CN204597570U - A kind of lithium battery charger circuit structure - Google Patents
A kind of lithium battery charger circuit structure Download PDFInfo
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- CN204597570U CN204597570U CN201520319018.8U CN201520319018U CN204597570U CN 204597570 U CN204597570 U CN 204597570U CN 201520319018 U CN201520319018 U CN 201520319018U CN 204597570 U CN204597570 U CN 204597570U
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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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Abstract
The utility model belongs to charger technologies field, be specifically related to a kind of lithium battery charger circuit structure, comprise single-chip microcomputer, voltage detecting circuit, current detection circuit, battery status indicating circuit and charging control circuit, single-chip microcomputer comprises voltage analog translation interface, current analog translation interface, indicator light driving interface and pulse modulation charging control interface; Voltage detecting circuit is connected with single-chip microcomputer by voltage analog translation interface, current detection circuit is connected with single-chip microcomputer by current analog translation interface, battery status indicating circuit drives interface to be connected with single-chip microcomputer by indicator light, and charging control circuit is connected with single-chip microcomputer by pulse modulation charging control interface.The utility model accurately can measure the current electric current and voltage state of lithium battery, optimize the process to lithium battery precharge, constant current charge, constant voltage charge and trickle charge, to provide rational voltage and current value to charge to lithium battery, extend the useful life of lithium battery, improve charge efficiency.
Description
Technical field
The utility model belongs to charger technologies field, is specifically related to a kind of lithium battery charger circuit structure.
Background technology
Lithium battery have discharge stability, working temperature wide, allow that larger charging current, charging rate are fast, memory-less effect, self-discharge rate are low, storage life is long, energy is high, storage power density is large and output voltage advantages of higher and being used widely.
Meanwhile, also there are some shortcomings in lithium battery, and wherein well known is can not overcharge to lithium battery, (call in the following text and overcharge), if charging voltage is greater than rated current higher than assigned voltage or charging current, lithium battery will be caused to damage, make it to scrap.Under serious conditions, after overcharging, superfluous energy can make lithium battery temperature rise, and decomposition is produced gas by electrolyte, presses and rise and cause spontaneous combustion or the danger of breaking in making it.
In order to prevent over-charge of lithium battery; common way adds protective circuit on lithium battery charger; by measuring the current electric current and voltage state of lithium battery; charging process is divided into: these four root phases of precharge, constant current charge, constant voltage charge and trickle charge, thus prevents from overcharging lithium battery.But the lithium battery charger on market is very different, mostly accurately can not measure the electric current and voltage of lithium battery, still overcharging of lithium battery is caused, be not full of lithium battery, and due to coarse measurement, make four root phases of charging not obtain reasonable coordination, thus reduce charge efficiency, extend the charging interval.
Utility model content
The purpose of this utility model is: for the deficiencies in the prior art, a kind of lithium battery charger circuit structure is provided, accurately can measure the electric current and voltage state that lithium battery is current, thus the voltage and current value current according to lithium battery, enter corresponding charge mode.
To achieve these goals, the utility model adopts following technical scheme:
A kind of lithium battery charger circuit structure, comprise single-chip microcomputer, voltage detecting circuit, current detection circuit, battery status indicating circuit and charging control circuit, described single-chip microcomputer comprises voltage analog translation interface, current analog translation interface, indicator light driving interface and pulse modulation charging control interface;
Described voltage detecting circuit is connected with described single-chip microcomputer by described voltage analog translation interface, described current detection circuit is connected with described single-chip microcomputer by described current analog translation interface, described battery status indicating circuit drives interface to be connected with described single-chip microcomputer by described indicator light, and described charging control circuit is connected with single-chip microcomputer by described pulse modulation charging control interface.
As the improvement of a kind of lithium battery charger circuit structure of the utility model, described voltage detecting circuit comprises voltage detecting regulating resistance and voltage detecting operational amplifier.
As the improvement of a kind of lithium battery charger circuit structure of the utility model, the resistance adjustable extent of described voltage detecting regulating resistance is 0 ~ 20K Ω, and described voltage detecting operational amplifier model is LM324.
As the improvement of a kind of lithium battery charger circuit structure of the utility model, described current detection circuit comprises current sense resistor and current detecting operational amplifier.
As the improvement of a kind of lithium battery charger circuit structure of the utility model, the specification of described current sense resistor is 1 Ω/1W, and the model of described current detecting operational amplifier is LM324.
As the improvement of a kind of lithium battery charger circuit structure of the utility model, described battery status indicating circuit comprises status indicator lamp and indicator light resistance, described indicator light resistance one end drives interface to be connected with described indicator light, and the other end is connected with described status indicator lamp.
As the improvement of a kind of lithium battery charger circuit structure of the utility model, described status indicator lamp comprises the first status indicator lamp and the second status indicator lamp, described indicator light resistance comprises the first indicator light resistance and the second indicator light resistance, described indicator light drives interface to comprise the first indicator light and drives interface and the second indicator light driving interface, the two ends of described first indicator light resistance drive interface to be connected with described first status indicator lamp and described first indicator light respectively, the two ends of described second indicator light resistance drive interface to be connected with described second status indicator lamp and described second indicator light respectively.
As the improvement of a kind of lithium battery charger circuit structure of the utility model, described charging control circuit comprises charging first resistance, second resistance that charges, NPN type triode, PNP type triode, charging first diode, second diode that charges, inductor and charging regulating resistance, described charging first resistance one end connects described pulse modulation charging control interface, the other end of described charging first resistance is connected with the base stage of described NPN type triode, one end of described charging second resistance is connected with the collector electrode of described NPN type triode, the other end of described charging second resistance is connected with the base stage of described PNP type triode, the anode of described charging first diode is connected with the emitter of described NPN type triode, the negative electrode of described charging first diode is connected with the collector electrode of described PNP type triode, one end of described inductor is connected with the collector electrode of described PNP type triode, the other end of described inductor is connected with the anode of described charging second diode, one end of described charging regulating resistance is connected with power supply, the other end of described charging regulating resistance is connected with the emitter of described NPN type triode, the adjustable end of described charging regulating resistance is connected with the anode of described charging second diode.
As the improvement of a kind of lithium battery charger circuit structure of the utility model, described charging control circuit also comprises charging the 3rd resistance and charging the 4th resistance, the two ends of described charging the 3rd resistance are connected with the base stage of described NPN type triode and emitter respectively, and the two ends of described charging the 4th resistance are connected with the base stage of described PNP type triode and emitter respectively.
As the improvement of a kind of lithium battery charger circuit structure of the utility model, described charging control circuit also comprises polar capacitor, the positive pole of described polar capacitor is connected with the anode of described charging second diode, and the negative pole of described polar capacitor is connected with the emitter of described NPN type triode.
The beneficial effects of the utility model are: provide a kind of lithium battery charger circuit structure, comprise single-chip microcomputer, voltage detecting circuit, current detection circuit, battery status indicating circuit and charging control circuit, under the control of single-chip microcomputer, make voltage detecting circuit, current detection circuit, cooperatively interact between battery status indicating circuit and charging control circuit, realize the intelligentized control method of lithium cell charging, accurately can measure the electric current and voltage state that lithium battery is current, optimize lithium battery precharge, constant current charge, the process of constant voltage charge and trickle charge, to provide rational voltage and current value, lithium battery is charged, extend the useful life of lithium battery, improve charge efficiency, shorten the charging interval.
Accompanying drawing explanation
Fig. 1 is circuit structure diagram of the present utility model.
Wherein, U1. single-chip microcomputer, U2. voltage detecting operational amplifier, U3. current detecting operational amplifier, CKT1. voltage detecting circuit, CKT2. current detection circuit, CKT3. battery status indicating circuit, CKT4. charging control circuit, PC5. voltage analog translation interface, PC4. current analog translation interface, PD0. the first indicator light drives interface, PD1. the second indicator light drives interface, PB2. pulse modulation charging control interface, R1. charge regulating resistance, R2. voltage detecting regulating resistance, R3. current sense resistor, R4. the first indicator light resistance, R5. the second indicator light resistance, R6. charge the first resistance, R7. charge the second resistance, R8. charge the 3rd resistance, R9. charge the 4th resistance, LT1. the first status indicator lamp, LT2. the second status indicator lamp, Q1.NPN type triode, Q2.PNP type triode, D1. charge the first diode, D2. charge the second diode, L. inductor, C. polar capacitor.
Embodiment
Below in conjunction with embodiment and Figure of description, the utility model and beneficial effect thereof are described in further detail, but embodiment of the present utility model is not limited thereto.
As shown in Figure 1, a kind of lithium battery charger circuit structure, comprise single-chip microcomputer U1, voltage detecting circuit CKT1, current detection circuit CKT2, battery status indicating circuit CKT3 and charging control circuit CKT4, single-chip microcomputer U1 comprises voltage analog translation interface PC5, current analog translation interface PC4, indicator light drives interface and pulse modulation charging control interface PB2;
Voltage detecting circuit CKT1 is connected with single-chip microcomputer U1 by voltage analog translation interface PC5, current detection circuit CKT2 is connected with single-chip microcomputer U1 by current analog translation interface PC4, battery status indicating circuit CKT3 drives interface to be connected with single-chip microcomputer U1 by indicator light, and charging control circuit CKT4 is connected with single-chip microcomputer U1 by pulse modulation charging control interface PB2.
Wherein, voltage detecting circuit CKT1 comprises voltage detecting regulating resistance R2 and voltage detecting operational amplifier U2, and the resistance adjustable extent of voltage detecting regulating resistance R2 is 0 ~ 20K Ω, and voltage detecting operational amplifier U2 model is LM324.The specification that current detection circuit CKT2 comprises current sense resistor R3 and current detecting operational amplifier U3, current sense resistor R3 is 1 Ω/1W, and the model of current detecting operational amplifier U3 is LM324.
Battery status indicating circuit CKT3 comprises status indicator lamp and indicator light resistance, status indicator lamp comprises the first status indicator lamp LT1 and the second status indicator lamp LT2, indicator light resistance comprises the first indicator light resistance R4 and the second indicator light resistance R5, indicator light drives interface to comprise the first indicator light and drives interface PD0 and the second indicator light driving interface PD1, the two ends of the first indicator light resistance R4 drive interface PD0 to be connected with the first status indicator lamp LT1 and the first indicator light respectively, the two ends of the second indicator light resistance R5 drive interface PD1 to be connected with the second status indicator lamp LT2 and the second indicator light respectively.
Charging control circuit CKT4 comprises charging first resistance R6, the second resistance R7 that charges, charging the 3rd resistance R8, charging the 4th resistance R9, NPN type triode Q1, PNP type triode Q2, the first diode D1 that charges, charge the second diode D2, inductor L, charging regulating resistance R1 and polar capacitor C, charge first resistance R6 one end connection pulse modulation charging control interface PB2, the other end of the first resistance R6 of charging is connected with the base stage of NPN type triode Q1, charge one end of the second resistance R7 is connected with the collector electrode of NPN type triode Q1, the other end of the second resistance R7 of charging is connected with the base stage of PNP type triode Q2, the anode of the first diode D1 of charging is connected with the emitter of NPN type triode Q1, the negative electrode of the first diode D1 of charging is connected with the collector electrode of PNP type triode Q2, one end of inductor L is connected with the collector electrode of PNP type triode Q2, the other end of inductor L is connected with the anode of charging the second diode D2, one end of charging regulating resistance R1 is connected with power supply, the other end of charging regulating resistance R1 is connected with the emitter of NPN type triode Q1, the adjustable end of charging regulating resistance R1 is connected with the anode of charging the second diode D2, the charge two ends of the 3rd resistance R8 are connected with the base stage of NPN type triode Q1 and emitter respectively, the charge two ends of the 4th resistance R9 are connected with the base stage of PNP type triode Q2 and emitter respectively, the positive pole of polar capacitor C is connected with the anode of charging the second diode D2, the negative pole of polar capacitor C is connected with the emitter of NPN type triode Q1.
The announcement of book and instruction according to the above description, the utility model those skilled in the art can also change above-mentioned execution mode and revise.Therefore, the utility model is not limited to above-mentioned embodiment, and any apparent improvement of every those skilled in the art done by basis of the present utility model, replacement or modification all belong to protection range of the present utility model.In addition, although employ some specific terms in this specification, these terms just for convenience of description, do not form any restriction to the utility model.
Claims (10)
1. a lithium battery charger circuit structure, it is characterized in that: comprise single-chip microcomputer, voltage detecting circuit, current detection circuit, battery status indicating circuit and charging control circuit, described single-chip microcomputer comprises voltage analog translation interface, current analog translation interface, indicator light driving interface and pulse modulation charging control interface;
Described voltage detecting circuit is connected with described single-chip microcomputer by described voltage analog translation interface, described current detection circuit is connected with described single-chip microcomputer by described current analog translation interface, described battery status indicating circuit drives interface to be connected with described single-chip microcomputer by described indicator light, and described charging control circuit is connected with single-chip microcomputer by described pulse modulation charging control interface.
2. a kind of lithium battery charger circuit structure according to claim 1, is characterized in that: described voltage detecting circuit comprises voltage detecting regulating resistance and voltage detecting operational amplifier.
3. a kind of lithium battery charger circuit structure according to claim 2, is characterized in that: the resistance adjustable extent of described voltage detecting regulating resistance is 0 ~ 20K Ω, and described voltage detecting operational amplifier model is LM324.
4. a kind of lithium battery charger circuit structure according to claim 1, is characterized in that: described current detection circuit comprises current sense resistor and current detecting operational amplifier.
5. a kind of lithium battery charger circuit structure according to claim 4, is characterized in that: the model of described current detecting operational amplifier is LM324.
6. a kind of lithium battery charger circuit structure according to claim 1, it is characterized in that: described battery status indicating circuit comprises status indicator lamp and indicator light resistance, described indicator light resistance one end drives interface to be connected with described indicator light, and the other end is connected with described status indicator lamp.
7. a kind of lithium battery charger circuit structure according to claim 6, it is characterized in that: described status indicator lamp comprises the first status indicator lamp and the second status indicator lamp, described indicator light resistance comprises the first indicator light resistance and the second indicator light resistance, described indicator light drives interface to comprise the first indicator light and drives interface and the second indicator light driving interface, the two ends of described first indicator light resistance drive interface to be connected with described first status indicator lamp and described first indicator light respectively, the two ends of described second indicator light resistance drive interface to be connected with described second status indicator lamp and described second indicator light respectively.
8. a kind of lithium battery charger circuit structure according to claim 1, is characterized in that: described charging control circuit comprises charging first resistance, second resistance that charges, NPN type triode, PNP type triode, charging first diode, second diode that charges, inductor and charging regulating resistance;
Described charging first resistance one end connects described pulse modulation charging control interface, the other end of described charging first resistance is connected with the base stage of described NPN type triode, one end of described charging second resistance is connected with the collector electrode of described NPN type triode, the other end of described charging second resistance is connected with the base stage of described PNP type triode, the anode of described charging first diode is connected with the emitter of described NPN type triode, the negative electrode of described charging first diode is connected with the collector electrode of described PNP type triode, one end of described inductor is connected with the collector electrode of described PNP type triode, the other end of described inductor is connected with the anode of described charging second diode, one end of described charging regulating resistance is connected with power supply, the other end of described charging regulating resistance is connected with the emitter of described NPN type triode, the adjustable end of described charging regulating resistance is connected with the anode of described charging second diode.
9. a kind of lithium battery charger circuit structure according to claim 8, it is characterized in that: described charging control circuit also comprises charging the 3rd resistance and charging the 4th resistance, the two ends of described charging the 3rd resistance are connected with the base stage of described NPN type triode and emitter respectively, and the two ends of described charging the 4th resistance are connected with the base stage of described PNP type triode and emitter respectively.
10. a kind of lithium battery charger circuit structure according to claim 8, it is characterized in that: described charging control circuit also comprises polar capacitor, the positive pole of described polar capacitor is connected with the anode of described charging second diode, and the negative pole of described polar capacitor is connected with the emitter of described NPN type triode.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520319018.8U CN204597570U (en) | 2015-05-18 | 2015-05-18 | A kind of lithium battery charger circuit structure |
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| CN201520319018.8U CN204597570U (en) | 2015-05-18 | 2015-05-18 | A kind of lithium battery charger circuit structure |
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| CN204597570U true CN204597570U (en) | 2015-08-26 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106972557A (en) * | 2017-03-18 | 2017-07-21 | 海汽电子技术芜湖股份有限公司 | Motor vehicle module NI MH battery intelligents charging circuits and charging implementation method |
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2015
- 2015-05-18 CN CN201520319018.8U patent/CN204597570U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106972557A (en) * | 2017-03-18 | 2017-07-21 | 海汽电子技术芜湖股份有限公司 | Motor vehicle module NI MH battery intelligents charging circuits and charging implementation method |
| CN106972557B (en) * | 2017-03-18 | 2024-03-15 | 海汽电子技术芜湖股份有限公司 | NI-MH battery intelligent charging circuit for automobile module and charging realization method |
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