Abstract
In this paper, a review of LLC resonant converter topologies for EV/HEV battery charging applications is presented. The increasing demand for efficient and fast charging requires converters that can handle wide input voltage ranges with high efficiency. The dual-bridge LLC resonant converter with fixed-frequency PWM control is highlighted for its improved performance and soft-switching capability (ZVS/ZCS), which reduces losses. The study also discusses the integration of renewable energy sources, such as photovoltaic systems, with grid supply for hybrid charging. Overall, the reviewed methods provide better efficiency, power density, and reliability, making them suitable for modern EV charging systems.