Design and Analysis of LLC Resonant Converter for Electric Vehicle Battery Charging

In order to achieve wide input range, minimal switching losses, and stable performance designing of resonant converters are required. This paper suggests effective methodology of battery charging using resonant converter. Resonant power converters have become quite popular recently in applications requiring solid-state transformers, solar PV fed electric vehicle (EV) charging infrastructures, etc. An LLC DC/DC resonant converter is designed and proposed in this paper for the utilization of battery charging. The battery is charged using closed loop constant current charging technique. This approach indicates the requirements of fine-tuning of PI controller for constant current application, which is used for EV battery charging application.