UNINTERRUPTED POWER SUPPLY (UPS) SYSTEM AND METHOD OF OPERATING THE SAME

Embodiments of this application provide a power supply circuit, including a first power conversion module, a plurality of battery banks, a first bus, and a second bus. A first wiring terminal of the first power conversion module is connected to the battery bank, a second wiring terminal of the first power conversion module is 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 a corresponding battery bank, and output currents to the first bus and the second bus. In this application, a quantity of battery banks may be set to be less than a quantity of inverters in a UPS system, so that costs are reduced. In addition, the first bus and the second bus are disposed, so that when either bus is faulty, electric energy can be provided for the inverter by using the other bus, and therefore power supply reliability of the UPS system is improved.