公开(公告)号：US20230155260A1

公开(公告)日：2023-05-18

申请号：US17798192

申请日：2021-02-05

Applicant: DAI NIPPON PRINTING CO., LTD.

Inventor： Miho SASAKI ,  Shinichi MIKAMI ,  Wakako SENTOU ,  Kiyoshi NAKADA ,  Jun FUKUDA ,  Atsushi SAITOU

IPC: H01M50/566 ,  H01M50/186 ,  H01M50/171

CPC classification number: H01M50/566 ,  H01M50/171 ,  H01M50/186

Abstract: An energy storage device includes an electrode body and an outer packaging. The outer packaging seals the electrode body. The outer packaging is constituted by a film-like outer packaging member. The outer packaging includes a first sealing portion sealed by joining surfaces that face each other in a state in which the outer packaging member is wrapped around the electrode body. A base portion of the first sealing portion is formed at the boundary between a first surface and a second surface of the outer packaging. The first surface has a larger area than the second surface. The first sealing portion does not overlap the first surface in a plan view.