Photovoltaic module glass plate and photovoltaic module

Abstract

The utility model relates to the technical field of photovoltaic power generation, particularly provides a photovoltaic module glass plate and a photovoltaic module, and aims to solve the problem that a battery piece is damaged due to the fact that glass in the conventional photovoltaic module is easy to burst under the action of external force. Therefore, the photovoltaic module glass plate comprises a glass body, the glass body comprises an embossed area and a first plane area arranged along the edge of the embossed area in a surrounding mode, the embossed area can cover a photovoltaic cell, a pattern structure is arranged on one side, close to the photovoltaic cell, of the embossed area, and the first plane area is of a smooth surface structure. Through the structural arrangement, the problem of stress concentration at the edge of the glass body can be dispersed and relieved, the embossed area is protected, the overall structural stability of the glass body is enhanced, the risk that the glass body bursts due to stress concentration is remarkably reduced, and the safety performance of the photovoltaic module glass plate is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic power generation, and specifically provides a photovoltaic component glass plate and a photovoltaic component. Background Art

[0002] Photovoltaic modules, also known as solar panels, are devices that use the photovoltaic effect to convert sunlight directly into electricity. They are primarily composed of eight materials: cells, EVA (ethylene-vinyl acetate copolymer), tempered glass, backsheet, soldering tape, silicone, junction box, and frame. The cells are the core of the module, responsible for converting sunlight into electricity. The EVA film bonds the cells to the glass and backsheet, providing a seal and protection. The tempered glass and backsheet protect the cells and EVA film, preventing damage to the module from the outside world. The soldering tape connects the cells to form the circuit. The silicone and junction box provide electrical connections and packaging for the module.

[0003] During installation and use, photovoltaic modules face a variety of complex mechanical loads and stresses. These include salt spray corrosion and wind pressure at the seaside, strong winds and temperature fluctuations in plains and mountainous areas, and severe cold and snow loads in extremely cold regions. These environmental factors, along with issues like people stepping on them during installation, can cause photovoltaic module failures such as glass cracking and hidden cracks in the cells.

[0004] Therefore, this field needs a new technical solution to solve the above problems. Utility Model Content

[0005] The utility model aims to solve the above technical problem, that is, to solve the problem that the glass in the existing photovoltaic assembly is prone to bursting under the action of external force, thereby causing damage to the battery cell.

[0006] In a first aspect, the utility model provides a photovoltaic module glass plate, which includes a glass body, the glass body including an embossed area and a first plane area surrounded along the edge of the embossed area, the embossed area can cover the photovoltaic cell and the embossed area is provided with a patterned structure on the side close to the photovoltaic cell, and the first plane area is a smooth structure.

[0007] In the preferred technical solution of the above-mentioned photovoltaic module glass plate, a bus bar outlet is opened on the embossed area, and a second planar area is circumferentially arranged along the edge of the bus bar outlet, and the second planar area is a smooth surface structure on the side close to the photovoltaic glass.

[0008] In the preferred technical solution of the above photovoltaic module glass plate, the width of the first planar area is 10 mm to 20 mm.

[0009] In the preferred technical solution of the above photovoltaic module glass plate, the width of the second planar area is 5 mm to 10 mm.

[0010] In the preferred technical solution of the above photovoltaic module glass plate, the pattern structure has a pyramid shape, a strip groove shape or a honeycomb shape.

[0011] In the preferred technical solution of the above photovoltaic module glass plate, the glass body is ultra-white glass.

[0012] In the preferred technical solution of the above photovoltaic module glass plate, the thickness of the glass body is 0.5 mm to 4 mm.

[0013] In a second aspect, the utility model also provides a photovoltaic module, comprising a frame and a photovoltaic module body, wherein the frame is sleeved on the outer surface of the photovoltaic module body, and the photovoltaic module body comprises a front panel, an upper layer of adhesive film, a battery cell, a lower layer of adhesive film and a back panel arranged in sequence from top to bottom, and a junction box is provided on the back panel, and the junction box is electrically connected to the battery cell, and the front panel and / or the back panel are the above-mentioned photovoltaic module glass panels.

[0014] In the preferred technical solution of the above photovoltaic module, the material of the upper film and / or the lower film is EVA, POE, PVB or organic silicone.

[0015] In the preferred technical solution of the above photovoltaic module, the frame is made of an alloy material or a composite material.

[0016] It will be understood by those skilled in the art that the technical solution of the present invention provides a photovoltaic module glass plate, which includes a glass body, the glass body including an embossed area and a first planar area enclosed along the edge of the embossed area, the embossed area can cover the photovoltaic cell and the side of the embossed area close to the photovoltaic cell is provided with a patterned structure, and the first planar area is a smooth surface structure (i.e., no pattern or other concave-convex structure is provided). When the above technical solution is adopted, the present invention can effectively solve the problem of stress concentration at the edge of the traditional photovoltaic module glass plate, thereby improving the safety and stability of the photovoltaic module. Specifically, because the embossed area can improve the utilization rate of light on the photovoltaic cell by changing the incident angle and path of light, the generation of electrical energy is increased. Since in conventional photovoltaic module glass plates, the edge area is often prone to stress concentration due to factors such as processing and installation, resulting in cracking or bursting of the glass, the present invention uses a first planar area enclosed along the edge of the embossed area, and designs the first planar area to be a smooth area without pattern, that is, a smooth area (or planar area) without a patterned structure. This area helps disperse and alleviate stress concentration at the edges of the glass, protecting the patterned area and enhancing the overall structural stability of the glass, significantly reducing the risk of glass cracking due to stress concentration. By reducing stress concentration, the present invention improves the overall strength and stability of the photovoltaic module glass, thereby enhancing the safety of the module.

[0017] Furthermore, the embossed area of ​​the present invention is provided with a busbar outlet, and a second planar area is provided circumferentially along the edge of the busbar outlet. The side of the second planar area close to the photovoltaic glass is a smooth surface structure. Since the busbar outlet is a key structure in the photovoltaic module, it connects the photovoltaic cells and the external circuit. Therefore, it is necessary to reduce the stress of the busbar outlet to prevent damage to the busbar outlet. The second planar area of ​​the present invention helps to disperse and relieve the stress in this area by providing a smooth, pattern-free transition area, thereby reducing the risk of damage to the busbar outlet due to stress concentration. This further reduces the risk of the photovoltaic module glass plate bursting due to stress concentration, and improves the safety performance of the entire photovoltaic module. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The preferred embodiments of the present invention are described below with reference to the accompanying drawings, in which:

[0019] Figure 1 This is a schematic diagram of the structure of the glass body of the utility model Figure 1 ;

[0020] Figure 2 This is a schematic diagram of the structure of the glass body of the utility model Figure 2 ;

[0021] Figure 3 This is a schematic diagram of the structure of the glass body of the utility model Figure 3 .

[0022] List of reference numerals:

[0023] 1. Glass body; 11. Embossed area; 111. Busbar outlet; 12. First plane area; 13. Second plane area. DETAILED DESCRIPTION

[0024] Preferred embodiments of the present invention are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are intended solely to illustrate the technical principles of the present invention and are not intended to limit the scope of protection of the present invention. For example, although the following embodiments are described in conjunction with photovoltaic modules, the photovoltaic module glass sheets provided by the present invention are equally applicable to other products that require solutions to address the problem of glass cracking caused by stress concentration.

[0025] It should be noted that, in the description of this utility model, unless otherwise specified or limited, the terms "disposed" and "connected" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integral connection. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0026] Based on the problem pointed out in the background art that the glass in existing photovoltaic modules is prone to cracking under external forces, resulting in damage to the solar cells, the utility model provides a photovoltaic module glass plate and photovoltaic module, which aims to disperse and relieve stress at the edge of the glass plate by using a first planar area enclosed along the edge of the embossed area of ​​the glass plate, thereby effectively solving the problem of glass in photovoltaic modules being prone to cracking under external forces.

[0027] In the first aspect, the utility model provides a photovoltaic module, including a frame and a photovoltaic module body, the frame is mounted on the outer surface of the photovoltaic module body, the photovoltaic module body includes a front panel, an upper film, a battery cell, a lower film and a back panel arranged in sequence from top to bottom, and a junction box is provided on the back panel, which is electrically connected to the battery cell.

[0028] The frame is designed to fit over the outer surface of the PV module. This design not only provides additional protection for the PV module from external damage such as wind, rain, and impact, but also enhances the overall structural strength of the PV module, making it more stable during installation and use.

[0029] Preferably, the frame is made of an alloy material or a composite material.

[0030] For example, the alloy material can be aluminum alloy, stainless steel, magnesium alloy, etc., and the composite material can be GFRP, carbon fiber composite material, etc. These materials all have excellent performance and can play a role in protecting and supporting the entire photovoltaic module. Of course, in other embodiments, the frame material can also be plastic, rubber, etc. This utility model does not impose specific restrictions on the frame material, as long as it can provide effective protection for the photovoltaic module.

[0031] The photovoltaic module itself is the core component of the module, responsible for converting sunlight into electricity. The front panel primarily protects the internal cells from the external environment while allowing sunlight to penetrate and reach the cells. The upper film, located between the front panel and the cells, acts as a bond and cushion, ensuring a tight fit between the front panel and the cells while preventing impurities such as moisture and dust from entering the module. The cells are the most important component of a photovoltaic module, responsible for converting sunlight into electricity. For example, cells are typically made of semiconductor materials such as silicon and offer high photoelectric conversion efficiency. The lower film, located between the cells and the back panel, also acts as a bond and cushion, protecting the cells from direct impact from the back panel and the external environment. The back panel, located at the bottom layer of the photovoltaic module, provides sealing and protection, ensuring the stability and durability of the module over long-term use.

[0032] Preferably, the material of the upper film and / or the lower film is EVA, POE, PVB or organic silicone.

[0033] In the photovoltaic module body, the upper and lower films play a vital role. They not only need to tightly bond the front panel, battery cells and back panel together to form an integral structure, but also need to have good light transmittance, weather resistance and electrical insulation to ensure the stable operation and efficient power generation of the photovoltaic module.

[0034] EVA (ethylene-vinyl acetate copolymer) is a commonly used photovoltaic module encapsulation material with excellent light transmittance, adhesion, and weather resistance. It effectively encapsulates the solar cells within the module, preventing the ingress of impurities such as moisture and dust while ensuring smooth light transmission, thereby achieving efficient photoelectric conversion.

[0035] POE (polyolefin elastomer) is a new type of photovoltaic encapsulation material with excellent weather resistance and aging resistance. During long-term outdoor use, POE can better resist the effects of harsh environments such as ultraviolet rays, high temperature and humidity, thereby extending the service life of photovoltaic modules.

[0036] PVB (polyvinyl butyral) has good light transmittance, toughness and impact resistance. PVB can effectively absorb and disperse the impact energy of external impact on the photovoltaic module, protecting the battery piece from damage. In addition, PVB also has excellent fireproof performance, which can improve the safety of the photovoltaic module.

[0037] Silicone glue is a high-performance bonding material with excellent weather resistance, high temperature resistance and electrical insulation. In the photovoltaic module, silicone glue not only can realize the tight bonding between the front plate, battery piece and back plate, but also can effectively prevent the invasion of impurities such as moisture and dust. In addition, silicone glue also has good elasticity, which can adapt to the small deformation of photovoltaic module in use, thereby improving the stability and reliability of the module.

[0038] Further, in other embodiments, the materials of the upper glue film and the lower glue film can also be TPO (thermoplastic polyolefin), TPU (thermoplastic polyurethane) and the like. The materials of the upper glue film and the lower glue film are not limited in the utility model, as long as they can effectively protect the photovoltaic battery piece and improve the safety of the photovoltaic module.

[0039] The utility model discloses a wiring box is designed on the back plate, and the wiring box is electrically connected with the battery piece and is used for collecting and outputting the electric energy generated by the battery piece. This design not only simplifies the circuit connection of the photovoltaic module, but also improves the efficiency and safety of the electric energy transmission.

[0040] In addition, as shown in Figure 1 and Figure 2 The utility model discloses a photovoltaic module glass plate, the front plate and the back plate in the photovoltaic module body can adopt this photovoltaic module glass plate. The photovoltaic module glass plate includes glass body 1, and the glass body 1 includes embossed area 11 and the first plane area 12 along the edge of embossed area 11 and surrounds, and the embossed area 11 can cover photovoltaic cell and is provided with pattern structure on the side close to photovoltaic cell, and the first plane area 12 is light surface structure.

[0041] The embossed area 11 is a specific area on the glass body 1, which is designed to cover the photovoltaic cell. The embossed area 11 is provided with a pattern structure on the side close to the photovoltaic cell. The pattern structure can change the shape of the glass surface, thereby improving the scattering and transmittance of light on the glass surface. This change allows more light to enter the interior of the glass and be captured by the photovoltaic cell, thereby converting into electrical energy. In addition, the pattern structure can also reduce the generation of reflected light. When sunlight shines on the embossed glass surface, more refraction and scattering of light will occur, rather than direct reflection back, which helps to reduce the loss of light and further improves the photovoltaic power generation efficiency.

[0042] The first planar region 12 is a flat, unpatterned area surrounding the edge of the embossed region 11. This helps disperse and alleviate stress concentration at the edge of the glass body 1, protects the embossed region 11, and enhances the overall structural stability of the glass body 1, significantly reducing the risk of cracking due to stress concentration. By reducing stress concentration, the present invention improves the overall strength and stability of the photovoltaic module glass sheet, thereby enhancing the safety of the photovoltaic module. Preferably, the patterned structure is in the shape of a pyramid, strip grooves, or a honeycomb.

[0043] For example, Figure 1 As shown, the first planar region 12 in the present invention can be arranged along the length of the glass body 1, at the edge of the embossed region 11. Since stresses in photovoltaic modules are often concentrated along the length, particularly during installation and transportation, this layout effectively disperses these stresses, reducing the risk of cracking the glass body 1 due to stress concentration. Furthermore, arranging the first planar region 12 along the length is easier to implement, as it simplifies cutting and processing.

[0044] In addition, if Figure 2 As shown, the first planar area 12 in the present invention can also be arranged along the four sides of the glass body 1 at the edge of the embossed area 11. This arrangement provides all-round protection for the embossed area 11, not only preventing cracking caused by edge stress concentration, but also reducing the risk of damage caused by external impact or scratches.

[0045] By optimizing the shape design of the pattern structure, light reflection on the glass surface can be reduced, increasing light transmittance and absorption, thereby improving the photovoltaic conversion efficiency of photovoltaic modules. For example, a pyramid-shaped pattern structure can more effectively reduce light reflection on the glass surface and increase light transmittance. Furthermore, the pyramid structure increases the roughness of the glass surface, improving self-cleaning properties and reducing the adhesion of dust and dirt. A strip-shaped pattern structure can guide light through multiple reflections within the glass, extending the light path within the glass, thereby increasing light absorption. Furthermore, the strip-shaped pattern structure increases the strength of the glass and improves its impact resistance. A honeycomb-shaped pattern structure offers excellent structural stability and lightweight properties. It reduces the weight of the glass sheet while maintaining strength, facilitating installation and transportation. Furthermore, the honeycomb structure provides excellent thermal and sound insulation, reducing energy consumption. Of course, in other embodiments, the pattern structure can be adjusted appropriately to achieve optimal results based on specific needs and conditions. This utility model does not limit the specific form of the pattern structure.

[0046] Preferably, the glass body 1 is ultra-white glass.

[0047] Ultra-white glass has an extremely low iron content (usually less than 0.015%), which makes its light transmittance as high as over 91.5%, which is much higher than the light transmittance of ordinary glass. High light transmittance can ensure that more sunlight penetrates the glass and is absorbed by the photovoltaic panels, thereby improving the photoelectric conversion efficiency of the photovoltaic modules. In addition, ultra-white glass has excellent weather resistance and corrosion resistance, and can resist the erosion of harsh environments such as ultraviolet rays, wind and sand, rain and snow. This helps to extend the service life of photovoltaic modules and reduce maintenance costs. For example, ultra-white glass can be ultra-white embossed coated glass, ultra-white float glass, etc. The utility model does not specifically limit the specific type of ultra-white glass.

[0048] Preferably, the thickness of the glass body 1 is 0.5 mm to 4 mm.

[0049] Within this thickness range, the glass body 1 maintains sufficient light transmittance, ensuring that sunlight can penetrate the glass and be effectively absorbed by the photovoltaic cells. Furthermore, within this thickness range, the glass body 1 exhibits excellent weather resistance, resisting erosion from harsh environments such as ultraviolet rays, wind and sand, rain and snow. In other embodiments, the specific thickness of the glass body 1 should be selected based on comprehensive considerations of the application scenario, performance requirements, and cost budget. For example, the thickness of the glass body 1 may also be 0.4 mm, 5 mm, or other thicknesses. This invention does not impose specific limitations on the thickness of the glass body 1.

[0050] Preferably, the width of the first planar area 12 is 10 mm to 20 mm.

[0051] The larger the width of the first planar area 12, the more effectively it can disperse edge stress and reduce stress concentration. When the width is within the range of 10mm to 20mm, the relationship between stress dispersion and material utilization can be better balanced. Although the first planar area 12 has no patterned structure, its width also has a certain impact on the optical performance of the photovoltaic module. An overly wide planar area may reduce the effective illumination area and reduce the photoelectric conversion efficiency. The width range of 10mm to 20mm can effectively retain the illumination area while ensuring stress dispersion, thereby ensuring the optical performance of the photovoltaic module. Of course, in other embodiments, the width of the first planar area 12 can be adaptively adjusted according to the installation environment and optical performance of the photovoltaic module. The present utility model does not specifically limit the width of the first planar area 12.

[0052] Preferably, if Figure 3 As shown, a busbar outlet 111 is provided on the embossed area 11 , and a second plane area 13 is circumferentially provided along the edge of the busbar outlet 111 . The side of the second plane area 13 close to the photovoltaic glass is a smooth surface structure.

[0053] Because the busbar outlet 111 is a critical structure in a photovoltaic module, connecting the photovoltaic cells to the external circuit, it is necessary to reduce stress at the edge of the busbar outlet 111 to prevent damage. The second planar region 13 of the present invention provides a smooth, undecorated transition zone. During the busbar extraction process, the undecorated second planar region 13 acts as a buffer and protector, helping to disperse and alleviate stress in this area and avoiding damage or deformation that could occur due to direct force on the embossed structure. This further reduces the risk of cracking the photovoltaic module glass panel due to stress concentration, improving the overall safety of the photovoltaic module.

[0054] Preferably, the width of the second planar area 13 is 5 mm to 10 mm.

[0055] By setting the width of the second planar area 13 to 5mm to 10mm, the force at the outlet can be more effectively dispersed and absorbed, thereby avoiding damage or deformation of the embossed structure due to direct force, and further reducing the risk of the photovoltaic module glass plate bursting due to stress concentration. This width range not only meets the functional requirements of the photovoltaic module, but also improves its reliability, safety and durability. Furthermore, in other embodiments, the width of the second planar area 13 can also be other values ​​such as 4mm, 11mm, etc. The utility model does not specifically limit the width of the second planar area 13, as long as it can effectively disperse the stress at the bus bar outlet 111 and prevent the bus bar outlet 111 from being damaged by force.

[0056] Thus far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art may make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will fall within the scope of protection of the present invention.

Claims

1. A photovoltaic module glass plate, characterized in that: The photovoltaic module glass plate comprises a glass body (1), the glass body (1) comprising an embossed area (11) and a first plane area (12) arranged along the edge of the embossed area (11), the embossed area (11) being capable of covering a photovoltaic cell and a patterned structure being provided on a side of the embossed area (11) close to the photovoltaic cell, and the first plane area (12) being a smooth surface structure.

2. The photovoltaic module glass plate according to claim 1, characterized in that: A busbar outlet (111) is provided on the embossed area (11), and a second plane area (13) is provided circumferentially of the busbar outlet (111) along the edge of the busbar outlet (111), wherein the side of the second plane area (13) close to the photovoltaic cell is a smooth surface structure.

3. The photovoltaic module glass plate according to claim 1, characterized in that: The width of the first plane area (12) is 10 mm to 20 mm.

4. The photovoltaic module glass plate according to claim 2, characterized in that: The width of the second plane area (13) is 5 mm to 10 mm.

5. The photovoltaic module glass plate according to claim 1, characterized in that: The pattern structure has a pyramid shape, a strip groove shape or a honeycomb shape.

6. The photovoltaic module glass plate according to claim 1, characterized in that: The glass body (1) is ultra-white glass.

7. The photovoltaic module glass plate according to claim 1, characterized in that: The thickness of the glass body (1) is 0.5 mm to 4 mm.

8. A photovoltaic module, comprising a frame and a photovoltaic module body, wherein the frame is sleeved on the outer surface of the photovoltaic module body, the photovoltaic module body comprises a front plate, an upper film, a battery cell, a lower film, and a back plate arranged in order from top to bottom, the back plate being provided with a junction box, the junction box being electrically connected to the battery cell, characterized in that: The front plate and / or the back plate is the photovoltaic module glass plate according to any one of claims 1 to 7.

9. The photovoltaic module according to claim 8, characterized in that: The material of the upper film and / or the lower film is EVA, POE, PVB or organic silicone.

10. The photovoltaic module according to claim 8, characterized in that: The frame is made of alloy material or composite material.

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