Environment-friendly photovoltaic module
By using polyvinyl fluoride to prepare the intermediate layer of the front plate and the fluorine-free back plate as a glass fiber substrate containing polypropylene, combined with fluorine-free coating and weather-resistant materials, the environmental protection problems and insufficient bearing capacity of lightweight photovoltaic modules are solved, and the stability and strength of environmentally friendly photovoltaic modules are improved.
Patent Information
- Application Number
- CN202421801514.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-26
- Publication Date
- 2025-09-02
- Estimated Expiration
- 2034-07-26
AI Technical Summary
The existing lightweight photovoltaic modules cannot meet environmental protection requirements and have poor load-bearing capacity, especially the fluorine-free backplane has a large shrinkage rate and is prone to warping.
The intermediate layer of the front plate and the fluorine-free back plate is made of polypropylene-containing glass fiber substrate, combining fluorine-free coating and weather-resistant materials to improve load-bearing capacity.
Meet environmental protection requirements, enhance the bearing capacity of photovoltaic modules, and avoid warping problems.
Smart Images
Figure CN223297956U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of solar power generation technology, and in particular to an environmentally friendly photovoltaic module. Background Art
[0002] With the development of solar power generation technology, more and more attention has been paid to the environmental protection issues of photovoltaic modules. Per- and polyfluoroalkyl substances (PFAS) are ubiquitous and irreversibly toxic and harmful to the environment and humans.
[0003] Currently, the front panels of lightweight photovoltaic modules are typically made from ethylene-tetrafluoroethylene (ETFE), polyvinylidene difluoride (PVDF), and thermoplastic / thermoset materials, which fail to meet environmental protection requirements. Furthermore, there are two options for backsheets of lightweight photovoltaic modules: fluorine-containing backsheets, including composite backsheets made with PVDF / ETFE, and coated backsheets coated with fluorine-containing resins (PVDF, chlorotrifluoroethylene resin, tetrafluoroethylene resin), which also fail to meet environmental protection requirements; and fluorine-free backsheets. Existing fluorine-free backsheets use polyethylene terephthalate (PET) as an intermediate layer. However, due to the thinness and softness of the PET intermediate layer, using PET as the intermediate layer material cannot meet the load requirements of lightweight modules. Summary of the Invention
[0004] This application proposes an environmentally friendly photovoltaic module to solve the problem that lightweight photovoltaic modules cannot meet environmental protection requirements and have poor load-bearing capacity.
[0005] In order to achieve the above objectives, this application adopts the following technical solutions:
[0006] In the first aspect, an environmentally friendly photovoltaic module is provided, including a front panel, a front adhesive film, a battery cell, a back adhesive film and a fluorine-free back panel; the front panel is made of polyvinyl fluoride and thermoplastic or thermosetting materials; the middle layer of the fluorine-free back panel is a glass fiber substrate containing polypropylene.
[0007] Furthermore, the fluorine-free backsheet is a coated fluorine-free backsheet or a composite fluorine-free backsheet.
[0008] Furthermore, in the case where the fluorine-free backsheet is a coated fluorine-free backsheet, the fluorine-free backsheet also includes a first EVA surface and a first air surface; the first EVA surface is adhered to the upper side of the intermediate layer and to the back adhesive film, and the first air surface is adhered to the lower side of the intermediate layer; the first EVA surface and the first air surface are fluorine-free coatings.
[0009] Furthermore, in the case where the fluorine-free backsheet is a composite fluorine-free backsheet, the fluorine-free backsheet also includes a second EVA surface and a second air surface; the second EVA surface is adhered to the upper side of the intermediate layer and to the back adhesive film, and the second air surface is adhered to the lower side of the intermediate layer; the second EVA surface is a fluorine-free coating or a fluorine-free weather-resistant material, and the second air surface is a fluorine-free weather-resistant material.
[0010] Furthermore, when the fluorine-free backsheet is a composite fluorine-free backsheet, the fluorine-free backsheet also includes a third air surface; the upper side of the middle layer is bonded to the back adhesive film, and the lower side of the middle layer is bonded to the third air surface; the third air surface is a fluorine-free weather-resistant material.
[0011] Furthermore, the fluorine-free weather-resistant material is co-extruded polyolefin.
[0012] Furthermore, the thickness of the second air surface is 200 μm-400 μm. When the second EVA surface is made of a fluorine-free weather-resistant material, the thickness of the second EVA surface is 200 μm-400 μm.
[0013] Furthermore, the thickness of the third air surface is 200 μm-400 μm.
[0014] Furthermore, the thickness of the intermediate layer is 500 μm-700 μm.
[0015] Furthermore, the glass fibers in the glass fiber matrix containing polypropylene are unidirectional continuous glass fibers.
[0016] In a second aspect, the present application also provides a photovoltaic system, comprising the above-mentioned environmentally friendly photovoltaic module.
[0017] The environmentally friendly photovoltaic module proposed in this application includes a front panel, a front adhesive film, a cell, a back adhesive film, and a fluorine-free back panel. The front panel is made of polyvinyl fluoride (PVF) and a thermoplastic or thermosetting material, and the middle layer of the fluorine-free back panel is a glass fiber substrate containing polypropylene. Based on this, since PVF does not belong to perfluoroalkyl and polyperfluoroalkyl substances, the front panel and the fluorine-free back panel can meet environmental protection requirements. In addition, the fluorine-free back panel uses a glass fiber substrate containing polypropylene as the material for the middle layer, which improves the load-bearing capacity of the photovoltaic module and overcomes the problems of large shrinkage and easy warping of the fluorine-free back panel used in related technologies. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 A schematic structural diagram of an environmentally friendly photovoltaic module provided in an embodiment of the present application;
[0019] Figure 2 A schematic diagram of the structure of a fluorine-free backsheet provided in an embodiment of the present application Figure 1 ;
[0020] Figure 3 A schematic diagram of the structure of a fluorine-free backsheet provided in an embodiment of the present application Figure 2 ;
[0021] Figure 4 A schematic diagram of the structure of a fluorine-free backsheet provided in an embodiment of the present application Figure 3 .
[0022] Reference numerals:
[0023] Front panel 110 , front adhesive film 120 , battery cell 130 , back adhesive film 140 , fluorine-free back panel 150 , first EVA surface 151 , middle layer 152 , first air surface 153 , second EVA surface 154 , second air surface 155 , and third air surface 156 . DETAILED DESCRIPTION
[0024] In order to make the purpose, technical solutions and advantages of the present application more clear, the present application is further described in detail below with reference to the accompanying drawings and embodiments. Examples of embodiments are shown in the accompanying drawings, in which the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and are not to be construed as limiting the present application. In addition, it should be understood that the specific embodiments described herein are merely used to explain the present application and are not intended to limit the present application.
[0025] In the description of this application, it should be understood that the terms "length", "width", "up", "down", "left", "right", "horizontal", "top", "bottom", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on this application.
[0026] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.
[0027] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections, electrical connections, or mutual communication; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to internal communication between two components or the interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.
[0028] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.
[0029] The disclosure below provides many different embodiments or examples for realizing different structures of the present application. In order to simplify the disclosure of the present application, the components and settings of specific examples are described below. Of course, they are merely examples and are not intended to limit the present application. In addition, the present application may repeat reference numbers and / or reference letters in different examples, and such repetition is for the purpose of simplicity and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present application provides examples of various specific processes and materials, but those of ordinary skill in the art will appreciate the application of other processes and / or the use of other materials.
[0030] In related technologies, the front panels of lightweight photovoltaic modules are generally made from ETFE, PVDF, and thermoplastic / thermosetting materials, which cannot meet environmental protection requirements. In addition, there are two options for the back panels of lightweight photovoltaic modules: one is a fluorine-containing back panel, including composite back panels made with PVDF / ETFE, and coated back panels coated with fluorine-containing resin coatings, which also cannot meet environmental protection requirements; the other is a fluorine-free back panel. Existing fluorine-free back panels use PET as the middle layer, but because the PET middle layer is thin and soft, it cannot meet the load requirements of lightweight modules.
[0031] To address the above-mentioned issues, the environmentally friendly photovoltaic module proposed in this application includes a front panel, a front adhesive film, a cell, a back adhesive film, and a fluorine-free back panel. The front panel is made of polyvinyl fluoride (PVF) and a thermoplastic or thermosetting material, and the middle layer of the fluorine-free back panel is a glass fiber substrate containing polypropylene. Based on this, since PVF does not belong to perfluoroalkyl and polyperfluoroalkyl substances, the front panel and the fluorine-free back panel can meet environmental protection requirements. In addition, the fluorine-free back panel uses a glass fiber substrate containing polypropylene as the material for the middle layer, which improves the load-bearing capacity of the photovoltaic module and overcomes the problems of large shrinkage and easy warping of the fluorine-free back panel used in related technologies.
[0032] In some embodiments, Figure 1 The schematic diagram of an environmentally friendly photovoltaic module is shown. The module includes a front panel 110, a front adhesive film 120, cells 130, a back adhesive film 140, and a fluorine-free back panel 150. The front adhesive film 120 is attached to the top of the cells 130, while the back adhesive film 140 is attached to the bottom of the cells 130. The top of the front adhesive film 120 is attached to the front panel 110, while the bottom of the back adhesive film 140 is attached to the fluorine-free back panel 150.
[0033] In practice, the cell 130 is used to convert light energy into electrical energy through the photoelectric effect under certain illumination conditions. The cell 130 has a front side and a back side, wherein the front side of the cell 130 refers to the light-receiving side and the back side of the cell 130 refers to the backlight side. Figure 1 In the environmentally friendly photovoltaic module shown, the front side of the cell 130 is the upper side of the cell 130 , which is attached to the front adhesive film 120 , and the back side of the cell 130 is the lower side of the cell 130 , which is attached to the back adhesive film 140 .
[0034] The front adhesive film 120 is used to bond the front panel 110 to the cell 130 , and the back adhesive film 140 is used to bond the fluorine-free back panel 150 to the cell 130 , so that the front panel 110 , the front adhesive film 120 , the cell 130 , the back adhesive film 140 and the fluorine-free back panel 150 form an environmentally friendly photovoltaic module.
[0035] Optionally, the front adhesive film 120 and the back adhesive film 130 can be made of the same or different materials, and this application does not make any specific restrictions on this. The front adhesive film 120 and the back adhesive film 130 can be made of at least one of EVA and POE. EVA (ethylene-vinyl acetate copolymer) is a general-purpose polymer with excellent water resistance, corrosion resistance, vibration resistance, heat insulation, aging resistance and chemical stability. POE (polyolefin thermoplastic elastomer) is a high-performance polyolefin that is rubber-elastic at room temperature and has the characteristics of low density, large bending, high low-temperature impact resistance, easy processing and reusability.
[0036] Alternatively, the front plate 110 can be made of polyvinyl fluoride and a thermoplastic material, or polyvinyl fluoride and a thermosetting material. Since polyvinyl fluoride does not belong to perfluoroalkyl and polyperfluoroalkyl substances, the front plate 110 can meet environmental protection requirements.
[0037] The middle layer of the fluorine-free backsheet 150 is a glass fiber matrix containing polypropylene (PP+GF). The PP+GF reinforced structure gives the environmentally friendly photovoltaic module load-bearing capacity and high reliability.
[0038] Optionally, the glass fibers in the glass fiber matrix containing polypropylene used in the middle layer of the fluorine-free backsheet 150 are unidirectional continuous glass fibers, which further improves the load-bearing capacity of the environmentally friendly photovoltaic module.
[0039] Optionally, the thickness of the middle layer of the fluorine-free backsheet 150 is 500 μm-700 μm.
[0040] In some optional embodiments, the fluorine-free backsheet 150 may be a coated fluorine-free backsheet or a composite fluorine-free backsheet.
[0041] Optionally, in the case where the fluorine-free backsheet 150 is a coated fluorine-free backsheet, a structural schematic diagram of the fluorine-free backsheet 150 is as follows: Figure 2 As shown, it includes a first EVA surface 151 , an intermediate layer 152 and a first air surface 153 .
[0042] The first EVA surface 151 is attached to the upper side of the middle layer 152 and to the adhesive film 140 , and the first air surface 153 is attached to the lower side of the middle layer 152 .
[0043] The first EVA surface 151 and the first air surface 153 are fluorine-free coatings.
[0044] During implementation, a first EVA surface 151 is coated on the upper side of the intermediate layer 152, and a first air surface 153 is coated on the lower side of the intermediate layer 152, thereby obtaining a fluorine-free backsheet 150. This backsheet is then bonded to the cell 130 via a backing film 140, and the composite is completed during the lamination process of the photovoltaic module, thereby obtaining an environmentally friendly photovoltaic module.
[0045] Optionally, in the case where the fluorine-free backsheet 150 is a composite fluorine-free backsheet, a structural diagram of the fluorine-free backsheet 150 is as follows: Figure 3 As shown, it includes a second EVA surface 154 , an intermediate layer 152 and a second air surface 155 .
[0046] The second EVA surface 154 is attached to the upper side of the middle layer 152 and to the adhesive film 140 , and the second air surface 155 is attached to the lower side of the middle layer 152 .
[0047] The second EVA surface 154 is a fluorine-free coating or a fluorine-free weather-resistant material, and the second air surface 155 is a fluorine-free weather-resistant material.
[0048] Optionally, the fluorine-free weather-resistant material is a co-extruded polyolefin (PO) material, and the thickness of the second air surface 155 is 200 μm-400 μm. When the second EVA surface is a fluorine-free weather-resistant material, the thickness of the second EVA surface is 200 μm-400 μm.
[0049] During implementation, if the second EVA surface 154 is a fluorine-free coating, the second EVA surface 154 is coated on the upper side of the intermediate layer 152, and the second air surface 155 is attached to the lower side of the intermediate layer 152 to obtain a fluorine-free backsheet 150. This is further bonded to the cell 130 via the adhesive film 140, and the composite is completed during the lamination process of the photovoltaic module, resulting in an environmentally friendly photovoltaic module.
[0050] In practice, if the second EVA surface 154 is a fluorine-free, weather-resistant material, the second EVA surface 154 is laminated to the upper side of the intermediate layer 152, and the second air surface 155 is laminated to the lower side of the intermediate layer 152, thereby obtaining a fluorine-free backsheet 150. This is further bonded to the cell 130 via the adhesive film 140, and the composite is completed during the lamination process of the photovoltaic module, thereby obtaining an environmentally friendly photovoltaic module.
[0051] Optionally, in the case where the fluorine-free backsheet 150 is a composite fluorine-free backsheet, a structural diagram of the fluorine-free backsheet 150 is as follows: Figure 4 As shown, it includes an intermediate layer 152 and a third air surface 156 .
[0052] The upper side of the middle layer 152 is in contact with the adhesive film 140 , and the lower side of the middle layer 152 is in contact with the third air surface 156 .
[0053] The third air surface 156 is made of fluorine-free weather-resistant material.
[0054] Optionally, the fluorine-free weather-resistant material is a co-extruded polyolefin (PO) material, and the thickness of the third air surface 156 is 200 μm-400 μm.
[0055] During implementation, the third air surface 156 is attached to the lower side of the intermediate layer 152 to obtain the fluorine-free backsheet 150. The backsheet 150 is further bonded to the cell 130 via the adhesive film 140 and composited during the lamination process of the photovoltaic module to obtain an environmentally friendly photovoltaic module.
[0056] In some optional embodiments, the present application also provides a photovoltaic system, including the environmentally friendly photovoltaic module as described above.
[0057] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the structure and implementation principle of the photovoltaic system described above can refer to the corresponding structure and implementation principle of the aforementioned embodiment 1, and will not be repeated here.
[0058] The environmentally friendly photovoltaic module of the present application includes a front panel 110, a front adhesive film 120, a battery cell 130, a back adhesive film 140, and a fluorine-free back panel 150. The upper side of the battery cell 130 is bonded to the front adhesive film 120, the upper side of the front adhesive film 120 is bonded to the front panel 110, the lower side of the battery cell 130 is bonded to the back adhesive film 140, and the lower side of the back adhesive film 140 is bonded to the fluorine-free back panel 150. The front panel 110 is made of PVF and a thermoplastic or thermosetting material, and the middle layer 152 of the fluorine-free back panel 150 is a glass fiber substrate containing polypropylene. Based on this, since PVF does not belong to perfluoroalkyl and polyperfluoroalkyl substances, the front panel and the fluorine-free back panel can meet environmental protection requirements, and the fluorine-free back panel uses a glass fiber substrate containing polypropylene as the material of the middle layer, which improves the load-bearing capacity of the photovoltaic module and overcomes the problems of large shrinkage and easy warping of the fluorine-free back panel used in the related art.
[0059] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.
Claims
1. An environmentally friendly photovoltaic module, characterized in that: Including front panel, front adhesive film, battery cell, back adhesive film and fluorine-free back panel; The front plate is made of polyvinyl fluoride and thermoplastic material; The middle layer of the fluorine-free backsheet is a glass fiber substrate containing polypropylene.
2. The environmentally friendly photovoltaic module according to claim 1, characterized in that: The fluorine-free backsheet is a coated fluorine-free backsheet or a composite fluorine-free backsheet.
3. The environmentally friendly photovoltaic module according to claim 2, characterized in that: In the case where the fluorine-free backsheet is a coated fluorine-free backsheet, the fluorine-free backsheet further includes a first EVA surface and a first air surface; The first EVA surface is attached to the upper side of the middle layer and to the adhesive film, and the first air surface is attached to the lower side of the middle layer; The first EVA surface and the first air surface are fluorine-free coatings.
4. The environmentally friendly photovoltaic module according to claim 2, characterized in that: In the case where the fluorine-free backsheet is a composite fluorine-free backsheet, the fluorine-free backsheet further includes a second EVA surface and a second air surface; The second EVA surface is attached to the upper side of the middle layer and to the adhesive film, and the second air surface is attached to the lower side of the middle layer; The second EVA surface is a fluorine-free coating or a fluorine-free weather-resistant material, and the second air surface is a fluorine-free weather-resistant material.
5. The environmentally friendly photovoltaic module according to claim 2, characterized in that: In the case where the fluorine-free backsheet is a composite fluorine-free backsheet, the fluorine-free backsheet further includes a third air surface; The upper side of the intermediate layer is in contact with the adhesive film, and the lower side of the intermediate layer is in contact with the third air surface; The third air surface is made of fluorine-free weather-resistant material.
6. The environmentally friendly photovoltaic module according to claim 4 or 5, characterized in that: The fluorine-free weather-resistant material is co-extruded polyolefin.
7. The environmentally friendly photovoltaic module according to claim 4, characterized in that: The thickness of the second air surface is 200 μm-400 μm. When the second EVA surface is made of a fluorine-free weather-resistant material, the thickness of the second EVA surface is 200 μm-400 μm.
8. The environmentally friendly photovoltaic module according to claim 5, characterized in that: The thickness of the third air surface is 200 μm-400 μm.
9. The environmentally friendly photovoltaic module according to any one of claims 1 to 5, characterized in that: The thickness of the intermediate layer is 500 μm-700 μm.
10. The environmentally friendly photovoltaic module according to any one of claims 1 to 5, characterized in that: The glass fibers in the glass fiber substrate containing polypropylene are unidirectional continuous glass fibers.