JP2002100340A - Battery and its manufacturing method - Google Patents

Battery and its manufacturing method

Info

Publication number
JP2002100340A
JP2002100340A JP2000289038A JP2000289038A JP2002100340A JP 2002100340 A JP2002100340 A JP 2002100340A JP 2000289038 A JP2000289038 A JP 2000289038A JP 2000289038 A JP2000289038 A JP 2000289038A JP 2002100340 A JP2002100340 A JP 2002100340A
Authority
JP
Japan
Prior art keywords
electrode
protruding end
electrode body
battery
battery according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP2000289038A
Other languages
Japanese (ja)
Other versions
JP5034135B2 (en
Inventor
Akio Iwase
昭夫 岩瀬
Kenichi Fujiwara
健一 藤原
Yukihisa Takeuchi
幸久 竹内
Yoshihiko Sumiya
賀彦 角谷
Toru Harada
徹 原田
Tomoyasu Takeuchi
友康 竹内
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Denso Corp
Original Assignee
Denso Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Denso Corp filed Critical Denso Corp
Priority to JP2000289038A priority Critical patent/JP5034135B2/en
Publication of JP2002100340A publication Critical patent/JP2002100340A/en
Application granted granted Critical
Publication of JP5034135B2 publication Critical patent/JP5034135B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • 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

Abstract

PROBLEM TO BE SOLVED: To provide a down-sized battery and its manufacturing method. SOLUTION: This battery is characterized that it has an electrode body 1 and an electrode terminal 5 joined to an end part of protruding end parts 23, 33 via a bridging part 54. Because the electrode terminal is joined to the end part of the electrode body in this battery, a length of the electrode body can be shortened, and the battery can be down-sized.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】本発明は、正極板および負極
板がセパレータを介して配置された電極体を有する電池
に関し、詳しくは、体格の小型化された電池に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a battery having an electrode body in which a positive electrode plate and a negative electrode plate are arranged with a separator interposed therebetween, and more particularly, to a battery having a reduced size.

【０００２】[0002]

【従来の技術】近年、さまざまな装置において、常に高
性能化が求められている。この高性能化された装置を得
るための手段として、装置の体格の小型化や、重量の軽
量化がある。このような高性能化は、電池においても例
外ではない。2. Description of the Related Art In recent years, various devices have always been required to have high performance. Means for obtaining this high-performance device include reducing the size of the device and reducing its weight. Such high performance is no exception in batteries.

【０００３】高性能化された電池として、電極体を薄型
化、高密度化し、これを渦巻状に巻回して形成された巻
回型電極体を用いた電池が知られている。また、この巻
回型電極体は、その生産性においても有用であることが
知られ、広く用いられるようになってきている。As a battery with high performance, a battery using a wound electrode body formed by reducing the thickness and density of an electrode body and spirally winding the electrode body is known. Further, the wound electrode body is known to be useful also in productivity, and has been widely used.

【０００４】巻回型電極体は、シート状の正極板、負極
板およびセパレータから構成され、セパレータを介して
正極板と負極板とを積層させ、この積層体を巻回させて
形成される。A wound electrode body is composed of a sheet-like positive electrode plate, a negative electrode plate, and a separator, and is formed by laminating a positive electrode plate and a negative electrode plate via a separator, and winding the laminate.

【０００５】巻回型電極体は、通常は、その断面形状が
真円もしくはそれに近い円状に形成される。このような
円形状に形成された巻回型電極体は、断面が略円形状に
形成されたケースに封入され、電池を形成している。こ
の略円形状の電池は、外周面が曲面部を有するため、装
置に取り付けるときなどに、その外周面部に無効空間が
生じやすくなっていた。[0005] The wound electrode body is usually formed to have a cross section of a perfect circle or a circular shape close thereto. Such a spirally wound electrode body is sealed in a case having a substantially circular cross section to form a battery. Since the outer peripheral surface of the substantially circular battery has a curved surface portion, an invalid space is likely to be generated in the outer peripheral surface portion when the battery is attached to a device.

【０００６】このため、近年では、巻回型電極体を径方
向に圧縮して扁平化させた扁平形状巻回型電極体が、よ
り高い体積密度を有する電極体として知られている。扁
平形状巻回型電極体は、角型形状のケースを用いること
ができるため、電池の周辺に無効空間が生じにくいとい
う効果も示す。[0006] For this reason, in recent years, a flat wound electrode body obtained by compressing the wound electrode body in the radial direction and flattening it is known as an electrode body having a higher volume density. Since the flat-shaped wound electrode body can use a square-shaped case, it also has an effect that an ineffective space hardly occurs around the battery.

【０００７】扁平形状巻回型電極体を用いた電池は、通
常は、正極板および負極板に電極端子を直接接合するこ
とで、電極体から電力を取り出していた。電極端子が扁
平形状巻回型電極体に接合された様子を図２５および図
２６に示した。[0007] In a battery using a flat wound electrode body, power is usually taken out of the electrode body by directly joining electrode terminals to a positive electrode plate and a negative electrode plate. FIGS. 25 and 26 show a state where the electrode terminals are joined to the flat wound electrode body.

【０００８】詳しくは、扁平形状巻回型電極体１の軸方
向の両端に、正極板２および負極板３の電極活物質２
１、３１の塗布されていない各未塗布部２２、３２より
なる各突出端部２３、３３を形成し、この各突出端部２
３、３３の外周面に電極端子５が軸方向に垂直な方向に
延在した状態で超音波接合等の手段により接合されてい
た。More specifically, the electrode active materials 2 of the positive electrode plate 2 and the negative electrode plate 3 are provided at both ends of the flat wound electrode body 1 in the axial direction.
Each protruding end 23, 33 composed of each uncoated portion 22, 32, which is not coated with 1, 31, is formed.
The electrode terminals 5 were joined to the outer peripheral surfaces of the electrodes 3 and 33 in a state extending in a direction perpendicular to the axial direction by means such as ultrasonic joining.

【０００９】電極端子５が各突出端部２３、３３に接合
された従来の扁平形状巻回型電極電池は、扁平形状巻回
型電極体１の軸方向の両端部に形成された突出端部２
３、３３に、電極端子５を外接あるいは内接させ扁平形
状巻回型電極体１の厚さ方向に積層した未塗布部２２、
３２に電極端子５を接合していた。このため、従来の扁
平形状巻回型電極電池においては、電極端子５と扁平形
状巻回型電極体１とを接合するために、その接合しろを
確保するべく、未塗布部２２、３２の長さを大きくとる
必要があった。したがって、未塗布部２２、３２を長く
することで、突出端部２３、３３の長さが長くなり、扁
平形状巻回型電極体ひいては電池の体格の大型化を生じ
ていた。The conventional flat wound electrode battery in which the electrode terminals 5 are joined to the protruding ends 23 and 33, respectively, has a protruding end formed on both ends of the flat wound electrode body 1 in the axial direction. 2
3, the uncoated portion 22 in which the electrode terminals 5 are circumscribed or inscribed and laminated in the thickness direction of the flat wound electrode body 1;
The electrode terminal 5 was joined to 32. For this reason, in the conventional flat-shaped wound electrode battery, in order to join the electrode terminal 5 and the flat-shaped wound electrode body 1, the length of the uncoated portions 22, 32 is secured in order to secure a joining margin. It was necessary to increase the size. Therefore, by increasing the length of the uncoated portions 22 and 32, the lengths of the protruding end portions 23 and 33 are increased, and the size of the flat wound electrode body and, consequently, the size of the battery are increased.

【００１０】[0010]

【発明が解決しようとする課題】本発明は上記実状に鑑
みてなされたものであり、正極板および負極板がセパレ
ータを介して配された電極体を有する電池において、体
格が小型化された電池およびその製造方法を提供するこ
とを課題とする。SUMMARY OF THE INVENTION The present invention has been made in view of the above situation, and has a reduced size in a battery having an electrode body in which a positive electrode plate and a negative electrode plate are arranged via a separator. And a method for manufacturing the same.

【００１１】[0011]

【課題を解決するための手段】上記課題を解決するため
本発明者等は扁平形状巻回型などの正極板および負極板
がセパレータを介して配された電極体と電極端子との接
合構造について検討を重ねた結果、電極端子を電極体の
端部に架橋部を介して接合した電池とすることで上記課
題を解決できることを見出した。Means for Solving the Problems To solve the above-mentioned problems, the present inventors have developed a joint structure between an electrode body and an electrode terminal in which a positive electrode plate and a negative electrode plate, such as a flat wound type, are arranged via a separator. As a result of repeated studies, it has been found that the above problem can be solved by forming a battery in which the electrode terminal is joined to the end of the electrode body via a bridge.

【００１２】すなわち、本発明の電池は、集電体と、集
電体の両面に塗布された電極活物質と、からなり、電極
活物質が塗布された電極部と、集電体の幅方向の一方の
端部側に形成され集電体の表面が露出した未塗布部と、
を有する帯状の正極板および負極板と、帯状のセパレー
タと、からなり、正極板および負極板が各未塗布部が互
いに反対方向に突出しかつ電極部がセパレータを介した
状態で配置され各未塗布部よりなる突出端部を有する電
極体と、電極体の突出端部の端部に架橋部を介して接合
された電極端子と、を有することを特徴とする。That is, the battery of the present invention comprises a current collector, and an electrode active material applied to both surfaces of the current collector, and an electrode portion coated with the electrode active material, and a width direction of the current collector. An uncoated portion formed on one end side of the and exposing the surface of the current collector,
A positive electrode plate and a negative electrode plate, and a band-shaped separator, and each of the positive electrode plate and the negative electrode plate is disposed in such a manner that each uncoated portion protrudes in the opposite direction and the electrode portion is disposed with the separator interposed therebetween. An electrode body having a protruding end composed of a portion, and an electrode terminal joined to the end of the protruding end of the electrode body via a bridge portion.

【００１３】本発明の電池は、未塗布部よりなる突出端
部の端面部に電極端子を接合しているため、突出端部に
電極端子が外周面および内周面に接合するための接合し
ろをもうける必要がなくなり、突出端部の長さを短縮で
きる。このため、電極端子が接合された状態において、
電極体の長さを短縮できる。この結果、この電極体が用
いられた電池の体格が小型化される効果を示す。本発明
の電池は、体積効率に優れることから、多数の電極体を
用いる組電池を形成したときに特に効果を発揮する。In the battery of the present invention, since the electrode terminal is joined to the end face of the protruding end portion formed of the uncoated portion, the electrode terminal is joined to the protruding end portion for joining the outer peripheral surface and the inner peripheral surface. Therefore, the length of the protruding end can be reduced. Therefore, in a state where the electrode terminals are joined,
The length of the electrode body can be reduced. As a result, the effect of reducing the size of the battery using the electrode body is shown. The battery of the present invention is particularly effective when a battery pack using a large number of electrode bodies is formed because of its excellent volume efficiency.

【００１４】また、本発明の電池の製造方法は、集電体
と、集電体の両面に塗布された電極活物質と、からな
り、電極活物質が塗布された電極部と、集電体の幅方向
の一方の端部側に形成され集電体の表面が露出した未塗
布部と、を有する帯状の正極板および負極板と、帯状の
セパレータと、からなり、正極板および負極板が各未塗
布部が互いに反対方向に突出しかつ電極部がセパレータ
を介した状態で配置され各未塗布部よりなる突出端部を
有する電極体と、軸部と、軸部と一体に形成され突出端
部接合される突起部と、を有する電極端子と、を、各突
出端部の端面に電極端子を接合する電極端子接合工程を
有する電池の製造方法であって、電極端子接合工程が、
電極体の突出端部の端部に電極端子を配置した状態で、
突起部を溶融させ、突起部の溶融液を突出端部の積層し
た未塗布部に供給した後に溶融液を冷却する工程である
ことを特徴とする。Further, a method of manufacturing a battery according to the present invention comprises a current collector, an electrode active material coated on both surfaces of the current collector, and an electrode portion coated with the electrode active material; A strip-shaped positive electrode plate and a negative electrode plate having an uncoated portion formed on one end side in the width direction of the current collector and exposing the surface of the current collector, and a strip-shaped separator; An electrode body having unprojected portions projecting in opposite directions and having electrode portions disposed with a separator interposed therebetween, and having a projecting end portion consisting of each uncoated portion; a shaft portion; and a projecting end formed integrally with the shaft portion. An electrode terminal having a projecting portion to be joined, and an electrode terminal, a method of manufacturing a battery having an electrode terminal joining step of joining an electrode terminal to an end face of each protruding end, wherein the electrode terminal joining step is
In a state where the electrode terminal is arranged at the end of the protruding end of the electrode body,
The method is characterized by a step of melting the projection, supplying the molten liquid of the projection to the uncoated portion where the protruding end is laminated, and then cooling the molten liquid.

【００１５】本発明の電池の製造方法は、電極体の突出
端部の端面に電極端子を接合することができるため、電
極体の軸方向の長さが短縮された電池を製造することが
できる。また、本発明の電池の製造方法は、集電体と電
極端子という板厚差が大きな部材を高い接合強度で接合
することができるため、電極体を電極端子により保持す
ることができる。According to the battery manufacturing method of the present invention, since the electrode terminal can be joined to the end face of the protruding end portion of the electrode body, a battery having a reduced axial length of the electrode body can be manufactured. . In addition, according to the method for manufacturing a battery of the present invention, a member having a large difference in plate thickness between the current collector and the electrode terminal can be bonded with high bonding strength, so that the electrode body can be held by the electrode terminal.

【００１６】[0016]

【発明の実施の形態】（電池）本発明の電池は、電極体
と、電極端子と、を有する電池である。DESCRIPTION OF THE PREFERRED EMBODIMENTS (Battery) The battery of the present invention is a battery having an electrode body and an electrode terminal.

【００１７】電極体は、集電体と、集電体の両面に塗布
された電極活物質と、からなり、電極活物質が塗布され
た電極部と、集電体の幅方向の一方の端部側に形成され
集電体の表面が露出した未塗布部と、を有する帯状の正
極板および負極板と、帯状のセパレータと、からなり、
正極板および負極板が各未塗布部が互いに反対方向に突
出しかつ電極部がセパレータを介した状態で配置され各
未塗布部よりなる突出端部を有する部材である。The electrode body is composed of a current collector and an electrode active material applied to both sides of the current collector. The electrode portion coated with the electrode active material and one end in the width direction of the current collector. A strip-shaped positive electrode plate and a negative electrode plate having an uncoated portion formed on the side of the current collector and exposing the surface of the current collector, and a strip-shaped separator,
The positive electrode plate and the negative electrode plate are members each having an uncoated portion projecting in the opposite direction and having an electrode portion disposed with a separator interposed therebetween, and having a protruding end portion composed of each uncoated portion.

【００１８】ここで、本発明の電池は、正極板および負
極板が電極活物質が塗布されていない各未塗布部が互い
に反対方向に突出しかつ電極部がセパレータを介した状
態で配置され各未塗布部よりなる突出端部を有する電極
体を有している電池であればよく、電池の種類は特に限
定されるものではない。すなわち、電極体は、通常の電
池に用いられる電極体を用いることができ、たとえば、
積層型電極体や、巻回型電極体をあげることができる。
このため、電極体を形成する正極板、負極板およびセパ
レータにおいても、従来の電池の正極、負極およびセパ
レータに用いられた部材を用いることができる。Here, in the battery of the present invention, the positive electrode plate and the negative electrode plate are arranged such that the uncoated portions on which the electrode active material is not applied project in opposite directions and the electrode portions are arranged with the separator interposed therebetween. It is sufficient that the battery has an electrode body having a protruding end portion formed of a coating portion, and the type of the battery is not particularly limited. That is, as the electrode body, an electrode body used for a normal battery can be used.
Examples include a laminated electrode body and a wound electrode body.
For this reason, the members used for the positive electrode, the negative electrode, and the separator of the conventional battery can also be used for the positive electrode plate, the negative electrode plate, and the separator that form the electrode body.

【００１９】電極端子は、電極体の突出端部の端部に架
橋部を介して接合された部材である。ここで、電極端子
は、電極体の突出端部に接合されることで、電極体の電
極部において発生した電力を取り出す部材である。ま
た、電極端子が、突出端部の端部に接合されることで、
突出端部の長さを短縮することができる。この結果、電
極体の軸方向の長さを短くでき、この電極体を有する電
池の体格を小型化することができる。The electrode terminal is a member joined to the end of the protruding end of the electrode body via a bridge. Here, the electrode terminal is a member that extracts electric power generated at the electrode portion of the electrode body by being joined to the protruding end of the electrode body. Also, by bonding the electrode terminal to the end of the protruding end,
The length of the protruding end can be reduced. As a result, the length of the electrode body in the axial direction can be reduced, and the size of the battery having the electrode body can be reduced.

【００２０】本発明の電池は、電極体の突出端部の端部
に電極端子が接合されているため、突出端部に電極端子
を接合させるための接合しろを形成する必要がなく、突
出端部の長さを大幅に短くすることができる。この結
果、本発明の電池は体格を小型化することができる。In the battery of the present invention, since the electrode terminal is joined to the end of the projecting end of the electrode body, there is no need to form a joining margin for joining the electrode terminal to the projecting end, and the projecting end is not required. The length of the part can be greatly reduced. As a result, the battery of the present invention can be downsized.

【００２１】架橋部は、正極板の隣り合う間および負極
板の隣り合う間の間隙内に入り込んで正極板の隣り合う
間および負極板の隣り合う間をそれぞれ接合している。
すなわち、架橋部が、突出端部の隣り合った正極板およ
び負極板の間に入り込んで形成されることで、それぞれ
の電極板を接合するとともに、それぞれの電極板と電極
端子とを接合する。The bridging portion enters the gap between the adjacent positive electrode plates and between the adjacent negative electrode plates to join between the adjacent positive electrode plates and between the adjacent negative electrode plates.
That is, the bridge portion is formed between the positive electrode plate and the negative electrode plate adjacent to each other at the protruding end portion, so that the respective electrode plates are joined and the respective electrode plates and the electrode terminals are joined.

【００２２】架橋部は、複数存在していることが好まし
い。架橋部が複数存在すると、電極板同士および電極板
と電極端子との接合が強固に行われるようになる。すな
わち、架橋部が複数存在することで、電極板同士および
電極端子と電極板との接合箇所が増加し、接合箇所に過
剰な応力が集中することが防止できる。さらに、架橋部
が複数存在することで、電極体が大電流を発生させたと
きに、一つの架橋部に流れる電流を低減させることがで
き、架橋部が大電流による過熱損傷を生じることが抑え
られる。It is preferable that a plurality of cross-linking portions exist. When there are a plurality of cross-linking portions, bonding between the electrode plates and between the electrode plates and the electrode terminals are firmly performed. That is, the presence of a plurality of bridge portions increases the number of joints between the electrode plates and between the electrode terminal and the electrode plate, and prevents concentration of excessive stress on the joints. Furthermore, the presence of a plurality of cross-linking portions can reduce the current flowing through one cross-linking portion when the electrode body generates a large current, and suppress the cross-linking portion from causing overheating damage due to the large current. Can be

【００２３】正極板、負極板およびセパレータは帯状の
形状を有し、正極板および負極板がセパレータを介して
巻回された扁平形状巻回型構成を有していることが好ま
しい。正極板および負極板がセパレータを介して巻回さ
れた扁平形状巻回型構成を有している電極体とは、扁平
形状巻回型電極体を示す。扁平形状巻回型電極体は、正
極板および負極板がセパレータを介して巻回された円形
状の断面を有する巻回型電極体が、軸方向に垂直な方向
で圧縮された電極体、もしくは、平板状の巻芯体にレー
ストラック状に巻回された電極体を示す。扁平形状巻回
型電極体は、巻回型電極体の軸方向に垂直な断面が、互
いに対向した一対の長辺部と、互いに対向した一対の湾
曲部と、からなる断面形状を有する。扁平形状巻回型電
極体は、体積効率に優れているため、電池を形成したと
きに体積効率に優れた高性能な電池が得られる。It is preferable that the positive electrode plate, the negative electrode plate, and the separator have a band-like shape, and have a flat wound configuration in which the positive electrode plate and the negative electrode plate are wound with the separator interposed therebetween. An electrode body having a flat wound configuration in which a positive electrode plate and a negative electrode plate are wound with a separator interposed therebetween refers to a flat wound electrode body. A flat wound electrode body is a wound electrode body having a circular cross section in which a positive electrode plate and a negative electrode plate are wound via a separator, and an electrode body compressed in a direction perpendicular to the axial direction, or And an electrode body wound in a race track shape on a flat core. The flat wound electrode body has a cross section perpendicular to the axial direction of the wound electrode body having a pair of long sides facing each other and a pair of curved portions facing each other. Since the flat wound electrode body has excellent volume efficiency, a high-performance battery having excellent volume efficiency can be obtained when the battery is formed.

【００２４】電極端子に接合された突出端部は、厚さ方
向に重ね合わされて厚密化部となっていることが好まし
い。ここで、重ね合わされる厚さ方向とは、突出端部を
構成する未塗布部が配置された状態における、未塗布部
の厚さ方向を示す。また、厚密化部の厚さ方向に重ね合
わされた状態は、突出端部を構成する未塗布部が重ね合
わされた状態であることを示し、一体化された状態ある
いは積層した状態で圧縮された状態であってもよい。す
なわち、複数枚の未塗布部と電極端子を接合することが
でき、電極端子に接合された突出端部が、厚密化部とな
ることで、電極端子と突出端部との接合強度が向上す
る。It is preferable that the protruding ends joined to the electrode terminals are superposed in the thickness direction to form a thickened portion. Here, the thickness direction to be superimposed indicates the thickness direction of the uncoated portion in a state where the uncoated portion constituting the protruding end is arranged. In addition, the state in which the thickened portions are overlapped in the thickness direction indicates that the uncoated portions constituting the protruding end portions are in a state of being overlapped, and are compressed in an integrated state or a stacked state. It may be in a state. That is, a plurality of uncoated portions can be joined to the electrode terminal, and the protruding end portion joined to the electrode terminal becomes a thickened portion, thereby improving the bonding strength between the electrode terminal and the protruding end portion. I do.

【００２５】突出端部は、複数箇所の厚密化部を有する
ことが好ましい。複数箇所の厚密化部とは、突出端部の
厚さ方向に、未塗布部が重ね合わされた厚密化部が複数
箇所形成されたことを示す。突出端部が複数箇所の厚密
化部を有することで、未塗布部の長さを短くすることが
できる。すなわち、複数箇所の厚密化部を有すること
で、厚密化部が形成された位置と電極部との長さを短く
することができ、未塗布部の長さを短縮できる。The projecting end preferably has a plurality of thickened portions. A plurality of thickened portions means that a plurality of thickened portions in which uncoated portions are overlapped are formed in the thickness direction of the protruding end portion. Since the protruding end has a plurality of thickened portions, the length of the uncoated portion can be reduced. That is, by having a plurality of thickened portions, the length of the electrode portion and the position where the thickened portion is formed can be shortened, and the length of the uncoated portion can be shortened.

【００２６】厚密化部は、突出端部の厚さ方向に対して
傾斜した方向に形成されたことが好ましい。厚密化部が
傾斜して形成されることで、突出端部の長さを短くする
ことができる。詳しくは、突出端部の厚密化部は未塗布
部が重ね合わされて形成されているため、厚密化部の重
ね合わされる突出端部の厚さ方向の位置により、必要と
なる未塗布部の長さが異なるようになっていた。このた
め、傾斜して形成することで、厚密化部の径方向の位置
を変化させることができ、未塗布部の長さを短くするこ
とができる。The thickened portion is preferably formed in a direction inclined with respect to the thickness direction of the protruding end. Since the thickened portion is formed inclined, the length of the protruding end portion can be reduced. Specifically, since the thickened portion of the protruding end portion is formed by overlapping the uncoated portion, the required uncoated portion depends on the position in the thickness direction of the overlapping protruding end portion of the thickened portion. Had different lengths. For this reason, by forming it inclining, the radial position of the thickened portion can be changed, and the length of the uncoated portion can be shortened.

【００２７】厚密化部が長辺部にあることが好ましい。
すなわち、扁平形状巻回型電極体においては、突出端部
も扁平巻回形状に形成される。このため、突出端部も軸
方向に垂直な断面が、互いに対向した一対の長辺部と、
互いに対向した一対の湾曲部とからなる扁平形状に形成
される。厚密化部が長辺部に形成されることで、扁平形
状巻回型電極体において、突出端部の厚密化を容易に行
うことができる。It is preferable that the thickened portion is on the long side.
That is, in the flat wound electrode body, the protruding end is also formed in a flat wound shape. For this reason, the protruding end also has a section perpendicular to the axial direction, and a pair of long sides facing each other,
It is formed in a flat shape composed of a pair of curved portions facing each other. Since the thickened portion is formed on the long side, the protruding end of the flat wound electrode body can be easily thickened.

【００２８】対向した一対の長辺部に厚密化部が形成さ
れることが好ましい。一対の長辺部に厚密化部が形成さ
れるとは、それぞれの長辺部に厚密化部が形成されたこ
とを示す。すなわち、対向した長辺部に厚密化部が形成
されることで、互いに対向する長辺部が電極端子に接合
されることとなり、扁平型状巻回型電極体と電極端子の
接合強度が向上する。It is preferable that a thickened portion is formed on a pair of long sides facing each other. Forming a thickened portion on a pair of long sides means that a thickened portion is formed on each of the long sides. That is, since the thickened portions are formed on the opposed long sides, the opposed long sides are joined to the electrode terminals, and the bonding strength between the flat-type wound electrode body and the electrode terminals is reduced. improves.

【００２９】長辺部に形成された厚密化部は、長径方向
に対して傾斜した方向に形成されたことが好ましい。長
辺部に形成された厚密化部が傾斜して形成されること
で、扁平形状巻回型電極体の突出端部の長さを短くする
ことができる。詳しくは、突出端部の厚密化部は未塗布
部が重ね合わされて形成されているため、厚密化部の重
ね合わされる径方向の位置により、必要となる内周面側
と外周面側の未塗布部の長さが異なるようになってい
た。このため、長辺部を傾斜して形成することで、厚密
化部の径方向の位置を変化させることができ、未塗布部
の長さを短くすることができる。The thickened portion formed on the long side is preferably formed in a direction inclined with respect to the major axis direction. Since the thickened portion formed on the long side is formed to be inclined, the length of the protruding end of the flat wound electrode body can be shortened. Specifically, since the thickened portion of the protruding end portion is formed by overlapping the uncoated portion, the inner peripheral surface side and the outer peripheral surface side required according to the radial position where the thickened portion is overlapped Had different lengths of uncoated portions. For this reason, by forming the long side portion to be inclined, the radial position of the thickened portion can be changed, and the length of the uncoated portion can be shortened.

【００３０】電極端子は、軸部と、軸部と一体に形成さ
れ突出端部に接合された突起部と、を有することが好ま
しい。すなわち、軸部と突起部とを電極端子が有するこ
とで、電極体を電極端子により保持することができる。
詳しくは、軸部が、電極端子の剛性を発揮し、突起部が
突出端部に接合される。It is preferable that the electrode terminal has a shaft portion and a projection formed integrally with the shaft portion and joined to the protruding end portion. That is, since the electrode terminal has the shaft portion and the protrusion, the electrode body can be held by the electrode terminal.
Specifically, the shaft portion exerts the rigidity of the electrode terminal, and the projection is joined to the protruding end.

【００３１】突起部は、複数個形成されており、それぞ
れの突起部が突出端部に接合されていることが好まし
い。それぞれが突出端部に接合された複数個の突起部が
形成されることで、電極端子が電極体を強固に保持でき
るようになるとともに電極体が大電流を発生したときに
一つの突起部に流れる電流を低減することができ、突起
部が大電流により過熱損傷を生じることを抑えることが
できる。Preferably, a plurality of protrusions are formed, and each of the protrusions is joined to the protruding end. By forming a plurality of protrusions each joined to the protruding end, the electrode terminal can firmly hold the electrode body and at the same time when the electrode body generates a large current, The flowing current can be reduced, and the overheating damage of the projection due to the large current can be suppressed.

【００３２】軸部は、複数箇所の厚密化部のそれぞれに
対向した状態で突出端部に配置されることが好ましい。
軸部が複数箇所の厚密化部のそれぞれに対向した状態と
は、突出端部が少なくとも２層の厚密化部を有するとき
に、この厚密化部に挟まれた位置に配置されていること
を示す。軸部が複数箇所の厚密化部のそれぞれに対向し
た状態で突出端部に配置されることで、電極端子が電極
体を強固に保持することができるようになる。It is preferable that the shaft is disposed at the protruding end in a state facing each of the plurality of thickened portions.
The state in which the shaft portion faces each of the plurality of thickened portions means that when the protruding end portion has at least two layers of the thickened portions, it is arranged at a position sandwiched by the thickened portions. To indicate that The electrode terminal can firmly hold the electrode body by disposing the shaft portion at the protruding end portion in a state facing each of the plurality of thickened portions.

【００３３】軸部は、一対の長辺部のそれぞれに対向し
た状態で突出端部に配置されることが好ましい。すなわ
ち、電極体が扁平形状巻回型電極体であるときには、一
対の長辺部のそれぞれに対向した状態で軸部が配される
ことで、電極端子が電極体を強固に保持することができ
るようになる。ここで、軸部の配置される一対の長辺部
のそれぞれに対向した状態とは、扁平形状巻回型電極体
の突出端部において、突出端部の扁平巻回形状における
扁平化された軸心部に配置されることを示す。It is preferable that the shaft is disposed at the protruding end in a state of facing the pair of long sides. That is, when the electrode body is a flat wound electrode body, the electrode terminals can firmly hold the electrode body by disposing the shaft portions in a state of facing the pair of long sides. Become like Here, the state in which the shaft portion is opposed to each of the pair of long sides is defined as the flattened shaft in the flat wound shape of the protruding end at the protruding end of the flat wound electrode body. Indicates that it is placed at the core.

【００３４】軸部は、突出端部の外周面に対向した状態
で配置されることが好ましい。軸部が外周面に対向した
状態で配置されることで、架橋部を厚密化部に接合する
加工を容易に行うことができるようになる。It is preferable that the shaft is disposed so as to face the outer peripheral surface of the protruding end. By arranging the shaft portion facing the outer peripheral surface, it is possible to easily perform the process of joining the bridge portion to the thickened portion.

【００３５】軸部は、突出端部の端面に配置されること
が好ましい。突出端部の端面に配置されることで、電極
端子を平板状に形成することができ、電極端子の加工に
よる加工コストを低減することができる。The shaft is preferably arranged on the end face of the protruding end. Since the electrode terminals are arranged on the end face of the protruding end, the electrode terminals can be formed in a flat plate shape, and the processing cost for processing the electrode terminals can be reduced.

【００３６】軸部は、電極体の突出端部の突出した方向
に貫通した貫通孔を有することが好ましい。軸部が貫通
孔を有することで、電解液を電極板間に注入するとき
に、電極端子による電解液の注入の阻害が低減し、電池
の製造に要するコストを低減できる。The shaft preferably has a through-hole penetrating in the direction in which the protruding end of the electrode body protrudes. Since the shaft portion has the through hole, when the electrolyte is injected between the electrode plates, the inhibition of the injection of the electrolyte by the electrode terminals is reduced, and the cost required for manufacturing the battery can be reduced.

【００３７】電極端子は、それぞれ接合される集電体と
同一の材質で形成されることが好ましい。電極端子と集
電体とが同一の材質で形成されることで、電池として使
用するときに電触が生じることを抑えることができる。The electrode terminals are preferably formed of the same material as the current collector to be joined. Since the electrode terminal and the current collector are formed of the same material, it is possible to suppress occurrence of electric contact when used as a battery.

【００３８】本発明の電池は、突出端部の端面に電極端
子を接合しているため、各突出端部に電極端子が外周面
および内周面に接合するための接合しろをもうける必要
がなくなり、突出端部の長さを短縮できる。このため、
電極端子が接合された状態の電極体の軸方向の長さを短
縮できる。この結果、この電極体が用いられた電池の体
格が小型化されている。さらに、突出端部の長さを短く
することができることから、突出端部を形成する電極板
の未塗布部の長さを短くすることができ、材料コストや
重量を低下させることができる。In the battery of the present invention, since the electrode terminals are joined to the end surfaces of the protruding ends, it is not necessary to provide a margin for joining the electrode terminals to the outer peripheral surface and the inner peripheral surface at each protruding end. , The length of the protruding end can be reduced. For this reason,
The axial length of the electrode body in a state where the electrode terminals are joined can be reduced. As a result, the size of the battery using the electrode body is reduced. Further, since the length of the protruding end can be shortened, the length of the uncoated portion of the electrode plate forming the protruding end can be shortened, and the material cost and weight can be reduced.

【００３９】（電池の製造方法）本発明の電池の製造方
法は、電極体と、電極端子と、を、電極体の突出端部の
端面に電極端子を接合する電極端子接合工程を有する電
池の製造方法である。(Method of Manufacturing Battery) The method of manufacturing a battery according to the present invention is directed to a battery having an electrode terminal joining step of joining an electrode body and an electrode terminal to an end face of a protruding end of the electrode body. It is a manufacturing method.

【００４０】電極体は、集電体と、集電体の両面に塗布
された電極活物質と、からなり、電極活物質が塗布され
た電極部と、集電体の幅方向の一方の端部側に形成され
集電体の表面が露出した未塗布部と、を有する帯状の正
極板および負極板と、帯状のセパレータと、からなり、
正極板および負極板が各未塗布部が互いに反対方向に突
出しかつ電極部がセパレータを介した状態で配置され各
未塗布部よりなる突出端部を有する電極体である。The electrode body is composed of a current collector and an electrode active material applied to both sides of the current collector. The electrode portion coated with the electrode active material and one end in the width direction of the current collector. A strip-shaped positive electrode plate and a negative electrode plate having an uncoated portion formed on the side of the current collector and exposing the surface of the current collector, and a strip-shaped separator,
The positive electrode plate and the negative electrode plate are electrode bodies each of which has an uncoated portion protruding in the opposite direction and an electrode portion disposed with a separator interposed therebetween and having a protruding end portion formed of each uncoated portion.

【００４１】すなわち、電極体は、正極板および負極板
が電極活部室が塗布されていない各未塗布部が互いに反
対方向に突出しかつ電極部がセパレータを介した状態で
配置され各未塗布部よりなる突出端部を有する電極体を
有している電池であればよく、電池の種類は特に限定さ
れるものではない。すなわち、電極体は、通常の電池に
用いられる電極体を用いることができ、たとえば、積層
型電極体や、巻回型電極体をあげることができる。この
ため、電極体を形成する正極板、負極板およびセパレー
タにおいても、従来の電池の正極、負極およびセパレー
タに用いられた部材を用いることができる。That is, in the electrode body, the uncoated portions of the positive electrode plate and the negative electrode plate, on which the electrode active portion chambers are not applied, protrude in opposite directions, and the electrode portions are arranged with the separator interposed therebetween. The battery may be any battery having an electrode body having a protruding end portion, and the type of battery is not particularly limited. That is, as the electrode body, an electrode body used in a normal battery can be used, and for example, a laminated electrode body or a wound electrode body can be used. For this reason, the members used for the positive electrode, the negative electrode, and the separator of the conventional battery can also be used for the positive electrode plate, the negative electrode plate, and the separator that form the electrode body.

【００４２】電極端子は、軸部と、軸部と一体に形成さ
れ突出端部と当接する突起部と、からなる部材である。
電極端子が軸部と突起部とから形成されることで電極端
子を電極体に接合することができる。詳しくは、軸部
は、電極端子に剛性を付与し、突起部が電極体の突出端
部に接合される。ここで、突起部の突出高さおよび幅
は、接合される突出端部により適宜決定することができ
る。The electrode terminal is a member comprising a shaft portion and a projection formed integrally with the shaft portion and in contact with the protruding end.
The electrode terminal can be joined to the electrode body by forming the electrode terminal from the shaft portion and the projection. More specifically, the shaft portion imparts rigidity to the electrode terminal, and the projection is joined to the protruding end of the electrode body. Here, the protruding height and width of the protruding portion can be appropriately determined according to the protruding end to be joined.

【００４３】突起部の突出する方向は、電極端子が電極
体の端部に配置された状態で突起部が溶融したときに、
溶融液が突出端部に供給できる方向であればよく、電極
体の突出端部の端面の広がる方向であっても、電極体の
軸方向の端部から突出する方向であっても、両者の方向
の間の傾斜した方向であってもよい。The direction in which the projections protrude is such that when the projections melt while the electrode terminals are disposed at the ends of the electrode body,
Any direction may be used as long as the molten liquid can be supplied to the protruding end portion, whether the direction in which the end surface of the protruding end portion of the electrode body extends or the direction in which the protruding end portion protrudes from the axial end portion of the electrode body. It may be an inclined direction between the directions.

【００４４】電極端子が突起部を有することで、電極端
子が電極体の各突出端部の端面に接合されることができ
る。すなわち、突出端部の未塗布部と電極端子とでは板
厚の差が大きく、溶接などの通常の接合方法では接合す
ることが困難であったが、電極端子が突起部とを有する
ことで、突起部を突出端部に溶接することが可能となっ
た。Since the electrode terminal has the protrusion, the electrode terminal can be joined to the end face of each protruding end of the electrode body. That is, the difference in plate thickness between the uncoated portion of the protruding end portion and the electrode terminal is large, and it is difficult to join by a normal joining method such as welding. However, since the electrode terminal has a protrusion, The projection can be welded to the protruding end.

【００４５】突起部は、複数形成されたことが好まし
い。突起部を複数形成することで、電極端子と扁平型状
巻回型電極体との接合箇所が増加し、両者の接合強度が
向上するとともに電極端子と電極体との接合面積が増大
し、多量の電流が流れることも可能となる。Preferably, a plurality of protrusions are formed. By forming a plurality of projections, the number of joints between the electrode terminal and the flat wound electrode body is increased, the joint strength between them is improved, and the joint area between the electrode terminal and the electrode body is increased. Current can flow.

【００４６】電極端子接合工程は、電極体の突出端部の
端部に電極端子を配置した状態で、突起部を溶融させ、
突起部の溶融液を突出端部の未塗布部に供給した後に溶
融液を固化する工程である。In the electrode terminal joining step, the projection is melted while the electrode terminal is arranged at the end of the protruding end of the electrode body.
This is a step of solidifying the melt after supplying the melt at the protrusion to the uncoated portion at the protruding end.

【００４７】電極端子接合工程により突起部が溶融して
溶融液が突出端部の未塗布部に供給されると、溶融液は
それぞれの未塗布部の界面に浸入するとともに、その熱
により各未塗布部を溶融させ、お互いの溶融液が混合す
る。その後、この溶融液が冷却されると、溶融液が凝固
し、両者が一体に形成された架橋部を形成し、電極端子
と電極体とが接合される。When the protrusions are melted in the electrode terminal joining step and the melt is supplied to the uncoated portions at the protruding ends, the melt penetrates into the interfaces of the respective uncoated portions and is heated by the heat. The application section is melted, and the respective melts are mixed. Thereafter, when the melt is cooled, the melt solidifies to form a bridge portion in which both are integrally formed, and the electrode terminal and the electrode body are joined.

【００４８】また、ここで、突起部の溶融液の未塗布部
への供給は、未塗布部の界面による毛細管現象や、突出
端部の上方に突起部を配置して重力を用いて移動させる
ことで行うことができる。Here, the supply of the melted liquid to the uncoated portion of the projection is performed by capillary action due to the interface of the uncoated portion, or by moving the projection by placing the projection above the protruding end and using gravity. That can be done.

【００４９】突起部は、ＴＩＧ溶接機により溶融される
ことが好ましい。ＴＩＧ溶接機を用いることで、電極端
子および集電体の表面に形成された酸化被膜を除去しな
がら突出端部と電極端子の接合を行うことができる。The projection is preferably melted by a TIG welding machine. By using the TIG welding machine, the protruding end and the electrode terminal can be joined while removing the oxide film formed on the surface of the electrode terminal and the current collector.

【００５０】詳しくは、通常のリチウム二次電池の正極
集電体および正極端子に用いられるアルミニウムは、表
面に電気絶縁性の酸化被膜を有する。ＴＩＧ溶接機を用
いると、このアルミニウム表面の酸化被膜を除去しなが
ら突起部を溶融させることができる。ここで、通常のレ
ーザー溶接等の手段では、酸化被膜を除去することがで
きず、そのままの状態で接合させると電極端子と電極体
との間に電気絶縁性の酸化被膜が残留し、電気伝導性が
阻害される。さらに、大電流が流れるときに過熱損傷を
生じやすくなる。More specifically, aluminum used for a positive electrode current collector and a positive electrode terminal of an ordinary lithium secondary battery has an electrically insulating oxide film on the surface. If a TIG welding machine is used, the protrusion can be melted while removing the oxide film on the aluminum surface. Here, the oxide film cannot be removed by ordinary means such as laser welding, and if the bonding is performed as it is, an electrically insulating oxide film remains between the electrode terminal and the electrode body, and the electric conduction is prevented. Sex is inhibited. Furthermore, when a large current flows, overheating damage is likely to occur.

【００５１】正極板、負極板およびセパレータは帯状の
形状を有し、正極板および負極板がセパレータを介して
巻回された扁平形状巻回型構成を有していることが好ま
しい。正極板および負極板がセパレータを介して巻回さ
れた扁平形状巻回型構成を有している電極体とは、扁平
形状巻回型電極体を示す。扁平形状巻回型電極体は、正
極板および負極板がセパレータを介して巻回された円形
状の断面を有する巻回型電極体が、軸方向に垂直な方向
で圧縮された電極体を示す。扁平形状巻回型電極体は、
巻回型電極体の軸方向に垂直な断面が、互いに対向した
一対の長辺部と、互いに対向した一対の湾曲部と、から
なる断面形状を有する。扁平形状巻回型電極体は、体積
効率に優れているため、電池を形成したときに体積効率
に優れた高性能な電池が得られる。It is preferable that the positive electrode plate, the negative electrode plate, and the separator have a belt-like shape, and have a flat wound configuration in which the positive electrode plate and the negative electrode plate are wound with the separator interposed therebetween. An electrode body having a flat wound configuration in which a positive electrode plate and a negative electrode plate are wound with a separator interposed therebetween refers to a flat wound electrode body. The flat wound electrode body refers to an electrode body in which a wound electrode body having a circular cross section in which a positive electrode plate and a negative electrode plate are wound via a separator is compressed in a direction perpendicular to the axial direction. . The flat wound electrode body is
A cross section perpendicular to the axial direction of the spirally wound electrode body has a cross sectional shape including a pair of long sides facing each other and a pair of curved portions facing each other. Since the flat wound electrode body has excellent volume efficiency, a high-performance battery having excellent volume efficiency can be obtained when the battery is formed.

【００５２】電極端子に接合された突出端部は、厚さ方
向に重ね合わされて厚密化部となっていることが好まし
い。ここで、重ね合わされる厚さ方向とは、突出端部を
構成する未塗布部が配された状態で、未塗布部の厚さ方
向である。また、厚密化部の厚さ方向に重ね合わされた
状態は、突出端部を構成する未塗布部が重ね合わされた
状態であることを示し、一体化された状態あるいは積層
した状態で圧縮された状態であってもよい。すなわち、
複数枚の未塗布部と電極端子を接合することができ、電
極端子に接合された突出端部が、厚密化部となること
で、電極端子と突出端部との接合強度が向上する。It is preferable that the protruding ends joined to the electrode terminals are superposed in the thickness direction to form a thickened portion. Here, the thickness direction to be overlapped is the thickness direction of the uncoated portion in a state where the uncoated portion constituting the protruding end portion is arranged. In addition, the state in which the thickened portions are overlapped in the thickness direction indicates that the uncoated portions constituting the protruding end portions are in a state of being overlapped, and are compressed in an integrated state or a stacked state. It may be in a state. That is,
A plurality of uncoated portions can be joined to the electrode terminal, and the protruding end joined to the electrode terminal becomes a thickened portion, so that the bonding strength between the electrode terminal and the protruding end is improved.

【００５３】突出端部は、複数箇所の厚密化部を有する
ことが好ましい。複数箇所の厚密化部とは、突出端部の
厚さ方向に、未塗布部が重ね合わされた厚密化部が複数
層形成されたことを示す。突出端部が複数箇所の厚密化
部を有することで、未塗布部の長さを短くすることがで
きる。すなわち、複数箇所の厚密化部を有することで、
厚密化部が形成された位置と電極部との長さを短くする
ことができ、未塗布部の長さを短縮できる。The protruding end preferably has a plurality of thickened portions. The plurality of thickened portions indicates that a plurality of thickened portions in which uncoated portions are overlapped are formed in the thickness direction of the protruding end portion. Since the protruding end has a plurality of thickened portions, the length of the uncoated portion can be reduced. That is, by having a plurality of thickened portions,
The length of the position where the thickened portion is formed and the length of the electrode portion can be shortened, and the length of the uncoated portion can be shortened.

【００５４】厚密化部は、突出端部の厚さ方向に対して
傾斜した方向に形成されたことが好ましい。厚密化部が
傾斜して形成されることで、突出端部の長さを短くする
ことができる。詳しくは、突出端部の厚密化部は未塗布
部が重ね合わされて形成されているため、厚密化部の重
ね合わされる突出端部の厚さ方向の位置により、必要と
なる未塗布部の長さが異なるようになっていた。このた
め、傾斜して形成することで、厚密化部の径方向の位置
を変化させることができ、未塗布部の長さを短くするこ
とができる。It is preferable that the thickened portion is formed in a direction inclined with respect to the thickness direction of the protruding end. Since the thickened portion is formed inclined, the length of the protruding end portion can be reduced. Specifically, since the thickened portion of the protruding end portion is formed by overlapping the uncoated portion, the required uncoated portion depends on the position in the thickness direction of the overlapping protruding end portion of the thickened portion. Had different lengths. For this reason, by forming it inclining, the radial position of the thickened portion can be changed, and the length of the uncoated portion can be shortened.

【００５５】厚密化部が長辺部にあることが好ましい。
すなわち、扁平形状巻回型電極体においては、突出端部
も扁平巻回形状に形成される。このため、突出端部も軸
方向に垂直な断面が、互いに対向した一対の長辺部と、
互いに対向した一対の湾曲部とからなる扁平形状に形成
される。厚密化部が長辺部に形成されることで、扁平形
状巻回型電極体において、突出端部の厚密化を容易に行
うことができる。It is preferable that the thickened portion is on the long side.
That is, in the flat wound electrode body, the protruding end is also formed in a flat wound shape. For this reason, the protruding end also has a section perpendicular to the axial direction, and a pair of long sides facing each other,
It is formed in a flat shape composed of a pair of curved portions facing each other. Since the thickened portion is formed on the long side, the protruding end of the flat wound electrode body can be easily thickened.

【００５６】対向した一対の長辺部に厚密化部が形成さ
れることが好ましい。一対の長辺部に厚密化部が形成さ
れるとは、それぞれの長辺部に厚密化部が形成されたこ
とを示す。すなわち、対向した長辺部に厚密化部が形成
されることで、互いに対向する長辺部が電極端子に接合
されることとなり、扁平型状巻回型電極体と電極端子の
接合強度が向上する。It is preferable that a thickened portion is formed on a pair of long sides facing each other. Forming a thickened portion on a pair of long sides means that a thickened portion is formed on each of the long sides. That is, since the thickened portions are formed on the opposed long sides, the opposed long sides are joined to the electrode terminals, and the bonding strength between the flat-type wound electrode body and the electrode terminals is reduced. improves.

【００５７】長辺部に形成された厚密化部は、長径方向
に対して傾斜した方向に形成されたことが好ましい。長
辺部に形成された厚密化部が傾斜して形成されること
で、扁平形状巻回型電極体の突出端部の長さを短くする
ことができる。詳しくは、突出端部の厚密化部は未塗布
部が重ね合わされて形成されているため、厚密化部の重
ね合わされる径方向の位置により、必要となる内周面側
と外周面側の未塗布部の長さが異なるようになってい
た。このため、長辺部を傾斜して形成することで、厚密
化部の径方向の位置を変化させることができ、未塗布部
の長さを短くすることができる。The thickened portion formed on the long side portion is preferably formed in a direction inclined with respect to the major axis direction. Since the thickened portion formed on the long side is formed to be inclined, the length of the protruding end of the flat wound electrode body can be shortened. Specifically, since the thickened portion of the protruding end portion is formed by overlapping the uncoated portion, the inner peripheral surface side and the outer peripheral surface side required according to the radial position where the thickened portion is overlapped Had different lengths of uncoated portions. For this reason, by forming the long side portion to be inclined, the radial position of the thickened portion can be changed, and the length of the uncoated portion can be shortened.

【００５８】軸部は、複数箇所の厚密化部のそれぞれに
対向した状態で突出端部に配置されることが好ましい。
軸部が複数箇所の厚密化部のそれぞれに対向した状態と
は、突出端部が少なくとも２層の厚密化部を有するとき
に、この厚密化部に挟まれた位置に配置されていること
を示す。軸部が複数箇所の厚密化部のそれぞれに対向し
た状態で突出端部に配置されることで、電極端子が電極
体を強固に保持することができるようになる。It is preferable that the shaft portion is disposed at the protruding end in a state of facing each of the plurality of thickened portions.
The state in which the shaft portion faces each of the plurality of thickened portions means that when the protruding end portion has at least two layers of the thickened portions, it is arranged at a position sandwiched by the thickened portions. To indicate that The electrode terminal can firmly hold the electrode body by disposing the shaft portion at the protruding end portion in a state facing each of the plurality of thickened portions.

【００５９】軸部は、一対の長辺部のそれぞれに対向し
た状態で突出端部に配置されることが好ましい。すなわ
ち、電極体が扁平形状巻回型電極体であるときには、一
対の長辺部のそれぞれに対向した状態で軸部が配される
ことで、電極端子が電極体を強固に保持することができ
るようになる。ここで、軸部の配置される一対の長辺部
のそれぞれに対向した状態とは、扁平形状巻回型電極体
の突出端部において、突出端部の扁平巻回形状における
扁平化された軸心部に配置されることを示す。It is preferable that the shaft is disposed at the protruding end in a state of facing the pair of long sides. That is, when the electrode body is a flat wound electrode body, the electrode terminals can firmly hold the electrode body by disposing the shaft portions in a state of facing the pair of long sides. Become like Here, the state in which the shaft portion is opposed to each of the pair of long sides is defined as the flattened shaft in the flat wound shape of the protruding end at the protruding end of the flat wound electrode body. Indicates that it is placed at the core.

【００６０】軸部は、突出端部の外周面に対向した状態
で配置されることが好ましい。軸部が外周面に対向した
状態で配置されることで、架橋部を厚密化部に接合する
加工を容易に行うことができるようになる。It is preferable that the shaft is disposed so as to face the outer peripheral surface of the protruding end. By arranging the shaft portion facing the outer peripheral surface, it is possible to easily perform the process of joining the bridge portion to the thickened portion.

【００６１】軸部は、突出端部の端面に配置されること
が好ましい。突出端部の端面に配置されることで、電極
端子を平板状に形成することができ、電極端子の加工に
よる加工コストを低減することができる。The shaft is preferably arranged on the end face of the protruding end. Since the electrode terminals are arranged on the end face of the protruding end portion, the electrode terminals can be formed in a flat plate shape, and the processing cost for processing the electrode terminals can be reduced.

【００６２】軸部は、電極体の突出端部の突出した方向
に貫通した貫通孔を有することが好ましい。軸部が貫通
孔を有することで、電解液を電極板間に注入するとき
に、電極端子による電解液の注入の阻害が低減し、電池
の製造に要するコストを低減できる。The shaft preferably has a through-hole penetrating in the direction in which the protruding end of the electrode body protrudes. Since the shaft portion has the through hole, when the electrolyte is injected between the electrode plates, the inhibition of the injection of the electrolyte by the electrode terminals is reduced, and the cost required for manufacturing the battery can be reduced.

【００６３】電極端子は、それぞれ接合される集電体と
同一の材質で形成されることが好ましい。電極端子と集
電体とが同一の材質で形成されることで、電池として使
用するときに電触が生じることを抑えることができる。
すなわち、電極端子と集電体とが異種材料であると、電
位差により電触が生じるためである。The electrode terminals are preferably formed of the same material as the current collector to be joined. Since the electrode terminal and the current collector are formed of the same material, it is possible to suppress occurrence of electric contact when used as a battery.
That is, if the electrode terminal and the current collector are made of different materials, electric contact occurs due to a potential difference.

【００６４】本発明の扁平型状巻回型電極電池の製造方
法は、突出端部の端部に電極端子を接合することができ
る。このため、各突出端部に電極端子が外周面および内
周面に接合するための接合しろをもうける必要がなくな
り、突出端部の長さを短縮できる。この結果、この電極
体が用いられた電池の体格が小型化されている。さら
に、突出端部の長さを短くすることができることから、
突出端部を形成する電極板の未塗布部の長さを短くする
ことができ、材料コストや重量を低下させることができ
る。In the method of manufacturing a flat wound electrode battery according to the present invention, an electrode terminal can be joined to the end of the protruding end. For this reason, it is not necessary to provide a margin for joining the electrode terminal to the outer peripheral surface and the inner peripheral surface at each protruding end, and the length of the protruding end can be reduced. As a result, the size of the battery using the electrode body is reduced. Furthermore, since the length of the protruding end can be shortened,
The length of the uncoated portion of the electrode plate forming the protruding end can be reduced, and the material cost and weight can be reduced.

【００６５】[0065]

【実施例】以下、実施例を用いて本発明を説明する。The present invention will be described below with reference to examples.

【００６６】本発明の実施例として、扁平形状巻回型電
極体を有する電池を作成した。As an example of the present invention, a battery having a flat wound electrode body was prepared.

【００６７】（実施例１）実施例１は、図１に示され
た、正極板２、負極板３およびセパレータ４を有する扁
平形状巻回型電極体１と、扁平形状巻回型電極体１の巻
回軸の両端面のそれぞれに接合された正極端子５５およ
び負極端子５６よりなる電極端子５と、を有する電池で
ある。Example 1 In Example 1, the flat wound electrode body 1 having the positive electrode plate 2, the negative electrode plate 3 and the separator 4 shown in FIG. And an electrode terminal 5 composed of a positive electrode terminal 55 and a negative electrode terminal 56 joined to both end surfaces of the winding shaft.

【００６８】扁平形状巻回型電極体１は、帯状の正極板
２および負極板３と両極板２、３間に介在するセパレ−
タ４とが巻回された状態で扁平形状に成形された電極体
である。The flat wound electrode body 1 is composed of a strip-shaped positive electrode plate 2 and a negative electrode plate 3 and a separator interposed between the two electrode plates 2 and 3.
And an electrode body formed into a flat shape in a state in which the electrode 4 is wound.

【００６９】正極板２は、帯状のアルミニウムシートか
らなる正極集電体の両面に正極活物質層２１が形成され
るとともに、正極集電体の幅方向の一方の端部側に正極
活物質層２１が形成されていない未塗布部２２を有す
る。この未塗布部２２は、端部側から一定の幅で形成さ
れていた。また、正極活物質はリチウムマンガン酸化物
が用いられた。The positive electrode plate 2 has a positive electrode active material layer 21 formed on both sides of a positive electrode current collector made of a belt-shaped aluminum sheet, and a positive electrode active material layer 21 on one end side in the width direction of the positive electrode current collector. There is an uncoated portion 22 where no 21 is formed. The uncoated portion 22 was formed with a constant width from the end. In addition, a lithium manganese oxide was used as the positive electrode active material.

【００７０】負極板３は、帯状の銅のシートからなる負
極集電体の両面に負極活物質層３１が形成されるととも
に、負極集電体の幅方向の一方の端部側に負極活物質層
３１が形成されていない未塗布部３２を有する。この未
塗布部３２は、端部側から一定の幅で形成されていた。
また、負極活物質には、カーボンが用いられた。The negative electrode plate 3 has a negative electrode active material layer 31 formed on both sides of a negative electrode current collector made of a strip-shaped copper sheet, and a negative electrode active material layer on one end side in the width direction of the negative electrode current collector. There is an uncoated portion 32 where the layer 31 is not formed. The uncoated portion 32 was formed with a constant width from the end.
Further, carbon was used as the negative electrode active material.

【００７１】セパレ−タ４は、帯状に形成された微多孔
性のポリエチレンまたはポリプロピレンにより形成され
ている。すなわち、両極板２、３の電極活物質層２１、
３１が形成された領域よりも帯の幅が長く、かつ長さも
両極板２、３よりも長く形成されている。The separator 4 is made of a strip of microporous polyethylene or polypropylene. That is, the electrode active material layers 21 of the bipolar plates 2 and 3
The width of the band is longer than that of the region where 31 is formed, and the length is longer than the bipolar plates 2 and 3.

【００７２】扁平形状巻回型電極体１は、正極板２およ
び負極板３の未塗布部２２、３２が互いに軸方向の反対
方向にセパレータ４から突出し、巻回されてリング状に
形成された突出端部２３、３３を形成している。各突出
端部２３、３３の長辺部は、積層した未塗布部２２、３
２が圧縮されて厚密化部２４、３４を形成している。ま
た、突出端部２３、３３は、巻回軸の軸心部に、一対の
厚密化部に挟まれた長径方向に扁平形状の中空部を有し
ている。ここで、扁平形状巻回型電極体１を構成する正
極板２、負極板３およびセパレータ４が積層した状態を
図２に示した。In the flat wound electrode body 1, the uncoated portions 22 and 32 of the positive electrode plate 2 and the negative electrode plate 3 project from the separator 4 in directions opposite to each other in the axial direction, and are wound into a ring shape. Protruding ends 23 and 33 are formed. The long side of each protruding end 23, 33 is
2 are compressed to form the densified portions 24 and 34. In addition, the protruding ends 23 and 33 have a flat hollow portion in the major axis direction sandwiched between the pair of thickened portions at the axis of the winding shaft. Here, FIG. 2 shows a state in which the positive electrode plate 2, the negative electrode plate 3, and the separator 4 constituting the flat wound electrode body 1 are stacked.

【００７３】電極端子５は、金属板を所定形状に形成し
た後に曲成して形成された部材であり、扁平形状巻回型
電極体１の突出端部２３、３３の積層した端面に接合さ
れた部材である。電極端子５は、突出端部２３、３３の
軸心部の中空部に長径方向に延材した状態で保持される
とともに突出端部２３、３３の長径方向に対して垂直な
方向の両端側の側端部５３が突出端部２３、３３の端部
方向に折り曲げられた軸部５１と、軸部５１の長辺部と
の対向部である側端部５３から突出し、積層した突出端
部２３、３３に一体に接合された互いに対向する合計８
個の架橋部５２と、を有する。The electrode terminal 5 is a member formed by forming a metal plate into a predetermined shape and then bending the metal plate. The electrode terminal 5 is joined to the laminated end surface of the protruding end portions 23 and 33 of the flat wound electrode body 1. It is a member. The electrode terminals 5 are held in the hollow portions of the axial centers of the protruding ends 23, 33 in a state of extending in the major axis direction, and are provided at both ends in the direction perpendicular to the major axis direction of the protruding ends 23, 33. The side end 53 protrudes from the shaft end 51 bent in the direction of the end of the protruding ends 23, 33 and the side end 53 which is a portion facing the long side of the shaft 51, and is stacked. , 33, a total of 8 opposed to each other integrally joined to
And two bridge portions 52.

【００７４】ここで、電極端子５は、それぞれが接合さ
れる集電体と同種の材質で形成された。詳しくは、正極
端子５５側の電極端子５はアルミニウムよりなり、負極
端子５６側の電極端子５は銅により形成された。Here, the electrode terminals 5 were formed of the same material as the current collector to be joined. Specifically, the electrode terminal 5 on the positive electrode terminal 55 side was formed of aluminum, and the electrode terminal 5 on the negative electrode terminal 56 side was formed of copper.

【００７５】（電極体と電極端子の接合）実施例１の電
池において、扁平形状巻回型電極体１と電極端子５の接
合は、電極端子５を扁平形状巻回型電極体１の端面部に
配置した状態で、電極端子５を溶融させ溶融液を突出端
部に供給し、その後、溶融液を冷却固化することで行わ
れた。このときの様子を図３〜６に示した。(Joining of Electrode Body and Electrode Terminal) In the battery of Example 1, the flat wound electrode body 1 and the electrode terminal 5 were joined by connecting the electrode terminal 5 to the end face of the flat wound electrode body 1. In this state, the electrode terminals 5 were melted, the molten liquid was supplied to the protruding ends, and then the molten liquid was cooled and solidified. The situation at this time is shown in FIGS.

【００７６】また、扁平形状巻回型電極体１に接合され
た電極端子５は、長径方向に延在する軸部５１と軸部５
１の両側面部に突出して形成された８個の突起部５４と
を有する部材が用いられた。The electrode terminal 5 joined to the flat wound electrode body 1 has a shaft portion 51 extending in the major diameter direction and a shaft portion 5.
A member having eight protruding portions 54 protruding from both side surfaces of one was used.

【００７７】実施例１の扁平形状巻回型電極体１の作成
方法は巻回型電極体を形成した後に扁平型状に圧縮して
製造された。The flat wound electrode body 1 of Example 1 was manufactured by forming a wound electrode body and then compressing it into a flat shape.

【００７８】詳しくは、まず、円筒もしくはオーバル形
状の巻芯を用い、この巻芯の外周面側に正極板２、負極
板３およびセパレータ４を巻回する。その後、巻芯を取
り外すことで、巻回型電極体が製造された。その後、こ
の巻回型電極体を外周面から径方向内方に圧縮すること
で巻回型電極体の扁平化を行った。More specifically, first, a cylindrical or oval core is used, and the positive electrode plate 2, the negative electrode plate 3, and the separator 4 are wound around the outer peripheral surface of the core. Thereafter, the wound core was removed to manufacture a wound electrode body. Thereafter, the wound electrode body was flattened by compressing the wound electrode body radially inward from the outer peripheral surface.

【００７９】その後、扁平型状巻回型電極体１の軸方向
の両端部に形成された突出端部２３、３３の互いに対向
する長辺部を径方向に圧縮し、対向した厚密化部２４、
３４を形成するとともに、軸心部に中空部を形成した。Thereafter, the opposing long sides of the protruding ends 23, 33 formed at both ends in the axial direction of the flat wound electrode body 1 are compressed in the radial direction, and the opposing thickened portions are compressed. 24,
In addition to forming No. 34, a hollow portion was formed in the axial center portion.

【００８０】その後、突出端部２３、３３の端面に電極
端子５を接合した。以下、正極端子５５を有する電極端
子５の接合を説明する。Thereafter, the electrode terminals 5 were joined to the end surfaces of the protruding ends 23 and 33. Hereinafter, the joining of the electrode terminal 5 having the positive electrode terminal 55 will be described.

【００８１】軸心部の中空部に正極端子５５の軸部５１
が挿入された状態で、正極端子５５が突出端部２３の端
面に保持された。このとき、突起部５４は突出端部２３
の最内周面の端部と当接した状態にあった。その後、正
極端子５５および突出端部２３を径方向外方から一対の
押圧部材６、６で径方向内方に押圧することで、正極端
子５５の軸部５１が突出端部２３の中空部に固定された
（図５）。The shaft portion 51 of the positive electrode terminal 55 is inserted into the hollow portion of the shaft center.
Is inserted, the positive electrode terminal 55 is held on the end face of the protruding end 23. At this time, the protruding portion 54 is
Was in contact with the end of the innermost peripheral surface of. Thereafter, the positive electrode terminal 55 and the protruding end 23 are pressed inward in the radial direction by a pair of pressing members 6 and 6 from the outside in the radial direction, so that the shaft portion 51 of the positive electrode terminal 55 becomes Fixed (FIG. 5).

【００８２】正極端子５５が固定された状態で、正極端
子５５の突起部５４をＴＩＧ溶接機により加熱し、溶融
させた。突起部５４の溶融液は、当接した突出端部２３
に毛細管現象等により供給され、積層した複数の未塗布
部２２の界面に供給される（図６）。With the positive electrode terminal 55 fixed, the projection 54 of the positive electrode terminal 55 was heated and melted by a TIG welding machine. The molten liquid of the projection 54 is brought into contact with the projecting end 23
Is supplied by capillary action or the like, and is supplied to the interface between the stacked uncoated portions 22 (FIG. 6).

【００８３】その後、溶融液を冷却し、凝固させること
で、突起部５４と未塗布部２２とが一体になった架橋部
５２が形成され、正極端子５５が扁平形状巻回型電極体
１の端面に電気的に接合された。なお、負極端子５６を
有する電極端子５においても、上述と同様な方法により
突起部５４を積層した未塗布部３２に電気的に接合し
た。Thereafter, the molten liquid is cooled and solidified to form a bridging portion 52 in which the projecting portion 54 and the uncoated portion 22 are integrated, and the positive electrode terminal 55 is connected to the flat-shaped wound electrode body 1. It was electrically connected to the end face. The electrode terminal 5 having the negative electrode terminal 56 was also electrically connected to the uncoated portion 32 where the protrusions 54 were laminated by the same method as described above.

【００８４】実施例１の電池は、この扁平形状巻回型電
極体１を電解液とともにケースに封入して形成された。The battery of Example 1 was formed by enclosing the flat wound electrode body 1 in a case together with an electrolytic solution.

【００８５】実施例１の電池は、扁平形状巻回型電極体
の突出端部の端面上において電極端子を電気的に接合す
るため、突出端部の側面で電極端子を接合した従来の場
合に比べて、突出端部の突出長さを短くすることができ
るため、扁平形状巻回型電極体の体格が小型化されてい
る。さらに、扁平形状巻回型電極体の体格の小型化は、
電池の体格を小型化できることを示す。In the battery of Example 1, the electrode terminals are electrically joined on the end face of the protruding end of the flat wound electrode body. In comparison, since the protruding length of the protruding end portion can be shortened, the size of the flat wound electrode body is reduced. Furthermore, miniaturization of the physique of the flat wound electrode body has
This shows that the size of the battery can be reduced.

【００８６】（実施例２）実施例２の電池は、図７に示
されたように、突出端部２３、３３の厚密化部２４、３
４が傾斜して形成されるとともに電極端子５の側端部５
３が傾斜して形成されている以外は実施例１と同様な構
成の電池である。なお、一対の厚密化部２４、３４は、
長径に対して線対称な状態で形成された。(Embodiment 2) As shown in FIG. 7, the battery of Embodiment 2 has thickened portions 24, 3 of protruding ends 23, 33.
4 is formed to be inclined and the side end 5 of the electrode terminal 5 is formed.
This is a battery having the same configuration as in Example 1 except that the battery 3 is formed to be inclined. In addition, the pair of thickening portions 24 and 34
It was formed in a state of line symmetry with respect to the major axis.

【００８７】実施例２の電極端子５は、側端部５３が厚
密化部２４、３４の傾斜した形状に対応する傾斜した形
状に形成された以外は実施例１の電極端子５と同様な電
極端子である。The electrode terminal 5 of the second embodiment is the same as the electrode terminal 5 of the first embodiment except that the side end 53 is formed in an inclined shape corresponding to the inclined shape of the thickened portions 24, 34. It is an electrode terminal.

【００８８】実施例２の扁平形状巻回型電極体１の端面
と電極端子５の接合は、実施例１と同様の手段により行
われた。ここで、図８に正極端子５５を突出端部２３に
固定した状態の図を示した。The end face of the flat wound electrode body 1 of the second embodiment and the electrode terminal 5 were joined by the same means as in the first embodiment. Here, FIG. 8 shows a state where the positive electrode terminal 55 is fixed to the protruding end 23.

【００８９】実施例２の電池は、厚密化部２４、３４が
傾斜して形成されているため、突出端部２２、２３の長
さを短くしても、電極端子５の軸部５１の先端部付近で
は、内周面側の未塗布部の端部がより突起部５４と接触
し、軸部５１の基端部付近では、外周面側の未塗布部の
端部がより突起部５４と接触するようになる。したがっ
て、突出端部２２、２３の長さを短くすることができ
る。In the battery of Example 2, since the thickened portions 24 and 34 are formed to be inclined, even if the lengths of the protruding end portions 22 and 23 are reduced, the shaft portion 51 of the electrode terminal 5 is formed. In the vicinity of the distal end, the end of the uncoated portion on the inner peripheral surface side is in more contact with the protrusion 54, and near the base end of the shaft portion 51, the end of the uncoated portion on the outer peripheral surface is more in contact with the protrusion 54. Comes into contact with Therefore, the lengths of the protruding ends 22 and 23 can be reduced.

【００９０】（実施例３）実施例３は、図９に示された
ように、電極端子５の軸部５１が、扁平形状巻回型電極
体１の外周面の長辺部に対向した２本の軸部５１１、５
１１と軸部５１１、５１１の突出端部２３、３３と対向
した側端部５３が扁平形状巻回型電極体１の長径方向に
対して傾斜して形成されている以外は実施例２と同様な
構成の電池である。(Embodiment 3) In Embodiment 3, as shown in FIG. 9, the shaft portion 51 of the electrode terminal 5 is opposed to the long side of the outer peripheral surface of the flat wound electrode body 1. Shafts 511, 5
Example 2 is the same as that of Example 2 except that the side end 53 facing the projecting ends 23 and 33 of the shaft portions 511 and 511 is formed to be inclined with respect to the major axis direction of the flat wound electrode body 1. This is a battery having a simple configuration.

【００９１】実施例３の電極端子５は、略コ字状に形成
され互いに対向し突出端部２３、３３を挟む一対の軸部
５１１、５１１と、軸部５１１、５１１から突出した突
起部が溶融して複数の未塗布部２２、３２の間に入り込
んで凝固した架橋部５２と、を有する。The electrode terminal 5 of the third embodiment has a pair of shafts 511 and 511 which are formed in a substantially U-shape and are opposed to each other and sandwich the protruding ends 23 and 33, and a protrusion protruding from the shafts 511 and 511. A bridging portion 52 that has melted and enters between the uncoated portions 22 and 32 and solidifies.

【００９２】実施例３の扁平形状巻回型電極体１と電極
端子５の接合は、実施例１と同様の手段により行われ
た。すなわち、電極端子５を突出端部２３、３３の所定
の位置に保持し、突起部５４を溶融した後に冷却するこ
とで行われた。このとき、扁平形状巻回型電極体１の軸
心の中空部には、厚密化部２４を径方向外方に押圧する
押圧部材（図示せず）が配された。また、実施例３の電
極体１と電極端子５との接合は、突出端部２３、３３の
外周面に冷却板を配した状態で行われた。ここで、図１
０に正極端子５５を有する電極端子５を突出端部２３に
固定した状態の図を示した。The flat wound electrode body 1 of Example 3 and the electrode terminal 5 were joined by the same means as in Example 1. That is, the electrode terminals 5 were held at predetermined positions of the protruding ends 23 and 33, and the projections 54 were melted and then cooled. At this time, a pressing member (not shown) for pressing the thickened portion 24 outward in the radial direction was arranged in the hollow portion of the axis of the flat wound electrode body 1. In addition, the connection between the electrode body 1 and the electrode terminal 5 in Example 3 was performed in a state where cooling plates were arranged on the outer peripheral surfaces of the protruding ends 23 and 33. Here, FIG.
FIG. 2 shows a state in which the electrode terminal 5 having the positive electrode terminal 55 is fixed to the protruding end 23.

【００９３】実施例３の扁平形状巻回型電極体１と電極
端子５の接合は、電極端子５の軸部５１１と押圧部材
（図示せず）との間で突出端部２３、３３を挟んだ状態
で行われる。また、実施例３の電池の製造においては、
電極端子５と扁平形状巻回型電極体１との接合時に突出
端部２３、３３を冷却する冷却板を用いているため、接
合時の溶融液の熱の電極活物質への伝導が抑えられ、電
極活物質の熱による損傷を抑えることができる。The flat wound electrode body 1 of the third embodiment and the electrode terminal 5 are joined by sandwiching the protruding ends 23 and 33 between the shaft 511 of the electrode terminal 5 and a pressing member (not shown). It is performed in a state. In the manufacture of the battery of Example 3,
Since the cooling plate for cooling the protruding ends 23 and 33 is used when the electrode terminal 5 and the flat wound electrode body 1 are joined, conduction of the heat of the molten liquid to the electrode active material at the time of joining is suppressed. In addition, damage of the electrode active material due to heat can be suppressed.

【００９４】（実施例４）実施例４は、図１１に示され
たように、軸部５１が平板状に形成された電極端子５を
有する電池である。なお、実施例４は、電極端子５の形
状が異なる以外は実施例１と同様な構成の電池である。Embodiment 4 Embodiment 4 is a battery having an electrode terminal 5 in which a shaft 51 is formed in a flat plate shape as shown in FIG. Example 4 is a battery having the same configuration as that of Example 1 except that the shape of the electrode terminal 5 is different.

【００９５】詳しくは、実施例４の電極端子５は、軸部
５１が突出端部２３、３３の端面に軸心部の長径方向に
沿って配置され、厚密化部２４、３４を横断した状態で
厚密化部２４、３４と一体に形成された架橋部５２を有
する。More specifically, in the electrode terminal 5 of the fourth embodiment, the shaft portion 51 is disposed on the end surfaces of the protruding ends 23 and 33 along the major axis direction of the shaft center portion, and crosses the thickening portions 24 and 34. In this state, a bridging portion 52 is formed integrally with the thickening portions 24 and 34.

【００９６】実施例４の扁平型状巻回型電極体１と電極
端子５の接合は、軸部５１および突起部５４が平面上に
形成された電極端子５を扁平型状巻回型電極体１の端面
に配置した状態で、突起部５４を溶融し、架橋部５２を
形成することで行われた。具体的な溶融手段等は、実施
例１と同様にして行われた。ここで、図１２に電極端子
５を突出端部２３に配置した状態の図を示した。In the fourth embodiment, the flat wound electrode body 1 and the electrode terminal 5 are joined by connecting the electrode terminal 5 having the shaft portion 51 and the projection 54 formed on a plane to the flat wound electrode body 5. This was performed by melting the projections 54 and forming the bridges 52 in a state where the bridges 52 were disposed on the end face of the first. Specific melting means and the like were performed in the same manner as in Example 1. Here, FIG. 12 shows a state in which the electrode terminals 5 are arranged on the protruding end portions 23.

【００９７】実施例４の電池は、電極端子５の軸部５１
を平板状に形成しているため、電極端子５の形成にコス
トがかからなくなり、電池に要するコストを低減させる
ことができる。The battery of the fourth embodiment is different from the battery of the fourth embodiment in that
Is formed in a flat plate shape, the cost for forming the electrode terminal 5 is eliminated, and the cost required for the battery can be reduced.

【００９８】（実施例５）実施例５は、図１３に示され
たように、互いに対向した一対の長辺部に形成された厚
密化部２４、３４がそれぞれ２層に形成され、軸部５１
の側端部５３が略傾斜して形成された以外は、実施例４
と同様な構成の電池である。(Embodiment 5) In Embodiment 5, as shown in FIG. 13, thickened portions 24 and 34 formed on a pair of long sides opposed to each other are formed in two layers, respectively. Part 51
Example 4 except that the side end portion 53 was formed substantially inclined.
This is a battery having the same configuration as that of FIG.

【００９９】実施例５の扁平形状巻回型電極体１と電極
端子５の接合は、実施例４と同様の手段により行われ
た。ここで、図１４に電極端子５を突出端部２３に配置
した状態の図を示した。The flat wound electrode body 1 of Example 5 and the electrode terminal 5 were joined by the same means as in Example 4. Here, FIG. 14 shows a state in which the electrode terminals 5 are arranged on the protruding end portions 23.

【０１００】実施例５の電池は、櫛歯状の型を用いて突
出端部２３、３３の厚密化部２４、３４を４層に形成し
た状態で電極端子５を電気的に接合してある。このよう
な構成の扁平形状巻回型電極体１は、突出端部２３、３
３の長さをより短くできる。すなわち、厚密化部２４、
３４を４層に形成し、かつ、電極端子５の軸部５１の先
端部では幅狭に、基端部側では幅広になるように軸部５
１を略傾斜状に形成したことで、電極端子５の軸部５１
の先端部付近では、内周面側の未塗布部２２、３２の端
部がより電極端子５の突起部５４と接触し、軸部５１の
基端部付近では、外周面側の未塗布部２２、３２の端部
がより電極端子５の突起部５４と接触するため、未塗布
部２２、３２の変形を大きくして均一な形状の厚密化部
２４、３４を形成する場合に比べてその変形分を確保す
るべく未塗布部２２、３２の長さ、すなわち、突出端部
２３、３３の長さを短くすることができる。In the battery of Example 5, the electrode terminals 5 were electrically joined in a state where the thickened portions 24 and 34 of the protruding ends 23 and 33 were formed in four layers using a comb-shaped mold. is there. The flat-shaped wound electrode body 1 having such a configuration has the protruding ends 23, 3
3 can be made shorter. That is, the thickening portion 24,
34 are formed in four layers, and the width of the shaft 5 is increased at the distal end of the shaft 51 of the electrode terminal 5 and wide at the base end.
1 is formed in a substantially inclined shape, so that the shaft portion 51 of the electrode terminal 5 is formed.
In the vicinity of the tip end, the ends of the uncoated portions 22 and 32 on the inner peripheral surface are in more contact with the projections 54 of the electrode terminals 5, and near the base end of the shaft portion 51, the uncoated portions on the outer peripheral surface are Since the ends of the portions 22 and 32 are in more contact with the protruding portions 54 of the electrode terminals 5, the deformation of the uncoated portions 22 and 32 is increased and the thickened portions 24 and 34 having a uniform shape are formed. The length of the uncoated portions 22, 32, that is, the length of the protruding end portions 23, 33 can be shortened to secure the deformation.

【０１０１】（実施例６）実施例６は、図１５に示され
たように、突出端部２３、３３が扁平形状巻回型電極体
１の厚さ方向に対して、厚密化部２４が５層に形成され
た以外は実施例５と同様な構成の電池である。(Embodiment 6) In Embodiment 6, as shown in FIG. 15, the protruding ends 23 and 33 are formed in the thickness direction of the flat wound electrode body 1 in the thickness direction. Is a battery having the same configuration as in Example 5 except that the battery was formed in five layers.

【０１０２】実施例６の扁平形状巻回型電極体１は、扁
平型状巻回型電極体１の扁平された厚さ方向に対して、
厚密化部２４、３４が５層に形成されている。また、最
内周面側の未塗布部２２、３２が重ね合わされた状態で
厚密化されたため、軸心部の中空部は形成されなかっ
た。The flat spirally wound electrode body 1 according to the sixth embodiment has the flattened spirally wound electrode body 1 in the flat thickness direction.
The thickened portions 24 and 34 are formed in five layers. Further, since the uncoated portions 22 and 32 on the innermost peripheral surface side were densified in a state of being overlapped, a hollow portion at the axial center portion was not formed.

【０１０３】実施例６の電極端子５は、軸部５１および
架橋部５２が突出端部２３、３３の端面に形成され、か
つ軸部５１の側端部５３および架橋部５２が長径方向に
対して傾斜した状態で形成された。In the electrode terminal 5 of the sixth embodiment, the shaft portion 51 and the bridging portion 52 are formed on the end faces of the protruding ends 23 and 33, and the side end portion 53 and the bridging portion 52 of the shaft portion 51 are arranged in the longitudinal direction. It was formed in an inclined state.

【０１０４】実施例６の電池の扁平形状巻回型電極体１
と電極端子５の接合は、実施例５と同様の手段により行
われた。ここで、図１６に正極端子５５を突出端部２３
に配置した状態の図を示した。Flat wound electrode body 1 of battery of Example 6
Bonding of the electrode terminal 5 was performed by the same means as in the fifth embodiment. Here, the positive terminal 55 is connected to the protruding end portion 23 in FIG.
FIG.

【０１０５】実施例６の電池は、突出端部２３、３３が
複数層の厚密化部２４、３４を有することで突出端部の
長さを短くすることができる。また、架橋部５２が傾斜
して形成されることでも、突出端部２３、３３の長さを
短縮することができる。In the battery of the sixth embodiment, the length of the protruding ends can be shortened because the protruding ends 23 and 33 have the thickened portions 24 and 34 of a plurality of layers. In addition, the length of the protruding ends 23 and 33 can be shortened even when the bridge portion 52 is formed to be inclined.

【０１０６】（実施例７）実施例７は、図１７に示され
たように、一方の長辺部に厚密化部２４、３４が形成さ
れた扁平型状巻回型電極体１と、厚密化部２４が形成さ
れた長辺部の外周面に軸部５１が配置され径方向に架橋
部５２が形成された電極端子５と、を有する以外は、実
施例１と同様な構成の電池である。Embodiment 7 As shown in FIG. 17, the embodiment 7 is a flat wound electrode body 1 having thickened portions 24 and 34 formed on one long side thereof. The configuration is the same as that of the first embodiment except that the shaft terminal 51 is disposed on the outer peripheral surface of the long side where the thickened portion 24 is formed, and the electrode terminal 5 is formed with the bridge portion 52 formed in the radial direction. Battery.

【０１０７】扁平形状巻回型電極体１は、突出端部２
３、３３の長辺部の一方のみを径方向に圧縮して厚密化
部２４、３４が形成された。The flat wound electrode body 1 has a protruding end 2
Only one of the long sides of 3, 33 was radially compressed to form thickened portions 24, 34.

【０１０８】電極端子５は、突出端部２３、３３の厚密
化部２４、３４が形成された一方の長辺部の外周面に沿
って配される軸部５１と、軸部５１から突出端部２３、
３３の突出した方向に沿って突出した突起よりなるとと
もに突出端部２３、３３と接合されて架橋部５２を形成
する突起部５４と、を有する。The electrode terminal 5 has a shaft portion 51 disposed along the outer peripheral surface of one long side where the thickened portions 24 and 34 of the protruding ends 23 and 33 are formed, and a protruding portion from the shaft portion 51. End 23,
And a projection 54 formed of a projection protruding along the direction in which the projection 33 protrudes and joined to the protruding ends 23 and 33 to form a bridge 52.

【０１０９】実施例７の扁平型状巻回型電極体１と電極
端子５の接合は、実施例１と同様の手段により行われ
た。ここで、図１８に正極端子５５を突出端部２３に配
置した状態の図を示した。The flat wound electrode body 1 and the electrode terminal 5 of the seventh embodiment were joined by the same means as in the first embodiment. Here, FIG. 18 shows a state in which the positive electrode terminal 55 is arranged on the protruding end 23.

【０１１０】実施例７の電池は、電極端子５と接合され
る厚密化部２４、３４を扁平形状巻回型電極体１の一対
の長辺部の一方に形成している。このため、長辺部の他
方は厚密化されておらず、電池を組み立てたときに、こ
の他方の長辺部側の電極板間への電解液の注入に余計な
手間がかからなくなり、電池に要するコストを低減する
ことができる。In the battery of Example 7, the thickened portions 24 and 34 to be joined to the electrode terminals 5 are formed on one of the pair of long sides of the flat wound electrode body 1. For this reason, the other of the long sides is not thickened, and when assembling the battery, no extra labor is required for injecting the electrolyte between the electrode plates on the other long side, The cost required for the battery can be reduced.

【０１１１】（実施例８）実施例８は、図１９に示され
たように、突出端部２３、３３が扁平形状巻回型電極体
１の厚さ方向に対して圧縮され一層の厚密化部２４が形
成され、かつ厚密化部２４と４カ所で一体に接合された
架橋部５２が形成された電極端子５を有する以外は実施
例１と同様な構成の電池である。(Embodiment 8) In Embodiment 8, as shown in FIG. 19, the protruding end portions 23 and 33 are compressed in the thickness direction of the flat-shaped wound electrode body 1 so that This is a battery having the same configuration as that of the first embodiment except that an electrode terminal 5 is formed in which a roughened portion 24 is formed and a bridging portion 52 integrally joined to the thickened portion 24 at four places is formed.

【０１１２】実施例８の扁平形状巻回型電極体１は、突
出端部２３、３３が扁平形状巻回型電極体１の厚さ方向
に重ね合わされ、一体の厚密化部２４、３４が形成され
ている。すなわち、突出端部２３、３３が、扁平巻回形
状において、一対の長辺部が互いに最内周面の未塗布部
２２、３２が当接した状態に形成されている。また、突
出端部２３、３３の最内周面側の未塗布部２２、３２が
重ね合わされた状態で厚密化されたため、軸心部の中空
部は形成されなかった。In the flat wound electrode body 1 of the eighth embodiment, the protruding ends 23 and 33 are overlapped in the thickness direction of the flat wound electrode body 1, and the integral thickened portions 24 and 34 are formed. Is formed. That is, the protruding end portions 23 and 33 are formed in a flat wound shape such that a pair of long side portions are in contact with the uncoated portions 22 and 32 on the innermost peripheral surface. In addition, since the uncoated portions 22 and 32 on the innermost peripheral surface side of the protruding ends 23 and 33 were densified in a state of being overlapped, a hollow portion at the axial center was not formed.

【０１１３】実施例８の電極端子５は、突出端部２３、
３３の長辺部の外周面に沿って配された軸部５１と、突
出端部２３、３３の未塗布部２２、３２が厚密化された
厚密化部２４、３４を厚さ方向に横断した状態に突出し
た４個の突起５４がそれぞれ溶融し突出端部２３、３３
の未塗布部２４、３４と一体に形成された４カ所の架橋
部５２と、を有する部材である。The electrode terminal 5 of the eighth embodiment has a protruding end 23,
The shaft portion 51 disposed along the outer peripheral surface of the long side of the 33 and the thickened portions 24 and 34 in which the uncoated portions 22 and 32 of the protruding ends 23 and 33 are thickened in the thickness direction. The four projections 54 protruding in a crossed state are respectively melted and protruded end portions 23, 33.
And the four bridge portions 52 integrally formed with the uncoated portions 24 and 34 of FIG.

【０１１４】実施例８の扁平形状巻回型電極体１と電極
端子５の接合は、実施例１と同様の手段により行われ
た。ここで、図２０に電極端子５を突出端部２３に配置
した状態の図を示した。The flat wound electrode body 1 and the electrode terminal 5 of the eighth embodiment were joined by the same means as in the first embodiment. Here, FIG. 20 shows a state in which the electrode terminals 5 are arranged at the protruding end portions 23.

【０１１５】実施例８の電池は、扁平形状巻回型電極体
１の厚さ方向に突出端部２３、３３が１層に厚密化され
た厚密化部２４を有し、電極端子５と接合されているた
め、電極端子５との接合を強固に行うことができる。The battery of Example 8 has a thickened portion 24 in which the protruding end portions 23 and 33 are formed in a single layer in the thickness direction of the flat wound electrode body 1. Therefore, the bonding with the electrode terminal 5 can be performed firmly.

【０１１６】（実施例９）実施例９は、図２１に示され
たように、軸部５１に貫通孔５１５を形成した電極端子
５を用いた以外は実施例１と同様な構成の電池である。Example 9 Example 9 is a battery having the same structure as that of Example 1 except that the electrode terminal 5 having the through-hole 515 formed in the shaft portion 51 was used as shown in FIG. is there.

【０１１７】実施例９の扁平形状巻回型電極体１と電極
端子５の接合は、実施例１と同様の手段により行われ
た。ここで、図２２に正極端子５５を突出端部２３に配
置した状態の図を示した。The flat wound electrode body 1 and the electrode terminal 5 of the ninth embodiment were joined by the same means as in the first embodiment. Here, FIG. 22 shows a state in which the positive electrode terminal 55 is arranged on the protruding end 23.

【０１１８】実施例９の電池は、電極端子５の軸部５１
に貫通孔５１５が形成されているため、電池を組み立て
るときに、電解液の注入に余計な手間がかからなくな
り、電池の製造に要するコストを低減することができ
る。すなわち、電極端子５が接合された扁平形状巻回型
電極体１をケース内に電解液とともに封入するときに、
電解液が貫通孔５１５を通って積層した電極板２、３間
に注入される。また、電極端子５の軸部５１に貫通孔５
１５を形成することで、電極端子５の重量を軽量化する
ことができる。The battery of the ninth embodiment has a structure in which the shaft 51
Since the through holes 515 are formed in the battery, no extra time is required for injecting the electrolyte when assembling the battery, and the cost required for manufacturing the battery can be reduced. That is, when the flat wound electrode body 1 to which the electrode terminals 5 are joined is sealed in the case together with the electrolyte,
The electrolyte is injected between the stacked electrode plates 2 and 3 through the through holes 515. Also, a through hole 5 is formed in the shaft portion 51 of the electrode terminal 5.
By forming 15, the weight of the electrode terminal 5 can be reduced.

【０１１９】（実施例１０）実施例１０は、図２３に示
されたように、連続的に架橋部５２１が形成された電極
端子５を有する以外は実施例８と同様な構成の電池であ
る。(Embodiment 10) Embodiment 10 is a battery having the same configuration as that of Embodiment 8 except that it has an electrode terminal 5 having a continuous bridging portion 521 as shown in FIG. .

【０１２０】実施例１０の扁平形状巻回型電極体１に
は、突出端部２３、３３の未塗布部２２、３２が扁平形
状巻回型電極体１の厚さ方向に重ね合わされ、一層の厚
密化部２４、３４が形成されている。また、突出端部２
３、３３を構成する未塗布部２２、３２においては、巻
回型電極体の最内周面側の未塗布部２２、３２が当接し
た状態で厚密化されている。このため、突出端部２３、
３３の軸心部に中空部は形成されなかった。In the flat wound electrode body 1 of the tenth embodiment, the uncoated portions 22 and 32 of the protruding ends 23 and 33 are overlapped in the thickness direction of the flat wound electrode body 1 to form one layer. Thickened portions 24 and 34 are formed. Also, the protruding end 2
In the uncoated portions 22 and 32 constituting the portions 3 and 33, the uncoated portions 22 and 32 on the innermost peripheral surface side of the spirally wound electrode body are thickened in a state of contact. For this reason, the projecting end 23,
No hollow portion was formed at the shaft center of No. 33.

【０１２１】実施例１０の電極端子５は、突出端部２
３、３３の長辺部の外周面に沿って配された軸部５１
と、軸部５１から厚密化された厚密化部２４、３４の端
面を覆う状態で形成された長径方向の帯状の突起５４１
が溶融し突出端部２３、３３と一体に形成された架橋部
５２１と、を有する。In the tenth embodiment, the electrode terminal 5 is
Shaft portions 51 arranged along the outer peripheral surface of the long side portion of 3, 33
And a long-diameter band-like projection 541 formed so as to cover the end surfaces of the thickened portions 24 and 34 thickened from the shaft portion 51.
And a bridging portion 521 integrally formed with the protruding end portions 23 and 33 by melting.

【０１２２】実施例１０の扁平型状巻回型電極体１と電
極端子５の接合は、実施例８と同様の手段により行われ
た。ここで、図２３に正極端子５５を突出端部２３に配
置した状態の図を示した。The flat wound electrode body 1 of Example 10 and the electrode terminal 5 were joined by the same means as in Example 8. Here, FIG. 23 shows a state in which the positive electrode terminal 55 is arranged on the protruding end 23.

【０１２３】実施例１０の電池は、電極端子５と突出端
部２３、３３とが接合された架橋部５２１を連続的に形
成しているため、電極端子５と突出端部２３、３３との
接合面積が広くなっている。この結果、電極端子５と突
出端部２３、３３との接合強度が高くなっている。In the battery of Example 10, since the bridge portion 521 in which the electrode terminal 5 and the protruding ends 23 and 33 are joined is continuously formed, the connection between the electrode terminal 5 and the protruding ends 23 and 33 is made. The bonding area is wide. As a result, the bonding strength between the electrode terminal 5 and the protruding ends 23 and 33 is increased.

【０１２４】[0124]

【発明の効果】本発明の電池は、電極体の突出端部の端
面に電極端子を接合しているため、各突出端部に電極端
子が外周面および内周面に接合されるための接合しろを
もうける必要がなくなり、突出端部の長さを短縮でき
る。このため、電極体の軸方向の長さを短縮できる。こ
の結果、この電極体および電極端子が用いられた電池
は、その体格を小型化できる効果を示す。According to the battery of the present invention, the electrode terminals are joined to the end surfaces of the protruding ends of the electrode body, so that the electrode terminals are joined to the outer peripheral surface and the inner peripheral surface of each protruding end. There is no need to make a margin, and the length of the protruding end can be reduced. For this reason, the axial length of the electrode body can be reduced. As a result, a battery using the electrode body and the electrode terminal has an effect of reducing the size.

【図面の簡単な説明】[Brief description of the drawings]

【図１】 実施例１の電池の電極体と電極端子を示した
図である。FIG. 1 is a view showing an electrode body and an electrode terminal of a battery of Example 1.

【図２】 実施例１の電池の電極体を構成する正極板、
負極板およびセパレータが積層した状態を示した図であ
る。FIG. 2 shows a positive electrode plate constituting an electrode body of the battery of Example 1,
FIG. 3 is a diagram illustrating a state in which a negative electrode plate and a separator are stacked.

【図３】 実施例１の電池の電極体に電極端子を挿入す
る様子を示した図である。FIG. 3 is a view showing a state in which electrode terminals are inserted into the electrode body of the battery of Example 1.

【図４】 実施例１の電池の電極体に電極端子の軸部を
挿入した状態を示した図である。FIG. 4 is a diagram showing a state in which a shaft of an electrode terminal is inserted into the electrode body of the battery of Example 1.

【図５】 実施例１の電池の電極体に電極端子を固定す
る様子を示した図である。FIG. 5 is a view showing a state in which electrode terminals are fixed to the electrode body of the battery of Example 1.

【図６】 突起部が溶融し架橋部を形成する様子を示し
た図である。FIG. 6 is a view showing a state in which a protruding portion is melted to form a crosslinked portion.

【図７】 実施例２の電池の電極体と電極端子を示した
図である。FIG. 7 is a view showing an electrode body and an electrode terminal of the battery of Example 2.

【図８】 実施例２の電池の電極体に電極端子の軸部を
挿入した状態を示した図である。FIG. 8 is a view showing a state where a shaft portion of an electrode terminal is inserted into an electrode body of the battery of Example 2.

【図９】 実施例３の電池の電極体と電極端子を示した
図である。FIG. 9 is a view showing an electrode body and an electrode terminal of the battery of Example 3.

【図１０】 実施例３の電池の電極体に電極端子の軸部
を挿入した状態を示した図である。FIG. 10 is a view showing a state where a shaft portion of an electrode terminal is inserted into an electrode body of the battery of Example 3.

【図１１】 実施例４の電池の電極体と電極端子を示し
た図である。FIG. 11 is a view showing an electrode body and an electrode terminal of the battery of Example 4.

【図１２】 実施例４の電池の電極体に電極端子の軸部
を挿入した状態を示した図である。FIG. 12 is a view showing a state where a shaft portion of an electrode terminal is inserted into an electrode body of the battery of Example 4.

【図１３】 実施例５の電池の電極体と電極端子を示し
た図である。FIG. 13 is a view showing an electrode body and electrode terminals of the battery of Example 5.

【図１４】 実施例５の電池の電極体に電極端子の軸部
を挿入した状態を示した図である。FIG. 14 is a view showing a state where a shaft portion of an electrode terminal is inserted into an electrode body of the battery of Example 5.

【図１５】 実施例６の電池の電極体と電極端子を示し
た図である。FIG. 15 is a view showing an electrode body and electrode terminals of the battery of Example 6.

【図１６】 実施例６の電池の電極体に電極端子の軸部
を挿入した状態を示した図である。FIG. 16 is a diagram showing a state in which a shaft of an electrode terminal is inserted into an electrode body of the battery of Example 6.

【図１７】 実施例７の電池の電極体と電極端子を示し
た図である。FIG. 17 is a view showing an electrode body and electrode terminals of the battery of Example 7.

【図１８】 実施例７の電池の電極体に電極端子の軸部
を挿入した状態を示した図である。FIG. 18 is a view showing a state where a shaft portion of an electrode terminal is inserted into the electrode body of the battery of Example 7.

【図１９】 実施例８の電池の電極体と電極端子を示し
た図である。FIG. 19 is a diagram showing an electrode body and electrode terminals of a battery according to an eighth embodiment.

【図２０】 実施例８の電池の電極体に電極端子の軸部
を挿入した状態を示した図である。FIG. 20 is a view showing a state where a shaft portion of an electrode terminal is inserted into the electrode body of the battery of Example 8.

【図２１】 実施例９の電池の電極体と電極端子を示し
た図である。FIG. 21 is a diagram showing an electrode body and electrode terminals of a battery of Example 9.

【図２２】 実施例９の電池の電極体に電極端子の軸部
を挿入した状態を示した図である。FIG. 22 is a view showing a state where a shaft portion of an electrode terminal is inserted into the electrode body of the battery of Example 9;

【図２３】 実施例１０の電池の電極体と電極端子を示
した図である。FIG. 23 is a diagram showing an electrode body and electrode terminals of the battery of Example 10.

【図２４】 実施例１０の電池の電極体に電極端子の軸
部を挿入した状態を示した図である。FIG. 24 is a diagram showing a state where a shaft portion of an electrode terminal is inserted into the electrode body of the battery of Example 10.

【図２５】 従来の扁平形状巻回型電極体に電極端子を
接合した正面図である。FIG. 25 is a front view in which electrode terminals are joined to a conventional flat wound electrode body.

【図２６】 従来の扁平形状巻回型電極体に電極端子を
接合した側面図である。FIG. 26 is a side view in which an electrode terminal is joined to a conventional flat wound electrode body.

【符号の説明】[Explanation of symbols]

１…扁平形状巻回型電極体 ２…正極板 ３
…負極板 ４…セパレータ ５…電極端子 ２１、３１…活物質層 ２２、３２…未塗布部 ２３、３３…突出端部 ２４、３４…厚密化部 ５１…軸部 ５２…架橋部 ５３…側
端部 ５４…突起部 ５５…正極端子 ５６…負
極端子DESCRIPTION OF SYMBOLS 1 ... Flat wound electrode body 2 ... Positive electrode plate 3
... negative electrode plate 4 ... separator 5 ... electrode terminal 21, 31 ... active material layer 22, 32 ... uncoated portion 23, 33 ... protruding end portion 24, 34 ... thickening portion 51 ... shaft portion 52 ... bridge portion 53 ... side End 54 ... Protrusion 55 ... Positive terminal 56 ... Negative terminal

───────────────────────────────────────────────────── フロントページの続き (72)発明者 竹内 幸久 愛知県刈谷市昭和町１丁目１番地 株式会 社デンソー内 (72)発明者 角谷 賀彦 愛知県刈谷市昭和町１丁目１番地 株式会 社デンソー内 (72)発明者 原田 徹 愛知県刈谷市昭和町１丁目１番地 株式会 社デンソー内 (72)発明者 竹内 友康 愛知県刈谷市昭和町１丁目１番地 株式会 社デンソー内 Ｆターム(参考） 5H022 AA18 BB14 CC08 CC11 CC16 5H028 AA05 CC05 CC08 CC12 CC21 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Yukihisa Takeuchi 1-1-1, Showa-cho, Kariya-shi, Aichi Prefecture Inside Denso Corporation (72) Inventor Yoshihiko Kadoya 1-1-1, Showa-cho, Kariya-shi, Aichi Prefecture Denso Corporation (72) Inventor Tohru Harada 1-1-1, Showa-cho, Kariya-shi, Aichi, Japan Denso Co., Ltd. (72) Inventor Tomoyasu 1-1-1, Showa-cho, Kariya-shi, Aichi F-term, Denso Corporation (reference) 5H022 AA18 BB14 CC08 CC11 CC16 5H028 AA05 CC05 CC08 CC12 CC21

Claims (32)

【特許請求の範囲】[Claims] 【請求項１】 集電体と、該集電体の両面に塗布された
電極活物質と、からなり、該電極活物質が塗布された電
極部と、該集電体の幅方向の一方の端部側に形成され該
集電体の表面が露出した未塗布部と、を有する帯状の正
極板および負極板と、 帯状のセパレータと、 からなり、該正極板および該負極板が各該未塗布部が互
いに反対方向に突出しかつ該電極部が該セパレータを介
した状態で配置され各該未塗布部よりなる突出端部を有
する電極体と、 該電極体の該突出端部の端部に架橋部を介して接合され
た電極端子と、を有することを特徴とする電池。1. An electrode part comprising a current collector, and an electrode active material applied to both surfaces of the current collector, and one of the width direction of the current collector and one of the electrodes in the width direction of the current collector. A strip-shaped positive electrode plate and a negative electrode plate each having an uncoated portion formed on an end portion and exposing the surface of the current collector; and a strip-shaped separator. An electrode body having application parts protruding in opposite directions and the electrode part being disposed with the separator interposed therebetween, the electrode body having a protruding end composed of each of the uncoated parts; and an end of the protruding end of the electrode body. A battery comprising: an electrode terminal joined via a bridge portion. 【請求項２】 前記架橋部は、前記正極板の隣り合う間
および前記負極板の隣り合う間の間隙内に入り込んで該
正極板の隣り合う間および該負極板の隣り合う間をそれ
ぞれ接合している請求項１記載の電池。2. The bridging portion is inserted into a gap between the adjacent positive electrode plates and a gap between the adjacent negative electrode plates, and joins between the adjacent positive electrode plates and between the adjacent negative electrode plates. The battery according to claim 1, wherein 【請求項３】 前記架橋部は、複数存在している請求項
１、２記載の電池。3. The battery according to claim 1, wherein a plurality of the bridging portions exist. 【請求項４】 前記正極板、前記負極板および前記セパ
レータは帯状の形状を有し、該正極板および該負極板が
該セパレータを介して巻回された扁平形状巻回型構成を
有している請求項１〜３記載の電池。4. The positive electrode plate, the negative electrode plate, and the separator have a band-like shape, and have a flat winding type configuration in which the positive electrode plate and the negative electrode plate are wound with the separator interposed therebetween. The battery according to claim 1. 【請求項５】 前記電極端子に接合された前記突出端部
は、厚さ方向に重ね合わされて厚密化部となっている請
求項１記載の電池。5. The battery according to claim 1, wherein the protruding end portions joined to the electrode terminals are overlapped in a thickness direction to form a thickened portion. 【請求項６】 前記突出端部は、複数箇所の前記厚密化
部を有する請求項５記載の電池。6. The battery according to claim 5, wherein the protruding end has a plurality of thickened portions. 【請求項７】 前記厚密化部は、前記突出端部の厚さ方
向に対して傾斜した方向に形成された請求項５記載の電
池。7. The battery according to claim 5, wherein the thickened portion is formed in a direction inclined with respect to a thickness direction of the protruding end. 【請求項８】 前記厚密化部が長辺部にある請求項４、
５記載の電池。8. The method according to claim 4, wherein the thickening portion is on a long side portion.
5. The battery according to 5. 【請求項９】 対向した一対の前記長辺部に厚密化部が
形成される請求項８記載の電池。9. The battery according to claim 8, wherein a thickened portion is formed at the pair of long sides facing each other. 【請求項１０】 前記長辺部に形成された前記厚密化部
は、長径方向に対して傾斜した方向に形成された請求項
８、９記載の電池。10. The battery according to claim 8, wherein the thickened portion formed on the long side portion is formed in a direction inclined with respect to the major diameter direction. 【請求項１１】 前記電極端子は、軸部と、該軸部と一
体に形成され前記突出端部に接合された突起部と、を有
する請求項１〜１０記載の電池。11. The battery according to claim 1, wherein the electrode terminal has a shaft, and a projection formed integrally with the shaft and joined to the protruding end. 【請求項１２】 前記突起部は、複数個形成されてお
り、それぞれの該突起部が前記突出端部に接合されてい
る請求項１１記載の電池。12. The battery according to claim 11, wherein a plurality of the protrusions are formed, and each of the protrusions is joined to the protrusion end. 【請求項１３】 前記軸部は、複数箇所の前記厚密化部
のそれぞれに対向した状態で配置される請求項１１記載
の電池。13. The battery according to claim 11, wherein the shaft portion is disposed so as to face each of the plurality of thickened portions. 【請求項１４】 前記軸部は、一対の前記長辺部のそれ
ぞれに対向した状態で前記突出端部に配置される請求項
１１、１２記載の電池。14. The battery according to claim 11, wherein the shaft portion is arranged on the protruding end portion in a state of facing each of the pair of long side portions. 【請求項１５】 前記軸部は、前記突出端部の外周面に
対向した状態で配置される請求項１１記載の電池。15. The battery according to claim 11, wherein the shaft is disposed so as to face an outer peripheral surface of the protruding end. 【請求項１６】 前記軸部は、前記突出端部の端面に配
置される請求項１１記載の電池。16. The battery according to claim 11, wherein the shaft is disposed on an end face of the protruding end. 【請求項１７】 前記軸部は、前記電極体の前記突出端
部の突出した方向に貫通した貫通孔を有する請求項１１
記載の扁平型状巻回型電極電池。17. The shaft portion has a through hole penetrating in a direction in which the protruding end portion of the electrode body protrudes.
The flat-shaped wound electrode battery according to the above. 【請求項１８】 集電体と、該集電体の両面に塗布され
た電極活物質と、からなり、該電極活物質が塗布された
電極部と、該集電体の幅方向の一方の端部側に形成され
該集電体の表面が露出した未塗布部と、を有する帯状の
正極板および負極板と、帯状のセパレータと、からな
り、該正極板および該負極板が各該未塗布部が互いに反
対方向に突出しかつ該電極部が該セパレータを介した状
態で配置され各該未塗布部よりなる突出端部を有する電
極体と、 軸部と、該軸部と一体に形成され該突出端部と接合され
る突起部と、を有する電極端子と、 を、各該突出端部の端面に該電極端子を接合する電極端
子接合工程を有する電池の製造方法であって、 該電極端子接合工程が、 該電極体の該突出端部の端部に該電極端子を配置した状
態で、該突起部を溶融させ、該突起部の溶融液を該突出
端部の積層した該未塗布部に供給した後に該溶融液を固
化する工程であることを特徴とする電池の製造方法。18. An electrode part comprising a current collector and an electrode active material applied to both surfaces of the current collector, and an electrode portion to which the electrode active material is applied, and one of a width direction of the current collector A strip-shaped positive electrode plate and a negative electrode plate each having an uncoated portion formed on an end portion side and exposing the surface of the current collector, and a strip-shaped separator. An electrode body having application parts protruding in opposite directions and the electrode part being disposed with the separator interposed therebetween, having an electrode body having a protruding end part composed of each of the uncoated parts, a shaft part, and integrally formed with the shaft part; An electrode terminal having a protrusion joined to the protruding end; and an electrode terminal joining step of joining the electrode terminal to an end face of each of the protruding ends. In the terminal joining step, with the electrode terminal disposed at the end of the protruding end of the electrode body, the projection is formed. Method for producing a battery, characterized in that the melted, a solidifying the melt after providing protruding to the yet-coating portion stacked in the protruding end portion of the melt of raised portion. 【請求項１９】 前記突起部は、ＴＩＧ溶接機により溶
融される請求項１８記載の電池の製造方法。19. The method according to claim 18, wherein the protrusion is melted by a TIG welding machine. 【請求項２０】 前記電極端子は、複数の突起部を有す
る請求項１８記載の電池の製造方法。20. The method according to claim 18, wherein the electrode terminal has a plurality of protrusions. 【請求項２１】 前記電極体は、前記正極板、前記負極
板および前記セパレータは帯状の形状を有し、該正極板
および該負極板が該セパレータを介して巻回された扁平
形状巻回型構成を有している請求項１８記載の電池の製
造方法。21. The electrode body, wherein the positive electrode plate, the negative electrode plate, and the separator have a strip shape, and the positive electrode plate and the negative electrode plate are wound through the separator to form a flat wound type. The method for manufacturing a battery according to claim 18, having a configuration. 【請求項２２】 前記電極端子に接合された前記突出端
部は、少なくとも一部が厚さ方向に重ね合わされて厚密
化部となっている請求項１８記載の電池の製造方法。22. The method according to claim 18, wherein at least a part of the protruding end portion joined to the electrode terminal is overlapped in a thickness direction to form a thickened portion. 【請求項２３】 前記突出端部は、複数箇所の前記厚密
化部を有する請求項２２記載の電池の製造方法。23. The method according to claim 22, wherein the protruding end has a plurality of the thickened portions. 【請求項２４】 前記厚密化部は、前記突出端部の厚さ
方向に対して傾斜した方向に形成された請求項２２記載
の電池の製造方法。24. The method according to claim 22, wherein the thickened portion is formed in a direction inclined with respect to a thickness direction of the protruding end. 【請求項２５】 前記厚密化部が長辺部にある請求項２
１、２２記載の電池の製造方法。25. The thickened portion is on a long side portion.
23. The method for producing a battery according to any one of Items 1 and 22. 【請求項２６】 対向した一対の前記長辺部に厚密化部
が形成される請求項２５記載の電池の製造方法。26. The method for manufacturing a battery according to claim 25, wherein a thickened portion is formed on the pair of long sides facing each other. 【請求項２７】 前記長辺部に形成された前記厚密化部
は、長径方向に対して傾斜した方向に形成された請求項
２５記載の電池の製造方法。27. The method of manufacturing a battery according to claim 25, wherein the thickened portion formed on the long side portion is formed in a direction inclined with respect to a major diameter direction. 【請求項２８】 前記軸部は、複数箇所の前記厚密化部
のそれぞれに対向した状態で配置される請求項２３記載
の電池の製造方法。28. The method for manufacturing a battery according to claim 23, wherein the shaft portion is disposed so as to face each of the plurality of thickened portions. 【請求項２９】 前記軸部は、一対の前記長辺部のそれ
ぞれに対向した状態で前記突出端部に配置される請求項
２５記載の電池の製造方法。29. The method for manufacturing a battery according to claim 25, wherein the shaft portion is disposed on the protruding end portion in a state of facing the pair of long side portions. 【請求項３０】 前記軸部は、前記突出端部の外周面に
対向した状態で配置される請求項１８記載の電池の製造
方法。30. The method for manufacturing a battery according to claim 18, wherein the shaft portion is disposed so as to face an outer peripheral surface of the protruding end portion. 【請求項３１】 前記軸部は、前記突出端部の端面に配
置される請求項１８記載の電池の製造方法。31. The method according to claim 18, wherein the shaft is disposed on an end face of the protruding end. 【請求項３２】 前記軸部は、前記電極体の前記突出端
部の突出した方向に貫通した貫通孔を有する請求項１８
記載の電池の製造方法。32. The shaft part has a through hole penetrating in a direction in which the protruding end of the electrode body protrudes.
A method for producing the battery according to the above.
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