Mobile QR Code QR CODE : The Korean Institute of Power Electronics
Title A 3.3kW Bi-directional EV Charger with V2G and V2H function
Authors Se-Hyung Jung ; Seok-Yong Hong ; Jun-Sung Park ; Se-Wan Choi
DOI 10.6113/TKPE/2015.20.1.31
Page pp.31-37
ISSN 1229-2214
Keywords EV(Electric Vehicle); V2G(Vehicle to Grid); V2H(Vehicle to Home); Bi-directional battery charger; ZCS(Zero Current Switching); SRC(Series Resonant Converter)
Abstract This paper proposes a 3.3-kW bi-directional EV charger with V2G and V2H functions. The bi-directional EV charger consists of a DC-DC converter and a DC-AC inverter. The proposed EV charger is suitable for wide battery voltage control due to the two-stage configuration of the DC-DC converter. By employing a fixed-frequency series loaded resonant converter as the isolated DC-DC converter, zero-current-switching can be achieved regardless of battery voltage variation, load variation, and power flow. A 3.3-kW prototype of the proposed EV charger has been built and verified with experiments, and indicates a maximum efficiency of 94.39% and rated efficiency of 94.23%.