Power Electronics

Power electronics include crucial and sensitive components such as inverters, converters, high-voltage connectors, and more. These systems facilitate the transfer of power throughout an electric vehicle (EV) and play a vital role in enabling its performance and reliable operation. However, power electronics face threats such as electromagnetic interference (EMI), heat, short circuits and electrical arcing, and harsh mechanical and environmental conditions. If not properly addressed, these issues can lead to reduced efficiency, system malfunctions, and safety risks to passenger safety.

Automotive design engineers can choose from Qnity’s comprehensive portfolio of advanced materials engineered to address these challenges and withstand mechanical and environmental stress. For example:

• Board-level shields, enclosures, gaskets, and grounding contacts protect against electromagnetic interference.
• Thermal management solutions, including thermal interface materials and thermoformable films, help dissipate heat that threatens electronic operability.

Ensuring reliable electrical connections is crucial to maintaining consistent performance in power electronics. Qnity’s laminated circuit materials enhance electrical performance while withstanding stress and vibration that degrades traditional wiring. Using high-durability silver, Qnity supports the development of reliable high-voltage connections.  Additionally, electrolytic tin solutions offer corrosion resistance for connectors exposed to environmental conditions.

Another key challenge is choosing materials that offer robust electrical insulation. Short circuits and arcing can permanently damage power electronics and pose serious safety hazards. Thermally conductive insulators provide high thermal conductivity while maintaining electrical insulation. Busbar insulation materials provide high dielectric strength and thermal stability, enhancing safety and reliability.

As the automotive industry advances toward higher-voltage architectures and faster charging, the challenges facing power electronics will increase. Design engineers must leverage advanced materials across power electronics that enable EVs to operate reliably, efficiently, and safely under demanding conditions.