Ripple-Free Bidirectional DC-DC Converter With Wide ZVS Range for Battery Charging/Discharging System. - Zhixing Yan; Jie Li 096; Shikai Xu; Ningrui Yang; Jun Zeng 004; Junfeng Liu 002; Weibin Wu 001; Renjun Hu; Haixia Qi (IEEE Trans. Ind. Electron., 2023)