High-transmittance Anti-snow-accretion coating for surface of photovoltaic module, and preparation method therefor

Abstract

The present application belongs to the technical field of anti-snow-accretion coatings, and provides a high-transmittance anti-snow-accretion coating for the surface of a photovoltaic module, and a preparation method therefor. The high-transmittance anti-snow-accretion coating comprises: a high-transmittance substrate layer and an anti-snow-accretion functional layer, which are sequentially stacked from bottom to top, wherein the high-transmittance substrate layer is made of a transparent resin, and the anti-snow-accretion functional layer comprises a snow-melting agent, nanotubes and a solvent. In the present application, by forming an anti-snow-accretion surface on the surface of a photovoltaic module, the effect of preventing snow accretion is achieved, thereby solving the problem of reduced power generation efficiency due to snow accumulated on the surface of a photovoltaic module in winter in high-altitude areas.

Description

Highly transparent anti-snow coating for photovoltaic module surface and method for preparing the same

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to the Chinese patent application No. 202410897236.3, filed on July 5, 2024, and entitled “Highly transparent anti-snow coating for photovoltaic module surface and method for preparing the same”, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0003] The present application belongs to the technical field of anti-snow coating, and particularly relates to a highly transparent anti-snow coating for photovoltaic module surface and a method for preparing the same. BACKGROUND

[0004] A photovoltaic module is the most basic power generation unit of a photovoltaic power station, and its photoelectric conversion efficiency, on-site irradiance, and climate conditions are basic factors that determine the performance and power generation income of the power station. In addition, ensuring the cleanliness of the module surface during operation and maintenance of the power station to reduce the shading of dust, snow, and the like is an important method to improve the output power of the photovoltaic module. There are relatively mature methods for treating dust on the surface of a photovoltaic module, such as manual cleaning, spray dust removal, cleaning robots, self-cleaning coatings, laser cleaning, electric dust removal, and acoustic wave dust removal. However, there is currently no efficient method for removing snow shading, especially for photovoltaic power generation projects in some high-altitude areas, which have the phenomenon of snow cover every winter, seriously affecting the output efficiency of the module. When the thickness of the snow reaches 20 mm, the efficiency of the photovoltaic panel is reduced by 80%.

[0005] Therefore, there is an urgent need to propose a photovoltaic module capable of removing snow to improve the power generation efficiency of the photovoltaic module. SUMMARY

[0006] The present application aims to at least solve the technical problems in the prior art that the snow shading on the surface of a photovoltaic module affects the power generation efficiency, and provides a highly transparent anti-snow coating for the surface of a photovoltaic module and a method for preparing the same.

[0007] In one aspect of the present application, a highly transparent anti-snow coating for the surface of a photovoltaic module is provided, which comprises a highly transparent base layer and an anti-snow functional layer stacked in order from bottom to top; wherein,

[0008] The highly transparent base layer is a transparent resin;

[0009] The anti-snow functional layer comprises a snow-melting agent, nanotubes, and a solvent.

[0010] Optionally, the transparent resin comprises at least one of polycarbonate, polymethyl methacrylate, polyethylene glycol dimethyl acrylate, polyethylene glycol diethyl acrylate, polyethylene glycol dibutyl acrylate.

[0011] Optionally, in the anti-snow accumulation functional layer, the mass fraction of the nanotube is 1%-5%, and the mass fraction of the snow-melting agent is 10%-25%.

[0012] Optionally, the snow-melting agent is a chloride salt or an acetate salt; and / or,

[0013] The nanotube is a boron nitride nanotube or a halloysite nanotube.

[0014] Optionally, the purity of the nanotube is greater than or equal to 95%; and / or,

[0015] The nanotube has an inner diameter size ranging from 15 nm to 40 nm, an outer diameter size ranging from 50 nm to 80 nm, and a length ranging from 0.1 μm to 1 μm; and / or,

[0016] The chloride salt is at least one of sodium chloride, calcium chloride, magnesium chloride, and potassium chloride.

[0017] The acetate salt is at least one of sodium acetate, potassium acetate, and calcium acetate.

[0018] Optionally, the high-transparency base layer has a thickness of 0.05 μm to 0.2 μm; and / or,

[0019] The anti-snow accumulation functional layer has a thickness of 0.04 μm to 0.08 μm.

[0020] Optionally, the high-transparency anti-snow accumulation coating has a light transmittance of 90% to 95%.

[0021] In another aspect of the present application, a method for preparing the high-transparency anti-snow accumulation coating described above on a surface of a photovoltaic module is provided, and the method comprises:

[0022] cleaning the surface of the photovoltaic module;

[0023] spraying a transparent resin on the surface of the photovoltaic module after the cleaning, and drying the transparent resin to form a high-transparency base layer;

[0024] treating the nanotube, the snow-melting agent, and the solvent in an ultrasonic bath for 10-20 min, and then stirring and mixing the nanotube, the snow-melting agent, and the solvent at a rotation speed of 300-400 rpm to form a mixed solution;

[0025] immersing the high-transparency base layer in the mixed solution at least once, and then standing and drying the high-transparency base layer to form an anti-snow accumulation functional layer on the high-transparency base layer.

[0026] Optionally, before spraying the transparent resin on the processed photovoltaic module surface, further comprising:

[0027] The transparent resin is stirred at a speed of 150-300 rpm for 20-30 min and ultrasonically treated for 30-50 min.

[0028] Optionally, the spraying treatment has an air pressure of 0.2-0.7 MPa, an air flow of 50-60 L / min, a spraying distance of 200-300 mm, and a moving speed of 50-100 mm / s; and / or,

[0029] The nanotube, the snow-melting agent, and the solvent are mixed, comprising:

[0030] The nanotube, the snow-melting agent, and the solvent are treated in an ultrasonic bath for 15 min, and then stirred and mixed at a speed of 300-400 rpm.

[0031] The application provides a high-transparency anti-snow coating for a photovoltaic module surface and a preparation method thereof, wherein the high-transparency anti-snow coating comprises, from bottom to top, a high-transparency base layer and an anti-snow functional layer which are sequentially stacked; the high-transparency base layer is a transparent resin; and the anti-snow functional layer comprises a snow-melting agent, a nanotube, and a solvent. The application forms an anti-snow surface on the photovoltaic module surface, thereby achieving the effect of resisting snow accumulation and solving the problem of reduced power generation efficiency of photovoltaic modules in high-altitude areas in winter due to snow accumulation on the surface of the photovoltaic modules. BRIEF DESCRIPTION OF DRAWINGS

[0032] Fig. 1 is a flow chart of a preparation method of the high-transparency anti-snow coating for a photovoltaic module surface according to the application;

[0033] Fig. 2 is a glass panel with a high-transparency anti-snow coating according to Example 1 of the application;

[0034] Fig. 3 is a snow-melting situation of the glass panel with a high-transparency anti-snow coating according to Example 1 of the application;

[0035] Fig. 4 is an original glass panel according to Comparative Example 1 of the application;

[0036] Fig. 5 is a snow accumulation situation of the original glass panel according to Comparative Example 1 of the application. DETAILED DESCRIPTION

[0037] In order for those skilled in the art to better understand the technical solutions of the present application, the present application will be further described in detail below in conjunction with the drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not used to limit the disclosure. The described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the described embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0038] In one aspect of the present application, a high-transmittance anti-snow accumulation coating for the surface of a photovoltaic module is provided, comprising: a high-transmittance base layer and an anti-snow function layer stacked in order from bottom to top; wherein the high-transmittance base layer is a transparent resin; the anti-snow function layer comprises a snow-melting agent, nanotubes, and a solvent.

[0039] In the present embodiment, by stacking the high-transmittance base layer and the anti-snow function layer, the light transmittance can be ensured to ensure that the light absorption efficiency of the photovoltaic module is not affected, and at the same time, the snow accumulation on the photovoltaic module can be effectively removed, the accumulation of snowflakes, raindrops, hail, etc. on the surface of the photovoltaic module is reduced, and the power generation efficiency of the photovoltaic module is improved.

[0040] It should be understood that the high-transmittance anti-snow accumulation coating should be provided above the glass panel of the photovoltaic module to prevent a large amount of snow and other substances from accumulating on the surface of the photovoltaic module, therefore, the high-transmittance anti-snow accumulation coating needs to have good light transmittance, for example, the light transmittance of the high-transmittance anti-snow accumulation coating is 90%-95%, which can meet the light absorption requirements of the photovoltaic module.

[0041] It should be noted that the material and thickness of the transparent resin are not specifically limited in the present embodiment, as long as the high light transmittance and appropriate strength are met, and the anti-snow function layer can be used to bear.

[0042] In some optional embodiments, the thickness of the high-transmittance base layer is 0.05-0.2 μm, for example, 0.05 μm, 0.1 μm, 0.15 μm, 0.2 μm, etc.

[0043] In some other optional embodiments, the transparent resin comprises at least one of polycarbonate, polymethyl methacrylate, polyethylene glycol dimethyl acrylate, polyethylene glycol dimethyl acrylate, polyethylene glycol dimethyl acrylate, polyethylene glycol dimethyl acrylate.

[0044] In the embodiment, the high-transparency base layer adopts a transparent resin, which can ensure the light transmittance of the high-transparency anti-snow coating, so that the introduced coating does not affect the light absorption of the photovoltaic module. In addition, the high-transparency base layer also provides a carrier for the introduction of the anti-snow functional layer, which can meet the functional requirements of the snow-melting agent content and distribution of the anti-snow functional layer. Furthermore, the high-transparency base layer can also serve as a "soft foundation" for the high-transparency anti-snow coating, which can bounce snowflakes, raindrops, hail and other objects during service, further reducing the accumulation of snowflakes, raindrops, hail and other objects on the surface of the photovoltaic module.

[0045] It should be further pointed out that the thickness and component distribution of the anti-snow functional layer are not specifically limited in the embodiment, and the anti-snow effect can be met.

[0046] In some optional embodiments, the thickness of the anti-snow functional layer is 0.04 μm-0.08 μm, for example, 0.04 μm, 0.06 μm, 0.08 μm, etc.

[0047] In other optional embodiments, the mass fraction of nanotubes in the anti-snow functional layer is 1%-5%, for example, 1%, 2%, 3%, 4%, 5%, etc. That is, the mass fraction of the nanotubes in the total content of all components in the anti-snow functional layer is 1%-5%.

[0048] As a further optional solution, the nanotubes are boron nitride nanotubes or halloysite nanotubes. The boron nitride nanotubes have a graphite-like planar hexagonal network structure, have a certain adsorption capacity and good mechanical properties, which can help to increase the content of the snow-melting agent in the anti-snow functional layer, and also can increase the wear resistance of the high-transparency anti-snow coating. In addition, the halloysite nanotubes have a certain hollow structure, have excellent heat conduction performance and adsorption performance, and also can increase the content of the snow-melting agent in the anti-snow functional layer, and improve the snow-melting effect.

[0049] As a further optional solution, the purity of the nanotubes is greater than or equal to 95%.

[0050] As a further optional solution, the nanotubes have an inner diameter size range of 15-40 nm, an outer diameter size range of 50-80 nm, and a length range of 0.1-1 μm. Based on the large aspect ratio of the nanotubes, the mixing requirement with the snow-melting agent can be met, more snow-melting agent can be adsorbed, the content of the snow-melting agent is increased, and the snow-melting effect is improved.

[0051] In other optional embodiments, the mass fraction of the snow-melting agent in the anti-snow functional layer is 10%-25%, for example, 10%, 15%, 18%, 20%, 23%, 25%, etc. That is, the mass fraction of the snow-melting agent in the total content of all components in the anti-snow functional layer is 10%-25%.

[0052] As a further optional solution, the snow-melting agent is a chlorinated salt or an acetate salt.

[0053] As a further optional solution, the chlorinated salt is at least one of sodium chloride, calcium chloride, magnesium chloride, and potassium chloride. Such a salt has a lower freezing point, and it is difficult to form ice blocks after the salt is dissolved in snow water, thereby avoiding the formation of ice blocks on the surface of the photovoltaic module and helping to improve the efficiency of snow removal.

[0054] As a further optional solution, the acetate salt is at least one of sodium acetate, potassium acetate, and calcium acetate. Such a compound can exert a snow-melting effect at a lower temperature, can lower the solidification point of ice and snow, can accelerate the melting of ice and snow, and has the effects of peeling off ice and snow and preventing re-freezing, and such a compound has a smaller impact on the environment.

[0055] As a further optional solution, the chlorinated salt or the acetate salt has a purity of greater than or equal to 96%.

[0056] In other optional embodiments, in the anti-snow functional layer, in addition to the snow-melting agent and the nanotubes, the remaining components are a solvent, and the mass fraction of the solvent is 70-89%, for example, 70%, 75%, 80%, 85%, 89%, or the like. That is, in the total content of all components in the anti-snow functional layer, the mass fraction of the solvent is 70-89%.

[0057] As a further optional solution, the solvent is pure water.

[0058] In the present embodiment, based on the anti-snow functional layer being arranged on the high-transmittance base layer, snowflakes and the like are melted when they initially land on the surface of the photovoltaic panel, and can slide along the inclination direction of the photovoltaic panel, thereby ensuring that the surface of the photovoltaic panel is not covered with snow. In addition, based on the addition of other nanotubes such as halloysite nanotubes in the anti-snow functional layer, the surface hardness of the high-transmittance anti-snow coating can be improved, and the anti-sand scouring ability of the coating can be improved, thereby avoiding the abrasion of the surface of the coating due to sand scouring and affecting the light transmittance of the coating. Furthermore, based on the large specific surface area of the nanotube components such as halloysite nanotubes, the content of the snow-melting agent such as the chlorinated salt or the acetate salt in the anti-snow functional layer can be increased, and the snow-melting effect can be improved. At the same time, the chlorinated salt or the acetate salt can also have a slow-release effect during the service of the coating, thereby further improving the service life of the anti-snow functional layer.

[0059] Of course, it should be understood that the snow-melting agent in the anti-snow functional layer of the present embodiment can also have the effect of melting hail and the like, thereby effectively improving the efficiency of snow removal and further improving the efficiency of photovoltaic power generation. That is, the anti-snow functional layer can not only remove snow, but also remove hail, rainwater, and the like to some extent.

[0060] As shown in FIG. 1, in another aspect of the present application, a method S100 for preparing the high-transmittance anti-snow accumulation coating as described above on the surface of a photovoltaic module is provided, comprising the following specific steps S110-S140:

[0061] S110, cleaning the surface of the photovoltaic module.

[0062] Specifically, the surface of the photovoltaic module is pretreated so that the cleanliness of the treated surface reaches Sa2.5.

[0063] It should be noted that the photovoltaic module is not specifically limited in the embodiment, which can be a new photovoltaic module or a used photovoltaic module.

[0064] In some optional embodiments, the surface of the used photovoltaic module is treated by using reagents such as alcohol and acetone to remove oil and dirt, and the cleanliness reaches Sa2.5.

[0065] In another optional embodiment, the new photovoltaic module is pretreated, that is, the new photovoltaic module is cleaned to keep the surface clean, and the cleanliness reaches Sa2.5.

[0066] S120, spraying transparent resin on the surface of the treated photovoltaic module to form a high-transmittance base layer after drying.

[0067] Specifically, one or more transparent resins are selected and mixed, and stirred at a speed of 150-300 rpm to make the mixture uniform, and then ultrasonic vibration is performed for 30-50 min to fully discharge air bubbles, which helps to improve the density of the high-transmittance base layer. Then, the formed transparent resin is sprayed on the cleaned surface of the photovoltaic module, and after spraying in multiple passes, the high-transmittance base layer is formed by natural drying to film formation for 2 hours.

[0068] In some optional embodiments, the transparent resin comprises at least one of polycarbonate, polymethyl methacrylate, polyethylene glycol dimethyl acrylate, polyethylene glycol dimethyl acrylate, and polyethylene glycol dimethyl acrylate.

[0069] In another optional embodiment, the thickness of the high-transmittance base layer is 0.05-0.2 μm, for example, 0.05 μm, 0.1 μm, 0.15 μm, 0.2 μm, etc.

[0070] In another optional embodiment, the spraying process parameters are as follows: air pressure is 0.2-0.7 MPa, air flow is 50-60 L / min, spraying distance is 200-300 mm, and moving speed is 50-100 mm / s.

[0071] S130, the nanotubes, the snow-melting agent and the solvent are treated in the ultrasonic bath for 10-20 min, and then stirred and mixed at a rotating speed of 300-400 rpm to form a mixed solution.

[0072] Specifically, the nanotubes with a mass fraction of 1%-5%, the snow-melting agent with a mass fraction of 10%-25%, and the solvent with a mass fraction of 70-89% are mixed, placed in an ultrasonic bath for 10-20 min, and then stirred at a rotating speed of 300-400 rpm for a long time to uniformly disperse the added nanotubes and fully dissolve the snow-melting agent, thereby forming a mixed solution.

[0073] In some optional embodiments, the nanotubes are boron nitride nanotubes or halloysite nanotubes.

[0074] In some other optional embodiments, the snow-melting agent is a chloride salt or an acetate salt.

[0075] As a further optional solution, the chloride salt is at least one of sodium chloride, calcium chloride, magnesium chloride, and potassium chloride.

[0076] As a further optional solution, the acetate salt is at least one of sodium acetate, potassium acetate, and calcium acetate.

[0077] S140, the high-transparency substrate layer is immersed in the mixed solution and left to stand for 30 min, and then naturally air-dried, and the operation is repeated 0-3 times to form an anti-snow accumulation functional layer on the high-transparency substrate layer.

[0078] In some optional embodiments, the anti-snow accumulation functional layer has a thickness of 0.04-0.08 μm, for example, 0.04 μm, 0.06 μm, or 0.08 μm.

[0079] It should be noted that the number of times of immersing the high-transparency substrate layer in the mixed solution and leaving it to stand for 30 min and then naturally air-drying is not specifically limited, and the operation can be performed once or repeated multiple times, for example, 1-3 times, to coat a thicker anti-snow accumulation functional layer on the high-transparency substrate layer.

[0080] It should be understood that the specific number of repetitions can be determined according to the condition of the anti-snow accumulation functional layer formed on the high-transparency substrate layer, for example, after the operation is performed once, the anti-snow accumulation functional layer formed can completely cover the high-transparency substrate layer and has a thickness that meets the requirement, and thus the operation does not need to be repeated multiple times, i.e., 0 times. If after the operation is performed once, the anti-snow accumulation functional layer formed cannot completely cover the high-transparency substrate layer and the thickness also does not meet the requirement, the operation needs to be repeated multiple times, i.e., the high-transparency substrate layer is immersed in the mixed solution and left to stand for multiple times to be air-dried, to meet the application requirement.

[0081] The embodiment adopts a spraying and infiltration combined treatment method, and can quickly realize large-area photovoltaic module surface protection. Compared with a conventional self-cleaning coating preparation method, the method has a simpler implementation process and is more environmentally friendly.

[0082] It should be noted that, taking a certain high photovoltaic power station as an example, the project site is covered with snow from November to April each year, and the snow thickness can reach 600 mm. According to the calculation, the snow will cause a 6% loss of the annual power generation benefit of the photovoltaic panel. However, based on the method proposed in the embodiment, the anti-snow accumulation coating is arranged on the surface of the photovoltaic module, which can effectively prevent snow deposition and avoid the 6% loss of the annual power generation benefit.

[0083] The high-transparency anti-snow accumulation coating for the surface of the photovoltaic module and the snow removal effect thereof will be further described below in combination with specific examples:

[0084] Example 1

[0085] This example takes the snow accumulation phenomenon on the surface of the photovoltaic module of a certain high-altitude photovoltaic power station as an example, sets a high-transparency anti-snow accumulation coating on the surface, and describes the snow removal effect, including the following steps:

[0086] Forming the high-transparency anti-snow accumulation coating on the surface of the photovoltaic module includes:

[0087] S1, performing alcohol, acetone and other surface oil and dust removal treatment on the surface of the served photovoltaic module, and the cleanliness of the treated surface reaches Sa2.5.

[0088] S2, selecting polyethylene glycol dimethyl acrylate and polyethylene glycol dimethyl acrylate as the transparent resin for mixing the high-transparency base layer at a ratio of 1:1, stirring at a speed of 190 rpm for 20 min to make them uniformly mixed, and then ultrasonic vibration for 35 min to fully discharge air bubbles.

[0089] S3, preparing the high-transparency base layer on the cleaned surface of the photovoltaic module by spraying, and the spraying process parameters are as follows: air pressure is 0.3 MPa, air flow is 50 L / min, spraying distance is 220 mm, and moving speed is 60 mm / s; after two passes, the coating is naturally dried for 2 hours to form a film.

[0090] S4, configuring 2% halloysite nanotubes, 20% sodium acetate and 78% pure water, placing them in an ultrasonic bath for 15 min, and then stirring at a speed of 350 rpm for a long time to uniformly disperse the added halloysite nanotubes and fully dissolve the sodium acetate.

[0091] S5, immersing the high-transparency base layer prepared in step S3 in the solution prepared in step S4, naturally air-drying after standing for 30 min, and repeating the process for 3 times.

[0092] As shown in Figure 2, a high-transparency anti-snow accumulation coating is prepared on the glass panel of the photovoltaic module, and the transparency is good. The light transmittance of the high-transparency anti-snow accumulation coating is 93%, and the thickness of the high-transparency base layer is 0.1 μm.

[0093] The snow removal effect of the surface of the photovoltaic module is also tested in this embodiment, as shown in Figure 3, and there is basically no snow on the glass panel of this embodiment 1.

[0094] Comparative Example 1

[0095] This example takes the snow accumulation phenomenon on the surface of the photovoltaic module of a high-altitude photovoltaic power station as an example, and directly describes the snow removal effect:

[0096] As shown in Figure 4, the glass panel of the photovoltaic module is not provided with a high-transparency anti-snow accumulation coating, and the transparency is poorer than that of the embodiment 1.

[0097] The snow removal effect of the glass panel of the photovoltaic module is also tested in this comparative example 1, as shown in Figure 5, and there is a layer of snow on the glass panel of this comparative example 1.

[0098] It should be understood that the glass panel of the photovoltaic module of this comparative example 1 and the embodiment 1 are in the same environment, i.e., the snow removal effect of the glass panel of the photovoltaic module is tested under the same snowfall conditions, the same snowfall amount and the same snowfall time.

[0099] In summary, in combination with the comparative example 1 and the embodiment 1, it can be seen that when the high-transparency anti-snow accumulation coating is not provided on the glass panel of the photovoltaic module, the glass panel is easy to stick with dust, rainwater, snow and other substances, and the transparency is poor; when the high-transparency anti-snow accumulation coating is provided on the glass panel of the photovoltaic module, the glass panel is not easy to stick with dust, rainwater, snow and other substances, and can maintain good transparency. Secondly, the glass panel of the photovoltaic module provided with the high-transparency anti-snow accumulation coating can effectively remove snow, avoid the accumulation of thick snow on the surface, and thus keep the glass panel from being blocked, effectively improving the power generation efficiency.

[0100] The present application proposes a high-transparency anti-snow accumulation coating and a preparation method thereof, which has the following beneficial effects over the prior art: the high-transparency anti-snow accumulation coating prepared on the surface of the photovoltaic module of the present application adopts the structure of a high-transparency base layer plus an anti-snow function layer, has a snow melting effect, and can also ensure good light transmittance, effectively solving the problem of snow accumulation on the surface of the photovoltaic module and improving the power generation efficiency of the photovoltaic power station; secondly, the high-transparency base layer is formed on the surface of the photovoltaic module by spraying, which is simple to operate and can quickly realize the protection of the surface of a large-area photovoltaic module, and compared with the conventional preparation method of the self-cleaning coating, the method of the present application is simpler and more environmentally friendly.

[0101] It can be understood that the above embodiments are only exemplary embodiments for illustrating the principles of the present application, and the present application is not limited thereto. Various modifications and improvements can be made by those of ordinary skill in the art without departing from the spirit and essence of the present application, and these modifications and improvements are also considered to be within the protection scope of the present application.

Claims

1. A high-transparency anti-accumulation-of-snow coating for the surface of a photovoltaic module, characterized in that, The high-transmittance anti-snow accumulation coating comprises a high-transmittance base layer and an anti-snow accumulation functional layer which are sequentially stacked from bottom to top. The high-transmittance base layer is a transparent resin. The anti-snow accumulation functional layer comprises a snow-melting agent, nanotubes and a solvent.

2. The high transparency anti-snow accumulation coating according to claim 1, characterized in that, The transparent resin comprises at least one of polycarbonate, polymethyl methacrylate, polyethylene glycol dimethyl acrylate, polyethylene glycol diethyl acrylate and polyethylene glycol dibutyl acrylate.

3. The high transparency anti-snow accumulation coating according to claim 1, wherein, In the anti-snow accumulation functional layer, the mass fraction of the nanotubes is 1% to 5%, and the mass fraction of the snow-melting agent is 10% to 25%.

4. The high transparency anti-snow accumulation coating according to claim 1, wherein, The snow-melting agent is a chloride salt or an acetate salt; and / or The nanotubes are boron nitride nanotubes or halloysite nanotubes.

5. The high transparency anti-snow accumulation coating according to claim 4, wherein, The purity of the nanotubes is greater than or equal to 95%; and / or The nanotubes have an inner diameter size ranging from 15 nm to 40 nm, an outer diameter size ranging from 50 nm to 80 nm and a length ranging from 0.1 μm to 1 μm; and / or The chloride salt is at least one of sodium chloride, calcium chloride, magnesium chloride and potassium chloride. The acetate salt is at least one of sodium acetate, potassium acetate and calcium acetate.

6. The high transparency anti-snow accumulation coating according to any one of claims 1 to 5, characterized in that, The thickness of the high-transmittance base layer is 0.05 μm to 0.2 μm; and / or The thickness of the anti-snow accumulation functional layer is 0.04 μm to 0.08 μm.

7. The high transparency anti-snow accumulation coating according to any one of claims 1 to 5, characterized in that, The high-transmittance anti-snow accumulation coating has a light transmittance of 90% to 95%.

8. A method of producing a high-transparency, snow-accumulation-preventing coating layer as claimed in any one of claims 1 to 7 on the surface of a photovoltaic module, characterized by, The method comprises: cleaning the surface of the photovoltaic module; spraying transparent resin on the surface of the treated photovoltaic module, and then drying to form a high-transmittance base layer; treating the nanotubes, the snow-melting agent and the solvent in an ultrasonic bath for 10 to 20 minutes, and then stirring and mixing them at a rotation speed of 300 to 400 rpm to form a mixed solution; immersing the high-transmittance base layer in the mixed solution and then drying to form an anti-snow accumulation functional layer on the high-transmittance base layer.

9. The method of claim 8, wherein, Before spraying the transparent resin on the surface of the treated photovoltaic module, the method further comprises: stirring the transparent resin at a rotation speed of 150 to 300 rpm for 20 to 30 minutes, and then ultrasonic treating for 30 to 50 minutes.

10. The method of claim 8, wherein, The air pressure for the spraying treatment is 0.2 to 0.7 MPa, the air flow is 50 to 60 L / min, the spraying distance is 200 to 300 mm, and the moving speed is 50 to 100 mm / s.

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