A Three-Port Bidirectional DC-DC Converter with G2V and V2G Power Flow Capabilities

The rapid adoption of electric vehicles (EVs) and renewable energy sources has increased the need for compact and efficient power electronic interfaces capable of managing multiple energy sources with bidirectional power flow. Conventional EV charging systems use separate converters for PV generation, battery storage, and grid interfacing, leading to higher cost, losses, and complexity. This work presents a battery-integrated three-port bidirectional DC–DC converter for light electric vehicles with grid-to-vehicle (G2V) and vehicle-to-grid (V2G) capability. The proposed non-isolated topology integrates PV, battery, and a low-voltage DC grid in a single converter. MATLAB/Simulink simulations validate multiple operating modes, stable DC bus regulation, and seamless bidirectional power transfer, offering an efficient solution for PV-assisted EV charging applications.