CN104485720A - Novel multi-charging-mode current-detection-type full-charging indicating circuit with overcharge protection function - Google Patents
Novel multi-charging-mode current-detection-type full-charging indicating circuit with overcharge protection function Download PDFInfo
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- CN104485720A CN104485720A CN201510001965.7A CN201510001965A CN104485720A CN 104485720 A CN104485720 A CN 104485720A CN 201510001965 A CN201510001965 A CN 201510001965A CN 104485720 A CN104485720 A CN 104485720A
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- 230000001681 protective effect Effects 0.000 claims description 9
- 230000000087 stabilizing effect Effects 0.000 claims description 9
- 238000001514 detection method Methods 0.000 claims description 5
- 230000003247 decreasing effect Effects 0.000 abstract 2
- 239000002253 acid Substances 0.000 abstract 1
- 230000005611 electricity Effects 0.000 description 3
- 230000007704 transition Effects 0.000 description 3
- 238000004891 communication Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
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- 230000004927 fusion Effects 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
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- H02J7/0003—
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/0036—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using connection detecting circuits
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/00302—Overcharge protection
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a novel multi-charging-mode current-detection-type full-charging indicating circuit with the overcharge protection function. The novel multi-charging-mode current-detection-type full-charging indicating circuit is suitable for all universal 4-V lead-acid battery charging circuits on the market. The novel multi-charging-mode current-detection-type full-charging indicating circuit integrally comprises a mobile phone charger, an external transformer and an internal switch power source and has the overcharge-protection-provided charging indicating function in the three charging input modes. When the voltage of a battery is lower than set voltage, namely the battery is in the non-full charge state, the battery is connected into the circuit in one charging mode or two charging modes or three charging modes at will, and the battery is in the normal charging state. Along with increasing of the electric quantity of the battery, the voltage of the battery is increased, the charging current is gradually decreased, light of a red-green double-color indicator lamp is gradually switched from yellow light to green light, and when the charging current is decreased to be a set value, the indicator lamp completely gets into the green color.
Description
[technical field]
The invention belongs to the field of battery charging, particularly relate to a kind of novel charging in many ways band over-charge protective current detection type and be full of indicating circuit.
[background technology]
Along with the development of society, mobile phone has become the requisite means of communication of people, but every platform mobile phone is generally furnished with a charger for mobile phone, and charger for mobile phone is also extensively present in the middle of our daily life in other words.In order to make full use of our charger for mobile phone, the emergency luminaire of some built-in rechargeable battery also increases and adds this charging method of charger for mobile phone.Charger for mobile phone is generally 5V constant voltage and exports, and how this specific charging modes and other charging modes to be fused together, and to make circuit brief and concise, this just great to design proposition one challenge.
[summary of the invention]
In order to realize above technical purpose, the present invention is achieved by the following technical solutions:
The invention discloses a kind of novel charging in many ways band over-charge protective current detection type and be full of indicating circuit, comprise NPN pipe Q1, PNP pipe Q2, PNP pipe Q3, described NPN pipe Q1 base stage connects voltage stabilizing didoe U1 and ground connection, composition overcharge protection circuit, the reference pole (R) of voltage stabilizing didoe (U1) is connected between resistance (R6) and resistance (R11), base stage contact resistance (R10) simultaneously, the green LED of resistance (R8) and red and green color indicator light ground connection, after collector series resistance (R5), be connected with external charge input with current limliting load resistance, emitter contact resistance (R6) and resistance (R7) ground connection, emitter connects diode (D1) simultaneously, resistance (R7) and rechargeable battery (BT1), described PNP pipe Q2 base stage contact resistance (R13), be attempted by between resistance (R7) and rechargeable battery (BT1), the red LED of collector electrode contact resistance (R9) and red and green color indicator light ground connection, collector electrode connects contact resistance (R12) ground connection simultaneously, and emitter connects the emitter of diode (D4), diode (D1) and Q1, described PNP pipe Q3 base stage contact resistance (R14), be attempted by diode (D4), between resistance (R7) and rechargeable battery (BT1), collector electrode connects diode (D5), the red LED of resistance (R9) and red and green color indicator light ground connection, diode (D5) is connected between the collector electrode of Q2 and resistance (R12) simultaneously, and emitter is connected on diode (D2).
Further, extraneous charging input end comprises external transformer, charger for mobile phone and built-in switched power three kinds of modes.External charge input can access arbitrarily one, two or three charging modes.External transformer is connected with the collector electrode of resistance (R5), Q1 by diode (D3), current limliting load resistance, passes through the green LED of diode (D3), current limliting load resistance, resistance (R8) and red and green color indicator light and ground connection simultaneously; Charger for mobile phone connects diode (D6), the green LED of resistance (R8) and red and green color indicator light ground connection, charger for mobile phone is connected with rechargeable battery (BT1) by diode (D6), resistance (R5), Q1, diode (D1), diode (D2), resistance (R7), meanwhile, charger for mobile phone is connected with the emitter of Q3; The green LED of built-in switched power contact resistance (R8) and red and green color indicator light ground connection, built-in switched power is connected with the collector electrode of Q1 by resistance (R5) simultaneously.
Further, diode (D1, D2) is Schottky diode, and diode (D3, D4, D5, D6) is isolating diode.
Further, current limliting load circuit comprises resistance (R1, R2, R3, R4), and wherein resistance (R1, R3) is in parallel, recomposition series circuit after resistance (R2, R4) is in parallel.
Further, red and green color indicator light comprises red LED and green LED, the negative electrode series connection also ground connection of two LED.
Circuit fusion of the present invention comprises: charger for mobile phone, external transformer and built-in switched power, and three kinds of charging input modes can with the charging indication function of over-charge protective.
When external charge input mode accesses external transformer by DC1 interface; outside input is through isolating diode D3, current limliting load resistance R1, R2, R3, R4, resistance R5, triode Q1; charge to battery BT1 after Schottky diode D1, current sense resistor R7, wherein Q1 and voltage stabilizing didoe U1 forms simple overcharge protection circuit.When cell voltage is higher than set point, U1 is fed back to reference to pole (R) by R6 and R11 voltage ratio, make U1 anode (A) and negative electrode (K) conducting, Q1 base stage is from high level to low transition, thus proceed to magnifying state by saturation condition, finally arrive cut-off state, and then protection battery avoids overcharging damage, when charging current is greater than set point, pressure drop on resistance R7 adds that the pressure drop of Schottky diode D1 is greater than 0.7V, triode Q2 is made to maintain conducting, two LED of red and green color indicator light are all bright, be shown as gold-tinted, along with cell voltage slowly raises, charged electrical fails to be convened for lack of a quorum and constantly reduces, when the electric current flowing through R7 is less than set point, pressure drop on resistance R7 adds that the pressure drop of Schottky diode D1 is less than 0.7V, triode Q2 enters and amplifies finally to cut-off state, reduced gradually by the electric current of red LED, red and green color indicator light is slowly changed to green glow completely by gold-tinted, when reaching full state, indicator light shows green completely, reach the prompt facility being full of electricity.
When external charge input mode is by access built-in switched power; outside input is charged to battery BT1 after resistance R5, triode Q1, Schottky diode D1, current sense resistor R7, and wherein Q1 and voltage stabilizing didoe U1 forms simple overcharge protection circuit.When cell voltage is higher than set point, U1 is fed back to reference to pole (R) by R6 and R11 voltage ratio, make U1 anode (A) and negative electrode (K) conducting, Q1 base stage is from high level to low transition, thus proceed to magnifying state by saturation condition, finally arrive cut-off state, and then protection battery avoids overcharging damage, when charging current is greater than set point, pressure drop on resistance R7 adds that the pressure drop of Schottky diode D1 is greater than 0.7V, triode Q2 is made to maintain conducting, two LED of red and green color indicator light are all bright, be shown as gold-tinted, along with cell voltage slowly raises, charged electrical fails to be convened for lack of a quorum and constantly reduces, when the electric current flowing through R7 is less than set point, pressure drop on resistance R7 adds that the pressure drop of Schottky diode D1 is less than 0.7V, triode Q2 enters and amplifies finally to cut-off state, reduced gradually by the electric current of red LED, red and green color indicator light is slowly changed to green glow completely by gold-tinted, when reaching full state, indicator light shows green completely, reach the prompt facility being full of electricity.
When external charge input mode accesses charger for mobile phone by USB, because this charger interface standard universal is constant voltage 5.1V, when thus 4V battery being charged, Schottky diode D2 and current-limiting resistance R7 only need be added.Outside input is charged to battery BT1 after isolating diode D6, resistance R5, triode Q1, Schottky diode D1, Schottky diode D2 and current sense resistor R7.Due to the dividing potential drop effect of Schottky diode D2, share the voltage segment that charger interface exceeds battery.Wherein Q1 and voltage stabilizing didoe U1 forms simple overcharge protection circuit.When cell voltage is higher than set point, U1 is fed back to reference to pole (R) by R6 and R11 voltage ratio, make U1 anode (A) and negative electrode (K) conducting, Q1 base stage is from high level to low transition, thus proceed to magnifying state by saturation condition, finally arrive cut-off state, and then protection battery avoids overcharging damage, when charging current is greater than set point, pressure drop on resistance R7 adds that the pressure drop of Schottky diode D1 is greater than 0.7V, triode Q2 is made to maintain conducting, two LED of red and green color indicator light are all bright, be shown as gold-tinted, along with cell voltage slowly raises, charged electrical fails to be convened for lack of a quorum and constantly reduces, when the electric current flowing through R7 is less than set point, pressure drop on resistance R7 adds that the pressure drop of Schottky diode D1 is less than 0.7V, triode Q2 enters and amplifies finally to cut-off state, reduced gradually by the electric current of red LED, red and green color indicator light is slowly changed to green glow completely by gold-tinted, when reaching full state, indicator light shows green completely, reach the prompt facility being full of electricity.
As access simultaneously any two kinds or simultaneously access three kinds of charging modes, due to Q1 and U1 composition over-charge protective device, battery is still in normal charging condition, can not affect the actual use of circuit.
[Figure of description]
Fig. 1 is circuit diagram of the present invention.
[embodiment]
Below in conjunction with embodiment, invention is described further:
As shown in Figure 1 be that a kind of novel charging in many ways band over-charge protective current detection type is full of indicating circuit, comprise D882 type NPN pipe Q1, SS8550 type PNP pipe Q2 and Q3, described NPN pipe Q1 base stage connects voltage stabilizing didoe U1 and ground connection, composition overcharge protection circuit, voltage stabilizing didoe U1 adopts TL431 type controllable accurate source of stable pressure, be connected between 60K resistance R6 and 53.6K resistance R11 with reference to pole R, base stage connects 330K resistance R10 simultaneously, the green LED of 1.5K resistance R8 and red and green color indicator light ground connection, after collector electrode series connection 2.7R/2W resistance R5, with by resistance R1, R3 is in parallel, resistance R2, after R4 parallel connection, the current limliting load resistance of recomposition series circuit is connected with external charge input, emitter contact resistance R6 and resistance R11 ground connection, emitter connects model 5819 Schottky diode D1 simultaneously, 1.8R/2W resistance R7 and 4V rechargeable battery BT1, described PNP pipe Q2 base stage connects 220K resistance R13, be attempted by between resistance R7 and rechargeable battery BT1, collector electrode connects the red LED of 1.5K resistance R9 and red and green color indicator light and ground connection, collector electrode connects 10K resistance R12 ground connection simultaneously, and emitter connects the emitter of model 4007 isolating diode D4, Schottky diode D1 and Q1, described PNP pipe Q3 base stage connects 220K resistance R14, be attempted by isolating diode D4, between resistance R7 and rechargeable battery BT1, collector electrode connects the red LED of model 4007 isolating diode D5, resistance R9 and red and green color indicator light and ground connection, isolating diode D5 is connected between the collector electrode of Q2 and resistance R12 simultaneously, and emitter is connected on Schottky diode D2.The negative electrode series connection also ground connection of two LED of red and green color indicator light.
External transformer is connected with the collector electrode of resistance R5, Q1 by model 4007 isolating diode D3, current limliting load resistance, simultaneously by the green LED of model 4007 isolating diode D3, current limliting load resistance, resistance R8 and red and green color indicator light and ground connection; Charger for mobile phone connects the green LED of model 4007 isolating diode D6, resistance R8 and red and green color indicator light and ground connection, charger for mobile phone is connected with rechargeable battery BT1 by isolating diode D6, resistance R5, Q1, Schottky diode D1, Schottky diode D2, resistance R7, meanwhile, charger for mobile phone is connected with the emitter of Q3; The green LED of built-in switched power contact resistance R8 and red and green color indicator light ground connection, built-in switched power is connected by the collector electrode of resistance R5 with Q1 simultaneously.
When cell voltage is lower than setting, i.e. battery not full power state, accesses arbitrarily one, two or three charging modes, and battery can be allowed all to be in normal charging condition.
After accessing separately external transformer, outside input is through D3, and resistance R1-R5, over-charge protective triode Q1, charges to battery after resistance R7.When voltage is higher than set point, R6 and R11 voltage ratio feedback makes U1 conducting, and Q1 base stage transfers low level to from high level, proceeds to magnifying state to cut-off state by saturation condition, and then protection battery avoids overcharging damage.When charging current is greater than set point, the pressure drop on resistance R7 adds that the pressure drop of Schottky diode D1 is greater than 0.7V, and make Q2 maintain conducting, bi-colour LED is gold-tinted.Along with cell voltage slowly raises, charged electrical fails to be convened for lack of a quorum and constantly reduces, when the electric current flowing through R7 is less than set point, pressure drop on resistance R7 adds that the pressure drop of Schottky diode D1 is less than 0.7V, Q2 enters and amplifies finally to cut-off state, indicator light is slowly changed to green glow completely by gold-tinted, reaches and is full of deixis.As access separately built-in switched power charge time, circuit operation is identical.During as accessed separately charger for mobile phone interface, Schottky diode D2 and current-limiting resistance R7 only need be added when 4V battery is charged, Q3 along with charging current minimizing from saturation condition enter into amplify last to cut-off state, indicator light is also slowly changed to green glow completely by gold-tinted, reaches and is full of deixis.
As access simultaneously any two kinds or simultaneously access three kinds of charging modes, due to Q1 and U1 composition over-charge protective device, battery is still in normal charging condition, can not affect the actual use of circuit.
The above embodiment only have expressed several execution mode of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection range of patent of the present invention should be as the criterion with claims.
Claims (9)
1. a novel charging in many ways band over-charge protective current detection type is full of indicating circuit, it is characterized in that: comprise NPN pipe Q1, PNP pipe Q2, PNP pipe Q3, described NPN pipe Q1 base stage connects voltage stabilizing didoe U1 and ground connection, composition overcharge protection circuit, base stage contact resistance (R10) simultaneously, the green LED of resistance (R8) and red and green color indicator light ground connection, after collector series resistance (R5), be connected with external charge input with current limliting load resistance, emitter contact resistance (R6) and resistance (R11) ground connection, emitter connects diode (D1) simultaneously, resistance (R7) and rechargeable battery (BT1), described PNP pipe Q2 base stage contact resistance (R13), be attempted by between resistance (R7) and rechargeable battery (BT1), the red LED of collector electrode contact resistance (R9) and red and green color indicator light ground connection, collector electrode connects contact resistance (R12) ground connection simultaneously, and emitter connects the emitter of diode (D4), diode (D1) and Q1, described PNP pipe Q3 base stage contact resistance (R14), be attempted by diode (D4), between resistance (R7) and rechargeable battery (BT1), collector electrode connects diode (D5), the red LED of resistance (R9) and red and green color indicator light ground connection, diode (D5) is connected between the collector electrode of Q2 and resistance (R12) simultaneously, and emitter is connected on diode (D2).
2. circuit according to claim 1, is characterized in that: external charge input comprises external transformer, charger for mobile phone and built-in switched power three kinds of modes.
3. circuit according to claim 1 and 2, it is characterized in that: external transformer is connected with the collector electrode of resistance (R5), Q1 by diode (D3), current limliting load resistance, pass through the green LED of diode (D3), current limliting load resistance, resistance (R8) and red and green color indicator light and ground connection simultaneously; Charger for mobile phone connects diode (D6), the green LED of resistance (R8) and red and green color indicator light ground connection, charger for mobile phone is connected with rechargeable battery (BT1) by diode (D6), resistance (R5), Q1, diode (D1), diode (D2), resistance (R7), meanwhile, charger for mobile phone is connected with the emitter of Q3; The green LED of built-in switched power contact resistance (R8) and red and green color indicator light ground connection, built-in switched power is connected with the collector electrode of Q1 by resistance (R5) simultaneously.
4. circuit according to claim 1 and 2, is characterized in that: diode (D1, D2) is Schottky diode.
5. circuit according to claim 1 and 2, is characterized in that: diode (D3, D4, D5, D6) is isolating diode.
6. circuit according to claim 1 and 2, is characterized in that: current limliting load circuit comprises resistance (R1, R2, R3, R4), and wherein resistance (R1, R3) is in parallel, recomposition series circuit after resistance (R2, R4) is in parallel.
7. circuit according to claim 1 and 2, is characterized in that: red and green color indicator light comprises red LED and green LED, the negative electrode series connection also ground connection of two LED.
8. circuit according to claim 1 and 2, is characterized in that: the reference pole (R) of voltage stabilizing didoe (U1) is connected between resistance (R6) and resistance (R7).
9. circuit according to claim 1 and 2, is characterized in that: external charge input can access arbitrarily one, two or three charging modes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510001965.7A CN104485720A (en) | 2015-01-05 | 2015-01-05 | Novel multi-charging-mode current-detection-type full-charging indicating circuit with overcharge protection function |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510001965.7A CN104485720A (en) | 2015-01-05 | 2015-01-05 | Novel multi-charging-mode current-detection-type full-charging indicating circuit with overcharge protection function |
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| CN104485720A true CN104485720A (en) | 2015-04-01 |
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| CN201510001965.7A Pending CN104485720A (en) | 2015-01-05 | 2015-01-05 | Novel multi-charging-mode current-detection-type full-charging indicating circuit with overcharge protection function |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107276169A (en) * | 2017-07-12 | 2017-10-20 | 金华市恒光电子科技有限公司 | A kind of charger charge protector and guard method |
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| CN103236735A (en) * | 2013-05-14 | 2013-08-07 | 国之光照明科技有限公司 | Emergency instruction power supply |
| CN203119510U (en) * | 2012-12-19 | 2013-08-07 | 刘海敏 | Wireless charger |
| CN103715737A (en) * | 2013-12-23 | 2014-04-09 | 杭州电子科技大学 | Lithium battery charging/ discharging management system |
| CN203674759U (en) * | 2013-08-07 | 2014-06-25 | 厦门创惟电子科技有限公司 | Double-color LED indicating circuit for lithium battery charger |
-
2015
- 2015-01-05 CN CN201510001965.7A patent/CN104485720A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2236688Y (en) * | 1995-12-08 | 1996-10-02 | 北京百普绿色科技有限公司 | Improved connector for charging pager directly and special charger |
| CN2606979Y (en) * | 2002-10-29 | 2004-03-17 | 联想(北京)有限公司 | Novel portable equipment intelligent charger |
| CN201038802Y (en) * | 2007-05-31 | 2008-03-19 | 北京交通大学 | Multifunctional charger |
| CN203119510U (en) * | 2012-12-19 | 2013-08-07 | 刘海敏 | Wireless charger |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107276169A (en) * | 2017-07-12 | 2017-10-20 | 金华市恒光电子科技有限公司 | A kind of charger charge protector and guard method |
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Application publication date: 20150401 |