Higher charging performance and the growing adoption of bidirectional charging are driving advancements in on-board chargers (OBCs) for electric vehicles (EVs). To meet the thermal management demands of these evolving systems, Wevo-Chemie GmbH offers thermally conductive silicone potting compounds, gap fillers, and gels designed to enhance the efficiency and longevity of OBCs and power electronics, including dc/dc converters.
Wevo’s third-generation WEVOSIL materials enable faster cycle times, supporting efficient serial production of OBCs. These two-component silicones can be tailored to specific requirements, including flow behavior, pot life, hardness, and adhesion, ensuring compatibility with various power electronics applications.
Managing heat dissipation and adhesion
Fast charging requires effective heat management. Wevo’s thermally conductive silicones range from 1 W/m·K potting compounds (WEVOSIL 22102 FL) to 4 W/m·K gap fillers (WEVOSIL 26040 FL). These materials help sensitive electronic components maintain stable operation throughout their lifecycle, even under high-temperature conditions.
Additionally, Wevo silicone gels adhere effectively to housings, even after full curing, ensuring thermal stability and long-term reliability in high-voltage power electronics.
Optimizing flow behavior for efficiency
Wevo’s silicone-based potting compounds, gap fillers, and gels are designed for reliable filling, even in small gaps, improving heat dissipation in inductive components while maintaining efficient manufacturing processes. These materials support modern OBC designs that integrate DC/DC converters within the EV drivetrain, HV battery, and main inverter.
In addition to its silicone-based solutions, Wevo offers polyurethane and epoxy resins that can be adapted to specific customer and component requirements. These materials contribute to the continued advancement of power electronics and EV thermal management.
Filed Under: Onboard Charging, Technology News