Over-discharge protection circuit

Abstract

The invention provides an over-discharge protection circuit comprising a voltage acquisition unit, a voltage reference unit, a comparator and an electronic switch; the comparator is connected with a battery bank through the voltage acquisition unit; the comparator is also connected with the voltage reference unit and the electronic switch; the electronic switch is also connected with the battery bank and a load. The voltage acquisition unit gathers the battery bank voltage, and outputs the gathered voltage to the comparator; the voltage reference unit provides a reference voltage for the comparator; the comparator compares the voltage gathered by the voltage acquisition unit with the reference voltage, and controls the electronic switch to open and close according to the comparison result.when the voltage gathered by the voltage acquisition unit is smaller than the reference voltage, the electronic switch stops. The over-discharge protection circuit can provide over-discharge protections for the battery bank.

Description

【Technical field】 [0001] The invention relates to the technical field of protection circuits, in particular to an over-discharge protection circuit. 【Background technique】 [0002] At present, most pure electric vehicles are powered by lithium batteries. During the power supply process, if the lithium battery continues to discharge when its power is low to a certain extent, the lithium battery will cause permanent damage due to overdischarge, thereby reducing the service life of the lithium battery. 【Content of invention】 [0003] In view of the above, it is necessary to provide an over-discharge protection circuit capable of performing over-discharge protection on the battery pack. [0004] In order to achieve the above object, the present invention provides an over-discharge protection circuit. The over-discharge protection circuit includes a voltage acquisition unit, a voltage reference unit, a comparator, and an electronic switch. The comparator is also connected wit...

AI Technical Summary

Problems solved by technology

During the power supply process, if the lithium battery continues to discharge when its power is low to a certain extent, the lithium battery will cause permanent damage due to over-discharge, thereby reducing the service life of the lithium battery.

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