Integrated flexible transparent sheet and photovoltaic cell

Abstract

The utility model relates to the field of photovoltaic cell sheets, in particular to an integrated flexible transparent sheet and a photovoltaic cell, and the integrated flexible transparent sheet is formed by sequentially arranging a flexible air surface layer, an adhesive film layer and a transparent structure enhancement layer. The integrated light flexible sheet provided by the utility model is integrally formed, so that the production time of the sheet is greatly shortened, the sheet has excellent mechanical property and high transparency, and a photovoltaic cell applying the sheet has the characteristic of light weight, so that the transportation cost of the sheet is greatly reduced, and the production cost of the photovoltaic cell is greatly reduced. The weight of the photovoltaic cell is reduced, and the load of a building is reduced. In addition, the flexible air surface layer is a flexible film, the glossiness of the flexible air surface layer can be reduced through embossing, light pollution is reduced, and the attractiveness is improved.

Description

Technical Field

[0001] The utility model relates to the field of photovoltaic cell sheets, in particular to an integrated flexible transparent sheet and a photovoltaic cell. Background Art

[0002] As people's demand for green energy continues to expand, the development of the photovoltaic cell industry has received widespread attention. In the field of photovoltaic cells, in order to fully protect the cells, each manufacturer will set up front panels and back panels on both sides of the cells to deal with the impact of hail, rain or other debris on the cells. At present, with the development of the photovoltaic industry, the demand for photovoltaic cells has increased significantly, and the production of photovoltaic cell sheets faces great challenges, because general sheets are multi-layer structures, and the multi-layer structures need to be laminated layer by layer, rolled and other processes to be compounded layer by layer, which seriously affects the production efficiency of the sheets.

[0003] In order to ensure the service life of photovoltaic cells, the front plate or back plate of photovoltaic cells needs to have excellent weather resistance, mechanical properties, and dustproof performance. In addition, in order to ensure the power generation of photovoltaic cells, the transparency of the sheet is also required to be relatively high. In addition, more and more photovoltaic cell users have put forward higher requirements for the aesthetics of photovoltaic cells. Utility Model Content

[0004] The purpose of the utility model is to provide an integrated flexible transparent sheet material to simultaneously solve the above-mentioned technical problems and promote the further development of the photovoltaic industry. The sheet material is composed of a flexible air surface layer, a film layer, and a transparent structure reinforcement layer arranged in sequence.

[0005] As an optional solution for an integrated flexible transparent sheet, the flexible air surface layer is a composite structure of one or more layers of PVF, PVDF, PCTFE, ECTFE, ETFE, THV, and FEP films; further, the thickness of the flexible air surface layer is 25-50 μm.

[0006] As an optional solution for an integrated flexible transparent sheet, the adhesive film layer is a composite film of one or more of EVA, TPU, TPO, POE, and PVB; further, the adhesive film layer has a thickness of 20-500 μm.

[0007] As an optional solution for an integrated flexible transparent sheet, the transparent structure reinforcement layer is connected in sequence by a first adhesive layer, a PET layer, and a second adhesive layer; further, the transparent structure reinforcement layer has a thickness of 100-1000 μm.

[0008] As an optional solution for an integrated flexible transparent sheet, the first bonding layer and the second bonding layer are mixed coatings containing functional resin and glue; the functional resin is one or more of polyvinylidene fluoride resin, FEVE resin, PVF resin, fluorine-containing acrylic resin, silicone resin and its copolymerization modification, acrylic resin and its copolymerization modification; the thickness of the first bonding layer and the second bonding layer is 10-50um.

[0009] As an optional solution for an integrated flexible transparent sheet, the PET layer has a thickness of 20-400 μm.

[0010] As an optional solution for an integrated flexible transparent sheet, the transparent structural reinforcement layer is a glass fiber layer impregnated with a polymer material, and the refractive index of the polymer material is 1.5-1.7.

[0011] As an optional solution for an integrated flexible transparent sheet, the transparent structural reinforcement layer is a polycarbonate layer.

[0012] Another object of the present invention is to provide a photovoltaic cell using the integrated flexible transparent sheet described in any of the above solutions.

[0013] Beneficial effects of the utility model:

[0014] The integrated lightweight flexible sheet provided by the utility model, the sheet in the present application is integratedly formed, which greatly reduces the production time of the sheet, and has excellent mechanical properties and high transparency. Due to its light weight, the transportation cost of the sheet is greatly reduced.

[0015] The photovoltaic cell using the sheet of the utility model is light in weight and can significantly reduce the load of the building. In addition, the flexible air surface layer in the present application is a flexible film, and the glossiness of the flexible air surface layer can be reduced by embossing, thereby reducing light pollution, improving aesthetics, and meeting the aesthetic needs of users. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] FIG1 is a general diagram of an integrated flexible transparent sheet structure provided by a specific embodiment of the present utility model;

[0017] FIG2 is a structural diagram of a transparent structure reinforcement layer of an integrated flexible transparent sheet provided in a specific embodiment of the present utility model;

[0018] 1. Flexible air surface

[0019] 2. Film layer

[0020] 3. Transparent structural reinforcement layer

[0021] 31. First bonding layer

[0022] 32. PET layer

[0023] 33. Second bonding layer. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the solution of the utility model, the following will be combined with the accompanying drawings to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0025] As shown in Figures 1 and 2: This embodiment provides an integrated flexible transparent sheet, which is composed of a flexible air surface layer 1, a film layer 2, and a transparent structure reinforcement layer 3 arranged in sequence; the sheet structure provided by the present application can not only realize integrated production, but also greatly improve production efficiency. Compared with sheets made of glass material, the sheet provided by the present application has the characteristics of lightness, which increases the use scenarios and load pressure of the product in application places.

[0026] In order to achieve embossing, thereby reducing light pollution and providing sufficient dustproof and weather-resistant capabilities, as an optional solution for an integrated flexible transparent sheet, the flexible air surface layer is a composite structure of one or more layers of PVF, PVDF, PCTFE, ECTFE, ETFE, THV, and FEP films; further, the thickness of the flexible air surface layer is 25-50 μm.

[0027] In order to improve the mechanical structural properties of the sheet and achieve a stable connection between the flexible air surface layer and the transparent structural reinforcement layer, as an optional solution for an integrated lightweight transparent sheet, the adhesive film layer 2 is a composite film of one or more of EVA, TPU, POE, TPO, and PVB; further, the adhesive film layer 2 has a thickness of 20-500 μm.

[0028] In order to improve the impact resistance of the sheet and improve the impact resistance of the sheet, as an optional solution for an integrated lightweight transparent sheet, the transparent structural reinforcement layer 3 is connected by a first adhesive layer 31, a PET layer 32, and a second adhesive layer 33 in sequence.

[0029] In order to prevent cracking between the layers of the sheet, improve the integrity of the sheet, and ensure the mechanical properties of the sheet to the greatest extent, as an optional solution for an integrated lightweight transparent sheet, the first bonding layer 31, the second bonding layer 33 and are all mixed coatings containing functional resin and glue. The functional resin is one or more of polyvinylidene fluoride resin, FEVE resin, PVF resin, fluorine-containing acrylic resin, silicone resin and its copolymerization modification, acrylic resin and its copolymerization modification; the thickness of the first bonding layer 31 and the second bonding layer 33 is 10-50um.

[0030] In order to give full play to the function of the transparent structure-reinforced layer and realize the supporting role of the transparent structure-reinforced layer, as an optional solution for an integrated lightweight transparent sheet, the thickness of the PET layer 32 is 20-400 μm.

[0031] In order to provide a sheet with high transparency and strong mechanical properties, as an optional solution for an integrated lightweight transparent sheet, the transparent structural reinforcement layer 3 is a glass fiber layer impregnated with a polymer material, and the refractive index of the polymer material is 1.5-1.7.

[0032] In order to ensure the transparency and strong mechanical properties of the sheet, as an optional solution for an integrated lightweight transparent sheet, the transparent structural reinforcement layer 3 is a polycarbonate layer.

[0033] Example 1

[0034] An integrated flexible transparent sheet material is composed of a flexible air surface layer 1, a film layer 2, and a transparent structural reinforcement layer 3 arranged in sequence; the flexible air surface layer 1 is a PVDF film; the thickness of the flexible air surface layer 1 is 30μm; the film layer 2 is an EVA film; the thickness of the film layer is 30μm. The structural reinforcement layer is connected by a first adhesive layer 31, a PET layer 32, and a second adhesive layer 33 in sequence; the thickness of the transparent structural reinforcement layer is 500μm.

[0035] The first adhesive layer 31 and the second adhesive layer 33 are both mixed coatings containing functional resin and polyurethane glue, with a mixing ratio of 4:6; the functional resin is a mixture of polyvinylidene fluoride resin and silicone resin, with a mixing ratio of 1:1; the thickness of the first adhesive layer and the second adhesive layer is 15um. The thickness of the PET layer is 100μm.

[0036] Example 2

[0037] An integrated flexible transparent sheet material is composed of a flexible air surface layer 1, a film layer 2, and a transparent structure reinforcement layer 3 arranged in sequence; the flexible air surface layer 1 is a PVF film; the thickness of the flexible air surface layer 1 is 35μm; the film layer 2 is a POE composite film; the thickness of the film layer is 50μm. The transparent structure reinforcement layer 3 is a polycarbonate layer; the thickness is 500μm.

[0038] Example 3

[0039] An integrated flexible transparent sheet material is composed of a flexible air surface layer 1, a film layer 2, and a transparent structure reinforcement layer 3 arranged in sequence; the flexible air surface layer 1 is a PVF film; the flexible air

[0040] The thickness of the air surface layer 1 is 50 μm; a glue layer 4 is also provided between the external protective layer and the adhesive film layer, and the glue layer 4 is 5 μm. The adhesive film layer 2 is a POE adhesive film; the thickness of the adhesive film layer is 400 μm.

[0041] The structural reinforcement layer is a glass fiber layer impregnated with resin having a refractive index of 1.61 and a thickness of 350 μm.

[0042] Although the preferred embodiments of the utility model have been described, those skilled in the art may make additional changes and modifications to these embodiments once they are aware of the basic creative concepts. Therefore, the attached claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the embodiments of the utility model. The technical solution provided by the utility model is described in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the utility model. The description of the above embodiments is only used to help understand the method of the utility model and its core idea. At the same time, for those of ordinary skill in the art, according to the idea of ​​the utility model, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the utility model.

Claims

1. An integrated flexible transparent sheet, characterized in that: The sheet material is composed of a flexible air surface layer, a film layer, and a transparent structural reinforcement layer arranged in sequence; The flexible air surface layer is one or more layers of PVF, PVDF, PCTFE, ECTFE, ETFE, THV, FEP films; The thickness of the flexible air surface layer is 25-50 μm; The transparent structure reinforcement layer is connected in sequence by a first adhesive layer, a PET layer and a second adhesive layer.

2. The integrated flexible transparent sheet according to claim 1, characterized in that: The adhesive film layer is a composite film of one or more of EVA, TPU, TPO, POE and PVB.

3. The integrated flexible transparent sheet according to claim 1, characterized in that: The thickness of the adhesive film layer is 20-500 μm.

4. The integrated flexible transparent sheet according to claim 1, characterized in that: The transparent structure reinforcement layer has a thickness of 100-1000 μm.

5. The integrated flexible transparent sheet according to claim 1, characterized in that: The thickness of the first bonding layer and the second bonding layer is 10-50 um.

6. The integrated flexible transparent sheet material according to claim 1, characterized in that: The thickness of the PET layer is 20-400 μm.

7. The integrated flexible transparent sheet material according to claim 1, characterized in that: The transparent structure reinforcement layer is a polycarbonate layer.

8. A photovoltaic cell, characterized in that: The integrated flexible transparent sheet material according to any one of claims 1 to 7 is used.

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