Photovoltaic module and photovoltaic power generation system with same

Abstract

The utility model provides a photovoltaic assembly and a photovoltaic power generation system with the same, and belongs to the technical field of photovoltaic assemblies, and the photovoltaic assembly comprises a packaging front plate, a first adhesive film layer, a battery piece layer, a second adhesive film layer and a packaging rear plate which are sequentially laminated. The packaging front plate is a toughened glass layer, and the thickness of the toughened glass is 0.5-2.5 mm; according to the utility model, the thinner toughened glass packaging front plate layer can significantly reduce the weight of the assembly, can avoid the damage to the roof caused by overweight load, and improves the feasibility of installation. In addition, due to the fact that the self weight is light, an over-thick, heavy and complex supporting structure is not needed in the installation process, a simple and low-cost support can be used for fixing, and therefore the installation cost of the whole photovoltaic system is further reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to photovoltaic module technical field, concretely relates to a photovoltaic module and photovoltaic power generation system with it. BACKGROUND

[0002] The photovoltaic module is the core part in the solar power generation system, and the photovoltaic module converts light energy into electric energy through photoelectric conversion effect. The mainstream photovoltaic module at present is crystalline silicon solar module, and the structure of the traditional photovoltaic module is generally front plate, encapsulation adhesive film, cell, encapsulation adhesive film and back plate.

[0003] The front plate of the photovoltaic module is generally glass layer. But the thickness of the traditional glass front plate is generally above 2.5mm, and is generally preferably 3.2mm. The glass front plate with such thickness has higher mechanical strength, can bear greater snow load, wind load and other external forces, but will lead to that the weight of the photovoltaic module is larger, causes unable to satisfy the requirement of bearing load. Especially when facing the installation surface of arc roof, the photovoltaic module with thick glass front plate lacks flexibility, and is difficult to closely fit on the arc surface. And the photovoltaic module with the front plate glass layer of such thickness needs to use complex support structure to adjust the installation plane flatness, and the work load and difficulty of installation are larger, not only time-consuming, but also higher labor cost. SUMMARY

[0004] Therefore, the technical problem to be solved by the utility model lies in overcoming the defects that the glass front plate of the traditional photovoltaic module in the prior art is thick and heavy, so as to provide a photovoltaic module with light thin reinforced glass with a certain bending radius as the front plate.

[0005] In order to solve the above technical problem, the utility model provides a photovoltaic module, which comprises encapsulation front plate, first adhesive film layer, cell piece layer, second adhesive film layer and encapsulation back plate arranged in sequence.

[0006] The encapsulation front plate is a tempered glass layer, and the thickness of the tempered glass is 0.5mm-2.5mm.

[0007] Optionally, the encapsulation front plate is a physical tempered glass layer, and the thickness of the physical tempered glass layer is 1.6mm-2.5mm.

[0008] Optionally, the encapsulation front plate is a chemical tempered glass layer, and the thickness of the chemical tempered glass layer is 0.5mm-2.0mm.

[0009] Optionally, the encapsulation back plate is provided with a junction box on the plate surface away from the second adhesive film layer.

[0010] Optionally, the photovoltaic module further comprises a protection structure and an adhesive structure, the protection structure comprises a first support part and a second support part, the first support part is arranged on the side end surface of the photovoltaic module along the stacking direction of the photovoltaic module, the first support part extends to the plate surface extension part of the back encapsulation plate to form the second support part, and the protection structure is connected with the photovoltaic module through the adhesive structure.

[0011] Optionally, the photovoltaic module further comprises a plate surface support part arranged on the plate surface of the back encapsulation plate away from the second adhesive film layer.

[0012] Optionally, the plate surface support part is arranged close to the outer edge of the back encapsulation plate.

[0013] Optionally, the plate surface of the back encapsulation plate away from the second adhesive film layer is further provided with vertical reinforcing ribs and / or horizontal reinforcing ribs.

[0014] Optionally, the plate surface support part is connected with the back encapsulation plate through the adhesive structure.

[0015] The utility model discloses still provide a kind of photovoltaic power generation system, including the photovoltaic module as described above.

[0016] The utility model technical scheme has the following advantages:

[0017] The photovoltaic module provided by the utility model comprises a front encapsulation plate, a first adhesive film layer, a cell layer, a second adhesive film layer and a back encapsulation plate which are sequentially and orderly stacked. The front encapsulation plate is a tempered glass layer, and the thickness of the tempered glass is 0.5-2.5 mm. The thin tempered glass front encapsulation plate layer can significantly reduce the weight of the module, avoid damage to the roof caused by excessive load, and improve the installation feasibility. Due to the light weight, a simple and low-cost support can be used for fixation during installation, thereby further reducing the installation cost of the entire photovoltaic system. In some special building application scenarios, such as arc-shaped roofs or building surfaces with a certain curvature, the thin tempered glass front encapsulation plate layer has better flexibility. It can better fit the curved surface shape, reduce the gap or unevenness caused by poor fitting, thereby improving the integration of the photovoltaic module and the building, enhancing the appearance of the building, and also being beneficial to improving the power generation efficiency.

[0018] In actual use, the photovoltaic module may be slightly deformed due to temperature changes, slight displacement of the installation foundation and other factors. The thin tempered glass front encapsulation plate layer can better adapt to such slight deformation and is not prone to breakage due to deformation, thereby ensuring the normal operation of the photovoltaic module and prolonging the service life. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings used in the specific embodiments or the prior art description. Obviously, the drawings described below are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0020] Figure 1 It is a cross-sectional view of the photovoltaic module in the present application.

[0021] Figure 2 It is a structure schematic view of the assembled protective structure and photovoltaic module in the present application.

[0022] Figure 3 It is a structure schematic view of the assembled protective structure and photovoltaic module in the present application.

[0023] Figure 4 It is a cross-sectional view of the assembled protective structure and adhesive structure in the present application.

[0024] Figure 5 It is a cross-sectional view of the plate surface support in the present application.

[0025] Figure 6 It is a structure schematic view of the photovoltaic module in the present application.

[0026] Figure 7 It is a structure schematic view of the photovoltaic module in the present application.

[0027] Figure 8 It is a cross-sectional view of the photovoltaic module and traditional photovoltaic module adhering to the arc-shaped roof in the present application.

[0028] Explanation of reference signs:

[0029] 1, photovoltaic module; 11, front encapsulation plate; 12, first adhesive film layer; 13, cell layer; 14, second adhesive film layer; 15, rear encapsulation plate;

[0030] 21, protective structure; 22, adhesive structure; 23, plate surface support; 24, vertical reinforcing rib; 25, horizontal reinforcing rib

[0031] 3, junction box;

[0032] 4, arc-shaped roof;

[0033] 5, traditional photovoltaic module. Specific embodiments

[0034] The technical solutions of the present application will be described clearly and completely below with reference to the drawings. Obviously, the described embodiments are some of the embodiments of the present application, but not all the embodiments. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative efforts belong to the scope of the present application.

[0035] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0036] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0037] In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as there is no conflict.

[0038] The embodiments of the present application will be described below in combination with Figures 1 to 8 .

[0039] The present embodiment provides a photovoltaic module 1, comprising a front encapsulation plate 11, a first adhesive film layer 12, a cell layer 13, a second adhesive film layer 14 and a rear encapsulation plate 15 arranged in sequence.

[0040] The front encapsulation plate 11 is a tempered glass layer, and the thickness of the tempered glass is 0.5mm-2.5mm.

[0041] It is easily understood that the first adhesive film layer 12 and the second adhesive film layer 14 only differ in the installation position, and the whole is an adhesive film layer. The first adhesive film layer 12 and the second adhesive film layer 14 can be made of the same material, or can be made of different materials.

[0042] Specifically, the adhesive film layer can be made of, but is not limited to, common materials such as EVA material, POE material, EPE material, PVB material, etc. The material of the adhesive film layer is not limited herein.

[0043] It is easily understood that the battery sheet layer 13 includes, but is not limited to, P-type, N-type, HJT-type, BC-type, etc.

[0044] It is easily understood that the encapsulation back plate 15 can be made of, but is not limited to, fluorine film and polyester multilayer composite structure, glass fiber reinforced structure, etc. The color of the encapsulation back plate 15 can be black or white, etc. The material and color of the encapsulation back plate 15 are not limited herein.

[0045] It is noted that, as shown in Figure 8 When the thickness of the encapsulation front plate 11 is less than 2.5 mm, the thinner tempered glass has better flexibility and adaptability when facing the curved surface of the arc-shaped roof 4. The traditional photovoltaic module 5 cannot be attached to the arc-shaped roof 4. On the one hand, the thinner tempered glass is more likely to bend without breaking. In the process of attaching to the arc-shaped roof 4, the glass needs to adapt to the curved shape of the roof. If the glass is too thick, it is difficult to bend to the extent of completely attaching to the arc-shaped roof 4, and stress concentration is likely to occur during installation, even leading to glass breakage. The tempered glass with a thickness of less than 2.5 mm is relatively thin and can bend to a certain extent, better adapting to the curve of the arc-shaped roof 4, thereby achieving close attachment. On the other hand, the thinner tempered glass is lighter in weight and has less structural pressure on the arc-shaped roof 4. The arc-shaped roof 4 usually needs to consider the load-bearing problem, especially in some buildings with high requirements for structural strength. The thinner tempered glass is lighter in weight and does not bring too much burden to the roof structure when installed on the arc-shaped roof 4, reducing the risk of deformation or damage of the roof due to excessive load bearing.

[0046] When the thickness of the encapsulation front plate 11 is less than 0.5 mm, higher technical requirements and more precise process control are needed in the production process. For example, problems such as poor flatness and uneven stress distribution. In order to ensure product quality, manufacturers need to invest more in research and development costs and equipment upgrading expenses, resulting in high cost of such glass; and the strength of such tempered glass is insufficient, which may encounter strong winds, hail and other harsh weather conditions in outdoor environments, and it cannot withstand the impact of these external forces, and is likely to break or even shatter. Once the encapsulation front plate 11 is damaged, the internal battery sheet layer 13 will be directly exposed to the external environment, and will be eroded by water, dust, etc., thereby greatly affecting the performance and service life of the photovoltaic module 1.

[0047] The photovoltaic module 1 provided by the embodiment of the utility model, including encapsulation front board 11, first adhesive film layer 12, cell piece layer 13, second adhesive film layer 14 and encapsulation back board 15, sequentially order laminated setting, form a whole through laminating, encapsulation front board 11 is toughened glass layer, and the thickness of toughened glass is 0.5mm-2.5mm. The thin toughened glass encapsulation front board 11 layer can significantly reduce the weight of the module, can avoid the damage to the roof due to the excessive load, improves the feasibility of installation. Because the weight is lighter, during installation, it does not need too thick and complex support structure, can use relatively simple, low-cost support to fix, thereby further reduces the installation cost of the whole photovoltaic system. In some special building application scenarios, such as arc roof 4 or building surface with certain arc, the thin toughened glass encapsulation front board 11 has better flexibility. It can better fit the curved surface shape, reduces the gap or uneven phenomenon due to poor fitting, thereby improves the integration degree of photovoltaic module 1 and building, improves the appearance of building appearance, and is also beneficial to improve the power generation efficiency.

[0048] In actual use, the photovoltaic module 1 may be slightly deformed due to temperature change, slight displacement of installation foundation and other factors. The thin toughened glass encapsulation front board 11 can better adapt to the slight deformation and is not easy to break due to deformation, thereby ensuring the normal operation of the photovoltaic module 1 and improving the service life.

[0049] Further, the encapsulation front board 11 is a physical toughened glass layer, and the thickness of the physical toughened glass layer is 1.6mm-2.5mm.

[0050] It should be noted that when the encapsulation front board 11 is a toughened glass layer made of a physical toughening process, the preparation process is as follows: after being heated at a suitable temperature, rapid cooling is performed, the glass surface will sharply contract, a compressive stress is generated, and a tensile stress is generated in the middle layer of the glass, thereby enabling the glass to have high strength, the thickness can be 1.6mm-2.5mm, the visible light transmittance should be greater than 91.5%, and the content of Al2O3 should be greater than 1%.

[0051] Further, the encapsulation front board 11 is a chemical toughened glass layer, and the thickness of the chemical toughened glass layer is 0.5mm-2.0mm.

[0052] It should be noted that when the encapsulation front board 11 is a toughened glass layer made of a chemical toughening process, the preparation process is as follows: the glass is immersed in high-temperature molten salt at high temperature, the alkali ions in the glass and the alkali ions in the molten salt are exchanged with each other, an “extrusion” phenomenon is generated, a compressive stress is generated on the surface molecules of the glass, and the strength of the glass is increased, the thickness can be 0.5mm-2.0mm, the visible light transmittance should be greater than or equal to 91.0%, and the content of Al2O3 should be greater than 12%.

[0053] Furthermore, such as Figure 2 As shown, a junction box 3 is provided on the surface of the encapsulated board 15 away from the second adhesive film layer 14.

[0054] As is easily understood, junction box 3 serves as the electrical connection hub of photovoltaic module 1, concentrating and discharging the current generated by cell layer 13.

[0055] Furthermore, such as Figure 4 As shown, it also includes a protective structure 21 and an adhesive structure 22. The protective structure 21 includes a first support part and a second support part. The first support part is disposed on the side end face of the photovoltaic module 1 along the stacking direction of the photovoltaic module 1. The first support part extends to the surface of the encapsulation back plate 15 to form the second support part. The protective structure 21 is connected to the photovoltaic module 1 through the adhesive structure 22.

[0056] It should be noted that the photovoltaic module 1 can be of any effective size, as long as its area is less than approximately 1.65m². 2 At this time, it can be installed directly without a protective structure 21; when its area is approximately 1.65-2m² 2 During this period, a protective structure 21 and an adhesive structure 22 can be installed to enhance the support strength of the photovoltaic module 1.

[0057] It should be noted that, Figure 2 and Figure 3 The only difference between the photovoltaic modules is the arrangement direction of the cell layer 13. Figure 2 The arrangement direction of the middle battery cell layer 13 is horizontal, while Figure 3 The battery cell layer 13 is arranged vertically.

[0058] Intuitively, the first support is positioned along the stacking direction of the photovoltaic module 1 on its side surface, preventing damage to the sides of the photovoltaic module 1 from impacts, scratches, or other external forces. During handling, installation, and use, the sides of the photovoltaic module 1 are often susceptible to collisions; the first support provides robust protection, reducing the risk of module damage. The second support extends towards the surface of the encapsulation back panel 15, further enhancing the overall support and protection of the photovoltaic module 1. Specifically, it reduces the pressure and impact on the encapsulation back panel 15, improving the stability and reliability of the module. Furthermore, the second support does not completely cover the encapsulation back panel 15, further reducing the overall weight of the photovoltaic module.

[0059] As easily understood, the protective structure 21 is connected to the photovoltaic module 1 via the adhesive structure 22, making the protective structure 21 and the photovoltaic module 1 a single unit. During installation, this increases the overall rigidity of the photovoltaic module 1, reducing deformation and displacement caused by external forces. Simultaneously, the adhesive structure 22 can evenly distribute stress, improving the stability and firmness of the installation. The adhesive structure 22 can be an adhesive.

[0060] Specifically, in the present embodiment, the first support part and the second support part are formed in an L-shaped structure by integral molding.

[0061] It is easily understood that the first support part can be made of high-strength plastic, metal or composite material. Here, the material of the first support part is not specifically limited. Its shape can be designed according to the shape of the photovoltaic module 1, and is generally in the shape of a long strip or a frame. The thickness and width of the first support part should be selected according to actual needs to ensure that sufficient mechanical strength can be provided. The second support part extends from the first support part to the plate surface of the encapsulated back plate 15, and can also be made of the same material as the first support part. Here, the material of the second support part is not specifically limited. The shape of the second support part can be designed according to the shape of the encapsulated back plate 15, and is generally in the shape of a flat plate or an arc-shaped plate. The second support part can be connected to the first support part by welding, bonding or integral molding, etc.

[0062] Further, the plate surface support 23 is arranged on the plate surface of the encapsulated back plate 15 away from the second adhesive film layer 14.

[0063] It should be noted that when the area of the photovoltaic module 1 is about 2-3m 2 between, in order to improve the overall strength of the photovoltaic module 1, the plate surface support 23 is added.

[0064] It is easily understood that the plate surface support 23 provides additional support to the encapsulated back plate 15, which can effectively prevent the encapsulated back plate 15 from deforming or being damaged when the photovoltaic module 1 is subjected to external forces (such as wind pressure, vibration, etc.). It is helpful to maintain the overall structural integrity of the photovoltaic module 1 and ensure its normal operation and service life. The plate surface support 23 is usually a frame structure made of metal, such as an aluminum alloy frame.

[0065] Further, the plate surface support 23 is arranged close to the outer edge of the encapsulated back plate 15.

[0066] It is easily understood that for a larger size photovoltaic module 1, the stability of the edge is particularly important. Arranging the plate surface support 23 close to the outer edge of the encapsulated back plate 15 can effectively prevent the edge from warping or sagging, and ensure that the overall shape of the photovoltaic module 1 remains good.

[0067] Further, the vertical reinforcing ribs 24 are arranged on the plate surface of the encapsulated back plate 15 away from the second adhesive film layer 14.

[0068] Further, the horizontal reinforcing ribs 25 are arranged on the plate surface of the encapsulated back plate 15 away from the second adhesive film layer 14.

[0069] It is easy to understand that the vertical reinforcing ribs 24 and the horizontal reinforcing ribs 25 are only different in the installation direction, and there is no substantial difference. The reinforcing ribs can increase the rigidity of the encapsulation back plate 15, effectively resisting bending deformation. It can also be used as a mounting point of the photovoltaic module 1, which is convenient for fixing it on the mounting bracket. The installer can firmly install the photovoltaic module 1 on the roof, wall surface and other positions through the holes or connecting pieces on the reinforcing ribs, to ensure that it will not loosen or shift during use.

[0070] Further, the plate surface support 23 is connected with the encapsulation back plate 15 through the bonding structure 22.

[0071] A photovoltaic product is provided, which has the following structure: a 1.6mm-thick physical toughened glass encapsulation front plate 11, a first POE film layer 12 (440-520g / m 2 ), a P-type cell layer 13, a second POE film layer 14, and a white high-reflection CPC high-molecular encapsulation back plate 15; the preparation process is as follows: lamination temperature 130-160℃, lamination time 15-30min, lamination pressure -30- -40kpa, and edge sealing tape 3-5 points per edge.

[0072] A photovoltaic product is provided, which has the following structure: a 1.1mm-thick chemical toughened glass encapsulation front plate 11, a first EVA film layer 12 (440-520g / m2), an N-type cell layer 13, a second EVA film layer 14, and a black high-reflection KPF high-molecular encapsulation back plate 15; the preparation process is as follows: lamination temperature 130-160℃, lamination time 15-30min, lamination pressure -30- -40kpa, and continuous edge sealing of edge sealing tape per edge (leaving uniform exhaust holes).

[0073] A photovoltaic product is provided, which has the following structure: a 0.5mm-thick chemical toughened glass encapsulation front plate 11, a first EPE film layer 12, an HJT-type cell layer 13, a second EPE film layer 14, and a glass fiber reinforced high-molecular encapsulation back plate 15; the preparation process is as follows: lamination temperature 130-160℃, lamination time 15-30min, lamination pressure -30- -40kpa, and continuous edge sealing of edge sealing tape per edge (leaving uniform exhaust holes).

[0074] The photovoltaic product is provided with a front encapsulation plate 11 of 2.5 mm thick physical toughened glass, a first PVB adhesive film layer 12 (0.38-1.52 mm thick), a BC type cell layer 13, a second PVB adhesive film layer 14, and a white high-reflection KPF high-molecular encapsulation back plate 15; the preparation process is as follows: laminating temperature 140-170 DEG C, laminating time 1-3 h, laminating pressure -0.5 to -1.5 MPa, and 3-5 point positions of edge sealing adhesive tape are used for edge sealing and fixing.

[0075] The utility model still provides a photovoltaic power generation system, including the photovoltaic module 1 as above.

[0076] Obviously, the above embodiments are only examples for clearly illustrating, and are not the limitation of the embodiments. For the ordinary skilled in the art, other different forms of changes or variations can be made on the basis of the above description. Here, all the embodiments need not and cannot be exhausted. The obvious changes or variations derived therefrom are still within the protection scope of the utility model.

Claims

1. A photovoltaic module, characterized by, The encapsulation front plate (11), the first adhesive film layer (12), the battery piece layer (13), the second adhesive film layer (14) and the encapsulation back plate (15) are sequentially and orderly arranged in a stack. The encapsulation front plate (11) is a tempered glass layer, and the thickness of the tempered glass is 0.5-2.5 mm. The protection structure (21) includes a first support part and a second support part, the first support part is arranged on the side end surface of the photovoltaic module (1) along the stacking direction of the photovoltaic module (1), the first support part extends to the plate surface extension part of the encapsulation back plate (15) to form the second support part, and the protection structure (21) is connected with the photovoltaic module (1) through the adhesive structure (22).

2. The photovoltaic module of claim 1, wherein, The encapsulation front plate (11) is a physical tempered glass layer, and the thickness of the physical tempered glass layer is 1.6-2.5 mm.

3. The photovoltaic module of claim 1, wherein, The encapsulation front plate (11) is a chemical tempered glass layer, and the thickness of the chemical tempered glass layer is 0.5-2.0 mm.

4. The photovoltaic module according to any of claims 1-3, characterized in that, The encapsulation back plate (15) is provided with a junction box (3) on the plate surface away from the second adhesive film layer (14).

5. The photovoltaic module according to any of claims 1-3, characterized in that, The plate surface support (23) is arranged on the plate surface of the encapsulation back plate (15) away from the second adhesive film layer (14).

6. The photovoltaic module of claim 5, wherein, The plate surface support (23) is arranged close to the outer edge of the encapsulation back plate (15).

7. The photovoltaic module of claim 5, wherein, The encapsulation back plate (15) is further provided with a vertical reinforcing rib (24) and / or a horizontal reinforcing rib (25) on the plate surface away from the second adhesive film layer (14).

8. The photovoltaic module of claim 6, wherein, The plate surface support (23) is connected with the encapsulation back plate (15) through the adhesive structure (22).

9. A photovoltaic power system, characterized by, The photovoltaic module (1) of any one of claims 1-8.

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