JP2010287508A

JP2010287508A - Battery pack

Info

Publication number: JP2010287508A
Application number: JP2009141581A
Authority: JP
Inventors: Takuro Kamata; 太久郎鎌田; Kenji Tsukamoto; 謙二塚本
Original assignee: Honda Motor Co Ltd
Current assignee: Honda Motor Co Ltd
Priority date: 2009-06-12
Filing date: 2009-06-12
Publication date: 2010-12-24

Abstract

PROBLEM TO BE SOLVED: To provide a battery pack in which a battery support structure with high strength can be obtained. SOLUTION: The battery pack is provided with a first battery assembly 10 consisting of a plurality of battery cells 11, a second battery assembly 20 which is installed adjacent to the first battery assembly 10 and consists of a plurality of battery cells 21, a first support member 30 which supports the bottom face of the battery cells 11 of the first battery assembly 10, a second support member 40 which supports the bottom face of the second battery cells 21 of the second battery assembly 20, and a coupling member 50 which couples the first support member 30 and the second support member 40. By combining the first support member 30, the second support member 40, and the first coupling member 50, a closed cross-section Q1 is formed. COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は、ハイブリッド自動車を含む電気自動車等に搭載される組電池に関する。 The present invention relates to an assembled battery mounted on an electric vehicle including a hybrid vehicle.

電気自動車等に搭載される二次電池は、例えば、電池セルを水平方向に積層して構成されたバッテリモジュールを、ロワーケース上にボルトを介して固定するとともに、外部荷重と絶縁の目的でバッテリモジュールをカバーで覆う構造が提案されている（特許文献１，２参照）。 A secondary battery mounted on an electric vehicle or the like is, for example, a battery module configured by stacking battery cells in a horizontal direction, fixed on a lower case via a bolt, and used for the purpose of external load and insulation. The structure which covers a module with a cover is proposed (refer patent documents 1 and 2).

特開２００６−２３６８２６号公報（図３，図１０）Japanese Patent Laying-Open No. 2006-236826 (FIGS. 3 and 10) 特開２００３−２４９２０２号公報（図４）Japanese Patent Laying-Open No. 2003-249202 (FIG. 4)

しかしながら、バッテリモジュール全体の荷重をロワーケースのみで受けるため、ロワーケースの強度が必要となり、結果的に重量が増加するという問題があった。 However, since the load of the entire battery module is received only by the lower case, the strength of the lower case is required, resulting in a problem that the weight increases.

本発明は、前記従来の課題を解決するものであり、高い強度の電池保持構造を得ることができる組電池を提供することを目的とする。 The present invention solves the above-described conventional problems, and an object of the present invention is to provide an assembled battery capable of obtaining a high-strength battery holding structure.

本発明は、複数の電池セルからなる第１の電池集合体と、前記第１の電池集合体に隣接して設置され、複数の電池セルからなる第２の電池集合体と、前記第１の電池集合体の電池セルの底面を保持する第１の保持部材と、前記第２の電池集合体の電池セルの底面を保持する第２の保持部材と、前記第１の保持部材と前記第２の保持部材を連結する第１の連結部材と、を備え、前記第１の保持部材および前記第２の保持部材と、前記第１の連結部材とを組み合わせることにより閉断面を形成したことを特徴とする。 The present invention provides a first battery assembly comprising a plurality of battery cells, a second battery assembly comprising a plurality of battery cells installed adjacent to the first battery assembly, and the first battery assembly. A first holding member that holds the bottom surface of the battery cells of the battery assembly; a second holding member that holds the bottom surface of the battery cells of the second battery assembly; the first holding member; A first connecting member for connecting the first holding member, and a closed cross section is formed by combining the first holding member, the second holding member, and the first connecting member. And

本発明によれば、第１の保持部材と第２の保持部材と第１の連結部材とで閉断面を形成することにより、各電池セルを高い強度で保持することが可能になる。よって、重量の重い保持部材を用いることなく、板状の部材を組み合わせるだけで強度の高い保持構造を得ることができる。 According to the present invention, each battery cell can be held with high strength by forming a closed cross section with the first holding member, the second holding member, and the first connecting member. Therefore, a high-strength holding structure can be obtained only by combining plate-like members without using a heavy holding member.

また、前記第１の電池集合体および前記第２の電池集合体において、それぞれの前記電池セルが隙間を設けて配置され、前記第１の保持部材および前記第２の保持部材には、前記隙間と対応する位置に通風孔が形成されていることを特徴とする。 Further, in the first battery assembly and the second battery assembly, each of the battery cells is provided with a gap, and the first holding member and the second holding member include the gap. Ventilation holes are formed at positions corresponding to.

これによれば、例えば、電池セルからの熱が通風孔を介して排出されるので、電池セル間で空気が淀むことがなくなり、熱がこもるのを防止することが可能になる。 According to this, for example, since heat from the battery cells is discharged through the ventilation holes, air does not stagnate between the battery cells, and it is possible to prevent heat from being accumulated.

また、前記第１の電池集合体の電池セルの上面を保持する第３の保持部材と、前記第２の電池集合体の電池セルの上面を保持する第４の保持部材と、前記第３の保持部材と前記第４の保持部材とを連結する第２の連結部材と、を備え、前記第３の保持部材および前記第４の保持部材と、前記第２の連結部材とを組み合わせることにより閉断面を形成したことを特徴とする。 A third holding member for holding an upper surface of the battery cell of the first battery assembly; a fourth holding member for holding an upper surface of the battery cell of the second battery assembly; A second connecting member that connects the holding member and the fourth holding member, and is closed by combining the third holding member, the fourth holding member, and the second connecting member. A cross section is formed.

これによれば、電池セルの底面と上面の双方に閉断面が形成されることで、各電池セルをさらに高い強度で保持することができるとともに、組電池の高さ方向に対する制約を緩和することが可能になる。つまり、組電池の高さ寸法を長くして（例えば、縦長の組電池を設けて）、組電池の重心が高くなるように設計したとしても、組電池を安定して保持することが可能になる。 According to this, since the closed cross section is formed on both the bottom surface and the top surface of the battery cell, each battery cell can be held with higher strength, and the restriction on the height direction of the assembled battery can be relaxed. Is possible. In other words, even when the height of the assembled battery is increased (for example, a vertically long assembled battery is provided) so that the center of gravity of the assembled battery is increased, the assembled battery can be stably held. Become.

また、前記第１の電池集合体の電池セルの上面を保持する第３の保持部材と、前記第２の電池集合体の電池セルの上面を保持する第４の保持部材と、前記第３の保持部材と前記第４の保持部材を連結する第２の連結部材と、を備え、前記第３の保持部材および前記第４の保持部材と、前記第２の連結部材とを組み合わせることにより閉断面を形成し、前記第１の電池集合体および前記第２の電池集合体において、それぞれの前記電池セルが隙間を設けて配置され、前記第３の保持部材および前記第４の保持部材には、前記隙間と対応する位置に通風孔が形成されていることを特徴とする。 A third holding member for holding an upper surface of the battery cell of the first battery assembly; a fourth holding member for holding an upper surface of the battery cell of the second battery assembly; A holding member and a second connecting member that connects the fourth holding member, and a closed cross-section by combining the third holding member, the fourth holding member, and the second connecting member. In the first battery assembly and the second battery assembly, each of the battery cells is disposed with a gap between the third holding member and the fourth holding member. Ventilation holes are formed at positions corresponding to the gaps.

これによれば、電池セルの底面と上面の双方に閉断面が形成されることで、各電池セルをさらに高い強度で保持することができるとともに、組電池の高さ方向に対する制約を緩和することが可能になり、さらに閉断面を冷却風の通路として利用できる。 According to this, since the closed cross section is formed on both the bottom surface and the top surface of the battery cell, each battery cell can be held with higher strength, and the restriction on the height direction of the assembled battery can be relaxed. In addition, the closed cross section can be used as a cooling air passage.

例えば、第３の保持部材と第４の保持部材と第２の連結部材とで形成された閉断面、通風孔、電池セル間の隙間、通風孔、および第１の保持部材と第２の保持部材と第１の連結部材とで形成された閉断面に冷却風を通流させることができる。 For example, the closed cross section formed by the third holding member, the fourth holding member, and the second connecting member, the ventilation hole, the gap between the battery cells, the ventilation hole, and the first holding member and the second holding. Cooling air can be passed through the closed cross section formed by the member and the first connecting member.

また、いずれか一方の前記閉断面の下流側に冷却ファンを設けることを特徴とする。 In addition, a cooling fan is provided on the downstream side of any one of the closed cross sections.

これによれば、例えば、第３の保持部材と第４の保持部材と第２の連結部材とで構成された閉断面の下流側に冷却ファンを設けることにより、冷却風の通流を向上させることができる。 According to this, for example, by providing the cooling fan on the downstream side of the closed cross section formed by the third holding member, the fourth holding member, and the second connecting member, the flow of the cooling air is improved. be able to.

本発明によれば、高い強度の電池保持構造を得ることができる組電池を提供できる。 ADVANTAGE OF THE INVENTION According to this invention, the assembled battery which can obtain a high intensity | strength battery holding structure can be provided.

本実施形態の組電池を示す外観斜視図である。It is an external appearance perspective view which shows the assembled battery of this embodiment. 図１のＡ−Ａ線断面図である。It is the sectional view on the AA line of FIG. 図２の一部拡大断面図である。It is a partially expanded sectional view of FIG. 図１のＢ−Ｂ線断面図である。It is the BB sectional view taken on the line of FIG. 本実施形態の組電池の底側の主要部を示す分解斜視図である。It is a disassembled perspective view which shows the principal part of the bottom side of the assembled battery of this embodiment. 本実施形態の組電池の上側の主要部を示す分解斜視図である。It is a disassembled perspective view which shows the main part of the upper side of the assembled battery of this embodiment. 冷却風の流れを示す縦断面図である。It is a longitudinal cross-sectional view which shows the flow of cooling air. 本実施形態の組電池を車両に搭載したときの一例を示す斜視図である。It is a perspective view which shows an example when the assembled battery of this embodiment is mounted in a vehicle. 本実施形態の組電池において、冷却風の流れを模式的に示す図である。It is a figure which shows typically the flow of a cooling wind in the assembled battery of this embodiment. （ａ）、（ｂ）はそれぞれ他の実施形態の組電池を示す断面図である。(A), (b) is sectional drawing which shows the assembled battery of other embodiment, respectively.

以下、本発明の実施形態に係る組電池１について図１ないし図１０を参照して説明する。
図１に示すように、本実施形態の組電池１は、第１の電池集合体１０（図２参照）、第２の電池集合体２０（図２参照）、第１の保持部材３０、第２の保持部材４０、第１の連結部材５０、第３の保持部材６０、第４の保持部材７０、第２の連結部材８０などで構成されている。なお、以下に示す本実施形態の組電池１は、車両Ｖ（図８参照）に搭載されるものであり、図１において上下方向が車両Ｖの上下方向（重力方向、鉛直方向）に相当し、図示左右方向（長手方向）が車両Ｖの車幅方向に相当し、図示前後方向が車両Ｖの前後方向に相当するものとして説明する。 Hereinafter, an assembled battery 1 according to an embodiment of the present invention will be described with reference to FIGS. 1 to 10.
As shown in FIG. 1, the assembled battery 1 of the present embodiment includes a first battery assembly 10 (see FIG. 2), a second battery assembly 20 (see FIG. 2), a first holding member 30, and a first holding member 30. 2 holding members 40, a first connecting member 50, a third holding member 60, a fourth holding member 70, a second connecting member 80, and the like. In addition, the assembled battery 1 of this embodiment shown below is mounted in the vehicle V (refer FIG. 8), and the up-down direction corresponds to the up-down direction (gravity direction, vertical direction) of the vehicle V in FIG. In the following description, the illustrated left-right direction (longitudinal direction) corresponds to the vehicle width direction of the vehicle V, and the illustrated front-rear direction corresponds to the front-rear direction of the vehicle V.

また、本実施形態の組電池１では、第１の保持部材３０と第２の保持部材４０と第１の連結部材５０とが組み合わされたものが、第１の電池集合体１０および第２の電池集合体２０の底面側に設けられ、第３の保持部材６０と第４の保持部材７０と第２の連結部材８０とが組み合わされたものが、第１の電池集合体１０および第２の電池集合体２０の上面側に設けられている。 Moreover, in the assembled battery 1 of this embodiment, what combined the 1st holding member 30, the 2nd holding member 40, and the 1st connection member 50 is the 1st battery assembly 10 and the 2nd. The combination of the third holding member 60, the fourth holding member 70, and the second connecting member 80 provided on the bottom surface side of the battery assembly 20 is the first battery assembly 10 and the second battery assembly 10. It is provided on the upper surface side of the battery assembly 20.

図２に示すように、第１の電池集合体１０は、複数の電池セル１１（単電池）が車幅方向（図示左右方向）に一列に並んで配置されて構成されている。電池セル１１は、角形（角柱形）のものであり、リチウムイオンやニッケル水素などの充電可能な二次電池で構成されている。また、第２の電池集合体２０は、電池セル１１と同様に構成された複数の電池セル２１（単電池）が車幅方向に一列に並び、かつ、第１の電池集合体１０の各電池セル１１に隣接して配置されている。すなわち、第１の電池集合体１０と第２の電池集合体とが同じ高さ位置において、各電池セル２１が、各電池セル１１に対して前後方向において重なる位置に配置されている。このように、第１の電池集合体１０と第２の電池集合体２０とが車幅方向に沿って２列になって配置されている。 As shown in FIG. 2, the first battery assembly 10 includes a plurality of battery cells 11 (unit cells) arranged in a line in the vehicle width direction (the left-right direction in the drawing). The battery cell 11 has a rectangular (prism-shaped) shape, and is composed of a rechargeable secondary battery such as lithium ion or nickel hydride. The second battery assembly 20 includes a plurality of battery cells 21 (single cells) configured in the same manner as the battery cells 11 arranged in a line in the vehicle width direction, and each battery of the first battery assembly 10. It is arranged adjacent to the cell 11. That is, each battery cell 21 is disposed at a position overlapping each battery cell 11 in the front-rear direction at the same height position of the first battery assembly 10 and the second battery assembly. In this way, the first battery assembly 10 and the second battery assembly 20 are arranged in two rows along the vehicle width direction.

また、電池セル１１と電池セル１１との間には、セパレータＳＰ１が設けられている。なお、並び方向（車幅方向）の両端部に位置する電池セル１１は、後記するエンドプレート１８と電池セル１１との間にセパレータＳＰ１が設けられている（一方のみ図示）。 A separator SP 1 is provided between the battery cells 11. In addition, the battery cell 11 located in the both ends of the arrangement direction (vehicle width direction) is provided with a separator SP1 between the end plate 18 and the battery cell 11 described later (only one is shown).

また、電池セル２１と電池セル２１との間にも、同様にして、セパレータＳＰ２が設けられている。また、並び方向（車幅方向）の両端部に位置する電池セル２１と後記するエンドプレート１９との間にもセパレータＳＰ２が設けられている（一方のみ図示）。 Similarly, a separator SP 2 is provided between the battery cells 21. A separator SP2 is also provided between the battery cells 21 located at both ends in the arrangement direction (vehicle width direction) and an end plate 19 described later (only one is shown).

図３に示すように、セパレータＳＰ１は、ゴムなどの絶縁性を有する材料で形成され、薄板状のシートｓ１の両面に、図３の紙面に対して直交する方向に貫通する流路（隙間）ｓ２が形成されている。この流路ｓ２は、冷却風が流れて電池セル１１を冷却する流路であり、電池セル１１の上部から下部に至るまで連通して形成されている（図６参照）。なお、流路ｓ２は、直線状に貫通するものに限定されず、シートｓ１の両面に千鳥状の突起が形成されて流路が蛇行するように形成されたものでもよく、電池セル１１を冷却できる構成であれば、各種の構成を採用することができる。また、セパレータＳＰ２についてもセパレータＳＰ１と同様な流路（隙間）が形成されている。 As shown in FIG. 3, the separator SP1 is formed of an insulating material such as rubber, and the flow path (gap) penetrates both surfaces of the thin sheet s1 in a direction perpendicular to the paper surface of FIG. s2 is formed. The flow path s2 is a flow path for cooling the battery cell 11 by the flow of cooling air, and is formed to communicate from the upper part to the lower part of the battery cell 11 (see FIG. 6). Note that the flow path s2 is not limited to the one that penetrates in a straight line, and may be one in which staggered protrusions are formed on both surfaces of the sheet s1 so that the flow path meanders, and the battery cell 11 is cooled. Various configurations can be adopted as long as the configurations are possible. The separator SP2 also has a flow path (gap) similar to that of the separator SP1.

図４に示すように、第１の電池集合体１０の電池セル１１は、その一側面の上部と下部に端子１１ａ，１１ｂが後方に向けて突出して形成されている。また、第２の電池集合体２０の各電池セル２１は、前記一側面とは反対側の一側面の上部と下部に端子２１ａ，２１ｂが前方に向けて突出して形成されている。 As shown in FIG. 4, the battery cell 11 of the first battery assembly 10 is formed such that terminals 11 a and 11 b protrude rearward at the upper and lower portions of one side surface. Further, each battery cell 21 of the second battery assembly 20 is formed with terminals 21a and 21b projecting forward on the upper and lower portions of one side opposite to the one side.

また、第１の電池集合体１０および第２の電池集合体２０は、前後方向でバスバプレート１２とバスバプレート１３とで挟持されている。なお、バスバプレート１２，１３は、例えば、ポリプロピレン等の樹脂材料によって板状に形成されている。 Further, the first battery assembly 10 and the second battery assembly 20 are sandwiched between the bus bar plate 12 and the bus bar plate 13 in the front-rear direction. The bus bar plates 12 and 13 are formed in a plate shape from a resin material such as polypropylene, for example.

また、バスバプレート１２の上部には、開口部１２ａが形成され、下部には開口部１２ｂが形成され、開口部１２ａ，１２ｂ内に電池セル１１の端子１１ａ，１１ｂが突出している。なお、バスバプレート１３の上部と下部にも同様にして、開口部１３ａ，１３ｂが形成され、この開口部１３ａ，１３ｂ内に電池セル２１の端子２１ａ，２１ｂが突出している。 Moreover, the opening part 12a is formed in the upper part of the bus bar plate 12, the opening part 12b is formed in the lower part, and the terminals 11a and 11b of the battery cell 11 protrude in the opening parts 12a and 12b. Similarly, openings 13a and 13b are formed in the upper and lower portions of the bus bar plate 13, and the terminals 21a and 21b of the battery cell 21 protrude into the openings 13a and 13b.

また、バスバプレート１２の外側には、端子１１ａ，１１ｂを含むバスバプレート１２の外面を覆うように板状の端子カバー１４が設けられている。また、バスバプレート１３の外側にも端子２１ａ，２１ｂを含むバスバプレート１３の外面を覆うように板状の端子カバー１５が設けられている。 A plate-like terminal cover 14 is provided outside the bus bar plate 12 so as to cover the outer surface of the bus bar plate 12 including the terminals 11a and 11b. A plate-like terminal cover 15 is also provided outside the bus bar plate 13 so as to cover the outer surface of the bus bar plate 13 including the terminals 21a and 21b.

なお、第１の電池集合体１０において、例えば、電池セル１１のプラス極が上側の端子１１ａで、マイナス極が下側の端子１１ｂである場合、隣り合う電池セル１１のマイナス極が上側の端子１１ａになり、プラス極が下側の端子１１ｂになるように、電池セル１１のプラス極およびマイナス極が交互に上下反転するようにして配置されている。 In the first battery assembly 10, for example, when the positive electrode of the battery cell 11 is the upper terminal 11a and the negative electrode is the lower terminal 11b, the negative electrode of the adjacent battery cell 11 is the upper terminal. 11a, and the positive electrode and the negative electrode of the battery cell 11 are alternately arranged upside down so that the positive electrode becomes the lower terminal 11b.

例えば、図１に示すように、第１の電池集合体１０（図２参照）において、電池セル１１（図４参照）の下側の端子１１ｂのマイナス極（−）と、隣り合う電池セル１１の下側の端子１１ｂのプラス極（＋）とがバスバ１７Ａ（１７）によって互いに接続され、バスバ１７Ａ（１７）が締結ナットＮ，Ｎを介して端子１１ｂ，１１ｂに固定されている。また、前記隣り合う電池セル１１の上側の端子１１ａのマイナス極（−）と、さらに隣り合う電池セル１１の上側の端子１１ａのプラス極（＋）とがバスバ１６Ａ（１６）によって互いに接続され、バスバ１６Ａ（１６）が締結ナットＮ，Ｎを介して端子１１ａ，１１ａに固定されている。このようにして、第１の電池集合体１０において、すべての電池セル１１が電気的に直列に接続されている。 For example, as shown in FIG. 1, in the first battery assembly 10 (see FIG. 2), the negative electrode (−) of the lower terminal 11 b of the battery cell 11 (see FIG. 4) and the adjacent battery cell 11. The positive pole (+) of the lower terminal 11b is connected to each other by a bus bar 17A (17), and the bus bar 17A (17) is fixed to the terminals 11b and 11b via fastening nuts N and N. Further, the negative electrode (−) of the upper terminal 11a of the adjacent battery cell 11 and the positive electrode (+) of the upper terminal 11a of the adjacent battery cell 11 are connected to each other by the bus bar 16A (16). A bus bar 16A (16) is fixed to the terminals 11a and 11a via fastening nuts N and N. In this way, in the first battery assembly 10, all the battery cells 11 are electrically connected in series.

また、第２の電池集合体２０についても、前記第１の電池集合体１０と同様にして、バスバ１６，１７（図４参照）によって、すべての電池セル２１が電気的に直列に接続されている。また、第１の電池集合体１０の一方の端部の電池セル１１と第２の電池集合体２０の一方の端部の電池セル２１は、図示しない接続部材（バスバ）によって電気的に直列に接続されている。また、第１の電池集合体１０の他方の端部の電池セル１１と第２の電池集合体２０の他方の端部の電池セル２１は、組電池１の外部に取り出されて、図示しない外部負荷（例えば、走行モータなど）と接続されるように構成されている。 Also, with respect to the second battery assembly 20, all the battery cells 21 are electrically connected in series by the bus bars 16 and 17 (see FIG. 4) in the same manner as the first battery assembly 10. Yes. The battery cell 11 at one end of the first battery assembly 10 and the battery cell 21 at one end of the second battery assembly 20 are electrically connected in series by a connection member (bus bar) (not shown). It is connected. In addition, the battery cell 11 at the other end of the first battery assembly 10 and the battery cell 21 at the other end of the second battery assembly 20 are taken out of the assembled battery 1 and externally not shown. It is comprised so that it may be connected with load (for example, traveling motor etc.).

また、第１の電池集合体１０（図２参照）の並び方向（車幅方向）の端部には、コ字状に折り曲げ形成された金属製のエンドプレート１８が、その凹面が外側を向くように配置され、第１の保持部材３０とボルトＢ１およびナットＮ１を介して連結され、第３の保持部材６０とボルトＢ１およびナット（不図示）を介して連結されている。また、第２の電池集合体２０の端部にも、同様な構成のエンドプレート１９が、ボルトＢ１およびナットＮ１を介して第２の保持部材４０と第４の保持部材７０に連結されている。 Further, a metal end plate 18 bent in a U-shape is formed at the end of the first battery assembly 10 (see FIG. 2) in the arrangement direction (vehicle width direction), and the concave surface thereof faces outward. The first holding member 30 is connected to the first holding member 30 via a bolt B1 and a nut N1, and is connected to the third holding member 60 via a bolt B1 and a nut (not shown). In addition, an end plate 19 having a similar configuration is also connected to the second holding member 40 and the fourth holding member 70 via bolts B1 and nuts N1 at the end of the second battery assembly 20. .

図５に示すように、第１の保持部材３０は、鉄やアルミなどの金属製の板材（第２の保持部材４０、第１の連結部材５０、第３の保持部材６０、第４の保持部材７０、第２の連結部材８０も同様）によって左右方向から側面視において略クランク状（階段状）に折り曲げ形成され、第１の電池集合体１０（図２参照）の底面に位置する左右方向に細長形状の板部３１と、板部３１の内縁部に対して鉛直方向（上下方向、重力方向）の上方に延びる板部３２と、板部３１の外縁部に対して鉛直方向の下方に延びる板部３３と、板部３３の下縁部に対して直交する外方に延びる板部３４とで構成されている。 As shown in FIG. 5, the first holding member 30 is made of a metal plate material such as iron or aluminum (second holding member 40, first connecting member 50, third holding member 60, fourth holding member. The member 70 and the second connecting member 80 are also bent in a substantially crank shape (stepped shape) in a side view from the left and right directions and are located on the bottom surface of the first battery assembly 10 (see FIG. 2). The elongated plate portion 31, the plate portion 32 extending upward in the vertical direction (vertical direction, gravity direction) with respect to the inner edge portion of the plate portion 31, and the lower portion in the vertical direction with respect to the outer edge portion of the plate portion 31. The plate portion 33 extends and the plate portion 34 extends outwardly orthogonal to the lower edge portion of the plate portion 33.

板部３１には、長手方向（左右方向）に沿って所定間隔毎に複数のスリット状の通風孔３１ａが形成されている。この通風孔３１ａは、板部３１の長手方向に直交する方向に細長く形成されている。 A plurality of slit-shaped ventilation holes 31 a are formed in the plate portion 31 at predetermined intervals along the longitudinal direction (left-right direction). The ventilation hole 31 a is formed to be elongated in a direction orthogonal to the longitudinal direction of the plate portion 31.

また、板部３１には、電池セル１１を第１の保持部材３０に保持させるためのボルトＢ５（図４参照）が挿入されるボルト挿入孔３１ｂが通風孔３１ａと通風孔３１ａとの間に形成されている。なお、ボルト挿入孔３１ｂは、通風孔３１ａ，３１ａ間においてひとつ置きごとに形成されている。 Further, the plate portion 31 has a bolt insertion hole 31b into which a bolt B5 (see FIG. 4) for holding the battery cell 11 on the first holding member 30 is inserted between the ventilation hole 31a and the ventilation hole 31a. Is formed. In addition, the bolt insertion hole 31b is formed every other space between the ventilation holes 31a and 31a.

また、板部３１の長手方向の両端部には、エンドプレート１８と連結するためのボルトＢ１（図１参照）が挿通されるボルト挿通孔３１ｃ，３１ｃが形成されている。 Further, bolt insertion holes 31 c and 31 c through which bolts B 1 (see FIG. 1) for connecting to the end plate 18 are inserted are formed at both ends in the longitudinal direction of the plate portion 31.

板部３２には、長手方向の両端部に、第２の保持部材４０と連結するためのボルト挿通孔３２ａ，３２ａが形成されている。 Bolt insertion holes 32 a and 32 a for connecting to the second holding member 40 are formed in the plate portion 32 at both ends in the longitudinal direction.

板部３３には、バスバプレート１２と連結する際のボルトＢ２（図４参照）が挿通されるボルト挿通孔３３ａが、長手方向に沿って所定間隔毎に形成されている。 The plate portion 33 is formed with bolt insertion holes 33a through which bolts B2 (see FIG. 4) for connection with the bus bar plate 12 are inserted at predetermined intervals along the longitudinal direction.

板部３４には、第１の連結部材５０と連結するためのボルトＢ３（図４参照）が挿通されるボルト挿通孔３４ａが、長手方向に沿って所定間隔毎に形成されている。 Bolt insertion holes 34a through which bolts B3 (see FIG. 4) for connecting to the first connecting member 50 are inserted are formed in the plate portion 34 at predetermined intervals along the longitudinal direction.

また、第２の保持部材４０は、第１の保持部材３０と同じ形状であり、第１の保持部材３０に対して面対称に配置されている。この第２の保持部材４０は、第２の電池集合体２０（図２参照）の底面に位置する板部４１と、板部４１の内縁部に対して鉛直方向（上下方向、重力方向）の上方に延びる板部４２と、板部４１の外縁部に対して鉛直方向の下方に延びる板部４３と、板部４３の下縁部に対して直交する外方に延びる板部４４とで構成されている。 Further, the second holding member 40 has the same shape as the first holding member 30 and is disposed symmetrically with respect to the first holding member 30. The second holding member 40 has a plate portion 41 positioned on the bottom surface of the second battery assembly 20 (see FIG. 2) and a vertical direction (vertical direction, gravity direction) with respect to the inner edge portion of the plate portion 41. A plate portion 42 that extends upward, a plate portion 43 that extends downward in the vertical direction with respect to the outer edge portion of the plate portion 41, and a plate portion 44 that extends outward perpendicular to the lower edge portion of the plate portion 43. Has been.

なお、第１の保持部材３０と同様にして、板部４１には、通風孔４１ａ、ボルト挿入孔４１ｂ、ボルト挿通孔４１ｃが形成され、板部４２には、ボルト挿通孔４２ａ，４２ａが形成され、板部４３には、ボルト挿通孔４３ａ（一方のみ図示）が形成され、板部４４には、ボルト挿通孔４４ａ（一部のみ図示）が形成されている。 In the same manner as the first holding member 30, the plate portion 41 is formed with ventilation holes 41 a, bolt insertion holes 41 b, and bolt insertion holes 41 c, and the plate portion 42 is formed with bolt insertion holes 42 a and 42 a. The plate portion 43 is formed with a bolt insertion hole 43a (only one is shown), and the plate portion 44 is formed with a bolt insertion hole 44a (only a part is shown).

第１の連結部材５０は、第１の保持部材３０及び第２の保持部材４０の下側に配置され、前記板部３１，４１と対向する板部５１と、板部５１の両端縁部において、鉛直方向の上方（上下方向、重力方向）に延びる板部５２，５２と、板部５２，５２の上縁部に対して直交する外方へ延びる板部５３，５４とで略蓋状（溝状）に構成されている。 The first connecting member 50 is disposed below the first holding member 30 and the second holding member 40, at the plate portion 51 facing the plate portions 31 and 41, and at both edge portions of the plate portion 51. The plate portions 52, 52 extending upward in the vertical direction (vertical direction, gravity direction) and the plate portions 53, 54 extending outwardly orthogonal to the upper edges of the plate portions 52, 52 are substantially lid-shaped ( Groove shape).

板部５１の外面には、凹状の溝部５１ａが長手方向（車幅方向）に沿って複数本平行に形成されている。この溝部５１ａは、強度を高めるものであり、本実施形態のように３本に限定されるものではなく、適宜変更することができる。また、板部５１と板部５２，５２とによって形成される凹面が、左右方向（長手方向）からの側面視において略コ字状（略凹状）に形成され、その凹面が上方を向くように形成されている。 On the outer surface of the plate portion 51, a plurality of concave groove portions 51a are formed in parallel along the longitudinal direction (vehicle width direction). The groove 51a increases strength, and is not limited to three as in the present embodiment, and can be changed as appropriate. Further, the concave surface formed by the plate portion 51 and the plate portions 52 and 52 is formed in a substantially U shape (substantially concave shape) in a side view from the left-right direction (longitudinal direction), and the concave surface faces upward. Is formed.

板部５３には、第１の保持部材３０と連結される際に用いられるボルトＢ３（図４参照）が挿通されるボルト挿通孔５３ａが長手方向（車幅方向）に沿って所定間隔毎に形成されている。 The plate portion 53 has bolt insertion holes 53a through which bolts B3 (see FIG. 4) used when connected to the first holding member 30 are inserted at predetermined intervals along the longitudinal direction (vehicle width direction). Is formed.

板部５４には、第２の保持部材４０と連結される際に用いられるボルトＢ４（図４参照）が挿通されるボルト挿通孔５４ａが長手方向（車幅方向）に沿って所定間隔毎に形成されている。 The plate portion 54 has bolt insertion holes 54a through which bolts B4 (see FIG. 4) used when connected to the second holding member 40 are inserted at predetermined intervals along the longitudinal direction (vehicle width direction). Is formed.

図６に示すように、第３の保持部材６０は、第１の保持部材３０に対して面対称に形成され、板部６１，６２，６３，６４によって略クランク状（階段状）に形成されている。また、第１の保持部材３０と同様にして、板部６１には、通風孔６１ａ、ボルト挿入孔６１ｂ、ボルト挿通孔６１ｃが形成され、板部６２には、ボルト挿通孔６２ａが形成され、板部６３には、ボルト挿通孔６３ａが形成され、板部６４には、ボルト挿通孔６４ａが形成されている。なお、ボルト挿入孔６１ｂは、電池セル１１の上部を固定するボルトＢ６が挿通されるものである。 As shown in FIG. 6, the third holding member 60 is formed in plane symmetry with respect to the first holding member 30, and is formed in a substantially crank shape (step shape) by the plate portions 61, 62, 63, 64. ing. Similarly to the first holding member 30, the plate portion 61 is formed with a ventilation hole 61a, a bolt insertion hole 61b, and a bolt insertion hole 61c, and the plate portion 62 is formed with a bolt insertion hole 62a. The plate portion 63 is formed with a bolt insertion hole 63a, and the plate portion 64 is formed with a bolt insertion hole 64a. The bolt insertion hole 61b is for inserting a bolt B6 for fixing the upper part of the battery cell 11.

第４の保持部材７０は、第３の保持部材６０と同じ形状であり、第２の保持部材４０に対して面対称に形成され、板部７１，７２，７３，７４によって略クランク状（階段状）に形成されている。また、第２の保持部材４０と同様にして、板部７１には、通風孔７１ａ、ボルト挿入孔７１ｂ、ボルト挿通孔７１ｃが形成され、板部７２には、ボルト挿通孔７２ａが形成され、板部７３には、ボルト挿通孔７３ａが形成され、板部７４には、ボルト挿通孔７４ａが形成されている。 The fourth holding member 70 has the same shape as the third holding member 60, is formed in plane symmetry with respect to the second holding member 40, and is substantially crank-shaped (stepped by the plate portions 71, 72, 73, 74. Formed). Similarly to the second holding member 40, the plate portion 71 is formed with a ventilation hole 71a, a bolt insertion hole 71b, and a bolt insertion hole 71c, and the plate portion 72 is formed with a bolt insertion hole 72a. A bolt insertion hole 73 a is formed in the plate portion 73, and a bolt insertion hole 74 a is formed in the plate portion 74.

第２の連結部材８０は、第１の連結部材５０に対して面対称に形成され、板部８１，８２，８２，８３，８４によって左右方向（長手方向）からの側面視において略コ字状（溝状）に形成され、凹面が下方を向くように形成されている。また、第１の連結部材５０と同様にして、板部８１には、複数の溝部８１ａが形成され、板部８３には、複数のボルト挿通孔８３ａが所定間隔毎に形成され、板部８４には、複数のボルト挿通孔８４ａが所定間隔毎に形成されている。 The second connecting member 80 is formed in plane symmetry with respect to the first connecting member 50, and is substantially U-shaped in a side view from the left-right direction (longitudinal direction) by the plate portions 81, 82, 82, 83, 84. It is formed in a (groove shape) so that the concave surface faces downward. Similarly to the first connecting member 50, a plurality of groove portions 81 a are formed in the plate portion 81, and a plurality of bolt insertion holes 83 a are formed in the plate portion 83 at predetermined intervals. A plurality of bolt insertion holes 84a are formed at predetermined intervals.

なお、本実施形態では、ボルト挿入孔６１ｂ，７１ｂが、通風孔６１ａ，６１ａ（７１ａ，７１ａ）間にひとつ置き毎に設けられ、かつ、前記ボルト挿入孔３１ｂ，４１ｂと対応しない位置に設けられている。また、本実施形態では、ボルト挿入孔３１ｂ，４１ｂとボルト挿入孔６１ｂ，７１ｂとをひとつ置き毎に形成したが、これに限定されるものではなく、すべての電池セル１１，２１に対応する位置にボルト挿入孔を形成してもよい。 In this embodiment, the bolt insertion holes 61b and 71b are provided every other space between the ventilation holes 61a and 61a (71a and 71a), and are provided at positions not corresponding to the bolt insertion holes 31b and 41b. ing. In the present embodiment, the bolt insertion holes 31b and 41b and the bolt insertion holes 61b and 71b are formed every other place, but the present invention is not limited to this, and positions corresponding to all the battery cells 11 and 21. Bolt insertion holes may be formed on the top.

このように構成された第１の保持部材３０、第２の保持部材４０、第１の連結部材５０、第３の保持部材６０、第４の保持部材７０、第２の連結部材８０において、第１の保持部材３０の板部３２と第２の保持部材４０の板部４２とが当接した状態において、ボルトＢ１（図２参照）をボルト挿通孔３２ａ，４２ａに挿通し、ナットＮ１（図２参照）に螺合させることで、第１の保持部材３０と第２の保持部材４０とを連結する。また、第３の保持部材６０の板部６２と第４の保持部材７０の板部７２とが当接した状態において、ボルトＢ１をボルト挿通孔３２ａ、４２ａに挿通し、ナットＮ１に螺合させることで、第３の保持部材６０と第４の保持部材７０とを連結する。 In the first holding member 30, the second holding member 40, the first connecting member 50, the third holding member 60, the fourth holding member 70, and the second connecting member 80 configured as described above, In a state where the plate portion 32 of the first holding member 30 and the plate portion 42 of the second holding member 40 are in contact with each other, the bolt B1 (see FIG. 2) is inserted into the bolt insertion holes 32a and 42a, and the nut N1 (see FIG. 2), the first holding member 30 and the second holding member 40 are connected. Further, in a state where the plate portion 62 of the third holding member 60 and the plate portion 72 of the fourth holding member 70 are in contact with each other, the bolt B1 is inserted into the bolt insertion holes 32a and 42a and screwed into the nut N1. Thus, the third holding member 60 and the fourth holding member 70 are connected.

また、図４に示すように、第１の保持部材３０の上面に図示しない絶縁部材を介して各電池セル１１を載置した状態において、ボルトＢ５をボルト挿入孔３１ｂに挿入して、電池セル１１の底面に形成された図示しない螺合部に螺合させることによって、各電池セル１１を第１の保持部材３０の上面に保持させる。また、第２の保持部材４０の上面側についても同様にして、第２の保持部材４０の上面に図示しない絶縁部材を介して各電池セル２１を載置した状態において、ボルトＢ５をボルト挿入孔４１ｂに挿入して、各電池セル２１を第２の保持部材４０の上面に保持させる。このとき、連結された第１の保持部材３０の板部３２と第２の保持部材４０の板部４２とがそれぞれ電池セル１１と電池セル２１との間に挿入された状態となる。 In addition, as shown in FIG. 4, in a state where each battery cell 11 is placed on the upper surface of the first holding member 30 via an insulating member (not shown), a bolt B5 is inserted into the bolt insertion hole 31b, and the battery cell is inserted. Each battery cell 11 is held on the upper surface of the first holding member 30 by being screwed into a screwing portion (not shown) formed on the bottom surface of the first holding member 30. Similarly, on the upper surface side of the second holding member 40, the bolt B5 is inserted into the bolt insertion hole in a state where each battery cell 21 is placed on the upper surface of the second holding member 40 via an insulating member (not shown). Each battery cell 21 is held on the upper surface of the second holding member 40 by being inserted into 41b. At this time, the plate part 32 of the connected first holding member 30 and the plate part 42 of the second holding member 40 are inserted between the battery cell 11 and the battery cell 21, respectively.

また、各電池セル１１の上面と各電池セル２１の上面に、図示しない絶縁部材を介して、連結された第３の保持部材６０および第４の保持部材７０を載置して、ボルトＢ６をボルト挿入孔６１ｂ（図６参照）に挿入して、電池セル２１の上面に形成された図示しない螺合部に螺合させることによって、各電池セル１１を第３の保持部材６０の下面に保持させる。また、ボルトＢ６をボルト挿入孔７１ｂ（図６参照）に挿入して、各電池セル２１を第４の保持部材７０の下面に保持させる。このとき、連結された第３の保持部材６０の板部２１と第４の保持部材７０の板部７２とがそれぞれ電池セル１１と電池セル２１との間に挿入された状態となる。 Moreover, the 3rd holding member 60 and the 4th holding member 70 which were connected via the insulating member which is not shown in figure on the upper surface of each battery cell 11 and each battery cell 21 are mounted, and volt | bolt B6 is attached. Each battery cell 11 is held on the lower surface of the third holding member 60 by being inserted into a bolt insertion hole 61b (see FIG. 6) and screwed into a screwing portion (not shown) formed on the upper surface of the battery cell 21. Let Further, the bolt B 6 is inserted into the bolt insertion hole 71 b (see FIG. 6), and each battery cell 21 is held on the lower surface of the fourth holding member 70. At this time, the plate part 21 of the connected third holding member 60 and the plate part 72 of the fourth holding member 70 are inserted between the battery cell 11 and the battery cell 21, respectively.

なお、各電池セル１１または各電池セル２１は、第１の保持部材３０および第３の保持部材６０の両端部に固定されるエンドプレート１８により、また第２の保持部材４０および第４の保持部材７０の両端部に固定されるエンドプレート１９により緊縛することにより、第１の保持部材３０、第２の保持部材４０、第３の保持部材６０および第４の保持部材７０に載置された状態で保持されていてもよい。このときは、各電池セル１１または各電池セル２１を保持するボルトＢ５，Ｂ６、ボルト挿入孔３１ｂ，４１ｂ，６１ｂ，７１ｂおよび電池セル１１，２１の底面と上面の螺合部（不図示）は不要となる。 Each battery cell 11 or each battery cell 21 is provided by the end plate 18 fixed to both ends of the first holding member 30 and the third holding member 60, and the second holding member 40 and the fourth holding member. The first holding member 30, the second holding member 40, the third holding member 60, and the fourth holding member 70 are mounted by being bound by the end plates 19 fixed to both ends of the member 70. It may be held in a state. At this time, the bolts B5 and B6 for holding each battery cell 11 or each battery cell 21, the bolt insertion holes 31b, 41b, 61b, 71b, and the screwed portions (not shown) of the bottom and top surfaces of the battery cells 11, 21 are It becomes unnecessary.

また、図７に示すように、第１の保持部材３０に形成された通風孔３１ａおよび第２の保持部材４０に形成された通風孔４１ａは、電池セル１１，２１間に配設されたセパレータＳＰ１，ＳＰ２と対応する位置に配置される。同時に、第３の保持部材６０に形成された通風孔６１ａおよび第４の保持部材７０に形成された通風孔７１ａは、電池セル１１，２１間に配設されたセパレータＳＰ１，ＳＰ２と対応する位置に配置される。すなわち、通風孔３１ａ，４１ａが、セパレータＳＰ１，ＳＰ２に形成された流路ｓ２の一端（下端）と連通し、通風孔６１ａ，７１ａが、セパレータＳＰ１，ＳＰ２に形成された流路ｓ２の他端（上端）と連通している。 In addition, as shown in FIG. 7, the ventilation holes 31 a formed in the first holding member 30 and the ventilation holes 41 a formed in the second holding member 40 are separators disposed between the battery cells 11 and 21. Arranged at positions corresponding to SP1 and SP2. At the same time, the ventilation holes 61a formed in the third holding member 60 and the ventilation holes 71a formed in the fourth holding member 70 are positions corresponding to the separators SP1 and SP2 disposed between the battery cells 11 and 21. Placed in. That is, the vent holes 31a and 41a communicate with one end (lower end) of the flow path s2 formed in the separators SP1 and SP2, and the vent holes 61a and 71a are the other end of the flow path s2 formed in the separators SP1 and SP2. It communicates with (top).

また、エンドプレート１８（図１および図２参照）を電池セル１１の並び方向（左右方向）の一端側から第１の保持部材３０と第３の保持部材６０との間において凹面が外側（左側）を向くように挿入して、ボルトＢ１およびナットＮ１（図１参照）を介して第１の保持部材３０と第３の保持部材６０とを連結する。なお、電池セル１１の並び方向（左右方向）の他端についても同様にして、エンドプレートを介して第１の保持部材３０と第３の保持部材６０とを連結する。 In addition, the end plate 18 (see FIGS. 1 and 2) has a concave surface on the outer side (left side) between the first holding member 30 and the third holding member 60 from one end side in the arrangement direction (left-right direction) of the battery cells 11. The first holding member 30 and the third holding member 60 are connected via the bolt B1 and the nut N1 (see FIG. 1). The first holding member 30 and the third holding member 60 are connected to each other in the same manner at the other end of the battery cells 11 in the arrangement direction (left-right direction).

また、エンドプレート１９（図１および図２参照）を電池セル２１の並び方向（左右方向）の一端側から第２の保持部材４０と第４の保持部材７０との間に凹面が外側（左側）を向くように挿入して、ボルトＢ１およびナットＮ１（図１参照）を介して第２の保持部材４０と第４の保持部材７０とを連結する。なお、電池セル２１の並び方向（左右方向）の他端についても同様にして、エンドプレートを介して第２の保持部材４０と第４の保持部材７０とを連結する。 In addition, the end plate 19 (see FIGS. 1 and 2) is provided with a concave surface on the outer side (left side) between the second holding member 40 and the fourth holding member 70 from one end side in the arrangement direction (left-right direction) of the battery cells 21. The second holding member 40 and the fourth holding member 70 are connected via the bolt B1 and the nut N1 (see FIG. 1). Similarly, the second holding member 40 and the fourth holding member 70 are connected to each other at the other end in the arrangement direction (left-right direction) of the battery cells 21 via the end plate.

また、ボルトＢ２（図４参照）をバスバプレート１２の下部および上部に形成された各ボルト挿入孔（不図示）、第１の保持部材３０のボルト挿通孔３３ａおよび第３の保持部材６０のボルト挿通孔６３ａに挿通して、ナットＮ２に螺合させることによって、バスバプレート１２の下部および上部を第１の保持部材３０および第３の保持部材６０に固定する。また、ボルトＢ２（図４参照）をバスバプレート１３の下部および上部に形成された各ボルト挿入孔（不図示）に挿通して、ナットＮ２に螺合させることによって、バスバプレート１３の下部および上部を第２の保持部材４０および第４の保持部材７０に固定する。 In addition, bolts B2 (see FIG. 4) are bolt insertion holes (not shown) formed in the lower and upper parts of the bus bar plate 12, bolt insertion holes 33a of the first holding member 30, and bolts of the third holding member 60. The lower and upper parts of the bus bar plate 12 are fixed to the first holding member 30 and the third holding member 60 by being inserted into the insertion hole 63a and screwed into the nut N2. Further, the bolt B2 (see FIG. 4) is inserted into each bolt insertion hole (not shown) formed in the lower and upper parts of the bus bar plate 13 and screwed into the nut N2, whereby the lower and upper parts of the bus bar plate 13 are engaged. Are fixed to the second holding member 40 and the fourth holding member 70.

また、第１の保持部材３０の板部３４と第１の連結部材５０の板部５３とを当接させた状態において、各ボルト挿通孔３４ａ，５３ａにボルトＢ３を挿通して、ナットＮ３に螺合させることで、第１の保持部材３０と第１の連結部材５０の一端側とを連結する。また、第２の保持部材４０の板部４４と第１の連結部材５０の板部５４とを当接させた状態において、各ボルト挿通孔４４ａ，５４ａにボルトＢ４を挿通して、ナットＮ４に螺合させることで、第２の保持部材４０と第１の連結部材５０の他端側とを連結する。 Further, in a state where the plate portion 34 of the first holding member 30 and the plate portion 53 of the first connecting member 50 are in contact with each other, the bolt B3 is inserted into each of the bolt insertion holes 34a and 53a, and the nut N3 is inserted. By screwing together, the first holding member 30 and the one end side of the first connecting member 50 are connected. Further, in a state where the plate portion 44 of the second holding member 40 and the plate portion 54 of the first connecting member 50 are in contact with each other, the bolt B4 is inserted into each of the bolt insertion holes 44a and 54a, and the nut N4 is inserted. By screwing together, the second holding member 40 and the other end side of the first connecting member 50 are connected.

また、第３の保持部材６０の板部６４と第２の連結部材８０の板部８３とを当接させた状態において、各ボルト挿通孔６４ａ，８３ａにボルトＢ３を挿通して、ナットＮ３に螺合させることで、第３の保持部材６０と第２の連結部材８０の一端側とを連結する。また、第４の保持部材７０の板部７４と第２の連結部材８０の板部８４とを当接させた状態において、各ボルト挿通孔７４ａ，８４ａにボルトＢ４を挿通して、ナットＮ４に螺合させることで、第４の保持部材７０と第２の連結部材８０の他端側とを連結する。 Further, in a state where the plate portion 64 of the third holding member 60 and the plate portion 83 of the second connecting member 80 are in contact with each other, the bolt B3 is inserted into each of the bolt insertion holes 64a and 83a, and the nut N3 is inserted. By screwing, the third holding member 60 and the one end side of the second connecting member 80 are connected. Further, in a state where the plate portion 74 of the fourth holding member 70 and the plate portion 84 of the second connecting member 80 are in contact with each other, the bolt B4 is inserted into each of the bolt insertion holes 74a and 84a, and the nut N4 is inserted. By screwing, the fourth holding member 70 and the other end side of the second connecting member 80 are connected.

このように、第１の保持部材３０と第２の保持部材４０と第１の連結部材５０とを組み合わせて連結することによって略四角形状の閉断面Ｑ１が形成される（図４参照）。また、第３の保持部材６０と第４の保持部材７０と第２の連結部材８０とを組み合わせて連結することによって略四角形状の閉断面Ｑ２が形成される（図４参照）。 As described above, the first holding member 30, the second holding member 40, and the first connecting member 50 are connected in combination to form a substantially rectangular closed cross section Q1 (see FIG. 4). Moreover, the substantially rectangular closed cross section Q2 is formed by connecting the third holding member 60, the fourth holding member 70, and the second connecting member 80 in combination (see FIG. 4).

また、閉断面Ｑ２によって形成された冷却風の通路の一端（左側）が、カバー部材２によって閉塞される（図１参照）。また、閉断面Ｑ１によって形成された冷却風の通路の他端（右側）が、カバー部材３によって閉塞される（図１参照）。 Further, one end (left side) of the cooling air passage formed by the closed cross section Q2 is closed by the cover member 2 (see FIG. 1). Further, the other end (right side) of the cooling air passage formed by the closed cross section Q1 is closed by the cover member 3 (see FIG. 1).

このように構成された組電池１は、図８に示すように、例えば、４ドアセダンのように前席（図示せず）と後席１００を備えた車両Ｖに搭載した場合、後席１００の背面に配置される。さらに詳述すると、複数のサブフレーム１０１を介して、車両Ｖの車体（リア側のフロアパネル）上に固定される。なお、本実施形態の組電池１は、ハイブリッド自動車、燃料電池自動車、電気自動車などの車両Ｖに適用することができる。また、本実施形態の組電池１は、四輪車に限定されるものではなく、二輪車であっておよく、あるいは車両に限定されるものではなく、船舶や航空機などに適用することもできる。 As shown in FIG. 8, the assembled battery 1 configured in this way is mounted on a vehicle V having a front seat (not shown) and a rear seat 100 such as a four-door sedan. Located on the back. More specifically, it is fixed on the vehicle body (rear side floor panel) of the vehicle V via a plurality of sub-frames 101. In addition, the assembled battery 1 of this embodiment is applicable to vehicles V, such as a hybrid vehicle, a fuel cell vehicle, and an electric vehicle. Moreover, the assembled battery 1 of this embodiment is not limited to a four-wheeled vehicle, may be a two-wheeled vehicle, or is not limited to a vehicle, and can also be applied to a ship, an aircraft, or the like.

また、閉断面Ｑ２によって形成された通路のカバー部材２とは反対側には、組電池１内に冷却風を取り込むための吸気ダクト１０２が接続されている。吸気ダクト１０２は、組電池１の上部から下部に向けて下降する流路からなる下降部１０２ａを有し、左右方向での後席１００の端部に形成された吸気口（図示せず）と連通するように構成されている。 An intake duct 102 for taking cooling air into the assembled battery 1 is connected to the side of the passage formed by the closed section Q2 opposite to the cover member 2. The intake duct 102 has a descending portion 102a composed of a flow path descending from the upper part to the lower part of the assembled battery 1, and an intake port (not shown) formed at the end of the rear seat 100 in the left-right direction. It is configured to communicate.

また、閉断面Ｑ１によって形成された通路のカバー部材３とは反対側には、組電池１を通過した冷却風が排出されるための排気ダクト１０３が接続されている。排気ダクト１０３は、その下流側の出口近傍に冷却ファン１０４を備えている。排気ダクト１０３の冷却ファン１０４の下流側は、車両Ｖの外部と連通している。 Further, an exhaust duct 103 for discharging the cooling air that has passed through the assembled battery 1 is connected to the side of the passage formed by the closed section Q1 opposite to the cover member 3. The exhaust duct 103 includes a cooling fan 104 in the vicinity of the outlet on the downstream side. A downstream side of the cooling fan 104 of the exhaust duct 103 communicates with the outside of the vehicle V.

次に、本実施形態の組電池１の冷却動作について説明する。すなわち、組電池１の電池セル１１，２１が図示しない温度センサの検出値に基づいて過昇温したと、図示しない制御部によって判断されると、制御部は冷却ファン１０４を駆動する。これにより、図９に示すように、吸気ダクト１０２の吸気口（図示せず）から車室内の空気が吸引され、吸気ダクト１０２を介して組電池１の閉断面Ｑ２からなるダクトに供給される。そして、各電池１１，２１を冷却した空気は、閉断面Ｑ１からなるダクトに排出され、排気ダクト１０３を介して車外に排出される。 Next, the cooling operation of the assembled battery 1 of this embodiment will be described. That is, when it is determined by a control unit (not shown) that the battery cells 11 and 21 of the assembled battery 1 have excessively heated based on the detection value of a temperature sensor (not shown), the control unit drives the cooling fan 104. As a result, as shown in FIG. 9, the air in the vehicle compartment is sucked from the intake port (not shown) of the intake duct 102 and supplied to the duct having the closed cross section Q 2 of the assembled battery 1 through the intake duct 102. . And the air which cooled each battery 11 and 21 is discharged | emitted by the duct which consists of the closed cross section Q1, and is discharged | emitted outside the vehicle via the exhaust duct 103. FIG.

なお、組電池１内に取り込まれた冷却風（空気）は、図７に示すように、閉断面Ｑ２からなる流路を通り、第３の保持部材６０の各通風孔６１ａおよび第４の保持部材７０の各通風孔７１ａから吸引される。そして、冷却風は、セパレータＳＰ１，ＳＰ２に形成された流路ｓ２を通ることによって、電池セル１１，２１を放熱させて、電池セル１１，２１の冷却が行われる。電池セル１１，２１から熱を奪った冷却風は、第１の保持部材３０の通風孔３１ａおよび第２の保持部材４０の通風孔４１ａを通って、閉断面Ｑ１からなる流路に排気される。 As shown in FIG. 7, the cooling air (air) taken into the assembled battery 1 passes through the flow path having the closed cross section Q2, and passes through the ventilation holes 61a of the third holding member 60 and the fourth holding air. The member 70 is sucked from each ventilation hole 71a. The cooling air passes through the flow path s2 formed in the separators SP1 and SP2, thereby radiating heat from the battery cells 11 and 21 and cooling the battery cells 11 and 21. The cooling air deprived of heat from the battery cells 11 and 21 is exhausted through the ventilation hole 31a of the first holding member 30 and the ventilation hole 41a of the second holding member 40 to the flow path having the closed cross section Q1. .

以上説明したように、本実施形態の組電池１では、第１の保持部材３０と第２の保持部材４０と第１の連結部材５０とを組み合わせて閉断面Ｑ１を形成することにより、第１の保持部材３０、第２の保持部材４０および第１の連結部材５０によって強度の高い部材が形成され、各電池セル１１，２１を従来よりも高い強度で保持することが可能になる。これにより、強度を増すために重い部材を用いる必要がなくなり、板状の部材を組み合わせるという簡単な構造で強度の高い電池保持構造を得ることができる。 As described above, in the assembled battery 1 according to the present embodiment, the first holding member 30, the second holding member 40, and the first connecting member 50 are combined to form the closed cross section Q1. The holding member 30, the second holding member 40, and the first connecting member 50 form a member having high strength, so that the battery cells 11 and 21 can be held with higher strength than before. Thereby, it is not necessary to use a heavy member to increase the strength, and a high-strength battery holding structure can be obtained with a simple structure in which plate-like members are combined.

また、本実施形態の組電池１では、電池セル１１，２１の底面に閉断面Ｑ１を形成し、上面に閉断面Ｑ２を形成して、電池セル１１，２１を上下で保持するので、組電池１の高さ寸法をより高くすることができる。つまり、電池セル１１，２１の高さ寸法を高くして電池セル１１，２１の重心を高く設計したとしても、電池セル１１，２１を安定して保持することが可能になる。 Moreover, in the assembled battery 1 of this embodiment, since the closed cross section Q1 is formed in the bottom face of the battery cells 11 and 21, and the closed cross section Q2 is formed in the top face, the battery cells 11 and 21 are held up and down. The height dimension of 1 can be made higher. That is, even if the height dimension of the battery cells 11 and 21 is increased to design the center of gravity of the battery cells 11 and 21 high, the battery cells 11 and 21 can be stably held.

また、本実施形態の組電池１では、閉断面Ｑ１，Ｑ２を冷却風（空気）の通路として利用できるので、冷却風の通路を別個に設ける必要がなく、部品点数の削減により、組電池１の製造工程の簡略化を図ることが可能になる。 Moreover, in the assembled battery 1 of this embodiment, since the closed cross sections Q1 and Q2 can be used as a passage for cooling air (air), it is not necessary to provide a passage for cooling air separately, and the assembled battery 1 can be reduced by reducing the number of parts. The manufacturing process can be simplified.

また、本実施形態の組電池１では、電池セル１１，２１間にセパレータＳＰ１，ＳＰ２を配置して、電池セル１１，２１間に隙間（流路ｓ２）を形成したとこにより、電池セル１１，１１間（電池セル２１，２１間）で空気が淀むことがなくなり、熱がこもるのを防止できる。 In the assembled battery 1 of the present embodiment, the separators SP1 and SP2 are arranged between the battery cells 11 and 21, and the gap (flow path s2) is formed between the battery cells 11 and 21, so The air does not stagnate between 11 (battery cells 21 and 21), and heat can be prevented from being accumulated.

また、本実施形態の組電池１では、排気ダクト１０３に冷却ファン１０４を設けた、つまり閉断面Ｑ１の下流側に冷却ファン１０４を設けたので、外気（空気）が電池セル１１，１１間および電池セル２１，２１間を介して強制的に導入（導入）されるので、冷却風（空気）の通流を向上できる。 Further, in the battery pack 1 of the present embodiment, the cooling fan 104 is provided in the exhaust duct 103, that is, the cooling fan 104 is provided on the downstream side of the closed cross section Q1, so that the outside air (air) flows between the battery cells 11 and 11 and Since it is forcibly introduced (introduced) between the battery cells 21 and 21, the flow of cooling air (air) can be improved.

なお、本実施形態では、第１の保持部材３０、第２の保持部材４０、第３の保持部材６０、第４の保持部材７０の形状を略階段状（略クランク状）とし、第１の連結部材５０および第２の連結部材８０を略蓋状（溝状）とした場合を例に挙げて説明したが、この形状に限定されるものではなく、閉断面が形成できる形状であれば、本実施形態の形状に限定されるものではない。例えば、図１０（ａ）に示すように、断面視クランク状の第１の保持部材３０Ａ、第２の保持部材４０Ａとし、断面視凹状の第１の連結部材５０Ａとして、閉断面Ｑ１を形成してもよい。なお、図１０（ａ）では、電池セル１１，２１の上側に設けられる閉断面Ｑ２の図示を省略している（図１０（ｂ）も同様）。 In the present embodiment, the shape of the first holding member 30, the second holding member 40, the third holding member 60, and the fourth holding member 70 is substantially stepped (substantially crank), and the first The case where the connecting member 50 and the second connecting member 80 are substantially lid-shaped (groove-shaped) has been described as an example. However, the shape is not limited to this shape. It is not limited to the shape of this embodiment. For example, as shown in FIG. 10 (a), a first holding member 30A and a second holding member 40A having a crank shape in cross section are formed, and a closed cross section Q1 is formed as a first connecting member 50A having a concave shape in cross section. May be. In FIG. 10A, illustration of the closed cross section Q2 provided on the upper side of the battery cells 11 and 21 is omitted (the same applies to FIG. 10B).

また、図１０（ｂ）に示すように、断面視略鉤状の第１の保持部材３０Ｂ、第２の保持部材４０Ｂとし、断面視略板状の第１の連結部材５０Ｂとして、閉断面Ｑ１を形成してもよい。 Further, as shown in FIG. 10B, the first holding member 30B and the second holding member 40B each having a substantially bowl shape in cross section, and the first connecting member 50B having a substantially plate shape in cross section have a closed cross section Q1. May be formed.

また、第１の保持部材３０、第２の保持部材４０、第３の保持部材６０、第４の保持部材７０において、板部３２，４２，６２，７２を設けずに断面Ｌ字状に形成したものでもよい。また、図１０（ａ）、（ｂ）に示す第３の保持部材６０Ａ，６０Ｂ、第４の保持部材７０Ａ，７０Ｂにおいても同様である。 In addition, the first holding member 30, the second holding member 40, the third holding member 60, and the fourth holding member 70 are formed in an L-shaped cross section without providing the plate portions 32, 42, 62, and 72. You may have done. The same applies to the third holding members 60A and 60B and the fourth holding members 70A and 70B shown in FIGS. 10 (a) and 10 (b).

また、本実施形態では、電池セル１１，２１間にセパレータＳＰ１，ＳＰ２を設けた場合を例に挙げて説明したが、これに限定されるものではなく、セパレータＳＰ１，ＳＰ２を設けずに電池セル１１，２１間に冷却風の通路としての隙間が形成されるように、電池セル１１を第１の保持部材３０と第３の保持部材６０とに保持させ、電池セル２１を第２の保持部材４０と第４の保持部材７０とに保持させる構成であってもよい。 Further, in the present embodiment, the case where the separators SP1 and SP2 are provided between the battery cells 11 and 21 has been described as an example. However, the present invention is not limited to this, and the battery cell is not provided with the separators SP1 and SP2. The battery cell 11 is held by the first holding member 30 and the third holding member 60 so that a gap as a passage of cooling air is formed between 11 and 21, and the battery cell 21 is held by the second holding member. 40 and the fourth holding member 70 may be used.

また、本実施形態では、電池セル１１，２１の底面側に閉断面Ｑ１を形成し、上面側に閉断面Ｑ２を形成した場合を例に挙げて説明したが、これに限定されるものではなく、閉断面Ｑ１のみを設ける構成であってもよい。 In the present embodiment, the case where the closed cross section Q1 is formed on the bottom surface side of the battery cells 11 and 21 and the closed cross section Q2 is formed on the top surface side is described as an example. However, the present invention is not limited to this. A configuration in which only the closed cross section Q1 is provided may be employed.

また、本実施形態では、閉断面Ｑ２から閉断面Ｑ１に冷却風が流れる構成を例に挙げて説明したが、逆に閉断面Ｑ２の下流側に冷却ファンを設け、閉断面Ｑ１から閉断面Ｑ２に冷却風が流れるようにしてもよい。 Further, in the present embodiment, the configuration in which the cooling air flows from the closed cross section Q2 to the closed cross section Q1 has been described as an example, but conversely, a cooling fan is provided on the downstream side of the closed cross section Q2, and the closed cross section Q1 is closed to the closed cross section Q2. Cooling air may flow through the air.

また、本実施形態では、各部材を結合する手段としてボルトなどを用いて締結する構成を例に挙げて説明したが、前記結合手段はこれに限定されるものではなく、溶接など他の手段を用いてもよい。 Further, in the present embodiment, the configuration in which the members are fastened using bolts or the like has been described as an example of means for joining the members. However, the joining means is not limited to this, and other means such as welding may be used. It may be used.

１組電池
１０第１の電池集合体
１１電池セル
２０第２の電池集合体
２１電池セル
３０第１の保持部材
３１ａ通風孔
４０第２の保持部材
４１ａ通風孔
５０第１の連結部材
６０第３の保持部材
６１ａ通風孔
７０第４の保持部材
７１ａ通風孔
８０第２の連結部材
１０４冷却ファン
Ｑ１，Ｑ２閉断面
ｓ２流路（隙間） DESCRIPTION OF SYMBOLS 1 assembled battery 10 1st battery assembly 11 battery cell 20 2nd battery assembly 21 battery cell 30 1st holding member 31a Ventilation hole 40 2nd holding member 41a Ventilation hole 50 1st connection member 60 3rd Holding member 61a Ventilation hole 70 Fourth holding member 71a Ventilation hole 80 Second connecting member 104 Cooling fans Q1, Q2 Closed cross section s2 Flow path (gap)

Claims

A first battery assembly comprising a plurality of battery cells;
A second battery assembly that is installed adjacent to the first battery assembly and includes a plurality of battery cells;
A first holding member for holding the bottom surface of the battery cell of the first battery assembly;
A second holding member for holding the bottom surface of the battery cell of the second battery assembly;
A first connecting member that connects the first holding member and the second holding member;
A battery pack having a closed cross section formed by combining the first holding member, the second holding member, and the first connecting member.

In the first battery assembly and the second battery assembly, each of the battery cells is provided with a gap, and the first holding member and the second holding member correspond to the gap. The assembled battery according to claim 1, wherein a ventilation hole is formed at a position where the battery is formed.

A third holding member for holding the upper surface of the battery cell of the first battery assembly;
A fourth holding member for holding the upper surface of the battery cell of the second battery assembly;
A second connecting member that connects the third holding member and the fourth holding member;
The assembled battery according to claim 1 or 2, wherein a closed cross section is formed by combining the third holding member, the fourth holding member, and the second connecting member.

A third holding member for holding the upper surface of the battery cell of the first battery assembly;
A fourth holding member for holding the upper surface of the battery cell of the second battery assembly;
A second connecting member that connects the third holding member and the fourth holding member;
A closed cross section is formed by combining the third holding member, the fourth holding member, and the second connecting member,
In the first battery assembly and the second battery assembly, each of the battery cells is provided with a gap, and the third holding member and the fourth holding member correspond to the gap. The assembled battery according to claim 2, wherein a ventilation hole is formed at a position where the ventilation hole is formed.

The assembled battery according to claim 4, wherein a cooling fan is provided downstream of any one of the closed cross sections.