Bio-Electromagnetic Safety Assessment of Wireless Charging Environment for Electric Vehicles

Authors: Zheng H, Zhao X

Year: 2024

Category: Electromagnetic Safety Assessment

Journal: Progress In Electromagnetics Research Letters

DOI: 10.2528/PIERL24081306

URL: https://www.jpier.org/issues/volume.html?paper=24081306

Abstract

Overview

Wireless power charging technology for electric vehicles has rapidly advanced and is widely adopted due to its many advantages over traditional plug-in charging methods. However, the electromagnetic bio-safety implications for humans in these charging environments have raised public concern.

Methodology

  • Finite element analysis was used to assess electromagnetic safety for key human organs in a typical electric vehicle wireless charging environment.
  • Human-vehicle models were built in COMSOL to simulate various postures.
  • The study analyzed spatial electromagnetic field distribution in critical organs during a 7.7 kW, 85 kHz charging scenario.
  • Organ-specific electromagnetic radiation doses were calculated and compared with ICNIRP guidelines.

Findings

  • The electromagnetic radiation dose to different organs depends on both organ electromagnetic properties and their positions.
  • When an individual is lying flat in the car, organ exposure to electromagnetic radiation is at its maximum.

Conclusion

Even under conditions of maximum exposure, each organ's radiation dose stays significantly below ICNIRP standards in a low-power (7.7 kW, 85 kHz) wireless charging environment. These results support the safety and broader adoption of wireless charging for electric vehicles. However, continuous monitoring and adherence to exposure standards remain essential, as electromagnetic fields have established connections to health risks.

wireless charging electric vehicles electromagnetic fields bio-safety organ exposure finite element analysis ICNIRP standards
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