From wired to in-moving charging of the electric vehicles

In present years, the deployment of electric vehicles is arisen globally due to the stressing of the environmental concerns and the demand of energy-efficient road transportation. This paper deals with the battery charging technologies for electric vehicles, giving an overview on their evolutionary process. At first, the wired technology is reviewed and the main existing standards on it (charging modes, connection cases and plug types) are presented. Then the wireless power transfer technology is illustrated, showing the convenience of the resonant coupling topologies in increasing the power transfer efficiency. At last, the in-moving technology is introduced and the preliminary studies on it are addressed.