High-Power Three-Port Converter for Efficient EV Fast Charging Using Partial Power Processing

The market for battery-powered electric vehicles (EVs) has experienced significant growth, driving the demand for efficient fast-charging infrastructure. This paper presents a high-power, three-port converter designed for EV fast charging, utilizing Partial Power Processing (PPP) to enhance overall efficiency. The proposed converter features two input ports connected to the grid and a battery system, and one output port dedicated to fast charging. A key feature of this converter is the direct connection between the battery and the charging port, allowing for improved power transfer capabilities. Additionally, a series resonant converter (SRC) is employed to enable unidirectional fast charging, optimizing the converter's performance for high-power applications. Through a series of simulations, the converter's efficiency and power-handling capabilities were analyzed, confirming its ability to significantly reduce power losses while ensuring reliable and efficient fast charging. The results demonstrate the converter's potential to meet the growing demands of EV infrastructure by improving power density, lowering system costs, and maintaining essential isolation between the grid and the vehicle.