Safety assessment of wireless chargers for electric vehicles considering thermal characteristics

Abstract

Overview

This study uses advanced simulation techniques to understand the thermal effects and safety of high-power wireless chargers used in electric vehicles.

Findings

• Employment of transient finite element method and electromagnetic heat transfer theory.
• Examination of temperature distribution on different shielding plates and the specific absorption rate (SAR) during charging.
• The copper shielding plate provides better temperature management, recording 16°C lower than the aluminum plate after 1 hour of heating.
• Assessment of SAR and temperature rise in the head tissues of adults and children.
• Both SAR and thermal rise for adults and children are within ICNIRP safe limits.

Conclusion

The study confirms that the copper shielding in wireless chargers can effectively dissipate heat and limit electromagnetic exposure, ensuring the safety of both the device and nearby humans.