电动汽车无线充电环境的生物电磁安全评估

In recent years, with the rapid development of research and application for electric vehicle's wireless charging,the electromagnetic safety problem of living organisms under the wireless charging environment of electric vehicles has become one of the hot spots of public concern. Based on these two angles of biological thermal and non-thermal effects from the electromagnetic radiation, the safety assessment of living organisms in the charging environment is conducted in this paper. Firstly, the key organ models of human body are designed by simulation software, and the different human postures are presented exposed to the wireless charging environment of electric vehicle: standing outside the car, sitting in the car and lying on the seat. Then the electromagnetic safety of human body is analyzed. The research suggests that,electromagnetic safety indexes of each organ under various postures basically meet the International Commission on Non-Ionizing Radiation Protection (ICNIRP) standard. Among this, the specific absorption rate(SAR)measures the thermal effect. The maximum SAR value is 4.37×10^-7 W•kg^-1, which is below 10 W•kg^-1 in safety limit. Finally, a biological experiment platform is established for the electromagnetic safety assessment system of electric vehicles. From the perspective of non-thermal effects, the biological experiments have confirmed that there is no obvious changes of life immune indexes caused by the charging environment and the results are basically within the normal reference range. The assessment in this research is conducive to the popularization of electric vehicles' wireless charging.