Battery charger output short-circuit protection circuit

Abstract

The output short-circuit protection circuit of the battery charger of the present invention includes an input switching device module 1, a DC power supply module 2, and a charger 3; usually, the mains AC power supply directly supplies power to the charger 3 through the input switching device module 1, and the charger then To charge the electrical equipment, when the input switching device detects that the mains AC power supply is out of power, it automatically disconnects the connection with the mains AC power supply and immediately connects the DC power supply module 2, which is the battery The direct current DC of the group is converted into alternating current AC by the inverter and then supplies power to the charger 3 through the switching device module 1; in this way, the charger 3 always has an AC power supply for it; the present invention provides automatic detection of whether the mains AC power supply is cut off The mobile power supply of the AC seamless switching device that automatically supplies power to the electrical equipment from the backup battery pack.

Description

technical field [0001] The patent of the present invention is used in a power supply device, especially in a mobile power supply device that supplies AC power to equipment that often needs to be moved but cannot be powered off. Background technique [0002] Now there are a lot of equipment that needs to be moved frequently or the mains power is often cut off, but the equipment cannot be powered off. At this time, the equipment often needs to prepare an AC power supply device, which not only increases the maintenance cost of the equipment, but also increases the cost of mobile equipment. It's own weight, and it's all manually operated, so misoperation often occurs. Contents of the invention [0003] In view of the problems in the above-mentioned background technology, the purpose of the invention is to provide a mobile power supply of an AC seamless switching device that automatically detects whether the mains AC power supply is cut off and converts the backup battery pack ...

AI Technical Summary

Problems solved by technology

[0002] Now there are a lot of equipment that needs to be moved frequently or the mains power is often cut off, but the equipment cannot be powered off. At this time, the equipment often needs to prepare an AC power supply device, which not only increases the maintenance cost of the equipment, but also increases the cost of mobile equipment. Its own weight, and it is also manually operated, often misoperation

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