Power Storage Device, Lid Body, And Lid Unit

Abstract: A power storage device according to the present invention comprises an electrode body and an exterior body that seals the electrode body. The exterior body includes: an exterior film that wraps around the electrode body such that an opening is formed; and a lid body that is placed on the opening. The electrode body includes a corner section at which an R surface is formed, the lid body includes a corner section at which an R surface is formed, and the absolute value of the difference between the radius of curvature of the corner section of the electrode body and the radius of curvature of the corner section of the lid body is 10 mm or less.

Patent Information

Application #

Filing Date

19 September 2025

Publication Number

42/2025

Publication Type

INA

Invention Field

ELECTRICAL

Status

Email

Parent Application

Applicants

DAI NIPPON PRINTING CO., LTD.

1-1, Ichigaya Kagacho 1-chome, Shinjuku-ku, Tokyo 1628001

Inventors

1. MIYASHIRO, Kae

c/o DAI NIPPON PRINTING CO., LTD., 1-1, Ichigaya Kagacho 1-chome, Shinjuku-ku, Tokyo 1628001

2. SASAKI, Miho

c/o DAI NIPPON PRINTING CO., LTD., 1-1, Ichigaya Kagacho 1-chome, Shinjuku-ku, Tokyo 1628001

3. URIU, Toshibumi

c/o DAI NIPPON PRINTING CO., LTD., 1-1, Ichigaya Kagacho 1-chome, Shinjuku-ku, Tokyo 1628001

4. KANAZAWA, Sayako

c/o DAI NIPPON PRINTING CO., LTD., 1-1, Ichigaya Kagacho 1-chome, Shinjuku-ku, Tokyo 1628001

Specification

Documents

Application Documents

#	Name	Date
1	202517089422-TRANSLATIOIN OF PRIOIRTY DOCUMENTS ETC. [19-09-2025(online)].pdf	2025-09-19
2	202517089422-STATEMENT OF UNDERTAKING (FORM 3) [19-09-2025(online)].pdf	2025-09-19
3	202517089422-REQUEST FOR EXAMINATION (FORM-18) [19-09-2025(online)].pdf	2025-09-19
4	202517089422-PROOF OF RIGHT [19-09-2025(online)].pdf	2025-09-19
5	202517089422-PRIORITY DOCUMENTS [19-09-2025(online)].pdf	2025-09-19
6	202517089422-POWER OF AUTHORITY [19-09-2025(online)].pdf	2025-09-19
7	202517089422-FORM 18 [19-09-2025(online)].pdf	2025-09-19
8	202517089422-FORM 1 [19-09-2025(online)].pdf	2025-09-19
9	202517089422-DRAWINGS [19-09-2025(online)].pdf	2025-09-19
10	202517089422-DECLARATION OF INVENTORSHIP (FORM 5) [19-09-2025(online)].pdf	2025-09-19
11	202517089422-COMPLETE SPECIFICATION [19-09-2025(online)].pdf	2025-09-19