Silicon carbide is popular in the new energy vehicle industry

The new energy vehicle industry flourish rapidly in recent years. Silicon carbide plays an important role in the OBC charger. Convenient and fast charging has become an important consideration for consumers to purchase and use new energy vehicles. Compared with the fixed DC fast charging pile outside the vehicle, the onboard charger (OBC) has small site restrictions and convenient charging, which is very suitable for the charging needs of domestic new energy vehicles. As the core part of new energy vehicles, the onboard charger (OBC) directly determines the safety and stability of new energy vehicles.

Because of its unique combination of the high critical electric field, high electron drift velocity, high temperature, and high thermal conductivity, silicon carbide has become the first choice for high-power systems.
At the transistor level, it has low on-resistance (RDS (on)) and low switching loss, making it an ideal choice for high current and high voltage applications.
It is understood that BYD, Geely, Xinrui Technology, Renault, Bogue Warner, Shanghai Volkswagen, and Nissan use SiC devices in the onboard charger (OBC) of some of their models.

In addition to SiC, silicon (Si) MOSFETs are also active devices in high-power design. OBCs using traditional silicon (Si) based power semiconductors as core power devices have reached the bottleneck in efficiency and power density. Continued use of silicon-based semiconductors has been unable to significantly improve the efficiency and power density of OBCs. In contrast, silicon carbide (SiC) power devices have the characteristics of high frequency and high efficiency. The use of SiC power devices on OBC is of great help to improve the efficiency and power density of OBC.