Floating charger over-current protection circuit

Abstract

The invention provides a floating charger over-current protection circuit which comprises a sampling comparison circuit, a comparison control circuit and a MOS tube Q5. The drain electrode of the MOS tube Q5 is connected with a cathode of a storage battery. A source electrode of the MOS tube Q5 is connected with one end of a resistor R56. The other end of the resistor R56 is grounded. The sampling comparison circuit comprises a comparator U6C, a resistor R54 and a resistor R55. The comparison control circuit comprises a resistor R60, a resistor R63, a resistor R67, a capacitor C43, a diode D15 and a comparator U7A. The floating charger over-current protection circuit is connected to the cathode of the storage battery, according to the detected voltage of the resistor R56, whether the storage battery is communicated or not is judged, the damage of the storage battery by overlarge current is prevented, the effect of over-current protection is achieved, and the floating charger over-current protection circuit has the advantages of simple circuit structure, easy implementation and good protection effect.

Description

technical field [0001] The invention relates to an overcurrent protection circuit, in particular to an overcurrent protection circuit for a float charger. Background technique [0002] At present, the battery is mostly charged by directly connecting the battery to the output terminal of the float charger. Due to the complexity of the charging site environment, when using the float charger to charge, it is easy to appear short circuit, reverse connection, excessive load, etc. The output current of the float charger output is too large, which can easily cause float charging. The components of the charger are overheated, which will damage the float charger and cause the float charger to fail to work normally. [0003] In order to solve the above existing problems, people have been seeking an ideal technical solution. Contents of the invention [0004] The object of the present invention is to address the deficiencies of the prior art, thereby providing a float charger overc...

AI Technical Summary

Problems solved by technology

Due to the complexity of the charging site environment, when using the float charger to charge, it is easy to appear short circuit, reverse connection, excessive load, etc. The output current of the float charger output is too large, which can easily cause float charging. The components of the charger are overheated, which will damage the float charger and cause the float charger to fail to work normally.

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