CN201243192Y - Solar battery power supply drive protection circuit for low power DC load - Google Patents
Solar battery power supply drive protection circuit for low power DC load Download PDFInfo
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- CN201243192Y CN201243192Y CNU2008200497813U CN200820049781U CN201243192Y CN 201243192 Y CN201243192 Y CN 201243192Y CN U2008200497813 U CNU2008200497813 U CN U2008200497813U CN 200820049781 U CN200820049781 U CN 200820049781U CN 201243192 Y CN201243192 Y CN 201243192Y
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
Abstract
The utility model relates to a solar battery powered driving protective circuit for a lower-power direct current load; the utility model solves the technical problems how to overcome the disadvantages that the existing solar battery driving circuit can not provide low-voltage protection and overcurrent protection, and provides a solar battery powered driving protective circuit for a lower-power direct current load. The driving protective circuit comprises an electricity-storage device, a constant voltage charging circuit and a driving protecting circuit; a driving protecting device comprises a voltage detecting and controlling circuit, a current detecting and controlling circuit and a switching element; the voltage detecting and controlling circuit is arranged between the anode and the cathode of the electricity-storage device, the current detecting and controlling circuit and the switching element are respectively connected on a discharging loop of the electricity-storage device in series; wherein, the output ends of controlling signals of the voltage detecting and controlling circuit and the current detecting and controlling circuit are connected with the input end of the controlling signals of the switching element. The driving protective circuit can provides the low-voltage protection and the overcurrent protection for the load, and is particularly suitable for split solar water heaters.
Description
Technical field
The utility model relates to a kind of Drive Protecting Circuit that is used for the small-power DC load of solar cell for supplying power.
Background technology
On August 7th, 2002, disclosed, publication number was: the Chinese utility model patent of CN2504561 discloses a kind of solar powered automatic circulating hot water device, it is that a solar cell 1 supply electric energy is installed on out of doors the heat collector, and the electric energy of solar cell 1 is to water pump 2 power supplies and to storage battery 3 chargings.Its circuit theory as shown in Figure 1, solar cell 1 is formed the charge/discharge loops with water pump 2, storage battery 3, during charging, solar cell 1 will could charge to storage battery 3 through water pump 2, during discharge, storage battery 2 will could be to water pump 2 power supply through solar cell 1, very science not.
As shown in Figure 2, when most of solar cell drive circuits used, solar cell all was to charge in batteries by charging circuit; And directly drive circulating pump work by storage battery.
The shortcoming of sort circuit has: 1, the solar cell utilization ratio is low, this be because, at first, the electricity that solar energy sends will be through the conversion of overcharge circuit, the conversion efficiency of charging circuit is lower than 100%; Secondly, charging circuit is to charge in batteries, and storage battery discharges to circulating pump again, the efficiency for charge-discharge here is well below 100%, and conversion efficiency is lower than 100% part and is wasted, and makes the electric energy of the same power of output, need equipped solar cell power to strengthen, caused the increase of cost.2, the lifetime of circulating pump, at first, in the circulation of solar water heater, because water temperature is higher, be easy to produce precipitation in circulating pump, owing to circulating pump is not taked any safeguard measure, storage battery is directly powered to circulating pump, circulating pump runs without interruption every day, causes the lifetime of circulating pump; And resistance takes place when puckery in that circulating pump takes place, storage battery can provide enough big electric current with burn-down of electric motor in the circulating pump, causes the circulating pump damage.3, not environmental protection of power supply, the life of storage battery is short, as can be seen from Figure 2: storage battery every day is discharging and recharging at little electric current all, so just cause storage battery not had enough to eat for a long time, tell unonly, the internal storage battery lead sulfate is at the pole plate precipitated crystal, and process is irreversible, cause progressively loss of activity and capacity diminishes of pole plate, quickened the speed of scrapping of storage battery, caused second environmental pollution
The utility model content
The technical problems to be solved in the utility model is how to overcome the defective that existing solar cell drive circuit can not provide under-voltage protection, overcurrent protection, and a kind of Drive Protecting Circuit that is used for the small-power DC load of solar cell for supplying power is provided.
For solving the problems of the technologies described above; the Drive Protecting Circuit that is used for the small-power DC load of this solar cell for supplying power comprises electric storage device and constant voltage charging circuit; constant voltage charging circuit just; negative output terminal connect respectively electric storage device just/negative pole on; it is characterized in that: it also comprises Drive Protecting Circuit; this driving protector comprises voltage detecting and controling circuit; current detection control circuit and switch element; voltage detecting and controling circuit just is being arranged on electric storage device; between the negative pole; current detection control circuit and switch element are serially connected in respectively on the discharge loop of electric storage device, wherein voltage detecting and controling circuit; the control signal output ends of current detection control circuit connects the signal input end of switch element.
So design, voltage detecting and controling circuit detect the supply power voltage of electric storage device when not enough or current detection control circuit detect the discharging current of electric storage device when excessive, cut off the power supply supply of load by switch element, realize protection to load.
As optimization, described switch element is power switch pipe Q2, described voltage detecting and controling circuit comprises operational amplifier U1A, the G pin of the output termination power switch pipe Q2 of this operational amplifier U1A, its reverse input end connects reference voltage, its in the same way input connect the positive and negative electrode of electric storage device respectively by divider resistance R3, R4.
As optimization, described current detection control circuit comprises sampling resistor R6 and operational amplifier U1B, wherein sampling resistor R6 is serially connected in the discharge loop of electric storage device, the G pin of the output termination power switch pipe of operational amplifier U1B, its reverse input end meets sampling resistor R6, and it imports the termination reference voltage in the same way.
As optimization, described operational amplifier U1A, operational amplifier U1B constitute the double loop operational amplifier.
As optimization, be provided with the voltage stabilizing circuit that resistance R 5 and zener diode D2 form between the positive and negative electrode of described electric storage device, described reference voltage is provided by this voltage stabilizing circuit, and described electric storage device is a super capacitor.
The Drive Protecting Circuit that is used for the small-power DC load of the utility model solar cell for supplying power can provide effective under-voltage protection and overcurrent protection for load; it is applied on the solar energy circulation; water pump life-span, operating efficiency have obtained large increase, are specially adapted to the separated type solar water heater.
Description of drawings
Be described further below in conjunction with the Drive Protecting Circuit that is used for the small-power DC load of accompanying drawing this solar cell for supplying power:
Fig. 1 is that publication number is: the circuit theory diagrams of the Chinese utility model patent of CN2504561;
Fig. 2 is the schematic diagram of most of solar cell drive circuits;
Fig. 3 is the block diagram of the Drive Protecting Circuit that is used for the small-power DC load of this solar cell for supplying power;
Fig. 4 is the Drive Protecting Circuit constant voltage charging circuit figure that is used for the small-power DC load of this solar cell for supplying power;
Fig. 5 is the circuit diagram of the Drive Protecting Circuit voltage detecting and controling circuit that is used for the small-power DC load of this solar cell for supplying power;
Fig. 6 is the circuit diagram of the Drive Protecting Circuit current detection control circuit that is used for the small-power DC load of this solar cell for supplying power;
Fig. 7 is the circuit diagram of the Drive Protecting Circuit that is used for the small-power DC load of this solar cell for supplying power.
Among Fig. 1,2: 1 is that solar cell, 2 is that water pump, 3 is storage battery;
Among Fig. 2-7: SP is that negative pole input, M+ are that negative pole output, C1-C6 are electric capacity for anodal output, M-for anodal input, SN, wherein C2 is that super electrode capacitance, R1-R17 are resistance, wherein R1-R4 is that divider resistance, R7, R9 are that pull-up resistor, Q1, Q2 are power tube, and wherein Q2 is the switching tube of control output.D1-D4 is a diode, and wherein D2 is a voltage stabilizing didoe; U1A, U1B constitute double loop operational amplifier LM358.
Embodiment
Execution mode one: shown in Fig. 3-7; the Drive Protecting Circuit that is used for the small-power DC load of this solar cell for supplying power comprises super capacitor C2 and constant voltage charging circuit; constant voltage charging circuit just; negative output terminal connect respectively super capacitor C2 just/negative pole on; it is characterized in that: it also comprises Drive Protecting Circuit; this driving protector comprises voltage detecting and controling circuit; current detection control circuit and switch element; voltage detecting and controling circuit just is being arranged on super capacitor C2; between the negative pole; current detection control circuit and switch element are serially connected in respectively on the discharge loop of super capacitor C2, wherein voltage detecting and controling circuit; the control signal output ends of current detection control circuit connects the signal input end of switch element.
Described switch element is power switch pipe Q2, described voltage detecting and controling circuit comprises operational amplifier U1A, the G pin of the output termination power switch pipe Q2 of this operational amplifier U1A, its reverse input end connects reference voltage, its in the same way input connect the positive and negative electrode of super capacitor C2 respectively by divider resistance R3, R4.
Described current detection control circuit comprises sampling resistor R6 and operational amplifier U1B, wherein sampling resistor R6 is serially connected in the discharge loop of super capacitor C2, the G pin of the output termination power switch pipe Q2 of operational amplifier U1B, its reverse input end meets sampling resistor R6, and it imports the termination reference voltage in the same way.Described operational amplifier U1A, operational amplifier U1B constitute the double loop operational amplifier.
Be provided with the voltage stabilizing circuit that resistance R 5 and zener diode D2 form between the positive and negative electrode of described super capacitor C2, described reference voltage is provided by this voltage stabilizing circuit.
Fig. 5, Fig. 6 combine, and join at U+, U-point with Fig. 4, and promptly pie graph 7.
When the Drive Protecting Circuit that is used for the small-power DC load of the utility model solar cell for supplying power was applied in the solar energy circulation of separated type solar water heater, its course of work, protection process were as follows:
Process one: morning the sun go out to rise or situation that sunshine is more weak under, the energy shortage that solar cell provides is so that water pump 2 continuous operations, power switch pipe Q2 turn-offs, and the store energy that solar cell is provided is in super capacitor C2, and the voltage among the super capacitor C2 rises gradually, when reaching the operating voltage of water pump 2, power switch pipe Q2 is open-minded, water pump 2 work, and the voltage among the super capacitor C2 descends again gradually, power switch pipe Q2 turn-offs after arriving set point, repeats said process again.
Process two: sunshine, the energy that solar cell provides was enough to make circulating pump work when more intense, and at this moment power switch pipe Q2 perseverance is open-minded, but water pump 2 continuous operations
The protection process:
First kind of situation, overvoltage protection; If solar cell is with water pump 2 coupling when bad, might flow through the overcurrent of water pump 2 in relatively water pump 2 superpressures operation during foot at sunshine, power switch pipe Q2 turn-offs when this situation occurring, and protection water pump 2 also can be set up acoustic-optic alarm in case of necessity.
Second kind of situation, overcurrent protection: water pump 2 run into the resistance puckery in, starting current is very big; if do not protected, be easy to burn water pump 2 motors, current detection control circuit is sampled to operating current; with set point relatively, when surpassing set point power switch pipe Q2 is turn-offed protection water pump 2.
Claims (5)
1; a kind of Drive Protecting Circuit that is used for the small-power DC load of solar cell for supplying power; comprise electric storage device and constant voltage charging circuit; constant voltage charging circuit just; negative output terminal connect respectively electric storage device just/negative pole on; it is characterized in that: it also comprises Drive Protecting Circuit; this driving protector comprises voltage detecting and controling circuit; current detection control circuit and switch element; voltage detecting and controling circuit just is being arranged on electric storage device; between the negative pole; current detection control circuit and switch element are serially connected in respectively on the discharge loop of electric storage device, wherein voltage detecting and controling circuit; the control signal output ends of current detection control circuit connects the signal input end of switch element.
2, the Drive Protecting Circuit that is used for the small-power DC load of solar cell for supplying power according to claim 1; it is characterized in that: described switch element is power switch pipe (Q2); described voltage detecting and controling circuit comprises operational amplifier (U1A); the G pin of the output termination power switch pipe (Q2) of this operational amplifier (U1A); its reverse input end connects reference voltage, its in the same way input connect the positive and negative electrode of electric storage device respectively by divider resistance (R3, R4).
3, the Drive Protecting Circuit that is used for the small-power DC load of solar cell for supplying power according to claim 2; it is characterized in that: described current detection control circuit comprises sampling resistor (R6) and operational amplifier (U1B); wherein sampling resistor (R6) is serially connected in the discharge loop of electric storage device; the G pin of the output termination power switch pipe (Q2) of operational amplifier (U1B); its reverse input end connects sampling resistor (R6), and it imports the termination reference voltage in the same way.
4, the Drive Protecting Circuit that is used for the small-power DC load of solar cell for supplying power according to claim 3 is characterized in that: described operational amplifier (U1A, U1B) constitutes the double loop operational amplifier.
5, the Drive Protecting Circuit that is used for the small-power DC load of solar cell for supplying power according to claim 4; it is characterized in that: be provided with the voltage stabilizing circuit that resistance (R5) and zener diode (D2) are formed between the positive and negative electrode of described electric storage device; described reference voltage is provided by this voltage stabilizing circuit, and described electric storage device is super capacitor (C2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200497813U CN201243192Y (en) | 2008-06-26 | 2008-06-26 | Solar battery power supply drive protection circuit for low power DC load |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200497813U CN201243192Y (en) | 2008-06-26 | 2008-06-26 | Solar battery power supply drive protection circuit for low power DC load |
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| Publication Number | Publication Date |
|---|---|
| CN201243192Y true CN201243192Y (en) | 2009-05-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200497813U Expired - Fee Related CN201243192Y (en) | 2008-06-26 | 2008-06-26 | Solar battery power supply drive protection circuit for low power DC load |
Country Status (1)
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| CN (1) | CN201243192Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102394494A (en) * | 2011-09-28 | 2012-03-28 | 魏德米勒电联接国际贸易(上海)有限公司 | Current-voltage converting circuit provided with over-current protection circuit module |
| CN102097035B (en) * | 2009-12-11 | 2013-03-06 | 财团法人工业技术研究院 | Display module as well as solar cell, electronic book and outdoor billboard employing same |
| CN103138243A (en) * | 2011-11-29 | 2013-06-05 | 海洋王（东莞）照明科技有限公司 | Charging circuit and charging device used for portable lamps |
| CN104218537A (en) * | 2013-05-30 | 2014-12-17 | 海洋王（东莞）照明科技有限公司 | An anti-reversal and undervoltage protection circuit for a battery and a lamp |
-
2008
- 2008-06-26 CN CNU2008200497813U patent/CN201243192Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102097035B (en) * | 2009-12-11 | 2013-03-06 | 财团法人工业技术研究院 | Display module as well as solar cell, electronic book and outdoor billboard employing same |
| CN102394494A (en) * | 2011-09-28 | 2012-03-28 | 魏德米勒电联接国际贸易(上海)有限公司 | Current-voltage converting circuit provided with over-current protection circuit module |
| CN103138243A (en) * | 2011-11-29 | 2013-06-05 | 海洋王（东莞）照明科技有限公司 | Charging circuit and charging device used for portable lamps |
| CN103138243B (en) * | 2011-11-29 | 2017-04-05 | 海洋王（东莞）照明科技有限公司 | A kind of charging circuit and charging device for portable lamp |
| CN104218537A (en) * | 2013-05-30 | 2014-12-17 | 海洋王（东莞）照明科技有限公司 | An anti-reversal and undervoltage protection circuit for a battery and a lamp |
| CN104218537B (en) * | 2013-05-30 | 2017-06-16 | 海洋王（东莞）照明科技有限公司 | Battery prevents reversed and under-voltage protecting circuit and light fixture |
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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: 20090520 |