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Patent Searching and Data


Title:
END COVER ASSEMBLY, SECONDARY BATTERY, BATTERY MODULE, DEVICE, LIQUID INJECTION METHOD AND DEVICE
Document Type and Number:
WIPO Patent Application WO/2021/232252
Kind Code:
A1
Abstract:
An end cover assembly (40), a secondary battery (30), a battery module (20), a device, a liquid injection method and device. The end cover assembly (40) is used for the secondary battery (30) and comprises: an end cover (50) provided with a through hole (50a) for injecting electrolyte, and the end cover (50) has a connecting portion (51); a sealing assembly (60) for sealing the through hole (50a); and a locking member (70) which is configured to be movable relative to the connecting portion (51) in the radial direction of the through hole (50a) so as to realize the switch between the locking member (70) and the connecting portion (51) in a locking state and an unlocking state; and in the locking state, the locking member (70) abuts against the sealing assembly (60) to limit separation of the end cover (50) from the sealing assembly (60). In the unlocking state, the end cover (50) is separable from the sealing assembly (60) to allow the electrolyte to be injected from the through hole (50a). After the secondary battery (30) is assembled, the electrolyte can be supplemented again, so that the service life of the secondary battery (30) is effectively prolonged.

Inventors:
CAI, Qichang (CN)
XING, Chengyou (CN)
ZHONG, Libin (CN)
CHEN, Wenwei (CN)
LI, Quankun (CN)
WANG, Peng (CN)
Application Number:
PCT/CN2020/091108
Publication Date:
November 25, 2021
Filing Date:
May 19, 2020
Export Citation:
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Assignee:
CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED (CN)
International Classes:
H01M50/60
Attorney, Agent or Firm:
BEIJING EAST IP LTD. (CN)
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