96.48% Peak-Efficiency Continuous-Current Step-Up Battery Charger (CC-SUBC) with Dual Energy-Harvesting Sources for Automotive Application

초록

This paper proposes a continuous-current step-up battery charger (CC-SUBC) for electronic or hybrid vehicles. The proposed charger can simultaneously extract power from dual energy harvesting sources (VPV and VTEG), of which voltages are lower than the output battery voltage (VBAT). In addition, the CC-SUBC charges the battery with a continuous output current (IO) although it operates as a step-up converter. Peak efficiency was obtained as 96.48%, which is not only the highest peak efficiency but also the largest maximum output power among the state-of-the-art step-up converters. © 2023 JSAP.