A Multifunctional Integrated Onboard Battery Charger for Plug-in Electric Vehicles (PEVs)

Abstract

This paper proposes a CuK converter based integrated battery charger for plug-in electric vehicles (PEVs), Proposed bidirectional DC/DC converter is capable of performing buck/boost function during all modes of vehicle operation. It operates as a power factor correction (PFC) converter during plug-in charging mode, and as conventional single stage inverting buck/boost converter in driving and regenerative braking modes. Selection of a wide range of battery voltages and adequate control over braking can be achieved with the proposed multi-functional converter. In addition, size, weight and cost of the charger are also reduced, as it involves minimum number of components compared to existing buck/boost converters used in chargers. The proposed converter is highly suitable for onboard charger of PEVs. Simulation are performed on MATLAB/Simulink environment and a laboratory prototype of the aforementioned converter has been built to validate its feasibility.