POWER STORAGE ELEMENT

• Main Author: HIRANO SHINSUKE
• Format: Patent
• Language: English; Japanese
• Published: 18.01.2018
• 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

PROBLEM TO BE SOLVED: To suppress electrode sheets and a separator for constituting an electrode body of a power storage element from being folded/bent in a zig-zag like form.SOLUTION: A power storage element (1) according to the present invention comprises: an electrode body (20) having a first electrode sheet (21), a second electrode sheet (22), and a separator (23) individually arranged in parallel with a first direction (D1), of which the first and second electrode sheets are laminated over each other with the separator disposed therebetween in a second direction (D2) at right angles to the first direction; an outer packaging body (2) in which the electrode body is encased; and spacers (41, 42) interposed between the electrode body and inner faces of the outer packaging body. The spacers (41, 42) are disposed outside the electrode body (20) and opposed to each other in the second direction (D2), and have thrusting portions (51, 52, 55, 56) arranged so that each gradually thrusts inwardly in the second direction (D2) toward a leading end in the first direction (D1). In the electrode body (20), end faces (20a, 20b) in the first direction (D1) each front on a space (S1, S2).SELECTED DRAWING: Figure 6 【課題】蓄電素子の電極体を構成する電極シート及びセパレータのジグザグ状の折れ曲がりを抑制する。【解決手段】本発明に係る蓄電素子（１）は、第１電極シート（２１）、第２電極シート（２２）及びセパレータ（２３）が、それぞれ第１方向（Ｄ１）に平行に配置され、第１電極シートと第２電極シートとが、セパレータを介して第１方向に直角な第２方向（Ｄ２）に相互に積層された電極体（２０）と、電極体を収容する外装体（２）と、電極体と外装体の内面との間に介在するスペーサ（４１，４２）とを備え、スペーサ（４１，４２）は、第２方向（Ｄ２）において電極体（２０）の外側に対向配置され、第１方向（Ｄ１）の先端に向かって次第に第２方向（Ｄ２）の内側へ張り出す張り出し部（５１，５２，５５，５６）を有し、電極体（２０）における第１方向（Ｄ１）の端面（２０ａ，２０ｂ）は空間（Ｓ１，Ｓ２）に対面している。【選択図】図６