JP6582426B2 - Method for manufacturing electrode separator assembly - Google Patents

Method for manufacturing electrode separator assembly Download PDF

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JP6582426B2
JP6582426B2 JP2015017250A JP2015017250A JP6582426B2 JP 6582426 B2 JP6582426 B2 JP 6582426B2 JP 2015017250 A JP2015017250 A JP 2015017250A JP 2015017250 A JP2015017250 A JP 2015017250A JP 6582426 B2 JP6582426 B2 JP 6582426B2
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electrode
separator
bag
housing portion
welding
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JP2016143509A (en
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厚志 南形
厚志 南形
寛恭 西原
寛恭 西原
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Toyota Industries Corp
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

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  • Electric Double-Layer Capacitors Or The Like (AREA)
  • Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
  • Cell Separators (AREA)
  • Secondary Cells (AREA)

Description

本発明は、電極セパレータアッセンブリの製造方法に係り、詳しくは袋状セパレータにタブが突出する状態で電極が収容されるとともに、袋状セパレータの４つの辺に形成された位置決め部で位置決め固定された電極セパレータアッセンブリの製造方法に関する。   The present invention relates to a method of manufacturing an electrode separator assembly, and more specifically, an electrode is accommodated in a state where a tab protrudes from a bag-shaped separator, and positioned and fixed by positioning portions formed on four sides of the bag-shaped separator. The present invention relates to a method of manufacturing an electrode separator assembly.

二次電池やキャパシタのような蓄電装置は再充電が可能であり、繰り返し使用することができるため電源として広く利用されている。二次電池として、シート状の正極とシート状の負極が間にセパレータが介在する状態で積層された積層型の電極組立体を備えたものがある。シート状の正極及び負極は、矩形状の金属箔に活物質層が形成され、電極組立体からの電力の取り出しを行うためのタブを有する。   Power storage devices such as secondary batteries and capacitors are widely used as power sources because they can be recharged and can be used repeatedly. Some secondary batteries include a laminated electrode assembly in which a sheet-like positive electrode and a sheet-like negative electrode are laminated with a separator interposed therebetween. The sheet-like positive electrode and negative electrode have an active material layer formed on a rectangular metal foil and have a tab for taking out electric power from the electrode assembly.

セパレータとして袋状のものを使用し、正極を袋状セパレータに収容して、正極及び負極を交互に積層した積層型の電極組立体もある。電池のスペース効率を高めるためには電極とセパレータのサイズの差をできるだけ小さくし、かつ袋状セパレータに収容された正極と、負極とが所定の位置関係で積層される必要がある。   There is also a stacked electrode assembly in which a bag-shaped separator is used, a positive electrode is accommodated in a bag-shaped separator, and positive electrodes and negative electrodes are alternately stacked. In order to increase the space efficiency of the battery, it is necessary to make the difference in size between the electrode and the separator as small as possible and to stack the positive electrode and the negative electrode accommodated in the bag-shaped separator in a predetermined positional relationship.

電極セパレータアッセンブリの製造方法として、図８に示すように、２枚重ねた矩形の多孔質フィルムの４つのセパレータ辺５１ａ，５１ｂ，５１ｃ，５１ｄのうちの隣接した２つのセパレータ辺５１ｂ，５１ｄに電極６１の挿入口５２を形成するように熱融着部５３が形成された袋状セパレータ５０を使用する方法が提案されている（特許文献１）。この方法では、熱融着部５３が形成されてない２つのセパレータ辺５１ｂ，５１ｄを挿入口５２として電極６１を図８に鎖線で示すように斜めに挿入した後、電極６１を矢印方向に回動させて各熱融着部５３で位置決めして真っ直ぐな状態に配置する。その後、セパレータ辺５１ｂの挿入口５２を分断する位置に抜け止め防止用の熱融着部５５を形成する。その結果、電極６１は、４つの辺の熱融着部５３，５５で位置決めされた状態で袋状セパレータ５０に固定される。   As a manufacturing method of the electrode separator assembly, as shown in FIG. 8, electrodes are provided on two separator sides 51b and 51d adjacent to each other among four separator sides 51a, 51b, 51c and 51d of a rectangular porous film which is stacked two times. There has been proposed a method of using a bag-like separator 50 in which a heat-sealing part 53 is formed so as to form 61 insertion ports 52 (Patent Document 1). In this method, the two separator sides 51b and 51d in which the heat fusion part 53 is not formed are inserted into the insertion port 52, and the electrode 61 is inserted obliquely as shown by a chain line in FIG. It is moved and positioned at each heat fusion portion 53 and arranged in a straight state. Thereafter, a heat-sealing portion 55 for preventing the separation is formed at a position where the insertion port 52 of the separator side 51b is divided. As a result, the electrode 61 is fixed to the bag-like separator 50 in a state where the electrode 61 is positioned by the heat fusion portions 53 and 55 on the four sides.

国際公開第２００８／０９０８２４号International Publication No. 2008/090824

特許文献１の電極セパレータアッセンブリの製造方法では、２枚重ねた矩形の多孔質フィルムに熱融着部５３を形成して１つずつ袋状セパレータ５０を形成しては、その袋状セパレータ５０に電極６１を挿入した後、袋状セパレータ５０の挿入口５２を分断する位置に熱融着部５５を形成している。そのため、電極セパレータアッセンブリの製造に時間がかかりすぎる。   In the manufacturing method of the electrode separator assembly of Patent Document 1, the bag-shaped separator 50 is formed one by one by forming the heat-sealed portion 53 on the two rectangular porous films stacked one on the other. After the electrode 61 is inserted, the heat fusion part 55 is formed at a position where the insertion port 52 of the bag-like separator 50 is divided. Therefore, it takes too much time to manufacture the electrode separator assembly.

本発明の目的は、袋状セパレータにタブが突出する状態で電極が収容されるとともに、袋状セパレータの４つの辺に形成された位置決め部で位置決め固定された電極セパレータアッセンブリの製造工程におけるマシンサイクルタイムを短縮することができる電極セパレータアッセンブリの製造方法を提供することにある。   An object of the present invention is to provide a machine cycle in a manufacturing process of an electrode separator assembly in which an electrode is accommodated in a state where a tab protrudes from a bag-shaped separator and is positioned and fixed by positioning portions formed on four sides of the bag-shaped separator. An object of the present invention is to provide a method of manufacturing an electrode separator assembly that can reduce the time.

上記課題を解決する電極セパレータアッセンブリの製造方法は、平面視矩形状の袋状セパレータに、端部にタブを有し、かつ平面視矩形状の電極が、前記電極のタブを、前記袋状セパレータから突出させた状態で収容されるとともに、前記袋状セパレータの４つの辺に形成された位置決め部で位置決め固定された電極セパレータアッセンブリの製造方法である。そして、帯状の多孔質絶縁材に、少なくとも前記電極の２辺と当接する前記位置決め部を形成して３辺で前記電極と当接する電極収容部を形成する電極収容部形成工程と、前記電極収容部に前記電極を挿入する電極挿入工程と、前記電極が挿入された状態の前記電極収容部の残りの１つの辺を接合して前記電極を前記電極収容部に固定する電極固定工程と、前記電極収容部に前記電極が固定された後、袋状セパレータを切り離す袋状セパレータ切り離し工程とを備える。   A method of manufacturing an electrode separator assembly that solves the above problems includes a bag-like separator having a rectangular shape in plan view, a tab at an end, and the electrode having a rectangular shape in plan view having the tab of the electrode and the bag-like separator. And manufacturing the electrode separator assembly that is positioned and fixed by positioning portions formed on the four sides of the bag-shaped separator. An electrode housing portion forming step of forming the positioning portion that contacts at least two sides of the electrode and forming an electrode housing portion that contacts the electrode on three sides in the belt-like porous insulating material; and the electrode housing An electrode inserting step of inserting the electrode into a portion, an electrode fixing step of fixing the electrode to the electrode accommodating portion by joining the remaining one side of the electrode accommodating portion in a state where the electrode is inserted; A bag separator separating step of separating the bag separator after the electrode is fixed to the electrode housing portion.

この構成によれば、電極収容部形成工程において、帯状の多孔質絶縁材に、３辺で電極と当接する電極収容部が形成され、電極挿入工程で電極収容部に電極が挿入される。電極固定工程では、電極が挿入された状態の電極収容部の残りの１つの辺を接合して電極を電極収容部に固定する。袋状セパレータ切り離し工程では、電極収容部に電極が固定された後、袋状セパレータを切り離す。そのため、個片の袋状セパレータを形成した後、個片の袋状セパレータに電極を挿入し、その後、位置決め固定用の位置決め部を形成する方法と異なり、電極挿入工程、電極固定工程、袋状セパレータ切り離し工程の作業を並行して行うことが可能になる。したがって、袋状セパレータにタブが突出する状態で電極が収容されるとともに、袋状セパレータの４つの辺に形成された位置決め部で位置決め固定された電極セパレータアッセンブリの製造工程におけるマシンサイクルタイムを短縮することができる。   According to this configuration, in the electrode housing portion forming step, an electrode housing portion that contacts the electrode on three sides is formed in the belt-shaped porous insulating material, and the electrode is inserted into the electrode housing portion in the electrode insertion step. In the electrode fixing step, the remaining one side of the electrode housing portion with the electrode inserted is joined to fix the electrode to the electrode housing portion. In the bag separator separation process, after the electrode is fixed to the electrode housing portion, the bag separator is separated. Therefore, unlike the method of forming an individual bag-shaped separator and then inserting an electrode into the individual bag-shaped separator and then forming a positioning portion for positioning and fixing, an electrode insertion step, an electrode fixing step, a bag shape It is possible to perform the work of the separator separation process in parallel. Accordingly, the electrode is accommodated with the tab protruding from the bag-like separator, and the machine cycle time in the manufacturing process of the electrode separator assembly positioned and fixed by the positioning portions formed on the four sides of the bag-like separator is shortened. be able to.

前記位置決め部の形成は、ローラによる熱溶着で連続的に行われることが好ましい。位置決め部の形成は、ローラによる熱溶着に限らず熱板溶着や、接着剤を用いた接着や、レーザー溶着等でも可能である。しかし、ローラによる熱溶着の方が、装置が簡単で、低コストで位置決め部を形成することができる。   The positioning portion is preferably formed continuously by heat welding with a roller. The positioning portion can be formed not only by heat welding using a roller but also by hot plate welding, adhesion using an adhesive, laser welding, or the like. However, thermal welding using a roller is simpler in apparatus and can form a positioning portion at lower cost.

隣接する前記電極収容部の間の位置決め部は同時に形成され、前記袋状セパレータ切り離し工程において前記位置決め部の中心部分で切り離されることが好ましい。帯状の多孔質絶縁材に、電極収容部を隣接して形成する場合、各電極収容部を構成する位置決め部をそれぞれ独立して形成することもできるが、隣接する位置決め部を一体形成する方が複数の位置決め部を効率良く形成することができる。   It is preferable that a positioning portion between the adjacent electrode housing portions is formed at the same time, and is cut off at a central portion of the positioning portion in the bag-like separator cutting step. When the electrode housing portions are formed adjacent to the strip-shaped porous insulating material, the positioning portions constituting each electrode housing portion can be formed independently, but it is preferable to integrally form the adjacent positioning portions. A plurality of positioning portions can be formed efficiently.

本発明によれば、袋状のセパレータにタブが突出する状態で電極が収容されるとともに、セパレータの４つの辺に形成された位置決め部で位置決め固定された電極セパレータアッセンブリの製造工程におけるマシンサイクルタイムを短縮することができる。   According to the present invention, the machine cycle time in the manufacturing process of the electrode separator assembly in which the electrode is accommodated with the tab protruding from the bag-shaped separator and positioned and fixed by the positioning portions formed on the four sides of the separator. Can be shortened.

第１の実施形態の電極セパレータアッセンブリ製造装置の部分概略斜視図。The partial schematic perspective view of the electrode separator assembly manufacturing apparatus of 1st Embodiment. （ａ）は電極の３辺と当接する位置決め部を形成するローラの概略斜視図、（ｂ）は残りの１辺に位置決め部を形成するローラの概略斜視図。(A) is a schematic perspective view of the roller which forms the positioning part which contact | abuts three sides of an electrode, (b) is a schematic perspective view of the roller which forms a positioning part in the remaining 1 side. （ａ）〜（ｆ）は電極セパレータアッセンブリの製造手順を示す模式図。(A)-(f) is a schematic diagram which shows the manufacture procedure of an electrode separator assembly. 第２の実施形態における製造装置の部分概略斜視図。The partial schematic perspective view of the manufacturing apparatus in 2nd Embodiment. （ａ）〜（ｃ）は袋状セパレータへの電極の挿入及び抜け止め用の位置決め部を形成する手順を示す模式図。(A)-(c) is a schematic diagram which shows the procedure which forms the positioning part for insertion of an electrode to a bag-shaped separator, and a removal prevention. （ａ）は別の実施形態の多孔質フィルムの模式斜視図、（ｂ）は位置決め部が形成された状態の模式正面図。(A) is a model perspective view of the porous film of another embodiment, (b) is a model front view of the state in which the positioning part was formed. （ａ）は別の実施形態の多孔質フィルムの模式斜視図、（ｂ）は位置決め部が形成された状態の模式正面図。(A) is a model perspective view of the porous film of another embodiment, (b) is a model front view of the state in which the positioning part was formed. 従来技術の袋状セパレータに電極を挿入する状態を示す図。The figure which shows the state which inserts an electrode in the bag-shaped separator of a prior art.

（第１の実施形態）
以下、本発明を具体化した第１の実施形態を図１〜図３にしたがって説明する。
この実施形態では、電極収容部形成工程と、電極挿入工程と、電極固定工程と、袋状セパレータ切り離し工程とが連続して順に行われる。電極収容部形成工程は、帯状の多孔質絶縁材に、電極の３辺と当接する位置決め部を形成して３辺で電極と当接する電極収容部を形成する。電極挿入工程は、電極収容部形成工程で形成された電極収容部に電極を挿入する。電極固定工程は、電極が挿入された状態の電極収容部の残りの１つの辺を接合して電極を電極収容部に固定する。袋状セパレータ切り離し工程は、電極収容部に電極が固定された後、袋状セパレータを切り離す。 (First embodiment)
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS.
In this embodiment, the electrode housing part forming step, the electrode inserting step, the electrode fixing step, and the bag separator separating step are sequentially performed in order. In the electrode housing portion forming step, a positioning portion that contacts the three sides of the electrode is formed on the belt-shaped porous insulating material, and an electrode housing portion that contacts the electrode on three sides is formed. In the electrode insertion step, an electrode is inserted into the electrode housing portion formed in the electrode housing portion forming step. In the electrode fixing step, the remaining one side of the electrode housing portion with the electrode inserted is joined to fix the electrode to the electrode housing portion. In the bag separator separation step, the bag separator is separated after the electrode is fixed to the electrode housing portion.

図１に示すように、電極収容部形成工程、電極挿入工程、電極固定工程及び袋状セパレータ切り離し工程を順に行う装置は、一対の第１の溶着ローラ１１を備えている。両第１の溶着ローラ１１は、帯状の多孔質絶縁材としての多孔質フィルム１２の幅の約２／３の長さに形成されるとともに、上下方向に延びる状態で配置されている。   As shown in FIG. 1, an apparatus that sequentially performs an electrode housing portion forming step, an electrode inserting step, an electrode fixing step, and a bag-like separator separating step includes a pair of first welding rollers 11. Both the first welding rollers 11 are formed to have a length of about 2/3 of the width of the porous film 12 as a band-shaped porous insulating material, and are arranged so as to extend in the vertical direction.

図１及び図２（ａ）に示すように、第１の溶着ローラ１１には、下端の外周に沿って環状突部１１ａが形成され、環状突部１１ａに連続して、上端が第１の溶着ローラ１１の上端まで延びる直線突部１１ｂも形成されている。一対の第１の溶着ローラ１１は、環状突部１１ａ及び直線突部１１ｂが加熱された状態で同期して回転され、重ねられた状態で一対の第１の溶着ローラ１１間を通過する２枚の多孔質フィルム１２を環状突部１１ａ及び直線突部１１ｂで押圧しつつ下流側へ送り出すようになっている。   As shown in FIGS. 1 and 2 (a), the first welding roller 11 is formed with an annular protrusion 11a along the outer periphery of the lower end, and the upper end of the first welding roller 11 is continuous with the annular protrusion 11a. A linear protrusion 11b extending to the upper end of the welding roller 11 is also formed. The pair of first welding rollers 11 are rotated in synchronization with the annular projection 11a and the linear projection 11b being heated, and pass between the pair of first welding rollers 11 in a stacked state. The porous film 12 is sent to the downstream side while being pressed by the annular protrusion 11a and the linear protrusion 11b.

環状突部１１ａは、重ねられた状態で両第１の溶着ローラ１１の間に導入される２枚の多孔質フィルム１２の幅方向の下端を溶着して、電極としての正極１３に対して、タブ１３ａの突出側の辺と反対側の辺に当接する位置決め部としての溶着部１４ａを形成するようになっている。正極１３は、金属箔の両面に活物質層（図示せず）が形成されている。   The annular protrusion 11a is welded at the lower end in the width direction of the two porous films 12 introduced between the first welding rollers 11 in an overlapped state, and with respect to the positive electrode 13 as an electrode, A welded portion 14a is formed as a positioning portion that comes into contact with the side opposite to the protruding side of the tab 13a. The positive electrode 13 has active material layers (not shown) formed on both surfaces of a metal foil.

直線突部１１ｂは、第１の溶着ローラ１１が１回転することにより、多孔質フィルム１２に、下端が溶着部１４ａの一端に連続した状態で多孔質フィルム１２の幅方向に延びる溶着部１４ｂ、即ち溶着部１４ａに対して直角に延びる溶着部１４ｂを間欠的に形成するようになっている。溶着部１４ａが、正極１３のタブ１３ａの突出辺と反対側の辺と当接する位置決め部を構成し、溶着部１４ｂが正極１３のタブ１３ａの突出辺を挟む２辺と当接する位置決め部を形成する。直線突部１１ｂの幅は環状突部１１ａの幅の２倍に形成されている。図３に示すように、溶着部１４ａ，１４ｂにより囲繞された部分が電極収容部１６となる。   When the first welding roller 11 makes one rotation, the linear protrusion 11b has a welded portion 14b extending in the width direction of the porous film 12 in a state where the lower end is continuous with one end of the welded portion 14a. That is, the welding part 14b extended at right angles with respect to the welding part 14a is formed intermittently. The welded portion 14a constitutes a positioning portion that contacts the side opposite to the protruding side of the tab 13a of the positive electrode 13, and the welding portion 14b forms a positioning portion that contacts two sides sandwiching the protruding side of the tab 13a of the positive electrode 13 To do. The width of the linear protrusion 11b is twice as large as the width of the annular protrusion 11a. As shown in FIG. 3, the portion surrounded by the welded portions 14 a and 14 b becomes the electrode housing portion 16.

第１の溶着ローラ１１より多孔質フィルム１２の移動方向下流側には、一対の第２の溶着ローラ１５が設けられている。第２の溶着ローラ１５は、多孔質フィルム１２の幅の１／２より短い長さに形成されるとともに、図２（ｂ）に示すように、上端には突条１５ａが、タブ１３ａの幅より若干広い間隔Δを開けてほぼ全周にわたって延びるように形成されている。突条１５ａの幅は、環状突部１１ａの幅と同じに形成されている。   A pair of second welding rollers 15 are provided downstream of the first welding roller 11 in the moving direction of the porous film 12. The second welding roller 15 is formed to have a length shorter than ½ of the width of the porous film 12, and as shown in FIG. 2B, a protrusion 15a is formed at the upper end, and the width of the tab 13a. It is formed so as to extend over substantially the entire circumference with a slightly wider interval Δ. The width of the protrusion 15a is formed to be the same as the width of the annular protrusion 11a.

突条１５ａは、第２の溶着ローラ１５が１回転することにより、多孔質フィルム１２に、正極１３のタブ１３ａを避けて、タブ１３ａの突出する側の辺と当接する位置決め部としての溶着部１４ｃを形成するようになっている。   The protrusion 15a has a welding portion as a positioning portion that contacts the side of the protruding side of the tab 13a on the porous film 12 by avoiding the tab 13a of the positive electrode 13 by rotating the second welding roller 15 once. 14c is formed.

第１の溶着ローラ１１及び第２の溶着ローラ１５に挟まれた領域の上方には、多孔質フィルム１２に形成された電極収容部１６に正極１３を挿入するためのガイド部材１７が設けられている。ガイド部材１７は、下端が電極収容部１６から離脱した待機位置（図１に示す位置）と、下端が電極収容部１６に挿入される下降位置とに昇降可能に設けられている。   Above the region sandwiched between the first welding roller 11 and the second welding roller 15, a guide member 17 for inserting the positive electrode 13 into the electrode housing portion 16 formed in the porous film 12 is provided. Yes. The guide member 17 is provided to be movable up and down between a standby position (a position shown in FIG. 1) where the lower end is separated from the electrode housing portion 16 and a lowered position where the lower end is inserted into the electrode housing portion 16.

第２の溶着ローラ１５の多孔質フィルム１２の移動方向下流側には、電極収容部１６に正極１３が挿入され、溶着部１４ｃが形成された袋状セパレータ１８を切り離す切り離し装置１９が設けられている。切り離し装置１９は、レーザー切断により多孔質フィルム１２を溶着部１４ｂの中心部分において切断して、正極１３が電極収容部１６に収容された袋状セパレータ１８を多孔質フィルム１２から切り離すようになっている。   On the downstream side of the movement direction of the porous film 12 of the second welding roller 15, a separation device 19 for separating the bag-like separator 18 in which the positive electrode 13 is inserted into the electrode housing portion 16 and the welding portion 14 c is formed is provided. Yes. The separating device 19 cuts the porous film 12 at the center of the welded portion 14b by laser cutting, and separates the bag-like separator 18 in which the positive electrode 13 is accommodated in the electrode accommodating portion 16 from the porous film 12. Yes.

次に前記のように構成された装置による電極セパレータアッセンブリの製造方法を説明する。
袋状セパレータ１８を形成する材料となる２枚の帯状の多孔質フィルム１２は、図示しない２個のアンコイラーから繰り出された後、合わされた状態で第１の溶着ローラ１１間に導入される。そして、両第１の溶着ローラ１１の回転に伴い、図３（ａ）に示すように、多孔質フィルム１２上に溶着部１４ａ，１４ｂが形成される。そして、溶着部１４ａ，１４ｂにより囲繞された領域が、正極１３のタブ１３ａの突出辺以外の３辺と当接して正極１３を位置決めした状態で収容する電極収容部１６となる。 Next, the manufacturing method of the electrode separator assembly by the apparatus comprised as mentioned above is demonstrated.
The two strip-shaped porous films 12 used as the material for forming the bag-shaped separator 18 are fed from two uncoilers (not shown) and then introduced between the first welding rollers 11 in a combined state. As the first welding rollers 11 rotate, welding portions 14a and 14b are formed on the porous film 12, as shown in FIG. And the area | region enclosed by the welding parts 14a and 14b becomes the electrode accommodating part 16 accommodated in the state which contact | abutted 3 sides other than the protrusion side of the tab 13a of the positive electrode 13, and positioned the positive electrode 13. FIG.

次に図３（ａ），（ｂ）に示すように、電極収容部１６の上方から正極１３が、電極収容部１６に挿入される。正極１３は、タブ１３ａの突出側の辺と反対側の辺から電極収容部１６に挿入される。図３（ｃ）に示すように、正極１３はタブ１３ａの一部が電極収容部１６から突出する状態で電極収容部１６に収容される。   Next, as shown in FIGS. 3A and 3B, the positive electrode 13 is inserted into the electrode housing portion 16 from above the electrode housing portion 16. The positive electrode 13 is inserted into the electrode housing portion 16 from the side opposite to the protruding side of the tab 13a. As shown in FIG. 3C, the positive electrode 13 is housed in the electrode housing portion 16 with a part of the tab 13 a protruding from the electrode housing portion 16.

次に第１の溶着ローラ１１及び第２の溶着ローラ１５が同期して回転駆動され、図３（ｄ）に示すように、正極１３が収容された電極収容部１６の上側に、正極１３のタブ１３ａ突出側の辺と当接して正極１３の位置決めを行う溶着部１４ｃが形成される。即ち、電極収容部１６に正極１３が収容され、かつ電極収容部１６の上側に、正極１３のタブ１３ａ突出側の辺と当接して正極１３の位置決めを行う溶着部１４ｃが形成された袋状セパレータ１８が形成される。また、正極１３が収容された電極収容部１６と隣接して、新たに電極収容部１６が形成される。   Next, the first welding roller 11 and the second welding roller 15 are rotationally driven in synchronization with each other, and as shown in FIG. 3 (d), the positive electrode 13 is disposed above the electrode housing portion 16 in which the positive electrode 13 is housed. A welded portion 14c that contacts the side of the protruding side of the tab 13a and positions the positive electrode 13 is formed. That is, the positive electrode 13 is accommodated in the electrode accommodating part 16, and the welding part 14c which contacts the edge | side of the tab 13a protrusion side of the positive electrode 13, and positions the positive electrode 13 on the upper side of the electrode accommodating part 16 was formed. A separator 18 is formed. Moreover, the electrode accommodating part 16 is newly formed adjacent to the electrode accommodating part 16 in which the positive electrode 13 was accommodated.

次に前記と同様にして電極収容部１６に正極１３が挿入された後、第１の溶着ローラ１１及び第２の溶着ローラ１５が同期して回転駆動される。そして、図３（ｅ）に示すように、多孔質フィルム１２には、正極１３が収容され、かつ電極収容部１６の上側に、正極１３のタブ１３ａ突出側の辺と当接して正極１３の位置決めを行う溶着部１４ｃが形成された袋状セパレータ１８が２個連続した状態となる。この状態で、多孔質フィルム１２の先端側（図３の左側）に位置する１個の袋状セパレータ１８が多孔質フィルム１２から切り離されて、図３（ｆ）に示すように、電極セパレータアッセンブリ２０が完成する。   Next, after the positive electrode 13 is inserted into the electrode housing portion 16 in the same manner as described above, the first welding roller 11 and the second welding roller 15 are rotationally driven in synchronization. As shown in FIG. 3E, the positive electrode 13 is accommodated in the porous film 12, and the upper side of the electrode accommodating portion 16 is in contact with the side of the positive electrode 13 on the protruding side of the tab 13 a and the positive electrode 13. Two bag-like separators 18 each having a welded portion 14c for positioning are in a continuous state. In this state, one bag-like separator 18 located on the front end side (the left side in FIG. 3) of the porous film 12 is cut off from the porous film 12, and as shown in FIG. 20 is completed.

即ち、電極セパレータアッセンブリ２０は、平面視矩形状の袋状セパレータ１８に、端部にタブ１３ａを有し、かつ平面視矩形状の電極（正極１３）が、電極のタブ１３ａを、袋状セパレータ１８から突出させた状態で収容されるとともに、袋状セパレータ１８の４つの辺に形成された位置決め部（溶着部１４ａ，１４ｂ，１４ｃ）で位置決め固定されている。   In other words, the electrode separator assembly 20 has a bag-shaped separator 18 having a rectangular shape in plan view, a tab 13a at the end, and a rectangular electrode (positive electrode 13) in plan view having a tab-shaped electrode. It is housed in a state of protruding from 18 and is positioned and fixed by positioning portions (welded portions 14a, 14b, 14c) formed on the four sides of the bag-like separator 18.

以下、同様にして、多孔質フィルム１２に袋状セパレータ１８が２個連続した状態となると、多孔質フィルム１２の先端側に位置する１個の袋状セパレータ１８が多孔質フィルム１２から切り離されて、電極セパレータアッセンブリ２０が形成される。完成した電極セパレータアッセンブリ２０は、次工程の電極組立体製造工程に順次搬送されて、負極と交互に積層されて積層型の電極組立体が形成される。   Hereinafter, similarly, when two bag-shaped separators 18 are continuously connected to the porous film 12, one bag-shaped separator 18 positioned on the front end side of the porous film 12 is separated from the porous film 12. The electrode separator assembly 20 is formed. The completed electrode separator assembly 20 is sequentially transferred to the next electrode assembly manufacturing process, and is alternately stacked with the negative electrode to form a stacked electrode assembly.

この実施形態によれば、以下に示す効果を得ることができる。
（１）電極セパレータアッセンブリ２０の製造方法は、袋状セパレータ１８にタブ１３ａが突出する状態で正極１３が収容されるとともに、袋状セパレータ１８の４つの辺に形成された位置決め部（溶着部１４ａ，１４ｂ，１４ｃ）で位置決め固定された電極セパレータアッセンブリ２０の製造方法である。そして、帯状の多孔質絶縁材（多孔質フィルム１２）に、正極１３の３辺と当接する位置決め部（溶着部１４ａ，１４ｂ）を形成して３辺で正極１３と当接する電極収容部１６を形成する電極収容部形成工程と、電極収容部１６に正極１３を挿入する電極挿入工程を備える。また、正極１３が挿入された状態の電極収容部１６の残りの１つの辺を接合して正極１３を電極収容部１６に固定する電極固定工程と、電極収容部１６に正極１３が固定された後、袋状セパレータ１８を切り離す袋状セパレータ切り離し工程とを備える。 According to this embodiment, the following effects can be obtained.
(1) In the manufacturing method of the electrode separator assembly 20, the positive electrode 13 is accommodated with the tab 13 a protruding from the bag-shaped separator 18, and positioning portions (welded portions 14 a) formed on the four sides of the bag-shaped separator 18. , 14b, 14c) for manufacturing the electrode separator assembly 20 positioned and fixed. And the positioning part (welding part 14a, 14b) which contact | abuts three sides of the positive electrode 13 is formed in a strip | belt-shaped porous insulating material (porous film 12), and the electrode accommodating part 16 which contact | abuts the positive electrode 13 on three sides is formed. The electrode accommodating part formation process to form and the electrode insertion process which inserts the positive electrode 13 in the electrode accommodating part 16 are provided. In addition, an electrode fixing step of fixing the positive electrode 13 to the electrode housing portion 16 by joining the remaining one side of the electrode housing portion 16 in a state where the positive electrode 13 is inserted, and the positive electrode 13 is fixed to the electrode housing portion 16. Thereafter, a bag separator separating step for separating the bag separator 18 is provided.

この構成によれば、個片の袋状セパレータを形成した後、個片の袋状セパレータに電極を挿入し、その後、位置決め固定用の位置決め部を形成する方法と異なり、電極挿入工程、電極固定工程、袋状セパレータ切り離し工程の作業を並行して行うことが可能になる。したがって、袋状セパレータ１８にタブ１３ａが突出する状態で正極１３が収容されるとともに、袋状セパレータ１８の４つの辺に形成された位置決め部（溶着部１４ａ，１４ｂ，１４ｃ）で位置決め固定された電極セパレータアッセンブリ２０の製造工程におけるマシンサイクルタイムを短縮することができる。   According to this configuration, unlike the method of forming an individual bag-shaped separator and then inserting an electrode into the individual bag-shaped separator and then forming a positioning portion for positioning and fixing, an electrode insertion step, electrode fixing It becomes possible to perform the process and the bag separator separating process in parallel. Therefore, the positive electrode 13 is accommodated in a state where the tab 13a protrudes from the bag-shaped separator 18, and is positioned and fixed by positioning portions (welded portions 14a, 14b, 14c) formed on the four sides of the bag-shaped separator 18. The machine cycle time in the manufacturing process of the electrode separator assembly 20 can be shortened.

（２）電極収容部形成工程と、電極挿入工程と、電極固定工程と、袋状セパレータ切り離し工程とが連続して行われる。したがって、各工程を切り離して行う場合に比べて、設備を設けるスペースを小さくすることができる。   (2) The electrode housing part forming step, the electrode inserting step, the electrode fixing step, and the bag separator separating step are continuously performed. Therefore, compared with the case where each process is carried out separately, the space for installing equipment can be reduced.

（３）袋状セパレータ切り離し工程で１個ずつ切り離されて製造された電極セパレータアッセンブリ２０は、次工程の電極組立体工程へ順次搬送されて電極組立体が形成される。したがって、製造された電極セパレータアッセンブリ２０を一時保管する保管場所を確保する必要がない。   (3) The electrode separator assembly 20 manufactured by cutting one by one in the bag-shaped separator cutting step is sequentially transferred to the next electrode assembly step to form an electrode assembly. Therefore, it is not necessary to secure a storage place for temporarily storing the manufactured electrode separator assembly 20.

（４）位置決め部（溶着部１４ａ，１４ｂ，１４ｃ）の形成は、ローラ（第１の溶着ローラ１１、第２の溶着ローラ１５）による熱溶着で連続的に行われる。位置決め部の形成は、ローラによる熱溶着に限らず熱板溶着や、接着剤を用いた接着や、レーザー溶着等でも可能である。しかし、ローラによる熱溶着の方が、装置が簡単で、低コストで位置決め部を形成することができる。   (4) The positioning portions (welding portions 14a, 14b, and 14c) are continuously formed by thermal welding using rollers (first welding roller 11 and second welding roller 15). The positioning portion can be formed not only by heat welding using a roller but also by hot plate welding, adhesion using an adhesive, laser welding, or the like. However, thermal welding using a roller is simpler in apparatus and can form a positioning portion at lower cost.

（５）隣接する電極収容部１６の間の位置決め部（溶着部１４ｂ）は同時に形成され、袋状セパレータ切り離し工程において位置決め部の中心部分で切り離される。帯状の多孔質絶縁材に、電極収容部１６を隣接して形成する場合、各電極収容部１６を構成する位置決め部（溶着部１４ａ，１４ｂ）をそれぞれ独立して形成することもできるが、隣接する位置決め部を一体形成する方が複数の位置決め部を効率良く形成することができる。   (5) The positioning portion (welded portion 14b) between the adjacent electrode accommodating portions 16 is formed at the same time, and is cut off at the center portion of the positioning portion in the bag-like separator cutting step. When the electrode housing portion 16 is formed adjacent to the strip-shaped porous insulating material, the positioning portions (welded portions 14a and 14b) constituting each electrode housing portion 16 can be formed independently. A plurality of positioning portions can be efficiently formed by integrally forming the positioning portions to be performed.

（第２の実施形態）
次に、第２の実施形態を図４及び図５にしたがって説明する。この実施形態では、電極収容部形成工程が別に設けられ、正極１３の３辺と当接する電極収容部１６が複数形成された多孔質フィルム１２の電極収容部１６に、順次正極１３を挿入する点が第１の実施形態と大きく異なっている。第１の実施形態と同一部分は同一符号を付して詳しい説明を省略する。 (Second Embodiment)
Next, a second embodiment will be described with reference to FIGS. In this embodiment, the electrode housing portion forming step is provided separately, and the positive electrodes 13 are sequentially inserted into the electrode housing portions 16 of the porous film 12 in which a plurality of electrode housing portions 16 that are in contact with the three sides of the positive electrode 13 are formed. Is greatly different from the first embodiment. The same parts as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

図４及び図５に示すように、電極収容部１６は、正極１３を帯状の多孔質フィルム１２の長手方向から挿入するように挿入口２１が形成されている。電極収容部１６は、正極１３のタブ１３ａ突出側の辺及びタブ１３ａ突出側の辺と反対側の辺に挟まれた辺と当接して位置決めする位置決め部としての溶着部２２ａと、溶着部２２ａの両端に連続して多孔質フィルム１２の長手方向に延びる２つの溶着部２２ｂとで構成されている。挿入口２１は、溶着部２２ａ，２２ｂが形成された後、２枚の多孔質フィルム１２の一方の多孔質フィルム１２を幅方向に切断することにより形成されている。   As shown in FIGS. 4 and 5, the electrode housing portion 16 is formed with an insertion port 21 so that the positive electrode 13 is inserted from the longitudinal direction of the belt-like porous film 12. The electrode accommodating portion 16 includes a welding portion 22a as a positioning portion that contacts and positions a side sandwiched between a tab 13a protruding side of the positive electrode 13 and a side opposite to the tab 13a protruding side, and a welding portion 22a. It is comprised by the two welding parts 22b extended in the longitudinal direction of the porous film 12 continuously on both ends. The insertion port 21 is formed by cutting one porous film 12 of the two porous films 12 in the width direction after the welded portions 22a and 22b are formed.

電極収容部１６が形成された多孔質フィルム１２は、図示しない供給リールから供給されるとともに、図４に示すように、ガイドローラ２３により移動方向がほぼ垂直下方へ向かうように案内されるようになっている。ガイドローラ２３の上方には、正極１３を電極収容部１６へ挿入するガイド部材２４が設けられている。   The porous film 12 in which the electrode accommodating portion 16 is formed is supplied from a supply reel (not shown) and is guided by a guide roller 23 so that the moving direction is substantially vertically downward as shown in FIG. It has become. Above the guide roller 23, a guide member 24 for inserting the positive electrode 13 into the electrode accommodating portion 16 is provided.

図５（ａ）に示すように、正極１３は、タブ１３ａが２枚の多孔質フィルム１２の幅方向から突出する状態で電極収容部１６に挿入される。その後、図５（ｂ）に示すように、タブ１３ａが溶着部２２ｂの先端と当接し、かつタブ１３ａの突出側の辺を挟んだ２辺のうちの一方の辺が溶着部２２ａと当接した状態で、他方の辺と当接するように溶着部２２ｃが形成されて袋状セパレータ１８が形成される。また、図５（ｂ），（ｃ）に示すように、それと並行して次の電極収容部１６に対して正極１３が挿入される。そして、第１の実施形態と同様に、袋状セパレータ１８が順次多孔質フィルム１２から切り離されて電極セパレータアッセンブリが形成される。   As shown in FIG. 5A, the positive electrode 13 is inserted into the electrode housing portion 16 with the tab 13 a protruding from the width direction of the two porous films 12. Thereafter, as shown in FIG. 5B, the tab 13a contacts the tip of the welded portion 22b, and one of the two sides sandwiching the protruding side of the tab 13a contacts the welded portion 22a. In this state, the welded portion 22c is formed so as to contact the other side, and the bag-shaped separator 18 is formed. Further, as shown in FIGS. 5B and 5C, the positive electrode 13 is inserted into the next electrode housing portion 16 in parallel therewith. Then, as in the first embodiment, the bag-shaped separator 18 is sequentially cut from the porous film 12 to form an electrode separator assembly.

この実施形態では、第１の実施形態における（１）と同様の効果が得られる。また、製造された電極セパレータアッセンブリを次工程の電極組立体工程へ順次搬送して電極組立体を形成すれば、（３）と同様の効果が得られる。また、多孔質フィルム１２に複数の電極収容部１６を別工程で形成するため、電極収容部１６を製造する方法の自由度が大きくなる。   In this embodiment, the same effect as (1) in the first embodiment can be obtained. Further, when the manufactured electrode separator assembly is sequentially conveyed to the next electrode assembly process to form an electrode assembly, the same effect as in (3) can be obtained. Moreover, since the several electrode accommodating part 16 is formed in another process in the porous film 12, the freedom degree of the method of manufacturing the electrode accommodating part 16 becomes large.

実施形態は前記に限定されるものではなく、例えば、次のように具体化してもよい。
○ 電極セパレータアッセンブリ２０の製造方法は、２枚の帯状の多孔質絶縁材（多孔質フィルム１２）に電極の３辺と当接する位置決め部（溶着部１４ａ，１４ｂ）を形成する方法に限らない。例えば、図６（ａ）に示すように、１枚の帯状の多孔質フィルム１２をその幅方向の中心において長手方向に沿って２つに折り曲げた物を使用する。そして、図６（ｂ）に示すように、多孔質フィルム１２の長手方向と直交する状態で溶着部１４ｂを所定間隔で形成する。この場合、隣接する溶着部１４ｂと、多孔質フィルム１２の折り曲げ部１２ａが正極１３のタブ１３ａ突出側と反対側の辺と当接して位置決めを行う位置決め部を構成する。そして、溶着部１４ｂと折り曲げ部１２ａで囲繞された領域が電極収容部１６となる。正極１３は、一辺が折り曲げ部１２ａに位置決めされ、２辺が溶着部１４ｂに位置決めされた状態で電極収容部１６に収容され、タブ１３ａ突出側の辺が溶着部１４ｃと当接して位置決め固定される。 The embodiment is not limited to the above, and may be embodied as follows, for example.
The manufacturing method of the electrode separator assembly 20 is not limited to a method of forming positioning portions (welded portions 14a, 14b) that come into contact with the three sides of the electrode on two strip-shaped porous insulating materials (porous film 12). For example, as shown to Fig.6 (a), the thing which bent the sheet | seat-like porous film 12 into two along the longitudinal direction in the center of the width direction is used. And as shown in FIG.6 (b), the welding part 14b is formed in a predetermined space | interval in the state orthogonal to the longitudinal direction of the porous film 12. FIG. In this case, the adjacent welded portion 14b and the bent portion 12a of the porous film 12 are in contact with the side opposite to the protruding side of the tab 13a of the positive electrode 13 to constitute a positioning portion that performs positioning. The region surrounded by the welded portion 14 b and the bent portion 12 a becomes the electrode housing portion 16. The positive electrode 13 is accommodated in the electrode accommodating portion 16 with one side positioned at the bent portion 12a and two sides positioned at the welded portion 14b, and the side on the protruding side of the tab 13a is in contact with the welded portion 14c and positioned and fixed. The

○ 図６（ａ）に示すように、１枚の帯状の多孔質フィルム１２をその幅方向の中心において長手方向に沿って２つに折り曲げた物を使用する場合、図６（ｂ）に示すように、予め多孔質フィルム１２に多数の溶着部１４ｂを所定間隔で形成する代わりに、第１の実施形態のように順次溶着部１４ｂを形成するようにしてもよい。   ○ As shown in FIG. 6 (a), when a product obtained by bending a single strip-shaped porous film 12 into two along the longitudinal direction at the center in the width direction is shown in FIG. 6 (b). As described above, instead of forming a large number of welded portions 14b on the porous film 12 at predetermined intervals, the welded portions 14b may be formed sequentially as in the first embodiment.

○ 第２の実施形態のように、正極１３を帯状の多孔質フィルム１２の長手方向から挿入するように挿入口２１が形成されている電極収容部１６を隣接して設ける場合にも、１枚の帯状の多孔質フィルム１２をその幅方向の中心において長手方向に沿って２つに折り曲げた物を使用してもよい。例えば、図７（ａ）に示すように、２つに折り曲げた多孔質フィルム１２に所定間隔で切れ目１２ｂを幅方向全長にわたって形成する。そして、図７（ｂ）に示すように、折り曲げ部１２ａと対向する側で正極１３と当接して位置決めを行う溶着部２２ｂと、溶着部２２ｂと連続して多孔質フィルム１２の幅方向に延びる溶着部２２ａとを形成して、電極収容部１６を構成してもよい。   ○ As in the second embodiment, even when the electrode accommodating portion 16 in which the insertion port 21 is formed so as to be inserted so as to insert the positive electrode 13 from the longitudinal direction of the belt-like porous film 12 is provided as a single sheet The belt-shaped porous film 12 may be bent in two along the longitudinal direction at the center in the width direction. For example, as shown in FIG. 7A, cuts 12b are formed over the entire length in the width direction at a predetermined interval in the porous film 12 folded in two. Then, as shown in FIG. 7B, a welded portion 22b that is positioned by contacting the positive electrode 13 on the side facing the bent portion 12a, and extends in the width direction of the porous film 12 continuously with the welded portion 22b. The electrode accommodating portion 16 may be configured by forming the welded portion 22a.

○ 袋状セパレータ１８の溶着部１４ｃがタブ１３ａの基端を覆う状態で溶着されてもよい。
○ 溶着部１４ａ，１４ｂ，１４ｃは連続的に形成された物に限らず、断続的に形成されてもよい。 (Circle) the welding part 14c of the bag-shaped separator 18 may be welded in the state which covers the base end of the tab 13a.
○ The welded portions 14a, 14b, and 14c are not limited to those formed continuously, and may be formed intermittently.

○ 溶着部１４ａ，１４ｂ，１４ｃは、正極１３の位置決めができればよく、２点以上で正極１３と当接すればよい。例えば、正極１３の挿入方向に沿って形成された溶着部１４ｂの長さは、正極１３の挿入補の長さの１／３程度であってもよい。   The welding parts 14a, 14b, and 14c need only be able to position the positive electrode 13, and may be in contact with the positive electrode 13 at two or more points. For example, the length of the welded portion 14b formed along the insertion direction of the positive electrode 13 may be about 1/3 of the length of the auxiliary insertion of the positive electrode 13.

○ 正極１３を袋状セパレータ１８に収容する代わりに、負極を袋状セパレータ１８に収容してもよい。
○ 位置決め部（溶着部１４ａ，１４ｂ，１４ｃ）の形成は、２枚の多孔質フィルム１２を接合して電極（正極１３又は負極）の位置決めを行うことができればよく、ローラ（第１の溶着ローラ１１、第２の溶着ローラ１５）による熱溶着で連続的に行われる方法に限らない。例えば、熱板溶着や、接着剤を用いた接着や、レーザー溶着で形成してもよい。 O Instead of accommodating the positive electrode 13 in the bag-shaped separator 18, the negative electrode may be accommodated in the bag-shaped separator 18.
The formation of the positioning portions (welding portions 14a, 14b, 14c) is not limited as long as the two porous films 12 can be joined to position the electrode (positive electrode 13 or negative electrode), and the roller (first welding roller) 11. The method is not limited to a method that is continuously performed by heat welding using the second welding roller 15). For example, it may be formed by hot plate welding, adhesion using an adhesive, or laser welding.

○ 二つ折りにした多孔質フィルム１２を使用する場合にも、折り曲げ部１２ａに沿って溶着部１４ａを形成してもよい。
○ 帯状の多孔質絶縁材は多孔質フィルムに限らず、多孔質のセラミックシートであってもよい。この場合、位置決め部は接着剤を使用した接着で形成される。 In the case of using the porous film 12 folded in half, the welded portion 14a may be formed along the bent portion 12a.
The strip-shaped porous insulating material is not limited to a porous film, and may be a porous ceramic sheet. In this case, the positioning part is formed by adhesion using an adhesive.

○ 電極（正極１３及び負極）は、金属箔の少なくとも一方の面に活物質層が存在すればよく、金属箔の両面に活物質層を有する構成に限らず、金属箔の片面に活物質層を有する構成であってもよい。   The electrode (the positive electrode 13 and the negative electrode) is not limited to the configuration in which the active material layer is provided on both surfaces of the metal foil as long as the active material layer is present on at least one surface of the metal foil. The structure which has this may be sufficient.

○ 電極は、二次電池に限らず、例えば、電気二重層キャパシタやリチウムイオンキャパシタ等のようなキャパシタに使用してもよい。
以下の技術的思想（発明）は前記実施形態から把握できる。 The electrode is not limited to a secondary battery, and may be used for a capacitor such as an electric double layer capacitor or a lithium ion capacitor.
The following technical idea (invention) can be understood from the embodiment.

（１）帯状の多孔質絶縁材として長手方向に沿って２つに折り曲げた多孔質フィルムを使用する請求項１〜請求項３のいずれか一項に記載の電極セパレータアッセンブリの製造方法。   (1) The manufacturing method of the electrode separator assembly as described in any one of Claims 1-3 which uses the porous film bent in two along the longitudinal direction as a strip | belt-shaped porous insulating material.

１１…ローラとしての第１の溶着ローラ、１２…多孔質絶縁材としての多孔質フィルム、１３…電極としての正極、１３ａ…タブ、１４ａ，１４ｂ，１４ｃ…位置決め部としての溶着部、１５…ローラとしての第２の溶着ローラ、１６…電極収容部、１８…袋状セパレータ、２０…電極セパレータアッセンブリ。   DESCRIPTION OF SYMBOLS 11 ... 1st welding roller as a roller, 12 ... Porous film as a porous insulating material, 13 ... Positive electrode as an electrode, 13a ... Tab, 14a, 14b, 14c ... Welding part as positioning part, 15 ... Roller As a second welding roller, 16... Electrode housing portion, 18... Bag-like separator, 20.

Claims (2)

平面視矩形状の袋状セパレータに、端部にタブを有し、かつ平面視矩形状の電極が、前記電極のタブを、前記袋状セパレータから突出させた状態で収容されるとともに、前記袋状セパレータの４つの辺に形成された位置決め部で位置決め固定された電極セパレータアッセンブリの製造方法であって、
帯状の多孔質絶縁材を熱溶着することで、少なくとも前記電極の２辺と当接する前記位置決め部を形成して３辺で前記電極と当接する電極収容部を形成する電極収容部形成工程と、
前記電極収容部に前記電極を挿入する電極挿入工程と、
前記電極が挿入された状態の前記電極収容部の残りの１つの辺を接合して前記電極を前記電極収容部に固定する電極固定工程と、
前記電極収容部に前記電極が固定された後、前記袋状セパレータを前記帯状の多孔質絶縁材から切り離す袋状セパレータ切り離し工程とを備え、
前記電極収容部形成工程では、２枚が重ねられた状態の前記多孔質絶縁材を一対のローラ間において熱溶着することにより前記位置決め部を形成し、
前記一対のローラは、
前記多孔質絶縁材の幅方向に沿う方向であるローラの幅方向における一端の外周に沿って形成された環状突部と、
前記環状突部の一部に連続して前記ローラの幅方向に沿って延びるとともに、その上端が前記ローラの幅方向における他端まで延びる直線突部と、を備えることを特徴とする電極セパレータアッセンブリの製造方法。 The bag-shaped separator having a rectangular shape in plan view has a tab at the end, and the electrode having a rectangular shape in plan view is accommodated with the tab of the electrode protruding from the bag-shaped separator. A method of manufacturing an electrode separator assembly positioned and fixed by positioning portions formed on four sides of a separator,
An electrode housing portion forming step for forming the electrode housing portion that contacts the electrode on three sides by forming the positioning portion that contacts at least two sides of the electrode by thermally welding a band-shaped porous insulating material;
An electrode insertion step of inserting the electrode into the electrode accommodating portion;
An electrode fixing step of bonding the remaining one side of the electrode housing portion in a state where the electrode is inserted and fixing the electrode to the electrode housing portion;
A bag separator separating step of separating the bag separator from the band-shaped porous insulating material after the electrode is fixed to the electrode housing portion;
In the electrode housing portion forming step, the positioning portion is formed by thermally welding the porous insulating material in a state where two sheets are stacked, between a pair of rollers ,
The pair of rollers is
An annular protrusion formed along the outer periphery of one end in the width direction of the roller which is a direction along the width direction of the porous insulating material;
An electrode separator assembly comprising: a linear protrusion that extends along the width direction of the roller continuously to a part of the annular protrusion and whose upper end extends to the other end in the width direction of the roller. Manufacturing method. 隣接する前記電極収容部の間の位置決め部は同時に形成され、前記袋状セパレータ切り離し工程において前記位置決め部の中心部分で切り離される請求項１に記載の電極セパレータアッセンブリの製造方法。
The positioning portion between the electrode holding region is formed at the same time, a manufacturing method of an electrode separator assembly according to claim 1 which is separated in the bag-like separator detach process in the central portion of the positioning portion adjacent.
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