Lithium-Ion Battery Cells Voltage Equalization Using Optimized Circuit Parameters and Control Strategy

Abstract

Lithium-ion battery voltage equalization is of great importance to maximize the capacity of the whole battery pack and keep cells away from over-charge or over-discharge damage.In this paper, analysis of the working principle of the voltage equalization circuit shows that the speed of the lithium-ion battery cells voltage equalization can be accelerated with optimized circuit parameters. Look- up table control strategy is presented based on the optimized circuit. Finally, simulation analysis is performed to illustrate the validity of the circuit parameters and control strategy.