Solar charging control circuit and solar street lamp control circuit

Abstract

The invention provides a solar charging control circuit and a solar street lamp control circuit. The solar charging control circuit comprises a first detection circuit, a main control circuit and a charging adjustment circuit, the first detection circuit is connected with a first signal input end group of the main control circuit; the first detection circuit is used for collecting a first current and voltage signal output by the solar panel and sending the signal to the master control circuit. The charging adjusting circuit is connected between the electric energy output end of the solar panel and the electric energy input end of the battery; the first signal output end group of the main control circuit is connected with the control end of the charging adjustment circuit, the main control circuit is further used for outputting a disturbance control signal to the charging adjustment circuit, and the charging adjustment circuit is used for adjusting the charging output power of the solar panel according to the disturbance control signal. And the main control circuit determines the charging output power of the solar panel according to the first current and voltage signal, and further adjusts the disturbance control signal, so that the output power of the solar panel is maximized. The circuit improves the charging efficiency of the solar panel through the cooperation of a plurality of circuit modules.

Description

Technical Field

[0001] The present application relates to the field of solar charging, and in particular to a solar charging control circuit and a solar street light control circuit. Background Art

[0002] As a clean and renewable energy source, solar energy is widely used in various fields, including road lighting. Solar street lights use solar panels and batteries to convert sunlight into electrical energy to provide power for street lights, which not only reduces energy consumption but also reduces environmental pollution.

[0003] However, the current charging efficiency of solar panels is generally low, with an efficiency of 60%-80% under different light intensities and temperatures. There are generally pain points such as slow charging and short battery life. Solar panels and charging circuits can be improved as follows: improve the conversion efficiency of solar panels and increase the output power of solar panels. To achieve these goals, it is necessary to use expensive materials for making solar panels or increase the area of ​​solar panels, which increases costs. In addition, many solar products cannot be increased in area due to regulations and structural limitations. Summary of the invention

[0004] In order to overcome the above-mentioned deficiencies in the prior art, the present application provides a solar charging control circuit, which includes a first detection circuit, a main control circuit and a charging adjustment circuit.

[0005] The first detection circuit is connected to the first signal input terminal group of the main control circuit; the first detection circuit is used to collect the first current and voltage signal output by the solar panel and send it to the main control circuit; the main control circuit is used to determine the charging output power of the solar panel according to the first current and voltage signal.

[0006] The charging adjustment circuit is connected between the power output end of the solar panel and the power input end of the battery; the first signal output end group of the main control circuit is connected to the control end of the charging adjustment circuit, and the main control circuit is also used to output a disturbance control signal to the charging adjustment, and the charging adjustment circuit is used to adjust the charging output power of the solar panel according to the disturbance control signal.

[0007] The main control circuit is further used to adjust the disturbance control signal according to the charging output power, so that the charging adjustment circuit controls the output power of the solar panel to be maximized.

[0008] In a possible implementation, the first signal output terminal group of the main control circuit includes a first disturbance signal output terminal and a second disturbance signal output terminal; the charging adjustment circuit includes a switching device group connected between the solar panel and the battery; the switching device group includes a first switching device and a second switching device connected in sequence between the positive output voltage terminal and the ground terminal of the solar panel, the control end of the first switching device is connected to the first disturbance signal output terminal of the main control circuit, and the control end of the second switching device is connected to the second disturbance signal output terminal of the main control circuit.

[0009] The control circuit is used to output the first disturbance signal and the second disturbance signal to the first switching device and the second switching device respectively according to the first current and voltage signal, so as to control the switching device group to generate a disturbance current.

[0010] In a possible implementation, the switching device group further includes a third switching device connected in parallel with the first switching device, and control ends of the first switching device and the third switching device are both connected to the first disturbance signal output end; the switching device group further includes a fourth switching device connected in parallel with the second switching device, and control ends of the second switching device and the fourth switching device are both connected to the second disturbance signal output end.

[0011] In a possible implementation, the first signal input terminal group includes a first voltage signal input terminal and a first current signal input terminal; the first detection circuit includes a first voltage detection circuit and a first current detection circuit; the first voltage detection circuit is connected to the first voltage signal input terminal of the main control circuit, and the first current detection circuit is connected to the first current signal input terminal of the main control circuit.

[0012] In a possible implementation, the solar charging control circuit further includes a second detection circuit and a fifth switching device; a first end of the fifth switching device is connected to the positive power input terminal of the battery, and a second end of the fifth switching device is connected to the ground terminal; the second detection circuit is used to collect a second voltage and current signal output by the battery and send it to the main control circuit.

[0013] In a possible implementation, the fifth switch device is connected to the first switch signal output terminal of the main control circuit; the second detection circuit is connected to the second signal input terminal group of the main control circuit; the main control circuit is used to determine the real-time current of the battery according to the second voltage and current signal, and then control the conduction and closing of the fifth switch device.

[0014] In a possible implementation, the second signal input terminal group includes a second voltage signal input terminal and a second current signal input terminal; the second detection circuit includes a second voltage detection circuit and a second current detection circuit; the second voltage detection circuit is connected to the second voltage signal input terminal of the main control circuit, and the second current detection circuit is connected to the second current signal input terminal of the main control circuit.

[0015] Another aspect of the present application provides a solar street light control circuit, comprising any one of the aforementioned solar charging control circuits and an LED panel.

[0016] In some possible embodiments, the solar street light control circuit also includes a third detection circuit and a sixth switching device; the first end of the sixth switching device is connected to the positive input terminal of the LED panel, and the second end of the sixth switching device is connected to the ground terminal; the third detection circuit is used to collect the third current signal output by the LED panel and send it to the main control circuit.

[0017] In a possible implementation, the sixth switch device is connected to the second switch signal output terminal of the main control circuit; the third detection circuit is connected to the third signal input terminal of the main control circuit; the main control circuit is used to determine the real-time current of the LED board according to the third current signal, and then control the conduction and closing of the sixth switch device.

[0018] Compared with the prior art, this application has the following beneficial effects:

[0019] The present application provides a solar charging control circuit and a solar street light control circuit, which improve the charging efficiency of the solar panel through the cooperation of multiple circuit modules. In the present application, the main control circuit determines the charging output power of the solar panel according to the first current and voltage signal, and then adjusts the disturbance control signal to maximize the output power of the solar panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 One of the schematic diagrams of the solar charging control circuit provided in this embodiment;

[0022] Figure 2 The second schematic diagram of the solar charging control circuit provided in this embodiment;

[0023] Figure 3 A schematic diagram of a first detection circuit provided in this embodiment;

[0024] Figure 4 A schematic diagram of the main control circuit provided in this embodiment;

[0025] Figure 5 One of the schematic diagrams of the charging adjustment circuit provided in this embodiment;

[0026] Figure 6 The second schematic diagram of the charging adjustment circuit provided in this embodiment;

[0027] Figure 7 The third schematic diagram of the solar charging control circuit provided in this embodiment;

[0028] Figure 8 The fourth schematic diagram of the solar charging control circuit provided in this embodiment;

[0029] Fig. 9 A schematic diagram of a second detection circuit provided in this embodiment;

[0030] Fig.10 Schematic diagram of multiple chips provided for this embodiment;

[0031] Fig.11 A schematic diagram of a solar street light control circuit provided in this embodiment;

[0032] Fig.12 A schematic diagram of a third detection circuit provided in this embodiment;

[0033] Fig.13 This is a schematic diagram of the indication circuit provided in this embodiment.

[0034] Icon: 900-solar charging control circuit; 800-solar street light control circuit; 100-first detection circuit; 110-first voltage detection circuit; 120-first current detection circuit; 200-charging adjustment circuit; 210-switching device group; 300-second detection circuit; 310-second voltage detection circuit; 320-second current detection circuit; 400-third detection circuit; U1-main control circuit; P1-solar panel; P2-battery; P3-LED board; P4-in-circuit programming chip; P5-communication chip; P6-infrared solar radiation detection chip; 1-second disturbance signal output terminal; 2-first disturbance signal output terminal; 5-first switch signal output terminal; 12-first operation state signal input terminal; 13-second operation state signal input terminal; 15-first voltage signal input terminal; 19-second voltage signal input terminal; 20-third signal input terminal; 21-second current signal input terminal; 22-first current signal input terminal; 23-second switch signal output terminal; D1-first photosensitivity diode; D2-second photosensitive diode; D3-third diode; C2-second capacitor; C3-electrolytic capacitor; C4-fourth capacitor; C5-fifth capacitor; C6-sixth capacitor; C7-seventh capacitor; C8-eighth capacitor; Q1-first switch device; Q2-second switch device; Q3-third switch device; Q4-fourth switch device; Q5-fifth switch device; Q6-sixth switch device; Q7-seventh switch device; R1-first resistor; R2-second resistor; R3-third resistor; R 4-the fourth resistor; R5-the fifth resistor; R6-the sixth resistor; R7-the seventh resistor; R8-the eighth resistor; R9-the ninth resistor; R10-the tenth resistor; R11-the eleventh resistor; R12-the twelfth resistor; R13-the thirteenth resistor; R14-the fourteenth resistor; R15-the fifteenth resistor; R16-the sixteenth resistor; R17-the seventeenth resistor; R18-the eighteenth resistor; R19-the nineteenth resistor; R20-the twentieth resistor; R21-the twenty-first resistor; GND-ground terminal. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0036] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0037] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0038] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the application is usually placed when in use. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0039] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0040] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0041] The specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings.

[0042] Please refer to Figure 1 The present application provides a solar charging control circuit 900 , which is characterized by including a first detection circuit 100 , a main control circuit U1 and a charging adjustment circuit 200 .

[0043] The first detection circuit 100 is connected to the first signal input terminal group of the main control circuit U1; the first detection circuit 100 is used to collect the first current and voltage signal output by the solar panel P1 and send it to the main control circuit U1; the main control circuit U1 is used to determine the charging output power of the solar panel P1 according to the first current and voltage signal.

[0044] The charging adjustment circuit 200 is connected between the power output end of the solar panel P1 and the power input end of the battery P2; the first signal output end group of the main control circuit U1 is connected to the control end of the charging adjustment circuit 200, and the main control circuit U1 is also used to output a disturbance control signal to the charging adjustment, and the charging adjustment circuit 200 is used to adjust the charging output power of the solar panel P1 according to the disturbance control signal.

[0045] The main control circuit U1 is further configured to adjust the disturbance control signal according to the charging output power, so that the charging adjustment circuit 200 controls the output power of the solar panel P1 to be maximized.

[0046] In this embodiment, the main control circuit U1 includes a single-chip microcomputer module, which detects the output voltage and output current of the solar panel P1 in real time through the first detection circuit 100, calculates the output power of the solar panel P1, and changes the first signal output terminal group through the maximum power point tracking algorithm (Maximum Power Point Tracking, MPPT) tracking library function, thereby changing the duty cycle of the switch tube MOSFET of the charging adjustment circuit 200 to generate current disturbance, so that the output current and voltage of the solar panel P1 also change accordingly. By detecting and calculating the changes in the output power and voltage of the solar panel P1 before and after the disturbance, the disturbance direction of the next cycle is determined. When the disturbance direction is correct, the output power of the solar panel P1 increases, and the disturbance continues in the same direction in the next cycle. Otherwise, the disturbance is in the opposite direction. The disturbance is repeated in this way, so that the solar panel P1 always works at the maximum power point under the current environment to charge the battery P2, thereby improving the charging efficiency of the solar panel P1.

[0047] It is worth noting that the power output terminal mentioned in this embodiment includes a positive power output terminal and a negative power output terminal; the power input terminal includes a positive power input terminal and a negative power input terminal.

[0048] Since the purpose of the MPPT algorithm is to maximize the power output of the photovoltaic cell P2 panel, it is necessary to consider the voltage and current of the photovoltaic cell P2 at the same time. The output power of the photovoltaic cell P2 is determined by the product of its voltage and current. To find the maximum power point, it is necessary to find the best point of the voltage and current combination, that is, at this point, the product of the voltage and current is the largest. The maximum power point is not a fixed value, it will change with changes in external conditions. In order to accurately track this point, it is necessary to detect the voltage and current in real time. Therefore, in this embodiment, the first detection circuit 100 includes a first voltage detection circuit 110 and a first current detection circuit 120.

[0049] Optionally, see Figure 2 The first signal input terminal group includes a first voltage signal input terminal and a first current signal input terminal; the first detection circuit 100 includes a first voltage detection circuit 110 and a first current detection circuit 120; the first voltage detection circuit 110 is connected to the first voltage signal input terminal of the main control circuit U1, and the first current detection circuit 120 is connected to the first current signal input terminal of the main control circuit U1.

[0050] Optionally, see Figure 3 The first current detection circuit 120 includes a first resistor R1 and a second resistor R2 respectively connected in parallel between the negative power output terminal of the solar panel P1 and the ground terminal GND, and a third resistor R3 and a fourth capacitor C4 sequentially connected in series between the negative power output terminal of the solar panel P1 and the ground terminal GND and respectively connected in parallel with the first resistor R1 and the second resistor R2, and the first current signal input terminal is connected between the third resistor R3 and the fourth capacitor C4; the first voltage detection circuit 110 includes a fourth resistor R4 and a fifth resistor R5 sequentially connected in series between the positive power output terminal of the solar panel P1 and the ground terminal GND, and a fifth capacitor C5 connected in parallel with the fifth resistor R5, and the first voltage signal input terminal is connected between the second resistor R2 and the twelfth resistor R12.

[0051] Optionally, see Figure 4 The main control circuit U1 includes a plurality of input and output ports for receiving and sending signals. Among them, the first voltage signal input terminal can be Figure 4 The 15th port of the chip shown in the figure, the first current signal input terminal can be Figure 4 Port 22 of the chip shown.

[0052] Optionally, please refer again to Figure 3 In this embodiment, the solar charging control circuit 900 is also provided with a second capacitor C2, a first end of the second capacitor C2 is connected to the positive input terminal of the solar panel P1, and a second end of the second capacitor C2 is connected to the ground terminal GND; and also includes an electrolytic capacitor C3 connected in parallel with the second capacitor C2.

[0053] In the solar charging control circuit 900, the second capacitor C2 and the electrolytic capacitor C3 connected in parallel smooth the voltage fluctuations through filtering, protect the battery P2 panel from transient impacts, and improve the system stability. It can also protect the solar cell P2 panel to a certain extent. When transient voltage or current impacts occur in the circuit, the capacitor can absorb these impacts and reduce damage to the battery P2 panel.

[0054] For some possible implementations, see Figure 5 The first signal output terminal group of the main control circuit U1 includes a first disturbance signal output terminal and a second disturbance signal output terminal. For example, the first disturbance signal output terminal can be Figure 4 The second port of the chip shown in the figure, the second disturbance signal output terminal can be Figure 4 Port 1 of the chip shown.

[0055] The charging regulation circuit 200 includes a switch device group 210 connected between the solar panel P1 and the battery P2.

[0056] The switch device group 210 includes a first switch device Q1 and a second switch device Q2 which are sequentially connected between the positive output voltage terminal of the solar panel P1 and the ground terminal GND. The control end of the first switch device Q1 is connected to the first disturbance signal output terminal of the main control circuit U1 via a seventh resistor R7, and the control end of the second switch device Q2 is connected to the second disturbance signal output terminal of the main control circuit U1 via an eighth resistor R8.

[0057] The main control circuit U1 is used to output the first disturbance signal and the second disturbance signal to the first switching device Q1 and the second switching device Q2 respectively according to the first current and voltage signal, so as to control the switching device group 210 to generate a disturbance current.

[0058] In this embodiment, the charging adjustment circuit also includes an impedance circuit, which is connected between the switch device group 210 and the battery P2, and includes an inductor and a first capacitor. The first end of the inductor is connected between the first switch device Q1 and the second switch device Q2, and the second end of the inductor is connected to the positive input end of the battery P2; the first capacitor is connected between the second end of the inductor and the ground terminal GND. When the first switch device Q1 is driven to a high level, the upper end is turned on, and the second switch device Q2 is driven to a low level, the lower end is turned off, the inductor is magnetized, and the current flowing through the inductor increases linearly, and the first capacitor is charged at the same time; when the first switch device Q1 is driven to a low level, the upper end is turned off, and the second switch device Q2 is driven to a high level, the lower end is turned on, the energy storage inductor is discharged through the lower tube, the inductor current is linearly reduced, and the output voltage is maintained by the discharge of the first capacitor and the reduced inductor current. In this way, the main control circuit U1 periodically controls the switching device group 210 to turn on and off by outputting the first disturbance signal and the second disturbance signal to the charging adjustment circuit 200, thereby generating a disturbance current, and the magnitude of the disturbance current can be adjusted by the main control circuit U1.

[0059] For some possible implementations, see Figure 6 The switching device group 210 also includes a third switching device Q3 connected in parallel with the first switching device Q1, and the control ends of the first switching device Q1 and the third switching device Q3 are both connected to the first disturbance signal output end; the switching device group 210 also includes a fourth switching device Q4 connected in parallel with the second switching device Q2, and the control ends of the second switching device Q2 and the fourth switching device Q4 are both connected to the second disturbance signal output end.

[0060] In this embodiment, in order to improve the output current capability of the switch device group 210 and effectively reduce the heat generation of a single MOS tube, a third switch device Q3 and a fourth switch device Q4 are respectively connected in parallel with the first switch device Q1 and the second switch device Q2 in the charging adjustment circuit 200. By connecting two MOS tubes in parallel, the circuit can share the current load, thereby doubling the output current while keeping the original duty cycle control strategy unchanged. This not only improves the output capacity of the circuit, but also ensures stable operation under a higher current load. At the same time, since the current is distributed between the two MOS tubes, the heat generation of each MOS tube is effectively controlled, which is beneficial to extending the service life of the MOS tube and improving the overall reliability and heat dissipation capability of the circuit.

[0061] For some possible implementations, see Figure 7The solar charging control circuit 900 also includes a second detection circuit 300 and a fifth switch device Q5; a first end of the fifth switch device Q5 is connected to the positive input end of the battery P2, and a second end of the fifth switch device Q5 is connected to the ground end GND; the second detection circuit 300 is used to collect the second voltage and current signal output by the battery P2 and send it to the main control circuit U1.

[0062] In order to ensure that the solar charging system can both efficiently charge the battery P2 and protect the battery P2 from damage, in the present embodiment, the solar charging control circuit 900 further includes a second detection circuit 300 and a fifth switching device Q5. The main control circuit U1 adjusts the charging current and voltage according to the real-time voltage and current changes of the battery P2 to adapt to batteries P2 of different types and states, thereby ensuring the charging efficiency.

[0063] Optionally, the fifth switching device Q5 is connected to the first switching signal output terminal of the main control circuit U1; the second detection circuit 300 is connected to the second signal input terminal group of the main control circuit U1; the main control circuit U1 is used to determine the real-time current of the battery P2 according to the second voltage and current signal, and then control the conduction and closing of the fifth switching device Q5.

[0064] For example, when the second detection circuit 300 detects that the circuit current and voltage are abnormal, the second voltage and current signal is transmitted to the main control circuit U1 through the second signal input terminal group, and the main control circuit U1 controls the fifth switch device Q5 to be turned off.

[0065] Optionally, please refer again to Figure 3 The drain of the fifth switch device Q5 is connected to the positive power output terminal of the solar panel P1, the source is connected to the positive power output terminal of the battery P2, the gate is connected to the ground terminal GND via the seventh switch device Q7, and the gate of the seventh switch device Q7 is connected to the first switch signal output terminal via the sixth resistor R6.

[0066] Since detecting the voltage of battery P2 can only provide approximate information about the charging status of battery P2, but cannot determine whether battery P2 is receiving the optimal current, if only the voltage is monitored, the actual charging needs of battery P2 may be ignored, resulting in low charging efficiency or damage to battery P2; only detecting the current of battery P2 can show how much charge battery P2 is receiving, but it cannot provide the charging status of battery P2 or whether it is fully charged. If only the current is monitored, battery P2 may continue to charge when it does not need more charge, resulting in overcharging. Therefore, in this embodiment, please refer to Figure 8 The second detection circuit 300 includes a second voltage detection circuit 310 and a second current detection circuit 320 .

[0067] Optionally, the second signal input terminal group includes a second voltage signal input terminal and a second current signal input terminal; the second detection circuit 300 includes a second voltage detection circuit 310 and a second current detection circuit 320; the second voltage detection circuit 310 is connected to the second voltage signal input terminal of the main control circuit U1, and the second current detection circuit 320 is connected to the second current signal input terminal of the main control circuit U1. For example, the second voltage signal input terminal can be Figure 4 The 19th port of the chip shown in the figure, the second current signal input terminal can be Figure 4 The 21st port of the chip shown in the figure, the first switch signal output terminal can be Figure 4 Port 5 of the chip shown.

[0068] Optionally, see Fig. 9 The second current detection circuit 320 includes a twelfth resistor R12 and a thirteenth resistor R13 respectively connected in parallel between the negative power input terminal of the battery P2 and the ground terminal GND, and an eleventh resistor R11 and a seventh capacitor C7 sequentially connected in series between the negative power input terminal of the battery P2 and the ground terminal GND and connected in parallel with the twelfth resistor R12 and the thirteenth resistor R13, and the second current signal input terminal is connected between the eleventh resistor R11 and the seventh capacitor C7; the second voltage detection circuit 310 includes a ninth resistor R9 and a tenth resistor R10 sequentially connected in series between the positive power input terminal of the battery P2 and the ground terminal GND, and a sixth capacitor C6 connected in parallel with the tenth resistor R10, and the second voltage signal input terminal is connected between the ninth resistor R9 and the tenth resistor R10.

[0069] It is worth noting that the main control circuit U1 described in the present application not only covers the above-mentioned input and output ports, but also includes other indispensable ports and components, which further improves the performance of the main control circuit U1 and ensures its reliable operation.

[0070] In addition, please refer to Fig.10 The solar charging control circuit 900 described in the present application also includes multiple chips, such as an in-circuit programming chip P4, a communication chip P5, and an infrared solar radiation detection chip P6, etc. Multiple connection ports are set on the chip, and the multiple connection ports are connected to the input and output ports of the main control circuit U1 to realize functions such as data reception and transmission.

[0071] The present application example also provides a solar street light control circuit 800, including any of the aforementioned solar charging control circuits 900 and LED panels P3. The light energy absorbed by the solar panel P1 during the day is converted into electrical energy, and the electrical energy output is optimized through MPPT to ensure that the solar panel P1 always operates at the maximum power point. At the same time, the control circuit stores the optimized electrical energy in the battery P2 for use at night or on cloudy days. When there is insufficient sunlight, the control circuit automatically switches to the battery P2 for power supply to ensure stable lighting of the LED panel P3, thereby realizing an environmentally friendly, energy-saving and automated lighting system suitable for a variety of outdoor lighting needs.

[0072] For some possible implementations, please refer to Fig.11 The solar street light control circuit 800 also includes a third detection circuit 400 and a sixth switch device Q6; the first end of the sixth switch device Q6 is connected to the positive input end of the LED board P3, and the second end of the sixth switch device Q6 is connected to the ground terminal GND; the third detection circuit 400 is used to collect the third current signal output by the LED board P3 and send it to the main control circuit U1.

[0073] Optionally, the sixth switch device Q6 is connected to the second switch signal output terminal of the main control circuit U1; the third detection circuit 400 is connected to the third signal input terminal of the main control circuit U1; the main control circuit U1 is used to determine the real-time current of the LED board P3 according to the third current signal, and then control the conduction and shutdown of the sixth switch device Q6. For example, the third signal input terminal can be Figure 4 The 20th port of the chip shown in the figure, the second switch signal output terminal can be Figure 4 Port 23 of the chip shown.

[0074] Optionally, see Fig.12 The drain of the sixth switch device Q6 is connected to the power input terminal of the LED board P3, the source is grounded via the seventeenth resistor R17, the gate is connected to the second switch signal output terminal via the third diode D3, and the fourteenth resistor R14 is connected in parallel with the third diode D3.

[0075] In order to cut off the power supply in time when the current rises abnormally, prevent the LED board P3 from being damaged due to overload, and extend its service life, in this embodiment, the solar street light control circuit 800 also includes a third detection circuit 400 and a sixth switch device Q6. For example, when the third detection circuit 400 detects that the circuit current rises abnormally, the third current signal is transmitted to the main control circuit U1 through the third signal input terminal, and the main control circuit U1 controls the sixth switch device Q6 to turn off. Doing so not only protects the LED board P3 and improves the reliability of the system, but also ensures the user's lighting experience, while meeting electrical safety standards.

[0076] Optionally, see Fig.12 The third detection circuit 400 is a current detection circuit, including a seventeenth resistor R17, an eighteenth resistor R18, a nineteenth resistor R19 and a twentieth resistor R20 respectively connected in parallel between the power input terminal of the LED board P3 and the ground terminal GND, and a sixteenth resistor R16 and an eighth capacitor C8 which are sequentially connected in series between the power input terminal of the LED board P3 and the ground terminal GND and are respectively connected in parallel with the seventeenth resistor R17, the eighteenth resistor R18, the nineteenth resistor R19 and the twentieth resistor R20, and the third signal input terminal is connected between the sixteenth resistor R16 and the eighth capacitor C8.

[0077] It is worth mentioning that please refer to Fig.13 In order to display the operating status of the solar street light control circuit 800 in real time and to give an alarm when it fails or has an operating error, the solar street light control circuit 800 is also provided with two photosensitive diodes, the first end of the first photosensitive diode D1 is connected to the first operating status signal input terminal 12 of the main control circuit U1 via the twenty-first resistor R21, and the second end of the first photosensitive diode D1 is connected to the ground terminal GND; the first end of the second photosensitive diode D1 is connected to the second operating status signal input terminal 13 of the main control circuit U1 via the twenty-second resistor R22, and the second end of the second photosensitive diode D1 is connected to the ground terminal GND; the photosensitive diode acts as a light sensor to detect changes in ambient light in real time, transmit different operating status signals to the main control circuit U1, and display the operating status of the solar street light control circuit 800 by turning on and off the indicator light.

[0078] In summary, the present application provides a solar charging control circuit 900 and a solar street light control circuit 800, including a first detection circuit 100, a main control circuit U1 and a charging adjustment circuit 200; the first detection circuit 100 is connected to the first signal input terminal group of the main control circuit U1; the first detection circuit 100 is used to collect the first current and voltage signal output by the solar panel P1 and send it to the main control circuit U1; the charging adjustment circuit 200 is connected between the power output terminal of the solar panel P1 and the power input terminal of the battery P2; the first signal output terminal group of the main control circuit U1 is connected to the control terminal of the charging adjustment circuit 200, and the main control circuit U1 is also used to adjust the disturbance control signal output to the charging, and the charging adjustment circuit 200 is used to adjust the charging output power of the solar panel P1 according to the disturbance control signal. The main control circuit U1 determines the charging output power of the solar panel P1 according to the first current and voltage signal, and then adjusts the disturbance control signal to maximize the output power of the solar panel P1. This circuit improves the charging efficiency of the solar panel P1 through the coordinated cooperation of multiple circuit modules.

[0079] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A solar charging control circuit, It is characterized in that It includes a first detection circuit, a main control circuit and a charging adjustment circuit; The first detection circuit is connected to the first signal input terminal group of the main control circuit; the first detection circuit is used to collect the first current and voltage signal output by the solar panel and send it to the main control circuit; The main control circuit is used to determine the charging output power of the solar panel according to the first current and voltage signal; The charging adjustment circuit is connected between the power output terminal of the solar panel and the power input terminal of the battery; the first signal output terminal group of the main control circuit is connected to the control terminal of the charging adjustment circuit, and the main control circuit is also used to adjust the disturbance control signal output to the charging, and the charging adjustment circuit is used to adjust the charging output power of the solar panel according to the disturbance control signal; The main control circuit is further used to adjust the disturbance control signal according to the charging output power, so that the charging adjustment circuit controls the output power of the solar panel to be maximized.

2. The solar charging control circuit according to claim 1, It is characterized in that The first signal output terminal group of the main control circuit includes a first disturbance signal output terminal and a second disturbance signal output terminal; The charging adjustment circuit includes a switch device group connected between the solar panel and the battery; The switch device group includes a first switch device and a second switch device which are sequentially connected between the positive output voltage terminal and the ground terminal of the solar panel, the control terminal of the first switch device is connected to the first disturbance signal output terminal of the main control circuit, and the control terminal of the second switch device is connected to the second disturbance signal output terminal of the main control circuit; The control circuit is used to output the first disturbance signal and the second disturbance signal to the first switching device and the second switching device respectively according to the first current and voltage signal, so as to control the switching device group to generate a disturbance current.

3. The solar charging control circuit according to claim 2, It is characterized in that The switch device group further includes a third switch device connected in parallel with the first switch device, and control terminals of the first switch device and the third switch device are both connected to the first disturbance signal output terminal; The switch device group further includes a fourth switch device connected in parallel with the second switch device, and control terminals of the second switch device and the fourth switch device are both connected to the second disturbance signal output terminal.

4. The solar charging control circuit according to claim 1, It is characterized in that The first signal input terminal group includes a first voltage signal input terminal and a first current signal input terminal; The first detection circuit includes a first voltage detection circuit and a first current detection circuit; The first voltage detection circuit is connected to a first voltage signal input terminal of the main control circuit, and the first current detection circuit is connected to a first current signal input terminal of the main control circuit.

5. The solar charging control circuit according to claim 1, It is characterized in that The solar charging control circuit also includes a second detection circuit and a fifth switch device; A first terminal of the fifth switch device is connected to the positive power input terminal of the battery, and a second terminal of the fifth switch device is connected to the ground terminal; The second detection circuit is used to collect the second voltage and current signal output by the battery and send it to the main control circuit.

6. The solar charging control circuit according to claim 5, It is characterized in that The fifth switch device is connected to the first switch signal output terminal of the main control circuit; The second detection circuit is connected to the second signal input terminal group of the main control circuit; The main control circuit is used to determine the real-time current of the battery according to the second voltage and current signal, and then control the on and off of the fifth switch device.

7. The solar charging control circuit according to claim 6, It is characterized in that The second signal input terminal group includes a second voltage signal input terminal and a second current signal input terminal; The second detection circuit includes a second voltage detection circuit and a second current detection circuit; The second voltage detection circuit is connected to a second voltage signal input terminal of the main control circuit, and the second current detection circuit is connected to a second current signal input terminal of the main control circuit.

8. A solar street light control circuit, It is characterized in that The solar street light control circuit comprises any one of the solar charging control circuits and LED panels described in claims 1-7.

9. The solar street light control circuit according to claim 8, It is characterized in that The solar street light control circuit also includes a third detection circuit and a sixth switch device; A first end of the sixth switch device is connected to the positive power input end of the LED board, and a second end of the sixth switch device is connected to the ground end; The third detection circuit is used to collect the third current signal output by the LED board and send it to the main control circuit.

10. The solar street light control circuit according to claim 9, It is characterized in that The sixth switch device is connected to the second switch signal output terminal of the main control circuit; The third detection circuit is connected to the third signal input terminal of the main control circuit; The main control circuit is used to determine the real-time current of the LED board according to the third current signal, and then control the conduction and closing of the sixth switch device.

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