Self-cleaning photovoltaic panel
By using 0.2-0.5µm rough glass and a hydrophobic coating layer on the photovoltaic panel, combined with the frame cutout design, the problem of surface contamination of the photovoltaic panel is solved, achieving a self-cleaning effect and improving power generation efficiency and compressive strength.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 刘江
- Filing Date
- 2025-07-28
- Publication Date
- 2026-05-29
AI Technical Summary
Photovoltaic panels are prone to contamination and have poor self-cleaning ability, which affects power generation efficiency.
The glass surface has a roughness of 0.2-0.5um and is covered with a hydrophobic anti-reflective coating. At the same time, a cut design is set on the frame to connect the front of the glass with the outside of the frame, which enhances the ability of rainwater to slide off and distributes the load strength through the support rod.
It improves the self-cleaning ability of photovoltaic panels, reduces dust accumulation, extends service life, improves power generation efficiency, and reduces maintenance costs.
Smart Images
Figure CN224306204U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of photovoltaic panel technology, and in particular to self-cleaning photovoltaic panels. Background Technology
[0002] Photovoltaic panels, also known as photovoltaic modules, are devices that convert solar energy into electrical energy. They consist of solar cells, encapsulant film, glass, backsheet, frame, etc. The glass is mostly made of ordinary low-iron patterned tempered glass combined with anti-reflective coating surface technology, with a roughness of Ra 1um. The large embossing is visible to the naked eye and dust is easy to accumulate. If the dust and other particles on the photovoltaic module are not removed in time, it will easily lead to surface contamination of the photovoltaic module and affect the power generation efficiency.
[0003] Meanwhile, traditional photovoltaic modules typically have a raised aluminum alloy frame covering the A-side (front) to securely enclose the internal laminates. However, this overall enclosure, due to gravity, allows dust and rainwater to easily accumulate on the surface, obstructing and affecting the power generation of the internal solar cells. Over time, the accumulated dirt becomes difficult to clean, sometimes requiring manual scrubbing. Some manufacturers have addressed this issue by eliminating the A-side design, opting for a bottom-edgeless design. However, this introduces the risk of the frame detaching under reverse wind pressure and makes the internal laminates more susceptible to impacts, while also lacking effective protection for the corners. Utility Model Content
[0004] The purpose of this application is to solve the problems of easy contamination and poor self-cleaning ability of photovoltaic panels in the prior art. Therefore, this application provides a self-cleaning photovoltaic panel. By controlling the glass roughness and coating layer, the surface of the photovoltaic panel is not prone to dust accumulation. Furthermore, through the cut edges on the frame, surface dust can be freely slid off with rainwater, thereby improving the self-cleaning ability.
[0005] This application provides a self-cleaning photovoltaic panel, including a frame and a laminated assembly disposed within the frame. The laminated assembly includes glass, solar cells, and a backsheet arranged sequentially.
[0006] The glass has a roughness of 0.2-0.5 μm, and the front surface of the glass is covered with a hydrophobic antireflective coating layer.
[0007] The frame includes two long frames and two short frames arranged opposite each other. One of the long frames and one of the short frames has a first cut at its front end, and both the long frames and the short frames have a second cut in the middle of their front sides. The first cut and the second cut allow the front of the glass to communicate with the outside of the frame.
[0008] By employing the above technical solution, glass with a roughness of 0.2-0.5µm is used, meaning the glass on the outside of the photovoltaic module has a smooth surface while also providing some anti-glare effect. A hydrophobic anti-reflective coating on the front of the glass reduces reflection and allows rainwater and dew to quickly slide off the glass surface, preventing dust accumulation on the photovoltaic panel. Simultaneously, by setting first and second cuts at the ends and middle of the frame, and by connecting the front of the glass (the surface facing away from the solar cells) to the outside of the frame, dust removal is achieved, improving self-cleaning ability. This ensures maximum dust removal on the product surface during outdoor use, allowing dust to slide freely off the photovoltaic panel with rainwater or during maintenance cleaning, reducing the accumulation on the surface that could obstruct the internal solar cells and affect normal power generation.
[0009] In some embodiments, the width of the first cut and the second cut is 6-8 mm.
[0010] In some embodiments, the end splicing surfaces of the long frame and the short frame are adapted bevels, and the first cut includes a first side parallel to the bevel and a second side perpendicular to and connected to the side of the corresponding long frame or the short frame.
[0011] In some embodiments, the ends of the long frame and the short frame are joined at a 45° angle.
[0012] In some embodiments, the first cutout is provided at both ends of the front side of the long frame.
[0013] In some embodiments, two second cutouts are provided in the middle of the front side of both the long frame and the short frame;
[0014] The two second cuts provided on the long frame are evenly distributed along the length direction of the long frame;
[0015] The two second cuts on the short frame are symmetrically distributed about the center line of the short frame, and the distance between them is not less than 2 / 3 of the length of the short frame.
[0016] In some embodiments, the two sides of the second cut are arranged parallel to each other and parallel to the long frame.
[0017] In some embodiments, both the long frame and the short frame include a frame and a slot located above the frame. The front of the long frame and the short frame is the side of the slot, and the edge of the laminated component is engaged in the slot.
[0018] The frame has an extension parallel to the laminating assembly on the side opposite to the laminating assembly. An accommodating space is formed between the extension and the laminating assembly. A support rod is provided between two opposing long side frames. The two ends of the support rod are engaged in the corresponding accommodating space and connected to the extension by fasteners.
[0019] By adopting the above technical solution, the photovoltaic modules are subjected to pressure distribution through the support rods, which effectively disperses the load intensity of snow pressure, wind pressure and other loads, improves the load strength and compressive strength of the product, extends the service life under severe weather conditions, and reduces the occurrence of microcracks in the product.
[0020] In some embodiments, the support rod is an H-shaped rod, and the thickness of the support rod is 1.5-2mm.
[0021] In some embodiments, the hydrophobic antireflective coating layer is simultaneously coated and tempered with the glass using a hydrophobic antireflective coating solution.
[0022] Other features and corresponding beneficial effects of this application will be described in the latter part of the specification, and it should be understood that at least some of the beneficial effects will become obvious from the description in this application. Attached Figure Description
[0023] Figure 1 This is a schematic diagram of the structure of this application;
[0024] Figure 2 This is an enlarged structural diagram of part A in this application;
[0025] Figure 3 This is a partial structural diagram of the long border in this application;
[0026] Figure 4 This is a structural schematic diagram from another angle of this application.
[0027] Explanation of reference numerals in the attached figures:
[0028] 1. Border; 2. Laminated components;
[0029] 10. Long border; 11. Frame; 111. Extension; 12. Card slot;
[0030] 20. Short bezel;
[0031] 30. First incision; 31. First side view; 32. Second side view;
[0032] 40. Second incision;
[0033] 50. Support rod. Detailed Implementation
[0034] The following specific embodiments illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. Although the description of this application is presented in conjunction with preferred embodiments, this does not mean that the features of this application are limited to this embodiment. On the contrary, the purpose of describing the application in conjunction with embodiments is to cover other options or modifications that may be derived based on the claims of this application. To provide a thorough understanding of this application, many specific details will be included in the following description. This application may also be implemented without using these details. Furthermore, to avoid confusion or obscuring the focus of this application, some specific details will be omitted in the description. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.
[0035] It should be noted that in this specification, similar reference numerals and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0036] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used solely for the convenience of describing this application and for simplification, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" 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. Therefore, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more. Unless otherwise explicitly specified and limited, 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; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or a connection within two elements. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0037] Please see Figure 1-3 , Figure 1 This is a schematic diagram of the structure of this application; Figure 2 This is an enlarged structural diagram of part A in this application; Figure 3 This is a partial structural diagram of the long border 10 in this application.
[0038] This application provides a self-cleaning photovoltaic panel, including a frame 1 and a laminate 2 disposed within the frame 1. The laminate 2 includes glass, solar cells and a back sheet arranged sequentially.
[0039] The glass roughness is 0.2-0.5um, usually on the front side of the glass, such as 0.2um, 0.35um, 0.5um, etc., meaning that the glass on the outside of the photovoltaic module has a fine and smooth surface. Moreover, compared with the conventional Ra 1um (roughness) glass of photovoltaic panels, the glass of this application is less prone to dust accumulation, is smoother, and can also provide a certain anti-glare effect compared with ordinary flat glass (Ra 0.01-0.05um).
[0040] Furthermore, the front of the glass is covered with a hydrophobic anti-reflective coating, which reduces reflection and increases light transmission. At the same time, it allows rainwater and dew to quickly slide off the glass surface, making it less prone to dust accumulation on the photovoltaic panel surface.
[0041] Preferably, the hydrophobic antireflective coating layer is formed by simultaneously coating and tempering the glass with a hydrophobic antireflective coating solution.
[0042] This involves spraying a hydrophobic antireflective coating solution onto the glass surface and simultaneously tempering it. This process creates a finer grain pattern on the originally smooth glass surface. Furthermore, the tempered coating solution possesses self-cleaning properties and a certain degree of hardness, distinguishing it from ordinary photovoltaic coated glass.
[0043] The frame 1 includes two long frames 10 and two short frames 20 arranged opposite to each other. One of the long frames 10 and the short frames 20 has a first cut 30 at its front end. The first cut 30 allows the front of the glass to communicate with the outside of the frame 1, which facilitates the removal of dust from the photovoltaic panel surface by rainwater, thus improving the self-cleaning ability of the photovoltaic panel. Furthermore, since one side of the top corner of the laminated component 2 is wrapped, with only the other side exposed, the wrapping and compressive stability of the frame 1 can be ensured, that is, the self-cleaning ability is improved without affecting the strength.
[0044] In one embodiment, a second cutout 40 is provided in the middle of the front side of both the long frame 10 and the short frame 20. The second cutout 40 allows the front side of the glass to communicate with the outside of the frame 1. The second cutout 40 improves the sewage discharge and ash removal capacity, prevents blockage, increases the water discharge volume to easily flush away accumulated dust, and further improves the self-cleaning ability.
[0045] In one embodiment, the width of the first cut 30 and the second cut 40 is 6-8mm, such as 6mm, 7.4mm, 8mm, etc., which can ensure the cleaning effect, reduce the impact on the strength of the frame, and ensure the wrapping of the laminated components.
[0046] In one embodiment, the end splicing surfaces of the long frame 10 and the short frame 20 are adapted bevels, and the first cut 30 includes a first side surface 31 and a second side surface 32.
[0047] The first side 31 is parallel to the inclined plane, taking into account both the width of the cut entrance (i.e., the self-cleaning effect) and the good wrapping of the frame 1 on the laminated component 2.
[0048] The second side 32 is perpendicular to and connected to the side of the corresponding long frame 10 or short frame 20, thereby increasing the cutout exit section and further improving the self-cleaning effect.
[0049] In one embodiment, the ends of the long frame 10 and the short frame 20 are joined at 45°, which is convenient to manufacture and provides good wrapping of the laminated components.
[0050] In one embodiment, the long frame 10 has a first cut 30 at both ends of the front side, which further improves the self-cleaning effect of the photovoltaic panel. Furthermore, the first cut 30 is not provided on the short frame 20, which can ensure the good wrapping of the laminated component 2 by both the long frame 10 and the short frame 20.
[0051] In one embodiment, two second cutouts 40 are provided in the middle of the front side of both the long border 10 and the short border 20.
[0052] The two second cutouts 40 on the long border 10 are evenly distributed along the length of the long border 10.
[0053] The two second cuts 40 on the short border 20 are symmetrically distributed about the center line of the short border 20, and the distance between them is not less than 2 / 3 of the length of the short border 20.
[0054] The frame 1 features a single bottom edge with 4-hole channels and dual sides with 8-hole channels for dust and water drainage. The 4-hole (6-8mm) design increases drainage speed by 30% compared to the 2-hole design at the ends, while maximizing the frame's coverage and compressive stability. This reduces dust accumulation without compromising strength, improves drainage capacity, prevents clogging, and increases water flow for easy flushing of accumulated dust. It also saves on later maintenance costs, improves operational efficiency, and reduces damage from manual bottom cleaning. The hydrophobic coating enhances self-cleaning capabilities and makes the photovoltaic panel easier to dry after cleaning.
[0055] In one embodiment, the two sides of the second cut 40 are arranged parallel to each other and parallel to the long frame 10, which facilitates manufacturing.
[0056] In one embodiment, the first cut 30 and the second cut 40 are formed by punching or milling to ensure the stability and strength of the front of the frame 1, which is not afraid of wind pressure from both directions. At the same time, it improves the sewage and drainage capacity, increases the allowable margin for dust blockage, increases the flood discharge capacity, and makes sewage and drainage smoother. Both long and short sides can be used, and the four-sided frame 1 can be made of composite materials such as aluminum alloy and composite fiberglass frame 1.
[0057] In one embodiment, both the long frame 10 and the short frame 20 include a frame 11 and a slot 12 located above the frame 11. The front of the long frame 10 and the short frame 20 is the side of the slot 12, and the edge of the laminated component 2 is engaged in the slot 12.
[0058] The frame 11 has an extension 111 parallel to the laminating assembly 2 on the side opposite to the laminating assembly 2, and an accommodating space is formed between the extension 111 and the laminating assembly 2.
[0059] Please see Figure 4 , Figure 4 This is a structural schematic diagram from another angle of this application.
[0060] In one embodiment, a support rod 50 is provided between two opposing long frames 10. The two ends of the support rod 50 are engaged in the corresponding receiving space and connected to the extension 111 by fasteners. The support rod 50 distributes pressure on the photovoltaic module, effectively dispersing loads such as snow pressure and wind pressure, improving the product's load strength and compressive strength, extending its service life under severe weather conditions, and reducing the occurrence of microcracks in the product.
[0061] In one embodiment, the support rod 50 is an H-shaped rod, and the thickness of the support rod 50 is 1.5-2mm, such as 1.5mm, 1.8mm, 2mm, etc.
[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application 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 application.
Claims
1. A self-cleaning photovoltaic panel, comprising a frame and a laminated assembly disposed within the frame, the laminated assembly comprising glass, solar cells, and a backsheet arranged sequentially, characterized in that, The glass has a roughness of 0.2-0.5 μm, and the front surface of the glass is covered with a hydrophobic antireflective coating layer. The frame includes two long frames and two short frames arranged opposite each other. One of the long frames and one of the short frames has a first cut at its front end, and both the long frames and the short frames have a second cut in the middle of their front sides. The first cut and the second cut allow the front of the glass to communicate with the outside of the frame.
2. The self-cleaning photovoltaic panel according to claim 1, characterized in that, The width of the first incision and the second incision is 6-8 mm.
3. The self-cleaning photovoltaic panel according to claim 1, characterized in that, The end splicing surfaces of the long frame and the short frame are adapted bevels, and the first cut includes a first side parallel to the bevel and a second side perpendicular to and connected to the side of the corresponding long frame or the short frame.
4. The self-cleaning photovoltaic panel according to claim 3, characterized in that, The ends of the long frame and the short frame are joined at a 45° angle.
5. The self-cleaning photovoltaic panel according to claim 1, characterized in that, The first cutout is provided at both ends of the front side of the long frame.
6. The self-cleaning photovoltaic panel according to claim 1, characterized in that, Two second cutouts are provided in the middle of the front of both the long frame and the short frame; The two second cuts provided on the long frame are evenly distributed along the length direction of the long frame; The two second cuts on the short frame are symmetrically distributed about the center line of the short frame, and the distance between them is not less than 2 / 3 of the length of the short frame.
7. The self-cleaning photovoltaic panel according to claim 1, characterized in that, The two sides of the second cut are arranged parallel to each other and parallel to the long frame.
8. The self-cleaning photovoltaic panel according to claim 1, characterized in that, Both the long frame and the short frame include a frame and a slot located above the frame. The front of the long frame and the short frame is the side of the slot. The edge of the laminated component is engaged in the slot. The frame has an extension parallel to the laminating assembly on the side opposite to the laminating assembly. An accommodating space is formed between the extension and the laminating assembly. A support rod is provided between two opposing long side frames. The two ends of the support rod are engaged in the corresponding accommodating space and connected to the extension by fasteners.
9. The self-cleaning photovoltaic panel according to claim 8, characterized in that, The support rod is an H-shaped rod with a thickness of 1.5-2mm.
10. The self-cleaning photovoltaic panel according to claim 1, characterized in that, The hydrophobic antireflective coating layer is formed by simultaneously coating and tempering the glass with a hydrophobic antireflective coating solution.