A Bidirectional DC-DC Converter with High Conversion Ratios for the Electrical Vehicle Application

In this paper, a Bidirectional DC-DC Converter (BDC) for the Electrical Vehicle (EV) application is proposed. The converter benefits the advantages of both switched-inductor and switched-capacitor converters. The proposed converter has wide voltage gain range, low voltage stress on the power switches, and common ground between the grounds of the input and output sides. In addition, synchronous rectification is utilized to achieve Zero Voltage Switching (ZVS) during turn on and turn off dead time, which enhance the efficiency of the converter. The operating principle of the converter, steady-state analysis, and all devices’ voltage and current stresses are derived. Finally, a 1 kW converter with constant high-voltage side (400V) and very low-voltage side (24V) has been designed and simulated.