JP2004281099A - Battery pack - Google Patents

Battery pack Download PDF

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Publication number
JP2004281099A
JP2004281099A JP2003067548A JP2003067548A JP2004281099A JP 2004281099 A JP2004281099 A JP 2004281099A JP 2003067548 A JP2003067548 A JP 2003067548A JP 2003067548 A JP2003067548 A JP 2003067548A JP 2004281099 A JP2004281099 A JP 2004281099A
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Japan
Prior art keywords
battery
frame
secondary battery
electrolyte secondary
frames
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JP2003067548A
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Japanese (ja)
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JP2004281099A5 (en
JP4446147B2 (en
Inventor
Kuniyoshi Munenaga
胸永  訓良
Hideki Masuda
英樹 増田
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Japan Storage Battery Co Ltd
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Japan Storage Battery Co Ltd
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Priority to JP2003067548A priority Critical patent/JP4446147B2/en
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    • 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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Abstract

<P>PROBLEM TO BE SOLVED: To provide a battery pack capable of supporting a nonaqueous electrolyte secondary battery 1 between frame bodies 2, 2 without looseness by forming a projection 2h having a tip part deformed by being caught and fixed by the frame bodies 2, 2 catching the nonaqueous electrolyte secondary battery 1. <P>SOLUTION: In this battery pack, the side faces of each nonaqueous electrolyte secondary battery 1 is caught by the frame bodies 2, 2 from both front and rear sides, and one or more sets of members composed by bringing end faces 2g facing to each other of the front and rear frame bodies 2, 2 forming the pair into contact with each other are arranged in the longitudinal direction; and all the frame bodies 2 are caught and fixed by piercing bolts 4 from both sides in the longitudinal direction. The battery pack is so structured that the projections 2h projecting toward the side face side of the secondary battery 1 are formed on the inner side faces 2e of each frame body 2 facing to the caught front and rear side faces of the secondary battery 1. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【0001】
【発明の属する技術分野】
本発明は、電池を枠体で挟んだものを1組以上両側から挟持固定した組電池に関する。
【0002】
【従来の技術】
一般的な組電池は、複数個の電池を1組の枠体内にまとめて収納したものが多い。しかしながら、このような組電池では、組み合わせる電池の個数ごとに大きさの異なる枠体を樹脂成形等により作製しなければならず、需要者の要望に応じて任意の個数の電池を組み合わせた組電池を供給することが容易ではない。
【0003】
そこで、本出願人は、図2に示すような非水電解質二次電池1を図3に示すような枠体2で前後から挟んだものを図4に示すように多数組前後に並べて両側から挟持固定した組電池を先に提案した(特願2002−157979、特願2002−157980、特願2002−157981)。
【0004】
この組電池に用いる非水電解質二次電池1は、図2に示すように、ステンレス鋼板製の筐体状の電池容器1aの上端開口部をステンレス鋼板製の矩形の蓋板1bで塞いだ角型の電池であり、この蓋板1bの左右方向の両端部に正極端子1cと負極端子1dが突設されている。
【0005】
枠体2は、図3に示すように、左右方向に伸びた上端部の上桟部2a及び下端部の下桟部2bと、左右両端部の側柱部2c,2cとからなる左右対称形の樹脂製の枠である。この枠体2は、同じ構成の部品であって、前後が逆になるように半回転させて前方側に配置した別の枠体2と対になり、これらの枠体2,2の間に上記非水電解質二次電池1を挟むようになっている。また、この際、後方の枠体2の左右の側柱部2c,2cの前方の端面2gと、前方の枠体2の左右の側柱部2c,2cの後方の端面2gとが互いに当接することにより、非水電解質二次電池1の周囲をこれら前後に対となる枠体2,2で覆うことになる。
【0006】
組電池は、図4に示すように、上記1個の非水電解質二次電池1を前後に対となる枠体2,2で挟んだものを前後方向に複数組(図4では7組)並べると共に、この前後方向の両端部にステンレス鋼板製の側板3,3を配置し、4本の貫通ボルト4を用いて複数組の全ての枠体2を前後方向の両側から挟持固定したものである。従って、この組電池は、貫通ボルト4の長さを変更するだけで、需要者の要望に応じて任意の個数の非水電解質二次電池1を組み合わせることができるようになる。
【0007】
【発明が解決しようとする課題】
ところが、上記前後に対となる枠体2,2は、これらの側柱部2cの端面2g同士を当接させて非水電解質二次電池1を挟み込まなければ、組電池全体の前後方向の長さ寸法が一定せず、しかも、枠体2,2による組電池全体の支持が不安定なものになるおそれがある。しかしながら、前後に対となる枠体2,2の間の収納スペースの幅を非水電解質二次電池1の前後方向の幅よりも十分に大きくして側柱部2cの端面2g同士を確実に当接させるようにすると、この非水電解質二次電池1と枠体2,2の収納スペースとの間に隙間があいてガタつきが生じるという問題があった。
【0008】
また、この問題を解消するために、従来は、枠体2の収納スペースの内側に樹脂テープ等からなる緩衝材を貼り付けていたが、この場合には、組電池の組み立てに緩衝材が必要となり、部品点数が増加すると共に組み立て作業の工数も増加するという問題が生じていた。
【0009】
本発明は、かかる事情に対処するためになされたものであり、電池を挟む枠体に挟持固定によって先端部が潰れる突起を形成しておくことにより、この電池を枠体の間にガタつきなく支持することができる組電池を提供することを目的としている。
【0010】
【課題を解決するための手段】
請求項1の発明は、1個の電池の側面を前後両側から枠体で挟み、これら前後に対となる枠体の向かい合う端面同士を当接させたものを前後方向に1組以上並べ、全ての枠体を前後方向の両側から挟持固定した組電池において、枠体における挟持した電池の前後の側面と向かい合う部分に、この電池の側面側に向けて突出する突起が形成されたことを特徴とする。
【0011】
請求項1の発明によれば、前後に対となる枠体を前後方向から挟持すると、これらの枠体の向かい合う端面同士が当接するまで互いに接近する。従って、これらの枠体の向かい合う端面同士がまだ当接する前に、先端が電池の前後の側面に当接するように突起を突出させておけば、枠体の端面同士が当接するまで接近した際に、電池の側面に圧迫されてこの突起の先端部が塑性変形及び/又は弾性変形することになる。このため、対となる枠体とその間の電池との間に寸法的な誤差が生じていたとしても、この誤差を突起の先端部の変形によって吸収し隙間があくのを防止することができるようになる。この結果、全ての枠体を前後から挟持固定したときに、対となる枠体の向かい合う端面間に隙間が生じることなく、これらの枠体の間の電池にガタつきが生じることもなくなる。しかも、組電池の組み立ての際に緩衝材を挿入する必要もないので、部品点数や組み立て工数が増加することもない。
【0012】
なお、突起は、前後に対となる枠体の片方だけに設けてもよいが、この枠体を共通部品化するためには双方に設けることが好ましい。また、各電池ごとに対となる枠体を2個ずつ用いた場合には、これらを複数組並べたときに、前後に隣接する2個の電池の間に、前方の電池の後方の枠体と後方の電池の前方の枠体とが背中合わせに配置されることになる。しかしながら、ここでいう「対となる枠体」とは、特定の電池に対して前後に配置された枠体を意味するので、前方の電池の後方の枠体と後方の電池の前方の枠体が同じ枠体であって双方の電池で共用されるようにすることもできる。
【0013】
【発明の実施の形態】
以下、本発明の実施形態について図面を参照して説明する。
【0014】
図1は本発明の一実施形態を示すものであって、枠体の斜視図である。なお、図2〜図4に示した従来例と同様の機能を有する構成部材には同じ番号を付記する。
【0015】
本実施形態は、図2に示した非水電解質二次電池1を図1に示す枠体2で前後から挟んだものを図4に示すように多数組前後に並べて両側から挟持固定した組電池について説明する。従って、非水電解質二次電池1の構成は従来例と同じである。なお、この非水電解質二次電池1は、実際には、2個の長円筒形巻回型の発電要素を横置きに並べて電池容器1aに収納したものであり、2個の発電要素は並列に接続されている。
【0016】
枠体2は、図1に示すように、左右方向に伸びた上端部の上桟部2a及び下端部の下桟部2bと、左右両端部の側柱部2c,2cとからなる左右対称形のポリブチレンテレフタレート(PBT)製の枠であり、上方の中央部の左右に並んだ位置と下方の左右端部との4箇所に、前後方向に貫通する貫通孔2dがそれぞれ形成されている。この枠体2は、上桟部2aと下桟部2bにおける左右両端部の前方を向く内側面2eと、左右の両側柱部2c,2cが上下部で向かい合う対向面2f等で囲まれる収納スペースに、図2に示した非水電解質二次電池1の電池容器1aの後方側半分が嵌まり込むようになっている。また、この非水電解質二次電池1の電池容器1aの前方側半分は、図3に示した枠体2と同じ部品を前後が逆になるように半回転させて配置したものの収納スペースに同様に嵌まり込む。そして、この電池容器1aの後方側半分が嵌まり込んだ枠体2の側柱部2c,2cの前方の端面2gと、前方側半分が嵌まり込んだ枠体2の側柱部2c,2cの後方の端面2gとが互いに当接することにより、非水電解質二次電池1の周囲全体をこれら前後に対となる枠体2,2で挟み覆うことになる。
【0017】
上記上桟部2aと下桟部2bの内側面2eには、枠体2,2が挟み込んだ非水電解質二次電池1の電池容器1aの前後の側面側に向けて突出するプロジェクション2hが形成されている。プロジェクション2hは、枠体2の樹脂成形時に一体形成されるピン状の突起である。ここで、内側面2eに、図3に示した従来例のように、プロジェクション2hが形成されていないとすると、前後に対となる枠体2,2が非水電解質二次電池1を挟んで端面2g,2g同士を当接させた際に、これらの内側面2eと電池容器1aの前後の側面との間にはわずかな隙間が生じるように、枠体2の大きさが設計されている。即ち、製造時に許容される寸法誤差が生じたとしても、枠体2の内側面2eから端面2gまでの前後方向の距離の2倍が非水電解質二次電池1の電池容器1aの前後方向の幅よりも常にわずかに大きくなるような寸法と公差で設計が行われている。また、プロジェクション2hの内側面2eからの突出量は、この内側面2eと電池容器1aの前後の側面との間の隙間が製造時に許容される寸法誤差により最大となる場合の半分の長さを確実に超えるような寸法と公差で設計が行われている。従って、このような枠体2,2で非水電解質二次電池1を挟むと、まず双方の内側面2eのプロジェクション2hの先端が電池容器1aの前後の側面に当接することになり、端面2g間にはわずかな隙間が生じるようになる。
【0018】
上記1個の非水電解質二次電池1を前後に対となる枠体2,2で挟んだものは、図4に示したように、前後方向に複数組並べると共に、この前後方向の両端にステンレス鋼板製の側板3,3を配置し、4本の貫通ボルト4を用いて複数組の全ての枠体2を前後方向の両側から挟持固定することにより組電池となる。なお、各枠体2の内側面2eの反対側の面には凹凸部が形成されているので、対となる枠体2,2を前後方向に並べた際に、これらの凹凸部が互いに係合し、一部の枠体2が上下方向や左右方向にずれるのを防ぐことができる。4本の貫通ボルト4は、側板3,3に形成された抜き孔と、各枠体2の貫通孔2dに通して、両端部にナットを螺着し締め付けることにより、複数組の全ての枠体2を前後方向の両側から挟持固定する。
【0019】
上記構成により、組電池の組み立て時に貫通ボルト4とナットによる締め付けが行われると、各組の対となる枠体2,2は、前後方向に圧迫されて端面2g間のわずかな隙間がなくなり当接するようになる。そして、この際に、プロジェクション2hの先端部が非水電解質二次電池1の電池容器1aの側面に押圧されて塑性変形(潰れたり曲がる)及び/又は弾性変形(曲がったり圧縮される)するので、この非水電解質二次電池1は、枠体2,2の間に隙間なく圧迫挟持された状態となる。この結果、本実施形態によれば、各組の対となる枠体2,2の端面2g間に隙間が生じることなく、これらの枠体2,2の間に挟んだ非水電解質二次電池1にガタ付きが生じないようにすることができる。
【0020】
なお、上記実施形態では、内側面2eからピン状に突出したプロジェクション2hを示したが、枠体2,2を圧迫することにより先端部が塑性変形及び/又は弾性変形する程度の大きさと形状の突起であればよいので、例えば半球状や円錐形、角錐形等の突起であってもよい。また、突起を形成する箇所数も任意であり、ブラシの毛状の細長い突起を多数形成したり、壁板状の突起を形成することもできる。さらに、この突起は、前後に対となる枠体2,2における少なくとも一方にのみ形成されていれば足りる。さらに、上記実施形態では、全ての枠体2を挟持固定する際に、突起の先端部を塑性変形及び/又は弾性変形させる場合を示したが、対となる枠体2,2ごとに前後から圧迫することにより突起の先端部を塑性変形及び/又は弾性変形させてから、これらを複数組並べて挟持固定するようにしてもよい。しかも、この突起は、内側面2eだけでなく、側柱部2cの対向面2f等に形成することもできる。この場合、非水電解質二次電池1を枠体2に嵌め込む際に、例えば押し込む等により突起の先端部を塑性変形及び/又は弾性変形させるようにすればよい。
【0021】
また、上記実施形態では、前後に対となる枠体2,2が同一面上の端面2gで当接する場合を示したが、複数の面上にある複雑な形状の端面同士が当接するようになっていてもよい。さらに、この端面は、上記実施形態のように上下方向と左右方向に沿った垂直面である必要はなく、傾斜面や曲面であってもよい。
【0022】
また、上記実施形態では、各非水電解質二次電池1ごとに対となる枠体2,2を2個ずつ用いる場合を示したが、隣接する非水電解質二次電池1の間の2個の枠体2,2を共用して1個の枠体2だけを配置することもできる。さらに、上記実施形態では、ポリブチレンテレフタレート製の枠体2を示したが、他の樹脂製やその他の例えば金属製の枠体を用いることもできる。ただし、非水電解質二次電池1の側面によって押圧することにより、突起の先端部を塑性変形させる場合には、この非水電解質二次電池1の側面の材質よりも硬度の低い材質を用い、弾性変形させる場合には、弾性の大きい材質を用いなければならない。
【0023】
また、上記実施形態では、1個の非水電解質二次電池1を対となる枠体2,2で挟んだものを複数組並べたものを示したが、1組だけであっても本発明を同様に実施することができる。さらに、上記実施形態では、組電池の前後方向の両端に側板3,3を配置する場合を示したが、枠体2だけを挟持固定したものであってもよい。さらに、上記実施形態では、貫通ボルト4によって全ての枠体2を挟持固定する場合を示したが、挟持固定を行うための固定部材の構成は任意であり、例えば金属板等で周囲全体を締め付けるようにすることもできる。しかも、このような固定部材を用いる代わりに、前後方向から圧迫した状態で、各枠体2を接着や熱融着等によって固着することにより挟持固定することもできる。
【0024】
また、上記実施形態では、角形の非水電解質二次電池1を用いる場合を示したが、長円筒形等のように前後方向の両側にほぼ平行な平面からなる側面を配置することができる電池形状のものであってもよく、楕円筒形や円筒形等のように、前後方向の両側の側面の接面が互いにほぼ平行になるような電池形状のものであってもよい。さらに、上記実施形態では、非水電解質二次電池1について示したが、この電池の種類も任意である。
【0025】
【発明の効果】
以上の説明から明らかなように、本発明の組電池によれば、対となる枠体の向かい合う端面間に隙間を生じることなく、これらの枠体の間の電池にガタつきが生じないようにすることができる。しかも、組電池の組み立ての際に緩衝材を挿入する必要がないので、部品点数や組み立て工数が増加することもない。
【図面の簡単な説明】
【図1】本発明の一実施形態を示すものであって、枠体の斜視図である。
【図2】前後に対となる枠体に挟まれる非水電解質二次電池の斜視図である。
【図3】従来例を示すものであって、枠体の斜視図である。
【図4】組電池の全体構成を示す斜視図である。
【符号の説明】
1 非水電解質二次電池
1a 電池容器
2 枠体
2e 内側面
2g 端面
2h プロジェクション
4 貫通ボルト
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an assembled battery in which at least one set of batteries sandwiched between frames is held and fixed from both sides.
[0002]
[Prior art]
Many general assembled batteries include a plurality of batteries collectively housed in a single frame. However, in such an assembled battery, frames having different sizes must be manufactured by resin molding or the like for each number of batteries to be combined, and an assembled battery in which an arbitrary number of batteries are combined according to a demand of a consumer. Is not easy to supply.
[0003]
Accordingly, the present applicant has arranged a large number of non-aqueous electrolyte secondary batteries 1 as shown in FIG. 2 which are sandwiched between front and rear frames 2 as shown in FIG. The assembled and fixed battery was previously proposed (Japanese Patent Application No. 2002-157979, Japanese Patent Application No. 2002-157980, Japanese Patent Application No. 2002-157981).
[0004]
As shown in FIG. 2, the nonaqueous electrolyte secondary battery 1 used for this battery pack has a corner formed by closing an upper end opening of a stainless steel plate-shaped battery case 1a with a stainless steel plate rectangular cover plate 1b. A positive terminal 1c and a negative terminal 1d protrude from both ends of the cover plate 1b in the left-right direction.
[0005]
As shown in FIG. 3, the frame 2 has a left-right symmetrical shape including an upper cross section 2a and a lower cross section 2b at the upper end extending in the left-right direction, and side pillars 2c, 2c at both left and right ends. Is a resin frame. This frame 2 is a part of the same configuration, and is paired with another frame 2 arranged on the front side by being rotated half a turn so that the front and rear are reversed. The non-aqueous electrolyte secondary battery 1 is sandwiched therebetween. Also, at this time, the front end faces 2g of the left and right side pillars 2c, 2c of the rear frame 2 and the rear end faces 2g of the left and right side pillars 2c, 2c of the front frame 2 contact each other. Accordingly, the periphery of the nonaqueous electrolyte secondary battery 1 is covered with the pair of frames 2 and 2 before and after these.
[0006]
As shown in FIG. 4, the assembled battery includes a plurality of sets (seven sets in FIG. 4) in which the one nonaqueous electrolyte secondary battery 1 is sandwiched between the pair of frames 2 and 2 in the front and rear direction. At the same time, side plates 3 and 3 made of stainless steel plate are arranged at both ends in the front-rear direction, and all the frames 2 of a plurality of sets are clamped and fixed from both sides in the front-rear direction using four through bolts 4. is there. Therefore, in this assembled battery, an arbitrary number of non-aqueous electrolyte secondary batteries 1 can be combined according to a demand of a customer only by changing the length of the through bolt 4.
[0007]
[Problems to be solved by the invention]
However, the pair of front and rear frames 2 and 2 has a long length in the front and rear direction of the entire assembled battery unless the end faces 2g of the side pillars 2c are brought into contact with each other and the nonaqueous electrolyte secondary battery 1 is sandwiched therebetween. The dimensions are not constant, and furthermore, the support of the entire assembled battery by the frames 2, 2 may be unstable. However, the width of the storage space between the pair of front and rear frame bodies 2 is sufficiently larger than the width of the nonaqueous electrolyte secondary battery 1 in the front-rear direction, so that the end surfaces 2g of the side pillar portions 2c are securely connected to each other. If they are brought into contact with each other, there is a problem that there is a gap between the nonaqueous electrolyte secondary battery 1 and the storage space for the frames 2 and 2 and rattling occurs.
[0008]
Conventionally, in order to solve this problem, a cushioning material made of a resin tape or the like is stuck inside the storage space of the frame 2, but in this case, a cushioning material is required for assembling the assembled battery. Therefore, there has been a problem that the number of parts increases and the number of assembling steps also increases.
[0009]
The present invention has been made in order to cope with such a situation. By forming a protrusion whose front end portion is crushed by holding and fixing the battery in a frame body, the battery is prevented from rattling between the frame bodies. An object of the present invention is to provide a battery pack that can be supported.
[0010]
[Means for Solving the Problems]
The invention according to claim 1 is such that one side of a battery is sandwiched between the front and rear sides of the frame body, and one or more pairs of the front and rear facing frame end faces are arranged in the front and rear direction. In the assembled battery in which the frame body is sandwiched and fixed from both sides in the front-rear direction, a protrusion protruding toward the side surface side of the battery is formed on a portion of the frame body facing the front and rear side faces of the sandwiched battery. I do.
[0011]
According to the first aspect of the invention, when the pair of front and rear frames is sandwiched from the front and rear directions, the facing end faces of these frames approach each other until they come into contact with each other. Therefore, if the projections are made to protrude so that the front ends contact the front and rear side surfaces of the battery before the facing end faces of these frames still contact each other, when the end faces of the frame approach each other, they approach each other. The tip of this projection is plastically and / or elastically deformed by being pressed against the side surface of the battery. For this reason, even if a dimensional error occurs between the paired frames and the battery therebetween, the error can be absorbed by the deformation of the tip of the projection and the gap can be prevented. become. As a result, when all the frames are sandwiched and fixed from the front and rear, no gap is formed between the facing end faces of the pair of frames, and the battery between these frames does not rattle. In addition, since there is no need to insert a cushioning material when assembling the assembled battery, the number of components and the number of assembling steps do not increase.
[0012]
The protrusions may be provided only on one side of the frame body that is paired in the front and back, but it is preferable to provide the protrusions on both sides in order to make the frame body a common part. When two pairs of frame bodies are used for each battery, when a plurality of these frames are arranged, the frame body behind the front battery is placed between two front and rear adjacent batteries. And the front frame of the rear battery will be placed back to back. However, the term “paired frame body” as used herein means a frame body arranged before and after a specific battery, and therefore, a frame body behind a front battery and a frame body ahead of a rear battery. May be the same frame and shared by both batteries.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0014]
FIG. 1 shows an embodiment of the present invention and is a perspective view of a frame. Components having the same functions as those of the conventional example shown in FIGS. 2 to 4 are denoted by the same reference numerals.
[0015]
In the present embodiment, as shown in FIG. 4, a battery pack in which the non-aqueous electrolyte secondary battery 1 shown in FIG. 2 is sandwiched from front and rear by a plurality of sets as shown in FIG. Will be described. Therefore, the configuration of the nonaqueous electrolyte secondary battery 1 is the same as that of the conventional example. The non-aqueous electrolyte secondary battery 1 is actually a battery in which two long cylindrical wound-type power generating elements are arranged side by side and stored in a battery container 1a. It is connected to the.
[0016]
As shown in FIG. 1, the frame body 2 is a left-right symmetrical shape including an upper cross section 2a and a lower cross section 2b at the upper end extending in the left-right direction, and side pillars 2c, 2c at both left and right ends. And four through-holes 2d that penetrate in the front-rear direction are formed at four positions, that is, at the upper central portion and at the left and right end portions. The frame 2 has a storage space surrounded by an inner side surface 2e of the upper cross section 2a and the lower cross section 2b facing the front of both left and right ends, and an opposing surface 2f in which the left and right side pillars 2c, 2c face each other in the upper and lower portions. The rear half of the battery container 1a of the nonaqueous electrolyte secondary battery 1 shown in FIG. Also, the front half of the battery container 1a of the nonaqueous electrolyte secondary battery 1 is similar to the storage space of the one in which the same parts as the frame 2 shown in FIG. Fit in. The front end face 2g of the side pillars 2c, 2c of the frame 2 into which the rear half of the battery container 1a is fitted, and the side pillars 2c, 2c of the frame 2 into which the front half is fitted. Abuts with the rear end face 2g, thereby covering the entire periphery of the nonaqueous electrolyte secondary battery 1 with the pair of front and rear frames 2, 2.
[0017]
Projections 2h projecting toward the front and rear side surfaces of the battery container 1a of the nonaqueous electrolyte secondary battery 1 sandwiched between the frames 2, 2 are formed on the inner side surfaces 2e of the upper cross section 2a and the lower cross section 2b. Have been. The projection 2h is a pin-shaped projection integrally formed when the frame 2 is molded with resin. Here, assuming that the projection 2h is not formed on the inner side surface 2e as in the conventional example shown in FIG. 3, the frame bodies 2, 2 that are paired in the front and rear are sandwiching the nonaqueous electrolyte secondary battery 1. The size of the frame 2 is designed such that when the end faces 2g are brought into contact with each other, a slight gap is formed between the inner side face 2e and the front and rear side faces of the battery case 1a. . That is, even if a dimensional error allowed at the time of manufacturing occurs, twice the distance in the front-rear direction from the inner surface 2e to the end surface 2g of the frame 2 is equal to the length in the front-rear direction of the battery container 1a of the nonaqueous electrolyte secondary battery 1. The design is made with dimensions and tolerances that are always slightly larger than the width. The amount of projection of the projection 2h from the inner surface 2e is half the length when the gap between the inner surface 2e and the front and rear side surfaces of the battery container 1a is maximized due to a dimensional error allowed during manufacturing. Designed with dimensions and tolerances that will definitely exceed. Therefore, when the non-aqueous electrolyte secondary battery 1 is sandwiched between the frames 2, 2, first, the tips of the projections 2 h on both inner side surfaces 2 e come into contact with the front and rear side surfaces of the battery container 1 a, and the end surface 2 g There will be a slight gap between them.
[0018]
As shown in FIG. 4, a plurality of the non-aqueous electrolyte secondary batteries 1 sandwiched between the pair of frames 2 and 2 are arranged in the front-rear direction, and at both ends in the front-rear direction. The assembled battery is obtained by arranging the side plates 3 and 3 made of stainless steel plate and clamping and fixing all the frames 2 of a plurality of sets from both sides in the front-rear direction using four through bolts 4. Since an uneven portion is formed on the surface opposite to the inner side surface 2e of each frame 2, when the pair of frames 2, 2 are arranged in the front-rear direction, these uneven portions are engaged with each other. In this case, it is possible to prevent some of the frames 2 from shifting in the vertical and horizontal directions. The four through bolts 4 are passed through through holes formed in the side plates 3 and 3 and through holes 2 d of each frame body 2, and nuts are screwed and fastened to both ends thereof, whereby all frames of a plurality of sets are formed. The body 2 is clamped and fixed from both sides in the front-rear direction.
[0019]
According to the above configuration, when the through-bolt 4 and the nut are tightened at the time of assembling the assembled battery, the frame bodies 2, which are a pair of each set, are pressed in the front-rear direction and there is no slight gap between the end faces 2 g. Be in touch. At this time, the tip of the projection 2h is pressed against the side surface of the battery container 1a of the nonaqueous electrolyte secondary battery 1 and is plastically deformed (crushed or bent) and / or elastically deformed (bent or compressed). The non-aqueous electrolyte secondary battery 1 is pressed and held between the frames 2 and 2 without any gap. As a result, according to the present embodiment, the nonaqueous electrolyte secondary battery sandwiched between the frame bodies 2, 2 is formed without any gap between the end faces 2g of the frame bodies 2, 2 forming the pair. 1 can be prevented from rattling.
[0020]
In the above-described embodiment, the projection 2h projecting in the form of a pin from the inner side surface 2e is shown. However, when the projections 2a and 2b are pressed, the distal end portion is plastically and / or elastically deformed. As long as it is a projection, it may be, for example, a hemispherical, conical, or pyramidal projection. Also, the number of locations where the projections are formed is arbitrary, and it is possible to form a number of elongated brush-like projections or to form wall-plate-like projections. Furthermore, it is sufficient that the projection is formed only on at least one of the pair of front and rear frame bodies 2. Further, in the above-described embodiment, when all the frame bodies 2 are sandwiched and fixed, the tip of the protrusion is plastically deformed and / or elastically deformed. The tip of the protrusion may be plastically and / or elastically deformed by pressing, and then a plurality of these may be arranged and fixed. In addition, the protrusion can be formed not only on the inner side surface 2e but also on the facing surface 2f of the side pillar 2c. In this case, when the nonaqueous electrolyte secondary battery 1 is fitted into the frame 2, the tip of the protrusion may be plastically and / or elastically deformed, for example, by being pressed.
[0021]
Further, in the above-described embodiment, the case where the pair of front and rear frames 2 and 2 abut on the end surface 2g on the same surface has been described, but the end surfaces of complicated shapes on a plurality of surfaces are in contact with each other. It may be. Furthermore, this end face does not need to be a vertical plane along the up-down direction and the left-right direction as in the above embodiment, but may be an inclined plane or a curved plane.
[0022]
Further, in the above-described embodiment, the case where two pairs of frame bodies 2 and 2 are used for each non-aqueous electrolyte secondary battery 1 has been described, but two frames between adjacent non-aqueous electrolyte secondary batteries 1 are used. It is also possible to dispose only one frame body 2 by sharing the frame bodies 2 and 2. Furthermore, in the above-described embodiment, the frame 2 made of polybutylene terephthalate is shown, but another resin or other metal frame, for example, may be used. However, when the tip of the protrusion is plastically deformed by pressing with the side surface of the nonaqueous electrolyte secondary battery 1, a material having a lower hardness than the material of the side surface of the nonaqueous electrolyte secondary battery 1 is used. In the case of elastic deformation, a material having high elasticity must be used.
[0023]
Further, in the above-described embodiment, a plurality of sets in which one nonaqueous electrolyte secondary battery 1 is sandwiched between paired frames 2 and 2 are shown. Can be similarly implemented. Further, in the above-described embodiment, the case where the side plates 3 and 3 are arranged at both ends in the front-rear direction of the battery pack has been described, but it may be one in which only the frame body 2 is sandwiched and fixed. Further, in the above-described embodiment, the case where all the frame bodies 2 are clamped and fixed by the through bolts 4 has been described. However, the configuration of the fixing member for performing the clamping and fixing is arbitrary. You can also do so. Moreover, instead of using such a fixing member, it is also possible to hold and fix each frame 2 by bonding or heat fusion in a state of being pressed from the front-rear direction.
[0024]
Further, in the above embodiment, the case where the prismatic non-aqueous electrolyte secondary battery 1 is used has been described, but a battery such as a long cylinder or the like in which side surfaces formed of planes substantially parallel to each other in the front-rear direction can be arranged. The battery may have a shape such as an elliptic cylindrical shape or a cylindrical shape such that the contact surfaces on both sides in the front-rear direction are substantially parallel to each other. Further, in the above embodiment, the non-aqueous electrolyte secondary battery 1 has been described, but the type of this battery is also arbitrary.
[0025]
【The invention's effect】
As is clear from the above description, according to the battery pack of the present invention, without generating a gap between the facing end faces of the paired frame bodies, the battery between these frame bodies is prevented from rattling. can do. In addition, since there is no need to insert a cushioning material when assembling the assembled battery, the number of components and the number of assembling steps do not increase.
[Brief description of the drawings]
FIG. 1 shows one embodiment of the present invention, and is a perspective view of a frame.
FIG. 2 is a perspective view of a non-aqueous electrolyte secondary battery sandwiched between front and rear frames.
FIG. 3 shows a conventional example, and is a perspective view of a frame.
FIG. 4 is a perspective view showing the overall configuration of the battery pack.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Non-aqueous electrolyte secondary battery 1a Battery container 2 Frame 2e Inner side 2g End 2h Projection 4 Through bolt

Claims (1)

1個の電池の側面を前後両側から枠体で挟み、これら前後に対となる枠体の向かい合う端面同士を当接させたものを前後方向に1組以上並べ、全ての枠体を前後方向の両側から挟持固定した組電池において、
枠体における挟持した電池の前後の側面と向かい合う部分に、この電池の側面側に向けて突出する突起が形成されたことを特徴とする組電池。
One side of one battery is sandwiched between the front and rear sides of the frame body, and at least one pair of the front and rear facing frame end faces facing each other are arranged in the front and rear direction. In a battery pack clamped and fixed from both sides,
An assembled battery, wherein a protrusion protruding toward the side surface of the battery is formed at a portion of the frame body facing the front and rear side surfaces of the sandwiched battery.
JP2003067548A 2003-03-13 2003-03-13 Assembled battery Expired - Fee Related JP4446147B2 (en)

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WO2009040982A1 (en) * 2007-09-27 2009-04-02 Kabushiki Kaisha Toshiba Cell assembly
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KR100658677B1 (en) 2004-12-07 2006-12-15 삼성에스디아이 주식회사 Secondary battery module and wall of secondary battery module
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WO2010140584A1 (en) * 2009-06-01 2010-12-09 株式会社Gsユアサ Battery and method for manufacturing battery
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JPWO2010140584A1 (en) * 2009-06-01 2012-11-22 株式会社Gsユアサ Assembled battery and method of manufacturing the assembled battery
US9023507B2 (en) 2009-06-01 2015-05-05 Gs Yuasa International, Ltd. Battery assembly and method of manufacturing the same
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