US 12,455,326 B2
Method and apparatus for detecting lithium plating, and method and apparatus for obtaining polarization proportion
Shifei Yuan, Shenzhen (CN); Bingxiao Liu, Shanghai (CN); and Zhiwei Wu, Shanghai (CN)
Assigned to Shenzhen Yinwang Intelligent Technologies Co., Ltd., Shenzhen (CN)
Filed by SHENZHEN YINWANG INTELLIGENT TECHNOLOGIES CO., LTD., Shenzhen (CN)
Filed on Oct. 28, 2022, as Appl. No. 17/976,402.
Application 17/976,402 is a continuation of application No. PCT/CN2020/088503, filed on Apr. 30, 2020.
Prior Publication US 2023/0052544 A1, Feb. 16, 2023
Int. Cl. G01R 31/396 (2019.01); G01R 31/364 (2019.01); G01R 31/388 (2019.01); H01M 10/42 (2006.01); H01M 10/44 (2006.01)
CPC G01R 31/396 (2019.01) [G01R 31/364 (2019.01); G01R 31/388 (2019.01); H01M 10/4285 (2013.01); H01M 10/44 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method, comprising:
obtaining an open-circuit voltage of a rechargeable battery and a negative electrode open-circuit voltage of the rechargeable battery based on a state of charge of the rechargeable battery;
obtaining a negative electrode polarization voltage of the rechargeable battery based on the open-circuit voltage of the rechargeable battery, a terminal voltage of the rechargeable battery, and a polarization proportion of the rechargeable battery, wherein the polarization proportion of the rechargeable battery represents a proportion that is of the negative electrode polarization voltage of the rechargeable battery to a polarization voltage of the rechargeable battery and that is obtained when the rechargeable battery is at a lithium plating critical point;
obtaining a negative electrode voltage of the rechargeable battery based on the negative electrode open-circuit voltage of the rechargeable battery and the negative electrode polarization voltage of the rechargeable battery; and
determining, based on the negative electrode voltage of the rechargeable battery, whether lithium plating occurs in the rechargeable battery.