BATTERY AND MANUFACTURING METHOD OF THE BATTERY

• Main Authors: ITO RYUJI, MANO TSUKASA, HANAMURA REI, OCHIAI YUKI
• Format: Patent
• Language: English; Japanese
• Published: 05.08.2022
• Subjects: BASIC ELECTRIC ELEMENTS; CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES ORLIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

To realize a battery capable of suppressing a short circuit of a terminal of a battery element and a metal layer of an exterior coating film.SOLUTION: A battery 1A comprises: a battery element 10; and an exterior coating body 20A. The battery element 10 includes: a positive electrode layer 11 and a negative electrode layer 12 which are opposite; and a positive electrode tub 14 and a negative electrode tub 15 which are connected each other. The exterior coating body 20A is formed by an exterior coating film 20 packing the battery element 10 so that the positive electrode tub 14 and the negative electrode tub 15 are projected. The exterior coating film 20 includes: an insulation layer 22 and an insulation layer 23 which are opposite; and a metal layer 21 interposed between them. In an end surface 20a on the side where the positive electrode tub 14 and the negative electrode tub 15 are projected, the metal layer 21 is positioned at an inner side from the insulation layers 22 and 23. Thus, if both or one of the positive electrode tub 14 and the negative electrode tub 15 are/is bent, they can be prevented from being in a short circuit due to the contact with the metal layer 21 of the exterior coating film 20.SELECTED DRAWING: Figure 9 【課題】電池素子の端子と外装フィルムの金属層との短絡を抑えることのできる電池を実現する。【解決手段】電池１Ａは、電池素子１０及び外装体２０Ａを備える。電池素子１０は、対向する正極層１１及び負極層１２と、それらにそれぞれ接続される正極タブ１４及び負極タブ１５とを有する。外装体２０Ａは、正極タブ１４及び負極タブ１５が突出するように電池素子１０を包む外装フィルム２０により形成される。外装フィルム２０は、対向する絶縁層２２及び絶縁層２３と、それらの間に介在される金属層２１とを有し、正極タブ１４及び負極タブ１５が突出する側の端面２０ａにおいて、金属層２１が、絶縁層２２及び絶縁層２３よりも内側に位置する。これにより、正極タブ１４及び負極タブ１５の双方又は一方が折り曲げられても、それらが外装フィルム２０の金属層２１と接触して短絡することが抑えられる。【選択図】図９