Vehicle-mounted power supply control system, electric vehicle and vehicle-mounted power supply control method

The embodiment of the invention discloses a vehicle-mounted power supply control system, an electric vehicle and a vehicle-mounted power supply control method. The vehicle-mounted power supply controlsystem comprises a main storage battery, a vehicle end electrical component and an automatic driving electrical component. The main storage battery is provided with a first power output interface anda second power output interface. The first power supply output interface is connected with the automatic driving electrical component, and the second power supply output interface is connected with the vehicle end electrical component; and the main storage battery is used for respectively controlling the power supply states of the two power supply output interfaces according to the interface control instruction. In the embodiment of the invention, the automatic driving electrical component can be independently controlled so that the influence of the fluctuation of the working voltage of the vehicle-end electrical comp