Prototype Development of a PV–Battery Integrated LLC Resonant Converter for Inductive Wireless EV Charging Stations

ABSTRACT: This project presents the design and experimental implementation of a smart wireless electric vehicle (EV) charging system using inductive coupling wireless power transfer (ICWPT). The proposed system integrates a PV–battery energy storage source, an LLC resonant converter, and IoT-based monitoring into a single wireless EV charging prototype. High-frequency AC power generated by the LLC converter is transferred through inductive coupling, and the received power is rectified to charge a DC load representing an EV battery. A Node MCU microcontroller is employed to monitor battery parameters, and the Blynk IoT application is used to display the realtime EV battery charging percentage, enabling smart grid–oriented remote supervision. The novelty of this work lies in the practical integration of renewable energy–assisted ICWPT with an LLC resonant converter and real-time IoT monitoring, which is rarely demonstrated together in laboratory-scale EV charging implementations. A 12 V, 5 W experimental model is implemented and tested for varying coil separation distances, demonstrating stable wireless charging and effective remote monitoring. This implementation validates a cost-effective, scalable, and smart wireless EV charging approach suitable for future smart grid applications