Lithium battery charging management system and method

Abstract

A lithium battery charging management system disclosed by the present invention comprises a power supply circuit, a switch circuit, a data acquisition circuit, a control circuit and a lithium battery,wherein the power supply circuit is connected with the control circuit, the control circuit is connected with the switch circuit, the switch circuit is connected with the lithium battery, and the control circuit and the lithium battery are connected to the data acquisition circuit. The power circuit is connected with a switch chip of the switch circuit, the switch chip comprises a first field effect transistor and a first triode, the fast recovery diode and the inductor belong to the switch circuit, a collector of the first triode is connected to the fast recovery diode, the fast recovery diode is connected with the inductor, and the inductor is connected to the lithium battery. The data acquisition circuit comprises a current feedback circuit and an over-current protection circuit, the current feedback circuit comprises a second triode, and the over-current protection circuit comprises a diode group composed of a plurality of diodes connected in parallel. The invention further provides a lithium battery charging management method, so that the circuit power consumption is effectively prevented from being too high, the problem of circuit damage caused by heating is avoided, and theworking reliability is improved.

Description

technical field [0001] The invention relates to the technical field of power electronics, in particular to a charging management system and method for a lithium battery. Background technique [0002] Due to the advantages of lithium batteries such as small size, high energy density, no memory effect, high voltage, and low self-discharge rate, more and more electronic devices, such as mobile phones, electric vehicles, and Bluetooth devices, have begun to use lithium batteries as the main power supply. [0003] Due to the high energy density of lithium batteries, there are certain risks in the process of charging and discharging. When the lithium battery is in an overcharged state, the temperature of the lithium battery will rise, causing the electrolyte inside the lithium battery to decompose and generate gas, which will increase the internal pressure of the lithium battery. Big and cracked and on fire. At present, many inferior lithium battery charging management systems ar...

AI Technical Summary

Problems solved by technology

[0003] Due to the high energy density of lithium batteries, there are certain risks in the process of charging and discharging. When the lithium battery is in an overcharged state, the temperature of the lithium battery will rise, causing the electrolyte inside the lithium battery to decompose and generate gas, which will increase the internal pressure of the lithium battery. big and cracked and on fire

At present, many inferior lithium battery charging management systems are unreasonably designed, which will cause the lithium battery to be in an overcharged state, resulting in danger and low safety and reliability.

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