Troubleshooting method and apparatus for power supply device

A power supply device, comprising:

• an inverter power supply system comprising at least two DC/DC modules connected in parallel to a battery and supplying power to a load by using a direct current to alternating current (DC/AC) power supply, and each of the at least two DC/DC modules comprising fuses F1 and F2, relays K1 and K2, inductors L1 and L2, switch modules Q1, Q2, and Q3, and DC bus capacitors C1 and C2;
• wherein one terminal of the K1 is connected to a positive terminal of a battery via the F1, one terminal of the K2 is connected to a negative terminal of the battery via the F2, the other terminal of the K1 is connected to connection terminals of the Q1 and the Q2 via the L1, the other terminal of the K2 is connected to connection terminals of the Q2 and the Q3 via the L2, one terminal of the Q1 is connected to one terminal of the C1, the other terminal of the Q1 is connected to one terminal of the Q2, the other terminal of the Q2 is connected to one terminal of the Q3, the other terminal of the C1 is connected to the other terminal of the Q3 by using the C2, and
• wherein each of the at least two DC/DC modules of the power supply device comprises:
• a detection unit configured to detect a voltage signal and/or a current signal in any one of the DC/DC modules, determine, based on the detected voltage signal and/or the detected current signal, whether the any one of the DC/DC modules is faulty, and when detecting that the any one of the DC/DC modules is faulty, detect a faulty component in the faulty module;
• and
• a control unit configured to, when the detection unit detects that the faulty component in the faulty module is a C1 or a C2, and the inverter power supply system is in a battery discharging mode, turn on a Q2 of the faulty module, wherein an F1 and an F2 of the faulty module are blown to disconnect the faulty module from another DC/DC module.