US 11,946,893 B2
Method, apparatus, electronic device and storage medium for detecting water content in battery
Xinyong Tan, Ningde (CN); Zhaoyang Wu, Ningde (CN); Huihua Dong, Ningde (CN); and Weihai Yang, Ningde (CN)
Assigned to CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED, Ningde (CN)
Filed by CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED, Ningde (CN)
Filed on Jul. 6, 2023, as Appl. No. 18/347,868.
Application 18/347,868 is a continuation of application No. PCT/CN2022/090528, filed on Apr. 29, 2022.
Prior Publication US 2023/0349854 A1, Nov. 2, 2023
Int. Cl. G01N 27/22 (2006.01); G01R 31/364 (2019.01); G01R 31/389 (2019.01); H01M 10/42 (2006.01)
CPC G01N 27/223 (2013.01) [G01R 31/364 (2019.01); G01R 31/389 (2019.01); H01M 10/4285 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A method for determining water content in a battery, comprising:
obtaining a capacitance detection value of the battery; and
determining a first water content value of the battery according to the capacitance detection value and a capacitance-water content relationship model;
wherein the capacitance-water content relationship model is constructed according to corresponding relationships between sample batteries with different water content values and their respective sample capacitance values; and
wherein obtaining the capacitance detection value of the battery comprises:
after determining that the battery reaches a detection position, connecting a detection probe to positive and negative electrodes of the battery;
applying an alternating current with a constant voltage to the battery through the detection probe, and measuring a capacitive reactance value of the battery; and
obtaining the capacitance detection value of the battery according to the capacitive reactance value of the battery.