Design and Control of an EV Charging Station Based on Single-Stage Operation for 800 V EVs

Abstract

This study investigates the design and control of an electric vehicle (EV) charging station based on single-stage operation for the increasing number of 800 V EVs. The proposed system ensures high-power and high-efficiency charging of 800 V EVs, including an input-side low-frequency transformer, inductance-capacitance-inductance (LCL) filter, and three-level neutral-point clamped (T-NPC) converter that performs grid-side power-factor correction and real-time charging control of a vehicle. In addition, a vehicle-to-everything (V2X) function is implemented to enable power transfer from the vehicle to external systems through the bidirectionality of the T-NPC converter. The proposed system is validated through unit experiments and real battery experiments.