JP2014170697A - Battery pack - Google Patents

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JP2014170697A
JP2014170697A JP2013042704A JP2013042704A JP2014170697A JP 2014170697 A JP2014170697 A JP 2014170697A JP 2013042704 A JP2013042704 A JP 2013042704A JP 2013042704 A JP2013042704 A JP 2013042704A JP 2014170697 A JP2014170697 A JP 2014170697A
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assembled battery
laminate type
liquid
members
unit cell
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Tadashi Tsunoda
正 角田
Junji Yasuda
順司 安田
Kenta Fukami
賢太 深見
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Honda Motor Co Ltd
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Honda Motor 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

Abstract

PROBLEM TO BE SOLVED: To easily adjust the temperatures of a plurality of laminate type single cells and to eliminate the likelihood of damage to a prepositional member.SOLUTION: Three pipe members 16a to 16c are held on hold members 12, 14. Laminate type single cells 18a, 18b are inserted between the pipe members 16a and 16b, and between the pipe members 16b, 16c. Liquid communication passages 28a, 28b are formed in the hold members 12, 14, and a liquid communication passage 32 is formed in the pipe members 16a to 16c. Additionally, plate springs 36a, 36b are interposed between the laminate type single cell 18a and the pipe members 16a, 16b, and plate springs 36c, 36d are interposed between the laminate type single cell 18b and the pipe members 16b, 16c. Clearances 38a, 38b, in which gas can circulate, are formed between the plate springs 36a to 36d and pipe members 16a to 16c and between the laminate type single cells 18a, 18b.

Description

本発明は、複数個のラミネート型単電池を組み合わせて構成される組電池に関し、一層詳細には、平行に並列配置された管部材同士の間にラミネート型単電池が挿入される組電池に関する。   The present invention relates to an assembled battery formed by combining a plurality of laminated unit cells, and more particularly to an assembled battery in which a laminated unit cell is inserted between tube members arranged in parallel.

正極活物質、電解質及び負極活物質を、可撓性を示す外装体に封入するラミネート型（単）電池が広汎に用いられるに至っている。近時、この種のラミネート型単電池を複数個組み合わせて高容量の組電池とすることが検討されている。   Laminated (single) batteries in which a positive electrode active material, an electrolyte, and a negative electrode active material are sealed in a flexible exterior body have been widely used. Recently, it has been studied to combine a plurality of laminated cell types of this type into a high-capacity assembled battery.

ところで、一般的な電池の放電反応は発熱反応である。前記組電池においても、外部負荷を電気エネルギによって付勢するべく全てのラミネート型単電池を放電状態としたときには、ラミネート型単電池が熱を帯びて温度上昇を起こす。ラミネート型単電池が過度に高温となると、電池特性が低下する可能性が高い。このため、組電池を冷却する構成が種々提案されている。   By the way, a general battery discharge reaction is an exothermic reaction. Also in the assembled battery, when all the laminate type cells are discharged to urge the external load with electric energy, the laminate type cells are heated and the temperature rises. If the laminate type battery becomes too hot, the battery characteristics are likely to deteriorate. For this reason, various configurations for cooling the assembled battery have been proposed.

例えば、特許文献１には、水冷ジャケットと単電池とを交互に積層した構成の組電池が開示されている。該特許文献１の記載によれば、発熱が大きくなる電池素子に近接して冷却媒体が流通するので、単電池と冷却媒体との間の熱交換が促進されて冷却効率が優れたものとなる、とのことである。   For example, Patent Literature 1 discloses an assembled battery having a configuration in which water-cooling jackets and single cells are alternately stacked. According to the description of Patent Document 1, since the cooling medium flows close to the battery element that generates a large amount of heat, heat exchange between the unit cell and the cooling medium is promoted, and the cooling efficiency is excellent. That's it.

また、特許文献２記載の集合型密閉二次電池（組電池）では、発電要素を収容した電槽同士の間と、電槽の左右両端面側とに冷却媒体通路を設ける構成を採用している。この場合、冷却媒体通路を通る冷却媒体によって、全単電池の各側面が強制冷却される。   Moreover, in the collective sealed secondary battery (assembled battery) described in Patent Document 2, a configuration is adopted in which cooling medium passages are provided between the battery cases in which the power generation elements are accommodated and between the left and right end surfaces of the battery case. Yes. In this case, each side surface of all the unit cells is forcibly cooled by the cooling medium passing through the cooling medium passage.

特開２００７−６６６４７号公報JP 2007-66647 A 特開２０００−２５１９５０号公報JP 2000-251950 A

特許文献１記載の技術では、単電池と水冷ジャケットの積層物が拘束バンドによって緊締される。特許文献２記載の技術においても同様に、単電池の積層物を拘束バンドで緊締するようにしている。   In the technique described in Patent Document 1, a laminate of a unit cell and a water cooling jacket is fastened by a restraining band. Similarly, in the technique described in Patent Document 2, a stack of unit cells is fastened with a restraining band.

ここで、単電池は、放電時には上記したように熱を帯び、その温度が上昇する。この温度上昇により、それぞれの単電池、ひいては組電池全体が熱膨張（体積増加）を起こす。従って、特許文献１、２に記載されるような緊締を行っていると、単電池の体積増加に伴って拘束バンドや電槽、水冷ジャケット等に応力が作用することになる。このため、冷却媒体通路が圧潰されて冷却媒体が流通することが困難となったり、場合によっては、熱膨張量が過度に大きくなったことに起因して上記の部材が破損したりする懸念がある。特に、単電池がラミネート型単電池であるときには、外装体が可撓性であるために熱膨張量が大きいので、この懸念を払拭することが容易ではない。   Here, the unit cell is heated as described above during discharging, and its temperature rises. Due to this temperature rise, each unit cell, and thus the assembled battery as a whole, undergoes thermal expansion (volume increase). Therefore, when tightening is performed as described in Patent Documents 1 and 2, stress acts on the restraining band, the battery case, the water cooling jacket, etc. as the volume of the unit cell increases. For this reason, there is a concern that the cooling medium passage may be crushed and it becomes difficult for the cooling medium to circulate, or in some cases, the above-described member may be damaged due to excessive thermal expansion. is there. In particular, when the unit cell is a laminate type unit cell, since the thermal expansion amount is large because the exterior body is flexible, it is not easy to remove this concern.

そこで、単電池の熱膨張量を見込み、単電池同士の間や、単電池と水冷ジャケットとの間に所定のクリアランスを予め形成して組電池を構成することも考えられる。しかしながら、この場合、冷却媒体と単電池が離間することになり、その分、冷却効率が低下するという不具合を招く。   In view of the thermal expansion amount of the single cells, it is also conceivable to form a battery pack by forming a predetermined clearance in advance between the single cells or between the single cells and the water cooling jacket. However, in this case, the cooling medium and the unit cell are separated from each other, which causes a problem that the cooling efficiency is lowered accordingly.

本発明は上記した問題を解決するためになされたもので、温度調整が容易であり、しかも、構成部材が破損する懸念を払拭し得る組電池を提供することを目的とする。   The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an assembled battery that can be easily adjusted in temperature and can eliminate the concern that the constituent members are damaged.

前記の目的を達成するために、本発明は、複数個のラミネート型単電池を保持して構成される組電池であって、
液体が流通する液体流通路が内部に形成された複数個の管部材を平行に並列配置した状態で保持するとともに、前記液体流通路に連通する液体連通路が形成された保持部材を有し、
各々のラミネート型単電池が、前記複数個の管部材中の隣接する２本の間に挿入され、
さらに、前記ラミネート型単電池と、前記２本の管部材中の少なくとも１本との間に介装されて前記ラミネート型単電池の前記管部材からの抜け止めをなし、且つ前記ラミネート型単電池と前記管部材との間に気体が流通可能となる気体流通路が形成された抜け止め部材を備えることを特徴とする。 In order to achieve the above object, the present invention is an assembled battery configured by holding a plurality of laminated unit cells,
A liquid flow passage through which liquid flows is held in a state in which a plurality of pipe members formed therein are arranged in parallel and has a holding member in which a liquid communication passage communicating with the liquid flow passage is formed,
Each laminated unit cell is inserted between two adjacent ones of the plurality of tube members,
Further, the laminate type unit cell is interposed between the laminate type unit cell and at least one of the two tube members to prevent the laminate type unit cell from being detached from the tube member, and the laminate type unit cell. And a pipe member that includes a retaining member in which a gas flow passage through which gas can flow is formed.

このような構成において、例えば、液体として冷却媒体を選定すると、ラミネート型単電池を、冷却媒体と、気体流通路を流通する気体とで冷却することができる。すなわち、二重冷却を行うことが可能となるので、ラミネート型単電池を効率よく冷却することができる。換言すれば、温度調整が容易である。場合によっては、液体連通路及び液体流通路に加温媒体を流通させるようにしてもよい。   In such a configuration, for example, when a cooling medium is selected as the liquid, the laminated unit cell can be cooled with the cooling medium and the gas flowing through the gas flow passage. That is, since it becomes possible to perform double cooling, it is possible to efficiently cool the laminated unit cell. In other words, temperature adjustment is easy. In some cases, a heating medium may be circulated through the liquid communication path and the liquid flow path.

また、ラミネート型単電池が熱膨張を起こす際には、抜け止め部材が圧縮される。ラミネート型単電池の体積増加に伴って発生した応力は、この圧縮によって吸収ないし緩和される。従って、管部材等に応力が作用することや、その結果として管部材等が破損することを回避することができる。   Further, when the laminate type single cell undergoes thermal expansion, the retaining member is compressed. The stress generated as the volume of the laminated unit cell increases is absorbed or relaxed by this compression. Therefore, it is possible to avoid stress acting on the tube member or the like and damage to the tube member or the like as a result.

しかも、この場合、抜け止め部材のみが圧縮されるので、組電池全体の体積が増加することが防止される。従って、組電池が体積増加を起こすことを考慮した上で、組電池の搭載スペースを設定する必要は特にない。このため、組電池の配置レイアウトの自由度が向上する。   In addition, in this case, since only the retaining member is compressed, it is possible to prevent the volume of the assembled battery from increasing. Therefore, it is not particularly necessary to set a mounting space for the assembled battery in consideration of the increase in volume of the assembled battery. For this reason, the freedom degree of the arrangement layout of an assembled battery improves.

抜け止め部材は、弾性体であることが好ましい。この場合、ラミネート型単電池が収縮するときには抜け止め部材が圧縮される前の形状に戻るので、抜け止め機能が再び発現するからである。   The retaining member is preferably an elastic body. In this case, when the laminate type cell contracts, the retaining member returns to the shape before being compressed, so that the retaining function is exhibited again.

弾性体の好適な例としては、板バネを挙げることができる。特に、波形状部を有するものであることが好ましい。波形状部の管部材に当接する部位には、ラミネート型単電池から離間することで形成されるクリアランスが存在し、一方、ラミネート型単電池に当接する部位には、管部材から離間することで形成されるクリアランスが存在する。これらのクリアランスが、前記気体流通路として機能する。   A suitable example of the elastic body is a leaf spring. In particular, it is preferable to have a corrugated portion. There is a clearance formed by separating from the laminated unit cell in the portion of the wave-shaped portion that contacts the tube member, while the portion that contacts the laminated unit cell is separated from the tube member. There is a clearance formed. These clearances function as the gas flow path.

また、管部材の長手方向に直交する方向の断面が長穴形状をなすことが好ましい。この場合、保持部材に形成する管部材の差込穴を、長穴形状とすることができる。長穴形状の差込穴は、他の形状の差込穴に比して比較的形成し易い。すなわち、差込穴を形成することが容易となるという利点がある。   Moreover, it is preferable that the cross section of the direction orthogonal to the longitudinal direction of a pipe member makes a long hole shape. In this case, the insertion hole of the tube member formed in the holding member can be formed into a long hole shape. An insertion hole having a long hole shape is relatively easy to form as compared with an insertion hole having another shape. That is, there is an advantage that it is easy to form the insertion hole.

さらに、管部材には、その内部、すなわち、前記液体流通路に指向して突出するボス部を形成することが好ましい。このボス部により、管部材が、体積増加を起こしたラミネート型単電池、又は圧縮された抜け止め部材によって圧潰されることが回避されるので、液体流通路が閉塞されることを防止することができる。   Furthermore, it is preferable to form a boss portion that protrudes toward the inside of the pipe member, that is, toward the liquid flow path. The boss portion prevents the tube member from being crushed by the laminated unit cell having an increased volume or the compressed retaining member, so that the liquid flow path can be prevented from being blocked. it can.

組電池を寒冷地にて使用する場合には、液体が凍結して冷却効果（又は温度調整効果）が低減することを防止するべく、液体として、不凍液が添加された液体を流通させることが好ましい。   When the assembled battery is used in a cold region, it is preferable to circulate a liquid to which an antifreeze is added as a liquid in order to prevent the liquid from freezing and reducing the cooling effect (or temperature adjustment effect). .

本発明においては、複数個のラミネート型単電池を保持して構成される組電池に、液体流通路と気体流通路を設けるようにしている。そして、液体流通路に流通する液体として冷却媒体を選定するとともに、気体流通路に気体を流通させることにより、ラミネート型単電池を効率よく冷却することが可能となる。   In the present invention, a liquid flow path and a gas flow path are provided in an assembled battery configured to hold a plurality of laminated unit cells. And while selecting a cooling medium as a liquid which distribute | circulates to a liquid flow path, it becomes possible to cool a lamination type cell efficiently by distribute | circulating gas to a gas flow path.

しかも、ラミネート型単電池が熱膨張（体積増加）を起こしたとき、これに伴って発生した応力は、ラミネート型単電池と、ラミネート型単電池が挿入された管部材との間に介在する抜け止め部材が圧縮されることによって吸収ないし緩和される。このため、管部材等が破損することを防止することができる。   In addition, when the laminated unit cell undergoes thermal expansion (increase in volume), the stress caused by this is caused by the gap between the laminated unit cell and the tube member in which the laminated unit cell is inserted. The stop member is absorbed or relaxed by being compressed. For this reason, it can prevent that a pipe member etc. are damaged.

以上のように、本発明によれば、十分な冷却効率を確保し得るとともに、構成部材が破損する懸念を払拭し得る。   As described above, according to the present invention, sufficient cooling efficiency can be ensured, and the concern that the constituent members may be damaged can be eliminated.

本実施の形態に係る組電池の概略全体側面図である。It is a schematic whole side view of the assembled battery which concerns on this Embodiment. 図１の組電池の概略平面図である。It is a schematic plan view of the assembled battery of FIG. 図１の組電池の要部分解斜視図である。It is a principal part disassembled perspective view of the assembled battery of FIG. 管部材の長手方向に直交する方向の断面図である。It is sectional drawing of the direction orthogonal to the longitudinal direction of a pipe member. 前記管部材の長手方向に沿う断面図である。It is sectional drawing which follows the longitudinal direction of the said tube member. 図１からラミネート型単電池が膨張して板バネ（抜け止め部材）が圧縮された状態を示す概略全体側面図である。FIG. 2 is a schematic overall side view showing a state in which the laminated cell is expanded from FIG. 1 and the leaf spring (prevention member) is compressed. 別の実施の形態に係る組電池の概略全体側面図である。It is a general | schematic whole side view of the assembled battery which concerns on another embodiment. 図７の組電池の概略平面図である。It is a schematic plan view of the assembled battery of FIG.

以下、本発明に係る組電池につき好適な実施の形態を挙げ、添付の図面を参照して詳細に説明する。   Hereinafter, preferred embodiments of the assembled battery according to the present invention will be described and described in detail with reference to the accompanying drawings.

図１〜図３は、それぞれ、本実施の形態に係る組電池１０の概略全体側面図、概略平面図、要部分解斜視図である。この組電池１０は、保持部材１２、１４と、これら保持部材１２、１４に保持された３本の管部材１６ａ〜１６ｃと、２個のラミネート型単電池１８ａ、１８ｂとを有する。なお、図３においては、保持部材１２、１４を省略して示している。   1 to 3 are a schematic overall side view, a schematic plan view, and an exploded perspective view of a main part of a battery pack 10 according to the present embodiment, respectively. The assembled battery 10 includes holding members 12 and 14, three tube members 16 a to 16 c held by the holding members 12 and 14, and two laminated unit cells 18 a and 18 b. In FIG. 3, the holding members 12 and 14 are omitted.

略四角柱形状をなす保持部材１２の下端面には、有底の係合用凹部２０ａ、２０ｂが陥没形成される。一方、上端面には、略円錐台形状の係合用凸部２２ａ、２２ｂが突出形成される（図２参照）。   On the lower end surface of the holding member 12 having a substantially quadrangular prism shape, bottomed engagement recesses 20a and 20b are formed to be recessed. On the other hand, substantially frustoconical engaging protrusions 22a and 22b are formed to protrude from the upper end surface (see FIG. 2).

保持部材１２には、さらに、保持部材１４を臨む側の端面に３個の長穴２４ａ〜２４ｃが形成される。また、保持部材１２の図１における後方側面上方には、後述する液体を保持部材１２の内部に導入するための導入口２６が形成される（図２参照）。この導入口２６は、保持部材１２の長手方向に沿って延在する液体連通路２８ａを介して長穴２４ａ〜２４ｃに連通する。すなわち、液体連通路２８ａは、長穴２４ａ〜２４ｃの各々に液体が供給されるように分岐している。   The holding member 12 is further formed with three elongated holes 24 a to 24 c on the end surface facing the holding member 14. Further, an inlet 26 for introducing a liquid to be described later into the holding member 12 is formed above the rear side surface of the holding member 12 in FIG. 1 (see FIG. 2). The introduction port 26 communicates with the elongated holes 24 a to 24 c via a liquid communication path 28 a extending along the longitudinal direction of the holding member 12. That is, the liquid communication path 28a is branched so that the liquid is supplied to each of the long holes 24a to 24c.

略四角柱形状をなす保持部材１４にも同様に、下端面に係合用凹部２０ｃ、２０ｄ、上端面に係合用凸部２２ｃ、２２ｄが形成されるとともに、保持部材１２を臨む側の端面に３個の長穴２４ｄ〜２４ｆが形成される（図１参照）。長穴２４ｄ〜２４ｆの高さ位置は、前記長穴２４ａ〜２４ｃの各々の高さ位置に対応する。   Similarly, the holding member 14 having a substantially quadrangular prism shape is formed with engaging concave portions 20c and 20d on the lower end surface, and engaging convex portions 22c and 22d on the upper end surface, and 3 on the end surface facing the holding member 12. The long holes 24d to 24f are formed (see FIG. 1). The height positions of the long holes 24d to 24f correspond to the height positions of the long holes 24a to 24c.

保持部材１４の内部には、液体連通路２８ｂが形成されている。この液体連通路２８ｂは、長穴２４ｄ〜２４ｆの各々に連なり水平方向に向かう水平部位と、各水平部位が合流して鉛直方向に延在する鉛直部位からなる。保持部材１４の図１における前方側面には、液体を導出するための導出口３０が形成され、前記鉛直部位は、この導出口３０に連通する。すなわち、長穴２４ｄ〜２４ｆは、液体連通路２８ｂを介して導出口３０に連通する。   A liquid communication path 28 b is formed inside the holding member 14. The liquid communication path 28b includes a horizontal portion that is continuous with each of the long holes 24d to 24f and that extends in the horizontal direction, and a vertical portion that joins the horizontal portions and extends in the vertical direction. A lead-out port 30 for leading out the liquid is formed on the front side surface of the holding member 14 in FIG. 1, and the vertical portion communicates with the lead-out port 30. That is, the long holes 24d to 24f communicate with the outlet 30 via the liquid communication path 28b.

長穴２４ａ、２４ｄには、管部材１６ａが圧入される。同様に、長穴２４ｂ、２４ｅに管部材１６ｂが圧入され、長穴２４ｃ、２４ｆに管部材１６ｃが圧入される。これにより、管部材１６ａ〜１６ｃが保持部材１２、１４に挟持された状態で保持される。長穴２４ａ〜２４ｃの各高さ位置と、長穴２４ｄ〜２４ｆの各高さ方向位置とが対応しているので、管部材１６ａ〜１６ｃは水平に延在する姿勢となる。すなわち、管部材１６ａ〜１６ｃは、互いに平行となるように並列配置される。   The tube member 16a is press-fitted into the long holes 24a and 24d. Similarly, the pipe member 16b is press-fitted into the long holes 24b and 24e, and the pipe member 16c is press-fitted into the long holes 24c and 24f. Thereby, the pipe members 16a to 16c are held in a state of being held between the holding members 12 and 14. Since the respective height positions of the long holes 24a to 24c correspond to the respective height direction positions of the long holes 24d to 24f, the pipe members 16a to 16c have a posture extending horizontally. That is, the pipe members 16a to 16c are arranged in parallel so as to be parallel to each other.

長穴２４ａ〜２４ｆは、その他の形状の穴に比して、加工によって形成することが比較的容易である。すなわち、管部材１６ａ〜１６ｃの差込穴を長穴形状とする場合、比較的容易に形成することができるという利点がある。   The long holes 24a to 24f are relatively easy to form by processing compared to holes having other shapes. That is, when the insertion holes of the pipe members 16a to 16c are formed into a long hole shape, there is an advantage that they can be formed relatively easily.

長穴２４ａ〜２４ｆに圧入された管部材１６ａ〜１６ｃの端部は、例えば、溶接やロウ付け等によって保持部材１２、１４に接合され、これによりシールがなされた連結部が設けられる。又は、管部材１６ａ〜１６ｃの端部を長穴２４ａ〜２４ｆに圧入した後、この圧入部近傍にシール材を塗布してシール部を設けるようにしてもよい。勿論、前記連結部に対してシール材を塗布するようにしてもよい。   End portions of the pipe members 16a to 16c press-fitted into the long holes 24a to 24f are joined to the holding members 12 and 14 by, for example, welding or brazing, thereby providing a connecting portion that is sealed. Alternatively, after the end portions of the pipe members 16a to 16c are press-fitted into the long holes 24a to 24f, a seal member may be provided in the vicinity of the press-fitted portion to provide a seal portion. Of course, you may make it apply | coat a sealing material with respect to the said connection part.

図４に示すように、管部材１６ａ〜１６ｃの長手方向に直交する方向の断面は、長穴２４ａ〜２４ｆの形状に対応して長穴形状をなす。すなわち、管部材１６ａ〜１６ｃは、下端面及び上端面が略平坦面に、且つ両側面が略半円形状の湾曲面に形成される。   As shown in FIG. 4, the cross section of the direction orthogonal to the longitudinal direction of the pipe members 16a-16c makes a long hole shape corresponding to the shape of the long holes 24a-24f. That is, the pipe members 16a to 16c are formed such that the lower end surface and the upper end surface are substantially flat surfaces, and both side surfaces are substantially semicircular curved surfaces.

管部材１６ａ〜１６ｃはいずれも中空体であり、従って、保持部材１２に形成された液体連通路２８ａと、保持部材１４に形成された液体連通路２８ｂとは、管部材１６ａ〜１６ｃの内部を介して連通する。すなわち、管部材１６ａ〜１６ｃの内部は、液体が流通する液体流通路３２である。   The pipe members 16a to 16c are all hollow bodies. Therefore, the liquid communication path 28a formed in the holding member 12 and the liquid communication path 28b formed in the holding member 14 pass through the inside of the pipe members 16a to 16c. Communicate through. That is, the inside of the pipe members 16a to 16c is a liquid flow passage 32 through which liquid flows.

図２、及び管部材１６ａ（１６ｂ、１６ｃ）の長手方向に沿う断面である図５に示すように、管部材１６ａ（１６ｂ、１６ｃ）の下端面及び上端面には、その内部に指向して突出する複数個のボス部３４が設けられる。各ボス部３４は、管部材１６ａ（１６ｂ、１６ｃ）の内部となるにつれてテーパー状に縮径するような略円錐台形状をなす。これらのボス部３４が存在することにより、後述するように、ラミネート型単電池１８ａ、１８ｂが熱膨張した際に管部材１６ａ〜１６ｃが圧潰されることが回避される。   As shown in FIG. 2 and FIG. 5 which is a cross section along the longitudinal direction of the pipe member 16a (16b, 16c), the lower end surface and the upper end surface of the pipe member 16a (16b, 16c) are directed toward the inside thereof. A plurality of protruding boss portions 34 are provided. Each boss portion 34 has a substantially truncated cone shape that is reduced in diameter in a tapered shape as it becomes the inside of the pipe member 16a (16b, 16c). The presence of these boss portions 34 prevents the tube members 16a to 16c from being crushed when the laminated unit cells 18a and 18b are thermally expanded, as will be described later.

なお、管部材１６ａ（１６ｂ、１６ｃ）の下端面側のボス部３４と、上端面側のボス部３４とは互いに対向する。   The boss portion 34 on the lower end surface side of the pipe member 16a (16b, 16c) and the boss portion 34 on the upper end surface side face each other.

このように構成される管部材１６ａ〜１６ｃは、例えば、アルミニウム、アルミニウム合金、銅又は銅合金等の熱伝導度が大きな金属からなる断面真円形状の管体に対し、プレス成形を施すことによって作製することができる。各ボス部３４も、このプレス成形時に同時に形成することが可能である。   The pipe members 16a to 16c configured as described above are formed by, for example, press-molding a tube having a circular cross section made of a metal having a high thermal conductivity such as aluminum, aluminum alloy, copper, or copper alloy. Can be produced. Each boss part 34 can also be formed simultaneously with the press molding.

ラミネート型単電池１８ａ、１８ｂは、正極活物質、電解質及び負極活物質を、可撓性を示す外装体に封入して構成される。このような構成のラミネート型単電池１８ａ、１８ｂは公知であり、このため、詳細な説明は省略する。   Laminated cell 18a, 18b is comprised by enclosing a positive electrode active material, an electrolyte, and a negative electrode active material in the exterior body which shows flexibility. Laminate type cells 18a and 18b having such a configuration are known, and therefore detailed description thereof is omitted.

ラミネート型単電池１８ａ、１８ｂには、それぞれ、正極用集電タブ、負極用集電タブ（いずれも図示せず）が設けられる。これら正極用集電タブ、負極用集電タブは、図示しない外部負荷、例えば、電動自動車に搭載されたモータに電気的に接続される。   The laminated unit cells 18a and 18b are each provided with a positive electrode current collecting tab and a negative electrode current collecting tab (both not shown). The positive electrode current collecting tab and the negative electrode current collecting tab are electrically connected to an external load (not shown), for example, a motor mounted on an electric vehicle.

ラミネート型単電池１８ａは管部材１６ａ、１６ｂの間に挿入され、ラミネート型単電池１８ｂは管部材１６ｂ、１６ｃの間に挿入される。さらに、管部材１６ａとラミネート型単電池１８ａとの間、及びラミネート型単電池１８ａと管部材１６ｂとの間には、弾性体としての板バネ３６ａ、３６ｂがそれぞれ介装される。これら板バネ３６ａ、３６ｂは、管部材１６ａ〜１６ｃの長手方向に沿って（換言すれば、保持部材１２から保持部材１４に向かって）凸と凹が交互に連なる波形状部を有する。このため、ラミネート型単電池１８ａは、板バネ３６ａ、３６ｂによって管部材１６ａ、１６ｂから離間する方向に弾発付勢されている。   Laminated cell 18a is inserted between tube members 16a and 16b, and laminate cell 18b is inserted between tube members 16b and 16c. Further, leaf springs 36a and 36b as elastic bodies are interposed between the tube member 16a and the laminate type cell 18a and between the laminate type cell 18a and the tube member 16b, respectively. These plate springs 36a and 36b have wave-shaped portions in which convex and concave are alternately arranged along the longitudinal direction of the tube members 16a to 16c (in other words, from the holding member 12 toward the holding member 14). For this reason, the laminate type cell 18a is elastically biased in a direction away from the tube members 16a and 16b by the leaf springs 36a and 36b.

同様に、管部材１６ｂとラミネート型単電池１８ｂとの間、及びラミネート型単電池１８ｂと管部材１６ｃとの間には、それぞれ、板バネ３６ｃ、３６ｄが介装される。これら板バネ３６ｃ、３６ｄは、板バネ３６ａ、３６ｂと同一形状に形成されており、従って、ラミネート型単電池１８ｂは、板バネ３６ｃ、３６ｄによって管部材１６ｂ、１６ｃから離間する方向に弾発付勢される。   Similarly, leaf springs 36c and 36d are interposed between the tube member 16b and the laminate type cell 18b and between the laminate type cell 18b and the tube member 16c, respectively. The leaf springs 36c and 36d are formed in the same shape as the leaf springs 36a and 36b. Therefore, the laminated single battery 18b is elastically applied in a direction away from the tube members 16b and 16c by the leaf springs 36c and 36d. Be forced.

板バネ３６ａ〜３６ｄが楔として機能することにより、ラミネート型単電池１８ａ、１８ｂの管部材１６ａ〜１６ｃからの抜け止めがなされる。換言すれば、板バネ３６ａ〜３６ｄは、抜け止め部材としても機能する。   The leaf springs 36a to 36d function as wedges, thereby preventing the laminate type cells 18a and 18b from coming off from the tube members 16a to 16c. In other words, the leaf springs 36a to 36d also function as retaining members.

板バネ３６ａ〜３６ｄが波形状部を有するため、その長手方向に対して直交する方向には、管部材１６ａ〜１６ｃから所定間隔で離間したクリアランス３８ａ（図１参照）、又はラミネート型単電池１８ａ、１８ｂから所定間隔で離間したクリアランス３８ｂが形成される。これらのクリアランス３８ａ、３８ｂには、大気（気体）が流通することが可能である。すなわち、前記クリアランス３８ａ、３８ｂは気体流通路である。   Since the leaf springs 36a to 36d have corrugated portions, the clearance 38a (see FIG. 1) spaced apart from the tube members 16a to 16c at a predetermined interval or the laminated unit cell 18a in the direction orthogonal to the longitudinal direction. , 18b is formed with a clearance 38b spaced at a predetermined interval. Air (gas) can flow through these clearances 38a and 38b. That is, the clearances 38a and 38b are gas flow paths.

板バネ３６ａ〜３６ｄは、管部材１６ａ〜１６ｃと同様に、アルミニウム、アルミニウム合金、銅又は銅合金等の熱伝導度が大きな金属からなる。   The leaf springs 36a to 36d are made of a metal having a high thermal conductivity such as aluminum, an aluminum alloy, copper, or a copper alloy, similarly to the pipe members 16a to 16c.

組電池１０は、例えば、電動自動車に搭載されてモータ等の外部負荷を付勢する電気駆動源となる。   The assembled battery 10 is, for example, an electric drive source that is mounted on an electric vehicle and energizes an external load such as a motor.

本実施の形態に係る組電池１０は、基本的には以上のように構成されるものであり、次にその作用効果について説明する。   The assembled battery 10 according to the present embodiment is basically configured as described above. Next, the function and effect will be described.

組電池１０は、図１に示す構成のみで用いることが可能であるが、複数個を連結して用いることもできる。この場合、係合用凹部２０ａ〜２０ｄに、別の組電池１０の係合用凸部２２ａ〜２２ｄを圧入する等して係合すればよい。これにより、組電池１０同士を積層することができる。   The assembled battery 10 can be used only with the configuration shown in FIG. In this case, the engagement protrusions 22a to 22d of another assembled battery 10 may be press-fitted into the engagement recesses 20a to 20d. Thereby, the assembled batteries 10 can be stacked.

外部負荷（例えば、モータ）を付勢するとき、ラミネート型単電池１８ａ、１８ｂは放電状態となる。すなわち、ラミネート型単電池１８ａ、１８ｂ内では放電反応が生じ、これに伴ってラミネート型単電池１８ａ、１８ｂの温度が上昇するとともに、図６に示すように、該ラミネート型単電池１８ａ、１８ｂが熱膨張（体積増加）を起こす。   When energizing an external load (for example, a motor), the laminate type cells 18a and 18b are discharged. That is, a discharge reaction occurs in the laminated unit cells 18a and 18b, and accordingly, the temperature of the laminated unit cells 18a and 18b rises. As shown in FIG. 6, the laminated unit cells 18a and 18b Causes thermal expansion (volume increase).

ここで、保持部材１２の液体連通路２８ａには、導入口２６を介して、液体としての冷却媒体（例えば、冷却水）が供給される。冷却媒体は、液体連通路２８ａから長穴２４ａ〜２４ｃに分配され、さらに、管部材１６ａ〜１６ｃの液体流通路３２を流通する。冷却媒体は、その後、長穴２４ｄ〜２４ｆを経て液体連通路２８ｂに合流し、導出口３０から保持部材１４の外部に導出される。   Here, a cooling medium (for example, cooling water) as a liquid is supplied to the liquid communication path 28 a of the holding member 12 through the introduction port 26. The cooling medium is distributed from the liquid communication path 28a to the long holes 24a to 24c, and further flows through the liquid flow path 32 of the pipe members 16a to 16c. Thereafter, the cooling medium joins the liquid communication path 28b through the long holes 24d to 24f, and is led out of the holding member 14 through the outlet 30.

図１及び図６から諒解されるように、板バネ３６ａ、３６ｂの一部は管部材１６ａ又は管部材１６ｂに当接し、別の一部はラミネート型単電池１８ａに当接している。同様に、板バネ３６ｃ、３６ｄの一部は管部材１６ｂ又は管部材１６ｃに当接し、別の一部はラミネート型単電池１８ｂに当接している。しかも、板バネ３６ａ〜３６ｄ及び管部材１６ａ〜１６ｃは、好適にはアルミニウム、アルミニウム合金、銅又は銅合金等の熱伝導度が大きな金属からなる。このため、ラミネート型単電池１８ａ、１８ｂが熱を帯びた場合、この熱は、板バネ３６ａ〜３６ｄ及び管部材１６ａ〜１６ｃを介して前記冷却媒体に速やかに除去される。   As can be understood from FIGS. 1 and 6, a part of the leaf springs 36a and 36b is in contact with the tube member 16a or the tube member 16b, and another part is in contact with the laminated unit cell 18a. Similarly, a part of the leaf springs 36c and 36d is in contact with the tube member 16b or the tube member 16c, and another part is in contact with the laminated unit cell 18b. Moreover, the leaf springs 36a to 36d and the pipe members 16a to 16c are preferably made of a metal having a high thermal conductivity such as aluminum, aluminum alloy, copper, or copper alloy. For this reason, when the laminated unit cells 18a and 18b are heated, the heat is quickly removed to the cooling medium via the leaf springs 36a to 36d and the tube members 16a to 16c.

しかも、板バネ３６ａ〜３６ｄと管部材１６ａ〜１６ｃとの間にはクリアランス３８ａが形成され、ラミネート型単電池１８ａ、１８ｂとの間にはクリアランス３８ｂが形成される。これらのクリアランス３８ａ、３８ｂには、大気（気体）が流通する。なお、クリアランス３８ａ、３８ｂには自然風を流通させるようにしてもよいし、ファン等で発生させた強制風を流通させるようにしてもよい。   Moreover, a clearance 38a is formed between the leaf springs 36a to 36d and the tube members 16a to 16c, and a clearance 38b is formed between the laminate type cells 18a and 18b. The atmosphere (gas) flows through these clearances 38a and 38b. Natural air may be circulated through the clearances 38a and 38b, or forced air generated by a fan or the like may be circulated.

以上のように、管部材１６ａ〜１６ｃの液体流通路３２に冷却媒体が流通し、且つクリアランス３８ａ、３８ｂに気体（大気ないし風）が流通する。この二重冷却により、ラミネート型単電池１８ａ、１８ｂから熱を効率よく除去することができ、結局、これらラミネート型単電池１８ａ、１８ｂを効率よく冷却することができる。   As described above, the cooling medium flows through the liquid flow paths 32 of the pipe members 16a to 16c, and the gas (atmosphere or wind) flows through the clearances 38a and 38b. By this double cooling, heat can be efficiently removed from the laminate type single cells 18a, 18b, and eventually, these laminate type single cells 18a, 18b can be efficiently cooled.

電動自動車が寒冷地で使用される場合、保持部材１２の導入口２６に対し、不凍液が添加された液体を供給するようにすればよい。これにより冷却媒体が凍結することが回避されるので、寒冷地においても、冷却媒体によるラミネート型単電池１８ａ、１８ｂへの冷却がなされる。すなわち、ラミネート型単電池１８ａ、１８ｂを効率よく冷却することが可能である。   When the electric automobile is used in a cold region, the liquid to which the antifreeze liquid is added may be supplied to the inlet 26 of the holding member 12. As a result, the cooling medium is prevented from freezing, so that the laminated unit cells 18a and 18b are cooled by the cooling medium even in a cold region. That is, the laminated unit cells 18a and 18b can be efficiently cooled.

ラミネート型単電池１８ａ、１８ｂが上記したように熱膨張を起こしたときには、この熱膨張に対応し、ラミネート型単電池１８ａに隣接する板バネ３６ａ、３６ｂが圧縮されるとともに、ラミネート型単電池１８ｂに隣接する板バネ３６ｃ、３６ｄが圧縮される。ラミネート型単電池１８ａ、１８ｂが体積増加を起こすことによって生じ、板バネ３６ａ〜３６ｄに作用した応力は、この圧縮によって吸収ないし緩和される。このため、管部材１６ａ〜１６ｃ及びラミネート型単電池１８ａ、１８ｂに応力が作用することが回避され、その結果、管部材１６ａ〜１６ｃ及びラミネート型単電池１８ａ、１８ｂが破損したり、管部材１６ａ〜１６ｃと保持部材１２、１４との連結箇所の接合強度ないしシール強度が低下したりすることが防止される。   When the laminate type single cells 18a and 18b are thermally expanded as described above, the leaf springs 36a and 36b adjacent to the laminate type single cell 18a are compressed, and the laminate type single cell 18b corresponds to the thermal expansion. The leaf springs 36c and 36d adjacent to are compressed. Stress caused by the increase in volume of the laminated unit cells 18a and 18b and acting on the leaf springs 36a to 36d is absorbed or relaxed by this compression. For this reason, it is avoided that stress acts on the tube members 16a to 16c and the laminated unit cells 18a and 18b. As a result, the tube members 16a to 16c and the laminated unit cells 18a and 18b are damaged, or the tube member 16a. It is possible to prevent the bonding strength or the sealing strength of the connecting portion between ˜16c and the holding members 12 and 14 from being lowered.

加えて、ラミネート型単電池１８ａ、１８ｂが体積増加を起こすのみであり、組電池１０の全体が体積増加を起こすことがない。従って、組電池１０の搭載スペースにつき、該組電池１０が体積増加を起こすことを考慮して設定する必要は特にない。このため、組電池１０の配置レイアウトの自由度が向上する。   In addition, the laminate type single cells 18a and 18b only increase in volume, and the entire assembled battery 10 does not increase in volume. Therefore, it is not particularly necessary to set the mounting space of the assembled battery 10 in consideration of the volume increase of the assembled battery 10. For this reason, the freedom degree of the arrangement layout of the assembled battery 10 improves.

板バネ３６ａ〜３６ｄが圧縮されたとき、場合によっては、管部材１６ａ〜１６ｃにさらに応力が作用することも考えられる。しかしながら、本実施の形態では、管部材１６ａ〜１６ｃの各々に、液体流通路３２に向かって突出するボス部３４を複数個形成している。このため、管部材１６ａ〜１６ｃが圧潰されることが困難となる。仮に圧潰されたとしても、互いに対向するボス部３４、３４の頂面同士が当接した後は、管部材１６ａ〜１６ｃがそれ以上圧潰されることはない。従って、冷却媒体は、ボス部３４の間のクリアランスを介して流通することが可能である。以上のような理由から、液体流通路３２が閉塞されることが回避される。   When the leaf springs 36a to 36d are compressed, it may be considered that further stress acts on the tube members 16a to 16c in some cases. However, in the present embodiment, a plurality of boss portions 34 projecting toward the liquid flow passage 32 are formed in each of the tube members 16a to 16c. For this reason, it becomes difficult for the pipe members 16a to 16c to be crushed. Even if it is crushed, the tube members 16a to 16c are not further crushed after the top surfaces of the boss portions 34, 34 facing each other come into contact with each other. Therefore, the cooling medium can flow through the clearance between the boss portions 34. For the reasons described above, the liquid flow passage 32 is prevented from being blocked.

このため、板バネ３６ａ〜３６ｄの圧縮の度合いに関わらず、管部材１６ａ〜１６ｃの内部（液体流通路３２）を冷却媒体が流通することが可能となる。これにより、ラミネート型単電池１８ａ、１８ｂに対する冷却効率を確保することができる。   For this reason, regardless of the degree of compression of the leaf springs 36a to 36d, the cooling medium can flow through the inside of the pipe members 16a to 16c (liquid flow passage 32). Thereby, the cooling efficiency with respect to the laminate type cells 18a and 18b can be secured.

勿論、ラミネート型単電池１８ａ、１８ｂが熱膨張を起こした際も、板バネ３６ａ〜３６ｄが抜け止め部材として機能する。これにより、ラミネート型単電池１８ａ、１８ｂの管部材１６ａ〜１６ｃからの抜け止めがなされる。   Of course, the leaf springs 36a to 36d function as retaining members even when the laminated unit cells 18a and 18b are thermally expanded. As a result, the laminated unit cells 18a and 18b are prevented from coming off from the tube members 16a to 16c.

放電状態が継続されてラミネート型単電池１８ａ、１８ｂの容量が所定の閾値となるに至ると、ラミネート型単電池１８ａ、１８ｂに対して充電がなされる。この際、ラミネート型単電池１８ａ、１８ｂが収縮を起こすとともに、板バネ３６ａ〜３６ｄが、その弾性作用によって伸張して元の形状に戻る。勿論、この際にも組電池１０の全体の体積減少が起こることが回避される。   When the discharge state is continued and the capacity of the laminate type single cells 18a, 18b reaches a predetermined threshold, the laminate type single cells 18a, 18b are charged. At this time, the laminate type single cells 18a and 18b contract, and the leaf springs 36a to 36d are expanded by the elastic action to return to the original shape. Of course, the reduction in the entire volume of the battery pack 10 is also avoided at this time.

本発明は、上記した実施の形態に特に限定されるものではなく、その要旨を逸脱しない範囲で種々の変更が可能である。   The present invention is not particularly limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention.

例えば、図７及び図８に示すように、管部材１６ａ（１６ｂ、１６ｃ）の長手方向に対して直交する方向に沿って延在し、略長穴形状をなすボス部４０ａ〜４０ｆを設けるようにしてもよい。ここで、ボス部４０ａ、４０ｄは互いに対向し、同様に、ボス部４０ｂ、４０ｅが対向するとともに、ボス部４０ｃ、４０ｆが対向する。   For example, as shown in FIGS. 7 and 8, boss portions 40a to 40f extending along a direction orthogonal to the longitudinal direction of the pipe member 16a (16b, 16c) and having a substantially long hole shape are provided. It may be. Here, the boss portions 40a and 40d face each other. Similarly, the boss portions 40b and 40e face each other, and the boss portions 40c and 40f face each other.

この場合、図７に示すように、板バネ４２ａと板バネ４２ｂでは位相が逆に設定され、同様に、板バネ４２ｃと板バネ４２ｄの位相も逆に設定される。そして、板バネ４２ａ〜４２ｄの頂部の位置が、ボス部４０ａ〜４０ｆの位置に対応している。すなわち、板バネ４２ａ〜４２ｄの頂部が、ボス部４０ａ〜４０ｆに若干挿入される。これにより、板バネ４２ａ〜４２ｄを堅牢に位置決め固定することができる。   In this case, as shown in FIG. 7, the phases of the leaf spring 42a and the leaf spring 42b are set to be opposite, and similarly, the phases of the leaf spring 42c and the leaf spring 42d are also set to be opposite. And the position of the top part of leaf | plate springs 42a-42d respond | corresponds to the position of the boss | hub parts 40a-40f. That is, the top portions of the leaf springs 42a to 42d are slightly inserted into the boss portions 40a to 40f. Accordingly, the leaf springs 42a to 42d can be firmly positioned and fixed.

また、板バネ３６ａ（４２ａ）、３６ｂ（４２ｂ）の中のいずれか一方や、板バネ３６ｃ（４２ｃ）、３６ｄ（４２ｄ）の中のいずれか一方を省略し、ラミネート型単電池１８ａ、１８ｂを管部材１６ａ〜１６ｃに直接当接させるようにしてもよい。この場合、管部材１６ａ〜１６ｃは、弾性に優れたものであることが好ましい。   Also, either one of the leaf springs 36a (42a) and 36b (42b) or one of the leaf springs 36c (42c) and 36d (42d) is omitted, and the laminated unit cells 18a and 18b are removed. You may make it contact | abut directly to the pipe members 16a-16c. In this case, it is preferable that the pipe members 16a to 16c are excellent in elasticity.

また、この実施の形態では、２個のラミネート型単電池１８ａ、１８ｂと３個の管部材１６ａ〜１６ｃを具備する組電池１０を例示しているが、ラミネート型単電池及び管部材の個数がそれ以上であってもよいことはいうまでもない。   Further, in this embodiment, the assembled battery 10 including the two laminated unit cells 18a and 18b and the three tube members 16a to 16c is illustrated, but the number of the laminated unit cells and the tube members is the same. Needless to say, it may be more than that.

さらに、場合によっては、液体連通路２８ａ、２８ｂ及び液体流通路３２に対し、加温のための加温媒体を流通させるようにしてもよい。この際には、加温媒体によってラミネート型単電池１８ａ、１８ｂの温度を容易に調整することができる。   Further, in some cases, a heating medium for heating may be circulated through the liquid communication passages 28a and 28b and the liquid flow passage 32. At this time, the temperature of the laminated unit cells 18a and 18b can be easily adjusted by the heating medium.

１０…組電池 １２、１４…保持部材
１６ａ〜１６ｃ…管部材 １８ａ、１８ｂ…ラミネート型単電池
２４ａ〜２４ｆ…長穴 ２６…導入口
２８ａ、２８ｂ…液体連通路 ３０…導出口
３２…液体流通路 ３４、４０ａ〜４０ｆ…ボス部
３６ａ〜３６ｄ、４２ａ〜４２ｄ…板バネ
３８ａ、３８ｂ…クリアランス DESCRIPTION OF SYMBOLS 10 ... Battery assembly 12, 14 ... Holding member 16a-16c ... Pipe member 18a, 18b ... Laminated cell 24a-24f ... Long hole 26 ... Inlet 28a, 28b ... Liquid communication path 30 ... Outlet 32 ... Liquid flow path 34, 40a-40f ... Boss portions 36a-36d, 42a-42d ... Leaf springs 38a, 38b ... Clearance

Claims (6)

複数個のラミネート型単電池を保持して構成される組電池であって、
液体が流通する液体流通路が内部に形成された複数個の管部材を平行に並列配置した状態で保持するとともに、前記液体流通路に連通する液体連通路が形成された保持部材を有し、
各々のラミネート型単電池が、前記複数個の管部材中の隣接する２本の間に挿入され、
さらに、前記ラミネート型単電池と、前記２本の管部材中の少なくとも１本との間に介装されて前記ラミネート型単電池の前記管部材からの抜け止めをなし、且つ前記ラミネート型単電池と前記管部材との間に気体が流通可能となる気体流通路が形成された抜け止め部材を備えることを特徴とする組電池。 An assembled battery configured by holding a plurality of laminated unit cells,
A liquid flow passage through which liquid flows is held in a state in which a plurality of pipe members formed therein are arranged in parallel and has a holding member in which a liquid communication passage communicating with the liquid flow passage is formed,
Each laminated unit cell is inserted between two adjacent ones of the plurality of tube members,
Further, the laminate type unit cell is interposed between the laminate type unit cell and at least one of the two tube members to prevent the laminate type unit cell from being detached from the tube member, and the laminate type unit cell. A battery assembly comprising a retaining member formed with a gas flow passage through which gas can flow between the tube member and the tube member. 請求項１記載の組電池において、前記抜け止め部材が弾性体であることを特徴とする組電池。   2. The assembled battery according to claim 1, wherein the retaining member is an elastic body. 請求項２記載の組電池において、前記抜け止め部材が波形状部を有する板バネからなることを特徴とする組電池。   3. The assembled battery according to claim 2, wherein the retaining member comprises a leaf spring having a wave shape portion. 請求項１〜３のいずれか１項に記載の組電池において、前記管部材に、前記液体流通路に指向して突出するボス部が形成されていることを特徴とする組電池。   4. The assembled battery according to claim 1, wherein a boss portion that protrudes toward the liquid flow path is formed on the tube member. 5. 請求項１〜４のいずれか１項に記載の組電池において、前記管部材の長手方向に直交する方向の断面が長穴形状をなすことを特徴とする組電池。   The assembled battery according to any one of claims 1 to 4, wherein a cross section in a direction orthogonal to a longitudinal direction of the tube member has an elongated hole shape. 請求項１〜５のいずれか１項に記載の組電池において、前記液体として不凍液が添加された液体が流通することを特徴とする組電池。   The assembled battery according to any one of claims 1 to 5, wherein a liquid to which an antifreeze liquid is added flows as the liquid.
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