The incompatibility of water and electrical systems is a fundamental principle of electric-vehicle (EV) design. However, achieving reliable moisture exclusion is non-trivial. For example, sealing alone doesn’t necessarily preclude condensation due to initial humidity or long-term ingress through nominally sealed interfaces. Therefore, mitigation strategies must extend beyond simple sealing, especially for devices exposed to mechanical stress, such as those installed in electric vehicles.
The determination of the most appropriate water intrusion and condensation protection approach hinges on a risk-based assessment, considering both the cost of the device and the potential consequences of its failure. For example, given its operational criticality, the traction inverter necessitates the highest level of protection.