Electric vehicles have been facing a new danger recently – the risk of fire due to exposure to saltwater. The aftermath of Hurricane Helene has brought this issue to the forefront, with EVs in Florida spontaneously combusting as a result of being submerged in saltwater. This has prompted warnings from officials and car manufacturers alike to take precautions to prevent such incidents.
Saltwater poses a significant threat to electric vehicle batteries because of its ability to conduct electricity. The National Highway Traffic Safety Administration (NHTSA) has been studying this phenomenon since EV fires became more common after Hurricane Sandy in 2012. While freshwater flooding in California has not resulted in the same number of EV fires as seen in Florida, saltwater is believed to be the key factor.
Lithium-ion batteries used in electric vehicles can catch fire if they short circuit and overheat. Tom Barth from the National Transportation Safety Board explains that if the heat spreads between different cells in the battery, it can lead to a chain reaction known as thermal runaway. Saltwater can bridge the gap between the positive and negative terminals of the battery, causing a short circuit and potentially leading to a fire.
Car manufacturers design their batteries with safety measures in place, such as separations or insulation barriers between cells. They also take steps to prevent moisture from entering the battery pack. However, submerging the batteries in standing saltwater can compromise these seals, making it easier for the saltwater to cause a short circuit.
Once an electric vehicle has been submerged in saltwater, the damage does not disappear once the water recedes. In some cases, EVs have caught fire long after being exposed to saltwater, as the conductive salt remains present. After Hurricane Ian, thousands of EVs were impacted by water, with dozens catching fire. While not every submerged EV will catch fire, it’s crucial to follow safety guidelines to prevent such incidents.
Florida, in particular, faces an increased risk of EV fires due to the storm surge caused by Hurricane Helene. Ocean water flooded some areas up to 20 feet deep, putting many EVs at risk. If your electric vehicle has been affected by flooding, it’s essential to park it away from anything flammable and have it inspected by a professional.
In conclusion, the dangers of saltwater on electric vehicles are real and should not be taken lightly. By understanding the risks and taking proactive measures, EV owners can help prevent fires and ensure the safety of their vehicles. As technology continues to evolve, car manufacturers will likely implement further safety features to protect against such incidents in the future.
