CN101976874A - Randomly expandable photovoltaic charge and discharge control device and control method - Google Patents
Randomly expandable photovoltaic charge and discharge control device and control method Download PDFInfo
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- CN101976874A CN101976874A CN2010105347570A CN201010534757A CN101976874A CN 101976874 A CN101976874 A CN 101976874A CN 2010105347570 A CN2010105347570 A CN 2010105347570A CN 201010534757 A CN201010534757 A CN 201010534757A CN 101976874 A CN101976874 A CN 101976874A
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Abstract
The invention discloses a randomly expandable photovoltaic charge and discharge control device and a control method. The device comprises a solar module, a storage battery, a first relay and a second relay for capacity expansion and a detection control circuit for driving the first relay and the second relay. The output of the solar module is connected with the input of the storage battery through the first relay, while the output of the storage battery is connected with the input of a load through the second relay. The detection control circuit is provided with two output ends and a voltage detection port. The two output ends are respectively connected with the input ends of coils of the first relay and the second relay. The voltage detection port of the detection control circuit is connected with the output of the storage battery. The device not only realizes the effective control of storage battery charge and discharge, but also reaches the goal of random expansion, and has the characteristics of simple control, high sensitivity, reliable operation and the like.
Description
Technical field
The present invention relates to photovoltaic and discharge and recharge the field, it is simple, sensitive particularly to relate to a kind of control, arbitrarily the photovoltaic charge-discharge controller and the control method thereof of dilatation.
Background technology
At present; in photovoltaic system; generally need between solar module, storage battery and load, install a charging-discharging controller additional; make the output of solar module connect the input of storage battery by charging-discharging controller; the output that makes storage battery connects the input of load by charging-discharging controller, thereby the protection storage battery avoids being overcharged and the influence of overdischarge.Yet the charging-discharging controller of prior art exists mostly but that control precision is limited, circuit is complicated, to shortcoming such as the protection of storage battery is not in place.Especially, the charging-discharging controller of prior art will realize that dilatation is also pretty troublesome, in actual mechanical process, or all more changes original controller basically, or increases the quantity of controller, and this just causes the cost that increases many.Thereby, realize that the difficulty of local dilatation is bigger, be unfavorable for photovoltaic system according to opportunity difference or customer requirements upgrade or dilatation.
Summary of the invention
The objective of the invention is to overcome the deficiency of prior art; a kind of photovoltaic charge-discharge controller and control method thereof of arbitrarily dilatation are provided; adopt relay and corresponding control circuit to control; effective control and protection have not only been realized to accumulator cell charging and discharging; and reached the purpose of random dilatation, thereby overcome the existing weak point of charging-discharging controller of prior art.
The technical solution adopted for the present invention to solve the technical problems is: a kind of photovoltaic charge-discharge controller of arbitrarily dilatation comprises solar module, storage battery; Also comprise first relay, second relay that can be used for dilatation and be used to drive first relay and detection control circuit that second relay carries out work; The output of solar module is connected with the input of storage battery by first relay; The output of storage battery is connected with the input of load by second relay; Detect control circuit and be provided with two outputs and a voltage detecting port, this two output is connected with the input of first relay with the coil of second relay respectively, and the voltage detecting port that detects control circuit is connected with the output of storage battery.
Described detection control circuit comprises voltage detecting circuit, first drive circuit and second drive circuit; The output of this voltage detecting circuit is connected with the input of first drive circuit with second drive circuit respectively, the output of first drive circuit and second drive circuit is respectively two outputs of described detection control circuit, the output of this first drive circuit connects the input of the coil of described first relay, and the output of this second drive circuit connects the input of the coil of described second relay; The input of voltage detecting circuit constitutes the voltage detecting port of described detection control circuit, and the input of this voltage detecting circuit connects the output of described storage battery.
Described voltage detecting circuit comprises control chip, first resistance, second resistance, the 3rd resistance, the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance, the 8th resistance, first electric capacity and voltage stabilizing didoe, this control chip is provided with 14 pins, the 12nd pin of this control chip is an output of described voltage detecting circuit, and the 12nd pin connects the input of described first drive circuit; The 11st pin of control chip is another output of described voltage detecting circuit, and the 11st pin connects the input of described second drive circuit; The 2nd pin of control chip is the input of described voltage detecting circuit; The 2nd pin of control chip is connected with the positive pole of described storage battery by first resistance; One end of second resistance, the 3rd resistance, the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance is corresponding respectively to be connected with the 2nd pin, the 4th pin, the 8th pin, the 7th pin, the 6th pin, the 5th pin of control chip, and the other end of second resistance, the 3rd resistance, the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance is ground connection respectively; The 14th pin of control chip is the power supply positive input terminal of this control chip, and the 14th pin of this control chip is connected with the positive pole of described storage battery by the 8th resistance; The 1st pin of described control chip is the power-input of this control chip, the 1st pin ground connection of this control chip; First electric capacity and voltage stabilizing didoe are connected in parallel between the 14th pin and the 1st pin of control chip.
Described first drive circuit comprises the 9th resistance, first triode and second electric capacity; The 12nd pin of described control chip connects the base stage of first triode by the 9th resistance; The grounded emitter of first triode, the collector electrode of first triode connects an end of the coil input of described first relay, the positive pole of the described storage battery of another termination of the coil input of described first relay, second electric capacity is connected between the coil input end of described first relay; The moving contact of described first relay connects the positive pole of storage battery, and the normally-closed contact of described first relay connects the positive pole of solar module; The minus earth of described solar module.
Described second drive circuit comprises the tenth resistance, second triode and the 3rd electric capacity; The 11st pin of described control chip connects the base stage of second triode by the tenth resistance; The grounded emitter of second triode, the collector electrode of second triode connects an end of the coil input of described second relay, the positive pole of the described storage battery of another termination of the coil input of described second relay, the 3rd electric capacity is connected between the coil input end of described second relay; The moving contact of described second relay connects the positive pole of described storage battery, and the normally-closed contact of described second relay connects the positive pole of load; The equal ground connection of the negative pole of described storage battery and load.
Further, also comprise an alarm control circuit; This alarm control circuit comprises the 3rd relay, the 3rd triode, the 11 resistance and the 4th electric capacity; The 10th pin of described control chip is an output, and the 10th pin of this control chip is connected by the base stage of the 11 resistance with the 3rd triode; The collector electrode of the 3rd triode connects an end of the coil input of the 3rd relay; The positive pole of the described storage battery of another termination of the coil input of the 3rd relay; The 4th electric capacity is connected between the coil input end of the 3rd relay; The moving contact of the 3rd relay connects a control end of a warning device, and the normally opened contact of the 3rd relay connects another control end of this warning device.
A kind of control method of photovoltaic charge-discharge controller of arbitrarily dilatation, this control device comprise first relay, second relay of arbitrarily dilatation and are used to drive first relay and detection control circuit that second relay carries out work; First relay is connected between solar module and the storage battery, and second relay is connected between storage battery and the load; Detect control circuit and be provided with two outputs and a voltage detecting port, this two output is connected with the input of first relay with the coil of second relay respectively, and the voltage detecting port that detects control circuit is connected with the output of storage battery; It comprises following controlled step:
A. the voltage detecting port that detects control circuit detects the voltage of storage battery in real time, and whether open circuit voltage or storage battery that whether the voltage of judging storage battery is higher than storage battery are in overvoltage condition;
B. if being higher than the open circuit voltage or the storage battery of storage battery, the voltage of storage battery is in overvoltage condition, then detect two outputs of control circuit and export control signal respectively, first relay and second relay disconnect its moving contact and normally-closed contact respectively under the driving of corresponding control signal, solar module is not charged to storage battery, close load simultaneously; Otherwise the moving contact of first relay and second relay and normally-closed contact keep attracting state respectively;
C. if the detection control circuit detects storage battery to be in when putting state, detect control circuit to second relay output control signal, second relay disconnects its moving contact and normally-closed contact under the driving of control signal, load is closed; The moving contact of first relay and normally-closed contact keep attracting state, and solar module is charged to storage battery.
The detection control circuit that is adopted comprises voltage detecting circuit, first drive circuit and second drive circuit; In the described steps A, be to detect by the voltage of voltage detecting circuit to storage battery; Among described step B and the C, be by voltage detecting circuit respectively to first drive circuit and second drive circuit output control signal, make first drive circuit and second drive circuit drive respectively that first relay and second relay move.
The voltage detecting circuit that is adopted is output as may command time-delay output, and among the described step B, if storage battery is in overvoltage condition, then voltage detecting circuit makes the first relay deferred action to first drive circuit time-delay output control signal; Among the described step C, if storage battery was in the state of putting, then voltage detecting circuit makes the second relay deferred action to second drive circuit time-delay output control signal.
Further, also adopt an alarm control circuit, this alarm control circuit comprises one the 3rd relay; Described detection control circuit also is provided with an output, and this output is connected with a warning device by the 3rd relay; Among the described step C,, then, make the 3rd relay connect warning device, output alarm signal in advance to the 3rd relay output control signal if voltage detecting circuit detects storage battery and is about to be in the state of putting.
The invention has the beneficial effects as follows, owing to comprise first relay of arbitrarily dilatation, second relay and the detection control circuit that is used to control first relay and second actuating of relay, and first relay is connected between solar module and the storage battery, second relay is connected between storage battery and the load, the output that detects control circuit is connected with the input of first relay with the coil of second relay respectively, detect control circuit and be provided with a voltage detecting port, this voltage detecting port is connected with the output of storage battery, make that detecting control circuit can detect in real time to the voltage of storage battery, and be at storage battery and overcharge or during overvoltage condition, the output control signal, first relay and second relay are moved respectively and close solar module and load, be in when putting state at storage battery, make second actuating of relay and close load, solar module keeps charged state to storage battery simultaneously.Thereby the present invention has that control is simple, control is highly sensitive, reliable, can improve the characteristics in the useful life of storage battery greatly.In addition, because first relay that connects in the circuit can further carry out dilatation respectively with second relay and be connected, thereby this control device compared with prior art, need not more to change the The whole control device, also need not to increase the quantity of control device, and only need change the capacity of relay, can reach the purpose of random dilatation, and therefrom save great amount of cost.
Below in conjunction with drawings and Examples the present invention is described in further detail; But the photovoltaic charge-discharge controller and the control method thereof of a kind of arbitrarily dilatation of the present invention are not limited to embodiment.
Description of drawings
Fig. 1 is a theory diagram of the present invention;
Fig. 2 is a circuit connection diagram of the present invention;
Fig. 3 is the theory diagram after the dilatation of the present invention;
Fig. 4 is the circuit connection diagram after the dilatation of the present invention.
Embodiment
Embodiment one, see also shown in Figure 1, the photovoltaic charge-discharge controller of a kind of arbitrarily dilatation of the present invention comprises solar module 1, storage battery 4, can be used for first relay 2, second relay 5 of dilatation and is used to drive first relay 2 and detection control circuit 3 that second relay 5 carries out work; The output of solar module 1 is connected with the input of storage battery 4 by first relay 2; The output of storage battery 4 is connected with the input of load 6 by second relay 5; Detect control circuit 3 and be provided with two outputs and a voltage detecting port, this two output is connected with the input of first relay 2 and the coil of second relay 5 respectively, and the voltage detecting port that detects control circuit 3 is connected with the output of storage battery 4.
Wherein,
Described detection control circuit 3 comprises voltage detecting circuit, first drive circuit and second drive circuit; The output of this voltage detecting circuit is connected with the input of first drive circuit with second drive circuit respectively, the output of first drive circuit and second drive circuit is respectively two outputs of described detection control circuit 3, the output of this first drive circuit connects the input of the coil of described first relay 2, and the output of this second drive circuit connects the input of the coil of described second relay 5; The input of voltage detecting circuit constitutes the voltage detecting port of described detection control circuit 3, and the input of this voltage detecting circuit connects the output of described storage battery 4;
See also shown in Figure 2, described voltage detecting circuit comprises control chip IC1, first resistance R 1, second resistance R 2, the 3rd resistance R 3, the 4th resistance R 4, the 5th resistance R 5, the 6th resistance R 6, the 7th resistance R 7, the 8th resistance R 8, first capacitor C 1 and voltage stabilizing didoe D1, this control chip IC1 is provided with 14 pins, the 12nd pin of this control chip IC1 is an output of described voltage detecting circuit, and the 12nd pin connects the input of described first drive circuit; The 11st pin of control chip IC1 is another output of described voltage detecting circuit, and the 11st pin connects the input of described second drive circuit; The 2nd pin of control chip IC1 is the input of described voltage detecting circuit; The 2nd pin of control chip IC1 is connected with the positive pole of described storage battery by first resistance R 1; One end of second resistance R 2, the 3rd resistance R 3, the 4th resistance R 4, the 5th resistance R 5, the 6th resistance R 6, the 7th resistance R 7 is corresponding respectively to be connected with the 2nd pin, the 4th pin, the 8th pin, the 7th pin, the 6th pin, the 5th pin of control chip IC1, and the other end of second resistance R 2, the 3rd resistance R 3, the 4th resistance R 4, the 5th resistance R 5, the 6th resistance R 6, the 7th resistance R 7 is ground connection respectively; The 14th pin of control chip IC1 is the power supply positive input terminal of this control chip, and the 14th pin of this control chip IC1 is connected with the positive pole of described storage battery by the 8th resistance R 8; The 1st pin of described control chip IC1 is the power-input of this control chip, the 1st pin ground connection of this control chip IC1; First capacitor C 1 and voltage stabilizing didoe D1 are connected in parallel between the 14th pin and the 1st pin of control chip IC1;
Described first drive circuit comprises the 9th resistance R 9, the first triode BG1 and second capacitor C 2; The 12nd pin of described control chip IC1 connects the base stage of the first triode BG1 by the 9th resistance R 9; The grounded emitter of the first triode BG1, the collector electrode of the first triode BG1 connects an end of the coil input of the described first relay J K1, the positive pole of the described storage battery of another termination of the coil input of the described first relay J K1, second capacitor C 2 is connected between the coil input end of the described first relay J K1; The moving contact of the described first relay J K1 connects the positive pole of storage battery, and the normally-closed contact of the described first relay J K1 connects the positive pole of solar module; The minus earth GND of described solar module;
Described second drive circuit comprises the tenth resistance R 10, the second triode BG2 and the 3rd capacitor C 3; The 11st pin of described control chip IC1 connects the base stage of the second triode BG2 by the tenth resistance R 10; The grounded emitter GND of the second triode BG2, the collector electrode of the second triode BG2 connects an end of the coil input of the described second relay J K2, the positive pole of the described storage battery of another termination of the coil input of the described second relay J K2, the 3rd capacitor C 3 is connected between the coil input end of the described second relay J K2; The moving contact of the described second relay J K2 connects the positive pole of described storage battery, and the normally-closed contact of the described second relay J K2 connects the positive pole of load; The equal ground connection GND of the negative pole of described storage battery and load;
Further, also comprise an alarm control circuit; This alarm control circuit comprises the 3rd relay J K3, the 3rd triode BG3, the 11 resistance R 11 and the 4th capacitor C 4; The 10th pin of described control chip IC1 is an output, and the 10th pin of this control chip IC1 is connected with the base stage of the 3rd triode BG3 by the 11 resistance R 11; The grounded emitter GND of the 3rd triode BG3, the collector electrode of the 3rd triode BG3 connects an end of the coil input of the 3rd relay J K3; The positive pole of the described storage battery of another termination of the coil input of the 3rd relay J K3; The 4th capacitor C 4 is connected between the coil input end of the 3rd relay J K3; The moving contact of the 3rd relay J K3 connects a control end of a warning device, and the normally opened contact of the 3rd relay J K3 connects another control end of this warning device.
The photovoltaic charge-discharge controller of a kind of arbitrarily dilatation of the present invention, the 12nd pin of its control chip IC1 and the 11st pin are may command time-delay output, this control chip IC1 can realize the accurate detection of this control chip to the electrical voltage point of storage battery by fine setting the 4th resistance R 4, the 5th resistance R 5, the 6th resistance R 6 and the 7th resistance R 7.Here, the open circuit voltage of supposing storage battery is 68 volts, the overvoltage point voltage is 66 volts, crossing and putting point voltage is 42 volts, then finely tuning the 4th resistance R 4 can make the voltage of control chip IC1 detection be accurate to 68 volts, finely tune the 5th resistance R 5 voltage of control chip IC1 detection is accurate between the 66-57 volt, finely tune the 6th resistance R 6 and can make the voltage of control chip IC1 detection be accurate to 43 volts, finely tune the 7th resistance R 7 voltage of control chip IC1 detection is accurate between the 42-47 volt.
This is the control method of the photovoltaic charge-discharge controller of dilatation arbitrarily, comprises following controlled step:
S1. the 2nd pin of control chip IC1 detects the voltage of storage battery in real time, and judges whether the voltage of storage battery is higher than the open circuit voltage of storage battery (68 volts) or whether storage battery is in overvoltage condition (being higher than 66 volts);
S2. if the voltage of storage battery is higher than 57 volts during less than 68 volts, then two outputs of control chip IC1 are delayed time respectively and were exported control signal in 1 minute, the first relay J K1 and the second relay J K2 disconnect its moving contact and normally-closed contact respectively under the driving of corresponding control signal, solar module is not charged to storage battery, close load simultaneously; Otherwise the moving contact of first relay and second relay and normally-closed contact keep attracting state respectively;
S3. if detecting the voltage of storage battery, control chip IC1 reaches 68 volts, then export control signal at once, pressure makes the first relay J K1 and the second relay J K2 disconnect its moving contact and normally-closed contact respectively, thereby solar module is not charged to storage battery, closes load simultaneously;
S4. it is 43 volts if control chip IC1 detects the voltage of storage battery, then, make moving contact and the normally opened contact adhesive of the 3rd relay J K3, thereby connect warning device to alarm control circuit output control signal, output alarm signal will enter the state of putting to inform user's storage battery in advance;
S5. it is 42 volts if control chip IC2 detects the voltage of storage battery, then delay time 30 seconds to second relay J K2 output control signal, make the second relay J K2 disconnect its moving contact and normally-closed contact, the moving contact of the first relay J K1 and normally-closed contact keep attracting state simultaneously, so that solar module can charge to storage battery.
The photovoltaic charge-discharge controller and the control method thereof of a kind of arbitrarily dilatation of the present invention, solar module is connect the normally-closed contact of the first relay J K1, make load connect the normally-closed contact of the second relay J K2, solar module and the voltage that loads on storage battery just often all can be worked, and only be in open circuit voltage or overvoltage or cross the state of putting at storage battery, just can under the action of the first relay J K1 and the second relay J K2, take corresponding action.The output of control chip IC1 is set to may command time-delay output, can avoid circuit oscillatory occurences to occur, thereby further protect storage battery.
Embodiment two, see also shown in Figure 3ly, and the difference of itself and embodiment one is: carry out dilatation on the basis of first relay 2 and second relay 5, increased charge relay 7 and discharge relay 8; Wherein charge relay 7 is that first relay 2 is carried out dilatation, and discharge relay 8 is that second relay 5 is carried out dilatation; The output of solar module 1 connects the input of storage battery 4 by charge relay 7, and the output of storage battery 4 connects the input of load by discharge relay 8.
See also shown in Figure 2ly, the difference of Fig. 2 is among itself and the embodiment one: the normally-closed contact that the normally-closed contact of the first relay J K1 meets described charge relay 7, the second relay J K2 connects described discharge relay 8; Solar module is connected with storage battery by charge relay 7, and load is connected with storage battery by discharge relay 7; Also be connected with a diode D2 at the positive pole place of storage battery, the access of this diode D2 can prevent that storage battery from polarity occurring and connecing anti-situation in connection procedure.
In sum, the photovoltaic charge-discharge controller and the control method thereof of a kind of arbitrarily dilatation of the present invention, not only can control effectively, and have control characteristics such as simple, reliable, and can reach the purpose of random dilatation the charging and discharging of accumulator situation.
The foregoing description only is used for further specifying the photovoltaic charge-discharge controller and the control method thereof of a kind of arbitrarily dilatation of the present invention; but the present invention is not limited to embodiment; every foundation technical spirit of the present invention all falls in the protection range of technical solution of the present invention any simple modification, equivalent variations and modification that above embodiment did.
Claims (10)
1. the random photovoltaic charge-discharge controller of dilatation comprises solar module, storage battery; It is characterized in that: also comprise first relay, second relay that can be used for dilatation and be used to drive first relay and detection control circuit that second relay carries out work; The output of solar module is connected with the input of storage battery by first relay; The output of storage battery is connected with the input of load by second relay; Detect control circuit and be provided with two outputs and a voltage detecting port, this two output is connected with the input of first relay with the coil of second relay respectively, and the voltage detecting port that detects control circuit is connected with the output of storage battery.
2. the photovoltaic charge-discharge controller of arbitrarily dilatation according to claim 1 is characterized in that: described detection control circuit comprises voltage detecting circuit, first drive circuit and second drive circuit; The output of this voltage detecting circuit is connected with the input of first drive circuit with second drive circuit respectively, the output of first drive circuit and second drive circuit is respectively two outputs of described detection control circuit, the output of this first drive circuit connects the input of the coil of described first relay, and the output of this second drive circuit connects the input of the coil of described second relay; The input of voltage detecting circuit constitutes the voltage detecting port of described detection control circuit, and the input of this voltage detecting circuit connects the output of described storage battery.
3. the photovoltaic charge-discharge controller of arbitrarily dilatation according to claim 2, it is characterized in that: described voltage detecting circuit comprises control chip, first resistance, second resistance, the 3rd resistance, the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance, the 8th resistance, first electric capacity and voltage stabilizing didoe, this control chip is provided with 14 pins, the 12nd pin of this control chip is an output of described voltage detecting circuit, and the 12nd pin connects the input of described first drive circuit; The 11st pin of control chip is another output of described voltage detecting circuit, and the 11st pin connects the input of described second drive circuit; The 2nd pin of control chip is the input of described voltage detecting circuit; The 2nd pin of control chip is connected with the positive pole of described storage battery by first resistance; One end of second resistance, the 3rd resistance, the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance is corresponding respectively to be connected with the 2nd pin, the 4th pin, the 8th pin, the 7th pin, the 6th pin, the 5th pin of control chip, and the other end of second resistance, the 3rd resistance, the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance is ground connection respectively; The 14th pin of control chip is the power supply positive input terminal of this control chip, and the 14th pin of this control chip is connected with the positive pole of described storage battery by the 8th resistance; The 1st pin of described control chip is the power-input of this control chip, the 1st pin ground connection of this control chip; First electric capacity and voltage stabilizing didoe are connected in parallel between the 14th pin and the 1st pin of control chip.
4. the photovoltaic charge-discharge controller of arbitrarily dilatation according to claim 3 is characterized in that: described first drive circuit comprises the 9th resistance, first triode and second electric capacity; The 12nd pin of described control chip connects the base stage of first triode by the 9th resistance; The grounded emitter of first triode, the collector electrode of first triode connects an end of the coil input of described first relay, the positive pole of the described storage battery of another termination of the coil input of described first relay, second electric capacity is connected between the coil input end of described first relay; The moving contact of described first relay connects the positive pole of storage battery, and the normally-closed contact of described first relay connects the positive pole of solar module; The minus earth of described solar module.
5. the photovoltaic charge-discharge controller of arbitrarily dilatation according to claim 3 is characterized in that: described second drive circuit comprises the tenth resistance, second triode and the 3rd electric capacity; The 11st pin of described control chip connects the base stage of second triode by the tenth resistance; The grounded emitter of second triode, the collector electrode of second triode connects an end of the coil input of described second relay, the positive pole of the described storage battery of another termination of the coil input of described second relay, the 3rd electric capacity is connected between the coil input end of described second relay; The moving contact of described second relay connects the positive pole of described storage battery, and the normally-closed contact of described second relay connects the positive pole of load; The equal ground connection of the negative pole of described storage battery and load.
6. the photovoltaic charge-discharge controller of arbitrarily dilatation according to claim 3 is characterized in that: further, also comprise an alarm control circuit; This alarm control circuit comprises the 3rd relay, the 3rd triode, the 11 resistance and the 4th electric capacity; The 10th pin of described control chip is an output, and the 10th pin of this control chip is connected by the base stage of the 11 resistance with the 3rd triode; The grounded emitter of the 3rd triode, the collector electrode of the 3rd triode connect an end of the coil input of the 3rd relay; The positive pole of the described storage battery of another termination of the coil input of the 3rd relay; The 4th electric capacity is connected between two coil input ends of the 3rd relay; The moving contact of the 3rd relay connects a control end of a warning device, and the normally opened contact of the 3rd relay connects another control end of this warning device.
7. random control method of the photovoltaic charge-discharge controller of dilatation is characterized in that: this control device comprises first relay, second relay of arbitrarily dilatation and is used to drive first relay and detection control circuit that second relay carries out work; First relay is connected between solar module and the storage battery, and second relay is connected between storage battery and the load; Detect control circuit and be provided with two outputs and a voltage detecting port, this two output is connected with the input of first relay with the coil of second relay respectively, and the voltage detecting port that detects control circuit is connected with the output of storage battery; It comprises following controlled step:
A. the voltage detecting port that detects control circuit detects the voltage of storage battery in real time, and whether open circuit voltage or storage battery that whether the voltage of judging storage battery is higher than storage battery are in overvoltage condition;
B. if being higher than the open circuit voltage or the storage battery of storage battery, the voltage of storage battery is in overvoltage condition, then detect two outputs of control circuit and export control signal respectively, first relay and second relay disconnect its moving contact and normally-closed contact respectively under the driving of corresponding control signal, solar module is not charged to storage battery, close load simultaneously; Otherwise the moving contact of first relay and second relay and normally-closed contact keep attracting state respectively;
C. if the detection control circuit detects storage battery to be in when putting state, detect control circuit to second relay output control signal, second relay disconnects its moving contact and normally-closed contact under the driving of control signal, load is closed; The moving contact of first relay and normally-closed contact keep attracting state, and solar module is charged to storage battery.
8. the control method of the photovoltaic charge-discharge controller of arbitrarily dilatation according to claim 7 is characterized in that: the detection control circuit that is adopted comprises voltage detecting circuit, first drive circuit and second drive circuit; In the described steps A, be to detect by the voltage of voltage detecting circuit to storage battery; Among described step B and the C, be by voltage detecting circuit respectively to first drive circuit and second drive circuit output control signal, make first drive circuit and second drive circuit drive respectively that first relay and second relay move.
9. the control method of the photovoltaic charge-discharge controller of arbitrarily dilatation according to claim 8, it is characterized in that: the voltage detecting circuit that is adopted is output as may command time-delay output, among the described step B, if storage battery is in overvoltage condition, then voltage detecting circuit makes the first relay deferred action to first drive circuit time-delay output control signal; Among the described step C, if storage battery was in the state of putting, then voltage detecting circuit makes the second relay deferred action to second drive circuit time-delay output control signal.
10. the control method of the photovoltaic charge-discharge controller of arbitrarily dilatation according to claim 7 is characterized in that: further, also adopt an alarm control circuit, this alarm control circuit comprises one the 3rd relay; Described detection control circuit also is provided with an output, and this output is connected with a warning device by the 3rd relay; Among the described step C,, then, make the 3rd relay connect warning device, output alarm signal in advance to the 3rd relay output control signal if voltage detecting circuit detects storage battery and is about to be in the state of putting.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104319854A (en) * | 2014-11-18 | 2015-01-28 | 内蒙古科技大学 | Electric bicycle independent photovoltaic charging device and charging method thereof |
| CN110556970A (en) * | 2019-08-20 | 2019-12-10 | 朔黄铁路发展有限责任公司 | charging and discharging control circuit, power generation and supply control system and electric locomotive |
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| CN101026313A (en) * | 2007-03-20 | 2007-08-29 | 南开大学 | Multifunctional intelligent solar lamp controller |
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| CN104319854A (en) * | 2014-11-18 | 2015-01-28 | 内蒙古科技大学 | Electric bicycle independent photovoltaic charging device and charging method thereof |
| CN110556970A (en) * | 2019-08-20 | 2019-12-10 | 朔黄铁路发展有限责任公司 | charging and discharging control circuit, power generation and supply control system and electric locomotive |
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