Title:
END COVER, BATTERY CELL, BATTERY AND ELECTRIC DEVICE
Document Type and Number:
WIPO Patent Application WO/2023/221464
Kind Code:
A1
Abstract:
Provided in the embodiments of the present application are an end cover, a battery cell, a battery and an electric device, belonging to the technical field of batteries. The end cover comprises a cover body and a groove. The cover body is provided with a first surface. The groove is formed in the cover body, so that a pressure relief area is formed in the area, provided with the groove, of the cover body, the groove is sunken in the thickness direction of the cover body from the first surface, and a groove side surface of the groove comprises a corner surface located at the corner position of the groove. The corner surface is connected to the first surface by means of a first chamfer surface. Because of the arrangement of the first chamfer surface, the strength of the pressure relief area at the corner position of the groove is weakened, the strength of the pressure relief area at the corner and the edge position of the groove is homogenized, the risk of local stress concentration in the pressure relief area is reduced, the pressure relief area can be well protected, and the impact resistance of the end cover is improved.
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Inventors:
ZHOU WENLIN (CN)
XU LIANGFAN (CN)
LI QUANKUN (CN)
WANG PENG (CN)
XU LIANGFAN (CN)
LI QUANKUN (CN)
WANG PENG (CN)
Application Number:
PCT/CN2022/137556
Publication Date:
November 23, 2023
Filing Date:
December 08, 2022
Export Citation:
Assignee:
CONTEMPORARY AMPEREX TECHNOLOGY CO LTD (CN)
International Classes:
H01M50/147
Foreign References:
| CN217507493U | 2022-09-27 | |||
| CN216288669U | 2022-04-12 | |||
| CN215911484U | 2022-02-25 | |||
| CN213304257U | 2021-05-28 | |||
| CN113270962A | 2021-08-17 | |||
| CN109216638A | 2019-01-15 |
Attorney, Agent or Firm:
BEIJING WEIFEI LIANCHUANG INTELLECTUAL PROPERTY AGENCY CO., LTD. (CN)
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