JP2015090798A - Battery pack - Google Patents

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JP2015090798A
JP2015090798A JP2013230280A JP2013230280A JP2015090798A JP 2015090798 A JP2015090798 A JP 2015090798A JP 2013230280 A JP2013230280 A JP 2013230280A JP 2013230280 A JP2013230280 A JP 2013230280A JP 2015090798 A JP2015090798 A JP 2015090798A
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stacked body
case
restraint
stacking direction
battery pack
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正浩 今井
Masahiro Imai
正浩 今井
康成 高内
Yasunari Takauchi
康成 高内
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Kojima Industries Corp
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Kojima Press Industry Co Ltd
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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

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Abstract

PROBLEM TO BE SOLVED: To provide a battery pack capable of achieving at least either capable of reducing the number of components or reducing a physique in comparison with before.SOLUTION: Since a lower case 31 extends in the lamination direction D of a laminate 21 on the lower side of the laminate 21 and a binding band lower portions 31a fixed to a pair of end plates 22, 22 are equipped therewith, two binding band lower portions which are conventionally required become unnecessary. Consequently, the number of components can be reduced in comparison with before, therefore, advantageous in cost. Moreover, since an arrangement space of two binding band lower portions can be eliminated in comparison with before, the physique in the upper and lower directions of the battery pack can be reduced and the physique in the lower and upper directions of the battery stack can be reduced in comparison with before.

Description

本発明は、電池スタックと該電池スタックを収容するケースとを有する電池パックに関する。   The present invention relates to a battery pack having a battery stack and a case for housing the battery stack.

特開２００１−３５４０３９号公報は、図３、図４に示すように、電池スタック２と、ケース３と、を有する電池パック１を開示している。
電池スタック２は、角型電池２ａ１の積層体２ａと、積層体２ａの積層方向の両側に配置される一対のエンドプレート２ｂ、２ｂと、積層体２ａの上側で積層体２ａの積層方向に延びて設けられる２本の拘束バンドアッパ２ｃ、２ｃと、積層体２ａの下側で積層体２ａの積層方向に延びて設けられる２本の拘束バンドロア２ｄ、２ｄと、を備える。
ケース３は、電池スタック２を収容しており、ロアケース３ａとアッパケース３ｂとからなる。 JP 2001-354039 A discloses a battery pack 1 having a battery stack 2 and a case 3 as shown in FIGS. 3 and 4.
The battery stack 2 includes a stacked body 2a of the square batteries 2a1, a pair of end plates 2b and 2b disposed on both sides in the stacking direction of the stacked body 2a, and extends in the stacking direction of the stacked body 2a on the upper side of the stacked body 2a. And two restraining band lowers 2d and 2d provided to extend in the stacking direction of the laminate 2a below the laminate 2a.
The case 3 accommodates the battery stack 2 and includes a lower case 3a and an upper case 3b.

しかし、上記公報開示の電池パック１には、積層体２ａの上下に２本ずつ拘束バンド２ｃ、２ｄを要するため、つぎの問題点がある。
（ａ）部品点数が多い。そのため、コスト上不利である。
（ａ）電池スタック２の体格が大きくなり、電池パック１の体格が大きくなる。 However, since the battery pack 1 disclosed in the above publication requires two restraining bands 2c and 2d on the top and bottom of the laminate 2a, there is the following problem.
(A) The number of parts is large. Therefore, it is disadvantageous in terms of cost.
(A) The size of the battery stack 2 is increased, and the size of the battery pack 1 is increased.

特開２００１−３５４０３９号公報JP 2001-354039 A

本発明の目的は、従来に比べて、部品点数を削減できる、体格を低減できる、の少なくとも一方を達成できる電池パックを提供することにある。   An object of the present invention is to provide a battery pack that can achieve at least one of reducing the number of parts and reducing the physique as compared with the prior art.

上記目的を達成する本発明はつぎの通りである。
（１） 電池スタックと、ケースと、を有し、
前記電池スタックは、角型の電池を複数積層してなる積層体と、該積層体の積層方向の両側に配置される一対のエンドプレートと、前記積層体の上側で該積層体の積層方向に延びて設けられており延び方向両端部で前記一対のエンドプレートに固定される拘束バンドアッパと、を備えており、
前記ケースは、前記電池スタックを支持するロアケースと、該ロアケースに取付けられるアッパケースと、を備えており、前記電池スタックを収容しており、
前記ロアケースは、前記積層体の下側で該積層体の積層方向に延びており前記一対のエンドプレートに固定される拘束バンドロア部を備えている、電池パック。
（２） 前記拘束バンドアッパと、前記拘束バンドロア部を備える前記ロアケースとにより、前記積層体に前記積層方向に拘束荷重がかけられた状態が保持されている、（１）記載の電池パック。 The present invention for achieving the above object is as follows.
(1) having a battery stack and a case;
The battery stack includes a stacked body in which a plurality of rectangular batteries are stacked, a pair of end plates disposed on both sides in the stacking direction of the stacked body, and in the stacking direction of the stacked body on the upper side of the stacked body. A constraining band upper that is extended and fixed to the pair of end plates at both ends in the extending direction;
The case includes a lower case that supports the battery stack, and an upper case that is attached to the lower case, and accommodates the battery stack,
The lower case includes a constraining band lower portion that extends in a stacking direction of the stacked body below the stacked body and is fixed to the pair of end plates.
(2) The battery pack according to (1), wherein a state in which a restraint load is applied to the stacked body in the stacking direction is maintained by the restraint band upper and the lower case including the restraint band lower portion.

上記（１）の電池パックによれば、ロアケースが、積層体の下側で積層体の積層方向に延びており一対のエンドプレートに固定される拘束バンドロア部を備えているため、従来要していた２本の拘束バンドロアが不要になる。そのため、従来に比べて部品点数を削減でき、コスト上有利である。また、従来に比べて２本の拘束バンドロアの配設スペースを無くすことができるため、従来に比べて電池スタックの上下方向の体格を低減でき、電池パックの上下方向の体格を低減できる。 According to the battery pack of (1), since the lower case includes the restraining band lower portion that extends in the stacking direction of the stack and is fixed to the pair of end plates, it is necessary conventionally. Two restraint band lowers are not required. Therefore, the number of parts can be reduced as compared with the prior art, which is advantageous in terms of cost. In addition, since the space for disposing two restraint band lowers can be eliminated as compared with the prior art, the vertical physique of the battery stack can be reduced and the vertical physique of the battery pack can be reduced.

上記（２）の電池パックによれば、拘束バンドアッパと、拘束バンドロア部を備えるロアケースとにより、積層体に積層方向に拘束荷重がかけられた状態が保持されているため、拘束バンドアッパとロアケースのみで積層体に積層方向に拘束荷重がかけられた状態を保持できる。 According to the battery pack of the above (2), the restraint band upper and the lower case include the restraint band upper and the lower case having the restraint band lower portion. The state where the restraint load is applied to the laminated body in the laminating direction can be maintained only by the above.

本発明実施例の電池パックの、アッパケースを省略した状態の概略斜視図である。It is a schematic perspective view of the battery pack according to the embodiment of the present invention with the upper case omitted. 本発明実施例の電池パックの拡大断面図である。ただし、図面の明瞭化のために電池の断面表示は省略している。It is an expanded sectional view of the battery pack of an example of the present invention. However, the cross-sectional display of the battery is omitted for clarity of the drawing. 従来の電池パックの分解斜視図である。It is a disassembled perspective view of the conventional battery pack. 従来の電池パックの断面図である。It is sectional drawing of the conventional battery pack.

以下に、本発明実施例の電池パックを、図面を参照して説明する。
本発明実施例の電池パック１０は、たとえばハイブリッド自動車、電池自動車等に搭載される。電池パック１０は、図２に示すように、電池スタック２０と、ケース３０と、を有する。 Below, the battery pack of an Example of this invention is demonstrated with reference to drawings.
The battery pack 10 according to the embodiment of the present invention is mounted on, for example, a hybrid vehicle, a battery vehicle, or the like. As shown in FIG. 2, the battery pack 10 includes a battery stack 20 and a case 30.

電池スタック２０は、図１に示すように、積層体２１と、一対のエンドプレート２２，２２と、拘束バンドアッパ２３と、を備える。   As shown in FIG. 1, the battery stack 20 includes a stacked body 21, a pair of end plates 22 and 22, and a restraining band upper 23.

積層体２１は、角型の電池２１ａを複数積層してなる。以下、積層体２１の積層方向（電池２１ａの積層される方向）を積層方向Ｄという。各電池２１ａは、二次電池であり、たとえばリチウムイオン電池である。各電池２１ａの上面２１ｂには、図示略のプラスとマイナスの端子が設けられている。
一対のエンドプレート２２、２２は、積層体２１の積層方向の両外側に配置されている。エンドプレート２２は、金属製である。 The stacked body 21 is formed by stacking a plurality of rectangular batteries 21a. Hereinafter, the stacking direction of the stacked body 21 (direction in which the batteries 21a are stacked) is referred to as a stacking direction D. Each battery 21a is a secondary battery, for example, a lithium ion battery. On the upper surface 21b of each battery 21a, positive and negative terminals (not shown) are provided.
The pair of end plates 22, 22 are arranged on both outer sides in the stacking direction of the stacked body 21. The end plate 22 is made of metal.

拘束バンドアッパ２３は、少なくとも１本設けられている。なお、図示例では、１本のみ設けられる場合を示している。拘束バンドアッパ２３は、積層体２１の上側で積層体２１の積層方向Ｄに延びて設けられている。拘束バンドアッパ２３は、拘束バンドアッパ２３の延び方向両端部で一対のエンドプレート２２，２２にボルト等を用いて固定して取付けられる。 At least one restraining band upper 23 is provided. In the illustrated example, only one is shown. The restraining band upper 23 is provided on the upper side of the stacked body 21 so as to extend in the stacking direction D of the stacked body 21. The restraining band upper 23 is fixedly attached to the pair of end plates 22, 22 using bolts or the like at both ends in the extending direction of the restraining band upper 23.

拘束バンドアッパ２３は、たとえば金属製であり板金製である。拘束バンドアッパ２３は、積層体２１に積層方向Ｄの拘束加重がかけられた状態を保持するために設けられる。拘束荷重が比較的高く、積層体２１からの反力で拘束バンドアッパ２３が変形するおそれがある場合には、ビードを追加すること、絞り加工や曲げ加工を施すこと等により、拘束バンドアッパ２３の剛性、強度の向上が図られていてもよい。 The restraint band upper 23 is made of, for example, metal and is made of sheet metal. The restraint band upper 23 is provided in order to maintain a state in which the restraint load in the stacking direction D is applied to the stacked body 21. When the restraint load is relatively high and the restraint band upper 23 may be deformed by the reaction force from the laminated body 21, the restraint band upper 23 may be added by adding a bead, drawing or bending. Improvement of rigidity and strength may be achieved.

ケース３０は、電池スタック２０を収容するケースである。ケース３０は、図２に示すように、電池スタック２０を固定支持（締結保持）するロアケース３１と、ロアケース３１の上側に配置されてロアケース３１に固定して取付けられるアッパケース３２と、を備える。 The case 30 is a case that houses the battery stack 20. As shown in FIG. 2, the case 30 includes a lower case 31 that fixes and supports (fastens and holds) the battery stack 20, and an upper case 32 that is disposed on the upper side of the lower case 31 and fixed and attached to the lower case 31.

ロアケース３１とアッパケース３２は、それぞれ、金属製であり板金製である。ロアケース３１とアッパケース３２は、それぞれ、複数部品構成であってもよいが、部品点数削減のため一部品構成であることが望ましい。 Each of the lower case 31 and the upper case 32 is made of metal and is made of sheet metal. Each of the lower case 31 and the upper case 32 may have a multi-part configuration, but it is preferable that the lower case 31 and the upper case 32 have a single-part configuration in order to reduce the number of parts.

ロアケース３１は、積層体２１（電池スタック２０）の下側で積層体２１の積層方向Ｄに延びる拘束バンドロア部３１ａを備える。 The lower case 31 includes a constrained band lower portion 31a extending in the stacking direction D of the stacked body 21 below the stacked body 21 (battery stack 20).

拘束バンドロア部３１ａは、一対のエンドプレート２２，２２にボルト等を用いて固定して取付けられる。拘束バンドロア部３１ａは、積層体２１に積層方向Ｄの拘束荷重がかけられた状態を保持する。すなわち、電池スタック２０の締結と拘束荷重がかかっている保持をロアケース３１で行なっている。本発明では、従来要していた２本の拘束バンドロアは廃止されており、拘束バンドアッパ２３とロアケース３１の拘束バンドロア部３１ａとのみで、積層体２１に積層方向Ｄに拘束荷重がかけられた状態が保持されている。 The restraint band lower portion 31a is fixedly attached to the pair of end plates 22, 22 using bolts or the like. The restraint band lower portion 31 a holds the state where the restraint load in the stacking direction D is applied to the stacked body 21. That is, the lower case 31 holds the battery stack 20 and holds the restraint load. In the present invention, the two conventionally required restraint band lowers are abolished, and the restraint load is applied to the laminate 21 in the stacking direction D only by the restraint band upper 23 and the restraint band lower portion 31a of the lower case 31. State is maintained.

拘束荷重が比較的高く、積層体２１からの反力で拘束バンドロア部３１ａ（ロアケース３１）が変形するおそれがある場合には、ビードを追加すること、絞り加工や曲げ加工を施すこと等により、拘束バンドロア部３１ａ（ロアケース３１）の剛性、強度の向上が図られていてもよい。なお、拘束バンドロア部３１ａに絞り加工や曲げ加工を積層方向Ｄと直交する方向に施すことにより拘束バンドロア部３１ａと積層体２１との間に積層方向Ｄに延びる空間Ｓができる場合、該空間Ｓを、電池２１ａを冷却するための冷媒（たとえば空気）が流れる冷却風流路として利用してもよい。この場合、シール部材４０等を用いて風漏れ対策が施されていてもよい。 When the restraint load is relatively high and the restraint band lower portion 31a (lower case 31) may be deformed by the reaction force from the laminate 21, by adding a bead, drawing or bending, etc., The restraint band lower part 31a (lower case 31) may be improved in rigidity and strength. When the constraining band lower portion 31a is subjected to drawing or bending in a direction perpendicular to the stacking direction D, a space S extending in the stacking direction D can be formed between the constraining band lower portion 31a and the stacked body 21. May be used as a cooling air flow path through which a refrigerant (for example, air) for cooling the battery 21a flows. In this case, measures against wind leakage may be taken using the seal member 40 or the like.

つぎに、本発明実施例の作用、効果を説明する。
（Ａ）ロアケース３１が積層体２１の下側で積層体２１の積層方向Ｄに延びており一対のエンドプレート２２，２２に固定される拘束バンドロア部３１ａを備えているため、従来要していた２本の拘束バンドロアの機能をロアケース２１に追加でき、従来要していた２本の拘束バンドロアが不要になる。そのため、従来に比べて部品点数を削減でき、コスト上有利である。また、部品点数を削減できるため、従来に比べて電池パック１０の組付工数も削減できコスト上有利である。 Next, the operation and effect of the embodiment of the present invention will be described.
(A) Since the lower case 31 includes a restraining band lower portion 31a that extends in the stacking direction D of the stacked body 21 and is fixed to the pair of end plates 22 and 22 on the lower side of the stacked body 21, it has been conventionally required. The function of the two restraint band lowers can be added to the lower case 21, so that the two restraint band lowers that have been conventionally required are not required. Therefore, the number of parts can be reduced as compared with the prior art, which is advantageous in terms of cost. Moreover, since the number of parts can be reduced, the number of assembling steps of the battery pack 10 can be reduced compared to the conventional case, which is advantageous in terms of cost.

（Ｂ）従来要していた２本の拘束バンドロアが不要になるため、従来に比べて２本の拘束バンドロアの配設スペースを無くすことができる。そのため、従来に比べて電池スタック２０の上下方向の体格を低減でき、電池パック１０の上下方向の体格を低減できる。 (B) Since the two constraining band lowers conventionally required are not required, the space for disposing the two constraining band lowers can be eliminated as compared with the conventional case. Therefore, the vertical physique of the battery stack 20 can be reduced compared to the conventional case, and the vertical physique of the battery pack 10 can be reduced.

（Ｃ）拘束バンドアッパ２３と、拘束バンドロア部３１ａを備えるロアケース３１とにより、積層体２１に積層方向Ｄに拘束荷重がかけられた状態が保持されているため、拘束バンドアッパ２３とロアケース３１のみで積層体２１に積層方向Ｄに拘束荷重がかけられた状態を保持できる。 (C) Since the restraint band upper 23 and the lower case 31 including the restraint band lower portion 31a hold the restraint load in the stacking direction D on the laminate 21, the restraint band upper 23 and the lower case 31 only. Thus, it is possible to maintain a state in which a restraint load is applied to the stacked body 21 in the stacking direction D.

（Ｄ）ビードを追加すること、絞り加工や曲げ加工を施すこと等により、拘束バンドロア部３１ａ（ロアケース３１）の剛性、強度の向上が図られる場合、ロアケース３１の剛性、強度の向上とともに、拘束バンドの機能としての剛性（拘束部品の剛性、拘束部品部分の剛性）も向上できる。 (D) When the rigidity and strength of the restraint band lower portion 31a (lower case 31) are improved by adding a bead, drawing or bending, etc., the rigidity and strength of the lower case 31 are improved and restrained. The rigidity as a function of the band (stiffness of the restraint part, rigidity of the restraint part) can also be improved.

（Ｅ）ロアケース３１は板金製であるため、従来の拘束バンドロアに比べて変形加工（塑性加工）の自由度が高い。よって、必要な剛性、強度を、板厚を増加させることなく比較的容易に確保できる。 (E) Since the lower case 31 is made of sheet metal, the degree of freedom of deformation processing (plastic processing) is higher than that of a conventional restraint band lower. Therefore, necessary rigidity and strength can be secured relatively easily without increasing the plate thickness.

１０ 電池パック
２０ 電池スタック
２１ 積層体
２１ａ 電池
２１ｂ 電池の上面
２２ エンドプレート
２３ 拘束バンドアッパ
３０ ケース
３１ ロアケース
３１ａ 拘束バンドロア部
３２ アッパケース
Ｄ 積層方向 DESCRIPTION OF SYMBOLS 10 Battery pack 20 Battery stack 21 Laminated body 21a Battery 21b Upper surface 22 of battery End plate 23 Restraint band upper 30 Case 31 Lower case 31a Restraint band lower part 32 Upper case D Stacking direction

Claims (2)

電池スタックと、ケースと、を有し、
前記電池スタックは、角型の電池を複数積層してなる積層体と、該積層体の積層方向の両側に配置される一対のエンドプレートと、前記積層体の上側で該積層体の積層方向に延びて設けられており延び方向両端部で前記一対のエンドプレートに固定される拘束バンドアッパと、を備えており、
前記ケースは、前記電池スタックを支持するロアケースと、該ロアケースに取付けられるアッパケースと、を備えており、前記電池スタックを収容しており、
前記ロアケースは、前記積層体の下側で該積層体の積層方向に延びており前記一対のエンドプレートに固定される拘束バンドロア部を備えている、電池パック。 A battery stack and a case;
The battery stack includes a stacked body in which a plurality of rectangular batteries are stacked, a pair of end plates disposed on both sides in the stacking direction of the stacked body, and in the stacking direction of the stacked body on the upper side of the stacked body. A constraining band upper that is extended and fixed to the pair of end plates at both ends in the extending direction;
The case includes a lower case that supports the battery stack, and an upper case that is attached to the lower case, and accommodates the battery stack,
The lower case includes a constraining band lower portion that extends in a stacking direction of the stacked body below the stacked body and is fixed to the pair of end plates. 前記拘束バンドアッパと、前記拘束バンドロア部を備える前記ロアケースとにより、前記積層体に前記積層方向に拘束荷重がかけられた状態が保持されている、請求項１記載の電池パック。   The battery pack according to claim 1, wherein a state in which a restraint load is applied to the stacked body in the stacking direction is maintained by the restraint band upper and the lower case including the restraint band lower portion.
JP2013230280A 2013-11-06 2013-11-06 Battery pack Pending JP2015090798A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107833993A (en) * 2017-10-13 2018-03-23 常州普莱德新能源电池科技有限公司 A kind of double-deck module for saving Battery case height space
JP2021026875A (en) * 2019-08-03 2021-02-22 三洋電機株式会社 Power supply device, and electric vehicle and power storage device including the same

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Publication number Priority date Publication date Assignee Title
JP2002008603A (en) * 2000-04-21 2002-01-11 Toyota Motor Corp Power supply
JP2008277050A (en) * 2007-04-26 2008-11-13 Toyota Motor Corp Power supply device
JP2011210451A (en) * 2010-03-29 2011-10-20 Toyoda Gosei Co Ltd Power supply device

Patent Citations (3)

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Publication number Priority date Publication date Assignee Title
JP2002008603A (en) * 2000-04-21 2002-01-11 Toyota Motor Corp Power supply
JP2008277050A (en) * 2007-04-26 2008-11-13 Toyota Motor Corp Power supply device
JP2011210451A (en) * 2010-03-29 2011-10-20 Toyoda Gosei Co Ltd Power supply device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107833993A (en) * 2017-10-13 2018-03-23 常州普莱德新能源电池科技有限公司 A kind of double-deck module for saving Battery case height space
CN107833993B (en) * 2017-10-13 2023-06-27 常州普莱德新能源电池科技有限公司 Double-layer module capable of saving height space of battery box
JP2021026875A (en) * 2019-08-03 2021-02-22 三洋電機株式会社 Power supply device, and electric vehicle and power storage device including the same
JP7366630B2 (en) 2019-08-03 2023-10-23 三洋電機株式会社 Power supply device, electric vehicle equipped with this power supply device, and power storage device

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