CN105024431A - Battery charging circuit and charging method thereof - Google Patents
Battery charging circuit and charging method thereof Download PDFInfo
- Publication number
- CN105024431A CN105024431A CN201510457726.2A CN201510457726A CN105024431A CN 105024431 A CN105024431 A CN 105024431A CN 201510457726 A CN201510457726 A CN 201510457726A CN 105024431 A CN105024431 A CN 105024431A
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- charging
- voltage
- ltc4054
- current
- battery
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a battery charging circuit and a charging method thereof, and relates to the technical field of electronics. The battery charging circuit is characterized by comprising a model LTC4054 programmable controller, a filter capacitor of and a resistor R31of 1.65K, wherein the LTC4054 is provided with five serial ports; a serial port VCC (4) is connected with the 1 uF filter capacitor; and a serial port PROG (5) is connected with the R31. The battery charging circuit is simple in structure and high in practicability.
Description
Technical field
The present invention relates to electronic technology field, be specifically related to a kind of battery charger and charging method thereof.
Background technology
Portable PID alarm main circuit will comprise the following aspects:
1) control section, this part is by C8051F040 chip microcontroller.Comprise the access facility of photoionization signal and battery electric quantity signals collecting, data processing, CF and alarming value and the function such as the dynamic management of power supply and control.
2) signal condition part, this part mainly comprises the analogue signal circuit before the A/D samplings such as the extraction of photoionization signal, amplification and filtering.
3) data storage section, this part is the access circuit of PID alarm CF value and alarm.
4) button is reported to the police and display section, and this part comprises key circuit, sound light alarming circuit and digital-scroll technique circuit.
5) power management section, this part mainly comprises, battery and charge-discharge circuit, battery protecting circuit, voltage conversion circuit and detection of gas unit integral circuit.
This is for the design of the battery in the power supply in portable PID alarm circuit and charge-discharge circuit thereof.
Summary of the invention
In order to solve the problem existing for background technology, the present invention is by the following technical solutions
:a kind of battery charger and charging method thereof, it is characterized in that battery charger comprises the Programmable Logic Controller that model is LTC4054, the filter capacitor of a 1uF and a R31 is the resistance of 1.65K, LTC4054 has five serial ports, the filter capacitor of serial ports VCC and 1uF is connected, and serial ports PROG and R31 is connected.
Battery charger charging method step is as follows:
When charging voltage Vcc is higher than LTC4054 internal under-pressure lock-up valve 200mV, undervoltage lockout circuit is activated, and now when Vcc is higher than cell voltage 100mV, charging starts;
If now BAT pin voltage is lower than 2.9V, then charging enters precharge (trickle charge) state, at this moment charging current is 1/10 (60mA) of program current value, and this electric current ensures that battery reaches safe voltage levvl when entering constant current charge, extends the useful life of battery;
When BAT pin voltage is increased to more than 2.9V, LTC4054 enters constant current charging mode, and the size of this charging current is program current (600mA);
When the voltage of BAT pin reaches final floating voltage (4.2V), LTC4054 enters constant voltage charge pattern, and charging current starts to decline;
When charging current drops to 1/10 (60mA) of program current, charge cycle terminates, and charging circuit is latched cut out, and at this moment LTC4054 enters standby mode, and mains input current is down to 200uA;
In stand-by mode, LTC4054 constantly monitors BAT pin voltage, when this voltage drop is to when charge threshold voltage (4.05V), then automatically recharges state, to ensure that battery is in full power state all the time.
Structure of the present invention is simple, practical.
Accompanying drawing explanation
Fig. 1 is that lithium of the present invention is from battery charger;
Fig. 2 is the schematic flow sheet of LTC4054 charging process of the present invention.
Embodiment
With reference to Fig. 1-2, a kind of battery charger and charging method thereof, it is characterized in that battery charger comprises the Programmable Logic Controller that model is LTC4054, the filter capacitor of a 1uF and a R31 is the resistance of 1.65K, LTC4054 has five serial ports, the filter capacitor of serial ports VCC and 1uF is connected, and serial ports PROG and R31 is connected.
Battery charger charging method step is as follows:
When charging voltage Vcc is higher than LTC4054 internal under-pressure lock-up valve 200mV, undervoltage lockout circuit is activated, and now when Vcc is higher than cell voltage 100mV, charging starts;
If now BAT pin voltage is lower than 2.9V, then charging enters precharge (trickle charge) state, at this moment charging current is 1/10 (60mA) of program current value, and this electric current ensures that battery reaches safe voltage levvl when entering constant current charge, extends the useful life of battery;
When BAT pin voltage is increased to more than 2.9V, LTC4054 enters constant current charging mode, and the size of this charging current is program current (600mA);
When the voltage of BAT pin reaches final floating voltage (4.2V), LTC4054 enters constant voltage charge pattern, and charging current starts to decline;
When charging current drops to 1/10 (60mA) of program current, charge cycle terminates, and charging circuit is latched cut out, and at this moment LTC4054 enters standby mode, and mains input current is down to 200uA;
In stand-by mode, LTC4054 constantly monitors BAT pin voltage, when this voltage drop is to when charge threshold voltage (4.05V), then automatically recharges state, to ensure that battery is in full power state all the time.
Claims (2)
1. a battery charger and charging method thereof, it is characterized in that battery charger comprises the Programmable Logic Controller that model is LTC4054, the filter capacitor of a 1uF and a R31 is the resistance of 1.65K, LTC4054 has five serial ports, serial ports VCC(4) be connected with the filter capacitor of 1uF, serial ports PROG(5) be connected with R31.
2. a kind of battery charger according to claim 1 and charging method thereof, is characterized in that battery charger charging method step is as follows:
When charging voltage Vcc is higher than LTC4054 internal under-pressure lock-up valve 200mV, undervoltage lockout circuit is activated, and now when Vcc is higher than cell voltage 100mV, charging starts;
If now BAT pin voltage is lower than 2.9V, then charging enters precharge (trickle charge) state, at this moment charging current is 1/10 (60mA) of program current value, and this electric current ensures that battery reaches safe voltage levvl when entering constant current charge, extends the useful life of battery;
When BAT pin voltage is increased to more than 2.9V, LTC4054 enters constant current charging mode, and the size of this charging current is program current (600mA);
When the voltage of BAT pin reaches final floating voltage (4.2V), LTC4054 enters constant voltage charge pattern, and charging current starts to decline;
When charging current drops to 1/10 (60mA) of program current, charge cycle terminates, and charging circuit is latched cut out, and at this moment LTC4054 enters standby mode, and mains input current is down to 200uA;
In stand-by mode, LTC4054 constantly monitors BAT pin voltage, when this voltage drop is to when charge threshold voltage (4.05V), then automatically recharges state, to ensure that battery is in full power state all the time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510457726.2A CN105024431A (en) | 2015-07-30 | 2015-07-30 | Battery charging circuit and charging method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510457726.2A CN105024431A (en) | 2015-07-30 | 2015-07-30 | Battery charging circuit and charging method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105024431A true CN105024431A (en) | 2015-11-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510457726.2A Pending CN105024431A (en) | 2015-07-30 | 2015-07-30 | Battery charging circuit and charging method thereof |
Country Status (1)
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| CN (1) | CN105024431A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105515135A (en) * | 2016-02-19 | 2016-04-20 | 北京清川科技有限公司 | Charging circuit, charging state detecting method and charging device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201038802Y (en) * | 2007-05-31 | 2008-03-19 | 北京交通大学 | Multifunctional charger |
| CN101662162A (en) * | 2009-01-23 | 2010-03-03 | 深圳市福嘉太科技有限公司 | Current amplification quick charge circuit used for hand-hold electronic device |
| CN202353849U (en) * | 2011-09-16 | 2012-07-25 | 南京师范大学 | Control circuit of Light emitting diode (LED) lamps for miners |
| CN203800663U (en) * | 2014-04-01 | 2014-08-27 | 江苏东润光伏科技有限公司 | Mobile power supply |
-
2015
- 2015-07-30 CN CN201510457726.2A patent/CN105024431A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201038802Y (en) * | 2007-05-31 | 2008-03-19 | 北京交通大学 | Multifunctional charger |
| CN101662162A (en) * | 2009-01-23 | 2010-03-03 | 深圳市福嘉太科技有限公司 | Current amplification quick charge circuit used for hand-hold electronic device |
| CN202353849U (en) * | 2011-09-16 | 2012-07-25 | 南京师范大学 | Control circuit of Light emitting diode (LED) lamps for miners |
| CN203800663U (en) * | 2014-04-01 | 2014-08-27 | 江苏东润光伏科技有限公司 | Mobile power supply |
Non-Patent Citations (1)
| Title |
|---|
| 李健: "锂电池线性充电管理芯片LTC4054及其应用", 《重庆教育学院学报》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105515135A (en) * | 2016-02-19 | 2016-04-20 | 北京清川科技有限公司 | Charging circuit, charging state detecting method and charging device |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20151104 |
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| RJ01 | Rejection of invention patent application after publication |