A new zero-voltage switching equalization system for series super-capacitor string

An expatiation to analyze and verify the zero-voltage-switching (ZVS) for cell voltage equalization control in a series connected super-capacitor string is proposed in this paper. Resonant circuit is designed to achieve ZVS to reduce the switching loss in equalization circuit. Analytic results indicate that the switching losses decrease and equalization efficiency can be improved with the ZVS technology. The simulation and experimental results show that the ZVS equalization technology can achieve voltage equalization performance.