Lithium batteries are generally suitable if exposed to rain. Lithium batteries with good waterproof performance will be suitable as long as they are not exposed to water for a long time. If the battery inflates, it must have been filled with water and cannot be reused to avoid explosion.
Nowadays, most manufacturers offer many waterproof models for their own electric vehicles. Therefore, it is usually not a big problem for electric vehicles to get wet in the rain, but the cables will also get wet. You can open the hood to dry. Especially on rainy days, it is not allowed to charge the electric vehicle immediately after it gets wet. The electric vehicle battery should be air-dried before charging to avoid accidents.