The rapid adoption of Silicon Carbide (SiC) for drive train inverters in Battery Electric Vehicles is changing the market landscape. Silicon Carbide inverters offer a 5-10% improvement in efficiency, resulting in either extended range or a reduction in battery size, and lower system costs. While it takes more energy to grow Silicon Carbide than Silicon, that extra energy is returned multifold in the application, with an impressive 13x energy saved on energy invested (ESOI) for an 800 V bus. This gives a path to further reductions in the Carbon footprint of the OEM. These benefits are driving a large number of OEMs to design SiC into their systems, but concerns remain around assurance of supply. To address these supply concerns Wolfspeed is expanding our capacity. Today’s SiC power device manufacturing is largely based on 150 mm substrates, allowing cost reduction over recent years. As the market continues to accelerate, the push to 200 mm substrates is inevitable to further cost reductions and increase supply. Wolfspeed is in the final stages of building the world’s first, largest, and only 200mm Silicon Carbide factory in upstate New York.
This paper was presented at the virtual Advanced Automotive Tech Forum 2022. Click here to view more presentations
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