JP2011071053A - Flat square battery and battery pack - Google Patents

Flat square battery and battery pack Download PDF

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JP2011071053A
JP2011071053A JP2009223154A JP2009223154A JP2011071053A JP 2011071053 A JP2011071053 A JP 2011071053A JP 2009223154 A JP2009223154 A JP 2009223154A JP 2009223154 A JP2009223154 A JP 2009223154A JP 2011071053 A JP2011071053 A JP 2011071053A
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external terminal
positive
flat
battery
negative
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JP5478175B2 (en
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Takahiro Soma
貴宏 相馬
Takenori Ishizu
竹規 石津
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Vehicle Energy Japan Inc
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Hitachi Vehicle Energy Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

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Abstract

<P>PROBLEM TO BE SOLVED: To reduce internal resistance of a battery pack by arranging a plurality of identical flat batteries so that front and rear faces are alternately reversed, and by joining a positive electrode external terminal to a negative electrode external terminal of opposing broad width faces of the neighboring flat batteries. <P>SOLUTION: The battery pack 100 is constituted by deploying a plurality of flat rectangular batteries 200 of a flat rectangular parallelepiped shape in series, by opposing their broad width faces 202, 204, while in respective flat rectangular batteries, a positive electrode external terminal is installed on one broad width face, and a negative electrode external terminal is installed on the other broad width face. The positive electrode external terminal in a broad width face of one piece of flat rectangular battery and the negative electrode external terminal on the broad width face are formed in a corresponding shape on the rear side of symmetric position against the center in the broad width face. That is, in one piece of the flat rectangular battery, the positive electrode external terminal completely coincides with the negative electrode external terminal of the broad width face (rear side) when the broad width face is rotated 180° around the center. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は扁平角型電池、および扁平角型電池を接続した組電池に関する。   The present invention relates to a flat rectangular battery and a battery pack to which the flat rectangular battery is connected.

ハイブリット車両等に搭載される電池には、５０Ｖ以上の高出力電圧と大電力を要求されるため、複数の単位電池を直列接続した組電池が一般に使用される。単位電池は種々検討されているが、扁平角型電池はパック化した際の体積効率が優れているため有望である。   A battery mounted on a hybrid vehicle or the like is required to have a high output voltage of 50 V or more and a large power, and therefore an assembled battery in which a plurality of unit batteries are connected in series is generally used. Various unit batteries have been studied, but flat rectangular batteries are promising because of their excellent volumetric efficiency when packed.

扁平角型電池よりなる組電池は、取り扱い易い形状とするために、単位電池を、幅広面を対向させて直列に配列する。このため、従来の扁平角形電池には、幅広面周囲の細長面に正極および負極の外部端子を設け、バスバー等で連結している（特許文献１参照）。   In order to make an assembled battery made of flat rectangular batteries easy to handle, unit batteries are arranged in series with the wide surfaces facing each other. For this reason, in the conventional flat rectangular battery, positive and negative external terminals are provided on an elongated surface around a wide surface and connected by a bus bar or the like (see Patent Document 1).

特開２００８−０９１１８３号公報JP 2008-091183 A

従来の扁平角型電池を用いた組電池では、細長面に正極および負極の外部端子を設けるため、各極集電部と外部端子との距離が比較的長くなり、電気抵抗が大きい。さらに、隣り合う扁平角型電池は、バスバー等を用いて正極外部端子と負極外部端子を連結するため、バスバーが抵抗となり無視できない電力損失が生じる。   In a battery pack using a conventional flat prismatic battery, positive and negative external terminals are provided on the elongated surface, so that the distance between each electrode current collector and the external terminal is relatively long, and the electric resistance is large. Further, since the adjacent flat rectangular batteries connect the positive external terminal and the negative external terminal using a bus bar or the like, the bus bar becomes a resistance, resulting in a power loss that cannot be ignored.

（１）請求項１の発明は、それぞれが正極外部端子と負極外部端子を有する複数の扁平形電池を接続して構成される組電池において、各扁平形電池は、容器表面に容器厚み方向に対向する一対の幅広面を有し、各扁平角形電池の一方の幅広面には正極外部端子が設けられ、他方の幅広面には負極外部端子が設けられ、隣接する一対の扁平角形電池が互いに対向する各幅広面（対向幅広面と呼ぶ）において、一方の扁平形電池の対向幅広面には正極外部端子が、他方の扁平形電池の対向幅広面には負極外部端子が、互いに鏡像位置となるように配置され、かつ、前記正極外部端子および負極外部端子は、それぞれが相互接続のための対応する形状に形成されていることを特徴とする。
（２）請求項２の発明は、容器内に発電要素を収容し、複数組み合わされて組電池を構成する扁平形電池において、前記容器の厚み方向に対向する容器表裏面はそれぞれ幅広面であり、一方の幅広面に正極外部端子が設けられ、他方の幅広面に負極外部端子が設けられ、前記正極外部端子が設けられた前記幅広面を該幅広面を中心周りに１８０度回転したときの該正極外部端子の裏側の位置に前記負極外部端子が配置され、前記正極外部端子および前記負極外部端子は、組電池として他の扁平形電池の各外部端子と相互接続するための対応する形状に形成されていることを特徴とする。
（３）請求項３の発明は、請求項２に記載の扁平角形電池において、前記発電要素は、正極集電部を有するシート状正極と負極集電部を有するシート状負極とをシート状セパレータで絶縁しつつ捲回し、または積層して構成され、前記正極外部端子と正極集電部とを接続する正極接続部材と、前記負極外部端子と負極集電部とを接続する負極接続部材とをさらに備えることを特徴とする。
（４）請求項４の発明は、請求項２または３に記載の扁平角形電池において、前記正極外部端子および前記負極外部端子は平板状に形成されていることを特徴とする。
（５）請求項５の発明は、請求項２または３に記載の扁平角形電池において、前記正極外部端子および前記負極外部端子は、平板状の基部と、前記基部から略垂直に突出する突片とを備えた逆Ｔ字状に形成され、前記正極外部端子および前記負極外部端子は、前記突片の側面を接触しつつ相互に接続されることを特徴とする。
（６）請求項６の発明は、請求項２または３に記載の扁平角形電池において、前記正極外部端子または前記負極外部端子の一方は、平板状の基部と、前記基部から略垂直に突出する突片とを備えた逆Ｔ字状に形成され、前記正極外部端子または前記負極外部端子の他方は、平板状の基部と、前記基部から略垂直に突出する一対の突片とを備えた逆π字状に形成され、前記逆Ｔ字状の前記突片を前記逆π字状の前記突片間に挿入し、かつ両突片の側面を接触させつつ、前記正極外部端子と前記負極外部端子とが相互に接続されることを特徴とする。
（７）請求項７の発明は、請求項２または３に記載の扁平角形電池において、前記正極外部端子および前記負極外部端子は、平板状の基部と、前記基部から略垂直に突出する一対の突片とを備えた逆π字状に形成され、前記一方の逆Ｔ字状の一方の突片が、対向する前記逆Ｔ字状の前記突片間に挿入され、かつ両突片の側面を接触させつつ、前記正極外部端子と前記負極外部端子とが相互に接続されることを特徴とする。
（８）請求項８の発明による組電池は、請求項２乃至７のいずれかに記載の扁平角形電池を、各幅広面を対向させつつ正極外部端子と負極外部端子を接合して直列接続したことを特徴とする。 (1) The invention of claim 1 is an assembled battery configured by connecting a plurality of flat batteries each having a positive electrode external terminal and a negative electrode external terminal, and each flat battery is arranged on the container surface in the container thickness direction. Each flat rectangular battery has a pair of opposed wide surfaces, one of the flat rectangular batteries is provided with a positive external terminal, and the other wide surface is provided with a negative external terminal, so that a pair of adjacent flat rectangular batteries are connected to each other. In each of the opposing wide surfaces (referred to as opposing wide surfaces), the positive external terminal is on the opposing wide surface of one flat battery, the negative external terminal is on the opposing wide surface of the other flat battery, The positive electrode external terminal and the negative electrode external terminal are each formed in a corresponding shape for interconnection.
(2) According to the second aspect of the present invention, in the flat battery in which the power generation element is accommodated in the container and the assembled battery is configured by combining a plurality of elements, the front and back surfaces of the container facing the container in the thickness direction are wide surfaces A positive external terminal is provided on one wide surface, a negative external terminal is provided on the other wide surface, and the wide surface provided with the positive external terminal is rotated 180 degrees around the wide surface. The negative external terminal is disposed at a position on the back side of the positive external terminal, and the positive external terminal and the negative external terminal have a corresponding shape for interconnecting with each external terminal of another flat battery as an assembled battery. It is formed.
(3) The invention according to claim 3 is the flat rectangular battery according to claim 2, wherein the power generation element includes a sheet-like positive electrode having a positive electrode current collector and a sheet-like negative electrode having a negative electrode current collector. A positive electrode connection member connecting the positive external terminal and the positive current collector, and a negative connection member connecting the negative external terminal and the negative current collector. It is further provided with the feature.
(4) The invention according to claim 4 is the flat rectangular battery according to claim 2 or 3, wherein the positive external terminal and the negative external terminal are formed in a flat plate shape.
(5) The invention according to claim 5 is the flat rectangular battery according to claim 2 or 3, wherein the positive electrode external terminal and the negative electrode external terminal are a flat base portion and a projecting piece protruding substantially vertically from the base portion. The positive external terminal and the negative external terminal are connected to each other while contacting the side surfaces of the projecting pieces.
(6) The invention of claim 6 is the flat rectangular battery according to claim 2 or 3, wherein one of the positive external terminal and the negative external terminal protrudes substantially vertically from the flat base and the base. The other of the positive external terminal or the negative external terminal is a reverse including a flat base and a pair of protrusions protruding substantially vertically from the base. Formed in a π-shape, the inverted T-shaped projecting piece is inserted between the inverted π-shaped projecting pieces, and the side surfaces of both projecting pieces are in contact with each other while the positive external terminal and the negative external The terminals are connected to each other.
(7) The invention according to claim 7 is the flat rectangular battery according to claim 2 or 3, wherein the positive electrode external terminal and the negative electrode external terminal are a flat base and a pair of protrusions protruding substantially perpendicularly from the base. And one of the inverted T-shaped protrusions is inserted between the opposed inverted T-shaped protruding pieces, and the side surfaces of both protruding pieces. The positive external terminal and the negative external terminal are connected to each other while contacting each other.
(8) An assembled battery according to an eighth aspect of the present invention is the flat battery according to any one of the second to seventh aspects, wherein the positive external terminal and the negative external terminal are joined in series with each wide surface facing each other. It is characterized by that.

本発明によれば、組電池の内部抵抗を低減することができる。   According to the present invention, the internal resistance of the assembled battery can be reduced.

本発明による組電池の第１の実施の形態を示す斜視図である。It is a perspective view which shows 1st Embodiment of the assembled battery by this invention. 図１の組電池の分解斜視図である。It is a disassembled perspective view of the assembled battery of FIG. 図１の組電池の平面図である。It is a top view of the assembled battery of FIG. 本発明による組電池の第２の実施の形態を示す分解斜視図である。It is a disassembled perspective view which shows 2nd Embodiment of the assembled battery by this invention. 図４の組電池の平面図である。It is a top view of the assembled battery of FIG. 本発明による組電池の第３の実施の形態を示す分解斜視図である。It is a disassembled perspective view which shows 3rd Embodiment of the assembled battery by this invention. 図６の組電池の平面図である。It is a top view of the assembled battery of FIG. 本発明による組電池の第４の実施の形態を示す分解斜視図である。It is a disassembled perspective view which shows 4th Embodiment of the assembled battery by this invention. 図８の組電池の平面図である。It is a top view of the assembled battery of FIG.

次に、本発明による扁平角型電池および組電池の実施の形態を図面を参照して説明する。
［第１の実施の形態］ Next, embodiments of the flat rectangular battery and the assembled battery according to the present invention will be described with reference to the drawings.
[First Embodiment]

図１〜図３に示すように、組電池１００は、扁平直方体状の扁平角形電池２００を直列接続して構成される。扁平角形電池２００は、容器表面に容器厚み方向に対向する一対の幅広面２０２，２０４を有する。幅広面２０２，２０４は、容器の外周面で最も面積が大きい面である。これら一対の幅広面２０２、２０４の一方の幅広面２０２には正極外部端子２１０が設けられ、他方の幅広面２０４には負極外部端子２２０が設けられている。複数の扁平角型電池２００のうち、隣接する電池２００の正極外部端子２１０と負極外部端子２２０を接続して組電池が構成される。   As shown in FIGS. 1 to 3, the assembled battery 100 is configured by connecting flat rectangular batteries 200 having a flat rectangular parallelepiped shape in series. The flat rectangular battery 200 has a pair of wide surfaces 202 and 204 facing the container surface in the container thickness direction. The wide surfaces 202 and 204 are surfaces having the largest area on the outer peripheral surface of the container. A positive external terminal 210 is provided on one wide surface 202 of the pair of wide surfaces 202 and 204, and a negative external terminal 220 is provided on the other wide surface 204. Among the plurality of flat rectangular batteries 200, the assembled battery is configured by connecting the positive external terminal 210 and the negative external terminal 220 of the adjacent battery 200.

各扁平角形電池２００は、正極板３００、負極板３０２をセパレータ（図示省略）で絶縁しつつ捲回した扁平状の電極群３０４、または、正極板３００、負極板３０２をセパレータ（図示省略）で絶縁しつつ積層した扁平状の電極群３０４を電池缶２０６に収納して構成されている。なお、図１では、最も左に位置する扁平角形電池２００についてのみ、捲回タイプの捲回群３０４を示す。   Each flat prismatic battery 200 includes a flat electrode group 304 in which the positive electrode plate 300 and the negative electrode plate 302 are insulated while being insulated with a separator (not shown), or the positive electrode plate 300 and the negative electrode plate 302 with a separator (not shown). A flat electrode group 304 that is laminated while being insulated is housed in a battery can 206. In FIG. 1, only the flat rectangular battery 200 located on the leftmost side shows a wound type winding group 304.

正極板３００、負極板３０２には、捲回群３０４のＸ方向の両端部に、未塗工部（集電部）３０６、３０８がそれぞれ設けられている。正極外部端子２１０と集電部３０６、負極外部端子２２０と集電部３０８はそれぞれ、図示しない集電板などを介して電気的に接続されている。未塗工部（集電部）３０６、３０８は充分幅広に形成され、例えば、捲回群３０４の両端からそれぞれ１０ｍｍ以上の幅で形成される。   The positive electrode plate 300 and the negative electrode plate 302 are respectively provided with uncoated portions (current collector portions) 306 and 308 at both ends in the X direction of the wound group 304. The positive external terminal 210 and the current collector 306, and the negative external terminal 220 and the current collector 308 are electrically connected via a current collector plate (not shown). The uncoated portions (current collecting portions) 306 and 308 are formed to be sufficiently wide, for example, each having a width of 10 mm or more from both ends of the wound group 304.

１個の扁平角形電池２００の幅広面２０２における正極外部端子２１０と、幅広面２０４にける負極外部端子２２０とは、それぞれが幅広面２０２、２０４の中心軸Ｙに対して対称な位置の裏側（幅広面２０２、２０４は表裏の関係にあるため。）に対応する形状で形成される。すなわち、１個の扁平角形電池２００において、幅広面２０２(表面)をＹ軸周りに１８０度回転したときの正極外部端子２１０は、幅広面２０４（裏側）の負極外部端子２２０に重なった箇所に位置する。   The positive external terminal 210 on the wide surface 202 of one flat prismatic battery 200 and the negative external terminal 220 on the wide surface 204 are on the back side of the positions symmetrical to the central axis Y of the wide surfaces 202 and 204 ( The wide surfaces 202 and 204 are formed in a shape corresponding to the front and back. That is, in one flat prismatic battery 200, the positive external terminal 210 when the wide surface 202 (front surface) is rotated 180 degrees around the Y axis overlaps the negative external terminal 220 on the wide surface 204 (back side). To position.

隣接する扁平角形電池２００は、一の負極外部端子２２０が他方の正極外部端子２１０と対峙するように交互にＸ軸回りに１８０度回転して配置されている。   Adjacent flat rectangular batteries 200 are alternately rotated 180 degrees around the X axis so that one negative external terminal 220 faces the other positive external terminal 210.

なお、異なる形状の扁平角形電池２００を含めた場合には、１個の扁平角形電池２００における幅広面２０２の正極外部端子２１０の位置と、隣接配置される扁平角形電池２００における幅広面２０４の負極外部端子２２０の位置とを、相互に鏡像となるように配置し、正極外部端子２１０、負極外部端子２２０を、接続のための対応した形状とすることによって、直列配列された扁平角形電池２００のそれぞれの正極外部端子２１０は、隣接する扁平角形電池２００の負極外部端子２２０に対向し、正極外部端子２１０、負極外部端子２２０とを相互に接続することができる。   When the flat rectangular battery 200 having a different shape is included, the position of the positive external terminal 210 of the wide surface 202 in one flat rectangular battery 200 and the negative electrode of the wide surface 204 in the adjacent flat rectangular battery 200 are included. The positions of the external terminals 220 are arranged so as to be mirror images of each other, and the positive electrode external terminal 210 and the negative electrode external terminal 220 have a corresponding shape for connection. Each positive external terminal 210 faces the negative external terminal 220 of the adjacent flat rectangular battery 200 and can connect the positive external terminal 210 and the negative external terminal 220 to each other.

正極外部端子２１０と負極外部端子２２０とは、レーザビーム溶接等により接合されて相互に電気的に接続される。正極外部端子２１０、負極外部端子２２０は同一形状、この実施の形態では矩形の平板状に形成され、集電部３０６、３０８の延在方向に沿って充分長く形成されている。これによって、断面積の大きな電流路を短く形成することとなり、正極外部端子２１０、負極外部端子２２０自体の電気抵抗が低減される。また、それぞれ集電部３０６、３０８と充分な接続面積が確保されることによって、接続部の電気抵抗が低減されている。   The positive external terminal 210 and the negative external terminal 220 are joined together by laser beam welding or the like and electrically connected to each other. The positive external terminal 210 and the negative external terminal 220 are formed in the same shape, which is a rectangular flat plate in this embodiment, and are formed sufficiently long along the extending direction of the current collectors 306 and 308. As a result, a current path having a large cross-sectional area is formed short, and the electrical resistance of the positive external terminal 210 and the negative external terminal 220 itself is reduced. Moreover, the electrical resistance of a connection part is reduced by ensuring sufficient connection area with the current collection parts 306 and 308, respectively.

以上のとおり、正極外部端子２１０と負極外部端子２２０をそれぞれ幅広面２０２、２０４に設けたことにより、捲回群３０４の集電部３０６と正極外部端子２１０との距離、集電部３０８と負極外部端子２２０との距離は、扁平形電池容器の厚みよりも短くなり、集電部と外部端子間の内部抵抗を低減することができる。すなわち、従来の扁平角型電池では、集電部３０６，３０８の延在方向と同方向に外部端子が電池細長面から外方に突設しており、外部端子と集電部とを接続する集電板の全長が長くなるので、電流路が長く、かつ、断面積が小さくなり、内部抵抗が大きくなる。   As described above, by providing the positive electrode external terminal 210 and the negative electrode external terminal 220 on the wide surfaces 202 and 204, respectively, the distance between the current collector 306 and the positive electrode external terminal 210 of the wound group 304, the current collector 308 and the negative electrode The distance to the external terminal 220 is shorter than the thickness of the flat battery container, and the internal resistance between the current collector and the external terminal can be reduced. That is, in the conventional flat rectangular battery, the external terminal protrudes outward from the elongated surface of the battery in the same direction as the extending direction of the current collectors 306 and 308, and connects the external terminal and the current collector. Since the total length of the current collector plate is increased, the current path is increased, the cross-sectional area is decreased, and the internal resistance is increased.

さらに、隣接する扁平形電池の一方の正極外部端子２１０が他方の負極外部端子２２０に直接接触しつつ、相互に電気的に接続され、従来のバスバー等の接続部材が介在しないので、正極外部端子２１０、負極外部端子２２０間の電気抵抗は極めて小さい。   Furthermore, since one positive external terminal 210 of an adjacent flat battery is in direct contact with the other negative external terminal 220 and is electrically connected to each other without a conventional connecting member such as a bus bar, the positive external terminal The electrical resistance between 210 and the negative external terminal 220 is extremely small.

すなわち、本実施形態の組電池の内部抵抗は、従来に比較して、大幅に低減される。   That is, the internal resistance of the assembled battery of the present embodiment is greatly reduced as compared with the conventional case.

また、以上の実施の形態の組電池では、同一の複数の扁平形電池を交互に表裏面を反対にするように配置し、隣接する扁平形電池の対向する幅広面の正極外部端子と負極外部端子を接合している。したがって、一種類の扁平形電池を作成すれば良いので、量産効果も期待できる。
［第２の実施の形態］ Moreover, in the assembled battery of the above embodiment, the same plurality of flat batteries are alternately arranged so that the front and back surfaces are opposite to each other, and the wide positive electrode external terminal and the negative electrode external of the adjacent flat battery are opposed to each other. The terminals are joined. Therefore, since only one type of flat battery needs to be created, a mass production effect can be expected.
[Second Embodiment]

次に、本発明による扁平角型電池および組電池の第２の実施の形態を、図４、図５を参照して説明する。なお、図中第１の実施の形態と同一若しくは相当部分には同一符号を付し、説明を省略する。   Next, a second embodiment of the flat rectangular battery and the assembled battery according to the present invention will be described with reference to FIGS. In addition, the same code | symbol is attached | subjected to the part which is the same as that of 1st Embodiment in the figure, or an equivalent, and abbreviate | omits description.

第２の実施の形態は、第１の実施の形態における正極外部端子、負極外部端子の形状を変更したものである。   In the second embodiment, the shapes of the positive external terminal and the negative external terminal in the first embodiment are changed.

図４、図５に示すように、正極外部端子２１１、負極外部端子２２１は、平板状の基部２１１Ａ、２２１Ａと、基部２１１Ａ、２２１Ａから、対向する幅広面２０２または２０４に向かって略垂直に突出する突片２１１Ｂ、２２１Ｂとを備えた略逆Ｔ字状に形成されている。   As shown in FIGS. 4 and 5, the positive external terminal 211 and the negative external terminal 221 protrude from the flat base portions 211A and 221A and the base portions 211A and 221A substantially vertically toward the facing wide surface 202 or 204. The protrusions 211B and 221B are formed in a substantially inverted T shape.

突片２１１Ｂ、２２１Ｂは、側面２１１Ｓ、２２１Ｓを相互に接した状態でスポット溶接等によって接合され、電気的に接続される。側面２１１Ｓ、２２１Ｓを接触させるために、突片２１１Ｂと２２１Ｂが先端面で衝突しないように、突片２２１Ｂを、突片２１１Ｂの厚さ分、基部２２１Ａに対してＸ方向外方に変位して突設している。   The protruding pieces 211B and 221B are joined and electrically connected by spot welding or the like with the side surfaces 211S and 221S in contact with each other. In order to bring the side surfaces 211S and 221S into contact, the protruding piece 221B is displaced outward in the X direction with respect to the base portion 221A by the thickness of the protruding piece 211B so that the protruding pieces 211B and 221B do not collide at the tip surface. It is protruding.

なお、突辺２２１Ｂに代えて、突片２１１Ｂを変位させ、突片２１１Ｂ、２２１Ｂの両者を１／２の厚さづつ変位させ、あるいは、正極外部端子２１１または負極外部端子２２１の取り付け位置を変位させることも当然可能である。   Instead of the projecting side 221B, the projecting piece 211B is displaced, and both the projecting pieces 211B and 221B are displaced by 1/2 of the thickness, or the mounting position of the positive electrode external terminal 211 or the negative electrode external terminal 221 is displaced. Of course, it is also possible to make it.

第２の実施の形態は、第１の実施の形態の効果に加え、隣接する扁平形電池の外部端子同士を接続する際に、Ｘ方向の位置決めが容易であるという効果を奏する。
［第３の実施の形態］ In addition to the effect of the first embodiment, the second embodiment has an effect that positioning in the X direction is easy when connecting the external terminals of adjacent flat batteries.
[Third Embodiment]

次に、本発明による扁平角型電池および組電池の第３の実施の形態を、図６、図７を参照して説明する。なお、図中第１の実施の形態と同一若しくは相当部分には同一符号を付し、説明を省略する。   Next, a third embodiment of the flat rectangular battery and the assembled battery according to the present invention will be described with reference to FIGS. In addition, the same code | symbol is attached | subjected to the part which is the same as that of 1st Embodiment in the figure, or an equivalent, and abbreviate | omits description.

第３の実施の形態は、第２の実施の形態における正極外部端子または負極外部端子の形状をさらに変更したものである。   In the third embodiment, the shape of the positive external terminal or the negative external terminal in the second embodiment is further changed.

図６、図７に示すように、正極外部端子２１２は第２の実施の形態と同様に逆Ｔ字状に形成されている。一方、負極外部端子２２２は、基部２２２Ａと、基部２２２Ａから対向する幅広面２０２または２０４に向かって略垂直に突出する一対の突片２２２Ｂ、２２２Ｃとを備えた略逆π字状に形成されている。   As shown in FIGS. 6 and 7, the positive external terminal 212 is formed in an inverted T shape as in the second embodiment. On the other hand, the negative electrode external terminal 222 is formed in a substantially inverted π-shape including a base portion 222A and a pair of projecting pieces 222B and 222C that project from the base portion 222A toward the wide surface 202 or 204 facing each other. Yes.

突片２１２Ｂは、突片２２２Ｂ、２２２Ｃの間隙に挿入され、突片２１２Ｂの両側面２１２Ｓ、２１２Ｓが、突片２２２Ｂ、２２２Ｃの側面２２２Ｓ、２２２Ｓに接した状態で、電気的に接続される。側面２１２Ｓ、２２２Ｓ、２２２Ｓはスポット溶接等によって接合される。   The protruding piece 212B is inserted into the gap between the protruding pieces 222B and 222C, and is electrically connected in a state where both side surfaces 212S and 212S of the protruding piece 212B are in contact with the side surfaces 222S and 222S of the protruding pieces 222B and 222C. The side surfaces 212S, 222S, and 222S are joined by spot welding or the like.

突片２１２Ｂを突片２２２Ｂ、２２２Ｃの間隙に挿入するために、突片２１２Ｂは、突片２２２Ｂ、２２２Ｃの間隙位置に配置される。
なお、負極外部端子２２２を第２の実施の形態同様略Ｔ字状とし、正極外部端子２１２を逆π字状とすることも当然可能である。 In order to insert the protruding piece 212B into the gap between the protruding pieces 222B and 222C, the protruding piece 212B is disposed at the gap position between the protruding pieces 222B and 222C.
Of course, the negative external terminal 222 may be substantially T-shaped as in the second embodiment, and the positive external terminal 212 may be inverted π-shaped.

第３の実施の形態は、第２の実施の形態の効果に加え、隣接する扁平形電池の外部端子同士を接続する際に、Ｘ方向のより強固な位置決めが可能であるという効果を奏する。
［第４の実施の形態］ In addition to the effects of the second embodiment, the third embodiment has an effect that a stronger positioning in the X direction is possible when connecting the external terminals of adjacent flat batteries.
[Fourth Embodiment]

次に、本発明による扁平角型電池および組電池の第４の実施の形態を、図８、図９を参照して説明する。なお、図中第１の実施の形態と同一若しくは相当部分には同一符号を付し、説明を省略する。   Next, a fourth embodiment of the flat rectangular battery and the assembled battery according to the present invention will be described with reference to FIGS. In addition, the same code | symbol is attached | subjected to the part which is the same as that of 1st Embodiment in the figure, or an equivalent, and abbreviate | omits description.

第４の実施の形態は、第３の実施の形態における負極外部端子の逆π字状の形状を正極外部端子にも適用したものである。   In the fourth embodiment, the inverted π-shaped shape of the negative electrode external terminal in the third embodiment is also applied to the positive electrode external terminal.

図８、図９に示すように、正極外部端子２１３、負極外部端子２２３の両者が逆π字状に形成され、正極外部端子２１３の突片２１３Ｂ、２１３Ｃの一方が、負極外部端子２２３の突片２２３Ｂ、２２３Ｃの間隙に挿入され、負極外部端子２２３の突片２２３Ｂ、２２３Ｃの一方が、正極外部端子２１３の突片２１３Ｂ、２１３Ｃの間隙に挿入されている。このような噛み合いを実現するために、正極外部端子２１３、負極外部端子２２３は一方の突片の厚さ分、相互にＸ方向に変位している。   As shown in FIGS. 8 and 9, both the positive external terminal 213 and the negative external terminal 223 are formed in an inverted π shape, and one of the protrusions 213 </ b> B and 213 </ b> C of the positive external terminal 213 One of the protruding pieces 223B and 223C of the negative electrode external terminal 223 is inserted into the gap between the protruding pieces 213B and 213C of the positive electrode external terminal 213. In order to realize such engagement, the positive external terminal 213 and the negative external terminal 223 are displaced in the X direction by the thickness of one protrusion.

突片２１３Ｂ、２１３Ｃと突片２２３Ｂ、２２３Ｃとは、側面２１３Ｓ、２１３Ｓ、２２３Ｓ、２２３Ｓが接触しつつ電気的に接続されている。突片２１３Ｂ、２１３Ｃと突片２２３Ｂ、２２３Ｃはスポット溶接等によって接合されている。   The protrusions 213B and 213C and the protrusions 223B and 223C are electrically connected while the side surfaces 213S, 213S, 223S, and 223S are in contact with each other. The protruding pieces 213B and 213C and the protruding pieces 223B and 223C are joined by spot welding or the like.

第４の実施の形態は、第３の実施の形態の効果に加え、隣接する扁平形電池の外部端子同士を接続する際に、Ｘ方向のより強固な位置決めが可能であるという効果を奏する。   In the fourth embodiment, in addition to the effects of the third embodiment, there is an effect that stronger positioning in the X direction is possible when connecting the external terminals of adjacent flat batteries.

なお、正極外部端子、負極外部端子の形状は以上の実施例に限定されるものではなく、相互に接続し得る対応した任意の形状を採用することができる。   The shapes of the positive electrode external terminal and the negative electrode external terminal are not limited to the above-described embodiments, and any corresponding shapes that can be connected to each other can be adopted.

１００ 組電池 ２００ 扁平角形電池
２０２、２０４ 幅広面
２１０、２１１、２１２、２１３ 正極外部端子
２２０、２２１、２２２、２２３ 負極外部端子
３００ 正極板 ３０２ 負極板
３０４ 捲回群 ３０６，３０８ 集電部
100 assembled battery 200 flat rectangular battery 202, 204 wide surface 210, 211, 212, 213 positive external terminal 220, 221, 222, 223 negative external terminal 300 positive electrode 302 negative electrode
304 Winding group 306,308 Current collector

Claims (8)

それぞれが正極外部端子と負極外部端子を有する複数の扁平形電池を接続して構成される組電池において、
各扁平形電池は、容器表面に容器厚み方向に対向する一対の幅広面を有し、
各扁平角形電池の一方の幅広面には正極外部端子が設けられ、他方の幅広面には負極外部端子が設けられ、
隣接する一対の扁平角形電池が互いに対向する各幅広面（対向幅広面と呼ぶ）において、一方の扁平形電池の対向幅広面には正極外部端子が、他方の扁平形電池の対向幅広面には負極外部端子が、互いに鏡像位置となるように配置され、
かつ、前記正極外部端子および負極外部端子は、それぞれが相互接続のための対応する形状に形成されていることを特徴とする組電池。 In an assembled battery configured by connecting a plurality of flat batteries each having a positive external terminal and a negative external terminal,
Each flat battery has a pair of wide surfaces facing the container thickness direction on the container surface,
A positive external terminal is provided on one wide surface of each flat prismatic battery, and a negative external terminal is provided on the other wide surface,
In each of the wide surfaces (referred to as opposed wide surfaces) in which a pair of adjacent flat rectangular batteries face each other, a positive external terminal is provided on the opposed wide surface of one flat battery, and an opposed wide surface of the other flat battery is provided on the opposed wide surface. The negative external terminals are arranged so as to be mirror images of each other,
And the said positive electrode external terminal and negative electrode external terminal are each formed in the shape corresponding for interconnection. 容器内に発電要素を収容し、複数組み合わされて組電池を構成する扁平形電池において、
前記容器の厚み方向に対向する容器表裏面はそれぞれ幅広面であり、
一方の幅広面に正極外部端子が設けられ、他方の幅広面に負極外部端子が設けられ、
前記正極外部端子が設けられた前記幅広面を該幅広面を中心周りに１８０度回転したときの該正極外部端子の裏側の位置に前記負極外部端子が配置され、
前記正極外部端子および前記負極外部端子は、組電池として他の扁平形電池の各外部端子と相互接続するための対応する形状に形成されていることを特徴とする扁平角形電池。 In a flat battery that houses a power generation element in a container and constitutes an assembled battery by combining a plurality of elements,
Each of the container front and back surfaces facing the thickness direction of the container is a wide surface,
A positive external terminal is provided on one wide surface, a negative external terminal is provided on the other wide surface,
The negative external terminal is disposed at a position on the back side of the positive external terminal when the wide surface provided with the positive external terminal is rotated 180 degrees around the wide surface.
The flat positive battery, wherein the positive external terminal and the negative external terminal are formed in a corresponding shape for interconnecting with each external terminal of another flat battery as an assembled battery. 請求項２に記載の扁平角形電池において、
前記発電要素は、正極集電部を有するシート状正極と負極集電部を有するシート状負極とをシート状セパレータで絶縁しつつ捲回し、または積層して構成され、
前記正極外部端子と正極集電部とを接続する正極接続部材と、
前記負極外部端子と負極集電部とを接続する負極接続部材とをさらに備えることを特徴する扁平角形電池。 The flat rectangular battery according to claim 2,
The power generating element is configured by winding or laminating a sheet-like positive electrode having a positive electrode current collector and a sheet-like negative electrode having a negative electrode current collector while insulating with a sheet-like separator,
A positive electrode connecting member connecting the positive external terminal and the positive current collector;
A flat rectangular battery, further comprising a negative electrode connecting member that connects the negative electrode external terminal and the negative electrode current collector. 請求項２または３に記載の扁平角形電池において、
前記正極外部端子および前記負極外部端子は平板状に形成されていることを特徴する扁平角形電池。 The flat rectangular battery according to claim 2 or 3,
The flat rectangular battery, wherein the positive external terminal and the negative external terminal are formed in a flat plate shape. 請求項２または３に記載の扁平角形電池において、
前記正極外部端子および前記負極外部端子は、平板状の基部と、前記基部から略垂直に突出する突片とを備えた逆Ｔ字状に形成され、
前記正極外部端子および前記負極外部端子は、前記突片の側面を接触しつつ相互に接続されることを特徴とする扁平角形電池。 The flat rectangular battery according to claim 2 or 3,
The positive electrode external terminal and the negative electrode external terminal are formed in an inverted T shape having a flat plate-like base portion and a projecting piece protruding substantially perpendicularly from the base portion,
The flat rectangular battery, wherein the positive external terminal and the negative external terminal are connected to each other while contacting a side surface of the protruding piece. 請求項２または３に記載の扁平角形電池において、
前記正極外部端子または前記負極外部端子の一方は、平板状の基部と、前記基部から略垂直に突出する突片とを備えた逆Ｔ字状に形成され、
前記正極外部端子または前記負極外部端子の他方は、平板状の基部と、前記基部から略垂直に突出する一対の突片とを備えた逆π字状に形成され、
前記逆Ｔ字状の前記突片を前記逆π字状の前記突片間に挿入し、かつ両突片の側面を接触させつつ、前記正極外部端子と前記負極外部端子とが相互に接続されることを特徴とする扁平角形電池。 The flat rectangular battery according to claim 2 or 3,
One of the positive electrode external terminal or the negative electrode external terminal is formed in an inverted T shape having a flat plate-like base portion and a projecting piece protruding substantially perpendicularly from the base portion,
The other of the positive electrode external terminal or the negative electrode external terminal is formed in an inverted π-shape having a flat plate-like base portion and a pair of projecting pieces protruding substantially vertically from the base portion,
The positive external terminal and the negative external terminal are connected to each other while the inverted T-shaped protruding piece is inserted between the inverted π-shaped protruding pieces and the side surfaces of both protruding pieces are in contact with each other. A flat rectangular battery. 請求項２または３に記載の扁平角形電池において、
前記正極外部端子および前記負極外部端子は、平板状の基部と、前記基部から略垂直に突出する一対の突片とを備えた逆π字状に形成され、
前記一方の逆Ｔ字状の一方の突片が、対向する前記逆Ｔ字状の前記突片間に挿入され、かつ両突片の側面を接触させつつ、前記正極外部端子と前記負極外部端子とが相互に接続されることを特徴する扁平角形電池。 The flat rectangular battery according to claim 2 or 3,
The positive electrode external terminal and the negative electrode external terminal are formed in an inverted π shape including a flat plate-like base portion and a pair of projecting pieces protruding substantially vertically from the base portion,
The one positive T-shaped projecting piece is inserted between the opposing inverted T-shaped projecting pieces and the side surfaces of both projecting pieces are in contact with each other, while the positive external terminal and the negative external terminal And a rectangular battery characterized by being connected to each other. 請求項２乃至７のいずれかに記載の扁平角形電池を、各幅広面を対向させつつ正極外部端子と負極外部端子を接合して直列接続したことを特徴とする組電池。   8. A battery pack comprising the flat rectangular battery according to claim 2 connected in series by joining a positive external terminal and a negative external terminal with each wide surface facing each other.
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