Journal of Electrical Engineering and Automation

The echelon utilization of spent lithium - ion batteries is a research hotspot in the field of energy recovery and energy storage. Aiming at the problem of unbalanced voltage of battery cells in the process of echelon utilization of lithium - ion batteries, this paper proposes a design scheme of battery management system (BMS) based on active equalization technology. Through real - time monitoring and regulation of the voltage of battery cells, the equalization circuit is used to effectively eliminate the unbalanced state in the battery pack, thereby prolonging the service life of the battery pack and improving the energy utilization rate. On the premise of ensuring the safety and stability of the battery, this scheme can maximize the overall performance of the echelon - used battery, which has important practical application value. The experimental results show that the designed BMS can significantly improve the efficiency and stability of the battery pack.

Echelon utilization; Lithium - ion battery; Active equalization; Battery management system (BMS); Voltage equalization