Impact-resistant plate and photovoltaic module front plate

Abstract

The utility model discloses an impact-resistant plate and a photovoltaic assembly front plate, and relates to the field of photovoltaic technology. The impact-resistant plate comprises a framework layer, a through hole is formed in the framework layer, the impact-resistant plate further comprises buffer layers distributed on the two sides of the framework layer and in the through hole, and the buffer layers are integrally formed. According to the impact-resistant plate provided by the utility model, the framework layer is matched with the buffer layer, the structural rigidity is improved by utilizing the framework layer to resist hail impact, and meanwhile, the overall impact resistance of the impact-resistant plate can be further improved through the buffer effect of the buffer layer. In addition, according to the photovoltaic assembly front plate provided by the utility model, the impact-resistant plate in any scheme can be used as the photovoltaic assembly front plate to protect photovoltaic cells. The photovoltaic module front plate has excellent weather resistance and impact resistance, so that the photovoltaic module front plate can deal with hail weather and can adapt to severe use scenes.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic technology, and in particular to an impact-resistant sheet material and a front panel for photovoltaic modules. Background Technology

[0002] Photovoltaic products are widely used because they can convert solar energy into electrical energy. However, since photovoltaic modules are installed outdoors, the instability of outdoor environmental factors is the main reason affecting the lifespan of photovoltaic modules. This is especially true in areas with low temperatures and frequent hail, where hail can exert a huge impact on the photovoltaic modules, damaging their overall structure and thus affecting their overall lifespan.

[0003] CN202373615U discloses a rigid solar cell backsheet, which includes a base layer, an outer layer, and a fluorine-containing coating from the center outwards. The base layer is a PET honeycomb layer, which has the characteristics of high rigidity, high strength, high impact resistance, and good heat dissipation. However, it is still unable to withstand the dense impact of large hailstones. Therefore, providing a structure and sheet material with excellent impact resistance is a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0004] One of the objectives of this invention is to provide an impact-resistant sheet material. This impact-resistant sheet material utilizes the combination of a skeleton layer and a buffer layer to improve structural rigidity and impact resistance. Furthermore, through the buffering effect of the buffer layer, the overall impact resistance of the impact-resistant sheet material is further improved. Therefore, when the impact-resistant sheet material provided by this invention is applied to the front panel of a photovoltaic module, it can significantly improve the overall protection of the photovoltaic module compared to the impact-resistant sheet material in the prior art, thereby increasing the service life of the lightweight photovoltaic module.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] An impact-resistant sheet material includes a skeleton layer with through holes, and a buffer layer distributed on both sides of the skeleton layer and inside the through holes, wherein the buffer layer is integrally formed.

[0007] As an alternative to impact-resistant sheet material, the skeleton layer is one of PET film, PC film, PP film, PE film or continuous fiber woven fabric.

[0008] As an alternative to impact-resistant sheet material, when the skeleton layer is one of PET film, PC film, PP film and PE film, an adhesive layer is coated between the skeleton layer and the buffer layer;

[0009] Furthermore, the thickness of the skeleton layer is 50-500 μm.

[0010] As an optional solution for impact-resistant sheet metal, the open area ratio of the through holes on the skeleton layer is 50-80%, and the area of ​​each through hole ranges from 3-80mm. 2 .

[0011] As an alternative to impact-resistant sheet material, the fibers in the continuous fiber woven fabric are selected from one or a mixture of several of glass fibers, basalt fibers, carbon fibers, hemp fibers, and polymer fibers.

[0012] As an alternative to impact-resistant sheet material, the continuous fiber woven fabric has a porosity of 30-90%.

[0013] As an alternative to impact-resistant sheet material, the buffer layer is one or more of EVA, POE, EPE, and TPO film;

[0014] Furthermore, the thickness of the buffer layers distributed on both sides of the skeleton layer is 300-600μm.

[0015] The second objective of this invention is to provide a front panel for photovoltaic modules, which can be used to protect photovoltaic cells. Due to its excellent weather resistance and impact resistance, the front panel can withstand hailstorms.

[0016] To achieve this objective, the present invention also provides the following technical solution:

[0017] A photovoltaic module front panel, wherein the impact-resistant material comprises, from the outside to the inside, a weather-resistant layer and an impact-resistant layer, wherein the impact-resistant layer is the impact-resistant material described in any of the above embodiments.

[0018] As an optional solution for the front panel of a photovoltaic module, the weather-resistant layer is one of the following: glass fiber structure, weather-resistant coating-PET-weather-resistant coating structure, weather-resistant film-PET-weather-resistant coating structure, and weather-resistant film structure;

[0019] The thickness of the weather-resistant layer is 10-50 μm.

[0020] As an optional solution for the front panel of a photovoltaic module, the weather-resistant film is one of PVDF film, PVF film, PO film, ETFE film, and ECTFE film;

[0021] Furthermore, the glass fiber structure is a glass fiber woven fabric impregnated with epoxy resin or polyolefin resin.

[0022] The beneficial effects of this utility model are:

[0023] The impact-resistant sheet material provided by this utility model utilizes the combination of a skeleton layer and a buffer layer. While the skeleton layer improves the structural rigidity to resist hail impact, the buffer layer further enhances the overall impact resistance of the sheet material through its buffering effect.

[0024] Furthermore, this utility model also provides a front panel for a photovoltaic module. The impact-resistant sheet material in any of the above-mentioned solutions can serve as the front panel to protect the photovoltaic cells. The front panel of the photovoltaic module possesses excellent weather resistance and impact resistance, sufficient to withstand hailstorms and adapt to harsh usage scenarios. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the impact-resistant plate provided in a specific embodiment of this utility model;

[0026] Figure 2 This is a schematic diagram of the skeleton layer structure provided in a specific embodiment of this utility model;

[0027] Figure 3 This is a schematic diagram of the photovoltaic front panel structure provided in a specific embodiment of this utility model;

[0028] In the diagram: 1-Buffer layer; 2-Skeleton layer; 3-Through hole; 4-Weather-resistant layer. Detailed Implementation

[0029] To make the technical problem solved by this utility model, the technical solution adopted, and the technical effect achieved clearer, the technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0030] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0031] like Figure 1 and Figure 2 As shown, this embodiment provides an impact-resistant sheet material, which includes a skeleton layer 2, the skeleton layer 2 having through holes 3, and a buffer layer 1 distributed on both sides of the skeleton layer 2 and inside the through holes. The impact-resistant buffer layer 1 is integrally formed.

[0032] In the prior art, those skilled in the art often improve the impact resistance of the board by increasing the rigidity of a certain structure in the board. Some other artists improve the impact resistance by setting springs or other elastic bodies in the substrate. Although both of these methods can improve the impact resistance of the board to a certain extent, they still cannot effectively protect the photovoltaic modules in extreme hail weather.

[0033] To further improve the impact resistance of the sheet material, the impact-resistant sheet material provided in this utility model includes a skeleton layer. The skeleton layer material has good support, which can greatly improve the rigidity of the material. Moreover, by setting through holes in the skeleton material, buffer layer material is set on both sides of the skeleton and inside the through holes, which fully wraps the skeleton material and improves the toughness of the material. Furthermore, the buffer layer material on both sides of the skeleton layer and inside the through holes is integrally molded, which not only improves the impact resistance of the material, but also improves the overall integrity of the sheet material and enhances its impact resistance.

[0034] In order to ensure that the skeleton layer has good rigidity, in an optional embodiment of this utility model, the skeleton layer is one of PET film, PC film, PP film, PE film or continuous fiber woven fabric. The selection of skeleton layer material and thickness affects the rigidity of the skeleton layer, thereby improving the impact resistance.

[0035] Furthermore, the thickness of the skeleton layer in this application is 50-500 μm.

[0036] In order to improve the stable connection between the skeleton layer and the buffer layer, if the skeleton layer and the buffer layer cannot be tightly fixed, the impact-resistant sheet material is prone to delamination when subjected to a large impact force. Therefore, in an optional embodiment of this utility model, when the skeleton layer is one of PET film, PC film, PP film and PE film, an adhesive layer is coated between the skeleton layer and the buffer layer.

[0037] Furthermore, the adhesive layer is an glue layer.

[0038] To ensure the buffer layer fully covers the skeleton layer and provides sufficient cushioning, the proportion of the open area in the skeleton layer and the size of each through-hole need to be limited. If the open area or a single through-hole is too large, the rigidity of the skeleton layer is easily reduced, decreasing the impact resistance and overall support of the board. If the open area or the size of each through-hole is too small, effective one-piece molding cannot be achieved within the through-holes. Therefore, in one optional embodiment of this invention, the proportion of the open area of ​​the through-holes in the skeleton layer is 50-80%, and the area of ​​each through-hole ranges from 3-80 mm. 2 .

[0039] To ensure the rigidity of the skeleton layer, in an optional embodiment of this utility model, the fibers in the continuous fiber woven fabric are selected from one or a mixture of several of glass fibers, basalt fibers, carbon fibers, hemp fibers and polymer fibers.

[0040] In order to balance the rigidity of the skeleton layer and the buffering effect of the buffer layer, in an optional embodiment of this utility model, the porosity of the continuous fiber woven fabric is 30-90%.

[0041] In order to provide a good cushioning effect and to ensure that the buffer layer 1 can be integrally formed in the through hole 3, in an optional embodiment of the present invention, the buffer layer 1 is one or more of EVA, POE, EPE, and TPO film;

[0042] Furthermore, the thickness of the buffer layer 1 distributed on both sides of the skeleton layer 2 is 300-600μm.

[0043] like Figure 3 As shown, this embodiment provides a front panel for a photovoltaic module. The front panel for the photovoltaic module includes a weather-resistant layer 4 and an impact-resistant layer from the outside to the inside. The impact-resistant layer is an impact-resistant material as described in any of the above solutions.

[0044] In order to ensure the overall performance of the front panel of the photovoltaic module and provide sufficient weather resistance for the photovoltaic module, in an optional embodiment of this utility model, the weather-resistant layer 4 is one of the following: glass fiber structure, weather-resistant coating-PET-weather-resistant coating structure, weather-resistant film-PET-weather-resistant coating structure, and weather-resistant film structure;

[0045] Furthermore, the thickness of the weather-resistant layer 4 is said to be 10-50 μm.

[0046] In one optional embodiment of this utility model, the weather-resistant film is one of PVDF film, PVF film, PO film, ETFE film, and ECTFE film;

[0047] Furthermore, the glass fiber structure is a glass fiber woven fabric impregnated with epoxy resin or polyolefin resin.

[0048] The above description is only a preferred embodiment of this utility model. For those skilled in the art, there will be changes in the specific implementation method and application scope based on the idea of ​​this utility model. The content of this specification should not be construed as a limitation of this utility model.

Claims

1. An impact-resistant panel, characterized by, The impact-resistant plate comprises a skeleton layer provided with through holes, and further comprises buffer layers distributed on both sides of the skeleton layer and inside the through holes, and the buffer layers are integrally formed.

2. The impact-resistant panel of claim 1, wherein, The skeleton layer is one of PET film, PC film, PP film, PE film or continuous fiber woven cloth. The thickness of the skeleton layer is 50-500μm.

3. The impact-resistant panel of claim 2, wherein, When the skeleton layer is one of PET film, PC film, PP film and PE film, an adhesive layer is coated between the skeleton layer and the buffer layer.

4. The impact-resistant panel of claim 3, wherein, The open area ratio of the through holes on the skeleton layer is 50-80%, and the area of each through hole ranges from 3 to 80mm².

5. The impact-resistant panel of claim 2, wherein, The fiber in the continuous fiber woven cloth is one or a mixture of several of glass fiber, basalt fiber, carbon fiber, hemp fiber and polymer fiber.

6. The impact-resistant panel of claim 5, wherein, The porosity of the continuous fiber cloth is 30-90%.

7. The impact-resistant panel of any one of claims 1-6, wherein, The buffer layer is one or more of EVA, POE, EPE and TPO film. The thickness of the buffer layer distributed on both sides of the skeleton layer is 300-600μm.

8. A photovoltaic module front sheet, characterized by The front plate of the photovoltaic module comprises, from outside to inside, a weather-resistant layer and an impact-resistant layer, and the impact-resistant layer is the impact-resistant plate according to any one of claims 1-7.

9. The photovoltaic module frontsheet of claim 8, wherein, The weather-resistant layer is one of glass fiber structure, weather-resistant coating-PET-weather-resistant coating structure, weather-resistant film-PET-weather-resistant coating structure and weather-resistant film structure. The thickness of the weather-resistant layer is 10-50um.

10. The photovoltaic module frontsheet of claim 9, wherein, The weather-resistant film is one of PVDF film, PVF film, PO film, ETFE film and ECTFE film. The glass fiber structure is glass fiber woven cloth impregnated with epoxy resin or polyolefin resin.

Images