Power supply system of vehicle and vehicle

The utility model discloses a power supply system of a vehicle and the vehicle, and belongs to the technical field of vehicles. The power supply system comprises: an input device for receiving a first input of a user; the host is in communication connection with the input device; the vehicle body controller is in communication connection with the host; the battery comprises a battery cell and a battery controller, the battery cell is electrically connected with the battery controller, the battery controller is electrically connected with the input device, the host and the vehicle body controller, the battery controller is in communication connection with the vehicle body controller, and the battery controller is used for powering off based on the first input. Through the design of the power-off mode, it is guaranteed that when the after-sales maintenance vehicle needs to cut off the battery power supply of the whole vehicle, power-off operation is convenient, related parts do not need to be disassembled and r