Panel and method for its production and photovoltaic module

Abstract

This invention provides a panel, its fabrication method, and a photovoltaic module, relating to the field of photovoltaic technology, and aims to solve the problems of impure color and low luminous efficiency in existing photovoltaic systems. The panel includes a visualization panel, which comprises multiple coated areas and uncoated areas defined by the coated areas; coatings are applied to the coated areas, and the area of ​​each coated area is greater than or equal to 0.1 mm². 2 and less than or equal to 1mm 2 The area of ​​the coated region is A1, and the area of ​​the uncoated region is A2. The value of A1 / (A1+A2) is greater than or equal to 0.3 and less than or equal to 0.7. The panel provided in this application, by limiting the area of ​​a single coated region and the proportion of the coated region's area, exhibits a "small volume" characteristic in its coated region. This ensures a purer overall color of the coating when using opaque ink, while also preventing light transmittance loss and improving power generation efficiency.

Description

Technical Field

[0001] This invention relates to the field of photovoltaic technology, and more specifically, to a panel, a method for preparing the same, and a photovoltaic module. Background Technology

[0002] For colored photovoltaics, some current technologies involve directly coating the entire surface of the panel with colored ink. However, if the colored ink has low light transmittance, the overall light transmittance of the panel will be low, resulting in poor power generation. Conversely, if the colored ink has a certain degree of light transmittance, it easily mixes with the base color, leading to impure overall color on the panel. Furthermore, while some documents disclose partial surface coating with colored ink, the coated area is typically quite large. For coatings with low transparency or no transparency, this results in low light transmittance, affecting power generation efficiency. On the other hand, using a semi-transparent coating leads to impure color. Therefore, current photovoltaic panels cannot simultaneously achieve both color purity and high light transmittance. Summary of the Invention

[0003] The present invention addresses the problems of impure colors and low luminous efficiency in existing photovoltaic systems.

[0004] A first aspect of the present invention is to provide a panel.

[0005] A second aspect of the present invention is to provide a method for preparing a panel.

[0006] A third aspect of the present invention is to provide a photovoltaic module.

[0007] The first aspect of the present invention provides a panel for a photovoltaic module. The panel includes: a visualization panel, which includes a plurality of coated areas and an uncoated area defined by the plurality of coated areas; and a coating disposed on the coated areas, wherein the area of ​​each coated area is greater than or equal to 0.1 mm2 and less than or equal to 1 mm2.

[0008] The panel provided in this application has a "small volume" feature in its coating area by limiting the area of ​​a single coating region. This ensures that the overall color of the coating is purer when using opaque ink, while also avoiding the loss of light transmittance. This improves power generation efficiency while ensuring the overall color purity of the photovoltaic system.

[0009] In some technical solutions, optionally, the area of ​​the coated area is A1, the area of ​​the uncoated 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.

[0010] 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.

[0011] In these technical solutions, the ratio of the area of ​​the coated region to the total area of ​​the coated and uncoated regions 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 proportion of the coated region area, the purity of the color can be guaranteed, as well as the light transmittance.

[0012] In some technical solutions, optionally, the area of ​​each coated region is greater than or equal to 0.3 mm. 2 And less than or equal to 0.7 mm2. Optionally, the area of ​​each coated area is equal to 0.5024 mm2.

[0013] In these technical solutions, the area of ​​each coating region is much smaller than that of a conventional coating region. This ensures both light transmittance and color accuracy. However, setting the area of ​​each coating region to less than 0.1 mm² would increase the manufacturing difficulty; therefore, it is set at 0.3 mm². 2 The ideal range is between 0.7 mm² and 0.7 mm².

[0014] In some technical solutions, optionally, the light transmittance of the coating is less than or equal to 10%.

[0015] In these technical solutions, the light transmittance of the coating is less than or equal to 10%, which makes the overall color of the coating purer and less likely to mix with the base color. Optionally, the light transmittance of the coating is less than or equal to 5%, for example, the light transmittance of the coating is equal to 0, which can further ensure the purity of the overall color of the photovoltaic and avoid mixing with the base color of the solar panel.

[0016] In some technical solutions, the coating area may optionally include a plurality of first coating areas spaced apart along the length of the visualization board and a plurality of second coating areas spaced apart along the width of the visualization board, wherein 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.

[0017] In these technical solutions, multiple coating zones can be spaced apart along the length of the visualization board, along the width of the visualization board, or simultaneously along both the length and width directions of the visualization board, thus making the overall color more uniform. Furthermore, the shortest distance between two adjacent first coating zones 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 zones is greater than or equal to 0.1 mm and less than or equal to 1 mm, ensuring the density of the coating zones and thus guaranteeing the overall color purity.

[0018] 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.

[0019] 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.

[0020] In these technical solutions, by further limiting the distance between adjacent coating areas, it is possible to further ensure that the overall color of the coating is purer, and also to avoid the loss of light transmittance, thereby improving power generation efficiency while ensuring the overall color of the photovoltaic system.

[0021] In some technical solutions, the coating areas are optionally distributed in an array, with the shortest distance between two adjacent coating areas being greater than or equal to 0.1 mm and less than or equal to 0.3 mm.

[0022] In this technical solution, optionally, multiple coating areas are arranged in an array. That is, the coating areas can be arranged in an array along the length direction of the visualization board, along the width direction of the visualization board, or along a preset direction. The preset direction can form a certain angle with the length direction, for example, greater than or equal to 40° and less than or equal to 50°. For example, it can be 45°. This allows the coating to have a certain arrangement pattern, thereby improving the uniformity of the overall color.

[0023] In some technical solutions, the coating area may optionally include one or a combination of the following: a circular coating area, an elliptical coating area, a diamond-shaped coating area, and a figure-eight-shaped coating area.

[0024] In these technical solutions, coating areas such as circular, elliptical, diamond, and figure-eight shaped coating areas can be printed better. In addition, especially for curved panels, these shaped coating areas do not deform as much as square coating areas, thus ensuring the overall color.

[0025] In some technical solutions, optionally, the coating area includes a circular coating area with a diameter 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.

[0026] In these technical solutions, for curved panels, the circular coating area exhibits less deformation compared to the square coating area. Furthermore, by limiting the diameter of the circular coating area and the distance between the centers of two adjacent circular coating areas, the overall density of the circular coating area can be maintained, thereby ensuring color purity. Optionally, the diameter of the circular coating area is equal to 0.8 mm or 1.0 mm, and the distance between the centers of two adjacent circular coating areas is equal to 0.1 mm or 0.2 mm.

[0027] In some technical solutions, the panel may optionally include a curved panel, which provides good power generation efficiency for different angles of sunlight incidence.

[0028] In some technical solutions, optionally, the curved panel includes crests and troughs, which are arranged at intervals along a first direction, and the coating area is elliptical in shape, with the minor axis of the ellipse in the same direction as the first direction.

[0029] In these technical solutions, the direction of the minor axis of the ellipse is the same as the first direction. This allows for a greater number of elliptical coating areas within the same volume, thus ensuring color purity. The first direction can also be considered as the bending direction of the curved panel.

[0030] In some technical solutions, optionally, the curved panel includes crests and troughs, which are arranged at intervals along a first direction. The coating area is rhomboid in shape, which includes a first diagonal and a second diagonal. The length of the first diagonal is greater than the length of the second diagonal, and the extension direction of the second diagonal is the same as that of the first direction.

[0031] In these technical solutions, when the shape of the coating area is rhomboid, the extension direction of the shorter diagonal is the same as the first direction. In this way, the number of coating areas can be set more in the same volume, thereby ensuring color purity.

[0032] In some technical solutions, the two coating areas that are closest to each other can be offset.

[0033] In these technical solutions, when the shape of the coating area is rhomboid, the 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.

[0034] The second aspect of the present invention provides a method for preparing a panel, which is used to prepare a panel as provided in any embodiment of the first aspect of the present invention. The method for preparing the panel includes: preparing a coating on a coating area by using a screen printing mold; and sintering a visual plate of the printed coating to obtain the panel.

[0035] The panel manufacturing method of the present invention adjusts the overall screen printing to partial screen printing, which not only ensures the overall aesthetics of the photovoltaic module panel, but also ensures that the photovoltaic module has high power generation capacity, avoids poor light transmittance, and reduces power generation efficiency loss.

[0036] In some technical solutions, optionally, before the step of preparing the coating on the coating area by screen printing, the panel preparation method further includes treating the visualization panel with an oleophilic treatment agent.

[0037] In this technical solution, the visualization board is first treated with an oleophilic treatment agent, which can improve the bonding strength between the screen-printed coating and the visualization board.

[0038] In some technical solutions, the lipophilic treatment agent optionally includes at least one of hexamethyldisiloxane, trimethylsiloxane, and dimethylchlorosilane.

[0039] 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 detachment.

[0040] In some technical solutions, optionally, during the sintering process, the sintering temperature is greater than or equal to 400℃ and less than or equal to 1000℃. Alternatively, the sintering temperature is greater than or equal to 400℃ and less than or equal to 700℃. For example, it could be 500 or 600℃.

[0041] In some technical solutions, optionally, the screen stencil is provided with through holes for each coating area, and the number of through holes on the screen stencil is greater than or equal to 250 and less than or equal to 300 per square inch.

[0042] In this embodiment, the number of through-holes per square inch of the screen die is limited to between 250 and 300, further improving aesthetics and light transmittance. Optionally, the number of through-holes is equal to 250, 270, or 300.

[0043] A third aspect of the present invention provides a photovoltaic module, comprising: a panel as provided in any of the first aspects of the present invention; or a panel prepared by a method for preparing a panel as provided in any of the second aspects of the present invention. Since the photovoltaic module provided by the present invention includes a panel as provided in any of the first aspects of the present invention, or includes a panel prepared by a method for preparing a panel as provided in any of the second aspects of the present invention, it possesses all the beneficial effects of the panel as provided in any of the first aspects of the present invention, which will not be elaborated further here.

[0044] In some technical solutions, the photovoltaic module may optionally include a battery layer disposed on one side of the panel, with a coating disposed between the visualization panel and the battery layer.

[0045] In this embodiment, the coating is disposed between the visualization panel and the battery layer. This allows the visualization panel to provide some protection for the coating, preventing it from being damaged by external forces and also avoiding the problem of the coating being damaged due to long-term exposure to the outside.

[0046] Additional aspects and advantages of the invention will become apparent in the following description or may be learned by practice of the invention. Attached Figure Description

[0047] The above and / or additional aspects and advantages of embodiments of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, wherein:

[0048] Figure 1 One of the structural schematic diagrams of a photovoltaic module according to an embodiment of the present invention is shown;

[0049] Figure 2 A second schematic diagram of the structure of a photovoltaic module according to an embodiment of the present invention is shown;

[0050] Figure 3 One of the structural schematic diagrams of the panel according to an embodiment of the present invention is shown;

[0051] Figure 4 A second schematic diagram of the panel structure according to an embodiment of the present invention is shown;

[0052] Figure 5 The third schematic diagram of the panel structure according to an embodiment of the present invention is shown;

[0053] Figure 6 The fourth schematic diagram of the panel structure according to an embodiment of the present invention is shown;

[0054] Figure 7 The fifth schematic diagram of the panel structure according to an embodiment of the present invention is shown;

[0055] Figure 8 A schematic diagram of the assembly structure of the screen mold and the panel according to an embodiment of the present invention is shown;

[0056] Figure 9 A flowchart illustrating the preparation method of the panel according to an embodiment of the present invention is shown.

[0057] in, Figures 1 to 8 The correspondence between the reference numerals and the component names in the attached drawings is as follows:

[0058] 1. Photovoltaic module, 12. Panel, 122. Visualization panel, 1222. Coated area, 12222. First coated area, 12224. Second coated area, 1224. Uncoated area, 124. Positioning holes, 16. Cell layer, 172. Peak, 174. Valley, 184. First diagonal, 186. Second diagonal, 2. Screen printing mold, 22. Mold holes, 3. Scraper, 24. Through holes, 4. Coating. Detailed Implementation

[0059] To better understand the above aspects, features, and advantages of the embodiments of the present invention, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0060] Numerous specific details are set forth in the following description in order to provide a full understanding of embodiments of the invention. However, embodiments of the invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of embodiments of the invention is not limited to the specific embodiments disclosed below.

[0061] like Figure 1 As shown, the panel 12 provided by the first aspect of the present invention is used for a photovoltaic module 1. The panel 12 includes a visualization plate 122, which includes a plurality of coated areas 1222 and an uncoated area 1224 defined by the plurality of coated areas 1222. A coating 4 is disposed on the coated areas 1222, and the area of ​​each coated area 1222 is greater than or equal to 0.1 mm2 and less than or equal to 1 mm2.

[0062] The panel 12 provided in this application has a "small volume" feature in its coating area 1222 by limiting the area of ​​a single coating area 1222. In this way, when using opaque ink, it can ensure that the overall color of the coating 4 is purer, and also avoid the loss of light transmittance, thereby improving power generation efficiency while ensuring the overall color purity of the photovoltaic.

[0063] Among these, it is necessary to understand that Figure 1 The air-facing side is the side of photovoltaic module 1 closest to the air, the encapsulation side is the side of photovoltaic module 1 away from the air, the light-receiving side is the side facing the sunlight, and the back-lighting side is the side away from the sunlight. Figures 2 to 6 The corresponding concepts in [the text] are similar.

[0064] In some technical solutions, optionally, the area of ​​the coated area 1222 is A1, the area of ​​the uncoated area 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.

[0065] 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.

[0066] In these technical solutions, the ratio of the area of ​​the coated area 1222 to the total area of ​​the coated area 1222 and the uncoated 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 proportion of the area of ​​the coated area 1222, the purity of the color can be guaranteed, and the light transmittance can also be guaranteed.

[0067] In some technical solutions, optionally, the area of ​​each coating region 1222 is greater than or equal to 0.3 mm². 2 And less than or equal to 0.7 mm2. Optionally, the area of ​​each coating area 1222 is equal to 0.5024 mm2.

[0068] In these technical solutions, the area of ​​each coating region 1222 is much smaller than that of a conventional coating region. This ensures both light transmittance and color accuracy. However, setting the area of ​​each coating region 1222 to less than 0.1 mm² would increase the manufacturing difficulty; therefore, it is set at 0.3 mm². 2 The ideal range is between 0.7 mm² and 0.7 mm².

[0069] In some technical solutions, the transmittance of coating 4 is optionally less than or equal to 10%.

[0070] In these technical solutions, the light transmittance of coating 4 is less than or equal to 10%, which makes the overall color of coating 4 purer and less likely to mix with the base color. Optionally, the light transmittance of coating 4 is less than or equal to 5%, for example, the light transmittance of coating 4 is equal to 0, which can further ensure the purity of the overall color of the photovoltaic and avoid mixing with the base color of the solar panel.

[0071] In some technical solutions, the components of coating 4 may optionally include: low melting point glass powder / resin, xylene and butyraldehyde mixed solvent, high temperature filler powder and color powder, the color powder mainly being PbCrO4, nano-calcium, fluorescent paste, manganese and cobalt metal compounds.

[0072] In some technical solutions, optionally, such as Figure 3 As shown, the coating area 1222 includes a plurality of first coating areas 12222 spaced apart along the length of the visualization plate 122, and a plurality of second coating areas 12224 spaced apart along the width of the visualization plate 122. 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.

[0073] In these technical solutions, multiple coating areas 1222 can be spaced apart along the length of the visualization panel 122, spaced apart along the width of the visualization panel 122, or simultaneously along both the length and width of the visualization panel 122. This makes the overall color more uniform. 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 guaranteeing the overall color purity.

[0074] 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.

[0075] 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.

[0076] In these technical solutions, by further limiting the distance between adjacent coating areas 1222, the overall color of coating 4 can be further ensured to be purer. In addition, the loss of light transmittance can be avoided, and the power generation efficiency can be improved while ensuring the overall color of photovoltaic.

[0077] In some technical solutions, the coating areas 1222 are optionally 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.

[0078] In this technical solution, optionally, multiple coating areas 1222 are arranged in an array. That is, the coating areas 1222 can be spaced apart along the length direction of the visualization board 122, spaced apart along the width direction of the visualization board 122, and spaced apart along a preset direction. The preset direction can form a certain angle with the length direction, for example, greater than or equal to 40° and less than or equal to 50°. For example, it can be 45°. This allows the coating 4 to have a certain arrangement pattern, thereby improving the uniformity of the overall color.

[0079] In some technical solutions, optionally, such as Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, coating area 1222 includes one or a combination of the following: circular coating area, elliptical coating area, diamond-shaped coating area and figure-eight shaped coating area.

[0080] In these technical solutions, coating areas 1222 such as circular coating areas, elliptical coating areas, diamond-shaped coating areas and figure-eight-shaped coating areas can be printed better. On the other hand, especially for curved panels, these shaped coating areas 1222 do not deform as much as square coating areas 1222, thus ensuring the overall color.

[0081] In some technical solutions, optionally, such as Figure 3 and Figure 4 As shown, the coating area 1222 includes a circular coating area with a diameter greater than or equal to 0.5 mm and less than or equal to 1.0 mm. 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.

[0082] In these technical solutions, for curved panels, the circular coating area exhibits less deformation compared to the square coating area 1222. Furthermore, by limiting the diameter of the circular coating area and the distance between the centers of two adjacent circular coating areas, the overall density of the circular coating area can be maintained, thereby ensuring color purity. Optionally, the diameter of the circular coating area is 0.8 mm or 1.0 mm, and the distance between the centers of two adjacent circular coating areas is 0.1 mm or 0.2 mm.

[0083] In some technical solutions, optionally, such as Figure 2 As shown, panel 12 includes a curved panel, which provides good power generation efficiency for different angles of sunlight incidence.

[0084] In some technical solutions, optionally, such as Figure 5 As shown, the curved panel includes peaks 172 and troughs 174, which are arranged at intervals along a first direction. The coating area 1222 is elliptical in shape, and the direction of the minor axis of the ellipse is the same as the first direction.

[0085] In these technical solutions, the direction of the minor axis of the ellipse is the same as the first direction. This allows for a greater number of elliptical coating areas within the same volume, thus ensuring color purity. The first direction can also be considered as the bending direction of the curved panel.

[0086] In some technical solutions, optionally, such as Figure 6 As shown, the curved panel includes crests 172 and troughs 174, which are arranged at intervals along a first direction. The coating area 1222 is rhomboid in shape, which includes a first diagonal 184 and a second diagonal 186. The length of the first diagonal 184 is greater than the length of the second diagonal 186, and the extension direction of the second diagonal 186 is the same as that of the first direction.

[0087] In these technical solutions, when the shape of the coating area 1222 is rhomboid, the extension direction of the shorter diagonal is the same as the first direction. In this way, the number of coating areas 1222 can be set more in the same volume, thereby ensuring color purity.

[0088] In some technical solutions, the two closest coating areas 1222 can be optionally staggered.

[0089] In these technical solutions, when the shape of the coating area 1222 is rhomboid, any two coating areas 1222 that are closest to each other are staggered. In this way, the number of coating areas 1222 can be set more in the same volume, thereby ensuring color purity.

[0090] like Figure 8 and Figure 9As shown, a second aspect of the present invention provides a method for preparing a panel, used to prepare a panel 12 as provided in any embodiment of the first aspect of the present invention. The method for preparing the panel includes:

[0091] S102: A coating is prepared on the coating area using a screen printing mold;

[0092] S104: The printed coating visualization board is sintered to obtain the panel.

[0093] The panel preparation method of the present invention adjusts the overall screen printing to partial 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 high power generation capacity, avoids poor light transmittance, and reduces power generation efficiency loss.

[0094] Optionally, such as Figure 8 As shown, during the printing process of coating 4, the screen mold 2 is positioned with the positioning hole 124 at the upper end of the panel 12 through the mold hole 22, and 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 coated by the push of the squeegee 3, and the ink thickness is 20μm to 30μm.

[0095] In some technical solutions, optionally, before the step of preparing the coating on the coating area by screen printing, the panel preparation method further includes treating the visualization panel with an oleophilic treatment agent.

[0096] In this technical solution, the visualization plate 122 is first treated with an oleophilic treatment agent, which can improve the bonding strength between the screen-printed coating 4 and the visualization plate 122.

[0097] In some technical solutions, the lipophilic treatment agent optionally includes at least one of hexamethyldisiloxane, trimethylsiloxane, and dimethylchlorosilane.

[0098] In this technical solution, by selecting an oleophilic treatment agent, the bonding strength between the ink and the visualization plate 122 can be further improved, thus avoiding the problem of ink detachment.

[0099] In some technical solutions, optionally, during the sintering process, the sintering temperature is greater than or equal to 400℃ and less than or equal to 1000℃. Alternatively, the sintering temperature is greater than or equal to 400℃ and less than or equal to 700℃. For example, it could be 500℃ or 600℃.

[0100] In some technical solutions, optionally, the screen mold 2 is provided with through holes 24 for each coating area 1222, and the number of through holes 24 on the screen mold 2 per square inch is greater than or equal to 250 and less than or equal to 300.

[0101] In this embodiment, the number of through-holes 24 on the screen die 2 per square inch is limited to between 250 and 300, further improving aesthetics and light transmittance. Optionally, the number of through-holes 24 is equal to 250, 270, or 300.

[0102] like Figure 1 As shown, the third aspect of the present invention provides a photovoltaic module 1, comprising: a panel 12 as provided in any of the first aspects of the present invention; or a panel 12 prepared by a panel preparation method as provided in any of the second aspects of the present invention. Since the photovoltaic module 1 provided by the present invention includes the panel 12 provided in any of the first aspects of the present invention, or includes a panel 12 prepared by a panel preparation method as provided in any of the second aspects of the present invention, it possesses all the beneficial effects of the panel 12 provided in any of the first aspects of the present invention, which will not be elaborated further here.

[0103] In some technical solutions, the photovoltaic module 1 may optionally include a battery layer 16 disposed on one side of the panel 12, and a coating 4 disposed between the visualization panel 122 and the battery layer 16.

[0104] In this embodiment, the coating 4 is disposed between the visualization plate 122 and the battery layer 16. This allows the visualization plate 122 to provide some protection for the coating 4, preventing it from being damaged by external forces and also avoiding the problem of the coating 4 being damaged due to long-term exposure to the outside.

[0105] Another embodiment of the present invention provides a screen printing process for a photovoltaic module 1. First, ink is attached to a glass substrate (i.e., the visualization plate 122 of this application) by screen printing. The ink used is a high-temperature resistant special ink. Then, the ink is bonded to the glass substrate by high-temperature sintering. The temperature resistance range of the special ink is 400℃~1000℃, which can ensure good performance at high temperatures. The coating 4 is located on the inner side of the photovoltaic product, that is, between the visualization plate 122 and the battery layer 16. The mesh count of the 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 ink is not easy to diffuse outward after screen printing). The ink transmittance is <10%. Optionally, the ink is opaque, so that the color is more accurate. The high-temperature ink composition can be: low melting point glass powder / resin, xylene and butyraldehyde mixed solvent, high-temperature filler powder and color powder. The color powder is mainly PbCrO4, nano calcium, fluorescent paste, manganese and cobalt metal compounds. The screen-printed pattern is a dot array, with the area of ​​a single dot ranging from 0.5mm² to 0.2mm², for example, 0.5024mm². The area of ​​the screen-printed pattern accounts for 50% ± 10%, and the rest is unscreened area, ensuring sufficient uniform light transmission. This solution is also applicable to curved photovoltaics.

[0106] Among them, such as Figure 4 As shown, each coating area 1222 can be a dot, with a diameter φ1 between 0.5mm and 1.0mm (it can be 0.8mm). The horizontal distance W1 and vertical distance H1 of the dots are both between 0.05mm and 0.3mm (it can be 0.2mm) to ensure the area ratio.

[0107] like Figure 5 As shown, each coating area 1222 can be elliptical, with a diameter φ2 < φ3. The minor axis of the ellipse is arranged along the curvature of the glass, thus ensuring the area ratio. Along the length of the visualization plate 122, the spacing W2 between two adjacent coating areas 1222 is between 0.05mm and 0.3mm, for example, 0.2mm. Along the width of the visualization plate 122, the spacing H2 between two adjacent coating areas 1222 is between 0.05mm and 0.3mm, for example, 0.2mm.

[0108] Furthermore, each coating area 1222 can be diamond-shaped or figure-eight shaped, such as... Figure 6 and Figure 7 As shown, when the coating area 1222 is rhomboid, W3 < W4. W3 is arranged along the curvature of the glass and staggered to ensure that the spacing X1 between two staggered coating areas 1222 is between 0.05mm and 0.3mm, for example, 0.2mm, to ensure the area ratio. Along the width direction of the visualization plate 122, the spacing H3 between two adjacent coating areas 1222 is between 0.05mm and 0.3mm.

[0109] In this embodiment, the panel 12 uses finely distributed dotted ink to effectively activate each PN junction of the photovoltaic cell (where P represents P-type, i.e., positive type, and N represents N-type, i.e. negative type), making it less prone to hot spot effects, ensuring consistent appearance, and maximizing power output.

[0110] In embodiments of the present invention, the terms "first," "second," and "third" are used only for descriptive purposes and should not be construed as indicating or implying relative importance; the term "multiple" refers to two or more unless otherwise expressly defined. The terms "install," "connect," "link," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "link" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in embodiments of the present invention according to the specific circumstances.

[0111] Furthermore, although the operations are described in a specific order, this should be understood as requiring that such operations be performed in a specific order or sequential order, or requiring that all illustrated operations be performed to achieve the desired result. In certain environments, multitasking and parallel processing may be advantageous. Similarly, although several specific implementation details are included in the above discussion, these should not be construed as limiting the scope of the invention. Certain features described in the context of individual embodiments may also be implemented in combination in a single implementation. Conversely, various features described in the context of a single implementation may also be implemented individually or in any suitable sub-combination in multiple implementations.

[0112] Although the subject matter has been described using language describing specific structural features and / or methodological logic, it should be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or actions described above. Rather, the specific features and actions described above are merely illustrative examples of implementing the claims.

[0113] The above are merely embodiments of the present invention and are not intended to limit the scope of the embodiments. Those skilled in the art will recognize that various modifications and variations are possible with respect to the embodiments of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the embodiments of the present invention should be included within the protection scope of the embodiments of the present invention.

Claims

1. A panel, characterized in that, For use in photovoltaic modules, the panel includes: A visualization board, the visualization board comprising a plurality of coated areas and an uncoated area defined by the plurality of coated areas; A coating is disposed on the coating area, wherein the area of ​​each coating area is greater than or equal to 0.1 mm2 and less than or equal to 1 mm2.

2. The panel according to claim 1, characterized in that, The area of ​​the coated area is A1, the area of ​​the uncoated 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.

3. The panel according to claim 2, characterized in that, The value of A1 / (A1+A2) is greater than or equal to 0.4 and less than or equal to 0.

6.

4. The panel according to claim 1, characterized in that, The area of ​​each of the coating regions is greater than or equal to 0.3 mm² and less than or equal to 0.7 mm². 2 ; and / or The light transmittance of the coating is less than or equal to 10%.

5. The panel according to claim 1, characterized in that, 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.

6. The panel according to claim 1, characterized in that, The coating areas are arranged 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.

7. The panel according to claim 1, characterized in that, The coating area includes one or a combination of the following: a circular coating area, an elliptical coating area, a diamond-shaped coating area, and a figure-eight-shaped coating area.

8. The panel according to claim 1, characterized in that, The coating area includes circular coating areas with a diameter 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.

9. The panel according to any one of claims 1 to 8, characterized in that, The panel includes a curved panel.

10. The panel according to claim 9, characterized in that, The curved panel includes crests and troughs, which are spaced apart along a first direction. The coating area is elliptical in shape, and the direction of the minor axis of the ellipse is the same as the first direction.

11. The panel according to claim 9, characterized in that, The curved panel includes crests and troughs, which are spaced apart along a first direction. The coating area is rhomboid in shape, which includes a first diagonal and a second diagonal. The length of the first diagonal is greater than the length of the second diagonal, and the extension direction of the second diagonal is the same as the first direction.

12. The panel according to claim 11, characterized in that, The two closest coating areas are staggered.

13. A method for preparing a panel, characterized in that, A method for preparing a panel as described in any one of claims 1 to 12, the method comprising: The coating is prepared on the coating area using a screen printing mold; The visualization board with the printed coating is sintered to obtain the panel.

14. The method for preparing a panel according to claim 13, characterized in that, During the sintering process, the sintering temperature is greater than or equal to 400℃ and less than or equal to 1000℃; and / or The screen printing mold is provided with through holes for each of the coating areas, and the number of through holes on the screen printing mold is greater than or equal to 250 and less than or equal to 300 per square inch.

15. A photovoltaic module, characterized in that, include: The panel as claimed in any one of claims 1 to 12; or The panel is prepared by the panel preparation method as described in claim 13 or 14.

16. The photovoltaic module according to claim 15, characterized in that, Also includes: A battery layer is disposed on one side of the panel, and the coating is disposed between the visualization panel and the battery layer.

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