MANUFACTURING METHOD FOR ELECTRODE

• Main Author: YAMAUCHI KAZUTERU
• Format: Patent
• Language: English; Japanese
• Published: 30.05.2016
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

PROBLEM TO BE SOLVED: To provide a method of manufacturing an electrode that can perform both of prevention of occurrence of burr and enhancement of productivity in a process of cutting an electrode sheet having an active material coated portion at which metal foil is coated with an electrode active material and an active material non-coated portion at which no electrode active material is coated.SOLUTION: In an electrode manufacturing method for cutting an electrode sheet 60 having an active material coated portion at which metal foil for an electrode is coated with active material and an active material non-coated portion at which no active material is coated, non-coated portion cutting scheduled portions 75 to 78 which are scheduled to be cut are set in the active material non-coated portion, and plural electrode sheets 60 are stacked, thereby forming an electrode sheet group 83 in which the non-coated portion cutting scheduled portions 75 to 78 of the electrode sheets 60 are superimposed, and a high hardness coating body which has higher hardness than the metal foil for the electrode and covers the non-coated portion cutting scheduled portion of the electrode sheet 60 at the outermost position in the electrode sheet group 83. The non-coated portion cutting scheduled portions 75 to 78 covered by the high hardness coating body are cut.SELECTED DRAWING: Figure 4 【課題】金属箔に電極活物質が塗布された活物質塗工部と電極活物質が塗布されていない活物質非塗工部とを備える電極シートを切断する際、バリ発生防止と生産性の向上とを両立できる電極の製造方法を提供することができる。【解決手段】電極用金属箔に活物質が塗布された活物質塗工部と活物質が塗布されていない活物質非塗工部とを備える電極シート６０を切断する電極の製造方法において、活物質非塗工部に切断が予定される非塗工部切断予定部７５〜７８を設定し、複数の電極シート６０を積み重ねることにより、電極シート６０の非塗工部切断予定部７５〜７８が重畳される電極シート群８３と、電極用金属箔よりも高い硬度を有し、電極シート群８３において最も外側に位置する電極シート６０の非塗工部切断予定部を覆う高硬度被覆体とを形成し、高硬度被覆体により覆われる非塗工部切断予定部７５〜７８を切断する。【選択図】 図４