JP2006066322A - Battery pack and module battery - Google Patents

Battery pack and module battery Download PDF

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JP2006066322A
JP2006066322A JP2004249938A JP2004249938A JP2006066322A JP 2006066322 A JP2006066322 A JP 2006066322A JP 2004249938 A JP2004249938 A JP 2004249938A JP 2004249938 A JP2004249938 A JP 2004249938A JP 2006066322 A JP2006066322 A JP 2006066322A
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cell
terminal
assembled battery
bent
flat
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JP4457812B2 (en
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Toshiaki Konuki
利明 小貫
Kensuke Goto
健介 後藤
Kotaro Ikeda
幸太郎 池田
Tsunemi Aiba
恒美 相羽
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Resonac Corp
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Shin Kobe Electric Machinery 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

<P>PROBLEM TO BE SOLVED: To provide a battery pack enhancing assembly property, reducing component cost, making small and light, and enhancing reliability. <P>SOLUTION: Two kinds of cells of a cell A and a cell B are used in the battery pack. These cells are constituted by sealing a plate-like electrode group in a laminate film, one surface of the laminate film is formed in a plain part having almost a plain and the other surface in a projecting surface part having projection, and positive and negative terminals are derived from the one side of the laminate film along the plain part. Tip parts of terminals of the cell A are individually bent on the plain part side and the projecting surface side, and the tip parts of both terminals of the cell B are bent on the projecting surface side. The cell A and the cell B are arranged so that the projecting surface parts are faced each other and are fixed to an intermediate frame 6. The terminals bent on the projecting surface side of the cell A and the the terminals bent on the projecting surface side of the cell B are piled up and connected. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は組電池及びモジュール電池に係り、特に、ラミネートフィルム内に平板状の極板群が封入されたセルを複数個組み合わせた組電池及び該組電池を複数個有するモジュール電池に関する。   The present invention relates to an assembled battery and a module battery, and more particularly, to an assembled battery obtained by combining a plurality of cells in which a flat plate group is enclosed in a laminate film, and a module battery having a plurality of the assembled batteries.

二次電池は、ノートパソコン、携帯電話等のポータブル機器用電源として民生用分野で広く普及している。近年では、高エネルギ密度を有するリチウムイオン二次電池が大電源用電池としても注目されている。一方、自動車産業界では、環境問題に対応すべく、排出ガスのない、動力源を完全に電池のみとした電気自動車や内燃機関エンジン及び電池の両方を動力源とするハイブリッド電気自動車の開発が本格化し、一部実用段階に到達している。また、電動アシスト自転車や電動スクータ等の電源への適用も盛んに進められている。このような移動体用電源の分野でも、高エネルギ密度、かつ、小型、軽量電池の研究が盛んである。   Secondary batteries are widely used in the consumer field as power sources for portable devices such as notebook computers and mobile phones. In recent years, a lithium ion secondary battery having a high energy density has attracted attention as a battery for a large power source. On the other hand, in the automobile industry, in order to deal with environmental problems, full-scale development of electric vehicles with no exhaust gas and a power source completely made of batteries and hybrid electric vehicles using both internal combustion engine and batteries as power sources is in full swing. And some have reached the practical stage. Application to power sources such as electric assist bicycles and electric scooters has also been actively promoted. In the field of such mobile power supplies, research on high energy density, small size, and light weight batteries is also active.

二次電池を用いた電源の小型・軽量化を達成するために、正極、負極の間にセパレータを介在してなる電極群と電解液とからなる発電要素を、金属層の両面を樹脂層で被覆した多層膜からなるラミネートフィルム（パックフィルム）に密封した二次電池が考案されている（例えば、特許文献１参照、以下、この種の電池をフィルム外装電池という。）。従って、フィルム外装電池を用いて組電池を構成したり、そのような複数個の組電池を有するモジュール電池により、小型・軽量かつ大電源の実現を図ることも考えられる。   In order to achieve a reduction in size and weight of a power source using a secondary battery, a power generation element composed of an electrode group having a separator between a positive electrode and a negative electrode and an electrolyte, and a metal layer on both sides of a resin layer A secondary battery sealed in a laminated film (pack film) made of a coated multilayer film has been devised (see, for example, Patent Document 1, hereinafter, this type of battery is referred to as a film-clad battery). Therefore, it is conceivable that a battery pack is used to form an assembled battery, or that a module battery having such a plurality of assembled batteries achieves a small, lightweight, and large power source.

特許第３３６３９１０号公報Japanese Patent No. 3363910

しかしながら、フィルム外装電池には種々の解決しようとする課題が存在する。すなわち、まず、多層膜で密封されたフィルム外装電池は、落下や衝撃に弱く、組立て時及び組電池の作製時に多くの注意が必要である。次に、フィルム外装電池は、極性を持った端子が同一辺から出力され、またその距離も近接するので短絡防止への課題も大きい。すなわち、多層膜と云う柔軟なラミネートフィルムで電極群及び両極端子が保持されるので、移動体に搭載された場合に移動時に発生する振動により、電極群、両極端子及びラミネートフィルムが各々振動してしまい、ラミネートフィルムの密封部や両極端子自身がこの振動で破壊される、という問題が生ずる。これに加え、通電電流値が大きくなる場合は端子部の断面積も大きくなり、端子自身の重量も増加するので、振動の影響はさらに大きな問題となる。   However, there are various problems to be solved in the film-clad battery. That is, first, a film-clad battery sealed with a multilayer film is vulnerable to dropping and impact, and requires great care when assembling and manufacturing an assembled battery. Next, since the film-coated battery has polar terminals that are output from the same side and the distance between them is close, the problem of preventing a short circuit is also great. That is, since the electrode group and the bipolar terminal are held by a flexible laminate film called a multilayer film, the electrode group, the bipolar terminal, and the laminate film vibrate due to vibrations that occur during movement when mounted on a moving body. Therefore, there arises a problem that the sealing portion of the laminate film and the bipolar terminals themselves are destroyed by this vibration. In addition, when the energization current value is increased, the cross-sectional area of the terminal portion is increased and the weight of the terminal itself is increased, so that the influence of vibration becomes a more serious problem.

一方、単電池を同一方向に重ね合わせ場合に電気的接続を直列接続する際には、ブスバ等の導通部材が必要となり部品点数が増加、及びこれに伴う作業工数の増加が問題となっている。また、異極性同士が相対するように単電池を交互に反転させながら重ね合わせると、平面部同士、突出面部同士が相対し、接続しなければならない異極端子間の距離が異なる、という問題が生ずる。更に、ブスバ等の導通部材を接続する際に発生する力や、振動の影響を受けて密封部の破壊、端子の破断等の問題が発生する。   On the other hand, when connecting cells in series in the same direction, when connecting electrical connections in series, a conductive member such as a bus bar is required, which increases the number of parts and the associated increase in work man-hours. . In addition, when the cells are overlapped while alternately reversing so that the opposite polarities are opposed to each other, there is a problem in that the distance between the different polarity terminals to be connected is different between the flat surface portions and the protruding surface portions. Arise. Furthermore, problems such as breakage of the sealing portion and breakage of the terminal occur due to the force generated when connecting the conductive member such as the bus bar and the influence of vibration.

そして、フィルム外装電池の扁平面を積層面とした場合には、冷却風を通過させる空間が存在しないため、電池の側面部のみを冷却することとなり、セル全体の冷却性能が低下する、という問題がある。   And, when the flat surface of the film-clad battery is a laminated surface, there is no space for the cooling air to pass, so only the side surface of the battery is cooled, and the cooling performance of the entire cell is lowered. There is.

本発明は上記事案に鑑み、組立性の向上、部品コストの低減化、小形軽量化を図り、信頼性の高い組電池及び該組電池を複数個有するモジュール電池を提供することを課題とする。   An object of the present invention is to provide an assembled battery with high reliability and a module battery having a plurality of the assembled batteries, improving assemblability, reducing component costs, and reducing the size and weight.

上記課題を解決するために、本発明の第１の態様は、ラミネートフィルム内に平板状の極板群が封入されたセルを複数個組み合わせた組電池であって、前記セルは前記ラミネートフィルムの一方の面が略平面の平面部と他方の面が突出した突出面部とを有し、正極端子及び負極端子が前記平面部に沿って前記ラミネートフィルムの一辺から外部に導出されており、各端子の先端部が前記平面部側と突出面部側とにそれぞれ屈曲されたセルＡと、両端子の先端部が前記突出面部側に屈曲されたセルＢとの２種からなり、前記セルＡとセルＢとは、前記突出面部同士が対向するように配置され、電気絶縁性材料からなる共通の枠体に固定されており、前記セルＡの前記突出面部側に屈曲された端子と前記セルＢの前記突出面部側に屈曲された端子とが重ね合わされ接続されていることを特徴する。   In order to solve the above problems, a first aspect of the present invention is an assembled battery in which a plurality of cells in which a plate-shaped electrode plate group is enclosed in a laminate film, wherein the cells are formed of the laminate film. One surface has a substantially flat plane portion and a protruding surface portion that the other surface protrudes, and a positive electrode terminal and a negative electrode terminal are led out from one side of the laminate film along the plane portion, and each terminal The cell A and the cell are composed of two types: a cell A in which the leading end of each terminal is bent toward the flat surface side and the projecting surface side, and a cell B in which the leading ends of both terminals are bent toward the projecting surface portion. B is arranged so that the projecting surface portions face each other, is fixed to a common frame made of an electrically insulating material, and a terminal bent to the projecting surface portion side of the cell A and the cell B Terminal bent to the protruding surface portion side Features that have been superimposed connection.

第１の態様の組電池では、セルＡとセルＢとの２種のセルが用いられている。これらのセルは、ラミネートフィルム内に平板状の極板群が封入されており、ラミネートフィルムの一方の面が略平面の平面部と他方の面が突出した突出面部とを有し、正負極端子が平面部に沿ってラミネートフィルムの一辺から外部に導出されている点で共通するが、セルＡの各端子の先端部は平面部側と突出面部側とにそれぞれ屈曲されており、セルＢの両端子の先端部は突出面部側に屈曲されている。セルＡとセルＢとは、突出面部同士が対向するように配置されており、電気絶縁性材料からなる共通の枠体に固定されている。そして、セルＡの突出面部側に屈曲された端子とセルＢの突出面部側に屈曲された端子とが重ね合わされ接続されている。本発明によれば、各端子の先端部が平面部側と突出面部側とに屈曲されたセルＡと、両端子の先端部が突出面部側に屈曲されたセルＢとの２種のセルを用いることにより、セルＡとセルＢとを突出面部同士が対向するように積層すると、異極端子同士の先端部が重ね合わされて簡単に接続できるため、組立性が向上し、ブスバ等の導通部品を新たに必要としないため、低コスト化及び小型化を実現できると共に、これらのセルが枠体に固定されているので、柔軟なラミネートフィルムに密閉されたセルの耐振性及び外力に対する耐衝撃性を高めることができる。   In the assembled battery of the first aspect, two types of cells, cell A and cell B, are used. In these cells, a flat plate group is enclosed in a laminate film, one surface of the laminate film has a substantially flat plane portion and a projecting surface portion on which the other surface protrudes, and a positive and negative electrode terminal Is common in that it is led out from one side of the laminate film along the plane part, but the tip of each terminal of the cell A is bent to the plane part side and the protruding surface part side, respectively. The tips of both terminals are bent toward the protruding surface. The cell A and the cell B are arranged so that the protruding surface portions face each other, and are fixed to a common frame made of an electrically insulating material. The terminals bent toward the protruding surface portion of the cell A and the terminals bent toward the protruding surface portion of the cell B are overlapped and connected. According to the present invention, there are two types of cells: a cell A in which the tip of each terminal is bent on the flat surface side and the protruding surface portion side, and a cell B in which the tip of both terminals are bent on the protruding surface portion side. By using the cell A and the cell B so that the protruding surface portions face each other, the tips of the different polarity terminals can be overlapped and easily connected, so that the assemblability is improved and the conductive parts such as bus bars are used. Since the cell is fixed to the frame body, the vibration resistance of the cell sealed in the flexible laminate film and the impact resistance against external force can be achieved. Can be increased.

第１の態様において、セルＡとセルＢとの突出面部同士が接着固定されているようにすれば、より耐振性を高め小型化を図ることができる。また、セルＡの平面部とセルＢの平面部とが枠体に支持された平板で覆われていれば、平面部側の耐衝撃性を更に高めることができ、平板が枠体に支持されているため、セルの耐振性を更に高めることができると共に、外力を受けても端子が個別に振動することが無いので、ラミネートフィルムにおける端子部の破損及びその周囲部の密閉性も維持できるため組電池の信頼性を確保することができる。このような態様では、平板の幅は枠体の幅より大きく、枠体の外側で平板間を固定する平板間固定部材により枠体に固定されているようにしてもよい。更に、平板に通風用の開口部が形成されていると共に、少なくとも側面側に通風用の溝が形成されていれば、開口部に冷却風を流通させることで、効率的にセルを冷却でき、セル環境温度を一定に保つことが可能となり、セル性能のバラツキを小さくできる。また、枠体の周面に通風用の開口部が形成されていれば、組電池周囲も冷却ができるため、セル性能のバラツキをさらに小さくできる。   In the first aspect, if the protruding surface portions of the cell A and the cell B are bonded and fixed to each other, the vibration resistance can be further improved and the size can be reduced. Moreover, if the flat part of the cell A and the flat part of the cell B are covered with a flat plate supported by the frame, the impact resistance on the flat part side can be further increased, and the flat plate is supported by the frame. As a result, the vibration resistance of the cell can be further increased, and even if an external force is applied, the terminals do not vibrate individually, so that damage to the terminal portions of the laminate film and the sealing of the surrounding portions can be maintained. The reliability of the assembled battery can be ensured. In such an aspect, the width of the flat plate may be larger than the width of the frame body, and the flat plate may be fixed to the frame body by an inter-plate fixing member that fixes the space between the flat plates outside the frame body. Furthermore, if an opening for ventilation is formed in the flat plate and a groove for ventilation is formed at least on the side surface side, the cell can be efficiently cooled by circulating cooling air through the opening, The cell environment temperature can be kept constant, and the variation in cell performance can be reduced. Moreover, if the opening for ventilation is formed in the surrounding surface of a frame, since the assembled battery periphery can also be cooled, the dispersion | variation in cell performance can be made still smaller.

また、組電池を構成するセルが、例えば、リチウム二次電池のように電圧監視が必要なタイプのセルの場合には、電圧検出線の接続作業の向上を図るため、枠体の上面にセルＡ及びセルＢの電圧検出用コネクタが配置されていることが好ましい。更に、端子間の接続作業の効率化を図るためには、枠体の上面にセルＡ及びセルＢの端子の接続固定部が設けられていることが望ましい。このとき、端子間の外部短絡を防止するために、セルＡの突出面部側に屈曲された端子に相対するように平板に突出部が形成されており、セルＡの平面部側に屈曲された端子に相対するよう枠体に突出部が形成されていることが好ましい。また、端子を覆い、かつ、電圧検出用コネクタの部分が開口した電気絶縁性カバーを更に備えようにすれば、電圧検出用コネクタによる接続を確保することができると共に、接続された端子部や電圧検出線を保護、絶縁できるため、安全性を向上させた組電池を提供することができる。更に、セルＡとセルＢとを配置した枠体は複数であり、これら複数の枠体がセルＢの平面部側とセルＡの平面部側とが対向するように隣接固定され、セルＡの平面部側に屈曲された端子とセルＢの突出面部側に屈曲された端子とが重ね合わされ接続すれば、組電池を構成するセル数を２以上の任意の数個とすることができるため、要望されたセル数に応じて組電池を構成することができる。   In addition, when the cell constituting the assembled battery is a type of cell that requires voltage monitoring, such as a lithium secondary battery, for example, the cell is formed on the upper surface of the frame body in order to improve the connection work of the voltage detection line. It is preferable that the voltage detection connectors for A and B are arranged. Furthermore, in order to increase the efficiency of the connection work between the terminals, it is desirable to provide connection fixing portions for the terminals of the cells A and B on the upper surface of the frame. At this time, in order to prevent an external short circuit between the terminals, the protruding portion is formed on the flat plate so as to be opposed to the terminal bent on the protruding surface portion side of the cell A, and is bent on the flat portion side of the cell A. It is preferable that a protrusion is formed on the frame so as to face the terminal. In addition, if an electric insulating cover that covers the terminal and the voltage detecting connector part is further provided is provided, the connection by the voltage detecting connector can be secured, and the connected terminal portion and voltage can be secured. Since the detection line can be protected and insulated, an assembled battery with improved safety can be provided. Furthermore, there are a plurality of frames in which the cells A and B are arranged, and the plurality of frames are adjacently fixed so that the plane portion side of the cell B and the plane portion side of the cell A face each other. If the terminals bent to the plane portion side and the terminals bent to the protruding surface portion side of the cell B are overlapped and connected, the number of cells constituting the assembled battery can be any number of two or more, The assembled battery can be configured according to the desired number of cells.

また、上記課題を解決するために、本発明の第２の態様は、第１の態様の組電池を複数個有するモジュール電池であって、前記複数個の組電池を載置するための基台と、前記複数個の組電池を前記基台に固定する組電池固定部材とを備えたことを特徴とする。   In order to solve the above problems, a second aspect of the present invention is a module battery having a plurality of assembled batteries according to the first aspect, and a base for mounting the plurality of assembled batteries. And an assembled battery fixing member for fixing the plurality of assembled batteries to the base.

第２の態様のモジュール電池では、第１の態様の複数個の組電池が組電池固定部材により基台に固定されているので、耐振動、耐衝撃性が更に向上し、複数個の組電池を基台に一括して固定できるため、固定作業も簡便になるため生産コストの低減も可能となると共に、複数個の組電池により大電力電源を提供することができる。   In the module battery of the second aspect, since the plurality of assembled batteries of the first aspect are fixed to the base by the assembled battery fixing member, vibration resistance and impact resistance are further improved, and the plurality of assembled batteries Can be fixed to the base in a lump, so that the fixing work can be simplified, so that the production cost can be reduced and a large power supply can be provided by a plurality of assembled batteries.

本発明の第１の態様によれば、各端子の先端部が平面部側と突出面部側とに屈曲されたセルＡと、両端子の先端部が突出面部側に屈曲されたセルＢとの２種のセルを用いることにより、セルＡとセルＢとを突出面部同士が対向するように積層すると、異極端子同士の先端部が重ね合わされて簡単に接続できるため、組立性が向上し、ブスバ等の導通部品を新たに必要としないため、低コスト化及び小型化を実現できると共に、これらのセルが枠体に固定されているので、柔軟なラミネートフィルムに密閉されたセルの耐振性及び外力に対する耐衝撃性を高めることができる、という効果を得ることができる。   According to the first aspect of the present invention, the cell A in which the distal end portion of each terminal is bent toward the flat portion side and the projecting surface portion side, and the cell B in which the distal end portions of both terminals are bent toward the projecting surface portion side. By using two types of cells, the cell A and the cell B are stacked so that the protruding surface portions face each other, and the tip portions of the different polarity terminals can be overlapped and easily connected. Since no new conductive parts such as bus bars are required, the cost and size can be reduced, and since these cells are fixed to the frame, the vibration resistance of the cells sealed in a flexible laminate film and The effect that the impact resistance with respect to an external force can be improved can be acquired.

また、本発明の第２の態様によれば、第１の態様の複数個の組電池が組電池固定部材により基台に固定されているので、耐振動、耐衝撃性が更に向上し、複数個の組電池を基台に一括して固定できるため、固定作業も簡便になるため生産コストの低減も可能となると共に、複数個の組電池により大電力電源を提供することができる、という効果を得ることができる。   Further, according to the second aspect of the present invention, since the plurality of assembled batteries of the first aspect are fixed to the base by the assembled battery fixing member, the vibration resistance and the shock resistance are further improved. Since the individual assembled batteries can be fixed together on the base, the fixing work is also simplified, so that the production cost can be reduced and a large power supply can be provided by a plurality of assembled batteries. Can be obtained.

以下、図面を参照して、本発明を車載用のモジュール電池に適用した実施の形態について説明する。   Hereinafter, an embodiment in which the present invention is applied to an in-vehicle module battery will be described with reference to the drawings.

（構成）
図１及び図２に示すように、本実施形態のモジュール電池２６は、１２個の組電池２４を有している。組電池２４は、基台２５上に一列に配設されており、組電池固定部材としての固定ボルト２８を基台２５の平面部に形成されたネジ穴にネジ締結することで、基台２５に一括して固定されている。 (Constitution)
As shown in FIGS. 1 and 2, the module battery 26 of the present embodiment has twelve assembled batteries 24. The assembled batteries 24 are arranged in a row on the base 25, and the base 25 is fixed by screwing a fixing bolt 28 as an assembled battery fixing member into a screw hole formed in a flat portion of the base 25. Are fixed together.

モジュール電池２４の上部には、樹脂材からなる板状で組電池２４の端子面を覆い絶縁保護する絶縁カバー２７が配置されている。絶縁カバー２７には、後述するコネクタ付電圧検出線２９のコネクタに対応する箇所に開口が形成されていると共に、長手方向に沿う両側に所定間隔で後述する絶縁カバー固定穴（図３、図６の符号９参照）との間で不図示のネジにより組電池２４にネジ固定するためのネジ穴が形成されている。   An insulating cover 27 that covers and protects the terminal surfaces of the assembled battery 24 in a plate shape made of a resin material is disposed on the module battery 24. An opening is formed in the insulating cover 27 at a position corresponding to a connector of the voltage detection line 29 with a connector described later, and an insulating cover fixing hole (described later) at predetermined intervals on both sides along the longitudinal direction. And a screw hole for fixing to the assembled battery 24 with a screw (not shown).

図３及び図４に示すように、組電池２４は、セルＡ１及びセルＢ２の２種類のセル（単電池）が各２個ずつ、合計４個のセルを有している。図５に示すように、これらのセルは、ラミネートフィルム内に複数枚の平板状正負極板がセパレータを介して積層されたリチウムイオン二次電池等の二次電池であり、ラミネートフィルムの一方の面が略平面の平面部５と、平面部５に対向する他方の面が突出した突出面部４とを有している。なお、これらのセルの周囲４面（突出面部４及び平面部５以外の２面）は突出面部４側に傾斜した傾斜面を形成している。   As shown in FIGS. 3 and 4, the assembled battery 24 has a total of four cells, two of each of two types of cells (unit cells), a cell A1 and a cell B2. As shown in FIG. 5, these cells are secondary batteries such as a lithium ion secondary battery in which a plurality of flat positive and negative plates are laminated via a separator in a laminate film, and one of the laminate films The plane portion 5 has a substantially flat surface and the projecting surface portion 4 from which the other surface facing the plane portion 5 projects. In addition, four surfaces (two surfaces other than the projecting surface portion 4 and the flat surface portion 5) around these cells form an inclined surface inclined toward the projecting surface portion 4 side.

各セルの正、負極端子の形状は薄板状（帯状）を呈しており、平面部５に沿ってラミネートフィルムの同一辺からラミネートフィルム外に導出されている。ラミネートフィルムの端子導出箇所は端子に加わる振動等がセル内部にそのまま伝達されないように補強されている。セルＡの正極端子１−１の先端部は突出面部４側に略直角に屈曲されており、負極端子１−２の先端部は反対側（平面部５側）に略直角に屈曲されている。一方、セルＢの正極端子２−１、負極端子２−２の先端部は、共に突出面部４側に略直角に屈曲されている。各端子の先端部には円形の穴３が形成されている。   The shape of the positive and negative electrode terminals of each cell is a thin plate (strip shape), and is led out of the laminate film from the same side of the laminate film along the flat portion 5. The terminal lead-out portion of the laminate film is reinforced so that vibration applied to the terminal is not transmitted as it is inside the cell. The tip of the positive terminal 1-1 of the cell A is bent at a substantially right angle to the protruding surface 4 side, and the tip of the negative terminal 1-2 is bent at a substantially right angle to the opposite side (plane part 5 side). . On the other hand, the tip portions of the positive electrode terminal 2-1 and the negative electrode terminal 2-2 of the cell B are both bent at a substantially right angle toward the protruding surface portion 4 side. A circular hole 3 is formed at the tip of each terminal.

図４に示すように、組電池２４は、樹脂材からなる電気絶縁性の平板としての端枠１７、セルＡ１及びセルＢ２を固定するための共通の枠体となり樹脂材からなる電気絶縁性の中間枠６、及び、セルＢ２とセルＡ１の相対する平面部５の間に配置され樹脂材からなる電気絶縁性の平板としての中間板１３を有している。   As shown in FIG. 4, the assembled battery 24 serves as a common frame for fixing the end frame 17, the cell A1 and the cell B2 as an electrically insulating flat plate made of a resin material, and an electrically insulating material made of a resin material. The intermediate frame 6 and an intermediate plate 13 as an electrically insulating flat plate made of a resin material are disposed between the opposing flat portions 5 of the cell B2 and the cell A1.

図６に示すように、中間枠６の底面を除く３周面には通風用の開口部７が形成されており、上面部には、端子の先端部を接続固定するための接続ナット保持穴８が形成されている（図３も参照）。この接続ナット保持穴８には、接続ナット２２（図４参照）がインサート成形されている。また、上面部には、上述した絶縁カバー２７をネジ固定するための絶縁カバー固定穴９も形成されている。   As shown in FIG. 6, ventilation openings 7 are formed on the three peripheral surfaces excluding the bottom surface of the intermediate frame 6, and a connection nut holding hole for connecting and fixing the tip of the terminal is formed on the top surface portion. 8 is formed (see also FIG. 3). A connection nut 22 (see FIG. 4) is insert-molded in the connection nut holding hole 8. In addition, an insulating cover fixing hole 9 for fixing the above-described insulating cover 27 with screws is also formed on the upper surface portion.

中間枠６の上部両端には、中間板１３ともう一方の中間枠６との位置決め・固定のための固定ガイド凸１０及び固定ガイド凹１１が形成されている。また、一方の端子と相対する箇所には、端子間の外部短絡を防止するために、上方に突出した突出部としてのセル間端子絶縁壁１２が形成されている（図３も参照）。中間枠６の内側上下には、セルの傾斜面に対応する傾斜面が形成されており、モジュール電池２６が車載用であることを考慮し、セルＡ、セルＢの突出面部４同士が対向するように中間枠６内に収容されたときに、縦方向での遊びを小さくしている。   A fixed guide protrusion 10 and a fixed guide recess 11 for positioning and fixing the intermediate plate 13 and the other intermediate frame 6 are formed at both upper ends of the intermediate frame 6. Further, in order to prevent an external short circuit between the terminals, an inter-cell terminal insulating wall 12 as a protruding portion protruding upward is formed at a location facing one terminal (see also FIG. 3). An inclined surface corresponding to the inclined surface of the cell is formed on the upper and lower sides of the intermediate frame 6, and the projecting surface portions 4 of the cells A and B are opposed to each other in consideration that the module battery 26 is for vehicle use. Thus, when accommodated in the intermediate frame 6, play in the vertical direction is reduced.

図７に示すように、中間板１３には相対するセルＡ１及びセルＢ２の平面部５間を冷却する冷却風の流通通路となる冷却穴１６が形成されており、中間板１３の両側面側には冷却穴１６への冷却風の供給を可能とする溝状の冷却通路１５が形成されている。また、中間板１３の両面には、セルＡ１及びセルＢ２の平面部を中間板１３に接着・固定する接着剤を塗布するための接着溝１４が形成されている。また、一方の端子と相対する箇所には、端子間の外部短絡を防止するために、上方に突出した突出部としてのセル間端子絶縁壁１２が形成されている（図３も参照）。なお、中間板１３のセル間端子絶縁壁１２は、中間枠６のセル間端子絶縁壁１２とは互いに他方の端子に相対している。換言すれば、中間板１３のセル間端子絶縁壁１２はセルＡ１の突出面部４側に屈曲された正極端子１−１に相対するように形成されており、中間枠６のセル間端子絶縁壁１２はセルＡ１の平面部５側に屈曲された負極端子１−２に相対するように形成されている。更に、中間板１３の上部両端には、中間枠６の上述した固定ガイド凸１０が挿入され位置決め・固定するための固定ガイド凹１１が形成されている。   As shown in FIG. 7, the intermediate plate 13 is formed with cooling holes 16 serving as cooling air flow passages for cooling between the flat portions 5 of the opposing cells A <b> 1 and B <b> 2. A groove-like cooling passage 15 is formed in the cooling hole 16 so that cooling air can be supplied to the cooling hole 16. Further, on both surfaces of the intermediate plate 13, adhesive grooves 14 for applying an adhesive that adheres and fixes the flat portions of the cells A <b> 1 and B <b> 2 to the intermediate plate 13 are formed. Further, in order to prevent an external short circuit between the terminals, an inter-cell terminal insulating wall 12 as a protruding portion protruding upward is formed at a location facing one terminal (see also FIG. 3). The inter-cell terminal insulating wall 12 of the intermediate plate 13 is opposed to the other terminal of the inter-cell terminal insulating wall 12 of the intermediate frame 6. In other words, the inter-cell terminal insulating wall 12 of the intermediate plate 13 is formed so as to be opposed to the positive electrode terminal 1-1 bent toward the protruding surface portion 4 side of the cell A1, and the inter-cell terminal insulating wall of the intermediate frame 6 is formed. 12 is formed so as to be opposed to the negative electrode terminal 1-2 bent toward the flat portion 5 side of the cell A1. Further, fixed guide recesses 11 are formed at both upper ends of the intermediate plate 13 for positioning and fixing the above-described fixed guide protrusions 10 of the intermediate frame 6.

図８に示すように、端枠１７は、セルＡ１又はセルＢ２の平面部５と相対しセルＡ又はセルＢが接着・固定されるセル接着面側に接着溝１４が形成されている。セル接着面側の上部両端の一方には固定ガイド凸１０、もう一方には固定ガイド凹１１が形成されており、後述する組電池固定部材１９と平板間固定部材２０とを接続固定するためのネジ穴１８が形成されている。この反対面となる外面にはセル平面部５の冷却風の流通経路となる冷却穴１６が形成されており、外面の両側側面には冷却風の入り口となる溝部としての冷却通路１５が形成されている。また、端枠１７は、固定部材１９、２０を配設するために、中間枠６の幅より大きな幅を有している。   As shown in FIG. 8, the end frame 17 has a bonding groove 14 formed on the cell bonding surface side where the cell A or the cell B is bonded and fixed facing the flat portion 5 of the cell A1 or the cell B2. A fixed guide protrusion 10 is formed on one of the upper ends of the cell bonding surface side, and a fixed guide recess 11 is formed on the other, and is used for connecting and fixing an assembled battery fixing member 19 and an inter-plate fixing member 20 described later. A screw hole 18 is formed. On the opposite outer surface, cooling holes 16 are formed that serve as a cooling air flow path of the cell plane portion 5, and cooling passages 15 are formed on both side surfaces of the outer surface as grooves serving as cooling air inlets. ing. The end frame 17 has a width larger than the width of the intermediate frame 6 in order to dispose the fixing members 19 and 20.

図４に示すように、組電池２４は、上述した組電池構成部材が、端枠１７、セルＡ１、中間枠６、セルＢ２、中間板１３、セルＡ１、中間枠６、セルＢ２、端枠１７の順に積層されている。セルＡ１及びセルＢ２の突出面部４同士は中間枠６内で対向するように配置されており、突出面部４同士が接着されている。外側に配置されたセルＡ１及びセルＢ２の平面部５はそれぞれ端枠１７のセル接着面に接着固定されており、内側に配置されたセルＡ１及びセルＢ２の平面部５は中間板１３に接着固定されている。   As shown in FIG. 4, the assembled battery constituting member described above includes the end frame 17, the cell A 1, the intermediate frame 6, the cell B 2, the intermediate plate 13, the cell A 1, the intermediate frame 6, the cell B 2, and the end frame. They are stacked in the order of 17. The protruding surface portions 4 of the cells A1 and B2 are arranged so as to face each other in the intermediate frame 6, and the protruding surface portions 4 are bonded to each other. The flat portions 5 of the cells A1 and B2 arranged on the outer side are bonded and fixed to the cell bonding surfaces of the end frames 17, respectively, and the flat portions 5 of the cells A1 and B2 arranged on the inner side are bonded to the intermediate plate 13. It is fixed.

図３及び図４に示すように、接続ナット保持穴８内にインサート成形された接続ナット２２の上面には、正極端子と負極端子とが重ね合わされセル間接続ボルト２３で締結固定されており、４個のセルは直列接続されている。なお、接続ナット保持穴８、接続ナット２２及びセル間接続ボルト２３は、接続固定部として機能する。組電池固定部材１９及び平板間固定部材２０は、両端の端枠１７の外側から固定ネジ２１で上述したネジ穴１８締結固定されている。従って、端枠１７及び中間板１３は固定ネジ２１により中間枠６に固定されており、セルＡ１及びセルＢ２の平面部５は冷却風の流通経路を除き端枠１７及び中間板１３で覆われている。   As shown in FIGS. 3 and 4, the positive terminal and the negative terminal are superimposed on the upper surface of the connection nut 22 that is insert-molded in the connection nut holding hole 8, and fastened and fixed by the inter-cell connection bolt 23. Four cells are connected in series. The connection nut holding hole 8, the connection nut 22, and the inter-cell connection bolt 23 function as a connection fixing portion. The assembled battery fixing member 19 and the inter-plate fixing member 20 are fastened and fixed to the above-described screw holes 18 with fixing screws 21 from the outside of the end frames 17 at both ends. Therefore, the end frame 17 and the intermediate plate 13 are fixed to the intermediate frame 6 by the fixing screws 21, and the flat portions 5 of the cells A1 and B2 are covered with the end frame 17 and the intermediate plate 13 except for the cooling air flow path. ing.

組電池固定部材１９には固定ボルト２８が挿通する穴が形成されており、固定ボルト２８で組電池２４が基台２５に固定されている。また、組電池２４の上部には電圧検出線がプリントされたフレキシブル基板とその検出電圧を出力するコネクタとで構成されたコネクタ付電圧検出線２９が配置されており、電圧検出線の先端は各セルの端子に接続固定されている。   A hole through which the fixing bolt 28 is inserted is formed in the assembled battery fixing member 19, and the assembled battery 24 is fixed to the base 25 by the fixing bolt 28. In addition, a voltage detection line 29 with a connector configured by a flexible substrate on which a voltage detection line is printed and a connector for outputting the detection voltage is arranged on the upper part of the assembled battery 24. The connection is fixed to the cell terminal.

（組み立て手順）
次に、本実施形態のモジュール電池２６の組み立て手順について説明する。 (Assembly procedure)
Next, an assembling procedure of the module battery 26 of the present embodiment will be described.

まず、正極、負極板の間にセパレータを介在させて積層して電極群を構成し、この電極群と非水電解液とを、金属箔を多層の樹脂層で被覆されてなるラミネートフィルムにて密封してセルを作製する。次いで、作製したセルの正極端子１−１を突出面部４側に屈曲させ、負極端子１−２を平面部５側に屈曲させてセルＡ１を得る。また、作製したセルを正極端子２−１、負極端子２−２共に突出面部４側に屈曲させてセルＢ１を得る。このような屈曲作業はラミネートフィルムの端子導出部を損傷しないように治具を用いて行われる。   First, an electrode group is formed by laminating a separator between a positive electrode and a negative electrode plate, and the electrode group and the non-aqueous electrolyte are sealed with a laminate film formed by coating a metal foil with a multilayer resin layer. To make a cell. Next, the positive electrode terminal 1-1 of the manufactured cell is bent toward the projecting surface portion 4 side, and the negative electrode terminal 1-2 is bent toward the flat surface portion 5 side to obtain the cell A1. In addition, both the positive electrode terminal 2-1 and the negative electrode terminal 2-2 are bent to the protruding surface portion 4 side to obtain the cell B1. Such a bending operation is performed using a jig so as not to damage the terminal lead-out portion of the laminate film.

次に、セルＡ１及びセルＢ２の周囲に中間枠６を配置し、セルＡ１及びセルＢ２の突出面部４同士が対向するよう接着すると共に、セルＡ１及びセルＢ２の傾斜面と中間枠６の傾斜面とを接着する。続いて、セルＡ１の突出面部４側に屈曲した端子とセルＢの突出面部４側に屈曲した端子を重ね合わせて接続ナット２２で接続固定する。次いで、中間板１３及び端枠１７の接着溝１４に接着剤を塗布して、セルＡ１及びセルＢ２の平面部５と端枠１７及び中間枠１３とを接着する。このとき、セルＡ１の平面部５側に屈曲した端子は中間枠１３を介して隣接するセルＢ２の突出面部４側に屈曲した端子と重ね合わされて接続固定する。次に、固定部材１９、２０を配設して、中間板１３及び端枠１７を固定ガイド凸１０、固定ガイド凹１１で中間枠６に対して位置決めし、固定部材１９、２０をネジで固定する。そして、コネクタ付電圧検出線２９の電圧検出線の端部を各端子にスポット溶接し、コネクタを所定の位置に固定して組電池２４を作製する。なお、コネクタの固定はコネクタ付電圧検出線２９（フレキシブル基板）をネジ止めしてもよいし、接着剤で接着するようにしてもよい。   Next, the intermediate frame 6 is disposed around the cell A1 and the cell B2, and bonded so that the protruding surface portions 4 of the cell A1 and the cell B2 face each other, and the inclined surfaces of the cell A1 and the cell B2 and the intermediate frame 6 are inclined. Glue the surface. Subsequently, the terminal bent to the protruding surface portion 4 side of the cell A1 and the terminal bent to the protruding surface portion 4 side of the cell B are overlapped and connected and fixed by the connection nut 22. Next, an adhesive is applied to the bonding grooves 14 of the intermediate plate 13 and the end frame 17 to bond the flat portions 5 of the cells A1 and B2 to the end frame 17 and the intermediate frame 13. At this time, the terminal bent toward the flat portion 5 side of the cell A1 is overlapped with the terminal bent toward the protruding surface portion 4 side of the adjacent cell B2 via the intermediate frame 13 to be connected and fixed. Next, the fixing members 19 and 20 are disposed, the intermediate plate 13 and the end frame 17 are positioned with respect to the intermediate frame 6 by the fixing guide protrusion 10 and the fixing guide recess 11, and the fixing members 19 and 20 are fixed by screws. To do. Then, the end of the voltage detection line of the voltage detection line with connector 29 is spot-welded to each terminal, and the connector is fixed at a predetermined position to produce the assembled battery 24. The connector may be fixed by screwing the voltage detection line with connector 29 (flexible substrate) or by bonding with an adhesive.

次に、組電池２４を固定ボルト２８で基台２５に固定する。このとき、組電池２４の負極外部端子（負極端子１−２）は隣の組電池２４の正極外部端子（正極端子２−１）に重なり合っている。これらの外部端子同士を組電池２４でセル間接続ボルト２３と同一の（組電池間接続）ボルトで接続固定する。そして、組電池２４の上部に絶縁カバー２９をネジ止めすることで、モジュール電池２６を完成させる。   Next, the assembled battery 24 is fixed to the base 25 with fixing bolts 28. At this time, the negative electrode external terminal (negative electrode terminal 1-2) of the assembled battery 24 overlaps with the positive electrode external terminal (positive electrode terminal 2-1) of the adjacent assembled battery 24. These external terminals are connected and fixed by the assembled battery 24 with the same bolt (inter-battery connection) bolt as the inter-cell connection bolt 23. Then, the module battery 26 is completed by screwing the insulating cover 29 on the upper part of the assembled battery 24.

（作用等）
次に、本実施形態のモジュール電池２６の作用等について組電池２４を中心に説明する。 (Action etc.)
Next, the operation and the like of the module battery 26 of the present embodiment will be described focusing on the assembled battery 24.

本実施形態のモジュール電池２６を構成する組電池２４には、セルＡ１とセルＢ２との２種のセルが用いられている。これらのセルは、ラミネートフィルム内に平板状の極板群が封入されており、ラミネートフィルムの一方の面が略平面の平面部５と他方の面が突出した突出面部４とを有し、正負極端子が平面部５に沿ってラミネートフィルムの一辺から外部に導出されている。セルＡ１の各端子の先端部は平面部５側と突出面部４側とにそれぞれ屈曲されており、セルＢ２の両端子の先端部は突出面部４側に屈曲されている。セルＡ１とセルＢ２とは、突出面部４同士が対向するように配置されており、樹脂材からなる中間枠６に固定されている。そして、セルＡ１の突出面部４側に屈曲された端子とセルＢ２の突出面部４側に屈曲された端子とが重ね合わされ接続されている。従って、組電池２４では、各端子の先端部が平面部５側と突出面部４側とに屈曲されたセルＡ１と、両端子の先端部が突出面部４側に屈曲されたセルＢ２との２種のセルを用い、セルＡ１とセルＢ２とを突出面部４同士が対向するように積層したので、異極端子同士の先端部が重ね合わされて簡単に接続できるため、組立性が向上する。また、ブスバ等の導通部品を新たに必要としないため、低コスト化及び小型化を実現できる。更に、柔軟なラミネートフィルムに密閉されたセルが中間枠６に固定されているので、セルの耐振性及び外力に対する耐衝撃性を高めることができる。   For the assembled battery 24 constituting the module battery 26 of the present embodiment, two types of cells, a cell A1 and a cell B2, are used. Each of these cells has a flat plate group enclosed in a laminate film, one surface of the laminate film has a substantially flat plane portion 5 and a protruding surface portion 4 from which the other surface protrudes. The electrode terminals are led out from one side of the laminate film along the flat portion 5. The tip of each terminal of the cell A1 is bent to the flat surface 5 side and the protruding surface portion 4 side, and the tip of both terminals of the cell B2 is bent to the protruding surface portion 4 side. The cell A1 and the cell B2 are arranged so that the protruding surface portions 4 face each other, and are fixed to an intermediate frame 6 made of a resin material. And the terminal bent to the protruding surface part 4 side of the cell A1 and the terminal bent to the protruding surface part 4 side of the cell B2 are overlapped and connected. Therefore, in the assembled battery 24, the cell A1 in which the distal end portion of each terminal is bent toward the flat surface portion 5 side and the projecting surface portion 4 side, and the cell B2 in which the distal end portions of both terminals are bent toward the projecting surface portion 4 side. Since the cell A1 and the cell B2 are stacked so that the projecting surface portions 4 face each other using a seed cell, the tips of the different polarity terminals can be overlapped and easily connected, so that the assemblability is improved. In addition, since a conductive part such as a bus bar is not newly required, cost reduction and size reduction can be realized. Furthermore, since the cell sealed by the flexible laminate film is fixed to the intermediate frame 6, it is possible to improve the vibration resistance of the cell and the impact resistance against external force.

また、組電池２４では、セルＡ１とセルＢ２との突出面部４同士が接着固定されているので、より耐振性を高め小型化を図ることができる。更に、セルＡ１の平面部５とセルＢ２の平面部５とが中間枠６に支持された端枠１７及び中間板１３で覆われているので、平面部５側の耐衝撃性を更に高めることができ、端枠１７及び中間板１３が中間枠６に支持されているため、セルの耐振性を更に高めることができると共に、外力を受けても端子が個別に振動することが無いので、ラミネートフィルムにおける端子部の破損及びその周囲部の密閉性も維持できるため組電池の信頼性を確保することができる。   Moreover, in the assembled battery 24, since the protrusion surface parts 4 of cell A1 and cell B2 are adhere | attached and fixed, vibration resistance can be improved and size reduction can be achieved. Furthermore, since the flat surface portion 5 of the cell A1 and the flat surface portion 5 of the cell B2 are covered with the end frame 17 and the intermediate plate 13 supported by the intermediate frame 6, the impact resistance on the flat surface portion 5 side is further enhanced. Since the end frame 17 and the intermediate plate 13 are supported by the intermediate frame 6, the vibration resistance of the cell can be further improved, and the terminals do not vibrate individually even when external force is applied. Since the damage of the terminal part in a film and the sealing property of the surrounding part can also be maintained, the reliability of an assembled battery can be ensured.

更に、組電池２４では、端枠１７及び中間板１３に通風用の冷却穴１６が形成されていると共に、冷却通路１５が形成されているので、冷却穴１６に冷却風を流通させることで、効率的にセルを冷却することができる。従って、セル環境温度を一定に保つことが可能となり、セル性能のバラツキを小さくできる。また、中間枠６の周面に通風用の開口部７が形成されていので、組電池２４の周囲も冷却ができるため、セル性能のバラツキをさらに小さくすることができる。   Furthermore, in the assembled battery 24, the cooling holes 16 for ventilation are formed in the end frame 17 and the intermediate plate 13, and the cooling passage 15 is formed. Therefore, by circulating the cooling air through the cooling holes 16, The cell can be efficiently cooled. Therefore, the cell environmental temperature can be kept constant, and the variation in cell performance can be reduced. In addition, since the ventilation opening 7 is formed on the peripheral surface of the intermediate frame 6, the periphery of the assembled battery 24 can be cooled, so that the variation in cell performance can be further reduced.

また、組電池２４では、中間枠６の上面にセルＡ１及びセルＢ２の電圧検出用のコネクタが配置されているので、電圧検出線の接続作業の向上を図ることができる。更に、中間枠６の上面にセルＡ１及びセルＢ２の端子の接続固定部が設けられているので、端子間の接続作業の効率化を図ることができる。また更に、中間枠６及び中間板１３にセル間端子絶縁壁１２が突出形成されているので、組電池２４製造中の端子間の外部短絡を防止することができる。更に、セルＡ１とセルＢ２とを配置した中間枠６を複数化し、これら複数の中間枠６がセルＢ２の平面部５側とセルＡ１の平面部５側とが対向するように隣接固定し、セルＡ１の平面部５側に屈曲された端子とセルＢの突出面部４側に屈曲された端子とが重ね合わされ接続されているので、換言すれば、ユニット化された中間枠６を積層することで、組電池２４を構成するセル数を２以上の任意の偶数個とすることができるため、要望されたセル数に応じて組電池２４を構成することができる。   Moreover, in the assembled battery 24, since the connector for voltage detection of the cell A1 and the cell B2 is arranged on the upper surface of the intermediate frame 6, the connection work of the voltage detection line can be improved. Furthermore, since the connection fixing portions for the terminals of the cell A1 and the cell B2 are provided on the upper surface of the intermediate frame 6, it is possible to improve the efficiency of the connection work between the terminals. Furthermore, since the inter-cell terminal insulating wall 12 protrudes from the intermediate frame 6 and the intermediate plate 13, an external short circuit between the terminals during manufacturing of the assembled battery 24 can be prevented. Furthermore, the intermediate frame 6 in which the cells A1 and B2 are arranged is divided into a plurality of pieces, and the plurality of intermediate frames 6 are adjacently fixed so that the plane portion 5 side of the cell B2 and the plane portion 5 side of the cell A1 face each other. Since the terminal bent to the flat surface portion 5 side of the cell A1 and the terminal bent to the protruding surface portion 4 side of the cell B are overlapped and connected, in other words, the unitized intermediate frame 6 is stacked. Thus, since the number of cells constituting the assembled battery 24 can be any even number of 2 or more, the assembled battery 24 can be configured according to the desired number of cells.

更に、本実施形態のモジュール電池２６では、上記の作用効果を奏する組電池２４が１２個、組電池固定部材１９及び固定ボルト２８により基台２５に固定されているので、耐振動、耐衝撃性が更に向上し、複数個の組電池２４を基台２５に一括して固定できるので、固定作業も簡便になるため生産コストの低減も可能となると共に大電力電源として使用することができる。また、本実施形態のモジュール電池２６では、端子を覆い、かつ、電圧検出用コネクタの部分が開口した絶縁カバー２８を備えているので、コネクタによる接続を確保することができると共に、接続された端子部や電圧検出線を保護、絶縁できるため、安全性を向上させることができる。   Further, in the module battery 26 of the present embodiment, twelve assembled batteries 24 having the above-described effects are fixed to the base 25 by the assembled battery fixing member 19 and the fixing bolt 28, so that vibration resistance and impact resistance are improved. Further improved, a plurality of assembled batteries 24 can be fixed together on the base 25, so that the fixing work is simplified, so that the production cost can be reduced and the power can be used as a high power source. Further, in the module battery 26 of the present embodiment, since the terminal is covered and the insulating cover 28 having the voltage detecting connector opened is provided, the connection by the connector can be ensured and the connected terminal Since the part and the voltage detection line can be protected and insulated, safety can be improved.

なお、本実施形態のモジュール電池２６では、組電池２４を４個のセルで構成する例を示したが、組電池２４を構成するセル数はこれに限らず、２個以上の偶数個で構成することができる。また、モジュール電池２６を構成するセル数が奇数個となる場合には、例えば、最低電位側のセルＢ２を使用せず端子の先端部のみをダミーとし、このダミー端子と一つ上位のセルＡ１の負極端子１−２と接続するようにすればよい。   In addition, in the module battery 26 of this embodiment, although the example which comprised the assembled battery 24 by four cells was shown, the number of cells which comprise the assembled battery 24 is not restricted to this, It comprises by an even number of 2 or more. can do. Further, when the number of cells constituting the module battery 26 is an odd number, for example, the cell B2 on the lowest potential side is not used and only the tip of the terminal is set as a dummy, and this dummy terminal and the cell A1 which is one higher level are used. The negative electrode terminal 1-2 may be connected.

また、本実施形態ではセルにリチウムイオン二次電池を例示したが、本発明はこれに限らず、種々の二次電池に適用可能なことは云うまでもない。更に、組電池２４では、接続ナット保持穴８に接続ナット８をインサート成形した例を示したが、接続ナット保持穴８は接続ナット２２を着接固定可能な形状であればよい。このような形態では中間枠６のコストを低減させることができる。   In the present embodiment, the lithium ion secondary battery is exemplified as the cell. However, the present invention is not limited to this and can be applied to various secondary batteries. Further, in the assembled battery 24, an example in which the connection nut 8 is insert-molded in the connection nut holding hole 8 is shown, but the connection nut holding hole 8 may have any shape that allows the connection nut 22 to be attached and fixed. In such a form, the cost of the intermediate frame 6 can be reduced.

更に、本実施形態では、基台２５の平面部に組電池２４を固定する例を示したが、基台２５に位置決め用の凹部ないし位置決め部材を配置することでモジュール電池２６の組立性を更に向上させることができる。そして、本実施形態では、１つの絶縁カバー２７でモジュール電池２６の上部を覆う例を示したが、組電池２４を絶縁カバーで覆うようにしてもよい。   Furthermore, in the present embodiment, an example in which the assembled battery 24 is fixed to the flat portion of the base 25 has been shown. However, by placing a positioning recess or a positioning member on the base 25, the assembly of the module battery 26 is further improved. Can be improved. In this embodiment, an example in which the upper part of the module battery 26 is covered with one insulating cover 27 is shown, but the assembled battery 24 may be covered with an insulating cover.

本発明は、組立性の向上、部品コストの低減化、小形軽量化を図り、信頼性の高い組電池及び該組電池を複数個有するモジュール電池を提供するものであるため、組電池及びモジュール電池の製造、販売に寄与するので、産業上の利用可能性を有する。   The present invention provides an assembled battery and a module battery having a plurality of the assembled batteries, which are improved in assemblability, reduced in component cost, reduced in size and weight, and provide a module battery having a plurality of the assembled batteries. Since it contributes to the manufacture and sale of this product, it has industrial applicability.

本発明が適用可能な実施形態のモジュール電池の外観斜視図である。It is an external appearance perspective view of the module battery of embodiment which can apply this invention. 実施形態のモジュール電池の絶縁カバーを取り除いたときの外観斜視図である。It is an external appearance perspective view when the insulating cover of the module battery of the embodiment is removed. 実施形態のモジュール電池を構成する組電池の外観斜視図である。It is an external appearance perspective view of the assembled battery which comprises the module battery of embodiment. 組電池の分解斜視図である。It is a disassembled perspective view of an assembled battery. 組電池に使用される２種類のセルの外観斜視図である。It is an external appearance perspective view of two types of cells used for an assembled battery. 組電池の中間枠の外観斜視図である。It is an external appearance perspective view of the intermediate frame of an assembled battery. 組電池の中間板の外観斜視図である。It is an external appearance perspective view of the intermediate board of an assembled battery. 外面側及びセル接着面側からみたときの組電池の端枠の外観斜視図である。It is an external appearance perspective view of the end frame of an assembled battery when it sees from an outer surface side and a cell adhesion surface side.

符号の説明Explanation of symbols

１ セルＡ
１−１、２−１ 正極端子
１−２、２−２ 負極端子
２ セルＢ
６ 中間枠（枠体）
７ 開口部
８ 接続ナット保持穴（接続固定部の一部）
１２ セル間端子絶縁壁（突出部）
１３ 中間板（平板）
１５ 冷却通路（溝）
１６ 冷却穴（開口部）
１７ 端枠（平板）
１９ 組電池固定部材
２０ 平板間固定部材
２１ 固定ネジ（平板間固定部材の一部）
２２ 接続ナット（接続固定部の一部）
２３ セル間接続ボルト（接続固定部の一部）
２４ 組電池
２５ 基台
２６ モジュール電池
２７ 絶縁カバー（電気絶縁性カバー）
２８ 固定ボルト（組電池固定部材の一部） 1 Cell A
1-1, 2-1 Positive terminal 1-2, 2-2 Negative terminal 2 Cell B
6 Intermediate frame (frame)
7 Opening 8 Connection nut holding hole (part of connection fixing part)
12 Inter-cell terminal insulation wall (protrusion)
13 Intermediate plate (flat plate)
15 Cooling passage (groove)
16 Cooling hole (opening)
17 End frame (flat plate)
19 Battery assembly fixing member 20 Flat plate fixing member 21 Fixing screw (part of flat plate fixing member)
22 Connection nut (part of connection fixing part)
23 Connection bolt between cells (part of connection fixing part)
24 assembled battery 25 base 26 module battery 27 insulating cover (electrical insulating cover)
28 Fixing bolt (part of battery pack fixing member)

Claims (13)

ラミネートフィルム内に平板状の極板群が封入されたセルを複数個組み合わせた組電池であって、前記セルは前記ラミネートフィルムの一方の面が略平面の平面部と他方の面が突出した突出面部とを有し、正極端子及び負極端子が前記平面部に沿って前記ラミネートフィルムの一辺から外部に導出されており、各端子の先端部が前記平面部側と突出面部側とにそれぞれ屈曲されたセルＡと、両端子の先端部が前記突出面部側に屈曲されたセルＢとの２種からなり、前記セルＡとセルＢとは、前記突出面部同士が対向するように配置され、電気絶縁性材料からなる共通の枠体に固定されており、前記セルＡの前記突出面部側に屈曲された端子と前記セルＢの前記突出面部側に屈曲された端子とが重ね合わされ接続されていることを特徴する組電池。   A battery pack in which a plurality of cells in which a plate-shaped electrode plate group is enclosed in a laminate film are combined, wherein the cell has a substantially flat plane portion on one surface and a projection in which the other surface protrudes. A positive electrode terminal and a negative electrode terminal are led out from one side of the laminate film along the flat surface portion, and a tip portion of each terminal is bent to the flat surface portion side and the protruding surface portion side, respectively. Cell A and cell B in which the tips of both terminals are bent toward the protruding surface, and the cell A and cell B are arranged so that the protruding surfaces face each other. It is fixed to a common frame made of an insulating material, and a terminal bent on the protruding surface portion side of the cell A and a terminal bent on the protruding surface portion side of the cell B are overlapped and connected. Characteristic of the assembly . 前記セルＡとセルＢとの突出面部同士が接着固定されていることを特徴とする請求項１に記載の組電池。   The assembled battery according to claim 1, wherein the protruding surface portions of the cell A and the cell B are bonded and fixed to each other. 前記セルＡの平面部と前記セルＢの平面部とは、前記枠体に支持された電気絶縁性の平板で覆われていることを特徴とする請求項１又は請求項２に記載の組電池。   3. The assembled battery according to claim 1, wherein the planar portion of the cell A and the planar portion of the cell B are covered with an electrically insulating flat plate supported by the frame body. . 前記平板の幅は前記枠体の幅より大きく、前記枠体の外側で前記平板間を固定する平板間固定部材により前記枠体に固定されていることを特徴とする請求項３に記載の組電池。   The set according to claim 3, wherein a width of the flat plate is larger than a width of the frame body, and the flat plate is fixed to the frame body by an inter-plate fixing member that fixes the space between the flat plates outside the frame body. battery. 前記平板には通風用の開口部が形成されていると共に、少なくとも側面側に通風用の溝が形成されていることを特徴とする請求項３又は請求項４に記載の組電池。   The assembled battery according to claim 3 or 4, wherein a ventilation opening is formed in the flat plate, and a ventilation groove is formed at least on a side surface side. 前記枠体の周面には、通風用の開口部が形成されていることを特徴とする請求項１乃至請求項５のいずれか１項に記載の組電池。   The assembled battery according to any one of claims 1 to 5, wherein an opening for ventilation is formed on a peripheral surface of the frame body. 前記枠体の上面に前記セルＡ及びセルＢの電圧検出用コネクタが配置されていることを特徴とする請求項１乃至請求項６のいずれか１項に記載の組電池。   The assembled battery according to any one of claims 1 to 6, wherein connectors for detecting voltages of the cells A and B are arranged on an upper surface of the frame. 前記枠体の上面に前記セルＡ及びセルＢの端子の接続固定部が設けられていることを特徴とする請求項１乃至請求項７のいずれか１項に記載の組電池。   The assembled battery according to any one of claims 1 to 7, wherein a connection fixing portion for the terminals of the cell A and the cell B is provided on an upper surface of the frame body. 前記平板には、前記セルＡの突出面部側に屈曲された端子に相対するように突出部が形成されていることを特徴とする請求項８に記載の組電池。   The assembled battery according to claim 8, wherein a protrusion is formed on the flat plate so as to face a terminal bent toward the protrusion surface of the cell A. 前記枠体には、前記セルＡの平面部側に屈曲された端子に相対するよう突出部が形成されていることを特徴とする請求項８又は請求項９に記載の組電池。   The assembled battery according to claim 8 or 9, wherein a projecting portion is formed on the frame body so as to face a terminal bent toward the flat portion side of the cell A. 前記端子を覆い、かつ、前記電圧検出用コネクタの部分が開口した電気絶縁性カバーを更に備えたことを特徴とする請求項８乃至請求項１０のいずれか１項に記載の組電池。   The assembled battery according to any one of claims 8 to 10, further comprising an electrically insulating cover that covers the terminal and is open at a portion of the voltage detection connector. 前記枠体は複数であり、これら複数の枠体が前記セルＢの平面部側と前記セルＡの平面部側とが対向するように隣接固定され、前記セルＡの平面部側に屈曲された端子と前記セルＢの突出面部側に屈曲された端子とが重ね合わされ接続されていることを特徴とする請求項１乃至請求項１１のいずれか１項に記載の組電池。   The frame body is plural, and the plurality of frame bodies are adjacently fixed so that the plane portion side of the cell B and the plane portion side of the cell A face each other, and bent to the plane portion side of the cell A. The assembled battery according to any one of claims 1 to 11, wherein a terminal and a terminal bent on the protruding surface portion side of the cell B are overlapped and connected. 請求項１乃至請求項１２のいずれか１項に記載の組電池を複数個有するモジュール電池であって、前記複数個の組電池を載置するための基台と、前記複数個の組電池を前記基台に固定する組電池固定部材とを備えたことを特徴とする電池モジュール。   A module battery having a plurality of assembled batteries according to any one of claims 1 to 12, wherein a base on which the plurality of assembled batteries are mounted, and the plurality of assembled batteries. A battery module comprising: an assembled battery fixing member that is fixed to the base.
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