CN104269902A - Lithium battery charging circuit capable of fast and stably conducting charging - Google Patents
Lithium battery charging circuit capable of fast and stably conducting charging Download PDFInfo
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- CN104269902A CN104269902A CN201410534708.5A CN201410534708A CN104269902A CN 104269902 A CN104269902 A CN 104269902A CN 201410534708 A CN201410534708 A CN 201410534708A CN 104269902 A CN104269902 A CN 104269902A
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- resistance
- type triode
- charging
- pole
- variable resistor
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 26
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 26
- 230000000087 stabilizing effect Effects 0.000 claims description 19
- 230000000694 effects Effects 0.000 abstract description 5
- 230000006641 stabilisation Effects 0.000 abstract 3
- 238000011105 stabilization Methods 0.000 abstract 3
- 230000007423 decrease Effects 0.000 abstract 1
- 230000003247 decreasing effect Effects 0.000 abstract 1
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 3
- 229910001416 lithium ion Inorganic materials 0.000 description 3
- 229910052759 nickel Inorganic materials 0.000 description 3
- 230000036962 time dependent Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000003446 memory effect Effects 0.000 description 2
- 238000010561 standard procedure Methods 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
Classifications
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- H02J7/0072—
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a lithium battery charging circuit capable of fast and stably conducting charging. The lithium battery charging circuit comprises a charging indication circuit, an adjustable constant-current circuit and an adjustable voltage stabilization circuit. The charging indication circuit comprises a PNP type triode Q2, a resistor R2, a resistor R1, a resistor R4 and an LED 1. The adjustable voltage stabilization circuit comprises an NPN type triode Q1, a resistor R3, a variable resistor R5 and a voltage stabilization diode D1. The adjustable constant-current circuit comprises a PNP type triode Q3, a resistor R7 and a variable resistor R6. Due to the voltage dividing effect of the resistor R2, the voltage of the E electrode and the voltage of the B electrode of the PNP type triode Q2 are different, and the voltage difference is formed; the PNP type triode Q2 is in the connected state, as charging time goes by, the charging current can be gradually decreased while the voltage of a charged lithium battery gradually rises, the voltage drop on the resistor R2 gradually decreases after the battery is completely charged, and finally the PNP type triode Q2 is powered off. The current-variable charging system is easy to use, effective and capable of conducting charging at the gradually-decreasing speed.
Description
Technical field
The present invention relates to charging technique, specifically time-dependent current charging system first quick and back slow.
Background technology
In charging technique, present mobile phone be lithium ion battery, so, there is not memory effect problem, do not need to activate, first time charging does not need to rush more than 12 hours as nickel electricity, only needs to fill 4 hours yet, only there is relation in the life-span of ion battery with charging times, and lithium ion battery can charge about 1000 times.Stand-by time and service condition have relation.It should be noted in use lithium battery, battery then enters resting state after placing a period of time, and now capacity is lower than normal value, and service time also shortens thereupon.But lithium battery is easy to activate, as long as just can activated batteries through 3-5 subnormal charge and discharge cycles, recovery normal capacity.Due to the characteristic of lithium battery itself, determining it does not almost have memory effect.Therefore the new lithium battery in user mobile phone, in activation, is do not need special method and apparatus.Be not only like this in theory, from my practice, adopt standard method charging this " naturally activating " mode to be best from the beginning.
All formal technical data strictly are all emphasized to overcharge and can be caused huge injury to lithium battery, particularly liquid lithium ion battery with overdischarge.Thus charge best according to standard time and standard method charging, be not particularly performed for more than the overlength charging of 12 hours.In addition, the mobile phone of lithium battery or charger all can automatic stop functions after battery is full of, and there is not so-called " trickle " charging continuing more than 10 hours of nickel electricity charger.That is, if your lithium battery after filling, being placed on charger is also white filling.And we everybody cannot to ensure that the characteristic of the charge-discharge protection circuit of battery never changes with quality perfectly safe, so battery is hovered being in dangerous edge for a long time.This is also that we oppose long another reason of charging.This is external on some mobile phone, and after charging exceedes the regular hour, if do not go to take off charger, at this moment system does not only stop charging, also will start electric discharge-charging cycle.Perhaps the manufacturer of this way has its own object, but is obviously disadvantageous for the life-span of battery and mobile phone/charger.Meanwhile, long charging needs long time, often needs to carry out at night, and sees with the situation of China's electrical network, and the voltage at many local nights is all higher, and fluctuation is larger.Said above, lithium battery is very enervated, it more electric than nickel in discharge and recharge the ability of wave resistance very different, so this brings again additional danger.
Simultaneously in prior art, during charging, there are 2 kinds of methods.One adopts high-voltage high-speed charging, and this is totally unfavorable to the life-span of battery, and also have one to be adopt low pressure trickle charge, the charging interval of this mode is long.Above-mentioned two kinds of methods are all not suitable for the demand of current people.
summary of the invention
The object of the present invention is to provide a kind of simple, safety, effectively, the time-dependent current charging system first quick and back slow of low cost, can reach and first fill soon, the effect of rear trickle charge, can be automatically adjusted charging voltage grade simultaneously according to demand, prevent overvoltage to charge or cross low pressure charging, reaching ideal charging effect.
Object of the present invention is achieved through the following technical solutions: the lithium battery charging circuit of fast and stable charging, comprise charging indication, adjustable constant-flow circuit, adjustable voltage stabilizing circuit, wherein, charging indication comprises PNP type triode Q2, resistance R2, resistance R1, resistance R4, LED 1, the E pole of PNP type triode Q2 is connected with the input of resistance R2 accesses charge power supply VCC afterwards, the B pole of PNP type triode Q2 is connected with the input of resistance R1, resistance R4 is connected between the C pole of LED 1 and PNP type triode Q2, the output of LED 1 is connected on the positive pole of rechargeable battery C1, the output of resistance R2 is connected with the output of resistance R1 and forms tie point P, wherein, adjustable voltage stabilizing circuit comprises NPN type triode Q1, resistance R3, variable resistor R5, voltage stabilizing didoe D1, wherein, the C pole of NPN type triode Q1, the input of resistance R3 is connected to tie point P all simultaneously, the output of resistance R3 is connected to voltage stabilizing didoe D1, the output of resistance R3 is connected to the B pole of NPN type triode Q1 simultaneously, the E pole of NPN type triode Q1 is connected with 3 ends of variable resistor R5, 2 ends of variable resistor R5 connect and are connected with the B pole of NPN type triode Q1, the 1 end ground connection of variable resistor R5, voltage stabilizing didoe D1 ground connection, adjustable constant-flow circuit comprises PNP type triode Q3, resistance R7, variable resistor R6, 3 ends of variable resistor R6 are all connected with the B pole of PNP type triode Q3 with 2 ends, 1 end of variable resistor R6 connects the resistance R7 of ground connection, the E pole of PNP type triode Q3 is connected with the E pole of NPN type triode Q1, the C pole of PNP type triode Q3 is connected with the positive pole of rechargeable battery C1.
Design principle of the present invention is: the present invention utilizes NPN type triode Q1, resistance R3, variable resistor R5, voltage stabilizing didoe D1 to form accurate adjustable voltage stabilizing circuit.PNP type triode Q3, resistance R7, variable resistor R6 form adjustable constant-flow circuit.PNP type triode Q2, resistance R2, resistance R1, resistance R4, LED 1 form charging indication.Under the configuration state of foregoing circuit, due to the dividing potential drop effect of resistance R2, make the E pole of PNP type triode Q2 different with the voltage of B pole, coating-forming voltage is poor, PNP type triode Q2 is in conducting state, along with the propelling in charging interval, rise gradually along with by charged lithium cells voltage, charging current will reduce gradually, pressure drop after battery is full of on resistance R2 constantly reduces, finally make PNP type triode Q2 by, LED 1 extinguishes, in order to ensure that battery can be sufficient, charging 1 ~ 2 hour is continued after general indicator light extinguishes, need at Q2 during use, Q3 fills the fin of suitable size.Meanwhile, in foregoing circuit, the voltage difference due to the E pole of PNP type triode Q2 and B pole in initial condition is comparatively large, and therefore the charge rate in early stage is very fast, and along with the minimizing of voltage difference, charge rate slowly reduces.We can by adjustment variable resistor R6 and variable resistor R5 simultaneously, the voltage difference at controlling resistance R2 two ends is carried out with this, to adjust the speed of charging, after variable resistor R5 percentage resistance is turned down, charge rate is accelerated, after variable resistor R5 percentage resistance tunes up, charge rate is slack-off, adjustment variable resistor R6 can play the object of adjustment charging current, after variable resistor R6 percentage resistance is turned down, the charging current of rechargeable battery C1 increases, and after variable resistor R6 percentage resistance tunes up, the charging current of rechargeable battery C1 diminishes.Utilize above-mentioned away from, we can select oneself charging modes applicable, such as, when needing urgently needed, we select quick charge mode, the percentage resistance of adjustment variable resistor R5 is little, make charge rate increase, adjustment variable resistor R6 percentage resistance is turned down and the charging current of rechargeable battery C1 is increased simultaneously, reaches the object of quick charge.When we no hurry use rechargeable battery C1 time, we can adopt trickle charge pattern, adopt the charging modes of low current low rate to charge.
Preferably, described charge power supply VCC adopts the DC power supply of positive 12V.
Preferably, the resistance of resistance R2 is the little resistance resistors of 3.4 ohm or 5 ohm or 4 ohm.In order to make resistance R2 front-end and back-end between voltage difference can not be very large, therefore resistance R2 herein adopts the resistor of little resistance.Namely in order to the voltage difference of the E pole and B pole that make PNP type triode Q2 can not be very large, therefore resistance R2 herein adopts the resistor of little resistance.Be convenient to the cut-off controlling PNP type triode Q2 like this.
Preferably, rechargeable battery C1 is lithium battery.
Preferably, the adjustable Standard resistance range of variable resistor R5 is 0 to 20K ohm.
Preferably, the adjustable Standard resistance range of variable resistor R5 is 0 to 2K ohm.
The invention has the advantages that: structure is simple, and cost is low, simple and quick, can realize time-dependent current charging system first quick and back slow fast, easily.
Accompanying drawing explanation
Fig. 1 is the circuit state schematic diagram after charging complete.
Circuit state schematic diagram when Fig. 2 is charging beginning.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail, but embodiments of the present invention are not limited thereto.
Embodiment 1:
As Figure 1-Figure 2.
The lithium battery charging circuit of fast and stable charging, comprise charging indication, adjustable constant-flow circuit, adjustable voltage stabilizing circuit, wherein, charging indication comprises PNP type triode Q2, resistance R2, resistance R1, resistance R4, LED 1, the E pole of PNP type triode Q2 is connected with the input of resistance R2 accesses charge power supply VCC afterwards, the B pole of PNP type triode Q2 is connected with the input of resistance R1, resistance R4 is connected between the C pole of LED 1 and PNP type triode Q2, the output of LED 1 is connected on the positive pole of rechargeable battery C1, the output of resistance R2 is connected with the output of resistance R1 and forms tie point P, wherein, adjustable voltage stabilizing circuit comprises NPN type triode Q1, resistance R3, variable resistor R5, voltage stabilizing didoe D1, wherein, the C pole of NPN type triode Q1, the input of resistance R3 is connected to tie point P all simultaneously, the output of resistance R3 is connected to voltage stabilizing didoe D1, the output of resistance R3 is connected to the B pole of NPN type triode Q1 simultaneously, the E pole of NPN type triode Q1 is connected with 3 ends of variable resistor R5, 2 ends of variable resistor R5 connect and are connected with the B pole of NPN type triode Q1, the 1 end ground connection of variable resistor R5, voltage stabilizing didoe D1 ground connection, adjustable constant-flow circuit comprises PNP type triode Q3, resistance R7, variable resistor R6, 3 ends of variable resistor R6 are all connected with the B pole of PNP type triode Q3 with 2 ends, 1 end of variable resistor R6 connects the resistance R7 of ground connection, the E pole of PNP type triode Q3 is connected with the E pole of NPN type triode Q1, the C pole of PNP type triode Q3 is connected with the positive pole of rechargeable battery C1.
Design principle of the present invention is: the present invention utilizes NPN type triode Q1, resistance R3, variable resistor R5, voltage stabilizing didoe D1 to form accurate adjustable voltage stabilizing circuit.PNP type triode Q3, resistance R7, variable resistor R6 form adjustable constant-flow circuit.PNP type triode Q2, resistance R2, resistance R1, resistance R4, LED 1 form charging indication.Under the configuration state of foregoing circuit, due to the dividing potential drop effect of resistance R2, make the E pole of PNP type triode Q2 different with the voltage of B pole, coating-forming voltage is poor, PNP type triode Q2 is in conducting state, along with the propelling in charging interval, rise gradually along with by charged lithium cells voltage, charging current will reduce gradually, pressure drop after battery is full of on resistance R2 constantly reduces, finally make PNP type triode Q2 by, LED 1 extinguishes, in order to ensure that battery can be sufficient, charging 1 ~ 2 hour is continued after general indicator light extinguishes, need at Q2 during use, Q3 fills the fin of suitable size.Meanwhile, in foregoing circuit, the voltage difference due to the E pole of PNP type triode Q2 and B pole in initial condition is comparatively large, and therefore the charge rate in early stage is very fast, and along with the minimizing of voltage difference, charge rate slowly reduces.We can by adjustment variable resistor R6 and variable resistor R5 simultaneously, the voltage difference at controlling resistance R2 two ends is carried out with this, to adjust the speed of charging, after variable resistor R5 percentage resistance is turned down, charge rate is accelerated, after variable resistor R5 percentage resistance tunes up, charge rate is slack-off, adjustment variable resistor R6 can play the object of adjustment charging current, after variable resistor R6 percentage resistance is turned down, the charging current of rechargeable battery C1 increases, and after variable resistor R6 percentage resistance tunes up, the charging current of rechargeable battery C1 diminishes.Utilize above-mentioned away from, we can select oneself charging modes applicable, such as, when needing urgently needed, we select quick charge mode, the percentage resistance of adjustment variable resistor R5 is little, make charge rate increase, adjustment variable resistor R6 percentage resistance is turned down and the charging current of rechargeable battery C1 is increased simultaneously, reaches the object of quick charge.When we no hurry use rechargeable battery C1 time, we can adopt trickle charge pattern, adopt the charging modes of low current low rate to charge.
Preferably, described charge power supply VCC adopts the DC power supply of positive 12V.
Preferably, the resistance of resistance R2 is the little resistance resistors of 3.4 ohm or 5 ohm or 4 ohm.In order to make resistance R2 front-end and back-end between voltage difference can not be very large, therefore resistance R2 herein adopts the resistor of little resistance.Namely in order to the voltage difference of the E pole and B pole that make PNP type triode Q2 can not be very large, therefore resistance R2 herein adopts the resistor of little resistance.Be convenient to the cut-off controlling PNP type triode Q2 like this.
Preferably, rechargeable battery C1 is lithium battery.
Preferably, the adjustable Standard resistance range of variable resistor R5 is 0 to 20K ohm.
Preferably, the adjustable Standard resistance range of variable resistor R5 is 0 to 2K ohm.
As mentioned above, then well the present invention can be realized.
Claims (6)
1. the lithium battery charging circuit of fast and stable charging, it is characterized in that: comprise charging indication, adjustable constant-flow circuit, adjustable voltage stabilizing circuit, wherein, charging indication comprises PNP type triode Q2, resistance R2, resistance R1, resistance R4, LED 1, the E pole of PNP type triode Q2 is connected with the input of resistance R2 accesses charge power supply VCC afterwards, the B pole of PNP type triode Q2 is connected with the input of resistance R1, resistance R4 is connected between the C pole of LED 1 and PNP type triode Q2, the output of LED 1 is connected on the positive pole of rechargeable battery C1, the output of resistance R2 is connected with the output of resistance R1 and forms tie point P, wherein, adjustable voltage stabilizing circuit comprises NPN type triode Q1, resistance R3, variable resistor R5, voltage stabilizing didoe D1, wherein, the C pole of NPN type triode Q1, the input of resistance R3 is connected to tie point P all simultaneously, the output of resistance R3 is connected to voltage stabilizing didoe D1, the output of resistance R3 is connected to the B pole of NPN type triode Q1 simultaneously, the E pole of NPN type triode Q1 is connected with 3 ends of variable resistor R5, 2 ends of variable resistor R5 connect and are connected with the B pole of NPN type triode Q1, the 1 end ground connection of variable resistor R5, voltage stabilizing didoe D1 ground connection, adjustable constant-flow circuit comprises PNP type triode Q3, resistance R7, variable resistor R6, 3 ends of variable resistor R6 are all connected with the B pole of PNP type triode Q3 with 2 ends, 1 end of variable resistor R6 connects the resistance R7 of ground connection, the E pole of PNP type triode Q3 is connected with the E pole of NPN type triode Q1, the C pole of PNP type triode Q3 is connected with the positive pole of rechargeable battery C1.
2. the lithium battery charging circuit of fast and stable charging according to claim 1, is characterized in that: described charge power supply VCC adopts the DC power supply of positive 12V.
3. the lithium battery charging circuit of fast and stable according to claim 1 charging, is characterized in that: the resistance of resistance R2 is the little resistance resistors of 3.4 ohm or 5 ohm or 4 ohm.
4. the lithium battery charging circuit of fast and stable charging according to claim 1, is characterized in that: rechargeable battery C1 is lithium battery.
5. the lithium battery charging circuit of fast and stable charging according to claim 1, is characterized in that: the adjustable Standard resistance range of variable resistor R5 is 0 to 20K ohm.
6. the lithium battery charging circuit of fast and stable charging according to claim 1, is characterized in that: the adjustable Standard resistance range of variable resistor R5 is 0 to 2K ohm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410534708.5A CN104269902A (en) | 2014-10-13 | 2014-10-13 | Lithium battery charging circuit capable of fast and stably conducting charging |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410534708.5A CN104269902A (en) | 2014-10-13 | 2014-10-13 | Lithium battery charging circuit capable of fast and stably conducting charging |
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| CN104269902A true CN104269902A (en) | 2015-01-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410534708.5A Pending CN104269902A (en) | 2014-10-13 | 2014-10-13 | Lithium battery charging circuit capable of fast and stably conducting charging |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106655341A (en) * | 2016-11-15 | 2017-05-10 | 深圳天珑无线科技有限公司 | Charging circuit and charging system |
| CN111009943A (en) * | 2019-12-10 | 2020-04-14 | 惠州Tcl移动通信有限公司 | Battery charging method and device, storage medium and terminal |
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| CN103683347A (en) * | 2012-09-12 | 2014-03-26 | 成都天宇创新科技有限公司 | Simple charge controller of low-voltage vanadium battery |
| CN204167943U (en) * | 2014-10-13 | 2015-02-18 | 成都锐奕信息技术有限公司 | Time-dependent current charging system first quick and back slow |
| CN104578216A (en) * | 2013-10-25 | 2015-04-29 | 成都新方洲信息技术有限公司 | Simple type battery charging circuit for RFID handheld reader |
-
2014
- 2014-10-13 CN CN201410534708.5A patent/CN104269902A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103683347A (en) * | 2012-09-12 | 2014-03-26 | 成都天宇创新科技有限公司 | Simple charge controller of low-voltage vanadium battery |
| CN102957195A (en) * | 2012-11-30 | 2013-03-06 | 费新华 | Battery charge controlling circuit |
| CN104578216A (en) * | 2013-10-25 | 2015-04-29 | 成都新方洲信息技术有限公司 | Simple type battery charging circuit for RFID handheld reader |
| CN204167943U (en) * | 2014-10-13 | 2015-02-18 | 成都锐奕信息技术有限公司 | Time-dependent current charging system first quick and back slow |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106655341A (en) * | 2016-11-15 | 2017-05-10 | 深圳天珑无线科技有限公司 | Charging circuit and charging system |
| CN111009943A (en) * | 2019-12-10 | 2020-04-14 | 惠州Tcl移动通信有限公司 | Battery charging method and device, storage medium and terminal |
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Application publication date: 20150107 |