Lithium battery charging management system and method

Abstract

The invention discloses a lithium battery charging management system which comprises a power supply circuit, a switching circuit, a data acquisition circuit, a control circuit and a lithium battery. The power supply circuit is connected with the control circuit, the control circuit is connected with the switching circuit, the switching circuit is connected with the lithium battery, and the control circuit and the lithium battery are connected to the data acquisition circuit; and the power supply circuit is connected with a switch chip of the switching circuit, the switch chip comprises a first field effect transistor and a first triode, the fast recovery diode and the inductor belong to the switching 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 overcurrent protection circuit, the current feedback circuit comprises a second triode, and the overcurrent protection circuit comprises a diode group formed by a plurality of diodes connected in parallel. The invention further provides a lithium battery charging management method, the problems that the power consumption of the circuit is too high, and the circuit is damaged due to heating are effectively avoided, and the working reliability is improved.

Description

technical field [0001] The present application 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 ...

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.

Images