Vehicle starting method, power supply, and vehicle

A method for controlling a vehicle power system of a vehicle, wherein the vehicle comprises a first battery, at least one controller, a switching circuit, and a connection portion, wherein the connection portion is a cigarette lighter interface of the vehicle connected to the first battery and the at least one controller, and the connection portion is further configured to be connected to an external power supply, the method comprising:

• controlling the switching circuit to switch to a first mode under a first condition or switch to a third mode under a third condition,
• wherein controlling the switching circuit to switch to the first mode under the first condition comprises:
• in the first mode, connecting the connection portion to the at least one controller through a first circuit of the switching circuit;
• and
• the first condition comprises:
• a voltage of the first battery is lower than a first voltage threshold, or the switching circuit receives a first signal, and the first signal is used to control the switching circuit to work in the first mode;
• and
• wherein controlling the switching circuit to switch to the third mode under a third condition comprises:
• in the third mode, enabling the vehicle to supply power to the connection portion through the first circuit;
• and
• the third condition comprises:
• the switching circuit receives a third signal, and the third signal is used to control the switching circuit to work in the third mode.

A non-transitory computer-readable storage medium, wherein the non-transitory computer-readable storage medium stores program instructions, and when the program instructions are executed by a computer of a vehicle, cause the computer to perform operations for controlling a power system of the vehicle, wherein the vehicle comprises a first battery, at least one controller, a switching circuit, and a connection portion, wherein the connection portion is a cigarette lighter interface of the vehicle connected to the first battery and the at least one controller, and the connection portion is further configured to be connected to an external power supply;

• the operations comprising:
• controlling the switching circuit to switch to a first mode under a first condition or switch to a third mode under a third condition,
• wherein controlling the switching circuit to switch to the first mode under the first condition comprises:
• in the first mode, connecting the connection portion to the at least one controller through a first circuit of the switching circuit;
• and
• the first condition comprises:
• a voltage of the first battery is lower than a first voltage threshold, or the switching circuit receives a first signal, and the first signal is used to control the switching circuit to work in the first mode;
• and
• wherein controlling the switching circuit to switch to the third mode under a third condition comprises:
• in the third mode, enabling the vehicle to supply power to the connection portion through the first circuit;
• and
• the third condition comprises:
• the switching circuit receives a third signal, and the third signal is used to control the switching circuit to work in the third mode.