US 11,721,994 B2
Method and system for optimizing charging and discharging behaviors of a battery energy storage system based on state of health
Kaile Zhou, Anhui (CN); Zenghui Zhang, Anhui (CN); Shanlin Yang, Anhui (CN); Jianling Jiao, Anhui (CN); and Xinhui Lu, Anhui (CN)
Assigned to Hefei University of Technology, Hefei (CN)
Filed by Hefei University of Technology, Anhui (CN)
Filed on Apr. 14, 2021, as Appl. No. 17/230,952.
Claims priority of application No. 202110183907.6 (CN), filed on Feb. 10, 2021.
Prior Publication US 2021/0234387 A1, Jul. 29, 2021
Int. Cl. H02J 7/00 (2006.01); G01R 31/392 (2019.01); G01R 31/382 (2019.01)
CPC H02J 7/0048 (2020.01) [G01R 31/382 (2019.01); G01R 31/392 (2019.01); H02J 7/005 (2020.01)] 10 Claims
OG exemplary drawing
 
1. A method for optimizing charging and discharging behaviors of a battery energy storage system (BESS) based on a state of health (SOH), comprising:
determining an output power of the BESS based on electric power data; and
obtaining a curve of a state of charge (SOC) of each of battery packs based on the output power of the BESS;
obtaining the number of cycles of each of the battery packs and depths of discharge (DODs) corresponding to the cycles of each of the battery packs based on the curve of the SOC of each of the battery packs;
obtaining the SOH of each of the battery packs based on the number of cycles of each of the battery packs and the DODs corresponding to the cycles of each of the battery packs;
obtaining a charging index sequence and a discharging index sequence of the battery packs based on the SOH, the SOC and a charging and discharging state of each of the battery packs;
determining optimal number of charging and discharging battery packs and DODs corresponding to the battery packs based on the number of cycles of each of the battery packs and the DODs corresponding to the cycles of each of the battery packs; and
carrying out charging and discharging tasks according to the charging index sequence and the discharging index sequence based on the optimal number of the charging and discharging battery packs and the DODs corresponding to the charging and discharging battery packs.