A high conversion efficiency photovoltaic module

Abstract

The utility model discloses a kind of high-efficiency conversion efficiency photovoltaic modules, including photovoltaic bottom plate and the EVA bottom film of being arranged at the top outer wall of photovoltaic bottom plate, the top of the EVA bottom film is provided with photovoltaic cell piece, the top of the photovoltaic cell piece is provided with EVA top film, the bottom end outer wall center of the photovoltaic bottom plate is fixed with junction box, the inside of the center of the photovoltaic bottom plate is provided with wire hole, wire is inserted in the wire hole, by increasing novel adjustable weight-increasing wind resistance device in the bottom end of photovoltaic bottom plate, the wind resistance of photovoltaic module can be effectively improved, multiple solid cast iron counterweight discs are stacked on the placing bottom plate, the stability under strong wind is enhanced by the weight of itself increasing component down pressure, reduce the risk of being blown or overturn, guarantee safe operation, device counterweight adjustment is flexible, counterweight disc is sleeved in the thick soft steel wire rope outside by sleeve hole, can be different regional wind, installation environment etc. Demand, increase or decrease quantity realizes counterweight accurate adjustment, ensure that wind resistance effect and use scene match.

Description

Technical Field

[0001] This utility model belongs to the field of photovoltaic related technology, specifically relating to a high-efficiency photovoltaic module. Background Technology

[0002] With the continuous growth of global demand for clean energy, photovoltaic (PV) power generation technology has developed rapidly and been widely applied. As the core component of a PV power generation system, the operational stability and conversion efficiency of PV modules directly affect the overall power generation efficiency of the power plant. However, in practical applications, PV modules often face damage from severe weather conditions such as strong winds. Currently, most PV modules are installed in open outdoor areas, such as rooftops, deserts, and mountains, where wind speeds are often high and wind direction is variable. While traditional PV module installation methods can meet basic installation requirements, under strong winds, the modules are prone to swaying, displacement, and even overturning. This not only damages the internal structure of the modules, affecting their photoelectric conversion efficiency, but may also cause safety accidents due to module falls, increasing operation and maintenance costs. Meanwhile, wind speeds and topography vary significantly across different regions, leading to different wind resistance requirements for photovoltaic modules. Existing wind resistance measures for photovoltaic modules lack flexibility and cannot be tailored to specific environmental needs. For example, some modules use fixed-weight counterweight devices, which are insufficient to meet wind resistance requirements under varying wind conditions; while some devices can adjust the counterweight, the adjustment process is cumbersome and inconvenient, and there are limitations in adjusting the height and weight of the counterweight, making it impossible to ensure the module remains stable under all operating conditions. Utility Model Content

[0003] The purpose of this invention is to provide a high-efficiency photovoltaic module to address the problem mentioned in the background art that most photovoltaic modules are installed in open outdoor areas such as rooftops and deserts, where winds are strong and direction is changeable. Although traditional installation and fixing methods can meet basic requirements, the modules are prone to swaying, displacement, or even overturning in strong winds, which not only damages the internal structure and affects the conversion efficiency, but may also cause safety accidents and increase operation and maintenance costs.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a high-efficiency photovoltaic module, comprising a photovoltaic substrate and an EVA bottom film disposed on the outer wall of the top of the photovoltaic substrate, a photovoltaic cell disposed on the top of the EVA bottom film, an EVA top film disposed on the top of the photovoltaic cell, a junction box fixed at the center of the bottom outer wall of the photovoltaic substrate, a wire hole disposed inside the center of the photovoltaic substrate, a wire inserted through the wire hole, and the junction box electrically connected to the photovoltaic cell through the wire, and an adjustable weight-adding wind-resistant device disposed below the junction box.

[0005] Preferably, the adjustable weight-adding wind-resistant device includes an internally threaded fixing cylinder, a soft steel wire connecting rope, welding plates, and threaded fixing heads. Four welding plates are equidistantly welded to the outer side of the center of the bottom outer wall of the photovoltaic base plate, and the four welding plates are respectively close to the four corners of the photovoltaic base plate. A threaded fixing head is welded to the bottom end of each of the four welding plates. An internally threaded fixing cylinder is threaded onto the outside of each of the four threaded fixing heads. A soft steel wire connecting rope is welded to the bottom end of each of the four internally threaded fixing cylinders.

[0006] Preferably, the adjustable weight-increasing wind-resistant device further includes a metal connecting plate, a thickened locking sleeve, a thickened soft steel wire rope, and a rope height locking screw. The metal connecting plate is located below the center of the junction box. The four soft steel wire ropes are all fixedly connected to the circular outer wall of the metal connecting plate by welding. A through hole is provided inside the center of the metal connecting plate. A thickened locking sleeve is welded to the bottom end of the metal connecting plate. A thickened soft steel wire rope is inserted into the thickened locking sleeve and the through hole. A rope height locking screw is threaded into the center of both the left and right ends of the thickened locking sleeve through a screw hole.

[0007] Preferably, the four soft steel wire connecting ropes can suspend the metal connecting plate below the center of the photovoltaic base plate. After the suspension rope height locking screws are loosened, the thickened soft steel wire suspension rope can move up and down in the thickened locking sleeve and through hole to flexibly adjust the downward suspension length of the thickened soft steel wire suspension rope. After both suspension rope height locking screws are tightened, they can be pressed tightly against the left and right ends of the thickened soft steel wire suspension rope through the screw rods to prevent the thickened soft steel wire suspension rope from moving up and down.

[0008] Preferably, the adjustable weight-increasing wind-resistant device further includes a counterweight disc and a base plate. The bottom end of the thickened soft steel wire rope is welded to the base plate, and multiple counterweight discs are stacked on the base plate. The counterweight discs are solid cast iron discs.

[0009] Preferably, the counterweight disc has a sleeve hole at its center, and the counterweight disc is sleeved on the outside of the thickened soft steel wire rope through the sleeve hole. The number of counterweight discs can be increased or decreased on the thickened soft steel wire rope according to the counterweight requirements.

[0010] Preferably, a spectral conversion film is provided at the top of the EVA top film, and a low-reflection encapsulation glass is provided at the top of the spectral conversion film. The low-reflection encapsulation glass is formed by applying multiple anti-reflection films to the surface of the encapsulation glass using a coating process to reduce light reflection loss.

[0011] Preferably, an aluminum alloy frame is also fitted onto the outer side of the bottom end of the photovoltaic base plate. The inner walls of the aluminum alloy frame are connected with recessed fitting grooves. The aluminum alloy frame is fitted onto the outside of the EVA bottom film, photovoltaic cell, EVA top film, spectral conversion film and low-reflection encapsulation glass through the fitting grooves. The inner wall at the top of the fitting groove and the outer wall at the top of the low-reflection encapsulation glass are waterproofed and sealed with encapsulating adhesive.

[0012] Preferably, the connection between the photovoltaic base plate and the aluminum alloy frame is fixed and waterproofed by silicone sealing. U-shaped mounting sleeves are provided on the outer wall of the bottom of the photovoltaic base plate near the four corners. After multiple U-shaped mounting sleeves are fitted onto the outside of the top of the photovoltaic bracket, they are fixed to the photovoltaic bracket by screws.

[0013] Compared with the prior art, this utility model provides a high-efficiency photovoltaic module with the following advantages: This invention adds a novel adjustable weight-adding wind-resistant device to the bottom of a photovoltaic panel. Through a rational structural design, this device effectively enhances the wind resistance of the photovoltaic module. Multiple solid cast iron counterweight discs are stacked on the base plate, using their own weight to increase the overall downward pressure on the photovoltaic module. This significantly enhances the stability of the module in strong winds, reducing the risk of being blown away or overturned, and ensuring the safe operation of the module. Simultaneously, the device has a flexible counterweight adjustment function. The counterweight discs are fitted onto the thickened soft steel wire rope through holes. The number of counterweight discs can be easily increased or decreased according to the wind force level in different regions and the actual needs of the photovoltaic module's installation environment, achieving precise adjustment of the counterweight weight and ensuring that the wind resistance effect matches the usage scenario. Most importantly, the lowering length of the thickened soft steel wire rope can be adjusted and locked by the rope height locking screw. This allows the counterweight height of the counterweight disc to be changed according to actual usage needs, and the placement base plate can be directly placed against the ground. This reduces the amplitude of swaying. When the placement base plate is against the ground, the force of the counterweight is transmitted to the ground more directly, further improving the stability of the component. When it is necessary to adjust the height to adapt to different installation scenarios or ground conditions, simply loosen the rope height locking screw, adjust the length of the thickened soft steel wire rope, and then lock it again. The operation is convenient and efficient. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of a high-efficiency photovoltaic module in disassembled state according to the present invention.

[0015] Figure 2 This is a three-dimensional structural diagram of a high-efficiency photovoltaic module in its assembly state according to the present invention.

[0016] Figure 3This is a schematic diagram of the right-side plan view of a high-efficiency photovoltaic module according to the present invention.

[0017] Figure 4 This is a bottom-view three-dimensional structural diagram of the adjustable weight-adding wind-resistant device of this utility model.

[0018] Figure 5 This is a three-dimensional disassembly diagram of the adjustable weight-adding wind-resistant device of this utility model.

[0019] In the diagram: 1. Aluminum alloy frame; 2. EVA bottom film; 3. Photovoltaic cell; 4. EVA top film; 5. Spectrum conversion film; 6. Low-reflection encapsulation glass; 7. Photovoltaic base plate; 8. Adjustable weight-adding wind-resistant device; 9. U-shaped mounting sleeve; 10. Junction box; 11. Internal threaded fixing cylinder; 12. Soft steel wire connecting rope; 13. Metal connecting plate; 14. Thickened locking sleeve; 15. Thickened soft steel wire suspension rope; 16. Counterweight disc; 17. Placement base plate; 18. Welding piece; 19. Suspension rope height locking screw; 20. Threaded fixing head. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] This utility model provides, for example Figure 1-5 The photovoltaic module shown features a scientifically designed and tightly integrated layout of its components, playing a crucial role in improving power generation efficiency, ensuring module performance, and extending service life. The photovoltaic base plate 7 serves as the module's fundamental support structure. Its top outer wall is fitted with an EVA bottom film 2, which possesses excellent adhesion and sealing properties, firmly fixing the photovoltaic cells 3 to the base plate 7 while isolating them from external moisture and impurities, providing a dry and clean working environment for the cells 3. The EVA bottom film 2's thermal melting properties allow it to melt during the module encapsulation process, tightly wrapping the photovoltaic cells 3, enhancing the module's overall structural integrity and effectively buffering the impact of external shocks on the cells 3. The photovoltaic cells 3, located at the top of the EVA bottom film 2, are the core component for achieving light-to-electricity conversion. The top EVA film 4, along with the bottom EVA film 2, works together to provide comprehensive protection for the photovoltaic cells 3 from both top and bottom, further enhancing the module's sealing and structural stability. The EVA material's excellent light transmittance minimizes the absorption and reflection of sunlight, ensuring that more light reaches the surface of the photovoltaic cells 3, providing ample light for efficient photoelectric conversion.

[0022] like Figure 1 , Figure 2 and Figure 3 As shown, the spectral conversion film 5 set at the top of the EVA top film 4 can convert ultraviolet light and other light that cannot be directly utilized by the photovoltaic cell 3 in sunlight into visible light that can be absorbed, thus broadening the range of solar spectrum utilization by the photovoltaic cell 3 and improving the photoelectric conversion efficiency. This principle of achieving spectral optimization through material modification is one of the important technical means to improve the conversion efficiency of the module. The low-reflection encapsulation glass 6 at the top of the spectral conversion film 5 has a multi-layer anti-reflection film set on its surface using a coating process. Utilizing the principle of light interference, the multi-layer anti-reflection film can effectively reduce the reflection loss of sunlight on the glass surface, allowing more light to penetrate the glass and enter the module, where it is absorbed and utilized by the photovoltaic cell 3, further improving the module's utilization rate of light energy. This is one of the key designs for improving the conversion efficiency of photovoltaic modules.

[0023] like Figure 1 , Figure 2 and Figure 3 As shown, the aluminum alloy frame 1, which is fitted onto the bottom of the photovoltaic base plate 7, has recessed grooves on its inner walls that perfectly fit the outer contours of the EVA bottom film 2, photovoltaic cells 3, EVA top film 4, spectral conversion film 5, and low-reflection encapsulation glass 6. These core components are tightly wrapped together through this fitting method, forming a robust overall structure that significantly improves the module's impact resistance and mechanical strength. Simultaneously, the inner wall at the top of the groove and the outer wall at the top of the low-reflection encapsulation glass 6 are sealed with waterproof adhesive. Combined with the silicone sealant used at the connection points between the photovoltaic base plate 7 and the aluminum alloy frame 1, a double waterproof barrier is constructed. This effectively prevents rainwater and dew from seeping into the module, avoiding short circuits and other malfunctions caused by moisture in the photovoltaic cells 3, thus ensuring the stability of the module's electrical performance and its lifespan. The U-shaped mounting sleeves 9 located near the four corners of the bottom outer wall of the photovoltaic base plate 7 are... Matching the top of the photovoltaic bracket, the module is fitted onto the outside of the photovoltaic bracket and fixed with screws. This installation method is not only simple to operate and can quickly complete the connection and fixation between the module and the bracket, but the U-shaped structure also makes the connection between the module and the bracket more secure. It can effectively resist the shaking or displacement of the module caused by external forces such as wind, ensuring that the module maintains a stable installation state in complex outdoor environments. The junction box 10 fixed at the center of the bottom outer wall of the photovoltaic base plate 7 is electrically connected to the photovoltaic cell 3 through the wires inserted in the wire holes in the center of the photovoltaic base plate 7. As the electrical connection hub of the module, the junction box 10 can collect the electrical energy generated by the photovoltaic cell 3 and output it outward. Its position at the center of the bottom of the photovoltaic base plate 7 facilitates the layout and connection of wires and avoids the junction box 10 being directly exposed to sunlight, reducing the impact of high temperature on the performance of electrical components and ensuring the stability and safety of power output.

[0024] like Figure 1 , Figure 4 and Figure 5 As shown, an adjustable weight-adding wind-resistant device 8 is installed below the junction box 10. The adjustable weight-adding wind-resistant device 8 has a sophisticated structural design and a reasonable distribution of its components, playing a crucial role in enhancing the wind resistance stability of the photovoltaic module. The adjustable weight-adding wind-resistant device 8 includes an internally threaded fixing cylinder 11, a soft steel wire connecting rope 12, welding plates 18, and a threaded fixing head 20. Four welding plates 18 are equidistantly welded to the outer side of the center of the bottom outer wall of the photovoltaic base plate 7, with each of the four welding plates 18 positioned near one of the four corners of the photovoltaic base plate 7. This symmetrical distribution at the four corners ensures even force distribution, preventing deformation of the photovoltaic base plate 7 or loosening of connections due to excessive force at a single point. Each of the four threaded fixing heads 18 is welded to a threaded fixing head 20 at its bottom. Each of the four threaded fixing heads 20 is threaded with an internal threaded fixing sleeve 11. The threaded connection not only facilitates the installation and disassembly of the device, but also allows for adjustment of the connection length between the internal threaded fixing sleeve 11 and the threaded fixing head 20 by rotating the internal threaded fixing sleeve 11. This allows for fine adjustment of the tension of the soft steel wire connecting rope 12, ensuring the overall stability of the device. The soft steel wire connecting rope 12 is welded to the bottom of each of the four internal threaded fixing sleeves 11. The soft steel wire connecting rope 12 has high strength and good flexibility, and can withstand the weight of the counterweight while adapting to a certain degree of external pulling force, reducing the risk of breakage caused by rigid connection of the device.

[0025] like Figure 1 , Figure 4 and Figure 5As shown, the adjustable weight-adding wind-resistant device 8 also includes a metal connecting plate 13, a thickened locking sleeve 14, a thickened soft steel wire rope 15, and a rope height locking screw 19. The metal connecting plate 13 is located below the center of the junction box 10, directly below the center of gravity of the photovoltaic module, which allows the counterweight force to be evenly transmitted to the photovoltaic base plate 7, preventing the module from swaying due to force shift. The four soft steel wire ropes 12 are all fixedly connected to the circular outer wall of the metal connecting plate 13 by welding. The welding process ensures the firmness of the connection and effectively prevents the soft steel wire ropes 12 from detaching from the metal connecting plate 13, ensuring the stability of the suspension structure. A through hole is provided in the center of the metal connecting plate 13. A thickened locking sleeve 14 is welded to the bottom of the metal connecting plate 13. The thickened soft steel wire rope 15 is inserted into the thickened locking sleeve 14 and the through hole. Compared with ordinary ropes, the thickened soft steel wire rope 15 is more powerful. The rope has a higher load-bearing capacity and can stably support the weight of the counterweight disc 16. The thickened locking sleeve 14 enhances the structural strength of the connection between the metal connecting plate 13 and the thickened soft steel wire rope 15, reducing wear. The center of both ends of the thickened locking sleeve 14 is threaded with rope height locking screws 19. After the rope height locking screws 19 are loosened, the thickened soft steel wire rope 15 can move up and down in the thickened locking sleeve 14 and the through hole to flexibly adjust the downward suspension length of the thickened soft steel wire rope 15 to meet the needs of counterweight height in different scenarios. After both rope height locking screws 19 are tightened, they can be pressed tightly against the left and right ends of the thickened soft steel wire rope 15 through the screw rods, using friction to prevent the thickened soft steel wire rope 15 from moving up and down, ensuring that the counterweight height is fixed. This design adopts the mechanical locking principle, which is simple to operate and reliable in locking.

[0026] like Figure 1 , Figure 4 and Figure 5 As shown, the adjustable weight-adding wind-resistant device 8 also includes a counterweight disc 16 and a base plate 17. The base plate 17 is welded to the bottom end of the thickened soft steel wire rope 15. The base plate 17 provides a stable support surface for the counterweight disc 16, and multiple counterweight discs 16 are stacked on the base plate 17. The counterweight disc 16 is a solid cast iron disc. Cast iron has a high density and can provide a large weight in a small volume, effectively increasing the overall weight of the photovoltaic module and improving wind resistance. A sleeve hole is provided in the center of the counterweight disc 16, and the counterweight disc 16 is sleeved on the outside of the thickened soft steel wire rope 15 through the sleeve hole. The sleeve hole design allows the counterweight disc 16 to be quickly put on or taken off. The number of counterweight discs 16 can be increased or decreased on the thickened soft steel wire rope 15 according to the weight requirements, realizing flexible adjustment of the weight and adapting to different wind levels. This modular design greatly improves the practicality and adaptability of the device.

[0027] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A high-efficiency photovoltaic module, comprising a photovoltaic substrate (7) and an EVA bottom film (2) disposed on the outer wall of the top of the photovoltaic substrate (7), wherein a photovoltaic cell (3) is disposed on the top of the EVA bottom film (2), and an EVA top film (4) is disposed on the top of the photovoltaic cell (3), characterized in that: A junction box (10) is fixed at the center of the outer wall of the bottom of the photovoltaic base plate (7). A wire hole is provided inside the center of the photovoltaic base plate (7). A wire is inserted into the wire hole. The junction box (10) is electrically connected to the photovoltaic cell (3) through the wire. An adjustable weight-adding wind-resistant device (8) is provided below the junction box (10). The adjustable weight-increasing wind-resistant device (8) includes an internal threaded fixing cylinder (11), a soft steel wire connecting rope (12), welding pieces (18) and a threaded fixing head (20). Four welding pieces (18) are welded at equal intervals on the outer side of the center of the bottom outer wall of the photovoltaic base plate (7), and the four welding pieces (18) are respectively close to the four corners of the photovoltaic base plate (7). The bottom ends of the four welding pieces (18) are all welded with threaded fixing heads (20), and the four threaded fixing heads (20) are all threadedly fitted with internal threaded fixing cylinders (11). The bottom ends of the four internal threaded fixing cylinders (11) are all welded with soft steel wire connecting ropes (12).

2. The high-efficiency photovoltaic module according to claim 1, characterized in that: The adjustable weight-increasing wind-resistant device (8) also includes a metal connecting plate (13), a thickened locking sleeve (14), a thickened soft steel wire rope (15), and a rope height locking screw (19). The metal connecting plate (13) is located below the center of the junction box (10). The four soft steel wire connecting ropes (12) are fixedly connected to the circular outer wall of the metal connecting plate (13) by welding. A through hole is provided inside the center of the metal connecting plate (13). A thickened locking sleeve (14) is welded to the bottom of the metal connecting plate (13). A thickened soft steel wire rope (15) is inserted into the through hole of the thickened locking sleeve (14). A rope height locking screw (19) is threaded into the center of both the left and right ends of the thickened locking sleeve (14) through a screw hole.

3. A high-efficiency photovoltaic module according to claim 2, characterized in that: The four soft steel wire connecting ropes (12) can suspend the metal connecting plate (13) below the center of the photovoltaic base plate (7). After the suspension rope height locking screw (19) is loosened, the thickened soft steel wire suspension rope (15) can move up and down in the thickened locking sleeve (14) and the through hole to flexibly adjust the length of the thickened soft steel wire suspension rope (15) suspended downward. After both suspension rope height locking screws (19) are tightened, they can be pressed tightly on the left and right ends of the thickened soft steel wire suspension rope (15) through the screw rods to prevent the thickened soft steel wire suspension rope (15) from moving up and down.

4. A high-efficiency photovoltaic module according to claim 3, characterized in that: The adjustable weight-increasing wind-resistant device (8) also includes a counterweight disc (16) and a base plate (17). The bottom end of the thickened soft steel wire rope (15) is welded to the base plate (17), and multiple counterweight discs (16) are stacked on the base plate (17). The counterweight discs (16) are solid cast iron discs.

5. A high-efficiency photovoltaic module according to claim 4, characterized in that: The counterweight disc (16) has a sleeve hole at its center, and the counterweight disc (16) is sleeved on the outside of the thickened soft steel wire rope (15) through the sleeve hole. The number of counterweight discs (16) can be increased or decreased on the thickened soft steel wire rope (15) according to the counterweight requirements.

6. A high-efficiency photovoltaic module according to claim 1, characterized in that: The top of the EVA top film (4) is provided with a spectral conversion film (5), and the top of the spectral conversion film (5) is provided with a low-reflection encapsulation glass (6). The low-reflection encapsulation glass (6) is provided with multiple anti-reflection films on the surface of the encapsulation glass by a coating process to reduce light reflection loss.

7. A high-efficiency photovoltaic module according to claim 6, characterized in that: An aluminum alloy frame (1) is also fitted around the bottom of the photovoltaic base plate (7). The inner walls of the aluminum alloy frame (1) are connected with recessed fitting grooves. The aluminum alloy frame (1) is fitted around the outside of the EVA bottom film (2), photovoltaic cell (3), EVA top film (4), spectral conversion film (5) and low-reflection encapsulation glass (6) through the fitting grooves. The inner wall of the top of the fitting groove and the outer wall of the top of the low-reflection encapsulation glass (6) are also waterproofed and sealed with encapsulating adhesive.

8. A high-efficiency photovoltaic module according to claim 7, characterized in that: The photovoltaic base plate (7) is fixed and waterproofed by silicone sealing at the connection points with the aluminum alloy frame (1). U-shaped mounting sleeves (9) are provided at the four corners of the bottom outer wall of the photovoltaic base plate (7). After multiple U-shaped mounting sleeves (9) are fitted onto the outside of the top of the photovoltaic bracket, they are fixed to the photovoltaic bracket by screws.

Images