Research on Influence of the Electric Vehicle on Life Safety During the Wireless Charging Process

In recent years, the development of wireless charging Electric Vehicles (EV) is becoming more and more rapid, because the new energy supply mode----wireless power charging has the advantages of high space utilization, high security, more convenience, stronger user experience. The Influence of charging on life safety, as the research hotspot of EV's wireless charging, has attracted more and more attention and research at home and abroad. The electromagnetic safety evaluation in this article not only provides a theoretical foundation for the life safety analysis of EV's wireless charging, but also is conducive to the future application development. In this study, under the condition of transmission frequency and output power of 85 kHz and 11.4 kW respectively, the models of EV coil and adult body are simulated. The results of safety range and electromagnetic intensity in different positions are obtained and contrasted with International Commission for Non-Ionizing Radiation Protection (ICNIRP) standard. In order to confirm the reliability of the simulation results, we set up the experimental prototype about EV's wireless charging and do the electromagnetic exposure measurement. Finally the electromagnetic safety evaluation of EV charging system is carried out from the perspective of molecular biological experiments.

I. Introduction

Recent developments of electric vehicles are becoming increasingly popular in modern applications. Wireless power transfer (WPT) technology is used in electric vehicle charging via the inductive coupling transmitter and receiver coil. Electric vehicle's wireless charging has become an environmental-friendly transport solution, which solves the drawbacks of air, noise pollution as well as greenhouse gases resulted from traditional gasoline engine [1]-[4]. In order to promote this application more wider, its influence on life safety must be high valued. The research of impact on human body's electromagnetic safety during the wireless charging process is focus of the development of EV both at home and abroad.