Anti-reverse-connection anti-backflow battery charging protection circuit

Abstract

The invention discloses an anti-reverse-connection anti-backflow battery charging protection circuit, which comprises a voltage comparison module, an execution module, and an anti-reverse-connection control module, wherein two ends of the anti-reverse-connection control module are connected with a negative electrode of a power supply and a negative electrode of a battery; the voltage comparison module comprises a comparator, a voltage acquisition circuit, a comparator power supply circuit and a current-limiting protection resistor; the execution module is connected with a charge management module, the negative electrode of the power supply, and a source electrode and a grid electrode of a first MOS (Metal Oxide Semiconductor) tube. The anti-reverse-connection anti-backflow battery charging protection circuit provided by the invention has the characteristics of low loss, simple structure, practicability, convenience, and better expandability, can prevent the power supply from being reversely connected with the battery, and can also prevent the generation of anti-backflow current when the voltage of the battery is higher than the voltage of the input power supply.

Description

technical field [0001] The invention belongs to the field of electronic technology, and in particular relates to an anti-reverse connection and anti-backflow battery charging protection circuit. Background technique [0002] The battery charging management circuit is used to control the charging of the battery by the input power and plays a very important role. If the input power or the battery is reversed, it is very likely to damage the charging circuit and the battery, and even cause the battery to explode, causing a fire and other more serious situations. At the same time, in the circuit with the battery as the load, if there is no anti-backflow circuit, the battery will continue to supply power to the charging management circuit when there is no input power, which will waste the battery power, especially in high-current charging equipment. Among them, there is no anti-backflow circuit or even permanent damage to the charging circuit. Therefore, the anti-reverse connec...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems of high cost, large loss and poor expandability of the existing charging anti-reverse connection and anti-backflow protection circuit, the present invention provides a low loss, simple structure, practical and convenient, and has good scalability for charging. The anti-reverse connection and anti-backflow protection circuit can prevent the reverse connection between the input power supply and the battery, and can also prevent the backflow current generated when the battery voltage is higher than the input power supply voltage.

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