Power supply circuit and uninterruptible power supply ups system

An uninterruptible power supply (UPS) system, comprising:

• a first inverter circuit;
• a second inverter circuit;
• and
• a battery-powered circuit;
• wherein:
• the battery-powered circuit comprises:
• a first power conversion module;
• a battery bank;
• a first bus;
• a second bus;
• and
• a first wiring terminal of the first power conversion module being connected to the battery bank;
• a second wiring terminal of the first power conversion module being connected to the first bus and the second bus, and the first power conversion module is configured to:
• perform direct current to direct current (DC/DC) conversion on a current output by the battery bank;
• output a first current to the first bus;
• and
• output a second current to the second bus, wherein the second current is receivable by the second bus without passing through the first bus;
• and
• wherein the first bus is connected to a direct current input end of the first inverter circuit, and the first inverter circuit is configured to:
• perform direct current to alternating current (DC/AC) conversion on a current output by the first bus;
• and
• supply power to load;
• and
• wherein the second bus is connected to a direct current input end of the second inverter circuit, and the second inverter circuit is configured to:
• perform DC/AC conversion on a current output by the second bus;
• and
• supply power to the load.

A power supply method, wherein the method is applied to a power supply circuit, and the power supply circuit comprises:

• a first power conversion module;
• a battery bank;
• a first bus;
• a second bus;
• a first wiring terminal of the first power conversion module is connected to the battery bank;
• and
• a second wiring terminal of the first power conversion module is connected to the first bus and the second bus;
• and
• the method comprises:
• performing, by the first power conversion module, DC/DC conversion on a current output by the battery bank;
• outputting a first current to the first bus;
• outputting a second current to the second bus, wherein outputting the second current is received by the second bus without passing through the first bus;
• receiving currents output by the first bus and the second bus, wherein the first power conversion module receives currents output by the second bus without the currents passing through the first bus;
• and
• supplying power to the battery bank by performing direct current to direct current (DC/DC) conversion on the currents output by the first bus and the second bus.