Photovoltaic synergistic film with high-reflectivity matte coating

Abstract

The utility model relates to the technical field of H01L31 / 00, in particular to a photovoltaic synergistic film with a high-reflectivity matte coating. The photovoltaic synergistic film sequentially comprises a high-reflectivity matte coating, a base material layer and an adhesive layer from top to bottom. According to the utility model, the photovoltaic synergistic film is formed by combining the high-reflectivity matte coating, the base material layer and the adhesive layer with specific thickness, the film reflectivity of the photovoltaic synergistic film is greater than or equal to 80%, and the generating capacity gain is greater than or equal to 1.8%; according to the utility model, the adhesive layer is arranged, so that the photovoltaic synergistic film with the high-reflectivity matte coating has convenience in installation and wide applicability, can meet the requirements of actual installation and use, and is prevented from falling off.

Description

Technical Field

[0001] The utility model relates to the H01L31 / 00 technical field, in particular to a photovoltaic efficiency enhancement film with a matte coating with high reflectivity. Background Art

[0002] As technology advances and the global population grows, the demand for renewable energy has increased dramatically around the world. The growing demand for electricity generated by solar energy has been accompanied by a growing demand for devices and materials that can meet the requirements of these applications. In photovoltaic module design, the tab strips represent inactive shadow areas (areas where incident light is not absorbed for photovoltaic or photoelectric conversion). Due to the presence of these inactive shadow areas, the total active surface area (the total area where incident light is used for photovoltaic or photoelectric conversion) in the photovoltaic module is less than 100% of the original photovoltaic cell area. Therefore, the amount of current that can be generated by the photovoltaic module is reduced due to the presence of inactive shadow areas, resulting in reduced output power.

[0003] A Chinese patent with patent application number CN201822244771.1 discloses a photovoltaic module. Specifically, during the assembly process of the photovoltaic module, the light utilization rate is improved by setting a light reflective film on the side of one side of the second packaging film. However, the weather resistance of the photovoltaic enhancement film is poor and it is easy to produce yellowing problems in a short period of time, resulting in a decrease in the efficiency of the photovoltaic enhancement film or even structural damage, and it cannot play a role in enhancing efficiency.

[0004] Therefore, providing a matte coating photovoltaic efficiency-enhancing film with high reflectivity and good weather resistance is the main technical problem that needs to be solved at present. Utility Model Content

[0005] In order to solve the above problems, the utility model provides a photovoltaic efficiency-enhancing film with a high-reflectivity matte coating, which comprises, from top to bottom, a high-reflectivity matte coating, a substrate layer, and an adhesive layer.

[0006] In one embodiment, the high reflectivity matte coating is coated with ink to obtain a structural layer.

[0007] In one embodiment, the high reflectivity matte coating layer is connected to the substrate layer by coating.

[0008] The ink can be purchased from manufacturers including the ECO STAR series inks of Jiangmen Toyo Ink Co., Ltd.

[0009] The utility model coats ink on the substrate layer so that the sunlight irradiated on the gap between the battery cells and the surface of the welding strip is reflected to the surface of the photovoltaic cell through secondary reflection, thereby improving the utilization rate of light energy and increasing the total output power of the battery module.

[0010] The adhesive layer is coated on the other side of the substrate layer by laminating.

[0011] In one embodiment, the high reflectivity matte coating has a thickness of 10-30 μm.

[0012] In one embodiment, the high reflectivity matte coating has a thickness of 15-25 μm.

[0013] In one embodiment, the high reflectivity matte coating has a thickness of 20-25 μm.

[0014] In one embodiment, the substrate layer is a transparent PET film or a PET white film.

[0015] In one embodiment, the substrate layer is made of PET white film, and the PET white film is purchased from PET white film WF05C from Shanghai Hongyu Chemical Technology Co., Ltd.

[0016] In one embodiment, the substrate layer has a thickness of 10-100 μm.

[0017] In one embodiment, the substrate layer has a thickness of 12-50 μm.

[0018] In one embodiment, the thickness of the adhesive layer is 30-80 μm.

[0019] In one embodiment, the thickness of the adhesive layer is 45-55 μm.

[0020] In one embodiment, the thickness of the adhesive layer is 50 μm.

[0021] In order to improve the film reflectivity and power generation gain value of the photovoltaic efficiency-enhancing film, the inventors found in the research and development process of the photovoltaic efficiency-enhancing film that the thickness of the high-reflectivity matte coating is 10-30μm, the thickness of the substrate layer is 10-100μm, and the thickness of the adhesive layer is 30-80μm. In particular, the thickness of the high-reflectivity matte coating is 20-25μm, the thickness of the substrate layer is 12-50μm, and the thickness of the adhesive layer is 45-55μm. The film reflectivity of the photovoltaic efficiency-enhancing film is ≥80%, and the power generation gain is ≥1.8%.

[0022] The adhesive layer is made of hot melt adhesive, and the hot melt adhesive is purchased from DuPont EVA265 in the United States.

[0023] The utility model provides a photovoltaic efficiency-enhancing film with a high-reflectivity matte coating by setting an adhesive layer, so that the film has convenient installation and wide applicability, can meet the requirements of actual installation and use, and can avoid falling off.

[0024] Beneficial Effects

[0025] 1. The photovoltaic efficiency-enhancing film formed by combining a high-reflectivity matte coating layer, a substrate layer, and an adhesive layer of a specific thickness has excellent weather resistance and high promotion and application value.

[0026] 2. The utility model applies ink on the substrate layer so that the sunlight irradiated on the gap between the battery cells and the surface of the welding strip is reflected to the surface of the photovoltaic cell for the second time, thereby improving the utilization rate of light energy and increasing the total output power of the battery module.

[0027] 3. The utility model forms a photovoltaic efficiency-enhancing film by combining a high-reflectivity matte coating layer of a specific thickness, a substrate layer, and an adhesive layer. The reflectivity of the photovoltaic efficiency-enhancing film is ≥80%, and the power generation gain is ≥1.8%.

[0028] 4. The utility model provides a photovoltaic efficiency-enhancing film with a high-reflectivity matte coating by setting an adhesive layer, so that the film has convenient installation and wide applicability, can meet the requirements of actual installation and use, and avoid falling off. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A schematic diagram of the structure of a photovoltaic efficiency-enhancing film with a high-reflectivity matte coating is provided.

[0030] Figure 1 Middle: ① high reflectivity matte coating, ② substrate layer, ③ adhesive layer. DETAILED DESCRIPTION

[0031] Figure 1 A schematic diagram of the structure of the photovoltaic efficiency-enhancing film with a high-reflectivity matte coating provided in Examples 1-5 is provided.

[0032] The high reflectivity matte coating layer 1 is connected to the substrate layer 2 by coating.

[0033] The adhesive layer 3 is coated on the other side of the substrate layer 2 by lamination.

[0034] The high reflectivity matte coating 1 is coated with ink to obtain a structural layer.

[0035] Example 1

[0036] This embodiment provides a photovoltaic efficiency-enhancing film with a high-reflectivity matte coating, which comprises, from top to bottom, a high-reflectivity matte coating 1, a substrate layer 2, and an adhesive layer 3.

[0037] The thickness of the high reflectivity matte coating 1 is 15 μm.

[0038] The thickness of the substrate layer 2 is 50 μm.

[0039] The thickness of the adhesive layer 3 is 50 μm.

[0040] The high reflectivity matte coating 1 is coated with ink to obtain a structural layer.

[0041] The ink was purchased from Jiangmen Toyo Ink Co., Ltd.'s ECO STAR series ink.

[0042] The substrate layer 2 is made of PET white film.

[0043] The PET white film was purchased from PET white film WF05C from Shanghai Hongyu Chemical Technology Co., Ltd.

[0044] The adhesive layer 3 is made of hot melt adhesive, and the hot melt adhesive is purchased from DuPont EVA265 in the United States.

[0045] Example 2

[0046] This embodiment provides a photovoltaic efficiency-enhancing film with a high-reflectivity matte coating, which comprises, from top to bottom, a high-reflectivity matte coating 1, a substrate layer 2, and an adhesive layer 3.

[0047] The thickness of the high reflectivity matte coating 1 is 15 μm.

[0048] The thickness of the substrate layer 2 is 25 μm.

[0049] The thickness of the adhesive layer 3 is 50 μm.

[0050] The high reflectivity matte coating 1 is coated with ink to obtain a structural layer.

[0051] The material types and purchasing manufacturers of the high-reflectivity matte coating, substrate layer, and adhesive layer are the same as those in Example 1.

[0052] Example 3

[0053] This embodiment provides a photovoltaic efficiency-enhancing film with a high-reflectivity matte coating, which comprises, from top to bottom, a high-reflectivity matte coating 1, a substrate layer 2, and an adhesive layer 3.

[0054] The thickness of the high reflectivity matte coating 1 is 20 μm.

[0055] The thickness of the substrate layer 2 is 50 μm.

[0056] The thickness of the adhesive layer 3 is 50 μm.

[0057] The high reflectivity matte coating 1 is coated with ink to obtain a structural layer.

[0058] The material types and purchasing manufacturers of the high-reflectivity matte coating, substrate layer, and adhesive layer are the same as those in Example 1.

[0059] Example 4

[0060] This embodiment provides a photovoltaic efficiency-enhancing film with a high-reflectivity matte coating, which comprises, from top to bottom, a high-reflectivity matte coating 1, a substrate layer 2, and an adhesive layer 3.

[0061] The thickness of the high reflectivity matte coating 1 is 20 μm.

[0062] The thickness of the substrate layer 2 is 12 μm.

[0063] The thickness of the adhesive layer 3 is 50 μm.

[0064] The high reflectivity matte coating 1 is coated with ink to obtain a structural layer.

[0065] The material types and purchasing manufacturers of the high-reflectivity matte coating, substrate layer, and adhesive layer are the same as those in Example 1.

[0066] Example 5

[0067] This embodiment provides a photovoltaic efficiency-enhancing film with a high-reflectivity matte coating, which comprises, from top to bottom, a high-reflectivity matte coating 1, a substrate layer 2, and an adhesive layer 3.

[0068] The thickness of the high reflectivity matte coating 1 is 25 μm.

[0069] The thickness of the substrate layer 2 is 36 μm.

[0070] The thickness of the adhesive layer 3 is 50 μm.

[0071] The high reflectivity matte coating 1 is coated with ink to obtain a structural layer.

[0072] The material types and purchasing manufacturers of the high-reflectivity matte coating, substrate layer, and adhesive layer are the same as those in Example 1.

[0073] Performance Testing

[0074] 1. Film reflectivity test

[0075] Photovoltaic efficiency-enhancing film is used for solar cell modules. The reflectivity test of the photovoltaic efficiency-enhancing film provided in the example was carried out according to GB / T 20503-2006. The results are shown in Table 1.

[0076] 2. Power generation gain test

[0077] The power generation gain rate refers to the rate of increase in the total output power of the photovoltaic module by the photovoltaic efficiency enhancement film. The photovoltaic efficiency enhancement film is used for solar cell modules. The efficiency of the photovoltaic module is measured according to the method provided in GB / T 39857-2021. The power generation gain rate is obtained by comparing the blank test data. The results are shown in Table 1.

[0078] Table 1

[0079] Test items Example 1 Example 2 Example 3 Example 4 Example 5 Film reflectivity (%) 78 75 82 80 80 Power generation gain rate (%) 1.7 1.6 2.0 1.8 1.9

Claims

1. A photovoltaic efficiency enhancement film having a high reflectivity matte coating, characterized in that: From top to bottom, it includes a high-reflectivity matte coating (1), a substrate layer (2), and an adhesive layer (3); The thickness of the high reflectivity matte coating (1) is 20-25 μm; The substrate layer (2) is a transparent PET film or a PET white film; The thickness of the substrate layer (2) is 12-50 μm; The thickness of the adhesive layer (3) is 50 μm; The high reflectivity matte coating (1) is connected to the substrate layer (2) by coating; The adhesive layer (3) is coated on the other side of the substrate layer (2) by lamination; The high reflectivity matte coating (1) is coated with ink to obtain a structural layer.

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