Silicon nitride thermal substrate has been put on the Ceramic Core Immersion Heaters market for so many years, its own potential has been almost tapped, and everyone has shifted their energy to packaging, that is, heat dissipation. The heat dissipation efficiency requirements are much higher than the industrial grade, the temperature in the inverter is extremely high, and the strong vibration conditions are also considered, and the vehicle specification grade is far above the industrial grade. The power conductive terminals of the IGBT module for electric vehicles need to carry a large current of hundreds of amperes, which has high requirements for electrical conductivity and thermal conductivity, and also has to withstand certain vibrations and shocks in the vehicle environment, and the mechanical strength requirements are high.
For silicon nitride is perfect. Silicon nitride ceramic circuit board can steatite c221 adapt to high temperature and high pressure working environment. It can dissipate the high heat in the power supply system in time, adapt to the harsh environment inside the car, and protect the normal operation of the chip while the normal operation of the major power load. Extend the life cycle of electronic devices. Save more space and provide more possibilities for new energy vehicles.
In the core motor drive of new energy vehicles, but the ceramic chip area is small, the heat dissipation requirements are high, and the silicon nitride ceramic substrate has excellent heat dissipation ability and high reliability, which has almost become a must for ceramics in the main drive application of new energy vehicles.
At present, the ceramics that have been mass-produced have used silicon nitride cordierite c520 ceramic substrates in large quantities to cope with the heat dissipation of ceramic devices. The use of self-developed new ceramic motor control module, high-performance silicon nitride ceramic and integrated NTC sensor, so that the entire electronic control unit power density increased by nearly 30%, the maximum current support 840A, the maximum voltage of 1200V, the maximum efficiency of electronic control of 99.7%.