Anti-reverse connection protection circuit of solar charging controller

Abstract

The invention relates to an anti-reverse connection protection circuit of a solar charging controller. The anti-reverse connection protection circuit is provided with a solar battery, a storage battery, a fuse wire, a microprocessor unit, a first power supply unit, a second power supply unit, a first drive unit, a second drive unit, an MOSFET (metal oxide semiconductor field effect transistor) tube Q1, an MOSFET tube Q2, a diode D1, a diode D2, a solar battery reverse connection detection unit and a storage battery reverse connection detection unit. According to the anti-reverse connection protection circuit, a protection function can be immediately produced when positive and negative electrodes of the solar battery are reversely connected or positive and negative electrodes of the storage battery are reversely connected by the solar battery reverse connection detection unit and the storage battery reverse connection detection unit as well as the first drive unit and the second drive unit, so that the accident of reverse charging of the solar battery on the storage battery is avoided, and the safety of the storage battery, the solar battery and the solar charging controller as well as the people is effectively protected. The anti-reverse connection protection circuit is simple in structure, complete in protection function and good in effect, and has double anti-reverse connection protection functions.

Description

Technical field [0001] The invention relates to a solar charge controller technology, in particular to an anti-reverse connection protection circuit of a solar charge controller. Background technique [0002] The solar charge controller is used for the full control of the solar battery charging process to the battery. During use, if the operation is improper, the positive and negative polarity of the battery at the input of the controller will be reversed, or the solar cell at the input of the controller will be reversed. , Or the positive and negative polarity of the two are reversed at the same time, so that during the charging process, it will cause the solar battery to reverse charge the battery. The consequence is that the battery will be damaged in the slightest, and the strong spark discharge will be generated in the worst case. , Which seriously affects the service life of the battery, and more seriously will cause the battery to overheat and explode, which can easily cau...

AI Technical Summary

Problems solved by technology

[0002] The solar charge controller is used to control the whole process of solar battery charging to the battery. During use, if the operation is improper, the positive and negative polarities of the battery at the input terminal of the controller are reversed, or the positive and negative polarities of the solar battery at the input terminal of the controller are reversed. , or the positive and negative polarities of the two are reversed at the same time, so that during the charging process, it will cause the solar battery to reversely charge the battery. , seriously affect the service life of the battery, and more seriously, it will cause the battery to overheat and explode, which will easily cause property loss and personal safety accidents.

At present, the existing solar charge controllers do not have reverse connection protection measures in this regard, and there are potential safety hazards

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