Design and Analysis of High Voltage Gain DC-DC Converter for Low-Voltage Fuel Cell Stack Applications in FCEV

This paper proposes a high voltage gain DC-DC converter for fuel cell electric vehicle (FCEV) to enhance cost effectiveness. The proposed high voltage gain DC-DC converter can achieve a voltage gain on the order of ten, meeting the inverter input voltage demand for motor driving even under low fuel cell (FC) stack voltage conditions. Furthermore, the efficiency of the proposed DC-DC converter is measured over 96% under maximum power condition. The operating modes and principle according to duty ratio are theoretically analyzed, and its feasibility is verified through experimental results of a 2.6kW prototype.