CN102790420B - Charging device on basis of solar electric plate - Google Patents
Charging device on basis of solar electric plate Download PDFInfo
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- CN102790420B CN102790420B CN201210309177.0A CN201210309177A CN102790420B CN 102790420 B CN102790420 B CN 102790420B CN 201210309177 A CN201210309177 A CN 201210309177A CN 102790420 B CN102790420 B CN 102790420B
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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 solar energy electroplax.
Background technology
As its name suggests, solar energy electroplax could generate electricity when there being sunshine, can not generate electricity not having the night at sunshine.In order to also can solar energy be used at night, just by charging device, the form of energy that solar energy electroplax electricity on daytime can change into other can only be stored, such as converting it into chemical energy is stored in storage battery, to night again by store fault offset out.
At present, traditional charging modes has two kinds: a kind of be by the output of solar energy electroplax directly and storage battery connecing storage battery is charged, though this charging modes can not cause solar energy electroplax generate electricity can waste, but, because the output voltage of solar energy electroplax changes along with the power of illumination, when illumination strongly time, 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 charged to storage battery by charging device by solar energy electroplax, traditional charging device just carries out simple conversion to the output voltage of solar energy electroplax, the output voltage of charging device and corresponding storage battery are adapted, under the condition of the illumination natural feets such as cloudy day, because the output voltage of solar energy electroplax is lower, charging device cannot 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: provide a kind of and can prevent from overcharging, again can to the charging device based on solar energy electroplax that storage battery charges under the condition of deficiency at sunshine.
For solving above-mentioned technical problem, the technical solution adopted in the present invention is: based on the charging device of solar energy electroplax, comprise: charging control circuit, just, negative charging output and with just, negative charging output correspondence is just being connected, negative charging bus and with solar energy electroplax just, negative pole correspondence is just being connected, negative electricity plate bus, positive electroplax bus is connected with the bus that just charges, just, the charging control power supply that promising charging control circuit is powered is set between negative electricity plate bus, go here and there between described negative charging bus and negative electricity plate bus and be provided with charge switch circuit and On current sample circuit, the output of On current sample circuit is connected with the sampling end of charging control circuit, the control end of charge switch circuit is connected with the output of charging control circuit, positive electroplax bus and negative charging between bus are provided with charging voltage sample circuit, negative charging bus and negative charge with going here and there between output be provided with charge current sample circuit, electroplax voltage sampling circuit is provided with between positive electroplax bus and negative electricity plate bus, positive electroplax bus and negative charge with being also provided with to charge between bus detect power supply, charging voltage sample circuit is connected with the feed side of charging control circuit by charging feedback circuit with charge current sample circuit, electroplax voltage sampling circuit is connected with the feed side of charging control circuit by electroplax feedback circuit.
Described charging feedback circuit comprises: be arranged on charging and just detecting power supply, the first reference voltage circuit between negative output terminal, second reference voltage circuit and current feedback comparison circuit, Voltage Feedback compares circuit and photoelectric isolating circuit, first reference voltage circuit is higher than the output voltage of the second reference voltage circuit, the input of current feedback comparison circuit respectively with the output of the second reference voltage circuit, the output of charge current sample circuit is connected, the input that Voltage Feedback compares circuit respectively with the output of the first reference voltage circuit, the output of charging voltage sample circuit is connected, the output of current feedback comparison circuit, the input of output and photoelectric isolating circuit that Voltage Feedback compares circuit is connected, the output of photoelectric isolating circuit is connected with the feed side of described charging control circuit, described electroplax feedback circuit comprises the 3rd reference voltage circuit, the Voltage Feedback be arranged between positive and negative output that charging controls power supply and compares circuit, the input that Voltage Feedback compares circuit is connected with the output of described electroplax voltage sampling circuit with the output of the 3rd reference voltage circuit respectively, and the feed side of output and charging control circuit that Voltage Feedback compares circuit is connected.
Described electroplax feedback circuit also comprises: photoelectric isolating circuit, and the input of output and photoelectric isolating circuit that Voltage Feedback compares circuit is connected, and the output of photoelectric isolating circuit is connected with the feed side of described charging control circuit.
In described charging feedback circuit, Voltage Feedback compare be respectively arranged with between the respective output of circuit and current feedback comparison circuit and the feed side of charging control circuit unidirectional to circuit.
The second described reference voltage circuit comprises the first reference voltage circuit, is provided with bleeder circuit between the output of the first reference voltage circuit.
Be provided with freewheeling circuit between described charge switch circuit and positive electroplax bus, negative charging bus is gone here and there and is provided with accumulator between charge switch circuit and charge current sample circuit.
Described positive electroplax bus is connected with the bus that just charges to circuit by unidirectional.
Described charge current sample circuit is also connected to clamp circuit.
Described be unidirectionally diode to circuit, clamp circuit, described charge switch circuit is metal-oxide-semiconductor.
The invention has the beneficial effects as follows: the charging voltage sample circuit in the present invention is or/and charge current sample circuit is connected with the feed side of charging control circuit by charging feedback circuit, electroplax voltage sampling circuit is also connected with the feed side of charging control circuit by electroplax feedback circuit, achieve the closed-loop control of charging process, effectively prevent and overcharge, and can charge under the condition of illumination deficiency, significantly improve the utilance of solar energy.In addition, by adopting charging voltage sample circuit and charge current sample circuit simultaneously in charging feedback circuit, the reference voltage of two different potentials is produced by first, second reference voltage circuit, make when cell voltage to be charged is lower, constant current charge is carried out to it, when cell voltage to be charged is higher, constant voltage charge is carried out to it, this charging method more meets the characteristic of battery, thus extends its useful life.
Accompanying drawing explanation
Fig. 1 is electric theory structure schematic diagram of the present invention.
Fig. 2 is the circuit diagram of a kind of embodiment of Fig. 1.
Fig. 1, Reference numeral in Fig. 2: 1, charging control circuit, 2, unidirectional to circuit, 3, positive electroplax bus, 4, negative electricity plate bus, 5, just charging bus, 6, negative charging bus, 7, charging controls power supply, 8, charging detects power supply, 9, charge switch circuit, 10, On current sample circuit, 11, charging voltage sample circuit, 12, charge current sample circuit, 13, first reference voltage circuit, 15, bleeder circuit, 16, current feedback comparison circuit, 17, Voltage Feedback compares circuit, 18, photoelectric isolating circuit, 19, 3rd reference voltage circuit, 20, Voltage Feedback compares circuit, 21, photoelectric isolating circuit, 22, electroplax voltage sampling circuit, 23, accumulator, 24, clamp circuit, 25, freewheeling circuit, 31, solar energy electroplax positive pole, 32, solar energy electroplax negative pole, 33, just charging output, 34, negative charging output.
Embodiment
Below in conjunction with accompanying drawing, describe specific embodiment of the invention scheme in detail.
As Fig. 1, shown in Fig. 2, charging device based on solar energy electroplax of the present invention, comprise charging control circuit 1, just charging output 33, negative charging output 34, the just charging bus 5 be connected with the output 33 that just charges, the negative electricity plate bus 4 that the negative charging bus 6 be connected with negative charging output 34 and the positive electroplax bus 3 be connected with solar energy electroplax positive pole 31 are connected with solar energy electroplax negative pole 32, positive electroplax bus 3 and the bus 5 that just charges are by being connected as the unidirectional diode D34 to circuit 2, just, the charging arranging the power supply of promising charging control circuit 1 between negative electricity plate bus 3 and 4 controls power supply 7, go here and there between described negative charging bus 6 and negative electricity plate bus 4 and be provided with the switch MOS pipe Q2 as the charge switch circuit 9 and resistance R44 as On current sample circuit 10, one end that the output of On current sample circuit 10 and resistance R44 are connected with the source electrode of switch MOS pipe Q2 is connected with the sampling end of charging control circuit 1, the control end of charge switch circuit 9 and the grid of metal-oxide-semiconductor Q2 are connected with the output of charging control circuit 1, positive electroplax bus 3 and negative charging between bus 6 are provided with charging voltage sample circuit 11, negative charging bus 6 and negative charge with going here and there between output 34 be provided with charge current sample circuit 12, on charge current sample circuit 12 and the fast recovery diode D6 be connected to as clamp circuit 24, conveniently adjust sample rate current, charge current sample circuit 12 is by resistance R47, R48 and R49 also connects formation, electroplax voltage sampling circuit 22 is provided with between positive electroplax bus 3 and negative electricity plate bus 4, positive electroplax bus 3 and negative charge with being also provided with to charge between bus 6 detect power supply 8, charging voltage sample circuit 11 is connected by the feed side of charging feedback circuit with charging control circuit 1 with charge current sample circuit 12, electroplax voltage sampling circuit 22 is connected with the feed side of charging control circuit 1 by electroplax feedback circuit, in the present embodiment, described charging feedback circuit comprises: be arranged on charging and just detecting power supply 8, the first reference voltage circuit 13 between negative output terminal, second reference voltage circuit and current feedback comparison circuit 16, Voltage Feedback compares circuit 17 and photoelectric isolating circuit 18, second reference voltage circuit comprises: the first reference voltage circuit 13 (multiplexing) and the bleeder circuit 15 be made up of resistance R56 and R57 be arranged on the first reference voltage circuit 13 output, current feedback comparison circuit 16 just, negative input end respectively with the output of the second reference voltage circuit, the output of charge current sample circuit 12 is connected, Voltage Feedback is just comparing circuit 17, negative input end respectively with the output of the first reference voltage circuit 13, the output of charging voltage sample circuit 11 is connected, current feedback comparison circuit 16, Voltage Feedback compares the respective output of circuit 17 and is connected with the input of photoelectric isolating circuit 18 respectively by diode D20 with D21, the output of photoelectric isolating circuit 18 is connected with the feed side of described charging control circuit 1, described electroplax feedback circuit comprises: the 3rd reference voltage circuit 19, the Voltage Feedback be arranged between positive and negative output that charging controls power supply 7 compares circuit 20 and the photoelectric isolating circuit 21 as reverse driving circuit, the positive and negative input that Voltage Feedback compares circuit 20 is connected with the output of electroplax voltage sampling circuit 22 with the output of the 3rd reference voltage circuit 19 respectively, the output that Voltage Feedback compares circuit 20 is connected with the input of photoelectric isolating circuit 21, and the output of photoelectric isolating circuit 21 is connected with the feed side of described charging control circuit 1.
The sustained diode 17 as freewheeling circuit 25, the transformer T2 as accumulator 23 (as energy storage inductor use) is being respectively arranged with as the drain electrode of the switch MOS pipe of charge switch circuit 9 and positive electroplax bus 3 and negative charging between bus 6.During practical application, usually sealed in by the primary coil of transformer T2 as energy storage inductor use in negative charging bus 6, the secondary coil of transformer T2 can leave unused, and also can use as out-put supply, provides extra energy.
When solar illuminating is sufficient, aligned charging bus 5 by charging voltage sample circuit 11 and born the voltage charged between bus 6 and detect, be equivalent to detect (compared with storage battery both end voltage to be charged to storage battery both end voltage, have more the tube voltage drop of a diode D34), when the voltage of storage battery is lower, during output voltage (voltage of amplifier U9B forward end) lower than the first reference voltage circuit 13 of the output voltage (voltage of amplifier U9B backward end) of charging voltage sample circuit 11, amplifier U9B exports high level, and diode D21 ends; The charging current being treated charging accumulator by charge current sample circuit 12 detects, when charging current is greater than 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 photoelectric isolating circuit 18, charging control circuit 1 makes pulse duration reduce by regulating duty ratio, and output current reduces, make charging current constant in certain settings, realize constant current charge.When solar irradiation is sufficient and battery tension is lower, the situation that charging current is less than setting current value there will not be.
If the voltage of storage battery has been in higher state, then charging current is less, the backward end voltage of amplifier U9A is less than forward end voltage, amplifier U9A exports high level, diode D20 ends, during output voltage (voltage of amplifier U9B forward end) higher than the first reference voltage circuit 13 of the output voltage (voltage of amplifier U9B backward end) of charging voltage sample circuit 11, amplifier U9B output low level, optocoupler U19 conducting in photoelectric isolating circuit 18, charging control circuit 1 makes pulse duration reduce by regulating duty ratio, output voltage reduces, make charge in batteries voltage be unlikely too high generation to overcharge, simultaneously along with the rising gradually of battery tension, charging current reduces gradually, thus the conversion realized from constant current charge to constant voltage charge.
When solar irradiation is not enough, solar energy electroplax (also claiming electricity sun energy battery or solar energy photovoltaic panel) cannot provide enough Energy transmission, voltage then between positive and negative charging bus 5 and 6 is dragged down by storage battery, during output voltage (voltage of amplifier U9B forward end) lower than the first reference voltage circuit 13 of the output voltage (voltage of amplifier U9B backward end) of charging voltage sample circuit 11, amplifier U9B exports high level, and diode D21 ends; Meanwhile, at this moment charging current very little (if now having the charging current being greater than steady state value to run counter to law of conservation of energy), the backward end voltage of amplifier U9A is less than forward end voltage, amplifier U9A exports high level, diode D20 ends, and like this, optocoupler U19 ends.Like this, if do not have electroplax voltage sampling circuit 22, Voltage Feedback compares circuit 20 and the 3rd reference voltage circuit 19 and the photoelectric isolating circuit 21 as reverse driving circuit, whole charging device no-output, causes the waste of solar cell energy.
This charging device is when illumination deficiency (as the cloudy day), during output voltage (the forward end voltage of amplifier U18B) lower than the 3rd reference voltage circuit 19 of the output voltage (the backward end voltage of amplifier U18B) of electroplax voltage sampling circuit 22, amplifier U18B exports high level, optocoupler U20 conducting, charging control circuit 1 is by trigger switch metal-oxide-semiconductor Q2, make metal-oxide-semiconductor Q2 conducting, storage battery is charged, thus improve the utilization ratio of solar cell.
Claims (8)
1. based on the charging device of solar energy electroplax, comprise: charging control circuit, just, negative charging output and with just, negative charging output correspondence is just being connected, negative charging bus and with solar energy electroplax just, negative pole correspondence is just being connected, negative electricity plate bus, positive electroplax bus is connected with the bus that just charges, just, the charging control power supply that promising charging control circuit is powered is set between negative electricity plate bus, it is characterized in that: between described negative charging bus and negative electricity plate bus, be provided with the charge switch circuit and On current sample circuit that are cascaded, the output of On current sample circuit is connected with the sampling end of charging control circuit, the control end of charge switch circuit is connected with the output of charging control circuit, positive electroplax bus and negative charging are provided with charging voltage sample circuit between bus or/and the negative bus and bear to charge between output and be provided with charge current sample circuit of charging, electroplax voltage sampling circuit is provided with between positive electroplax bus and negative electricity plate bus, positive electroplax bus and negative charge with being also provided with to charge between bus detect power supply, charging voltage sample circuit is connected with the feed side of charging control circuit by charging feedback circuit with charge current sample circuit, electroplax voltage sampling circuit is connected with the feed side of charging control circuit by electroplax feedback circuit.
2. charging device as claimed in claim 1, it is characterized in that: described charging feedback circuit comprise being arranged on charging detect power supply just, the first reference voltage circuit between negative output terminal, second reference voltage circuit and current feedback comparison circuit, Voltage Feedback compares circuit and photoelectric isolating circuit, first reference voltage circuit is higher than the output voltage of the second reference voltage circuit, the input of current feedback comparison circuit respectively with the output of the second reference voltage circuit, the output of charge current sample circuit is connected, the input that Voltage Feedback compares circuit respectively with the output of the first reference voltage circuit, the output of charging voltage sample circuit is connected, the output of current feedback comparison circuit, the input of output and photoelectric isolating circuit that Voltage Feedback compares circuit is connected, the output of photoelectric isolating circuit is connected with the feed side of described charging control circuit, described electroplax feedback circuit comprises the 3rd reference voltage circuit, the Voltage Feedback be arranged between positive and negative output that charging controls power supply and compares circuit and reverse driving circuit, the input that Voltage Feedback compares circuit is connected with the output of described electroplax voltage sampling circuit with the output of the 3rd reference voltage circuit respectively, the input of output and reverse driving circuit that Voltage Feedback compares circuit is connected, and the output of reverse driving circuit is connected with the feed side of charging control circuit.
3. charging device as claimed in claim 2, is characterized in that: described reverse driving circuit is photoelectric isolating circuit.
4. charging device as claimed in claim 2, is characterized in that: in described charging feedback circuit, Voltage Feedback compare be respectively arranged with between the respective output of circuit and current feedback comparison circuit and the feed side of charging control circuit unidirectional to circuit.
5. charging device as claimed in claim 1, is characterized in that: be provided with freewheeling circuit between described charge switch circuit and positive electroplax bus, and negative charging bus is provided with accumulator between charge switch circuit and charge current sample circuit.
6. charging device as claimed in claim 1, is characterized in that: described positive electroplax bus is connected with the bus that just charges to circuit by unidirectional.
7. the charging device as described in one of claim 1 to 6, is characterized in that: described charge current sample circuit is also connected to clamp circuit.
8. charging device as claimed in claim 7, is characterized in that: described be unidirectionally diode to circuit, clamp circuit, and described charge switch circuit is 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 |
|---|---|
| CN102790420A CN102790420A (en) | 2012-11-21 |
| CN102790420B true 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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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104983116A (en) * | 2015-05-29 | 2015-10-21 | 深圳市林央技术有限公司 | Solar energy purifying helmet |
Citations (1)
| 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 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| 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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Patent Citations (1)
| 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 |
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| CN102790420A (en) | 2012-11-21 |
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Granted publication date: 20141224 Termination date: 20180828 |