Charging chip of lithium ion battery

Abstract

The invention discloses a charging chip of a lithium ion battery. The charging chip comprises a battery voltage detection module; a control module which is used for receiving a voltage detection value output by the battery voltage detection module and comparing the voltage detection value with a preset voltage value to output a control signal so as to adjust charging current intensity of an external power supply to the battery; a charging current adjusting module for receiving the control signal output by the control module and adjusting the charging current intensity of the external power supply to the battery according to the control signal. The detecting end of the battery voltage detection module is connected with the anode of the lithium ion battery, and the output end of the battery voltage detection module is connected with the voltage value input end of the control module; the control signal output end of the control module is connected with the control signal input end of the charging current adjusting module; the charging current input end of the charging current adjusting module is connected with the external power supply, and the charging current output end of the charging current adjusting module is connected with the anode of the lithium ion battery.

Description

technical field [0001] The invention relates to the technical field of charging lithium-ion batteries, in particular to a charging chip for lithium-ion batteries. Background technique [0002] In the prior art, a chip for charging a lithium-ion battery generally uses a constant current or constant voltage to charge the lithium-ion battery, which seriously affects the service life of the lithium-ion battery. On the other hand, lithium-ion battery charging chips generally need to add battery reverse connection protection circuits around them, which makes the entire charging circuit complex, relatively poor in stability, and increases the material cost of components. Contents of the invention [0003] The main purpose of the present invention is to provide a method that can not only control the charging state according to the voltage of the lithium-ion battery, thereby prolonging the service life of the lithium-ion battery, but also simplify the peripheral circuit of the chip...

AI Technical Summary

Problems solved by technology

[0002] In the prior art, chips for charging lithium-ion batteries generally use constant current or constant voltage to charge lithium-ion batteries, which seriously affects the service life of lithium-ion batteries

On the other hand, lithium-ion battery charging chips generally need to add battery reverse connection protection circuits around them, which makes the entire charging circuit complex, relatively poor in stability, and increases the material cost of components.

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