A flexible photovoltaic module with a CGFPP organic sheet as a backsheet material
Patent Information
- Application Number
- CN202521567515.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-25
- Publication Date
- 2026-09-22
- Estimated Expiration
- 2035-07-25
AI Technical Summary
[0005]本实用新型的目的在于提供一种以CGFPP有机片材作为背板材料的柔性光伏组件，以解决上述背景技术提出在一定湿度和温度的环境中，PET支撑板的水解反应会导致分子链断裂，容易使得材料吸水率在一定时间内持续上升，进而容易出现支撑板表面鼓包、层间剥离等结构性失效的情况，不便于光伏组件的使用，影响光伏组件的适应性的问题：
1、本实用，通过支撑层为玻璃纤维层，提高支撑板的支撑强度，提高支撑板的耐热性和抗老化性，减少层间剥离，通过防护层为聚丙烯层，减少水汽渗透，提高支撑板的抗老化性，通过支撑层与防护层内的亚磷酸酯抗氧剂，显著提升光伏组件本体的抗热氧老化能力，减少水汽浸入组件内部，减少板鼓包的情况，然后，通过粘结层为马来酸酐接枝聚丙烯，使得材料贴合更加紧密，提高支撑板的使用寿命和整体稳定性，通过耐候层为聚偏氟乙烯涂层，减少支撑层与防护层的老化，提高支撑板对复杂环境的抵抗能力，提高使用寿命。
Smart Images
Figure CN224791005U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of photovoltaic technology, specifically to a flexible photovoltaic module using CGFPP organic sheets as the backsheet material. Background Technology
[0002] Lightweight flexible photovoltaic modules are a new type of solar panel that combines flexible substrates (such as polymer materials like polyester, polyimide, and PTFE) with high-efficiency semiconductor cells (such as TOPCON, MWT crystalline silicon, and thin-film cells). Currently, with the development of crystalline silicon technology and advancements in packaging technology, new, high-efficiency lightweight flexible crystalline silicon modules are gradually gaining market share.
[0003] In the current backsheet material system of flexible photovoltaic modules, polyethylene terephthalate (PET) occupies a mainstream position due to its advantages such as low cost, excellent insulation and stable processing performance. The photovoltaic support plate is the core component of lightweight flexible modules, providing support for the lightweight flexible modules and solving the problem of insufficient rigidity of flexible photovoltaics. The photovoltaic support plate is the encapsulation material on the back of the photovoltaic module, located on the outermost layer of the module, and directly exposed to the outdoor environment.
[0004] Existing photovoltaic modules use backsheets made of polymer materials such as PET, which facilitates their use. However, under certain humidity and temperature conditions, the hydrolysis of PET backsheets can cause molecular chain breakage, leading to a continuous increase in the material's water absorption rate over a period of time. This can result in structural failures such as bulging on the backsheet surface and delamination, making it difficult to use photovoltaic modules and affecting their adaptability. Utility Model Content
[0005] The purpose of this invention is to provide a flexible photovoltaic module using CGFPP organic sheets as the backsheet material, in order to solve the problem mentioned in the background art that, under certain humidity and temperature conditions, the hydrolysis reaction of the PET support sheet leads to molecular chain breakage, which easily causes the material's water absorption rate to continuously increase within a certain period of time. This, in turn, easily leads to structural failures such as bulging on the support sheet surface and interlayer delamination, making it inconvenient to use the photovoltaic module and affecting its adaptability. The objective of this utility model can be achieved through the following technical solutions: A flexible photovoltaic module using CGFPP organic sheet as the backsheet material includes a photovoltaic module body, a transparent front panel disposed within the photovoltaic module body, a support plate disposed within the photovoltaic module body, and a protective mechanism disposed between the support plate and the photovoltaic module body to improve the protection effect of the support plate against humidity and temperature. The protective mechanism includes a support layer fixed within the support plate, the support layer being a glass fiber layer, and a protective layer fixed to one side of the support layer, the protective layer being a polypropylene layer. The glass fiber layer and the polypropylene are composited using a unidirectional prepreg tape process to form a continuous fiber-reinforced structure, wherein the glass fibers are distributed in a unidirectional arrangement within the polypropylene layer. Phosphite antioxidants are disposed within the protective layer and the support layer, and a protective component is disposed between the protective layer and the support plate.
[0006] As a further embodiment of this utility model: the protective component includes an adhesive layer fixed to one side of the protective layer, a weather-resistant layer fixed to one side of the adhesive layer, the adhesive layer being maleic anhydride-grafted polypropylene, the adhesive layer being evenly distributed within the protective layer and the support layer, and the weather-resistant layer being a polyvinylidene fluoride coating.
[0007] As a further embodiment of this utility model: two symmetrical adhesive films are provided inside the photovoltaic module, and both adhesive films are fixedly connected to the support plate and the transparent front plate. The adhesive films are polyolefin elastomer adhesive films.
[0008] As a further embodiment of this invention: a battery cell is fixed between the two adhesive films, and the battery cell is a monocrystalline silicon battery cell.
[0009] As a further embodiment of this utility model: a protective layer is fixed inside the transparent front panel, and the protective layer is an acrylic layer.
[0010] As a further embodiment of this utility model: a water-blocking layer is fixed on one side of the protective layer, and the water-blocking layer is a vinyl alcohol copolymer layer.
[0011] As a further embodiment of this utility model: a transparent base layer is fixed to one side of the water-blocking layer, and the transparent base layer is fixedly connected to the adhesive film on one side. The transparent base layer is a cyclic olefin polymer layer, and the transparent base layer is fixedly connected to the adhesive film.
[0012] As a further embodiment of this utility model: a sealing layer is fixed at each of the four corners of the photovoltaic module body, and the sealing layer is a silicone rubber layer.
[0013] The beneficial effects of this utility model are: 1. This invention utilizes a fiberglass support layer to enhance the support strength, heat resistance, and aging resistance of the photovoltaic module, reducing interlayer delamination. A polypropylene protective layer reduces moisture penetration and improves the aging resistance of the support module. Phosphite antioxidants within the support and protective layers significantly enhance the photovoltaic module's resistance to thermo-oxidative aging, reducing moisture infiltration and bulging. Furthermore, a maleic anhydride-grafted polypropylene adhesive layer ensures tighter material bonding, improving the support module's lifespan and overall stability. Finally, a polyvinylidene fluoride (PVDF) coating reduces aging of the support and protective layers, enhancing the support module's resistance to complex environments and extending its lifespan.
[0014] 2. This invention utilizes an acrylate protective layer to improve the light transmittance, weather resistance, and chemical corrosion resistance of the photovoltaic module, facilitating module stability. A vinyl alcohol copolymer water-blocking layer enhances resistance to gases and moisture, reducing moisture ingress and oxidation. A cyclic olefin polymer transparent base layer improves the light transmittance and mechanical support of the photovoltaic module, enhancing its resistance to damp heat aging. A silicone rubber sealing layer provides enhanced containment and protection for the photovoltaic module, increasing its airtightness and reducing moisture ingress. Attached Figure Description
[0015] The present invention will be further described below with reference to the accompanying drawings.
[0016] Figure 1 This is a schematic diagram of the structure of the photovoltaic module of this utility model; Figure 2 This is a schematic diagram of the internal structure of the photovoltaic module of this utility model; Figure 3 This is a utility model Figure 2 Enlarged structural diagram at point A in the middle.
[0017] In the diagram: 1. Photovoltaic module body; 2. Transparent front panel; 3. Support plate; 4. Solar cell; 5. Encapsulant film; 6. Support layer; 7. Protective layer; 8. Adhesive layer; 9. Weather-resistant layer; 10. Sealing layer; 11. Protective layer; 12. Water-blocking layer; 13. Transparent base layer. Detailed Implementation
[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.
[0019] Please see Figure 1 - Figure 3 As shown, this utility model is a flexible photovoltaic module using CGFPP organic sheet as the backsheet material. It includes a photovoltaic module body 1, a transparent front panel 2 disposed within the photovoltaic module body 1, a support plate 3 disposed within the photovoltaic module body 1, and a protective mechanism between the support plate 3 and the photovoltaic module body 1 to improve the protection effect of the support plate 3 against humidity and temperature. The protective mechanism includes a support layer 6 fixed within the support plate 3, the support layer 6 being a glass fiber layer. A protective layer 7, a polypropylene layer, is fixed to one side of the support layer 6. The glass fiber layer and polypropylene are composited using a unidirectional prepreg tape process to form a continuous fiber-reinforced structure, wherein the glass fibers are distributed in a unidirectional arrangement within the polypropylene layer. Phosphite antioxidants are disposed within the protective layer 7 and the support layer 6. A protective component is disposed between the protective layer 7 and the support plate 3. The protective component includes an adhesive layer 8 fixed to one side of the protective layer 7, and a weather-resistant layer 9 fixed to one side of the adhesive layer 8. The adhesive layer 8 is maleic anhydride-grafted polypropylene and is uniformly distributed within the protective layer 7 and the support layer 6. The weather-resistant layer 9 is a polyvinylidene fluoride coating. The photovoltaic module has two symmetrical encapsulant films 5, both of which are fixedly connected to the support plate 3 and the transparent front plate 2. The encapsulant films 5 are polyolefin elastomer films.
[0020] Specifically, the staff installs the photovoltaic module body 1 in the designated position. The transparent front panel 2 facilitates sunlight transmission and protects the photovoltaic module. The support plate 3 protects the photovoltaic module and facilitates its stable use. The protective mechanism improves the stability of the support plate 3, enhances its resistance to humidity and temperature, and reduces structural failures such as bulging and interlayer peeling. Specifically, the support layer 6, being a glass fiber layer, enhances the support strength of the support plate 3, improves its heat resistance and aging resistance, and reduces interlayer delamination. The protective layer 7, a polypropylene layer, through its tight bond with the glass fiber layer, reduces moisture penetration, ensures the interfacial stability between the glass fiber and polypropylene, and maintains the long-term mechanical properties of the material. The unidirectional distribution of glass fibers within the polypropylene layer enhances the effect of the protective layer 7, improving the aging resistance of the support plate 3. The phosphite antioxidants within the support layer 6 and the protective layer 7 significantly improve the photovoltaic module body 1's resistance to thermo-oxidative aging. In the module, this function directly protects the CGFPP... Structural integrity of support plate 3: Even under long-term high-temperature environment, the substrate of support plate 3 can still maintain good flexibility and adhesion, avoiding cracking of support plate 3 due to material embrittlement, thereby reducing the penetration of water vapor into the module and reducing the occurrence of plate bulging. Then, the adhesive layer 8 is maleic anhydride grafted polypropylene, which is evenly distributed between support layer 6 and protective layer 7, improving the fixing strength of support layer 6 to protective layer 7, making the material fit more tightly, reducing defects such as air pockets and voids, and improving the service life and overall stability of support plate 3. The weather-resistant layer 9 is a polyvinylidene fluoride coating, which reduces the aging of support layer 6 and protective layer 7, improves the resistance of support plate 3 to complex environment, and improves service life. The encapsulant film 5 is a polyolefin elastomer encapsulant film, which improves the resistance of photovoltaic module body 1 to damp heat aging, improves hydrolysis resistance, and reduces the decrease in light transmittance of encapsulant film 5 as it ages.
[0021] In this embodiment, refer to Figure 2 - Figure 3 As shown, a battery cell 4 is fixed between the two films 5. The battery cell 4 is a monocrystalline silicon battery cell 4.
[0022] Specifically, the battery is a single silicon crystal cell 4, which facilitates the conversion of sunlight into electrical energy and makes it easy to use the photovoltaic module body 1.
[0023] In this embodiment, refer to Figure 2 - Figure 3 As shown, a protective layer 11, which is an acrylic ester layer, is fixed inside the transparent front panel 2. A water-blocking layer 12, which is an ethylene alcohol copolymer layer, is fixed to one side of the protective layer 11. A transparent base layer 13, which is a cyclic olefin polymer layer, is fixed to one side of the water-blocking layer 12 and is fixedly connected to the adhesive film 5. A sealing layer 10, which is a silicone rubber layer, is fixed to each of the four corners of the photovoltaic module body 1.
[0024] Specifically, the protective layer 11 is an acrylate layer, which improves the light transmittance of the photovoltaic module body 1, enhances its weather resistance and chemical corrosion resistance, and facilitates module stability. The water-blocking layer 12 is a vinyl alcohol copolymer layer, which improves the barrier performance of the photovoltaic module, enhances its resistance to gases and moisture, reduces moisture ingress, and reduces oxidation. The transparent base layer 13 is a cyclic olefin polymer layer, which improves the light transmittance and mechanical support of the photovoltaic module, and enhances its resistance to damp heat aging. The sealing layer 10 is a silicone rubber layer, which enhances the restriction and protection of the photovoltaic module body 1, increases its sealing performance, and reduces moisture ingress.
[0025] The working principle of this utility model is as follows: the staff installs the photovoltaic module body 1 in the designated position. The transparent front panel 2 facilitates the transmission of sunlight and protects the photovoltaic module. The support plate 3 protects the photovoltaic module and facilitates its stable use. The battery is a single silicon crystal cell 4, which facilitates the conversion of sunlight into electrical energy and facilitates the use of the photovoltaic module body 1. Then, by using a glass fiber support layer 6, the supporting strength of the support plate 3 is improved, as well as its heat resistance and aging resistance, and interlayer delamination is reduced. The protective layer 7, a polypropylene layer, through its tight bond with the glass fiber layer, reduces moisture penetration, ensures the interfacial stability between the glass fiber and polypropylene, and maintains the long-term mechanical properties of the material. The unidirectional distribution of glass fibers within the polypropylene layer enhances the effect of the protective layer 7, improving the aging resistance of the support plate 3. The phosphite antioxidants within the support layer 6 and the protective layer 7 significantly improve the photovoltaic module body 1's resistance to thermo-oxidative aging. In the module, this function directly protects the CGFPP... Structural integrity of support plate 3: Even under long-term high temperature environment, the substrate of support plate 3 can still maintain good flexibility and adhesion, avoiding cracking of support plate 3 due to material embrittlement, thereby reducing the penetration of water vapor into the module. Then, the adhesive layer 8 is maleic anhydride grafted polypropylene, which is evenly distributed between support layer 6 and protective layer 7, improving the fixing strength of support layer 6 to protective layer 7, improving the service life and overall stability of support plate 3. The weather-resistant layer 9 is polyvinylidene fluoride coating, which reduces the aging of support layer 6 and protective layer 7, and improves the resistance of support plate 3 to complex environment. The encapsulant film 5 is polyolefin elastomer encapsulant film 5, which improves the resistance of photovoltaic module body 1 to damp heat aging. The protective layer 11 is an acrylate layer, which improves the light transmittance of the photovoltaic module body 1, as well as its weather resistance and chemical corrosion resistance. The water-blocking layer 12 is a vinyl alcohol copolymer layer, which improves the barrier performance of the photovoltaic module, enhances its resistance to gases and moisture, reduces the ingress of moisture, and reduces oxidation. The transparent base layer 13 is a cyclic olefin polymer layer, which improves the light transmittance and mechanical support of the photovoltaic module, and enhances its resistance to damp heat aging. The sealing layer 10 is a silicone rubber layer, which enhances the restriction and protection of the photovoltaic module body 1 and increases its sealing performance.
[0026] The above description provides a detailed account of one embodiment of the present invention. However, this description is merely a preferred embodiment and should not be construed as limiting the scope of the present invention. All equivalent variations and improvements made within the scope of the claims of the present invention should still fall within the patent coverage of the present invention.
Claims
1. A flexible photovoltaic module using CGFPP organic sheet as backsheet material, comprising a photovoltaic module body (1), characterized in that: A transparent front panel (2) is provided inside the photovoltaic module body (1), and a support plate (3) is provided inside the photovoltaic module body (1). A protective mechanism is provided between the support plate (3) and the photovoltaic module body (1) to improve the protection effect of the support plate (3) against humidity and temperature. The protective mechanism includes a support layer (6) fixed inside the support plate (3). The support layer (6) is a glass fiber layer. A protective layer (7) is fixed on one side of the support layer (6). The protective layer (7) is a polypropylene layer. The glass fiber layer and the polypropylene are composited by a unidirectional prepreg tape process to form a continuous fiber reinforced structure. The glass fibers are distributed in the polypropylene layer in a unidirectional arrangement. Phosphite antioxidants are provided in the protective layer (7) and the support layer (6). A protective component is provided between the protective layer (7) and the support plate (3).
2. A flexible photovoltaic module using CGFPP organic sheet as backsheet material according to claim 1, characterized in that, The protective component includes an adhesive layer (8) fixed to one side of the protective layer (7), and a weather-resistant layer (9) fixed to one side of the adhesive layer (8). The adhesive layer (8) is maleic anhydride-grafted polypropylene. The adhesive layer (8) is evenly distributed in the protective layer (7) and the support layer (6). The weather-resistant layer (9) is a polyvinylidene fluoride coating.
3. A flexible photovoltaic module using CGFPP organic sheet as backsheet material according to claim 1, characterized in that, The photovoltaic module is provided with two symmetrical adhesive films (5), both of which are fixedly connected to the support plate (3) and the transparent front plate (2). The adhesive films (5) are polyolefin elastomer adhesive films (5).
4. A flexible photovoltaic module using CGFPP organic sheet as backsheet material according to claim 3, characterized in that, A battery cell (4) is fixed between the two adhesive films (5), and the battery cell (4) is a single silicon crystal battery cell (4).
5. A flexible photovoltaic module using CGFPP organic sheet as backsheet material according to claim 1, characterized in that, The transparent front panel (2) has a protective layer (11) fixed inside, and the protective layer (11) is an acrylic layer.
6. A flexible photovoltaic module using CGFPP organic sheet as backsheet material according to claim 5, characterized in that, A water-blocking layer (12) is fixed on one side of the protective layer (11), and the water-blocking layer (12) is an ethylene alcohol copolymer layer.
7. A flexible photovoltaic module using CGFPP organic sheet as backsheet material according to claim 6, characterized in that, A transparent base layer (13) is fixed on one side of the water-blocking layer (12), and the transparent base layer (13) is fixedly connected to the adhesive film (5) on one side. The transparent base layer (13) is a cyclic olefin polymer layer, and the transparent base layer (13) is fixedly connected to the adhesive film (5).
8. A flexible photovoltaic module using CGFPP organic sheet as backsheet material according to claim 1, characterized in that, Each of the four corners of the photovoltaic module body (1) is fixed with a sealing layer (10), which is a silicone rubber layer.