US 12,241,936 B2
Methods and devices for estimating state of charge of battery, and extracting charging curve of battery
Peng Ding, Shanghai (CN); Xiao Yan, Shanghai (CN); Enhai Zhao, Shanghai (CN); Danfei Gu, Shanghai (CN); Pingchao Hao, Shanghai (CN); Pei Song, Shanghai (CN); Weikun Wu, Shanghai (CN); Xiaohua Chen, Shanghai (CN); Guopeng Zhou, Shanghai (CN); and Mingchen Jiang, Shanghai (CN)
Assigned to SHANGHAI MAKESENS ENERGY STORAGE TECHNOLOGY CO., LTD., Shanghai (CN)
Filed by SHANGHAI MAKESENS ENERGY STORAGE TECHNOLOGY CO., LTD., Shanghai (CN)
Filed on Jan. 25, 2023, as Appl. No. 18/101,218.
Claims priority of application No. 202210090929.2 (CN), filed on Jan. 26, 2022.
Prior Publication US 2023/0236252 A1, Jul. 27, 2023
Int. Cl. G01R 31/374 (2019.01); G01R 31/3828 (2019.01); H02J 7/00 (2006.01)
CPC G01R 31/374 (2019.01) [G01R 31/3828 (2019.01); H02J 7/00718 (2020.01); H02J 7/007182 (2020.01)] 13 Claims
OG exemplary drawing
 
1. A method for estimating a state of charge of a battery, comprising:
estimating a first state of charge of the battery;
determining a charging curve that conforms to a present charging scenario, wherein the present charging scenario is characterized by at least one of parameters including an ambient temperature, a charging rate, an internal resistance, a state of health, a lifespan, and an open circuit voltage of the battery; and
correcting the first state of charge according to the charging curve to obtain a final state of charge of the battery,
wherein said correcting the first state of charge according to the charging curve comprises:
determining a present charging voltage of the battery;
determining a second state of charge corresponding to the present charging voltage according to the charging curve;
determining an amount of a state of charge correction according to the second state of charge; and
correcting the first state of charge according to the amount of the state of charge correction to obtain the final state of charge of the battery.