Front plate for balcony photovoltaic module, preparation method of front plate and balcony photovoltaic module

Abstract

The invention relates to the technical field of photovoltaic power generation, in particular to a front plate for a balcony photovoltaic module, a preparation method of the front plate and the balcony photovoltaic module. The front plate comprises fibers and resin distributed in the fibers, and the resin is selected from fluorine modified resin; the mass percent of the resin in the front plate is 20%-50%. The front plate has good impact resistance and weather resistance, the problems of performance degradation and yellowing increase after resin aging can be improved, and the stability of a photovoltaic module in the operation process is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of photovoltaic power generation, and in particular to a front plate for a balcony photovoltaic module and a preparation method thereof, and a balcony photovoltaic module. Background Art

[0002] Traditional modules generally use glass as packaging material, but with the trend of photovoltaic applications becoming more and more widespread, glass can no longer meet the existing packaging requirements, especially for photovoltaic modules currently used in the household field, the weight of conventional glass modules is often greater than 10kg, and for balcony scenes where modules need to be suspended and installed, weight is a crucial consideration. At present, composite polymer materials are commonly used to replace glass for the packaging of photovoltaic modules.

[0003] Although polymer front and back panel materials have advantages such as light weight and wide application range, they still have problems such as poor impact resistance and weather resistance, especially a significant decrease in light transmittance after aging during actual outdoor use. Although there are corresponding solutions on the market, they are relatively complex processes and poor performance reliability. Summary of the invention

[0004] The present invention aims to solve one of the technical problems in the related art to at least a certain extent. To this end, the present invention provides a front plate for a balcony photovoltaic module and a preparation method thereof, and a balcony photovoltaic module, wherein the front plate has good impact resistance and weather resistance, and improves the stability of the photovoltaic module during operation.

[0005] To this end, the first aspect of the present invention provides a front plate for a balcony photovoltaic module, the front plate comprising fibers and a resin distributed among the fibers, the resin being selected from fluorine-modified resins;

[0006] The mass percentage of the resin in the front plate is 20%-50%.

[0007] The front plate provided by the present invention comprises a fluorine-modified resin, which has long-term weather resistance. The characteristic functional groups therein can improve the wettability and adhesion to the fiber, enhance the overall transmittance and long-term weather resistance of the material, and effectively solve the performance attenuation and increased yellowing problems of current general resins after aging.

[0008] According to an embodiment of the present invention, the fiber is selected from at least one of glass fiber, aramid fiber, polyamide fiber and ceramic fiber.

[0009] According to an embodiment of the present invention, the resin is selected from fluorine-modified acrylic resin, fluorine-modified epoxy resin, fluorine-modified vinyl resin, or fluorine-modified polyurethane resin.

[0010] According to an embodiment of the present invention, the thickness of the front plate is 0.2-3 mm.

[0011] According to an embodiment of the present invention, the light transmittance of the front panel is greater than or equal to 85%.

[0012] A second aspect of the present invention provides a method for preparing the front plate according to the first aspect, comprising:

[0013] The fiber is placed in an impregnation liquid for impregnation treatment, and then dried to obtain the front plate;

[0014] Wherein, the impregnation liquid includes fluorine-modified resin.

[0015] In this way, a front panel with good impact resistance and weather resistance is obtained, and the preparation method is simple and easy, consistent with the existing component production process, and no further process adaptation and adjustment is required.

[0016] According to an embodiment of the present invention, the impregnation liquid further includes an antioxidant, a coupling agent and a curing agent.

[0017] According to an embodiment of the present invention, the antioxidant is selected from hindered phenol antioxidants, preferably at least one of 2,6-di-tert-butyl-4-methylphenol, bis(3,5-di-tert-butyl-4-hydroxyphenyl) sulfide, and pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate.

[0018] According to an embodiment of the present invention, the coupling agent is selected from at least one of a silane coupling agent, an aluminate coupling agent, and a titanate coupling agent.

[0019] According to an embodiment of the present invention, the curing agent is selected from at least one of amino resin curing agents, isocyanate esters, and aliphatic aldehyde curing agents.

[0020] According to an embodiment of the present invention, the mass ratio of the fluorine-modified resin, the antioxidant, the coupling agent and the curing agent is 100:(1-10):(1-10):(1-5).

[0021] According to an embodiment of the present invention, the temperature of the impregnation liquid is 100-120°C.

[0022] According to an embodiment of the present invention, the immersion treatment time is 0.5-3 minutes.

[0023] According to an embodiment of the present invention, the drying process is carried out at 110-130° C. for 1-5 minutes.

[0024] According to an embodiment of the present invention, the fiber is surface treated before being impregnated.

[0025] According to an embodiment of the present invention, the surface treatment includes at least one of plasma surface treatment and rare earth element surface treatment.

[0026] According to an embodiment of the present invention, the preparation method further comprises: using a traction device to pull the fiber into an impregnation liquid for impregnation treatment.

[0027] According to an embodiment of the present invention, the preparation method further comprises: performing a curing treatment after a drying treatment to obtain the front plate.

[0028] According to an embodiment of the present invention, the temperature of the curing treatment is 120-200°C.

[0029] According to an embodiment of the present invention, the pressure of the curing treatment is 0.01-0.5 MPa.

[0030] According to an embodiment of the present invention, the curing treatment time is 1-3 hours.

[0031] A third aspect of the present invention provides a balcony photovoltaic module, comprising a front plate, a first adhesive film layer, a battery sheet, a second adhesive film layer and a back plate;

[0032] The front plate is the front plate described in the first aspect or the front plate obtained according to the preparation method described in the second aspect.

[0033] Therefore, the balcony photovoltaic module has good impact resistance and weather resistance, ensuring the efficiency of the photovoltaic module during operation.

[0034] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. DETAILED DESCRIPTION

[0035] The embodiments of the present invention are described in detail below. The embodiments described below are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0036] It should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. Further, in the description of the present invention, unless otherwise specified, the meaning of "plurality" is two or more.

[0037] The endpoints and any values ​​of the ranges disclosed in this article are not limited to the precise ranges or values, and these ranges or values ​​should be understood to include values ​​close to these ranges or values. For numerical ranges, the endpoint values ​​of each range, the endpoint values ​​of each range and the individual point values, and the individual point values ​​can be combined with each other to obtain one or more new numerical ranges, which should be considered as specifically disclosed in this article.

[0038] In order to make the present invention more easily understood, certain technical and scientific terms are specifically defined below. Unless otherwise clearly defined elsewhere in this document, all other technical and scientific terms used herein have the meanings commonly understood by those skilled in the art to which the present invention belongs.

[0039] In this document, the terms “include” or “comprising” are open expressions, that is, including the contents specified in the present invention but not excluding other contents.

[0040] As used herein, the terms "optionally", "optional" or "optionally" generally mean that the subsequently described event or circumstance may but need not occur, and that the description includes instances where the event or circumstance occurs and instances where it does not.

[0041] According to an embodiment of the present invention, the present invention provides a front plate for a balcony photovoltaic module, the front plate comprising fibers and a resin distributed in the fibers, the resin being selected from fluorine-modified resins;

[0042] The mass percentage of the resin in the front plate is 20%-50%.

[0043] According to a specific embodiment of the present invention, the type of the fiber is not particularly limited, and as some specific examples, includes but is not limited to glass fiber, aramid fiber, polyamide fiber, ceramic fiber, etc. Specifically, glass fiber yarn can be selected, and its linear density is 1000-2500Tex, and as some specific examples, the density of the glass fiber yarn is 1000Tex, 1500Tex, 2000Tex, 2500Tex, etc.

[0044] According to a specific embodiment of the present invention, the type of the fluorine-modified resin is not particularly limited. Some specific examples include but are not limited to fluorine-modified acrylic resin, fluorine-modified epoxy resin, fluorine-modified vinyl resin, or fluorine-modified polyurethane resin.

[0045] According to a specific embodiment of the present invention, the mass percentage of the resin in the front panel is 20%-50%. As some specific examples, the mass percentage of the resin in the front panel is 20%, 21%, 22%, 23%, 24%, 25%, 26%, 27%, 28%, 29%, 30%, 31%, 32%, 33%, 34%, 35%, 36%, 37%, 38%, 39%, 40%, 41%, 42%, 43%, 44%, 45%, 46%, 47%, 48%, 49%, 50%, etc.

[0046] According to a specific embodiment of the present invention, the light transmittance of the front panel is greater than or equal to 85%. As some specific examples, the light transmittance of the front panel is 85%, 90%, etc.

[0047] According to a specific embodiment of the present invention, the thickness of the front plate is 0.2-3 mm. As some specific examples, the thickness of the front plate is 0.2 mm, 0.5 mm, 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, etc.

[0048] According to an embodiment of the present invention, a second aspect of the present invention provides a method for preparing the front plate of the first aspect, comprising: placing the fiber in an impregnation liquid for impregnation treatment, and drying the fiber to obtain the front plate;

[0049] Wherein, the impregnation liquid includes fluorine-modified resin.

[0050] According to a specific embodiment of the present invention, the impregnation liquid further includes an antioxidant, a coupling agent and a curing agent.

[0051] Specifically, the type of the antioxidant is not particularly limited. Some specific examples include but are not limited to hindered phenol antioxidants, such as 2,6-di-tert-butyl-4-methylphenol, bis(3,5-di-tert-butyl-4-hydroxyphenyl) sulfide, pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate, and the like.

[0052] Specifically, the type of the coupling agent is not particularly limited, and some specific examples include but are not limited to silane coupling agents, aluminate coupling agents, titanate coupling agents, and the like.

[0053] Specifically, the type of the curing agent is not particularly limited, and some specific examples include but are not limited to amino resin curing agents (such as urethane), isocyanate, aliphatic aldehyde curing agents, and the like.

[0054] Specifically, the mass ratio of the resin, antioxidant, coupling agent and curing agent is not particularly limited. As some specific examples, the mass ratio of the fluorine-modified resin, antioxidant, coupling agent and curing agent is 100:(1-10):(1-10):(1-5). For example, the mass ratio of the fluorine-modified resin, antioxidant, coupling agent and curing agent is 100:1:1:1, 100:1:2:2, 100:1:5:1, 100:1:5:5, 100:5:1:1, 100:5:1:5, 100:10:1:1, 100:10:10:5, etc.

[0055] According to a specific embodiment of the present invention, the temperature and immersion time of the immersion liquid are not particularly limited. As some specific examples, the temperature of the immersion liquid is 100-120°C, such as 100°C, 105°C, 110°C, 115°C, 120°C, etc.; the immersion time is 0.5-3min, such as 0.5min, 1min, 1.5min, 2min, 2.5min, 3min, etc. The immersion treatment can be performed in an immersion tank.

[0056] According to a specific embodiment of the present invention, the temperature and time of the drying process are not particularly limited, that is, pre-curing molding can be achieved. As some specific examples, the temperature of the drying process is 110-130°C, such as 110°C, 120°C, 130°C, etc.; the time of the drying process is 1-5 minutes, such as 1 minute, 2 minutes, 3 minutes, 4 minutes, 5 minutes, etc.

[0057] According to a specific embodiment of the present invention, the fiber is surface treated before the fiber is impregnated to increase the reactive groups on the surface of the glass fiber material that can react, and the interaction between the resin and the glass fiber is enhanced through the reaction between the groups, so that the delamination problem between the two is not easy to occur. The surface treatment method is not particularly limited, including but not limited to plasma surface treatment, rare earth element surface treatment, etc.

[0058] According to a specific embodiment of the present invention, the preparation method further comprises: using a traction device to pull the fiber into an impregnation liquid for impregnation treatment. For example, the fiber is surface treated during the process of being drawn into an impregnation tank by the traction device, and then drawn into an impregnation tank having a resin system for impregnation treatment.

[0059] According to a specific embodiment of the present invention, the drying process can also be followed by a cutting process, for example, the material is pulled to a cutting knife by a pulling device and cut into semi-cured sheet materials, and then cured to obtain a finished front panel product.

[0060] Specifically, the temperature, pressure and time of the curing treatment are not particularly limited. As some specific examples, the temperature of the curing treatment is 120-200°C, for example, 120°C, 130°C, 140°C, 150°C, 160°C, 170°C, 180°C, 190°C, 200°C, etc.; the pressure of the curing treatment is 0.01-0.5MPa, for example, 0.01MPa, 0.05MPa, 0.1MPa, 0.15MPa, 0.2MPa, 0.25MPa, 0.3MPa, 0.35MPa, 0.4MPa, 0.45MPa, 0.5MPa, etc.; the time of the curing treatment is 1-3h, for example, 1h, 2h, 3h, etc.

[0061] According to an embodiment of the present invention, a third aspect of the present invention provides a balcony photovoltaic module, including a front plate, a first adhesive film layer, a battery sheet, a second adhesive film layer and a back plate;

[0062] The front plate is the front plate described in the first aspect or the front plate obtained according to the preparation method described in the second aspect.

[0063] According to a specific embodiment of the present invention, the selection of the first adhesive film layer, the battery cell, the second adhesive film layer, and the backplane is not particularly limited, and those skilled in the art may make reasonable selections according to circumstances.

[0064] According to a specific embodiment of the present invention, the preparation method of the balcony photovoltaic module is also not particularly limited, and the photovoltaic module can be obtained by laminating the front panel, the first adhesive film layer, the battery cell, the second adhesive film layer and the back panel in this order.

[0065] According to a specific embodiment of the present invention, the lamination conditions are not particularly limited. As some specific examples, the lamination temperature may be 140-150°C, for example, 140°C, 141°C, 142°C, 143°C, 144°C, 145°C, 146°C, 147°C, 148°C, 149°C, 150°C, etc.; the lamination time may be 10-20min, for example, 10min, 11min, 12min, 13min, 14min, 15min, 16min, 17min, 18min, 19min, 20min, etc.

[0066] The scheme of the present invention will be explained below in conjunction with the embodiments. It will be appreciated by those skilled in the art that the following embodiments are only used to illustrate the present invention and should not be considered as limiting the scope of the present invention. Where specific techniques or conditions are not indicated in the embodiments, the techniques or conditions described in the literature in this area or the product specifications are used. The reagents or instruments used are not indicated by the manufacturer and are all conventional products that can be obtained commercially.

[0067] Example 1

[0068] 1) The glass fiber yarn is introduced into the impregnation tank through a traction device and subjected to ion surface treatment, wherein the glass fiber yarn is a spun yarn with a linear density of 1000 Tex;

[0069] 2) The surface treated glass fiber yarn is continuously drawn into a resin tank of an organic fluorine-modified acrylic resin system for immersion treatment, wherein the organic fluorine-modified acrylic resin includes a base resin, an antioxidant, a coupling agent, and a curing agent, and the mass ratio of each component is 100:5:5:2, the antioxidant is 2,6-di-tert-butyl-4-methylphenol, the coupling agent is a silane coupling agent, and the curing agent is a carbamate curing agent. The temperature of the resin tank is 105°C, and the immersion treatment time is 2 minutes;

[0070] 3) The impregnated glass fiber does not need to be designed with a special mold, but can be directly extruded through a flat extrusion die and pre-cured in a drying oven at 120°C for 3 minutes;

[0071] 4) The pre-cured semi-finished product is pulled to the cutting knife and cut into semi-cured sheet material;

[0072] 5) After further lamination and curing for 2 hours at high temperature of 150°C and 0.05MPa, the finished weather-resistant front panel material is obtained. The total thickness of the material after curing is 0.7mm, the weight percentage of the finished front panel resin is 30%, and the light transmittance of the material after molding can reach 89%;

[0073] 6) A lightweight photovoltaic module is produced by laminating at 145° C. for 15 minutes according to the structure of front panel / film / cell / film / back panel.

[0074] Example 2

[0075] 1) The glass fiber yarn is introduced into the impregnation tank through a traction device and subjected to ion surface treatment, wherein the glass fiber yarn is a spun yarn with a linear density of 1500 Tex;

[0076] 2) The surface treated glass fiber yarn is continuously drawn into a resin tank of an organic fluorine-modified acrylic resin system for immersion treatment, wherein the organic fluorine-modified acrylic resin includes a base resin, an antioxidant, a coupling agent, and a curing agent, and the mass ratio of each component is 100:5:5:2, the antioxidant is 2,6-di-tert-butyl-4-methylphenol, the coupling agent is a silane coupling agent, and the curing agent is a carbamate curing agent. The temperature of the resin tank is 105°C, and the immersion treatment time is 2 minutes;

[0077] 3) The impregnated glass fiber does not need to be designed with a special mold, but can be directly extruded through a flat extrusion die and pre-cured in a drying oven at 120°C for 3 minutes;

[0078] 4) The pre-cured semi-finished product is pulled to the cutting knife and cut into semi-cured sheet material;

[0079] 5) After further lamination and curing for 2 hours at high temperature of 150°C and 0.05MPa, the finished weather-resistant front panel material is obtained. The total thickness of the material after curing is 0.7mm, the weight percentage of the finished front panel resin is 30%, and the light transmittance of the material after molding can reach 88%;

[0080] 6) A lightweight photovoltaic module is produced by laminating at 145° C. for 15 minutes according to the structure of front panel / film / cell / film / back panel.

[0081] Example 3

[0082] 1) The glass fiber yarn is introduced into the impregnation tank through a traction device and subjected to ion surface treatment, wherein the glass fiber yarn is a spun yarn with a linear density of 2500 Tex;

[0083] 2) The surface treated glass fiber yarn is continuously drawn into a resin tank of an organic fluorine-modified acrylic resin system for immersion treatment, wherein the organic fluorine-modified acrylic resin includes a base resin, an antioxidant, a coupling agent, and a curing agent, and the mass ratio of each component is 100:5:5:2, the antioxidant is 2,6-di-tert-butyl-4-methylphenol, the coupling agent is a silane coupling agent, and the curing agent is a carbamate curing agent. The temperature of the resin tank is 105°C, and the immersion treatment time is 2 minutes;

[0084] 3) The impregnated glass fiber does not need to be designed with a special mold, but can be directly extruded through a flat extrusion die and pre-cured in a drying oven at 120°C for 3 minutes;

[0085] 4) The pre-cured semi-finished product is pulled to the cutting knife and cut into semi-cured sheet material;

[0086] 5) After further lamination and curing at high temperature of 150°C and 0.05MPa for 2h, the finished weather-resistant front panel material is obtained. The total thickness of the material after curing is 0.7mm, the weight percentage of the finished front panel resin is 30%, and the light transmittance of the material after molding can reach 88%;

[0087] 6) A lightweight photovoltaic module is produced by laminating at 145° C. for 15 minutes according to the structure of front panel / film / cell / film / back panel.

[0088] Comparative Example 1

[0089] Preparation without pultrusion:

[0090] 1) Spreading the spun glass fiber yarn with a linear density of 1000 Tex and an organic fluorine-modified acrylic resin system directly on the glass fiber yarn, wherein the organic fluorine-modified acrylic resin includes a base resin, an antioxidant, a coupling agent, a curing agent and the like in a mass ratio of 100:5:5:2, the antioxidant is 2,6-di-tert-butyl-4-methylphenol, the coupling agent is a silane coupling agent, and the curing agent is a carbamate curing agent;

[0091] 2) performing a lamination process at 150° C., 0.05 MPa, and 2 h to obtain a front plate material;

[0092] 3) A lightweight photovoltaic module is produced by laminating at 145° C. for 15 minutes according to the structure of front panel / film / cell / film / back panel.

[0093] Since the resin matrix material cannot fully infiltrate the glass fiber yarn, the front panel material itself has bubbles and unevenness. The average thickness of the material after curing is 0.7mm, the weight percentage of the front panel finished product resin is 30%, and the light transmittance of the material after molding is 80%. The finished component after lamination has internal bubbles, exposed glass fibers and other poor appearance, which further causes the material to have obvious performance degradation after long-term use.

[0094] Comparative Example 2

[0095] 1) The glass fiber yarn is introduced into the impregnation tank through a traction device and subjected to ion surface treatment, wherein the glass fiber yarn is a spun yarn with a linear density of 1000 Tex;

[0096] 2) The surface treated glass fiber yarn is continuously drawn into a resin tank of an acrylic resin system for immersion treatment, wherein the acrylic resin includes a base resin, an antioxidant, a coupling agent, and a curing agent, and the mass ratio of each component is 100:5:5:2, the antioxidant is 2,6-di-tert-butyl-4-methylphenol, the coupling agent is a silane coupling agent, and the curing agent is a carbamate curing agent. The temperature of the resin tank is 105°C, and the immersion treatment time is 2 minutes;

[0097] 3) The impregnated glass fiber does not need to be designed with a special mold, but can be directly extruded through a flat extrusion die and pre-cured in a drying oven at 120°C for 3 minutes;

[0098] 4) The pre-cured semi-finished product is pulled to the cutting knife and cut into semi-cured sheet material;

[0099] 5) After further lamination and curing for 2 hours at high temperature of 150°C and 0.05MPa, the finished weather-resistant front panel material is obtained. The total thickness of the material after curing is 0.7mm, the weight percentage of the finished front panel resin is 30%, and the light transmittance of the material after molding can reach 89%;

[0100] 6) A lightweight photovoltaic module is produced by laminating at 145° C. for 15 minutes according to the structure of front panel / film / cell / film / back panel.

[0101] Test example:

[0102] The light transmittance, yellowing after aging and weather resistance of the components after lamination of the front plate materials prepared in the examples and comparative examples were tested respectively.

[0103] Test method for light transmittance: Test the sample according to the spectrophotometer method of GB / T 2410-2008. The wavelength range of the spectrophotometer is set to 380nm~1100nm. Calculate the average light transmittance within the wavelength range. Test at least three samples in each group and take the average value of the test results.

[0104] Yellowing value test method: Test according to ASTM E313-2010. The yellow index of the front plate material before aging is YI 0 , the yellowing index of the irradiated sample after aging is YI, then the yellowing index of the sample ΔYI is calculated according to the formula: ΔYI=YI-YI 0 , take the average of the three test results and round it to one decimal place. The UV irradiation dose and scheme are set according to the program of IEC61215-2:2021, and the cumulative irradiation dose is 60kWh / m 2 .

[0105] Power attenuation test method: After the front panel material is made into a component according to the corresponding lamination method, the power test is carried out according to the standard power test method of IEC61215-2:2021. At the same time, the UV irradiation method is set according to the program of IEC61215-2:2021 for 60kWh / m 2 The accumulated irradiation dose is used to test the power after aging in the same way and calculate the power attenuation.

[0106] The results are shown in Table 1:

[0107] Table 1

[0108]

[0109] The results show that the photovoltaic front panel material prepared by the present invention has a high light transmittance, can improve the performance attenuation and yellowing increase of the resin after aging, and ensure the long-term operation reliability of the lightweight photovoltaic module. At the same time, the finished product can be provided in the form of sheets, which is consistent with the existing module production process, and no further process adaptation and adjustment is required.

[0110] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0111] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A front plate for a balcony photovoltaic module, characterized in that: The front plate includes fibers and a resin distributed in the fibers, wherein the resin is selected from a fluorine-modified resin; The mass percentage of the resin in the front plate is 20%-50%.

2. The front plate according to claim 1, characterized in that The fiber is selected from at least one of glass fiber, aramid fiber, polyamide fiber and ceramic fiber; Optionally, the fluorine-modified resin is selected from fluorine-modified acrylic resin, fluorine-modified epoxy resin, fluorine-modified vinyl resin, or fluorine-modified polyurethane resin.

3. The front plate according to claim 1, characterized in that The thickness of the front plate is 0.2-3 mm.

4. The front plate according to claim 1, characterized in that The light transmittance of the front plate is greater than or equal to 85%.

5. A method for preparing the front plate according to any one of claims 1 to 4, characterized in that: include: The fiber is placed in an impregnation liquid for impregnation treatment, and then dried to obtain the front plate; Wherein, the impregnation liquid includes fluorine-modified resin.

6. The preparation method according to claim 5, characterized in that: The impregnation liquid also includes an antioxidant, a coupling agent and a curing agent; Optionally, the antioxidant is selected from hindered phenol antioxidants, preferably at least one of 2,6-di-tert-butyl-4-methylphenol, bis(3,5-di-tert-butyl-4-hydroxyphenyl) sulfide, and pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate; Optionally, the coupling agent is selected from at least one of a silane coupling agent, an aluminate coupling agent, and a titanate coupling agent; Optionally, the curing agent is selected from at least one of an amino resin curing agent, an isocyanate ester, and an aliphatic aldehyde curing agent; Optionally, the mass ratio of the fluorine-modified resin, antioxidant, coupling agent and curing agent is 100:(1-10):(1-10):(1-5); Optionally, the temperature of the impregnation liquid is 100-120°C; Optionally, the immersion treatment time is 0.5-3min; Optionally, the drying treatment is carried out at 110-130° C. for 1-5 min.

7. The preparation method according to claim 5, characterized in that: Performing surface treatment on the fibers before performing the impregnation treatment on the fibers; Optionally, the surface treatment includes at least one of plasma surface treatment and rare earth element surface treatment.

8. The preparation method according to claim 5, characterized in that: The preparation method further comprises: using a traction device to pull the fiber into an impregnation liquid for impregnation treatment.

9. The preparation method according to claim 5, characterized in that: The preparation method further comprises: performing a curing treatment after a drying treatment to obtain the front plate; Optionally, the curing temperature is 120-200°C; Optionally, the pressure of the curing treatment is 0.01-0.5 MPa; Optionally, the curing treatment time is 1-3 hours.

10. A balcony photovoltaic module, characterized in that: It includes a front plate, a first adhesive film layer, a battery cell, a second adhesive film layer and a back plate; The front plate is the front plate according to any one of claims 1 to 4 or the front plate obtained by the preparation method according to any one of claims 5 to 9.

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