Load short-circuit protection circuit

Abstract

The invention relates to a load short-circuit protection circuit connected between a storage battery and a load circuit. The load short-circuit protection circuit comprises an MOS (Metal Oxide Semiconductor) tube protection circuit, a short-circuit detection circuit, a singlechip and an MOS tube switching circuit, wherein the MOS tube protection circuit is used for the reverse connection protection of the storage battery; the short-circuit detection circuit is used for detecting the short-circuit of the load circuit; the singlechip is used for sending out a switching signal according to a detection result of the short-circuit detection result; the MOS tube switching circuit is used for switching on or off the load circuit according to the switching signal; the short-circuit detection circuit comprises a comparer and a reference voltage generation circuit; the reference voltage generation circuit is connected to a first input end of the comparer; a source electrode of a first MOS tube of the MOS tube protection circuit is connected to a second input end of the comparer; and the output end of the comparer is connected to a first input end of the singlechip. The load short-circuit protection circuit is used for a load short-circuit protection circuit of a solar controller, has low cost, cannot increase the impedance of a load loop and has the function of eliminating instantaneoushigh voltage.

Description

technical field [0001] The invention relates to a protection circuit, more specifically, to a load short-circuit protection circuit for a solar controller. Background technique [0002] Solar energy is distributed all over the world and is one of the cleanest energy sources. Therefore, solar power generation has always been a hot spot in energy research. In recent years, the low-carbon and green environmental protection movement led by the United States and other countries has developed solar power more rapidly than before. [0003] Solar power generation consists of four parts: solar panels, batteries, charge and discharge controllers and loads. The functions of the charge and discharge controller are: (1) charge the electricity of the solar panel into the battery according to the charging method of the battery; (2) manage the electricity of the battery; (3) protect the solar power generation system. [0004] The solar charge and discharge controllers on the market have t...

AI Technical Summary

Problems solved by technology

[0013] The technical problem to be solved by the present invention is to provide a low-cost, low-cost, low-cost short-circuit protection circuit for solar controllers in the prior art, which reduces the power supply efficiency of the circuit and easily damages devices due to instantaneous high voltage. Increase the impedance of the load loop and have a load short-circuit protection circuit for solar controllers that eliminates instantaneous high voltage

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