Photovoltaic adhesive film and photovoltaic module
By designing pattern layers of different thicknesses on the photovoltaic adhesive film, the problem of bubbles generated during adhesion and lamination of the photovoltaic adhesive film after winding is solved, and higher anti-adhesion performance and stability are achieved.
Patent Information
- Application Number
- CN202421975021.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-14
- Publication Date
- 2025-06-06
- Estimated Expiration
- 2034-08-14
AI Technical Summary
Existing photovoltaic films are prone to stick after being cured, and bubbles are easily generated during the lamination process, affecting the performance of photovoltaic modules.
A photovoltaic adhesive film is designed, which includes first and second pattern layers of different thicknesses. The thickness of the first pattern layer is 100 to 300 um, and the thickness of the second pattern layer is 50 to 100 um. These patterns help reduce adhesions and bubble generation, and quickly drain the air by forming airflow channels.
It effectively reduces the adhesion during the film rolling process, and reduces the generation of bubbles during the lamination process, improving the anti-adhesion performance and stability of the photovoltaic film.
Smart Images
Figure CN222954310U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of photovoltaics, and in particular to a photovoltaic adhesive film and a photovoltaic component. Background Art
[0002] The solar photovoltaic films currently in use require the addition of various modification additives and are then extruded into thin films after being heated.
[0003] Since the film has a certain degree of stickiness, after rolling, the layers may stick together, which brings inconvenience to packaging and cutting. It is also easy to generate bubbles during lamination, which in turn affects the performance of photovoltaic modules. Utility Model Content
[0004] The utility model provides a photovoltaic adhesive film and a photovoltaic module, which can reduce the adhesion during the film rolling process and can quickly discharge air during the lamination process to reduce the generation of lamination bubbles.
[0005] The embodiments of the present invention can be implemented as follows:
[0006] The embodiment of the utility model provides a photovoltaic adhesive film, which includes:
[0007] The photovoltaic adhesive film comprises an adhesive film body and a first pattern layer and a second pattern layer convexly arranged on one side surface of the adhesive film body, and the first pattern layer and the second pattern layer have different thicknesses.
[0008] In an optional embodiment, the thickness of the first pattern layer is 100-300 um, and the thickness of the second pattern layer is 50-100 um.
[0009] In an optional embodiment, the first pattern layer has an alternating concave-convex pattern inside.
[0010] In an optional implementation, the depth difference of the alternating concave-convex pattern is 50-200 um, and the width of the alternating concave-convex pattern is 0.5-2 mm.
[0011] In an optional embodiment, the first pattern layer is in a spiral shape.
[0012] In an optional embodiment, the second pattern layer includes circular protrusions and / or square protrusions.
[0013] In an optional embodiment, there are multiple first pattern layers, and the multiple first pattern layers are arranged in an array, and two adjacent first pattern layers are alternately concave or convex.
[0014] In an optional implementation, the depth difference between two adjacent first pattern layers is 10-100 um.
[0015] In an optional embodiment, the interval between two adjacent first pattern layers is 1-2 mm.
[0016] An embodiment of the utility model further provides a photovoltaic module, comprising a battery cell and the photovoltaic adhesive film described in any one of the above embodiments, wherein the battery cell is tightly attached to the photovoltaic adhesive film, and an air flow channel is formed through the first pattern layer and the second pattern layer.
[0017] The beneficial effects of the photovoltaic film and photovoltaic module of the embodiment of the utility model include:
[0018] The photovoltaic film includes a film body and a first pattern layer and a second pattern layer convexly arranged on one side of the film body, and the first pattern layer and the second pattern layer have different thicknesses. By setting two pattern layers of different thicknesses, it is helpful to retain more air between the films after the photovoltaic film is rolled up, so that it is less likely to stick together, and the adhesion during the film rolling process is reduced, so as to improve the anti-adhesion performance of the photovoltaic film and ensure the stability of the photovoltaic film during storage and transportation. In addition, due to the provision of two pattern layers of different thicknesses, the photovoltaic film will form an airflow channel with the battery cell during the lamination process, and the air can be quickly discharged, thereby reducing the generation of lamination bubbles. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.
[0020] Figure 1 A schematic diagram of a photovoltaic module provided in an embodiment of the present utility model;
[0021] Figure 2 A schematic diagram of a photovoltaic adhesive film provided in an embodiment of the utility model;
[0022] Figure 3 It is a schematic diagram of a partial structure of a photovoltaic film provided in an embodiment of the present utility model.
[0023] Icon: 1000-photovoltaic film; 100-film body; 200-first pattern layer; 210-alternating concave-convex pattern; 300-second pattern layer; 400-air flow channel; 2000-battery cell. DETAILED DESCRIPTION
[0024] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.
[0025] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0026] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.
[0027] In the description of the present utility model, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the utility model product is usually placed when used. It is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present utility model.
[0028] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.
[0029] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.
[0030] The solar photovoltaic film currently used needs to be added with various modification additives and then extruded into a thin film after heating. Since the film has a certain viscosity, after rolling up, the layers may stick together, which brings inconvenience to packaging and cutting. And during lamination, bubbles are easily generated, which in turn affects the performance of photovoltaic modules.
[0031] Based on this, see Figure 1 , Figure 2 and Figure 3The photovoltaic film 1000 provided in the embodiment of the utility model can effectively improve the above-mentioned technical problems. The photovoltaic film 1000 can reduce the adhesion during the film rolling process, and can quickly discharge the air during the lamination process to reduce the generation of lamination bubbles. The photovoltaic film 1000 of this embodiment is applied to photovoltaic modules, and the photovoltaic modules with the photovoltaic film 1000 have the same functions as the above-mentioned photovoltaic film 1000, which will not be described in detail here.
[0032] Figure 1 A schematic diagram of a photovoltaic module provided in an embodiment of the present utility model is shown in FIG. Figure 1 As shown, the photovoltaic module of this embodiment includes a cell 2000 and a photovoltaic film 1000, the cell 2000 is closely attached to the photovoltaic film 1000, and an airflow channel 400 is formed through the first pattern layer 200 and the second pattern layer 300. During the lamination process of the photovoltaic film 1000 and the cell 2000, air can be quickly discharged from the airflow channel 400 to reduce the generation of lamination bubbles.
[0033] Figure 2 A schematic diagram of a photovoltaic adhesive film 1000 provided in an embodiment of the present utility model; Figure 3 This is a schematic diagram of a partial structure of a photovoltaic adhesive film 1000 provided in an embodiment of the present utility model, please refer to Figure 2 and Figure 3 The photovoltaic film 1000 in this embodiment includes a film body 100 and a first pattern layer 200 and a second pattern layer 300 convexly disposed on one side of the film body 100. The first pattern layer 200 and the second pattern layer 300 have different thicknesses. By providing two pattern layers with different thicknesses, it is helpful to retain more air between the films of the photovoltaic film 1000 after the film 1000 is rolled up, so that it is less likely to stick together, and the sticking situation during the film rolling process is reduced, so as to improve the anti-sticking performance of the photovoltaic film 1000 and ensure the stability of the photovoltaic film 1000 during storage and transportation. In addition, due to the provision of two pattern layers with different thicknesses, the photovoltaic film 1000 will form an airflow channel 400 with the battery cell 2000 during the lamination process, which can quickly discharge the air, thereby reducing the generation of lamination bubbles.
[0034] Specifically, in this embodiment, the thickness of the first pattern layer 200 is 100-300um, and the thickness of the second pattern layer 300 is 50-100um. For example, when the thickness of the first pattern layer 200 is 100um, the thickness of the second pattern layer 300 is 50um. When selecting the thickness of the first pattern layer 200 and the second pattern layer 300, it is necessary to ensure that the values selected by the two are different. Of course, the thickness of the first pattern layer 200 and the second pattern layer 300 can also be other values, as long as the thickness of the first pattern layer 200 and the thickness of the second pattern layer 300 are not inconsistent, and no limitation is made here.
[0035] In order to further reduce the situation that the photovoltaic adhesive film 1000 is easy to stick, the second pattern layer 300 in this embodiment includes circular protrusions and / or square protrusions. The second pattern layer 300 may include only circular protrusions or only square protrusions, or may include both circular protrusions and square protrusions. Of course, the second pattern layer 300 may also include one or more of protrusions in other shapes such as some polygons or some irregular polygons, which are not limited here.
[0036] The photovoltaic film 1000 in this embodiment is made of POE material. As a polyolefin elastomer, POE film has the following significant advantages: excellent weather resistance, ozone resistance, and resistance to ultraviolet light aging: the relative molecular weight distribution of POE film is narrow, and it is not easy to warp and deform during processing and molding. Compared with traditional chemically cross-linked rubber, it has lower cost, lighter weight, lower energy consumption, and is more environmentally friendly to obtain elasticity. Good water vapor barrier: POE film has excellent water vapor barrier, which can greatly improve the anti-PID performance and avoid the weaknesses of EVA film. Its water vapor permeability is only about 1 / 8 of that of EVA film, and POE film will not decompose and produce acetic acid when it comes into contact with water, which can effectively reduce the PID effect and improve the service life and power generation efficiency of photovoltaic modules. Of course, the photovoltaic film 1000 can also be made of other materials such as EVA, which is determined according to actual conditions and is not limited here.
[0037] Since POE resin is a non-polar material, a variety of additives such as cross-linking agents, auxiliary cross-linking agents, silane coupling agents and other polar liquids need to be added to the photovoltaic film 1000 formula system to achieve the purpose of cross-linking and bonding. However, polar and non-polar substances are incompatible in themselves. The additives absorbed into the resin can easily precipitate from the resin to the surface of the film under high temperature and high humidity conditions, resulting in the film being transferred parallel to the component production line. It is easy to cause slippage between the cell 2000 and the film or between the glass and the film, and the distance between the cells 2000 is abnormal, affecting the production line production rhythm and reducing production efficiency. On the other hand, if the surface roughness of the photovoltaic film 1000 is not enough, it will easily become sticky during production and storage, resulting in unchanged cutting and deformation of the photovoltaic film 1000 during use, and the cell 2000 is prone to displacement under high pressure during high-temperature lamination and vacuuming.
[0038] In order to reduce the displacement of the solar cell 2000 relative to the photovoltaic film 1000 after installation, please continue to refer to Figure 2 and Figure 3, the first pattern layer 200 in this embodiment has an alternating concave-convex pattern 210 inside. Specifically, the depth difference of the alternating concave-convex pattern 210 in this embodiment is 50-200um, and the width of the alternating concave-convex pattern 210 is 0.5-2mm. The depth difference of the alternating concave-convex pattern 210 in this embodiment is 100um, and the width of the alternating concave-convex pattern 210 is 1mm. Of course, the depth difference and width of the alternating concave-convex pattern 210 can also be values within other value ranges, which are determined according to actual conditions and are not limited here. By providing an alternating concave-convex pattern 210 in the first pattern layer 200, the liquid additive precipitated from the photovoltaic film 1000 can be stored in the alternating concave-convex pattern to reduce the difference in cross-linking degree of the liquid additive in the long-term storage film. The degree of cross-linking of the film is a physical quantity used to characterize the degree of cross-linking of the film. Its size not only determines the mechanical properties such as peel strength and tensile strength of the film after curing, but also affects the environmental aging performance of photovoltaic modules, and plays a vital role in the quality and life of photovoltaic modules.
[0039] Please continue reading Figure 2 and Figure 3 , the shape of the first pattern layer 200 in this embodiment is spiral. The first pattern layer 200 includes a first circle structure and a second circle structure connected from the inside to the outside in sequence, and the first circle structure and the second circle structure are arranged at intervals. The first circle structure and the second circle structure are both provided with alternating concave-convex patterns 210. The spiral first pattern layer 200 in this embodiment is a spiral with a right-angle corner, and of course it can also be a circular spiral structure similar to a spring, which is not limited here. A first air channel is formed inside the alternating concave-convex pattern 210, and a second air channel is formed at the interval between the first circle structure and the second circle structure. Multiple air flow channels 400 can ensure that the air in the photovoltaic module can be quickly discharged during the high-temperature lamination process of the photovoltaic film 1000 to reduce the generation of lamination bubbles. In addition, the first pattern layer 200 can also be designed as other shapes with intervals to increase the air flow channel 400, and the specific shape is not limited here.
[0040] In order to further prevent the cell 2000 from slipping relative to the photovoltaic film 1000, please refer to Figure 2 and Figure 3In this embodiment, there are multiple first pattern layers 200, and the multiple first pattern layers 200 are arranged in an array, and two adjacent first pattern layers 200 are alternately concave or convex. The interval between two adjacent first pattern layers 200 is 1 to 2 mm. The depth difference between two adjacent first pattern layers 200 is 10 to 100 um. By setting up alternately concave or convex pattern layers, the phenomenon of adhesion between layers can be avoided. In this embodiment, four first pattern layers 200 adjacent to each other in two vertical rows are grouped, and one of the first pattern layers 200 is a minimum unit spiral structure. The four first pattern layers 200 are symmetrical in pairs. Through such a symmetrical arrangement, it is convenient for the precipitated liquid additive to preferentially flow into the alternating concave and convex pattern 210 structure in the first pattern layer 200.
[0041] The distance between the secondary grids of a conventional cell 2000 is generally 1 mm, and the distance between the main grids is generally 1 to 1.1 mm. In order to ensure that the photovoltaic film 1000 can fit tightly with the cell 2000, the width of the alternating concave-convex pattern 210 in this embodiment is 1 mm, and the welding wire on the secondary grid of the cell 2000 can fit with the spiral pattern in the smallest unit, and the welding wire falls inside the alternating concave-convex pattern 210 structure. In addition, the thicker welding strip on the main grid of the cell 2000 can be located in the gap between two adjacent first pattern layers 200 to achieve a tight fit between the cell 2000 and the photovoltaic film 1000, thereby minimizing the sliding of the cell 2000 on the surface of the photovoltaic film 1000 during the reproduction process and reducing the displacement of the cell 2000 under pressure during the lamination process.
[0042] The thickness of the photovoltaic film 1000 has an important influence on the packaging effect. Generally, the thicker the photovoltaic film 1000 is, the better its insulation performance is, but it will also increase the difficulty of packaging. Therefore, the thickness of the photovoltaic film 1000 may be reasonably selected according to actual conditions. The thickness of the photovoltaic film 1000 in this embodiment is 400 to 800 um. Of course, the thickness of the photovoltaic film 1000 may also be other values, which are not limited here.
[0043] In summary, the photovoltaic film 1000 includes a film body 100 and a first pattern layer 200 and a second pattern layer 300 convexly disposed on one side of the film body 100, and the first pattern layer 200 and the second pattern layer 300 have different thicknesses. By providing two pattern layers with different thicknesses, it is helpful to retain more air between the films of the photovoltaic film 1000 after the film is rolled up, so that it is less likely to stick together, and the sticking situation during the film rolling process is reduced, so as to improve the anti-sticking performance of the photovoltaic film 1000 and ensure the stability of the photovoltaic film 1000 during storage and transportation. In addition, due to the provision of two pattern layers with different thicknesses, the photovoltaic film 1000 will form an airflow channel 400 with the battery cell 2000 during the lamination process, which can quickly discharge the air, thereby reducing the generation of lamination bubbles.
[0044] The above is only a specific implementation of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed in the present invention should be included in the protection scope of the present invention.
Claims
1. A photovoltaic film, characterized in that: The photovoltaic adhesive film (1000) comprises an adhesive film body (100) and a first pattern layer (200) and a second pattern layer (300) convexly arranged on a surface of one side of the adhesive film body (100); the first pattern layer (200) and the second pattern layer (300) have different thicknesses.
2. The photovoltaic adhesive film according to claim 1, characterized in that: The thickness of the first pattern layer (200) is 100-300 um, and the thickness of the second pattern layer (300) is 50-100 um.
3. The photovoltaic adhesive film according to claim 1, characterized in that: The first pattern layer (200) has an alternating concave-convex pattern (210) inside.
4. The photovoltaic adhesive film according to claim 3, characterized in that: The depth difference of the alternating concave-convex pattern (210) is 50-200 um, and the width of the alternating concave-convex pattern (210) is 0.5-2 mm.
5. The photovoltaic adhesive film according to claim 1, characterized in that: The first pattern layer (200) is in a spiral shape.
6. The photovoltaic adhesive film according to claim 1, characterized in that: The second pattern layer (300) includes circular protrusions and / or square protrusions.
7. The photovoltaic adhesive film according to claim 1, characterized in that: The number of the first pattern layers (200) is plural, and the plurality of the first pattern layers (200) are arranged in an array, and two adjacent first pattern layers (200) are alternately concave or convex.
8. The photovoltaic adhesive film according to claim 7, characterized in that: The depth difference between two adjacent first pattern layers (200) is 10-100 um.
9. The photovoltaic adhesive film according to claim 7, characterized in that: The spacing distance between two adjacent first pattern layers (200) is 1 to 2 mm.
10. A photovoltaic module, characterized in that: It comprises a battery cell (2000) and the photovoltaic adhesive film (1000) according to any one of claims 1 to 9, wherein the battery cell (2000) is tightly attached to the photovoltaic adhesive film (1000), and an air flow channel (400) is formed through the first patterned layer (200) and the second patterned layer (300).