CN102790420A - Charging device on basis of solar electric plate - Google Patents
Charging device on basis of solar electric plate Download PDFInfo
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- CN102790420A CN102790420A CN2012103091770A CN201210309177A CN102790420A CN 102790420 A CN102790420 A CN 102790420A CN 2012103091770 A CN2012103091770 A CN 2012103091770A CN 201210309177 A CN201210309177 A CN 201210309177A CN 102790420 A CN102790420 A CN 102790420A
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Abstract
The invention discloses a charging device on the basis of a solar electric plate, which not only can be used for preventing overcharge, but also can be used for charging under the condition of the insufficient sunlight. The charging device comprises a charge control circuit and positive and negative electric plate buses; the positive electric plate bus is connected with a positive charge bus; a switching tube and a sampling resistance are connected in series between a negative charge bus and the negative electric plate bus; the output end of the sampling resistance is connected with the sampling end of the charge control circuit; the control end of the switching tube is connected with the output end of the charge control circuit; a charging voltage sampling circuit is arranged between the positive electric plate bus and the negative charge bus or/and a charging current sampling circuit is arranged in series between the negative charge bus and the negative charge output end; an electric plate voltage sampling circuit is arranged between the positive electric plate bus and the negative electric plate bus; and the charging voltage sampling circuit and the charging current sampling circuit are respectively connected with the feed-in end of the charge control circuit by a charge feedback circuit and the electric plate voltage sampling circuit is connected with the feed-in end of the charge control circuit by an electric plate feedback circuit. According to the charging device, the utilization rate of solar energy is greatly improved.
Description
Technical field
The present invention relates to charging device, refer more particularly to a kind of charging device based on the solar energy electroplax.
Background technology
As its name suggests, the solar energy electroplax could generate electricity when arranged sunshine, can not generate electricity at the night that does not have sunshine.In order also to use solar energy at night; Just can only the form of energy that daytime, solar energy electroplax electricity can change into other be stored through charging device; For example convert it into chemical energy and be stored in the storage battery, to night again energy stored is discharged.
At present; Traditional charging modes has two kinds: a kind of be with the output of solar energy electroplax directly and storage battery and connecing storage battery is charged, though this charging modes can not cause solar energy waste of electric energy that electroplax is sent out, still; Owing to the output voltage of the solar energy electroplax power along with illumination changes; When illumination was very strong, the too high output voltage of solar energy electroplax can cause storage battery and overcharge, and shortens the useful life of storage battery; Another kind is that the solar energy electroplax is charged to storage battery through charging device; Traditional charging device just carries out simple conversion to the output voltage of solar energy electroplax; Make the output voltage of charging device adapt, under the condition of illumination natural feets such as cloudy day, because the output voltage of solar energy electroplax is lower with corresponding storage battery; Charging device can't charge to storage battery, causes the waste of solar energy electroplax energy.
Summary of the invention
Technical problem to be solved by this invention is: the charging device based on the solar energy electroplax that provides a kind of and can prevent to overcharge, can under sunshine not enough condition, charge to storage battery again.
For solving above-mentioned technical problem; The technical scheme that the present invention adopted is: based on the charging device of solar energy electroplax; Comprise: charging control circuit, positive and negative charging output and the corresponding positive and negative charging bus that links to each other with positive and negative charging output and with the corresponding positive and negative electroplax bus that links to each other of solar energy electroplax positive and negative electrode; Positive electroplax bus links to each other with the bus that just charges; The charging control power supply of promising charging control circuit power supply is set between the positive and negative electroplax bus; String is provided with charge switch circuit and conducting current sampling circuit between described negative charging bus and the negative electricity plate bus, and the output of conducting current sampling circuit links to each other with the sampling end of charging control circuit, and the control end of charge switch circuit links to each other with the output of charging control circuit; Be provided with the charging voltage sample circuit between positive electroplax bus and the negative charging bus; String is provided with the charging current sample circuit between negative charging bus and the negative charging output, is provided with the electroplax voltage sampling circuit between positive electroplax bus and the negative electricity plate bus, also is provided with charging between positive electroplax bus and the negative charging bus and detects power supply; The charging voltage sample circuit links to each other with the feed side of charging control circuit through the charging feedback circuit with the charging current sample circuit, and the electroplax voltage sampling circuit links to each other with the feed side of charging control circuit through the electroplax feedback circuit.
Described charging feedback circuit comprises: be arranged on first reference voltage circuit, second reference voltage circuit and current feedback comparison circuit, the Voltage Feedback of charging between the positive and negative output that detects power supply and compare circuit and photoelectric isolating circuit; First reference voltage circuit is higher than the output voltage of second reference voltage circuit; The input of current feedback comparison circuit links to each other with the output of second reference voltage circuit, the output of charging current sample circuit respectively; The Voltage Feedback relatively input of circuit links to each other with the output of first reference voltage circuit, the output of charging voltage sample circuit respectively; The output of current feedback comparison circuit, the Voltage Feedback relatively output of circuit link to each other with the input of photoelectric isolating circuit, and the output of photoelectric isolating circuit links to each other with the feed side of said charging control circuit; Described electroplax feedback circuit comprises that the 3rd reference voltage circuit, the Voltage Feedback between the positive and negative output that is arranged on charging control power supply compares circuit; The Voltage Feedback relatively input of circuit links to each other with the output of the 3rd reference voltage circuit and the output of said electroplax voltage sampling circuit respectively, and the Voltage Feedback relatively output of circuit links to each other with the feed side of charging control circuit.
Described electroplax feedback circuit also comprises: photoelectric isolating circuit, the Voltage Feedback relatively output of circuit link to each other with the input of photoelectric isolating circuit, and the output of photoelectric isolating circuit links to each other with the feed side of said charging control circuit.
In described charging feedback circuit, be respectively arranged with unidirectional guiding circuit between the feed side of Voltage Feedback comparison circuit and current feedback comparison circuit output and charging control circuit separately.
Described second reference voltage circuit comprises first reference voltage circuit, is provided with bleeder circuit between the output of first reference voltage circuit.
Be provided with freewheeling circuit between described charge switch circuit and the positive electroplax bus, negative charging bus is gone here and there between charge switch circuit and charging current sample circuit and is provided with accumulator.
Described positive electroplax bus links to each other with the bus that just charges through unidirectional guiding circuit.
Described charging current sample circuit also is connected to hooping position circuit.
Described unidirectional guiding circuit, hooping position circuit are diode, and described charge switch circuit is a metal-oxide-semiconductor.
The invention has the beneficial effects as follows: feedback circuit links to each other with the feed side of charging control circuit the charging voltage sample circuit among the present invention or/and the charging current sample circuit passes through to charge; The electroplax voltage sampling circuit also links to each other with the feed side of charging control circuit through the electroplax feedback circuit; Realized the closed-loop control of charging process; Prevented effectively to overcharge, and can under the condition of illumination deficiency, charge, significantly improved solar energy utilization rate.In addition, through adopting charging voltage sample circuit and charging current sample circuit simultaneously, produce the reference voltage of two different potentials through first, second reference voltage circuit in the charging feedback circuit; Make when cell voltage to be charged is low; It is carried out constant current charge, when cell voltage to be charged is higher, it is carried out constant voltage charge; This charging method more meets the characteristic of battery, thereby prolongs its useful life.
Description of drawings
Fig. 1 is an electric theory structure sketch map of the present invention.
Fig. 2 is the circuit diagram of a kind of embodiment of Fig. 1.
Reference numeral among Fig. 1, Fig. 2: 1, charging control circuit, 2, unidirectional guiding circuit, 3, positive electroplax bus, 4, negative electricity plate bus; 5, the bus that just charging, 6, negative charging bus, 7, charging control power supply, 8, charging detects power supply; 9, charge switch circuit, 10, the conducting current sampling circuit, 11, the charging voltage sample circuit, 12, the charging current sample circuit; 13, first reference voltage circuit, 15, bleeder circuit, 16, the current feedback comparison circuit, 17, Voltage Feedback circuit relatively; 18, photoelectric isolating circuit, the 19, the 3rd reference voltage circuit, 20, Voltage Feedback circuit relatively, 21, photoelectric isolating circuit; 22, electroplax voltage sampling circuit, 23, accumulator, 24, clamp circuit, 25, freewheeling circuit; 31, the solar energy electroplax is anodal, and 32, solar energy electroplax negative pole, 33, the output that charges just, 34, negative charging output.
Embodiment
Below in conjunction with accompanying drawing, describe specific embodiments of the present invention in detail.
Like Fig. 1, shown in Figure 2; Charging device based on the solar energy electroplax of the present invention; Comprise charging control circuit 1, just charge output 33, negative charging output 34, the bus 5 that just charges that links to each other with the output 33 that just charges, the negative charging bus 6 that links to each other with negative charging output 34 and negative electricity plate bus 4 that the positive electroplax bus 3 that links to each other with solar energy electroplax positive pole 31 links to each other with solar energy electroplax negative pole 32; Positive electroplax bus 3 links to each other through the diode D34 as unidirectional guiding circuit 2 with the bus 5 that just charges; The charging control power supply 7 of promising charging control circuit 1 power supply is set between the positive and negative electroplax bus 3 and 4; String is provided with as the switch MOS pipe Q2 of charge switch circuit 9 with as the resistance R 44 of conducting current sampling circuit 10 between described negative charging bus 6 and the negative electricity plate bus 4; The output of conducting current sampling circuit 10 is that the end that resistance R 44 links to each other with the source electrode of switch MOS pipe Q2 links to each other with the sampling end of charging control circuit 1; The control end of charge switch circuit 9 is that the grid of metal-oxide-semiconductor Q2 links to each other with the output of charging control circuit 1; Be provided with charging voltage sample circuit 11 between positive electroplax bus 3 and the negative charging bus 6; String is provided with charging current sample circuit 12 between negative charging bus 6 and the negative charging output 34; On the charging current sample circuit 12 and be connected to the fast recovery diode D6 as hooping position circuit 24, adjust sample rate current for ease, charging current sample circuit 12 is by resistance R 47, R48 and R49 and connect and form; Be provided with electroplax voltage sampling circuit 22 between positive electroplax bus 3 and the negative electricity plate bus 4; Also be provided with charging between positive electroplax bus 3 and the negative charging bus 6 and detect power supply 8, charging voltage sample circuit 11 links to each other with the feed side of charging control circuit 1 through the charging feedback circuit with charging current sample circuit 12, and electroplax voltage sampling circuit 22 links to each other with the feed side of charging control circuit 1 through the electroplax feedback circuit; In the present embodiment; Described charging feedback circuit comprises: be arranged on first reference voltage circuit 13, second reference voltage circuit and current feedback comparison circuit 16 between the positive and negative output that charging detects power supply 8, Voltage Feedback relatively circuit 17 and photoelectric isolating circuit 18; Second reference voltage circuit comprises: first reference voltage circuit 13 (multiplexing) and be arranged on the bleeder circuit of being made up of resistance R 56 and R57 15 on first reference voltage circuit, 13 outputs; The positive and negative input of current feedback comparison circuit 16 links to each other with the output of second reference voltage circuit, the output of charging current sample circuit 12 respectively; The Voltage Feedback relatively positive and negative input of circuit 17 links to each other with the output of first reference voltage circuit 13, the output of charging voltage sample circuit 11 respectively; Current feedback comparison circuit 16, Voltage Feedback relatively circuit 17 output separately link to each other with the input of photoelectric isolating circuit 18 with D21 through diode D20 respectively, and the output of photoelectric isolating circuit 18 links to each other with the feed side of said charging control circuit 1; Described electroplax feedback circuit comprises: be arranged on relatively circuit 20 and as the photoelectric isolating circuit 21 of reverse drive circuit of the 3rd reference voltage circuit 19 between the positive and negative output of charging control power supply 7, Voltage Feedback; The Voltage Feedback relatively positive and negative input of circuit 20 links to each other with the output of the 3rd reference voltage circuit 19 and the output of electroplax voltage sampling circuit 22 respectively; The Voltage Feedback relatively output of circuit 20 links to each other with the input of photoelectric isolating circuit 21, and the output of photoelectric isolating circuit 21 links to each other with the feed side of said charging control circuit 1.
As be respectively arranged with between the drain electrode of the switch MOS pipe of charge switch circuit 9 and positive electroplax bus 3 and the negative charging bus 6 sustained diode 17 as freewheeling circuit 25, as the transformer T2 of accumulator 23 (as energy storage inductor with).During practical application, usually the primary coil of transformer T2 is sealed in the negative charging bus 6 as energy storage inductor usefulness, the secondary coil of transformer T2 can leave unused, and also can be used as out-put supply and uses, and extra energy is provided.
When solar illuminating is sufficient; The voltage that is aligned between charging bus 5 and the negative charging bus 6 by charging voltage sample circuit 11 detects; Be equivalent to the storage battery voltage detected and (compare with storage battery voltage to be charged; Have more the tube voltage drop of a diode D34), when the voltage of storage battery hangs down, when the output voltage of charging voltage sample circuit 11 (voltage of amplifier U9B backward end) is lower than the output voltage (voltage of amplifier U9B forward end) of first reference voltage circuit 13; Amplifier U9B exports high level, and diode D21 ends; The charging current of being treated charging accumulator by charging current sample circuit 12 detects, when charging current when setting current value, the backward end voltage of amplifier U9A is greater than forward end voltage; Amplifier U9A output low level; Optocoupler U19 conducting in the photoelectric isolating circuit 18, charging control circuit 1 reduces pulse duration through regulating duty ratio, and output current reduces; Make charging current constant, realize constant current charge in certain settings.When solar irradiation abundance and battery tension were low, charging current can not occur less than the situation of setting current value.
If the voltage of storage battery has been in higher state, then charging current is less, and the backward end voltage of amplifier U9A is less than forward end voltage; Amplifier U9A exports high level, and diode D20 ends, when the output voltage of charging voltage sample circuit 11 (voltage of amplifier U9B backward end) is higher than the output voltage (voltage of amplifier U9B forward end) of first reference voltage circuit 13; Amplifier U9B output low level; Optocoupler U19 conducting in the photoelectric isolating circuit 18, charging control circuit 1 reduces pulse duration through regulating duty ratio, and output voltage reduces; Making charge in batteries voltage be unlikely too high generation overcharges; Along with the rising gradually of battery tension, charging current reduces gradually simultaneously, thereby realizes from the conversion of constant current charge to constant voltage charge.
When solar irradiation is not enough; Solar energy electroplax (also claiming electricity sun ability battery or solar energy photovoltaic panel) can't provide enough energy output; Voltage between the then positive and negative charging bus 5 and 6 is dragged down by storage battery; When the output voltage of charging voltage sample circuit 11 (voltage of amplifier U9B backward end) was lower than the output voltage (voltage of amplifier U9B forward end) of first reference voltage circuit 13, amplifier U9B exported high level, and diode D21 ends; Simultaneously, charging current very little (if this moment have run counter to law of conservation of energy) at this moment greater than the charging current of steady state value, the backward end voltage of amplifier U9A is less than forward end voltage, and amplifier U9A exports high level, and diode D20 ends, and like this, optocoupler U19 ends.Like this, if do not have electroplax voltage sampling circuit 22, Voltage Feedback relatively circuit 20 and the 3rd reference voltage circuit 19 and as the photoelectric isolating circuit 21 of reverse drive circuit, whole charging device no-output causes the waste of solar cell energy.
This charging device is when illumination deficiency (like the cloudy day); When the output voltage of electroplax voltage sampling circuit 22 (the backward end voltage of amplifier U18B) was lower than the output voltage (the forward end voltage of amplifier U18B) of the 3rd reference voltage circuit 19, amplifier U18B exported high level, optocoupler U20 conducting; Charging control circuit 1 is through trigger switch metal-oxide-semiconductor Q2; Make metal-oxide-semiconductor Q2 conducting, storage battery is charged, thereby improved the utilization ratio of solar cell.
Claims (9)
1. based on the charging device of solar energy electroplax; Comprise: charging control circuit, positive and negative charging output and the corresponding positive and negative charging bus that links to each other with positive and negative charging output and with the corresponding positive and negative electroplax bus that links to each other of solar energy electroplax positive and negative electrode; Positive electroplax bus links to each other with the bus that just charges; The charging control power supply of promising charging control circuit power supply is set between the positive and negative electroplax bus; It is characterized in that: string is provided with charge switch circuit and conducting current sampling circuit between described negative charging bus and the negative electricity plate bus; The output of conducting current sampling circuit links to each other with the sampling end of charging control circuit; The control end of charge switch circuit links to each other with the output of charging control circuit; Be provided with the charging voltage sample circuit between positive electroplax bus and the negative charging bus or/and between negative charging bus and the negative charging output string be provided with the charging current sample circuit, be provided with the electroplax voltage sampling circuit between positive electroplax bus and the negative electricity plate bus, positive electroplax bus also being provided with the detection power supply that charges with bearing to charge between the bus; The charging voltage sample circuit links to each other with the feed side of charging control circuit through the charging feedback circuit with the charging current sample circuit, and the electroplax voltage sampling circuit links to each other with the feed side of charging control circuit through the electroplax feedback circuit.
2. charging device as claimed in claim 1; It is characterized in that: described charging feedback circuit comprises that first reference voltage circuit, second reference voltage circuit and current feedback comparison circuit, the Voltage Feedback between the positive and negative output that is arranged on charging detection power supply compares circuit and photoelectric isolating circuit; First reference voltage circuit is higher than the output voltage of second reference voltage circuit; The input of current feedback comparison circuit links to each other with the output of second reference voltage circuit, the output of charging current sample circuit respectively; The Voltage Feedback relatively input of circuit links to each other with the output of first reference voltage circuit, the output of charging voltage sample circuit respectively; The output of current feedback comparison circuit, the Voltage Feedback relatively output of circuit link to each other with the input of photoelectric isolating circuit, and the output of photoelectric isolating circuit links to each other with the feed side of said charging control circuit; Described electroplax feedback circuit comprises that the 3rd reference voltage circuit, the Voltage Feedback between the positive and negative output that is arranged on charging control power supply compares circuit and reverse drive circuit; The Voltage Feedback relatively input of circuit links to each other with the output of the 3rd reference voltage circuit and the output of said electroplax voltage sampling circuit respectively; The Voltage Feedback relatively output of circuit links to each other with the input of reverse drive circuit, the output of reverse drive circuit with link to each other with the feed side of charging control circuit.
3. charging device as claimed in claim 2 is characterized in that: described reverse drive circuit is a photoelectric isolating circuit.
4. charging device as claimed in claim 2 is characterized in that: in described charging feedback circuit, be respectively arranged with unidirectional guiding circuit between the feed side of Voltage Feedback comparison circuit and current feedback comparison circuit output and charging control circuit separately.
5. charging device as claimed in claim 2 is characterized in that: described second reference voltage circuit comprises first reference voltage circuit, is provided with bleeder circuit between the output of first reference voltage circuit.
6. charging device as claimed in claim 1 is characterized in that: be provided with freewheeling circuit between described charge switch circuit and the positive electroplax bus, negative charging bus is gone here and there between charge switch circuit and charging current sample circuit and is provided with accumulator.
7. charging device as claimed in claim 1 is characterized in that: described positive electroplax bus links to each other with the bus that just charges through unidirectional guiding circuit.
8. charging device as claimed in claim 1 is characterized in that: described charging current sample circuit also is connected to hooping position circuit.
9. like each described charging device in the claim 1 to 8, it is characterized in that: described unidirectional guiding circuit, hooping position circuit are diode, and described charge switch circuit is a metal-oxide-semiconductor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210309177.0A CN102790420B (en) | 2012-08-28 | 2012-08-28 | Charging device on basis of solar electric plate |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210309177.0A CN102790420B (en) | 2012-08-28 | 2012-08-28 | Charging device on basis of solar electric plate |
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| Publication Number | Publication Date |
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| CN102790420A true CN102790420A (en) | 2012-11-21 |
| CN102790420B CN102790420B (en) | 2014-12-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210309177.0A Expired - Fee Related CN102790420B (en) | 2012-08-28 | 2012-08-28 | Charging device on basis of solar electric plate |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104983116A (en) * | 2015-05-29 | 2015-10-21 | 深圳市林央技术有限公司 | Solar energy purifying helmet |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101630851A (en) * | 2008-07-16 | 2010-01-20 | 扬州森源电气有限公司 | Wind-light complementary generating control device for ships |
| CN202721478U (en) * | 2012-08-28 | 2013-02-06 | 江苏索尔光电科技有限公司 | Charging device based on solar panel |
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2012
- 2012-08-28 CN CN201210309177.0A patent/CN102790420B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101630851A (en) * | 2008-07-16 | 2010-01-20 | 扬州森源电气有限公司 | Wind-light complementary generating control device for ships |
| CN202721478U (en) * | 2012-08-28 | 2013-02-06 | 江苏索尔光电科技有限公司 | Charging device based on solar panel |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104983116A (en) * | 2015-05-29 | 2015-10-21 | 深圳市林央技术有限公司 | Solar energy purifying helmet |
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| CN102790420B (en) | 2014-12-24 |
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