CN205092640U - Miniature balance control battery charging unit - Google Patents
Miniature balance control battery charging unit Download PDFInfo
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- CN205092640U CN205092640U CN201520873168.3U CN201520873168U CN205092640U CN 205092640 U CN205092640 U CN 205092640U CN 201520873168 U CN201520873168 U CN 201520873168U CN 205092640 U CN205092640 U CN 205092640U
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Abstract
The utility model discloses a miniature balance control battery charging unit, including the ACDC converter, control chip U1 and adjustable output stabiliser U2 charge. Adjustable steady voltage U2 sees the current sample signal off constant current source through adjustable output stabiliser, but through adjustable voltage stabilizer greatly increased interference killing feature, more makes the back level circuit to be more convenient for adjusting, the control chip U1 that charges reaches the output preset value with the constant current source of preceding one -level, carries out corresponding adjustment, plays the control unit and is connected the effect with the isolation between the main power supply voltage feedback circuit. The utility model relates to a miniature balance control battery charging unit voltage application scope is wide, and charge efficiency is high, fast, adopt miniature modular structure mode, characteristics such as having small, light in weight, conveniently carry, charging current output is stable.
Description
Technical field
The utility model relates to a kind of charging circuit, specifically, relates to a kind of miniature balance and controls charhing unit.
Background technology
In recent years, due to mobile device miniaturization, must ensure rechargeable battery also meet portable type electronic product at volume not, lightweight, conversion efficiency is high and stand-by time long etc. in requirement, thus with mobile phone, panel computer, digital photographing apparatus etc. for all needing microminiaturized charge controller in the portable type electronic product of representative.But on the other hand, rechargeable battery needs to use high accuracy charging control circuit.In traditional design, most charging circuit adopts one-level operational amplifier to compare the feedback network controlling main circuit, but require in traditional design that current sampling signal is higher, cause output voltage loss larger, sampled signal differs more with reference voltage in addition, and the more difficult control of the regulation of electrical circuit, exists the features such as temperature drift is large, cause that its volume is comparatively large and current sampling voltage is high, pressure drop is large, low precision, the shortcomings such as poor anti jamming capability.
Utility model content
The miniature balance of the one that the utility model designs to solve the problems of the technologies described above just controls charhing unit.
The utility model solves the technical scheme that its technical problem adopts:
A kind of miniature balance controls charhing unit, comprises AC/DC converter, charge controlling chip U1 and adjustable output voltage stabilizer U2.Exchange input and export direct current after AC/DC converter, after filter capacitor C1 filtering, direct current positive pole is connected with the IN pin of adjustable output voltage stabilizer U2, direct current negative pole exports OUT-with charging and is connected, the OUT pin of adjustable output voltage stabilizer U2 is connected with the anode of diode VD1 by resistance R2, the negative electrode of diode VD1 exports OUT+ with charging and is connected, the OUT pin of adjustable output voltage stabilizer U2 is connected with resistance R3 mono-pin by resistance R2 simultaneously, and another pin of resistance R3 is connected with the ADJ pin of adjustable output voltage stabilizer U2; The IN pin of adjustable output voltage stabilizer U2 is connected with the base stage of triode VT1 by resistance R1, R6 of series connection, and the collector electrode of triode VT1 is connected with the negative electrode of diode VD1, and the emitter of triode VT1 is connected with the IN pin of charge controlling chip U1; The COMP pin of charge controlling chip U1 is connected with the OUT pin of charge controlling chip U1 by electric capacity C2, and the OUT pin of charge controlling chip U1 is connected with the base stage of triode VT2 by resistance R4, and the GND pin of charge controlling chip U1 exports OUT-with charging and is connected; The collector electrode of triode VT2 is connected with the ADJ pin of adjustable output voltage stabilizer U2, and the emitter of triode VT2 exports OUT-with charging and is connected; Filter capacitor C3 and C4 in parallel is connected across charging and exports between OUT+ and OUT-, and the negative electrode of diode VD2 exports OUT+ with charging and is connected, and the anode of diode VD2 exports OUT-with charging and is connected.
The miniature balance of described one controls charhing unit, and the model of its charge controlling chip U1 is LM3420-8.4, and the model of adjustable output voltage stabilizer U2 is LM317.
The miniature balance of described one controls charhing unit, and the model of its charge controlling chip U1 is LM3420-8.4, and the model of adjustable output voltage stabilizer U2 is LM350.
The miniature balance of described one controls charhing unit, and the model of its charge controlling chip U1 is LM3420-8.4, and the model of adjustable output voltage stabilizer U2 is LM338.
This miniature equilibrium charging unit charging voltage is applied widely, charge efficiency is high, speed is fast, by shell, charging circuit, output circuit with output constant voltage trickle charging circuit is integrated forms, adopt the frame mode of micromodule, have volume little, lightweight, be convenient for carrying, the feature such as charging current stable output.
1, operation principle
The utility model mainly comprises live part, adjustable voltage stabilization part, constant voltage trickle output, voltage control division grade composition.Live part mainly carries out AC/DC and is transformed to control circuit and provides direct current supply; Current sampling signal is sent constant current through adjustable output voltage stabilizer by adjustable voltage stabilization part, greatly can increase antijamming capability by adjustable voltage stabilizer, more makes late-class circuit be more convenient for adjusting; The constant current of previous stage is reached output preset value by voltage control part, adjusts accordingly, and plays the isolation connection function between control unit and main supply power voltage feedback circuit.
The utility model can charge to the Li-ion batteries piles of series connection.When battery voltage is lower than charging voltage, output (OUT) the no-output electric current of charging control unit LM3420, transistor VT2 ends, and adjustable output voltage stabilizer LM317 exports constant current, and its value is 1.25/R limit.The output-current rating of LM317 is 1.5A, if desired larger charge power supply, then can substitute with LM350 or LM338.In charging process, cell voltage constantly rises, and is detected by the input of LM3420-8.4 (IN).When cell voltage is raised to given voltage, LM3420 output current, make VT2 start the output voltage of control LM317, charger proceeds to constant voltage charge process, and cell voltage is stabilized in the voltage range of specifying.After this charging current starts to reduce, and after full charge, electric current drops to trickle-charge current.When input voltage Lu Luzhong has no progeny, transistor VT1 ends, and battery pack and LM3420 disconnect, and diode can avoid battery to be discharged by LM317, and electric capacity C3 can realize filtering.
2, the feature of device
1. function admirable, effectively improves reliability.
The utility model, for several shortcomings of conventional method, has carried out brand-new design and perfect.Thus it is high effectively to avoid current sampling voltage, pressure drop is large, low precision, the shortcomings such as poor anti jamming capability.Effectively improve control precision and reliability.
2. simple circuit, working stability.
The value of the corresponding device that the utility model only need calculate by former design theory assembles, and can meet the requirement of technical indicator.This circuit has higher antijamming capability simultaneously, and work that still can be stable under specific condition, by the fine setting to divider resistance, completes the adjustment to charged electrical flow point.
3. applied widely
The utility model, have volume little, lightweight, be convenient for carrying, the feature such as charging current stable output.Prevailing operating state by the impact of rear class equipment, has not widened its range of application.
The beneficial effect that a kind of miniature balance of the utility model controls charhing unit is that voltage is applied widely, and charge efficiency is high, speed is fast; Adopt micromodule frame mode, have volume little, lightweight, be convenient for carrying, the feature such as charging current stable output.
Accompanying drawing explanation
Fig. 1 is that a kind of miniature balance of the utility model controls charhing unit circuit theory diagrams.
Embodiment
Below in conjunction with drawings and Examples, the utility model is further illustrated.
As shown in Figure 1, a kind of miniature balance of the utility model controls charhing unit, comprises AC/DC converter, charge controlling chip U1 and adjustable output voltage stabilizer U2.Exchange input and export direct current after AC/DC converter, after filter capacitor C1 filtering, direct current positive pole is connected with the IN pin of adjustable output voltage stabilizer U2, direct current negative pole exports OUT-with charging and is connected, the OUT pin of adjustable output voltage stabilizer U2 is connected with the anode of diode VD1 by resistance R2, the negative electrode of diode VD1 exports OUT+ with charging and is connected, the OUT pin of adjustable output voltage stabilizer U2 is connected with resistance R3 mono-pin by resistance R2 simultaneously, and another pin of resistance R3 is connected with the ADJ pin of adjustable output voltage stabilizer U2; The IN pin of adjustable output voltage stabilizer U2 is connected with the base stage of triode VT1 by resistance R1, R6 of series connection, and the collector electrode of triode VT1 is connected with the negative electrode of diode VD1, and the emitter of triode VT1 is connected with the IN pin of charge controlling chip U1; The COMP pin of charge controlling chip U1 is connected with the OUT pin of charge controlling chip U1 by electric capacity C2, and the OUT pin of charge controlling chip U1 is connected with the base stage of triode VT2 by resistance R4, and the GND pin of charge controlling chip U1 exports OUT-with charging and is connected; The collector electrode of triode VT2 is connected with the ADJ pin of adjustable output voltage stabilizer U2, and the emitter of triode VT2 exports OUT-with charging and is connected; Filter capacitor C3 and C4 in parallel is connected across charging and exports between OUT+ and OUT-, and the negative electrode of diode VD2 exports OUT+ with charging and is connected, and the anode of diode VD2 exports OUT-with charging and is connected.
The miniature balance of described one controls charhing unit, and the model of its charge controlling chip U1 is LM3420-8.4, and the model of adjustable output voltage stabilizer U2 is LM317.
The miniature balance of described one controls charhing unit, and the model of its charge controlling chip U1 is LM3420-8.4, and the model of adjustable output voltage stabilizer U2 is LM350.
The miniature balance of described one controls charhing unit, and the model of its charge controlling chip U1 is LM3420-8.4, and the model of adjustable output voltage stabilizer U2 is LM338.
The utility model is not limited to above-mentioned preferred forms, anyone other any or akin products identical with the utility model drawn under enlightenment of the present utility model, all drops within protection range of the present utility model.
Claims (4)
1. miniature balance controls a charhing unit, comprises AC/DC converter, charge controlling chip U1 and adjustable output voltage stabilizer U2; It is characterized in that: exchange input and export direct current after AC/DC converter, after filter capacitor C1 filtering, direct current positive pole is connected with the IN pin of adjustable output voltage stabilizer U2, direct current negative pole exports OUT-with charging and is connected, the OUT pin of adjustable output voltage stabilizer U2 is connected with the anode of diode VD1 by resistance R2, the negative electrode of diode VD1 exports OUT+ with charging and is connected, the OUT pin of adjustable output voltage stabilizer U2 is connected with resistance R3 mono-pin by resistance R2 simultaneously, and another pin of resistance R3 is connected with the ADJ pin of adjustable output voltage stabilizer U2; The IN pin of adjustable output voltage stabilizer U2 is connected with the base stage of triode VT1 by resistance R1, R6 of series connection, and the collector electrode of triode VT1 is connected with the negative electrode of diode VD1, and the emitter of triode VT1 is connected with the IN pin of charge controlling chip U1; The COMP pin of charge controlling chip U1 is connected with the OUT pin of charge controlling chip U1 by electric capacity C2, and the OUT pin of charge controlling chip U1 is connected with the base stage of triode VT2 by resistance R4, and the GND pin of charge controlling chip U1 exports OUT-with charging and is connected; The collector electrode of triode VT2 is connected with the ADJ pin of adjustable output voltage stabilizer U2, and the emitter of triode VT2 exports OUT-with charging and is connected; Filter capacitor C3 and C4 in parallel is connected across charging and exports between OUT+ and OUT-, and the negative electrode of diode VD2 exports OUT+ with charging and is connected, and the anode of diode VD2 exports OUT-with charging and is connected.
2. the miniature balance of one according to claim 1 controls charhing unit, and it is characterized in that: the model of charge controlling chip U1 is LM3420-8.4, the model of adjustable output voltage stabilizer U2 is LM317.
3. the miniature balance of one according to claim 1 controls charhing unit, and it is characterized in that: the model of charge controlling chip U1 is LM3420-8.4, the model of adjustable output voltage stabilizer U2 is LM350.
4. the miniature balance of one according to claim 1 controls charhing unit, and it is characterized in that: the model of charge controlling chip U1 is LM3420-8.4, the model of adjustable output voltage stabilizer U2 is LM338.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520873168.3U CN205092640U (en) | 2015-11-04 | 2015-11-04 | Miniature balance control battery charging unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520873168.3U CN205092640U (en) | 2015-11-04 | 2015-11-04 | Miniature balance control battery charging unit |
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| Publication Number | Publication Date |
|---|---|
| CN205092640U true CN205092640U (en) | 2016-03-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520873168.3U Active CN205092640U (en) | 2015-11-04 | 2015-11-04 | Miniature balance control battery charging unit |
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| CN (1) | CN205092640U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106505706A (en) * | 2016-11-25 | 2017-03-15 | 上海电机学院 | Linear charging block based on integrated stable voltage circuit LM350 |
| CN109167402A (en) * | 2018-08-06 | 2019-01-08 | 北京长城华冠汽车科技股份有限公司 | Power battery charging control method and device |
-
2015
- 2015-11-04 CN CN201520873168.3U patent/CN205092640U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106505706A (en) * | 2016-11-25 | 2017-03-15 | 上海电机学院 | Linear charging block based on integrated stable voltage circuit LM350 |
| CN109167402A (en) * | 2018-08-06 | 2019-01-08 | 北京长城华冠汽车科技股份有限公司 | Power battery charging control method and device |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |