JP2008226519A - Battery pack - Google Patents

Battery pack Download PDF

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Publication number
JP2008226519A
JP2008226519A JP2007059523A JP2007059523A JP2008226519A JP 2008226519 A JP2008226519 A JP 2008226519A JP 2007059523 A JP2007059523 A JP 2007059523A JP 2007059523 A JP2007059523 A JP 2007059523A JP 2008226519 A JP2008226519 A JP 2008226519A
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Japan
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electrode terminal
battery pack
cell
cells
negative electrode
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Pending
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JP2007059523A
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Japanese (ja)
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Masayuki Hoshino
昌幸 星野
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Toshiba Corp
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Toshiba Corp
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Priority to JP2007059523A priority Critical patent/JP2008226519A/en
Publication of JP2008226519A publication Critical patent/JP2008226519A/en
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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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  • Gas Exhaust Devices For Batteries (AREA)
  • Battery Mounting, Suspending (AREA)
  • Connection Of Batteries Or Terminals (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a battery pack for a large current with connection resistance and connection man-hour reduced. <P>SOLUTION: A plurality of cells 11 are prepared, each arranging a cathode terminal 12 and an anode terminal 13 on one face, of a battery pack 10 having the plurality of cells 11 connected in series, arrayed so that each face on which the cathode terminal 12 and the anode terminal 13 are arranged is opposed to the other, and the cathode terminal 12 of one of the cells 11 is connected with the anode terminal 13 of the other cell 11. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、複数個の角型セルが直列接続されるバッテリパックに関する。   The present invention relates to a battery pack in which a plurality of square cells are connected in series.

一般に、複数個の角型セルを用いたバッテリパックにおいては、セルの端子を接続導体で接続している。図４は従来の複数個の角型セルを用いたバッテリパックの斜視図である。バッテリパック１０を形成する各々のセル１１は正極端子１２及び負極端子１３を同じ面に有し、正極端子１２及び負極端子１３を有した面を同じ方向にして複数個のセル１１を並べて配置し、隣り合うセル１１の正極端子１２と負極端子１３とを接続導体１４で接続して直列接続するようにしている。   In general, in a battery pack using a plurality of square cells, the cell terminals are connected by connecting conductors. FIG. 4 is a perspective view of a conventional battery pack using a plurality of square cells. Each cell 11 forming the battery pack 10 has a positive electrode terminal 12 and a negative electrode terminal 13 on the same surface, and a plurality of cells 11 are arranged side by side with the surfaces having the positive electrode terminal 12 and the negative electrode terminal 13 in the same direction. The positive electrode terminal 12 and the negative electrode terminal 13 of the adjacent cells 11 are connected by a connection conductor 14 so as to be connected in series.

大電流を出力するバッテリパック１０においては、接続導体１４の抵抗値を小さくするため接続導体１４の断面積を大きくし、接続導体１４と正極端子１２や負極端子１３との接続抵抗を下げるために溶接によって接合している。   In the battery pack 10 that outputs a large current, in order to reduce the resistance value of the connection conductor 14, the cross-sectional area of the connection conductor 14 is increased, and the connection resistance between the connection conductor 14 and the positive electrode terminal 12 or the negative electrode terminal 13 is decreased. They are joined by welding.

複数個の角型のバッテリモジュールを積層して構成され略直方体の形状を有したバッテリパックとしては、略直方体の最も短い辺が鉛直下方に向くように搭載されたものがある（例えば、特許文献１参照）。
特開２００４−３１１１４２号公報 As a battery pack configured by stacking a plurality of rectangular battery modules and having a substantially rectangular parallelepiped shape, there is a battery pack mounted such that the shortest side of the substantially rectangular parallelepiped is directed vertically downward (for example, Patent Documents). 1).
Japanese Patent Application Laid-Open No. 2004-311142

しかし、従来のバッテリパックにおいては、２つのセルを接続するために接続導体１４を用いて正極端子１２と負極端子１３とを接続しているので、接続導体１４が必要となる。また、その接続導体１４で隣り合うセル１１の正極端子１２と負極端子１３とを接続するので接続箇所が２箇所となる。また、その接続は溶接などで接合することになるので、接続導体１４分の重量増加や２つのセル１１間の接合に２箇所の溶接が必要となり作業が煩雑となる。   However, in the conventional battery pack, since the positive electrode terminal 12 and the negative electrode terminal 13 are connected using the connection conductor 14 in order to connect two cells, the connection conductor 14 is required. Further, since the positive electrode terminal 12 and the negative electrode terminal 13 of the adjacent cells 11 are connected by the connection conductor 14, there are two connection points. Further, since the connection is performed by welding or the like, the weight of the connection conductor is increased by 14 minutes, and welding at two locations is required for the connection between the two cells 11, and the work becomes complicated.

本発明の目的は、上述した課題を解決するためになされたものであり、接続抵抗及び接続工数を低減した大電流用のバッテリパックを得ることである。   An object of the present invention is to solve the above-described problems, and is to obtain a battery pack for large current with reduced connection resistance and connection man-hours.

本発明に係わるバッテリパックは、複数個のセルが直列接続されるバッテリパックにおいて、正極端子と負極端子とを１つの面に配置した複数個のセルを用意し、正極端子及び負極端子が配置された面が対面するように複数個のセルを配置し、一方のセルの正極端子と他方のセルの負極端子とを接続したことを特徴とする。   The battery pack according to the present invention is a battery pack in which a plurality of cells are connected in series, and a plurality of cells having a positive electrode terminal and a negative electrode terminal arranged on one surface are prepared, and the positive electrode terminal and the negative electrode terminal are arranged. A plurality of cells are arranged so that the opposite surfaces face each other, and a positive electrode terminal of one cell and a negative electrode terminal of the other cell are connected.

本発明によれば、接続抵抗及び接続工数を低減した大電流用のバッテリパックを得ることができる。   According to the present invention, a battery pack for large current with reduced connection resistance and connection man-hour can be obtained.

図１は本発明の実施の形態に係わるバッテリパックの一例を示す斜視図である。バッテリパック１０のセル１１は一方向の端面に正極端子１２と負極端子１３とを並べて配置している。そして、セル１１の正極端子１２及び負極端子１３が配置された面同士が向かい合うようにセル１１を配置し、向かい合った一方のセル１１の正極端子１２と他方のセル１１の負極端子１３とをレーザー溶接などの溶接によって接続する。このような接続を複数繰り返すことによって、出力電圧に必要な個数のセルを直列に接続している。   FIG. 1 is a perspective view showing an example of a battery pack according to an embodiment of the present invention. The cell 11 of the battery pack 10 has a positive terminal 12 and a negative terminal 13 arranged side by side on one end face. Then, the cells 11 are arranged so that the surfaces of the cells 11 on which the positive electrode terminal 12 and the negative electrode terminal 13 are arranged face each other. Connect by welding. By repeating such a connection a plurality of times, the required number of cells for the output voltage are connected in series.

また、各セル１１の安全弁１５は、正極端子１２及び負極端子１３が配置された面の反対側の面に配置する。これによって、セル１１の接続部を絶縁樹脂などでモールドすることが可能となり、安全弁１５からガスが放出された場合であってもセル１１の正極端子１２及び負極端子１３の接続部にガスが掛からない構成としている。   Moreover, the safety valve 15 of each cell 11 is arrange | positioned on the surface on the opposite side to the surface where the positive electrode terminal 12 and the negative electrode terminal 13 are arrange | positioned. As a result, the connection part of the cell 11 can be molded with an insulating resin or the like, and even when the gas is released from the safety valve 15, the gas is applied to the connection part of the positive electrode terminal 12 and the negative electrode terminal 13 of the cell 11. It has no configuration.

また、セル１１の正極端子１２及び負極端子１３の配置は、図２（ａ）に示すように、セル１１の縁から正極端子１２または負極端子１３の中心までの距離ｄ１がセル１１の幅Ｗの約１／４以下となるように配置する。これにより、図１に示すように複数個のセル１１を密着して配置することができる。実際には、セル幅の１／４より公差分だけ短くすることになる。   Further, the arrangement of the positive electrode terminal 12 and the negative electrode terminal 13 of the cell 11 is such that the distance d1 from the edge of the cell 11 to the center of the positive electrode terminal 12 or the negative electrode terminal 13 is the width W of the cell 11 as shown in FIG. It arrange | positions so that it may become about 1/4 or less. Thereby, as shown in FIG. 1, the some cell 11 can be closely_contact | adhered and arrange | positioned. Actually, the tolerance is shorter than 1/4 of the cell width.

また、隣り合うセル１１間に冷却のための隙間が必要な場合には、図２（ｂ）に示すように、セル１１の縁から正極端子１２または負極端子１３の中心までの距離ｄ２を短くする。これにより冷却のために必要な隣り合うセル１１間の隙間を確保する。つまり、その隙間の１／２だけ、セル幅Ｗの約１／４より短い位置に正極端子１２または負極端子１３を配置する。   When a gap for cooling is required between the adjacent cells 11, the distance d2 from the edge of the cell 11 to the center of the positive terminal 12 or the negative terminal 13 is shortened as shown in FIG. To do. Thereby, the clearance gap between the adjacent cells 11 required for cooling is ensured. That is, the positive electrode terminal 12 or the negative electrode terminal 13 is disposed at a position shorter than about 1/4 of the cell width W by 1/2 of the gap.

図３は、本発明の実施の形態に係わるバッテリパックの他の一例を示す斜視図である。図３に示すように、セル１１の厚さＡをセル幅Ｗの約１／２とすることにより、図３の右側に示すようにセル１１の厚さＡ方向に対してもセル１１を直列に接続して配置することができる。   FIG. 3 is a perspective view showing another example of the battery pack according to the embodiment of the present invention. As shown in FIG. 3, by setting the thickness A of the cell 11 to about ½ of the cell width W, the cell 11 is also connected in series with respect to the thickness A direction of the cell 11 as shown on the right side of FIG. Can be placed in connection.

本発明の実施の形態によれば、セル１１の正極端子１２や負極端子１３を直接溶接することができるため、セル１１の正極端子１２や負極端子１３を接続する接続導体１４が不要となる。また、２つのセル１１を直列に接続するために、１箇所の溶接でよいため、接続箇所が減少した分と接続導体１４の抵抗分の抵抗を少なくすることができる。また、複数のセル１１の接続点が直線状に並ぶため、レーザー溶接を効率的に行うことができる。   According to the embodiment of the present invention, since the positive electrode terminal 12 and the negative electrode terminal 13 of the cell 11 can be directly welded, the connection conductor 14 for connecting the positive electrode terminal 12 and the negative electrode terminal 13 of the cell 11 becomes unnecessary. Further, since the two cells 11 are connected in series, welding at one place is sufficient, so that the resistance corresponding to the reduction of the connection places and the resistance of the connection conductor 14 can be reduced. In addition, since the connection points of the plurality of cells 11 are arranged in a straight line, laser welding can be performed efficiently.

本発明の実施の形態に係わるバッテリパックの一例を示す斜視図。The perspective view which shows an example of the battery pack concerning embodiment of this invention. 本発明の実施の形態におけるセルの正極端子及び負極端子の配置の説明図。Explanatory drawing of arrangement | positioning of the positive electrode terminal and negative electrode terminal of a cell in embodiment of this invention. 本発明の実施の形態に係わるバッテリパックの他の一例を示す斜視図。The perspective view which shows another example of the battery pack concerning embodiment of this invention. 従来の複数個の角型セルを用いたバッテリパックの斜視図。The perspective view of the battery pack using the conventional some square cell.

符号の説明Explanation of symbols

１０…バッテリパック、１１…セル、１２…正極端子、１３…負極端子、１４…接続導体、１５…安全弁 DESCRIPTION OF SYMBOLS 10 ... Battery pack, 11 ... Cell, 12 ... Positive electrode terminal, 13 ... Negative electrode terminal, 14 ... Connection conductor, 15 ... Safety valve

Claims (5)

複数個のセルが直列接続されるバッテリパックにおいて、正極端子と負極端子とを１つの面に配置した複数個のセルを用意し、正極端子及び負極端子が配置された面が対面するように複数個のセルを配置し、一方のセルの正極端子と他方のセルの負極端子とを接続したことを特徴とするバッテリパック。 In a battery pack in which a plurality of cells are connected in series, a plurality of cells in which a positive electrode terminal and a negative electrode terminal are arranged on one surface are prepared, and a plurality of cells are arranged so that the surfaces on which the positive electrode terminal and the negative electrode terminal are arranged face each other. A battery pack in which a plurality of cells are arranged and a positive electrode terminal of one cell is connected to a negative electrode terminal of the other cell. 前記セルの縁から正極端子または負極端子の中心までの距離は、正極端子または負極端子が配置された面の幅の１／４以下であることを特徴とする請求項１に記載のバッテリパック。 2. The battery pack according to claim 1, wherein the distance from the edge of the cell to the center of the positive electrode terminal or the negative electrode terminal is ¼ or less of the width of the surface on which the positive electrode terminal or the negative electrode terminal is arranged. 前記セルの厚さは前記セルの幅の約１／２であることを特徴とする請求項１または請求項２のいずれか１項に記載のバッテリパック。 The battery pack according to claim 1, wherein the thickness of the cell is about ½ of the width of the cell. 前記正極端子及び前記負極端子の接続は、レーザー溶接で接続されたことを特徴とする請求項１ないし３のいずれか１項に記載のバッテリパック The battery pack according to any one of claims 1 to 3, wherein the positive electrode terminal and the negative electrode terminal are connected by laser welding. 前記セルの安全弁は、前記正極端子及び前記負極端子の配置された面の反対側に設置されていることを特徴とする請求項１ないし４のいずれか１項に記載のバッテリパック。 The battery pack according to any one of claims 1 to 4, wherein the safety valve of the cell is installed on a side opposite to a surface on which the positive electrode terminal and the negative electrode terminal are arranged.
JP2007059523A 2007-03-09 2007-03-09 Battery pack Pending JP2008226519A (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010080411A (en) * 2008-09-29 2010-04-08 Beans You Inc Battery and connection method of the battery
WO2011067025A1 (en) 2009-12-04 2011-06-09 Robert Bosch Gmbh Method for producing an electrically conductive connection
WO2011113633A1 (en) 2010-03-17 2011-09-22 Robert Bosch Gmbh Battery contact via adapted two-component connecting elements
JP2011216858A (en) * 2010-03-15 2011-10-27 Seiko Instruments Inc Electrochemical cell with terminals, and manufacturing method thereof
JP2011216466A (en) * 2010-03-15 2011-10-27 Seiko Instruments Inc Electrochemical cell with terminal and method for manufacturing the same
US9653714B2 (en) 2013-03-27 2017-05-16 Gs Yuasa International Ltd. Electric storage device and electric storage apparatus

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010080411A (en) * 2008-09-29 2010-04-08 Beans You Inc Battery and connection method of the battery
JP4659079B2 (en) * 2008-09-29 2011-03-30 ビーンズユー株式会社 Battery and battery connection method
WO2011067025A1 (en) 2009-12-04 2011-06-09 Robert Bosch Gmbh Method for producing an electrically conductive connection
DE102009047490A1 (en) 2009-12-04 2011-06-09 Robert Bosch Gmbh Process for the preparation of an electrically conductive compound
JP2011216858A (en) * 2010-03-15 2011-10-27 Seiko Instruments Inc Electrochemical cell with terminals, and manufacturing method thereof
JP2011216466A (en) * 2010-03-15 2011-10-27 Seiko Instruments Inc Electrochemical cell with terminal and method for manufacturing the same
WO2011113633A1 (en) 2010-03-17 2011-09-22 Robert Bosch Gmbh Battery contact via adapted two-component connecting elements
DE102010002938A1 (en) 2010-03-17 2011-09-22 Robert Bosch Gmbh Battery contacting via adapted binary compounds
US9653714B2 (en) 2013-03-27 2017-05-16 Gs Yuasa International Ltd. Electric storage device and electric storage apparatus

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