CN203632326U - Constant current constant voltage charging circuit - Google Patents
Constant current constant voltage charging circuit Download PDFInfo
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- CN203632326U CN203632326U CN201320879947.5U CN201320879947U CN203632326U CN 203632326 U CN203632326 U CN 203632326U CN 201320879947 U CN201320879947 U CN 201320879947U CN 203632326 U CN203632326 U CN 203632326U
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- 238000010281 constant-current constant-voltage charging Methods 0.000 title claims abstract description 14
- 238000007600 charging Methods 0.000 claims abstract description 10
- 239000003381 stabilizer Substances 0.000 claims description 9
- 230000000087 stabilizing effect Effects 0.000 claims description 9
- 238000001514 detection method Methods 0.000 abstract 5
- 230000000694 effects Effects 0.000 description 3
- 230000007812 deficiency Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model discloses a constant current constant voltage charging circuit which is used for charging a battery BT1 and comprises a constant current control unit, a detection unit and a constant voltage control unit. An input end of the constant current control unit and an input end of the constant voltage control unit are respectively connected with the anode and the cathode of a direct current power supply. An output end of the constant current control unit is connected with a first port of the detection unit. An output of the constant voltage control unit is connected with a second port of the detection unit. A third port of the detection unit is connected with the anode of the battery BT1, and a fourth port of the detection unit is connected with the cathode of the battery BT1. The constant current constant voltage charging circuit is characterized by achieving a function of constant current constant voltage charging, only requiring a few components, and being simple and reliable in circuit implementation.
Description
Technical field
The utility model relates to power-supply battery charging technique field, more specifically, relates to a kind of constant-current constant-voltage charging circuit.
Background technology
At present, there is a large amount of digital products, need use battery, and battery used all needs to charge.Have in the market a large amount of chargers, but effect not fine, be generally the simple function of constant current or constant voltage; Constant current charge is generally by regularly controlling, uncontrollable on the big or small time of battery discharge degree like this, easily makes over-charging of battery or sufficient, is difficult to control the level of charge of battery.Constant voltage charge can overcome the deficiency of constant current charge, if but charging when battery discharge is darker can cause damage to charging circuit.Because voltage is low, electric current is larger, also large to the loss of battery, and easily heating gasification, accelerates the inefficacy of battery.
Summary of the invention
The purpose of this utility model is in order to solve above-mentioned proposed problem, a kind of reliable and practical constant-current constant-voltage charging circuit is provided, this charging circuit combines constant current charge and constant voltage charge cleverly, effectively avoids constant current charge and constant voltage charge deficiency separately.
The purpose of this utility model can be by taking following technical scheme to reach:
A kind of constant-current constant-voltage charging circuit, for to battery BT1 charging, comprises constant current control unit, detecting unit and constant voltage control unit; The input of constant current control unit and constant voltage control unit connects respectively the both positive and negative polarity of DC power supply, the first port of the output termination detecting unit of constant current control unit, the second port of the output termination detecting unit of constant voltage control unit, the 3rd port of detecting unit connects the positive pole of battery BT1, and the 4th port connects the negative pole of battery BT1.
While starting to charge, battery BT1 voltage is lower, now adopts constant current charge, in the time that voltage is charged to certain altitude value, changes into constant voltage charge.
In the preferred scheme of one, described constant current control unit comprises adjustable voltage stabilizer IC1, resistance R 2 and the resistance R 5 of three ports, the positive pole of DC power supply connects the Vin port of adjustable voltage stabilizer IC1, and the Vout port of adjustable voltage stabilizer IC1 and ADJ port connect respectively the first port of detecting unit by resistance R 2, resistance R 5.
In the preferred scheme of one, described constant voltage control unit comprises resistance R 1, triode Q1 and voltage stabilizing didoe ZD1, the negative pole of DC power supply connects the emitter of triode Q1, the emitter of triode Q1 connects the ADJ port of constant current control unit by resistance R 1, the base stage of triode Q1 connects the positive pole of voltage stabilizing didoe ZD1, the negative pole of voltage stabilizing didoe ZD1 connects the second port of detecting unit, the negative pole of the emitter battery BT1 of triode Q1.
In the preferred scheme of one, described detecting unit comprises diode D1, resistance R 3 and resistance R 4, the positive pole of battery BT1 connects the negative pole of diode D1, and the positive pole of diode D1 is by one end of resistance R 3 connecting resistance R4, the negative pole of another termination battery BT1 of resistance R 4; One end of resistance R 4 is the second port of detecting unit, the first port of the just very detecting unit of diode D1.
Compared with prior art, the beneficial effects of the utility model are: adopt several conventional electronic components to connect, can realize constant-current constant-voltage charging simultaneously, greatly improved the cost performance of product.
Accompanying drawing explanation
Fig. 1 is the schematic diagram that the utlity model has the charging circuit of constant current constant voltage.
Embodiment
Below in conjunction with accompanying drawing, the present invention will be further described, but embodiments of the present invention are not limited to this.
As Fig. 1, a kind of constant-current constant-voltage charging circuit, for to battery BT1 charging, comprises constant current control unit 1, constant voltage control unit 2 and detecting unit 3; The input of constant current control unit 1 and constant voltage control unit 2 connects respectively the both positive and negative polarity of DC power supply, the first port of the output termination detecting unit 3 of constant current control unit 1, the second port of the output termination detecting unit 3 of constant voltage control unit 2, the 3rd port of detecting unit 3 connects the positive pole of battery BT1, and the 4th port connects the negative pole of battery BT1.
Wherein constant current control unit 1 comprises adjustable voltage stabilizer IC1, resistance R 2 and the resistance R 5 of three ports, and constant voltage control unit 2 comprises resistance R 1, triode Q1 and voltage stabilizing didoe ZD1, and detecting unit 3 comprises diode D1, resistance R 3 and resistance R 4; The anodal DC+ of DC power supply connects the Vin port of adjustable voltage stabilizer IC1, and the Vout port of adjustable voltage stabilizer IC1 and ADJ port connect respectively the first port of detecting unit 3 by resistance R 2, resistance R 5, and this first port is the positive pole of diode D1.
The negative pole DC-of DC power supply connects the emitter of triode Q1, the emitter of triode Q1 connects the ADJ port of constant current control unit 1 by resistance R 1, the base stage of triode Q1 connects the positive pole of voltage stabilizing didoe ZD1, the negative pole of voltage stabilizing didoe ZD1 connects the second port of detecting unit 3, this second port is to draw between resistance R 3 from being connected in series, R4, the negative pole of the emitter battery BT1 of triode Q1.
The positive pole of battery BT1 connects the negative pole of diode D1, and the negative pole of this diode D1 is the 3rd port, and the positive pole of diode D1 is by one end of resistance R 3 connecting resistance R4, the negative pole of another termination battery BT1 of resistance R 4; One end of resistance R 4 is the second port of detecting unit 3, the first port of the just very detecting unit 3 of diode D1.
Above-mentioned constant current control unit 1 is the effect that realizes current constant; Constant voltage control unit 3 is to realize voltage constant effect.
With reference to Fig. 1, its specific works mode is: power supply is from DC+ and DC-access direct voltage, and battery BT1 positive pole is received the negative pole of D1 diode, and battery BT1 negative pole is received power supply DC-.In the time that the electric weight of battery is not enough, battery BT1 both end voltage is lower, after R3 and R4 dividing potential drop, cannot conducting ZD1, and triode Q1 is in cut-off state.Now IC1 and the work of R2 composition constant-current circuit, give battery BT1 constant current charge; In the time that cell voltage rises to battery nominal voltage gradually, after R3 and R4 dividing potential drop, make ZD1 conducting, triode Q1 conducting, moves the ADJ end of IC1 to ground by R1, realizes like this constant voltage charge of realizing dividing potential drop sampling with R1 and R5.
Above-described embodiments of the present invention, do not form limiting the scope of the present invention.Any modification of having done within spiritual principles of the present invention, be equal to and replace and improvement etc., within all should being included in claim protection range of the present invention.
Claims (4)
1. a constant-current constant-voltage charging circuit, for to battery BT1 charging, is characterized in that, comprises constant current control unit (1), constant voltage control unit (2) and detecting unit (3); The input of constant current control unit (1) and constant voltage control unit (2) connects respectively the both positive and negative polarity of DC power supply, the first port of the output termination detecting unit (3) of constant current control unit (1), the second port of the output termination detecting unit (3) of constant voltage control unit (2), the 3rd port of detecting unit (3) connects the positive pole of battery BT1, and the 4th port connects the negative pole of battery BT1.
2. constant-current constant-voltage charging circuit according to claim 1, it is characterized in that, described constant current control unit (1) comprises adjustable voltage stabilizer IC1, resistance R 2 and the resistance R 5 of three ports, the positive pole of DC power supply connects the Vin port of adjustable voltage stabilizer IC1, and the Vout port of adjustable voltage stabilizer IC1 and ADJ port connect respectively the first port of detecting unit (3) by resistance R 2, resistance R 5.
3. constant-current constant-voltage charging circuit according to claim 1, it is characterized in that, described constant voltage control unit (2) comprises resistance R 1, triode Q1 and voltage stabilizing didoe ZD1, the negative pole of DC power supply connects the emitter of triode Q1, the emitter of triode Q1 connects the ADJ port of constant current control unit (1) by resistance R 1, the base stage of triode Q1 connects the positive pole of voltage stabilizing didoe ZD1, the negative pole of voltage stabilizing didoe ZD1 connects the second port of detecting unit (3), the negative pole of the emitter battery BT1 of triode Q1.
4. constant-current constant-voltage charging circuit according to claim 1, it is characterized in that, described detecting unit (3) comprises diode D1, resistance R 3 and resistance R 4, the positive pole of battery BT1 connects the negative pole of diode D1, the positive pole of diode D1 is by one end of resistance R 3 connecting resistance R4, the negative pole of another termination battery BT1 of resistance R 4; One end of resistance R 4 is the second port of detecting unit (3), the first port of the just very detecting unit (3) of diode D1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320879947.5U CN203632326U (en) | 2013-12-30 | 2013-12-30 | Constant current constant voltage charging circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320879947.5U CN203632326U (en) | 2013-12-30 | 2013-12-30 | Constant current constant voltage charging circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203632326U true CN203632326U (en) | 2014-06-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320879947.5U Expired - Lifetime CN203632326U (en) | 2013-12-30 | 2013-12-30 | Constant current constant voltage charging circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN203632326U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106469933A (en) * | 2015-08-05 | 2017-03-01 | 江苏爱福特科技开发有限公司 | A kind of battery charger |
-
2013
- 2013-12-30 CN CN201320879947.5U patent/CN203632326U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106469933A (en) * | 2015-08-05 | 2017-03-01 | 江苏爱福特科技开发有限公司 | A kind of battery charger |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140604 |