Photovoltaic module

Abstract

The utility model provides a photovoltaic module, and relates to the technical field of photovoltaic power generation. The photovoltaic module comprises a battery packaging plate which is provided with a light receiving side and a backlight side which are opposite to each other; the panel is arranged on the light receiving side of the battery packaging plate and comprises a substrate, and the substrate is provided with a light receiving surface and a backlight surface which are opposite to each other; the first rough layer is arranged on the light receiving surface of the substrate, the roughness of the first rough layer is the target roughness, and the target roughness is larger than or equal to 0.6 mu m and smaller than or equal to 1.0 mu m. According to the photovoltaic module, the problem of light pollution caused by glare of the photovoltaic module is solved, the light transmittance of the panel is improved, more light can be transmitted to the battery packaging plate, dust is not prone to being attached to the panel of the photovoltaic module, the dust deposition prevention capacity of the photovoltaic module is improved, and the impact strength of the photovoltaic module is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of photovoltaic power generation, in particular to a photovoltaic module. BACKGROUND

[0002] The photovoltaic module is used for photovoltaic power generation, and can directly convert the energy of solar radiation into electric energy. Therefore, the photovoltaic module is arranged at a position directly irradiated by the sun, such as a roof.

[0003] In the related art, the photovoltaic module arranged on the roof reflects sunlight to a certain extent, and glare occurs easily, which causes light pollution. CONTENT OF THE UTILITY MODEL

[0004] The present application aims to solve the problem of light pollution caused by glare of the photovoltaic module in the prior art or the related art.

[0005] To this end, the present application provides a photovoltaic module.

[0006] Therefore, according to a first aspect of the present application, a photovoltaic module is provided, comprising: a cell packaging plate, the cell packaging plate having opposite light-receiving and back sides; a panel, the panel being arranged on the light-receiving side of the cell packaging plate, the panel comprising: a substrate, the substrate having opposite light-receiving and back sides; and a first rough layer, the first rough layer being arranged on the light-receiving side of the substrate, the roughness of the first rough layer being a target roughness, the target roughness being greater than or equal to 0.6 μm and less than or equal to 1.0 μm.

[0007] In the technical solution of the present application, the photovoltaic module comprises the cell packaging plate and the panel, the panel is arranged on the light-receiving side of the cell packaging plate, and light is transmitted to the cell packaging plate through the panel. The first rough layer is arranged on the light-receiving side of the panel, which can reduce the reflection effect of the panel on light, thereby reducing the glare of the light-receiving side of the panel. Since the panel is arranged on the light-receiving side of the cell packaging plate, the photovoltaic module with the panel has good anti-glare performance, thereby solving the problem of light pollution caused by glare of the photovoltaic module. In addition, the target roughness of the first rough layer of the panel is greater than or equal to 0.6 μm and less than or equal to 1.0 μm, which can further improve the light transmittance of the panel, so that more light can be transmitted to the cell packaging plate. In addition, the friction of the surface of the panel is smaller, so that dust is not easy to adhere to the panel of the photovoltaic module, thereby improving the dust accumulation resistance of the photovoltaic module. In addition, since the impact resistance of the panel is high, the impact resistance of the photovoltaic module is improved.

[0008] In some technical solutions, the photovoltaic module further comprises: a second rough layer, the second rough layer being arranged on the back side of the substrate, the roughness of the second rough layer being the target roughness.

[0009] In the technical scheme of the present application, the second rough layer is arranged on the back light surface of the substrate, and the roughness of the second rough layer is set to be the same as the target roughness of the first rough layer on the light receiving surface. Without increasing the operation steps of the panel preparation process, the anti-glare performance of the panel is further improved, and at the same time, the bubbles between the panel and the battery packaging plate are avoided when the panel is packaged on the battery packaging plate, thereby improving the yield of the photovoltaic module.

[0010] In some technical schemes, the photovoltaic module further comprises:

[0011] The particle structure is etched on the light receiving surface and the back light surface of the substrate to form the first rough layer on the light receiving surface of the substrate and the second rough layer on the back light surface of the substrate.

[0012] In the technical scheme of the present application, the first rough layer on the light receiving surface and the second rough layer on the back light surface of the panel are formed synchronously by etching and polishing the light receiving surface and the back light surface of the substrate synchronously, which ensures the consistency of the first rough layer and the second rough layer, simplifies the preparation process of the panel, reduces the production cost of the panel, and is easy to be industrialized.

[0013] In some technical schemes, the light transmittance of the substrate is in the range of 85% to 100%.

[0014] In the technical scheme of the present application, the light transmittance of the substrate is greater than or equal to 85% and less than or equal to 100%, so that the panel processed based on the substrate has good light transmittance, and when the panel is arranged on the photovoltaic module, the transmittance of sunlight in the panel is improved, thereby improving the power generation efficiency of the photovoltaic module.

[0015] In some technical schemes, the panel comprises at least one of the following: a flat panel, a curved panel.

[0016] In the technical scheme of the present application, the shape of the panel is set to be a flat shape or a curved shape, so that the panel can be adapted to the photovoltaic module with a flat shape or a curved shape, thereby widening the application scenarios of the panel, and when the panel is applied to the photovoltaic module with a curved shape, the glare of the photovoltaic module can be effectively reduced.

[0017] In some technical schemes, the substrate comprises at least one of the following: a textured glass plate, a flat glass plate.

[0018] In the technical scheme of the present application, the substrate can be a textured glass plate or a flat glass plate, and the corresponding panel can be obtained by etching and polishing the textured glass plate or the flat glass plate. Since the substrate can be any one of the textured glass plate and the flat glass plate, the selection range of the substrate is expanded, thereby reducing the production cost of the panel.

[0019] In some embodiments, the thickness of the substrate is in a range from 2mm to 4mm.

[0020] In the present application, the thickness of the substrate is in a range from greater than or equal to 2mm to less than or equal to 4mm. By limiting the thickness of the substrate in the above range, the anti-glare performance of the panel can be improved by the target roughness of the first rough layer on the light-receiving surface of the substrate.

[0021] In some embodiments, the photovoltaic module further comprises a back plate disposed on the back light side of the cell packaging plate, wherein the side of the back plate facing the cell packaging plate is a rough surface.

[0022] In the present application, the photovoltaic module further comprises a back plate assembled on the back light side of the cell packaging plate, i.e. the cell packaging plate is assembled between the panel and the back plate, and the side of the back plate facing the cell packaging plate is a rough layer.

[0023] Specifically, the side of the back plate facing the cell packaging plate is provided with a third rough layer. When the back plate and the cell packaging plate are assembled, the third rough layer is on the back light side facing the cell packaging plate, i.e. the third rough layer is in contact with the cell packaging plate, so that the third rough layer can provide a gap between the back plate and the cell packaging plate to reduce the generation of bubbles between the back plate and the cell packaging plate during packaging.

[0024] In some embodiments, the cell packaging plate comprises at least one of the following: a planar cell packaging plate, a curved cell packaging plate; wherein the shapes of the cell packaging plate, the panel and the back plate are matched.

[0025] In the present application, the panel is provided in a planar shape or a curved shape, so that the panel can be adapted to photovoltaic modules with planar or curved shapes, thereby widening the application scenarios of the panel, and effectively reducing the glare of the photovoltaic module when the panel is applied to a photovoltaic module with a curved shape.

[0026] In some embodiments, the photovoltaic module further comprises an encapsulation adhesive film disposed between the cell packaging plate and the panel, and between the cell packaging plate and the back plate.

[0027] In the present application, the encapsulation adhesive film is used to connect the cell packaging plate and the panel, and to connect the cell packaging plate and the back plate. By disposing the encapsulation adhesive film between the cell packaging plate, the panel and the back plate, the cell packaging plate, the panel and the back plate are stably connected through the encapsulation adhesive film, thereby improving the connection stability of the cell packaging plate, the panel and the back plate in the photovoltaic module.

[0028] Additional aspects and advantages of the present application will become apparent in the following description, or will be learned by practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0029] The above and / or additional aspects and advantages of the present application will become apparent and more readily appreciated from the following description, taken in conjunction with the following drawings in which:

[0030] Figure 1 One of structural schematic diagrams of a photovoltaic module provided in some embodiments of the present application is shown;

[0031] Figure 2 Another of structural schematic diagrams of a photovoltaic module provided in some embodiments of the present application is shown;

[0032] Figure 3 One of structural schematic diagrams of a panel provided in some embodiments of the present application is shown;

[0033] Figure 4 Another of structural schematic diagrams of a panel provided in some embodiments of the present application is shown;

[0034] Figure 5 Another of structural schematic diagrams of a panel provided in some embodiments of the present application is shown;

[0035] Figure 6 Another of structural schematic diagrams of a panel provided in some embodiments of the present application is shown;

[0036] Figure 7 A flow chart of a method for preparing a panel provided in some embodiments of the present application is shown;

[0037] Figure 8 A flow chart of a method for preparing a photovoltaic module provided in some embodiments of the present application is shown.

[0038] Reference signs are as follows:

[0039] 100 panel, 110 substrate, 112 light-receiving surface, 114 back light surface, 120 first rough layer, 130 second rough layer, 140 particle structure, 200 photovoltaic module, 210 cell packaging plate, 212 light-receiving side, 214 back light side, 220 back plate, 230 encapsulation adhesive film. DETAILED DESCRIPTION

[0040] In order to enable a more complete understanding of the above-mentioned objects, features and advantages of the present application, the present application will be described in further detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the features in the embodiments and examples can be combined with each other if not in conflict.

[0041] In the following description, a large number of specific details are set forth in order to facilitate a thorough understanding of the present application, but the present application can also be implemented in other ways different from those described herein, and therefore the scope of protection of the present application is not limited by the specific embodiments disclosed below.

[0042] The application will be described below with reference to Figures 1 to 8 A photovoltaic module according to some embodiments of the application is described.

[0043] According to one embodiment of the application, Figure 1 One of the structural diagrams of the photovoltaic module provided in some embodiments of the application is shown, Figure 2 Another structural diagram of the photovoltaic module provided in some embodiments of the application is shown, Figure 3 One of the structural diagrams of the panel provided in some embodiments of the application is shown, Figure 4 Another structural diagram of the panel provided in some embodiments of the application is shown, as Figure 1 、 Figure 2 、 Figure 3 and Figure 4 A photovoltaic module 200 is provided, as shown in the drawings, comprising: a cell packaging plate 210, the cell packaging plate 210 having opposite light-receiving side 212 and back light side 214; a panel 100, the panel 100 being arranged on the light-receiving side 212 of the cell packaging plate 210, the panel 100 comprising: a substrate 110, the substrate 110 having opposite light-receiving surface 112 and back light surface 114; a first rough layer 120, the first rough layer 120 being arranged on the light-receiving surface 112 of the substrate 110, the roughness of the first rough layer 120 being a target roughness, the target roughness being greater than or equal to 0.6 μm and less than or equal to 1.0 μm.

[0044] In this embodiment, the photovoltaic module 200 comprises the cell packaging plate 210 and the panel 100, the panel 100 being assembled on the light-receiving side 212 of the cell packaging plate 210, and the light being transmitted to the cell packaging plate 210 through the panel 100.

[0045] It should be noted that the cell packaging plate 210 is a photoelectric cell, i.e. a semiconductor element that generates electromotive force under the irradiation of light.

[0046] In the embodiments of the application, the light-receiving surface 112 of the panel 100 is provided with the first rough layer 120, and the panel 100 is assembled on the light-receiving side 212 of the cell packaging plate 210, so that the assembled photovoltaic module 200 has good anti-glare performance.

[0047] In this embodiment, the panel 100 comprises the substrate 110 and the first rough layer 120 arranged on the substrate 110, the first rough layer 120 being located on the light-receiving surface 112 of the substrate 110. The panel 100 can serve as an upper support layer of the photovoltaic module 200, i.e. the panel 100 is arranged on the light-receiving surface 112 of the cell packaging plate 210, thereby reducing the reflection of sunlight by the photovoltaic module 200, and the panel 100 provided with the first rough layer 120 is in an exposed state, which is less likely to accumulate dust than the panel 100 with a smooth surface.

[0048] Specifically, the first rough layer 120 is integrally formed with the substrate 110, and the substrate 110 can be a glass substrate. The first rough layer 120 is formed on the light-receiving surface 112 of the substrate 110 by etching and polishing the glass substrate. In this way, the substrate 110 does not need to be coated when the first rough layer 120 is arranged, thereby simplifying the production process.

[0049] In this embodiment, the target roughness of the first rough layer 120 is greater than or equal to 0.6 μm and less than or equal to 1.0 μm. It can be understood that by setting the target roughness to be 0.6 μm or more, the light-receiving surface 112 of the panel 100 has sufficient roughness to reduce the overall reflection of light by the panel 100. By setting the target roughness to be less than or equal to 1.0 μm, the adverse effects of excessively rough textures on the light transmittance of the panel 100 can be avoided. In this way, the light reflectance of the panel 100 can be reduced while maintaining the light transmittance of the panel 100, thereby reducing the degree of glare caused by the panel 100 when arranged on the photovoltaic module 200.

[0050] Exemplarily, the substrate 110 can be super white glass.

[0051] Exemplarily, the target roughness can be 0.8 μm.

[0052] The effects of the target roughness on the light transmittance of the panel and the effects of the target roughness on the power of the photovoltaic module 200 are described below in conjunction with experimental data, as shown in Table 1:

[0053] Table 1

[0054]

[0055] As can be seen from Table 1 above, when the target roughness of the panel 100 is set to be 0.6 μm to 1.0 μm, the light transmittance of the panel 100 is higher and the haze is lower compared to when the target roughness is set to be 1.6 μm to 3.0 μm. Furthermore, when the panel 100 with a target roughness of 0.6 μm to 1.0 μm is arranged on the photovoltaic module 200, the power of the photovoltaic module 200 is higher.

[0056] It should be noted that the panel 100 can be arranged in the photovoltaic module 200, i.e., on the solar cell panel, to reduce the glare of the solar cell panel. The panel 100 can also be arranged on a display screen or a touch screen to improve the visual effect and user experience of the display screen or the touch screen.

[0057] The effects of the target roughness on the panel's ability to prevent dust accumulation are described below in conjunction with experimental data, as shown in Table 2:

[0058] Table 2

[0059]

[0060] It can be seen from the above Table 2 that the photovoltaic module 200 with the panel 100 having the target roughness of 0.6 μm to 1.0 μm has a lower power loss ratio after being placed outdoors for 3 months, only 4%, compared to the photovoltaic module 200 with the panel 100 having the target roughness of 1.6 μm to 3.0 μm and the photovoltaic module 200 with the panel 100 having the target roughness of 0.1 μm to 0.5 μm. It can be understood that the panel 100 having the target roughness of 0.6 μm to 1.0 μm can better reduce the impact of dust accumulation on the power of the photovoltaic module 200, thereby improving the anti-dust effect of the photovoltaic module 200 provided with the panel 100.

[0061] The following describes the impact of the target roughness on the impact strength of the panel 100 in combination with experimental data, as shown in Table 3:

[0062] Table 3

[0063]

[0064] It can be seen from the above Table 3 that the panel 100 having the target roughness of 0.6 μm to 1.0 μm has a higher impact strength in the 500g steel ball drop experiment of the panel compared to the panel 100 having the target roughness of 1.6 μm to 3.0 μm. Therefore, the panel 100 having the target roughness of 0.6 μm to 1.0 μm can effectively improve the impact strength of the panel 100.

[0065] In this embodiment, by etching and polishing the substrate 110, the light-receiving surface 112 of the substrate 110 forms the first rough layer 120, and the target roughness range of the first rough layer of the panel is set to be greater than or equal to 0.6 μm and less than or equal to 1.0 μm, which can improve the light transmittance of the panel 100, reduce the light reflection of the panel 100, and also reduce the friction of the surface of the panel 100. The present application improves the light transmittance of the panel 100, so that the light transmission through the first rough layer 120 is better, and when the panel 100 is applied to the photovoltaic assembly 200, more light can be transmitted to the cell packaging plate 210. By improving the utilization of light energy, the light reflection of the panel 100 is further reduced, and the light pollution caused by the glare of the panel 100 is further reduced, so that the dust is not easy to adhere to the surface of the panel 100, the dust accumulation resistance of the panel 100 is improved, and the impact strength of the panel 100 is also improved. The target roughness of the first rough layer 120 is set to be greater than or equal to 0.6 μm and less than or equal to 1.0 μm, so that the panel 100 has good light transmittance, good anti-glare effect, and is not easy to accumulate dust.

[0066] In the embodiment of the present application, the photovoltaic assembly 200 includes the cell packaging plate 210 and the panel 100, the panel 100 is arranged on the light-receiving side 212 of the cell packaging plate 210, and the light is transmitted to the cell packaging plate 210 through the panel 100. The first rough layer 120 is arranged on the light-receiving surface 112 of the panel 100, which can reduce the reflection of the panel 100 to the light, thereby reducing the glare of the light-receiving surface 112 of the panel 100. Since the panel 100 is arranged on the light-receiving side 212 of the cell packaging plate 210, the photovoltaic assembly 200 with the panel 100 has good anti-glare effect, and solves the problem of light pollution caused by the glare of the photovoltaic assembly 200. The target roughness range of the first rough layer 120 of the panel 100 is greater than or equal to 0.6 μm and less than or equal to 1.0 μm, which can further improve the light transmittance of the panel 100, so that more light can be transmitted to the cell packaging plate 210, and the friction of the surface of the panel 100 is smaller, so that the dust is not easy to adhere to the panel 100 of the photovoltaic assembly 200, the dust accumulation resistance of the photovoltaic assembly 200 is improved, and the impact strength of the photovoltaic assembly 200 is improved due to the high impact strength of the panel 100.

[0067] Figure 5 Fig. 3 shows a structural schematic diagram of a panel provided in some embodiments of the present application, Figure 6 Fig. 4 shows a structural schematic diagram of a panel provided in some embodiments of the present application, Figures 1 to 6As shown, in some embodiments, the photovoltaic module 200 may optionally include a second roughening layer 130 disposed on the back surface 114 of the substrate 110, wherein the roughness of the second roughening layer 130 is a target roughness.

[0068] In this embodiment, a second roughening layer 130 may also be provided on the backlight surface 114 of the substrate 110, and the second roughening layer 130 is also a rough texture layer obtained by etching and polishing the substrate 110. Since the roughness of the second roughening layer 130 is in the same range as the target roughness of the first roughening layer 120, the light-receiving surface 112 and the backlight surface 114 of the substrate 110 can be processed simultaneously when etching and polishing the substrate 110, thereby improving the anti-glare performance of the panel 100 and reducing the number of operation steps in the panel 100 manufacturing process.

[0069] It should be noted that when assembling the panel 100 and the battery encapsulation plate 210, since the second rough layer 130 is located on the back surface 114 of the panel 100, that is, the second rough layer 130 is in contact with the battery encapsulation plate 210, the second rough layer 130 can provide a gap between the panel 100 and the battery encapsulation plate 210, reducing the generation of air bubbles between the panel 100 and the battery encapsulation plate 210 during encapsulation.

[0070] In this embodiment, by providing a second roughening layer 130 on the backlight surface 114 of the substrate 110, and setting the roughness of the second roughening layer 130 to a target roughness consistent with the first roughening layer 120 on the light-receiving surface 112, the anti-glare performance of the panel 100 is further improved without increasing the number of operation steps in the panel 100 manufacturing process. At the same time, air bubbles are avoided between the panel 100 and the battery encapsulation plate 210 when the panel 100 is encapsulated, thereby improving the yield of the photovoltaic module 200.

[0071] like Figures 1 to 4 As shown, in some embodiments, the photovoltaic module 200 may optionally further include:

[0072] The particle structure 140 is etched onto the light-receiving surface 112 and the back-lighting surface 114 of the substrate 110 to form a first rough layer 120 on the light-receiving surface 112 of the substrate 110 and a second rough layer 130 on the back-lighting surface 114 of the substrate 110.

[0073] In this embodiment, the light-receiving surface 112 and the backlight surface 114 of the substrate 110 are both etched with particle structures 140. The particle structures 140 form a first rough layer 120 and a second rough layer 130 on the light-receiving surface 112 and the backlight surface 114 of the substrate 110, respectively, thereby obtaining the panel 100.

[0074] Specifically, the substrate 110 is placed into the frosting liquid for etching treatment, and the light-receiving surface 112 and the back light surface 114 of the substrate 110 are formed with the particle structure 140 during the etching treatment. After the etching treatment, the substrate 110 is placed into the etching pool for chemical polishing treatment. The first rough layer 120 on the light-receiving surface 112 of the substrate 110 and the second rough layer 130 on the back light surface 114 of the substrate 110 are both formed with the target roughness after the chemical polishing treatment, so as to complete the preparation of the panel 100.

[0075] In the embodiments of the present application, the light-receiving surface 112 and the back light surface 114 of the substrate 110 are etched and polished synchronously, so as to synchronously form the first rough layer 120 on the light-receiving surface 112 and the second rough layer 130 on the back light surface 114 of the panel 100, which ensures the consistency of the first rough layer 120 and the second rough layer 130, simplifies the preparation process of the panel 100, reduces the production cost of the panel 100, and is easy for industrialized production.

[0076] In some embodiments, optionally, the light transmittance of the substrate 110 ranges from 85% to 100%.

[0077] In the embodiments of the present application, the light transmittance of the substrate 110 is greater than or equal to 85% and less than or equal to 100%, so that the panel 100 processed based on the substrate 110 has good light transmittance, and when the panel 100 is arranged in the photovoltaic module 200, the transmittance of sunlight in the panel 100 is improved, so as to improve the power generation efficiency of the photovoltaic module 200.

[0078] In some embodiments, optionally, the panel 100 includes at least one of a flat panel and a curved panel.

[0079] In this embodiment, the panel 100 can have a flat shape or a curved shape, so that the panel 100 is suitable for products with different shapes.

[0080] For example, when the panel 100 is a curved panel, the curved panel can be assembled with the battery packaging plate 210 with a curved shape to obtain the photovoltaic module 200 with a curved shape. When the panel 100 is a flat panel, the flat panel can be assembled with the battery packaging plate 210 with a flat shape to obtain the photovoltaic module 200 with a flat shape.

[0081] As shown in Figure 1 and Figure 3 , the panel 100 is a flat panel. Figure 2 and Figure 4 , the panel 100 is a curved panel.

[0082] It should be noted that the cross-sectional shape of the curved photovoltaic module 200 is in a "sine wave" shape, and the light is easily concentrated at the "peak" position of the photovoltaic module 200, resulting in more serious glare problem at this position. By assembling the panel 100 with the first rough layer 120 in the curved photovoltaic module 200, the degree of reflection at the "peak" position can be effectively reduced, thereby improving the anti-glare performance of the photovoltaic module 200.

[0083] In the embodiments of the present application, the shape of the panel 100 is set to be a planar shape or a curved shape, so that the panel 100 can be adapted to the photovoltaic module 200 with a planar shape or a curved shape, thereby widening the application scenarios of the panel 100, and when the panel 100 is applied to the photovoltaic module 200 with a curved shape, the glare of the photovoltaic module 200 can be effectively reduced.

[0084] In some embodiments, optionally, the substrate 110 includes at least one of the following: a frosted glass plate, a planar glass plate.

[0085] In the embodiments of the present application, the substrate 110 can be selected from a frosted glass plate or a planar glass plate, and the corresponding panel 100 can be obtained by etching and polishing the frosted glass plate or the planar glass plate. Since the substrate 110 can be selected from any one of the frosted glass plate and the planar glass plate, the selection range of the substrate 110 is expanded, thereby reducing the production cost of the panel 100.

[0086] In some embodiments, optionally, the thickness of the substrate 110 is in a range of 2mm to 4mm.

[0087] In the embodiments of the present application, the thickness of the substrate 110 is greater than or equal to 2mm and less than or equal to 4mm. By limiting the thickness of the substrate 110 within the above range, the anti-glare performance of the panel 100 can be improved in cooperation with the target roughness of the first rough layer 120 of the light-receiving surface 112 of the substrate 110.

[0088] For example, the thickness of the substrate 110 is 4mm, for example, the substrate 110 is selected to be 4mm super white glass.

[0089] In some embodiments, optionally, the photovoltaic module 200 further includes: a back plate 220 arranged on the back light side 214 of the cell packaging plate 210, wherein the side surface of the back plate 220 facing the cell packaging plate 210 is a rough surface.

[0090] Specifically, the backboard 220 is provided with a third rough layer on the side facing the battery packaging plate 210, and the photovoltaic module 200 further comprises the backboard 220 assembled on the back light side 214 of the battery packaging plate 210, that is, the battery packaging plate 210 is assembled between the panel 100 and the backboard 220, and the backboard 220 is provided with a third rough layer on the side facing the battery packaging plate 210. When the backboard 220 is assembled with the battery packaging plate 210, since the third rough layer is located on the back light side 214 of the battery packaging plate 210, that is, the third rough layer is in contact with the battery packaging plate 210, the third rough layer can provide a gap between the backboard 220 and the battery packaging plate 210, thereby reducing the air bubbles generated between the backboard 220 and the battery packaging plate 210 during packaging.

[0091] Exemplarily, the roughness of the third rough layer is the target roughness, that is, the backboard 220 can be produced together with the panel 100, thereby further reducing the production cost of the photovoltaic module 200.

[0092] As shown in Figure 1 In some embodiments, the photovoltaic module 200 further comprises an encapsulation adhesive film 230, which is arranged between the battery packaging plate 210 and the panel 100, and between the battery packaging plate 210 and the backboard 220.

[0093] In the embodiments of the present application, the encapsulation adhesive film 230 is used to connect the battery packaging plate 210 and the panel 100, and to connect the battery packaging plate 210 and the backboard 220. The encapsulation adhesive film 230 is arranged between the battery packaging plate 210 and the panel 100 and the backboard 220, and the battery packaging plate 210, the panel 100 and the backboard 220 are stably connected through the encapsulation adhesive film 230, thereby improving the connection stability of the battery packaging plate 210, the panel 100 and the backboard 220 in the photovoltaic module 200.

[0094] In some embodiments, the battery packaging plate 210 comprises at least one of a flat battery packaging plate and a curved battery packaging plate, and the shapes of the battery packaging plate 210, the panel 100 and the backboard 220 are matched.

[0095] In the embodiments of the present application, the battery packaging plate 210 can be in a planar shape or a curved surface shape, that is, the photovoltaic module 200 can be in a planar shape or a curved surface shape. When the battery packaging plate 210 is a planar battery packaging plate, the panel 100 is a planar panel, and the back plate 220 is a planar back plate. When the battery packaging plate 210 is a curved surface battery packaging plate, the back plate 220 is a curved surface panel, and the back plate 220 is a curved surface back plate. Based on the different shapes of the battery packaging plate 210, the panel 100 and the back plate 220 in different shapes are selected so that the assembled photovoltaic module 200 can be in a planar shape or a curved surface shape, and the photovoltaic module 200 in the planar shape or the curved surface shape has good anti-glare performance.

[0096] It should be noted that the cross-sectional shape of the photovoltaic module 200 in a curved surface shape is in a "sine wave" shape, and light is easily concentrated at the "peak" position of the photovoltaic module 200, resulting in more serious glare problems at the position. By assembling the panel 100 with the first rough layer 120 in the photovoltaic module 200 in a curved surface shape, the degree of reflection at the "peak" position can be effectively reduced, thereby improving the anti-glare performance of the photovoltaic module 200.

[0097] In the embodiments of the present application, the panel 100 is in a planar shape or a curved surface shape, so that the panel 100 can be adapted to the photovoltaic module 200 in a planar shape or a curved surface shape, thereby widening the application scenarios of the panel 100, and when the panel 100 is applied to the photovoltaic module 200 in a curved surface shape, the glare of the photovoltaic module 200 can be effectively reduced.

[0098] According to an embodiment of the present application, Figure 7 A flowchart of a preparation method of a panel provided in some embodiments of the present application is shown in FIG. 7. Figure 7 As shown in FIG. 7, a preparation method of a panel is provided for preparing the panel in any of the above embodiments. The preparation method of the panel comprises the following steps:

[0099] In step 702, etching treatment is performed on the substrate in the frosting liquid to form a particle structure on the substrate.

[0100] In this embodiment, the substrate is placed in the frosting liquid for etching treatment, and the particle structure is formed on the substrate during the etching treatment, and the particle structure is integrally formed with the substrate.

[0101] In step 704, chemical polishing treatment is performed on the etched substrate to form a first rough layer on the light-receiving surface of the substrate, and the roughness of the first rough layer is a target roughness.

[0102] The target roughness is in a range of 0.6 μm to 1.0 μm.

[0103] In the embodiment, the particle structure exists on the etched substrate, and the roughness of the light-receiving surface of the substrate may not reach the target roughness requirement. The first rough layer conforming to the target roughness is formed on the light-receiving surface of the substrate by performing chemical polishing on the etched substrate. The chemical polishing is a method of eliminating scratches and etching and leveling by selectively dissolving uneven areas on the substrate surface by chemical etching of chemical reagents. The chemical polishing requires simple equipment and has high production efficiency.

[0104] Specifically, 2 mm to 4 mm glass is selected as the substrate. First, the substrate is subjected to surface etching treatment by using frosting liquid to form a fine concave-convex structure, i.e., a particle structure. Then, the substrate with the particle structure is subjected to chemical polishing treatment, so that the roughness of the light-receiving surface of the substrate reaches the target roughness requirement, i.e., a first rough layer is formed on the light-receiving surface of the substrate.

[0105] In the embodiment, the light-receiving surface of the substrate forms the first rough layer by etching and polishing on the substrate, and the target roughness of the first rough layer is greater than or equal to 0.6 μm and less than or equal to 1.0 μm, which can improve the light transmittance of the panel, reduce the light reflection of the panel, and reduce the friction on the surface of the panel. The light transmittance of the panel is improved, the light transmission effect through the first rough layer is better, more light can be transmitted to the cell packaging plate when the panel is applied to a photovoltaic assembly, the utilization rate of light energy is improved, the light reflection of the panel is further reduced, the light reflection of the panel is less, the light pollution caused by glare of the panel is reduced, the friction on the surface of the panel is further reduced, dust is not easy to adhere to the surface of the panel, the anti-dust ability of the panel is improved, and the impact strength of the panel is improved.

[0106] In some embodiments, the chemical polishing treatment time is 3 minutes to 20 minutes.

[0107] In the embodiment, the chemical polishing treatment is soaking and polishing the etched substrate in a chemical solution, and the chemical polishing treatment time is greater than or equal to 3 minutes and less than or equal to 20 minutes, so that the first rough layer conforming to the target roughness is formed on the light-receiving surface of the substrate.

[0108] For example, the chemical polishing treatment time is 5 minutes.

[0109] In some embodiments, the back surface of the substrate after the chemical polishing treatment forms a second rough layer, and the roughness of the second rough layer is the target roughness.

[0110] In this embodiment, during the etching process of the whole substrate, the same particle structure as the light-receiving surface is formed on the back light surface of the substrate, and after the chemical polishing treatment of the whole substrate, the second rough layer is formed on the back light surface of the substrate. Since the roughness of the second rough layer is the same as the target roughness range of the first rough layer, the light-receiving surface and the back light surface of the substrate can be processed synchronously during the etching and polishing treatment of the substrate, thereby improving the anti-glare performance of the panel and reducing the operation steps of the panel preparation process.

[0111] It should be noted that when the panel is assembled with the battery packaging plate, since the second rough layer is located on the back light surface of the panel, that is, the second rough layer contacts the battery packaging plate, the second rough layer can provide a gap between the panel and the battery packaging plate, thereby reducing the air bubbles generated between the panel and the battery packaging plate during packaging.

[0112] In the embodiment of the present application, the second rough layer is formed on the back light surface of the substrate after the etching and polishing treatment of the whole substrate, and the roughness of the second rough layer is consistent with the first rough layer of the light-receiving surface. Without increasing the operation steps of the panel preparation process, the anti-glare performance of the panel is further improved, the air bubbles generated between the panel and the battery packaging plate during packaging are avoided, and the yield of the photovoltaic module is improved.

[0113] In some embodiments, optionally, before the etching treatment of the substrate in the frosting liquid and after the etching treatment of the substrate in the frosting liquid, the preparation method of the panel further comprises: cleaning treatment of the etched substrate, wherein the cleaning treatment comprises at least one of the following: acid solution cleaning, neutral solution cleaning.

[0114] In this embodiment, the substrate is cleaned before and after being placed in the frosting liquid for etching treatment, so as to remove dust and stains on the substrate.

[0115] Specifically, before the substrate is placed in the frosting liquid for etching, the substrate is first placed in a weak acid pool for cleaning by an acid solution to remove dust and stains on the substrate, and then the substrate is placed in a clean water pool for cleaning by a neutral solution to remove residual acid solution on the substrate. After the etching of the substrate is completed, the substrate is first placed in the clean water pool for cleaning by the neutral solution to remove residual frosting liquid, and then the substrate is placed in the weak acid pool for cleaning by the acid solution to remove dust and stains on the substrate. After the chemical polishing of the substrate is completed, the substrate is placed in the clean water pool for cleaning, and after the cleaning is completed, the substrate is air-dried to form the first rough layer on the light-receiving side of the substrate.

[0116] In the embodiment of the present application, the dust and stains on the substrate can be cleaned before etching and polishing by cleaning the substrate with an acidic solution and / or a neutral solution before and after etching the substrate, thereby ensuring the etching and polishing effects of the substrate and further improving the yield of the panel.

[0117] In some embodiments, after the etched substrate is subjected to the chemical polishing, the method for manufacturing the panel further comprises: performing a plane tempering process on the substrate to obtain a plane panel; or performing a curved bending tempering process on the substrate to obtain a curved panel.

[0118] In this embodiment, the panel can have a plane shape or a curved shape, so that the panel is suitable for products with different shapes.

[0119] Specifically, when the panel is a plane panel, the substrate formed with the first rough layer is subjected to a plane tempering process, so that the substrate has a plane shape and high strength. When the panel is a curved panel, the substrate formed with the first rough layer is subjected to a curved bending tempering process, so that the substrate has a curved shape and high strength.

[0120] In the embodiment of the present application, the panel is provided with a plane shape or a curved shape, so that the panel can be adapted to photovoltaic modules with a plane shape or a curved shape, thereby widening the application scenarios of the panel, and effectively reducing the glare of the photovoltaic module when the panel is applied to a photovoltaic module with a curved shape.

[0121] According to one embodiment of the present application, Figure 8 A flowchart of a method for manufacturing a photovoltaic module provided in some embodiments of the present application is shown in FIG. 8. Figure 8 As shown in FIG. 8, a method for manufacturing a photovoltaic module is provided, which is used to manufacture the photovoltaic module in any of the above embodiments. The method for manufacturing the photovoltaic module comprises the following steps:

[0122] In step 801, a 4mm super white glass plate is selected as the substrate;

[0123] In step 802, the substrate is placed in a weak acid pool for cleaning;

[0124] In step 803, the substrate is placed in a clean water pool for cleaning;

[0125] In step 804, the substrate is placed in a frosting liquid for etching, so as to form a granular structure on the light-receiving surface and the back surface of the substrate;

[0126] In step 805, the substrate is placed in a clean water pool for cleaning;

[0127] In step 806, the substrate is placed in a weak acid pool for cleaning;

[0128] Step 807, the substrate is placed in an etching tank for chemical polishing, and the process lasts for 5 minutes;

[0129] Step 808, the substrate is placed in a clean water tank for cleaning, and then the substrate is air dried, so that a first rough layer is formed on the light receiving surface of the substrate, and a second rough layer is formed on the back light surface of the substrate;

[0130] The roughness of the first rough layer and the second rough layer is a target roughness, and the target roughness is in a range of 0.6 μm to 1.0 μm.

[0131] Step 809, the substrate is subjected to a glass cutting process;

[0132] Step 810, the substrate is subjected to a punching process and an edge grinding process;

[0133] Step 811, the substrate is subjected to a flat glass tempering process or a curved glass bending tempering process, so that a panel is obtained;

[0134] Step 812, the panel is laminated and packaged with a battery packaging plate, so that a photovoltaic module is obtained.

[0135] It should be noted that in the claims, the specification and the drawings of the present application, the term "a plurality of" means two or more, unless otherwise explicitly limited, and the terms "upper", "lower", and the like indicate the orientation or positional relationship shown in the drawings, which are only used to facilitate the description of the present application and make the description process more simple, and are not intended to indicate or imply that the device or element must have the specific orientation, be constructed and operated in a specific orientation, therefore these descriptions cannot be understood as limitations on the present application; the terms "connection", "installation", "fixation" and the like should be understood in a broad sense, for example, "connection" can be a fixed connection between objects, or a detachable connection between objects, or an integral connection; it can be a direct connection between objects, or an indirect connection between objects through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances of the above data.

[0136] In the claims, the specification and the drawings of the present application, the description of the terms "one embodiment", "some embodiments", "a specific embodiment" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the claims, the specification and the drawings of the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0137] The above merely provides preferred embodiments of the present application, and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the principles and technical scope of the present application shall fall into the scope of the present application.

Claims

1. A photovoltaic module, characterized by, The application relates to a battery packaging plate and a packaging panel. The battery packaging plate has opposite light-receiving and back sides. The packaging panel is arranged on the light-receiving side of the battery packaging plate and comprises: A substrate has opposite light-receiving and back sides. A first rough layer is arranged on the light-receiving side of the substrate, and the roughness of the first rough layer is a target roughness, which is greater than or equal to 0.6 mu m and less than or equal to 1.0 mu m.

2. The photovoltaic module of claim 1, wherein, Further comprising: A second rough layer is arranged on the back side of the substrate, and the roughness of the second rough layer is the target roughness.

3. The photovoltaic module of claim 2, wherein, Further comprising: A particle structure is etched and arranged on the light-receiving and back sides of the substrate to form the first rough layer on the light-receiving side of the substrate and the second rough layer on the back side of the substrate.

4. The photovoltaic module according to any of claims 1 to 3, characterized in that, The light transmittance of the substrate ranges from 85% to 100%.

5. The photovoltaic module according to any of claims 1 to 3, characterized in that, The packaging panel comprises at least one of a flat panel and a curved panel.

6. The photovoltaic module according to any of claims 1 to 3, characterized in that, The substrate comprises at least one of a rough glass plate and a flat glass plate.

7. The photovoltaic module according to any of claims 1 to 3, characterized in that, The thickness of the substrate ranges from 2 mm to 4 mm.

8. The photovoltaic module of claim 1, wherein, Further comprising: A back plate is arranged on the back side of the battery packaging plate, and the side of the back plate facing the battery packaging plate is a rough surface.

9. The photovoltaic module of claim 8, wherein, The battery packaging plate comprises at least one of a flat battery packaging plate and a curved battery packaging plate. The shapes of the battery packaging plate, the packaging panel and the back plate are matched.

10. The photovoltaic module of claim 9, wherein, Further comprising a packaging adhesive film arranged between the battery packaging plate and the packaging panel and between the battery packaging plate and the back plate.

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