JP2016096096A - Lead member and battery - Google Patents

Lead member and battery Download PDF

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JP2016096096A
JP2016096096A JP2014232418A JP2014232418A JP2016096096A JP 2016096096 A JP2016096096 A JP 2016096096A JP 2014232418 A JP2014232418 A JP 2014232418A JP 2014232418 A JP2014232418 A JP 2014232418A JP 2016096096 A JP2016096096 A JP 2016096096A
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lead member
resin film
insulating resin
metal
seam
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JP6413682B2 (en
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圭太郎 宮澤
Keitaro Miyazawa
圭太郎 宮澤
聡 岡野
Satoshi Okano
聡 岡野
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Sumitomo Electric Industries Ltd
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Sumitomo Electric Industries Ltd
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Priority to CN201510789193.8A priority patent/CN105609694A/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/534—Electrode connections inside a battery casing characterised by the material of the leads or tabs
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/04—Hybrid capacitors
    • H01G11/06—Hybrid capacitors with one of the electrodes allowing ions to be reversibly doped thereinto, e.g. lithium ion capacitors [LIC]
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/74—Terminals, e.g. extensions of current collectors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/552—Terminals characterised by their shape
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/571—Methods or arrangements for affording protection against corrosion; Selection of materials therefor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Abstract

PROBLEM TO BE SOLVED: To provide a lead member which enhances the bonding strength of dissimilar metals each other.SOLUTION: In a lead member 3 where insulation resin films 5 are bonded from the opposite surfaces of a flat conductor 4, where a first metal 11 and a second metal 13 dissimilar thereto are bonded, the seam S1 of the first metal 11 and second metal 13 is linear on the first face 4c and second face 4d of the flat conductor 4, and the seam S1 of the first face 4c and the seam S1 of the second face 4d are arranged at the same distance from at least one end 4e of the flat conductor 4 in the length direction. In the side faces 4f, 4h, the seam S1 is formed in sawtooth shape. The insulation resin films 5 are arranged so that the opposite ends of the flat conductor 4 are exposed in the length direction, and protrude outward while covering at least the first metal 11 in the width direction, and the portions of the insulation resin films 5 protruding outward are bonded to each other.SELECTED DRAWING: Figure 3

Description

本発明は、電池から電気を取り出す端子として用いられるアルミニウム箔からなるリード部材および該リード部材を用いた電池に関する。   The present invention relates to a lead member made of an aluminum foil used as a terminal for taking out electricity from a battery, and a battery using the lead member.

アルミニウム箔からなるリード部材は、例えば、リチウムイオン電池やリチウムイオンキャパシタ等の電池の正極側のリード部材として使用されている。このリード部材は、アルミニウム箔からなる長方形状の平形導体の中央部分の両面を絶縁樹脂フィルムで覆い、この絶縁樹脂フィルム部分を電池の封入体で密封封止して、電気を外部に取り出すようにしている。   Lead members made of aluminum foil are used as lead members on the positive electrode side of batteries such as lithium ion batteries and lithium ion capacitors, for example. In this lead member, both sides of the central portion of a rectangular flat conductor made of aluminum foil are covered with an insulating resin film, and this insulating resin film portion is hermetically sealed with a battery enclosure to take out electricity. ing.

このようなアルミニウム箔からなるリード部材は、半田付けによる簡易な電気接続ができない。また、所望の電圧を得るために複数の非水電解質デバイスを直列接続して使用する場合がある。この場合、アルミニウム箔のリードと銅箔のリードを電気的に接触させて接続するが、接触部に結露等による水分が付着すると、異種金属間で局部電池が形成され、イオン化傾向の大きい方の金属が腐食するという問題がある。これらの問題を改善するために、例えば、特許文献１は、アルミニウム箔のリードに冷間圧接により銅箔のリードを接合したリード部材を開示している。   Such a lead member made of an aluminum foil cannot be simply connected by soldering. In some cases, a plurality of nonaqueous electrolyte devices are connected in series to obtain a desired voltage. In this case, the lead of the aluminum foil and the lead of the copper foil are electrically connected to each other, but when moisture due to condensation adheres to the contact part, a local battery is formed between different metals, and the ionization tendency is larger. There is a problem that the metal corrodes. In order to improve these problems, for example, Patent Document 1 discloses a lead member in which a copper foil lead is joined to an aluminum foil lead by cold welding.

特開２０１１−２４３５３１号公報Japanese Unexamined Patent Publication No. 2011-243531

特許文献１に記載のように、異種金属同士を接合すると、接合箇所の機械的強度が弱く、切断されやすい。また、アルミニウム箔と銅箔とを重ねて溶接すると、リード部材の表面と裏面とで継ぎ目ラインがずれる。そのため、その部分を覆う絶縁樹脂フィルムの長さを長くする必要があり、電池サイズが大きくなる。   As described in Patent Document 1, when dissimilar metals are bonded to each other, the mechanical strength of the bonded portion is weak and easily cut. Further, when the aluminum foil and the copper foil are overlapped and welded, the seam line is shifted between the front surface and the back surface of the lead member. Therefore, it is necessary to lengthen the length of the insulating resin film covering the portion, and the battery size increases.

本発明は、異種金属同士の接合強度が向上したリード部材とこれを用いた電池の提供を目的とする。   An object of the present invention is to provide a lead member with improved bonding strength between different metals and a battery using the lead member.

本発明によるリード部材は、
第一の金属と前記第一の金属とは異種の第二の金属とが接合された平形導体の両面から絶縁樹脂フィルムが貼り合わされたリード部材であって、
前記平形導体は、主表面である第一面と、前記第一面の裏面である第二面と、前記第一面および前記第二面の四方を囲む側面と、を備え、
前記第一の金属と前記第二の金属との継ぎ目は前記第一面および前記第二面において直線であり、
前記継ぎ目と平行な方向を幅方向とし、前記幅方向と垂直の方向を長さ方向としたときに、前記第一面の継ぎ目と前記第二面の継ぎ目は、前記平形導体の前記長さ方向の少なくとも一方の端部から同じ距離に配置され、
前記側面のうち前記継ぎ目を含む二面のそれぞれにおいて、前記継ぎ目は鋸歯状に形成され、
前記絶縁樹脂フィルムは、前記長さ方向において前記平形導体の両端部が露出され、前記幅方向において少なくとも前記第一の金属を覆って外方にはみ出るように配置され、前記絶縁樹脂フィルムの外方にはみ出した部分が互いに貼り合わされている。 The lead member according to the present invention is
A lead member in which an insulating resin film is bonded from both sides of a flat conductor in which a first metal and the first metal are bonded to a different second metal,
The flat conductor includes a first surface that is a main surface, a second surface that is a back surface of the first surface, and side surfaces that surround four sides of the first surface and the second surface,
The seam between the first metal and the second metal is a straight line on the first surface and the second surface;
When the direction parallel to the seam is the width direction and the direction perpendicular to the width direction is the length direction, the seam of the first surface and the seam of the second surface are the length direction of the flat conductor. Arranged at the same distance from at least one end of
In each of the two surfaces including the seam among the side surfaces, the seam is formed in a sawtooth shape,
The insulating resin film is disposed so that both end portions of the flat conductor are exposed in the length direction and protrudes outwardly covering at least the first metal in the width direction. The protruding parts are pasted together.

また、本発明による電池は、
上記に記載のリード部材を有する非水電解質デバイスであって、
発電素子が包材内に収容され、
前記リード部材が前記発電素子の電極と接続され、
前記第二の金属と前記絶縁樹脂フィルムの前記長さ方向の一端が前記包材の外側に配置され、
前記第一の金属と前記絶縁樹脂フィルムの前記長さ方向の他端が前記包材の内側に配置されている。 The battery according to the present invention is
A non-aqueous electrolyte device having the lead member described above,
The power generation element is contained in the packaging material,
The lead member is connected to an electrode of the power generation element;
One end in the length direction of the second metal and the insulating resin film is disposed outside the packaging material,
The other ends in the length direction of the first metal and the insulating resin film are disposed inside the packaging material.

本発明によれば、異種金属同士の接合強度が向上したリード部材とこれを用いた電池を提供することができる。   According to the present invention, it is possible to provide a lead member with improved bonding strength between different metals and a battery using the lead member.

本発明によるリード部材の使用形態の一例を示す図であり、（Ａ）は、非水電解質電池の外観を示し、（Ｂ）はリード部材の封着状態を示す。It is a figure which shows an example of the usage condition of the lead member by this invention, (A) shows the external appearance of a nonaqueous electrolyte battery, (B) shows the sealing state of a lead member. リード部材の構造の概略を説明する図であり、（Ａ）は正極側のリード部材の一例を示し、（Ｂ）は負極側のリード部材の一例を示す。It is a figure explaining the outline of the structure of a lead member, (A) shows an example of the lead member on the positive electrode side, (B) shows an example of the lead member on the negative electrode side. （Ａ）は、絶縁樹脂フィルムが貼り付けられる前の正極側のリード部材の斜視図であり、（Ｂ）は、（Ａ）のＢ部分拡大図である。(A) is a perspective view of the lead member on the positive electrode side before the insulating resin film is attached, and (B) is an enlarged view of a portion B of (A). （Ａ）は、変形例１に係る正極側リード部材の構造を説明する図であり、（Ｂ）は、変形例１に係る負極側リード部材の構造を説明する図である。(A) is a figure explaining the structure of the positive electrode side lead member which concerns on the modification 1, (B) is a figure explaining the structure of the negative electrode side lead member which concerns on the modification 1. FIG. （Ａ）は、変形例２に係る正極側リード部材の構造を説明する図であり、（Ｂ）は、変形例２に係る負極側リード部材の構造を説明する図である。(A) is a figure explaining the structure of the positive electrode side lead member which concerns on the modification 2, (B) is a figure explaining the structure of the negative electrode side lead member which concerns on the modification 2. FIG.

〈本発明の実施形態の概要〉
最初に本発明の実施形態の概要を説明する。
本発明にかかるリード部材の一実施形態は、
（１）第一の金属と前記第一の金属とは異種の第二の金属とが接合された平形導体の両面から絶縁樹脂フィルムが貼り合わされたリード部材であって、
前記平形導体は、主表面である第一面と、前記第一面の裏面である第二面と、前記第一面および前記第二面の四方を囲む側面と、を備え、
前記第一の金属と前記第二の金属との継ぎ目は前記第一面および前記第二面において直線であり、
前記継ぎ目と平行な方向を幅方向とし、前記幅方向と垂直の方向を長さ方向としたときに、前記第一面の継ぎ目と前記第二面の継ぎ目は、前記平形導体の前記長さ方向の少なくとも一方の端部から同じ距離に配置され、
前記側面のうち前記継ぎ目を含む二面のそれぞれにおいて、前記継ぎ目は鋸歯状に形成され、
前記絶縁樹脂フィルムは、前記長さ方向において前記平形導体の両端部が露出され、前記幅方向において少なくとも前記第一の金属を覆って外方にはみ出るように配置され、前記絶縁樹脂フィルムの外方にはみ出した部分が互いに貼り合わされている。
この構成によれば、異種金属同士の接合強度が向上したリード部材を提供することができる。 <Outline of Embodiment of the Present Invention>
First, an outline of an embodiment of the present invention will be described.
One embodiment of the lead member according to the present invention is:
(1) A lead member in which an insulating resin film is bonded from both sides of a flat conductor in which a first metal and the first metal are bonded to a different second metal,
The flat conductor includes a first surface that is a main surface, a second surface that is a back surface of the first surface, and side surfaces that surround four sides of the first surface and the second surface,
The seam between the first metal and the second metal is a straight line on the first surface and the second surface;
When the direction parallel to the seam is the width direction and the direction perpendicular to the width direction is the length direction, the seam of the first surface and the seam of the second surface are the length direction of the flat conductor. Arranged at the same distance from at least one end of
In each of the two surfaces including the seam among the side surfaces, the seam is formed in a sawtooth shape,
The insulating resin film is disposed so that both end portions of the flat conductor are exposed in the length direction and protrudes outwardly covering at least the first metal in the width direction. The protruding parts are pasted together.
According to this configuration, it is possible to provide a lead member having improved bonding strength between different metals.

（２）前記継ぎ目は、前記絶縁樹脂フィルムの外側であって、前記絶縁樹脂フィルムの前記継ぎ目側の端部から２ｍｍ以上離れた位置にあってもよい。
この構成によれば、耐電解液性に優れたリード部材を提供することができる。 (2) The seam may be outside the insulating resin film and at a position 2 mm or more away from an end of the insulating resin film on the seam side.
According to this configuration, it is possible to provide a lead member that is excellent in electrolytic solution resistance.

（３）前記継ぎ目は、前記絶縁樹脂フィルムの内側であって、前記絶縁樹脂フィルムの前記継ぎ目側の端部から２ｍｍ以内の位置にあってもよい。
（４）前記継ぎ目は、前記絶縁樹脂フィルムの前記幅方向に沿った中心線から１ｍｍ以内の位置にあってもよい。
この構成によれば、耐電解液性だけでなく、大気中での耐食性および振動耐性に優れたリード部材を提供することができる。 (3) The joint may be located inside the insulating resin film and at a position within 2 mm from an end of the insulating resin film on the joint side.
(4) The seam may be at a position within 1 mm from a center line along the width direction of the insulating resin film.
According to this configuration, it is possible to provide a lead member that is excellent not only in electrolytic solution resistance but also in corrosion resistance and vibration resistance in the air.

本発明にかかる電池の一実施形態は、
（５）（１）〜（４）のいずれかに記載のリード部材を有する電池であって、
発電素子が包材内に収容され、
前記リード部材が前記発電素子の電極と接続され、
前記第二の金属と前記絶縁樹脂フィルムの前記長さ方向の一端が前記包材の外側に配置され、
前記第一の金属と前記絶縁樹脂フィルムの前記長さ方向の他端が前記包材の内側に配置されている。
この構成によれば、異種金属同士の接合強度が向上したリード部材を備えつつ小型化された電池を提供することができる。 One embodiment of the battery according to the present invention is:
(5) A battery having the lead member according to any one of (1) to (4),
The power generation element is contained in the packaging material,
The lead member is connected to an electrode of the power generation element;
One end in the length direction of the second metal and the insulating resin film is disposed outside the packaging material,
The other ends in the length direction of the first metal and the insulating resin film are disposed inside the packaging material.
According to this configuration, it is possible to provide a battery that is miniaturized while including the lead member having improved bonding strength between different metals.

〈本発明の実施形態の詳細〉
以下、本発明に係るリード部材および電池の実施の形態の例を、図面を参照して説明する。なお、本発明はこれらの例示に限定されるものではなく、特許請求の範囲によって示され、特許請求の範囲と均等の意味および範囲内でのすべての変更が含まれることが意図される。 <Details of Embodiment of the Present Invention>
Examples of embodiments of a lead member and a battery according to the present invention will be described below with reference to the drawings. In addition, this invention is not limited to these illustrations, is shown by the claim, and intends that all the changes within the meaning and range equivalent to a claim are included.

図１および２を参照して、本発明によるリード部材の概略とその使用形態を説明する。図１（Ａ）は、非水電解質電池の外観を示す図、図１（Ｂ）はリード部材の封着状態を示す図、図２（Ａ）は正極側のリード部材の一例を示す図、図２（Ｂ）は負極側のリード部材の一例を示す図である。   With reference to FIG. 1 and 2, the outline of the lead member by this invention and its usage form are demonstrated. FIG. 1A is a diagram showing an external appearance of a nonaqueous electrolyte battery, FIG. 1B is a diagram showing a sealed state of a lead member, and FIG. 2A is a diagram showing an example of a lead member on the positive electrode side, FIG. 2B is a diagram illustrating an example of a negative electrode lead member.

図１（Ａ）に示すように、非水電解質電池１は、金属箔を含む多層フィルムからなる封入体２（包材の一例）を備えている。封入体２は、図示省略するが、正極板と負極板とをセパレータを介して積層した積層電極群（発電素子の一例）と電解液を収納している。正極板にはリード部材３が接続され、負極板にはリード部材３’が接続されている。リード部材３およびリード部材３’は、絶縁樹脂フィルム５を介して封入体２のシール部６から密封封止した状態で取り出される。   As shown in FIG. 1A, the nonaqueous electrolyte battery 1 includes an enclosure 2 (an example of a packaging material) made of a multilayer film including a metal foil. Although not shown, the enclosure 2 contains a laminated electrode group (an example of a power generation element) in which a positive electrode plate and a negative electrode plate are laminated via a separator, and an electrolytic solution. A lead member 3 is connected to the positive electrode plate, and a lead member 3 'is connected to the negative electrode plate. The lead member 3 and the lead member 3 ′ are taken out in a state of being hermetically sealed from the seal portion 6 of the enclosure 2 through the insulating resin film 5.

封入体２は、非水電解質電池１の外装ケースとなるもので、例えば、矩形状の２枚の多層フィルム周辺のシール部６を、熱溶着によりシールすることにより密封される。封入体２に用いられる多層フィルムは、後述するように、少なくとも金属箔の両面に樹脂フィルムを貼り合わせて形成される。リード部材３，３’には、絶縁樹脂フィルム５が予め熱溶着により接合されている。この絶縁樹脂フィルム５と封入体２の多層フィルムとが熱融着されてリード部材３，３’と多層フィルムとが密封される。   The enclosure 2 serves as an outer case of the non-aqueous electrolyte battery 1 and is sealed by, for example, sealing the sealing portions 6 around the two rectangular multilayer films by heat welding. The multilayer film used for the enclosure 2 is formed by bonding resin films on at least both surfaces of the metal foil, as will be described later. An insulating resin film 5 is previously bonded to the lead members 3 and 3 'by heat welding. The insulating resin film 5 and the multilayer film of the enclosure 2 are heat-sealed to seal the lead members 3 and 3 ′ and the multilayer film.

図１（Ｂ）に示すように、封入体２は、少なくとも３層の積層体である多層フィルム２ａ〜２ｃから構成されている。最内層フィルム２ａは、電解液で溶解されずシール部６から電解液が漏出するのを防止するのに適したものとしてポリオレフィン樹脂（例：無水マレイン酸変性低密度ポリエチレンまたはポリプロピレン）が用いられる。金属箔層２ｂは、アルミニウム、銅、ステンレス等の金属箔が用いられ、電解液に対する密封性を高めている。最外層フィルム２ｃは、ポリエチレンテレフタレート（ＰＥＴ）等で形成され、薄い金属箔層２ｂを保護している。   As shown in FIG. 1 (B), the enclosure 2 is composed of multilayer films 2a to 2c that are laminates of at least three layers. For the innermost layer film 2a, a polyolefin resin (eg, maleic anhydride-modified low-density polyethylene or polypropylene) is used as a material suitable for preventing the electrolyte solution from leaking from the seal portion 6 without being dissolved by the electrolyte solution. The metal foil layer 2b is made of a metal foil such as aluminum, copper, or stainless steel, and enhances the sealing performance against the electrolytic solution. The outermost layer film 2c is formed of polyethylene terephthalate (PET) or the like and protects the thin metal foil layer 2b.

図２（Ａ）および（Ｂ）に示されるように、リード部材３，３’は、薄い導体箔が長方形状にカットされた平形導体４，４’として構成されている。平形導体４，４’の封入体２からの取り出し部分には、絶縁樹脂フィルム５が貼り付けられている。絶縁樹脂フィルム５は、平形導体４，４’の両面に位置を合わせて貼り合わされる。絶縁樹脂フィルム５は、平形導体４，４’の長さ（図２の縦方向）より短く、平形導体４の幅（図２の横方向）より広いものが用いられる。なお、本実施形態においては、後述の継ぎ目Ｓ１，Ｓ２と平行な方向を幅方向とし、幅方向と垂直の方向を長さ方向としている。   As shown in FIGS. 2A and 2B, the lead members 3 and 3 ′ are configured as flat conductors 4 and 4 ′ in which a thin conductor foil is cut into a rectangular shape. An insulating resin film 5 is attached to a portion where the flat conductors 4 and 4 ′ are taken out from the enclosure 2. The insulating resin film 5 is bonded to both sides of the flat conductors 4 and 4 ′ in alignment. The insulating resin film 5 is shorter than the length of the flat conductors 4 and 4 '(vertical direction in FIG. 2) and wider than the width of the flat conductor 4 (horizontal direction in FIG. 2). In the present embodiment, a direction parallel to seams S1 and S2, which will be described later, is a width direction, and a direction perpendicular to the width direction is a length direction.

なお、非水電解質電池１として、携帯電話、ノートパソコン、携帯音楽プレーヤ等の機器に搭載される小型のものと、電気自動車用のバッテリー等の大型のものがある。リード部材３，３’の平形導体４，４’は、上記の電池の形状や容量により異なるが、厚さが０.１ｍｍ〜０.４ｍｍ、長さ（縦方向）が２０ｍｍ〜７０ｍｍ、幅（横方向）が１ｍｍ〜９０ｍｍである。平形導体４，４’は、縦方向の長さより横幅の方が大きい場合もある。絶縁樹脂フィルム５は、厚さが７０μｍ〜１５０μｍ、長さ（縦方向）が１０ｍｍ〜２０ｍｍ、横幅は平形導体４，４’の幅よりも１ｍｍ〜１０ｍｍ程度大きいものが用いられる。   The nonaqueous electrolyte battery 1 includes a small battery mounted on a device such as a mobile phone, a notebook computer, and a portable music player, and a large battery such as a battery for an electric vehicle. The flat conductors 4 and 4 ′ of the lead members 3 and 3 ′ differ depending on the shape and capacity of the battery, but the thickness is 0.1 mm to 0.4 mm, the length (vertical direction) is 20 mm to 70 mm, and the width ( (Lateral direction) is 1 mm to 90 mm. The flat conductors 4 and 4 ′ may have a larger width than the length in the vertical direction. The insulating resin film 5 has a thickness of 70 μm to 150 μm, a length (longitudinal direction) of 10 mm to 20 mm, and a lateral width that is 1 mm to 10 mm larger than the width of the flat conductors 4 and 4 ′.

リード部材３，３’は、平形導体４，４’の長さ方向の両端を除く部分（中間部分）を絶縁樹脂フィルム５で覆い、平形導体４，４’の上端部４ａと下端部４ｂとを露出させて構成される。上端部４ａは、封入体２から外側に露出され外部装置等への接続端子となり、下端部４ｂは、封入体２内で電池の電極板リード７との接続部となる。   The lead members 3 and 3 ′ cover portions (intermediate portions) excluding both ends in the length direction of the flat conductors 4 and 4 ′ with an insulating resin film 5, and the upper end portions 4 a and lower end portions 4 b of the flat conductors 4 and 4 ′ It is composed by exposing. The upper end portion 4a is exposed to the outside from the enclosure 2 and serves as a connection terminal to an external device, and the lower end portion 4b serves as a connection portion with the electrode plate lead 7 of the battery in the enclosure 2.

図１（Ｂ）および図２（Ａ）に示すように、正極側のリード部材３の平形導体４は、下端部４ｂ側のアルミニウム箔１１に上端部４ａ側の銅箔１３が接合されて形成されている。正極側のリード部材３には高い電位がかかるため、電極板リード７と接続される下端部４ｂには、高電位で電解液に溶解しないアルミニウム箔１１が用いられる。なお、アルミニウム箔１１と銅箔１３の接合は、特許第５２５４４９３号に開示された方法に従って、固相接合にて行われる。   As shown in FIGS. 1 (B) and 2 (A), the flat conductor 4 of the lead member 3 on the positive electrode side is formed by joining the copper foil 13 on the upper end 4a side to the aluminum foil 11 on the lower end 4b side. Has been. Since a high potential is applied to the lead member 3 on the positive electrode side, an aluminum foil 11 that does not dissolve in the electrolytic solution at a high potential is used for the lower end portion 4 b connected to the electrode plate lead 7. In addition, joining of the aluminum foil 11 and the copper foil 13 is performed by solid phase joining according to the method disclosed in Japanese Patent No. 5254493.

図２（Ａ）および図３（Ａ）に示すように、正極側のリード部材３の平形導体４は、第一面４ｃと、第一面４ｃの裏面側の第二面４ｄと、第一面４ｃおよび第二面４ｄの四方を囲む側面４ｅ〜４ｈとを備えている。
第一面４ｃおよび第二面４ｄにおいて、アルミニウム箔１１の面積は銅箔１３の面積よりも広く、アルミニウム箔１１が絶縁樹脂フィルム５を介して封入体２のシール部６で密封封止さいる。 As shown in FIGS. 2A and 3A, the flat conductor 4 of the lead member 3 on the positive electrode side includes a first surface 4c, a second surface 4d on the back surface side of the first surface 4c, and a first surface 4c. Side surfaces 4e to 4h surrounding the four sides of the surface 4c and the second surface 4d are provided.
On the first surface 4c and the second surface 4d, the area of the aluminum foil 11 is larger than the area of the copper foil 13, and the aluminum foil 11 is hermetically sealed by the sealing portion 6 of the encapsulant 2 via the insulating resin film 5. .

第一面４ｃおよび第二面４ｄにおけるアルミニウム箔１１と銅箔１３との継ぎ目Ｓ１は直線である。また、第一面４ｃ側の継ぎ目Ｓ１は、平形導体４の長さ方向における一方の端部（側面４ｅまたは４ｇ）から見て、第二面４ｄ側の継ぎ目Ｓ１と同じ距離にある。例えば、側面４ｅから第一面４ｃ側の継ぎ目Ｓ１までの距離Ｌ１が２０ｍｍである場合、側面４ｅから第二面４ｄ側の継ぎ目Ｓ１までの距離Ｌ２も２０ｍｍである。ただし、第一面４ｃ側の継ぎ目Ｓ１の位置と第二面４ｄ側の継ぎ目Ｓ１の位置とが導体４の長さ方向において０．２ｍｍ程度ずれることは許容される。   The joint S1 between the aluminum foil 11 and the copper foil 13 on the first surface 4c and the second surface 4d is a straight line. The seam S1 on the first surface 4c side is the same distance as the seam S1 on the second surface 4d side when viewed from one end (side surface 4e or 4g) in the length direction of the flat conductor 4. For example, when the distance L1 from the side surface 4e to the joint S1 on the first surface 4c side is 20 mm, the distance L2 from the side surface 4e to the joint S1 on the second surface 4d side is also 20 mm. However, the position of the seam S1 on the first surface 4c side and the position of the seam S1 on the second surface 4d side are allowed to deviate by about 0.2 mm in the length direction of the conductor 4.

図３（Ａ）は、絶縁樹脂フィルム５が貼り付けられる前の正極側のリード部材３の斜視図であり、図３（Ｂ）は、図３（Ａ）のＢ部分拡大図である。
図３（Ａ）および（Ｂ）に示すように、平形導体４の側面４ｅ〜４ｇのうち継ぎ目Ｓ１を含む側面４ｆおよび４ｈにおいて、継ぎ目Ｓ１は鋸歯状（Ｗ字状）に形成されている。継ぎ目Ｓ１は、銅箔１３側から見て２つの山部を有している。継ぎ目Ｓ１は、山部が１つのＶ字状でもよいが、接合強度の面から少なくとも２つ以上の山部を有することが望ましい。 FIG. 3A is a perspective view of the lead member 3 on the positive electrode side before the insulating resin film 5 is attached, and FIG. 3B is an enlarged view of a portion B in FIG.
As shown in FIGS. 3A and 3B, of the side surfaces 4e to 4g of the flat conductor 4, the seam S1 is formed in a sawtooth shape (W-shape) on the side surfaces 4f and 4h including the seam S1. The joint S1 has two peaks as viewed from the copper foil 13 side. The seam S <b> 1 may have a single V-shape, but it is desirable to have at least two or more peaks from the viewpoint of bonding strength.

次に、負極側のリード部材３’の平形導体４’について以下説明する。
図２（Ｂ）に示すように、負極側のリード部材３’の平形導体４’は、下端部４ｂ側の銅箔２３に上端部４ａ側のアルミニウム箔２１が接合されて形成されている。平形導体４’においては、下端部４ｂ側の銅箔２３の面積が上端部４ａ側のアルミニウム箔２１の面積よりも広く、銅箔２３が絶縁樹脂フィルム５を介して封入体２のシール部６で密封封止されている。 Next, the flat conductor 4 ′ of the negative lead member 3 ′ will be described below.
As shown in FIG. 2 (B), the flat conductor 4 ′ of the lead member 3 ′ on the negative electrode side is formed by joining the aluminum foil 21 on the upper end 4a side to the copper foil 23 on the lower end 4b side. In the flat conductor 4 ′, the area of the copper foil 23 on the lower end portion 4 b side is larger than the area of the aluminum foil 21 on the upper end portion 4 a side, and the copper foil 23 is interposed between the insulating resin film 5 and the sealing portion 6 of the enclosure 2. Is hermetically sealed.

負極側のリード部材３’の平形導体４’は、正極側のリード部材３の平形導体４と同様に、第一面４ｃと、第一面４ｃの裏面側の第二面４ｄと、第一面４ｃおよび第二面４ｄの四方を囲む側面４ｅ〜４ｈとを備えている。
正極側のリード部材３の平形導体４と同様に、第一面４ｃおよび第二面４ｄにおける銅箔２３とアルミニウム箔２１との継ぎ目Ｓ２は、直線であり、平形導体４’の長さ方向における一方の端部（側面４ｅまたは４ｇ）から見て第一面４ｃ’側の継ぎ目Ｓ２と第二面４ｄ’側の継ぎ目Ｓ２とが同じ距離にある。さらに、図示は省略するが、図３（Ａ）および（Ｂ）に示す正極側のリード部材３の平形導体４の継ぎ目Ｓ１と同様に、平形導体４’の側面４ｅ〜４ｈのうち継ぎ目Ｓ２を含む側面４ｆおよび４ｈにおいて、継ぎ目Ｓ２は鋸歯状に形成されている。 The flat conductor 4 ′ of the negative electrode side lead member 3 ′ is similar to the flat conductor 4 of the positive electrode side lead member 3, the first surface 4 c, the second surface 4 d on the back surface side of the first surface 4 c, and the first conductor 4 ′. Side surfaces 4e to 4h surrounding the four sides of the surface 4c and the second surface 4d are provided.
Similarly to the flat conductor 4 of the lead member 3 on the positive electrode side, the joint S2 between the copper foil 23 and the aluminum foil 21 on the first surface 4c and the second surface 4d is a straight line, and in the length direction of the flat conductor 4 ′. The seam S2 on the first surface 4c ′ side and the seam S2 on the second surface 4d ′ side are at the same distance when viewed from one end (side surface 4e or 4g). Furthermore, although illustration is omitted, the joint S2 of the side surfaces 4e to 4h of the flat conductor 4 ′ is formed in the same manner as the joint S1 of the flat conductor 4 of the lead member 3 on the positive electrode side shown in FIGS. 3 (A) and 3 (B). In the side surfaces 4f and 4h including, the joint S2 is formed in a sawtooth shape.

なお、本実施形態においては、リード部材３，３’の腐食防止のために、リード部材３，３’の表面を、ポリアクリル酸およびポリアクリル酸アミドを含む樹脂成分と、金属塩とを含む複合皮膜層で表面処理している。この場合の金属塩としては、環境汚染の問題からクロムを含まない、例えば、ジルコニウム塩，チタン塩，その他モリブデン塩等を用いることが好ましい。ジルコニウム塩にはフッ化ジルコン酸塩や炭酸ジルコニウム塩、リン酸ジルコニウム塩などを使用することができる。チタン塩にはキレート系の有機チタンなどを使用することができる。モリブデン塩にはモリブデン酸塩を使用することができる。
このような表面処理に使用される処理液には、接着性向上のため、オキサゾリン基を樹脂成分に付与している。 In the present embodiment, in order to prevent corrosion of the lead members 3 and 3 ′, the surface of the lead members 3 and 3 ′ includes a resin component containing polyacrylic acid and polyacrylamide and a metal salt. Surface treatment is performed with a composite coating layer. As the metal salt in this case, it is preferable to use, for example, zirconium salt, titanium salt, other molybdenum salt or the like which does not contain chromium because of the problem of environmental pollution. Zirconium fluoride salt, zirconium carbonate salt, zirconium phosphate salt and the like can be used as the zirconium salt. As the titanium salt, chelating organic titanium or the like can be used. Molybdate can be used as the molybdenum salt.
The treatment liquid used for such surface treatment is imparted with an oxazoline group to the resin component in order to improve adhesion.

絶縁樹脂フィルム５は、図１（Ｂ）に示すように、リード部材３，３’の平形導体４，４’の両面に、接着または溶着する内側層５ａと封入体２と融着される外側層５ｂの２層で形成することができる。内側層５ａは、加熱溶融により平形導体４，４’に密着させて、導体界面における良好な密封封止を形成する。外側層５ｂは、内側層５ａの融点より高い融点のものが用いられ、平形導体４，４’との密封封止時には溶融が生じないようにして形状を保持する。そして、封入体２とのシール時に、外側層５ｂと封入体２と融着させることで、封入体２内の金属箔２ｂと平形導体４，４’が電気的に短絡しないようにすることができる。   As shown in FIG. 1B, the insulating resin film 5 is bonded to and welded to the both sides of the flat conductors 4, 4 ′ of the lead members 3, 3 ′ and the outer side bonded to the encapsulant 2. The two layers 5b can be formed. The inner layer 5a is brought into close contact with the flat conductors 4 and 4 'by heating and melting to form a good hermetic seal at the conductor interface. The outer layer 5b has a melting point higher than that of the inner layer 5a. The outer layer 5b retains its shape so as not to melt when sealed with the flat conductors 4 and 4 '. And when sealing with the enclosure 2, the outer layer 5 b and the enclosure 2 are fused to prevent the metal foil 2 b and the flat conductors 4, 4 ′ in the enclosure 2 from being electrically short-circuited. it can.

正極側のリード部材３においては、絶縁樹脂フィルム５は、平形導体４の長さ方向の両端部（側面４ｅ側および側面４ｇ側の端部）が露出された状態で、平形導体４の幅方向において下端部４ｂ側のアルミニウム箔１１を覆って外方にはみ出るように配置されている。そして、絶縁樹脂フィルム５の外方にはみ出した部分が互いに貼り合わされている。   In the lead member 3 on the positive electrode side, the insulating resin film 5 is formed in the width direction of the flat conductor 4 with both ends in the length direction of the flat conductor 4 (ends on the side surface 4e side and side surface 4g side) exposed. In FIG. 2, the aluminum foil 11 on the lower end 4b side is covered so as to protrude outward. And the part which protruded to the outer side of the insulating resin film 5 is bonded together.

一方、負極側のリード部材３’においては、絶縁樹脂フィルム５は、平形導体４’の長さ方向の両端部（側面４ｅ側および側面４ｇ側の端部）が露出された状態で、平形導体４’の幅方向において下端部４ｂ側の銅箔２３を覆って外方にはみ出るように配置されている。そして、絶縁樹脂フィルム５の外方にはみ出した部分が互いに貼り合わされている。   On the other hand, in the lead member 3 ′ on the negative electrode side, the insulating resin film 5 has a flat conductor in a state where both ends in the length direction of the flat conductor 4 ′ (ends on the side surface 4e side and side surface 4g side) are exposed. In the 4 ′ width direction, the copper foil 23 on the lower end 4b side is covered so as to protrude outward. And the part which protruded to the outer side of the insulating resin film 5 is bonded together.

図２（Ａ）に示すように、正極側のリード部材３の継ぎ目Ｓ１は、絶縁樹脂フィルム５の外側に配置される。具体的には、継ぎ目Ｓ１は、絶縁樹脂フィルム５の継ぎ目Ｓ１側の端部５ａから２ｍｍ以上離れた位置に配置される。
図２（Ｂ）に示すように、負極側のリード部材３’の継ぎ目Ｓ２は、絶縁樹脂フィルム５の外側に配置される。具体的には、継ぎ目Ｓ２は、絶縁樹脂フィルム５の継ぎ目Ｓ２側の端部５ａから２ｍｍ以上離れた位置に配置される。 As shown in FIG. 2A, the joint S <b> 1 of the lead member 3 on the positive electrode side is disposed outside the insulating resin film 5. Specifically, the joint S1 is disposed at a position 2 mm or more away from the end 5a on the joint S1 side of the insulating resin film 5.
As shown in FIG. 2B, the joint S2 of the lead member 3 ′ on the negative electrode side is disposed outside the insulating resin film 5. Specifically, the joint S2 is disposed at a position 2 mm or more away from the end 5a of the insulating resin film 5 on the joint S2 side.

以上説明したように、本実施形態においては、アルミニウム箔１１，２１と銅箔１３，２３とを接合する際に、継ぎ目Ｓ１，Ｓ２が、側面４ｆおよび４ｈにおいて、鋸歯状に形成されている。そのため、継ぎ目Ｓ１，Ｓ２の機械的強度が強く、切断されにくい。
また、継ぎ目Ｓ１，Ｓ２は、平形導体４，４’の長さ方向の一方の端部（側面４ｅまたは４ｇ）から見て同じ距離にある。そのため、アルミニウム箔と銅箔とを重ねて溶接する従来技術に比べて、リード部材３，３’の長さを短くすることができ、リード部材３，３’を用いた非水電解質電池１の小型化が可能となる。 As described above, in the present embodiment, when the aluminum foils 11 and 21 and the copper foils 13 and 23 are joined, the seams S1 and S2 are formed in a sawtooth shape on the side surfaces 4f and 4h. Therefore, the mechanical strength of the joints S1, S2 is strong and is not easily cut.
The joints S1 and S2 are at the same distance when viewed from one end (side surface 4e or 4g) in the length direction of the flat conductors 4 and 4 ′. Therefore, the length of the lead members 3 and 3 ′ can be shortened as compared with the prior art in which the aluminum foil and the copper foil are overlapped and welded, and the nonaqueous electrolyte battery 1 using the lead members 3 and 3 ′ can be shortened. Miniaturization is possible.

従来は、正極側のリード部材にアルミニウムが用いられ、負極側のリード部材に銅が用いられていた。そのため、外部回路に接続する際に正極側のリード部材と負極側のリード部材とで異なる接続条件を必要とした。しかし、本実施形態によれば、正極側のリード部材３も負極側のリード部材３’もアルミニウムと銅とを接合した平形導体４，４’から構成されているため、外部回路との接続条件を統一することができ、接続の際のコストを削減することができる。   Conventionally, aluminum is used for the lead member on the positive electrode side, and copper is used for the lead member on the negative electrode side. Therefore, when connecting to an external circuit, different connection conditions are required for the positive-side lead member and the negative-side lead member. However, according to this embodiment, both the positive lead member 3 and the negative lead member 3 'are composed of the flat conductors 4 and 4' obtained by joining aluminum and copper. Can be unified, and the connection cost can be reduced.

また、本実施形態においては、継ぎ目Ｓ１，Ｓ２は絶縁樹脂フィルム５の外部（絶縁樹脂フィルム５の継ぎ目Ｓ１，Ｓ２側の端部から２ｍｍ以上離れた位置）であってさらに封入体２の外部に位置している。そのため、継ぎ目Ｓ１，Ｓ２が封入体２の内部に収容された電解液と接触する恐れがなく、耐電解液性は非常に良好である。   Further, in the present embodiment, the joints S1 and S2 are outside the insulating resin film 5 (positions 2 mm or more away from the ends of the insulating resin film 5 on the joints S1 and S2 side) and further outside the enclosure 2. positioned. Therefore, there is no fear that the joints S1 and S2 come into contact with the electrolytic solution accommodated in the enclosure 2, and the electrolytic solution resistance is very good.

なお、正極側のリード部材３は、アルミニウム箔１１よりも高価な銅箔１３を上端部４ａ側の材料として用いているが、継ぎ目Ｓ１は、絶縁樹脂フィルム５の上端部４ａ側の端部から２ｍｍ以上離れた位置に配置されるため、銅箔１３の面積が小さく、低コストで作成可能である。さらに、負極側のリード部材３’は、銅箔２３よりも安価なアルミニウム箔２１を上端部４ａ側の材料として用いているため、従来よりも使用される銅箔２３の面積が小さくなり、低コストで作成可能である。   The lead member 3 on the positive electrode side uses a copper foil 13 that is more expensive than the aluminum foil 11 as a material on the upper end portion 4a side, but the joint S1 extends from the end portion on the upper end portion 4a side of the insulating resin film 5. Since the copper foil 13 is disposed at a position separated by 2 mm or more, the area of the copper foil 13 is small and can be produced at low cost. Furthermore, since the lead member 3 ′ on the negative electrode side uses the aluminum foil 21 which is cheaper than the copper foil 23 as the material on the upper end portion 4a side, the area of the copper foil 23 used is smaller than that of the conventional copper foil 23. Can be created at a cost.

（変形例１）
図４（Ａ）および（Ｂ）は、変形例１に係るリード部材を示す。
図４（Ａ）および（Ｂ）に示すように、リード部材１０３，１０３’の平形導体１０４，１０４’の継ぎ目Ｓ１，Ｓ２は、絶縁樹脂フィルム５の内側に配置されてもよい。このとき、継ぎ目Ｓ１，Ｓ２は、絶縁樹脂フィルム５の継ぎ目Ｓ１，Ｓ２側の端部（平形導体４の上端部４ａ側の端部）５ａから２ｍｍ以内の位置にあることが望ましい。 (Modification 1)
4A and 4B show a lead member according to Modification 1. FIG.
4A and 4B, the joints S1 and S2 of the flat conductors 104 and 104 ′ of the lead members 103 and 103 ′ may be arranged inside the insulating resin film 5. At this time, it is desirable that the joints S1 and S2 are located within 2 mm from the end portion (the end portion on the upper end portion 4a side of the flat conductor 4) 5a of the insulating resin film 5 on the joint S1 and S2 side.

変形例１に係るリード部材１０３およびリード部材１０３’においては、継ぎ目Ｓ１，Ｓ２は、絶縁樹脂フィルム５の内部であって絶縁樹脂フィルム５の継ぎ目Ｓ１，Ｓ２側の端部５ａ近傍に位置している。そのため、継ぎ目Ｓ１，Ｓ２は、封入体２の内部に収容された電解液からは離れた位置にあり、耐電解液性が良好である。また、継ぎ目Ｓ１，Ｓ２は絶縁樹脂フィルム５により保護されているため、大気中での腐食および振動に強い。   In the lead member 103 and the lead member 103 ′ according to the modified example 1, the joints S1 and S2 are located inside the insulating resin film 5 and in the vicinity of the end portion 5a on the joint S1 and S2 side of the insulating resin film 5. Yes. Therefore, the joints S1 and S2 are located away from the electrolytic solution accommodated in the enclosure 2 and have good resistance to electrolytic solution. Further, since the joints S1 and S2 are protected by the insulating resin film 5, they are resistant to corrosion and vibration in the atmosphere.

（変形例２）
図５（Ａ）および（Ｂ）は、変形例２に係るリード部材を示す。
図５（Ａ）および（Ｂ）に示すように、リード部材２０３，２０３’ の平形導体２０４，２０４’の継ぎ目Ｓ１，Ｓ２は、絶縁樹脂フィルム５の長さ方向の中心を通り幅方向に平行な中心線Ｃとほぼ同じ位置に配置されてもよい。このとき、リード部材２０３，２０３’の継ぎ目Ｓ１，Ｓ２は、例えば、中心線Ｃから１ｍｍ以内の位置に配置されていることが望ましい。 (Modification 2)
5A and 5B show a lead member according to the second modification.
As shown in FIGS. 5A and 5B, the joints S1 and S2 of the flat conductors 204 and 204 ′ of the lead members 203 and 203 ′ pass through the center in the length direction of the insulating resin film 5 and are parallel to the width direction. May be arranged at substantially the same position as the center line C. At this time, it is desirable that the joints S1 and S2 of the lead members 203 and 203 ′ are disposed at a position within 1 mm from the center line C, for example.

変形例２に係るリード部材２０３およびリード部材２０３’においては、継ぎ目Ｓ１，Ｓ２は、絶縁樹脂フィルム５の内部であって絶縁樹脂フィルム５の中心線Ｃ近傍に位置している。すなわち、継ぎ目Ｓ１，Ｓ２は絶縁樹脂フィルム５により保護されているとともに、封入体２の多層フィルム２ａ〜２ｃにより覆われる箇所に位置している。そのため、大気中での腐食および振動には非常に強い。しかし、継ぎ目Ｓ１，Ｓ２は封入体２の内部に収容された電解液に近い位置にあるため、図２や図４に示す例に比べて耐電解液性が比較的弱い。   In the lead member 203 and the lead member 203 ′ according to the modified example 2, the joints S <b> 1 and S <b> 2 are located inside the insulating resin film 5 and in the vicinity of the center line C of the insulating resin film 5. That is, the joints S1 and S2 are protected by the insulating resin film 5 and are located at locations covered by the multilayer films 2a to 2c of the enclosure 2. Therefore, it is very resistant to corrosion and vibration in the atmosphere. However, since the joints S1 and S2 are located close to the electrolyte contained in the enclosure 2, the resistance to the electrolyte is relatively weak compared to the examples shown in FIGS.

（評価試験）
図３（Ａ）および（Ｂ）に示す本実施形態に係るリード部材３，３’、図４（Ａ）および（Ｂ）に示す変形例１に係るリード部材１０３，１０３’、図５（Ａ）および（Ｂ）に示す変形例２に係るリード部材２０３，２０３’に対して、それぞれ、大気中での耐食性、耐電解液性、振動耐性について評価試験を行った。その結果を表１に示す。 (Evaluation test)
Lead members 3, 3 ′ according to the present embodiment shown in FIGS. 3A and 3B, lead members 103, 103 ′ according to Modification 1 shown in FIGS. 4A and 4B, and FIG. ) And the lead members 203 and 203 ′ according to the modified example 2 shown in (B) were evaluated for corrosion resistance, electrolytic solution resistance, and vibration resistance in the air, respectively. The results are shown in Table 1.

Figure 2016096096
Figure 2016096096

表１の「大気中での耐食性」は、耐食試験を[−４０℃×１．５Ｈ（湿度は管理しない）〜８０℃・８０％Ｒｈ×６Ｈ]を６０サイクルで行い、局部電気腐食が発生しなければ良好とする。
表１中の「不良」は、上記試験をクリアしないことを示す。「良好」は上記試験をクリアするが８０サイクルまでは持たないことを示す。「非常に良好」は、８０サイクルをクリアすることを示す。
「耐電解液性」は、６０℃の電解液（エチレンカーボネート：ジメチルカーボネート：ジエチルカーボネートが１：１：１の割合）にリード部材を２週間浸漬した後、対導体接着力が５．５Ｎ／ｃｍ以上あることを示す。
表１中の「比較的弱い」は、対導体接着力が５．０〜６．０Ｎ／ｃｍであることを示す。「良好」は、対導体接着力が６．０〜７．０Ｎ／ｃｍであることを示す。「非常に良好」は、対導体接着力が７．０Ｎ／ｃｍ以上であることを示す。
「振動耐性」は、ＪＩＳ Ｚ２１０３に準じて、片振り引張疲れ試験を１０７回繰り返した後でリード部材に破断がないことを示す。
「不良」は、片振り引張疲れ試験を１０７回繰り返すまでにリード部材が破断することを示す。「良好」は、片振り引張疲れ試験を１０７〜１０8回繰り返す間にリード部材が破断することを示す。「非常に良好」は、片振り引張疲れ試験を１０8回以上繰り返してもリード部材が破断しないことを示す。 “Corrosion resistance in the atmosphere” in Table 1 shows that the corrosion resistance test [−40 ° C. × 1.5H (humidity is not controlled) to 80 ° C./80% Rh × 6H] is performed in 60 cycles, and local corrosion occurs. If not, it will be good.
“Bad” in Table 1 indicates that the above test is not cleared. “Good” indicates that the above test is cleared but it does not have up to 80 cycles. “Very good” indicates clearing 80 cycles.
“Electrolytic solution resistance” is obtained by immersing a lead member in an electrolytic solution (ethylene carbonate: dimethyl carbonate: diethyl carbonate in a ratio of 1: 1: 1) at 60 ° C. for 2 weeks, and then the adhesion strength to the conductor is 5.5 N / It shows that it is cm or more.
“Relatively weak” in Table 1 indicates that the adhesion to the conductor is 5.0 to 6.0 N / cm. “Good” indicates that the adhesion to the conductor is 6.0 to 7.0 N / cm. “Very good” indicates that the adhesion to the conductor is 7.0 N / cm or more.
"Vibration resistance" according to JIS Z2103, indicating that there is no break in the lead member after repeated pulsating tensile fatigue test 107 times.
“Bad” indicates that the lead member breaks by repeating the swing swing fatigue test 10 7 times. “Good” indicates that the lead member breaks while repeating the swing swing fatigue test 10 7 to 10 8 times. “Very good” indicates that the lead member does not break even when the swing-strain tensile fatigue test is repeated 10 8 times or more.

表１に示すように、図３（Ａ）に示す正極側のリード部材３および図３（Ｂ）に示す負極側のリード部材３’においては、耐電解液性は非常に良好であることが確認された。ただし、リード部材３，３’は、外気に触れる面に継ぎ目Ｓ１，Ｓ２があるため、大気中での耐食性は不良であり、腐食が懸念される場合には用いることができない。さらに、継ぎ目Ｓ１，Ｓ２が絶縁樹脂フィルム５により保護されていないため、継ぎ目Ｓ１，Ｓ２に応力がかかりやすく、振動耐性の面で図４および図５に示すリード部材１０３（１０３’），２０３（２０３’）に比べて劣る。   As shown in Table 1, the electrolyte solution resistance of the positive lead member 3 shown in FIG. 3A and the negative lead member 3 ′ shown in FIG. 3B is very good. confirmed. However, since the lead members 3 and 3 'have joints S1 and S2 on the surface that comes into contact with the outside air, the corrosion resistance in the atmosphere is poor and cannot be used when corrosion is a concern. Further, since the joints S1 and S2 are not protected by the insulating resin film 5, the joints S1 and S2 are likely to be stressed, and lead members 103 (103 ′) and 203 (203) shown in FIGS. 203 ′).

図４（Ａ）に示す正極側のリード部材１０３および図４（Ｂ）に示す負極側のリード部材１０３’においては、上述の通り、大気中での耐食性、耐電解液性、振動耐性はいずれも良好であることが確認された。   In the lead member 103 on the positive electrode side shown in FIG. 4A and the lead member 103 ′ on the negative electrode side shown in FIG. 4B, the corrosion resistance, electrolyte resistance, and vibration resistance in the atmosphere are all as described above. Was also confirmed to be good.

図５（Ａ）に示す正極側のリード部材２０３および図５（Ｂ）に示す負極側のリード部材２０３’においては、上述の通り、大気中での耐食性および振動耐性は非常に良好であるが、耐電解液性が比較的弱いことが確認された。   In the positive lead member 203 shown in FIG. 5A and the negative lead member 203 ′ shown in FIG. 5B, the corrosion resistance and vibration resistance in the atmosphere are very good as described above. It was confirmed that the resistance to electrolytic solution was relatively weak.

以上、本発明を詳細にまた特定の実施態様を参照して説明したが、本発明の精神と範囲を逸脱することなく様々な変更や修正を加えることができることは当業者にとって明らかである。また、上記説明した構成部材の数、位置、形状等は上記実施の形態に限定されず、本発明を実施する上で好適な数、位置、形状等に変更することができる。   While the invention has been described in detail and with reference to specific embodiments, it will be apparent to those skilled in the art that various changes and modifications can be made without departing from the spirit and scope of the invention. In addition, the number, position, shape, and the like of the constituent members described above are not limited to the above-described embodiments, and can be changed to a number, position, shape, and the like that are suitable for carrying out the present invention.

上記実施形態においては、リード部材３，３’の表面を樹脂成分と金属塩とを含む複合皮膜層で表面処理している構成を説明したが、この例に限られない。耐食性の向上した絶縁樹脂フィルムを用いることができれば、リード部材３，３’の表面を複合皮膜層で表面処理する必要はない。   In the above embodiment, the structure in which the surface of the lead members 3 and 3 ′ is surface-treated with the composite coating layer containing the resin component and the metal salt has been described, but the present invention is not limited to this example. If an insulating resin film with improved corrosion resistance can be used, it is not necessary to treat the surfaces of the lead members 3 and 3 'with the composite coating layer.

上記実施形態においては、リード部材３の下端部４ｂのアルミニウム箔１１の面積は上端部４ａの銅箔１３の面積よりも広いが、この例に限られない。アルミニウム箔１１と銅箔１３は同程度の面積でもよく、アルミニウム箔１１の面積が銅箔１３の面積より狭くてもよい。
また、リード部材３’についても同様に、アルミニウム箔２１と銅箔２３は同程度の面積でもよく、下端部４ｂの銅箔２３の面積が上端部４ａのアルミニウム箔２１の面積より狭くてもよい。 In the said embodiment, although the area of the aluminum foil 11 of the lower end part 4b of the lead member 3 is wider than the area of the copper foil 13 of the upper end part 4a, it is not restricted to this example. The aluminum foil 11 and the copper foil 13 may have the same area, and the area of the aluminum foil 11 may be smaller than the area of the copper foil 13.
Similarly, for the lead member 3 ', the aluminum foil 21 and the copper foil 23 may have the same area, and the area of the copper foil 23 at the lower end 4b may be smaller than the area of the aluminum foil 21 at the upper end 4a. .

１：非水電解質電池
２：封入体
２ａ：最内層フィルム
２ｂ：金属箔層
２ｃ：最外層フィルム
３，１０３，２０３：正極側のリード部材
３’，１０３’，２０３’：負極側のリード部材
４，４’，１０４，１０４’，２０４，２０４’：平形導体
４ａ：上端部
４ｂ：下端部
４ｃ：第一面
４ｄ：第二面
４ｅ〜４ｈ：側面
５：絶縁樹脂フィルム
６：シール部
７：電極板リード
１１，２１：アルミニウム箔
１３，２３：銅箔 1: Nonaqueous electrolyte battery 2: Enclosure 2a: Innermost layer film 2b: Metal foil layer 2c: Outermost layer film 3, 103, 203: Lead member 3 ', 103', 203 'on the positive electrode side: Lead member on the negative electrode side 4, 4 ', 104, 104', 204, 204 ': Flat conductor 4a: Upper end 4b: Lower end 4c: First surface 4d: Second surfaces 4e-4h: Side surface 5: Insulating resin film 6: Seal portion 7 : Electrode plate leads 11 and 21: Aluminum foils 13 and 23: Copper foil

Claims (5)

第一の金属と前記第一の金属とは異種の第二の金属とが接合された平形導体の両面から絶縁樹脂フィルムが貼り合わされたリード部材であって、
前記平形導体は、主表面である第一面と、前記第一面の裏面である第二面と、前記第一面および前記第二面の四方を囲む側面と、を備え、
前記第一の金属と前記第二の金属との継ぎ目は前記第一面および前記第二面において直線であり、
前記継ぎ目と平行な方向を幅方向とし、前記幅方向と垂直の方向を長さ方向としたときに、前記第一面の継ぎ目と前記第二面の継ぎ目は、前記平形導体の前記長さ方向の少なくとも一方の端部から同じ距離に配置され、
前記側面のうち前記継ぎ目を含む二面のそれぞれにおいて、前記継ぎ目は鋸歯状に形成され、
前記絶縁樹脂フィルムは、前記長さ方向において前記平形導体の両端部が露出され、前記幅方向において少なくとも前記第一の金属を覆って外方にはみ出るように配置され、前記絶縁樹脂フィルムの外方にはみ出した部分が互いに貼り合わされている、リード部材。 A lead member in which an insulating resin film is bonded from both sides of a flat conductor in which a first metal and the first metal are bonded to a different second metal,
The flat conductor includes a first surface that is a main surface, a second surface that is a back surface of the first surface, and side surfaces that surround four sides of the first surface and the second surface,
The seam between the first metal and the second metal is a straight line on the first surface and the second surface;
When the direction parallel to the seam is the width direction and the direction perpendicular to the width direction is the length direction, the seam of the first surface and the seam of the second surface are the length direction of the flat conductor. Arranged at the same distance from at least one end of
In each of the two surfaces including the seam among the side surfaces, the seam is formed in a sawtooth shape,
The insulating resin film is disposed so that both end portions of the flat conductor are exposed in the length direction and protrudes outwardly covering at least the first metal in the width direction. A lead member in which protruding portions are bonded to each other. 前記継ぎ目は、前記絶縁樹脂フィルムの外側であって、前記絶縁樹脂フィルムの前記継ぎ目側の端部から２ｍｍ以上離れた位置にある、請求項１に記載のリード部材。   2. The lead member according to claim 1, wherein the joint is located outside the insulating resin film and at a position 2 mm or more away from an end of the insulating resin film on the joint side. 前記継ぎ目は、前記絶縁樹脂フィルムの内側であって、前記絶縁樹脂フィルムの前記継ぎ目側の端部から２ｍｍ以内の位置にある、請求項１に記載のリード部材。   2. The lead member according to claim 1, wherein the joint is inside the insulating resin film and is located within 2 mm from an end of the insulating resin film on the joint side. 前記継ぎ目は、前記絶縁樹脂フィルムの前記幅方向に沿った中心線から１ｍｍ以内の位置にある、請求項１に記載のリード部材。   2. The lead member according to claim 1, wherein the joint is located within 1 mm from a center line along the width direction of the insulating resin film. 請求項１から請求項４のいずれか一項に記載のリード部材を有する電池であって、
発電素子が包材内に収容され、
前記リード部材が前記発電素子の電極と接続され、
前記第二の金属と前記絶縁樹脂フィルムの前記長さ方向の一端が前記包材の外側に配置され、
前記第一の金属と前記絶縁樹脂フィルムの前記長さ方向の他端が前記包材の内側に配置されている、電池。 A battery having the lead member according to any one of claims 1 to 4,
The power generation element is contained in the packaging material,
The lead member is connected to an electrode of the power generation element;
One end in the length direction of the second metal and the insulating resin film is disposed outside the packaging material,
The battery in which the other end in the length direction of the first metal and the insulating resin film is disposed inside the packaging material.
JP2014232418A 2014-11-17 2014-11-17 Lead member and battery Active JP6413682B2 (en)

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CN201510789193.8A CN105609694A (en) 2014-11-17 2015-11-17 Lead member and battery
KR1020170054272A KR20170052547A (en) 2014-11-17 2017-04-27 Battery

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Publication number Priority date Publication date Assignee Title
JP6759970B2 (en) * 2016-10-24 2020-09-23 住友電気工業株式会社 Lead member

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007134233A (en) * 2005-11-11 2007-05-31 Toyota Motor Corp Battery terminal structure
JP2011148164A (en) * 2010-01-20 2011-08-04 Sanehiro Yamaguchi Clad material and method of manufacturing the same
JP2011243531A (en) * 2010-05-21 2011-12-01 Sumitomo Electric Ind Ltd Metal lead and manufacturing method thereof
JP2012518545A (en) * 2010-02-25 2012-08-16 テクニカル・マテリアルズ・インコーポレイテッド Method for producing side-by-side metal bonds between dissimilar materials using solid phase bonding and product produced thereby
JP2013054823A (en) * 2011-08-31 2013-03-21 Sanyo Electric Co Ltd Dissimilar metal bonding joint and terminal connection member
WO2014024448A1 (en) * 2012-08-09 2014-02-13 三洋電機株式会社 Battery pack, electric vehicle provided with same, and power storage device
WO2015145715A1 (en) * 2014-03-28 2015-10-01 オートモーティブエナジーサプライ株式会社 Cell terminal and cell
JP2016004731A (en) * 2014-06-19 2016-01-12 オートモーティブエナジーサプライ株式会社 Negative electrode terminal for battery

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5569261B2 (en) * 2010-08-27 2014-08-13 住友電気工業株式会社 Lead member and lead member manufacturing method
KR20140011962A (en) * 2012-07-20 2014-01-29 스미토모 덴키 고교 가부시키가이샤 Tab lead and battery

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007134233A (en) * 2005-11-11 2007-05-31 Toyota Motor Corp Battery terminal structure
JP2011148164A (en) * 2010-01-20 2011-08-04 Sanehiro Yamaguchi Clad material and method of manufacturing the same
JP2012518545A (en) * 2010-02-25 2012-08-16 テクニカル・マテリアルズ・インコーポレイテッド Method for producing side-by-side metal bonds between dissimilar materials using solid phase bonding and product produced thereby
JP2011243531A (en) * 2010-05-21 2011-12-01 Sumitomo Electric Ind Ltd Metal lead and manufacturing method thereof
JP2013054823A (en) * 2011-08-31 2013-03-21 Sanyo Electric Co Ltd Dissimilar metal bonding joint and terminal connection member
WO2014024448A1 (en) * 2012-08-09 2014-02-13 三洋電機株式会社 Battery pack, electric vehicle provided with same, and power storage device
WO2015145715A1 (en) * 2014-03-28 2015-10-01 オートモーティブエナジーサプライ株式会社 Cell terminal and cell
JP2016004731A (en) * 2014-06-19 2016-01-12 オートモーティブエナジーサプライ株式会社 Negative electrode terminal for battery

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KR20160058707A (en) 2016-05-25

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