CN201947020U - Solar charging conversion module with light intensity self-adjusting function - Google Patents
Solar charging conversion module with light intensity self-adjusting function Download PDFInfo
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- CN201947020U CN201947020U CN201120057492XU CN201120057492U CN201947020U CN 201947020 U CN201947020 U CN 201947020U CN 201120057492X U CN201120057492X U CN 201120057492XU CN 201120057492 U CN201120057492 U CN 201120057492U CN 201947020 U CN201947020 U CN 201947020U
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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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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Abstract
The utility model provides a solar charging conversion module with a light intensity self-adjusting function, and a system charging point adopts a voltage detection close-loop control. The module comprises a comparator 1, a comparator 2, a logic switch, a pump power supply, an oscillator, a charge switch and a battery; when the light is dim, namely, the input voltage is smaller than the threshold voltage, the comparator 1, the logic switch, the oscillator, the pump power supply, the comparator 2, the charge switch and the battery are sequentially connected to form a charging loop; when the light is strong, namely, the input voltage is larger than or equal to the threshold voltage, the comparator 1, the charge switch and the battery are sequentially connected to form the charging loop. Both a normal charge and a voltage-doubling charge of the storage battery are realized through adopting a dynamic voltage adjusting mode, so that the problem of solar battery energy loss when the light is dim is solved, and the battery is charged no matter the light is dim or strong.
Description
Technical field
The invention belongs to the solar charging device preparing technical field, particularly a kind of design of light intensity self-regulation solar recharging modular converter.
Background technology
Problem of environmental pollution has become global problem at present, global energy situation anxiety, climate warming, these all serious threat economic development and human lives.Countries in the world are all seeking new forms of energy and strategy such as recycling, to guarantee sustainable development and to obtain superiority.Under the background of polluting and being becoming tight energy day, solar energy is as a kind of novel green regenerative energy sources, have reserves greatly, utilize advantages such as economy, clean environment firendly.Therefore, the utilization of solar energy more and more is subject to people's attention.
At present, various photovoltaic plants generally adopt solar cell to collect solar energy, it is stored in the storage battery so that carry out voltage transformation supply user use when needed, this device package becomes solar module, match with energy storage device, measuring and controlling and DC-AC converter etc., constitute photovoltaic generating system.The mode of tradition solar recharging transmission is solar cell → storage battery, and needing could be to battery charge under specified intensity of illumination or the intense light irradiation.Yet because the solar cell output characteristic is non-linear, making its working point is not constantly to be near the maximum power point.Solar cell is accepted low light level when irradiation, and battery charge deficiency, charge cycle are elongated, discharge cycle shortens, and perhaps can't cause the efficiency of light energy utilization on the low side to charge in batteries, causes the waste of solar cell energy.
Summary of the invention
Solar cell energy losing issue when shining in order to solve the low light level, according to the non-linear characteristics of solar cell output characteristic curve, the present invention is by optimizing the control circuit of charging link, to realize the seizure of maximum power point.
The present invention increases charging conduction module between solar cell and storage battery, realize the control model that storage battery directly charges under multiplication of voltage pulse current charge, the high light under the low light level, effectively improve the operating efficiency of solar cell, thereby when selecting the quota solar cell, reach optimum specifications, reliability and applicability that the raising system installs are improved the whole system operation performance when reducing cost.
A kind of light intensity self-regulation solar recharging modular converter, system's charge point adopts the voltage detecting closed-loop control, and this module comprises: comparator 1, comparator 2, logic switch, pumping source, oscillator, charge switch and battery; When input voltage was less than threshold voltage when the low light level shone, comparator 1, logic switch, oscillator, pumping source, comparator 2, charge switch, battery connected and composed charge circuit successively; When input voltage was more than or equal to threshold voltage during intense light irradiation, comparator 1, charge switch and battery connected and composed charge circuit successively.
Described oscillator is the pulse signal of 500kHZ, by the 6th not gate (U
6) and the 5th resistance (R
5) compose in parallel parallel circuits, this parallel circuits again with the 7th not gate (U
7) be composed in series series circuit, this series circuit again with the second electric capacity (C
2) compose in parallel parallel circuits.
Described comparator 1 is the intensity monitor comparison circuit, by the first not gate (U
1), the second not gate (U
2) be composed in series series circuit, this series circuit and the second resistance (R
2) compose in parallel parallel circuits, this parallel circuits more successively with the first diode (U
G1), the first resistance (R
1) be composed in series series circuit.
Described comparator 2 is for multiplication of voltage charging comparison circuit, by the 3rd not gate (U
3), the 4th not gate (U
4) be composed in series series circuit, this series circuit and the 4th resistance (R
4) compose in parallel parallel circuits, this parallel circuits more successively with the second diode (U
G2), the 3rd resistance (R
3) be composed in series series circuit.
The light intensity self-regulation solar recharging modular converter of the present invention's development, system's charge point adopts the voltage detecting closed-loop control, is a kind of new type solar energy charging control model, has improved the operating efficiency of solar cell.The mode of the solar recharging transmission after improving is solar cell → memory cell → control unit → storage battery, and in capacitor, control unit is then finished the charging voltage conversion to memory cell with the power storage of solar cell output.The present invention is strong, the low light level according under automatic control mode, solved the best power point seizure problem of solar cell effectively.Empirical tests, module have the advantage performance of wide voltage power supply scope, and output voltage ripple was little under the low light level shone, and transmission efficiency is up to 98%, and static working current is less than 20 μ A.This design has realized the control model that storage battery directly charges under multiplication of voltage pulse current charge, the high light under the low light level, compact conformation is the solar charging electric control module of a highly effective.
Description of drawings
Fig. 1. light intensity self-regulation solar recharging modular converter functional structure chart.
Fig. 2. light intensity self-regulation solar recharging modular converter control circuit schematic diagram.
Embodiment
Fig. 1 is a light intensity self-regulation solar recharging modular converter functional structure chart, and this module comprises as shown in Figure 1: comparator 1, comparator 2, logic switch, pumping source, oscillator, charge switch and battery; When input voltage was less than threshold voltage when the low light level shone, comparator 1, logic switch, oscillator, pumping source, comparator 2, charge switch, battery connected and composed charge circuit successively; When input voltage was more than or equal to threshold voltage during intense light irradiation, comparator 1, charge switch and battery connected and composed charge circuit successively; U wherein
InBe the input voltage of module, U
OutBe the output voltage of module, U
G1Expression intense light irradiation comparative voltage is given, U
G2Expression charge switch operation voltage is given.
Fig. 2 is a light intensity self-regulation solar recharging modular converter control circuit schematic diagram, and system's charge point adopts the voltage detecting closed-loop control.Oscillator is the pulse signal of 500kHZ, by the 6th not gate U
6With the 5th resistance R
5Compose in parallel parallel circuits, this parallel circuits again with the 7th not gate U
7Be composed in series series circuit, this series circuit again with second capacitor C
2Compose in parallel parallel circuits; Comparator 1 is the intensity monitor comparison circuit, by the first not gate U
1, the second not gate U
2Be composed in series series circuit, this series circuit and second resistance R
2Compose in parallel parallel circuits, this parallel circuits more successively with the first diode U
G1, first resistance R
1Be composed in series series circuit; Comparator 2 is for multiplication of voltage charging comparison circuit, by the 3rd not gate U
3, the 4th not gate U
4Be composed in series series circuit, this series circuit and the 4th resistance R
4Compose in parallel parallel circuits, this parallel circuits more successively with the second diode U
G2, the 3rd resistance R
3Be composed in series series circuit; L is that pump rises power supply inductance, Q
1Be logic switch, Q
2For pump rises power supply switch tube, Q
3Be the charge switch pipe.
1. multiplication of voltage charging: electric energy prestored and is stored in capacitor C when the low light level shone
1, when the capacitance terminal voltage U
InBe lower than the given U of comparator 1
G1The time, comparator 1 output U
0Be low level, U
5Be output as high level, Q
1Close, open Q this moment
2It is the pulse signal of 500kHz that oscillator provides switching frequency, and Boost circuit working, output voltage begin to rise.(U when voltage reaches the battery charging voltage twice
Out〉=U
G2), the output U of comparator 2
1By the low level upset is high level, D
2Q is opened in conducting this moment
3, the multiplication of voltage charge mode of realization storage battery.Behind the charging process time-delay certain hour, U
OutDrop to below the charging voltage twice, the output of comparator 2 is low level by the high level upset, closes Q this moment
3Because charge circuit disconnects, U
OutBegin again to rise, when the low light level shines, repeat this state.
2. normal charge: the power storage of opto-electronic conversion is in capacitor C during intense light irradiation
1The time, because U
In〉=U
G1, comparator 1 output U
0By the low level upset is high level, U
5Be output as low level, Q
7Open-minded, close Q this moment
2, the Boost circuit quits work.Simultaneously, U
0Be high level, D
1Q is opened in conducting
3, realized the direct charging controlled function of storage battery.
The conversion of two states is magnitude of voltage and the U that detects on the electric capacity
OutHeight finish charge switch Q automatically
2Open frequency be subjected to U
InControl, while and capacitor C
1Capacity relevant, C
1Big more then open frequency is low more.To rise the operation mode of power supply be by the output of logic switch control to pump among Fig. 2, its output voltage and U
G2Compare and control charge switch pipe Q
3State realize.
The basic electric parameter of model machine: rated input power 8.5W, output-current rating 500mA, batteries is two and four series lithium batteries (12.8V, overcharged voltage 16.8V are pressed in overdischarge) of 3.6V/4.0A, solar cell is 19V/500mA.In order to improve the charging conversion efficiency, diode is selected Schottky 1N5819 for use in the circuit, switching device Q
1, Q
2, Q
3Selecting conducting resistance for use is mosfet device P-4407, the IRFZ44N of milliohm level.Gate circuit is selected CD4011, CD4069 for use, and inductance is selected high-frequency iron sial magnetic material, storage capacitor C for use
1Select the 25V/2.2F micro capacitance for use, D
1, D
2Latent pressure value be 8.2,34V, all devices are paster (SMT) encapsulation.Adopt voltage-controlled type micro-power device and power electronics integrated technology during making.
Experiment is carried out according under the condition at indoor weak light, the selection floating voltage is that 19V, short circuit current are the 200mA solar cell, and the adjustment module pump rises the duty ratio of power supply switch tube, and making the solar cell output voltage is 10V, the maximum that pump rises power supply is output as 30V, realizes charge in batteries.Through the reality test, output voltage U under the low light level shines
Out=30V, pump up voltage are 3 times of input voltage, and output voltage ripple is little.Disconnecting consumers, the mensuration no-load current is 18.5mA.For analysis module voltage power supply scope, at U
InModule still works on during=5V, at this moment charge switch pipe Q
2Switching frequency elongated, the charge in batteries time reduces to some extent.Constantly change intensity of illumination and obtain measured data, as shown in the table.
As seen from the above table, it is 98.12% that three groups of data computation draw average efficiency, shows that the module transmission efficiency of design is higher, has good working performance.
Claims (4)
1. light intensity self-regulation solar recharging modular converter, system's charge point adopts the voltage detecting closed-loop control, it is characterized in that this module comprises: comparator 1, comparator 2, logic switch, pumping source, oscillator, charge switch and battery; When input voltage was less than threshold voltage when the low light level shone, comparator 1, logic switch, oscillator, pumping source, comparator 2, charge switch, battery connected and composed charge circuit successively; When input voltage was more than or equal to threshold voltage during intense light irradiation, comparator 1, charge switch and battery connected and composed charge circuit successively.
2. a kind of light intensity self-regulation solar recharging modular converter according to claim 1 is characterized in that oscillator is the pulse signal of 500kHZ, by the 6th not gate (U
6) and the 5th resistance (R
5) compose in parallel parallel circuits, this parallel circuits again with the 7th not gate (U
7) be composed in series series circuit, this series circuit again with the second electric capacity (C
2) compose in parallel parallel circuits.
3. a kind of light intensity self-regulation solar recharging modular converter according to claim 1 is characterized in that comparator 1 is the intensity monitor comparison circuit, by the first not gate (U
1), the second not gate (U
2) be composed in series series circuit, this series circuit and the second resistance (R
2) compose in parallel parallel circuits, this parallel circuits more successively with the first diode (U
G1), the first resistance (R
1) be composed in series series circuit.
4. a kind of light intensity self-regulation solar recharging modular converter according to claim 1 is characterized in that, comparator 2 is for multiplication of voltage charging comparison circuit, by the 3rd not gate (U
3), the 4th not gate (U
4) be composed in series series circuit, this series circuit and the 4th resistance (R
4) compose in parallel parallel circuits, this parallel circuits more successively with the second diode (U
G2), the 3rd resistance (R
3) be composed in series series circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120057492XU CN201947020U (en) | 2011-03-07 | 2011-03-07 | Solar charging conversion module with light intensity self-adjusting function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120057492XU CN201947020U (en) | 2011-03-07 | 2011-03-07 | Solar charging conversion module with light intensity self-adjusting function |
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| Publication Number | Publication Date |
|---|---|
| CN201947020U true CN201947020U (en) | 2011-08-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120057492XU Expired - Fee Related CN201947020U (en) | 2011-03-07 | 2011-03-07 | Solar charging conversion module with light intensity self-adjusting function |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103765726A (en) * | 2010-11-02 | 2014-04-30 | 法国毕蓬多夫公司 | Controlling dynamic systems by measuring the no-load voltage of a photovoltaic generator |
| CN105356583A (en) * | 2015-12-03 | 2016-02-24 | 深圳市华杰电气技术有限公司 | Weak light and weak wind charging control circuit |
| CN109510276A (en) * | 2018-12-12 | 2019-03-22 | 湖南亿福照明科技有限公司 | Photovoltaic charged control circuit and photovoltaic charged control device |
| CN109687546A (en) * | 2018-12-22 | 2019-04-26 | 深圳市聚纵新能源科技有限公司 | A kind of power gain charging control circuit and its control method |
-
2011
- 2011-03-07 CN CN201120057492XU patent/CN201947020U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103765726A (en) * | 2010-11-02 | 2014-04-30 | 法国毕蓬多夫公司 | Controlling dynamic systems by measuring the no-load voltage of a photovoltaic generator |
| CN105356583A (en) * | 2015-12-03 | 2016-02-24 | 深圳市华杰电气技术有限公司 | Weak light and weak wind charging control circuit |
| CN105356583B (en) * | 2015-12-03 | 2018-05-18 | 深圳市华杰电气技术有限公司 | Weak light and weak wind charging control circuit |
| CN109510276A (en) * | 2018-12-12 | 2019-03-22 | 湖南亿福照明科技有限公司 | Photovoltaic charged control circuit and photovoltaic charged control device |
| CN109687546A (en) * | 2018-12-22 | 2019-04-26 | 深圳市聚纵新能源科技有限公司 | A kind of power gain charging control circuit and its control method |
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| 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: 20110824 Termination date: 20130307 |