Will the Motor of an Electric Car Be Damaged When Submerged in Water?

[Nguyen]

Electric car motors will not be damaged when submerged in water. As high-energy-density products, pure electric vehicles must comply with the Ingress Protection (IP) standards for electrical equipment enclosures proposed by the European Committee for Electrotechnical Standardization, typically rated at IP67 or IP68 for waterproof and dustproof capabilities. IP is the abbreviation for the Ingress Protection rating of electrical equipment enclosures. The first digit indicates the solid particle protection level, ranging from 0 to 6, where 6 means "No ingress of dust; complete protection against contact." The second digit indicates the liquid protection level, ranging from 0 to 8, where 7 means "Protected against the effects of temporary immersion in water up to 1 meter for 30 minutes," and 8 means "Protected against the effects of continuous submersion in water under conditions specified by the manufacturer." Whether IP67 or IP68, both indicate that the power battery of an electric vehicle will not leak electricity when submerged in water or passing through flooded areas for a short period. However, if parked in low-lying areas or underground garages for an extended time, it is still advisable to find a safer location. After prolonged submersion, weak points such as connectors may still allow water ingress under pressure, and excessively high water levels could also backflow into other pipelines in the vehicle.