CN202586463U - Nickel-cadmium charger control circuit - Google Patents
Nickel-cadmium charger control circuit Download PDFInfo
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- CN202586463U CN202586463U CN2012201606640U CN201220160664U CN202586463U CN 202586463 U CN202586463 U CN 202586463U CN 2012201606640 U CN2012201606640 U CN 2012201606640U CN 201220160664 U CN201220160664 U CN 201220160664U CN 202586463 U CN202586463 U CN 202586463U
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Abstract
The utility model discloses a nickel-cadmium charger control circuit which comprises an input circuit, a conversion circuit, an output circuit, a sampling circuit, a comparison amplifier, a voltage/frequency converter, a driving circuit, a reference circuit, and a single chip microcomputer circuit. By employing a nickel-cadmium battery charger of the circuit of the utility model, charging can be started with 0V, and a battery pack from 7.2V to 18V can be charged. Alternating current voltage from 90V to 264V is inputted in the charger, and pulse constant current 1.5A is outputted from the charger. In addition, switching power supply technology is employed, compared with a low frequency (constant voltage) charger, the charger of the utility model has the advantages of power saving, small size, light weight, high efficiency, no over charging, integrated functions and the like. Intelligent fast charging is realized, a charging process of a battery can be accurately and automatically detected, if the battery is fully charged, the charger will automatically stop charging, and no over charging is ensured. The nickel-cadmium charger control circuit has the protection functions of overcurrent, overvoltage, short circuit, time protection and the like.
Description
Technical field:
The utility model relates to a kind of control circuit, especially a kind of NI-G charger control circuit.
Background technology:
The shortcoming of the common charger on the existing market mainly is presented as: can't repair the overdischarge pond; No over-charge protective, the charging of no pulse formula, it is full to judge accurately whether battery charges; Cause phenomenons such as battery explosion and battery weak point in useful life, to battery life and safe in utilization very unfavorable.
The utility model content:
The purpose of the utility model is to overcome the deficiency that exists in the above-mentioned prior art, and a kind of NI-G charger control circuit is provided.This circuit is that a kind of power circuit cooperates with single chip circuit and can accomplish that 0V opens the circuit that fills to nickel-cadmium cell charging, and can accomplish the pulse mode charging, can be to the overdischarge pond or need not promptly have for a long time and repair and the life-saving effect.
The concrete technical scheme of the utility model is following:
The NI-G charger control circuit comprises input circuit, translation circuit, output circuit, sample circuit, comparison amplifier, electric voltage/frequency converter, drive circuit, reference circuit, single chip circuit; It is characterized in that said input circuit sends to translation circuit with the 220V electric main; Said translation circuit is modulated and is exported the power supply wave shape that has power through connecting output circuit; Said output circuit is rectified into pulsating direct current to output voltage through rectification and filtering, and is smoothed to low ripple direct voltage, is transferred to the cell cavity that is recharged that is connected with it again; Said sample circuit is sampled to the voltage and current of output circuit and is given comparison amplifier; Said side's amplifier is through connecting sample circuit and reference circuit, and the reference signal that the voltage and current signal of being sampled and reference circuit are provided compares, and sends to electric voltage/frequency converter to the difference voltage signal and convert frequency signal to; Said drive circuit will convert the base stage that control signal is come the driving switch pipe from the frequency signal that electric voltage/frequency converter sends to; Said single chip circuit detects output current and voltage through connecting comparison amplifier, judges charged state then, adjust the output current of reference circuit simultaneously, and correspondence is sent bright lamp cue to LED light.
In the such scheme, said input circuit comprises linear filtering circuit, surge current suppression circuit and rectification circuit.
In the such scheme, said translation circuit comprises switching circuit, output isolation (transformer) circuit.
In the such scheme, adopting model in the said single chip circuit is LM7805 voltage stabilizing chip.
In the such scheme, it is the LM358 dual operational amplifier that said comparison amplifier adopts model.
Adopt the Ni-Cd battery charger of the said circuit of the utility model, but 0V open and fill, can charge to the power brick of 7.2V～18V, this charger is input as alternating voltage 90V～264V, is output as pulsed constant current 1.5A.Adopt switch power technology in addition, same low frequency (constant voltage) charger is compared, and has power saving, volume is little, in light weight, efficient is high, do not overcharge, function congruence advantage.The intelligence quick charge, can be accurately the charging process of detection battery automatically, if battery is full of, charger can stop to charge automatically, guarantees not overcharge.Have defencive functions such as overcurrent, overvoltage, short circuit, guardtime.
Description of drawings:
Further specify the utility model below in conjunction with accompanying drawing and embodiment.
Fig. 1 is the utility model circuit block diagram.
Fig. 2 is the circuit theory diagrams of the utility model.
Embodiment:
For technological means, creation characteristic that the utility model is realized, reach purpose and be easy to understand understanding with effect, below in conjunction with concrete diagram, further set forth the utility model.
As shown in Figure 1, the described NI-G charger control circuit of the utility model comprises input circuit 101, translation circuit 102, output circuit 103, sample circuit 104, comparison amplifier 105, electric voltage/frequency converter 106, drive circuit 107, reference circuit 108, single chip circuit 109.
Wherein, input circuit 101 can adopt usually and comprise these existing structures of linear filtering circuit, surge current suppression circuit and rectification circuit.Input circuit 101 sends to translation circuit 102 with the 220V electric main.Translation circuit 102 adopts usually and comprises switching circuit, these existing structures of output isolation (transformer) circuit.Translation circuit 102 is modulated and is exported the power supply wave shape that has power through connecting output circuit 103.Output circuit 103 is rectified into pulsating direct current to output voltage through rectification and filtering, and is smoothed to low ripple direct voltage, be transferred to again be connected with it be recharged cell cavity 110.The voltage and current of 104 pairs of output circuits 103 of sample circuit is sampled and is given comparison amplifier 105.It is the LM358 dual operational amplifier that comparison amplifier 105 adopts model.More square amplifier 105 is through connecting sample circuit 104 and reference circuit 108; The reference signal that the voltage and current signal of being sampled and reference circuit 108 are provided compares, and sends to electric voltage/frequency converter 106 to the difference voltage signal and convert frequency signal to.Drive circuit 107 will convert the base stage that control signal is come the driving switch pipe to from the frequency signal that electric voltage/frequency converter 106 sends.Adopting model in the single chip circuit 109 is LM7805 voltage stabilizing chip.Single chip circuit 109 detects output current and voltage through connecting comparison amplifier 105, judges charged state then, adjust the output current of reference circuit 108 simultaneously, and correspondence is sent bright lamp cue to LED light 111.
Below, through a physical circuit instance the described NI-G charger control circuit of this patent is described.
As shown in Figure 2, the detailed structure of entire circuit is as shown in the figure, and the function of critical piece is among the figure:
(1) single-chip microcomputer U3 is a product operation control centre;
(2) voltage stabilizing chip U5 is that single-chip microcomputer U3 provides 5V stabilized voltage power supply to circuit;
(3) LM358 dual operational amplifier U6 is as comparator;
(4) U2 power supply PWM.
Entire circuit overall work principle is: power supply source is a civil power, finally controls output by U2 power supply PWM control Q2 conducting with the shutoff pulsewidth; LM358 dual operational amplifier U6 is the comparator effect, feeds back to power circuit, the state of control output services; NET3, NET4, VB-is for judging the battery status sampled signal, by sending signal after the single-chip microcomputer U3 judgement to power circuit control output services state; LM7805 voltage stabilizing chip U3 is for being that 5V provides burning voltage to circuit through power source transition.
The concrete course of work and the principle of circuit are following:
1. after powering on earlier, insert battery again, the anodal pin of battery does not have in the contact, and power supply does not charge, and red light goes out, green light Chang Liang; The negative pole pin of battery does not have in the contact, and power supply does not have influence; The temperature switch pin of battery does not have in the contact, and the expression battery is unusual, red light stroboscopic, frequency 3HZ.
Principle: when, anodal pin do not contact, the no-output electric current, single-chip microcomputer U3NET3 does not have signal, judges not have charging; When negative pole does not connect, output current is arranged, judging has battery charge; When the temperature switch of battery does not have in the contact, single-chip microcomputer U3NET3 does not have signal, and VB-has signal, judges that battery is unusual.
2. connect battery earlier, power on, the anodal pin of battery does not have in the contact, and power supply does not charge, and red light goes out, green light Chang Liang; The negative pole pin of battery does not have in the contact, and power supply does not have influence; The temperature switch pin of battery does not have in the contact, and the expression battery is unusual, red light stroboscopic, frequency 3HZ.
Principle: when, anodal pin do not contact, the no-output electric current, single-chip microcomputer U3NET3 does not have signal, judges not have charging; When negative pole does not connect, output current is arranged, judging has battery charge; When the temperature switch of battery does not have in the contact, single-chip microcomputer U3NET3 does not have signal, and VB-has signal, judges that battery is unusual.
3. in charging process, if the anodal pin of battery does not have in the contact, power supply does not charge, and red light goes out, green light Chang Liang; The negative pole pin of battery does not have in the contact, and power supply does not have influence; Full if temperature switch does not have contact to represent that upward battery has filled, red light is bright, and green light is bright.
Principle: when, anodal pin do not contact, the no-output electric current, single-chip microcomputer U3NET3 does not have signal, judges not have charging; When VB-does not connect, output current is arranged, judging has battery charge; When the temperature switch of battery does not have in the contact, in charging process, single-chip microcomputer U3NET3 does not have signal suddenly, and NET4 has signal, judges that battery fills full.And single-chip microcomputer U3NET2 issues a signal to LM358 and does comparison, feeds back to power circuit control output current.
4. if the both positive and negative polarity short circuit of charger output, charger also is in constant current state so, this moment green light ON, red light OFF, short circuit current 90MA (AVE).
Principle: when the both positive and negative polarity short circuit, power circuit gets into guard mode.
5. after charging one minute, if power brick voltage also is lower than the state of 4.8V ± 0.5V, the expression battery is unusual, red light stroboscopic, frequency 3HZ.
Principle: charge after one minute, also be in when single-chip microcomputer U3NET4 detects＜during 4.8V, issue a signal to LM358 by U3NET2 and feed back to power circuit control output current, control the demonstration of indicator light simultaneously;
6. in charging process, if the temperature switch pin breaks off, expression power brick temperature has reached the temperature that temperature switch breaks off, and thinks that power brick filled fullly this moment, and red light is bright, and green light is bright.
Principle: in charging process, single-chip microcomputer U3NET3 does not have signal suddenly, and VB-has signal, judges that battery fills full; And single-chip microcomputer U3NET2 issues a signal to LM358 and does comparison, feeds back to power circuit control output current, controls the demonstration of indicator light simultaneously.
7. in charging process, if the voltage of power brick is higher than 28V ± 0.5V, think that power brick filled fullly this moment, red light is bright, and green light is bright, and power brick gets into the trickle charge stage then
Principle: in charging process, single-chip microcomputer U3NET4 has signal 28V, and it is full to judge that battery fills, and single-chip microcomputer U3NET2 issues a signal to LM358 and do comparison, feeds back to power circuit control output current, controls the demonstration of indicator light simultaneously.
8. in charging process, if fill the stage soon time is up 70Min (TYP), think that power brick filled fullly this moment, red light is bright, and green light is bright, and power brick gets into the trickle charge stage then
Principle: in charging process, the single-chip microcomputer internal timing is that automatically to judge after 70 minutes that battery fills full, and single-chip microcomputer U3NET2 issues a signal to LM358 and do comparison, feeds back to power circuit control output current, controls the demonstration of indicator light simultaneously.
9. in charging process, if detected power brick-Δ V, think that power brick filled fullly this moment, red light is bright, green light is bright, power brick gets into the trickle charge stage then.
Principle: in charging process, single-chip microcomputer U3NET4 detected power brick-Δ V, it is full to judge that battery fills, and single-chip microcomputer U3NET2 issues a signal to LM358 and do comparison, feeds back to power circuit control output current, controls the demonstration of indicator light simultaneously.
10. in charging process, when finding that red light always during stroboscopic, has only the power brick of more finishing changing could recover normal.
Principle: this phenomenon meets above the 5.th, judges that being recharged the pond also damages, and needs to change battery.
More than show and described basic principle of the utility model and the advantage of principal character and the utility model.The technical staff of the industry should understand; The utility model is not restricted to the described embodiments; The principle of describing in the foregoing description and the specification that the utility model just is described; Under the prerequisite that does not break away from the utility model spirit and scope, the utility model also has various changes and modifications, and these variations and improvement all fall in the utility model scope that requires protection.The utility model requires protection range to be defined by appending claims and equivalent thereof.
Claims (5)
1. the NI-G charger control circuit comprises input circuit, translation circuit, output circuit, sample circuit, comparison amplifier, electric voltage/frequency converter, drive circuit, reference circuit, single chip circuit; It is characterized in that said input circuit sends to translation circuit with the 220V electric main; Said translation circuit is modulated and is exported the power supply wave shape that has power through connecting output circuit; Said output circuit is rectified into pulsating direct current to output voltage through rectification and filtering, and is smoothed to low ripple direct voltage, is transferred to the cell cavity that is recharged that is connected with it again; Said sample circuit is sampled to the voltage and current of output circuit and is given comparison amplifier; Said side's amplifier is through connecting sample circuit and reference circuit, and the reference signal that the voltage and current signal of being sampled and reference circuit are provided compares, and sends to electric voltage/frequency converter to the difference voltage signal and convert frequency signal to; Said drive circuit will convert the base stage that control signal is come the driving switch pipe from the frequency signal that electric voltage/frequency converter sends to; Said single chip circuit detects output current and voltage through connecting comparison amplifier, judges charged state then, adjust the output current of reference circuit simultaneously, and correspondence is sent bright lamp cue to LED light.
2. according to the NI-G charger control circuit of claim 1, it is characterized in that said input circuit comprises linear filtering circuit, surge current suppression circuit and rectification circuit.
3. according to the NI-G charger control circuit of claim 1, it is characterized in that said translation circuit comprises switching circuit, output isolation circuit.
4. according to the NI-G charger control circuit of claim 1, it is characterized in that adopting model in the said single chip circuit is LM7805 voltage stabilizing chip.
5. according to the NI-G charger control circuit of claim 1, it is characterized in that it is the LM358 dual operational amplifier that said comparison amplifier adopts model.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201606640U CN202586463U (en) | 2012-04-16 | 2012-04-16 | Nickel-cadmium charger control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201606640U CN202586463U (en) | 2012-04-16 | 2012-04-16 | Nickel-cadmium charger control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202586463U true CN202586463U (en) | 2012-12-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012201606640U Expired - Fee Related CN202586463U (en) | 2012-04-16 | 2012-04-16 | Nickel-cadmium charger control circuit |
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| Country | Link |
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| CN (1) | CN202586463U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103872890A (en) * | 2014-03-31 | 2014-06-18 | 广州视源电子科技股份有限公司 | Switch power circuit with short circuit protective function |
| CN104539024A (en) * | 2015-01-21 | 2015-04-22 | 航天长峰朝阳电源有限公司 | Charging control circuit adopting automatic shutdown technology |
| CN106451709A (en) * | 2016-08-31 | 2017-02-22 | 袁博 | General charger for electric automobile |
| CN113162178A (en) * | 2021-04-27 | 2021-07-23 | 深圳市阳邦兴业智能科技有限公司 | Detection protection and control system with charging function |
-
2012
- 2012-04-16 CN CN2012201606640U patent/CN202586463U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103872890A (en) * | 2014-03-31 | 2014-06-18 | 广州视源电子科技股份有限公司 | Switch power circuit with short circuit protective function |
| CN103872890B (en) * | 2014-03-31 | 2017-03-22 | 广州视源电子科技股份有限公司 | Switch power circuit with short circuit protective function |
| CN104539024A (en) * | 2015-01-21 | 2015-04-22 | 航天长峰朝阳电源有限公司 | Charging control circuit adopting automatic shutdown technology |
| CN106451709A (en) * | 2016-08-31 | 2017-02-22 | 袁博 | General charger for electric automobile |
| CN106451709B (en) * | 2016-08-31 | 2021-05-25 | 袁博 | General charger of electric automobile |
| CN113162178A (en) * | 2021-04-27 | 2021-07-23 | 深圳市阳邦兴业智能科技有限公司 | Detection protection and control system with charging function |
| CN113162178B (en) * | 2021-04-27 | 2024-05-24 | 深圳市阳邦兴业智能科技有限公司 | Detection protection and control system with charging function |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121205 Termination date: 20130416 |