Electric vehicle power supply equipment and battery backup method thereof, and power backup device

A battery backup method for an electric vehicle power supply equipment, comprising:

• providing a power failure indication signal through a protection circuit of the electric vehicle power supply equipment based on a positive charging voltage and a negative charging voltage;
• providing a discharge control signal through a control circuit of the electric vehicle power supply equipment based on the power failure indication signal and a pilot information;
• converting a battery voltage of a battery into an output voltage through a discharge circuit of the electric vehicle power supply equipment based on the discharge control signal, the discharge circuit being coupled to the battery;
• providing the output voltage as a pilot voltage or a positive equipment voltage through an output switching circuit of the electric vehicle power supply equipment based on a supply target signal from the control circuit;
• determining whether a charging gun is connected to an electric vehicle based on the pilot voltage through a control pilot circuit of the electric vehicle power supply equipment to provide the pilot information;
• and
• providing a negative equipment voltage based on the positive equipment voltage through an auxiliary discharge circuit of the electric vehicle power supply equipment,
• wherein the positive charging voltage and the negative charging voltage are received from a power supply conversion circuit or the connected electric vehicle.

A power backup device, comprising:

• a battery module;
• a power supply conversion circuit, electrically connected to the battery module;
• an output circuit, electrically connected to the power supply conversion circuit;
• and
• a control circuit, electrically connected to the battery module, the power supply conversion circuit, and the output circuit,
• wherein the control circuit receives an external status indication signal to control the battery module to discharge or control the power supply conversion circuit to charge the battery module.