Guard power supply module capable of switching working modes

Abstract

The utility model relates to the technical field of direct-current power supply systems, in particular to a guard power supply module with switchable working modes. The device comprises a storage battery protection device and a storage battery pack, the storage battery protection device is connected with the storage battery pack, the storage battery protection device is connected with a direct current bus, the storage battery pack is connected with the direct current bus through a nuclear capacity non-return device, the storage battery protection device comprises a fuse and a dual active bridge converter, the fuse is connected with the storage battery pack, and the dual active bridge converter is connected with the storage battery pack. And the dual-active bridge converter is connected with the direct current bus. According to the utility model, the dual active bridge converter is adopted, voltage errors among direct current bus side voltage feedback V1, storage battery pack side voltage feedback V2 and a set voltage reference Vref are calculated, and two phase shift angles phi with opposite full-bridge inverted voltage waveforms are output through the output voltage controller; rapid switching of two working modes of charging and discharging of the storage battery pack is realized, and voltage stability of a direct current bus is guaranteed.

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