US 11,899,071 B2
Method and apparatus for determining state of charge of battery, management system and storage medium
Mingshu Du, Ningde (CN); Shichao Li, Ningde (CN); Shenzhi Tang, Ningde (CN); Jian Ruan, Ningde (CN); Yanhua Lu, Ningde (CN); and Wei Zhang, Ningde (CN)
Assigned to Contemporary Amperex Technology Co., Limited, Ningde (CN)
Appl. No. 17/053,151
Filed by Contemporary Amperex Technology Co., Limited, Ningde (CN)
PCT Filed Jun. 17, 2020, PCT No. PCT/CN2020/096438
§ 371(c)(1), (2) Date Nov. 5, 2020,
PCT Pub. No. WO2020/259355, PCT Pub. Date Dec. 30, 2020.
Claims priority of application No. 201910548061.4 (CN), filed on Jun. 24, 2019.
Prior Publication US 2023/0095453 A1, Mar. 30, 2023
Int. Cl. G01R 31/3842 (2019.01); G01R 31/367 (2019.01); G01R 19/165 (2006.01)
CPC G01R 31/3842 (2019.01) [G01R 19/1659 (2013.01); G01R 31/367 (2019.01)] 14 Claims
OG exemplary drawing
 
1. A method for determining a state of charge of a battery, comprising:
obtaining a current OCV value of a battery;
obtaining cumulative continuous charging capacity information of the battery;
obtaining SOC credible information based on the current OCV value and the cumulative continuous charging capacity information, the SOC credible information includes an SOC upper limit and an SOC lower limit;
obtaining an initial SOC value corresponding to the current OCV value;
correcting the initial SOC value to the SOC upper limit if the initial SOC value is greater than the SOC upper limit.