A well-known automobile manufacturer has announced the full adoption of SiC power devices in its latest electric vehicles to significantly improve the vehicle's energy efficiency and range. By using SiC MOSFETs and diodes, this model achieves faster charging speed and lower energy loss.

Silicon Carbide

Advantages of SiC application in new energy vehicles

Improve energy efficiency and range

Higher efficiency: SiC power devices such as MOSFETs and diodes have lower on resistance and higher switching frequency, which means they generate less energy loss during operation. This directly translates into higher system efficiency.

Increasing driving range: As SiC devices can improve the efficiency of inverters, new energy vehicles using SiC technology can achieve higher energy efficiency, thereby increasing the maximum driving range of the vehicle. For example, inverters using SiC technology can improve efficiency by more than 3% compared to traditional IGBT inverters, increasing the vehicle's range by 9 miles or more.

Reduce system size and weight

Compact design: SiC devices can provide greater power density in smaller sizes, which means inverters and other power electronic components can be made smaller and lighter. This is a significant advantage for electric vehicles that pursue compact design.

Increasing interior space: The smaller size of the inverter gives designers more freedom to optimize the layout of the vehicle's interior space, thereby increasing passenger and cargo storage space.

Improve thermal management

Better thermal conductivity: SiC materials have higher thermal conductivity, which means they can dissipate heat more effectively. This is particularly important for power electronic devices in electric vehicles, as they need to operate continuously in high temperature environments without affecting performance.

High temperature resistance:SiC devices can withstand higher operating temperatures, which allows them to maintain good performance even in high-temperature environments, reducing the need for cooling systems and further reducing the weight of vehicles.

Improve switch speed and reduce losses

Faster switching speed: SiC devices can perform switching operations at higher frequencies, which helps reduce switching losses in inverters.

Reduce current loss: SiC devices generate lower losses during the switching process, which means more energy can be effectively utilized instead of being lost as heat.

Improve reliability

Higher voltage resistance: The rated voltage of SiC based devices is much higher than that of similar silicon-based devices, which means they can operate stably at higher voltages.

Longer service life: Due to the low loss and high temperature resistance characteristics of SiC devices, they typically have a longer service life.

The application of SiC technology in new energy vehicles not only helps improve the overall performance of the vehicle, but also reduces operating costs, while providing greater flexibility for vehicle design.

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