SECONDARY BATTERY AND LITHIUM SUPPLEMENTING METHOD THEREFOR, BATTERY MODULE, BATTERY PACK, AND ELECTRIC DEVICE

WIPO Patent Application WO/2023/077266

A1

The present application provides a secondary battery and a lithium supplementing method therefor, a battery module, a battery pack, and an electric device. The secondary battery comprises a housing, an end cover assembly, and an electrode assembly, the housing has an opening, the end cover assembly is used for sealing the opening of the housing, and the electrode assembly is packaged in the housing and comprises a positive pole piece and a negative pole piece. The end cover assembly is provided with a first electrode terminal, a second electrode terminal, and a third electrode terminal, and the electrode assembly is electrically connected to the first electrode terminal and the second electrode terminal. The secondary battery further comprises a lithium source, the lithium source is provided on the inner side of the housing and is electrically connected to the third electrode terminal, and the lithium source comprises a lithium metal layer and a metal carrier that is located between the lithium metal layer and the housing and that is used for supporting the lithium metal layer. The present application can accurately control the lithium supplementing rate and the lithium supplementing amount of the secondary battery, and greatly improve the cyclic performance and the storage performance of the secondary battery.

YANG LONGFEI (CN)
YANG LIMEI (CN)
LIU JIANG (CN)
LIU XIAOMEI (CN)

PCT/CN2021/128178

May 11, 2023

November 02, 2021

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CONTEMPORARY AMPEREX TECHNOLOGY CO LTD (CN)

H01M10/0525

CN108539124A	2018-09-14
CN107845829A	2018-03-27
CN109728365A	2019-05-07
CN111081982A	2020-04-28

BEIJING EAST IP LTD. (CN)

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