Gain same-phase amplifying circuit based charging power supply for lithium ion battery

A lithium-ion battery and in-phase amplification technology, which is applied in the electronic field, can solve problems such as low output power, output voltage and current instability, and achieve the effect of increasing output power, maintaining stable current, and ensuring stability

Inactive Publication Date: 2016-09-28
CHENGDU JUHUICAI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the defects of unstable output voltage and current and low output power in the charging power s

Method used

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  • Gain same-phase amplifying circuit based charging power supply for lithium ion battery
  • Gain same-phase amplifying circuit based charging power supply for lithium ion battery

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Embodiment

[0019] Such as figure 1 As shown, the present invention is mainly composed of a control chip U2, a diode rectifier U1, a transformer T, a thermistor RT, a polar capacitor C1, a resistor R1, a gain in-phase amplifier circuit, a low-pass filter circuit, a thyristor voltage regulator circuit, and a power adjustment circuit composition.

[0020] When connected, the thermistor RT is connected in series between the two input terminals of the diode rectifier U1. The anode of the polarity capacitor C1 is connected to the negative output terminal of the diode rectifier U1, and the negative terminal thereof is connected to the positive output terminal of the diode rectifier U1. One end of the resistor R1 is connected to the negative pole of the polarity capacitor C1, and the other end is grounded. The low-pass filter circuit is connected to the positive output terminal of the diode rectifier U1. The gain non-inverting amplifier circuit is connected in series between the low-pass filt...

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PUM

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Abstract

The invention discloses a gain same-phase amplifying circuit based charging power supply for a lithium ion battery. The gain same-phase amplifying circuit based charging power supply is characterized by mainly consisting of a control chip U2, a diode rectifier U1, a transformer T, a thermistor RT, a polar capacitor C1, a resistor R1, a low-pass filtering circuit, a gain same-phase amplifying circuit, a thyristor voltage stabilizing circuit and a power regulator circuit, wherein the gain same-phase amplifying circuit is serially connected between the low-pass filtering circuit and a VDD pin of the control chip U2; the thyristor voltage stabilizing circuit is serially connected between the control chip U2 and a primary side of the transformer T; and the power regulator circuit is connected with a dotted terminal of a secondary-side inductance coil L4 of the transformer T and the control chip U2 respectively. The charging power supply can supply 4.2 V reference voltage required during charging for the lithium ion battery; meanwhile, constant current charging can be carried out on the lithium ion battery until the voltage is 4.2 V, and then constant voltage charging is carried out, so that stable charging voltage and current can be supplied for the lithium ion battery, and overcharging of the lithium ion battery is effectively prevented.

Description

technical field [0001] The invention relates to the field of electronics, in particular to a charging power supply for a lithium ion battery based on a gain in-phase amplifier circuit. Background technique [0002] At present, lithium-ion batteries are widely used in portable electronic devices such as mobile phones, camcorders, notebook computers, cordless phones, power tools, remote control or electric toys, and cameras due to their excellent characteristics. However, the output voltage and current of the existing lithium-ion battery charging power supply are unstable, which leads to overcharging of the lithium-ion battery and shortens the service life of the lithium-ion battery. At the same time, the existing lithium-ion battery charging power supply still has the problem of low output power, which leads to a long charging time of the lithium-ion battery. [0003] Therefore, it is urgent to provide a lithium-ion battery charging power supply that can output stable voltag...

Claims

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Application Information

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IPC IPC(8): H02J7/00H02H7/18
CPCH02H7/18H02J7/0026H02J7/00302
Inventor 不公告发明人
Owner CHENGDU JUHUICAI TECH
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