Uninterruptible power supply, on-off control module, control method, and system

An on-off control circuit, wherein a first end of the on-off control circuit is connected to an uninterruptible power supply, and a second end of the on-off control circuit is connected to a power supply;

• and
• wherein the on-off control circuit is configured to:
• send a first control signal to the uninterruptible power supply;
• and
• switch to a disconnected state when determining that a current in a circuit connecting the on-off control circuit to the uninterruptible power supply is zero, wherein the first control signal indicates to a controller of the uninterruptible power supply to control the current in the circuit connecting the uninterruptible power supply and a first on-off control circuit to be zero, and wherein the current in the circuit is zero after a main circuit switch connected between a rectifier of the uninterruptible power supply and an input end of the uninterruptible power supply is switched to be open in response to the first control signal.

An uninterruptible power supply system, comprising:

• an uninterruptible power supply comprising:
• a controller;
• a rectifier;
• a main circuit switch connected between the rectifier and an input end of the uninterruptible power supply;
• an inverter;
• and
• a battery;
• and
• a first on-off control circuit;
• wherein the input end of the uninterruptible power supply is connected to a power supply using the first on-off control circuit;
• and
• wherein the rectifier is configured to convert an alternating current provided by the power supply into a direct current and transmit the direct current to the battery and the inverter;
• wherein the inverter is configured to convert the direct current into an alternating current;
• wherein the battery is configured to output the direct current to the inverter when the rectifier stops operating normally;
• and
• wherein the controller is configured to:
• when the rectifier operates normally and a first control signal sent by the first on-off control circuit is received by the controller, control the rectifier to stop operating and the main circuit switch to be open, wherein after the rectifier stops operating and the main circuit switch is open, the battery outputs the direct current to the inverter, and the current in the circuit connecting the uninterruptible power supply and the first on-off control circuit is zero;
• and
• wherein a first end of the first on-off control circuit is connected to the uninterruptible power supply, and a second end of the first on-off control circuit is connected to the power supply;
• and
• wherein the first on-off control circuit is configured to:
• send the first control signal to the uninterruptible power supply;
• and
• switch to a disconnected state when determining that the current in the circuit connecting the uninterruptible power supply is zero, wherein the first control signal indicates to the controller to control the current in the circuit connecting the uninterruptible power supply and the first on-off control circuit to be zero.