公开(公告)号：US20230062553A1

公开(公告)日：2023-03-02

申请号：US17760107

申请日：2021-02-19

Applicant: Panasonic Intellectual Property Management Co.,Ltd.

Inventor： KAZUMICHI SHIMIZU ,  KAZUTOSHI KOHIRA ,  SHINYA GESHI

IPC: H01M50/183 ,  H01M50/107 ,  H01M50/533 ,  H01M10/04 ,  H01M50/152

Abstract: A power storage device includes an electrode group, a case having an opening, and a sealing body. The sealing body includes an annular sealing plate, a terminal cap, and an insulating gasket. The sealing plate includes a first wall portion with a tubular shape and a flange portion extending from one end of the first wall portion outward in a radial direction of the first wall portion. The terminal cap includes a cover portion with a plate shape and a crimp portion connected with a periphery of the cover portion. The cover portion closes an opening of the first wall portion surrounded by another end of the first wall portion. The gasket includes a second wall portion with a tubular shape facing an outer peripheral surface of the first wall portion and an annular base disposed between the cover portion and the another end of the first wall portion. The crimp portion includes a third wall portion with a tubular shape surrounding at least a part of the second wall portion. The third wall portion compress the second wall portion. A peripheral portion of the sealing plate is joined to an opening end portion of the case.