Research uncovers electric car fast chargers as potential hidden sources of air pollution

Fast-Charging Stations for Electric Vehicles May Contribute to Air Pollution

A new study, reported by Automotive News, has found that fast-charging stations for electric vehicles, particularly those with direct current (DC), could be a significant source of airborne particles. The analysis focused exclusively on non-exhaust emissions, i.e., those not caused by the operation of vehicle engines.

Researchers took air quality measurements at 50 fast-charging stations in Los Angeles County, including Tesla Supercharger locations. The findings revealed that almost half of the charging points surveyed exceeded the air quality guidelines of the World Health Organization (WHO).

The measured concentration of fine dust particles averaged 15.2 micrograms per cubic meter, slightly higher than at gas stations and significantly above the values in city parks. This higher concentration of fine dust particles at fast-charging stations compared to city parks and gas stations is a potential concern for air quality.

The researchers attribute the measured air pollution at fast-charging stations primarily to the fans in power distributors of charging columns. These fans are necessary for cooling the technology but can unintentionally stir up particles, contributing to air pollution.

However, it's worth noting that the study did not address emissions caused by vehicle engines during charging. Joe Allen, professor at the Harvard T.H. Chan School of Public Health, states that combustion engines remain a significantly greater burden on the environment and health, emitting carcinogenic substances like benzene and smog-forming emissions.

Despite the new findings, fast-charging stations still have lower emissions compared to gas stations. ChargePoint, the largest charging network operator in the US, enforces a minimum height for air intake and outlet on DC fast-charging stations to limit dust, dirt, and water ingress.

Yuan Yao, study co-author, suggests a solution to ensure electric vehicles' introduction is clean. He emphasizes the importance of considering possible emissions from charging equipment when expanding the charging infrastructure for electric cars. ChargePoint plans to use filters in future devices to reduce particle emissions.

Tesla did not respond to requests for comment regarding the study's findings. No specific companies were identified in the search results as having already taken measures to address the risks of particle emissions at fast-charging stations for electric vehicles.

While the study highlights a potential issue with fast-charging stations for electric vehicles, it's important to remember that the overall environmental and health benefits of electric cars compared to gasoline-powered vehicles are significant. Allen prefers charging electric cars over refueling gasoline-powered cars due to lower emissions.

In conclusion, while fast-charging stations for electric vehicles may contribute to air pollution, they still have lower emissions compared to gas stations. As the charging infrastructure for electric cars expands, it's crucial to consider and address potential sources of air pollution to ensure a cleaner and healthier environment.