Adhesive film pattern structure and photovoltaic adhesive film
By designing a patterned structure with recesses and protrusions on the adhesive film, the problems of POE film slippage and adhesion were solved, the adhesion of the adhesive film was enhanced, and the yield rate of the components was ensured.
Patent Information
- Application Number
- CN202520317896.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-26
- Publication Date
- 2026-01-27
- Estimated Expiration
- 2035-02-26
AI Technical Summary
POE films are prone to slippage and adhesion during use, leading to moisture accumulation, which affects the lamination process and component yield.
Design a textured adhesive film structure, including recesses and multiple protrusions, with the recesses surrounding and interconnected with the protrusions to enhance the adhesion of the adhesive film and prevent sticking and slippage.
The textured structure of the adhesive film enhances its adhesion, preventing slippage and drift between the film and the glass or solar cells, thus improving the yield rate of the modules.
Smart Images
Figure CN223837335U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of photovoltaic encapsulant technology, and more specifically, to an encapsulant pattern structure and a photovoltaic encapsulant. Background Technology
[0002] In recent years, the rapid development of the photovoltaic industry, especially the upgrading of module manufacturing, has driven the continuous upgrading and optimization of related industries, including encapsulation materials. The rapid increase in sales of bifacial double-glass modules has led to the upgrading of photovoltaic encapsulant films from EVA films to POE films.
[0003] However, the main obstacle to the rapid development of POE films is the slippage problem of pure POE films. This is mainly because a large number of polar additives are added to the POE formulation, but these polar additives are incompatible with the non-polar POE resin and easily precipitate on the film surface. This also causes moisture to accumulate at the precipitation sites, leading to slippage during use and water bubbles during lamination. Furthermore, insufficient surface roughness of the film can cause it to become sticky during production and storage, resulting in difficulty in cutting and deformation of the film during use. Moreover, during high-temperature lamination and vacuuming, the solar cells are prone to shifting under high pressure. Utility Model Content
[0004] The purpose of this invention is to provide a patterned adhesive film structure and a photovoltaic adhesive film, which can ensure that the adhesive films do not stick together, enhance the adhesion of the adhesive films, and prevent slippage or displacement between the adhesive films and glass or solar cells.
[0005] The embodiments of this utility model can be implemented as follows:
[0006] In a first aspect, the present invention provides a film pattern structure, including a recessed portion, a first protrusion, and a second protrusion. A plurality of first protrusions are arranged around the outer side of the second protrusion and spaced apart from the second protrusion. A plurality of recessed portions are arranged around the first protrusion and the second protrusion respectively, and the plurality of recessed portions are interconnected.
[0007] In an optional embodiment, the adhesive film pattern structure further includes a third protrusion, and the recess is also arranged around the third protrusion. The two third protrusions are arranged around the outside of the second protrusion and are symmetrically arranged with the second protrusion as the center.
[0008] In an optional embodiment, the third protrusion is a triangular frustum, with one edge of the third protrusion facing the second protrusion.
[0009] In an optional embodiment, the second protrusion is shaped like a quadrilateral frustum.
[0010] In an optional embodiment, the first protrusion is in the shape of a trapezoidal frustum, and the four first protrusions are symmetrically arranged with the second protrusion as the center.
[0011] In an optional embodiment, the recessed portion is provided with a pattern.
[0012] In an optional embodiment, the pattern is formed by multiple grooves, and the depth of the pattern is 10μm-50μm.
[0013] In an optional embodiment, the thickness of the first protrusion and / or the second protrusion is 50μm-200μm.
[0014] In an optional embodiment, the thickness of the adhesive film pattern structure is 300μm-900μm.
[0015] Secondly, this utility model provides a photovoltaic encapsulant film, including the encapsulant film pattern structure described in any of the foregoing embodiments, wherein multiple encapsulant film pattern structures are spliced together.
[0016] The beneficial effects of the adhesive film pattern structure and photovoltaic adhesive film provided in this embodiment of the invention include:
[0017] The adhesive film pattern structure of this utility model includes recessed portions, first raised portions, and second raised portions. Multiple first raised portions surround the outer side of the second raised portions and are spaced apart from them. Multiple recessed portions surround the first and second raised portions respectively, and are interconnected. By providing recessed portions outside the first and second raised portions, the recessed portions can trap air, ensuring that the adhesive films do not stick together. The synergistic effect of the first and second raised portions enhances the adhesion of the adhesive film, preventing slippage or displacement between the adhesive film and the glass or solar cells. The recessed portions surrounding the first and second raised portions accelerate gas expulsion during lamination, ensuring high module yield. The adhesive film pattern structure of this photovoltaic adhesive film ensures that the adhesive films do not stick together, enhances adhesion, prevents slippage or displacement between the adhesive film and the glass or solar cells, and guarantees high product yield. Attached Figure Description
[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0019] Figure 1A schematic diagram of the adhesive film pattern structure provided in the first embodiment of this utility model;
[0020] Figure 2 This is a partial structural schematic diagram of the photovoltaic encapsulant film provided in the second embodiment of the present invention.
[0021] Icons: 1000 - Photovoltaic encapsulant film; 100 - Encapsulant film pattern structure; 10 - Recessed part; 11 - Pattern; 20 - First protrusion; 30 - Second protrusion; 40 - Third protrusion. Detailed Implementation
[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0023] 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 claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.
[0024] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0025] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed during use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0026] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.
[0027] It should be noted that, where there is no conflict, the features in the embodiments of this utility model can be combined with each other.
[0028] First Embodiment
[0029] Please refer to Figure 1 This embodiment provides a film pattern structure 100, which includes a recessed portion 10, a first protrusion 20, and a second protrusion 30. A plurality of first protrusions 20 surround the outer side of the second protrusion 30 and are spaced apart from each other. A plurality of recessed portions 10 are respectively arranged around the first protrusions 20 and the second protrusions 30, and the plurality of recessed portions 10 are interconnected. By providing recessed portions 10 outside the first protrusions 20 and the second protrusions 30, the recessed portions 10 can store air, ensuring that the films do not stick together. The synergistic effect of the first protrusions 20 and the second protrusions 30 enhances the adhesion of the film, preventing slippage or displacement between the film and the glass or battery cell. The recessed portions 10 surrounding the first protrusions 20 and the second protrusions 30 accelerate gas expulsion during the lamination process, ensuring the yield rate of the components. The patterned structure 100 of this photovoltaic encapsulant film 100 ensures that the encapsulant films do not stick together, enhances the adhesion of the encapsulant films, and prevents slippage or displacement between the encapsulant film and the glass or solar cells, thus ensuring the yield rate of the product.
[0030] It should be noted that in this embodiment, the film pattern structure 100 is a pattern 11 shape provided on the photovoltaic film 1000. The recessed portion 10 is a term relative to the first protruding portion 20 and the second protruding portion 30. It can be understood that the first protruding portion 20 and the second protruding portion 30 are protruding structures provided on the photovoltaic film 1000. The remaining surface of the photovoltaic film 1000 is composed of recessed portions 10.
[0031] Furthermore, in this embodiment, the film pattern structure 100 also includes a third protrusion 40. The recessed portion 10 is also disposed around the third protrusion 40. It is understood that the first protrusion 20, the second protrusion 30, and the third protrusion 40 are all protruding structures disposed on the photovoltaic film 1000. The remaining surface of the photovoltaic film 1000 is the recessed portion 10. In this embodiment, the number of third protrusions 40 is set to two. The two third protrusions 40 are disposed around the outer side of the second protrusion 30. The two third protrusions 40 are symmetrically arranged with the second protrusion 30 as the center. Specifically, the two third protrusions 40 are symmetrically arranged to the left and right of the second protrusion 30.
[0032] Specifically, in this embodiment, the third protrusion 40 is a triangular frustum. One edge of the third protrusion 40 is oriented towards the second protrusion 30. It is understood that the two third protrusions 40, which are symmetrical to the second protrusion 30, can enhance the stability of the adhesive film pattern structure 100, ensure the balance of friction, and further prevent slippage or displacement between the adhesive film and the glass or battery cell.
[0033] In this embodiment, the side of the third protrusion 40 is vertically oriented. That is, the cross-sectional area of the third protrusion 40 remains constant in the direction away from the surface of the photovoltaic film 1000. In other embodiments, the side of the third protrusion 40 may be sloped. That is, the cross-sectional area of the third protrusion 40 gradually decreases in the direction away from the surface of the photovoltaic film 1000.
[0034] Furthermore, the second protrusion 30 is shaped like a quadrilateral frustum. In this embodiment, the second protrusion 30 is shaped like a rhomboid frustum. In other embodiments, the second protrusion 30 can be shaped like a square frustum. Of course, in other embodiments, the second protrusion 30 can also be shaped like a ring or a cylindrical column. This utility model does not limit the specific shape of the second protrusion 30.
[0035] In this embodiment, the side of the second protrusion 30 is vertically oriented. That is, the cross-sectional area of the second protrusion 30 remains constant in the direction away from the surface of the photovoltaic film 1000. In other embodiments, the side of the second protrusion 30 may be sloped. That is, the cross-sectional area of the second protrusion 30 gradually decreases in the direction away from the surface of the photovoltaic film 1000.
[0036] Furthermore, the first protrusion 20 is shaped like a trapezoidal frustum. The four first protrusions 20 are symmetrically arranged around the center of the second protrusion 30. It can be understood that, in this embodiment, the four trapezoidal frustums are symmetrically arranged around the center of the second protrusion 30. Specifically, the four trapezoidal frustums are symmetrically arranged both vertically and horizontally relative to the second protrusion 30.
[0037] In this embodiment, the side of the first protrusion 20 is vertically oriented. That is, the cross-sectional area of the first protrusion 20 remains constant in the direction away from the surface of the photovoltaic film 1000. In other embodiments, the side of the first protrusion 20 may be sloped. That is, the cross-sectional area of the first protrusion 20 gradually decreases in the direction away from the surface of the photovoltaic film 1000.
[0038] It is understandable that the symmetrical arrangement of the first protrusion 20, the second protrusion 30 and the third protrusion 40 ensures that the width of the recess 10 between the first protrusion 20, the second protrusion 30 and the third protrusion 40 remains consistent, which facilitates air circulation in the recess 10, accelerates gas discharge during the lamination process, and ensures the yield of the product.
[0039] Since the surface of the photovoltaic film 1000 will come into contact with glass or solar cells after lamination, a pattern 11 is provided in the recessed portion 10 to increase the friction of the film. Specifically, the pattern 11 is an irregular shape. In this embodiment, the pattern 11 is a straight stripe. In other embodiments, the pattern 11 can be a curved stripe or a zigzag stripe, etc. As long as it can increase the friction of the film, this utility model does not limit the specific shape and type of the pattern 11.
[0040] In this embodiment, the pattern 11 is formed by multiple grooves. It is understood that the surface of the recessed portion 10 is grooved to form the pattern 11 shape. Specifically, the depth of the pattern 11 is 10μm-50μm. The specific depth of the pattern 11 can be determined according to the thickness of the photovoltaic film 1000; this invention does not limit the specific depth of the pattern 11.
[0041] Furthermore, the thickness of the first protrusion 20 and / or the second protrusion 30 is 50μm-200μm. It can be understood that the thickness of the first protrusion 20 and the second protrusion 30 refers to the distance between the surface of the first protrusion 20 and the second protrusion 30 and the surface of the recess 10.
[0042] In this embodiment, the thickness of the third protrusion 40 is also set to 50μm-200μm. The thickness of the third protrusion 40 refers to the distance between the surface of the third protrusion 40 and the surface of the recess 10. This utility model does not limit the specific thickness of the first protrusion 20, the second protrusion 30, and the third protrusion 40.
[0043] Furthermore, the thickness of the encapsulant film pattern structure 100 is 300μm-900μm. It can be understood that the encapsulant film pattern structure 100 refers to the smallest repeating shape unit cut from the photovoltaic encapsulant film 1000; that is, the encapsulant film pattern structure 100 is a partial structure of the photovoltaic encapsulant film 1000. In other words, the thickness of the photovoltaic encapsulant film 1000 is also 300μm-900μm. This invention does not limit the specific thickness of the photovoltaic encapsulant film 1000; it can be selected or set according to specific needs.
[0044] Second Embodiment
[0045] Please refer to Figure 2 , Figure 2 This is a partial structural diagram of the photovoltaic encapsulant film 1000, specifically a structural diagram showing the interlocking of multiple encapsulant film pattern structures 100.
[0046] The photovoltaic encapsulant film 1000 includes the encapsulant pattern structure 100 described in the first embodiment. Multiple encapsulant pattern structures 100 are spliced together. It is understood that the encapsulant pattern structure 100 refers to the smallest repeating shape unit cut from the photovoltaic encapsulant film 1000; that is, the encapsulant pattern structure 100 is a partial structure of the photovoltaic encapsulant film 1000. In this embodiment, the encapsulant pattern structure 100 is set as a hexagon. One side of one encapsulant pattern structure 100 is connected to one side of another encapsulant pattern structure 100, and then sequentially connected to the sides of other encapsulant pattern structures 100 to form the photovoltaic encapsulant film 1000.
[0047] The beneficial effects of the adhesive film pattern structure 100 and the photovoltaic adhesive film 1000 provided in this embodiment of the invention include:
[0048] The adhesive film pattern structure 100 of this utility model includes a recessed portion 10, a first protrusion 20, and a second protrusion 30. Multiple first protrusions 20 surround the outer side of the second protrusions 30 and are spaced apart from them. Multiple recessed portions 10 are respectively arranged around the first protrusions 20 and the second protrusions 30, and are interconnected. By providing recessed portions 10 outside the first and second protrusions 20 and 30, the recessed portions 10 can store air, ensuring that the adhesive films do not stick together. The synergistic effect of the first and second protrusions 20 and 30 enhances the adhesion of the adhesive film, preventing slippage or displacement between the adhesive film and the glass or battery cells. The recessed portions 10 surrounding the first and second protrusions 20 and 30 accelerate gas expulsion during the lamination process, ensuring a high yield rate for the components. The patterned structure 100 of this photovoltaic encapsulant film 100 ensures that the encapsulant films do not stick together, enhances the adhesion of the encapsulant films, and prevents slippage or displacement between the encapsulant film and the glass or solar cells, thus ensuring the yield rate of the product.
[0049] 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 (100), characterized in that, It includes a recessed portion (10), a first protrusion (20) and a second protrusion (30). A plurality of first protrusions (20) surround the outer side of the second protrusion (30) and are spaced apart from the second protrusion (30). A plurality of recessed portions (10) are respectively arranged around the first protrusion (20) and the second protrusion (30), and the plurality of recessed portions (10) are interconnected.
2. The adhesive film pattern structure (100) according to claim 1, characterized in that, The adhesive film pattern structure (100) also includes a third protrusion (40), and the recess (10) is also arranged around the third protrusion (40). The two third protrusions (40) are arranged around the outside of the second protrusion (30), and the two third protrusions (40) are symmetrically arranged with the second protrusion (30) as the center.
3. The adhesive film pattern structure (100) according to claim 2, characterized in that, The third protrusion (40) is a triangular frustum, and one of the edges of the third protrusion (40) is oriented toward the second protrusion (30).
4. The adhesive film pattern structure (100) according to claim 1, characterized in that, The second protrusion (30) is in the shape of a quadrilateral frustum.
5. The adhesive film pattern structure (100) according to claim 1, characterized in that, The first protrusion (20) is in the shape of a trapezoidal frustum, and the four first protrusions (20) are symmetrically arranged with the second protrusion (30) as the center.
6. The adhesive film pattern structure (100) according to claim 1, characterized in that, The recessed portion (10) is provided with a pattern (11).
7. The adhesive film pattern structure (100) according to claim 6, characterized in that, The pattern (11) is formed by multiple grooves, and the depth of the pattern (11) is 10μm-50μm.
8. The adhesive film pattern structure (100) according to claim 1, characterized in that, The thickness of the first protrusion (20) and / or the second protrusion (30) is 50μm-200μm.
9. The adhesive film pattern structure (100) according to claim 1, characterized in that, The thickness of the adhesive film pattern structure (100) is 300μm-900μm.
10. A photovoltaic encapsulant film (1000), characterized in that, Includes the adhesive film pattern structure (100) according to any one of claims 1-9, wherein a plurality of the adhesive film pattern structures (100) are spliced together.