JP2010097769A - Battery terminal, secondary battery, method for manufacturing battery terminal, and method for manufacturing secondary battery - Google Patents

Battery terminal, secondary battery, method for manufacturing battery terminal, and method for manufacturing secondary battery Download PDF

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JP2010097769A
JP2010097769A JP2008266571A JP2008266571A JP2010097769A JP 2010097769 A JP2010097769 A JP 2010097769A JP 2008266571 A JP2008266571 A JP 2008266571A JP 2008266571 A JP2008266571 A JP 2008266571A JP 2010097769 A JP2010097769 A JP 2010097769A
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terminal
battery
manufacturing
positive electrode
battery terminal
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Masazumi Oishi
正純 大石
Katsuo Hashizaki
克雄 橋▲崎▼
Kazuyuki Adachi
和之 足立
Shinji Murakami
慎治 村上
Yoshihiro Wada
好広 和田
Hiroyuki Shibata
裕之 柴田
Koji Kurayama
功治 倉山
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Kyushu Electric Power Co Inc
Mitsubishi Heavy Industries Ltd
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Kyushu Electric Power Co Inc
Mitsubishi Heavy Industries 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
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

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  • Sealing Battery Cases Or Jackets (AREA)
  • Secondary Cells (AREA)
  • Connection Of Batteries Or Terminals (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a battery terminal capable of strongly connecting to a bus bar. <P>SOLUTION: The battery terminal includes a first columnar terminal member 10, a second columnar terminal member 12 joining with the first terminal member 10, and a flange part 12a projecting from the side surface of at least one of the first terminal member 10 and the second terminal member 12 to the outside. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は二次電池に関し、特に電池端子、電池端子の製造方法及び二次電池の製造方法に関する。   The present invention relates to a secondary battery, and more particularly to a battery terminal, a battery terminal manufacturing method, and a secondary battery manufacturing method.

二次電池の電池端子は、電池の化学反応への適合性や、接触抵抗を低減させることを考慮して材料や構造において様々な検討がなされている。特許文献１には、リチウム二次電池において、簡易な構成で異種金属間の接合部で腐食が発生することを防止する電池端子に関する技術が開示されている。この電池端子は、金属から形成された第１の部分と、第１の部分とは異なる金属から形成された第２の部分とを有し、電極群を収容する内部空間から孔を通じて外側に延び出ている。第１の部分は内部空間から孔に向かって延び、第２の部分は第１の部分に接合され孔から内部空間の外側へ延び出ている。更に、この電池端子は第１の部分と第２の部分との境界位置を覆い、孔を封止するシール部材を備える。   Various studies have been made on materials and structures of battery terminals of secondary batteries in consideration of compatibility with the chemical reaction of the battery and reducing contact resistance. Patent Document 1 discloses a technique related to a battery terminal that prevents corrosion from occurring at a joint between different metals in a lithium secondary battery with a simple configuration. The battery terminal has a first portion made of metal and a second portion made of a metal different from the first portion, and extends outward from an internal space accommodating the electrode group. Out. The first portion extends from the internal space toward the hole, and the second portion is joined to the first portion and extends from the hole to the outside of the internal space. Further, the battery terminal includes a sealing member that covers a boundary position between the first portion and the second portion and seals the hole.

特開２００７−１３４２３３号公報JP 2007-134233 A

二次電池は、電池端子と外部接続するバスバーとの接続が不十分であると接触抵抗が増加してしまうため、性能を十分に発揮することが出来ない。従って、電池端子とバスバーとは接触抵抗が少なくなるように接続することが必須である。そこで、接触抵抗を低減するために、バスバーと強い結合力で接続出来る電池端子が求められている。更に、電池端子は、取り付け箇所において、電解液や内部で発生したガスを外部へ漏出しない安全性を有することも重要である。   Since the secondary battery has an insufficient connection between the battery terminal and the externally connected bus bar, the contact resistance increases, so that the performance cannot be sufficiently exhibited. Therefore, it is essential to connect the battery terminal and the bus bar so as to reduce the contact resistance. Therefore, in order to reduce the contact resistance, a battery terminal that can be connected to the bus bar with a strong coupling force is required. Furthermore, it is also important that the battery terminal has safety so that the electrolytic solution and the gas generated inside are not leaked to the outside at the mounting location.

本発明の目的は、バスバーと強い結合力で接続できる電池端子を提供することにある。
本発明の他の目的は、密閉性を有する電池端子を提供することにある。 An object of the present invention is to provide a battery terminal that can be connected to a bus bar with a strong coupling force.
Another object of the present invention is to provide a battery terminal having airtightness.

以下に、発明を実施するための最良の形態で使用される符号を括弧付きで用いて、課題を解決するための手段を記載する。この符号は、特許請求の範囲の記載と発明を実施するための最良の形態の記載との対応を明らかにするために付加されたものであり、特許請求の範囲に記載されている発明の技術的範囲の解釈に用いてはならない。   Hereinafter, means for solving the problems will be described by using the reference numerals used in the best mode for carrying out the invention in parentheses. This symbol is added to clarify the correspondence between the description of the claims and the description of the best mode for carrying out the invention, and the technology of the invention described in the claims. It should not be used to interpret the scope.

本発明の電池端子（４、５）は、柱状の第１端子部材（１０、１４、２０、２４）と、第１端子部材（１０、１４、２０、２４）と接合する柱状の第２端子部材（１２、１３、２２）と、第１端子部材（１０、１４、２０、２４）及び第２端子部材（１２、１３、２２）のうちの少なくとも一方の側面から外側へ突出する鍔部（１２ａ、１３ａ、１３ｃ、２２ａ）とを具備する。このような電池端子（４、５）は、円柱、楕円柱、多角柱などの柱状に形成されるため、断面の長辺が同じ長さの薄板と比較して断面積が大きい。従って、強度があり折れ曲がり難い。更に、柱状は、断面積が大きいことで導電性に優れ、薄板よりも大電流を流すうえで有利となる。また、鍔部（１２ａ、１３ａ、１３ｃ、２２ａ）は、二次電池（１）に設置された場合に、電池端子（４、５）と樹脂部材（６）とが結合する表面積を増加し、且つ鍔部（１２ａ、１３ａ、１３ｃ、２２ａ）の突出方向と直交する方向に引掛りをもたらし、樹脂部材（６）との結合力を上げる。更に、鍔部（１２ａ、１３ａ、１３ｃ、２２ａ）は、電池端子（４、５）と樹脂部材（６）との間から外部へ漏出することが考えられる電池内部（８）で発生したガス又は非水電解液の漏出経路（３０）を屈曲させ、漏出経路（３０）を長くすることで、それらを外部へ漏出させ難くすることが出来る。   The battery terminals (4, 5) of the present invention have a columnar first terminal member (10, 14, 20, 24) and a columnar second terminal joined to the first terminal member (10, 14, 20, 24). A collar ((12, 13, 22)) and a flange (1) projecting outward from at least one side surface of the first terminal member (10, 14, 20, 24) and the second terminal member (12, 13, 22). 12a, 13a, 13c, 22a). Since such battery terminals (4, 5) are formed in a columnar shape such as a cylinder, an elliptical column, or a polygonal column, the cross-sectional area is larger than that of a thin plate having the same long side. Therefore, it is strong and difficult to bend. Further, the columnar shape is excellent in conductivity because of its large cross-sectional area, and is more advantageous for flowing a larger current than a thin plate. Further, when the flanges (12a, 13a, 13c, 22a) are installed in the secondary battery (1), the surface area where the battery terminals (4, 5) and the resin member (6) are combined is increased. In addition, the hook is brought about in a direction perpendicular to the protruding direction of the flange portions (12a, 13a, 13c, 22a), and the binding force with the resin member (6) is increased. Further, the flanges (12a, 13a, 13c, 22a) are gas generated inside the battery (8) that is considered to leak out from between the battery terminals (4, 5) and the resin member (6) or By bending the leakage path (30) of the non-aqueous electrolyte and lengthening the leakage path (30), it is possible to make it difficult to leak them to the outside.

本発明の電池端子（４、５）における第１端子部材（１０、１４、２０、２４）は、銅又は真鍮から形成される。このような電池端子（４、５）は、バスバーとして使用されることの多い銅又は真鍮を用いることで、汎用性を高め、且つ接触抵抗を低減させることが可能である。更に、銅又は真鍮は強度が高いため、電池端子（４、５）の機械的強度を上げることが出来る。尚、第１端子部材（１０、１４、２０、２４）は、銅又は真鍮を主に含んでいれば良く、銅又は真鍮のみから形成されることに限定しない。   The first terminal members (10, 14, 20, 24) in the battery terminals (4, 5) of the present invention are made of copper or brass. Such a battery terminal (4, 5) can increase versatility and reduce contact resistance by using copper or brass, which is often used as a bus bar. Furthermore, since copper or brass has high strength, the mechanical strength of the battery terminals (4, 5) can be increased. In addition, the 1st terminal member (10, 14, 20, 24) should just contain copper or brass, and is not limited to being formed only from copper or brass.

本発明の電池端子（４、５）における第２端子部材（１２、１３、２２）は、アルミニウム又は銅から形成される。このような電池端子（４、５）は、アルミニウム又は銅を電極として用いる二次電池に適応することが出来る。尚、第２端子部材（１２、１３、２２）は、アルミニウム又は銅を主に含んでいれば良く、アルミニウム又は銅のみから形成されることに限定しない。   The 2nd terminal member (12, 13, 22) in the battery terminal (4, 5) of this invention is formed from aluminum or copper. Such battery terminals (4, 5) can be applied to a secondary battery using aluminum or copper as an electrode. In addition, the 2nd terminal member (12,13,22) should just contain aluminum or copper, and is not limited to being formed only from aluminum or copper.

本発明の電池端子（４、５）における鍔部（１２ａ、１３ａ、１３ｃ、２２ａ）は、第２端子部材（１２、１３、２２）の側面から突出する。このような電池端子（４、５）の鍔部（１２ａ、１３ａ、１３ｃ、２２ａ）は、二次電池（１）に設置された場合に、電池内部（８）で発生したガス又は非水電解液が境界面（１１、１８、２１）まで到達する距離を長くする。従って、境界面（１１、１８、２１）は、電池内部（８）で発生したガス又は非水電解液に曝され難く、それらに基づく腐食から保護される。   The flanges (12a, 13a, 13c, 22a) in the battery terminals (4, 5) of the present invention protrude from the side surface of the second terminal member (12, 13, 22). The flanges (12a, 13a, 13c, 22a) of such battery terminals (4, 5), when installed in the secondary battery (1), are gas generated inside the battery (8) or non-aqueous electrolysis. The distance that the liquid reaches the boundary surfaces (11, 18, 21) is increased. Therefore, the boundary surfaces (11, 18, 21) are not easily exposed to the gas or non-aqueous electrolyte generated inside the battery (8), and are protected from corrosion based on them.

本発明の電池端子（４、５）における鍔部（１２ａ、１３ａ、１３ｃ、２２ａ）は、第２端子部材（１２、１３、２２）から外側へ円形且つ面状に突出する。このような電池端子（４、５）は、鍔部（１２ａ、１３ａ、１３ｃ、２２ａ）と樹脂部材（６）との結合箇所における熱による変形が対称的となるため、樹脂部材（６）に応力の集中が生じ難い。   The flanges (12a, 13a, 13c, 22a) in the battery terminals (4, 5) of the present invention protrude from the second terminal members (12, 13, 22) to the outside in a circular and planar shape. Since such battery terminals (4, 5) are symmetrically deformed by heat at the joints between the flanges (12a, 13a, 13c, 22a) and the resin member (6), the resin terminals (6) Stress concentration is unlikely to occur.

本発明の電池端子（４、５）における第１端子部材（１０、１４、２０、２４）は、めねじ又はおねじである。このような電池端子（４、５）は、バスバーとの結合において、ねじ締結に基づく強い結合力を付与することが可能である。   The first terminal members (10, 14, 20, 24) in the battery terminals (4, 5) of the present invention are female screws or male screws. Such battery terminals (4, 5) can give a strong coupling force based on screw fastening in coupling with the bus bar.

本発明の二次電池（１）は、電池端子（４、５）と、挿通孔を有する電池蓋（３）と、挿通孔を挿通する電池端子（４、５）と電池蓋（３）とを、鍔部（１２ａ、１３ａ、１３ｃ、２２ａ）を覆い挿通孔を塞ぐように結合する樹脂部材（６）と、電池蓋（３）が結合する電池容器（２）とを具備する。電池端子（４、５）は、第１端子部材（１０、１４、２０、２４）が電池容器（２）から突出し、第２端子部材（１２、１３、２２）が電池容器（２）の内側に含まれる。このような二次電池（１）は、第１端子部材（１０、１４、２０、２４）の強度が強く、且つ樹脂部材（６）によって電池端子（４、５）と電池蓋（３）との結合が強いため、バスバーと強い結合力で接続することが可能となる。   The secondary battery (1) of the present invention includes a battery terminal (4, 5), a battery lid (3) having an insertion hole, a battery terminal (4, 5) and a battery lid (3) that are inserted through the insertion hole. Is provided with a resin member (6) that covers the flanges (12a, 13a, 13c, 22a) and is coupled so as to close the insertion hole, and a battery container (2) to which the battery lid (3) is coupled. The battery terminal (4, 5) has a first terminal member (10, 14, 20, 24) protruding from the battery container (2) and a second terminal member (12, 13, 22) inside the battery container (2). include. In such a secondary battery (1), the strength of the first terminal member (10, 14, 20, 24) is strong, and the battery terminal (4, 5) and the battery lid (3) are separated by the resin member (6). Since the coupling is strong, it is possible to connect to the bus bar with a strong coupling force.

本発明の電池端子（４、５）の製造方法は、第１金属材料と、第２金属材料とを摩擦圧接で接合する工程と、第１金属材料と第２金属材料との接合体を、鍔部（１２ａ、１３ａ、１３ｃ、２２ａ）を有する柱状の電池端子（４、５）へ加工する工程とを具備する。鍔部（１２ａ、１３ａ、１３ｃ、２２ａ）は電池端子（４、５）の側面から外側へ突出し、電池端子（４、５）は、第１金属部材から形成される第１端子部材（１０、１４、２０、２４）と、第２金属部材から形成される第２端子部材（１２、１３、２２）とを含む。このような電池端子（４、５）の製造方法は、第１端子部材（１０、１４、２０、２４）と第２端子部材（１２、１３、２２）との接触抵抗を低減させる。更に、第１端子部材（１０、１４、２０、２４）と第２端子部材（１２、１３、２２）との接合した境界面（１１、１８、２１）の強度が強い電池端子（４、５）を形成することが出来る。   The manufacturing method of the battery terminal (4, 5) of the present invention includes a step of joining the first metal material and the second metal material by friction welding, and a joined body of the first metal material and the second metal material. And processing into columnar battery terminals (4, 5) having flanges (12a, 13a, 13c, 22a). The flanges (12a, 13a, 13c, 22a) protrude outward from the side surfaces of the battery terminals (4, 5), and the battery terminals (4, 5) are first terminal members (10, 10) formed from a first metal member. 14, 20, 24) and second terminal members (12, 13, 22) formed from the second metal member. Such a manufacturing method of the battery terminals (4, 5) reduces the contact resistance between the first terminal members (10, 14, 20, 24) and the second terminal members (12, 13, 22). Furthermore, the battery terminals (4, 5, 21) having strong strength at the interface (11, 18, 21) where the first terminal member (10, 14, 20, 24) and the second terminal member (12, 13, 22) are joined together. ) Can be formed.

本発明の電池端子（４、５）の製造方法における第１金属材料は、銅又は真鍮を含む。   The 1st metal material in the manufacturing method of the battery terminal (4, 5) of this invention contains copper or brass.

本発明の電池端子（４、５）の製造方法における第２金属材料は、アルミニウム又は銅を含む。   The 2nd metal material in the manufacturing method of the battery terminal (4, 5) of this invention contains aluminum or copper.

本発明の電池端子（４、５）の製造方法における鍔部（１２ａ、１３ａ、１３ｃ、２２ａ）は、第２端子部材（１２、１３、２２）の側面から外側へ突出する。   The flanges (12a, 13a, 13c, 22a) in the method for manufacturing the battery terminal (4, 5) of the present invention protrude outward from the side surface of the second terminal member (12, 13, 22).

本発明の電池端子（４、５）の製造方法における鍔部（１２ａ、１３ａ、１３ｃ、２２ａ）は、第２端子部材（１２、１３、２２）の側面から円形且つ面状に突出する。   The flanges (12a, 13a, 13c, 22a) in the method for manufacturing the battery terminals (4, 5) of the present invention project in a circular and planar shape from the side surface of the second terminal member (12, 13, 22).

本発明の電池端子（４、５）の製造方法であって、第１端子部材（１０、１４、２０、２４）をおねじ又はめねじに加工する工程を更に具備する。   It is a manufacturing method of the battery terminal (4, 5) of this invention, Comprising: The process of processing a 1st terminal member (10, 14, 20, 24) into a male screw or a female screw is further provided.

本発明の二次電池（１）の製造方法は、電池端子（４、５）を製造する工程と、電池端子（４、５）と挿通孔を有する電池蓋（３）とを、鍔部（１２ａ、１３ａ、１３ｃ、２２ａ）を覆い挿通孔を塞ぐように樹脂部材（６）で結合する工程と、電池端子（４、５）が結合した電池蓋（３）を、第１端子部材（１０、１４、２０、２４）が電池容器（２）から突出し、第２端子部材（１２、１３、２２）が電池容器（２）の内側に含まれるように電池容器（２）に結合する工程とを具備する。   The method for producing a secondary battery (1) of the present invention comprises a step of producing battery terminals (4, 5), a battery terminal (4, 5) and a battery lid (3) having an insertion hole. 12a, 13a, 13c, 22a) and the resin lid (6) so as to close the insertion hole, and the battery lid (3) to which the battery terminals (4, 5) are joined are connected to the first terminal member (10). , 14, 20, 24) projecting from the battery container (2), and the second terminal member (12, 13, 22) is coupled to the battery container (2) so as to be included inside the battery container (2); It comprises.

本発明の電池端子は、バスバーと強い結合力で接続することが出来るため、接触抵抗を減少させ、信頼性の高い電池端子を提供することが出来る。   Since the battery terminal of the present invention can be connected to the bus bar with a strong coupling force, the contact resistance can be reduced and a highly reliable battery terminal can be provided.

以下、添付図面を参照して本発明の実施の形態による電池端子を説明する。本発明の電池端子は、二次電池に適用されるが、リチウム二次電池１を例に説明をする。   Hereinafter, a battery terminal according to an embodiment of the present invention will be described with reference to the accompanying drawings. The battery terminal of the present invention is applied to a secondary battery, and the lithium secondary battery 1 will be described as an example.

図１は、本発明の第１の実施の形態によるリチウム二次電池１の斜視図である。図１を参照すると、リチウム二次電池１は、電池容器２と、電池蓋３と、正極端子４と、負極端子５と、樹脂部材６と、安全弁７とを具備する。   FIG. 1 is a perspective view of a lithium secondary battery 1 according to the first embodiment of the present invention. Referring to FIG. 1, a lithium secondary battery 1 includes a battery container 2, a battery lid 3, a positive terminal 4, a negative terminal 5, a resin member 6, and a safety valve 7.

電池容器２は、充放電部（図示省略）を保持する。充放電部は、内部に正極、負極及び非水電解液を含み充電及び放電を行う部位である。電池容器２は、側面と底面を含む中空の容器であり、略直方体形状が例示される。電池容器２は、ステンレスやアルミニウムなどの金属又は樹脂から形成される。電池容器２の材質、形成方法及び充放電部ついては周知の技術を用いることが出来る。   The battery container 2 holds a charge / discharge part (not shown). A charging / discharging part is a site | part which contains a positive electrode, a negative electrode, and a non-aqueous electrolyte inside, and performs charge and discharge. The battery container 2 is a hollow container including a side surface and a bottom surface, and has a substantially rectangular parallelepiped shape. The battery container 2 is formed from a metal such as stainless steel or aluminum or a resin. A well-known technique can be used about the material of the battery container 2, a formation method, and a charging / discharging part.

電池蓋３は、電池容器２と結合する上蓋である。電池蓋３は、正極端子４及び負極端子５を挿通する挿通孔を有している。電池蓋３は、電池容器２同様に、ステンレスやアルミニウムなどの金属又は樹脂から形成される。電池蓋３の材質、形成方法及び電池容器２との結合方法は、周知の技術を用いることが出来る。   The battery lid 3 is an upper lid that is coupled to the battery container 2. The battery lid 3 has an insertion hole through which the positive terminal 4 and the negative terminal 5 are inserted. The battery lid 3 is made of a metal such as stainless steel or aluminum or a resin, like the battery container 2. A well-known technique can be used for the material of the battery cover 3, a formation method, and the connection method with the battery container 2. FIG.

正極端子４は、電池容器２に保持される充放電部の正極と接続し、電池蓋３から突出する。負極端子５は、電池容器２に保持される充放電部の負極と接続し、電池蓋３から突出する。突出した正極端子４の端子上部１０及び負極端子５の端子上部２０は、外部接続するためのバスバーと接続する。バスバーは、銅又は真鍮からなる導体である。バスバーの接続部は、正極端子４及び負極端子５の形状に合わせて形成される。端子上部１０及び端子上部２０とバスバーとの接続方法は、接触抵抗を低減する十分な結合力が得られること、接続方法が容易であること、接続部の形成が容易であることが好ましい。そこで、本発明は、おねじ及びめねじに基づくねじ締結を接続方法として使用する。本発明の第１の実施の形態では、端子上部１０及び端子上部２０がめねじであり、バスバーとの接続ではボルト等のおねじ部を有する。正極端子４及び負極端子５の詳細は後述する。   The positive electrode terminal 4 is connected to the positive electrode of the charging / discharging unit held by the battery container 2 and protrudes from the battery lid 3. The negative electrode terminal 5 is connected to the negative electrode of the charge / discharge part held by the battery container 2 and protrudes from the battery lid 3. The protruding terminal upper part 10 of the positive electrode terminal 4 and terminal upper part 20 of the negative electrode terminal 5 are connected to a bus bar for external connection. The bus bar is a conductor made of copper or brass. The connection portion of the bus bar is formed according to the shape of the positive electrode terminal 4 and the negative electrode terminal 5. It is preferable that the connection method of the terminal upper part 10 and the terminal upper part 20 and the bus bar is that a sufficient coupling force for reducing the contact resistance is obtained, the connection method is easy, and the formation of the connection part is easy. Therefore, the present invention uses screw fastening based on male and female screws as a connection method. In the first embodiment of the present invention, the terminal upper part 10 and the terminal upper part 20 are female threads, and have a male thread part such as a bolt when connected to the bus bar. Details of the positive electrode terminal 4 and the negative electrode terminal 5 will be described later.

樹脂部材６は、挿通孔を挿通する正極端子４及び負極端子５を、挿通孔を塞ぐように電池蓋３に結合する。樹脂部材６は、正極端子４及び負極端子５を固定できる強度と、電池容器２に保持される充放電部の非水電解液に対する耐薬品性とを有する樹脂である。樹脂は、フェノール樹脂などの熱硬化性樹脂、ポリフェニレンスルファイド（ＰＰＳ）などの熱可塑性樹脂が例示される。樹脂部材６は、電池蓋３と正極端子４及び負極端子５とを強固に結合する。樹脂部材６に基づく結合力は、正極端子４及び負極端子５とバスバーとの接触抵抗を低減するために付与される、おねじ及びめねじに基づく結合力よりも大きい。従って、樹脂部材６は、正極端子４及び負極端子５とバスバーとを十分に結合させるために締付けられても、破断しない。   The resin member 6 couples the positive electrode terminal 4 and the negative electrode terminal 5 inserted through the insertion hole to the battery lid 3 so as to close the insertion hole. The resin member 6 is a resin having strength capable of fixing the positive electrode terminal 4 and the negative electrode terminal 5 and chemical resistance against the non-aqueous electrolyte of the charge / discharge part held by the battery container 2. Examples of the resin include a thermosetting resin such as a phenol resin, and a thermoplastic resin such as polyphenylene sulfide (PPS). The resin member 6 firmly bonds the battery lid 3 to the positive terminal 4 and the negative terminal 5. The bonding force based on the resin member 6 is larger than the bonding force based on the male screw and the female screw that is applied to reduce the contact resistance between the positive electrode terminal 4 and the negative electrode terminal 5 and the bus bar. Therefore, even if the resin member 6 is tightened to sufficiently bond the positive electrode terminal 4 and the negative electrode terminal 5 to the bus bar, it does not break.

樹脂部材６は、正極端子４及び負極端子５と電池蓋３との間を隙間なく充填する。従って、樹脂部材６によって、電池容器２と電池蓋３とは充放電部を密閉する。つまり、非水電解液又は電池容器２の内部で発生したガスは、樹脂部材６によって正極端子４及び負極端子５と電池蓋３との間から外部へ漏出しない。   The resin member 6 fills the space between the positive electrode terminal 4 and the negative electrode terminal 5 and the battery lid 3 without a gap. Therefore, the battery container 2 and the battery lid 3 seal the charging / discharging part by the resin member 6. That is, the gas generated inside the non-aqueous electrolyte or the battery container 2 does not leak out from between the positive electrode terminal 4 and the negative electrode terminal 5 and the battery lid 3 by the resin member 6.

安全弁７は、アルミニウム薄膜から形成される。安全弁７は、リチウム二次電池１の内圧が許容圧力を超えた場合、内部のガスを放出するように機能する。安全弁７に係る技術は、周知の技術を用いることが出来る。   The safety valve 7 is formed from an aluminum thin film. The safety valve 7 functions to release the internal gas when the internal pressure of the lithium secondary battery 1 exceeds the allowable pressure. A known technique can be used as the technique related to the safety valve 7.

図２は、図１に示したリチウム二次電池１のＡ１−Ａ２部分断面図である。図２を参照して、正極端子４及び負極端子５の詳細を説明する。尚、電池容器２と電池蓋３とで覆われた電池内部８に含まれる正極、負極及び非水電解液を含む充放電部は図示を省略する。   2 is an A1-A2 partial cross-sectional view of the lithium secondary battery 1 shown in FIG. Details of the positive electrode terminal 4 and the negative electrode terminal 5 will be described with reference to FIG. The charging / discharging unit including the positive electrode, the negative electrode, and the non-aqueous electrolyte contained in the battery interior 8 covered with the battery container 2 and the battery lid 3 is not shown.

まず、正極端子４について説明する。正極端子４は、端子上部１０と、端子下部１２とを備える。   First, the positive electrode terminal 4 will be described. The positive electrode terminal 4 includes a terminal upper part 10 and a terminal lower part 12.

端子上部１０は、バスバーと外部接続するためのボルト等のおねじ部を有する部品が接続するめねじである。従って、端子上部１０は、バスバーと結合可能なねじ穴を有する。端子上部１０は、バスバーとの接触抵抗を小さく保つこと、バスバーとのねじ締結に耐えうる機械的強度を有すること及び汎用性が高いことを満たす材料で形成される。材料には、銅又は、真鍮などの銅を主原料とする合金が好ましい。尚、ねじ穴は、端子下部１２に達していてもよいが、端子下部１２の強度がねじ締結に耐えうる機械的強度を有しない場合は、端子下部１２に達していないことが好ましい。   The terminal upper portion 10 is a female screw to which a component having a male screw portion such as a bolt for external connection with the bus bar is connected. Accordingly, the terminal upper portion 10 has a screw hole that can be coupled to the bus bar. The terminal upper portion 10 is formed of a material that satisfies a low contact resistance with the bus bar, a mechanical strength that can withstand screw fastening with the bus bar, and a high versatility. The material is preferably copper or an alloy mainly made of copper such as brass. In addition, although the screw hole may reach the terminal lower part 12, when the intensity | strength of the terminal lower part 12 does not have the mechanical strength which can endure screw fastening, it is preferable that the terminal lower part 12 is not reached.

端子下部１２は、電池内部８に含まれる充放電部の正極と接続する。端子下部１２は、正極との接触抵抗を低減すること及び電池内部８の非水電解液と反応しないことを満たす材料から形成される。正極はアルミニウムによって形成されるため、端子下部１２もアルミニウムから形成されることが好ましい。尚、端子上部１０と端子下部１２とは、異なる金属材料から形成されるため、接触抵抗を低減させる必要がある。そこで、端子上部１０と端子下部１２とは、摩擦圧接、電子ビーム溶接など接触抵抗を低減し、端子上部１０と端子下部１２との境界面１１の強度が強い溶接によって接合される。また、境界面１１は、異種金属の接触に基づく腐食を防ぐために、樹脂部材６によって覆われる。   The terminal lower part 12 is connected to the positive electrode of the charge / discharge part included in the battery interior 8. The lower terminal portion 12 is formed of a material that satisfies a reduction in contact resistance with the positive electrode and that it does not react with the nonaqueous electrolyte inside the battery 8. Since the positive electrode is made of aluminum, the terminal lower portion 12 is also preferably made of aluminum. In addition, since the terminal upper part 10 and the terminal lower part 12 are formed from a different metal material, it is necessary to reduce contact resistance. Therefore, the terminal upper portion 10 and the terminal lower portion 12 are joined by welding with reduced contact resistance such as friction welding, electron beam welding, and the strength of the boundary surface 11 between the terminal upper portion 10 and the terminal lower portion 12. Further, the boundary surface 11 is covered with the resin member 6 in order to prevent corrosion due to the contact of different metals.

端子下部１２の詳細を説明する。端子下部１２は、鍔部１２ａと、鍔下部１２ｂと、接続部１２ｃとを含む。図３は、本発明の第１の実施の形態による正極端子４を示した斜視図である。図３を参照すると、鍔部１２ａは、端子下部１２の側面から外側へ突出した部位である。鍔部１２ａは、樹脂部材６との結合力を上げる効果と、電池内部８で発生したガス又は非水電解液を外部へ漏出させ難くする効果をもたらす。   Details of the terminal lower portion 12 will be described. The terminal lower portion 12 includes a flange portion 12a, a flange lower portion 12b, and a connection portion 12c. FIG. 3 is a perspective view showing the positive terminal 4 according to the first embodiment of the present invention. Referring to FIG. 3, the flange portion 12 a is a portion protruding outward from the side surface of the terminal lower portion 12. The flange portion 12a brings about an effect of increasing the bonding force with the resin member 6 and an effect of making it difficult for the gas generated in the battery inside 8 or the non-aqueous electrolyte to leak out.

鍔部１２ａが正極端子４と樹脂部材６との結合力を上げる効果について説明する。図２を参照すると、鍔部１２ａは、樹脂部材６に周囲を覆われる。従って、鍔部１２ａは、正極端子４と樹脂部材６とが結合する表面積を増加し、且つ鍔部１２ａの突出方向と直交する方向（主にリチウム二次電池１の上下方向）に引掛りをもたらす。これらの作用に基づいて、鍔部１２ａは、正極端子４と樹脂部材６との結合をより強固にする。   The effect that the flange 12a increases the bonding force between the positive electrode terminal 4 and the resin member 6 will be described. Referring to FIG. 2, the flange portion 12 a is covered with the resin member 6. Accordingly, the flange portion 12a increases the surface area where the positive electrode terminal 4 and the resin member 6 are bonded, and is hooked in a direction perpendicular to the protruding direction of the flange portion 12a (mainly the vertical direction of the lithium secondary battery 1). Bring. Based on these actions, the flange portion 12 a further strengthens the bond between the positive electrode terminal 4 and the resin member 6.

鍔部１２ａが、電池内部８で発生したガス又は非水電解液を外部へ漏出させ難くする効果について説明する。図４は、図２に示した正極端子４の拡大図である。図４を参照すると、電池内部８で発生したガス又は非水電解液は、正極端子４と樹脂部材６との間から外部へ漏出することが考えられる。その場合、電池内部８で発生したガス又は非水電解液は、漏出経路３０を通る。鍔部１２ａは、正極端子４と樹脂部材６との間の漏出経路３０を屈曲させ、漏出経路３０を長くする。漏出経路３０が長くなると、漏出経路３０内で完全に塞がれている箇所が存在する確率が高くなり、電池内部８で発生したガス又は非水電解液は外部へ漏出できなくなる。即ち、鍔部１２ａは、漏出経路３０を長くすることで、それらを外部へ漏出し難い構成をリチウム二次電池１にもたらす。   The effect which the collar part 12a makes it difficult to leak the gas generated in the battery inside 8 or a nonaqueous electrolyte solution outside is demonstrated. FIG. 4 is an enlarged view of the positive electrode terminal 4 shown in FIG. Referring to FIG. 4, it is conceivable that the gas or non-aqueous electrolyte generated inside the battery 8 leaks from between the positive electrode terminal 4 and the resin member 6 to the outside. In that case, the gas or non-aqueous electrolyte generated inside the battery 8 passes through the leakage path 30. The flange 12a bends the leakage path 30 between the positive electrode terminal 4 and the resin member 6, and lengthens the leakage path 30. If the leakage path 30 becomes longer, the probability that there is a location that is completely blocked in the leakage path 30 increases, and the gas or non-aqueous electrolyte generated in the battery interior 8 cannot leak to the outside. That is, the eaves part 12a lengthens the leakage path 30 to bring the lithium secondary battery 1 with a configuration that makes it difficult to leak them to the outside.

鍔部１２ａは、樹脂部材６との結合力を上げる効果と、電池内部８で発生したガス又は非水電解液が外部へ漏出させ難くする効果を奏するために、端子下部１２の側面から外側へ面状に突出する形状が好ましい。更に、鍔部１２ａが端子下部１２の側面から外側へ円形に突出する形状は、角を有する形状に比べて、正極端子４及び樹脂部材６の熱による変形にも応力が局所的に角に集中することがないため大変有効である。また、鍔部１２ａは、外周端が波打つ形状や、外周端に向かうに従って厚くなる形状や、薄くなる形状など厚みが変化してもよい。その他、鍔部１２ａが、端子下部１２の側面から突出する複数の突起でも、結合力を上げる効果をもたらすことが可能である。また、鍔部１２ａは、三角状、四角状など角を有して形成することも可能である。   The flange portion 12a extends from the side surface of the terminal lower portion 12 to the outside in order to achieve an effect of increasing the bonding force with the resin member 6 and an effect of making it difficult for the gas generated in the battery interior 8 or the non-aqueous electrolyte to leak out. A shape protruding in a planar shape is preferable. Furthermore, the shape in which the flange portion 12a protrudes outward from the side surface of the terminal lower portion 12 is more concentrated in the corners than the shape having corners, even when the positive terminal 4 and the resin member 6 are deformed by heat. It is very effective because there is nothing to do. In addition, the thickness of the flange portion 12a may change, such as a shape in which the outer peripheral end is wavy, a shape that becomes thicker toward the outer peripheral end, or a shape that becomes thinner. In addition, even if the flange portion 12a has a plurality of protrusions protruding from the side surface of the terminal lower portion 12, it is possible to bring about an effect of increasing the coupling force. Moreover, the collar part 12a can also be formed with a corner such as a triangular shape or a square shape.

鍔部１２ａは、境界面１１が電池内部８で発生したガス又は非水電解液に曝され難くするために、端子下部１２に含まれることが好ましい。鍔部１２ａが、電池内部８で発生したガス又は非水電解液と、端子上部１０と端子下部１２とが接合した境界面１１とを接触させ難くすると、境界面１１はそれらに基づく腐食から保護される。但し、鍔部１２ａは、端子上部１０と同じ金属で端子上部１０に含まれるとしてもよい。鍔部１２ａが端子上部１０に含まれると、鍔部１２ａの強度において優れる。また、鍔部１２ａは、端子上部１０及び端子下部１２との接合体の境界面１１を含み、両方の金属から形成されてもよい。また、鍔部１２ａは、端子上部１０と端子下部１２との境界面１１の近傍に位置しているが、境界面１１から離れて配置されてもよい。   The flange 12a is preferably included in the lower terminal portion 12 in order to make the boundary surface 11 difficult to be exposed to the gas generated in the battery interior 8 or the non-aqueous electrolyte. If the flange portion 12a makes it difficult to contact the gas generated in the battery interior 8 or the non-aqueous electrolyte and the boundary surface 11 where the terminal upper portion 10 and the terminal lower portion 12 are joined, the boundary surface 11 is protected from corrosion based on them. Is done. However, the flange portion 12a may be the same metal as the terminal upper portion 10 and may be included in the terminal upper portion 10. When the flange portion 12a is included in the terminal upper portion 10, the strength of the flange portion 12a is excellent. Moreover, the collar part 12a contains the boundary surface 11 of the conjugate | zygote with the terminal upper part 10 and the terminal lower part 12, and may be formed from both metals. Further, the flange 12 a is located in the vicinity of the boundary surface 11 between the terminal upper portion 10 and the terminal lower portion 12, but may be disposed away from the boundary surface 11.

鍔下部１２ｂは、鍔部１２ａと接続部１２ｃとの中間に位置する部位である。鍔下部１２ｂは、正極端子４の強度をもたらすこと及び正極端子４へ大電流を流せるようにすることから、端子上部１０と同じ形状、同じ太さであることが好ましい。但し、鍔下部１２ｂは、端子上部１０と異なる形状及び太さで形成することも可能である。接続部１２ｃは、電池内部８に含まれる充放電部の正極と接続する。接続部１２ｃと正極との接続方法は、周知の技術を用いることが出来る。従って、図２では、正極と接続している接続部１２ｃの部位は略して示されている。   The collar lower part 12b is a part located in the middle of the collar part 12a and the connection part 12c. The collar lower part 12 b preferably has the same shape and the same thickness as the terminal upper part 10 in order to bring about the strength of the positive electrode terminal 4 and to allow a large current to flow to the positive electrode terminal 4. However, the lower part 12b can be formed in a shape and thickness different from those of the terminal upper part 10. The connection part 12 c is connected to the positive electrode of the charge / discharge part included in the battery interior 8. A well-known technique can be used for the connection method of the connection part 12c and a positive electrode. Therefore, in FIG. 2, the part of the connection part 12c connected to the positive electrode is omitted.

また、正極端子４の端子上部１０及び鍔下部１２ｂは、端子上部１０にねじ穴が設け易い、円柱、楕円柱、多角柱など、柱状に形成される。また、柱状は、断面の長辺が同じ長さの薄板と比較して、断面積が大きいため、強度があり折れ曲がり難い。更に、柱状は、断面積が大きいことで導電性に優れ、薄板よりも大電流を流すうえで有利となる。柱状の内でも特に円柱は、端子上部１０及び鍔下部１２ｂと樹脂部材６との結合箇所における熱による変形が対称的となるため、樹脂部材６に応力の集中が生じ難いため好ましい。熱による変形が対称となる効果を発揮させるには、鍔部１２ａも端子上部１０及び鍔下部１２ｂと同心円状であることが好ましい。   Moreover, the terminal upper part 10 and the collar lower part 12b of the positive electrode terminal 4 are formed in columnar shapes, such as a cylinder, an elliptical column, and a polygonal column, in which a screw hole is easily provided in the terminal upper part 10. In addition, the columnar shape has a large cross-sectional area compared to a thin plate having the same long side in the cross section, and is strong and difficult to bend. Further, the columnar shape is excellent in conductivity because of its large cross-sectional area, and is more advantageous for flowing a larger current than a thin plate. Among the columnar shapes, a cylinder is particularly preferable because the deformation due to heat at the joint portion between the terminal upper part 10 and the collar lower part 12b and the resin member 6 becomes symmetrical, and stress concentration is unlikely to occur in the resin member 6. In order to exhibit the effect that the deformation due to heat is symmetric, it is preferable that the flange portion 12a is also concentric with the terminal upper portion 10 and the flange lower portion 12b.

正極端子４の製造方法について説明する。前述した端子上部１０に適合する金属材料と、前述した端子下部２０に適合する金属材料とは、摩擦圧接、電子ビーム溶接など溶接によって接合される。接合された金属材料は、切削又はプレスを施され、鍔部１２ａを含む柱状を含む柱状の正極端子４に加工される。この正極端子４は、端子上部１０と、鍔部１２ａを含む端子下部１２とを備える。端子上部１０は、バスバーをボルト等のおねじ部を有する部品で結合するためのねじ穴が切削に基づき形成され、めねじとなる。端子下部１２は、充放電部の正極に接続するために接続部１２ｃを正極に合わせて加工される。   A method for manufacturing the positive electrode terminal 4 will be described. The metal material suitable for the terminal upper part 10 and the metal material suitable for the terminal lower part 20 are joined by welding such as friction welding or electron beam welding. The joined metal material is cut or pressed to be processed into a columnar positive electrode terminal 4 including a columnar shape including the flange 12a. The positive electrode terminal 4 includes a terminal upper portion 10 and a terminal lower portion 12 including a flange portion 12a. The terminal upper part 10 is formed with a screw hole for joining the bus bar with a part having a screw part such as a bolt based on the cutting, and becomes a female screw. In order to connect the terminal lower part 12 to the positive electrode of a charging / discharging part, the connection part 12c is processed according to a positive electrode.

次に、図２を参照して、負極端子５について説明する。負極端子５は、正極端子４と同様に、端子上部２０と、端子下部２２とを備える。   Next, the negative electrode terminal 5 will be described with reference to FIG. Similarly to the positive electrode terminal 4, the negative electrode terminal 5 includes a terminal upper part 20 and a terminal lower part 22.

端子上部２０は、端子上部１０と同様に、バスバーをボルト等のおねじ部を有する部品で接続するためのめねじである。そして、端子上部２０は、端子上部１０と同様に、バスバーとの接触抵抗を小さく保つこと、バスバーとのねじ締結に耐えうる機械的強度を有すること及び汎用性が高いことを満たす材料で形成される。材料には、銅又は、真鍮などの銅を主原料とする合金が好ましい。   Similarly to the terminal upper portion 10, the terminal upper portion 20 is a female screw for connecting the bus bar with a component having a male screw portion such as a bolt. The terminal upper portion 20 is formed of a material that maintains a low contact resistance with the bus bar, has a mechanical strength that can withstand screw fastening with the bus bar, and has high versatility, like the terminal upper portion 10. The The material is preferably copper or an alloy mainly made of copper such as brass.

端子下部２２は、電池内部８に含まれる充放電部の負極と接続する。端子下部２２は、負極との接触抵抗を低減すること及び電池内部８の非水電解液と反応しないことを満たす材料から形成される。負極は銅によって形成されるため、端子下部２２も銅から形成されることが好ましい。従って、負極端子５は、端子上部２０と端子下部２２とが真鍮と銅の異種金属の場合と、何れも銅の場合とがある。   The terminal lower part 22 is connected to the negative electrode of the charge / discharge part included in the battery interior 8. The terminal lower portion 22 is formed of a material that satisfies the requirement of reducing the contact resistance with the negative electrode and not reacting with the non-aqueous electrolyte inside the battery 8. Since the negative electrode is formed of copper, it is preferable that the terminal lower portion 22 is also formed of copper. Therefore, the negative electrode terminal 5 has a case where the terminal upper portion 20 and the terminal lower portion 22 are made of different metals such as brass and copper, and both cases are made of copper.

端子下部２２は、鍔部２２ａと、鍔下部２２ｂと、接続部２２ｃとを含む。鍔部２２ａは前述した鍔部１２ａと同様であり、鍔下部２２ｂは前述した鍔下部１２ｂと同様である。尚、端子上部２０と端子下部２２とが異種金属で形成される場合、鍔部２２ａは、境界面２１が電池内部８で発生したガス又は非水電解液に曝され難くするために、端子下部２２に含まれることが好ましいが、端子上部２０と同じ金属で端子上部２０に含まれるとしてもよい。また、端子上部２０と端子下部２２とが異種金属の場合、鍔部２２ａは、端子上部２０及び端子下部２２との接合体の境界面２１を含み、両方の金属から形成されてもよい。また、鍔部２２ａは、端子上部２０と端子下部２２との境界面２１の近傍に位置しているが、境界面２１から離れて配置されてもよい。   The terminal lower portion 22 includes a flange portion 22a, a flange lower portion 22b, and a connection portion 22c. The collar part 22a is the same as the collar part 12a mentioned above, and the collar part 22b is the same as the collar part 12b mentioned above. When the terminal upper portion 20 and the terminal lower portion 22 are formed of different metals, the flange portion 22a has a lower terminal portion in order to make the boundary surface 21 difficult to be exposed to the gas generated in the battery interior 8 or the non-aqueous electrolyte. 22, it may be included in the terminal upper portion 20 with the same metal as the terminal upper portion 20. Moreover, when the terminal upper part 20 and the terminal lower part 22 are dissimilar metals, the collar part 22a contains the boundary surface 21 of the conjugate | zygote with the terminal upper part 20 and the terminal lower part 22, and may be formed from both metals. Further, the flange 22 a is located in the vicinity of the boundary surface 21 between the terminal upper portion 20 and the terminal lower portion 22, but may be disposed away from the boundary surface 21.

接続部２２ｃは、電池内部８の充放電部の負極と接続する。接続部２２ｃと負極との接続方法は、周知の技術を用いることが出来る。従って、図２では、負極と接続している接続部２２ｃの部位は略して示されている。   The connection part 22 c is connected to the negative electrode of the charge / discharge part inside the battery 8. A well-known technique can be used for the connection method of the connection part 22c and a negative electrode. Therefore, in FIG. 2, the part of the connection part 22c connected to the negative electrode is shown in abbreviated manner.

負極端子５の製造方法について説明する。負極端子５は、端子上部２０と端子下部２２とが異種金属の場合と、何れも銅の場合とがあり、負極端子５を形成する方法も異なる。異種金属の場合は、正極端子４と同様に、前述した端子上部２０に適合する柱状の金属材料と、前述した端子下部２２に適合する柱状の金属材料とは、摩擦圧接、電子ビーム溶接など溶接によって接合される。金属材料の接合体は、切削又はプレスを施され、鍔部２２ａを含む柱状の負極端子５に加工される。この負極端子５は、端子上部２０と、鍔部２２ａを含む端子下部２２とを備える。端子上部２０は、バスバーをおねじ部を有する部品で結合するためのねじ穴が切削に基づき形成され、めねじとなる。端子下部２２は、充放電部の負極に接続するために接続部２２ｃを負極に合わせて加工される。端子上部２０と、端子下部２２とが何れも銅の場合は、銅からなる柱状の金属材料が、切削又はプレスを施され、鍔部２２ａを含む柱状の負極端子５に加工される。そして、異種金属の接合の場合と同様に、端部の一方にめねじが形成され端子上部２０となる。もう一方の端部は、充放電部の負極に接続するための接続部２２ｃが形成される。   A method for manufacturing the negative electrode terminal 5 will be described. The negative electrode terminal 5 includes a case where the terminal upper portion 20 and the terminal lower portion 22 are made of different metals and a case where both are made of copper, and the method of forming the negative electrode terminal 5 is also different. In the case of a dissimilar metal, like the positive electrode terminal 4, the columnar metal material suitable for the terminal upper part 20 and the columnar metal material suitable for the terminal lower part 22 are welded by friction welding, electron beam welding or the like. Joined by. The joined body of metal material is cut or pressed, and processed into the columnar negative electrode terminal 5 including the flange portion 22a. The negative electrode terminal 5 includes a terminal upper portion 20 and a terminal lower portion 22 including a flange portion 22a. The terminal upper portion 20 is formed with a screw hole for joining the bus bar with a part having a male screw portion based on cutting, and becomes a female screw. In order to connect the terminal lower part 22 with the negative electrode of a charging / discharging part, the connection part 22c is processed according to a negative electrode. When both the terminal upper portion 20 and the terminal lower portion 22 are copper, a columnar metal material made of copper is cut or pressed to be processed into the columnar negative electrode terminal 5 including the flange portion 22a. Then, as in the case of joining different metals, a female screw is formed on one of the end portions to form the terminal upper portion 20. The other end portion is formed with a connection portion 22c for connecting to the negative electrode of the charge / discharge portion.

正極端子４又は負極端子５を備えるリチウム二次電池１の製造方法を説明する。正極端子４又は負極端子５と電池蓋３とは、正極端子４の鍔部１２ａ又は負極端子５の鍔部２２ａを覆い挿通孔を塞ぐように樹脂部材６によって結合される。正極端子４の接合部１２ｃ又は負極端子５の接合部２２ｃは、電池容器２の内部の電極と接続される。そして、正極端子４又は負極端子５を含む電池蓋３は、電池容器２に結合される。リチウム二次電池１に係るその他の製造方法は、周知の方法を用いることが出来る。   The manufacturing method of the lithium secondary battery 1 provided with the positive electrode terminal 4 or the negative electrode terminal 5 is demonstrated. The positive electrode terminal 4 or the negative electrode terminal 5 and the battery lid 3 are coupled by the resin member 6 so as to cover the flange 12a of the positive electrode terminal 4 or the flange 22a of the negative electrode terminal 5 and close the insertion hole. The joint 12 c of the positive terminal 4 or the joint 22 c of the negative terminal 5 is connected to the electrode inside the battery container 2. The battery lid 3 including the positive electrode terminal 4 or the negative electrode terminal 5 is coupled to the battery container 2. As other manufacturing methods according to the lithium secondary battery 1, known methods can be used.

本発明の第１の実施の形態によるリチウム二次電池１の電池端子、即ち正極端子４又は負極端子５は、構造及び材料強度に基づいて強い結合力でバスバーと接続することが出来るため、バスバーとの接続において生じる接触抵抗を低減し、電池端子としての信頼性及び汎用性を高めることが出来る。構造及び材料強度は、正極端子４については、正極端子４に備わる鍔部１２ａと、端子上部１０と、更に正極端子４を固定する樹脂部材６との各部に基づいている。特に、鍔部１２ａは樹脂部材６との結合力を強める効果を奏し、端子上部１０は材料強度とめねじによってバスバーと強い結合力を容易に付与させることが出来き、且つ外れ難い効果をもたらしている。   The battery terminal of the lithium secondary battery 1 according to the first embodiment of the present invention, that is, the positive electrode terminal 4 or the negative electrode terminal 5 can be connected to the bus bar with a strong bonding force based on the structure and material strength. The contact resistance generated in connection with the battery terminal can be reduced, and the reliability and versatility as a battery terminal can be improved. The structure and material strength of the positive electrode terminal 4 are based on the respective parts of the flange portion 12 a provided in the positive electrode terminal 4, the terminal upper portion 10, and the resin member 6 that fixes the positive electrode terminal 4. In particular, the collar portion 12a has an effect of strengthening the coupling force with the resin member 6, and the terminal upper portion 10 can easily impart a strong coupling force with the bus bar by the material strength and the female screw, and brings about an effect that is difficult to come off. Yes.

また、鍔部１２ａは、非水電解液又は電池内部８で発生したガスの外部への漏出に対して、漏出経路３０を屈曲して漏出し難い効果を奏しているため、より安全な構造をリチウム二次電池１へ提供する。また、端子上部１０及び鍔下部１２ｂの柱状は、強度及び大電流を流す上で薄板よりも有効であり、めねじを形成しやすい効果も奏している。尚、これらの効果は、負極端子５も同様である。   Moreover, since the collar part 12a has the effect which is hard to leak by bending the leak path | route 30 with respect to the leakage of the gas which generate | occur | produced in the non-aqueous electrolyte or the battery inside 8, it has a safer structure. Provided to the lithium secondary battery 1. Further, the columnar shapes of the terminal upper portion 10 and the collar lower portion 12b are more effective than the thin plate in flowing strength and a large current, and also have an effect of easily forming a female screw. These effects are the same for the negative electrode terminal 5.

次に、本発明の第２の実施の形態について説明する。本発明の第２の実施の形態によるリチウム二次電池１の斜視図は図１と同様である。図５は、本発明の第２の実施の形態による正極端子４の図１のＡ１−Ａ２部分断面図である。図５を参照すると、正極端子４は、端子上部１０と、端子下部１３とを備える。本発明の第２の実施の形態は、第１の実施の形態と比較して端子下部１３の構成が異なるものである。端子上部１０及びその他のリチウム二次電池１に係る構成及び製造方法は、第１の実施の形態と同様であるため説明を省略する。   Next, a second embodiment of the present invention will be described. The perspective view of the lithium secondary battery 1 according to the second embodiment of the present invention is the same as FIG. FIG. 5 is a partial cross-sectional view of the positive electrode terminal 4 according to the second embodiment of the present invention, taken along the line A1-A2 of FIG. Referring to FIG. 5, the positive terminal 4 includes a terminal upper part 10 and a terminal lower part 13. The second embodiment of the present invention differs from the first embodiment in the configuration of the terminal lower portion 13. Since the configuration and manufacturing method related to the terminal upper part 10 and other lithium secondary batteries 1 are the same as those in the first embodiment, the description thereof is omitted.

端子下部１３は、第１の実施の形態の端子下部１２と同様に、電池内部８に含まれる充放電部の正極と接続する。端子下部１３は、正極との接触抵抗を低減すること及び電池内部８の非水電解液と反応しないことを満たす材料から形成される。正極はアルミニウムによって形成されるため、端子下部１３もアルミニウムから形成されることが好ましい。尚、端子上部１０と端子下部１３とは、第１の実施の形態と同様に、摩擦圧接、電子ビーム溶接など、接触抵抗を低減し、境界面１８の強度が強い溶接によって接合される。また、境界面１８は、異種金属の接触に基づく腐食を防ぐために、樹脂部材６によって覆われる。   The terminal lower portion 13 is connected to the positive electrode of the charging / discharging unit included in the battery interior 8 in the same manner as the terminal lower portion 12 of the first embodiment. The lower terminal portion 13 is formed of a material that satisfies the requirement of reducing the contact resistance with the positive electrode and not reacting with the non-aqueous electrolyte inside the battery 8. Since the positive electrode is made of aluminum, it is preferable that the lower terminal portion 13 is also made of aluminum. In addition, the terminal upper part 10 and the terminal lower part 13 are joined by welding which reduces contact resistance, such as friction welding and electron beam welding, and the strength of the boundary surface 18 is the same as that of 1st Embodiment. Further, the boundary surface 18 is covered with the resin member 6 in order to prevent corrosion due to the contact of different metals.

端子下部１３は、鍔部１３ａと、胴部１３ｂと、鍔部１３ｃと、鍔下部１３ｄと、接続部１３ｅとを含む。本発明の第２の実施の形態は、鍔部を複数有することが第１の実施の形態と異なる。   The terminal lower portion 13 includes a flange portion 13a, a trunk portion 13b, a flange portion 13c, a flange lower portion 13d, and a connection portion 13e. The second embodiment of the present invention is different from the first embodiment in having a plurality of flanges.

鍔部１３ａ及び鍔部１３ｃは、第１の実施の形態の鍔部１２ａと同様に、端子下部１３の側面から外側へ突出した部位である。鍔部１３ａ及び鍔部１３ｃの各々の機能及び形状は、鍔部１２ａと同様である。従って、鍔部１３ａ及び鍔部１３ｃの各々は、正極端子４と樹脂部材６との結合力を上げる効果と、電池内部８で発生したガス又は非水電解液を外部へ漏出させ難くする効果を奏する。つまり、正極端子４は、鍔部を複数有することでこれらの効果を一層向上させる。   The flange portion 13a and the flange portion 13c are portions that protrude outward from the side surface of the terminal lower portion 13, like the flange portion 12a of the first embodiment. The functions and shapes of the flange 13a and the flange 13c are the same as those of the flange 12a. Therefore, each of the flange portion 13a and the flange portion 13c has an effect of increasing the bonding force between the positive electrode terminal 4 and the resin member 6, and an effect of making it difficult to leak the gas generated in the battery interior 8 or the non-aqueous electrolyte to the outside. Play. That is, the positive electrode terminal 4 further improves these effects by having a plurality of flanges.

胴部１３ｂは、鍔部１３ａと鍔部１３ｃとの間の部位である。胴部１３ｂは、正極端子４への強度をもたらすこと及び正極端子４へ大電流を流せるようにすることから、端子上部１０と同じ太さ、形状であることが好ましい。   The trunk | drum 13b is a site | part between the collar part 13a and the collar part 13c. The body portion 13b preferably has the same thickness and shape as the terminal upper portion 10 in order to provide strength to the positive electrode terminal 4 and to allow a large current to flow to the positive electrode terminal 4.

鍔下部１３ｄは、鍔部１３ｃと接続部１３ｅとの中間に位置する部位である。鍔下部１３ｄは、胴部１３ｂと同様に、端子上部１０と同じ太さ、形状であることが好ましい。   The collar lower part 13d is a part located in the middle between the collar part 13c and the connection part 13e. The collar lower portion 13d preferably has the same thickness and shape as the terminal upper portion 10 like the trunk portion 13b.

接続部１３ｅは、電池内部８に含まれる充放電部の正極と接続する。接続部１３ｅと正極との接続方法は、周知の技術を用いることが出来る。従って、図５では、正極と接続している接続部１３ｅの部位は略して示されている。   The connection part 13e connects with the positive electrode of the charging / discharging part contained in the battery inside 8. FIG. A well-known technique can be used for the connection method of the connection part 13e and a positive electrode. Therefore, in FIG. 5, the site | part of the connection part 13e connected with the positive electrode is abbreviate | omitted.

尚、鍔部１３ａ、胴部１３ｂ、及び鍔部１３ｃは、端子上部１０と端子下部１３との境界面１８が電池内部８で発生したガス又は非水電解液に曝され難くするために、端子下部１３に含まれることが好ましいが、端子上部１０と同じ金属で端子上部１０に含まれるとしてもよい。また、鍔部１３ａ又は胴部１３ｂ又は鍔部１３ｃは、端子上部１０及び端子下部１３との接合体の境界面１８を含み、両方の金属から形成されてもよい。また、鍔部１３ａ及び鍔部１３ｃは、境界面１８の近傍に位置しているが、境界面１８から離れて配置されてもよい。また、図５は正極端子４としているが、負極端子５も同様の構成とすることも可能である。   Note that the flange portion 13a, the trunk portion 13b, and the flange portion 13c are arranged in order to make it difficult for the interface 18 between the terminal upper portion 10 and the terminal lower portion 13 to be exposed to the gas generated in the battery interior 8 or the non-aqueous electrolyte. Although it is preferable to be included in the lower portion 13, the same metal as the terminal upper portion 10 may be included in the terminal upper portion 10. Moreover, the collar part 13a or the trunk | drum 13b or the collar part 13c contains the boundary surface 18 of the conjugate | zygote with the terminal upper part 10 and the terminal lower part 13, and may be formed from both metals. Moreover, although the collar part 13a and the collar part 13c are located in the vicinity of the boundary surface 18, they may be arranged away from the boundary surface 18. Moreover, although FIG. 5 shows the positive electrode terminal 4, the negative electrode terminal 5 can also have the same configuration.

本発明の第２の実施の形態によるリチウム二次電池１の電池端子、即ち正極端子４又は負極端子５は、複数の鍔部を有することで、樹脂部材６との結合力を上げる効果と、電池内部８で発生したガス又は非水電解液を外部へ漏出させ難くする効果を一層向上させる。尚、鍔部を同様の方法で更に増やすことも可能である。   The battery terminal of the lithium secondary battery 1 according to the second embodiment of the present invention, that is, the positive electrode terminal 4 or the negative electrode terminal 5 has a plurality of flanges, thereby increasing the bonding force with the resin member 6; This further improves the effect of making it difficult for the gas generated in the battery inside 8 or the non-aqueous electrolyte to leak out. In addition, it is also possible to increase the collar part further by the same method.

次に、本発明の第３の実施の形態について説明する。図６は、本発明の第３の実施の形態によるリチウム二次電池１の斜視図である。図６を参照すると、リチウム二次電池１は、電池容器２と、電池蓋３と、正極端子４と、負極端子５と、樹脂部材６と、安全弁７とを具備する。本発明の第３の実施の形態は、正極端子４の端子上部１４及び負極端子５の端子上部２４の構成が第１及び第２の実施の形態と異なる。リチウム二次電池１に係るその他の構成及び製造方法は、第１及び第２の実施の形態と同様である。   Next, a third embodiment of the present invention will be described. FIG. 6 is a perspective view of a lithium secondary battery 1 according to the third embodiment of the present invention. Referring to FIG. 6, the lithium secondary battery 1 includes a battery container 2, a battery lid 3, a positive terminal 4, a negative terminal 5, a resin member 6, and a safety valve 7. The third embodiment of the present invention is different from the first and second embodiments in the configuration of the terminal upper portion 14 of the positive electrode terminal 4 and the terminal upper portion 24 of the negative electrode terminal 5. Other configurations and manufacturing methods relating to the lithium secondary battery 1 are the same as those in the first and second embodiments.

正極端子４は、電池容器２の内部に含まれる充放電部の正極と接続し、電池蓋３から突出する。負極端子５は、電池容器２の内部に含まれる充放電部の負極と接続し、電池蓋３から突出する。突出した正極端子４の端子上部１４及び負極端子５の端子上部２４は、外部接続するためのバスバーと接続するが、第１及び第２の実施の形態と異なり、おねじである。バスバーの接続部は、正極端子４及び負極端子５の形状に合わせて形成されるため、第３の実施の形態では、バスバーとの接続にはナット等のめねじ部を有する部品が用いられる。   The positive electrode terminal 4 is connected to the positive electrode of the charging / discharging unit included in the battery container 2 and protrudes from the battery lid 3. The negative electrode terminal 5 is connected to the negative electrode of the charge / discharge part included in the battery container 2 and protrudes from the battery lid 3. The protruding terminal upper portion 14 of the positive electrode terminal 4 and terminal upper portion 24 of the negative electrode terminal 5 are connected to a bus bar for external connection, but unlike the first and second embodiments, they are male screws. Since the connection portion of the bus bar is formed according to the shape of the positive electrode terminal 4 and the negative electrode terminal 5, in the third embodiment, a component having a female screw portion such as a nut is used for connection to the bus bar.

図７は、図６に示したリチウム二次電池１のＢ１−Ｂ２部分断面図である。図７を参照して、本発明の第３の実施の形態による正極端子４及び負極端子５の詳細を説明する。尚、電池容器２と電池蓋３とで覆われた電池内部８に含まれる正極、負極及び非水電解液を含む充放電部は、図２と同様に図示を省略する。   FIG. 7 is a B1-B2 partial cross-sectional view of the lithium secondary battery 1 shown in FIG. With reference to FIG. 7, the details of the positive terminal 4 and the negative terminal 5 according to the third embodiment of the present invention will be described. In addition, the charging / discharging part containing the positive electrode, the negative electrode, and the non-aqueous electrolyte contained in the battery inside 8 covered with the battery container 2 and the battery lid 3 is omitted in the same manner as in FIG.

正極端子４について説明する。正極端子４は、端子上部１４と、端子下部１２とを備える。端子上部１４は、第１及び第２の実施の形態による端子上部１０同様に、外部接続するためにバスバーが接続する部位である。端子上部１４は、第１及び第２の実施の形態と同様に、バスバーとの接触抵抗を小さく保つこと、バスバーとのねじ締結に耐えうる機械的強度を有すること及び汎用性が高いことを満たす材料で形成される。材料には、銅又は、真鍮などの銅を主原料とする合金が好ましい。尚、端子下部１２は、本発明の第１の実施の形態と同様であるため説明を省略する。   The positive electrode terminal 4 will be described. The positive terminal 4 includes a terminal upper part 14 and a terminal lower part 12. The terminal upper part 14 is a part to which a bus bar is connected for external connection, like the terminal upper part 10 according to the first and second embodiments. Similar to the first and second embodiments, the terminal upper portion 14 maintains a low contact resistance with the bus bar, has a mechanical strength that can withstand screw fastening with the bus bar, and satisfies high versatility. Formed of material. The material is preferably copper or an alloy mainly made of copper such as brass. Note that the terminal lower portion 12 is the same as that of the first embodiment of the present invention, and a description thereof will be omitted.

端子上部１４は、バスバーと結合するおねじである。端子上部１４は、ネジ台部１４ａと、ネジ部１４ｂとを含む。ネジ台部１４ａは、柱状に形成された部位であり、電池蓋３に形成された挿通孔から突出している。ネジ台部１４ａの柱状は、端子上部１０と同様に、円柱、楕円柱、多角柱を含む。ネジ台部１４ａの柱状は、ネジ部１４ｂを設けやすい効果と、薄板よりも強度に優れ折れ曲がり難い効果と、導電性に優れ大電流を流しやすい効果とを奏する。   The terminal upper part 14 is a male screw coupled to the bus bar. The terminal upper part 14 includes a screw base part 14a and a screw part 14b. The screw base part 14 a is a part formed in a columnar shape and protrudes from an insertion hole formed in the battery lid 3. The columnar shape of the screw base portion 14 a includes a cylinder, an elliptical column, and a polygonal column, like the terminal upper portion 10. The columnar shape of the screw base portion 14a has an effect that it is easy to provide the screw portion 14b, an effect that is superior in strength and is difficult to bend than a thin plate, and an effect that is excellent in conductivity and that allows a large current to easily flow.

ネジ部１４ｂは、ネジ台部１４ａの上に形成され、バスバーとナット等のめねじ部を有する部品で結合できるように、端子上部１４が突出する方向に形成された部位である。ネジ部１４ｂとバスバーとが結合したとき、ネジ台部１４ａのネジ部１４ｂが配置する平面はバスバーとの接触面となる。   The screw part 14b is a part formed on the screw base part 14a and formed in a direction in which the terminal upper part 14 protrudes so as to be coupled with a part having a female screw part such as a bus bar and a nut. When the screw part 14b and the bus bar are coupled, the plane on which the screw part 14b of the screw base part 14a is arranged becomes a contact surface with the bus bar.

次に、負極端子５について説明する。負極端子５は、端子上部２４と、端子下部２２とを備える。端子上部２４は、正極端子４と同様に、バスバーとナット等のめねじ部を有する部品が接続する。そして正極端子４と同様に、端子上部２４は、銅又は真鍮によって形成される。端子上部２４は、ネジ台部２４ａと、ネジ部２４ｂとを含む。ネジ台部２４ａは、前述したネジ台部１４ａと同様であり、ネジ部２４ｂは前述したネジ部１４ｂと同様である。尚、端子下部２２は、本発明の第１の実施の形態と同様であるため説明を省略する。   Next, the negative electrode terminal 5 will be described. The negative electrode terminal 5 includes a terminal upper part 24 and a terminal lower part 22. Similarly to the positive electrode terminal 4, the terminal upper portion 24 is connected to a bus bar and a component having a female thread portion such as a nut. And like the positive electrode terminal 4, the terminal upper part 24 is formed of copper or brass. The terminal upper portion 24 includes a screw base portion 24a and a screw portion 24b. The screw base portion 24a is the same as the screw base portion 14a described above, and the screw portion 24b is the same as the screw portion 14b described above. Note that the terminal lower portion 22 is the same as that of the first embodiment of the present invention, and a description thereof will be omitted.

本発明の第３の実施の形態によるリチウム二次電池１の電池端子、即ち正極端子４又は負極端子５は、端子上部１４及び端子上部２４がおねじであるため、ナット等のめねじ部を有する部品を用いてバスバーに適合させることが可能となる。   In the battery terminal of the lithium secondary battery 1 according to the third embodiment of the present invention, that is, the positive terminal 4 or the negative terminal 5, the terminal upper part 14 and the terminal upper part 24 are male screws, so It becomes possible to adapt to the bus bar by using the parts having.

本発明の第４の実施の形態について説明する。図８は、本発明の第４の実施の形態による正極端子４の斜視図である。図８を参照すると、正極端子４は、端子上部１０と、端子下部１２と、つまみ部１５とを備える。本発明の第４の実施の形態は、第１から第３の実施の形態に、つまみ部１５を更に備えるものである。つまみ部１５は、端子上部１０とバスバーとを締付け易くすることが出来る。つまみ部１５は平らな側面１５ａを含み、側面１５ａはスパナやモンキーレンチなどレンチによって挟むことが可能である。つまみ部１５がレンチで挟めることによって、端子上部１０とバスバーとは締付け易い効果が得られる。尚、つまみ部１５は、本発明の第３の実施の形態に含まれる場合、ネジ台部１４ａとネジ部１４ｂとの間に含まれる。また、負極端子５に含まれることも可能である。   A fourth embodiment of the present invention will be described. FIG. 8 is a perspective view of the positive electrode terminal 4 according to the fourth embodiment of the present invention. Referring to FIG. 8, the positive electrode terminal 4 includes a terminal upper part 10, a terminal lower part 12, and a knob part 15. The fourth embodiment of the present invention further includes a knob portion 15 in the first to third embodiments. The knob portion 15 can easily tighten the terminal upper portion 10 and the bus bar. The knob portion 15 includes a flat side surface 15a, and the side surface 15a can be sandwiched by a wrench such as a spanner or a monkey wrench. By pinching the knob portion 15 with a wrench, an effect that the terminal upper portion 10 and the bus bar are easily tightened can be obtained. When the knob portion 15 is included in the third embodiment of the present invention, it is included between the screw base portion 14a and the screw portion 14b. It can also be included in the negative electrode terminal 5.

本発明の第１から第４の実施の形態による正極端子４及び負極端子５の各々の端子上部と端子下部とを、任意の組み合わせで用いることが可能である。更に、任意の組み合わせで構成された正極端子４と負極端子５とを、任意に組み合わせてリチウム二次電池１を構成することも可能である。   The upper and lower terminal portions of the positive electrode terminal 4 and the negative electrode terminal 5 according to the first to fourth embodiments of the present invention can be used in any combination. Furthermore, the lithium secondary battery 1 can be configured by arbitrarily combining the positive electrode terminal 4 and the negative electrode terminal 5 configured in an arbitrary combination.

図１は、本発明の第１及び第２の実施の形態によるリチウム二次電池１の斜視図である。FIG. 1 is a perspective view of a lithium secondary battery 1 according to the first and second embodiments of the present invention. 図２は、図１に示したリチウム二次電池１のＡ１−Ａ２部分断面図である。2 is an A1-A2 partial cross-sectional view of the lithium secondary battery 1 shown in FIG. 図３は、本発明の第１の実施の形態による正極端子４を示した斜視図である。FIG. 3 is a perspective view showing the positive terminal 4 according to the first embodiment of the present invention. 図４は、図２に示した正極端子４の拡大図である。FIG. 4 is an enlarged view of the positive electrode terminal 4 shown in FIG. 図５は、本発明の第２の実施の形態による正極端子４の図１のＡ１−Ａ２部分断面図である。FIG. 5 is a partial cross-sectional view of the positive electrode terminal 4 according to the second embodiment of the present invention, taken along the line A1-A2 of FIG. 図６は、本発明の第３の実施の形態によるリチウム二次電池１の斜視図である。FIG. 6 is a perspective view of a lithium secondary battery 1 according to the third embodiment of the present invention. 図７は、図６に示したリチウム二次電池１のＢ１−Ｂ２部分断面図である。FIG. 7 is a B1-B2 partial cross-sectional view of the lithium secondary battery 1 shown in FIG. 図８は、本発明の第４の実施の形態による正極端子４の斜視図である。FIG. 8 is a perspective view of the positive electrode terminal 4 according to the fourth embodiment of the present invention.

符号の説明Explanation of symbols

１ 二次電池
２ 電池容器
３ 電池蓋
４ 正極端子
５ 負極端子
６ 樹脂部材
７ 安全弁
８ 電池内部
１０ 端子上部（第一端子部材）
１１ 境界面
１２ 端子下部（第二端子部材）
１２ａ 鍔部
１２ｂ 鍔下部
１２ｃ 接続部
１３ 端子下部（第二端子部材）
１３ａ 鍔部
１３ｂ 胴部
１３ｃ 鍔部
１３ｄ 鍔下部
１３ｅ 接続部
１４ 端子上部（第一端子部材）
１４ａ ネジ台部
１４ｂ ネジ部
１５ つまみ部
１５ａ 側面
１８ 境界面
２０ 端子上部（第一端子部材）
２１ 境界面
２２ 端子下部（第二端子部材）
２２ａ 鍔部
２２ｂ 鍔下部
２２ｃ 接続部
２４ 端子上部（第一端子部材）
２４ａ ネジ台部
２４ｂ ネジ部
３０ 漏出経路 DESCRIPTION OF SYMBOLS 1 Secondary battery 2 Battery container 3 Battery cover 4 Positive electrode terminal 5 Negative electrode terminal 6 Resin member 7 Safety valve 8 Battery inside 10 Terminal upper part (1st terminal member)
11 Interface 12 Lower terminal (second terminal member)
12a collar part 12b collar lower part 12c connection part 13 terminal lower part (second terminal member)
13a collar part 13b trunk part 13c collar part 13d collar lower part 13e connection part 14 terminal upper part (first terminal member)
14a Screw base part 14b Screw part 15 Knob part 15a Side face 18 Boundary face 20 Terminal upper part (first terminal member)
21 Interface 22 Lower terminal (second terminal member)
22a collar part 22b collar lower part 22c connection part 24 terminal upper part (first terminal member)
24a Screw base part 24b Screw part 30 Leakage path

Claims (14)

柱状の第１端子部材と、
前記第１端子部材と接合する柱状の第２端子部材と、
前記第１端子部材及び前記第２端子部材のうちの少なくとも一方の側面から外側へ突出する鍔部と
を具備する
電池端子。 A columnar first terminal member;
A columnar second terminal member joined to the first terminal member;
A battery terminal comprising: a flange that protrudes outward from at least one side surface of the first terminal member and the second terminal member. 請求項１に記載の電池端子であって、
前記第１端子部材は、銅又は真鍮から形成される
電池端子。 The battery terminal according to claim 1,
The first terminal member is a battery terminal formed of copper or brass. 請求項２に記載の電池端子であって、
前記第２端子部材は、アルミニウム又は銅から形成される
電池端子。 The battery terminal according to claim 2,
The second terminal member is a battery terminal formed of aluminum or copper. 請求項３に記載の電池端子であって、
前記鍔部は、前記第２端子部材の側面から外側へ突出する
電池端子。 The battery terminal according to claim 3,
The flange part protrudes outward from the side surface of the second terminal member. 請求項４に記載の電池端子であって、
前記鍔部は、前記第２端子部材の側面から外側へ円形且つ面状に突出する
電池端子。 The battery terminal according to claim 4,
The collar part projects in a circular and planar shape from the side surface of the second terminal member to the outside. 請求項１乃至５の何れか一項に記載の電池端子であって、
前記第１端子部材は、めねじ又はおねじである
電池端子。 The battery terminal according to any one of claims 1 to 5,
The first terminal member is a female screw or a male screw. 請求項１乃至６の何れか一項に記載の電池端子と、
挿通孔を有する電池蓋と、
前記挿通孔を挿通する前記電池端子と前記電池蓋とを、前記鍔部を覆い前記挿通孔を塞ぐように結合する樹脂部材と、
前記電池蓋が結合する電池容器と
を具備し、
前記電池端子は、前記第１端子部材が前記電池容器から突出し、前記第２端子部材が前記電池容器の内側に含まれる
二次電池。 The battery terminal according to any one of claims 1 to 6,
A battery lid having an insertion hole;
A resin member that connects the battery terminal and the battery lid that are inserted through the insertion hole so as to cover the flange and close the insertion hole;
A battery container to which the battery lid is coupled,
In the battery terminal, the first terminal member protrudes from the battery container, and the second terminal member is included inside the battery container. 第１金属材料と、第２金属材料とを摩擦圧接で接合する工程と、
前記第１金属材料と前記第２金属材料との接合体を、鍔部を有する柱状の電池端子へ加工する工程と
を具備し、前記電池端子は、前記第１金属部材から形成される第１端子部材と、前記第２金属部材から形成される第２端子部材と、前記第１端子部材及び前記第２端子部材のうちの少なくとも一方の側面から外側へ突出する前記鍔部とを含む
電池端子の製造方法。 Joining the first metal material and the second metal material by friction welding;
Processing the joined body of the first metal material and the second metal material into a columnar battery terminal having a flange, wherein the battery terminal is formed from the first metal member. A battery terminal comprising: a terminal member; a second terminal member formed from the second metal member; and the flange protruding outward from at least one side surface of the first terminal member and the second terminal member. Manufacturing method. 請求項８に記載の電池端子の製造方法であって、
前記第１金属材料は、銅又は真鍮を含む
電池端子の製造方法。 It is a manufacturing method of the battery terminal according to claim 8,
The first metal material includes copper or brass. 請求項９に記載の電池端子の製造方法であって、
前記第２金属材料は、アルミニウム又は銅を含む
電池端子の製造方法。 The battery terminal manufacturing method according to claim 9,
The method of manufacturing a battery terminal, wherein the second metal material includes aluminum or copper. 請求項１０に記載の電池端子の製造方法であって、
前記鍔部は、前記第２端子部材の側面から外側へ突出する
電池端子の製造方法。 It is a manufacturing method of the battery terminal according to claim 10,
The said collar part protrudes outside from the side surface of the said 2nd terminal member. The manufacturing method of a battery terminal. 請求項１１に記載の電池端子の製造方法であって、
前記鍔部は、前記第２端子部材の側面から外側へ円形且つ面状に突出する
電池端子の製造方法。 It is a manufacturing method of the battery terminal according to claim 11,
The said collar part protrudes circularly and planarly from the side surface of the said 2nd terminal member to the outer side, The manufacturing method of a battery terminal. 請求項８乃至１２の何れか一項に記載の電池端子の製造方法であって、
前記第１端子部材をおねじ又はめねじに加工する工程
を更に具備する
電池端子の製造方法。 A method of manufacturing a battery terminal according to any one of claims 8 to 12,
The battery terminal manufacturing method further comprising a step of processing the first terminal member into a male screw or a female screw. 請求項８乃至１３の何れか一項に記載の電池端子の製造方法に基づいて、前記電池端子を製造する工程と、
前記電池端子と挿通孔を有する前記電池蓋とを、前記鍔部を覆い前記挿通孔を塞ぐように樹脂部材で結合する工程と、
前記電池端子が結合した前記電池蓋を、前記第１端子部材が電池容器から突出し、前記第２端子部材が前記電池容器の内側に含まれるように前記電池容器に結合する工程と
を具備する
二次電池の製造方法。 A step of manufacturing the battery terminal based on the method of manufacturing a battery terminal according to any one of claims 8 to 13,
The battery terminal and the battery lid having an insertion hole are coupled with a resin member so as to cover the flange and close the insertion hole;
The battery lid to which the battery terminal is coupled includes a step of coupling the battery lid to the battery container so that the first terminal member protrudes from the battery container and the second terminal member is included inside the battery container. A method for manufacturing a secondary battery.
JP2008266571A 2008-10-15 2008-10-15 Battery terminal, secondary battery, method for manufacturing battery terminal, and method for manufacturing secondary battery Pending JP2010097769A (en)

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JP2011192550A (en) * 2010-03-15 2011-09-29 Shin Kobe Electric Mach Co Ltd Secondary battery
US9065098B2 (en) 2010-03-15 2015-06-23 Shin-Kobe Electric Machinery Co., Ltd. Secondary battery
US9627676B2 (en) 2011-03-30 2017-04-18 Hitachi Metals, Ltd. Negative electrode terminal and cover member for lithium ion battery, and lithium ion battery
WO2012133654A1 (en) * 2011-03-30 2012-10-04 株式会社Ｎｅｏｍａｘマテリアル Negative electrode terminal and cover member for lithium ion batteries, and lithium ion battery
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JP2013055020A (en) * 2011-09-06 2013-03-21 Toshiba Corp Battery and battery pack
JP2014229564A (en) * 2013-05-24 2014-12-08 株式会社豊田自動織機 Power storage device module
JP2016192322A (en) * 2015-03-31 2016-11-10 三洋電機株式会社 Secondary battery, and battery pack
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CN112243548A (en) * 2018-09-21 2021-01-19 株式会社东芝 Battery, battery pack, battery module, power storage device, vehicle, and flying object

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