Assessment of Electromagnetic Exposure Levels for Humans from Electric Vehicle DC Charging Stations

Area of Science:

• Biophysics
• Electromagnetic Compatibility
• Public Health

Background:

• DC charging piles are essential for electric vehicles.
• Concerns exist regarding potential health risks from electromagnetic field (EMF) exposure.
• Quantifying EMF exposure is crucial for safety assessments.

Purpose of the Study:

• To investigate the potential health risks of DC charging piles by quantifying internal electromagnetic exposure levels.
• To assess EMF exposure in adult and child models under realistic charging scenarios.
• To compare calculated exposure levels with international safety guidelines.

Main Methods:

• A simulation model of a DC charging pile, vehicle, and transformer was created using COMSOL Multiphysics.
• Magnetic induction (B-field) and electric field (E-field) intensities were calculated for adult and child models at various distances.
• Exposure levels were analyzed at different frequencies and for in-vehicle occupants.

Main Results:

• Peak B-field and E-field exposures for adults and children near the charging pile were significantly below ICNIRP occupational and public limits.
• EMF levels for in-vehicle occupants were also found to be far below safety standards.
• B-field decreased with increasing frequency, while E-field showed minimal variation due to shielding.

Conclusions:

• Electromagnetic exposure from DC charging piles complies with safety standards.
• DC charging piles pose no threat to human health under normal operating conditions.
• The study provides a scientific basis to alleviate public concerns regarding EMF health risks.