A Novel Li-ion Battery Equalizer Circuit Design Based on LC Resonant Tank

Abstract

A novel Li-ion battery string equalizer based on LC resonant tank is designed. The circuit includes switched control module, LC resonant tank and voltage peak detecting module. By detecting the voltage peak position of the capacitor in the LC resonant tank, the equalizer circuit successfully switches batteries near the zero-current point to improve the equalization efficiency. The equalizer circuit is verified by Matlab/Simulink simulation and experiment. The simulation and experimental results shows that the proposed circuit can be applied for battery equalization.