Adhesive film pattern structure, photovoltaic adhesive film and photovoltaic module

Abstract

The embodiment of the utility model provides an adhesive film pattern structure, a photovoltaic adhesive film and a photovoltaic module, and relates to the technical field of photovoltaic adhesive films. The adhesive film pattern structure comprises a first convex part, a first concave part and a second concave part, the first convex part is arranged around the first concave part, and the second concave part is arranged around the first convex part; the first protruding part is provided with a notch, and the first concave part and the second concave part are communicated through the notch. And the first concave part and the second concave part can store air, so that adhesion between the adhesive films is avoided. The friction force of the adhesive film can be increased through the arrangement of the first protruding parts, and the situation that the adhesive film slips on glass or the situation that a battery string slips on the adhesive film is reduced. Besides, the first convex part is provided with the notch, and the first concave part is communicated with the second concave part, so that air in the concave parts can be quickly discharged in the high-temperature laminating and vacuumizing process of the adhesive film, and the phenomena of bubbles and delamination are reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to photovoltaic adhesive film technical field, specifically, relate to a kind of adhesive film pattern structure, photovoltaic adhesive film and photovoltaic module. BACKGROUND

[0002] In recent years, the rapid development of photovoltaic industry, especially the upgrading of component manufacturing, drives the continuous upgrading and optimization of related industries, and packaging materials are one of them. The rapid increase in sales of double-sided double-glass components has driven the upgrade of photovoltaic adhesive film from EVA adhesive film to POE adhesive film.

[0003] However, the main reason for the rapid development of POE adhesive film at present is the slip problem of pure POE adhesive film. The main reason is that a large amount of polar additives are added in the POE formula, but these polar additives are not compatible with non-polar POE resin, and are easy to precipitate on the surface of the adhesive film, and at the same time cause water vapor to accumulate at the additive precipitation position, resulting in slipping of the adhesive film during use and water vapor bubbles during lamination process. At the same time, the roughness of the adhesive film is not enough, which can easily stick during production and storage, resulting in cutting and deformation of the adhesive film during use, and the battery piece is easy to deviate under high pressure during high-temperature lamination and vacuumizing process. SUMMARY

[0004] The utility model provides a kind of adhesive film pattern structure, photovoltaic adhesive film and photovoltaic module, which can prevent the adhesive film from sticking together and increase the friction of the adhesive film, reducing the occurrence of slipping or deviation of the adhesive film during installation.

[0005] The embodiments of the utility model can be implemented as follows:

[0006] The embodiments of the utility model provide an adhesive film pattern structure, which comprises:

[0007] The first protruding part, the first recessed part and the second recessed part are arranged around the first recessed part, and the second recessed part is arranged around the first protruding part. The first protruding part is provided with a notch, and the first recessed part and the second recessed part are connected through the notch.

[0008] In an optional embodiment, the second recessed part is provided with at least one clamping groove and at least two clamping lugs, all the clamping lugs are arranged side by side, and a clamping groove is formed between adjacent two clamping lugs, and the clamping lug and the clamping groove can be matched.

[0009] In an optional embodiment, the shape of the first protruding part is "S" type.

[0010] In an optional embodiment, the shape of the second recessed part is double-diamond, rectangular or circular.

[0011] In an optional embodiment, the adhesive film pattern structure further comprises a second protruding portion, and the second protruding portion is arranged in the first recessed portion.

[0012] In an optional embodiment, the width of the first protruding portion is 0.5mm-2mm; and / or, the depth of the first recessed portion is 0.5mm-2mm; and / or, the depth of the second recessed portion is 0.5mm-2mm; and / or, the thickness of the second protruding portion is 0.5mm-2mm.

[0013] In an optional embodiment, the thickness of the first protruding portion is 50μm-200μm; and / or, the depth of the first recessed portion is 50μm-200μm; and / or, the depth of the second recessed portion is 50μm-200μm; and / or, the thickness of the second protruding portion is 50μm-200μm.

[0014] Embodiments of the present application also provide a photovoltaic adhesive film, wherein the photovoltaic adhesive film is provided with the adhesive film pattern structure according to any one of the above embodiments.

[0015] In an optional embodiment, the number of the adhesive film pattern structures is multiple, and the multiple adhesive film pattern structures are closely arranged.

[0016] Embodiments of the present application also provide a photovoltaic module, comprising the photovoltaic adhesive film according to any one of the above embodiments.

[0017] The adhesive film pattern structure, the photovoltaic adhesive film and the photovoltaic module of the embodiments of the present application have the following beneficial effects, for example:

[0018] The adhesive film pattern structure comprises a first protruding portion, a first recessed portion and a second recessed portion, the first protruding portion is arranged around the first recessed portion, and the second recessed portion is arranged around the first protruding portion; the first protruding portion is provided with a notch, and the first recessed portion and the second recessed portion are communicated through the notch. By arranging the first recessed portion and the second recessed portion, the first recessed portion and the second recessed portion can store air, so that the adhesive films do not adhere to each other. By arranging the first protruding portion, the friction of the adhesive film can be increased, and the situation that the adhesive film slips on the glass or the situation that the battery string slips on the adhesive film can be reduced. In addition, by arranging the notch in the first protruding portion, the notch communicates the first recessed portion and the second recessed portion, so that the air in the recessed portion can be quickly discharged during the high-temperature lamination and vacuumizing process of the adhesive film, so as to reduce the bubble and delamination phenomenon. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0020] Figure 1 The schematic diagram of the adhesive film pattern structure provided in the embodiments of the present application is shown in the figure.

[0021] Figure 2 The schematic diagram of the multiple adhesive film pattern structures closely arranged provided in the embodiments of the present application is shown in the figure.

[0022] Icon: 1000-adhesive film pattern structure; 100-first protruding part; 110-notch; 200-first recessed part; 300-second recessed part; 310-clamping groove; 320-clamping lug; 400-second protruding part. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of the embodiments of the present application more clear, the following will combine the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.

[0024] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0025] It should be noted that: similar labels and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0026] In the description of the present application, it should be noted that if the terms "upper", "lower", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship of the product of the present application when it is usually placed, it is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the present application.

[0027] In addition, if the terms "first", "second" and the like are used herein, they are merely used to distinguish one entity from another, and do not imply or suggest relative importance.

[0028] It should be noted that the features in the embodiments of the present application can be combined with each other without conflict.

[0029] In recent years, the rapid development of the photovoltaic industry, especially the upgrading of component manufacturing, has driven the continuous upgrading and optimization of related industries, and the packaging material is one of them. The rapid increase in sales of double-sided double-glass components has driven the photovoltaic adhesive film to upgrade from EVA adhesive film to POE adhesive film. However, the main reason for the current rapid development of POE adhesive film is the slip problem of pure POE adhesive film. The main reason is that a large amount of polar additives are added in the POE formula, but these polar additives are not compatible with non-polar POE resin, and are easy to precipitate on the surface of the adhesive film, and at the same time cause water vapor to accumulate at the additive precipitation position, resulting in slip of the adhesive film during use and water vapor bubbles during lamination process. At the same time, the roughness of the adhesive film is not enough, which is easy to stick during production and storage, resulting in cutting and deformation of the adhesive film during use, and during high-temperature lamination and vacuumizing process, the battery piece is easy to deviate under high pressure.

[0030] Based on this, please refer to Figure 1 The adhesive film pattern structure 1000 provided in the embodiments of the present application can effectively improve the above-mentioned technical problems. The adhesive film pattern structure 1000 can ensure that the adhesive films do not stick together, and also increase the friction of the adhesive films, reduce the occurrence of slip or deviation of the adhesive films during installation. The adhesive film pattern structure 1000 is applied to the photovoltaic adhesive film, the photovoltaic adhesive film is applied to the photovoltaic component, and the photovoltaic adhesive film and the photovoltaic component with the adhesive film pattern structure 1000 both have the same functions as described above, which will not be repeated here.

[0031] The photovoltaic component in the embodiment includes photovoltaic glass, photovoltaic adhesive film, battery piece, photovoltaic adhesive film and photovoltaic back plate arranged in layers. The photovoltaic adhesive film is one of the materials of the photovoltaic component, and its main function is to bond the photovoltaic battery piece, photovoltaic glass and back plate together, to isolate external water vapor under the premise of ensuring the light transmission performance of the component, to prolong the service life of the photovoltaic component, to protect the battery piece, and to encapsulate it into a photovoltaic component that can output direct current. According to the actual application requirements of the photovoltaic component, the photovoltaic adhesive film should generally have high transparency, high adhesion, good weather resistance, easy storage, good sound insulation effect, low melting point, easy flow and other excellent performance characteristics. Of course, the photovoltaic component can also include other structures, which are determined according to the specific use scene and function, which are not limited here.

[0032] The production of photovoltaic adhesive film is generally based on resin (EVA, POE) as the main material, by adding crosslinking agent, thickening agent, antioxidant, light stabilizer, through melt extrusion, casting film to get finished product. Photovoltaic adhesive film is mainly divided into EVA adhesive film, POE adhesive film, EPE adhesive film, etc. EVA adhesive film is a functional film processed by adding crosslinking agent, coupling agent and ultraviolet resistance agent to the resin based on ethylene / vinyl acetate copolymer (commonly known as thermoplastic resin). Transparent EVA adhesive film has the characteristics of high light transmittance, anti-ultraviolet and heat yellowing, anti-snail line, good adhesion, etc. POE adhesive film is a metallocene polyethylene elastomer polymerized by ethylene and 1-hexene or 1-octene under the action of metallocene catalyst system. Compared with EVA, which releases acetic acid gas during long-term use, the molecular structure of POE is more stable, almost no gas release, and POE has higher volume resistivity and better thermal stability, ultraviolet aging resistance. The biggest advantage of POE is that its water vapor transmission rate is only about 1 / 8 of EVA and silicone, which can effectively block water vapor and better protect solar cells and inhibit the power decay of the module. Its high volume resistivity and low water permeability are one of the important characteristics of improving the PID performance of the module. Of course, POE also has disadvantages, such as poor glass bonding ability than EVA, easy to cause interface failure, long lamination time, narrow process window, easy to cause bubbles during lamination process, resulting in poor appearance, and its raw materials rely heavily on imports, so the price is relatively high.

[0033] Specifically, the photovoltaic adhesive film in the embodiment is provided with an adhesive film pattern structure 1000. The number of the adhesive film pattern structure 1000 in the embodiment is multiple, and the multiple adhesive film pattern structures 1000 are closely arranged. Each adhesive film pattern structure 1000 in the embodiment is provided with a clamping lug 320 and a clamping groove 310, and the clamping lug 320 can cooperate with the clamping groove 310. When the multiple adhesive film pattern structures 1000 are combined and arranged, the clamping lug 320 of each adhesive film pattern structure 1000 is connected with the clamping groove 310 of the adjacent adhesive film pattern structure 1000, so that the multiple adhesive film pattern structures 1000 are closely matched, so as to prevent the adhesive film from sticking together, and also increase the friction of the adhesive film, reduce the occurrence of slipping or deviation of the adhesive film during installation. In detail, the shape of the clamping groove 310 in the embodiment is "V" shape, and correspondingly, the clamping lug 320 is designed as a triangle shape matched with the clamping groove 310. Of course, the shape of the clamping groove 310 can also be designed as a semicircle, a sector, a square and other shapes, and the clamping lug 320 is designed as a corresponding shape matched with the clamping groove 310, and the shapes of the clamping groove 310 and the clamping lug 320 are not limited herein.

[0034] The thickness of the photovoltaic encapsulant film in this embodiment is 300μm to 900μm. The thickness of the photovoltaic encapsulant film can be 300μm, 350μm, 400μm, 450μm, 500μm, 550μm, 600μm, 700μm, 800μm, 900μm, etc., depending on the specific application scenario, and is not limited here.

[0035] The following is a detailed description of the 1000 adhesive film pattern structure.

[0036] Figure 1 This is a schematic diagram of the adhesive film pattern structure 1000 provided in an embodiment of the present invention, as shown below. Figure 1 As shown, the adhesive film pattern structure 1000 in this embodiment includes a first protrusion 100, a first recess 200, and a second recess 300. The first protrusion 100 surrounds the first recess 200, and the second recess 300 surrounds the first protrusion 100. The first protrusion 100 has a notch 110, and the first recess 200 and the second recess 300 are connected through the notch 110. That is, the first recess 200, the first protrusion 100, and the second recess 300 are alternately arranged, and the recesses and protrusions are alternately arranged. By providing the first recess 200 and the second recess 300, air can be stored, ensuring that the adhesive films do not stick together. By providing the first protrusion 100, the friction of the adhesive film can be increased, reducing the occurrence of slippage of the adhesive film on the glass or the occurrence of slippage of the battery string on the adhesive film. In addition, by providing a notch 110 in the first protrusion 100, the notch 110 connects the first recess 200 and the second recess 300, ensuring that the air in the recess can be quickly discharged during the high-temperature lamination and vacuuming process of the adhesive film, thereby reducing bubbles and delamination.

[0037] Please continue reading. Figure 1 In this embodiment, the first protrusion 100 is S-shaped. Designing the first protrusion 100 as S-shaped increases its area and facilitates the setting of the notch 110. Of course, the shape of the first protrusion 100 can also be square, ring, or other shapes, as long as the first protrusion 100 has the notch 110 to connect the first recess 200 and the second recess 300. The specific shape of the first protrusion 100 is not limited here. In this embodiment, the shape of the second recess 300 is double rhombus, rectangle, or circle. Of course, the second recess 300 can also be designed as a square, pentagon, triangle, or other regular or irregular shapes, etc., without limitation here. In this embodiment, the shape of the first recess 200 is square. Of course, the first recess 200 can also be designed as a triangle, ring, pentagon, or other regular or irregular shapes, etc., without limitation here.

[0038] To further increase the friction of the photovoltaic encapsulant film, please refer to [link / reference needed]. Figure 1 In this embodiment, the adhesive film pattern structure 1000 further includes a second protrusion 400, which is disposed within the first recess 200. In this embodiment, the cross-sectional shape of the second protrusion 400 is square. Of course, the cross-sectional shape of the second protrusion 400 can also be triangular, circular, rhomboid, fan-shaped, etc., and is not limited here.

[0039] Figure 2 For a schematic diagram showing the close arrangement of multiple adhesive film pattern structures 1000 provided in an embodiment of this utility model, please refer to [link / reference]. Figure 2 and in conjunction with reference Figure 1 To facilitate the tight arrangement of multiple adhesive film pattern structures 1000 on the photovoltaic film and ensure the functionality of the adhesive film pattern structure 1000, the second recess 300 in this embodiment is provided with at least one slot 310 and at least two latching lugs 320. All latching lugs 320 are arranged side by side, and a slot 310 is formed between two adjacent latching lugs 320. The latching lugs 320 and the slots 310 can cooperate. In this embodiment, there are two latching lugs 320 and one slot 310. Of course, the number of latching lugs 320 can also be three, four, five, or more, and correspondingly, the number of slots 310 can be two, three, four, or more. The number of latching lugs 320 and slots 310 is determined according to the actual arrangement on the photovoltaic film and is not limited here. In this embodiment, the slot 310 is V-shaped, and correspondingly, the latching lug 320 is designed as a triangle to cooperate with the slot 310. Of course, the shape of the slot 310 can also be designed as a semi-circle, fan-shaped, square or other shapes, and the snap-fit ​​lug 320 can be designed as a corresponding shape to match the slot 310. The shapes of the slot 310 and the snap-fit ​​lug 320 are not limited here.

[0040] To ensure the protrusions have a better ability to increase friction and the recesses can store more air, in this embodiment, the width of the first protrusion 100 is 0.5mm to 2mm; and / or, the depth of the first recess 200 is 0.5mm to 2mm; and / or, the depth of the second recess 300 is 0.5mm to 2mm; and / or, the thickness of the second protrusion 400 is 0.5mm to 2mm. The width and depth can be values ​​such as 0.5mm, 1mm, 1.5mm, and 2mm. The widths of the first protrusion 100, the second protrusion 400, the first recess 200, and the second recess 300 can also be other values, determined according to the actual length and width of the photovoltaic film, and are not limited here. In this embodiment, the thickness of the first protrusion 100 is 50μm to 200μm; and / or, the depth of the first recess 200 is 50μm to 200μm; and / or, the depth of the second recess 300 is 50μm to 200μm; and / or, the thickness of the second protrusion 400 is 50μm to 200μm. The thickness of the protrusion and the depth of the recess can be values ​​such as 50μm, 100μm, 150μm, and 200μm, and are not limited here. Of course, the thickness of the first protrusion 100 and the second protrusion 400 can also be within other ranges, and the depth of the first recess 200 and the second recess 300 can also be within other ranges, depending on the actual photovoltaic film thickness, and are not limited here.

[0041] In summary, the adhesive film pattern structure 1000 includes a first protrusion 100, a first recess 200, and a second recess 300. The first protrusion 100 surrounds the first recess 200, and the second recess 300 surrounds the first protrusion 100. The first protrusion 100 has a notch 110, and the first recess 200 and the second recess 300 are connected through the notch 110. By providing the first recess 200 and the second recess 300, air can be trapped, ensuring that the adhesive films do not stick together. By providing the first protrusion 100, the friction of the adhesive film can be increased, reducing the occurrence of slippage of the adhesive film on the glass or the occurrence of slippage of the battery string on the adhesive film. In addition, by providing a notch 110 in the first protrusion 100, the notch 110 connects the first recess 200 and the second recess 300, ensuring that the air in the recess can be quickly discharged during the high-temperature lamination and vacuuming process of the adhesive film, thereby reducing bubbles and delamination.

[0042] The above description is only a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model.

Claims

1. A film pattern structure, characterized in that, include: A first protrusion (100), a first recess (200), and a second recess (300); the first protrusion (100) is disposed around the first recess (200), and the second recess (300) is disposed around the first protrusion (100); the first protrusion (100) is provided with a notch (110), and the first recess (200) and the second recess (300) are connected through the notch (110).

2. The adhesive film pattern structure according to claim 1, characterized in that, The second recess (300) is provided with at least one slot (310) and at least two latching lugs (320). All the latching lugs (320) are arranged side by side, and a slot (310) is formed between two adjacent latching lugs (320). The latching lugs (320) and the slot (310) can cooperate.

3. The adhesive film pattern structure according to claim 1, characterized in that, The first protrusion (100) is S-shaped.

4. The adhesive film pattern structure according to claim 1, characterized in that, The second recess (300) is double rhombus, rectangle or circle.

5. The adhesive film pattern structure according to claim 1, characterized in that, The adhesive film pattern structure (1000) further includes a second protrusion (400), which is disposed within the first recess (200).

6. The adhesive film pattern structure according to claim 5, characterized in that, The width of the first protrusion (100) is 0.5 mm to 2 mm; and / or the depth of the first recess (200) is 0.5 mm to 2 mm; and / or the depth of the second recess (300) is 0.5 mm to 2 mm; and / or the thickness of the second protrusion (400) is 0.5 mm to 2 mm.

7. The adhesive film pattern structure according to claim 5, characterized in that, The thickness of the first protrusion (100) is 50 μm to 200 μm; and / or the depth of the first recess (200) is 50 μm to 200 μm; And / or, the depth of the second recess (300) is 50 μm to 200 μm; and / or, the thickness of the second protrusion (400) is 50 μm to 200 μm.

8. A photovoltaic encapsulant film, characterized in that, The photovoltaic encapsulant film is provided with the encapsulant film pattern structure (1000) as described in any one of claims 1-7.

9. The photovoltaic encapsulant film according to claim 8, characterized in that, The number of the adhesive film pattern structure (1000) is multiple, and the multiple adhesive film pattern structures (1000) are closely arranged.

10. A photovoltaic module, characterized in that, Including the photovoltaic encapsulant film as described in claim 8 or 9.

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