Panel and preparation method therefor, and photovoltaic module

Abstract

A panel (12) and a preparation method therefor, and a photovoltaic module (1). The panel (12) comprises a visual board (122) and a coating, wherein the visual board (122) comprises coating areas (1222) and a non-coating area (1224) defined by the coating areas (1222), the coating being arranged on the coating areas (1222), at least two coating areas (1222) being provided, and the at least two coating areas (1222) being distributed in an array.

Description

Panel and preparation method thereof and photovoltaic module

[0001] Priority information

[0002] This application claims priority and benefits of patent application No. 202410214118.8 filed with the State Intellectual Property Office of China on February 26, 2024, and priority and benefits of patent application No. 202510009439.9 filed with the State Intellectual Property Office of China on January 2, 2025, and the entire text of which is incorporated herein by reference. Technical Field

[0003] The present application relates to the field of photovoltaic technology, and in particular to a panel and a preparation method thereof, and a photovoltaic module. Background Art

[0004] With the development of photovoltaic technology, the application of photovoltaic modules is becoming an important sub-sector in the field of photovoltaic technology. At present, the market requires photovoltaic modules to provide better photoelectric performance, as well as beautiful appearance and bright colors. Therefore, silk-screen photovoltaic glass and its photovoltaic modules are favored by the market, and products such as curved roof tiles, roof-integrated photovoltaic modules, and glass curtain walls are promoted.

[0005] Most existing screen printing technologies use screen printing or coating on the entire glass surface. After screen printing, the glass loses significant light transmittance, resulting in low output power for the resulting photovoltaic modules. Conventional inks are screen printed, then heated, dried, and solidified before being tempered. During the tempering process, the ink is susceptible to discoloration and distortion at high temperatures. Choosing high-temperature ink screen printing results in limited color options, making it difficult to meet customers' dual demands for appearance and power. Summary of the Invention

[0006] A first aspect of the present application is to provide a panel.

[0007] A second aspect of the present application is to provide a photovoltaic module.

[0008] A third aspect of the present application is to provide a method for preparing a panel.

[0009] A fourth aspect of the present application is to provide another panel.

[0010] A fifth aspect of the present application is to provide another photovoltaic module.

[0011] The sixth aspect of the present application is to provide yet another panel.

[0012] The seventh aspect of the present application is to provide another method for preparing a panel.

[0013] An eighth aspect of the present application is to provide yet another photovoltaic module.

[0014] The panel provided in the first aspect of the present application is used for a photovoltaic module, and the panel includes: a visualization board including a coating area and a non-coating area defined by the coating area; and a coating provided on the coating area.

[0015] The panel provided in the present application includes a visualization board, and the visualization board includes a coating area and a non-coating area defined by the coating area; the coating is provided on the coating area. The panel of the present application is provided with a coating area and a non-coating area on one side of the visualization board, and a coating is provided on the coating area, so that the overall silk screen is adjusted to a partial silk screen, which not only ensures the overall aesthetics of the photovoltaic module panel, but also ensures that the photovoltaic module has a higher light transmittance, and thus has a higher power generation power, avoids poor light transmittance, and reduces the loss of power generation efficiency. Among them, the visualization board of the present application can be a glass plate or other visual board.

[0016] In the above technical solution, optionally, the number of coating areas is at least two, at least two coating areas are distributed in an array, the interval between two adjacent coating areas is 5 mm to 10 mm, and / or the width and length of each coating area are 2 mm to 5 mm.

[0017] In this technical solution, the interval between two adjacent coating areas and the width and length of each coating area are limited, so that the coating areas and non-coating areas can be arranged alternately, avoiding the problem of the coating areas being too concentrated or too dispersed, and improving the overall effect.

[0018] In the above technical solution, optionally, the number of coating areas per square inch of the visualization board is greater than or equal to 10 and less than or equal to 1000.

[0019] In this technical solution, the number of coating areas per square inch on the visualization board is limited, which can avoid the problem of the coating areas being too concentrated or too dispersed, improve the aesthetics, and also improve the light transmittance.

[0020] In the above technical solution, optionally, the number of coating areas per square inch of the visualization board is greater than or equal to 150 and less than or equal to 250.

[0021] In this technical solution, the number of coating areas per square inch on the visualization board is limited to between 150 and 250, which further improves the aesthetics and light transmittance.

[0022] In the above technical solution, optionally, the panel further includes: at least two positioning holes, which are spaced apart on the visualization plate, and the positioning holes extend along the thickness direction of the visualization plate.

[0023] In this technical solution, by setting positioning holes on the panel, the visualization board and the screen mold can be well positioned, the visualization board and the screen mold can fit tightly together, and precision printing can be completed continuously on the visualization board. It has the advantages of high printing efficiency and strong practicality, and no positional offset will occur during the printing process.

[0024] In the above technical solution, optionally, the maximum distance between any two points on the coating area is the first distance, the minimum distance between any two adjacent coating areas is the second distance, and the ratio of the first distance to the second distance is greater than or equal to 0.5 and less than or equal to 1.5.

[0025] In this technical solution, the length of the coating area is limited to be approximately the same as the spacing between the coating areas, so that the coating area and the non-coating area are distributed more evenly, and the problem of the coating area being too concentrated or too dispersed will not occur, thereby improving the overall effect.

[0026] In the above technical solution, optionally, the coating is transparent pearlescent ink.

[0027] In this technical solution, the ordinary coating is adjusted to transparent pearlescent ink. During the tempering process, the transparent pearlescent ink is not prone to discoloration and distortion due to high temperature. High-temperature coating screen printing can be selected to improve printing efficiency.

[0028] In the above technical solution, optionally, the transparent pearlescent ink can absorb light with a wavelength greater than or equal to 100 nm and less than 300 nm, and the transparent pearlescent ink can transmit light with a wavelength greater than or equal to 300 nm and less than or equal to 1100 nm.

[0029] In this technical solution, transparent pearlescent ink has good light transmittance and can transmit visible light, part of ultraviolet light and part of near-infrared light. This can make the panel have good light transmittance and thus have higher power generation capacity, avoiding poor light transmittance and reducing power generation efficiency loss.

[0030] In the above technical solution, optionally, the light transmittance of the panel is greater than or equal to 85%.

[0031] In this technical solution, since the overall silk screen printing is adjusted to alternate silk screen printing in the coating area and the non-coating area, not only the overall aesthetics of the photovoltaic module panel is guaranteed, but the panel's transmittance is greater than or equal to 85%, ensuring that the photovoltaic module has a higher power generation capacity.

[0032] In the above technical solution, optionally, the thickness of the coating is greater than or equal to 20 μm and less than or equal to 30 μm.

[0033] In this technical solution, the thickness of the coating should not be too thick, as too thick a coating will result in poor light transmittance and reduced power generation. The thickness of the coating should not be too thin, as too thin a coating will result in reduced overall aesthetics.

[0034] In the above technical solution, optionally, the visualization board includes a curved surface structure, and the radius of the curved surface structure is greater than or equal to 30 mm and less than or equal to 150 mm.

[0035] In this technical solution, if the arc radius is too large, the peak position will be too flat, which is not conducive to light dispersion. If the arc radius is too small, it will be difficult to manufacture the panel. Therefore, setting the radius of the curved surface structure between 30mm and 150mm can ensure the light dispersion effect and facilitate panel manufacturing. For example, the radius of the curved surface structure is 40mm, 80mm, or 120mm.

[0036] In the above technical solution, optionally, the thickness of the visualization board is greater than or equal to 3 mm and less than or equal to 8 mm.

[0037] In this technical solution, the visualization board should not be too thick. A thicker board will not disperse light properly and increase manufacturing costs. A thinner board will reduce mechanical strength and easily break under external forces. Therefore, the optimal thickness is 3mm or greater and 8mm or less, for example, 4mm, 5mm, or 6mm.

[0038] The second technical solution of the present application provides a photovoltaic assembly, including: a panel provided by any technical solution in the first technical solution of the present application.

[0039] Since the photovoltaic module provided in the present application includes the panel provided by any one of the technical solutions in the first aspect of the present application, it has all the beneficial effects of the panel provided by any one of the technical solutions in the first aspect of the present application, which will not be repeated here.

[0040] In some technical solutions, optionally, the photovoltaic module also includes: a backplane layer, which is arranged on the side of the panel away from the coating; a battery layer, which is arranged between the backplane layer and the panel; a first adhesive layer, which is arranged between the panel and the battery layer; and a second adhesive layer, which is arranged between the backplane layer and the battery layer.

[0041] In this technical solution, the first adhesive layer can be a high-cutoff encapsulation film, preferably one of high-cutoff EVA, POE, EPE or PVB films, with a thickness of 0.5mm-0.8mm; the battery layer is preferably one of XBC, MWT, and shingled batteries without metal grid lines, with positive and negative metal electrodes drawn out from the back, followed by a battery cell with grid lines on both sides, such as PERC, TOPCON, and HJT. The second adhesive layer can be a highly transparent encapsulation film, preferably one of high-cutoff EVA, POE, EPE or PVB films, with a thickness of 0.5mm-0.8mm; the backplane layer is a flexible polymer material, such as one of PET or CPC or HPC materials, with a thickness of 0.4mm to 0.8mm. The backplane layer of the present application is a flexible polymer material, so it can be bent into different shapes and suitable for different installation substrates. At the same time, the selection of the battery layer can further improve the power generation efficiency.

[0042] The third aspect of the present application provides a method for preparing a panel, comprising: treating a visualization board with an oleophilic treatment agent, the visualization board including a coating area and a non-coating area defined by the coating area; preparing a coating on the coating area with a silk screen mold to obtain a panel.

[0043] The method for preparing the panel of the present application includes first treating the visualization plate with an oleophilic treatment agent to improve the bonding strength between the coating and the visualization plate after silk screen printing. The visualization plate includes a coating area and a non-coating area defined by the coating area. Then, a coating is prepared on the coating area using a silk screen mold to obtain a panel. The present application adjusts the overall silk screen printing to partial silk screen printing, which not only ensures the overall aesthetics of the photovoltaic module panel, but also ensures that the photovoltaic module has a high power generation capacity, avoids poor light transmittance, and reduces power generation efficiency losses.

[0044] In some technical solutions, optionally, the lipophilic treatment agent includes at least one of hexamethyldisiloxane, trimethylsiloxane, and dimethylchlorosilane.

[0045] In this technical solution, by selecting an oleophilic treatment agent, the bonding strength between the ink and the visualization board can be further improved, thus avoiding the problem of ink separation.

[0046] In some technical solutions, optionally, the screen mold is provided with a through hole corresponding to each coating area, and the number of through holes per square inch of the screen mold is greater than or equal to 10 and less than or equal to 1000.

[0047] In this technical solution, the number of through holes per square inch on the screen mold is limited, which can avoid the problem of the coating area being too concentrated or too dispersed, improve the aesthetics of the panel, and also increase the light transmittance.

[0048] In some technical solutions, optionally, the number of through holes per square inch of the screen mold is greater than or equal to 150 and less than or equal to 250.

[0049] In this technical solution, the number of through holes per square inch on the screen mold is limited to between 150 and 250, which further improves the aesthetics and light transmittance.

[0050] The fourth technical solution of the present application provides a panel, which is prepared by the panel preparation method as described in any one of the third aspects of the present application.

[0051] The fifth technical solution of the present application provides a photovoltaic assembly, including: a panel provided by the fourth technical solution of the present application.

[0052] The sixth aspect of the present application provides a panel for a photovoltaic module, the panel comprising: a visualization panel, the visualization panel comprising a plurality of coating areas and a non-coating area defined by the plurality of coating areas; a coating provided on the coating area, the area of ​​each coating area being greater than or equal to 0.1 mm 2 , and less than or equal to 1mm 2 .

[0053] The panel provided in the present application limits the area of ​​a single coating area. The coating area of ​​the present application has the characteristic of "small volume". In this way, when opaque ink is used, it can ensure that the overall color of the coating is purer. It can also avoid the loss of transmittance, improve the power generation efficiency, and ensure the overall color purity of the photovoltaic.

[0054] In some technical solutions, optionally, the area of ​​the coating area is A1, the area of ​​the non-coating area is A2, and the value of A1 / (A1+A2) is greater than or equal to 0.3 and less than or equal to 0.7.

[0055] In some technical solutions, optionally, the value of A1 / (A1+A2) is greater than or equal to 0.4 and less than or equal to 0.6.

[0056] In these technical solutions, the ratio of the area of ​​the coated area to the total area of ​​the coated and uncoated areas is greater than or equal to 0.4 and less than or equal to 0.6, for example, it can be 0.5. By further limiting the ratio of the coated area, color purity and light transmittance can be guaranteed.

[0057] In some technical solutions, optionally, the area of ​​each coating area is greater than or equal to 0.3 mm2 and less than or equal to 0.7 mm 2 Optionally, the area of ​​each coating zone is equal to 0.5024 mm 2 .

[0058] In these technical solutions, the area of ​​each coating area is much smaller than that of the conventional coating area, which can ensure both transmittance and color. Of course, if the area of ​​each coating area is set to be less than 0.1mm 2 , which will increase the difficulty of preparation, therefore, it is set at 0.3mm2 to 0.7mm 2 The most appropriate between.

[0059] In some technical solutions, optionally, the light transmittance of the coating is less than or equal to 10%.

[0060] In these technical solutions, the coating has a light transmittance of 10% or less, which makes the overall color of the coating purer and less likely to blend with the base color. Alternatively, the coating has a light transmittance of 5% or less, for example, 0%, which further ensures the purity of the overall color of the photovoltaic panel and prevents blending with the base color of the solar panel.

[0061] In some technical solutions, optionally, the coating area includes a plurality of first coating areas spaced apart along the length direction of the visualization board, and a plurality of second coating areas spaced apart along the width direction of the visualization board, the shortest distance between two adjacent first coating areas is greater than or equal to 0.1 mm and less than or equal to 1 mm, and the shortest distance between two adjacent second coating areas is greater than or equal to 0.1 mm and less than or equal to 1 mm.

[0062] In these technical solutions, multiple coating areas can be spaced apart along the length of the visualization board, along the width of the visualization board, or along both the length and width of the visualization board, thereby achieving a more uniform overall color. Furthermore, the shortest distance between two adjacent first coating areas is greater than or equal to 0.1 mm and less than or equal to 1 mm, and the shortest distance between two adjacent second coating areas is greater than or equal to 0.1 mm and less than or equal to 1 mm. This ensures the density of the coating areas and, therefore, the overall color purity.

[0063] In some technical solutions, optionally, the shortest distance between two adjacent first coating areas is greater than or equal to 0.1 mm and less than or equal to 0.3 mm. Optionally, the shortest distance between two adjacent first coating areas is equal to 0.2 mm.

[0064] In some technical solutions, optionally, the shortest distance between two adjacent second coating areas is greater than or equal to 0.1 mm and less than or equal to 0.3 mm. Optionally, the shortest distance between two adjacent second coating areas is equal to 0.2 mm.

[0065] In these technical solutions, by further limiting the distance between adjacent coating areas, the overall color of the coating can be further ensured to be purer. In addition, the loss of light transmittance can be avoided, thereby improving power generation efficiency while ensuring the overall color of the photovoltaic.

[0066] In some technical solutions, optionally, the coating areas are distributed in an array, and the shortest distance between two adjacent coating areas is greater than or equal to 0.1 mm and less than or equal to 0.3 mm.

[0067] In this technical solution, the multiple coating areas can optionally be arranged in an array. That is, the coating areas can be arranged in an array along the length of the visualization board, along the width of the visualization board, or along a predetermined direction. The predetermined direction can form a certain angle with the length direction, for example, greater than or equal to 40 degrees and less than or equal to 50 degrees. For example, it can be 45 degrees. This can provide a certain arrangement pattern for the coating, thereby improving the overall color uniformity.

[0068] In some technical solutions, optionally, the coating area includes one of the following or a combination thereof: a circular coating area, an elliptical coating area, a diamond coating area, and an 8-shaped coating area.

[0069] In these technical solutions, circular coating areas, elliptical coating areas, diamond coating areas and 8-shaped coating areas can be printed better on the one hand, and on the other hand, especially for curved panels, the coating areas of these shapes are not severely deformed compared to the square coating areas, which can ensure the overall color.

[0070] In some technical solutions, optionally, the coating area includes a circular coating area, the diameter of the circular coating area is greater than or equal to 0.5 mm and less than or equal to 1.0 mm, and the distance between the centers of two adjacent circular coating areas is greater than or equal to 0.05 mm and less than or equal to 0.3 mm.

[0071] In these technical solutions, for curved panels, circular coating areas are less deformed than square coating areas. The diameter of the circular coating areas and the distance between the centers of adjacent circular coating areas are also limited. This ensures the overall density of the circular coating areas, thereby ensuring color purity. Optionally, the diameter of the circular coating areas is 0.8 mm or 1.0 mm, and the distance between the centers of adjacent circular coating areas is 0.1 mm or 0.2 mm.

[0072] In some technical solutions, optionally, the panel includes a curved panel, so that it has better power generation efficiency for different incident angles of sunlight.

[0073] In some technical solutions, optionally, the curved panel includes crests and troughs, the crests and troughs are arranged at intervals along the first direction, the coating area is elliptical, and the direction of the short axis of the ellipse is the same as the first direction.

[0074] In these technical solutions, the direction of the minor axis of the ellipse is the same as the first direction, so that under the same volume, the number of elliptical coating areas can be set to be greater, thereby ensuring color purity. Among them, the first direction can also be regarded as the curvature direction of the curved panel.

[0075] In some technical solutions, optionally, the curved panel includes crests and troughs, and the crests and troughs are arranged at intervals along a first direction. The coating area is in the shape of a rhombus, and the rhombus includes a first diagonal line and a second diagonal line. The length of the first diagonal line is greater than the length of the second diagonal line, and the extension direction of the second diagonal line is the same as the first direction.

[0076] In these technical solutions, when the coating area is rhombus-shaped, the extension direction of the shorter diagonal line is the same as the first direction, so that the number of coating areas can be set to be greater under the same volume, thereby ensuring color purity.

[0077] In some technical solutions, optionally, any two coating areas that are closest to each other are staggered.

[0078] In these technical solutions, when the coating area is in the shape of a diamond, any two coating areas that are closest to each other are staggered. In this way, more coating areas can be set in the same volume, thereby ensuring color purity.

[0079] The seventh aspect of the present application provides a method for preparing a panel, which is used to prepare a panel as provided in any embodiment of the sixth aspect of the present application. The method for preparing the panel includes: preparing a coating on the coating area through a silk screen mold; sintering the visualization board of the printed coating to obtain a panel.

[0080] The preparation method of the panel of the present application adjusts the overall silk screen printing to partial silk screen printing, which not only ensures the overall aesthetics of the photovoltaic module panel, but also ensures that the photovoltaic module has a higher power generation power, avoids poor light transmittance, and reduces the loss of power generation efficiency.

[0081] In some technical solutions, optionally, before the step of preparing the coating on the coating area by using a screen mold, the method for preparing the panel further includes treating the visualization plate with an oleophilic treatment agent.

[0082] In this technical solution, the visualization board is first treated with an oleophilic treatment agent, which can improve the bonding strength between the coating and the visualization board after screen printing.

[0083] In some technical solutions, optionally, the lipophilic treatment agent includes at least one of hexamethyldisiloxane, trimethylsiloxane, and dimethylchlorosilane.

[0084] In this technical solution, by selecting an oleophilic treatment agent, the bonding strength between the ink and the visualization board can be further improved, thus avoiding the problem of ink separation.

[0085] In some technical solutions, optionally, during the sintering process, the sintering temperature is greater than or equal to 400° C. and less than or equal to 1000° C. Optionally, the sintering temperature is greater than or equal to 400° C. and less than or equal to 700° C. For example, it can be 500 or 600° C.

[0086] In some technical solutions, optionally, the screen mold is provided with a through hole corresponding to each coating area, and the number of through holes per square inch of the screen mold is greater than or equal to 250 and less than or equal to 300.

[0087] In this embodiment, the number of through holes per square inch of the screen mold is limited to between 250 and 300, which further improves the aesthetics and light transmittance. Optionally, the number of through holes is equal to 250, 270 or 300.

[0088] The eighth technical solution of the present application provides a photovoltaic module, comprising: a panel as provided in any of the technical solutions of the sixth aspect of the present application; or a panel produced by the method for producing a panel as provided in any of the technical solutions of the seventh aspect of the present application. Since the photovoltaic module provided by the present application includes the panel provided in any of the technical solutions of the sixth aspect of the present application, or includes a panel produced by the method for producing a panel as provided in any of the technical solutions of the seventh aspect of the present application, it has all the beneficial effects of the panel provided in any of the technical solutions of the sixth aspect of the present application, and will not be elaborated on here.

[0089] In some technical solutions, optionally, the photovoltaic module further includes a battery layer, which is arranged on one side of the panel, and the coating is arranged between the visualization plate and the battery layer.

[0090] In this embodiment, the coating is arranged between the visualization board and the battery layer, so that the visualization board can provide a certain degree of protection for the coating to prevent the coating from being damaged by external forces and to prevent the coating from being damaged by long-term exposure to the outside.

[0091] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0092] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings.

[0093] in:

[0094] FIG1 shows one structural schematic diagram of a panel according to an embodiment of the present application;

[0095] FIG2 shows a schematic diagram of the assembly structure of the screen mold and the panel according to an embodiment of the present application;

[0096] FIG3 shows one of the structural schematic diagrams of a photovoltaic assembly according to an embodiment of the present application;

[0097] FIG4 shows one of the preparation flow charts of the method for preparing a panel according to an embodiment of the present application;

[0098] FIG5 shows a second schematic structural diagram of a photovoltaic assembly according to an embodiment of the present application;

[0099] FIG6 shows a third structural diagram of a photovoltaic assembly according to an embodiment of the present application;

[0100] FIG7 shows a second structural diagram of a panel according to an embodiment of the present application;

[0101] FIG8 shows a third structural diagram of a panel according to an embodiment of the present application;

[0102] FIG9 shows a fourth structural diagram of a panel according to an embodiment of the present application;

[0103] FIG10 shows a fifth structural diagram of a panel according to an embodiment of the present application;

[0104] FIG11 shows a sixth structural diagram of a panel according to an embodiment of the present application;

[0105] FIG12 is a schematic diagram showing the assembly structure of the screen mold and the panel according to an embodiment of the present application;

[0106] FIG13 shows a second flow chart of the method for preparing a panel according to an embodiment of the present application.

[0107] Among them, the correspondence between the figure marks and component names in Figures 1 to 3 and Figures 5 to 12 is: 1 photovoltaic module, 12 panel, 122 visualization board, 1222 coating area, 12222 first coating area, 12224 second coating area, 1224 non-coating area, 1226 curved surface structure, 124 positioning hole, 14 first adhesive layer, 16 battery layer, 172 crest, 174 trough, 184 first diagonal line, 186 second diagonal line, 18 second adhesive layer, 19 backboard layer, 2 screen mold, 22 mold hole, 24 through hole, 3 scraper, 4 coating. DETAILED DESCRIPTION

[0108] The following describes in detail embodiments of the present application, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0109] The disclosure below provides many different embodiments or examples for realizing different structures of the embodiments of the present application. In order to simplify the disclosure of the embodiments 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. The embodiments of 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 embodiments of the present application provide 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.

[0110] As shown in Figures 1 and 2, the panel 12 provided in the first aspect of the present application is used for a photovoltaic module 1, and the panel 12 includes: a visualization panel 122, the visualization panel 122 includes a coating area 1222 and a non-coating area 1224 defined by the coating area 1222; a coating 4, which is arranged on the coating area 1222.

[0111] The panel 12 provided in the present application includes a visualization board 122, and the visualization board 122 includes a coating area 1222 and a non-coating area 1224 defined by the coating area 1222; the coating 4 is provided on the coating area 1222. The panel 12 of the present application is provided with a coating area 1222 and a non-coating area 1224 on one side of the visualization board 122, and a coating 4 is provided on the coating area 1222. In this way, the overall silk screen is adjusted to a partial silk screen, which not only ensures the overall aesthetics of the panel 12, but also ensures that the photovoltaic module 1 has a higher light transmittance, and thus has a higher power generation power, avoiding poor light transmittance and reducing power generation efficiency loss. Among them, the visualization board 122 of the present application can be a glass plate or other visual board.

[0112] In the above embodiment, optionally, the number of coating areas 1222 is at least two, at least two coating areas 1222 are distributed in an array, the interval between two adjacent coating areas 1222 is 5 mm to 10 mm, and / or the width and length of each coating area 1222 are 2 mm to 5 mm.

[0113] In this embodiment, by limiting the interval between two adjacent coating areas 1222 and the width and length of each coating area 1222, the coating areas 1222 and the non-coating areas 1224 can be arranged alternately, avoiding the problem of the coating areas 1222 being too concentrated or too dispersed, and improving the overall effect.

[0114] In the above embodiment, optionally, the number of coating areas 1222 per square inch of the visualization board 122 is greater than or equal to 10 and less than or equal to 1000.

[0115] In this embodiment, limiting the number of coating areas 1222 per square inch on the visualization board 122 can avoid the problem of the coating areas 1222 being too concentrated or too dispersed, thereby improving the aesthetics and light transmittance.

[0116] In the above embodiment, optionally, the number of coating areas 1222 per square inch of the visualization board 122 is greater than or equal to 150 and less than or equal to 250.

[0117] In this embodiment, the number of coating areas 1222 per square inch of the visualization panel 122 is between 150 and 250, further improving the aesthetics and light transmittance.

[0118] In the above embodiment, optionally, as shown in FIG. 2 , the panel 12 further includes: at least two positioning holes 124 , which are spaced apart on the visualization plate 122 , and the positioning holes 124 extend along the thickness direction of the visualization plate 122 .

[0119] In this embodiment, by setting a positioning hole 124 on the panel 12, the visualization board 122 and the screen mold 2 can be well positioned, the visualization board 122 and the screen mold 2 can fit tightly, and precision printing can be completed continuously on the visualization board 122, which has the advantages of high printing efficiency and strong practicality, and will not cause positional deviation during the printing process.

[0120] In the above embodiment, optionally, the maximum distance between any two points on the coating area 1222 is the first distance, the minimum distance between any two adjacent coating areas 1222 is the second distance, and the ratio of the first distance to the second distance is greater than or equal to 0.5 and less than or equal to 1.5.

[0121] In this embodiment, the length of the coating area 1222 is approximately the same as the spacing between the coating areas 1222, so that the coating areas 1222 and the non-coating areas 1224 are distributed more evenly, and the problem of the coating areas 1222 being too concentrated or too dispersed will not occur, thereby improving the overall effect.

[0122] In the above embodiment, optionally, the coating 4 is transparent pearlescent ink.

[0123] In this embodiment, the coating 4 can be ink, such as transparent pearlescent ink. The ordinary coating 4 is adjusted to transparent pearlescent ink. During the tempering process, the transparent pearlescent ink is not prone to discoloration and distortion due to high temperature. The high-temperature coating 4 can be selected for screen printing to improve printing efficiency.

[0124] In the above embodiment, optionally, the transparent pearlescent ink can absorb light with a wavelength greater than or equal to 100 nm and less than 300 nm, and can transmit light with a wavelength greater than or equal to 300 nm and less than or equal to 1100 nm.

[0125] In this embodiment, the transparent pearlescent ink has good light transmittance and can transmit visible light, part of ultraviolet light and part of near-infrared light. This enables the panel 12 to have good light transmittance and thus have higher power generation capacity, avoiding poor light transmittance and reducing power generation efficiency loss.

[0126] In the above embodiment, optionally, the light transmittance of the panel 12 is greater than or equal to 85%.

[0127] In this embodiment, since the overall silk screen printing is adjusted to alternate silk screen printing in the coating area 1222 and the non-coating area 1224, not only the overall aesthetics of the panel 12 is ensured, the transmittance of the panel 12 is greater than or equal to 85%, ensuring that the photovoltaic module 1 has a higher power generation capacity.

[0128] In the above embodiment, optionally, the thickness of the coating layer 4 is greater than or equal to 20 μm and less than or equal to 30 μm.

[0129] In this embodiment, the thickness of the coating 4 should not be too thick, as too thick a coating 4 will result in poor light transmittance and reduced power generation. The thickness of the coating 4 should not be too thin, as too thin a coating 4 will result in reduced overall aesthetics.

[0130] In the above embodiment, optionally, as shown in FIG3 , the visualization board 122 includes a curved surface structure 1226 , and the radius of the curved surface structure 1226 is greater than or equal to 30 mm and less than or equal to 150 mm.

[0131] In this embodiment, if the arc radius is too large, the peak position will be too flat, which is not conducive to light dispersion. If the arc radius is too small, it will be difficult to manufacture the panel 12. Therefore, setting the radius of the curved structure 1226 between 30 mm and 150 mm can ensure the light dispersion effect and facilitate the manufacture of the panel 12. For example, the radius of the curved structure 1226 is 40 mm, 80 mm, or 120 mm.

[0132] In the above embodiment, optionally, the thickness of the visualization board 122 is greater than or equal to 3 mm and less than or equal to 8 mm.

[0133] In this embodiment, the visualization board 122 should not be too thick. A too thick visualization board 122 will not disperse light properly and increase manufacturing costs. A too thin visualization board 122 will reduce mechanical strength and be easily damaged by external forces. Therefore, the optimal thickness is 3 mm or greater and 8 mm or less, for example, 4 mm, 5 mm, or 6 mm.

[0134] The second embodiment of the present application provides a photovoltaic assembly 1, comprising: a panel 12 provided in any one of the embodiments of the first aspect of the present application.

[0135] Since the photovoltaic assembly 1 provided in the present application includes the panel 12 provided in any one of the embodiments in the first aspect of the present application, it has all the beneficial effects of the panel 12 provided in any one of the embodiments in the first aspect of the present application, which will not be repeated here.

[0136] In some embodiments, optionally, as shown in Figure 3, the photovoltaic module 1 also includes: a backplane layer 19, which is arranged on the side of the panel 12 away from the coating 4; a battery layer 16, which is arranged between the backplane layer 19 and the panel 12; a first adhesive layer 14, which is arranged between the panel 12 and the battery layer 16; and a second adhesive layer 18, which is arranged between the backplane layer 19 and the battery layer 16.

[0137] In this embodiment, the first adhesive layer 14 can be a high-cutoff encapsulation film, preferably one of high-cutoff EVA, POE, EPE or PVB films, with a thickness of 0.5mm-0.8mm; the battery layer 16 is preferably one of XBC, MWT, and shingled batteries without metal grid lines, with positive and negative metal electrodes drawn from the back, followed by a battery cell with grid lines on both the front and back, such as PERC, TOPCON, and HJT. The second adhesive layer 18 can be a highly transparent encapsulation film, preferably one of high-cutoff EVA, POE, EPE or PVB films, with a thickness of 0.5mm-0.8mm; the backplane layer 19 is a flexible polymer material, such as one of PET or CPC or HPC materials, with a thickness of 0.4mm to 0.8mm. The backplane layer 19 of the present application is a flexible polymer material, so it can be bent into different shapes and suitable for different installation substrates. At the same time, the selection of the battery layer 16 can further improve the power generation efficiency.

[0138] As shown in FIG4 , the third aspect of the present application provides a method for preparing a panel, comprising the following steps:

[0139] S102: treating the visualization plate with an oleophilic treatment agent, the visualization plate comprising a coating area and a non-coating area defined by the coating area;

[0140] S104: A coating is prepared on the coating area using a screen mold to obtain a panel.

[0141] The method for preparing the panel of the present application includes first treating the visualization plate 122 with an oleophilic treatment agent to improve the bonding strength between the coating 4 and the visualization plate 122 after screen printing. The visualization plate 122 includes a coating area 1222 and a non-coating area 1224 defined by the coating area 1222. The coating 4 is then prepared on the coating area 1222 using a screen mold 2 to obtain the panel 12. The present application adjusts the overall screen printing to partial screen printing, which not only ensures the overall aesthetics of the panel 12, but also ensures that the photovoltaic module 1 has a higher power generation capacity, avoids poor light transmittance, and reduces power generation efficiency losses.

[0142] In some embodiments, the lipophilic treatment agent optionally includes at least one of hexamethyldisiloxane, trimethylsiloxane, and dimethylchlorosilane.

[0143] In this embodiment, by selecting an oleophilic treatment agent, the bonding strength between the ink and the visualization board 122 can be further improved, thereby avoiding the problem of ink separation.

[0144] In some embodiments, optionally, the screen mold 2 is provided with a through hole corresponding to each coating area 1222 , and the number of through holes per square inch of the screen mold 2 is greater than or equal to 10 and less than or equal to 1000.

[0145] In this embodiment, limiting the number of through holes per square inch on the screen mold 2 can avoid the problem of the coating area 1222 being too concentrated or too dispersed, thereby improving the aesthetics of the panel 12 and the light transmittance.

[0146] In some embodiments, optionally, the number of through holes per square inch of the screen mold 2 is greater than or equal to 150 and less than or equal to 250.

[0147] In this embodiment, the number of through holes per square inch on the screen mold 2 is limited to between 150 and 250, which further improves the aesthetics and light transmittance.

[0148] The fourth aspect of the present application provides a panel 12 , which is prepared by the panel preparation method according to any one of the third aspects of the present application.

[0149] The fifth embodiment of the present application provides a photovoltaic assembly 1, including: a panel 12 provided in the fourth embodiment of the present application.

[0150] As shown in Figures 2 and 3, another embodiment of the present application provides a preparation process for a photovoltaic module 1, which mainly addresses the defects of existing curved panel silk screen printing and can conveniently bend the silk screen mold 2 to obtain the desired curved shape, thereby meeting the precision printing requirements for curved panel products.

[0151] The equipment involved includes:

[0152] The scraper 3 is made of a flexible material. The scraper 3 is made of polyurethane rubber with good wear resistance and resilience. Its hardness is between 60 and 80 Shore A. Its width should be smaller than the width of the screen mold 2.

[0153] Curved panel: Use customized tempered glass with multiple peaks and valleys, with a radius of 30mm to 150mm and a thickness of 3mm to 8mm;

[0154] Screen mold 2: It can be a dot matrix screen mold 2, that is, the printing holes on the screen mold 2 are arranged in the form of a dot matrix, and the curved shape is designed to match the curved panel. The length is slightly longer than the curved panel, and the width is consistent with the curved panel. The material of the dot matrix screen mold 2 can be high-strength low-shrinkage nylon, polyester or polyester fiber material, or stainless steel. The mesh count is selected between 150 mesh and 250 mesh, the dot matrix diameter is 2 mm to 5 mm, and the dot matrix spacing is between 5 mm and 10 mm. The screen mold 2 is positioned by the mold hole 22 and the positioning hole 124 at the upper end of the curved panel;

[0155] Coating 4: Coating 4 can be ink, the ink color is a translucent pearlescent ink in the Pantone color card PANTONE 1645CP or 1625CP, the ink has selective permeability, can selectively absorb ultraviolet light and transmit visible light, and the transmittance T of the panel 12 after screen printing is greater than 85%.

[0156] During the preparation process, the curved panel is first turned over and the inner surface of the curved panel is cleaned. The treatment agent can be one of hexamethyldisiloxane, trimethylsiloxane, and dimethylchlorosilane to enhance the lipophilicity of the inner surface of the curved panel and improve the bonding strength between the ink and the panel 12 after screen printing. After the screen mold 2 is fixed to the curved panel, it is placed in the screen printing machine and the ink is injected into the screen mold 2. The screen printing speed is 20m / min to 30m / min. The ink on the screen mold 2 is evenly scraped with the scraper 3, and the ink thickness is 20μm to 30μm.

[0157] The curved panel after silk screen printing is sintered at a high temperature of 140°C to 150°C and a drying time of 45 minutes to 60 minutes, so that the ink is quickly solidified and formed, and stably bonded to the surface of the panel 12 to obtain the printed curved panel, which serves as the panel 12 of the photovoltaic module 1.

[0158] After curing, the ink layer appears in the form of circular stripes, and the overall shape follows the curved shape of the curved panel. When viewed from close up, it appears in the form of star dots, with bright colors and a translucent effect. When viewed from a distance, the overall color appears to be a consistent bright golden red or brick red.

[0159] After the panel 12 is prepared, the photovoltaic module 1 is prepared using the printed panel 12. The structure of the photovoltaic module 1 includes:

[0160] A curved panel prepared by the above method;

[0161] The first adhesive layer 14 may be a high-cutoff encapsulation adhesive film, for example, one of high-cutoff EVA, POE, EPE or PVB adhesive films, with a thickness of 0.5 mm to 0.8 mm;

[0162] The cell layer 16 may be a cell with no metal grid lines in XBC, MWT, or shingled cells, where the positive and negative metal electrodes are both led out from the back, or a cell with grid lines on both the front and back sides, such as PERC, TOPCON, or HJT.

[0163] The second adhesive layer 18 may be a highly transparent encapsulating film, such as a high-cutoff EVA, POE, EPE or PVB film, with a thickness of 0.5 mm to 0.8 mm;

[0164] The backboard layer 19 may be made of a flexible polymer backboard material, such as PET, CPC or HPC, with a thickness of 0.4 mm to 0.8 mm.

[0165] The photovoltaic module 1 prepared by the method of the present application can selectively screen print the entire inner surface of the curved panel by adjusting the dot diameter size, dot spacing and mesh number of the screen mold 2, thereby improving the overall aesthetics of the curved photovoltaic module 1, ensuring that the curved photovoltaic module 1 has a higher power generation power and reducing the loss of power generation efficiency. Semi-transparent pearlescent ink is selected. Since the ink has selective permeability, it absorbs ultraviolet light and selectively transmits visible light, ensuring that the power generation efficiency loss of the curved screen-printed photovoltaic module 1 is less than 10%, while highlighting the translucent visual effect of the product and the consistency of the overall bright appearance. This solution designs a customized dot matrix screen mold 2, which is tightly fitted to the curved panel through the mold hole 22, and can continuously complete precision printing on the curved panel, with the advantages of high printing efficiency and strong practicality.

[0166] For colored photovoltaics, some current technologies involve directly coating the entire surface of the panel with colored ink. If the colored ink has low light transmittance, this will result in low light transmittance for the entire panel, leading to poor power generation for the battery. If the colored ink has a certain degree of light transmittance, it will easily mix with the base color, causing the overall color of the panel to be impure. Additionally, some documents disclose partial surface coating with colored ink, but typically, the coating area is large. For coatings with low transparency or opaque properties, this will result in low light transmittance for the panel, thus affecting power generation efficiency. Using a translucent coating will also result in impure colors. It can be seen that current photovoltaic panels cannot achieve both color purity and panel transmittance.

[0167] As shown in FIG5 , the panel 12 provided in the sixth aspect of the present application is used for a photovoltaic module 1. The panel 12 includes a visualization plate 122. The visualization plate 122 includes a plurality of coating areas 1222 and a non-coating area 1224 defined by the plurality of coating areas 1222. The coating 4 is provided on the coating area 1222. The area of ​​each coating area 1222 is greater than or equal to 0.1 mm. 2 , and less than or equal to 1mm 2 .

[0168] The panel 12 provided in the present application limits the area of ​​a single coating area 1222. The coating area 1222 of the present application has the characteristic of "small volume". In this way, when the ink is opaque ink, it can ensure that the overall color of the coating 4 is purer. In addition, it can avoid the loss of transmittance, improve the power generation efficiency, and ensure the overall color purity of the photovoltaic.

[0169] Among them, it is necessary to understand that the air side in Figure 5 is the side of the photovoltaic component 1 close to the air, the packaging side is the side of the photovoltaic component 1 facing away from the air, the light-receiving side is the side facing the sunlight, and the backlight side is the side facing away from the sunlight. The corresponding concepts in Figures 6 to 10 are the same.

[0170] In some technical solutions, optionally, the area of ​​the coating region 1222 is A1, the area of ​​the non-coating region 1224 is A2, and the value of A1 / (A1+A2) is greater than or equal to 0.3 and less than or equal to 0.7.

[0171] In some technical solutions, optionally, the value of A1 / (A1+A2) is greater than or equal to 0.4 and less than or equal to 0.6.

[0172] In these technical solutions, the ratio of the area of ​​the coating area 1222 to the total area of ​​the coating area 1222 and the non-coating area 1224 is greater than or equal to 0.4 and less than or equal to 0.6, for example, it can be 0.5. By further limiting the area ratio of the coating area 1222, color purity and light transmittance can be guaranteed.

[0173] In some technical solutions, optionally, the area of ​​each coating region 1222 is greater than or equal to 0.3 mm2 and less than or equal to 0.7 mm2. 2 Optionally, the area of ​​each coating zone 1222 is equal to 0.5024 mm 2 .

[0174] In these technical solutions, the area of ​​each coating area 1222 is much smaller than that of a conventional coating area, so that the transmittance can be guaranteed while also ensuring the color. Of course, if the area of ​​each coating area 1222 is set to be less than 0.1mm 2, which will increase the difficulty of preparation, therefore, it is set at 0.3mm2 to 0.7mm 2 The most appropriate between.

[0175] In some technical solutions, optionally, the light transmittance of the coating 4 is less than or equal to 10%.

[0176] In these technical solutions, the transmittance of coating 4 is less than or equal to 10%, which makes the overall color of coating 4 purer and less likely to blend with the base color. Alternatively, the transmittance of coating 4 is less than or equal to 5%, for example, the transmittance of coating 4 is equal to 0, which can further ensure the purity of the overall photovoltaic color and avoid blending with the base color of the solar panel.

[0177] In some technical solutions, optionally, the components of the coating 4 mainly include: low-melting-point glass powder\resin, a mixed solvent of xylene and butyraldehyde, a high-temperature filler powder and a color powder, and the color powder mainly includes PbCrO4, nano-calcium, fluorescent paste, manganese and cobalt metal compounds.

[0178] In some technical solutions, optionally, as shown in FIG7 , the coating area 1222 includes a plurality of first coating areas 12222 spaced apart along the length direction of the visualization board 122, and a plurality of second coating areas 12224 spaced apart along the width direction of the visualization board 122, wherein the shortest distance between two adjacent first coating areas 12222 is greater than or equal to 0.1 mm and less than or equal to 1 mm, and the shortest distance between two adjacent second coating areas 12224 is greater than or equal to 0.1 mm and less than or equal to 1 mm.

[0179] In these technical solutions, multiple coating areas 1222 can be spaced apart along the length of the visualization board 122, along the width of the visualization board 122, or along both the length and width of the visualization board 122. This can achieve a more uniform overall color. Furthermore, the shortest distance between two adjacent first coating areas 12222 is greater than or equal to 0.1 mm and less than or equal to 1 mm, and the shortest distance between two adjacent second coating areas 12224 is greater than or equal to 0.1 mm and less than or equal to 1 mm. This ensures the density of the coating areas 1222, thereby ensuring overall color purity.

[0180] In some technical solutions, optionally, the shortest distance between two adjacent first coating areas 12222 is greater than or equal to 0.1 mm and less than or equal to 0.3 mm. Optionally, the shortest distance between two adjacent first coating areas 12222 is equal to 0.2 mm.

[0181] In some technical solutions, optionally, the shortest distance between two adjacent second coating areas 12224 is greater than or equal to 0.1 mm and less than or equal to 0.3 mm. Optionally, the shortest distance between two adjacent second coating areas 12224 is equal to 0.2 mm.

[0182] In these technical solutions, by further limiting the distance between adjacent coating areas 1222, the overall color of the coating 4 can be further ensured to be purer. In addition, the loss of light transmittance can be avoided, thereby improving power generation efficiency while ensuring the overall color of the photovoltaic.

[0183] In some technical solutions, optionally, the coating areas 1222 are distributed in an array, and the shortest distance between two adjacent coating areas 1222 is greater than or equal to 0.1 mm and less than or equal to 0.3 mm.

[0184] In this technical solution, the plurality of coating areas 1222 are optionally distributed in an array, that is, the coating areas 1222 can be spaced apart along the length direction of the visualization board 122, can also be spaced apart along the width direction of the visualization board 122, or can also be spaced apart along a predetermined direction. The predetermined direction can form a certain angle with the length direction, for example, greater than or equal to 40 degrees and less than or equal to 50 degrees. For example, it can be 45 degrees. This can provide a certain arrangement pattern for the coating 4, thereby improving the overall color uniformity.

[0185] In some technical solutions, optionally, as shown in FIG7 , FIG8 , FIG9 , FIG10 and FIG11 , the coating area 1222 includes one of the following or a combination thereof: a circular coating area, an elliptical coating area, a diamond coating area and an 8-shaped coating area.

[0186] In these technical solutions, coating areas 1222 such as circular coating areas, elliptical coating areas, diamond coating areas and 8-shaped coating areas can be printed better on the one hand, and on the other hand, especially for curved panels, the coating areas 1222 of these shapes are not severely deformed compared to the square coating areas 1222, so that the overall color can be guaranteed.

[0187] In some technical solutions, optionally, as shown in Figures 7 and 8, the coating area 1222 includes a circular coating area, the diameter of the circular coating area is greater than or equal to 0.5 mm and less than or equal to 1.0 mm, and the distance between the centers of two adjacent circular coating areas is greater than or equal to 0.05 mm and less than or equal to 0.3 mm.

[0188] In these technical solutions, for curved panels, the circular coating areas are less deformed than the square coating areas 1222. The diameter of the circular coating areas and the distance between the centers of adjacent circular coating areas are also limited. This ensures the overall density of the circular coating areas, thereby ensuring color purity. Optionally, the diameter of the circular coating areas is 0.8 mm or 1.0 mm, and the distance between the centers of adjacent circular coating areas is 0.1 mm or 0.2 mm.

[0189] In some technical solutions, optionally, as shown in FIG6 , the panel 12 includes a curved panel, so that it has better power generation efficiency for different incident angles of sunlight.

[0190] In some technical solutions, optionally, as shown in Figure 9, the curved panel includes crests 172 and troughs 174, and the crests 172 and troughs 174 are arranged at intervals along the first direction. The coating area 1222 is elliptical, and the direction of the short axis of the ellipse is the same as the first direction.

[0191] In these technical solutions, the direction of the minor axis of the ellipse is the same as the first direction, so that under the same volume, the number of elliptical coating areas can be set to be greater, thereby ensuring color purity. Among them, the first direction can also be regarded as the curvature direction of the curved panel.

[0192] In some technical solutions, optionally, as shown in Figure 10, the curved panel includes crests 172 and troughs 174, and the crests 172 and troughs 174 are arranged at intervals along the first direction. The coating area 1222 is in the shape of a rhombus, and the rhombus includes a first diagonal line 184 and a second diagonal line 186. The length of the first diagonal line 184 is greater than the length of the second diagonal line 186, and the extension direction of the second diagonal line 186 is the same as the first direction.

[0193] In these technical solutions, when the coating area 1222 is diamond-shaped, the extension direction of the shorter diagonal line is the same as the first direction, so that under the same volume, the number of coating areas 1222 can be set to be greater, thereby ensuring color purity.

[0194] In some technical solutions, optionally, any two coating areas 1222 that are closest to each other are staggered.

[0195] In these technical solutions, when the coating area 1222 is diamond-shaped, any two coating areas 1222 that are closest to each other are staggered. In this way, more coating areas 1222 can be set in the same volume, thereby ensuring color purity.

[0196] As shown in FIG12 and FIG13 , the seventh aspect of the present application provides a method for preparing a panel, which is used to prepare the panel 12 provided in any embodiment of the sixth aspect of the present application. The method for preparing the panel includes:

[0197] S112: preparing a coating on the coating area through a screen die;

[0198] S114: Sintering the visualization board with the printed coating to obtain a panel.

[0199] The preparation method of the panel of the present application adjusts the overall silk screen printing to partial silk screen printing, which not only ensures the overall aesthetics of the panel 12 of the photovoltaic module 1, but also ensures that the photovoltaic module 1 has a higher power generation power, avoids poor light transmittance, and reduces the loss of power generation efficiency.

[0200] Optionally, as shown in Figure 12, during the printing process of the coating 4, the screen mold 2 is positioned through the mold hole 22 and the positioning hole 124 at the upper end of the panel 12, and ink is injected into the screen mold 2. The screen printing speed is 20m / min to 30m / min, and the ink on the screen mold 2 is evenly scraped by the scraper 3, and the ink thickness is 20μm to 30μm.

[0201] In some technical solutions, optionally, before the step of preparing the coating on the coating area by using a screen mold, the method for preparing the panel further includes treating the visualization plate with an oleophilic treatment agent.

[0202] In this technical solution, the visualization plate 122 is first treated with an oleophilic treatment agent, which can improve the bonding strength between the coating 4 and the visualization plate 122 after screen printing.

[0203] In some technical solutions, optionally, the lipophilic treatment agent includes at least one of hexamethyldisiloxane, trimethylsiloxane, and dimethylchlorosilane.

[0204] In this technical solution, by selecting a lipophilic treatment agent, the bonding strength between the ink and the visualization board 122 can be further improved, thus avoiding the problem of ink separation.

[0205] In some technical solutions, optionally, during the sintering process, the sintering temperature is greater than or equal to 400° C. and less than or equal to 1000° C. Optionally, the sintering temperature is greater than or equal to 400° C. and less than or equal to 700° C. For example, it can be 500° C. or 600° C.

[0206] In some technical solutions, optionally, the screen mold 2 is provided with a through hole 24 corresponding to each coating area 1222 , and the number of the through holes 24 per square inch of the screen mold 2 is greater than or equal to 250 and less than or equal to 300.

[0207] In this embodiment, the number of through holes 24 per square inch of the screen mold 2 is between 250 and 300, which further improves the aesthetics and light transmittance. Optionally, the number of through holes 24 is equal to 250, 270 or 300.

[0208] As shown in FIG5 , the eighth technical solution of the present application provides a photovoltaic module 1, comprising: a panel 12 as provided in any of the technical solutions of the sixth aspect of the present application; or a panel 12 produced by the panel production method provided in any of the technical solutions of the seventh aspect of the present application. Since the photovoltaic module 1 provided in the present application includes the panel 12 provided in any of the technical solutions of the sixth aspect of the present application, or includes the panel 12 produced by the panel production method provided in any of the technical solutions of the seventh aspect of the present application, it has all the beneficial effects of the panel 12 provided in any of the technical solutions of the sixth aspect of the present application, and will not be elaborated here.

[0209] In some technical solutions, optionally, the photovoltaic assembly 1 further includes a battery layer 16 , which is disposed on one side of the panel 12 , and the coating 4 is disposed between the visualization plate 122 and the battery layer 16 .

[0210] In this embodiment, the coating 4 is arranged between the visualization board 122 and the battery layer 16, so that the visualization board 122 can provide a certain degree of protection for the coating 4 to prevent the coating 4 from being damaged by external forces, and also to prevent the coating 4 from being damaged by long-term exposure to the outside.

[0211] Another embodiment of the present application provides a silk screen printing process for a photovoltaic module 1, wherein ink is first attached to a glass substrate (i.e., the visualization board 122 of the present application) by silk screen printing. The ink used is a high-temperature resistant special ink, and then the ink is adhered to the glass substrate by high-temperature sintering. The temperature resistance range of the special ink is 400°C to 1000°C, which can ensure good performance even at high temperatures. The coating 4 is located on the inner side of the photovoltaic product, that is, between the visualization board 122 and the battery layer 16. The mesh number of the silk screen mold 2 is 250-300 mesh (it can be 300 mesh, so that the screen is dense and the substrate is thin, and the silk screen ink is not easy to diffuse outward after the silk screen printing is completed). The ink transmittance is less than 10%. Optionally, the ink is an opaque ink, so that the color will be more positive. The high-temperature ink composition can be: low-melting point glass powder\resin, a mixed solvent of xylene and butyraldehyde, high-temperature filler powder and toner. The toner is mainly PbCrO4, nano-calcium, fluorescent paste, manganese and cobalt metal compounds. The silk screen pattern is a dot array, and the area of ​​a single dot is 0.5mm 2 ±0.2mm 2 , for example, it can be 0.5024mm 2 The silk-screen pattern area accounts for 50%±10%, and the rest is non-silk-screen area to ensure sufficient light transmittance uniformity. This solution is also applicable to curved photovoltaics.

[0212] As shown in FIG8 , each coating area 1222 may be dot-shaped, with a diameter φ1 between 0.5 mm and 1.0 mm (can be 0.8 mm), and the left and right distance W1 and the top and bottom distance H1 of the dot are both between 0.05 mm and 0.3 mm (can be 0.2 mm) to ensure the area ratio.

[0213] As shown in Figure 9, each coating area 1222 can be elliptical, with a diameter of φ2 less than φ3, and the minor axis of the ellipse aligned with the curvature of the glass, similarly ensuring area occupancy. Along the length of the visualization plate 122, the spacing W2 between two adjacent coating areas 1222 is between 0.05 mm and 0.3 mm, for example, 0.2 mm. Along the width of the visualization plate 122, the spacing H2 between two adjacent coating areas 1222 is between 0.05 mm and 0.3 mm, for example, 0.2 mm.

[0214] In addition, each coating area 1222 can be diamond-shaped or figure-8-shaped, as shown in Figures 10 and 11. When the coating area 1222 is diamond-shaped, W3 < W4, and W3 is arranged along the bending direction of the glass. The coating area 1222 is staggered to ensure that the spacing X1 between the two staggered coating areas 1222 is between 0.05 mm and 0.3 mm, for example, 0.2 mm, to ensure the area ratio. Along the width direction of the visualization board 122, the spacing H3 between two adjacent coating areas 1222 is between 0.05 mm and 0.3 mm.

[0215] The panel 12 of this embodiment evenly distributes tiny dots of ink, so that each PN node (where P stands for P type, i.e. positive type, and N stands for N type, i.e. negative type) of the photovoltaic cell can be effectively activated, making hot spot effects less likely to occur, thereby ensuring consistency in appearance and maximizing power.

[0216] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that specific features, structures, materials, or characteristics described in conjunction with an embodiment or example are included in at least one embodiment or example of the present application. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0217] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and intent of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A panel, wherein For a photovoltaic module, the panel comprises: a visualization plate comprising a coating area and a non-coating area defined by the coating area; The coating is arranged on the coating area. The number of the coating areas is at least two, and the at least two coating areas are distributed in an array.

2. The panel according to claim 1, wherein The interval between two adjacent coating areas is 5 mm to 10 mm, and / or the width and length of each coating area are 2 mm to 5 mm.

3. The panel according to claim 1 or 2, wherein: The number of the coating areas per square inch of the visualization board is greater than or equal to 10 and less than or equal to 1000.

4. The panel according to claim 3, wherein The number of the coating areas per square inch of the visualization board is greater than or equal to 150 and less than or equal to 250.

5. The panel according to any one of claims 1 to 4, wherein Also includes: At least two positioning holes are arranged at intervals on the visualization plate, and the positioning holes extend along the thickness direction of the visualization plate.

6. The panel according to any one of claims 1 to 5, wherein The maximum distance between any two points on the coating area is a first distance, the minimum distance between any two adjacent coating areas is a second distance, and the ratio of the first distance to the second distance is greater than or equal to 0.5 and less than or equal to 1.

5.

7. The panel according to any one of claims 1 to 6, wherein The coating is transparent pearlescent ink.

8. The panel according to claim 7, wherein The transparent pearlescent ink can absorb light with a wavelength greater than or equal to 100 nm and less than 300 nm, and can transmit light with a wavelength greater than or equal to 300 nm and less than or equal to 1100 nm.

9. The panel according to any one of claims 1 to 6, wherein The light transmittance of the panel is greater than or equal to 85%.

10. The panel according to any one of claims 1 to 6, wherein The thickness of the coating is greater than or equal to 20 μm and less than or equal to 30 μm.

11. The panel according to any one of claims 1 to 6, wherein The visualization board includes a curved surface structure, the radius of the curved surface structure is greater than or equal to 30 mm and less than or equal to 150 mm, and / or The thickness of the visualization board is greater than or equal to 3 mm and less than or equal to 8 mm.

12. A photovoltaic module, wherein: include: The panel according to any one of claims 1 to 11.

13. The photovoltaic module according to claim 12, wherein: Also includes: a backing layer, arranged on a side of the panel away from the coating; a battery layer, the battery layer being disposed between the back plate layer and the panel; a first adhesive layer, disposed between the panel and the battery layer; The second adhesive layer is arranged between the back plate layer and the battery layer.

14. A method for preparing a panel, wherein: include: treating a visualization plate with an oleophilic treatment agent, the visualization plate comprising a coating area and a non-coating area defined by the coating area; A coating is prepared on the coating area by a wire mesh die to obtain the panel.

15. The method for preparing a panel according to claim 14, wherein: The lipophilic treatment agent includes at least one of hexamethyldisiloxane, trimethylsiloxane, and dimethylchlorosilane.

16. The method for preparing a panel according to claim 14 or 15, wherein: The screen mold is provided with a through hole corresponding to each coating area, and the number of the through holes per square inch of the screen mold is greater than or equal to 10 and less than or equal to 1000.

17. The method for preparing a panel according to claim 16, wherein: The number of through holes per square inch of the screen mold is greater than or equal to 150 and less than or equal to 250.

18. A panel, wherein For a photovoltaic module, the panel comprises: A visualization board comprising a plurality of coating areas and a non-coating area defined by the plurality of coating areas; The coating is provided on the coating area, and the area of ​​each coating area is greater than or equal to 0.1mm 2 , and less than or equal to 1mm 2 .

19. The panel according to claim 18, wherein The area of ​​the coating area is A1, the area of ​​the non-coating area is A2, and the value of A1 / (A1+A2) is greater than or equal to 0.3 and less than or equal to 0.

7.

20. The panel according to claim 19, wherein The value of A1 / (A1+A2) is greater than or equal to 0.4 and less than or equal to 0.

6.

21. The panel according to claim 18, wherein The area of ​​each coating area is greater than or equal to 0.3mm 2 , and less than or equal to 0.7mm2; and / or The light transmittance of the coating is less than or equal to 10%.

22. The panel according to claim 18, wherein The coating area includes a plurality of first coating areas spaced apart along the length direction of the visualization board, and a plurality of second coating areas spaced apart along the width direction of the visualization board. The shortest distance between two adjacent first coating areas is greater than or equal to 0.1 mm and less than or equal to 1 mm, and the shortest distance between two adjacent second coating areas is greater than or equal to 0.1 mm and less than or equal to 1 mm.

23. The panel according to claim 18, wherein The coating areas are distributed in an array, and the shortest distance between two adjacent coating areas is greater than or equal to 0.1 mm and less than or equal to 0.3 mm.

24. A panel according to any one of claims 18 to 23, wherein The coating area includes one of the following or a combination thereof: a circular coating area, an elliptical coating area, a diamond coating area and an 8-shaped coating area.

25. The panel according to claim 18, wherein The coating area includes a circular coating area, the diameter of the circular coating area is greater than or equal to 0.5 mm and less than or equal to 1.0 mm, and the distance between the centers of two adjacent circular coating areas is greater than or equal to 0.05 mm and less than or equal to 0.3 mm.

26. A panel according to any one of claims 18 to 25, wherein The panel includes a curved panel.

27. The panel according to claim 26, wherein The curved panel includes crests and troughs, and the crests and troughs are arranged at intervals along a first direction. The coating area is elliptical, and the direction of the short axis of the ellipse is the same as the first direction.

28. The panel according to claim 26, wherein The curved panel includes crests and troughs, and the crests and troughs are arranged at intervals along a first direction. The coating area is in the shape of a rhombus, and the rhombus includes a first diagonal line and a second diagonal line. The length of the first diagonal line is greater than the length of the second diagonal line, and the extension direction of the second diagonal line is the same as the first direction.

29. The panel according to claim 28, wherein Any two coating areas that are closest to each other are staggered.

30. A method for preparing a panel, wherein: For preparing the panel according to any one of claims 18 to 29, the method for preparing the panel comprises: preparing the coating on the coating area by a screen die; The visualization board printed with the coating is sintered to obtain the panel.

31. The method for preparing a panel according to claim 30, wherein: During the sintering process, the sintering temperature is greater than or equal to 400° C. and less than or equal to 1000° C.; and / or The screen mold is provided with a through hole corresponding to each coating area, and the number of the through holes per square inch of the screen mold is greater than or equal to 250 and less than or equal to 300.

32. A photovoltaic module, wherein: include: The panel according to any one of claims 18 to 29; or A panel prepared by the method for preparing a panel according to claim 30 or 31.

33. The photovoltaic module according to claim 32, wherein: It also includes: a battery layer, which is arranged on one side of the panel, and the coating is arranged between the visualization plate and the battery layer.

Images