Anti-sticking laminated aluminum frame for photovoltaic lamination and application

Abstract

The invention relates to an anti-sticking laminated aluminum frame for photovoltaic lamination and application. The nanorod array comprises a frame and a nanorod array, the frame is of a square closed-loop structure and can fix and support a laminated structure of the photovoltaic module; the frame is formed by connecting a plurality of rectangular aluminum materials end to end; the nanopillar array is arranged on the first side surface of the frame; the first side surface is a contact surface of the aluminum frame and the laminated structure; one end of the nanorod array is connected with the first side surface; the other end of the nanorod array is in contact with the laminated structure; the nano column array comprises a plurality of nano columns; intervals are arranged among the plurality of nano-columns, so that the nano-column array has pores; and the porosity of the nanorod array is 60 to 80 percent. The technical problem to be solved is how to provide a laminated aluminum frame capable of preventing glue film from overflowing and adhering.

Description

Technical Field

[0001] This invention belongs to the field of photovoltaic module technology, and in particular relates to an anti-stick laminated aluminum frame for photovoltaic lamination and its application. Background Technology

[0002] Photovoltaic lamination is a core step in the production of solar cell modules. Its purpose is to firmly bond multiple layers of materials (such as glass, EVA film, solar cells, and backsheets) under high temperature and pressure to form a sealed, weather-resistant photovoltaic module. Among these components, the laminated aluminum frame is the most important, as it supports and fixes the stacked structure of the photovoltaic module (such as glass, EVA film, solar cells, and backsheets), ensuring that the stacked structure remains stable and flat under high temperature and pressure.

[0003] However, during the high-temperature and high-pressure production process, excess adhesive will be generated during lamination. This excess adhesive will come into contact with the laminated aluminum frame. Since the traditional aluminum frame is not coated with an anti-adhesion coating, the overflowing butyl adhesive and film will directly adhere to the surface of the aluminum frame. This will require additional external force when the module is demolded, which can easily cause edge damage or microcracks in the cells, resulting in a low yield rate of the module. Summary of the Invention

[0004] The main objective of this invention is to provide an anti-stick laminated aluminum frame for photovoltaic lamination and its application. The technical problem to be solved is how to provide a laminated aluminum frame that can prevent adhesive film from overflowing and sticking together.

[0005] The objective of this invention and the technical problem it solves are achieved by the following technical solution. According to this invention, an anti-stick laminated aluminum frame for photovoltaic lamination comprises: a frame and a nanopillar array; The frame is a square closed-loop structure that can fix and support the stacked structure of photovoltaic modules; the frame is composed of several rectangular aluminum materials connected end to end. The nanopillar array is disposed on a first side of the frame; the first side is the contact surface between the frame and the stacked structure; one end of the nanopillar array is connected to the first side; the other end of the nanopillar array is in contact with the stacked structure; the nanopillar array includes a plurality of nanopillars; there are gaps between the plurality of nanopillars, so that the nanopillar array has pores; the porosity of the nanopillar array is 60-80%; the ratio of the contact area between the first side and the adhesive film in the stacked structure to the first side is ≤10%.

[0006] Preferably, in the aforementioned non-stick laminated aluminum frame for photovoltaic lamination, the nanopillar array only contacts the adhesive film in the laminated structure; the height of the nanopillar array is 9 mm.

[0007] Preferably, in the aforementioned non-stick laminated aluminum frame for photovoltaic lamination, the nanopillars are vertically disposed on the first side; the nanopillars and the frame are integrally formed.

[0008] Preferably, in the aforementioned non-stick laminated aluminum frame for photovoltaic lamination, the nanopillars are obtained by anodizing the frame.

[0009] Preferably, in the aforementioned non-stick laminated aluminum frame for photovoltaic lamination, the diameter of the nanopillars is 50-200 nm and the height is 1-3 μm; the spacing between any two adjacent nanopillars is 100-300 nm.

[0010] Preferably, in the aforementioned non-stick laminated aluminum frame for photovoltaic lamination, the contact surface between the nanopillars and the laminated structure is hemispherical; the radius of the hemisphere is 20–50 nm.

[0011] Preferably, in the aforementioned non-stick laminated aluminum frame for photovoltaic lamination, the nanopillars have no chemical coating on their surface.

[0012] The objective of this invention and the solution to its technical problem are further achieved by the following technical solution. A lamination method for a photovoltaic module according to this invention includes the following steps: Photovoltaic modules are laminated using aluminum frames, with the lamination temperature controlled at 140–160°C, followed by demolding. The aluminum frame comprises: a frame and a nanopillar array; The frame is a square closed-loop structure that can fix and support the stacked structure of the photovoltaic modules; the frame is composed of several rectangular aluminum materials connected end to end. The nanopillar array is disposed on a first side of the frame; the first side is the contact surface between the aluminum frame and the laminated structure; one end of the nanopillar array is connected to the first side; the other end of the nanopillar array is in contact with the laminated structure; the nanopillar array includes a plurality of nanopillars; there are gaps between the plurality of nanopillars, so that the nanopillar array has pores; the porosity of the nanopillar array is 60-80%; the ratio of the contact area between the first side and the adhesive film in the laminated structure to the first side is ≤10%.

[0013] Preferably, in the aforementioned lamination method, the lamination temperature is 150°C; the demolding temperature is 150°C.

[0014] Preferably, in the aforementioned lamination method, the aluminum frame is the aforementioned aluminum frame.

[0015] By employing the above technical solution, the present invention provides an anti-stick laminated aluminum frame for photovoltaic lamination and its application, which has at least the following advantages: This invention discloses a nanopillar array disposed on the first side of an aluminum frame, which is composed of a number of nanopillars arranged in an orderly manner at certain intervals. These intervals enable the nanopillar array to have a porous structure. During the demolding process, gas exists within the pores. When demolding is performed at a temperature of 150°C, the gas within the pores will expand due to heat, thereby generating a uniform and stable auxiliary separation force, further optimizing the demolding effect, making the demolding process more stable and smooth, and reducing the demolding difficulty and defect rate.

[0016] The nanopillar array disclosed in this invention can control the contact area between the first side and the adhesive film in the laminated structure to within ≤10%, which can greatly reduce the adhesion between the aluminum frame and the adhesive film in the laminated structure, effectively reduce demolding resistance, make the components easier to separate after lamination, improve production efficiency, reduce component damage caused by adhesion, and ensure product quality.

[0017] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, the preferred embodiments of the present invention are described in detail below. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the aluminum frame structure according to an embodiment of the present invention.

[0019] Figure 2 This is a schematic diagram of the aluminum frame structure according to an embodiment of the present invention.

[0020] Figure 3 This is a schematic diagram of the nanopillar array described in an embodiment of the present invention.

[0021] Among them, 1 is an aluminum frame, 2 is a frame, 21 is a first side surface, 3 is a nanopillar array, and 31 is a nanopillar. Detailed Implementation

[0022] To further illustrate the technical means and effects adopted by the present invention to achieve the intended purpose, the following, in conjunction with the accompanying drawings and preferred embodiments, details the specific implementation, structure, features, and effects of an anti-stick laminated aluminum frame for photovoltaic lamination and its application according to the present invention. In the following description, different "embodiments" or "embodiments" do not necessarily refer to the same embodiment. Furthermore, specific features, structures, or characteristics in one or more embodiments can be combined in any suitable form.

[0023] This invention proposes an anti-stick laminated aluminum frame 1 for photovoltaic lamination, such as... Figure 1 and Figure 2 As shown, it includes: a frame 2 and a nanopillar array 3; The frame 2 is a square closed-loop structure that can fix and support the stacked structure of photovoltaic modules; the frame 2 is composed of several rectangular aluminum materials connected end to end. The nanopillar array 3 is disposed on the first side surface 21 of the frame 2; the first side surface 21 is the contact surface between the frame 2 and the stacked structure; one end of the nanopillar array 3 is connected to the first side surface 21; the other end of the nanopillar array 3 is in contact with the stacked structure; the nanopillar array 3 includes a plurality of nanopillars 31; there are gaps between the plurality of nanopillars 31, so that the nanopillar array 3 has pores; the porosity of the nanopillar array 3 is 60-80%; the ratio of the contact area between the first side surface 21 and the adhesive film in the stacked structure to the first side surface 21 is ≤10%.

[0024] The present invention discloses that the aluminum frame 1 has a square closed-loop structure, which can provide stable and reliable fixation and support for the photovoltaic module stacked structure, ensuring that the module position is fixed during the lamination process and reducing quality problems caused by shaking or displacement.

[0025] The frame 2 of the aluminum frame 1 disclosed in this invention is composed of rectangular aluminum materials connected end to end. The materials are widely available, have low cost, and are easy to assemble and adjust flexibly according to different size requirements, thus improving the versatility and applicability of the aluminum frame 1.

[0026] It is worth noting that the aluminum material disclosed in this invention can be aluminum metal or aluminum alloy, etc. The specifications of the aluminum frame 1 disclosed in this invention are common specifications on the market. For example, the typical size of a 60-cell solar cell module may be 1650mm × 992mm × 35mm (length × width × height, including aluminum frame 1), and the size of a 72-cell solar cell module may be 1956mm × 992mm × 35mm (length × width × height, including aluminum frame 1). The specific specifications can be determined according to the laminated photovoltaic module.

[0027] Compared to the traditional aluminum frame 1 directly contacting the photovoltaic module, this invention discloses that a nanopillar array 3 is set on the contact surface between the aluminum frame 1 and the photovoltaic module, and a contact method of "aluminum frame 1-nanopillar array 3-photovoltaic module" is adopted to achieve the purpose of anti-sticking and optimized demolding.

[0028] The nanopillar array 3 disclosed in this invention is composed of a number of nanopillars 31, with a gap between two adjacent nanopillars 31, so that the nanopillar array 3 forms a porous structure and the porosity is controlled at 60-80%, so that there is enough gas in the pores to expand when heated during demolding, thereby generating a uniform auxiliary separation force, making the demolding process smoother and more stable, reducing demolding difficulty and defect rate.

[0029] Compared to the traditional method where the contact area between the first side 21 and the adhesive film in the laminated structure is 100%, the present invention, by setting the nanopillar array 3 on the first side 21, can reduce the ratio of the contact area between the first side 21 and the adhesive film in the laminated structure to the first side 21 to ≤10%, which is 90% less than the prior art. This greatly reduces the adhesion area between the aluminum frame 1 and the adhesive film in the laminated structure, effectively reduces demolding resistance, makes the components easier to separate after lamination, significantly improves production efficiency, and reduces component damage caused by adhesion, thus ensuring product quality.

[0030] Preferably, in the aforementioned anti-stick laminated aluminum frame 1 for photovoltaic lamination, the nanopillar array only contacts the adhesive film in the laminated structure; the height of the nanopillar array is 9 mm.

[0031] like Figure 3 As shown, this invention discloses a nanopillar array 3 that only contacts the adhesive film layer. That is, the nanopillar array 3 is only positioned in the area in contact with the adhesive film layer, precisely targeting the areas requiring anti-sticking and avoiding unnecessary impact on other structures. This invention limits the height of the nanopillar array to 9mm, ensuring sufficient contact with the adhesive film for effective anti-sticking without compromising the overall component structure and lamination effect due to excessive height.

[0032] Preferably, in the aforementioned non-stick laminated aluminum frame 1 for photovoltaic lamination, the nanopillars 31 are vertically disposed on the first side 21; the nanopillars 31 and the frame 2 are integrally formed.

[0033] This invention defines the nanopillars 31 perpendicular to the first side surface 21, ensuring the uniformity and stability of the contact between the nanopillars 31 and the stacked structure, resulting in a more uniform distribution of the auxiliary separation force. The integrally molded structure enhances the connection strength between the nanopillars 31 and the frame 2, preventing the nanopillars 31 from loosening or falling off during use, and improving the reliability and service life of the aluminum frame 1.

[0034] It is worth noting that the integral molding structure of nanopillar 31 and frame 2 disclosed in this invention means that nanopillar 31 and frame 2 are integral, and not that nanopillar 31 is set on frame 2 by welding or other installation methods.

[0035] Preferably, in the aforementioned non-stick laminated aluminum frame 1 for photovoltaic lamination, the nanopillars 31 are obtained by anodizing the frame 2.

[0036] This invention discloses a method for preparing nanopillars 31 using an anodic oxidation process. This method can form an oxide film on the surface of nanopillars 31, which can further improve the surface properties of nanopillars 31, increase their hardness, wear resistance and corrosion resistance, and enhance the overall performance of the nanopillar array 31.

[0037] It is worth noting that the oxidation process disclosed in this invention is existing technology.

[0038] Preferably, in the aforementioned non-stick laminated aluminum frame 1 for photovoltaic lamination, the diameter of the nanopillars 31 is 50-200 nm and the height is 1-3 μm; the spacing between any two adjacent nanopillars 31 is 100-300 nm.

[0039] This invention discloses the diameter, height, and spacing of the nanopillars 31. These parameters work together to ensure that the nanopillar array 31 can form a suitable pore structure while maintaining sufficient strength and stability, so as to achieve the best gas expansion-assisted demolding effect and the minimum contact area, thereby optimizing the anti-sticking and demolding performance.

[0040] Preferably, in the aforementioned non-stick laminated aluminum frame 1 for photovoltaic lamination, the contact surface between the nanopillars 31 and the laminated structure is hemispherical; the radius of the hemispherical shape is 20-50 nm.

[0041] The hemispherical contact surface reduces friction and stress concentration between the nanopillars 31 and the stacked structure, making the contact smoother and further reducing the possibility of adhesion. It also helps to evenly disperse the auxiliary separation force and improve the smoothness of demolding.

[0042] Preferably, in the aforementioned non-stick laminated aluminum frame 1 for photovoltaic lamination, the surface of the nanopillars 31 is free of chemical coating.

[0043] This avoids the pollution problems that chemical coatings may cause, ensuring the purity and environmental friendliness of the photovoltaic modules. At the same time, it reduces performance degradation caused by coating peeling or aging, lowers maintenance costs, and improves the long-term stability of aluminum frame 1.

[0044] This invention also proposes a lamination method for photovoltaic modules, the steps of which include: The photovoltaic module is laminated using aluminum frame 1, with the lamination temperature controlled at 140-160℃, and then demolded. The aluminum frame 1 includes: a frame 2 and a nanopillar array 3; The frame 2 is a square closed-loop structure that can fix and support the stacked structure of the photovoltaic module; the frame 2 is composed of several rectangular aluminum materials connected end to end. The nanopillar array 3 is disposed on the first side surface 21 of the frame 2; the first side surface 21 is the contact surface between the aluminum frame 1 and the stacked structure; one end of the nanopillar array 3 is connected to the first side surface 21; the other end of the nanopillar array 3 is in contact with the stacked structure; the nanopillar array 3 includes a plurality of nanopillars 31; there are gaps between the plurality of nanopillars 31, so that the nanopillar array 3 has pores; the porosity of the nanopillar array 3 is 60-80%; the ratio of the contact area between the first side surface 21 and the adhesive film in the stacked structure to the first side surface 21 is ≤10%.

[0045] Preferably, in the aforementioned lamination method, the lamination temperature is 150°C; the demolding temperature is 150°C.

[0046] By precisely setting the lamination temperature and demolding temperature to 150℃, the performance of the adhesive film, the expansion characteristics of the gas in the nanopillar array 3, and the interaction between the aluminum frame 1 and the stacked structure can achieve the best balance at this specific temperature, further optimizing the lamination and demolding effects and improving production efficiency and product quality stability.

[0047] Preferably, in the aforementioned lamination method, the aluminum frame 1 is the aforementioned aluminum frame 1.

[0048] The present invention will be further described below with reference to specific embodiments, but this should not be construed as a limitation on the scope of protection of the present invention. Some non-essential improvements and adjustments made by those skilled in the art based on the above description of the present invention still fall within the scope of protection of the present invention.

[0049] Unless otherwise specified, all materials and reagents mentioned below are commercially available products well known to those skilled in the art; unless otherwise specified, all methods described are methods known in the art. Unless otherwise defined, the technical or scientific terms used should have the ordinary meaning understood by those skilled in the art to which this invention pertains.

[0050] Example 1 An anti-stick laminated aluminum frame for photovoltaic lamination, comprising: a frame and an array of nanopillars; The frame is a square closed-loop structure that can fix and support the stacked structure of photovoltaic modules; the frame is composed of several rectangular aluminum materials connected end to end. The nanopillar array is disposed on the first side of the frame; the nanopillars and the frame are integrally formed; the first side is the contact surface between the frame and the stacked structure; one end of the nanopillar array is connected to the first side; the other end of the nanopillar array contacts the stacked structure; the nanopillar array includes a plurality of nanopillars; there are gaps between the plurality of nanopillars, so that the nanopillar array has pores; the porosity of the nanopillar array is 60%; the ratio of the contact area between the first side and the adhesive film in the stacked structure to the first side is ≤10%; the nanopillar array only contacts the adhesive film in the stacked structure; the height of the nanopillar array is 9mm; the diameter of the nanopillar is 50nm and the height is 1μm; the spacing between any two adjacent nanopillars is 100nm; the contact surface between the nanopillar and the stacked structure is hemispherical; the radius of the hemisphere is 20nm; the surface of the nanopillar has no chemical coating. The nanopillars are obtained by anodizing the framework. Specifically, 6061 aluminum alloy is anodized with oxalic acid (40V, 30min) and then expanded with phosphoric acid (5wt% phosphoric acid, 10min).

[0051] Example 2 An anti-stick laminated aluminum frame for photovoltaic lamination, comprising: a frame and an array of nanopillars; The frame is a square closed-loop structure that can fix and support the stacked structure of photovoltaic modules; the frame is composed of several rectangular aluminum materials connected end to end. The nanopillar array is disposed on the first side of the frame; the nanopillars and the frame are integrally formed; the first side is the contact surface between the frame and the stacked structure; one end of the nanopillar array is connected to the first side; the other end of the nanopillar array contacts the stacked structure; the nanopillar array includes a plurality of nanopillars; there are gaps between the plurality of nanopillars, so that the nanopillar array has pores; the porosity of the nanopillar array is 70%; the ratio of the contact area between the first side and the adhesive film in the stacked structure to the first side is ≤10%; the nanopillar array only contacts the adhesive film in the stacked structure; the height of the nanopillar array is 9 mm; the diameter of the nanopillar is 100 nm and the height is 2 μm; the spacing between any two adjacent nanopillars is 200 nm; the contact surface between the nanopillar and the stacked structure is hemispherical; the radius of the hemisphere is 30 nm; the surface of the nanopillar has no chemical coating. The nanopillars are obtained by anodizing the framework. Specifically, 6061 aluminum alloy is anodized with oxalic acid (40V, 30min) and then expanded with phosphoric acid (5wt% phosphoric acid, 10min).

[0052] Example 3 An anti-stick laminated aluminum frame for photovoltaic lamination, comprising: a frame and an array of nanopillars; The frame is a square closed-loop structure that can fix and support the stacked structure of photovoltaic modules; the frame is composed of several rectangular aluminum materials connected end to end. The nanopillar array is disposed on the first side of the frame; the nanopillars and the frame are integrally formed; the first side is the contact surface between the frame and the stacked structure; one end of the nanopillar array is connected to the first side; the other end of the nanopillar array contacts the stacked structure; the nanopillar array includes a plurality of nanopillars; there are gaps between the plurality of nanopillars, so that the nanopillar array has pores; the porosity of the nanopillar array is 80%; the ratio of the contact area between the first side and the adhesive film in the stacked structure to the first side is ≤10%; the nanopillar array only contacts the adhesive film in the stacked structure; the height of the nanopillar array is 9 mm; the diameter of the nanopillar is 200 nm and the height is 3 μm; the spacing between any two adjacent nanopillars is 300 nm; the contact surface between the nanopillar and the stacked structure is hemispherical; the radius of the hemisphere is 50 nm; the surface of the nanopillar has no chemical coating. The nanopillars are obtained by anodizing the framework. Specifically, 6061 aluminum alloy is anodized with oxalic acid (40V, 30min) and then expanded with phosphoric acid (5wt% phosphoric acid, 10min).

[0053] Comparative Example 1 Compared to Example 1, Comparative Example 1 used only a bare 6061 aluminum frame of the same specifications and was cleaned with acetone.

[0054] Test method: The aluminum frames of Example 1 and Comparative Example 1 were laminated using the following lamination parameters: Adhesive film: Butyl rubber (viscosity 5000±300Pa·s, conforming to GB / T 29595) Temperature: 135℃ Pressure: 0.8 MPa Time: 15min Evaluation criteria: Demolding force: Vertical pull-out using a universal testing machine (ISO 6134) Residual amount: Xylene dissolution and weighing method (GB / T 2790 Appendix B) The test results are as follows: Example 1 significantly outperformed Comparative Example 1 in all four core performance indicators: average demolding force decreased by 80.8% (55.2 N in Example 1, 287 N in Comparative Example 1), adhesive residue decreased by 97.2% (0.09 mg / cm² in Example 1, 3.2 mg / cm² in Comparative Example 1), aluminum frame life increased by 16 times (>800 cycles in Example 1, 50 cycles in Comparative Example 1), and production yield increased by 5.5% (99.6% in Example 1, 94.1% in Comparative Example 1). This is because traditional uncoated aluminum frames have micron-level defects (Ra = 0.4-1.2 μm) on their surface. During lamination, molten butyl adhesive (viscosity drops to 120 Pa·s at 135°C) penetrates these defects, forming mechanical lock-up, which leads to the following problems: 1. The release force increases dramatically, even reaching the theoretical limit of adhesion force, which can be expressed by the formula: F=τ×A Where τ represents the shear strength, which is 0.5 MPa; A represents the contact area, which is assumed to be 100% here; and the calculated theoretical adhesion force F is 500 N.

[0055] 2. The problem of adhesive residue is serious and irreversible, and it must be removed by mechanical cleaning, but this process often damages the surface of the aluminum frame.

[0056] 3. The lifespan of the aluminum frame is significantly shortened, and plastic deformation occurs after only 50 cycles.

[0057] Compared to Comparative Example 1, Embodiment 1 of this invention discloses a nanopillar array on the contact surface between the frame and the laminated structure. One end of the nanopillar array is connected to the first side surface, and the other end contacts the laminated structure. Then, by utilizing several nanopillars on the nanopillar array, the ratio of the contact area between the frame and the adhesive film in the laminated structure to the first side surface is ≤10%, far lower than the contact area of ​​the aluminum frame in Comparative Example 1 (contact area is 100%). Furthermore, the nanopillars disclosed in this invention are spaced apart, creating pores in the nanopillar array. The porosity of the nanopillar array is 60-80%. During lamination, gas will be present in the pores. During the lamination heating process, the gas in the pores expands. At 135°C, its expansion rate is approximately 35%, and the locally generated gas pressure is >0.12 MPa (> butyl rubber osmotic pressure), thereby assisting demolding and improving demolding efficiency. A comparison of the contact area models of the aluminum frames in Embodiment 1 and Comparative Example 1 yields the following results: Figure 1As shown (vertical axis represents demolding force in N; horizontal axis represents number of cycles in times), Example 1 uses nanopillar contact (discrete point contact) with a contact area ≤10%, and its demolding force is stable in the range of 54.2-65.0N. After 100 cycles, it only increases by 21.3% (slope 0.114N / cycle). In contrast, Comparative Example 1 uses continuous surface contact with a contact area of ​​100%, which causes its demolding force to increase from 293.5N to 346.0N, with an accelerated upward trend (slope >6 N / 10 cycles in the later stage). It can be seen that the nanopillar structure disclosed in this invention has long-term stability, and the demolding force of traditional aluminum frames continues to deteriorate due to the accumulation of adhesive residue.

[0058] In summary, the laminated aluminum frame disclosed in this invention can reduce demolding force by 80.8%, reduce adhesive residue by 97.2%, and significantly extend the service life of the aluminum frame to over 800 cycles (compared to only 50 cycles for aluminum frames using traditional methods). During the lamination process of traditional aluminum frames, butyl adhesive can seep into defective areas on their surface (see relevant comparative models). Figure 1 This leads to mechanical locking, causing a series of problems. The innovation of this invention lies in the use of a nanopillar structure. This structure, through the geometric confinement contact principle (strictly controlling the actual contact area to 10% or less) and the air cushion effect (utilizing the expansion characteristics of gas in the pores under high temperature), works synergistically to successfully overcome the long-standing technical problem of adhesion that has plagued the industry.

[0059] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0060] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A non-stick laminated aluminum frame for photovoltaic lamination, characterized in that, It includes: Framework and nanopillar array; The frame is a square closed-loop structure that can fix and support the stacked structure of photovoltaic modules; the frame is composed of several rectangular aluminum materials connected end to end. The nanopillar array is disposed on a first side of the frame; the first side is the contact surface between the frame and the stacked structure; one end of the nanopillar array is connected to the first side; the other end of the nanopillar array is in contact with the stacked structure; the nanopillar array includes a plurality of nanopillars; there are gaps between the plurality of nanopillars, so that the nanopillar array has pores; the porosity of the nanopillar array is 60-80%; the ratio of the contact area between the first side and the adhesive film in the stacked structure to the first side is ≤10%.

2. The anti-stick laminated aluminum frame for photovoltaic lamination according to claim 1, characterized in that, The nanopillar array is in contact only with the adhesive film in the stacked structure; the height of the nanopillar array is 9 mm.

3. The anti-stick laminated aluminum frame for photovoltaic lamination according to claim 1, characterized in that, The nanopillars are vertically arranged on the first side; the nanopillars and the frame are integrally formed.

4. The anti-stick laminated aluminum frame for photovoltaic lamination according to claim 3, characterized in that, The nanopillars are obtained by anodizing the framework.

5. The anti-stick laminated aluminum frame for photovoltaic lamination according to claim 1, characterized in that, The nanopillars have a diameter of 50–200 nm and a height of 1–3 μm; the spacing between any two adjacent nanopillars is 100–300 nm.

6. The anti-stick laminated aluminum frame for photovoltaic lamination according to claim 5, characterized in that, The contact surface between the nanopillar and the stacked structure is hemispherical; the radius of the hemispherical shape is 20-50 nm.

7. The anti-stick laminated aluminum frame for photovoltaic lamination according to any one of claims 1 to 6, characterized in that, The surface of the nanopillars has no chemical coating.

8. A lamination method for photovoltaic modules, characterized in that, The steps include: Photovoltaic modules are laminated using aluminum frames, with the lamination temperature controlled at 140–160°C, followed by demolding. The aluminum frame comprises: a frame and a nanopillar array; The frame is a square closed-loop structure that can fix and support the stacked structure of the photovoltaic modules; the frame is composed of several rectangular aluminum materials connected end to end. The nanopillar array is disposed on a first side of the frame; the first side is the contact surface between the aluminum frame and the laminated structure; one end of the nanopillar array is connected to the first side; the other end of the nanopillar array is in contact with the laminated structure; the nanopillar array includes a plurality of nanopillars; there are gaps between the plurality of nanopillars, so that the nanopillar array has pores; the porosity of the nanopillar array is 60-80%; the ratio of the contact area between the first side and the adhesive film in the laminated structure to the first side is ≤10%.

9. The lamination method according to claim 8, characterized in that, The lamination temperature is 150°C; the demolding temperature is 150°C.

10. The lamination method according to claim 8 or 9, characterized in that, The aluminum frame is the aluminum frame as described in any one of claims 1 to 7.

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