Interleaved Boost Converter (IBC) based fast EV charging system: Design and Simulation

Transportation system is considered to be one of the most important aspect for a developing nation irrespective of its mode (road, railway, air, and water). The development is more appreciated when it will be in collaboration with nature. Electrification in transportation system is a promising area where various problems of existing transportation system were addressed such as less noise, reduce the import of petroleum products and improve the quality of air. The main problem with electric transportation (mainly electric vehicles) is overnight charging. To meet this, different types of fast chargers were designed and developed in last couple of years based on fundamental converter topologies such as: phase shift full bridge (PSFB) converters, LLC resonant converter, dual active bridge (DAB) converter, CLLC converters, and DC-DC boost converters. However, various limitations of the existing converters such as: high switching losses, large inductor size and high electromagnetic interference have motivated researchers to develop novel converter topology. The interleaved boost converter (IBC) based power electronic circuits are finding huge application in fast charging of EVs because of many advantages over fundamental boost converters in terms of low ripples in input current and output voltage, high efficiency, and low switching losses. In this research article, an IBC based 26kW fast charging system for EV is designed and simulated in MATLAB environment. Mathematical analysis of IBC in various modes of operation along with design parameters are well explained. A Nissan leaf 2013 model battery pack specifications where considered for simulation. Further, proportional integral (PI) controllers are applied to control EV battery parameters in constant current (CC) mode and constant voltage (CV) mode depending upon the state of charge (SOC) of EV battery.