Integrated light transparent sheet and photovoltaic cell

Abstract

The utility model relates to the field of photovoltaic cell sheets, in particular to an integrated light transparent sheet. The sheet is composed of an air surface layer, an adhesive film layer and a transparent structure enhancement layer which are arranged in sequence. The air surface layer comprises an external protection layer, a first PET layer and a first bonding layer which are arranged in sequence; the thickness of the air surface layer is 25-350 [mu] m; wherein the thickness ratio of the external protection layer to the first PET layer to the first bonding layer is 1: (1-60): 1; and the thickness of the structure enhancement layer is 100-1000 [mu] m. According to the integrated light transparent sheet and the photovoltaic cell applying the sheet, the sheet is integrally formed, so that the production time of the sheet is greatly shortened, the sheet has excellent mechanical property and high transparency, and the transportation cost of the sheet is greatly reduced due to the characteristic of light weight, so that the production cost of the sheet is greatly reduced, and the production efficiency of the photovoltaic cell is improved. The weight of the photovoltaic cell is reduced, and the load of a building is reduced.

Description

Technical Field

[0001] The utility model relates to the field of photovoltaic cell sheets, and specifically relates to an integrated lightweight transparent sheet. Background Technique

[0002] With the further expansion of people's demand for green energy, the development of the photovoltaic cell industry has received extensive attention. In the field of photovoltaic cells, in order to fully protect the cell sheets, each photovoltaic cell manufacturer will set a front plate and a back plate on both sides of the cell sheet to deal with the impact of the cell sheet by hail, rain or other sundries, and to prevent the accumulation of dust on the surface of the photovoltaic cell, so as to avoid the negative impact of the long-term accumulation of dust on the power generation efficiency of the photovoltaic cell. Therefore, in order to ensure the service life of the photovoltaic cell, the front plate or the back plate of the photovoltaic cell is required to have excellent weather resistance, mechanical properties, dust-proof properties, and in order to ensure the power generation power of the photovoltaic cell, the transparency requirement of the sheet is relatively high.

[0003] At present, with the development of the photovoltaic industry, the demand for photovoltaic cells has increased significantly, and the production of sheets for photovoltaic cells faces great challenges, because general sheets are multi-layer structures, and the multi-layer structures need to be laminated layer by layer and roll-pressed layer by layer, which seriously affects the production efficiency of the sheets. Content of the Utility Model

[0004] The purpose of the utility model is to provide an integrated lightweight transparent sheet to solve the above technical problems at the same time and promote the further development of the photovoltaic industry. The sheet is composed of an air surface layer, a glue film layer, and a transparent structure strengthening layer arranged in sequence from outside to inside; the air surface layer is composed of an external protective layer, a first PET layer, and a first bonding layer arranged in sequence;

[0005] The thickness of the air surface layer is 25 - 350 μm; among them, the thickness ratio of the external protective layer, the first PET layer, and the first bonding layer is 1:(1 - 60):1;

[0006] The thickness of the transparent structure strengthening layer is 100 - 1000 μm.

[0007] As an optional scheme of the integrated lightweight transparent sheet, the external protective layer is a weather-resistant coating layer based on one or more of polyvinylidene fluoride resin, feve resin, pvf resin, fluorinated acrylic resin, silicone resin and its copolymer modified products, acrylic resin and its copolymer modified products, or a weather-resistant thin film layer formed by compounding and bonding / copolymerizing one or more of PVDF film, PVF film, PET film, ETFE film, and ECTFE film.

[0008] As an alternative to the integrated lightweight transparent sheet, when the external protective layer is a weather-resistant film layer, a glue layer is further provided between the external protective layer and the first PET layer, and the thickness of the glue layer is 5-20 μm.

[0009] As an alternative to the integrated lightweight transparent sheet, the adhesive film layer is a composite film of one or more of EVA, TPU, POE, and TPO;

[0010] Furthermore, the thickness of the adhesive film layer is 20-500 μm.

[0011] As an alternative to the integrated lightweight transparent sheet, the transparent structure reinforcing layer is sequentially connected by a second bonding layer, a second PET layer, and a third bonding layer.

[0012] As an alternative to the integrated lightweight transparent sheet, the first bonding layer, the second bonding layer, and the third bonding layer are all mixed coatings containing functional resin and polyurethane glue; the functional resin is composed of one or more of polyvinylidene fluoride resin, feve resin, pvf resin, fluorinated acrylic resin, silicone resin and its copolymer modified products, acrylic resin and its copolymer modified products;

[0013] The thickness of the second bonding layer and the third bonding layer is 10-50 μm.

[0014] As an alternative to the integrated lightweight transparent sheet, the thickness of the second PET layer is 20-400 μm.

[0015] As an alternative to the integrated lightweight transparent sheet, the transparent structure reinforcing layer is a glass fiber layer infiltrated with a polymer material, and the refractive index of the polymer material is 1.5-1.7.

[0016] As an alternative to the integrated lightweight transparent sheet, the transparent structure reinforcing layer is a polycarbonate layer.

[0017] Another object of the present invention is to provide a photovoltaic cell using the integrated lightweight transparent sheet described in any of the above solutions.

[0018] Advantages of the present invention:

[0019] The present invention provides an integrated lightweight transparent sheet. The sheet in this application is integrally formed, which greatly reduces the production time of the sheet, and has excellent mechanical properties and high transparency. Moreover, due to its light weight, the transportation cost of the sheet is greatly reduced. The photovoltaic cell using the sheet of the present invention has the characteristics of light weight, reduces the load on the building, and has excellent transparency and dust-proof performance, improving the power generation efficiency and service life of the photovoltaic cell. Description of the drawings

[0020] Figure 1 is the overall structure diagram of the integrated lightweight transparent sheet provided by the specific embodiment of the present utility model;

[0021] Figure 2 is the structure diagram of the air layer of the integrated lightweight transparent sheet provided by the specific embodiment of the present utility model;

[0022] Figure 3 is another structure diagram of the air layer of the integrated lightweight transparent sheet provided by the specific embodiment of the present utility model;

[0023] Figure 4 is the structure diagram of the transparent structure reinforcement layer of the integrated lightweight transparent sheet provided by the specific embodiment of the present utility model;

[0024] 1. Air layer;

[0025] 11. External protective layer;

[0026] 12. First PET layer;

[0027] 13. First bonding layer;

[0028] 14. Glue layer;

[0029] 2. Adhesive film layer;

[0030] 3. Transparent structure reinforcement layer;

[0031] 31. Second bonding layer;

[0032] 32. Second PET layer;

[0033] 33. Third bonding layer. Specific embodiment

[0034] In order to enable those skilled in the art to better understand the solution of the present utility model, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0035] As shown in the appended Figure 1 and the appended Figure 2As shown in the figure: This embodiment provides an integrated lightweight transparent sheet, which is composed of an air surface layer 1, an adhesive film layer 2, and a transparent structure reinforcing layer 3 arranged in sequence from the outside to the inside; the sheet structure provided by this application can not only achieve integrated production, greatly improving production efficiency, but also has the characteristics of light weight compared with glass sheets, increasing the load pressure of the product's usage scenarios and application sites. The air surface layer 1 is composed of an external protective layer 11, a first PET layer 12, and a first adhesive layer 13 arranged in sequence; the thickness of the air surface layer 1 is 25-350 μm; among them, the thickness ratio of the external protective layer 11, the first PET layer 12, and the first adhesive layer 13 is 1:(1-60):1; the thickness of the transparent structure reinforcing layer 3 is 100-1000 μm.

[0036] In order to improve the weather resistance and the dust-proof ability of the air surface layer, as an optional solution for an integrated lightweight transparent sheet, the external protective layer 11 is a weather-resistant coating layer based on one or more of polyvinylidene fluoride resin, silicone resin and its copolymer modified products, feve resin, pvf resin, fluorinated acrylic resin, acrylic resin and its copolymer modified products, or a weather-resistant thin film layer formed by composite bonding / coextrusion of one or more of PVDF film, PVF film, PET film, ETFE film, and ECTFE film.

[0037] In order to improve the stability between the air surface layer and the first PET layer and ensure the mechanical properties of the air surface layer, as an optional solution for an integrated lightweight transparent sheet, when the external protective layer 11 is a weather-resistant thin film layer, a glue layer is further provided between the external protective layer 11 and the first PET layer 12, and the thickness of the glue layer is 5-20 μm.

[0038] In order to improve the mechanical structure performance of the sheet and achieve stable connection between the air surface layer and the transparent structure reinforcing 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 thickness of the adhesive film layer 2 is 20-500 μm.

[0039] In order to improve the impact resistance and shock resistance of the sheet, as an optional solution for an integrated lightweight transparent sheet, the transparent structure reinforcing layer 3 is sequentially connected by a second adhesive layer 31, a second PET layer 32, and a third adhesive layer 33.

[0040] To prevent cracking between the layers of the sheet and improve the integrity of the sheet, ensuring the mechanical properties of the sheet to the greatest extent, as an alternative solution for an integrated lightweight transparent sheet, the first adhesive layer 13, the second adhesive layer 31, and the third adhesive layer 33 are all mixed coatings containing functional resin and glue; the functional resin is composed of one or more of polyvinylidene fluoride resin, feve resin, pvf resin, fluorinated acrylic resin, silicone resin and its copolymer modified products, acrylic resin and its copolymer modified products; the thickness of the second adhesive layer 31 and the third adhesive layer 33 is 10 - 50um.

[0041] To exert the function of the transparent structure reinforcing layer and realize the supporting role of the transparent structure reinforcing layer, as an alternative solution for an integrated lightweight transparent sheet, the thickness of the second PET layer 32 is 20 - 400μm.

[0042] To provide a sheet with high transparency and strong mechanical properties, as an alternative solution for an integrated lightweight transparent sheet, the transparent structure reinforcing layer 3 is a glass fiber layer infiltrated with a polymer material, and the refractive index of the polymer material is 1.5 - 1.7.

[0043] To ensure the transparency and strong mechanical properties of the sheet, as an alternative solution for an integrated lightweight transparent sheet, the transparent structure reinforcing layer 3 is a polycarbonate layer.

[0044] Example 1

[0045] An integrated transparent sheet is composed of an air surface layer 1, an EVA film layer 2, and a transparent structure reinforcing layer 3 arranged in sequence from outside to inside; the thickness of the air surface layer 1 is 150μm; the air surface layer 1 includes an external protective layer 11, a first PET layer 12, and a first adhesive layer 13 arranged in sequence; among them, the thickness ratio of the external protective layer 11, the first PET layer 12, and the first adhesive layer 13 is 1:28:1; the external protective layer 11 is a PVDF film layer.

[0046] A glue layer 14 is also provided between the external protective layer 11 and the first PET layer 12, and the thickness of the glue layer 14 is 10μm.

[0047] The EVA film layer 2 is an EVA film; the thickness of the EVA film layer is 100μm.

[0048] The transparent structure reinforcing layer 3 is connected in sequence by a second adhesive layer 31, a second PET layer 32, and a third adhesive layer 33; the thickness of the transparent structure reinforcing layer 3 is 500μm.

[0049] The first adhesive layer 13, the second adhesive layer 31, and the third adhesive layer 33 are all mixed coatings containing functional resin and glue; the functional resin is a mixture of polyvinylidene fluoride resin and silicone resin; the thickness of the second adhesive layer 31 and the third adhesive layer 33 is 30 μm.

[0050] The thickness of the second PET layer 32 is 440 μm.

[0051] Example 2

[0052] An integrated transparent sheet is composed of an air surface layer 1, an adhesive film layer 2, and a transparent structure reinforcing layer 3 arranged in sequence from outside to inside; the thickness of the air surface layer 1 is 350 μm; the air surface layer 1 includes an external protective layer 11, a first PET layer 12, and a first adhesive layer 13 arranged in sequence; among them, the thickness ratio of the external protective layer 11, the first PET layer 12, and the first adhesive layer 13 is 1:33:1; the external protective layer 11 is a weather-resistant coating layer based on fluorinated acrylic resin.

[0053] The adhesive film layer 2 is an EVA and POE composite film; the thickness of the adhesive film layer 2 is 300 μm.

[0054] The transparent structure reinforcing layer 3 is a polycarbonate layer; the thickness is 800 μm.

[0055] Example 3

[0056] An integrated transparent sheet is composed of an air surface layer 1, an adhesive film layer 2, and a transparent structure reinforcing layer 3 arranged in sequence from outside to inside; the thickness of the air surface layer 1 is 200 μm; the air surface layer 1 includes an external protective layer 11, a first PET layer 12, and a first adhesive layer 13 arranged in sequence; among them, the thickness ratio of the external protective layer 11, the first PET layer 12, and the first adhesive layer 13 is 1:18:1; the external protective layer 11 is a weather-resistant coating layer based on fluorinated acrylic resin.

[0057] The adhesive film layer 2 is a POE adhesive film; the thickness of the adhesive film layer 2 is 450 μm.

[0058] The transparent structure reinforcing layer 3 is a glass fiber layer infiltrated with a resin having a refractive index of 1.61, and the thickness is 350 μm.

[0059] Although the preferred embodiments of the embodiments of the present invention have been described, those skilled in the art can make additional changes and modifications to these embodiments once they know the basic creative concept. Therefore, the appended claims are intended to be construed as including the preferred embodiments and all changes and modifications falling within the scope of the embodiments of the present invention.

[0060] The above has introduced the technical solution provided by the present utility model in detail. Specific examples are used herein to elaborate on the principle and implementation manner of the present utility model. The description of the above embodiments is only used to help understand the method and its core idea of the present utility model; at the same time, for those of ordinary skill in the art, according to the idea of the present utility model, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present utility model.

Claims

1. An integrated lightweight transparent sheet, characterized in that, The sheet is composed of an air surface layer, an adhesive film layer, and a transparent structure reinforcing layer arranged in sequence from outside to inside; the air surface layer is composed of an external protective layer, a first PET layer, and a first adhesive layer arranged in sequence; the thickness of the air surface layer is 25 - 350 μm; among them, the thickness ratio of the external protective layer, the first PET layer, and the first adhesive layer is 1:(1 - 60):1; the thickness of the transparent structure reinforcing layer is 100 - 1000 μm.

2. The integrated lightweight transparent sheet according to claim 1, wherein The external protective layer is a weather-resistant thin film layer formed by composite bonding / coextrusion of one or more of PVDF film, PVF film, PET film, ETFE film, and ECTFE film.

3. The integrated lightweight transparent sheet according to claim 2, characterized in that, When the external protective layer is a weather-resistant thin film layer, an adhesive layer is further provided between the external protective layer and the first PET layer, and the thickness of the adhesive layer is 5 - 20 μm.

4. The integrated lightweight transparent sheet according to claim 1, wherein, The thickness of the adhesive film layer is 20 - 500 μm.

5. The integrated lightweight transparent sheet according to claim 1, wherein, The transparent structure reinforcing layer is sequentially connected by a second adhesive layer, a second PET layer, and a third adhesive layer.

6. The integrated lightweight transparent sheet according to claim 5, characterized in that The thicknesses of the second adhesive layer and the third adhesive layer are 10 - 50 μm.

7. The integrated lightweight transparent sheet according to claim 5, characterized in that The thickness of the second PET layer is 20 - 400 μm.

8. The integrated lightweight transparent sheet according to claim 1, wherein, The transparent structure reinforcing layer is a polycarbonate layer.

9. A photovoltaic cell, characterized in that, Apply the integrated lightweight transparent sheet according to any one of claims 1 - 8 above.

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