一方に設けられるボス部７０を、隣接する樹脂枠２０の他方に設けられる凹部８０に嵌めることで、積層体４０の積層方向と直交する方向（上下および左右方向）に相対位置決めされる。
第１のエンドプレート５１と、樹脂枠２０のうち第１のエンドプレート５１に隣接する樹脂枠２０ａとは、樹脂枠２０ａに設けられるボス部７０を第１のエンドプレート５１に設けられる凹部８０に嵌めることで、積層体４０の積層方向と直交する方向に相対位置決めされる。
第２のエンドプレート５２と、樹脂枠２０のうち第２のエンドプレート５２に隣接する樹脂枠２０ｂとは、第２のエンドプレート５２に設けられるボス部７０を樹脂枠２０ｂの凹部８０に嵌めることで、積層体４０の積層方向と直交する方向に相対位置決めされる。 As shown in FIG. 7, the adjacent resin frames 20 and 20 are laminated by fitting a boss portion 70 provided on one side of the adjacent resin frame 20 into a recess 80 provided on the other side of the adjacent resin frame 20. Relative positioning is performed in directions (vertical and horizontal directions) orthogonal to the stacking direction of the bodies 40.
The first end plate 51 and the resin frame 20a of the resin frame 20 adjacent to the first end plate 51 are formed by replacing the boss portion 70 provided on the resin frame 20a with the recess 80 provided on the first end plate 51. By fitting, relative positioning is performed in a direction orthogonal to the stacking direction of the stacked body 40.
The second end plate 52 and the resin frame 20b adjacent to the second end plate 52 in the resin frame 20 are configured to fit the boss portion 70 provided on the second end plate 52 into the recess 80 of the resin frame 20b. Thus, relative positioning is performed in a direction orthogonal to the stacking direction of the stacked body 40.

ボス部７０が凹部８０に嵌まるため、ボス部７０と凹部８０との間には、積層体４０の積層方向と直交する方向である上下左右にそれぞれ若干（たとえば０．０５ｍｍ程度）の隙がある。そのため、互いに隣接する樹脂枠２０どうしが相対的に動くことができてしまい、第１のエンドプレート５１と該第１のエンドプレート５１に隣接する樹脂枠２０ａとが相対的に動くことができてしまい、第２のエンドプレート５２と該第２のエンドプレート５２に隣接する樹脂枠２０ｂとが相対的に動くことができてしまう。
これらの相対動を抑制するために、凸リブ９０が設けられている。 Since the boss part 70 fits into the recess 80, there is a slight gap (for example, about 0.05 mm) between the boss part 70 and the recess 80 on the top, bottom, left, and right, which is the direction orthogonal to the stacking direction of the laminate 40. is there. For this reason, the resin frames 20 adjacent to each other can move relatively, and the first end plate 51 and the resin frame 20a adjacent to the first end plate 51 can move relatively. Therefore, the second end plate 52 and the resin frame 20b adjacent to the second end plate 52 can move relatively.
In order to suppress these relative movements, a convex rib 90 is provided.

凸リブ９０は、図４または図６に示すように、ボス部７０と凹部８０のいずれか一方の上面に一体に設けられる。凸リブ９０は、自身がつぶれることで、凹部８０に嵌まっているボス部７０を凹部８０の下面に押し付けてボス部７０を常に凹部８０の下面に面接触させる。   As shown in FIG. 4 or FIG. 6, the convex rib 90 is integrally provided on the upper surface of one of the boss portion 70 and the concave portion 80. When the convex rib 90 is crushed, the boss portion 70 fitted in the concave portion 80 is pressed against the lower surface of the concave portion 80 so that the boss portion 70 is always in surface contact with the lower surface of the concave portion 80.

凸リブ９０は、凸リブ９０が設けられる面に１個のみ設けられる。凸リブ９０は、図５に示すように、凸リブ９０が設けられる面の、積層体４０の積層方向の全体にわたって設けられている。凸リブ９０は、凸リブ９０が設けられる面の、上下方向および積層体４０の積層方向と直交する方向である幅方向中央部に、設けられている。
凸リブ９０は、凸リブ９０が設けられる面から上下方向に突出して設けられている。凸リブ９０の、凸リブ９０が設けられる面からの上下方向の突出量は、たとえば０．２ｍｍとされており、ボス部７０と凹部８０との間の上下方向隙間（０．０５×２＝０．１ｍｍ）よりも大とされている。凸リブ９０は、凸リブ９０が設けられる面からの突出方向先端にいくにしたがって先細りする、横断面先細り形状とされている。凸リブ９０の横断面形状は、特に限定するものではないが、三角形、弾丸形状などである。 Only one convex rib 90 is provided on the surface where the convex rib 90 is provided. As shown in FIG. 5, the convex rib 90 is provided over the entire stacking direction of the stacked body 40 on the surface on which the convex rib 90 is provided. The convex rib 90 is provided at the center in the width direction, which is a direction perpendicular to the vertical direction and the stacking direction of the stacked body 40 on the surface on which the convex rib 90 is provided.
The convex rib 90 is provided so as to protrude in the vertical direction from the surface on which the convex rib 90 is provided. The protruding amount of the convex rib 90 in the vertical direction from the surface on which the convex rib 90 is provided is, for example, 0.2 mm, and the vertical gap between the boss portion 70 and the concave portion 80 (0.05 × 2 = 0.1 mm). The convex rib 90 has a cross-sectional taper shape that tapers toward the front end in the protruding direction from the surface on which the convex rib 90 is provided. The cross-sectional shape of the convex rib 90 is not particularly limited, but may be a triangle or a bullet shape.

次に、本発明実施例の作用を説明する。
本発明実施例では、ボス部７０の上面と凹部８０の上面の一方に、ボス部７０をボス部７０が嵌まっている凹部８０の下面に押し付ける凸リブ９０が設けられているため、ボス部７０と凹部８０との間にボス部７０を凹部８０に嵌めるための隙があっても、ボス部７０が凹部８０内で動いてしまうことを抑制でき、凹部８０に嵌まっているボス部７０が凸リブ９０により常に凹部８０の下面に押し付けられた状態になる。そのため、電池モジュール１０がねじれてしまうことを従来に比べて抑制できる。
また、凸リブ９０によりボス部７０が凹部８０の下面に押し付けられた状態になるため、凹部８０の下面を基準面と考えたとき、全樹脂枠２０と第２のエンドプレート５２の各ボス部７０を、全樹脂枠２０と第１のエンドプレート５１の各凹部８０の基準面にそれぞれ押し当てることができる。 Next, the operation of the embodiment of the present invention will be described.
In the embodiment of the present invention, a convex rib 90 is provided on one of the upper surface of the boss portion 70 and the upper surface of the concave portion 80 to press the boss portion 70 against the lower surface of the concave portion 80 in which the boss portion 70 is fitted. Even if there is a gap for fitting the boss 70 into the recess 80 between the recess 70 and the recess 80, the boss 70 can be prevented from moving in the recess 80, and the boss 70 fitted in the recess 80. Is always pressed against the lower surface of the recess 80 by the convex rib 90. Therefore, it can suppress that the battery module 10 twists compared with the past.
Further, since the boss portion 70 is pressed against the lower surface of the concave portion 80 by the convex rib 90, each boss portion of the entire resin frame 20 and the second end plate 52 is considered when the lower surface of the concave portion 80 is considered as a reference surface. 70 can be pressed against the reference surfaces of all the resin frames 20 and the respective recesses 80 of the first end plate 51.

凸リブ９０が、ボス部７０と凹部８０のいずれか一方の上面に設けられるため、凸リブ９０がボス部７０と凹部８０のいずれか一方の側面（上下方向に延びる面）に設けられる場合に比べて、電池モジュール１０がねじれてしまうことを効果的に抑制できる。   Since the convex rib 90 is provided on the upper surface of one of the boss part 70 and the concave part 80, the convex rib 90 is provided on one side surface (a surface extending in the vertical direction) of the boss part 70 or the concave part 80. In comparison, the battery module 10 can be effectively prevented from being twisted.

凸リブ９０が凸リブ９０が設けられる面に１個のみ設けられるため、凸リブ９０が凸リブ９０が設けられる面に複数設けられる場合に比べて、ボス部７０の凹部８０への挿入荷重を低くすることができ、ボス部７０を凹部８０に容易に挿入する（嵌める）ことができる。   Since only one convex rib 90 is provided on the surface where the convex rib 90 is provided, the insertion load to the concave portion 80 of the boss portion 70 is smaller than when a plurality of convex ribs 90 are provided on the surface where the convex rib 90 is provided. The boss portion 70 can be easily inserted (fitted) into the recess 80.

凸リブ９０が、凸リブ９０が設けられる面の、積層体４０の積層方向の全体にわたって設けられているため、ボス部７０の全体を確実に凹部８０の下面に押し付け面接触させることができる。 Since the convex rib 90 is provided over the entire surface of the stacked body 40 in the stacking direction of the surface on which the convex rib 90 is provided, the entire boss portion 70 can be reliably pressed against the lower surface of the concave portion 80.

凸リブ９０が、凸リブ９０が設けられる面の、上下方向および積層体４０の積層方向と直交する方向である幅方向中央部に設けられているため、ボス部７０が凹部８０内で傾いてしまうことを抑制できる。 Since the convex rib 90 is provided in the central portion in the width direction, which is the direction perpendicular to the vertical direction and the stacking direction of the stacked body 40, the boss portion 70 is inclined in the concave portion 80. Can be suppressed.

凸リブ９０の、凸リブ９０が設けられる面からの上下方向の突出量が、ボス部７０と凹部８０との間の上下方向隙間よりも大とされているため、確実に凸リブ９０がつぶれ、凸リブ９０で確実にボス部７０を凹部８０の下面に押し付け面接触させることができる。 Since the protruding amount of the convex rib 90 in the vertical direction from the surface on which the convex rib 90 is provided is larger than the vertical gap between the boss portion 70 and the concave portion 80, the convex rib 90 is reliably crushed. The boss portion 70 can be reliably pressed against the lower surface of the concave portion 80 by the convex rib 90 and brought into surface contact.

凸リブ９０が、凸リブ９０が設けられる面からの突出方向先端にいくにしたがって先細りする、横断面先細り形状とされているため、凸リブ９０の横断面形状が、四角形以上の多角形形状、半円形、半楕円形等である場合に比べて、軽い力で凸リブ９０をつぶすことができる。 Since the convex rib 90 has a tapered cross-sectional shape that tapers toward the tip in the protruding direction from the surface on which the convex rib 90 is provided, the convex rib 90 has a polygonal shape that is a quadrilateral or more. The convex rib 90 can be crushed with a light force as compared with a semicircular shape, a semi-elliptical shape, and the like.

本発明実施例及び図示例では、ボス部７０の上面と凹部８０の上面の一方に凸リブ９０が設けられている場合を示したが、凸リブ９０は、ボス部７０の下面と凹部８０の下面の一方に設けられてボス部７０を凹部８０の上面に押し付けるようになっていてもよく、ボス部７０の左右一側面と凹部８０の左右一側面の一方に設けられてボス部７０を凹部８０の左右他側面に押し付けるようになっていてもよい。すなわち、凸リブ９０は、ボス部７０の表面と凹部８０を形成する壁面の一方に設けられて、ボス部７０を凹部８０の一面に押し付けるようになっていればよい。 In the embodiment of the present invention and the illustrated example, the case where the convex rib 90 is provided on one of the upper surface of the boss portion 70 and the upper surface of the concave portion 80 is shown. The boss portion 70 may be provided on one of the lower surfaces so as to press the boss portion 70 against the upper surface of the concave portion 80. The boss portion 70 is provided on one of the left and right side surfaces of the boss portion 70 and the left and right side surfaces of the concave portion 80. It may be configured to press against the left and right other sides of 80. That is, the convex rib 90 may be provided on one of the surface of the boss portion 70 and the wall surface forming the concave portion 80 so as to press the boss portion 70 against one surface of the concave portion 80.

１０ 電池モジュール
２０，２０ａ、２０ｂ 樹脂枠
３０ 電池
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
６０ 拘束バンド
７０ ボス部
８０ 凹部
９０ 凸リブ DESCRIPTION OF SYMBOLS 10 Battery module 20, 20a, 20b Resin frame 30 Battery 40 Laminate 50 End plate 51 1st end plate 52 2nd end plate 60 Restraint band 70 Boss part 80 Recessed part 90 Convex rib

Claims (1)

樹脂枠と電池が交互に積層された積層体と、前記積層体の積層方向の一側に配置される第１のエンドプレートと、前記積層体の積層方向の他側に配置される第２のエンドプレートと、を有し、
前記樹脂枠と前記第２のエンドプレートの、前記積層体の積層方向の一側面に、前記積層体の積層方向に延びる断面矩形状のボス部が設けられており、前記樹脂枠と前記第１のエンドプレートの、前記積層体の積層方向の他側面に、前記積層体の積層方向に凹む断面矩形状の凹部が設けられており、隣接する前記樹脂枠どうし、前記第１のエンドプレートと該第１のエンドプレートに隣接する樹脂枠、前記第２のエンドプレートと該第２のエンドプレートに隣接する樹脂枠が、それぞれ、前記ボス部を前記凹部に嵌めることで相対位置決めされる、電池モジュールであって、
前記ボス部の表面と前記凹部を形成する壁面の一方に、前記ボス部を前記凹部の下面に押し付ける凸リブが設けられており、
前記凸リブにより、前記樹脂枠の全部と前記第２のエンドプレートの各前記ボス部が、前記樹脂枠の全部と前記第１のエンドプレートの各前記凹部の前記下面に、それぞれ、押し付けられている、電池モジュール。 A laminated body in which resin frames and batteries are alternately laminated, a first end plate arranged on one side in the lamination direction of the laminated body, and a second arranged on the other side in the lamination direction of the laminated body An end plate, and
A boss portion having a rectangular cross section extending in the stacking direction of the stacked body is provided on one side surface of the stacked body of the resin frame and the second end plate, and the resin frame and the first end plate are provided. A recess having a rectangular cross section that is recessed in the stacking direction of the laminate is provided on the other side surface of the end plate in the stacking direction of the stack, and the adjacent resin frames, the first end plate and the first end plate A battery module adjacent to the first end plate, and the second end plate and the resin frame adjacent to the second end plate are relatively positioned by fitting the boss portion into the recess, respectively. Because
One of the surface of the boss portion and the wall surface forming the recess is provided with a convex rib that presses the boss portion against the lower surface of the recess,
The convex ribs press the entire resin frame and the boss portions of the second end plate against the entire bottom surface of the resin frame and the concave portions of the first end plate, respectively. The battery module.
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