Curved-surface photovoltaic tile and photovoltaic module

Abstract

The utility model discloses a curved-surface photovoltaic tile and a photovoltaic assembly, the curved-surface photovoltaic tile comprises a battery piece, a curved-surface panel and a light filtering layer, and the battery piece comprises a first surface and a second surface which are opposite to each other; the curved panel covers the first surface of the battery piece; the light filtering layer and the curved surface panel are arranged in a stacked mode, the light filtering layer is located on one side of the first surface, and the light filtering layer is configured to penetrate visible light and block light with the wavelength larger than 800 nm. Visible light penetrates through the light filtering layer, and light with the wavelength of 800 nm or above is blocked, so that light reflection of the curved panel under illumination is avoided to a certain extent, the appearance consistency of the curved photovoltaic tile is improved, meanwhile, most of infrared radiation is blocked from entering the curved photovoltaic tile, the problem that internal components such as a battery piece are heated due to the influence of the infrared radiation is solved, and the service life of the curved photovoltaic tile is prolonged. And the power generation performance is improved.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic technology, and more specifically, to a curved photovoltaic tile and a photovoltaic module. Background Technology

[0002] Photovoltaic tiles are devices that convert solar energy into electrical energy. The solar cells in photovoltaic tiles absorb light and convert light energy into electrical energy. To enhance structural strength, protect the solar cells, and ensure light transmission, panels are stacked on top of the solar cells. These panels can be designed in various colors to increase aesthetics. However, the surface of the light-transmitting panels is usually smooth, resulting in strong reflections under sunlight, making it difficult to control the consistency of the product's appearance. Utility Model Content

[0003] This utility model provides a curved photovoltaic tile and a photovoltaic module.

[0004] The curved photovoltaic tile of this application includes a solar cell, a curved panel, and a filter layer. The solar cell includes a first surface and a second surface facing away from each other. The curved panel covers the first surface of the solar cell. The filter layer is stacked with the curved panel and located on one side of the first surface. The filter layer is configured to transmit visible light and block light with wavelengths above 800 nm.

[0005] The curved photovoltaic tile of this application incorporates a filter layer on one side of the first surface of the solar cell. This filter layer allows visible light to pass through while blocking light with wavelengths above 800nm, thereby mitigating glare on the curved panel under illumination and improving the uniformity of the curved photovoltaic tile's appearance. Furthermore, by blocking light with wavelengths above 800nm, the filter layer effectively blocks most infrared radiation from entering the curved photovoltaic tile, reducing heat generation issues caused by infrared radiation affecting internal components such as the solar cell, and ultimately improving power generation performance.

[0006] In some embodiments, the thickness of the filter layer ranges from 0.1 mm to 0.6 mm.

[0007] In some embodiments, the projection of the filter layer onto the solar cell along the thickness direction of the curved panel coincides with the outer contour of the solar cell.

[0008] In some embodiments, the filter layer is disposed on the side surface of the curved panel opposite to the battery cell or on the side surface facing the battery cell.

[0009] In some embodiments, the curved photovoltaic panel further includes a back sheet, a first adhesive film layer, and a second adhesive film layer, wherein the filter layer, the curved panel, the first adhesive film layer, the solar cell, the second adhesive film layer, and the back sheet are stacked sequentially.

[0010] In some embodiments, the curved panel, the filter layer, the first adhesive film layer, the battery cell, the second adhesive film layer, and the back plate are stacked sequentially.

[0011] In some embodiments, the filter layer is configured to have a light blocking rate of more than 50% in the 800nm ​​to 1100nm wavelength band and a light blocking rate of more than 80% in wavelengths above 1100nm.

[0012] In some embodiments, the curved panel is a glass plate, and the side of the curved panel opposite to the battery cell has a smooth surface.

[0013] In some embodiments, the number of solar cells is multiple, and the multiple solar cells are arranged along at least one direction. The curved photovoltaic tile also includes a solder strip that connects two adjacent solar cells along a first direction.

[0014] In some embodiments, two adjacent battery cells are stacked together along a first direction. The solder strip includes a plurality of first solder segments and at least one second solder segment. The first solder segment is connected to a corresponding battery cell. The second solder segment connects two adjacent first solder segments along the first direction. The second solder segment is located between two adjacent battery cells and spans the stacked area of ​​the two adjacent battery cells. The second solder segment is flat.

[0015] The photovoltaic module of this application includes a plurality of curved photovoltaic tiles as described above, and the plurality of curved photovoltaic tiles are electrically connected.

[0016] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] The above and / or additional aspects and advantages of this invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0018] Figure 1 This is a three-dimensional schematic diagram of the curved photovoltaic tile according to an embodiment of the present invention;

[0019] Figure 2 This is a three-dimensional exploded structural diagram of the curved photovoltaic tile according to an embodiment of the present invention;

[0020] Figure 3 This is an exploded structural diagram of the curved photovoltaic tile according to an embodiment of the present invention;

[0021] Figure 4This is an exploded structural diagram of a curved photovoltaic tile according to another embodiment of the present invention;

[0022] Figure 5 This is a schematic diagram of the structure of the battery cell according to an embodiment of the present invention;

[0023] Figure 6 This is a side view of the curved photovoltaic tile according to an embodiment of the present invention.

[0024] Explanation of reference numerals in the attached figures:

[0025] 100 - Curved photovoltaic tile; 10 - Solar cell; 11 - Stacked area; 12 - First surface; 13 - Second surface; 20 - Welding strip; 21 - First welding section; 22 - Second welding section; 30 - Curved panel; 40 - Filter layer; 50 - Back sheet; 61 - First adhesive film layer; 62 - Second adhesive film layer; D1 - First direction; D2 - Second direction. Detailed Implementation

[0026] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0027] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0028] The following disclosure provides many different embodiments or examples for implementing various structures of this invention. To simplify the disclosure, specific examples of components and settings are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or settings discussed. In addition, examples of various specific processes and materials are provided in this invention, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0029] In related technologies, photovoltaic tiles are constructed by stacking panels on solar cells to strengthen the structure of the tile and protect the cells. To ensure light transmittance, the panels are typically made of glass, and various colors can be designed to enhance aesthetics. However, the strong reflection of light from the front of the glass panel leads to poor product appearance consistency.

[0030] Please see Figures 1-3 The curved photovoltaic tile 100 of this application includes a solar cell 10, a curved panel 30 and a light filter layer 40. The solar cell 10 includes a first surface 12 and a second surface 13 facing away from each other. The curved panel 30 covers the first surface 12 of the solar cell 10. The light filter layer 40 is stacked with the curved panel 30 and located on one side of the first surface 12. The light filter layer 40 is configured to transmit visible light and block light with wavelengths above 800 nm.

[0031] The curved photovoltaic tile 100 of this application embodiment has a filter layer 40 provided on one side of the first surface 12 of the solar cell 10. The filter layer 40 transmits visible light and blocks light with wavelengths above 800nm, thereby avoiding reflection of the curved panel 30 under illumination to a certain extent and improving the appearance consistency of the curved photovoltaic tile 100. In addition, by blocking light with wavelengths above 800nm ​​by the filter layer 40, that is, blocking most of the infrared radiation from entering the interior of the curved photovoltaic tile 100, the heat generation problem of internal components such as the solar cell 10 caused by infrared radiation is reduced, which is beneficial to improving power generation performance.

[0032] Specifically, the curved photovoltaic tile 100 is a photovoltaic product with a curved outer surface. The curved photovoltaic tile 100 has a larger light-receiving area and is less prone to water accumulation, making it suitable for rooftops, outdoor flat ground, and other applications. The solar cell 10 converts light energy into electrical energy. The solar cell 10 can be manufactured using Perc (Passivated Emitter Rear Cell) technology, or it can be manufactured using Topcon (Tunnel Oxide Passivated Contact) or HJT (Heterojunction with Intrinsic Thin-film) technology. The solar cell 10 can be curved after pressing.

[0033] The solar cell 10 includes a first surface 12 and a second surface 13 facing away from each other. The first surface 12 is the light-receiving surface, and the second surface 13 is the backlight surface. The solar cell 10 is provided with a variety of electronic components, and the electronic components can be exposed on the first surface 12.

[0034] The curved panel 30 can be made of a light-transmitting material, allowing light to pass through the curved panel 30 and reach the solar cell 10. The curved panel 30 can have crests and troughs on its surface. The crests and troughs of the curved panel 30 can alternate along the extension direction of one side of the curved panel 30.

[0035] Optionally, the filter layer 40 is an infrared cutoff filter. The filter layer 40 includes a substrate (not shown) and a coating (not shown) attached to the surface of the substrate. The coating includes several dielectric materials with different refractive indices and is deposited on the surface of the substrate by a vapor deposition process. The inclusion of several dielectric materials means that there is at least one dielectric material coating. The filter layer 40 typically has a coating formed by multiple dielectric materials, and by creating special reflection and incident paths for light through different refractive indices, it can reflect or absorb light with wavelengths above 800 nm while transmitting visible light in the wavelength range of 370 nm to 780 nm. For example, the coating can be composed of alternating high-refractive-index and low-refractive-index materials.

[0036] Optionally, the filter layer 40 reflects or absorbs infrared light with wavelengths above 800nm ​​and transmits visible light with wavelengths in the range of 370nm to 780nm. The filter layer 40 is generally bluish.

[0037] Please see Figure 2 and Figure 3 In some embodiments, the thickness of the filter layer 40 ranges from 0.1 mm to 0.6 mm. This allows the filter layer 40 to have a certain degree of toughness while ensuring a high transmittance of visible light.

[0038] Specifically, the thickness of the filter layer 40 can be the sum of the thicknesses of the substrate and the coating. For example, the thickness of the filter layer 40 is 0.1 mm, 0.15 mm, 0.23 mm, 0.36 mm, 0.48 mm, 0.5 mm, or 0.6 mm.

[0039] Please see Figure 1 and Figure 2 In some embodiments, the projection of the filter layer 40 along the thickness direction of the curved panel 30 onto the solar cell 10 coincides with the outer contour of the solar cell 10. In this way, the filter layer 40 can completely cover the solar cell 10, so that the light absorbed by the solar cell 10 is fully filtered by the filter layer 40, thereby achieving a better light filtering effect.

[0040] Specifically, the curved panel 30 covers the battery cell 10, and the edge of the curved panel 30 slightly extends beyond the edge of the battery cell 10. That is, the battery cell 10 is located within the projection range of the curved panel 30 along the thickness direction onto the battery cell 10. The battery cell 10, the filter layer 40, and the curved panel 30 are all curved after being stacked. The projections of the battery cell 10, the filter layer 40, and the curved panel 30 along the thickness direction can all be square. The shape and size of the projection of the filter layer 40 along the thickness direction of the curved panel 30 onto the battery cell 10 are the same as the outer contour of the battery cell 10.

[0041] Please see Figure 3 and Figure 4 In some embodiments, the filter layer 40 is disposed on the surface of the curved panel 30 facing away from the battery cell 10 (e.g., Figure 3 (as shown) or one side surface facing the battery cell 10 (such as...) Figure 4 (As shown). In this way, by setting the filter layer 40 on the surface of the curved panel 30, the filter layer 40 is close to the curved panel 30, blocking light with wavelengths above 800nm ​​in advance, thereby avoiding the heating of the curved photovoltaic tile 100 after being exposed to infrared radiation to a certain extent.

[0042] Please see Figures 2-4 In some embodiments, the curved photovoltaic panel further includes a back sheet 50, a first adhesive film layer 61 and a second adhesive film layer 62, and the filter layer 40, the curved panel 30, the first adhesive film layer 61, the solar cell 10, the second adhesive film layer 62 and the back sheet 50 are stacked in sequence.

[0043] In some embodiments, the curved panel 30, the filter layer 40, the first adhesive film layer 61, the battery cell 10, the second adhesive film layer 62, and the back plate 50 are stacked sequentially.

[0044] In this way, by placing the filter layer 40 close to the curved panel 30, light above 800nm ​​is blocked from hitting the first adhesive film layer 61, the second adhesive film layer 62 and the battery cell 10, thereby reducing the heat generation of the first adhesive film layer 61, the second adhesive film layer 62 and the battery cell 10, improving the durability of the adhesive film material, and preventing or reducing the impact of infrared radiation on the power generation performance of the battery cell 10.

[0045] Specifically, the backsheet 50 can be made of metal or polymer material, and the backsheet 50 has a curved shape that matches the curvature of the curved panel 30. The first adhesive layer 61 and the second adhesive layer 62 can be made of polymer material. The first adhesive layer 61 can bond the curved panel 30 (or the filter layer 40) to the solar cell 10, and the second adhesive layer 62 can bond the solar cell 10 to the backsheet 50, thereby improving the structural stability of the curved photovoltaic tile 100. The first adhesive layer 61 is light-transmitting.

[0046] In some embodiments, the filter layer 40 is configured to block more than 50% of light in the 800nm~1100nm wavelength band and more than 80% of light above 1100nm wavelength. In this way, by blocking most of the infrared light by the filter layer 40, the infrared radiation received inside the curved photovoltaic tile 100 is reduced, thereby reducing the heat generation of the components such as the solar cell 10 and improving the power generation performance and service life.

[0047] Specifically, the infrared light wavelength ranges from 750 nm to 10 nm. 6 nm. The curved photovoltaic tile 100 is mainly used outdoors to generate electricity under sunlight. The sunlight shining on the curved photovoltaic tile 100 includes various types of light such as infrared, visible light, and ultraviolet light. The filter layer 40 can block more than 50% of the light in the 800nm~1100nm wavelength band and more than 80% of the light with a wavelength above 1100nm (mainly mid-infrared light).

[0048] In some embodiments, the curved panel 30 is a glass plate, and the surface of the curved panel 30 facing away from the battery cell 10 is smooth. Thus, light enters from the surface of the curved panel 30 facing away from the battery cell 10, and the smooth surface results in less light loss; furthermore, the smooth glass surface enhances the product's aesthetics. In addition, by layering the light filter layer 40 with the curved panel 30, reflections from the glass surface can be reduced, improving the consistency of the product's appearance.

[0049] Specifically, the curved panel 30 can be made of tempered glass and can be directly molded into a curved surface. The curved panel 30 can be a transparent and colorless glass plate, or a red, black, or other colored glass plate. The color of the curved panel 30 can be the same as or different from the color of the filter layer 40.

[0050] Please see Figure 2 and Figure 5 In some embodiments, the number of solar cells 10 is multiple, and the multiple solar cells 10 are arranged along at least one direction. The curved photovoltaic tile 100 also includes a solder ribbon 20, which connects two adjacent solar cells 10 along a first direction. In this way, the solder ribbon 20 can realize the electrical connection of multiple solar cells 10. Specifically, the multiple solar cells 10 are connected by the solder ribbon 20 and form a curved surface that matches the curved panel 30, which can reduce the curvature of individual solar cells 10, facilitate the circuit layout design, and reduce the brittleness of solar cells 10.

[0051] Please see Figure 5 and Figure 6Two adjacent battery cells 10 are partially stacked along the first direction D1. The welding strip 20 includes a plurality of first welding segments 21 and at least one second welding segment 22. The first welding segment 21 is connected to a corresponding battery cell 10. The second welding segment 22 connects two adjacent first welding segments 21 along the first direction D1. The second welding segment 22 is located between two adjacent battery cells 10 and spans the stacked area 11 of the two adjacent battery cells 10. The second welding segment 22 is flat.

[0052] In this way, the welding strip 20 can realize the electrical connection of multiple battery cells 10. The second welding segment 22 is located between two adjacent battery cells 10 and spans the stacked area 11 of the two adjacent battery cells 10. The second welding segment 22 is flat, which increases the contact area between the second welding segment 22 and the battery cell 10, reduces the pressure on the battery cell 10, and thus reduces defects such as cracks in the battery cell 10.

[0053] Multiple solar cells 10 can be arranged in a flat, laid-out manner. Adjacent solar cells 10 are partially stacked, meaning that adjacent solar cells 10 have overlapping areas in the thickness direction. The number of solar cells 10 can be set according to specific needs, such as 2, 3, 10, 50, etc.

[0054] The solder ribbon 20 is used to electrically connect multiple solar cells 10. The solder ribbon 20 can be made of conductive materials such as silver, tin, or alloys to improve its conductivity. The first welding segment 21 of the solder ribbon 20 can be welded to the solar cell 10. The number of second welding segments 22 is one less than the number of first welding segments 21. For example, when there are two first welding segments 21, there is one second welding segment 22. The first welding segment 21 and the second welding segment 22 can be an integral structure.

[0055] The stacked region 11 of two adjacent battery cells 10 refers to the region where two adjacent battery cells 10 have overlapping areas. The second welding segment 22 spans the stacked region 11, meaning that the ends of the second welding segment 22 along the first direction D1 extend beyond the stacked region 11. The second welding segment 22 is flat, meaning that the width of the second welding segment 22 is greater than the height of the second welding segment 22.

[0056] It should be noted that the surface with the largest area of ​​the second welding section 22 faces the battery cell 10 or is in contact with the battery cell 10.

[0057] Please see Figure 6 In some embodiments, in two adjacent battery cells 10, the first surface 12 of one battery cell 10 is provided with a first welding section 21, and the second surface 13 of the other battery cell 10 is provided with a second welding section 22.

[0058] Thus, when two adjacent battery cells 10 are partially stacked, a stepped structure will appear between the two battery cells 10. Therefore, the solder ribbon 20 is connected to the battery cell 10 by interlacing vertically, so that the solder ribbon 20 is kept at the same height. This can improve the stability of the connection between the solder ribbon 20 and the battery cell 10, and the connection process of the solder ribbon 20 is easy to implement.

[0059] like Figure 6 As shown, the first surface 12 of the left battery cell 10 is provided with a first welding section 21, and the second surface 13 of the right battery cell 10 is provided with a second welding section 22.

[0060] Please see Figure 5 In some embodiments, along the first direction D1, two adjacent solar cells 10 are connected by a plurality of solder ribbons 20, and the plurality of solder ribbons 20 are spaced apart along the second direction D2, which intersects the first direction D1. Thus, the plurality of solder ribbons 20 can improve the overcurrent capacity of the electrical connection between the two solar cells 10, and even if one solder ribbon 20 breaks, the other solder ribbons 20 can still electrically connect the two solar cells 10, improving the reliability of the curved photovoltaic tile 100. In the embodiments of this application, the first direction D1 and the second direction D2 are arranged perpendicularly.

[0061] The photovoltaic module (not shown) according to the embodiments of this application includes multiple curved photovoltaic tiles 100, which are electrically connected. Thus, the electrical connection of multiple curved photovoltaic tiles 100 can increase the power generation of the photovoltaic module.

[0062] In the description of embodiments of this utility model, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0063] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0064] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A curved photovoltaic tile, characterized in that, include: The battery cell includes a first surface and a second surface that are opposite to each other; A curved panel that covers a first surface of the battery cell; A filter layer is stacked on the curved panel and located on one side of the first surface. The filter layer is configured to transmit visible light and block light with wavelengths above 800 nm. The filter layer is disposed on the side surface of the curved panel opposite to the battery cell. The filter layer includes a substrate and a coating attached to the surface of the substrate. The solar cell is a plurality of cells arranged along at least one direction. The curved photovoltaic tile also includes a welding strip, which connects two adjacent solar cells along a first direction. The two adjacent solar cells along the first direction are partially stacked. The welding strip includes a plurality of first welding segments and at least one second welding segment. The first welding segment is connected to a corresponding solar cell. The second welding segment connects two adjacent first welding segments along the first direction. The second welding segment is located between two adjacent solar cells and spans the stacked area of ​​the two adjacent solar cells. The second welding segment is flat. In two adjacent solar cells, the first surface of one solar cell is provided with the first weld section, and the second surface of the other solar cell is provided with the second weld section.

2. The curved photovoltaic tile according to claim 1, characterized in that, The thickness of the filter layer ranges from 0.1 mm to 0.6 mm.

3. The curved photovoltaic tile according to claim 1, characterized in that, The projection of the filter layer onto the battery cell along the thickness direction of the curved panel coincides with the outer contour of the battery cell.

4. The curved photovoltaic tile according to claim 1, characterized in that, The curved photovoltaic panel further includes a backsheet, a first adhesive film layer, and a second adhesive film layer, wherein the filter layer, the curved panel, the first adhesive film layer, the solar cells, the second adhesive film layer, and the backsheet are sequentially stacked; or, The curved panel, the filter layer, the first adhesive film layer, the battery cell, the second adhesive film layer, and the back plate are stacked in sequence.

5. The curved photovoltaic tile according to claim 1, characterized in that, The filter layer is configured to have a light blocking rate of more than 50% in the 800nm~1100nm wavelength band and a light blocking rate of more than 80% in wavelengths above 1100nm.

6. The curved photovoltaic tile according to claim 1, characterized in that, The curved panel is a glass plate, and the side of the curved panel opposite to the battery cell has a smooth surface.

7. A photovoltaic module, characterized in that, It includes multiple curved photovoltaic tiles as described in any one of claims 1-6, wherein the multiple curved photovoltaic tiles are electrically connected.

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