JP5304121B2 - Battery and manufacturing method thereof - Google Patents

Battery and manufacturing method thereof Download PDF

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JP5304121B2
JP5304121B2 JP2008232453A JP2008232453A JP5304121B2 JP 5304121 B2 JP5304121 B2 JP 5304121B2 JP 2008232453 A JP2008232453 A JP 2008232453A JP 2008232453 A JP2008232453 A JP 2008232453A JP 5304121 B2 JP5304121 B2 JP 5304121B2
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sheet
winding
current collecting
wound
collecting lead
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JP2010067456A (en
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鈴木　　勲
稔 平田
智匡 望月
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GS Yuasa International Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Abstract

<P>PROBLEM TO BE SOLVED: To provide a battery facilitating the positioning of a current collecting lead 3 by placing the current collecting lead 3 along the end side of the winding end 2c inside of a resin sheet 2a and fastening it, and to provide a method for manufacturing the battery. <P>SOLUTION: In the battery using a wound power generation element formed by winding a positive electrode and a negative electrode through a separator around a winding sheet 2 formed by cylindrically winding the square resin sheet 2a and fastening the end, the current collecting lead 3 in which a base part 3a is arranged inside the cylinder of the winding sheet 2 and a projecting part 3b projected from the cylinder is connected to the electrode of the power generation element is fastened to the winding sheet 2 after the side end of the base part 3b is placed along the end side of the winding end 2c inside the resin sheet 2a in the winding sheet 2. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

本発明は、シートを筒状に巻いた巻きシートに正極と負極をセパレータを介して巻回した巻回型の発電要素を用いた電池及びその製造方法に関するものである。   The present invention relates to a battery using a wound type power generating element in which a positive electrode and a negative electrode are wound through a separator on a wound sheet obtained by winding a sheet in a cylindrical shape, and a method for manufacturing the same.

巻回型の発電要素は、巻回機の回転する巻回軸に正極と負極をセパレータを介して巻き付けることにより製造する。ただし、巻回機の巻回軸に直接セパレータと正極や負極を巻き付けたのでは、この巻回軸にセパレータと正極や負極が強いテンションで固く巻き付くので、巻回軸との間の摩擦力が強くなりすぎて、巻回後に発電要素を巻回軸から引き抜くことが困難になる。このため巻回機の巻回軸には樹脂成形品等からなる巻き芯を取り付け、この巻き芯にセパレータと正極や負極を巻き付けることにより、発電要素を巻き芯と共に巻回軸から容易に取り外せるようにする場合があった。しかし、巻き芯は、発電要素の中心部のスペースを無駄に占有するので、電池の容積エネルギー密度を低下させることになる。   A winding type power generation element is manufactured by winding a positive electrode and a negative electrode through a separator around a rotating shaft of a winding machine. However, if the separator, the positive electrode, and the negative electrode are wound directly around the winding shaft of the winding machine, the separator, the positive electrode, and the negative electrode are tightly wound around the winding shaft with a strong tension. Becomes too strong, and it becomes difficult to pull out the power generation element from the winding shaft after winding. For this reason, a winding core made of a resin molded product or the like is attached to the winding shaft of the winding machine, and the power generation element can be easily removed from the winding shaft together with the winding core by winding the separator, the positive electrode, and the negative electrode around the winding core. There was a case. However, the winding core unnecessarily occupies the space at the center of the power generation element, thereby reducing the volumetric energy density of the battery.

そこで、摩擦係数が比較的小さいポリプロピレン（ＰＰ）やポリフェニレンサルファイド（ＰＰＳ）等の樹脂シートを筒状に巻いた巻きシートを巻回機の巻回軸に嵌め付けておき、この巻きシートの周囲にセパレータと正極や負極を巻き付けることにより、発電要素を巻きシートと共に巻回軸から容易に引き抜くことができるようにする場合も多い。   Therefore, a winding sheet in which a resin sheet such as polypropylene (PP) or polyphenylene sulfide (PPS) having a relatively small friction coefficient is wound into a cylindrical shape is fitted to the winding shaft of the winding machine, and the winding sheet is placed around the winding sheet. In many cases, by winding the separator, the positive electrode, and the negative electrode, the power generating element can be easily pulled out from the winding shaft together with the winding sheet.

また、上記のような巻きシートを用いる発電要素では、図３に示すように、長円筒形の発電要素１における巻きシート２の筒状の内部に、予め両端側から方形薄板状の集電リード３、３の基部３ａ、３ａを挿入して止め付けておき、この集電リード３の筒状から突出した突出部３ｂ、３ｂを発電要素１の電極１ａ、１ｂに超音波溶接により接続したものがあった（例えば、特許文献１参照。）。図３に示す電池では、発電要素１が上下のアルミラミネートケース４、４に収納されるので、集電リード３、３における突出部３ｂ、３ｂよりもさらに突出した先端部３ｃ、３ｃがアルミラミネートケース４、４の間からさらに外部にそれぞれ突出して正負の端子となる。   Further, in the power generation element using the winding sheet as described above, as shown in FIG. 3, a rectangular thin plate-like current collecting lead is provided in advance from both ends in the cylindrical inside of the wound sheet 2 in the long cylindrical power generation element 1. 3 and 3 base portions 3a and 3a are inserted and fixed, and the protruding portions 3b and 3b protruding from the cylindrical shape of the current collecting lead 3 are connected to the electrodes 1a and 1b of the power generating element 1 by ultrasonic welding. (For example, see Patent Document 1). In the battery shown in FIG. 3, since the power generating element 1 is housed in the upper and lower aluminum laminate cases 4 and 4, the tip portions 3c and 3c of the current collecting leads 3 and 3 that protrude further than the protrusions 3b and 3b are aluminum laminate. Each of the cases 4 and 4 protrudes further to the outside to become a positive / negative terminal.

ところが、従来は、図４に示すように、集電リード３、３の基部３ａ、３ａを巻きシート２の両端側（図４では上下側）から筒状の内側に挿入し、特に位置決めを行うことなく、各基部３ａ、３ａを粘着テープ５、５で巻きシート２の筒状の内面に貼り付けていた。このため、図４の上方の集電リード３の矢印Ａに示すように、この集電リード３が傾斜して配置されたまま作業者がうっかり粘着テープ５で貼り付けたり、発電要素１の巻回後に集電リード３の突出部３ｂを電極に超音波溶接する際の振動により集電リード３が傾斜することがあった。そして、集電リード３がこのように巻きシート２の軸線方向に対して傾斜すると、図３に示すような電池の場合には、アルミラミネートケース４、４の間から突出する集電リード３の先端部３ｃの端子の位置がずれるので、電池と外部回路との接続に不都合が生じるおそれがある。また、この集電リード３が電池内部で端子から引き出された接続部と接続されるような場合にも、この接続部との接続作業に不都合が生じるおそれがあるという問題があった。また、図５に示すように、巻きシート２の両端側に正極用と負極用の集電リード３、３をそれぞれ貼り付ける場合、これら正極用と負極用の集電リード３、３が矢印Ｂに示すように軸線方向に直交する方向に位置ずれし、同様の不都合が生じるおそれがあるという問題もあった。
特開２００４−１７８８６２号公報 However, conventionally, as shown in FIG. 4, the base portions 3a and 3a of the current collecting leads 3 and 3 are inserted into the cylindrical inside from both ends (upper and lower sides in FIG. 4) of the wound sheet 2, and positioning is particularly performed. Without sticking, each base part 3a, 3a was affixed on the cylindrical inner surface of the winding sheet 2 with the adhesive tapes 5 and 5. FIG. For this reason, as indicated by an arrow A of the current collecting lead 3 in the upper part of FIG. 4, an operator inadvertently attaches the current collecting lead 3 with the adhesive tape 5 while the current collecting lead 3 is disposed at an inclination, or winds the power generating element 1. In some cases, the current collecting lead 3 may be inclined due to vibration when the protruding portion 3b of the current collecting lead 3 is ultrasonically welded to the electrode after the rotation. When the current collecting lead 3 is inclined with respect to the axial direction of the wound sheet 2 in this way, in the case of a battery as shown in FIG. 3, the current collecting lead 3 protruding from between the aluminum laminate cases 4 and 4 Since the position of the terminal of the tip 3c is shifted, there is a possibility that inconvenience may arise in the connection between the battery and the external circuit. In addition, even when the current collecting lead 3 is connected to a connection part drawn from the terminal inside the battery, there is a problem that there is a possibility that inconvenience may occur in the connection work with the connection part. As shown in FIG. 5, when the positive and negative current collecting leads 3 and 3 are attached to both ends of the wound sheet 2, the positive and negative current collecting leads 3 and 3 are indicated by an arrow B. As shown in FIG. 4, there is a problem that the position is shifted in a direction orthogonal to the axial direction, and the same inconvenience may occur.
JP 2004-178862 A

本発明は、巻きシートのシートの巻き端の端辺に集電リードを沿わせて止め付けることにより、この集電リードの位置決めを容易にすることができる電池及びその製造方法を提供しようとするものである。   The present invention intends to provide a battery capable of facilitating positioning of the current collecting lead by fastening the current collecting lead along the edge of the winding end of the sheet of the wound sheet, and a method for manufacturing the same. Is.

請求項１の電池は、シートを筒状に巻いて端部を止め付けた巻きシートに、正極と負極をセパレータを介して巻回した巻回型の発電要素を用いた電池において、前記巻きシートの筒状の内側又は外側に基部を配置し、この筒状から突出した突出部を発電要素の正極又は負極に接続した集電リードが、基部の側端辺を巻きシートにおけるシートの巻き端の端辺に沿わせて、この巻きシートに止め付けられていることを特徴とする。   The battery according to claim 1 is a battery using a wound type power generating element in which a sheet is wound into a cylindrical shape and an end portion is fixed, and a positive electrode and a negative electrode are wound through a separator. A current collecting lead in which a base portion is arranged inside or outside of the cylindrical shape, and a protruding portion protruding from the cylindrical shape is connected to the positive electrode or the negative electrode of the power generation element, the side edge of the base portion is the winding end of the sheet in the wound sheet. It is characterized by being fixed to this winding sheet along the edge.

請求項２の電池の製造方法は、シートを筒状に巻いた巻きシートの筒状の内側又は外側に集電リードの基部を配置すると共に、この基部の側端辺を巻きシートにおけるシートの巻き端の端辺に沿わせて、集電リードを巻きシートに止め付ける工程と、前記巻きシートに正極と負極をセパレータを介して巻回し巻回型の発電要素を作製する工程と、前記巻きシートの筒状から突出した集電リードの突出部を発電要素の正極又は負極に接続する工程とを備えたことを特徴とする。   In the battery manufacturing method according to claim 2, the base portion of the current collecting lead is disposed inside or outside the cylindrical shape of the wound sheet obtained by winding the sheet in a cylindrical shape, and the side edge of the base portion is wound around the sheet in the wound sheet. A step of fastening a current collecting lead to a winding sheet along the edge of the end, a step of winding a positive electrode and a negative electrode on the winding sheet via a separator, and a winding type power generation element; and the winding sheet And a step of connecting the protruding portion of the current collecting lead protruding from the cylindrical shape to the positive electrode or the negative electrode of the power generation element.

請求項３の電池の製造方法は、シートの一方の端辺に集電リードの基部の側端辺を沿わせてこの集電リードをシートに止め付ける工程と、前記シートを、集電リードを沿わせた端辺が巻き端となるように筒状に巻いて端部を止め付けることにより巻きシートを作製する工程と、前記巻きシートに正極と負極をセパレータを介して巻回し巻回型の発電要素を作製する工程と、前記巻きシートの筒状から突出した集電リードの突出部を発電要素の正極又は負極に接続する工程とを備えたことを特徴とする。   According to a third aspect of the present invention, there is provided a battery manufacturing method comprising: a step of fixing the current collecting lead to the sheet along a side edge of the base of the current collecting lead along one edge of the sheet; A step of producing a wound sheet by winding it in a cylindrical shape so that the aligned end side becomes a wound end, and winding a positive electrode and a negative electrode through a separator on the wound sheet The method includes a step of producing a power generation element, and a step of connecting a protruding portion of the current collecting lead protruding from the cylindrical shape of the wound sheet to a positive electrode or a negative electrode of the power generation element.

請求項１の発明によれば、巻きシートのシートの巻き端の端辺に、集電リードの側端辺を沿わせるので、この集電リードの止め付け作業の際の位置決めが容易となり、集電リードを所定の角度で止め付けることができる。また、巻きシートのシートが方形であれば、このシートの巻き端の端辺は巻きシートの軸線方向に沿うことになり、集電リードの側端辺もこの軸線方向に沿うことになるので、集電リードが軸線方向に対して傾斜して止め付けられるのを防ぐことができる。   According to the first aspect of the present invention, the side edge of the current collecting lead is aligned with the edge of the winding end of the sheet of the wound sheet. The electric lead can be fixed at a predetermined angle. Also, if the sheet of the wound sheet is square, the edge of the winding end of this sheet will be along the axial direction of the wound sheet, and the side edge of the current collecting lead will also be along this axial direction, It is possible to prevent the current collecting lead from being inclined and stopped with respect to the axial direction.

さらに、巻きシートの筒状の両端部にそれぞれ正極用と負極用の集電リードの基部を配置する場合、これらの集電リードの基部の側端辺をシートの同じ巻き端の端辺に沿わせて止め付ければ、これら正極用と負極用の集電リードの間の位置関係がずれるのを防ぐこともできる。特に、巻きシートのシートが方形である場合には、これら正極用と負極用の集電リードを巻きシートの軸線方向に沿った同一直線上に配置することができる。   Further, when the base portions of the current collecting leads for the positive electrode and the negative electrode are respectively arranged at both cylindrical end portions of the wound sheet, the side edges of the base portions of these current collecting leads are aligned with the edges of the same winding end of the sheet. Accordingly, it is possible to prevent the positional relationship between the positive electrode and negative electrode current collecting leads from deviating. In particular, when the sheet of the wound sheet is square, the positive electrode and negative electrode current collecting leads can be arranged on the same straight line along the axial direction of the wound sheet.

しかも、集電リードの側端辺をシートの巻き端の端辺と向かい合わせになるように沿わせれば、集電リードがシートの端辺側への移動を制限されるので、電極との接続作業の際に、振動等により位置がずれるのを防ぐことができる。また、このようにシートの端辺と向かい合わせに沿わせれば、集電リードの側端辺を目測だけで沿わせるのではなく、シートの端辺に実際に突き合わせて沿わすことができるので、集電リードの止め付け作業が容易となる。   Moreover, if the current collecting lead is placed so that the side edge faces the edge of the winding end of the sheet, movement of the current collecting lead to the edge side of the sheet is restricted, so connection with the electrode It is possible to prevent the position from being shifted due to vibration or the like during work. In addition, if it is along the edge of the sheet in this way, the side edge of the current collecting lead can be actually abutted against the edge of the sheet, not just along the side, The current collector lead can be easily fixed.

請求項２の発明によれば、巻きシートのシートの巻き端の端辺に、集電リードの側端辺を沿わせるので、この集電リードの止め付け作業の際の位置決めが容易となり、集電リードを所定の角度で止め付けることができる。また、巻きシートのシートが方形であれば、このシートの巻き端の端辺は巻きシートの軸線方向に沿うことになり、集電リードの側端辺もこの軸線方向に沿うことになるので、集電リードが軸線方向に対して傾斜して止め付けられるのを防ぐことができる。   According to the invention of claim 2, since the side end side of the current collecting lead is placed along the edge of the winding end of the sheet of the wound sheet, positioning at the time of fixing the current collecting lead is facilitated. The electric lead can be fixed at a predetermined angle. Also, if the sheet of the wound sheet is square, the edge of the winding end of this sheet will be along the axial direction of the wound sheet, and the side edge of the current collecting lead will also be along this axial direction, It is possible to prevent the current collecting lead from being inclined and stopped with respect to the axial direction.

さらに、巻きシートの筒状の両端部にそれぞれ正極用と負極用の集電リードの基部を配置する場合、これらの集電リードの基部の側端辺をシートの同じ巻き端の端辺に沿わせて止め付ければ、これら正極用と負極用の集電リードの間の位置関係がずれるのを防ぐこともできる。特に、巻きシートのシートが方形である場合には、これら正極用と負極用の集電リードを巻きシートの軸線方向に沿った同一直線上に配置することができる。   Further, when the base portions of the current collecting leads for the positive electrode and the negative electrode are respectively arranged at both cylindrical end portions of the wound sheet, the side edges of the base portions of these current collecting leads are aligned with the edges of the same winding end of the sheet. Accordingly, it is possible to prevent the positional relationship between the positive electrode and negative electrode current collecting leads from deviating. In particular, when the sheet of the wound sheet is square, the positive electrode and negative electrode current collecting leads can be arranged on the same straight line along the axial direction of the wound sheet.

しかも、集電リードの側端辺をシートの巻き端の端辺と向かい合わせになるように沿わせれば、集電リードがシートの端辺側への移動を制限されるので、電極との接続作業の際に、振動等により位置がずれるのを防ぐことができる。また、このようにシートの端辺と向かい合わせに沿わせれば、集電リードの側端辺を目測だけで沿わせるのではなく、シートの端辺に実際に突き合わせて沿わすことができるので、集電リードの止め付け作業が容易となる。   Moreover, if the current collecting lead is placed so that the side edge faces the edge of the winding end of the sheet, movement of the current collecting lead to the edge side of the sheet is restricted, so connection with the electrode It is possible to prevent the position from being shifted due to vibration or the like during work. In addition, if it is along the edge of the sheet in this way, the side edge of the current collecting lead can be actually abutted against the edge of the sheet, not just along the side, The current collector lead can be easily fixed.

請求項３の発明によれば、巻きシートの作製後にシートの巻き端となる端辺に、集電リードの側端辺を沿わせるので、この集電リードの止め付け作業の際の位置決めが容易となり、集電リードを所定の角度で止め付けることができる。また、巻きシートのシートが方形であれば、このシートの巻き端の端辺は巻きシートの軸線方向に沿うことになり、集電リードの側端辺もこの軸線方向に沿うことになるので、集電リードが軸線方向に対して傾斜して止め付けられるのを防ぐことができる。   According to the invention of claim 3, since the side end side of the current collecting lead is placed along the end side which becomes the winding end of the sheet after the winding sheet is manufactured, positioning at the time of fixing the current collecting lead is easy. Thus, the current collecting lead can be fixed at a predetermined angle. Also, if the sheet of the wound sheet is square, the edge of the winding end of this sheet will be along the axial direction of the wound sheet, and the side edge of the current collecting lead will also be along this axial direction, It is possible to prevent the current collecting lead from being inclined and stopped with respect to the axial direction.

さらに、巻きシートの筒状の両端部にそれぞれ正極用と負極用の集電リードの基部を配置する場合、これらの集電リードの基部の側端辺をシートの同じ巻き端となる端辺に沿わせて止め付ければ、これら正極用と負極用の集電リードの間の位置関係がずれるのを防ぐこともできる。特に、巻きシートのシートが方形である場合には、これら正極用と負極用の集電リードを巻きシートの軸線方向に沿った同一直線上に配置することができる。   Further, when the bases of the current collecting leads for the positive electrode and the negative electrode are respectively arranged at both cylindrical ends of the wound sheet, the side edges of the bases of these current collecting leads are set to the edges that are the same winding edge of the sheet. If it stops along, it can also prevent that the positional relationship between these current collection leads for positive electrodes and negative electrodes is shifted. In particular, when the sheet of the wound sheet is square, the positive electrode and negative electrode current collecting leads can be arranged on the same straight line along the axial direction of the wound sheet.

しかも、集電リードの側端辺をシートの巻き端となる端辺と向かい合わせになるように沿わせれば、集電リードがシートの端辺側への移動を制限されるので、電極との接続作業の際に、振動等により位置がずれるのを防ぐことができる。また、このようにシートの端辺と向かい合わせに沿わせれば、集電リードの側端辺を目測だけで沿わせるのではなく、シートの端辺に実際に突き合わせて沿わすことができるので、集電リードの止め付け作業が容易となる。   In addition, if the side edge of the current collecting lead is placed so as to face the edge that becomes the winding end of the sheet, the movement of the current collecting lead to the edge side of the sheet is restricted. It is possible to prevent the position from being shifted due to vibration or the like during the connection work. In addition, if it is along the edge of the sheet in this way, the side edge of the current collecting lead can be actually abutted against the edge of the sheet, not just along the side, The current collector lead can be easily fixed.

以下、本発明の最良の実施形態について図１〜図２を参照して説明する。なお、これらの図においても、図３〜図５に示した従来例と同様の機能を有する構成部材には同じ番号を付記する。   Hereinafter, the best embodiment of the present invention will be described with reference to FIGS. In these drawings, the same reference numerals are given to constituent members having the same functions as those of the conventional example shown in FIGS.

本実施形態は、図３に示したものと同様の構成の非水電解質二次電池について説明する。図１に示すように、この非水電解質二次電池の発電要素に用いられる巻きシート２は、方形の樹脂シート２ａを筒状に巻いて端部を粘着テープ６で貼り付けることにより作製される。樹脂シート２ａは、ポリプロピレン（ＰＰ）やポリフェニレンサルファイド（ＰＰＳ）等の比較的摩擦係数が小さい合成樹脂のシート材（フィルム材）が用いられる。ただし、発電要素のセパレータよりも十分に摩擦係数が小さい合成樹脂のシート材であれば、樹脂シート２ａの素材は特に限定されない。   In the present embodiment, a non-aqueous electrolyte secondary battery having the same configuration as that shown in FIG. 3 will be described. As shown in FIG. 1, the wound sheet 2 used for the power generation element of the nonaqueous electrolyte secondary battery is produced by winding a rectangular resin sheet 2 a in a cylindrical shape and attaching the end portion with an adhesive tape 6. . As the resin sheet 2a, a synthetic resin sheet material (film material) having a relatively small friction coefficient such as polypropylene (PP) or polyphenylene sulfide (PPS) is used. However, the material of the resin sheet 2a is not particularly limited as long as it is a synthetic resin sheet material having a sufficiently smaller friction coefficient than the separator of the power generation element.

上記樹脂シート２ａは、方形に裁断されたものを筒状に１回転を超えて巻かれる。そして、ここでは１回転を少し超えた程度に巻いた外側の巻き端２ｂを粘着テープ６で止め付けることにより巻きシート２となる。なお、粘着テープ６は、樹脂シート２ａの外側の巻き端２ｂに限らず、内側の巻き端２ｃを筒状の内側で止め付けるようにしてもよいが、この場合、巻き癖のない樹脂シート２ａを巻くと、外側の巻き端２ｂがさらに外にはね上がるおそれがある。また、樹脂シート２ａの端部の止め付け方は、このような粘着テープ６に限らず、他の接着剤や粘着剤、止め付け部材等を用いてもよく、樹脂シート２ａが巻かれて重なり合った端部同士を熱融着等により接合してもよい。   The resin sheet 2a is wound more than one turn into a cylindrical shape cut into a square. And here, it becomes the winding sheet 2 by stopping the outer winding end 2b wound to a degree slightly exceeding one rotation with the adhesive tape 6. The adhesive tape 6 is not limited to the outer winding end 2b of the resin sheet 2a, but the inner winding end 2c may be fastened on the inner side of the tube, but in this case, the resin sheet 2a without curl , There is a risk that the outer winding end 2b may further spring up. Further, the method of fastening the end of the resin sheet 2a is not limited to such an adhesive tape 6, and other adhesives, adhesives, fastening members, etc. may be used, and the resin sheet 2a is wound and overlapped. The ends may be joined together by heat fusion or the like.

上記巻きシート２の筒状の内側には、両端側（図１の上下の開口端側）から正極用と負極用の集電リード３、３の基部３ａ、３ａが挿入される。上方の開口端側から挿入する正極用の集電リード３は、上下に長い方形のアルミニウム製の薄板であり、下端部が基部３ａとなる。また、下方の開口端側から挿入する負極用の集電リード３は、上下に長い方形の銅製の薄板であり、上端部が基部３ａとなる。   The base portions 3a and 3a of the current collecting leads 3 and 3 for the positive electrode and the negative electrode are inserted into the cylindrical inner side of the wound sheet 2 from both end sides (upper and lower opening end sides in FIG. 1). The positive electrode current collecting lead 3 to be inserted from the upper opening end side is a rectangular aluminum thin plate that is long in the vertical direction, and the lower end portion serves as a base portion 3a. Further, the negative electrode current collecting lead 3 inserted from the lower opening end side is a rectangular copper thin plate that is long in the vertical direction, and the upper end portion serves as a base portion 3a.

上記正極用の集電リード３は、基部３ａよりも上方であって巻きシート２の筒状から突出した突出部３ｂが後に発電要素の正極と接続され、この突出部３ｂよりもさらに上方に突出した先端部３ｃが正極端子となる。また、上記負極用の集電リード３は、基部３ａよりも下方であって巻きシート２の筒状から突出した突出部３ｂが後に発電要素の負極と接続され、この突出部３ｂよりもさらに下方に突出した先端部３ｃが負極端子となる。さらに、これら正極用と負極用の集電リード３、３における突出部３ｂ、３ｂと先端部３ｃ、３ｃの間には、それぞれタブフィルム７、７が熱溶着により貼り付けられている。タブフィルム７、７は、アルミラミネートケースの間から引き出される集電リード３、３の密閉封止を確実にするための樹脂フィルムである。   In the positive electrode current collecting lead 3, a protruding portion 3 b protruding above the base portion 3 a and protruding from the cylindrical shape of the wound sheet 2 is connected to the positive electrode of the power generation element later and protrudes further upward than the protruding portion 3 b. The tip portion 3c thus made serves as a positive electrode terminal. Further, the negative electrode current collecting lead 3 is lower than the base portion 3a, and a protruding portion 3b protruding from the cylindrical shape of the wound sheet 2 is connected to the negative electrode of the power generating element later, and further below the protruding portion 3b. The tip portion 3c protruding in the direction becomes a negative electrode terminal. Further, tab films 7 and 7 are bonded by thermal welding between the protruding portions 3b and 3b and the tip portions 3c and 3c of the positive and negative current collecting leads 3 and 3, respectively. The tab films 7 and 7 are resin films for ensuring the hermetic sealing of the current collecting leads 3 and 3 drawn out between the aluminum laminate cases.

上記集電リード３、３の基部３ａ、３ａは、図１に示す右側を向く側端辺を、巻きシート２における樹脂シート２ａの内側の巻き端２ｃの端辺（図１では左側を向く端辺）に向かい合わせに沿わせて配置される。即ち、例えば、集電リード３、３の基部３ａ、３ａの図１における手前側表面を、図１に示す集電リード３、３の位置より少し左側に寄った樹脂シート２ａの内周面に押し当てながら右側に摺動させ、これらの基部３ａ、３ａの側端辺のほぼ全体を樹脂シート２ａの内側の巻き端２ｃの端辺に当接させる。この際、基部３ａ、３ａの側端辺は、全体が樹脂シート２ａの内側の巻き端２ｃの端辺に完全に当接するのが理想であるが、少なくとも一部が当接するか極めて接近していて、全体的にもある程度近接していれば足りる。   The bases 3a and 3a of the current collecting leads 3 and 3 have side edges that face the right side shown in FIG. 1 and end edges of the winding edge 2c on the inner side of the resin sheet 2a in the winding sheet 2 (ends that face the left side in FIG. 1). It is arranged along the side. That is, for example, the front side surface in FIG. 1 of the base portions 3a and 3a of the current collecting leads 3 and 3 is placed on the inner peripheral surface of the resin sheet 2a slightly closer to the left side than the position of the current collecting leads 3 and 3 shown in FIG. While being pressed, it is slid to the right side, and substantially the entire side end sides of these base portions 3a, 3a are brought into contact with the end side of the winding end 2c inside the resin sheet 2a. At this time, it is ideal that the side edges of the base portions 3a and 3a are completely in contact with the end edge of the winding end 2c on the inner side of the resin sheet 2a, but at least a part of them is in contact or very close. Therefore, it is sufficient if it is close to some extent as a whole.

上記のようにして集電リード３、３の基部３ａ、３ａの側端辺が樹脂シート２ａの内側の巻き端２ｃの端辺に向かい合わせに沿わせて配置されると、それぞれ粘着テープ５、５で樹脂シート２ａの内周面に貼り付ける。なお、集電リード３、３の基部３ａ、３ａの止め付ける方は、このような粘着テープ５、５に限らず、他の接着剤や粘着剤、止め付け部材等を用いてもよく、基部３ａ、３ａを加熱することにより樹脂シート２ａの内周面に熱溶着により接合してもよい。また、集電リード３、３の基部３ａ、３ａの図１における手前側表面に両面粘着テープを貼っておき、これを樹脂シート２ａの内周面に粘着させることもできるが、この場合は、基部３ａ、３ａを樹脂シート２ａの内周面に押し当てながら右側に摺動させることができないので、例えば先に基部３ａ、３ａの側端辺だけを樹脂シート２ａの内側の巻き端２ｃの端辺に当接させた状態で、基部３ａ、３ａの手前側表面の全体を樹脂シート２ａの内周面に押し当てるようにして止め付ければよい。   When the side edges of the base portions 3a and 3a of the current collecting leads 3 and 3 are arranged so as to face the edge of the winding end 2c inside the resin sheet 2a as described above, the adhesive tape 5 and 5 is affixed on the inner peripheral surface of the resin sheet 2a. Note that the method of fastening the base portions 3a and 3a of the current collecting leads 3 and 3 is not limited to the adhesive tapes 5 and 5, and other adhesives, adhesives, fastening members, and the like may be used. You may join by heat welding to the internal peripheral surface of the resin sheet 2a by heating 3a, 3a. Also, a double-sided adhesive tape can be applied to the front side surface of the bases 3a and 3a of the current collecting leads 3 and 3 in FIG. 1, and this can be adhered to the inner peripheral surface of the resin sheet 2a. Since the base portions 3a and 3a cannot be slid to the right side while being pressed against the inner peripheral surface of the resin sheet 2a, for example, only the side edges of the base portions 3a and 3a are first connected to the end of the winding end 2c inside the resin sheet 2a. The entire front side surface of the bases 3a and 3a may be pressed against the inner peripheral surface of the resin sheet 2a while being in contact with the sides.

上記集電リード３、３を止め付けた巻きシート２は、巻回機の巻回軸に嵌め付けられる。図３に示したような長円筒形の発電要素１を作製するための巻回機の巻回軸は、２枚の金属製の平板を少し間隔を開けて配置したものであり、これら２枚の平板の間隔を狭めた状態で周囲に巻きシート２を外嵌し、２枚の平板の間隔を広げることによりテンションをかけて嵌め付ける。そして、この巻回軸を回転させることにより、巻きシート２の周囲に帯状の正極と負極をセパレータを介して長円筒形に巻き付けて発電要素１を製造する。   The wound sheet 2 to which the current collecting leads 3 and 3 are fastened is fitted on the winding shaft of the winding machine. The winding shaft of the winding machine for producing the long cylindrical power generating element 1 as shown in FIG. 3 is a structure in which two metal flat plates are arranged with a little space between them. The wound sheet 2 is externally fitted around the plate in a state in which the interval between the flat plates is narrowed, and is fitted with tension by widening the interval between the two flat plates. Then, by rotating this winding shaft, the power generating element 1 is manufactured by winding a belt-like positive electrode and a negative electrode around the wound sheet 2 in a long cylindrical shape via a separator.

巻回機によって発電要素１が作製されると、巻回軸の２枚の平板の間隔を再び狭めて、この巻回軸から発電要素１を巻きシート２と共に引き抜いて取り出す。この際、巻きシート２の摩擦係数が比較的小さいので、巻回軸の２枚の金属製の平板から発電要素１を巻きシート２と共に容易に引き抜くことができる。   When the power generation element 1 is produced by the winding machine, the distance between the two flat plates of the winding shaft is narrowed again, and the power generation element 1 is pulled out from the winding shaft together with the winding sheet 2 and taken out. At this time, since the friction coefficient of the wound sheet 2 is relatively small, the power generating element 1 can be easily pulled out together with the wound sheet 2 from the two metal flat plates of the winding shaft.

上記発電要素１は、図３に示したように、長円筒形の両方の端部から正極の集電基材であるアルミニウム箔の電極１ａと、負極の集電基材である銅箔の電極１ｂが突出している。また、この長円筒形の発電要素１の巻回の中心の巻きシート２の両開口端からは、正極用と負極用の集電リード３、３の突出部３ｂ、３ｂや先端部３ｃ、３ｃが突出している。そして、正極用の集電リード３の突出部３ｂ、３ｂは、発電要素１の一方の端部に突出するアルミニウム箔の電極１ａと重ね合わせて超音波溶接により接続され、負極用の集電リード３の突出部３ｂ、３ｂは、発電要素１の他方の端部に突出する銅箔の電極１ｂと重ね合わせて超音波溶接により接続される。   As shown in FIG. 3, the power generation element 1 includes an aluminum foil electrode 1 a that is a positive current collecting base and a copper foil electrode that is a negative current collecting base from both ends of a long cylindrical shape. 1b protrudes. Further, from both open ends of the winding sheet 2 at the center of winding of the long cylindrical power generating element 1, the protruding portions 3b and 3b and the tip portions 3c and 3c of the positive and negative current collecting leads 3 and 3 are provided. Is protruding. Then, the protruding portions 3b and 3b of the current collecting lead 3 for the positive electrode are overlapped with the aluminum foil electrode 1a protruding at one end portion of the power generating element 1 and connected by ultrasonic welding, and the current collecting lead for the negative electrode The three protruding portions 3b and 3b are overlapped with the copper foil electrode 1b protruding at the other end of the power generating element 1 and connected by ultrasonic welding.

上記発電要素１は、上下からアルミラミネートケース４、４に覆われて、周囲を熱溶着により封止されることにより内部に収納される。そして、これらのアルミラミネートケース４、４の間からは、集電リード３、３先端部３ｃ、３ｃが突出して正負の端子となる。また、これらのアルミラミネートケース４、４の間に挟まれた集電リード３、３は、タブフィルム７、７によって金属と樹脂との界面が確実に封止される。   The power generating element 1 is covered with aluminum laminate cases 4 and 4 from above and below, and the periphery is sealed by heat welding so as to be housed inside. And between these aluminum laminated cases 4 and 4, the current collection lead | read | reed 3 and the 3 front-end | tip parts 3c and 3c protrude, and become a positive / negative terminal. Further, the current collector leads 3, 3 sandwiched between the aluminum laminate cases 4, 4 are reliably sealed at the interface between the metal and the resin by the tab films 7, 7.

上記構成によれば、巻きシート２に止め付けられた集電リード３、３は、長手方向が巻きシート２の軸線方向Ｃに沿うことになり、この軸線方向Ｃに対して傾斜するようなことがなくなる。これは、樹脂シート２ａが方形であることから、内側の巻き端２ｃが軸線方向Ｃに沿うことになり、方形の集電リード３、３の側端辺がこの内側の巻き端２ｃに沿うためにである。また、集電リード３、３の巻きシート２への止め付け作業時に、この集電リード３、３を軸線方向Ｃに確実に沿わせるだけでなく、集電リード３、３の突出部３ｂ、３ｂを発電要素の電極に接続する超音波溶接の作業時にも、内側の巻き端２ｃの端辺が基部３ａ、３ａの片側の側端辺にほぼ当接した状態で集電リード３、３の位置を維持しようとするので、これらの集電リード３、３に超音波振動が加わっても、軸線方向Ｃに対して傾斜するようなことがなくなる。   According to the above configuration, the current collecting leads 3 and 3 fastened to the wound sheet 2 have a longitudinal direction along the axial direction C of the wound sheet 2 and are inclined with respect to the axial direction C. Disappears. This is because the resin sheet 2a is square, and the inner winding end 2c is along the axial direction C, and the side edges of the rectangular current collecting leads 3 and 3 are along the inner winding end 2c. To. Further, when the current collecting leads 3 and 3 are fastened to the winding sheet 2, not only the current collecting leads 3 and 3 are surely along the axial direction C but also the protruding portions 3b of the current collecting leads 3 and 3; Even during the ultrasonic welding operation for connecting the electrode 3b to the electrode of the power generation element, the current collecting leads 3 and 3 are kept in a state in which the end of the inner winding end 2c is substantially in contact with one side of the base 3a and 3a. Since the position is to be maintained, even if ultrasonic vibration is applied to these current collecting leads 3 and 3, there is no inclination with respect to the axial direction C.

しかも、集電リード３、３の側端辺は、樹脂シート２ａの内側の巻き端２ｃの端辺と目測だけで沿わせるのではなく、実際にこれらを向かい合わせに突き合わせて沿わすことができるので、集電リード３、３の巻きシート２への止め付け作業が容易となる。さらに、正極用と負極用の集電リード３、３の側端辺は、樹脂シート２ａにおける同じ内側の巻き端２ｃの端辺に沿わせるので、これら正極用と負極用の集電リード３、３の間で位置ずれが生じるのを防止することもできる。   In addition, the side edges of the current collecting leads 3 and 3 are not aligned with the edges of the winding end 2c inside the resin sheet 2a only by visual inspection, but can actually be aligned to face each other. Therefore, the operation of fastening the current collecting leads 3 and 3 to the wound sheet 2 becomes easy. Furthermore, since the side edges of the positive and negative current collecting leads 3 and 3 are along the same inner edge 2c of the resin sheet 2a, the positive and negative current collecting leads 3 and 3 It is also possible to prevent displacement between the three.

なお、上記実施形態では、樹脂シート２ａを筒状に巻いた巻きシート２を作製後に、集電リード３、３をこの巻きシート２に止め付ける製造方法について説明したが、図２に示すように、予め方形の樹脂シート２ａの一方の端２ｃの端辺に、集電リード３、３の基部３ａ、３ａの側端辺を向かい合わせに沿わせて、粘着テープ５等により止め付けるようにしてもよい。この場合、樹脂シート２ａを集電リード３、３と共に筒状に巻いて端部を止め付けて巻きシート２を作製する。そして、以降の工程では、上記実施形態と同様に、発電要素を作製して、集電リード３、３の突出部３ｂ、３ｂを発電要素の電極に接続する。   In the above embodiment, the manufacturing method in which the current collecting leads 3 and 3 are fastened to the wound sheet 2 after producing the wound sheet 2 in which the resin sheet 2a is wound into a cylindrical shape has been described. As shown in FIG. The side edges of the base portions 3a and 3a of the current collecting leads 3 and 3 are faced to the end of one end 2c of the rectangular resin sheet 2a in advance, and are fixed with an adhesive tape 5 or the like. Also good. In this case, the wound sheet 2 is produced by winding the resin sheet 2 a together with the current collecting leads 3, 3 in a cylindrical shape and fastening the ends. In the subsequent steps, as in the above embodiment, the power generation element is manufactured, and the protruding portions 3b and 3b of the current collecting leads 3 and 3 are connected to the electrodes of the power generation element.

また、上記実施形態では、正極用の集電リード３にアルミニウム板を用い、負極用の集電リード３に銅板を用いる場合を示したが、これらの材質は、電池の種類や極性に応じて任意に変更可能であり、上記実施形態の場合に限定されない。   Moreover, although the case where an aluminum plate was used for the current collection lead 3 for positive electrodes and a copper plate was used for the current collection lead 3 for negative electrodes was shown in the said embodiment, these materials depend on the kind and polarity of a battery. It can be arbitrarily changed and is not limited to the above embodiment.

また、上記実施形態では、巻きシート２に正極用と負極用の集電リード３、３を止め付ける場合を示したが、正極用と負極用のいずれか一方の集電リード３だけを止め付ける場合であっても、同様に実施可能である。   In the above embodiment, the case where the positive and negative current collecting leads 3 and 3 are fastened to the wound sheet 2 is shown, but only either the positive current or negative current collecting lead 3 is fastened. Even if it is a case, it can be implemented similarly.

また、上記実施形態では、集電リード３にタブフィルム７が貼り付けられている場合を示したが、アルミラミネートケース４、４の間の封止が確実に行われるのであれば、必ずしもタブフィルム７を用いる必要はなく、しかも、金属容器等の他の電池ケースを用いる場合にも、タブフィルム７は必ずしも必要ではない。さらに、上記実施形態では、集電リード３の先端部３ｃが端子となる場合を示したが、この先端部３ｃは、必ずしも端子である必要はなく、別部品の端子から引き出された接続部に接続されるようになっていてもよい。さらに、上記実施形態では、集電リード３が方形の薄板である場合を示したが、少なくとも巻きシート２の内側の巻き端２ｃの端辺に沿わせる側端辺が直線状であれば、他の部分の形状は任意である。例えば、集電リード３の先端部３ｃは、別部品の端子から引き出された接続部に接続されるための特別の形状をしている場合もある。   Moreover, in the said embodiment, although the case where the tab film 7 was affixed on the current collection lead | read | reed 3 was shown, if sealing between the aluminum laminate cases 4 and 4 is performed reliably, a tab film is not necessarily required. 7 is not necessary, and the tab film 7 is not always necessary when using other battery cases such as metal containers. Furthermore, in the above-described embodiment, the case where the tip 3c of the current collecting lead 3 is a terminal is shown. However, the tip 3c is not necessarily a terminal, and is not connected to a connection part drawn from a terminal of another component. It may be connected. Furthermore, in the said embodiment, although the case where the current collection lead 3 was a rectangular thin plate was shown, if the side edge along the edge of the winding edge 2c inside the winding sheet 2 is a straight line, other The shape of this part is arbitrary. For example, the tip portion 3c of the current collecting lead 3 may have a special shape for connecting to a connecting portion drawn from a terminal of another component.

また、上記実施形態では、集電リード３の基部３ａを巻きシート２の筒状の内側に挿入して、この集電リード３の先端部３ｃを樹脂シート２ａの内側の巻き端２ｃの端辺に沿わせる場合を示したが、集電リード３の基部３ａを巻きシート２の筒状の外側に配置し、この集電リード３の先端部３ｃを樹脂シート２ａの外側の巻き端２ｂの端辺に沿わせるようにしても、同様の効果を得ることができる。   Moreover, in the said embodiment, the base 3a of the current collection lead 3 is inserted in the cylindrical inside of the winding sheet 2, and the front-end | tip part 3c of this current collection lead 3 is the edge of the winding end 2c inside the resin sheet 2a The base 3a of the current collecting lead 3 is arranged outside the cylindrical shape of the wound sheet 2, and the tip 3c of the current collecting lead 3 is connected to the end of the wound end 2b outside the resin sheet 2a. The same effect can be obtained even if it is along the side.

また、上記実施形態では、集電リード３の側端辺を樹脂シート２ａの巻き端２ｂ、２ｃの端辺に向かい合わせに沿わせる場合を示したが、集電リード３を巻き端２ｂ、２ｃの端部に重なり合わせて側端辺を端辺に沿わせるようにすることもできる。この場合であっても、巻きシート２に止め付けられた集電リード３、３は、長手方向が巻きシート２の軸線方向Ｃに沿うことになり、この軸線方向Ｃに対して傾斜するようなことがなくなると共に、正極用と負極用の集電リード３、３の側端辺を樹脂シート２ａにおける同じ巻き端２ｂ又は巻き端２ｃの端辺に沿わせることにより、これら正極用と負極用の集電リード３、３の間で位置ずれが生じるのを防止することもできるという効果が得られる。   Moreover, in the said embodiment, although the case where the side edge of the current collection lead 3 was made to face along the edge of the winding ends 2b and 2c of the resin sheet 2a was shown, the current collection lead 3 is shown in winding ends 2b and 2c. It is also possible to make the side edge along the edge so as to overlap with the edge. Even in this case, the current collecting leads 3 and 3 fastened to the winding sheet 2 have a longitudinal direction along the axial direction C of the winding sheet 2 and are inclined with respect to the axial direction C. And the side edges of the positive and negative current collecting leads 3 and 3 are aligned with the same winding edge 2b or winding edge 2c of the resin sheet 2a. It is possible to prevent the positional deviation between the current collecting leads 3 and 3 from being prevented.

また、上記実施形態では、樹脂シート２ａが方形であると説明したが、この方形とは、筒状に巻いたときに、集電リード３の側端辺が沿う内側の巻き端２ｃ又は外側の巻き端２ｂが巻きシート２の軸線方向Ｃに沿っていればよいので、厳密な長方形でなくてもよく、四方の角がほぼ直角の樹脂シート２ａであればよい。さらに、集電リード３の側端辺が沿わない辺については、完全な直線状である必要はなく、何らかの事情で切り込みや多少の凹凸が形成されていてもよい。   Moreover, in the said embodiment, although the resin sheet 2a was demonstrated that it was a square, this square is the inner side winding edge 2c along which the side edge of the current collection lead 3 follows, or an outer side when winding in a cylinder shape. Since the winding end 2b only needs to be along the axial direction C of the winding sheet 2, it does not have to be a strict rectangle, and may be a resin sheet 2a whose four corners are substantially perpendicular. Further, the side where the side end side of the current collecting lead 3 does not follow is not necessarily a straight line, and may be cut or slightly uneven for some reason.

また、上記実施形態では、樹脂シート２ａが方形である場合を示したが、この樹脂シート２ａの巻き端２ｂ、２ｃの端辺に集電リード３の側端辺を沿わせて止め付けるだけで、この集電リード３の位置決めが容易になるという効果が得られるので、必ずしも方形である必要はなく、平行四辺形や台形等であってもよい。例えば樹脂シート２ａが平行四辺形である場合、この樹脂シート２ａの巻き端２ｂ、２ｃの端辺は、巻きシート２の軸線方向Ｃに対して一定の角度で傾斜し、この傾斜した端辺に側端辺を沿わせた集電リード３も傾斜して止め付けられることになるが、この集電リード３の先端部３ｃの位置がこのような傾斜を考慮して予め所定の位置となるように定めることは可能であるため、位置ずれのおそれは生じない。   Moreover, in the said embodiment, although the case where the resin sheet 2a was a square was shown, it is only to fix the side edge of the current collection lead 3 along the edge of the winding ends 2b and 2c of this resin sheet 2a. Since the effect of facilitating positioning of the current collecting lead 3 is obtained, the current collecting lead 3 does not necessarily have to be a square, and may be a parallelogram, a trapezoid, or the like. For example, when the resin sheet 2a is a parallelogram, the ends of the winding ends 2b and 2c of the resin sheet 2a are inclined at a certain angle with respect to the axial direction C of the winding sheet 2, and the inclined ends are The current collecting lead 3 along the side edge is also inclined and fixed, but the position of the tip 3c of the current collecting lead 3 is set to a predetermined position in consideration of such inclination. Therefore, there is no possibility of misalignment.

また、上記実施形態では、巻樹脂シート２ａを筒状に巻いて巻きシート２を作製する場合を示したが、例えばこの樹脂シート２ａに代えて紙シートを用いることも可能であり、シートの材質は任意である。   Moreover, in the said embodiment, although the case where the wound resin sheet 2a was wound cylindrically and the wound sheet 2 was produced was shown, it can replace with this resin sheet 2a, for example, can also use a paper sheet, The material of a sheet | seat Is optional.

また、上記実施形態では、間隔を広狭変化させることができる２枚の金属製の平板からなる巻回軸を示したが、この巻回軸の構成は任意であり、上記実施形態の構成には限定されない。   Moreover, in the said embodiment, although the winding axis | shaft which consists of two metal flat plates which can change a space | interval can be changed, the structure of this winding axis | shaft is arbitrary, In the structure of the said embodiment, It is not limited.

また、上記実施形態では、長円筒形の巻回型の発電要素１について示したが、巻回型であればこの発電要素１の形状も任意であり、通常の円筒形の発電要素１にも同様に実施可能である。さらに、上記実施形態では、非水電解質二次電池について説明したが、この電池の種類も任意であり、一次電池であっても同様に実施可能である。   In the above-described embodiment, the long cylindrical power generation element 1 is shown. However, the shape of the power generation element 1 is arbitrary as long as it is a winding type. It can be implemented similarly. Furthermore, in the said embodiment, although the nonaqueous electrolyte secondary battery was demonstrated, the kind of this battery is also arbitrary and even if it is a primary battery, it can implement similarly.

本発明の一実施形態を示すものであって、集電リードを止め付けた巻きシートの斜視図である。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a wound sheet, showing an embodiment of the present invention, with a current collecting lead fastened. 本発明の一実施形態を示すものであって、予め集電リードを止め付けた樹脂シートを筒状に巻いて作製する巻きシートの製造工程を示す斜視図である。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view illustrating a manufacturing process of a wound sheet that is an embodiment of the present invention and is manufactured by winding a resin sheet with a current collecting lead fixed in advance into a cylindrical shape. 長円筒形の巻回型の発電要素を用いた非水電解質二次電池の構成例を示す組み立て斜視図である。It is an assembly perspective view which shows the structural example of the nonaqueous electrolyte secondary battery using a long cylindrical winding type electric power generation element. 従来例を示すものであって、止め付けた集電リードが傾斜した場合の巻きシートの斜視図である。FIG. 10 is a perspective view of a wound sheet when a current collecting lead that is secured is inclined, showing a conventional example. 従来例を示すものであって、止め付けた正極用と負極用の集電リードが位置ずれした場合の巻きシートの斜視図である。FIG. 9 is a perspective view of a wound sheet in a case where the conventional positive electrode and negative electrode current collecting leads are displaced from each other, showing a conventional example.

符号の説明Explanation of symbols

１ 発電要素
１ａ 電極
１ｂ 電極
２ シート
２ａ 樹脂シート
２ｂ 外側の巻き端
２ｃ 内側の巻き端
３ 集電リード
３ａ 基部
３ｂ 突出部
３ｃ 先端部
４ アルミラミネートケース
５ 粘着テープ
６ 粘着テープ
７ タブフィルム DESCRIPTION OF SYMBOLS 1 Power generation element 1a Electrode 1b Electrode 2 Sheet 2a Resin sheet 2b Outer winding end 2c Inner winding end 3 Current collecting lead 3a Base part 3b Protruding part 3c Tip part 4 Aluminum laminate case 5 Adhesive tape 6 Adhesive tape 7 Tab film

Claims (3)

シートを筒状に巻いて端部を止め付けた巻きシートに、正極と負極をセパレータを介して巻回した巻回型の発電要素を用いた電池において、
前記巻きシートの筒状の内側又は外側に基部を配置し、この筒状から突出した突出部を発電要素の正極又は負極に接続した集電リードが、基部の側端辺を巻きシートにおけるシートの巻き端の端辺に沿わせて、この巻きシートに止め付けられていることを特徴とする電池。 In a battery using a wound type power generation element in which a positive electrode and a negative electrode are wound through a separator, on a wound sheet in which a sheet is wound into a cylindrical shape and the end is stopped,
A current collecting lead in which a base portion is disposed inside or outside the cylindrical shape of the wound sheet and the protruding portion protruding from the cylindrical shape is connected to the positive electrode or the negative electrode of the power generation element, A battery characterized by being fixed to the winding sheet along the edge of the winding end. シートを筒状に巻いた巻きシートの筒状の内側又は外側に集電リードの基部を配置すると共に、この基部の側端辺を巻きシートにおけるシートの巻き端の端辺に沿わせて、集電リードを巻きシートに止め付ける工程と、
前記巻きシートに正極と負極をセパレータを介して巻回し巻回型の発電要素を作製する工程と、
前記巻きシートの筒状から突出した集電リードの突出部を発電要素の正極又は負極に接続する工程とを備えたことを特徴とする電池の製造方法。 The base part of the current collecting lead is disposed inside or outside the cylindrical shape of the wound sheet obtained by winding the sheet, and the side edge of the base part is aligned with the edge of the wound end of the sheet in the wound sheet. A process of fixing the electric lead to the wound sheet;
A step of winding a positive electrode and a negative electrode on the wound sheet through a separator to produce a wound type power generation element;
And a step of connecting a protruding portion of the current collecting lead protruding from the cylindrical shape of the wound sheet to a positive electrode or a negative electrode of the power generation element. シートの一方の端辺に集電リードの基部の側端辺を沿わせてこの集電リードをシートに止め付ける工程と、
前記シートを、集電リードを沿わせた端辺が巻き端となるように筒状に巻いて端部を止め付けることにより巻きシートを作製する工程と、
前記巻きシートに正極と負極をセパレータを介して巻回し巻回型の発電要素を作製する工程と、
前記巻きシートの筒状から突出した集電リードの突出部を発電要素の正極又は負極に接続する工程とを備えたことを特徴とする電池の製造方法。 A step of fixing the current collecting lead to the sheet along the side edge of the base of the current collecting lead along one edge of the sheet;
A step of producing a wound sheet by winding the sheet in a cylindrical shape so that the end side along the current collecting lead is a winding end and fastening the end part;
A step of winding a positive electrode and a negative electrode on the wound sheet through a separator to produce a wound type power generation element;
And a step of connecting a protruding portion of the current collecting lead protruding from the cylindrical shape of the wound sheet to a positive electrode or a negative electrode of the power generation element.
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