CN103384074B - Battery charger controlling circuit - Google Patents
Battery charger controlling circuit Download PDFInfo
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- CN103384074B CN103384074B CN201310268040.XA CN201310268040A CN103384074B CN 103384074 B CN103384074 B CN 103384074B CN 201310268040 A CN201310268040 A CN 201310268040A CN 103384074 B CN103384074 B CN 103384074B
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Abstract
The invention relates to a battery charger controlling circuit, in particular to a storage battery charging controlling circuit. At present, a battery charger main circuit is generally composed of a switch power source, the switch power source has large interference to a single chip microcomputer, meanwhile, the phenomenon of dead halt can occur in the single chip microcomputer, the situation that charging parameters are out of control is caused, and accordingly a storage battery is damaged. The battery charger controlling circuit comprises a battery charger main circuit, a constant current/constant voltage circuit, a pulse and timing circuit, a second constant current/constant voltage control circuit, a charging state indicating circuit and an output and anti-reverse-connection circuit. The battery charger controlling circuit can achieve all the functions controlled by the single chip microcomputer, and due to the fact that anti-interference resistors and anti-interference capacitors are additionally arranged in the circuits, the circuits are not interfered by the switch power source and reliability is high.
Description
Technical field
The present invention relates to a kind of charging control circuit, be specifically related to a kind of storage battery charge control circuit.
Background technology
Lead acid accumulator because battery capacity is large, low price there is memory-less effect and be used widely; But the charging process of lead acid accumulator is very large to its aging effects.At present, adopt Single-chip Controlling charging device, charging process can be divided into trickle charge, quick charge, bulk charge, floating charge four-stage, to improve lead acid accumulator useful life.
Because charger main circuit is generally made up of Switching Power Supply, Switching Power Supply is very large to the interference of single-chip microcomputer, and deadlock phenomenon can occur single-chip microcomputer simultaneously, causes charge parameter out of control, to cause battery damage.
Summary of the invention
For problems of the prior art, the object of this invention is to provide a kind of charger control circuit, this control circuit can not by the interference of switching circuit, and reliability is high.
A kind of charger control circuit, is characterized in that comprising charger main circuit, constant current/constant voltage circuit, pulse and timing circuit, the second constant current/constant voltage control circuit, charged state indicating circuit and output and reverse-connection preventing circuit; Charger main circuit is made up of power input, current rectifying and wave filtering circuit, switching tube, high frequency transformer, rectifier filter circuit and DC output end; Constant-current circuit in constant current/constant voltage circuit, electric current by the output of charger main circuit 1 through current sampling resistor 2R10, through resistance 2R11, filter capacitor 2C3, be added to "+" end of operational amplifier 2IC1-2, controlled source of stable pressure 2IC3 control AB section voltage is 5 volts, this voltage is reference voltage, compared by operational amplifier 2IC1-2, output HIGH voltage, controlled the switching tube of charger main circuit 1 by photoelectrical coupler 2IC2, change main circuit output pulse width, make charging current constant; Constant voltage circuit in constant current/constant voltage circuit, voltage by the output of charger main circuit 1 via resistance 2R6 and the voltage sample circuit be connected in series with resistance 2R7, resistance 2R8 after thermo-compensator 2RT1, electric capacity 2C1 parallel connection, be added to "+" end of operational amplifier 2IC1-1, controlled source of stable pressure 2IC3 control AB section voltage is 5 volts, this voltage is reference voltage, compared by operational amplifier 2IC1-1, output HIGH voltage, the switching tube of charger main circuit 1 is controlled by photoelectrical coupler 2IC2, change main circuit output pulse width, make charging voltage constant; Constant-current circuit and constant voltage circuit are in parallel again after connecting with diode 2D1, diode 2D2 respectively, make constant-current circuit and constant voltage circuit without interruption mutually isolated; When constant voltage circuit is started working, the output of operational amplifier 2IC1-1 adds high level by resistance 3R12, diode 3D4 to comparator 3IC2-2 "+" end, the first via that comparator 3IC2-2 exports makes it reset to restart timing to 12 pin of binary counter 3IC1, the second tunnel is held to comparator 3IC3-1 "-", the output of comparator 3IC3-1 makes light-emitting diode 3LD2 lamp bright, represents that battery charging has been reached the 75%, the 3rd tunnel and cancelled the control of holding comparator 3IC2-3 "+" by diode 3D7; In second constant current/constant voltage control circuit, about charging current declines 5 peaces, operational amplifier 4IC1-2 exports high level, comparator 3IC3-2, comparator 3IC3-3, comparator 3IC3-4 "-" end is added to by resistance 3R24, the output of comparator 3IC3-2 makes light-emitting diode 3LD3 lamp bright, represent that battery charging reaches 98%, comparator 3IC3-3 output low level, add to operational amplifier 2IC1-1 "+" end by resistance 3R30, variable resistor 3VR2, realize the control to described constant voltage circuit; When comparator 3IC3-4 output low level, add to electric capacity 3C7 "+" end by resistance 3R31, resistance 3R32, realize the control to described constant-current circuit; The work timing of the constant voltage circuit that pulse and timing circuit are given in described constant current/constant voltage circuit is 5 hours, after reaching timing value, 2 pin of binary counter 3IC1 export high level, "+" end of comparator 3IC2-3 is added to by resistance 3R17, export high level, comparator 3IC3-2, comparator 3IC3-3, comparator 3IC3-4 "-" end is added to by resistance 3R19, realize the control to described constant voltage circuit, constant-current circuit, add to "-" end of comparator 3IC2-4, output low level, make light-emitting diode 3LD4 lamp bright, represent that battery charging is full of; The work timing of the constant-current circuit that pulse and timing circuit 3 are given in described constant current/constant voltage circuit 2 is 8 hours, if because summer temp is high, charging voltage is caused not reach constant voltage circuit initiation value in described constant current/constant voltage circuit 2, after reaching timing value, 3 pin of binary counter 3IC1 export high level at work 8 hours, added to "+" end of comparator 3IC2-2 by diode 3D5, make it export and become high level.
Owing to adopting technique scheme, the advantage that the present invention has and good effect are: can realize monolithic processor controlled all functions, add anti-interference resistance, electric capacity in circuit, and circuit is not disturbed by Switching Power Supply, and reliability is high.
Accompanying drawing explanation
Fig. 1 is electrical block diagram of the present invention.
In accompanying drawing, 1. charger main circuit, 2. constant current/constant voltage circuit, 3. pulse and timing circuit, 4. the second constant current/constant voltage control circuit, 5. charged state indicating circuit, 6. to export and reverse-connection preventing circuit.
Embodiment
With reference to accompanying drawing 1, a kind of charger control circuit, comprises charger main circuit 1, constant current/constant voltage circuit 2, pulse and timing circuit 3, second constant current/constant voltage control circuit 4, charged state indicating circuit 5, exports and reverse-connection preventing circuit 6.When the present invention starts working, electric current by output through current sampling resistor 2R10, through resistance 2R11, electric capacity 2C3 filtering, be added to "+" end of operational amplifier 2IC1-2, the AB section voltage that now controlled source of stable pressure 2IC3 controls is reference voltage 5 volts, is compared by operational amplifier 2IC1-2, output HIGH voltage, controlled the switching tube of charger main circuit 1 by photoelectrical coupler 2IC2, change main circuit output pulse width, make charging current constant.
When cell voltage rises to even charging voltage threshold values, voltage by output via the voltage sample circuit be connected in series with resistance 2R7, resistance 2R8 after resistance 2R6, thermo-compensator 2RT1, electric capacity 2C1 parallel connection, be added to "+" end of operational amplifier 2IC1-1, by comparing with reference voltage, operational amplifier 2IC1-1 output HIGH voltage, controls the switching tube of charger main circuit by photoelectrical coupler 2IC2, change main circuit output pulse width, make charging voltage constant; Add high level by electric cloudy 3R12, diode 3D4 to comparator 3IC2-2 "+" end simultaneously, the first via that comparator 3IC2-2 exports makes it reset to restart timing, the second tunnel to 3IC3-1 "-" end to 12 pin of binary counter 3IC1, and 3LD2 (75%) is bright, the control of holding 3IC2-3 "+" is cancelled on the 3rd tunnel by 3D7.
If because summer temp is high, and when causing charging voltage not reach described constant voltage circuit initiation value, 3 pin of binary counter 3IC1 export high level at work 8 hours, "+" end of comparator 3IC2-2 is added to by diode 3D5, make it export and become high level, the first via that comparator 3IC2-2 exports makes it reset to 12 pin of binary counter 3IC1 to restart timing, second tunnel is held to comparator 3IC3-1 "-", light-emitting diode 3LD2 lamp is bright, represent that battery charging reaches 75%, the control of holding comparator 3IC2-3 "+" is cancelled by diode 3D7 in 3rd tunnel.
About charging current declines 5 peaces, operational amplifier 4IC1-2 exports high level, comparator 3IC3-2, comparator 3IC3-3, comparator 3IC3-4 "-" end is added to by resistance 3R24, light-emitting diode 3LD3 lamp is bright, represent that battery charging reaches 98%, comparator 3IC3-3 output low level, and add to operational amplifier 2IC1-1 "+" end by resistance 3R30, variable resistor 3VR2, realize the control to described constant voltage circuit; Now comparator 3IC3-4 output low level, adds to electrochemical capacitor 3C7 "+" end by resistance 3R31, resistance 3R32, also realizes the control to described constant-current circuit.
When described constant voltage circuit work 5 hours, 2 pin of binary counter 3IC1 export high level, "+" end of comparator 3IC2-3 is added to by resistance 3R17, export high level, add to comparator 3IC3-2, comparator 3IC3-3, comparator 3IC3-4 "-" end by resistance 3R19, realize the control to described constant voltage circuit, constant-current circuit; Add to "-" end of comparator 3IC2-4, output low level, makes light-emitting diode 3LD4 lamp bright simultaneously, represents that battery charging is full of.Battery enters the floating charge stage, and this indicates that charging process terminates.
Claims (4)
1. a charger control circuit, is characterized in that comprising charger main circuit (1), constant current/constant voltage circuit (2), pulse and timing circuit (3), the second constant current/constant voltage control circuit (4), charged state indicating circuit (5) and exporting and reverse-connection preventing circuit (6); Charger main circuit (1) is made up of power input, current rectifying and wave filtering circuit, switching tube, high frequency transformer, rectifier filter circuit and DC output end; Constant-current circuit in constant current/constant voltage circuit (2), electric current by the output of charger main circuit 1 through current sampling resistor 2R10, through resistance 2R11, filter capacitor 2C3, be added to "+" end of operational amplifier 2IC1-2, controlled source of stable pressure 2IC3 control AB section voltage is 5 volts, this voltage is reference voltage, compared by operational amplifier 2IC1-2, output HIGH voltage, the switching tube of charger main circuit 1 is controlled by photoelectrical coupler 2IC2, change main circuit output pulse width, make charging current constant; Constant voltage circuit in constant current/constant voltage circuit (2), voltage by the output of charger main circuit 1 via resistance 2R6 and the voltage sample circuit be connected in series with resistance 2R7, resistance 2R8 after thermo-compensator 2RT1, electric capacity 2C1 parallel connection, be added to "+" end of operational amplifier 2IC1-1, controlled source of stable pressure 2IC3 control AB section voltage is 5 volts, this voltage is reference voltage, compared by operational amplifier 2IC1-1, output HIGH voltage, the switching tube of charger main circuit 1 is controlled by photoelectrical coupler 2IC2, change main circuit output pulse width, make charging voltage constant; Constant-current circuit and constant voltage circuit are in parallel again after connecting with diode 2D1, diode 2D2 respectively, make constant-current circuit and constant voltage circuit without interruption mutually isolated; When constant voltage circuit is started working, the output of operational amplifier 2IC1-1 adds high level by resistance 3R12, diode 3D4 to comparator 3IC2-2 "+" end, the first via that comparator 3IC2-2 exports makes it reset to restart timing to 12 pin of binary counter 3IC1, the second tunnel is held to comparator 3IC3-1 "-", the output of comparator 3IC3-1 makes light-emitting diode 3LD2 lamp bright, represents that battery charging has been reached the 75%, the 3rd tunnel and cancelled the control of holding comparator 3IC2-3 "+" by diode 3D7.
2. a kind of charger control circuit according to claim 1, it is characterized in that: in the second described constant current/constant voltage control circuit (4), about charging current declines 5 peaces, operational amplifier 4IC1-2 exports high level, comparator 3IC3-2 is added to by resistance 3R24, comparator 3IC3-3, comparator 3IC3-4 "-" holds, the output of comparator 3IC3-2 makes light-emitting diode 3LD3 lamp bright, represent that battery charging reaches 98%, comparator 3IC3-3 output low level, by resistance 3R30, variable resistor 3VR2 adds to operational amplifier 2IC1-1 "+" end, realize the control to described constant voltage circuit, when comparator 3IC3-4 output low level, add to electric capacity 3C7 "+" end by resistance 3R31, resistance 3R32, realize the control to described constant-current circuit.
3. a kind of charger control circuit according to claim 1, it is characterized in that: described pulse and timing circuit (3) are 5 hours to the work timing of the constant voltage circuit in described constant current/constant voltage circuit (2), after reaching timing value, 2 pin of binary counter 3IC1 export high level, "+" end of comparator 3IC2-3 is added to by resistance 3R17, export high level, comparator 3IC3-2 is added to by resistance 3R19, comparator 3IC3-3, comparator 3IC3-4 "-" holds, realize described constant voltage circuit, the control of constant-current circuit, add to "-" end of comparator 3IC2-4, output low level, make light-emitting diode 3LD4 lamp bright, represent that battery charging is full of.
4. a kind of charger control circuit according to claim 1, it is characterized in that: described pulse and timing circuit 3 are 8 hours to the work timing of the constant-current circuit in described constant current/constant voltage circuit 2, if because summer temp is high, charging voltage is caused not reach constant voltage circuit initiation value in described constant current/constant voltage circuit 2, after reaching timing value, 3 pin of binary counter 3IC1 export high level at work 8 hours, added to "+" end of comparator 3IC2-2 by diode 3D5, make it export and become high level.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310268040.XA CN103384074B (en) | 2013-06-28 | 2013-06-28 | Battery charger controlling circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310268040.XA CN103384074B (en) | 2013-06-28 | 2013-06-28 | Battery charger controlling circuit |
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| Publication Number | Publication Date |
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| CN103384074A CN103384074A (en) | 2013-11-06 |
| CN103384074B true CN103384074B (en) | 2015-06-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310268040.XA Expired - Fee Related CN103384074B (en) | 2013-06-28 | 2013-06-28 | Battery charger controlling circuit |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200969527Y (en) * | 2006-09-30 | 2007-10-31 | Bcd半导体制造有限公司 | Charger circuit and its charger |
| CN201549905U (en) * | 2009-08-26 | 2010-08-11 | 深圳市瑞必达电源有限公司 | Charger with dual-timing safety protection circuit |
| CN101814756A (en) * | 2010-04-12 | 2010-08-25 | 深圳市纳芯威科技有限公司 | Constant-current and constant-voltage control circuit, charging circuit and charger |
| CN201674261U (en) * | 2010-04-06 | 2010-12-15 | 江苏江禾高科电子有限公司 | Intelligent battery charger |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5057902B2 (en) * | 2007-09-06 | 2012-10-24 | 株式会社リコー | Charge control circuit |
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2013
- 2013-06-28 CN CN201310268040.XA patent/CN103384074B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200969527Y (en) * | 2006-09-30 | 2007-10-31 | Bcd半导体制造有限公司 | Charger circuit and its charger |
| CN201549905U (en) * | 2009-08-26 | 2010-08-11 | 深圳市瑞必达电源有限公司 | Charger with dual-timing safety protection circuit |
| CN201674261U (en) * | 2010-04-06 | 2010-12-15 | 江苏江禾高科电子有限公司 | Intelligent battery charger |
| CN101814756A (en) * | 2010-04-12 | 2010-08-25 | 深圳市纳芯威科技有限公司 | Constant-current and constant-voltage control circuit, charging circuit and charger |
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| CN103384074A (en) | 2013-11-06 |
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Granted publication date: 20150624 Termination date: 20190628 |