JP2013098032A - Connection structure of voltage detection terminal - Google Patents

Connection structure of voltage detection terminal Download PDF

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JP2013098032A
JP2013098032A JP2011240198A JP2011240198A JP2013098032A JP 2013098032 A JP2013098032 A JP 2013098032A JP 2011240198 A JP2011240198 A JP 2011240198A JP 2011240198 A JP2011240198 A JP 2011240198A JP 2013098032 A JP2013098032 A JP 2013098032A
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voltage detection
piece
terminal
conductive path
electrode terminal
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Yuko Kinoshita
優子 木下
Shinichi Takase
慎一 高瀬
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Sumitomo Wiring Systems Ltd
AutoNetworks Technologies Ltd
Sumitomo Electric Industries Ltd
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Sumitomo Wiring Systems Ltd
AutoNetworks Technologies Ltd
Sumitomo Electric Industries Ltd
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

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  • Battery Mounting, Suspending (AREA)
  • Connection Of Batteries Or Terminals (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a connection structure of a voltage detection terminal, which can connect the voltage detection terminal with a simple method.SOLUTION: The connection structure of the voltage detection terminal which is connected to an electrode terminal 20 and detects voltage of unit cells 11 includes: an FPC 30 arranged in a unit cell group 10, which has a main body part 31 that is arranged along an aligning direction of the unit cells 11 and has a conductive path 32B formed therein that is arranged so as to extend in the aligning direction of the unit cells 11. The FPC 30 has extended pieces 36 provided thereon which have a voltage detection terminal 38 and a conductive path 34 for detection that continues from one terminal of the conductive path 32B and is connected to the voltage detection terminal 38, and are integrally extended from the main body part 31. The extended piece 36 has such a shape as to extend in the aligning direction of the unit cells 11, and has the voltage detection terminal 38 electrically connected with the electrode terminal 20.

Description

本発明は、電圧検知端子の接続構造に関する。   The present invention relates to a connection structure for voltage detection terminals.

電気自動車やハイブリッド車用の電池モジュールでは、出力を大きくするために多数の単電池が横並びに接続されている。隣り合う単電池の電極端子間はバスバーなどの接続部材で接続することにより複数の単電池が直列や並列に接続されるようになっている。ここで、複数の単電池を直列や並列に接続する場合、単電池間において電池電圧などの電池特性が不均一であると、電池の劣化や破損を招くという問題がある。   In battery modules for electric vehicles and hybrid vehicles, a large number of single cells are connected side by side in order to increase the output. A plurality of unit cells are connected in series or in parallel by connecting electrode terminals of adjacent unit cells with a connecting member such as a bus bar. Here, when a plurality of unit cells are connected in series or in parallel, there is a problem that if the battery characteristics such as the battery voltage are not uniform among the unit cells, the cells are deteriorated or damaged.

そこで、一般的な電池モジュールは、各単電池間の電圧に異常が生じる前に充電、放電を中止することができるように、単電池の電圧を検知するための構造(電圧検知構造)を備えている。電圧検知構造は、例えば、単電池の電極端子に接続される電圧検知端子と、電池ECUと、電圧検知端子とECUとを接続する電圧検知線などから構成される。各単電池の電圧は、ECUにより検知され、過放電、過充電状態になる前に充電、放電を中止するようにしている。   Therefore, a general battery module has a structure (voltage detection structure) for detecting the voltage of the unit cell so that charging and discharging can be stopped before the abnormality occurs in the voltage between the unit cells. ing. The voltage detection structure includes, for example, a voltage detection terminal connected to the electrode terminal of the unit cell, a battery ECU, a voltage detection line connecting the voltage detection terminal and the ECU, and the like. The voltage of each unit cell is detected by the ECU, and charging and discharging are stopped before the overdischarge or overcharge state is reached.

このような電圧検知構造を備える電池モジュールとしては、例えば、特許文献1に記載のものなどが知られている。   As a battery module provided with such a voltage detection structure, for example, a battery module described in Patent Document 1 is known.

特開2011−124176号公報JP 2011-124176 A

上記特許文献1には、電圧検知線の端末の露出導体を圧着により接続した電圧検知端子を単電池の電極端子に挿通させて、電極端子に接続部材とともにナットで共締めする構成が提案されている(特許文献1の図1を参照)。   Patent Document 1 proposes a configuration in which a voltage detection terminal in which an exposed conductor of a terminal of a voltage detection line is connected by crimping is inserted into an electrode terminal of a unit cell, and the electrode terminal is jointly fastened with a nut together with a connection member. (See FIG. 1 of Patent Document 1).

しかしながら、上記特許文献1に記載の電池モジュールにおいては、接続部材や電圧検知端子を接続ユニットに配置する作業、接続部材や電圧検知端子を配置した接続ユニットを複数連結する作業、ならびに、電圧検知端子を接続部材とともに電極端子にナット締めなどにより取り付ける作業を行う必要があり、電圧検知端子の接続作業に手間がかかるという問題があった。   However, in the battery module described in Patent Document 1, the operation of arranging the connection member and the voltage detection terminal in the connection unit, the operation of connecting a plurality of connection units in which the connection member and the voltage detection terminal are arranged, and the voltage detection terminal There is a problem that it takes time to connect the voltage detection terminal together with the connection member by fastening the nut to the electrode terminal by tightening the nut.

本発明は上記のような事情に基づいて完成されたものであって、簡易な方法により接続可能な電圧検知端子の接続構造を提供することを目的とする。   The present invention has been completed based on the above-described circumstances, and an object thereof is to provide a voltage detection terminal connection structure that can be connected by a simple method.

上記課題を解決すべく、1つのフレキシブルプリント基板(以下、FPCともいう)に、複数の電圧検知用の導電路を形成して、単電池群を構成する単電池に接続することを検討した。
しかしながら、単電池群は多数の単電池を並べて構成され、単電池の電極端子間には製造公差等が設定されているため、複数の単電池を並べてなる電池モジュールにおいては隣り合う単電池に形成された電極端子間のピッチがずれる場合がある。また、充放電による単電池の膨張収縮によって単電池の厚みがばらついて電極端子間のピッチがずれる場合もある。このように電極端子間のピッチのずれが生じると、電圧検知のための部材と単電池との電気的な接続に支障が生じて電圧検知ができなくなることが懸念される。
In order to solve the above-mentioned problems, a study was made to form a plurality of voltage detection conductive paths on one flexible printed circuit board (hereinafter also referred to as FPC) and to connect to the cells constituting the cell group.
However, the unit cell group is configured by arranging a large number of unit cells, and manufacturing tolerances are set between the electrode terminals of the unit cells. Therefore, in a battery module in which a plurality of unit cells are arranged, it is formed in adjacent unit cells. In some cases, the pitch between the electrode terminals is shifted. In addition, the thickness of the unit cell may vary due to the expansion and contraction of the unit cell due to charge / discharge, and the pitch between the electrode terminals may shift. If the pitch deviation between the electrode terminals occurs in this way, there is a concern that the voltage connection cannot be performed due to a problem in the electrical connection between the member for voltage detection and the unit cell.

そこで、さらなる検討の結果、本発明に到達した。
すなわち、本発明は、正極および負極の電極端子を有する複数の単電池を並べて接続してなる単電池群の、前記電極端子に接続されて前記単電池の電圧を検知する電圧検知端子の接続構造であって、前記単電池群には、前記単電池の並び方向に沿って配置されるとともに、前記単電池の並び方向に延びて配される導電路が形成された本体部を有するフレキシブルプリント基板が配され、前記フレキシブルプリント基板には、前記電圧検知端子と、前記導電路の一方の端末から連なり前記電圧検知端子に接続される検知用導電路とを有するとともに、前記本体部から一体的に延出された延出片が設けられ、前記延出片は、前記単電池の並び方向に延びる形状をなすとともに、前記電圧検知端子が前記電極端子と電気的に接続されているところに特徴を有する。
As a result of further studies, the present invention has been reached.
That is, the present invention provides a connection structure for a voltage detection terminal that is connected to the electrode terminal and detects the voltage of the unit cell, in a unit cell group formed by connecting a plurality of unit cells having positive and negative electrode terminals. And the flexible printed circuit board which has the main-body part by which the said battery cell group was formed along the arrangement direction of the said cell, and the conductive path extended and arranged in the arrangement direction of the said cell was formed. The flexible printed circuit board includes the voltage detection terminal and a detection conductive path connected to one of the terminals of the conductive path and connected to the voltage detection terminal. An extended extension piece is provided, and the extension piece has a shape extending in the arrangement direction of the unit cells, and the voltage detection terminal is electrically connected to the electrode terminal. With a butterfly.

本発明においては、導電路を形成した本体部と、導電路の一方の端末から連なる検知用導電路および電圧検知端子とを有する延出片と、を一体的に設けたフレキシブルプリント基板を、単電池群に配置して、延出片を単電池の電極端子に接続するだけで、単電池群に電圧検知端子を接続することができる。したがって、本発明によれば、簡易な方法により接続可能な電圧検知端子の接続構造を提供することができる。   In the present invention, a flexible printed circuit board integrally provided with a main body portion in which a conductive path is formed and an extending piece having a detection conductive path and a voltage detection terminal connected from one end of the conductive path is provided. The voltage detection terminal can be connected to the single cell group simply by arranging the battery in the battery group and connecting the extension piece to the electrode terminal of the single cell. Therefore, according to this invention, the connection structure of the voltage detection terminal which can be connected by a simple method can be provided.

また、本発明では、延出片が単電池の並び方向に延びる形状をなしているので、電極端子間のピッチのずれが生じたとしても、延出片によりずれを吸収することができるので、電圧検知端子と単電池との電気的な接続を確実なものとすることができる。   In the present invention, since the extending piece has a shape extending in the arrangement direction of the unit cells, even if a deviation in the pitch between the electrode terminals occurs, the deviation can be absorbed by the extending piece. The electrical connection between the voltage detection terminal and the single cell can be ensured.

本発明は、以下の構成であってもよい。
前記単電池には、前記フレキシブルプリント基板の前記延出片を載置する延出片載置部が設けられていてもよい。
延出片は単電池の並び方向に延びる形状をなしているので、途中で折れ曲がることがあり、このような場合には電極端子との接続に支障を生じることが懸念される。そこで、上記のような構成とすると、フレキシブルプリント基板の延出片を延出片載置部に載置することができるので、折れ曲るのを防止することができる。また、上記のような構成とすると、延出片を所定位置に載置することができるので、延出片の位置決めが容易となる。
The present invention may have the following configuration.
The unit cell may be provided with an extension piece placement portion for placing the extension piece of the flexible printed board.
Since the extending piece has a shape extending in the arrangement direction of the cells, it may be bent in the middle. In such a case, there is a concern that the connection with the electrode terminal may be hindered. Then, if it is set as the above structures, since the extended piece of a flexible printed circuit board can be mounted in an extended piece mounting part, it can prevent bending. Moreover, if it is set as the above structures, since an extension piece can be mounted in a predetermined position, positioning of an extension piece becomes easy.

前記正極および負極の電極端子は、電池本体から突出形成されるとともに、前記単電池の並び方向に撓み変形可能な金属板材から形成され、一方の極性の前記電極端子の先端には、隣り合う前記単電池の他方の極性の前記電極端子に接触可能な接続片部が設けられる一方、前記他方の極性の電極端子には前記接続片部を受け入れて挟みつけるとともに、前記フレキシブルプリント基板の前記延出片を受け入れて挟みつけるバネ部材が設けられ、前記フレキシブルプリント基板の前記延出片を前記バネ部材に挟持させることで、前記電圧検知端子が前記電極端子と接続される構成としてもよい。
このような構成とすると単電池間の接続にバスバーなどの接続部材が不要となり、そのうえ、フレキシブルプリント基板の延出片を電極端子に設けたバネ部材に挟持させるだけで、電圧検知端子と電極端子とが接続されるので、部品点数を減らすことができるとともに作業効率に優れる。
The positive electrode terminal and the negative electrode terminal are formed from a metal plate that protrudes from the battery body and can be bent and deformed in the direction in which the cells are arranged, and the tip of the electrode terminal of one polarity is adjacent to the electrode terminal. A connection piece that can contact the electrode terminal of the other polarity of the unit cell is provided, while the connection piece is received and sandwiched by the electrode terminal of the other polarity, and the extension of the flexible printed circuit board A spring member for receiving and sandwiching the piece may be provided, and the voltage detection terminal may be connected to the electrode terminal by sandwiching the extended piece of the flexible printed circuit board with the spring member.
With such a configuration, a connection member such as a bus bar is not required for connection between the cells, and the voltage detection terminal and the electrode terminal can be obtained simply by sandwiching the extended piece of the flexible printed circuit board with the spring member provided on the electrode terminal. Are connected, so that the number of parts can be reduced and work efficiency is excellent.

前記バネ部材には、前記接続片部を挟持する挟持バネ部と、前記延出片を挟持する補助バネ部とが一体的に設けられていてもよい。このような構成とすると、さらに部品点数を減らすことができる。   The spring member may be integrally provided with a sandwiching spring part that sandwiches the connection piece part and an auxiliary spring part that sandwiches the extension piece. With such a configuration, the number of parts can be further reduced.

前記補助バネ部には、前記延出片を前記単電池の並び方向に沿って挿入可能な延出片挿入口が形成されていてもよい。このような構成とすると延出片を延出片挿入口に挿入して補助バネ部に挟持させるだけで、電圧検知端子と電極端子とを接続することができるので、作業効率が向上する。   The auxiliary spring portion may be formed with an extension piece insertion port into which the extension piece can be inserted along the cell arrangement direction. With such a configuration, the voltage detection terminal and the electrode terminal can be connected simply by inserting the extension piece into the extension piece insertion port and sandwiching the extension piece between the extension spring insertion portion, so that the work efficiency is improved.

前記フレキシブルプリント基板には、隣り合う前記単電池の間に導入される導入片が前記本体部と一体的に設けられるとともに、前記本体部には、前記検知用導電路に接続される導電路以外の第2導電路が前記単電池の並び方向に延びて形成され、前記導入片には、前記第2導電路の一方の端末から連なる導入線部と、前記導入線部に実装されたサーミスタとが設けられ、前記導入片を隣り合う前記単電池の間に挿入することにより、前記サーミスタが前記単電池群に取り付けられるようになっていてもよい。
このような構成とすると、1つのフレキシブルプリント基板を単電池群に取り付けるだけで、電圧検知回路と温度制御用の回路の双方を接続することができるので、接続作業を簡素化できるうえに、部品点数を少なくすることもできる。
In the flexible printed circuit board, an introduction piece introduced between the adjacent unit cells is provided integrally with the main body portion, and the main body portion has a conductive path other than the conductive path connected to the detection conductive path. The second conductive path is formed to extend in the direction in which the single cells are arranged, and the introduction piece includes an introduction line portion continuous from one end of the second conduction path, and a thermistor mounted on the introduction line portion. The thermistor may be attached to the unit cell group by inserting the introduction piece between the adjacent unit cells.
With such a configuration, it is possible to connect both the voltage detection circuit and the temperature control circuit by simply attaching one flexible printed circuit board to the single cell group, so that the connection work can be simplified and components can be connected. The score can also be reduced.

本発明によれば、簡易な方法により接続可能な電圧検知端子の接続構造を提供することができる。   ADVANTAGE OF THE INVENTION According to this invention, the connection structure of the voltage detection terminal which can be connected by a simple method can be provided.

実施形態1の電池モジュールの斜視図The perspective view of the battery module of Embodiment 1. 電池モジュールの平面図Plan view of battery module 隣り合う単電池の電極端子の接続状態を示す一部断面図Partial sectional view showing the connection state of electrode terminals of adjacent unit cells 図2のA−A線における一部断面図Partial sectional view taken along line AA in FIG. 図4の一部拡大断面図Partially enlarged sectional view of FIG. 電池モジュールの一部平面図Partial plan view of the battery module 図2のB−B線における一部断面図Partial sectional view taken along line BB in FIG. 単電池の正極端子の正面図Front view of the positive terminal of the cell 単電池群にフレキシブルプリント基板を取り付ける様子を説明する斜視図The perspective view explaining a mode that a flexible printed circuit board is attached to a cell group フレキシブルプリント基板の一部拡大平面図Partial enlarged plan view of flexible printed circuit board

<実施形態>
本発明の一実施形態を、図1ないし図10を参照しつつ説明する。図1は、本発明の一実施形態に係る電池モジュールMの斜視図である。本実施形態の電池モジュールMは、電気自動車又はハイブリッド自動車等に搭載され、駆動用の電源として使用される。図1に示されるように、電池モジュールMは、単電池群10と、フレキシブルプリント基板30(以下FPC30ともいう)とを備える。以下では、図7の上方を上方、下方を下方として説明する。
<Embodiment>
An embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a perspective view of a battery module M according to an embodiment of the present invention. The battery module M of this embodiment is mounted on an electric vehicle, a hybrid vehicle, or the like, and is used as a driving power source. As shown in FIG. 1, the battery module M includes a unit cell group 10 and a flexible printed circuit board 30 (hereinafter also referred to as FPC 30). In the following description, the upper part of FIG.

本実施形態において、単電池群10は、複数個(本実施形態では24個)の単電池11を一列に並べて直列に接続したものである。詳しくは、単電池群10を構成する単電池11は、電極端子20の延出方向が互いに異なっている2種類の単電池11A,11Bからなり、これら二種類の単電池11A,11Bを交互に配置して接続することにより単電池群10が構成される。   In the present embodiment, the unit cell group 10 includes a plurality of (in the present embodiment, 24) unit cells 11 arranged in a line and connected in series. Specifically, the unit cell 11 constituting the unit cell group 10 is composed of two types of unit cells 11A and 11B in which the extending directions of the electrode terminals 20 are different from each other. These two types of unit cells 11A and 11B are alternately arranged. The unit cell group 10 is configured by arranging and connecting.

単電池11Aは、扁平な直方体状の電池本体12と、この電池本体12の上面から上方に向けて突出した正負一対の電極端子20(20A,20B)とを備える。   The unit cell 11 </ b> A includes a flat rectangular parallelepiped battery body 12 and a pair of positive and negative electrode terminals 20 (20 </ b> A, 20 </ b> B) protruding upward from the upper surface of the battery body 12.

電池本体12内には、例えば周知のリチウムイオン電池を構成する電池要素(図示せず)が収容されており、その電池要素の正極側が電極端子20A,負極側が電極端子20Bに連なっている。   In the battery body 12, for example, a battery element (not shown) constituting a known lithium ion battery is accommodated, and the positive electrode side of the battery element is connected to the electrode terminal 20A and the negative electrode side is connected to the electrode terminal 20B.

単電池11A(図1の左端から2番目の単電池11Aを参照)の一対の電極端子20のうち、図1の手前側にある一方の電極端子20Aが正極側の電極端子20A(正極端子20A)であり、奥側にある他方の電極端子20Bが負極側の電極端子20B(負極端子20B)である。   Of the pair of electrode terminals 20 of the unit cell 11A (see the second unit cell 11A from the left end in FIG. 1), one electrode terminal 20A on the near side in FIG. 1 is the positive electrode terminal 20A (positive terminal 20A). The other electrode terminal 20B on the back side is a negative electrode terminal 20B (negative electrode terminal 20B).

正極端子20Aと、負極端子20Bとは、共に単電池11の並び方向に撓み変形可能な薄板状の金属板材料から形成されている。正極端子20Aは、図1および図3に示すように、電池本体12の上面から上方に突出する立ち上がり部21Aと、立ち上がり部21Aの上端からL字状に折れ曲がって手前側(図示左側)に向かう平坦面部22Aと、平端部22Aの先端で先上がりに傾斜する操作部23とを備える。   Both the positive electrode terminal 20 </ b> A and the negative electrode terminal 20 </ b> B are made of a thin metal plate material that can be bent and deformed in the direction in which the cells 11 are arranged. As shown in FIGS. 1 and 3, the positive electrode terminal 20 </ b> A rises upward from the upper surface of the battery body 12, and is bent into an L shape from the upper end of the rising portion 21 </ b> A toward the near side (the left side in the drawing). A flat surface portion 22A and an operation portion 23 that inclines upward at the tip of the flat end portion 22A are provided.

負極端子20Bは、図1および図3に示すように、単電池11の電池本体12の上面から上方に突出する立ち上がり部21Bと、立ち上がり部の上端からL字状に折れ曲がって奥側(図示右側)に向かう平坦面部22Bとを備える。負極端子20Bの平坦面部22Bは、隣り合う単電池11の正極端子20Aと電気的に接続される部分である(接続片部の一例)。   As shown in FIGS. 1 and 3, the negative electrode terminal 20 </ b> B has a rising portion 21 </ b> B that protrudes upward from the upper surface of the battery main body 12 of the unit cell 11, and is bent in an L shape from the upper end of the rising portion and ) Toward the flat surface portion 22B. The flat surface portion 22B of the negative electrode terminal 20B is a portion that is electrically connected to the positive electrode terminal 20A of the adjacent unit cell 11 (an example of a connection piece portion).

負極端子20Bにおいては、平坦面部22Bが、図3に示すように、正極端子20Aの平坦面部22Aの下側に配されるように、折り曲げ位置が設定されている。   In the negative electrode terminal 20B, the bending position is set so that the flat surface portion 22B is disposed below the flat surface portion 22A of the positive electrode terminal 20A as shown in FIG.

電池本体12の上面の負極端子20Bと隣り合う位置には、図1に示すように、絶縁隔壁15が立設されている。この絶縁隔壁15は、負極端子20Bの横幅よりも広く設定され、隣り合う単電池11の異極性の電極端子20A,20B間に導電製材料からなる工具や部材等が落ち込むことによる短絡の発生を防止している。   As shown in FIG. 1, an insulating partition wall 15 is erected at a position adjacent to the negative electrode terminal 20 </ b> B on the upper surface of the battery body 12. The insulating partition 15 is set wider than the lateral width of the negative electrode terminal 20B, and a short circuit caused by a tool or member made of a conductive material falling between the electrode terminals 20A and 20B of different polarities of the adjacent unit cells 11 falls. It is preventing.

正極端子20Aにおける平坦面部22Aには、バネ部材24が取り付けられている。バネ部材24は、図8に示すように、負極端子20Bの平坦面部22Bを受け入れて挟み付ける挟持バネ部25と、FPC30の延出片36(詳細は後述する)を受け入れて挟みつける補助バネ部26と、が一体に設けられた部材である。バネ部材24は、正極端子20Aとは別体の例えばステンレス鋼等のばね性に優れた金属板材をプレス加工することにより形成されている。   A spring member 24 is attached to the flat surface portion 22A of the positive electrode terminal 20A. As shown in FIG. 8, the spring member 24 includes a holding spring portion 25 that receives and holds the flat surface portion 22B of the negative electrode terminal 20B, and an auxiliary spring portion that receives and holds the extending piece 36 (details will be described later) of the FPC 30. 26 is a member provided integrally. The spring member 24 is formed by pressing a metal plate that is separate from the positive electrode terminal 20 </ b> A and has excellent spring properties such as stainless steel.

挟持バネ部25は、金属板材の一端部に板幅方向に延びるスリット25Aを形成して、当該金属板材の他端部がスリット25A側に向かうように回曲させて形成したものである。挟持バネ部25のスリット25Aには、正極端子20Aの操作部23が貫通されており、正極端子20Aの平坦面部22Aと挟持バネ部25のスリット25Aの下側の内周縁との間に、単電池11の並び方向に沿って負極端子20Bの平坦面部22Bを受け入れる挿入口25Bが形成されている。挿入口25Bに負極端子20Bの平坦面部22Bが挿入されると、挟持バネ部25の弾発力により、正極端子20Aの平坦面部22Aが電池本体12側(下側)に押さえつけられ、負極端子20Bの平坦面部22Bの上面に圧接される。   The sandwiching spring portion 25 is formed by forming a slit 25A extending in the width direction of the plate at one end of the metal plate, and turning the other end of the metal plate toward the slit 25A. The operation portion 23 of the positive electrode terminal 20A is penetrated through the slit 25A of the holding spring portion 25, and a single portion is provided between the flat surface portion 22A of the positive electrode terminal 20A and the inner peripheral edge of the lower side of the slit 25A of the holding spring portion 25. An insertion port 25B that receives the flat surface portion 22B of the negative electrode terminal 20B is formed along the direction in which the batteries 11 are arranged. When the flat surface portion 22B of the negative electrode terminal 20B is inserted into the insertion port 25B, the flat surface portion 22A of the positive electrode terminal 20A is pressed against the battery body 12 side (lower side) by the elastic force of the holding spring portion 25, and the negative electrode terminal 20B. Is pressed against the upper surface of the flat surface portion 22B.

補助バネ部26は、図6に示すように、挟持バネ部25の構成を幅方向に小さくしたような構成をなし、具体的には、正極端子20Aの操作部23と並んで設けられた補助操作部27を、補助バネ部26に設けた補助スリット26Aに貫通させてなる。補助バネ部26には、正極端子20Aの補助操作部27と補助スリット26Aの下側の内周縁との間に、FPC30の延出片36を受け入れる延出片挿入口26Bが形成されている。
挟持バネ部25と補助バネ部26とは、延出片挿入口26Bが開くのに連動して挿入口25Bが開くことがないよう、また、逆に挿入口25Bが開くのに連動して延出片挿入口26Bが開くことがないよう、スリット25Aと補助スリット26Aとの間を切り欠くこと(切欠部28)により隔てられている。
As shown in FIG. 6, the auxiliary spring portion 26 has a configuration in which the configuration of the holding spring portion 25 is reduced in the width direction. Specifically, the auxiliary spring portion 26 is provided in parallel with the operation portion 23 of the positive electrode terminal 20A. The operation part 27 is made to penetrate through an auxiliary slit 26 </ b> A provided in the auxiliary spring part 26. In the auxiliary spring portion 26, an extension piece insertion port 26B that receives the extension piece 36 of the FPC 30 is formed between the auxiliary operation portion 27 of the positive electrode terminal 20A and the lower inner periphery of the auxiliary slit 26A.
The sandwiching spring portion 25 and the auxiliary spring portion 26 extend in conjunction with the opening of the extension piece insertion port 26B so that the insertion port 25B does not open. The slit 25A and the auxiliary slit 26A are separated by a notch (notch 28) so that the protruding piece insertion opening 26B does not open.

正負一対の電極端子20の間には、FPC30を載置する合成樹脂製の基板載置部16が上方に突出して設けられている。基板載置部16はFPC30の本体部31が載置される本体載置部16Aと、FPC30の延出片36が載置される延出片載置部16Bとからなる。本体載置部16Aおよび延出片載置部16Bの高さは、補助バネ部26の延出片挿入口26Bの高さと概ね同じ高さとなるように設定されており、FPC30の延出片36を屈曲させずに延出片挿入口26Bに挿入することができるようになっている(図4、図5および図7を参照)。   Between the pair of positive and negative electrode terminals 20, a synthetic resin substrate mounting portion 16 on which the FPC 30 is mounted is provided so as to protrude upward. The substrate platform 16 includes a body platform 16A on which the body 31 of the FPC 30 is mounted, and an extended piece platform 16B on which the extended piece 36 of the FPC 30 is mounted. The height of the main body placing portion 16A and the extending piece placing portion 16B is set to be substantially the same as the height of the extending piece insertion port 26B of the auxiliary spring portion 26, and the extending piece 36 of the FPC 30 is set. Can be inserted into the extended piece insertion opening 26B without bending (see FIGS. 4, 5, and 7).

単電池11Bの基本的な構成は、上述した単電池11Aと同様であり、電池本体12と、正負一対の電極端子20A,20Bとを備える。ただし、単電池11Bと、単電池11Aとでは、各電極端子20A、20Bの平坦面部22A,22BのL字状に折れ曲がる向きが、逆になっている。   The basic configuration of the unit cell 11B is the same as that of the unit cell 11A described above, and includes a battery body 12 and a pair of positive and negative electrode terminals 20A and 20B. However, in the unit cell 11B and the unit cell 11A, the directions in which the flat surface portions 22A and 22B of the electrode terminals 20A and 20B are bent in an L shape are reversed.

隣り合う単電池11Aと単電池11Bの間には、絶縁樹脂製のセパレータ17が配置されている。セパレータ17の略中央部には、図7に示すように、FPC30の導入片33を挿入可能な導入片受入孔18が設けられている。   A separator 17 made of an insulating resin is disposed between the adjacent unit cells 11A and 11B. As shown in FIG. 7, an introduction piece receiving hole 18 into which the introduction piece 33 of the FPC 30 can be inserted is provided at a substantially central portion of the separator 17.

単電池群10に取り付けられているFPC30は、詳細は図示しないが、例えばポリイミドフィルムや液晶状フィルム等からなる絶縁性のベースフィルムの片面または両面にプリント配線技術により複数の導電路32を形成し(図6、図9および図10を参照)、その導電路32の表面を保護フィルム(例えば、ポリイミド製フィルム)で覆った構造とされる。なお、図6及び図10では電圧検知回路を構成する導電路32B(第1導電路ともいう)のみを示しており、図9では温度制御回路を構成する導電路32A(第2導電路の一例)のみを示し、その他の図では導電路32の図示を省略している。   Although the FPC 30 attached to the unit cell group 10 is not shown in detail, a plurality of conductive paths 32 are formed by a printed wiring technique on one or both sides of an insulating base film made of, for example, a polyimide film or a liquid crystal film. (See FIGS. 6, 9, and 10), the surface of the conductive path 32 is covered with a protective film (for example, a polyimide film). 6 and 10 show only a conductive path 32B (also referred to as a first conductive path) constituting the voltage detection circuit, and FIG. 9 shows a conductive path 32A (an example of the second conductive path) constituting the temperature control circuit. In the other drawings, the conductive path 32 is not shown.

FPC30は帯状(長尺状)の本体部31(FPC本体部31という)と、FPC本体部31の幅方向の端部から延出されている複数の延出片36と、FPC本体部31の略中央に設けられている2本の導入片33とを備える。   The FPC 30 includes a strip-shaped (long-shaped) main body 31 (referred to as an FPC main body 31), a plurality of extending pieces 36 extending from the end in the width direction of the FPC main body 31, and the FPC main body 31. And two introduction pieces 33 provided substantially at the center.

FPC本体部31は、図2に示すように、基板載置部16の本体載置部16Aの上に載置され、単電池11の並び方向に沿って配置されている。FPC本体部31には、複数の電圧検知回路用の導電路32Bと、2本の温度制御回路用の導電路32Aとが、単電池11の並び方向に延びて形成されている(図6、図9および図10を参照)。   As shown in FIG. 2, the FPC main body portion 31 is placed on the main body placement portion 16 </ b> A of the substrate placement portion 16 and is disposed along the arrangement direction of the cells 11. A plurality of voltage detection circuit conductive paths 32B and two temperature control circuit conductive paths 32A are formed in the FPC main body 31 so as to extend in the arrangement direction of the cells 11 (FIG. 6, FIG. 6). (See FIGS. 9 and 10).

導入片33は、FPC本体部31の幅方向の略中央部に方形状の切り込みを形成することにより設けられており、長方形状をなしている。2本の導入片33には、それぞれ、第2導電路32Aの一方の端末から連なる導入線部34が設けられている。各導入線部34にはチップタイプのNTCサーミスタ35が実装されている。各導入片33は隣り合う単電池11A,11B間に挿入されるようになっており、本実施形態では8個の単電池11ごとに1本の導入片33が挿入されている。単電池11間に挿入された導入片33はセパレータ17に設けた導入片受入孔18に受け入れられて収容されている(図7を参照)。   The introduction piece 33 is provided by forming a rectangular cut at a substantially central portion in the width direction of the FPC main body 31 and has a rectangular shape. Each of the two introduction pieces 33 is provided with an introduction line portion 34 continuous from one end of the second conductive path 32A. A chip type NTC thermistor 35 is mounted on each lead-in portion 34. Each introduction piece 33 is inserted between adjacent unit cells 11A and 11B. In this embodiment, one introduction piece 33 is inserted for every eight unit cells 11. The introduction piece 33 inserted between the single cells 11 is received and accommodated in the introduction piece receiving hole 18 provided in the separator 17 (see FIG. 7).

第2導電路32Aの他方の端末は、図示しないECUに接続されている。サーミスタ35で得られた温度に関する情報は、導入線部34及び第2導電路32Aを通じてECUに取り込まれ、各単電池11の温度が検知されるようになっている。   The other terminal of the second conductive path 32A is connected to an ECU (not shown). Information on the temperature obtained by the thermistor 35 is taken into the ECU through the lead-in portion 34 and the second conductive path 32A, and the temperature of each unit cell 11 is detected.

ここで、ECUは、マイクロコンピュータ、素子等が搭載されたものであって、単電池11の電圧・電流・温度等の検知、各単電池11の充放電コントロール等を行うための機能を備えた周知の構成のものである。   Here, the ECU is equipped with a microcomputer, an element, and the like, and has functions for detecting the voltage, current, temperature, etc. of the unit cells 11 and controlling charge / discharge of each unit cell 11. It has a known configuration.

さて、延出片36はFPC本体部31の長手方向に沿って延出されており、導入片33よりも短い長方形状をなしている(単電池の並び方向に延びる形状の一例)。延出片36はFPC本体部31の幅方向の2つの端部から、交互に、長手方向においてずらした位置に延出されている。これにより、延出片を1つの端縁から延出する構成とするよりも、材料採りを向上させることができる。延出片36は基板載置部16の延出片載置部16Bに載置される。   Now, the extending piece 36 extends along the longitudinal direction of the FPC main body 31 and has a rectangular shape shorter than the introducing piece 33 (an example of a shape extending in the arrangement direction of the cells). The extending pieces 36 are alternately extended from the two end portions in the width direction of the FPC main body 31 to positions shifted in the longitudinal direction. Thereby, material collection can be improved rather than setting it as the structure which extends an extending piece from one edge. The extension piece 36 is placed on the extension piece placement portion 16 </ b> B of the substrate placement portion 16.

延出片36には、図10に示すように、第1導電路32Bの一方の端末から連なって延出片36の端部に延びる検知用導電路37が形成されており、延出片36における検知用導電路37の端部においては、検知用導電路37を覆うフィルムの除去により、検知用導電路37が露出している。この検知用導電路37の端部の露出部分が電圧検知端子38として機能する。   As shown in FIG. 10, the extension piece 36 is formed with a detection conductive path 37 extending from one end of the first conductive path 32 </ b> B and extending to the end of the extension piece 36. At the end of the detection conductive path 37, the detection conductive path 37 is exposed by removing the film covering the detection conductive path 37. An exposed portion of the end portion of the detection conductive path 37 functions as a voltage detection terminal 38.

延出片36の電圧検知端子38は、正極端子20Aに取り付けられている補助バネ部26に挟みつけられることにより、電気的に接続されている。第1導電路32Bの他方の端末には、例えばECUなどが接続されている。電圧検知端子38で得られた電圧に関する情報は、検知用導電路37及び第1導電路32Bを通じて図示しないECUなどに取り込まれ、各単電池11の電圧が検知されるようになっている。   The voltage detection terminal 38 of the extension piece 36 is electrically connected by being sandwiched between the auxiliary spring portions 26 attached to the positive electrode terminal 20A. For example, an ECU or the like is connected to the other terminal of the first conductive path 32B. Information about the voltage obtained at the voltage detection terminal 38 is taken into an ECU (not shown) through the detection conductive path 37 and the first conductive path 32B, and the voltage of each unit cell 11 is detected.

次に、電池モジュールMの組み付け方法について説明する。
まず、単電池群10とFPC30をそれぞれ作製する。導電路32(第1導電路32B、第2導電路32A)、検知用導電路37、電圧検知端子38、導入線部34、を形成するとともに、複数の延出片36および導入片33を形成した所定形状のFPC30に、サーミスタ35、電子部品などを実装・接続し、本実施形態のFPC30を作製する。
Next, a method for assembling the battery module M will be described.
First, the unit cell group 10 and the FPC 30 are produced. A conductive path 32 (first conductive path 32B, second conductive path 32A), a detection conductive path 37, a voltage detection terminal 38, and an introduction line portion 34 are formed, and a plurality of extending pieces 36 and introduction pieces 33 are formed. The thermistor 35, electronic components, and the like are mounted and connected to the FPC 30 having a predetermined shape, and the FPC 30 of this embodiment is manufactured.

次に、単電池群10の組み付け方法について説明する。単電池群10は、2種類の単電池11(11A,11B)を合計24個用いて、電極端子20A,20Bの極性を交互に逆にした状態で同一平面上に横並びにする。このとき、単電池11Aの電極端子20Aと、単電池11Bの電極端子20Bとが対向する状態となるようにし隣り合う単電池11A,11Bの間にセパレータ17を配置する。   Next, a method for assembling the unit cell group 10 will be described. The unit cell group 10 uses a total of 24 two types of unit cells 11 (11A, 11B), and is arranged side by side on the same plane with the polarities of the electrode terminals 20A, 20B being alternately reversed. At this time, the separator 17 is disposed between the adjacent unit cells 11A and 11B so that the electrode terminal 20A of the unit cell 11A and the electrode terminal 20B of the unit cell 11B face each other.

次に、単電池11Aと単電池11Bとを単電池11の並び方向に近づけると、負極端子20Bの平坦面部22Bと正極端子20Aの挿入口25Bとが対向する位置に配されて、平坦面部22Bは電極端子20Aの操作部23にガイドされて挿入口25Bに誘い込まれる。   Next, when the unit cells 11A and the unit cells 11B are brought close to the arrangement direction of the unit cells 11, the flat surface portion 22B of the negative electrode terminal 20B and the insertion port 25B of the positive electrode terminal 20A are arranged to face each other, and the flat surface portion 22B. Is guided by the operation portion 23 of the electrode terminal 20A and is guided into the insertion port 25B.

さらに、単電池11Aと単電池11Bとを近づけて、平坦面部22Bを挿入口32に挿入すると、バネ部材24が弾性復帰し、負極端子20Bの平坦面部22Bと正極端子20Aの平坦面部22Aとがバネ部材24の弾発力により圧接される(図3を参照)。これにより、正極端子20Aに設けられた挟持バネ部に負極端子20Bの平坦面部22Bが挟み付けられた状態となり、一対の単電池11A,11Bの組み付けが完了する。このような作業を繰り返し、24個の単電池11(11A,11B)を順次組み付けると、単電池群10の組み付けが完了し、各単電池11が導通可能に接続される。   Further, when the unit cell 11A and the unit cell 11B are brought close to each other and the flat surface portion 22B is inserted into the insertion port 32, the spring member 24 is elastically restored, and the flat surface portion 22B of the negative electrode terminal 20B and the flat surface portion 22A of the positive electrode terminal 20A are connected. It is pressed by the elastic force of the spring member 24 (see FIG. 3). Thereby, the flat surface portion 22B of the negative electrode terminal 20B is sandwiched between the clamping spring portions provided in the positive electrode terminal 20A, and the assembly of the pair of unit cells 11A and 11B is completed. When such operations are repeated and 24 unit cells 11 (11A, 11B) are sequentially assembled, assembly of the unit cell group 10 is completed, and each unit cell 11 is connected to be conductive.

次に、単電池群10の上面に、FPC30を上方から組み付ける(図9を参照)。詳細には、図9における左から8個目の単電池11Aと左から9個目の単電池11Bとの間および、図9における右から8個目の単電池11Bと右から9個目の単電池11Aとの間に導入片33を導入すると、導入片33はセパレータ17に形成された導入片受入孔18に受け入れられ、これにより、サーミスタ35の取り付けが完了する。   Next, the FPC 30 is assembled to the upper surface of the unit cell group 10 from above (see FIG. 9). Specifically, the eighth cell 11A from the left and the ninth cell 11B from the left in FIG. 9 and the eighth cell 11B from the right and the ninth cell from the right in FIG. When the introduction piece 33 is introduced between the unit cells 11A, the introduction piece 33 is received in the introduction piece receiving hole 18 formed in the separator 17, and the attachment of the thermistor 35 is thereby completed.

次に、FPC30の各延出片36を、それぞれ、補助バネ部26の延出片挿入口26Bに差し込むと、補助バネ部26が弾性変形して、延出片挿入口26Bが開き、FPC30の延出片36を受け入れ可能となる。さらに、FPC30の延出片36を延出片挿入口26Bに挿入すると、補助バネ部26が弾性復帰し、FPC30の延出片36と正極端子20Aの平坦面部22Aとがバネ部材24の弾発力により圧接される(図5を参照)。これにより、正極端子20Aに設けられた補助バネ部26にFPC30が挟み付けられた状態となり、延出片36に設けた電圧検知端子38と単電池11とが電気的に接続可能となる。FPC30の延出片36を全て補助バネ部26に挟みつけた状態とすると、電池モジュールMが完成する。   Next, when each extending piece 36 of the FPC 30 is inserted into the extending piece insertion port 26B of the auxiliary spring portion 26, the auxiliary spring portion 26 is elastically deformed, the extending piece insertion port 26B is opened, and the FPC 30 The extended piece 36 can be received. Further, when the extended piece 36 of the FPC 30 is inserted into the extended piece insertion port 26B, the auxiliary spring portion 26 is elastically restored, and the extended piece 36 of the FPC 30 and the flat surface portion 22A of the positive electrode terminal 20A are elastically springed. It is pressed by force (see FIG. 5). As a result, the FPC 30 is sandwiched between the auxiliary spring portions 26 provided on the positive electrode terminal 20 </ b> A, and the voltage detection terminal 38 provided on the extension piece 36 and the unit cell 11 can be electrically connected. When all the extending pieces 36 of the FPC 30 are sandwiched between the auxiliary spring portions 26, the battery module M is completed.

本実施形態の作用および効果について説明する。
本実施形態においては、導電路32を形成したFPC本体部31と、導電路32Bの一方の端末から連なる検知用導電路34および電圧検知端子38を有する延出片36と、を一体的に設けたFPC30を、単電池群10に配置して、延出片36を単電池11の電極端子に接続するだけで、単電池群10に電圧検知端子38を接続することができる。したがって、実施形態によれば、簡易な方法により接続可能な電圧検知端子38の接続構造を提供することができる。
The operation and effect of this embodiment will be described.
In the present embodiment, the FPC main body 31 in which the conductive path 32 is formed and the extending piece 36 having the detection conductive path 34 and the voltage detection terminal 38 that are continuous from one end of the conductive path 32B are integrally provided. The voltage detection terminal 38 can be connected to the unit cell group 10 simply by arranging the FPC 30 in the unit cell group 10 and connecting the extension piece 36 to the electrode terminal of the unit cell 11. Therefore, according to the embodiment, it is possible to provide a connection structure of the voltage detection terminal 38 that can be connected by a simple method.

ところで、複数の単電池11を並べてなる電池モジュールMにおいては、単電池11に設定されている製造公差や、充放電による単電池11の膨張収縮によって単電池11の厚みがばらついて電極端子20間のピッチのずれが発生する場合がある。しかしながら、本実施形態によれば、延出片36が単電池11の並び方向に延びる形状をなしているので、電極端子20間のピッチのずれが生じたとしても、延出片36によりずれを吸収することができ、電圧検知端子38と単電池11との電気的な接続を確実なものとすることができる。   By the way, in the battery module M in which the plurality of unit cells 11 are arranged, the thickness of the unit cells 11 varies due to manufacturing tolerances set for the unit cells 11 and expansion / contraction of the unit cells 11 due to charge / discharge. There is a case where a pitch deviation of. However, according to the present embodiment, since the extending piece 36 has a shape extending in the arrangement direction of the unit cells 11, even if a pitch shift between the electrode terminals 20 occurs, the extending piece 36 causes the shift. Therefore, the electrical connection between the voltage detection terminal 38 and the unit cell 11 can be ensured.

また、本実施形態によれば、単電池11には、FPC30の延出片36を載置する延出片載置部16Bが設けられているから、延出片36を延出片載置部16Bに載置することができるので、折れ曲りを防止することができるうえに、延出片36を所定位置に載置することができるので、延出片36の位置決めが容易となる。   Moreover, according to this embodiment, since the cell 11 is provided with the extended piece mounting portion 16B for mounting the extended piece 36 of the FPC 30, the extended piece 36 is used as the extended piece mounting portion. Since it can be placed on 16B, it is possible to prevent bending, and the extension piece 36 can be placed at a predetermined position, so that the extension piece 36 can be easily positioned.

また、本実施形態において、正極端子20Aおよび負極端子20Bは、電池本体12から突出形成されるとともに、単電池11の並び方向に撓み変形可能な金属板材から形成され、負極端子20Bの先端には、隣り合う単電池11の正極端子20Aに接触可能な平坦面部22B(接続片部)が設けられる一方、正極端子20Aには平坦面部22Bを受け入れて挟みつけるとともに、FPC30の延出片36を受け入れて挟みつけるバネ部材24が設けられ、延出片36をバネ部材24に挟持させることで、電圧検知端子38が電極端子20と接続される構成となっている。その結果、本実施形態によれば、単電池11間の接続にバスバーなどの接続部材が不要となり、そのうえ、FPC30の延出片36を、正極端子20Aに設けたバネ部材24に挟持させるだけで、電圧検知端子38と電極端子20とが接続されるので、部品点数を減らすことができるとともに作業効率に優れる。   Further, in the present embodiment, the positive electrode terminal 20A and the negative electrode terminal 20B are formed to protrude from the battery body 12, and are formed from a metal plate material that can be bent and deformed in the arrangement direction of the single cells 11, and at the tip of the negative electrode terminal 20B The flat surface portion 22B (connection piece portion) that can contact the positive electrode terminal 20A of the adjacent unit cell 11 is provided, while the flat surface portion 22B is received and sandwiched between the positive electrode terminal 20A and the extension piece 36 of the FPC 30 is received. The spring member 24 is provided so as to be sandwiched between the voltage detection terminal 38 and the electrode member 20 by connecting the extension piece 36 to the spring member 24. As a result, according to the present embodiment, a connection member such as a bus bar is not necessary for connection between the single cells 11, and furthermore, the extending piece 36 of the FPC 30 is simply sandwiched between the spring members 24 provided on the positive electrode terminal 20 </ b> A. Since the voltage detection terminal 38 and the electrode terminal 20 are connected, the number of parts can be reduced and the working efficiency is excellent.

特に、本実施形態では、バネ部材24には、平坦面部22Bを挟持する挟持バネ部25と、延出片36を挟持する補助バネ部26とが一体的に設けられているから、さらに部品点数を減らすことができる。   In particular, in the present embodiment, the spring member 24 is integrally provided with a sandwiching spring portion 25 that sandwiches the flat surface portion 22B and an auxiliary spring portion 26 that sandwiches the extending piece 36. Can be reduced.

さらに、本実施形態によれば、補助バネ部26には、延出片36を単電池11の並び方向に沿って挿入可能な延出片挿入口26Bが形成されているから、延出片36を延出片挿入口26Bに挿入して補助バネ部26に挟持させるだけで、電圧検知端子38と電極端子20とを接続することができるので、作業効率が向上する。   Furthermore, according to the present embodiment, the extension piece 36 is formed in the auxiliary spring portion 26 since the extension piece insertion port 26B into which the extension piece 36 can be inserted along the arrangement direction of the cells 11 is formed. Since the voltage detection terminal 38 and the electrode terminal 20 can be connected simply by inserting the A into the extension piece insertion port 26B and sandwiching it between the auxiliary spring portions 26, the working efficiency is improved.

加えて、本実施形態においては、FPC30には、隣り合う単電池11の間に導入される導入片33がFPC本体部31と一体的に設けられるとともに、FPC本体部31には、第1導電路32B以外の第2導電路32Aが形成され、導入片33には、第2導電路32Aの一方の端末から連なる導入線部34と、導入線部34に実装されたサーミスタ35とが設けられ、導入片33を隣り合う単電池11の間に挿入することにより、サーミスタ35が単電池群10に取り付けられるようになっている。その結果、本実施形態によれば、1つのFPC30を単電池群10に取り付けるだけで、電圧検知回路と温度制御用の回路の双方を接続することができるので、接続作業を簡素化できるうえに、部品点数を少なくすることもできる。   In addition, in the present embodiment, the FPC 30 is provided with an introduction piece 33 that is introduced between the adjacent single cells 11 integrally with the FPC main body 31, and the FPC main body 31 has a first conductive material. A second conductive path 32A other than the path 32B is formed, and the introduction piece 33 is provided with an introduction line portion 34 continuous from one end of the second conduction path 32A and a thermistor 35 mounted on the introduction line portion 34. The thermistor 35 is attached to the unit cell group 10 by inserting the introduction piece 33 between the adjacent unit cells 11. As a result, according to the present embodiment, it is possible to connect both the voltage detection circuit and the temperature control circuit simply by attaching one FPC 30 to the single cell group 10, and thus the connection work can be simplified. The number of parts can be reduced.

<他の実施形態>
本発明は上記記述及び図面によって説明した実施形態に限定されるものではなく、例えば次のような実施形態も本発明の技術的範囲に含まれる。
(1)上記実施形態では、延出片載置部16Bを備える単電池11を示したが、延出片載置部16Bを備えないものであってもよい。
(2)上記実施形態では、バスバーなどの接続部材を用いずに電極端子20同士を直接接続するタイプの単電池11を示したが、本発明は、これに限定されない。例えばボルト状の電極端子を有する単電池の電極端子に、FPCの延出片に設けた電圧検知端子を挿通させて、接続してもよい。
(3)上記実施形態では、挟持バネ部25と補助バネ部26とが一体になったバネ部材24を備えるものを示したが、挟持バネ部と補助バネ部とは別体であってもよい。
(4)上記実施形態では、補助バネ部26に延出片挿入口26Bが形成されているものを示したが、挟持バネ部に延出片と接続片部とをともに挿通可能な挿通口を設けてもよい。
(5)上記実施形態では単電池11間にセパレータ17が配される構成のものを示したが、セパレータを備えないものであってもよい。
(6)上記実施形態では、電圧検知回路と温度制御回路とを備えるFPC30を示したが、電圧検知回路のみを備えるFPCであってもよい。
(7)上記実施形態では、電圧検知端子を検知用導電路37の端部において、検知用導電路37を露出させることにより設けたが、検知用導電路の端部に導電性の金具を接続して電圧検知端子を構成してもよい。
<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.
(1) In the above embodiment, the unit cell 11 including the extended piece placement portion 16B is shown, but the extended piece placement portion 16B may not be provided.
(2) In the above embodiment, the unit cell 11 in which the electrode terminals 20 are directly connected to each other without using a connection member such as a bus bar is shown, but the present invention is not limited to this. For example, the voltage detection terminal provided in the extension piece of FPC may be inserted and connected to the electrode terminal of the unit cell which has a bolt-shaped electrode terminal.
(3) In the above embodiment, the sandwiching spring portion 25 and the auxiliary spring portion 26 are provided with the spring member 24 integrated. However, the sandwiching spring portion and the auxiliary spring portion may be separate. .
(4) In the above embodiment, the auxiliary spring portion 26 is formed with the extension piece insertion port 26B. However, the insertion spring port has an insertion port through which both the extension piece and the connection piece portion can be inserted. It may be provided.
(5) Although the said embodiment showed the thing of the structure by which the separator 17 is distribute | arranged between the single cells 11, you may not provide a separator.
(6) Although the FPC 30 including the voltage detection circuit and the temperature control circuit is shown in the above embodiment, the FPC including only the voltage detection circuit may be used.
(7) In the above embodiment, the voltage detection terminal is provided at the end of the detection conductive path 37 by exposing the detection conductive path 37. However, a conductive metal fitting is connected to the end of the detection conductive path. Thus, a voltage detection terminal may be configured.

M…電池モジュール
10…単電池群
11…単電池
11A…単電池
11B…単電池
12…電池本体
16…基板載置部
16A…本体載置部
16B…延出片載置部
20…電極端子
20A…正極の電極端子(正極端子)
20B…負極の電極端子(負極端子)
22A…(正極端子側の)平坦面部
22B…(負極端子側の)平坦面部(接続片部)
24…バネ部材
25…挟持バネ部
25B…挿入口
26…補助バネ部
26B…延出片挿入口
30…FPC(フレキシブルプリント基板)
31…FPC本体部(本体部)
32…導電路
32A…温度制御回路用の導電路(第2導電路)
32B…(電圧検知回路用の)導電路(第1導電路)
33…導入片
34…導入線部
35…サーミスタ
36…延出片
37…検知用導電路
38…電圧検知端子
M ... Battery module 10 ... Single cell group 11 ... Single cell 11A ... Single cell 11B ... Single cell 12 ... Battery body 16 ... Substrate placing part 16A ... Main body placing part 16B ... Extending piece placing part 20 ... Electrode terminal 20A ... Positive electrode terminal (positive terminal)
20B ... Negative electrode terminal (negative electrode terminal)
22A ... Flat surface portion (on the positive electrode terminal side) 22B ... Flat surface portion (on the negative electrode terminal side) (connection piece portion)
24 ... Spring member 25 ... Holding spring part 25B ... Insertion port 26 ... Auxiliary spring part 26B ... Extension piece insertion port 30 ... FPC (flexible printed circuit board)
31 ... FPC main unit (main unit)
32 ... conductive path 32A ... conductive path for temperature control circuit (second conductive path)
32B ... Conductive path (for voltage detection circuit) (first conductive path)
33 ... Introduction piece 34 ... Introduction wire portion 35 ... Thermistor 36 ... Extension piece 37 ... Detection conductive path 38 ... Voltage detection terminal

Claims (6)

正極および負極の電極端子を有する複数の単電池を並べて接続してなる単電池群の、前記電極端子に接続されて前記単電池の電圧を検知する電圧検知端子の接続構造であって、
前記単電池群には、前記単電池の並び方向に沿って配置されるとともに、前記単電池の並び方向に延びて配される導電路が形成された本体部を有するフレキシブルプリント基板が配され、
前記フレキシブルプリント基板には、前記電圧検知端子と、前記導電路の一方の端末から連なり前記電圧検知端子に接続される検知用導電路とを有するとともに、前記本体部から一体的に延出された延出片が設けられ、
前記延出片は、前記単電池の並び方向に延びる形状をなすとともに、前記電圧検知端子が前記電極端子と電気的に接続されていることを特徴とする電圧検知端子の接続構造。
A connection structure of a voltage detection terminal for detecting a voltage of the unit cell connected to the electrode terminal of a unit cell group formed by connecting a plurality of unit cells having a positive electrode and a negative electrode terminal,
In the unit cell group, a flexible printed circuit board having a main body formed with a conductive path arranged along the arrangement direction of the unit cells and extending in the arrangement direction of the unit cells is arranged,
The flexible printed circuit board has the voltage detection terminal and a detection conductive path connected to the voltage detection terminal from one end of the conductive path, and is integrally extended from the main body. An extension piece is provided,
The extension piece has a shape extending in the arrangement direction of the cells, and the voltage detection terminal is electrically connected to the electrode terminal.
前記単電池には、前記フレキシブルプリント基板の前記延出片を載置する延出片載置部が設けられていることを特徴とする請求項1に記載の電圧検知端子の取付構造。 2. The voltage detection terminal mounting structure according to claim 1, wherein the unit cell is provided with an extension piece placement portion on which the extension piece of the flexible printed board is placed. 前記正極および負極の電極端子は、電池本体から突出形成されるとともに、前記単電池の並び方向に撓み変形可能な金属板材から形成され、
一方の極性の前記電極端子の先端には、隣り合う前記単電池の他方の極性の前記電極端子に接触可能な接続片部が設けられる一方、前記他方の極性の電極端子には前記接続片部を受け入れて挟みつけるとともに、前記フレキシブルプリント基板の前記延出片を受け入れて挟みつけるバネ部材が設けられ、
前記フレキシブルプリント基板の前記延出片を前記バネ部材に挟持させることで、前記電圧検知端子が前記電極端子と接続されることを特徴とする請求項1に記載の電圧検知端子の接続構造。
The positive electrode and negative electrode terminals are formed from a metal plate that protrudes from the battery body and can be bent and deformed in the direction in which the cells are arranged.
One end of the electrode terminal of one polarity is provided with a connection piece portion that can contact the electrode terminal of the other polarity of the adjacent unit cell, while the connection piece portion is provided on the electrode terminal of the other polarity. And a spring member for receiving and sandwiching the extended piece of the flexible printed circuit board is provided,
The voltage detection terminal connection structure according to claim 1, wherein the voltage detection terminal is connected to the electrode terminal by sandwiching the extended piece of the flexible printed board between the spring members.
前記バネ部材には、前記接続片部を挟持する挟持バネ部と、前記延出片を挟持する補助バネ部とが一体的に設けられていることを特徴とする請求項3に記載の電圧検知端子の接続構造。 The voltage detection according to claim 3, wherein the spring member is integrally provided with a holding spring portion that holds the connection piece portion and an auxiliary spring portion that holds the extension piece. Terminal connection structure. 前記補助バネ部には、前記延出片を前記単電池の並び方向に沿って挿入可能な延出片挿入口が形成されていることを特徴とする請求項4に記載の電圧検知端子の接続構造。 5. The connection of the voltage detection terminal according to claim 4, wherein the auxiliary spring portion is formed with an extension piece insertion port into which the extension piece can be inserted along the cell arrangement direction. Construction. 前記フレキシブルプリント基板には、隣り合う前記単電池の間に導入される導入片が前記本体部と一体的に設けられるとともに、前記本体部には、前記検知用導電路に接続される導電路以外の第2導電路が前記単電池の並び方向に延びて形成され、
前記導入片には、前記第2導電路の一方の端末から連なる導入線部と、前記導入線部に実装されたサーミスタとが設けられ、前記導入片を隣り合う前記単電池の間に挿入することにより、前記サーミスタが前記単電池群に取り付けられるようになっていることを特徴とする請求項1ないし請求項5のいずれか一項に記載の電圧検知端子の接続構造。
In the flexible printed circuit board, an introduction piece introduced between the adjacent unit cells is provided integrally with the main body portion, and the main body portion has a conductive path other than the conductive path connected to the detection conductive path. A second conductive path is formed extending in the direction in which the unit cells are arranged,
The introduction piece is provided with an introduction line portion continuous from one end of the second conductive path and a thermistor mounted on the introduction line portion, and the introduction piece is inserted between the adjacent unit cells. The connection structure of the voltage detection terminal as described in any one of Claims 1 thru | or 5 by which the said thermistor is attached to the said cell group.
JP2011240198A 2011-11-01 2011-11-01 Connection structure of voltage detection terminal Pending JP2013098032A (en)

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CN107403969A (en) * 2016-05-20 2017-11-28 莫列斯有限公司 Cell apparatus and battery connection module
CN110034265A (en) * 2019-04-22 2019-07-19 置富电子技术(东莞)有限公司 With the soft-package battery mould group of no-welding type electrode tab connection structure and connection method
CN110620409A (en) * 2018-06-20 2019-12-27 株式会社电装 Monitoring device
CN110651378A (en) * 2017-06-02 2020-01-03 株式会社自动网络技术研究所 Electricity storage module
JP2020514976A (en) * 2016-12-27 2020-05-21 ユラ・コーポレイション・カンパニー・リミテッドYura Corporation Co., Ltd. Flexible circuit board and frame assembly including the same
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WO2022158855A1 (en) * 2021-01-22 2022-07-28 주식회사 엘지에너지솔루션 Battery cell, battery module, and battery pack including same
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US9425518B2 (en) 2013-03-15 2016-08-23 Yazaki Corporation Connection structure of conductor and flat cable, and power supply device using the connection structure
WO2014142156A1 (en) * 2013-03-15 2014-09-18 矢崎総業株式会社 Connection structure of conductor and flat cable, and power source used in said connection structure
WO2016042848A1 (en) * 2014-09-19 2016-03-24 株式会社豊田自動織機 Battery module
JP2016062800A (en) * 2014-09-19 2016-04-25 株式会社豊田自動織機 Battery module
WO2016084273A1 (en) * 2014-11-28 2016-06-02 三洋電機株式会社 Power source device
JP2017168256A (en) * 2016-03-15 2017-09-21 株式会社豊田自動織機 Battery module
WO2017158915A1 (en) * 2016-03-15 2017-09-21 株式会社豊田自動織機 Battery module
CN107403969B (en) * 2016-05-20 2019-08-06 莫列斯有限公司 Cell apparatus and battery connection module
CN107403969A (en) * 2016-05-20 2017-11-28 莫列斯有限公司 Cell apparatus and battery connection module
US11309593B2 (en) 2016-12-27 2022-04-19 Yura Corporation Co., Ltd. Flexible circuit board and frame assembly including same
JP2020514976A (en) * 2016-12-27 2020-05-21 ユラ・コーポレイション・カンパニー・リミテッドYura Corporation Co., Ltd. Flexible circuit board and frame assembly including the same
CN110651378A (en) * 2017-06-02 2020-01-03 株式会社自动网络技术研究所 Electricity storage module
CN110651378B (en) * 2017-06-02 2022-04-26 株式会社自动网络技术研究所 Electricity storage module
CN110620409A (en) * 2018-06-20 2019-12-27 株式会社电装 Monitoring device
CN110034265A (en) * 2019-04-22 2019-07-19 置富电子技术(东莞)有限公司 With the soft-package battery mould group of no-welding type electrode tab connection structure and connection method
WO2020246111A1 (en) * 2019-06-07 2020-12-10 日本メクトロン株式会社 Wiring material and battery module
JP2020202060A (en) * 2019-06-07 2020-12-17 日本メクトロン株式会社 Wiring material and battery module
JP7403240B2 (en) 2019-06-07 2023-12-22 日本メクトロン株式会社 Wiring materials and battery modules
US12080910B2 (en) 2019-06-07 2024-09-03 Nippon Mektron, Ltd. Wiring material and battery module
WO2022158855A1 (en) * 2021-01-22 2022-07-28 주식회사 엘지에너지솔루션 Battery cell, battery module, and battery pack including same
CN117471290A (en) * 2023-12-25 2024-01-30 厦门市工科自动化设备有限公司 Blade battery FPC's check out test set
CN117471290B (en) * 2023-12-25 2024-04-09 厦门市工科自动化设备有限公司 Blade battery FPC's check out test set

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