Load protection device and protection method based on MPPT controller

Abstract

The application discloses a load protection device based on an MPPT controller and a protection method thereof, and relates to the technical field of controller protection devices.The load protection device based on the MPPT controller comprises a fixing frame, a controller is fixedly connected to one side surface of the fixing frame, a chip is fixedly connected to the inside of the controller, a heat dissipation plate is inserted into the upper surface of the controller, and the lower surface of the heat dissipation plate is attached to the chip.The device can avoid the direct irradiation of strong light to cause the temperature rise of the inside of the controller, improve the efficiency and stability of the system, reduce the damage of the direct irradiation of strong light to the internal electronic elements and external materials of the controller and the interference generated by the controller, reduce the faults and damages caused by the irradiation of strong light, avoid the surface of an auxiliary plate being blocked by pollutants to cause the poor heat dissipation effect, improve the heat dissipation effect in the inside of the controller, help reduce the short circuit or electric leakage of a circuit board caused by dust and dirt, and improve the stability and safety of the system.

Description

Technical Field

[0001] This invention relates to the field of controller protection device technology, specifically to a load protection device and protection method based on an MPPT controller. Background Technology

[0002] An MPPT controller is an electronic device used in solar photovoltaic power generation systems to achieve maximum power point tracking.

[0003] In a solar photovoltaic (PV) power generation system, the output power of the solar panel varies with changes in environmental factors such as light intensity and temperature. To improve the efficiency of the solar PV power generation system, the solar panel needs to always operate at its maximum power point. The MPPT controller monitors the output voltage and current of the solar panel in real time and adjusts the operating point of the solar panel according to the maximum power point tracking algorithm, keeping it close to the maximum power point. This can improve the output power of the solar panel and increase the efficiency of the PV power generation system.

[0004] The following problems may occur with existing MPPT controller load protection devices during use:

[0005] MPPT controllers are typically installed directly near solar panels to monitor their output voltage and current, improving system efficiency. During operation, to ensure sufficient solar radiation, solar panels need to be placed in open, unobstructed areas to maximize power generation. This exposes the MPPT controller to direct sunlight. However, prolonged exposure to sunlight causes the controller's temperature to rise, damaging internal components and electronic equipment, reducing its performance and reliability. This leads to decreased energy conversion efficiency, impacting the overall efficiency of the solar power system. Furthermore, long-term exposure to strong sunlight accelerates the aging and damage of the MPPT controller, shortening its lifespan and increasing maintenance and replacement costs.

[0006] In addition, since the MPPT controller is located in an open and unobstructed area, dust can easily accumulate on the surface of the heat sink used to cool the inside of the MPPT controller. When the surface of the heat sink is blocked by contaminants, it will hinder the dissipation of heat, causing some heat sinks to be unable to effectively reduce the temperature inside the MPPT controller, thus reducing the heat dissipation effect.

[0007] Therefore, this invention proposes a load protection device and its protection method based on an MPPT controller to compensate for and improve the deficiencies of the prior art. Summary of the Invention

[0008] (a) Technical problems to be solved

[0009] To address the shortcomings of existing technologies, this invention provides a load protection device and method based on an MPPT controller, which solves the problems mentioned in the background section.

[0010] (II) Technical Solution

[0011] To achieve the above objectives, the present invention provides the following technical solution: a load protection device based on an MPPT controller, comprising a mounting frame, a controller fixedly connected to one side surface of the mounting frame, a chip fixedly connected inside the controller, a display screen fixedly connected to the side surface of the controller away from the mounting frame, connection holes evenly distributed on the side surface of the controller away from the mounting frame, a heat sink inserted into the upper surface of the controller, the lower surface of the heat sink being in contact with the chip, the upper surface of the heat sink extending above the controller, a liquid storage tank fixedly connected to the upper surface of the mounting frame, an inlet pipe and an outlet pipe respectively connected to the side of the liquid storage tank near the heat sink, and the ends of the inlet pipe and the outlet pipe away from the liquid storage tank being connected to the heat sink.

[0012] Preferably, an auxiliary plate is fixedly connected to the upper surface of the heat sink extending above the controller. The auxiliary plate is arc-shaped and blocks the connection between the heat sink and the controller.

[0013] Preferably, a first connecting rod is rotatably connected to the side surface of the fixed frame near the controller, a second connecting rod is rotatably connected to the side surface of the fixed frame near the controller, a third connecting rod is rotatably connected to the end of the first connecting rod away from the fixed frame, a second connecting rod is rotatably connected to the end of the third connecting rod away from the first connecting rod, a fourth connecting rod is rotatably connected to the end of the first connecting rod, a fifth connecting rod is rotatably connected to the end of the second connecting rod away from the fixed frame, a fifth connecting rod is rotatably connected to the end of the fourth connecting rod away from the first connecting rod, and a baffle is fixedly connected to the lower surface of the fifth connecting rod.

[0014] Preferably, link two and link four are parallel to each other during movement, and link three and link five are parallel to each other during movement.

[0015] Preferably, the upper surface of the fixing frame is provided with a sliding groove, and a sliding rod is slidably connected inside the sliding groove. A cleaning column is fixedly connected to the side of the sliding rod near the controller.

[0016] Preferably, a cleaning block is detachably connected to the lower surface of the cleaning column, and the cleaning block is attached to the upper surface of the auxiliary plate.

[0017] Preferably, a straight groove is formed on the side surface of the slide rod near the baffle, and a slider is fixedly connected to the side surface of the baffle near the slide rod, the slider being slidably connected inside the straight groove.

[0018] The load protection method based on MPPT controller includes the following steps:

[0019] Step 1: Set the threshold: Install a temperature sensor inside the controller and set the overheat protection threshold in the load protection device according to the design and requirements of the MPPT controller.

[0020] Step 2, Temperature Monitoring: The temperature sensor monitors the internal temperature of the controller in real time and compares the real-time temperature value with a predefined overheat threshold;

[0021] Step 3: Cooling process: When the temperature detected by the temperature sensor exceeds the overheating threshold, the load protection device will automatically trigger the protection mechanism for the MPPT controller, reduce the load power supply, and cool the inside of the controller through the heat sink.

[0022] Step 4: Resumption of Operation: Once the internal temperature of the controller has been reduced to a safe range using a heat sink, the controller will resume normal operation.

[0023] Preferably, in step two, during temperature monitoring, maintenance personnel need to periodically check and clean the temperature sensor installed inside the controller to monitor the temperature, in order to avoid inaccurate temperature monitoring inside the controller due to sensor malfunction.

[0024] Preferably, after resuming operation, the temperature sensor will continuously monitor the temperature inside the controller to ensure that the temperature remains within a safe range. If the monitored temperature exceeds the overheating threshold again, the load protection device will repeat steps three to four.

[0025] (III) Beneficial Effects

[0026] The load protection device and method based on the MPPT controller provided by this invention have the following beneficial effects:

[0027] 1. Through the baffle connected to link five, during use, when the photosensitive sensor detects that the light intensity exceeds the light intensity threshold, the photosensitive sensor controls link one to rotate via the drive device. When link one rotates, it drives link five to rotate via link two and link four. After link five rotates, it drives the baffle connected to link five to shield the controller, preventing direct exposure to strong light from causing the internal temperature of the controller to rise, reducing the controller's operating temperature, maintaining its normal operating state, thereby improving the system's efficiency and stability, reducing the damage of direct exposure to strong light to the controller's internal electronic components and external materials, extending its service life, reducing interference caused by direct exposure to strong light to the controller, improving the controller's stability and accuracy, reducing malfunctions and damage caused by strong light exposure, reducing the maintenance requirements of the controller, and improving the system's availability.

[0028] 2. The cleaning column, fixedly connected to the sliding rod, moves via a slider when in use. As the cleaning column moves, the cleaning block connected to it removes dust and other impurities adhering to the upper surface of the auxiliary plate. This prevents the heat sink from obstructing the heat sink's cooling of the controller's internal components, ensuring good heat conduction and improving the controller's internal cooling effect. This prevents overheating, reduces heat accumulation, lowers the risk of controller malfunctions due to overheating, and extends its lifespan. It also helps reduce short circuits or leakage on the circuit board caused by dust and dirt, improving system stability and safety.

[0029] 3. By making the upper surface of the auxiliary plate curved and shielding the connection between the heat sink and the controller, the curved surface increases the heat dissipation surface area of ​​the heat sink compared to a flat surface, thus improving heat dissipation efficiency and helping to reduce the internal temperature of the controller. The curved surface also allows rainwater to flow more easily to the surroundings instead of accumulating on the upper surface of the auxiliary plate. Furthermore, the shielding of the connection between the heat sink and the controller reduces the risk of rainwater entering the controller, improving its waterproof performance. In addition, larger dust and debris falling onto the upper surface of the auxiliary plate will slide off due to gravity, reducing the accumulation of dust and debris on its surface and helping to keep the upper surface of the auxiliary plate clean, thus reducing the impact of dust on the heat sink's heat dissipation efficiency. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the main structure of the present invention;

[0031] Figure 2 This is a partial structural diagram of the heat sink of the present invention;

[0032] Figure 3 This is a top-view three-dimensional structural diagram of the main body of the invention;

[0033] Figure 4 For the present invention Figure 3 A magnified structural diagram of A in the middle;

[0034] Figure 5 This is a side view of the three-dimensional structure of the main body of the present invention;

[0035] Figure 6 This is a schematic diagram of the baffle structure before movement according to the present invention;

[0036] Figure 7 This is a schematic diagram of the structure of the baffle after movement according to the present invention;

[0037] Figure 8 This is a flowchart of the protection method of the present invention.

[0038] The labels in the diagram represent:

[0039] 1. Mounting frame; 2. Controller; 3. Chip; 4. Display screen; 5. Connection hole; 6. Heat sink; 7. Liquid storage tank; 8. Inlet pipe; 9. Outlet pipe; 10. Auxiliary plate; 11. Link 1; 12. Link 2; 13. Link 3; 14. Link 4; 15. Link 5; 16. Baffle; 17. Slide groove; 18. Slide rod; 19. Cleaning column; 20. Straight groove opening; 21. Slider. Detailed Implementation

[0040] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] refer to Figures 1 to 7 A preferred embodiment of the load protection device and method based on an MPPT controller according to the present invention will be described in detail below. The load protection device based on an MPPT controller includes a mounting frame 1, a controller 2 fixedly connected to one side surface of the mounting frame 1, a temperature sensor for monitoring the internal temperature of the controller 2 being installed inside the controller 2, a chip 3 fixedly connected inside the controller 2, a display screen 4 fixedly connected to the side surface of the controller 2 away from the mounting frame 1, and connection holes 5 evenly distributed on the side surface of the controller 2 away from the mounting frame 1. A heat sink 6 is inserted into the upper surface of the controller 2. The lower surface of the heat sink 6 is attached to the chip 3. The upper surface of the heat sink 6 extends above the controller 2. A liquid storage tank 7 is fixedly connected to the upper surface of the mounting bracket 1. The liquid storage tank 7 is filled with coolant. The side of the liquid storage tank 7 near the heat sink 6 is connected to an inlet pipe 8 and an outlet pipe 9. The ends of the inlet pipe 8 and the outlet pipe 9 away from the liquid storage tank 7 are connected to the heat sink 6. The temperature sensor, through the control device, delivers the coolant inside the liquid storage tank 7 to the inside of the heat sink 6 through the inlet pipe 8, and then it flows out through the outlet pipe 9.

[0042] An auxiliary plate 10 is fixedly connected to the upper surface of the heat sink 6 above the controller 2. The auxiliary plate 10 is arc-shaped and blocks the connection between the heat sink 6 and the controller 2. In use, compared with a flat surface, the arc-shaped surface can increase the heat dissipation surface area of ​​the heat sink 6, better dissipate heat, and thus improve heat dissipation efficiency, which helps to reduce the internal temperature of the controller 2. The arc-shaped surface also makes it easier for rainwater to flow to the surroundings instead of accumulating on the upper surface of the auxiliary plate 10. Furthermore, since the auxiliary plate 10 blocks the connection between the heat sink 6 and the controller 2, it can reduce the risk of rainwater entering the controller 2 and improve the waterproof performance of the controller 2. In addition, larger dust and debris that fall onto the upper surface of the auxiliary plate 10 will slide off due to gravity, reducing the accumulation of dust and debris on its surface and helping to keep the upper surface of the auxiliary plate 10 clean, thus reducing the impact of dust on the heat dissipation efficiency of the heat sink 6.

[0043] A first connecting rod 11 is rotatably connected to the surface of the fixed frame 1 near the controller 2. The first connecting rod 11 is fixedly connected to a drive device controlled by a photosensitive sensor. A photosensitive sensor for monitoring light intensity is installed on the upper surface of the fixed frame 1. The photosensitive sensor drives the first connecting rod 11 to rotate via the drive device. A second connecting rod 12 is rotatably connected to the surface of the fixed frame 1 near the controller 2. A third connecting rod 13 is rotatably connected to the end of the first connecting rod 11 away from the fixed frame 1. The end of the third connecting rod 13 away from the first connecting rod 11 is rotatably connected to the second connecting rod 12. A fourth connecting rod 14 is rotatably connected to the end of the first connecting rod 11 away from the fixed frame 1. A fifth connecting rod 15 is rotatably connected to the end of the second connecting rod 12 away from the fixed frame 1. The end of rod 4 14 furthest from connecting rod 1 11 is rotatably connected to connecting rod 5 15. A baffle 16 is fixedly connected to the lower surface of connecting rod 5 15. The baffle 16 shields the controller 2 to prevent direct exposure to strong light, which would cause the internal temperature of the controller 2 to rise, thereby reducing the operating temperature of the controller 2 and maintaining its normal operating state. This improves the efficiency and stability of the system, reduces the damage to the internal electronic components and external materials of the controller 2 caused by direct exposure to strong light, extends its service life, reduces the interference caused by direct exposure to strong light, improves the stability and accuracy of the controller 2, reduces the failures and damage caused by strong light, reduces the maintenance requirements of the controller 2, and improves the availability of the system.

[0044] Link 2 12 and link 4 14 are parallel to each other during movement, and link 3 13 and link 5 15 are parallel to each other during movement. When the photosensitive sensor drives link 1 11 to rotate through the drive device, it drives link 2 12 and link 5 15 to rotate through link 3 13 and link 4 14 connected to link 1 11. Finally, the baffle 16 fixedly connected to link 5 15 blocks the controller 2 when exposed to strong light.

[0045] The upper surface of the mounting bracket 1 is provided with a sliding groove 17, and a sliding rod 18 is slidably connected inside the sliding groove 17. A cleaning column 19 is fixedly connected to the side of the sliding rod 18 near the controller 2.

[0046] A cleaning block is detachably connected to the lower surface of the cleaning column 19. The cleaning block is attached to the upper surface of the auxiliary plate 10. When the cleaning column 19 moves, the cleaning block connected to the cleaning column 19 cleans away the dust and other impurities adhering to the upper surface of the auxiliary plate 10. This prevents the heat dissipation effect from deteriorating when the heat sink 6 cools the inside of the controller 2 due to the surface of the auxiliary plate 10 being blocked by contaminants. This ensures that the heat sink 6 has good heat conduction, improves the heat dissipation effect on the inside of the controller 2, prevents the inside of the controller 2 from overheating, reduces heat accumulation, reduces the risk of failure of the controller 2 due to overheating, and extends its service life. At the same time, it also helps to reduce short circuits or leakage of the circuit board caused by dust and dirt, and improves the stability and safety of the system.

[0047] A straight groove 20 is provided on the side surface of the slide bar 18 near the baffle 16. A slider 21 is fixedly connected to the side surface of the baffle 16 near the slide bar 18. The slider 21 is slidably connected inside the straight groove 20.

[0048] refer to Figure 8 According to another preferred embodiment of the present invention

[0049] The load protection method based on MPPT controller includes the following steps:

[0050] Step 1: Set the threshold: Install a temperature sensor inside controller 2, and set the overheat protection threshold in the load protection device according to the design and requirements of the MPPT controller.

[0051] Step 2, Temperature Monitoring: The temperature sensor monitors the internal temperature of controller 2 in real time and compares the real-time monitored temperature value with a predefined overheat threshold;

[0052] Step 3, Cooling: When the temperature detected by the temperature sensor exceeds the overheating threshold, the load protection device will automatically trigger the protection mechanism for the MPPT controller, reduce the load power supply, and cool the inside of the controller 2 through the heat sink 6.

[0053] Step 4: Resumption of Operation: When the internal temperature of controller 2 is reduced to a safe range using heat sink 6, controller 2 resumes normal operation.

[0054] In step two above, during temperature monitoring, maintenance personnel need to periodically check and clean the temperature sensor inside controller 2 used for temperature monitoring to avoid inaccurate temperature monitoring inside controller 2 due to sensor malfunction.

[0055] Step 4: After resuming operation, the temperature sensor will continuously monitor the internal temperature of controller 2 to ensure that the temperature remains within a safe range. If the monitored temperature exceeds the overheating threshold again, the load protection device will repeat steps 3 to 4.

[0056] The following is the complete working process and working principle of the above embodiments:

[0057] During use, firstly, the temperature sensor inside controller 2 monitors the internal temperature of controller 2 in real time and compares the real-time monitored temperature value with a predefined overheat threshold. When the temperature sensor detects that the internal temperature of controller 2 exceeds the overheat threshold, the load protection device automatically triggers the protection mechanism for the MPPT controller, reducing the load power supply. The temperature sensor, through the control device, delivers the coolant inside the liquid storage tank 7 to the heat sink 6 via the inlet pipe 8, and then out through the outlet pipe 9. Since the heat sink 6 is attached to the chip 3 inside controller 2, the coolant flowing inside the heat sink 6 can carry away the heat generated by the chip 3 inside controller 2, thus cooling the internal temperature of controller 2. When the internal temperature of controller 2 drops to a safe range, controller 2 resumes normal operation.

[0058] Next, when the photosensitive sensor detects that the light intensity is greater than the preset value, the photosensitive sensor drives the first link 11 to rotate clockwise via the drive device. As the first link 11 rotates, it drives the third link 13 and the fourth link 14 connected to it to rotate. Since the second link 12 and the fourth link 14, as well as the third link 13 and the fifth link 15, are parallel to each other during movement, the rotation of the third link 13 and the fourth link 14 respectively drives the second link 12 connected to the third link 13 and the fifth link 15 connected to the fourth link 14 to rotate closer to the controller 2. The rotation of the fifth link 15 then drives the link 15... The fixedly connected baffle 16 rotates clockwise, shielding the controller 2 from direct sunlight to prevent it from raising the internal temperature of the controller 2. This reduces the operating temperature of the controller 2, maintaining its normal operating condition, thereby improving the system's efficiency and stability. It also reduces the damage to the controller 2's internal electronic components and external materials caused by direct sunlight, extending its service life. Furthermore, it reduces interference from direct sunlight on the controller 2, improving its stability and accuracy. This reduces malfunctions and damage caused by direct sunlight, lowers the maintenance requirements for the controller 2, and improves the system's availability.

[0059] Conversely, when the photosensitive sensor detects that the light intensity is less than the preset value, the photosensitive sensor drives the first link 11 to rotate counterclockwise through the drive device. When the first link 11 rotates, it drives the third link 13 and the fourth link 14 connected to the first link 11 to rotate. Since the second link 12 and the fourth link 14, as well as the third link 13 and the fifth link 15, are all parallel to each other when they move, when the third link 13 and the fourth link 14 rotate, they respectively drive the second link 12 connected to the third link 13 and the fifth link 15 connected to the fourth link 14 to rotate away from the controller 2. When the fifth link 15 rotates, it drives the baffle 16 fixedly connected to the fifth link 15 to rotate counterclockwise. After the baffle 16 rotates counterclockwise, the baffle 16 no longer blocks the controller 2, so that the controller 2 can accurately monitor the output voltage and current of the solar panel in real time, and adjust the operating point of the solar panel according to the maximum power point tracking algorithm to keep it near the maximum power point.

[0060] Finally, when the baffle 16 rotates clockwise, it causes the slider 21, which is fixedly connected to the baffle 16, to move closer to the controller 2. Since the slider 21 is slidably connected to the inside of the straight groove 20 opened on one side surface of the slide rod 18, when the slider 21 moves, it pushes the slide rod 18 closer to the controller 2 by slidingly connecting to the inside of the straight groove 20. When the slide rod 18 moves, it causes the cleaning column 19, which is fixedly connected to the slide rod 18, to move closer to the controller 2. When the cleaning column 19 moves, the cleaning block connected to the cleaning column 19 and the auxiliary plate 1... The upper surface of the auxiliary board 10 is adhered, so the cleaning block can remove dust and other impurities adhering to the upper surface of the auxiliary board 10. This prevents the heat dissipation effect from deteriorating when the heat sink 6 cools the inside of the controller 2 due to the surface of the auxiliary board 10 being blocked by contaminants. It ensures that the heat sink 6 has good heat conduction, improves the heat dissipation effect on the inside of the controller 2, prevents the inside of the controller 2 from overheating, and reduces heat accumulation. This reduces the risk of failure caused by overheating of the controller 2 and extends its service life. At the same time, it also helps to reduce short circuits or leakage of the circuit board caused by dust and dirt, and improves the stability and safety of the system.

[0061] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A load protection device based on an MPPT controller, comprising a mounting bracket (1), a controller (2) fixedly connected to one side surface of the mounting bracket (1), a chip (3) fixedly connected inside the controller (2), a display screen (4) fixedly connected to the side surface of the controller (2) away from the mounting bracket (1), and connection holes (5) uniformly formed on the side surface of the controller (2) away from the mounting bracket (1), characterized in that: The upper surface of the controller (2) is inserted with a heat dissipation plate (6), the lower surface of the heat dissipation plate (6) is attached to the chip (3), the upper surface of the heat dissipation plate (6) extends above the controller (2), the upper surface of the fixed frame (1) is fixedly connected with a liquid storage tank (7), one side of the liquid storage tank (7) close to the heat dissipation plate (6) is respectively communicated with a liquid inlet pipe (8) and a liquid outlet pipe (9), and the liquid inlet pipe (8) and the liquid outlet pipe (9) are communicated with the heat dissipation plate (6) at the end away from the liquid storage tank (7); The surface of the fixed frame (1) close to the controller (2) is rotatably connected with a connecting rod one (11), the surface of the fixed frame (1) close to the controller (2) is rotatably connected with a connecting rod two (12), the end of the connecting rod one (11) away from the fixed frame (1) is rotatably connected with a connecting rod three (13), the end of the connecting rod three (13) away from the connecting rod one (11) is rotatably connected with the connecting rod two (12), the end of the connecting rod one (11) away from the fixed frame (1) is rotatably connected with a connecting rod four (14), the end of the connecting rod two (12) away from the fixed frame (1) is rotatably connected with a connecting rod five (15), the end of the connecting rod four (14) away from the connecting rod one (11) is rotatably connected with the connecting rod five (15), and the lower surface of the connecting rod five (15) is fixedly connected with a baffle (16). The connecting rod two (12) and the connecting rod four (14) are parallel to each other when moving, and the connecting rod three (13) and the connecting rod five (15) are parallel to each other when moving.

2. The MPPT controller based load protection device as claimed in claim 1, wherein: The upper surface of the heat dissipation plate (6) extending above the controller (2) is fixedly connected with an auxiliary plate (10), the auxiliary plate (10) is arranged in an arc shape, and the auxiliary plate (10) shields the connection between the heat dissipation plate (6) and the controller (2).

3. The MPPT controller based load protection device as claimed in claim 2, wherein: The upper surface of the fixed frame (1) is provided with a sliding groove (17), the sliding groove (17) is slidably connected with a sliding rod (18), and the side of the sliding rod (18) close to the controller (2) is fixedly connected with a cleaning column (19).

4. The MPPT controller based load protection device as claimed in claim 3, wherein: The lower surface of the cleaning column (19) is detachably connected with a cleaning block, and the cleaning block is attached to the upper surface of the auxiliary plate (10).

5. The MPPT controller based load protection device as claimed in claim 3, wherein: The side surface of the sliding rod (18) close to the baffle (16) is provided with a straight slot (20), the side surface of the baffle (16) close to the sliding rod (18) is fixedly connected with a sliding block (21), and the sliding block (21) is slidably connected in the straight slot (20).

6. The load protection method based on the MPPT controller, applied to the load protection device based on the MPPT controller in any one of claims 1-5, characterized in that, The method comprises the following steps: Step one, setting threshold value: setting a temperature sensor in the controller (2), and setting an overheat protection threshold value in the load protection device according to the design and requirements of the MPPT controller; Step two, temperature monitoring: the temperature sensor monitors the temperature inside the controller (2) in real time, and compares the real-time monitored temperature value with the predefined overheat threshold value; Step three, cooling treatment: when the temperature monitored by the temperature sensor exceeds the overheat threshold value, the load protection device automatically triggers the protection mechanism of the MPPT controller, reduces the load power supply, and cools down the inside of the controller (2) through the heat dissipation plate (6). Step four, recovery: when the temperature inside the controller (2) is reduced to a safe range using the heat sink (6), the controller (2) resumes normal operation.

7. The method of claim 6, wherein: The step two requires the maintenance personnel to regularly check and clean the temperature sensor set inside the controller (2) for temperature monitoring to avoid inaccurate temperature monitoring of the controller (2) due to failure of the temperature sensor.

8. The method of claim 6, wherein the MPPT controller-based load protection method is characterized by: The step four, after the recovery, the temperature sensor continues to monitor the temperature inside the controller (2) to ensure that the temperature remains within a safe range. If the monitored temperature exceeds the overheat threshold again, the load protection device will repeat steps three to four.

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