All electronic components of the on-board charger need to be packaged in this airtight housing environment to prevent environmental pollution. This requires that these electronic devices/chips/MOSFETs, etc., which generate huge heat, must be in contact with the inner wall of the shell of the metal mold to effectively achieve heat transfer (heat dissipation). The MOS tube plays the role of amplifying or switching circuits in the electronic circuit, so the insulation performance is the first parameter to be considered for the heat dissipation material of the MOS tube.

At present, the more common thermal management material solution is to use thermally conductive insulating sheets, or thermally conductive insulating sheets + thermally conductive silicone grease. Tgard 500/5000 thermally conductive insulating gaskets have functions such as insulation withstand voltage/tear resistance, and the breakdown voltage can reach more than 6KV , to meet the needs of the car, the extremely low thermal resistance can quickly transfer the heat generated by the MOS to the shell radiator of the car charger. Tgard K52 phase change insulating material can also be used directly. The phase change coating is solid at room temperature. When the working temperature reaches its phase change temperature, it will change from a solid state to a fluid state. At this time, under the pressure of the external fastener, The phase change material in the fluid state can fully wet the interface (heat source and heat sink surface) to minimize the contact thermal resistance of the interface, so as to achieve the best heat transfer. At the same time, the carrier in the middle of this material also has a high dielectric strength.