Supercapacitors can play an important role in the power system of electric vehicles. They can serve as power balancers for power electronic control units, such as inverters for electric motors. In addition, supercapacitors can also be used as starting systems to provide fast starting current for vehicles. They can even be integrated into information entertainment systems to ensure stable operation of the system. In the charging system of electric vehicles, supercapacitors can also be used to temporarily store electrical energy. Finally, supercapacitors can also help with battery health management and reduce the pressure of charging and discharging lithium batteries.