Title :
Design of a multi-level battery management system for a Cascade H-bridge energy storage system
Author :
Man Chen ; Baihua Zhang ; Yongqi Li ; Guoguang Qi ; Jianzheng Liu
Author_Institution :
Power Generation Co., China Southern Power Grid, Guangzhou, China
Abstract :
The cascade H-bridge topology is novel for the battery energy storage system (BESS). A multi-level battery management system (BMS), which contains three subsystems, is introduced. The functions and communication of each subsystem are discussed. An algorithm based on extended Kaiman filter is used for the state-of-charge (SOC) estimation in battery modules. The pack SOC is derived from those of the modules according to the current direction. To keep all cells in a balanced SOC value, a four-level balance control method is proposed. The balance for cells and modules depends on extra circuits, while that for packs and phases are accomplished by the H-bridge converters.
Keywords :
Kalman filters; battery management systems; battery storage plants; bridge circuits; cascade networks; power convertors; secondary cells; BESS; Cascade H-bridge topology; H-bridge converters; Kalman filter; SOC estimation; battery energy storage system; battery modules; four-level balance control method; multilevel battery management system; state-of-charge estimation; Batteries; Battery charge measurement; Estimation; System-on-chip; Temperature measurement; Voltage measurement; Battery energy storage system (BESS); battery management system (BMS); cell balance control; state-of-charge (SOC) estimation;
Conference_Titel :
Power and Energy Engineering Conference (APPEEC), 2014 IEEE PES Asia-Pacific
DOI :
10.1109/APPEEC.2014.7066076
