Magnetically-connected efficient photovoltaic photo-thermal coupling system

Abstract

The utility model relates to the technical field of solar energy utilization, in particular to a magnetically-connected efficient photovoltaic photo-thermal coupling system, which comprises a semitransparent photovoltaic cell, a photo-thermal reflector and a magnetic mechanism, and is characterized in that the photo-thermal reflector is detachably arranged below the semitransparent photovoltaic cell through the magnetic mechanism; the magnetic attraction mechanism comprises one or more sets of magnetic attraction connecting pieces, each set of magnetic attraction connecting piece comprises a first magnetic part and a second magnetic part, and the first magnetic parts and the second magnetic parts are correspondingly embedded into or pasted to the opposite side faces of the semitransparent photovoltaic cells and the photo-thermal reflectors respectively. The semitransparent photovoltaic cell and the photo-thermal reflector are connected through the magnetic attraction mechanism, compared with a traditional mode, the magnetic attraction connection mode has the advantages of being rapid in installation and free of complex tools, and the installation time is greatly shortened. In addition, heat loss and mechanical abrasion between the photovoltaic cell and the photo-thermal reflecting mirror can be effectively reduced through the integration mode of magnetic attraction connection, and high efficiency of the system in long-term operation is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of solar energy utilization technology, and in particular to a high-efficiency photovoltaic photothermal coupling system with magnetic connection. Background Technology

[0002] In recent years, global energy demand has continued to rise, and the unsustainability of traditional energy sources and the increasingly serious environmental problems have prompted countries to increase their attention and investment in renewable energy. As a clean and green energy source, solar energy has received widespread attention and in-depth research. Among solar energy utilization technologies, photovoltaic power generation and concentrated solar power (CSP) are considered two main development paths, each demonstrating its own advantages in different application scenarios.

[0003] Photovoltaic power generation technology directly converts sunlight into electricity, offering significant advantages such as high efficiency and small footprint. However, when photovoltaic cells are exposed to high temperatures and intense sunlight, their thermal effect leads to a decrease in efficiency, thus limiting their application in high-temperature and extreme environments. In contrast, concentrated solar power (CSP) systems absorb solar radiation heat through collectors and convert it into mechanical energy to drive a generator, exhibiting good energy storage capacity and stable power generation characteristics. However, in environments with weak radiation, CSP systems face the challenge of balancing heat collection efficiency and energy conversion efficiency, affecting the improvement of their overall performance.

[0004] To address the limitations of these two technologies, researchers began exploring the combined application of photovoltaic (PV) and solar thermal technologies, striving to achieve complementary advantages. The PV-thermal coupling system emerged, maximizing the utilization of all wavelengths of solar energy by integrating PV cells and solar thermal reflectors within the same system, thereby improving overall power generation efficiency. In this system, the upper semi-transparent PV cells primarily absorb visible and ultraviolet light for power generation, while the lower solar thermal reflectors reflect infrared light to the collector, completing the solar thermal power generation process. This innovative design not only improves the utilization rate of solar energy but also opens up new prospects for the development of solar power generation technology.

[0005] Despite the immense potential of photovoltaic (PV) photothermal coupling systems in design and implementation, ensuring system integration and stability remains a critical challenge. Traditional connection methods, such as screw fixing and welding, while providing stable connections, are cumbersome to assemble and disassemble and are susceptible to environmental factors like high temperatures and strong winds, which can cause connections to loosen or break, thus affecting the long-term operational stability of the system. Therefore, adopting a convenient, reliable, and efficient connection method is key to improving the performance of PV photothermal coupling systems.

[0006] In view of this, this utility model is proposed. Utility Model Content

[0007] The purpose of this invention is to provide a high-efficiency photovoltaic photothermal coupling system with magnetic connection, which can effectively improve the stability, reliability and overall power generation efficiency of the photovoltaic photothermal coupling system.

[0008] This utility model provides a high-efficiency photovoltaic photothermal coupling system with magnetic connection, including a semi-transparent photovoltaic cell, a photothermal reflector, and a magnetic attraction mechanism. The photothermal reflector is detachably mounted below the semi-transparent photovoltaic cell via the magnetic attraction mechanism. The magnetic attraction mechanism includes one or more sets of magnetic connectors, each set of magnetic connectors including a first magnetic part and a second magnetic part. The first magnetic part and the second magnetic part are respectively attached to the opposite side of the semi-transparent photovoltaic cell and the photothermal reflector.

[0009] As a preferred embodiment of this technical solution, the first magnetic part and the second magnetic part are nested structures;

[0010] Alternatively, either the first magnetic part or the second magnetic part may have a positioning protrusion structure, and the other may have a positioning recess structure.

[0011] In a preferred embodiment of this technical solution, the first magnetic part and the second magnetic part are magnets.

[0012] The magnet includes any one of the following: AlNiCo permanent magnet alloy, IronChromiumCo permanent magnet alloy, permanent magnet ferrite, rare earth cobalt permanent magnet material, and Neodymium Iron Boron permanent magnet material.

[0013] In a preferred embodiment of this technical solution, the first magnetic part and the second magnetic part are magnetic adsorption bands.

[0014] The magnetic adsorption strip is a flexible material embedded with magnetic particles, and the flexible material includes any one of rubber, polymer film and elastic fabric.

[0015] As a preferred embodiment of this technical solution, a flexible gasket is provided on the first magnetic part and / or the second magnetic part, wherein the flexible gasket is made of any one of organosilicon material, polyimide material and special rubber material.

[0016] As a preferred embodiment of this technical solution, the first magnetic part and / or the second magnetic part are provided with mechanical latches.

[0017] The mechanical latch includes any one of the following: pin-type mechanical latch, rotary mechanical latch, and sliding track latch.

[0018] In a preferred embodiment of this technical solution, a plurality of first magnetic parts are alternately embedded or pasted onto the semi-transparent photovoltaic cell or the photothermal reflector, and a plurality of second magnetic parts are correspondingly disposed on the photothermal reflector or the semi-transparent photovoltaic cell at positions corresponding to the first magnetic parts.

[0019] As a preferred embodiment of this technical solution, the magnetic attraction levels of the plurality of first magnetic parts and the plurality of second magnetic parts are different.

[0020] As a preferred embodiment of this technical solution, the surfaces of the first magnetic part and the second magnetic part are coated with a magnetic anti-corrosion layer, which includes any one of nickel coating, zinc coating, tin coating, epoxy resin coating, polyurethane coating and polyester coating.

[0021] As a preferred embodiment of this technical solution, the interface between the semi-transparent photovoltaic cell and the photothermal reflector is further provided with a high-temperature resistant adhesive layer, the material of which includes either epoxy resin or ceramic adhesive.

[0022] The high-efficiency photovoltaic photothermal coupling system with magnetic connection of this utility model has at least the following beneficial effects:

[0023] 1. In the photovoltaic-thermal coupling system of this invention, a magnetic connection mechanism is used to connect the semi-transparent photovoltaic cell and the photothermal reflector. Compared with traditional bolt or welding methods, the magnetic connection method has the advantages of rapid installation and no need for complex tools, greatly shortening the installation time. Experimental data shows that the installation time of this invention is only 40% of that of traditional connection methods. In addition, when system maintenance or disassembly is required, the disassembly process of the magnetic connection is also extremely convenient, improving the system's maintenance efficiency and reducing maintenance time by approximately 30%.

[0024] 2. The magnetic connection integration method of this invention effectively reduces heat loss and mechanical wear between the photovoltaic cell and the photothermal reflector, ensuring the system's high efficiency during long-term operation. In experimental tests, compared with traditional connection methods, the photovoltaic-thermal coupling system of this invention can improve the overall power generation efficiency by approximately 8% under the same environmental conditions. Specifically, in a typical high-temperature and high-radiation environment, the efficiency of the photovoltaic-thermal coupling system of this invention decreases by less than 1% after 1800 hours of continuous operation, indicating that this invention can significantly improve system efficiency during long-term operation.

[0025] Therefore, compared with the prior art, this utility model has significant technical advantages, and can effectively improve the stability, efficiency and reliability of photovoltaic photothermal coupling system, providing an innovative and practical solution for the field of solar power generation. Attached Figure Description

[0026] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the structure of the high-efficiency photovoltaic photothermal coupling system with magnetic connection according to this utility model;

[0028] Figure 2 This is a schematic diagram of the structure of the high-efficiency photovoltaic photothermal coupling system with magnetic connection according to this utility model;

[0029] Figure 3 This is a schematic diagram of the structure of the high-efficiency photovoltaic photothermal coupling system with magnetic connection according to this utility model.

[0030] Explanation of reference numerals in the attached figures:

[0031] 1: Semi-transparent photovoltaic cell; 2: Photothermal reflector; 3: First magnetic part; 4: Second magnetic part; 5: Flexible gasket. Detailed Implementation

[0032] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0033] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0034] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified. Furthermore, the terms "installed," "connected," and "linked" should be interpreted broadly; for example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0035] Example

[0036] like Figure 1-3 As shown, this embodiment provides a high-efficiency photovoltaic photothermal coupling system with magnetic connection, including a semi-transparent photovoltaic cell 1, a photothermal reflector 2, and a magnetic attraction mechanism. The photothermal reflector 2 is detachably disposed below the semi-transparent photovoltaic cell 1 via the magnetic attraction mechanism. The magnetic attraction mechanism includes one or more sets of magnetic connectors. Each set of magnetic connectors includes a first magnetic part 3 and a second magnetic part 4. The first magnetic part 3 and the second magnetic part 4 are respectively embedded or pasted onto one side of the semi-transparent photovoltaic cell 1 and the photothermal reflector 2.

[0037] In the photovoltaic-thermal coupling system of this embodiment, a magnetic attraction mechanism is used to connect the semi-transparent photovoltaic cell 1 and the photothermal reflector 2. The upper semi-transparent photovoltaic cell 1 absorbs visible and ultraviolet light and transmits infrared light to generate photovoltaic power, while the lower photothermal reflector 2 reflects infrared light to the collector for photothermal power generation. Therefore, this photovoltaic-thermal coupling system can fully utilize sunlight. Furthermore, by applying the magnetic connection method to the upper semi-transparent photovoltaic cell 1 and the lower photothermal reflector 2 system, the strong attraction of the first magnetic part 3 and the second magnetic part 4 allows for rapid connection of the semi-transparent photovoltaic cell 1 and the photothermal reflector 2, avoiding the complexity of traditional connection methods and enabling rapid assembly and disassembly of the structure while ensuring the stability and reliability of the connection.

[0038] Specifically, the first magnetic part 3 and the second magnetic part 4 can be embedded or pasted on the edges or four corners of the semi-transparent photovoltaic cell 1 and the photothermal reflector 2, and the size and number of the first magnetic part 3 and the second magnetic part 4 are designed so that the magnetic force is sufficient to withstand the influence of wind, temperature fluctuations and equipment vibration on the connection.

[0039] It should be noted that the first magnetic part 3 or the second magnetic part 4 can only be pasted on the surface of the semi-transparent photovoltaic cell 1 and cannot be embedded, so as not to damage the semi-transparent photovoltaic cell 1; the second magnetic part 4 can be pasted or embedded on the surface of the photothermal reflector 2.

[0040] Based on the above technical solution, in order to further enable the semi-transparent photovoltaic cell 1 and the photothermal reflector 2 to automatically align and fix themselves when they are close, the first magnetic part 3 and the second magnetic part 4 have a certain self-positioning function. For example, the first magnetic part 3 and the second magnetic part 4 can be designed as a nested structure, or any one of the first magnetic part 3 and the second magnetic part 4 has a positioning protrusion structure and the other has a positioning recess structure, so as to avoid the components being misaligned due to external force during the magnetic attraction process.

[0041] In this embodiment, the first magnetic part 3 and the second magnetic part 4 are magnets, including any one of AlNiCo permanent magnet alloy, IronChromiumCo permanent magnet alloy, permanent magnet ferrite, rare earth cobalt permanent magnet material and Neodymium Iron Boron permanent magnet material.

[0042] The first magnetic part 3 and the second magnetic part 4 use ordinary magnets, requiring no external power source and avoiding electrical problems. They are simply embedded or pasted onto the upper photovoltaic cell and the lower photothermal reflector 2, respectively, to serve as the first magnetic part 3 and the second magnetic part 4. The shape, size, and number of the first magnetic part 3 and the second magnetic part 4 are designed according to the required attractive force. For example, the first magnetic part 3 can be embedded or pasted onto the edge or four corners of the photovoltaic cell, while the second magnetic part 4 can be embedded or pasted into corresponding adsorption areas on the photothermal reflector 2. Furthermore, multiple first magnetic parts 3 can be alternately embedded or pasted onto the semi-transparent photovoltaic cell 1 and the photothermal reflector 2, while multiple second magnetic parts 4 are correspondingly positioned on the photothermal reflector 2 and the semi-transparent photovoltaic cell 1 at positions corresponding to the first magnetic parts 3.

[0043] In another specific embodiment of this utility model, the first magnetic part 3 and the second magnetic part 4 may also be magnetic adsorption strips or magnetic adsorption sheets. The magnetic adsorption strips or magnetic adsorption sheets are flexible materials embedded with magnetic particles. The flexible materials include any one of rubber, polymer film and elastic fabric.

[0044] When the first magnetic part 3 and the second magnetic part 4 are magnetic adsorption strips or magnetic adsorption sheets, the semi-transparent photovoltaic cell 1 is connected to the photothermal reflector 2 using magnetic adsorption strips or magnetic adsorption sheets. The design of magnetic adsorption strips or magnetic adsorption sheets is flexible and can be used for magnetic connection of lightweight or small equipment, as well as equipment that needs to be frequently replaced or repaired. They can not only complete the equipment installation quickly, but also provide sufficient connection stability.

[0045] Specifically, the magnetic adsorption tape or magnetic adsorption sheet can be any of the following: a flexible material with embedded magnetic particles, such as rubber, polymer film, or elastic fabric (a soft material composed of fibers and elastic yarns, which can serve as a covering layer or substrate for the magnetic adsorption tape). This magnetic adsorption tape is then attached to the contact surfaces of the back of the semi-transparent photovoltaic cell 1 and the photothermal reflector 2, allowing for easy installation and removal, ensuring quick and secure connection during the connection process. During removal, only a slight pull or tearing of the magnetic adsorption tape is required.

[0046] Therefore, the magnetic adsorption tape connection method not only makes the connection and disassembly of the semi-transparent photovoltaic cell 1 and the photothermal reflector 2 extremely convenient, but also, as a flexible material, the magnetic adsorption tape effectively avoids surface damage caused by traditional fixing methods.

[0047] Based on the above technical solution, more preferably, a flexible gasket 5 is provided on the first magnetic part 3 and / or the second magnetic part 4, and the flexible gasket 5 is made of any one of organosilicon material, polyimide material and special rubber material.

[0048] Flexible pads 5, such as silicone or rubber, are provided on the first magnetic part 3 and / or the second magnetic part 4. These pads provide a certain buffering effect during magnetic attraction, absorbing stress caused by vibration or temperature changes. In practical applications, the hardness and elasticity of the flexible pads 5 can be designed to ensure that the photovoltaic cells and the photothermal reflector 2 do not generate excessive mechanical stress during installation and use.

[0049] In addition to providing flexible pads 5 on the first magnetic part 3 and / or the second magnetic part 4, the elastic first magnetic part 3 and the second magnetic part 4 can also be directly selected as the connection medium, making the connection between the photovoltaic cell and the photothermal reflector 2 more stable. The elastic first magnetic part 3 and the second magnetic part 4 can adapt to different working temperature changes, avoiding misalignment of the contact surface or loosening of the connection due to thermal expansion.

[0050] The use of the flexible gasket 5 or the elastic first magnetic part 3 and the second magnetic part 4 of this utility model can effectively reduce the impact of external vibration on the connection and maintain connection stability in high temperature environments, making it suitable for high temperature conditions in solar thermal systems.

[0051] More preferably, based on the above technical solution, the first magnetic part 3 and / or the second magnetic part 4 are also provided with mechanical latches, which can effectively prevent the rotation and displacement of the components under high wind speed conditions.

[0052] The mechanical locking mechanism includes some or all of the following structures:

[0053] 1. Locking components

[0054] Pin-type structure: includes a movable pin and a slot that matches the pin, with the pin inserted into the slot to achieve mechanical locking.

[0055] Rotary latch: Similar to the pin-type structure, it includes a movable pin and a latch that matches the pin. The latch engages by rotating the pin at a certain angle within the latch.

[0056] 2. Dating components:

[0057] This includes grooves and slots that mate with the surface of magnetic connectors or frames.

[0058] The mating surfaces have a high-precision fit structure to ensure a stable connection.

[0059] 3. Flexible reset mechanism:

[0060] It includes a spring or other elastic element for automatic reset locking components.

[0061] 4. Locking adjustment device (optional):

[0062] Threaded locking structure: The tightness of the lock can be adjusted by bolts or nuts.

[0063] Quick-locking mechanism: Enables quick installation and disassembly through a snap-fit ​​clamping structure.

[0064] The specific types of latches include the following:

[0065] 1. Pin-type mechanical lock

[0066] The pin can slide vertically and be inserted into the corresponding slot. The top of the pin is equipped with an elastic return spring, which can automatically reset after being pulled out.

[0067] The pin and the slot are respectively installed on the side edges of the first magnetic part 3 and the second magnetic part 4.

[0068] 2. Rotary mechanical locking mechanism

[0069] It includes a locking plate with an opening and a rotating latch, wherein the end of the locking plate away from the opening is fixed to the side of the first magnetic part 3, and the rotating latch is rotatably fixed to the side of the second magnetic part 4, and corresponds to the position of the locking plate after the first magnetic part 3 and the second magnetic part 4 are magnetically connected.

[0070] The lock engages by rotating it within the opening in the locking plate.

[0071] 3. Sliding track locking

[0072] The first magnetic part 3 is equipped with a sliding track, and the second magnetic part 4 is equipped with a locking slider. After the locking slider moves along the sliding track to a designated position, it is locked by a pin.

[0073] Installed on the sides of the first magnetic part 3 and the second magnetic part 4.

[0074] 4. Magnetic auxiliary locking

[0075] It includes multiple sets of small magnets, with one small magnet in each set disposed on the side of the first magnetic part 3 and another small magnet disposed on the side of the second magnetic part 4, and corresponding to the small magnet on the first magnetic part 3 after the first magnetic part 3 and the second magnetic part 4 are magnetically connected.

[0076] The different latches mentioned above can be provided in one or more according to the size and shape of the first magnetic part 3 and the second magnetic part 4. For example, one or more latches can be provided around the side of the first magnetic part 3 and the second magnetic part 4.

[0077] Mechanical latches must possess high strength and weather resistance to withstand high wind speeds and extreme temperature variations. The main body of the latch is made of high-strength alloy steel or aluminum alloy, providing excellent strength and corrosion resistance; the elastic element is a stainless steel spring or engineering plastic spring for automatic reset; and the sliding parts are coated with polytetrafluoroethylene (PTFE) to reduce frictional losses.

[0078] Furthermore, based on the stress characteristics of the semi-transparent photovoltaic cell 1 and the photothermal reflector 2, as well as the temperature fluctuations in different regions, different levels of the first magnetic part 3 and the second magnetic part 4 can be designed for precise arrangement.

[0079] For example, in high-temperature areas of the system (such as areas near the surface of the photothermal reflector 2), magnets with low magnetic attraction force are used. These areas are heated more, so the magnetic attraction force needs to be adjusted appropriately according to the temperature to avoid excessive attraction force causing the components to be deformed under pressure.

[0080] In areas with minimal temperature variation (such as the middle or bottom areas), use magnets with a moderate magnetic force level. These areas can maintain a high level of magnetic force, ensuring the overall connection is secure.

[0081] In low-temperature regions of the system (such as near the external air contact surface or in the shade), magnets with a higher magnetic attraction level are used to ensure structural stability in cold environments.

[0082] For example, the force point of the photothermal reflector 2 is usually in the more central part, so a magnet with a higher attraction level can be selected, while a magnet with a lower attraction level is used in the edge part.

[0083] Based on the above technical solution, in order to further ensure the stable operation of the system, multiple redundant magnets can be set on the connection surface of the semi-transparent photovoltaic cell 1 and the photothermal reflector 2 to ensure the stability of the magnetic attraction force.

[0084] Based on the above technical solution, and more preferably, the surfaces of the first magnetic part 3 and the second magnetic part 4 are coated with a magnetic anti-corrosion layer, which includes any one of nickel coating, zinc coating, tin coating, epoxy resin coating, polyurethane coating and polyester coating, to enhance their high temperature resistance and corrosion resistance.

[0085] In another specific embodiment of this utility model, a high-temperature resistant adhesive layer is provided at the interface between the semi-transparent photovoltaic cell 1 and the photothermal reflector 2 to ensure that the two are stably connected in a high-temperature environment.

[0086] In summary, this invention has significant technical advantages over existing technologies, effectively improving the stability, efficiency, and reliability of photovoltaic-thermal coupling systems, and providing an innovative and practical solution for the field of solar power generation.

[0087] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A high-efficiency photovoltaic-thermal coupling system with magnetic connection, characterized in that, It includes a semi-transparent photovoltaic cell (1), a photothermal reflector (2), and a magnetic attraction mechanism. The photothermal reflector (2) is detachably mounted below the semi-transparent photovoltaic cell (1) via the magnetic attraction mechanism. The magnetic attraction mechanism includes one or more sets of magnetic connectors. Each set of magnetic connectors includes a first magnetic part (3) and a second magnetic part (4). The first magnetic part (3) and the second magnetic part (4) are respectively embedded or pasted on one side opposite to the semi-transparent photovoltaic cell (1) and the photothermal reflector (2).

2. The high-efficiency photovoltaic-thermal coupling system according to claim 1, characterized in that, The first magnetic part (3) and the second magnetic part (4) are nested structures; Alternatively, either the first magnetic part (3) or the second magnetic part (4) may have a positioning protrusion structure, and the other may have a positioning recess structure.

3. The high-efficiency photovoltaic-thermal coupling system according to claim 1, characterized in that, The first magnetic part (3) and the second magnetic part (4) are magnets. The magnet includes any one of the following: AlNiCo permanent magnet alloy, IronChromiumCo permanent magnet alloy, permanent magnet ferrite, rare earth cobalt permanent magnet material, and Neodymium Iron Boron permanent magnet material.

4. The high-efficiency photovoltaic-thermal coupling system according to claim 1, characterized in that, The first magnetic part (3) and the second magnetic part (4) are magnetic adsorption bands. The magnetic adsorption strip is a flexible material embedded with magnetic particles, and the flexible material includes any one of rubber, polymer film and elastic fabric.

5. The high-efficiency photovoltaic-thermal coupling system according to claim 1, characterized in that, A flexible gasket (5) is provided on the first magnetic part (3) and / or the second magnetic part (4), and the flexible gasket (5) is made of any one of organosilicon material, polyimide material and special rubber material.

6. The high-efficiency photovoltaic-thermal coupling system according to claim 1, characterized in that, Mechanical latches are provided on the first magnetic part (3) and / or the second magnetic part (4). The mechanical latch includes any one of the following: pin-type mechanical latch, rotary mechanical latch, and sliding track latch.

7. The high-efficiency photovoltaic-thermal coupling system according to claim 1, characterized in that, Multiple first magnetic parts (3) are alternately embedded or pasted on the semi-transparent photovoltaic cell (1) or the photothermal reflector (2), and multiple second magnetic parts (4) are correspondingly disposed on the photothermal reflector (2) or the semi-transparent photovoltaic cell (1) at positions corresponding to the first magnetic parts (3).

8. The high-efficiency photovoltaic-thermal coupling system according to claim 1, characterized in that, The magnetic attraction levels of the plurality of first magnetic parts (3) and the plurality of second magnetic parts (4) are different.

9. The high-efficiency photovoltaic-thermal coupling system according to claim 1, characterized in that, The surfaces of the first magnetic part (3) and the second magnetic part (4) are coated with a magnetic anti-corrosion layer, which includes any one of nickel coating, zinc coating, tin coating, epoxy resin coating, polyurethane coating and polyester coating.

10. The high-efficiency photovoltaic-thermal coupling system according to claim 1, characterized in that, The interface between the semi-transparent photovoltaic cell (1) and the photothermal reflector (2) is further provided with a high-temperature resistant adhesive layer, the material of which includes either epoxy resin or ceramic adhesive.

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