Solar power generation voltage regulation circuit

Abstract

The utility model discloses a solar power generation voltage regulation circuit, which relates to the technical field of solar energy regulation, and comprises a photovoltaic power generation module used for photoelectric conversion; the voltage stabilization adjusting module is used for adjusting the output voltage according to the magnitude of the feedback signal; the differential detection module is used for performing voltage division detection and differential processing on the electric energy output by the photovoltaic power generation module; the feedback module is used for providing a feedback signal; the output module is used for being connected with electric equipment; and the output detection module is used for detecting the connection state of the output module and the electric equipment, and when the output module is not connected with the electric equipment, the signal control module adjusts the voltage value of the feedback signal and controls the energy storage control module to carry out energy storage work. The solar power generation voltage regulating circuit can provide voltage stabilization for electric equipment, improves power supply safety and power supply efficiency, can timely regulate charging current of the energy storage control module according to power generation conditions of the photovoltaic power generation module, and improves charging efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of solar energy regulation, in particular to a solar power generation voltage regulation circuit. Background Art

[0002] With the depletion of non-renewable resources such as coal and oil, solar energy, an emerging renewable energy source, has received widespread attention and application. However, due to weather reasons, the power of solar power generation varies. Most of the existing solar energy uses DC-DC voltage regulators to maintain a stable power supply state when supplying power to electrical equipment to avoid damage to electrical equipment caused by unstable voltage. However, when controlling the charging of batteries, the charging current of the batteries cannot be adjusted in time according to the solar power generation state, resulting in a decrease in the charging efficiency of the batteries. Therefore, there is room for improvement. Utility Model Content

[0003] The embodiment of the utility model provides a solar power generation voltage regulating circuit to solve the problems raised in the above background technology.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A solar power generation voltage regulation circuit comprises: a photovoltaic power generation module, a voltage stabilization and regulation module, a differential detection module, a signal control module, a feedback module, an output module, an output detection module and an energy storage control module;

[0006] A photovoltaic power generation module, used for performing photoelectric conversion and outputting first electrical energy;

[0007] A voltage stabilization and regulation module, connected to the photovoltaic power generation module and the feedback module, and configured to receive a feedback signal output by the feedback module and perform voltage stabilization and regulation processing on the first electric energy;

[0008] A differential detection module, connected to the photovoltaic power generation module, for performing voltage division detection on the first electric energy and outputting a first detection signal, for setting a reference threshold and performing differential processing between the first detection signal and the reference threshold, and for outputting a first differential signal;

[0009] a signal control module, connected to the differential detection module, the output detection module and the feedback module, and configured to receive the first control signal output by the output detection module and transmit the first differential signal to the feedback module;

[0010] A feedback module, used for performing voltage division processing on the electric energy output by the voltage regulating module and providing a feedback signal to the voltage regulating module, and used for receiving the first differential signal and adjusting the voltage value of the feedback signal and adjusting the voltage output by the voltage regulating module;

[0011] An output module, connected to the voltage stabilizing and regulating module, used to connect to an electrical device and receive the electrical energy output by the voltage stabilizing and regulating module;

[0012] an output detection module, connected to the output module, for detecting a connection state between the output module and the electric device, and outputting a first control signal when the output module is not connected to the electric device;

[0013] The energy storage control module is connected to the voltage stabilizing and regulating module and the output detection module, and is used to receive the first control signal and store the electric energy output by the voltage stabilizing and regulating module.

[0014] As a further solution of the utility model: the photovoltaic power generation module includes a photovoltaic panel and a first capacitor; the voltage regulation module includes a sixth resistor, a fifth resistor, a third capacitor, a fourth capacitor, a first voltage regulator, a fifth capacitor, a first inductor, a sixth capacitor and a second diode; the output module includes an output port;

[0015] Preferably, the first end of the photovoltaic panel is connected to one end of the first capacitor and the second end of the first voltage regulator and is connected to the seventh end of the first voltage regulator through a sixth resistor, the eighth end of the first voltage regulator is connected to the other end of the first capacitor, one end of the third capacitor, the second end of the photovoltaic panel, the fourth end of the first voltage regulator and the ground through a fourth capacitor, the other end of the third capacitor is connected to the sixth end of the first voltage regulator through a fifth resistor, the first end of the first voltage regulator is connected to the third end of the first voltage regulator and one end of the first inductor through a fifth capacitor, the other end of the first inductor is connected to the anode of the second diode and is grounded through a sixth capacitor, the cathode of the second capacitor is connected to the first end of the output port, and the second end of the output port is connected to the output detection module.

[0016] As a further solution of the utility model: the differential detection module includes a first resistor, a first diode, a second resistor, a third resistor, a second capacitor, a fourth resistor, an eighth resistor and a first operational amplifier;

[0017] Preferably, the in-phase end of the first operational amplifier is connected to the cathode of the first diode and to the first end of the photovoltaic panel through the first resistor, the other end of the second resistor is connected to the inverting end of the first operational amplifier, one end of the second capacitor and one end of the fourth resistor and is grounded through the third resistor, the anode of the first diode is grounded, the output end of the first operational amplifier is connected to the other end of the second capacitor, the other end of the fourth resistor and the first end of the eighth resistor, and the second end of the eighth resistor is connected to the signal control module.

[0018] As a further solution of the utility model: the signal control module includes a third diode and a first analog switch; the feedback module includes a first potentiometer and a seventh resistor;

[0019] Preferably, one end of the first potentiometer and the slider end are connected to the cathode of the second diode, the other end of the first potentiometer is connected to the fifth end of the first voltage regulator and the cathode of the third diode and is grounded through the seventh resistor, the anode of the third diode is connected to the OUT end of the first analog switch, the CTRL end of the first analog switch is connected to the output detection module, and the IN end of the first analog switch is connected to the second end of the eighth resistor.

[0020] As a further solution of the utility model: the energy storage control module includes a first power tube and an energy storage device;

[0021] Preferably, the drain of the first power tube is connected to the cathode of the second diode, the source of the first power tube is connected to the first end of the energy storage device, the second end of the energy storage device is grounded, and the gate of the first power tube is connected to the output detection module.

[0022] As a further solution of the utility model: the output detection module includes a first power supply, a ninth resistor and a first optical coupler;

[0023] Preferably, the first power supply is connected to the third end of the first optocoupler, the gate of the first power tube and the CTRL end of the first analog switch through a ninth resistor, the first end of the first optocoupler is connected to the second end of the output port, the second end of the first optocoupler is grounded, and the fourth end of the first optocoupler is grounded.

[0024] Compared with the prior art, the beneficial effects of the utility model are as follows: the solar power generation voltage regulation circuit of the utility model performs voltage regulation processing on the electric energy output by the photovoltaic power generation module by the feedback signal output by the voltage regulation module in cooperation with the feedback module, so as to provide voltage regulation for the electric equipment connected to the output module, improve the power supply safety and power supply efficiency of the electric equipment, and the output detection module detects the connection status between the output module and the electric equipment. When the output module is not connected to the electric equipment, the energy storage control module is controlled to perform energy storage work, and at the same time, the differential detection module is controlled according to the power generation size of the photovoltaic power generation module, and the voltage value of the feedback signal provided by the feedback module is adjusted in cooperation with the signal control module. Then, when the power supply voltage of the photovoltaic power generation module is low, the voltage output by the voltage regulation module is reduced, and when the power supply voltage of the photovoltaic power generation module is boosted, the voltage output by the voltage regulation module is increased, and then the charging current of the energy storage control module is timely adjusted to improve the charging efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments of the utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0026] Figure 1The present invention provides a schematic block diagram of a solar power generation voltage regulation circuit.

[0027] Figure 2 A circuit diagram of a solar power generation voltage regulation circuit provided in an example of the utility model.

[0028] Figure 3 This is a connection circuit diagram of the output detection module provided by an example of the utility model. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] In one embodiment, see Figure 1 , a solar power generation voltage regulation circuit, comprising: a photovoltaic power generation module 1, a voltage regulation module 2, a differential detection module 3, a signal control module 4, a feedback module 5, an output module 6, an output detection module 7 and an energy storage control module 8;

[0031] Specifically, the photovoltaic power generation module 1 is used to perform photoelectric conversion and output the first electric energy;

[0032] A voltage stabilizing and regulating module 2, connected to the photovoltaic power generation module 1 and the feedback module 5, for receiving the feedback signal output by the feedback module 5 and performing voltage stabilizing and regulating processing on the first electric energy;

[0033] A differential detection module 3, connected to the photovoltaic power generation module 1, for performing voltage division detection on the first electric energy and outputting a first detection signal, for setting a reference threshold and performing differential processing between the first detection signal and the reference threshold, and for outputting a first differential signal;

[0034] A signal control module 4, connected to the differential detection module 3, the output detection module 7 and the feedback module 5, for receiving the first control signal output by the output detection module 7 and transmitting the first differential signal to the feedback module 5;

[0035] Feedback module 5, used for dividing the electric energy output by voltage stabilizing and regulating module 2 and providing feedback signal to voltage stabilizing and regulating module 2, used for receiving the first differential signal and adjusting the voltage value of the feedback signal and adjusting the voltage output by voltage stabilizing and regulating module 2;

[0036] An output module 6, connected to the voltage regulating module 2, used to connect to an electrical device and receive the electrical energy output by the voltage regulating module 2;

[0037] An output detection module 7, connected to the output module 6, for detecting the connection status between the output module 6 and the electric device, and outputting a first control signal when the output module 6 is not connected to the electric device;

[0038] The energy storage control module 8 is connected to the voltage stabilizing and regulating module 2 and the output detection module 7 , and is used to receive the first control signal and store the electric energy output by the voltage stabilizing and regulating module 2 .

[0039] In a specific embodiment, the photovoltaic power generation module 1 can use a photovoltaic power generation circuit composed of a photovoltaic panel and a capacitor to convert light energy into solar energy; the voltage regulation module 2 can use a voltage regulation circuit composed of a voltage stabilizer, a resistor, a capacitor, etc., and can adjust the output voltage according to the feedback signal fed back by the feedback module 5; the differential detection module 3 can use a differential detection circuit composed of a differential amplifier, a resistor, etc. to detect the size state of the output voltage of the photovoltaic power generation module 1; the signal control module 4 can use a signal control circuit composed of an analog switch and a diode to receive the signal output by the differential detection module 3 and transmit the signal to the feedback module 5; the feedback module 5 can use a feedback circuit composed of a potentiometer and a resistor to divide the electric energy output by the voltage regulation module 2 and provide a feedback signal to the voltage regulation module 2; the output module 6 can use an output circuit composed of an output port to connect to an electrical device; the output detection module 7 can use an output detection circuit composed of a photoelectric coupler, a resistor, etc. to detect the connection state of the output module 6 and the electrical device; the energy storage control module 8 can use an energy storage control circuit composed of an energy storage device and a power tube to perform energy storage.

[0040] In another embodiment, see Figure 1 , Figure 2 and Figure 3 , the photovoltaic power generation module 1 includes a photovoltaic panel and a first capacitor C1; the voltage regulation module 2 includes a sixth resistor R6, a fifth resistor R5, a third capacitor C3, a fourth capacitor C4, a first voltage regulator U1, a fifth capacitor C5, a first inductor L1, a sixth capacitor C6 and a second diode D2; the output module 6 includes an output port;

[0041] Specifically, the first end of the photovoltaic panel is connected to one end of the first capacitor C1 and the second end of the first voltage regulator U1 and is connected to the seventh end of the first voltage regulator U1 through the sixth resistor R6. The eighth end of the first voltage regulator U1 is connected to the other end of the first capacitor C1, one end of the third capacitor C3, the second end of the photovoltaic panel, the fourth end of the first voltage regulator U1 and the ground through the fourth capacitor C4. The other end of the third capacitor C3 is connected to the sixth end of the first voltage regulator U1 through the fifth resistor R5. The first end of the first voltage regulator U1 is connected to the third end of the first voltage regulator U1 and one end of the first inductor L1 through the fifth capacitor C5. The other end of the first inductor L1 is connected to the anode of the second diode D2 and is grounded through the sixth capacitor C6. The cathode of the second capacitor C2 is connected to the first end of the output port, and the second end of the output port is connected to the output detection module 7.

[0042] In a specific embodiment, the above-mentioned first voltage regulator U1 can select MP2307 chip, the first end of the first voltage regulator U1 is the bootstrap voltage end, the second end is the power supply voltage input end, the third end is the switching power supply output end, the fourth end is the ground end, the fifth end is the voltage feedback end, the sixth end is the compensation end, which is connected to the fifth resistor R5 and the third capacitor C3, the seventh end is the enable end, and the eighth end is the soft start control input end, which is connected to the fourth capacitor C4.

[0043] Further, the differential detection module 3 includes a first resistor R1, a first diode D1, a second resistor R2, a third resistor R3, a second capacitor C2, a fourth resistor R4, an eighth resistor R8 and a first operational amplifier OP1;

[0044] Specifically, the in-phase end of the first operational amplifier OP1 is connected to the cathode of the first diode D1 and is connected to the first end of the photovoltaic panel through the first resistor R1 and one end of the second resistor R2. The other end of the second resistor R2 is connected to the inverting end of the first operational amplifier OP1, one end of the second capacitor C2 and one end of the fourth resistor R4 and is grounded through the third resistor R3. The anode of the first diode D1 is grounded. The output end of the first operational amplifier OP1 is connected to the other end of the second capacitor C2, the other end of the fourth resistor R4 and the first end of the eighth resistor R8. The second end of the eighth resistor R8 is connected to the signal control module 4.

[0045] In a specific embodiment, the first operational amplifier OP1 may be an OP07 operational amplifier; the third resistor R3 and the second resistor R2 perform voltage sampling, and the first resistor R1 and the first diode D1 provide a reference voltage.

[0046] Further, the signal control module 4 includes a third diode D3 and a first analog switch U2; the feedback module 5 includes a first potentiometer RP1 and a seventh resistor R7;

[0047] Specifically, one end of the first potentiometer RP1 and the slider end are connected to the cathode of the second diode D2, the other end of the first potentiometer RP1 is connected to the fifth end of the first voltage regulator U1 and the cathode of the third diode D3 and is grounded through the seventh resistor R7, the anode of the third diode D3 is connected to the OUT end of the first analog switch U2, the CTRL end of the first analog switch U2 is connected to the output detection module 7, and the IN end of the first analog switch U2 is connected to the second end of the eighth resistor R8.

[0048] In a specific embodiment, the first analog switch U2 can be a CD4066 analog switch.

[0049] Further, the energy storage control module 8 includes a first power tube Q1 and an energy storage device;

[0050] Specifically, the drain of the first power tube Q1 is connected to the cathode of the second diode D2 , the source of the first power tube Q1 is connected to the first end of the energy storage device, the second end of the energy storage device is grounded, and the gate of the first power tube Q1 is connected to the output detection module 7 .

[0051] In a specific embodiment, the first power tube Q1 may be an N-channel field effect tube; the energy storage device may be a battery pack.

[0052] Furthermore, the output detection module 7 includes a first power supply VCC1, a ninth resistor R9 and a first optical coupler U3;

[0053] Specifically, the first power supply VCC1 is connected to the third end of the first optocoupler U3, the gate of the first power tube Q1 and the CTRL end of the first analog switch U2 through the ninth resistor R9, the first end of the first optocoupler U3 is connected to the second end of the output port, the second end of the first optocoupler U3 is grounded, and the fourth end of the first optocoupler U3 is grounded.

[0054] In a specific embodiment, the first optical coupler U3 can be a PC817 photoelectric coupler.

[0055] In a solar power generation voltage regulation circuit of the present embodiment, the photovoltaic panel performs photoelectric conversion, and the first voltage regulator U1 cooperates with the sixth resistor R6, the fifth resistor R5, the third capacitor C3, the fourth capacitor C4, the fifth capacitor C5, the first inductor L1, the sixth capacitor C6 and the second diode D2 to perform voltage regulation processing, and the first voltage regulator U1 adjusts the output voltage according to the signal fed back by the first potentiometer RP1 and the seventh resistor R7. When the output port is not connected to the electrical device, the first optical coupler U3 is turned off, the first power supply VCC1 and the ninth resistor R9 trigger the first power tube Q1 to turn on, and the first analog switch U2 is triggered to work. At this time, the first operational amplifier OP1 cooperates with the first resistor R1, the first diode D1, the second resistor R2, the third resistor R3, the second capacitor C2, the fourth resistor R4 and the eighth resistor R8 to form a differential detection circuit to detect the output of the photovoltaic panel. The first analog switch U2 transmits the signal output by the first operational amplifier OP1 to the first potentiometer RP1 and the seventh resistor R7, and when the voltage output by the photovoltaic panel decreases, the voltage output by the first operational amplifier OP1 increases, so that the voltage input to the fifth terminal of the first voltage regulator U1 increases, which in turn causes the first voltage regulator U1 to reduce the output voltage. When the voltage output by the photovoltaic panel increases, the voltage output by the first operational amplifier OP1 decreases, causing the first voltage regulator U1 to increase the output voltage. The output voltage is transmitted to the energy storage device by the first power tube Q1 to provide the energy storage device with the optimal charging power. When the output port is connected to the electrical device, the first optical coupler U3 will be cut off. At this time, the first power tube Q1 and the first analog switch U2 are both cut off, and the voltage output by the first voltage regulator U1 is stable. The potential value of the first potentiometer RP1 can be adjusted to adjust the voltage of the input and output ports.

[0056] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0057] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A solar power generation voltage regulation circuit, characterized in that: The solar power generation voltage regulation circuit includes: a photovoltaic power generation module, a voltage regulation module, a differential detection module, a signal control module, a feedback module, an output module, an output detection module and an energy storage control module; The photovoltaic power generation module is used to perform photoelectric conversion and output the first electric energy; The voltage stabilization and regulation module is connected to the photovoltaic power generation module and the feedback module, and is used to receive the feedback signal output by the feedback module and perform voltage stabilization and regulation processing on the first electric energy; The differential detection module is connected to the photovoltaic power generation module, and is used to perform voltage division detection on the first electric energy and output a first detection signal, and is used to set a reference threshold and perform differential processing between the first detection signal and the reference threshold, and output a first differential signal; The signal control module is connected to the differential detection module, the output detection module and the feedback module, and is used to receive the first control signal output by the output detection module and transmit the first differential signal to the feedback module; The feedback module is used to perform voltage division processing on the electric energy output by the voltage stabilizing and regulating module and provide a feedback signal to the voltage stabilizing and regulating module, and is used to receive the first differential signal and adjust the voltage value of the feedback signal and the voltage output by the voltage stabilizing and regulating module; The output module is connected to the voltage regulating module and is used to connect to the electrical equipment and receive the electrical energy output by the voltage regulating module; The output detection module is connected to the output module and is used to detect the connection status between the output module and the electric device, and output a first control signal when the output module is not connected to the electric device; The energy storage control module is connected to the voltage stabilizing and regulating module and the output detection module, and is used to receive the first control signal and store the electric energy output by the voltage stabilizing and regulating module.

2. A solar power generation voltage regulating circuit according to claim 1, characterized in that: The photovoltaic power generation module includes a photovoltaic panel and a first capacitor; the voltage regulation module includes a sixth resistor, a fifth resistor, a third capacitor, a fourth capacitor, a first voltage regulator, a fifth capacitor, a first inductor, a sixth capacitor and a second diode; the output module includes an output port; The first end of the photovoltaic panel is connected to one end of the first capacitor and the second end of the first regulator and is connected to the seventh end of the first regulator through a sixth resistor. The eighth end of the first regulator is connected to the other end of the first capacitor, one end of the third capacitor, the second end of the photovoltaic panel, the fourth end of the first regulator and the ground through a fourth capacitor. The other end of the third capacitor is connected to the sixth end of the first regulator through a fifth resistor. The first end of the first regulator is connected to the third end of the first regulator and one end of the first inductor through a fifth capacitor. The other end of the first inductor is connected to the anode of the second diode and is grounded through a sixth capacitor. The cathode of the second capacitor is connected to the first end of the output port, and the second end of the output port is connected to the output detection module.

3. A solar power generation voltage regulating circuit according to claim 2, characterized in that: The differential detection module includes a first resistor, a first diode, a second resistor, a third resistor, a second capacitor, a fourth resistor, an eighth resistor and a first operational amplifier; The in-phase end of the first operational amplifier is connected to the cathode of the first diode and is connected to the first end of the photovoltaic panel and one end of the second resistor through the first resistor, the other end of the second resistor is connected to the inverting end of the first operational amplifier, one end of the second capacitor and one end of the fourth resistor and is grounded through the third resistor, the anode of the first diode is grounded, the output end of the first operational amplifier is connected to the other end of the second capacitor, the other end of the fourth resistor and the first end of the eighth resistor, and the second end of the eighth resistor is connected to the signal control module.

4. A solar power generation voltage regulating circuit according to claim 3, characterized in that: The signal control module includes a third diode and a first analog switch; the feedback module includes a first potentiometer and a seventh resistor; One end of the first potentiometer and the slider end are connected to the cathode of the second diode, the other end of the first potentiometer is connected to the fifth end of the first voltage regulator and the cathode of the third diode and is grounded through the seventh resistor, the anode of the third diode is connected to the OUT end of the first analog switch, the CTRL end of the first analog switch is connected to the output detection module, and the IN end of the first analog switch is connected to the second end of the eighth resistor.

5. A solar power generation voltage regulating circuit according to claim 4, characterized in that: The energy storage control module includes a first power tube and an energy storage device; The drain of the first power tube is connected to the cathode of the second diode, the source of the first power tube is connected to the first end of the energy storage device, the second end of the energy storage device is grounded, and the gate of the first power tube is connected to the output detection module.

6. A solar power generation voltage regulating circuit according to claim 5, characterized in that: The output detection module includes a first power supply, a ninth resistor and a first optical coupler; The first power supply is connected to the third end of the first optocoupler, the gate of the first power tube and the CTRL end of the first analog switch through a ninth resistor, the first end of the first optocoupler is connected to the second end of the output port, the second end of the first optocoupler is grounded, and the fourth end of the first optocoupler is grounded.

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