JP5578118B2 - Battery and battery manufacturing method - Google Patents

Battery and battery manufacturing method Download PDF

Info

Publication number
JP5578118B2
JP5578118B2 JP2011052525A JP2011052525A JP5578118B2 JP 5578118 B2 JP5578118 B2 JP 5578118B2 JP 2011052525 A JP2011052525 A JP 2011052525A JP 2011052525 A JP2011052525 A JP 2011052525A JP 5578118 B2 JP5578118 B2 JP 5578118B2
Authority
JP
Japan
Prior art keywords
positive electrode
power generation
generation element
terminal
metal foil
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.)
Active
Application number
JP2011052525A
Other languages
Japanese (ja)
Other versions
JP2012190636A (en
Inventor
久幸 山根
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.)
GS Yuasa International Ltd
Original Assignee
GS Yuasa International Ltd
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 GS Yuasa International Ltd filed Critical GS Yuasa International Ltd
Priority to JP2011052525A priority Critical patent/JP5578118B2/en
Publication of JP2012190636A publication Critical patent/JP2012190636A/en
Application granted granted Critical
Publication of JP5578118B2 publication Critical patent/JP5578118B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

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

Landscapes

  • Connection Of Batteries Or Terminals (AREA)
  • Secondary Cells (AREA)

Description

この発明は、電池および電池の製造方法に関し、特に、積層された金属箔を含む発電要素を備えた電池およびそのような電池の製造方法に関する。   The present invention relates to a battery and a method for manufacturing the battery, and more particularly, to a battery including a power generation element including laminated metal foils and a method for manufacturing such a battery.

従来、積層された金属箔を含む発電要素を備えた電池が知られている（たとえば、特許文献１参照）。   Conventionally, a battery including a power generation element including stacked metal foils is known (for example, see Patent Document 1).

上記特許文献１には、巻回されることにより積層された金属箔を含む発電要素と、発電要素の巻軸方向の端部において、発電要素の金属箔に接合される凹部を有する接合部分を含む集電端子とを備えた二次電池（電池）が開示されている。この集電端子は、発電要素の金属箔の端部が接合部分の凹部に挿入された状態で発電要素の金属箔に接合されている。   Patent Document 1 includes a power generation element including a metal foil laminated by being wound, and a joint portion having a recess to be joined to the metal foil of the power generation element at an end portion in the winding axis direction of the power generation element. A secondary battery (battery) including a current collecting terminal is disclosed. The current collecting terminal is joined to the metal foil of the power generation element in a state where the end of the metal foil of the power generation element is inserted into the concave portion of the joint portion.

特許第４３５５８６５号公報Japanese Patent No. 4355865

しかしながら、上記特許文献１の二次電池（電池）では、製造工程において、発電要素の金属箔の端部を接合部分の凹部に挿入する際に、発電要素の金属箔と集電端子の接合部分とが互いに擦れ合うことによって発電要素の金属箔が損傷を受けたり位置ずれしたりする場合がある。この場合には、発電要素の金属箔と集電端子とが適切に接合されない虞がある。   However, in the secondary battery (battery) of Patent Document 1, when the end of the metal foil of the power generation element is inserted into the recess of the joint part in the manufacturing process, the joint of the metal foil of the power generation element and the current collecting terminal is inserted. And the metal foil of the power generating element may be damaged or misaligned. In this case, there is a possibility that the metal foil of the power generation element and the current collecting terminal are not appropriately joined.

この発明は、上記のような課題を解決するためになされたものであり、この発明の１つの目的は、発電要素の金属箔と集電端子とを適切に接合可能な電池およびそのような電池の製造方法を提供することである。   The present invention has been made to solve the above-described problems, and one object of the present invention is a battery capable of appropriately joining a metal foil of a power generation element and a current collecting terminal, and such a battery. It is to provide a manufacturing method.

課題を解決するための手段および発明の効果Means for Solving the Problems and Effects of the Invention

この発明の第１の局面による電池は、積層された金属箔を含む発電要素と、発電要素の積層された金属箔に対して摺動してから接合される接合部分を含む集電端子と、集電端子の接合部分および発電要素の金属箔の少なくとも一方に設けられ、発電要素の積層された金属箔と集電端子の接合部分との間の摩擦抵抗を低減する摩擦低減材とを備えている。 A battery according to a first aspect of the present invention includes a power generation element including a laminated metal foil, a current collecting terminal including a joint portion that is joined after sliding against the laminated metal foil of the power generation element, A friction reducing material that is provided on at least one of the junction portion of the current collecting terminal and the metal foil of the power generation element, and reduces frictional resistance between the laminated metal foil of the power generation element and the joint portion of the current collection terminal. Yes.

この発明の第１の局面による電池では、上記のように、集電端子の接合部分および発電要素の金属箔の少なくとも一方に、発電要素の積層された金属箔と集電端子の接合部分との間の摩擦抵抗を低減する摩擦低減材を設けることによって、発電要素の積層された金属箔に対して集電端子の接合部分を接合位置まで相対的に移動させる際に、摩擦低減材により、発電要素の金属箔と集電端子の接合部分との間の摩擦抵抗が低減されるので、発電要素の金属箔と集電端子の接合部分とが相対移動時に直接接触して互いに擦れ合う場合と異なり、発電要素の金属箔が損傷を受けたり位置ずれしたりするのを抑制することができる。これにより、発電要素の金属箔と集電端子とを適切に接合することができる。   In the battery according to the first aspect of the present invention, as described above, at least one of the joined portion of the current collecting terminal and the metal foil of the power generating element, the metal foil laminated with the power generating element and the joined portion of the current collecting terminal By providing a friction-reducing material that reduces the frictional resistance between the power-generating elements, the friction-reducing material can be Because the frictional resistance between the metal foil of the element and the junction of the current collector terminal is reduced, unlike the case where the metal foil of the power generation element and the joint of the current collector terminal are in direct contact with each other and rub against each other, It is possible to suppress the metal foil of the power generation element from being damaged or displaced. Thereby, the metal foil of the power generation element and the current collecting terminal can be appropriately joined.

上記第１の局面による電池において、好ましくは、積層された金属箔の集電端子の接合部分に接合される部分は、略直線状に延びる直線状部であり、集電端子の接合部分は、積層された金属箔の直線状部に対応するように所定方向に略直線状に延びるように形成されており、摩擦低減材は、所定方向に延びるように集電端子の接合部分に設けられている。このように構成すれば、長円筒形電池や角形電池のように、積層された金属箔の集電端子に接合される部分および集電端子の接合部分が所定方向に直線状に延びている場合にも、集電端子の接合部分と同じ所定方向に延びるように設けられた摩擦低減材により、発電要素の金属箔と集電端子の接合部分との間の摩擦抵抗を効果的に低減することができる。これにより、長円筒形電池や角形電池において、発電要素の金属箔が損傷を受けたり位置ずれしたりするのを有効に抑制することができる。   In the battery according to the first aspect, preferably, the portion to be joined to the joined portion of the current collector terminal of the laminated metal foil is a linear portion extending substantially linearly, and the joined portion of the current collector terminal is: It is formed so as to extend substantially linearly in a predetermined direction so as to correspond to the linear part of the laminated metal foil, and the friction reducing material is provided at the junction portion of the current collecting terminal so as to extend in the predetermined direction. Yes. When configured in this way, a portion joined to the current collector terminal of the laminated metal foil and a joint portion of the current collector terminal extend linearly in a predetermined direction, such as a long cylindrical battery or a square battery In addition, the friction resistance between the metal foil of the power generation element and the joint portion of the current collector terminal is effectively reduced by the friction reducing material provided to extend in the same predetermined direction as the joint portion of the current collector terminal. Can do. Thereby, in a long cylindrical battery and a square battery, it can suppress effectively that the metal foil of an electric power generation element receives damage or shifts | deviates.

上記第１の局面による電池において、好ましくは、摩擦低減材は、発電要素の金属箔に対する摩擦係数が集電端子の接合部分よりも小さい摩擦係数を有する樹脂が貼付または塗布されることにより設けられている。このように構成すれば、摩擦低減材を、簡便な形成プロセスである樹脂の貼付または塗布により設けることができるので、集電端子の接合部分および発電要素の金属箔の少なくとも一方に摩擦低減材を容易に設けることができる。   In the battery according to the first aspect, preferably, the friction reducing material is provided by pasting or applying a resin having a coefficient of friction with respect to the metal foil of the power generation element smaller than that of the joined portion of the current collecting terminal. ing. If comprised in this way, since a friction reduction material can be provided by sticking or application | coating of resin which is a simple formation process, a friction reduction material is applied to at least one of the junction part of a current collection terminal, and the metal foil of an electric power generation element. It can be easily provided.

この発明の第２の局面による電池の製造方法は、金属箔を積層することにより形成された発電要素の金属箔と集電端子の発電要素の金属箔に接合される接合部分との間に、発電要素の金属箔と集電端子の接合部分との間の摩擦抵抗を低減する摩擦低減材が介在された状態で、積層された金属箔に対して集電端子の接合部分を相対的に接合位置まで移動した後、集電端子の接合部分と発電要素の金属箔とを接合する。   According to a second aspect of the present invention, there is provided a battery manufacturing method between a metal foil of a power generation element formed by laminating metal foils and a joint portion bonded to the metal foil of a power generation element of a current collecting terminal. Relatively join the current collector terminal joint to the laminated metal foil with a friction reducing material interposed between the metal foil of the power generation element and the current collector terminal. After moving to the position, the joined portion of the current collecting terminal and the metal foil of the power generation element are joined.

この発明の第２の局面による電池の製造方法では、上記のように、集電端子の接合部分と発電要素の金属箔との間に摩擦低減材が介在された状態で、積層された前記金属箔または前記集電端子の接合部分を摺動させて接合位置まで移動した後、集電端子の接合部分と発電要素の金属箔とを接合することによって、発電要素の積層された金属箔に対して集電端子の接合部分を相対的に接合位置まで移動する際に、摩擦低減材により、発電要素の金属箔と集電端子の接合部分との間の摩擦抵抗が低減されるので、発電要素の金属箔と集電端子の接合部分とが相対移動時に直接接触して互いに擦れ合う場合と異なり、発電要素の金属箔が損傷を受けたり位置ずれしたりするのを抑制することができる。これにより、発電要素の金属箔と集電端子とを適切に接合することができる。
In the battery manufacturing method according to the second aspect of the present invention, as described above, the metal laminated in a state where the friction reducing material is interposed between the joint portion of the current collecting terminal and the metal foil of the power generation element. After sliding the foil or the joined portion of the current collecting terminal to the joining position, the joined portion of the current collecting terminal and the metal foil of the power generating element are joined to the laminated metal foil of the power generating element. The friction reducing material reduces the frictional resistance between the metal foil of the power generation element and the joint portion of the current collector terminal when the joint portion of the current collector terminal is moved relatively to the joint position. Unlike the case where the metal foil and the joint portion of the current collecting terminal are in direct contact and rub against each other during relative movement, the metal foil of the power generation element can be prevented from being damaged or displaced. Thereby, the metal foil of the power generation element and the current collecting terminal can be appropriately joined.

本発明の第１実施形態による電池の全体構成を示した斜視図である。It is the perspective view which showed the whole structure of the battery by 1st Embodiment of this invention. 本発明の第１実施形態による電池の内部の構成を示した分解斜視図である。1 is an exploded perspective view illustrating an internal configuration of a battery according to a first embodiment of the present invention. 本発明の第１実施形態による電池の発電要素の構成を示した斜視図である。It is the perspective view which showed the structure of the electric power generation element of the battery by 1st Embodiment of this invention. 本発明の第１実施形態による電池の発電要素の金属箔と正極集電端子との接合部分を説明するための斜視図である。It is a perspective view for demonstrating the junction part of the metal foil and positive electrode current collection terminal of the electric power generation element of the battery by 1st Embodiment of this invention. 本発明の第１実施形態による電池の発電要素の金属箔が正極集電端子の凹部に挿入される際の状態を示した概略断面図である。It is the schematic sectional drawing which showed the state at the time of the metal foil of the electric power generation element of the battery by 1st Embodiment of this invention being inserted in the recessed part of a positive electrode current collection terminal. 本発明の第１実施形態による電池の発電要素の金属箔が正極集電端子に対する接合位置まで移動された状態を示した概略断面図である。It is the schematic sectional drawing which showed the state by which the metal foil of the electric power generation element of the battery by 1st Embodiment of this invention was moved to the joining position with respect to a positive electrode current collection terminal. 本発明の第１実施形態による電池の発電要素の金属箔と正極集電端子とがかしめにより接合された状態を示した概略断面図である。It is the schematic sectional drawing which showed the state by which the metal foil and positive electrode current collecting terminal of the electric power generation element of the battery by 1st Embodiment of this invention were joined by crimping. 本発明の第１実施形態による電池の発電要素の金属箔と正極集電端子とが超音波溶接により接合された状態を示した概略断面図である。It is the schematic sectional drawing which showed the state by which the metal foil and positive electrode current collection terminal of the electric power generation element of the battery by 1st Embodiment of this invention were joined by ultrasonic welding. 本発明の第２実施形態による電池の全体構成を示した分解斜視図である。It is the disassembled perspective view which showed the whole structure of the battery by 2nd Embodiment of this invention. 本発明の第２実施形態による電池の内部の構成を示した分解斜視図である。It is the disassembled perspective view which showed the internal structure of the battery by 2nd Embodiment of this invention. 本発明の第２実施形態による電池の発電要素の金属箔と正極集電端子との接合部分を説明するための斜視図である。It is a perspective view for demonstrating the junction part of the metal foil and positive electrode current collection terminal of the electric power generation element of the battery by 2nd Embodiment of this invention. 本発明の第２実施形態による電池の発電要素の金属箔が正極集電端子の隣接する２本の接続板部の間に挿入される際の状態を示した概略断面図である。It is the schematic sectional drawing which showed the state at the time of inserting the metal foil of the electric power generation element of the battery by 2nd Embodiment of this invention between the two connection board parts which a positive electrode current collection terminal adjoins. 本発明の第２実施形態による電池の発電要素の金属箔が正極集電端子に対する接合位置まで移動された状態を示した概略断面図である。It is the schematic sectional drawing which showed the state by which the metal foil of the electric power generation element of the battery by 2nd Embodiment of this invention was moved to the joining position with respect to a positive electrode current collection terminal. 本発明の第２実施形態による電池の発電要素の金属箔と正極集電端子の接続板部とが挟持板により挟持された状態を示した概略断面図である。It is the schematic sectional drawing which showed the state by which the metal foil of the power generation element of the battery by 2nd Embodiment of this invention and the connection board part of the positive electrode current collection terminal were clamped by the clamping board. 本発明の第２実施形態による電池の発電要素の金属箔と正極集電端子の接続板部とが超音波溶接により接合された状態を示した概略断面図である。It is the schematic sectional drawing which showed the state by which the metal foil of the power generation element of the battery by 2nd Embodiment of this invention and the connection board part of the positive electrode current collection terminal were joined by ultrasonic welding.

以下、本発明を具体化した実施形態を図面に基づいて説明する。   DESCRIPTION OF EXEMPLARY EMBODIMENTS Embodiments of the invention will be described below with reference to the drawings.

（第１実施形態）
まず、図１〜図４を参照して、本発明の第１実施形態による電池１００の構成について説明する。 (First embodiment)
First, with reference to FIGS. 1-4, the structure of the battery 100 by 1st Embodiment of this invention is demonstrated.

本発明の第１実施形態による電池１００は、図１に示すように、非水系電解質電池の一種である長円筒形状を有するリチウムイオン電池である。また、電池１００は、図２および図３に示すように、電池ケース１（図１参照）の内部に収納された金属箔を含む発電要素２を備えている。また、電池１００には、図１に示すように、電池ケース１の蓋部１１から上方に突出するように正極端子３および負極端子４が設けられている。また、電池１００は、図２に示すように、正極端子３を発電要素２に電気的に接続する正極集電端子５と、負極端子４を発電要素２に電気的に接続する負極集電端子６とをさらに備えている。なお、正極集電端子５および負極集電端子６は、本発明の「集電端子」の一例である。   The battery 100 according to the first embodiment of the present invention is a lithium ion battery having a long cylindrical shape, which is a kind of non-aqueous electrolyte battery, as shown in FIG. Moreover, the battery 100 is provided with the electric power generation element 2 containing the metal foil accommodated in the inside of the battery case 1 (refer FIG. 1), as shown in FIG.2 and FIG.3. As shown in FIG. 1, the battery 100 is provided with a positive electrode terminal 3 and a negative electrode terminal 4 so as to protrude upward from the lid portion 11 of the battery case 1. In addition, as shown in FIG. 2, the battery 100 includes a positive current collecting terminal 5 that electrically connects the positive electrode terminal 3 to the power generating element 2 and a negative current collecting terminal that electrically connects the negative electrode terminal 4 to the power generating element 2. 6 is further provided. The positive current collector terminal 5 and the negative current collector terminal 6 are examples of the “current collector terminal” in the present invention.

発電要素２は、図３に示すように、金属箔（アルミニウム箔）を含む帯状の正極２１と、金属箔（銅箔）を含む帯状の負極２２と、帯状のセパレータ２３とにより主として構成されている。具体的には、アルミニウム箔を含む正極２１と銅箔を含む負極２２とは、セパレータ２３を介して長円筒形状に巻回されている。   As shown in FIG. 3, the power generation element 2 is mainly configured by a strip-shaped positive electrode 21 including a metal foil (aluminum foil), a strip-shaped negative electrode 22 including a metal foil (copper foil), and a strip-shaped separator 23. Yes. Specifically, the positive electrode 21 including an aluminum foil and the negative electrode 22 including a copper foil are wound in a long cylindrical shape via a separator 23.

帯状の正極２１の下端部（Ｚ２方向側の端部）以外の部分には、正極の活物質やバインダ等からなる合剤２１ａが塗布されている。また、正極２１の下端部（Ｚ２方向側の端部）には、合剤２１ａが塗布されていない未塗工部２１ｂが形成されている。この未塗工部２１ｂは、帯状の正極２１の長手方向に沿って延びるように形成されている。また、未塗工部２１ｂでは、アルミニウム箔が露出している。また、正極２１の未塗工部２１ｂは、負極２２およびセパレータ２３の下端部よりも下方（Ｚ２方向）に突出するように配置されている。   A mixture 21 a made of a positive electrode active material, a binder, or the like is applied to a portion other than the lower end portion (end portion on the Z2 direction side) of the belt-like positive electrode 21. Moreover, the uncoated part 21b in which the mixture 21a is not apply | coated is formed in the lower end part (end part by the side of Z2 direction) of the positive electrode 21. FIG. The uncoated portion 21 b is formed so as to extend along the longitudinal direction of the belt-like positive electrode 21. In the uncoated portion 21b, the aluminum foil is exposed. Further, the uncoated portion 21 b of the positive electrode 21 is disposed so as to protrude downward (Z2 direction) from the lower end portions of the negative electrode 22 and the separator 23.

また、帯状の負極２２の上端部（Ｚ１方向側の端部）以外の部分には、負極の活物質やバインダ等からなる合剤２２ａが塗布されている。また、負極２２の上端部（Ｚ１方向側の端部）には、合剤２２ａが塗布されていない未塗工部２２ｂが形成されている。この未塗工部２２ｂは、帯状の負極２２の長手方向に沿って延びるように形成されている。また、未塗工部２２ｂでは、銅箔が露出している。また、負極２２の未塗工部２２ｂは、正極２１およびセパレータ２３の上端部よりも上方（Ｚ１方向）に突出するように配置されている。また、セパレータ２３は、多孔質の絶縁フィルムにより構成されている。すなわち、発電要素２の下端部には、積層された正極２１の未塗工部２１ｂ（アルミニウム箔が露出した部分）が突出しており、発電要素２の上端部には、積層された負極２２の未塗工部２２ｂ（銅箔が露出した部分）が突出している。   Further, a mixture 22 a made of a negative electrode active material, a binder, or the like is applied to a portion other than the upper end portion (end portion on the Z1 direction side) of the strip-shaped negative electrode 22. In addition, an uncoated portion 22b to which the mixture 22a is not applied is formed at the upper end portion (end portion on the Z1 direction side) of the negative electrode 22. The uncoated portion 22 b is formed so as to extend along the longitudinal direction of the strip-shaped negative electrode 22. Moreover, copper foil is exposed in the uncoated part 22b. Further, the uncoated portion 22 b of the negative electrode 22 is disposed so as to protrude upward (Z1 direction) from the upper ends of the positive electrode 21 and the separator 23. Moreover, the separator 23 is comprised with the porous insulating film. That is, an uncoated portion 21b (a portion where the aluminum foil is exposed) of the stacked positive electrode 21 protrudes from the lower end portion of the power generation element 2, and the stacked negative electrode 22 of the power generation element 2 protrudes from the upper end portion of the power generation element 2. The uncoated part 22b (part where the copper foil is exposed) protrudes.

正極集電端子５は、図２に示すように、アルミニウム合金板をプレス加工することにより形成されている。また、正極集電端子５は、正極２１の未塗工部２１ｂに接合される正極接合部５１と、正極端子３に接合される端子接合部５２と、正極接合部５１および端子接合部５２を互いに連結する連結部５３とを有している。正極接合部５１は、発電要素２の巻軸方向（Ｚ方向）の下方側（Ｚ２方向側）に配置されている。また、端子接合部５２は、発電要素２の巻軸方向の上方側（Ｚ１方向側）に配置されている。また、連結部５３は、発電要素２の側面に沿って上下方向（Ｚ方向）に延びるように形成されている。また、正極接合部５１は、図４に示すように、複数の凹部５１１を有している。また、正極接合部５１は、後述するように、積層された正極２１の未塗工部２１ｂを凹部５１１に挟み込んだ状態で発電要素２に接合されるように構成されている。具体的には、正極接合部５１は、凹部５１１に正極２１の未塗工部２１ｂを挟み込んだ状態でかしめ部５１１ａおよび溶接部５１１ｂ（後述する図７および図８参照）を設けることにより発電要素２に接合されている。また、図２に示すように、端子接合部５２には、アルミニウム合金からなる正極端子３がかしめおよび超音波溶接により接合されている。なお、正極接合部５１の凹部５１１は、本発明の「接合部分」の一例である。   As shown in FIG. 2, the positive electrode current collecting terminal 5 is formed by pressing an aluminum alloy plate. In addition, the positive electrode current collecting terminal 5 includes a positive electrode bonding part 51 bonded to the uncoated part 21 b of the positive electrode 21, a terminal bonding part 52 bonded to the positive electrode terminal 3, and the positive electrode bonding part 51 and the terminal bonding part 52. It has the connection part 53 connected mutually. The positive electrode joint 51 is disposed on the lower side (Z2 direction side) of the power generation element 2 in the winding axis direction (Z direction). Further, the terminal joint portion 52 is disposed on the upper side (Z1 direction side) of the power generation element 2 in the winding axis direction. Moreover, the connection part 53 is formed so that it may extend in the up-down direction (Z direction) along the side surface of the electric power generation element 2. As shown in FIG. Moreover, the positive electrode joining part 51 has the some recessed part 511, as shown in FIG. Moreover, the positive electrode joining part 51 is comprised so that it may join to the electric power generation element 2 in the state which pinched | interposed the uncoated part 21b of the laminated | stacked positive electrode 21 in the recessed part 511 so that it may mention later. Specifically, the positive electrode joining portion 51 is provided with a caulking portion 511a and a welding portion 511b (see FIGS. 7 and 8 to be described later) in a state where the uncoated portion 21b of the positive electrode 21 is sandwiched in the concave portion 511. 2 is joined. As shown in FIG. 2, the positive terminal 3 made of an aluminum alloy is joined to the terminal joint 52 by caulking and ultrasonic welding. The concave portion 511 of the positive electrode bonding portion 51 is an example of the “bonding portion” in the present invention.

負極集電端子６は、図２に示すように、銅合金板をプレス加工することにより形成されている。また、負極集電端子６は、負極２２の未塗工部２２ｂに接合される負極接合部６１と、負極端子４に接合される端子接合部６２とを有している。負極接合部６１は、発電要素２の巻軸方向（Ｚ方向）の上方側（Ｚ１方向側）に配置されている。また、端子接合部６２は、発電要素２の巻軸方向の上方側で、負極接合部６１に隣接して配置されている。また、負極接合部６１および端子接合部６２は、互いに連結されている。また、負極接合部６１は、上記の正極接合部５１と同様の構成を有している。具体的には、負極接合部６１は、積層された負極２２の未塗工部２２ｂを凹部６１１に挟み込んだ状態で、かしめおよび超音波溶接により発電要素２に接合されるように構成されている。また、端子接合部６２には、銅合金からなる負極端子４がかしめおよび超音波溶接により接合されている。なお、負極接合部６１の凹部６１１は、本発明の「接合部分」の一例である。   As shown in FIG. 2, the negative electrode current collector terminal 6 is formed by pressing a copper alloy plate. Further, the negative electrode current collecting terminal 6 has a negative electrode bonding part 61 bonded to the uncoated part 22 b of the negative electrode 22 and a terminal bonding part 62 bonded to the negative electrode terminal 4. The negative electrode joining portion 61 is disposed on the upper side (Z1 direction side) of the power generation element 2 in the winding axis direction (Z direction). Further, the terminal joint portion 62 is disposed adjacent to the negative electrode joint portion 61 on the upper side in the winding axis direction of the power generation element 2. The negative electrode joint 61 and the terminal joint 62 are connected to each other. Further, the negative electrode bonding portion 61 has the same configuration as the positive electrode bonding portion 51 described above. Specifically, the negative electrode bonding portion 61 is configured to be bonded to the power generation element 2 by caulking and ultrasonic welding in a state where the uncoated portion 22b of the laminated negative electrode 22 is sandwiched between the concave portions 611. . Further, the negative terminal 4 made of a copper alloy is joined to the terminal joint 62 by caulking and ultrasonic welding. The concave portion 611 of the negative electrode bonding portion 61 is an example of the “bonding portion” in the present invention.

ここで、正極集電端子５の正極接合部５１と正極２１の未塗工部２１ｂとの接合部分の構造について詳細に説明する。なお、負極集電端子６の負極接合部６１と負極２２の未塗工部２２ｂとの接合部分は、正極接合部５１の接合部分と同様の構造を有するため、ここでは、正極集電端子５の正極接合部５１と正極２１の未塗工部２１ｂとの接合部分についてのみ説明する。   Here, the structure of the joint portion between the positive electrode joint portion 51 of the positive electrode current collector terminal 5 and the uncoated portion 21b of the positive electrode 21 will be described in detail. In addition, since the junction part of the negative electrode junction part 61 of the negative electrode current collection terminal 6 and the uncoated part 22b of the negative electrode 22 has the structure similar to the junction part of the positive electrode junction part 51, here the positive electrode current collection terminal 5 Only the joint portion between the positive electrode joint portion 51 and the uncoated portion 21b of the positive electrode 21 will be described.

正極接合部５１は、図４に示すように、発電要素２の巻軸方向（Ｚ方向）から見て、長円筒形状に巻回された正極２１の未塗工部２１ｂのうち、長手方向（Ｘ方向）に略直線状に延びる直線状部に接合されるように構成されている。また、正極接合部５１の凹部５１１は、正極２１の未塗工部２１ｂの接合部分（直線状部）と同じＸ方向に略直線状に延びるように形成されている。また、正極接合部５１の発電要素２側（Ｚ１方向側）の表面には、アルミニウム合金からなる正極接合部５１と積層された正極２１の未塗工部２１ｂとの間の摩擦抵抗を低減するための滑材７が設けられている。なお、滑材７は、本発明の「摩擦低減材」の一例である。   As shown in FIG. 4, the positive electrode joint portion 51 is, as viewed from the winding axis direction (Z direction) of the power generation element 2, the longitudinal direction (of the uncoated portion 21 b of the positive electrode 21 wound in a long cylindrical shape ( It is comprised so that it may join to the linear part extended substantially linearly in a (X direction). Further, the concave portion 511 of the positive electrode bonding portion 51 is formed to extend substantially linearly in the same X direction as the bonding portion (linear portion) of the uncoated portion 21 b of the positive electrode 21. Further, the friction resistance between the positive electrode bonding portion 51 made of an aluminum alloy and the uncoated portion 21b of the laminated positive electrode 21 is reduced on the surface of the positive electrode bonding portion 51 on the power generation element 2 side (Z1 direction side). A sliding material 7 is provided. The lubricant 7 is an example of the “friction reducing material” in the present invention.

滑材７は、正極接合部５１の複数の凹部５１１のそれぞれの入口部分に設けられている。具体的には、滑材７は、凹部５１１のＺ１方向側の端部の表面を覆うように設けられている。また、滑材７は、凹部５１１の入口部分以外の部分（凹部５１１の入口部分よりも奥側の部分）には設けられていない。すなわち、滑材７は、凹部５１１の入口部分の略円弧形状を有するコーナ部（Ｒ部）およびその近傍のみを覆うように設けられている。また、滑材７は、正極接合部５１の凹部５１１が略直線状に延びる方向と同じＸ方向に延びるように形成されている。また、滑材７は、正極接合部５１のＸ方向の一方端から他方端までＸ方向に延びるように形成されている。また、滑材７は、正極２１の未塗工部２１ｂに対する摩擦係数がアルミニウム合金からなる正極接合部５１の凹部５１１よりも小さい摩擦係数を有するテープ状の絶縁性樹脂により構成されている。詳細には、滑材７は、ポリイミドテープからなり、正極接合部５１の上記の部分に貼付されている。   The lubricant 7 is provided at each inlet portion of the plurality of recesses 511 of the positive electrode joint 51. Specifically, the lubricant 7 is provided so as to cover the surface of the end of the recess 511 on the Z1 direction side. Further, the lubricant 7 is not provided in a portion other than the entrance portion of the recess 511 (a portion on the back side of the entrance portion of the recess 511). That is, the lubricant 7 is provided so as to cover only the corner portion (R portion) having a substantially arc shape at the entrance portion of the recess 511 and the vicinity thereof. Moreover, the lubricant 7 is formed so that the recessed part 511 of the positive electrode junction part 51 may extend in the same X direction as the direction in which it extends substantially linearly. The lubricant 7 is formed so as to extend in the X direction from one end in the X direction of the positive electrode joint portion 51 to the other end. Further, the lubricant 7 is made of a tape-like insulating resin having a friction coefficient smaller than that of the concave portion 511 of the positive electrode joint portion 51 made of an aluminum alloy and having a friction coefficient with respect to the uncoated portion 21b of the positive electrode 21. Specifically, the lubricant 7 is made of a polyimide tape and is affixed to the above portion of the positive electrode joint 51.

第１実施形態では、上記のように、正極集電端子５の凹部５１１の入口部分に、発電要素２の積層されたアルミニウム箔（正極２１の金属箔）と正極集電端子５の凹部５１１との間の摩擦抵抗を低減する滑材７を設ける。これによって、発電要素２のアルミニウム箔に対して正極集電端子５を接合位置まで相対的に移動させる際に、滑材７により、発電要素２のアルミニウム箔と正極集電端子５の凹部５１１との間の摩擦抵抗が低減されるので、発電要素２のアルミニウム箔と正極集電端子５の凹部５１１とが相対移動時に直接接触して互いに擦れ合う場合と異なり、発電要素２のアルミニウム箔が損傷を受けたり位置ずれしたりするのを抑制することができる。これにより、発電要素２のアルミニウム箔と正極集電端子５とを適切に接合することができる。   In the first embodiment, as described above, the aluminum foil (metal foil of the positive electrode 21) on which the power generation element 2 is stacked and the concave portion 511 of the positive current collector terminal 5 are formed at the entrance of the concave portion 511 of the positive current collector terminal 5. A sliding material 7 is provided to reduce the frictional resistance between the two. Accordingly, when the positive electrode current collector terminal 5 is moved relative to the joining position relative to the aluminum foil of the power generation element 2, the aluminum foil of the power generation element 2 and the recess 511 of the positive electrode current collector terminal 5 are Unlike the case where the aluminum foil of the power generation element 2 and the recess 511 of the positive electrode current collector terminal 5 are in direct contact with each other and rub against each other, the aluminum foil of the power generation element 2 is damaged. It is possible to suppress receiving and displacement. Thereby, the aluminum foil of the electric power generation element 2 and the positive electrode current collection terminal 5 can be joined appropriately.

また、第１実施形態では、上記のように、正極集電端子５の凹部５１１を、発電要素２のアルミニウム箔のＸ方向に略直線状に延びる直線状部に対応するようにＸ方向に略直線状に延びるように形成するとともに、滑材７を、正極集電端子５のＸ方向に略直線状に延びるように形成された凹部５１１と同じＸ方向に延びるように設ける。このように構成すれば、第１実施形態のように積層されたアルミニウム箔（金属箔）の正極集電端子５に接合される部分（直線状部）および正極集電端子５の凹部５１１が所定方向（Ｘ方向）に直線状に延びている長円筒形電池の場合にも、正極集電端子５の凹部５１１と同じＸ方向に延びる滑材７により、発電要素２のアルミニウム箔と正極集電端子５の凹部５１１との間の摩擦抵抗を効果的に低減することができる。これにより、第１実施形態のような長円筒形電池において、発電要素２のアルミニウム箔が損傷を受けたり位置ずれしたりするのを有効に抑制することができる。   Further, in the first embodiment, as described above, the concave portion 511 of the positive electrode current collecting terminal 5 is approximately in the X direction so as to correspond to the linear portion extending substantially linearly in the X direction of the aluminum foil of the power generation element 2. While forming so that it may extend linearly, the lubricating material 7 is provided so that it may extend in the same X direction as the recessed part 511 formed so that it may extend in the X direction of the positive electrode current collection terminal 5 substantially linearly. If comprised in this way, the part (straight part) joined to the positive electrode current collection terminal 5 of the aluminum foil (metal foil) laminated | stacked like 1st Embodiment, and the recessed part 511 of the positive electrode current collection terminal 5 are predetermined. Even in the case of a long cylindrical battery extending linearly in the direction (X direction), the aluminum foil of the power generating element 2 and the positive electrode current collector are provided by the lubricant 7 extending in the same X direction as the concave portion 511 of the positive electrode current collector terminal 5. The frictional resistance between the terminal 5 and the recess 511 can be effectively reduced. Thereby, in the long cylindrical battery as in the first embodiment, it is possible to effectively suppress the aluminum foil of the power generation element 2 from being damaged or displaced.

また、第１実施形態では、滑材７をアルミニウム合金板からなる正極集電端子５の凹部５１１の入口部分に設ける構成にすることによって、変形し易い発電要素２のアルミニウム箔（正極２１の金属箔）に滑材７を設ける場合と異なり、滑材７を容易に設けることができる。   In the first embodiment, the aluminum foil of the power generating element 2 that easily deforms (the metal of the positive electrode 21) is provided by providing the lubricant 7 at the entrance of the concave portion 511 of the positive electrode current collecting terminal 5 made of an aluminum alloy plate. Unlike the case of providing the lubricant 7 on the foil), the lubricant 7 can be easily provided.

また、第１実施形態では、上記のように、発電要素２のアルミニウム箔（正極２１の金属箔）に対する摩擦係数がアルミニウム合金からなる正極集電端子５の凹部５１１よりも小さい摩擦係数を有するポリイミドテープを貼付することにより滑材７を設ける。このように構成すれば、滑材７を簡便な形成プロセスであるポリイミドテープの貼付により設けることができるので、正極集電端子５の凹部５１１に滑材７を容易に設けることができる。   In the first embodiment, as described above, the polyimide having a friction coefficient smaller than that of the concave portion 511 of the positive electrode current collecting terminal 5 made of an aluminum alloy with respect to the aluminum foil of the power generation element 2 (the metal foil of the positive electrode 21). The lubricant 7 is provided by applying a tape. If comprised in this way, since the lubricating material 7 can be provided by sticking of the polyimide tape which is a simple formation process, the lubricating material 7 can be easily provided in the recessed part 511 of the positive electrode current collection terminal 5. FIG.

また、第１実施形態では、上記のように、正極集電端子５の凹部５１１の入口部分の略円弧形状を有するコーナ部（Ｒ部）に滑材７を設けることによって、積層された正極２１の未塗工部２１ｂを正極集電端子５の凹部５１１に挿入する際に、コーナ部（Ｒ部）により案内されて正極２１の未塗工部２１ｂを凹部５１１に挿入し易くすることができるとともに、挿入の初期段階で積層された正極２１の未塗工部２１ｂが入口部分のコーナ部に設けられた滑材７に接触されるので、正極２１の未塗工部２１ｂ（アルミニウム箔が露出された部分）の損傷や位置ずれを抑制することができる。   Moreover, in 1st Embodiment, as mentioned above, the positive electrode 21 laminated | stacked by providing the lubricant 7 in the corner part (R part) which has a substantially circular arc shape of the entrance part of the recessed part 511 of the positive electrode current collection terminal 5 as mentioned above. When the uncoated portion 21b is inserted into the concave portion 511 of the positive electrode current collecting terminal 5, the uncoated portion 21b of the positive electrode 21 can be easily inserted into the concave portion 511 by being guided by the corner portion (R portion). At the same time, the uncoated portion 21b of the positive electrode 21 laminated in the initial stage of insertion is brought into contact with the lubricant 7 provided at the corner portion of the entrance portion, so that the uncoated portion 21b (the aluminum foil is exposed) of the positive electrode 21. Damage and displacement can be suppressed.

次に、図１〜図８を参照して、本発明の第１実施形態による電池１００の製造方法について説明する。   Next, with reference to FIGS. 1-8, the manufacturing method of the battery 100 by 1st Embodiment of this invention is demonstrated.

まず、図３に示すように、帯状の正極２１と、帯状の負極２２と、帯状のセパレータ２３とを互いに重ね合わせた状態で巻回することにより発電要素２を形成する。この際、正極２１の下端部に設けられた未塗工部２１ｂを負極２２およびセパレータ２３の下端部よりも下方（Ｚ２方向）に突出するように配置する。また、負極２２の上端部に設けられた未塗工部２２ｂを正極２１およびセパレータ２３の上端部よりも上方（Ｚ１方向）に突出するように配置する。   First, as shown in FIG. 3, the power generation element 2 is formed by winding a strip-shaped positive electrode 21, a strip-shaped negative electrode 22, and a strip-shaped separator 23 in a state where they are overlapped with each other. At this time, the uncoated portion 21 b provided at the lower end portion of the positive electrode 21 is disposed so as to protrude downward (Z2 direction) from the lower end portions of the negative electrode 22 and the separator 23. Moreover, the uncoated part 22b provided in the upper end part of the negative electrode 22 is arrange | positioned so that it may protrude above the positive electrode 21 and the upper end part of the separator 23 (Z1 direction).

そして、図２に示すように、正極集電端子５の端子接合部５２に正極端子３を接合するとともに、負極集電端子６の端子接合部６２に負極端子４を接合する。また、図４に示すように、正極接合部５１の凹部５１１の入口部分にポリイミドテープからなる滑材７を貼付する。具体的には、正極接合部５１の凹部５１１の発電要素２側（Ｚ１方向側）の端部（コーナ部）の表面を覆うように、Ｘ方向に延びるポリイミドテープからなる滑材７を貼付する。その後、滑材７が設けられた正極接合部５１の凹部５１１に対して正極２１の未塗工部２１ｂを挿入する。詳細には、発電要素２の巻軸方向の端部（Ｚ２方向側の端部）において、積層された正極２１の未塗工部２１ｂを３つの束に分割した後、分割された３つの束のそれぞれを正極接合部５１の３つの凹部５１１に挿入する。この際、図５に示すように、積層された正極２１のうちの外側に位置する未塗工部２１ｂは、凹部５１１の入口部分に設けられた滑材７の表面に対して摺動しながら凹部５１１内に案内されて挿入される。   Then, as shown in FIG. 2, the positive electrode terminal 3 is bonded to the terminal bonding portion 52 of the positive electrode current collecting terminal 5, and the negative electrode terminal 4 is bonded to the terminal bonding portion 62 of the negative electrode current collecting terminal 6. Also, as shown in FIG. 4, the lubricant 7 made of polyimide tape is attached to the entrance portion of the recess 511 of the positive electrode joint 51. Specifically, the lubricant 7 made of a polyimide tape extending in the X direction is attached so as to cover the surface of the end portion (corner portion) on the power generation element 2 side (Z1 direction side) of the concave portion 511 of the positive electrode joint portion 51. . Thereafter, the uncoated portion 21b of the positive electrode 21 is inserted into the concave portion 511 of the positive electrode joint portion 51 provided with the lubricant 7. Specifically, at the end in the winding axis direction of the power generating element 2 (end on the Z2 direction side), the uncoated portion 21b of the stacked positive electrode 21 is divided into three bundles, and then the three bundles divided. Are inserted into the three recesses 511 of the positive electrode joint 51. At this time, as shown in FIG. 5, the uncoated portion 21 b located outside the stacked positive electrodes 21 slides on the surface of the lubricant 7 provided at the entrance portion of the recess 511. It is guided and inserted into the recess 511.

すなわち、積層された正極２１のうちの外側に位置する未塗工部２１ｂは、正極接合部５１が発電要素２に対して相対的に挿入される際に、正極接合部５１の凹部５１１の挿入方向の先端部側（Ｚ１方向側）に設けられた滑材７に対して当接して摺動する。これにより、発電要素２の正極２１の未塗工部２１ｂに対して正極集電端子５の凹部５１１を相対的に接合位置まで移動（挿入）する際に、滑材７により、正極２１の未塗工部２１ｂと正極集電端子５の凹部５１１との間の摩擦抵抗が低減されるので、正極２１の未塗工部２１ｂと正極集電端子５の凹部５１１とが相対移動時に直接接触して互いに擦れ合う場合と異なり、正極２１の未塗工部２１ｂが損傷を受けたり位置ずれしたりするのが抑制される。その結果、後述する接合工程において、正極２１の未塗工部２１ｂと正極集電端子５とを適切に接合することが可能となる。   That is, the uncoated portion 21b located outside the stacked positive electrodes 21 is inserted into the concave portions 511 of the positive electrode joint portion 51 when the positive electrode joint portion 51 is inserted relative to the power generation element 2. It slides in contact with the sliding material 7 provided on the tip end side (Z1 direction side) in the direction. Accordingly, when the concave portion 511 of the positive electrode current collecting terminal 5 is moved (inserted) relative to the uncoated portion 21 b of the positive electrode 21 of the power generation element 2 to the joining position, the lubricant 7 causes the non-positive portion of the positive electrode 21 to be unattached. Since the frictional resistance between the coated portion 21b and the concave portion 511 of the positive current collecting terminal 5 is reduced, the uncoated portion 21b of the positive electrode 21 and the concave portion 511 of the positive current collecting terminal 5 are in direct contact with each other during relative movement. Unlike the case of rubbing each other, the uncoated portion 21b of the positive electrode 21 is prevented from being damaged or displaced. As a result, it becomes possible to appropriately join the uncoated portion 21b of the positive electrode 21 and the positive electrode current collecting terminal 5 in the joining step described later.

そして、図６に示すように、正極２１の未塗工部２１ｂを凹部５１１内の接合位置まで移動（摺動）させた後、図７に示すように、凹部５１１の内側に向かって正極接合部５１をかしめてかしめ部５１１ａを形成することにより正極接合部５１と発電要素２の正極２１の未塗工部２１ｂとを接合する。さらに、図８に示すように、かしめ部５１１ａに超音波溶接を行って溶接部５１１ｂを形成することにより正極接合部５１と発電要素２の正極２１の未塗工部２１ｂとを強固に接合する。この際、発電要素２の正極２１の未塗工部２１ｂは、凹部５１１の滑材７が設けられた部分以外のかしめ部５１１ａおよび溶接部５１１ｂにおいて凹部５１１と接合される。これにより、第１実施形態のように滑材７として絶縁性を有するポリイミドテープを用いた場合でも、正極接合部５１と発電要素２の正極２１の未塗工部２１ｂとを確実に電気的に接続することが可能である。   Then, as shown in FIG. 6, after moving (sliding) the uncoated portion 21 b of the positive electrode 21 to the joining position in the recess 511, the positive electrode joining is performed toward the inside of the recess 511 as shown in FIG. 7. By caulking the part 51 to form the caulking part 511a, the positive electrode joining part 51 and the uncoated part 21b of the positive electrode 21 of the power generating element 2 are joined. Further, as shown in FIG. 8, ultrasonic welding is performed on the caulking portion 511 a to form the welded portion 511 b, thereby firmly joining the positive electrode joint portion 51 and the uncoated portion 21 b of the positive electrode 21 of the power generation element 2. . At this time, the uncoated portion 21b of the positive electrode 21 of the power generation element 2 is joined to the concave portion 511 at the caulking portion 511a and the welding portion 511b other than the portion where the lubricant 7 of the concave portion 511 is provided. Thereby, even when the polyimide tape which has insulation is used as the sliding material 7 like 1st Embodiment, the positive electrode joining part 51 and the uncoated part 21b of the positive electrode 21 of the electric power generation element 2 are ensured electrically. It is possible to connect.

また、負極側についても、図２に示すように、上記の正極側と同様に、負極接合部６１の凹部６１１の入口部分に滑材７を設けた状態で、負極２２の未塗工部２２ｂを負極接合部６１の凹部６１１に挿入した後、負極接合部６１と発電要素２の負極２２とをかしめおよび超音波溶接により接合する。   Also on the negative electrode side, as shown in FIG. 2, the uncoated portion 22 b of the negative electrode 22 with the lubricant 7 provided at the entrance of the concave portion 611 of the negative electrode joint portion 61 as in the case of the positive electrode side. Is inserted into the recess 611 of the negative electrode joint 61, and the negative electrode joint 61 and the negative electrode 22 of the power generation element 2 are joined by caulking and ultrasonic welding.

その後、図１に示すように、正極集電端子５および負極集電端子６が取り付けられた発電要素２（図２参照）を非水系電解液とともに電池ケース１内に収納する。そして、正極端子３および負極端子４を上方に突出させた状態で蓋部１１により電池ケース１を封止する。このようにして、本発明の第１実施形態による電池１００が製造される。   Thereafter, as shown in FIG. 1, the power generation element 2 (see FIG. 2) to which the positive electrode current collector terminal 5 and the negative electrode current collector terminal 6 are attached is housed in the battery case 1 together with the non-aqueous electrolyte. Then, the battery case 1 is sealed by the lid 11 with the positive electrode terminal 3 and the negative electrode terminal 4 protruding upward. Thus, the battery 100 according to the first embodiment of the present invention is manufactured.

（第２実施形態）
次に、第２実施形態について説明する。この第２実施形態では、発電要素２の正極２１のアルミニウム箔と正極集電端子５の凹部５１１とを接合させる上記第１実施形態とは異なり、発電要素２０２の正極２２１のアルミニウム箔と正極集電端子２０５の平板状の接続板部２５１ａ〜２５１ｄとを接合させる構成について説明する。 (Second Embodiment)
Next, a second embodiment will be described. In the second embodiment, unlike the first embodiment in which the aluminum foil of the positive electrode 21 of the power generating element 2 and the concave portion 511 of the positive current collecting terminal 5 are joined, the aluminum foil and the positive electrode collector of the positive electrode 221 of the power generating element 202 are combined. The structure which joins the flat connection board part 251a-251d of the electrical terminal 205 is demonstrated.

本発明の第２実施形態による電池２００は、図９に示すように、角形のリチウムイオン電池であり、上面が開口した直方体の箱型形状を有する電池ケース２０１を含んでいる。また、図９および図１０に示すように、電池ケース２０１の内部には、金属箔を含む長円筒形状の発電要素２０２が２つ収納されている。また、２つの発電要素２０２は、互いに平坦な側面を当接させた状態で隣接するように配置されている。また、電池２００には、図９に示すように、電池ケース２０１の蓋部２１１から上方に突出するように正極端子２０３および負極端子２０４が設けられている。また、電池２００は、図１０に示すように、正極端子２０３を発電要素２０２に電気的に接続する正極集電端子２０５と、負極端子２０４を発電要素２０２に電気的に接続する負極集電端子２０６とをさらに備えている。また、図９に示すように、正極集電端子２０５と正極端子２０３との間には、蓋部２１１と蓋部２１１を上下方向（Ｚ方向）から挟み込む一対の絶縁封止材２０３ａとが設けられている。また、負極集電端子２０６と負極端子２０４との間には、蓋部２１１と蓋部２１１を上下方向から挟み込む一対の絶縁封止材２０４ａとが設けられている。   As shown in FIG. 9, the battery 200 according to the second embodiment of the present invention is a rectangular lithium ion battery, and includes a battery case 201 having a rectangular parallelepiped box shape with an open top surface. Further, as shown in FIGS. 9 and 10, two long cylindrical power generation elements 202 including metal foil are accommodated in the battery case 201. Further, the two power generation elements 202 are arranged so as to be adjacent to each other with their flat side surfaces in contact with each other. Further, as shown in FIG. 9, the battery 200 is provided with a positive electrode terminal 203 and a negative electrode terminal 204 so as to protrude upward from the lid portion 211 of the battery case 201. In addition, as shown in FIG. 10, the battery 200 includes a positive current collecting terminal 205 that electrically connects the positive terminal 203 to the power generating element 202 and a negative current collecting terminal that electrically connects the negative terminal 204 to the power generating element 202. 206. Further, as shown in FIG. 9, between the positive electrode current collecting terminal 205 and the positive electrode terminal 203, a lid portion 211 and a pair of insulating sealing materials 203 a that sandwich the lid portion 211 from the vertical direction (Z direction) are provided. It has been. Further, between the negative electrode current collecting terminal 206 and the negative electrode terminal 204, a lid 211 and a pair of insulating sealing materials 204a that sandwich the lid 211 from the vertical direction are provided.

発電要素２０２は、上記第１実施形態の発電要素２と同様の構成を有している。具体的には、発電要素２０２は、金属箔（アルミニウム箔）を含む正極２２１、金属箔（銅箔）を含む負極２２２、および、セパレータ２２３が巻回されることにより形成されている。また、正極２２１の未塗工部２２１ｂは、巻軸方向（Ｘ方向）の一方端部（Ｘ１方向側の端部）において、負極２２２およびセパレータ２２３のＸ１方向側の端部よりもＸ１方向に突出するように配置されている。また、負極２２２の未塗工部２２２ｂは、巻軸方向（Ｘ方向）の他方端部（Ｘ２方向側の端部）において、正極２２１およびセパレータ２２３のＸ２方向側の端部よりもＸ２方向に突出するように配置されている。   The power generation element 202 has the same configuration as that of the power generation element 2 of the first embodiment. Specifically, the power generation element 202 is formed by winding a positive electrode 221 including a metal foil (aluminum foil), a negative electrode 222 including a metal foil (copper foil), and a separator 223. Further, the uncoated portion 221b of the positive electrode 221 is in the X1 direction at one end portion (the end portion on the X1 direction side) in the winding axis direction (X direction) in the X1 direction from the end portion on the X1 direction side of the negative electrode 222 and the separator 223. It is arranged to protrude. In addition, the uncoated portion 222b of the negative electrode 222 is in the X2 direction at the other end portion (end portion on the X2 direction side) in the winding axis direction (X direction) in the X2 direction from the end portions on the X2 direction side of the positive electrode 221 and the separator 223. It is arranged to protrude.

正極集電端子２０５は、アルミニウム合金板により構成されている。また、正極集電端子２０５は、図１０に示すように、発電要素２０２の正極２２１の未塗工部２２１ｂに接合される正極接合部２５１と、正極端子２０３に接合される端子接合部２５２とを有している。正極接合部２５１は、発電要素２０２の巻軸方向（Ｘ方向）の一方側（Ｘ１方向側）に配置されている。また、端子接合部２５２は、発電要素２０２の上方側（Ｚ１方向側）に配置されている。また、正極接合部２５１および端子接合部２５２は互いに連結されている。また、正極接合部２５１は、分岐された４本の接続板部２５１ａ、２５１ｂ、２５１ｃおよび２５１ｄを有しているとともに、４本の接続板部２５１ａ〜２５１ｄは、端子接合部２５２側の部分で互いに電気的に接続されている。これら４本の接続板部２５１ａ〜２５１ｄは、平板状に形成されている。また、隣接する２本の接続板部２５１ａおよび２５１ｂ（接続板部２５１ｃおよび２５１ｄ）は、後述するように、互いの間に２つの発電要素２０２のうちの一方（他方）を挟み込んだ状態で正極２２１の未塗工部２２１ｂに接合されるように構成されている。なお、接続板部２５１ａ〜２５１ｄは、本発明の「接合部分」の一例である。   The positive electrode current collecting terminal 205 is made of an aluminum alloy plate. Further, as shown in FIG. 10, the positive electrode current collecting terminal 205 includes a positive electrode bonding portion 251 bonded to the uncoated portion 221 b of the positive electrode 221 of the power generation element 202, and a terminal bonding portion 252 bonded to the positive electrode terminal 203. have. The positive electrode joining portion 251 is disposed on one side (X1 direction side) of the power generation element 202 in the winding axis direction (X direction). Further, the terminal joint portion 252 is disposed on the upper side (Z1 direction side) of the power generation element 202. Further, the positive electrode junction 251 and the terminal junction 252 are connected to each other. Further, the positive electrode joint portion 251 has four connection plate portions 251a, 251b, 251c, and 251d branched, and the four connection plate portions 251a to 251d are portions on the terminal joint portion 252 side. They are electrically connected to each other. These four connection plate portions 251a to 251d are formed in a flat plate shape. Further, the two adjacent connection plate portions 251a and 251b (connection plate portions 251c and 251d) are positive electrodes in a state where one (the other) of the two power generation elements 202 is sandwiched between each other, as will be described later. It is comprised so that it may join to the uncoated part 221b of 221. The connection plate portions 251a to 251d are examples of the “joining portion” in the present invention.

負極集電端子２０６は、銅合金板からなる。また、負極集電端子２０６は、上記の正極集電端子２０５と同様の形状を有している。すなわち、負極集電端子２０６は、正極集電端子２０５の正極接合部２５１、端子接合部２５２および４本の接続板部２５１ａ〜２５１ｄのそれぞれに対応する、負極接合部２６１、端子接合部２６２および４本の接続板部２６１ａ〜２６１ｄを有している。また、負極接合部２６１は、発電要素２０２の巻軸方向（Ｘ方向）の他方側（Ｘ２方向側）に配置されている。また、端子接合部２６２は、発電要素２０２の上方側（Ｚ１方向側）に配置されている。また、負極接合部２６１は、発電要素２０２の負極２２２の未塗工部２２２ｂに接合されるように構成されている。詳細には、隣接する２本の接続板部２６１ａおよび２６１ｂ（接続板部２６１ｃおよび２６１ｄ）は、後述するように、互いの間に２つの発電要素２０２のうちの一方（他方）を挟み込んだ状態で負極２２２の未塗工部２２２ｂに接合されるように構成されている。なお、接続板部２６１ａ〜２６１ｄは、本発明の「接合部分」の一例である。   The negative electrode current collector terminal 206 is made of a copper alloy plate. The negative electrode current collector terminal 206 has the same shape as the positive electrode current collector terminal 205 described above. That is, the negative electrode current collector terminal 206 includes a negative electrode joint portion 261, a terminal joint portion 262 corresponding to the positive electrode joint portion 251, the terminal joint portion 252, and the four connection plate portions 251 a to 251 d of the positive current collector terminal 205. There are four connection plate portions 261a to 261d. The negative electrode joint 261 is disposed on the other side (X2 direction side) of the power generation element 202 in the winding axis direction (X direction). Further, the terminal joint portion 262 is disposed on the upper side (Z1 direction side) of the power generation element 202. In addition, the negative electrode bonding portion 261 is configured to be bonded to the uncoated portion 222 b of the negative electrode 222 of the power generation element 202. Specifically, two adjacent connection plate portions 261a and 261b (connection plate portions 261c and 261d) sandwich one (the other) of the two power generation elements 202 between each other, as will be described later. It is comprised so that it may join to the uncoated part 222b of the negative electrode 222. The connection plate portions 261a to 261d are examples of the “joining portion” in the present invention.

ここで、第２実施形態の正極集電端子２０５の正極接合部２５１と正極２２１の未塗工部２２１ｂとの接合部分の構造について詳細に説明する。なお、負極集電端子２０６の負極接合部２６１と負極２２２の未塗工部２２２ｂとの接合部分は、正極接合部２５１の接合部分と同様の構造を有するため、ここでは、正極集電端子２０５の正極接合部２５１と正極２２１の未塗工部２２１ｂとの接合部分についてのみ説明する。   Here, the structure of the joint portion between the positive electrode joint portion 251 of the positive electrode current collector terminal 205 of the second embodiment and the uncoated portion 221b of the positive electrode 221 will be described in detail. In addition, since the junction part of the negative electrode junction part 261 of the negative electrode current collection terminal 206 and the uncoated part 222b of the negative electrode 222 has the same structure as the junction part of the positive electrode junction part 251, here, the positive electrode current collection terminal 205 is shown. Only the joint portion between the positive electrode joint portion 251 and the uncoated portion 221b of the positive electrode 221 will be described.

正極接合部２５１は、図１０に示すように、発電要素２０２の巻軸方向（Ｘ方向）から見て、長円筒形状に巻回された正極２２１の未塗工部２２１ｂのうち、長手方向（Ｚ方向）に略直線状に延びる部分に接合されるように構成されている。また、正極接合部２５１の分岐された４本の接続板部２５１ａ〜２５１ｄは、正極２２１の未塗工部２２１ｂの接合部分と同じＺ方向に延びるように形成されている。また、４本の接続板部２５１ａ〜２５１ｄの発電要素２０２側（Ｘ２方向側）の部分には、図１０および図１１に示すように、アルミニウム合金からなる正極接合部２５１と積層された正極２２１の未塗工部２２１ｂとの間の摩擦抵抗を低減するための滑材２０７が設けられている。なお、滑材２０７は、本発明の「摩擦低減材」の一例である。   As shown in FIG. 10, the positive electrode joining portion 251 has a longitudinal direction (of the uncoated portion 221 b of the positive electrode 221 wound in a long cylindrical shape as viewed from the winding axis direction (X direction) of the power generation element 202. It is configured to be joined to a portion extending substantially linearly in the Z direction). Further, the four connection plate portions 251a to 251d branched from the positive electrode bonding portion 251 are formed to extend in the same Z direction as the bonding portion of the uncoated portion 221b of the positive electrode 221. Moreover, as shown in FIG. 10 and FIG. 11, the positive electrode 221 laminated | stacked with the positive electrode junction part 251 which consists of aluminum alloys in the part by the side of the electric power generation element 202 (X2 direction side) of the four connection board parts 251a-251d. A sliding material 207 for reducing the frictional resistance with the uncoated portion 221b is provided. The sliding material 207 is an example of the “friction reducing material” in the present invention.

滑材２０７は、接続板部２５１ａ〜２５１ｄのＸ２方向側の端部を覆うように設けられている。また、滑材２０７は、接続板部２５１ａ〜２５１ｄのＸ２方向側の端部以外の部部には設けられていない。また、滑材２０７は、４本の接続板部２５１ａ〜２５１ｄが延びるＺ方向に延びるように貼付されている。また、滑材２０７は、上記第１実施形態の滑材７と同様に、ポリイミドテープにより構成されている。   The lubricant 207 is provided so as to cover the ends of the connection plate portions 251a to 251d on the X2 direction side. Moreover, the sliding material 207 is not provided in parts other than the edge part by the side of the X2 direction of the connection board parts 251a-251d. The sliding material 207 is attached so as to extend in the Z direction in which the four connection plate portions 251a to 251d extend. Moreover, the sliding material 207 is comprised with the polyimide tape similarly to the sliding material 7 of the said 1st Embodiment.

また、各接続板部２５１ａ〜２５１ｄは、図９および図１０に示すように、発電要素２０２が配置される側とは反対側（Ｘ１方向側）から、挟持板２０８により覆われた状態で超音波溶接による溶接部２５１ｅ（図１５参照）により発電要素２０２に接合されるように構成されている。挟持板２０８は、４本の接続板部２５１ａ〜２５１ｄに対応して４つ設けられている。また、挟持板２０８は、略Ｖ字の断面形状を有し、接続板部２５１ａ〜２５１ｄが延びるＺ方向に延びるように形成されている。また、正極側の挟持板２０８は、正極集電端子２０５と同様に、アルミニウム合金板により構成されている。また、負極側の挟持板２０９は、負極集電端子２０６と同様に、銅合金板により構成されている。   Further, as shown in FIGS. 9 and 10, each of the connecting plate portions 251a to 251d is super-covered with the sandwiching plate 208 from the side opposite to the side where the power generating element 202 is disposed (X1 direction side). It is comprised so that it may join to the electric power generation element 202 by the welding part 251e (refer FIG. 15) by sonic welding. Four clamping plates 208 are provided corresponding to the four connection plate portions 251a to 251d. The sandwiching plate 208 has a substantially V-shaped cross-sectional shape and is formed so as to extend in the Z direction in which the connection plate portions 251a to 251d extend. The positive-side clamping plate 208 is made of an aluminum alloy plate, like the positive-electrode current collecting terminal 205. Also, the holding plate 209 on the negative electrode side is made of a copper alloy plate, similarly to the negative electrode current collecting terminal 206.

第２実施形態では、上記のように、正極集電端子２０５の平板状に形成された隣接する接続板部２５１ａおよび２５１ｂに、発電要素２０２の積層されたアルミニウム箔（正極２２１の金属箔）と正極集電端子２０５の接続板部２５１ａおよび２５１ｂとの間の摩擦抵抗を低減する滑材２０７を設ける。これによって、発電要素２０２のアルミニウム箔に対して正極集電端子２０５を接合位置まで相対的に移動させる際に、滑材２０７により、発電要素２０２のアルミニウム箔と正極集電端子２０５の接続板部２５１ａおよび２５１ｂとの間の摩擦抵抗が低減されるので、発電要素２０２のアルミニウム箔と正極集電端子２０５の接続板部２５１ａおよび２５１ｂとが相対移動時に直接接触して互いに擦れ合う場合と異なり、発電要素２０２のアルミニウム箔が損傷を受けたり位置ずれしたりするのを抑制することができる。これにより、発電要素２０２のアルミニウム箔と正極集電端子２０５の平板状に形成された接続板部２５１ａおよび２５１ｂとが接合される第２実施形態の構成でも、発電要素２０２のアルミニウム箔と正極集電端子２０５とを適切に接合することができる。   In the second embodiment, as described above, the aluminum foil (metal foil of the positive electrode 221) in which the power generation element 202 is laminated on the adjacent connection plate portions 251a and 251b formed in a flat plate shape of the positive electrode current collecting terminal 205 and A sliding material 207 for reducing the frictional resistance between the connecting plate portions 251a and 251b of the positive electrode current collecting terminal 205 is provided. Accordingly, when the positive electrode current collector terminal 205 is moved relative to the aluminum foil of the power generation element 202 to the joining position, the connecting plate portion of the aluminum foil of the power generation element 202 and the positive electrode current collector terminal 205 is moved by the lubricant 207. Unlike the case where the aluminum foil of the power generation element 202 and the connecting plate portions 251a and 251b of the positive electrode current collecting terminal 205 are in direct contact with each other and rub against each other because the frictional resistance between 251a and 251b is reduced. The aluminum foil of the element 202 can be prevented from being damaged or displaced. Thus, even in the configuration of the second embodiment in which the aluminum foil of the power generation element 202 and the connecting plate portions 251a and 251b formed in the flat plate shape of the positive electrode current collecting terminal 205 are joined, the aluminum foil and the positive electrode current collector of the power generation element 202 are joined. The electrical terminal 205 can be appropriately joined.

次に、図９〜図１５を参照して、本発明の第２実施形態による電池２００の製造方法について説明する。   Next, with reference to FIGS. 9-15, the manufacturing method of the battery 200 by 2nd Embodiment of this invention is demonstrated.

まず、上記第１実施形態と同様に、帯状の正極２２１と、帯状の負極２２２と、帯状のセパレータ２２３とを互いに重ね合わせた状態で巻回することにより発電要素２０２を形成する。この際、正極２２１の一方端部（Ｘ１方向側の端部）に設けられた未塗工部２２１ｂを負極２２２およびセパレータ２２３よりも一方側（Ｘ１方向側）に突出するように配置する。また、負極２２２の他方端部（Ｘ２方向側の端部）に設けられた未塗工部２２２ｂを正極２２１およびセパレータ２２３よりも他方側（Ｘ２方向側）に突出するように配置する。このような発電要素２０２を２つ形成し、２つの発電要素２０２を互いに平坦な側面が当接するように隣接して配置する。   First, as in the first embodiment, the power generation element 202 is formed by winding a strip-shaped positive electrode 221, a strip-shaped negative electrode 222, and a strip-shaped separator 223 in a state where they are overlapped with each other. At this time, the uncoated portion 221b provided at one end portion (end portion on the X1 direction side) of the positive electrode 221 is disposed so as to protrude to one side (X1 direction side) from the negative electrode 222 and the separator 223. Further, the uncoated portion 222b provided at the other end portion (end portion on the X2 direction side) of the negative electrode 222 is disposed so as to protrude to the other side (X2 direction side) from the positive electrode 221 and the separator 223. Two such power generation elements 202 are formed, and the two power generation elements 202 are arranged adjacent to each other such that their flat side surfaces are in contact with each other.

そして、図９に示すように、正極集電端子２０５の端子接合部２５２（図１０参照）と正極端子２０３との間に、蓋部２１１と蓋部２１１を上下方向（Ｚ方向）から挟み込む一対の絶縁封止材２０３ａとを配置した状態で正極集電端子２０５の端子接合部２５２と正極端子２０３とを接合する。また、これと同様に、負極集電端子２０６の端子接合部２６２（図１０参照）と負極端子２０４との間に、蓋部２１１と蓋部２１１を上下方向から挟み込む一対の絶縁封止材２０４ａとを配置した状態で負極集電端子２０６の端子接合部２６２と負極端子２０４とを接合する。   Then, as shown in FIG. 9, a pair of the lid portion 211 and the lid portion 211 sandwiched between the terminal joining portion 252 (see FIG. 10) of the positive electrode current collecting terminal 205 and the positive electrode terminal 203 from the vertical direction (Z direction). The terminal bonding portion 252 of the positive electrode current collecting terminal 205 and the positive electrode terminal 203 are bonded in a state where the insulating sealing material 203a is disposed. Similarly, a pair of insulating sealing materials 204a sandwiching the lid portion 211 and the lid portion 211 from above and below between the terminal joint portion 262 (see FIG. 10) of the negative electrode current collecting terminal 206 and the negative electrode terminal 204. The terminal joint 262 of the negative current collector terminal 206 and the negative terminal 204 are joined together.

そして、図１０および図１１に示すように、正極接合部２５１の４本の接続板部２５１ａ〜２５１ｄの発電要素２０２側の端部（Ｘ２方向側の端部）を覆うように、Ｚ方向に延びるポリイミドテープからなる滑材２０７を貼付する。その後、図１２に示すように、積層された正極２２１の未塗工部２２１ｂを巻軸中心線を境にして２つの束に分割した状態で、滑材２０７が設けられた正極接合部２５１の隣接する２本の接続板部２５１ａおよび２５１ｂ（接続板部２５１ｃおよび２５１ｄ）に対して２つの発電要素２０２のうちの一方（他方）を挿入する。詳細には、発電要素２０２の巻軸方向の端部（Ｘ１方向側の端部）において、積層された正極２２１の未塗工部２２１ｂを隣接する２本の接続板部２５１ａおよび２５１ｂ（接続板部２５１ｃおよび２５１ｄ）の間に挿入する。この際、図１２に示すように、積層された正極２２１のうちの外側に位置する未塗工部２２１ｂは、隣接する２本の接続板部２５１ａおよび２５１ｂ（接続板部２５１ｃおよび２５１ｄ）に設けられた滑材２０７の表面に対して摺動しながら２本の接続板部２５１ａおよび２５１ｂ（接続板部２５１ｃおよび２５１ｄ）の間に案内されて挿入される。   Then, as shown in FIGS. 10 and 11, the four connecting plate portions 251 a to 251 d of the positive electrode joint portion 251 are arranged in the Z direction so as to cover the end portions on the power generation element 202 side (end portions on the X2 direction side). A sliding material 207 made of an extending polyimide tape is attached. Thereafter, as shown in FIG. 12, the uncoated portion 221b of the laminated positive electrode 221 is divided into two bundles with the winding axis center line as a boundary, and the positive electrode joint portion 251 provided with the lubricant 207 is provided. One (the other) of the two power generation elements 202 is inserted into two adjacent connection plate portions 251a and 251b (connection plate portions 251c and 251d). Specifically, two connecting plate portions 251a and 251b (connecting plates) adjacent to the uncoated portion 221b of the stacked positive electrode 221 at the end portion (the end portion on the X1 direction side) of the power generating element 202 in the winding axis direction. Between the portions 251c and 251d). At this time, as shown in FIG. 12, the uncoated portion 221b located outside the stacked positive electrodes 221 is provided on the two adjacent connection plate portions 251a and 251b (connection plate portions 251c and 251d). The sliding member 207 is guided and inserted between the two connection plate portions 251a and 251b (connection plate portions 251c and 251d) while sliding with respect to the surface of the sliding member 207.

すなわち、積層された正極２２１の未塗工部２２１ｂは、接続板部２５１ａ〜２５１ｄが発電要素２０２に対して相対的に挿入される際に、接続板部２５１ａ〜２５１ｄの挿入方向の先端部側（Ｘ２方向側）に設けられた滑材２０７に対して当接して摺動する。これにより、発電要素２０２の正極２２１の未塗工部２２１ｂに対して正極集電端子２０５の隣接する接続板部２５１ａおよび２５１ｂ（接続板部２５１ｃおよび２５１ｄ）を相対的に接合位置まで移動（挿入）する際に、滑材２０７により、正極２２１の未塗工部２２１ｂと正極集電端子２０５の接続板部２５１ａおよび２５１ｂ（接続板部２５１ｃおよび２５１ｄ）との間の摩擦抵抗が低減されるので、正極２２１の未塗工部２２１ｂと正極集電端子２０５の接続板部２５１ａおよび２５１ｂ（接続板部２５１ｃおよび２５１ｄ）とが相対移動時に直接接触して互いに擦れ合う場合と異なり、正極２２１の未塗工部２２１ｂが損傷を受けたり位置ずれしたりするのが抑制される。その結果、後述する接合工程において、正極２２１の未塗工部２２１ｂと正極集電端子２０５とを適切に接合することが可能となる。   That is, the uncoated portion 221b of the stacked positive electrode 221 is located on the distal end side in the insertion direction of the connection plate portions 251a to 251d when the connection plate portions 251a to 251d are inserted relative to the power generation element 202. It slides in contact with the sliding material 207 provided on the (X2 direction side). As a result, the adjacent connection plate portions 251a and 251b (connection plate portions 251c and 251d) of the positive electrode current collecting terminal 205 are moved relative to the uncoated portion 221b of the positive electrode 221 of the power generation element 202 (insertion). ), The friction material 207 reduces the frictional resistance between the uncoated portion 221b of the positive electrode 221 and the connection plate portions 251a and 251b (connection plate portions 251c and 251d) of the positive electrode current collecting terminal 205. Unlike the case where the uncoated portion 221b of the positive electrode 221 and the connecting plate portions 251a and 251b (the connecting plate portions 251c and 251d) of the positive electrode current collecting terminal 205 are in direct contact with each other and rub against each other, the uncoated portion of the positive electrode 221 It is suppressed that the work part 221b is damaged or displaced. As a result, it becomes possible to appropriately join the uncoated portion 221b of the positive electrode 221 and the positive electrode current collecting terminal 205 in the joining step described later.

そして、図１３に示すように、正極２２１の未塗工部２２１ｂを隣接する２本の接続板部２５１ａおよび２５１ｂ（接続板部２５１ｃおよび２５１ｄ）の間の接合位置まで移動（摺動）させた後、図１４に示すように、挟持板２０８により、分割された２つの束のそれぞれを対応する接続板部２５１ａ〜２５１ｄとともに挟持する。その後、図１５に示すように、挟持板２０８の外側からかしめるとともに超音波溶接を行って溶接部２５１ｅを設けることにより接続板部２５１ａ〜２５１ｄと発電要素２０２の正極２２１の未塗工部２２１ｂとを接合する。この際、発電要素２０２の正極２２１の未塗工部２２１ｂは、接続板部２５１ａ〜２５１ｄの滑材２０７が設けられた部分以外の溶接部２５１ｅにおいて接続板部２５１ａ〜２５１ｄと接合される。これにより、第２実施形態のように滑材２０７に絶縁性のポリイミドテープを用いた場合でも、正極接合部２５１と発電要素２０２の正極２２１の未塗工部２２１ｂとを確実に電気的に接続することが可能である。   Then, as shown in FIG. 13, the uncoated portion 221b of the positive electrode 221 is moved (slid) to the joining position between the adjacent two connection plate portions 251a and 251b (connection plate portions 251c and 251d). Thereafter, as shown in FIG. 14, the two divided bundles are held together with the corresponding connection plate portions 251 a to 251 d by the holding plate 208. Thereafter, as shown in FIG. 15, caulking from the outside of the sandwiching plate 208 and ultrasonic welding is performed to provide a welded portion 251 e, thereby connecting the connection plate portions 251 a to 251 d and the uncoated portion 221 b of the positive electrode 221 of the power generation element 202. And join. At this time, the uncoated portion 221b of the positive electrode 221 of the power generation element 202 is joined to the connection plate portions 251a to 251d at the welded portion 251e other than the portion provided with the lubricant 207 of the connection plate portions 251a to 251d. Thereby, even when an insulating polyimide tape is used for the sliding material 207 as in the second embodiment, the positive electrode joining portion 251 and the uncoated portion 221b of the positive electrode 221 of the power generation element 202 are reliably electrically connected. Is possible.

また、負極側についても、図１０に示すように、上記の正極側と同様に、負極接合部２６１の接続板部２６１ａ〜２６１ｄに滑材２０７を設けた状態で、負極２２２の未塗工部２２２ｂを隣接する２本の接続板部２６１ａおよび２６１ｂ（接続板部２６１ｃおよび２６１ｄ）の間に挿入した後、挟持板２０９により挟持した負極接合部２６１の接続板部２６１ａ〜２６１ｄと発電要素２０２の負極２２２とをかしめおよび超音波溶接により接合する。   Also on the negative electrode side, as shown in FIG. 10, the uncoated portion of the negative electrode 222 with the lubricant 207 provided on the connection plate portions 261 a to 261 d of the negative electrode joint portion 261, as with the positive electrode side described above. After inserting 222b between two adjacent connection plate portions 261a and 261b (connection plate portions 261c and 261d), the connection plate portions 261a to 261d of the negative electrode joint 261 sandwiched by the sandwich plate 209 and the power generation element 202 The negative electrode 222 is joined by caulking and ultrasonic welding.

その後、図９に示すように、正極集電端子２０５および負極集電端子２０６が取り付けられた発電要素２０２を非水系電解液とともに電池ケース２０１内に収納するとともに、蓋部２１１により電池ケース２０１を封止する。このようにして、本発明の第２実施形態による電池２００が製造される。   After that, as shown in FIG. 9, the power generation element 202 to which the positive electrode current collector terminal 205 and the negative electrode current collector terminal 206 are attached is housed in the battery case 201 together with the non-aqueous electrolyte, and the battery case 201 is held by the lid portion 211. Seal. In this way, the battery 200 according to the second embodiment of the present invention is manufactured.

なお、第２実施形態のその他の構成は、上記第１実施形態と同様である。   In addition, the other structure of 2nd Embodiment is the same as that of the said 1st Embodiment.

なお、第２実施形態のその他の効果は、上記第１実施形態と同様である。   The remaining effects of the second embodiment are similar to those of the aforementioned first embodiment.

なお、今回開示された実施形態は、すべての点で例示であって制限的なものではないと考えられるべきである。本発明の範囲は、上記した実施形態の説明ではなく特許請求の範囲によって示され、さらに特許請求の範囲と均等の意味および範囲内でのすべての変更が含まれる。   The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above description of the embodiments but by the scope of claims for patent, and further includes all modifications within the meaning and scope equivalent to the scope of claims for patent.

たとえば、上記第１および第２実施形態では、本発明の発電要素の一例として、正極、負極およびセパレータを巻回して形成した巻回型の発電要素を示したが、本発明はこれに限られない。本発明では、正極、負極およびセパレータを積層して形成した積層型の発電要素であってもよい。この積層型の発電要素では、正極または負極の未塗工部が発電要素の一方の端部に露出するように積層することによって積層された金属箔が形成される。   For example, in the first and second embodiments, the winding type power generation element formed by winding the positive electrode, the negative electrode, and the separator is shown as an example of the power generation element of the present invention. However, the present invention is not limited to this. Absent. In the present invention, a laminated power generation element formed by laminating a positive electrode, a negative electrode, and a separator may be used. In this laminated type power generation element, a laminated metal foil is formed by laminating so that the uncoated portion of the positive electrode or the negative electrode is exposed at one end of the power generation element.

また、上記第１および第２実施形態では、正極集電端子および負極集電端子の両方に摩擦低減材としての滑材を設ける例を示したが、本発明はこれに限られない。本発明では、正極集電端子および負極集電端子のいずれか一方だけに摩擦低減材を設けてもよい。   In the first and second embodiments, the example in which the lubricant material as the friction reducing material is provided on both the positive electrode current collecting terminal and the negative electrode current collecting terminal has been described. However, the present invention is not limited to this. In the present invention, a friction reducing material may be provided on only one of the positive electrode current collector terminal and the negative electrode current collector terminal.

また、上記第１および第２実施形態では、本発明の集電端子としての正極集電端子および負極集電端子に摩擦低減材としての滑材を設ける例を示したが、本発明はこれに限られない。本発明では、発電要素の金属箔に摩擦低減材を設けてもよいし、集電端子および発電要素の金属箔の両方に摩擦低減材を設けてもよい。   In the first and second embodiments, the example in which the positive electrode current collector terminal as the current collector terminal and the negative electrode current collector terminal according to the present invention are provided with the lubricant as the friction reducing material has been shown. Not limited. In the present invention, the friction reducing material may be provided on the metal foil of the power generation element, or the friction reducing material may be provided on both the current collecting terminal and the metal foil of the power generation element.

また、上記第１および第２実施形態では、本発明の摩擦低減材の一例として、絶縁性のポリイミドテープからなる滑材を示したが、本発明はこれに限られない。本発明では、発電要素の金属箔と集電端子の接合部分との間の摩擦抵抗を低減可能な摩擦低減材であれば、たとえば、絶縁性のインシュリード（登録商標）や導電性の材料など、ポリイミドテープ以外の材料からなる摩擦低減材であってもよい。また、ポリフェニレンサルファイド（ＰＰＳ）や、ポリエチレン、ポリプロピレン、ポリテトラフルオロエチレン（ＰＴＦＥ）、ポリビニルジフルオライド（ＰＶｄＦ）、これらの樹脂に炭素を混合した導電性樹脂、アセテートフィルム（メンディングテープの樹脂）などからなる摩擦低減材であってもよい。また、本発明の摩擦低減材は、テープ状のものを貼付することにより設ける構成に限らず、液状のものを塗布することにより設ける構成であってもよい。たとえば、上記の絶縁性のインシュリード（登録商標）は塗布により形成される。なお、本発明の電池の製造方法においては、摩擦低減材は、製造工程時（発電要素と集電端子との接合時）に存在すればよく、揮発性の材料や電解液により溶解される材料からなるものなど、電池の完成後には有形的に残存していないものであってもよい。   Moreover, in the said 1st and 2nd embodiment, although the sliding material which consists of an insulating polyimide tape was shown as an example of the friction reducing material of this invention, this invention is not limited to this. In the present invention, if it is a friction reducing material capable of reducing the frictional resistance between the metal foil of the power generation element and the joint portion of the current collecting terminal, for example, insulating Insuled (registered trademark), conductive material, etc. Further, it may be a friction reducing material made of a material other than the polyimide tape. Polyphenylene sulfide (PPS), polyethylene, polypropylene, polytetrafluoroethylene (PTFE), polyvinyl difluoride (PVdF), conductive resin in which carbon is mixed with these resins, acetate film (mending tape resin) It may be a friction reducing material made of, for example. Further, the friction reducing material of the present invention is not limited to a configuration provided by sticking a tape-like material, but may be a configuration provided by applying a liquid material. For example, the insulating insulating lead (registered trademark) is formed by coating. In the battery manufacturing method of the present invention, the friction reducing material may be present during the manufacturing process (when the power generating element and the current collecting terminal are joined), and can be dissolved by a volatile material or an electrolytic solution. The battery may be one that does not remain tangibly after the battery is completed.

また、上記第１および第２実施形態では、本発明の発電要素の一例として、正極と負極とを有する発電要素を示したが、本発明はこれに限られない。本発明では、アルミニウム箔以外の材料を含む正極と銅箔以外の材料を含む負極とを有する発電要素であってもよい。   Moreover, in the said 1st and 2nd embodiment, although the electric power generation element which has a positive electrode and a negative electrode was shown as an example of the electric power generation element of this invention, this invention is not limited to this. In this invention, the electric power generation element which has a positive electrode containing materials other than aluminum foil and a negative electrode containing materials other than copper foil may be sufficient.

また、上記第１および第２実施形態では、本発明の電池を、非水系電解質電池の一種であるリチウムイオン電池に適用する例を示したが、本発明はこれに限られない。本発明の電池を、たとえば、水系電解質電池の一種であるニッケル水素電池やリチウムイオン電池以外の非水系電解質電池に適用してもよい。   Moreover, in the said 1st and 2nd embodiment, although the battery of this invention was shown to the example applied to the lithium ion battery which is 1 type of a non-aqueous electrolyte battery, this invention is not limited to this. The battery of the present invention may be applied to, for example, a non-aqueous electrolyte battery other than a nickel hydride battery or a lithium ion battery, which is a kind of aqueous electrolyte battery.

２、２０２ 発電要素
５、２０５ 正極集電端子（集電端子）
６、２０６ 負極集電端子（集電端子）
７、２０７ 滑材（摩擦低減材）
１００、２００ 電池
２５１ａ、２５１ｂ、２５１ｃ、２５１ｄ、２６１ａ、２６１ｂ、２６１ｃ、２６１ｄ、 接続板部（接合部分）
５１１、６１１ 凹部（接合部分） 2, 202 Power generation element 5, 205 Positive current collecting terminal (current collecting terminal)
6,206 Negative electrode collector terminal (collector terminal)
7,207 Lubricant (friction reducing material)
100, 200 Batteries 251a, 251b, 251c, 251d, 261a, 261b, 261c, 261d, connection plate (joining part)
511, 611 Recess (joint part)

Claims (4)

積層された金属箔を含む発電要素と、
前記発電要素の前記積層された金属箔に対して摺動してから接合される接合部分を含む集電端子と、
前記集電端子の接合部分および前記発電要素の金属箔の少なくとも一方に設けられ、前記発電要素の前記積層された金属箔と前記集電端子の接合部分との間の摩擦抵抗を低減する摩擦低減材とを備えた、電池。 A power generating element including laminated metal foils;
A current collecting terminal including a joining portion to be joined after sliding against the laminated metal foil of the power generation element;
Friction reduction that is provided at at least one of the junction portion of the current collecting terminal and the metal foil of the power generation element and reduces the frictional resistance between the laminated metal foil of the power generation element and the junction portion of the current collection terminal Batteries with materials. 前記積層された金属箔の前記集電端子の接合部分に接合される部分は、略直線状に延びる直線状部であり、
前記集電端子の接合部分は、前記積層された金属箔の前記直線状部に対応するように所定方向に略直線状に延びるように形成されており、
前記摩擦低減材は、前記所定方向に延びるように前記集電端子の接合部分に設けられている、請求項１に記載の電池。 The part to be joined to the joined part of the current collecting terminal of the laminated metal foil is a linear part extending in a substantially linear shape,
The junction part of the current collecting terminal is formed to extend substantially linearly in a predetermined direction so as to correspond to the linear part of the laminated metal foil,
The battery according to claim 1, wherein the friction reducing material is provided at a joint portion of the current collecting terminal so as to extend in the predetermined direction. 前記摩擦低減材は、前記発電要素の金属箔に対する摩擦係数が前記集電端子の接合部分よりも小さい摩擦係数を有する樹脂が貼付または塗布されることにより設けられている、請求項１または２に記載の電池。   The said friction reducing material is provided by sticking or apply | coating resin which has a friction coefficient with a smaller friction coefficient with respect to the metal foil of the said electric power generation element than the junction part of the said current collection terminal. The battery described. 金属箔を積層することにより形成された発電要素の前記金属箔と集電端子の前記発電要素の金属箔に接合される接合部分との間に、前記発電要素の金属箔と前記集電端子の接合部分との間の摩擦抵抗を低減する摩擦低減材が介在された状態で、積層された前記金属箔または前記集電端子の接合部分を摺動させて接合位置まで移動した後、前記集電端子の接合部分と前記発電要素の金属箔とを接合する、電池の製造方法。 Between the metal foil of the power generation element formed by laminating the metal foil and a joint portion of the current collection terminal joined to the metal foil of the power generation element, the metal foil of the power generation element and the current collection terminal In a state where a friction reducing material for reducing frictional resistance with the joint portion is interposed, the laminated metal foil or the joint portion of the current collecting terminal is slid and moved to the joint position, and then the current collector is moved. A method for manufacturing a battery, comprising joining a joining portion of a terminal and a metal foil of the power generation element.
JP2011052525A 2011-03-10 2011-03-10 Battery and battery manufacturing method Active JP5578118B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2011052525A JP5578118B2 (en) 2011-03-10 2011-03-10 Battery and battery manufacturing method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2011052525A JP5578118B2 (en) 2011-03-10 2011-03-10 Battery and battery manufacturing method

Publications (2)

Publication Number Publication Date
JP2012190636A JP2012190636A (en) 2012-10-04
JP5578118B2 true JP5578118B2 (en) 2014-08-27

Family

ID=47083600

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2011052525A Active JP5578118B2 (en) 2011-03-10 2011-03-10 Battery and battery manufacturing method

Country Status (1)

Country Link
JP (1) JP5578118B2 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6171395B2 (en) * 2013-02-26 2017-08-02 株式会社Ｇｓユアサ Power storage device and method for manufacturing power storage device
JP6155896B2 (en) * 2013-06-21 2017-07-05 株式会社Ｇｓユアサ Storage element and method for manufacturing the same
US10644293B2 (en) 2016-04-25 2020-05-05 Gs Yuasa International Ltd. Energy storage device
JP6788821B2 (en) * 2016-05-31 2020-11-25 株式会社Ｇｓユアサ Power storage element, power storage device, and manufacturing method of power storage element
KR20200134252A (en) * 2018-03-20 2020-12-01 인디언 스페이스 리서치 오거너제이션 Hermetically sealed lithium-ion cell and its manufacturing method
JP7252926B2 (en) 2020-09-17 2023-04-05 プライムプラネットエナジー＆ソリューションズ株式会社 SECONDARY BATTERY TERMINAL AND SECONDARY BATTERY INCLUDING THE TERMINAL

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000331706A (en) * 1999-05-19 2000-11-30 Toshiba Battery Co Ltd Guide jig for inserting group of electrodes and, manufacture of rectangular alkaline secondary battery using the same
JP3888434B2 (en) * 2001-12-21 2007-03-07 株式会社ジーエス・ユアサコーポレーション Battery manufacturing method
JP4661257B2 (en) * 2005-02-17 2011-03-30 トヨタ自動車株式会社 Current collecting terminal and power storage device including the terminal
JP5100281B2 (en) * 2007-06-27 2012-12-19 三洋電機株式会社 Sealed battery and manufacturing method thereof

Also Published As

Publication number Publication date
JP2012190636A (en) 2012-10-04

Similar Documents

Publication Publication Date Title
JP4553751B2 (en) Square type secondary battery
KR101818631B1 (en) Battery and method of manufacturing same
JP5326125B2 (en) Nonaqueous electrolyte secondary battery
US8530068B2 (en) Square battery and manufacturing method of the same
JP5578118B2 (en) Battery and battery manufacturing method
KR102568341B1 (en) Energy storage device
JP5841571B2 (en) Secondary battery
CN105009326B (en) Charge storage element
JPWO2013111256A1 (en) Secondary battery
JP2017069207A (en) Lithium ion secondary battery and manufacturing method for the same
JP5122617B2 (en) Rectangular secondary battery and method for manufacturing the same
JP2019061779A (en) Power storage device and power storage method
KR20160004825A (en) Secondary battery, manufacturing apparatus for the same and manufacturing method for the same
JP2013045636A (en) Square battery and manufacturing method therefor
US20230015845A1 (en) Terminal component and method for manufacturing the same
JP2017079139A (en) Sealed battery
JP6089832B2 (en) Electricity storage element
WO2018012465A1 (en) Power storage element and power storage element production method
JP6507638B2 (en) Storage element
JP2013073768A (en) Power storage device
WO2018235768A1 (en) Power storage element
JP7331573B2 (en) Storage element
WO2023037763A1 (en) Battery manufacturing method and battery
JP2013054914A (en) Power storage element
JP7259261B2 (en) Storage element

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20130801

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20140324

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20140401

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20140515

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20140610

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20140623

R150 Certificate of patent or registration of utility model

Ref document number: 5578118

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150