POWER STORAGE ELEMENT

• Main Authors: KAWATE KENJI, ENOMOTO YUKIO
• Format: Patent
• Language: English; Japanese
• Published: 07.09.2017
• 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 make a physical load acting on an electrode body uniform while suppressing deformation or breakage of a spacer when assembled.SOLUTION: A power storage element 10 includes an electrode body 400 formed by winding an electrode plate, a container 100 for accommodating the electrode body 400, and a spacer (side spacer 700) interposed between the container 100 and the electrode body 400. The container 100 has an opening 112 in which the electrode body 400 and the spacer are inserted. The spacer includes a wall portion 710 which extends along the insertion direction for the opening 112 and covers one side portion of the electrode body 400, and a plate portion (top plate 721) extending in a direction intersecting with the insertion direction from the wall portion 710. A slit (first slit 724) opened to the side opposite to the wall portion 710 is formed in the plate portion.SELECTED DRAWING: Figure 2 【課題】組み立て時におけるスペーサの変形や破損を抑制しつつ、電極体にかかる物理的な負荷の均一化を図る。【解決手段】蓄電素子１０は、極板が巻回されてなる電極体４００と、電極体４００を収容する容器１００と、容器１００と電極体４００との間に介在するスペーサ（サイドスペーサ７００）とを備える。容器１００は、電極体４００及びスペーサが挿入される開口１１２を有する。スペーサは、開口１１２に対する挿入方向に沿って延在して電極体４００の一側部を覆う壁部７１０と、壁部７１０から是挿入方向に交差する方向に延在する板部（天板７２１）とを備える。板部には、壁部７１０とは反対側が開放したスリット（第一スリット７２４）が形成されている。【選択図】図２