A Novel Quadruple Active Bridge DC Converter With Reduced Inductor Current for EV Battery Charging

Abstract

A bidirectional DC-DC converter can diminish the uncertainty of PV generation and enhance system reliability when integrated with energy storage systems. Usually, a Dual Active Bridge (DAB) con- verter with soft switching capability essentially matches the needs of an energy storage system. The DAB not able to reduce the inductor current stress when load is increased, and thus, the efficiency is decreased. To address this issue, we present a novel Quadruple Active Bridge (QAB) converter. In terms of enhancing the efficiency along with mitigating the current stress on the Low Voltage (LV) side, the LLC resonant con- verter with a constant pulse width modulation scheme was implemented. Finally, the QAB-LLC converter fed with Electric Vehicle’s (EV’s) Battery has been veri- fied in MATLAB/Simulink and it results in a maxi- mum State of Charge (SOC) and, maximum voltage capability which provides a high efficiency along with minimum inductor current stress on LV side.