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 plurality of battery pieces, a solder strip and a curved-surface panel, and the plurality of battery pieces are arranged along at least one direction; the welding strip is connected with two adjacent battery pieces along a first direction; the curved panel covers the plurality of battery pieces and is provided with colored stripes, and the colored stripes cover the welding strip along the thickness direction of the curved panel. According to the curved-surface photovoltaic tile provided by the embodiment of the invention, the colored stripes are arranged on the curved-surface panel and cover the welding strip along the thickness direction of the curved-surface panel, so that the appearance consistency of the curved-surface photovoltaic tile is ensured, and the product yield is improved. In addition, the positions of the colored stripes correspond to the welding strips, so that the arrangement positions of the battery pieces can be positioned through the colored stripes.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaics, and more specifically, to a curved photovoltaic tile and a photovoltaic module. Background Art

[0002] Photovoltaic tiles convert solar energy into light energy. To reduce the curvature of individual cells on curved photovoltaic tiles, these tiles use solder ribbons to connect multiple cells to form a single curved tile. However, after cooling and forming, each ribbon is difficult to maintain a consistent shape, and the ribbons can be exposed through the panel, affecting the appearance consistency of the photovoltaic tile product. Utility Model Content

[0003] The embodiments of the present utility model provide a curved photovoltaic tile and a photovoltaic module.

[0004] The curved photovoltaic tile of the embodiment of the present application includes a plurality of solar cells, welding ribbons and a curved panel, wherein the plurality of solar cells are arranged along at least one direction; the welding ribbon connects two adjacent solar cells along a first direction; the curved panel covers the plurality of solar cells, and the curved panel is provided with colored stripes, and the colored stripes cover the welding ribbons along the thickness direction of the curved panel.

[0005] The curved photovoltaic tiles of this embodiment are designed with colored stripes on the curved panel. These stripes cover the soldering ribbons along the thickness of the curved panel, thereby ensuring a consistent appearance and improving product quality. Furthermore, the position of the colored stripes corresponds to the soldering ribbons, allowing them to be used to accurately locate the placement of the solar cells.

[0006] In some embodiments, the width W1 of the welding strip and the width W2 of the colored stripe satisfy: 2≤W2 / W1≤3.

[0007] In some embodiments, the colored stripes are formed on a surface of the curved panel facing the battery cell.

[0008] In certain embodiments, the grayscale value of the colored stripes ranges from 0 to 192.

[0009] In some embodiments, the plurality of battery cells are arranged in a matrix along the first direction and the second direction, the plurality of welding strips are spaced apart along the second direction, the colored stripes extend along the first direction and are spaced apart along the second direction, and the second direction intersects with the first direction.

[0010] In some embodiments, two adjacent battery cells along a first direction are partially stacked, and the welding strip includes a plurality of first welding segments and at least one second welding segment, wherein the first welding segment is connected to a corresponding battery cell, and the second welding segment connects two adjacent first welding segments along the first direction, and the second welding segment is located between the two adjacent battery cells and spans the stacking area of ​​the two adjacent battery cells, and the second welding segment is flat.

[0011] In some embodiments, the battery cell includes a first surface and a second surface facing each other. In two adjacent battery cells, the first surface of one battery cell is provided with the first welding section, and the second surface of the other battery cell is provided with the first welding section.

[0012] In certain embodiments, a projection of the colored stripe on the battery cell is located within an outer contour of the battery cell.

[0013] In some embodiments, the curved photovoltaic tile further includes a back plate, and the solar cell is disposed between the back plate and the curved panel.

[0014] The photovoltaic assembly of the embodiment of the present application includes a plurality of the curved photovoltaic tiles described above, and the plurality of the curved photovoltaic tiles are electrically connected.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments with reference to the following drawings, in which:

[0017] Figure 1 This is a three-dimensional schematic diagram of a curved photovoltaic tile according to an embodiment of the present utility model;

[0018] Figure 2 is a schematic diagram of a curved panel in a flattened state according to an embodiment of the present invention;

[0019] Figure 3 This is a schematic diagram of the projection of the curved photovoltaic tile on a plane according to an embodiment of the present utility model;

[0020] Figure 4 This is a partial schematic diagram of a curved photovoltaic tile according to an embodiment of the present utility model;

[0021] Figure 5 This is a partial structural diagram of a curved photovoltaic tile according to an embodiment of the present utility model;

[0022] Figure 6It is a side view of a curved photovoltaic tile according to an embodiment of the present invention.

[0023] Description of reference numerals:

[0024] 100-curved photovoltaic tile; 10-cell; 11-stacking area; 12-first surface; 13-second surface; 20-welding strip; 21-first welding section; 22-second welding section; 30-backboard; 40-curved panel; 41-colored stripes; D1-first direction; D2-second direction. DETAILED DESCRIPTION

[0025] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be understood as limiting the present invention.

[0026] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0027] The disclosure below provides many different embodiments or examples for realizing different structures of the present invention. In order to simplify the disclosure of the present invention, the components and settings of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. In addition, the present invention may repeat reference numbers and / or reference letters in different examples. Such repetition is for the purpose of simplicity and clarity and does not in itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides examples of various specific processes and materials, but a person of ordinary skill in the art may be aware of the application of other processes and / or the use of other materials.

[0028] In related technologies, photovoltaic tiles consist of cells and solder ribbons that electrically connect the cells in series. However, the ribbons are typically a striking silver-white color, and the appearance of each ribbon is difficult to maintain uniformly. The tiles also include a transparent panel through which the ribbons are exposed, resulting in a less uniform appearance.

[0029] See also Figure 1-Figure 3 The curved photovoltaic tile 100 of the embodiment of the present application includes a plurality of cells 10, a welding ribbon 20 and a curved panel 40, wherein the plurality of cells 10 are arranged along at least one direction; the welding ribbon 20 connects two adjacent cells 10 along a first direction D1; the curved panel 40 covers the plurality of cells 10, and the curved panel 40 is provided with a colored stripe 41, which covers the welding ribbon 20 along the thickness direction of the curved panel 40.

[0030] The curved photovoltaic tile 100 of the present embodiment is provided with colored stripes 41 on the curved panel 40. The colored stripes 41 cover the soldering ribbon 20 along the thickness of the curved panel 40, thereby ensuring the appearance consistency of the curved photovoltaic tile 100 and improving product quality. In addition, the position of the colored stripes 41 corresponds to the soldering ribbon 20, so the colored stripes 41 can be used to locate the arrangement of the solar cells 10.

[0031] Specifically, the curved photovoltaic tile 100 is a photovoltaic product with a curved outer surface. The curved photovoltaic tile 100 has a large light-receiving area and is not prone to water accumulation. It can be used in scenarios such as rooftops and outdoor flat ground. The battery cell 10 can convert light energy into electrical energy. The battery cell 10 can be a battery cell 10 manufactured using Perc (Passivated Emitter Rear Cell) technology, or a battery cell 10 manufactured using Topcon (Tunnel Oxide Passivated Contact) technology or HJT (Heterojunction with Intrinsic Thin-film) technology. The battery cell 10 can be curved after pressing.

[0032] The plurality of battery cells 10 can be arranged in a flat manner. The number of battery cells 10 can be set according to specific needs, for example, 2, 3, 10, 50, etc.

[0033] The soldering ribbon 20 is used to electrically connect the plurality of battery cells 10 . The soldering ribbon 20 may be made of a conductive material such as silver, tin, or an alloy to improve the conductivity of the soldering ribbon 20 .

[0034] The curved panel 40 may be made of a light-transmitting material, so that light can pass through the curved panel 40 and reach the battery cell 1010. The curved panel 40 may have crests and troughs of the curve.

[0035] See also Figure 4In some embodiments, the width W1 of the soldering ribbon 20 and the width W2 of the colored stripe 41 satisfy the following relationship: 2≤W2 / W1≤3. Thus, the width W2 of the colored stripe 41 is 2-3 times the width W1 of the soldering ribbon 20, effectively shielding the soldering ribbon 20 while reducing the area occupied by the colored stripe 41 on the curved panel 40, thereby ensuring the light transmittance of the curved panel 40.

[0036] Specifically, the width W2 of the colored stripe 41 is greater than the width W1 of the welding rod, and W2 / W1 can be 2, 2.1, 2.4, 2.63, 2.7, 2.9, or 3.

[0037] In some embodiments, the colored stripes 41 are formed on the surface of the curved panel 40 facing the solar cell 10. In this way, the colored stripes 41 are not easily corroded by the external environment, which is conducive to maintaining the appearance consistency over the service life of the curved photovoltaic tile 100.

[0038] Specifically, one side of the curved panel 40, along its thickness, is pressed against the solar cell 10, while the other side faces away from the solar cell 10 and toward the light source. Curved photovoltaic tiles 100 are typically used outdoors. The colored stripes 41 are formed on the side of the curved panel 40 facing the solar cell 10, reducing erosion from wind and rain and effectively slowing down aging issues like fading and peeling of the colored stripes 41.

[0039] The colored stripes 41 can be formed on the surface of the curved panel 40 facing the battery cell 10 by printing, pasting, coating, deposition or other processes. For example, the colored stripes 41 are printed on the curved panel 40 by silk screen printing.

[0040] See also Figure 1 In some embodiments, the grayscale value of the colored stripe 41 ranges from 0 to 192 (excluding the endpoints). Thus, the color of the colored stripe 41 is between black and silver, effectively obscuring the silver-white welding rod. Specifically, the grayscale value of the colored stripe 41 can be 12, 64, 128, 156, etc. For example, the grayscale value of the colored stripe 41 is 128, and the color of the colored stripe 41 is neutral gray.

[0041] See also Figure 3 In some embodiments, a plurality of battery cells 10 are arranged in a matrix along a first direction D1 and a second direction D2, a plurality of welding strips 20 are arranged at intervals along the second direction D2, and the colored stripes 41 extend along the first direction D1 and are arranged at intervals along the second direction D2, and the second direction D2 intersects with the first direction D1.

[0042] In this way, by arranging multiple battery cells 10 in a matrix along the first direction D1 and the second direction D2, and by spaced apart multiple welding strips 20 along the second direction D2, the connection stability between every two adjacent battery cells 10 along the first direction D1 is improved, thereby facilitating the overall structural stability of the connection of the multiple battery cells 10.

[0043] Specifically, combined Figure 1 Multiple cells 10 are arranged in a matrix and then shaped to form a curved battery. The curved battery can sequentially form peaks and valleys along the first direction D1. Along the first direction D1, each pair of adjacent cells 10 can be connected by multiple welding rods, and the welding rods on one group of cells 10 can be connected to the welding rods on the two adjacent cells 10 in the previous and next groups. Each colored stripe 41 covers a corresponding welding rod. Along the first direction D1, the colored stripes 41 can extend continuously from the first cell 10 to the last cell 10. Along the second direction D2, the spacing between the colored stripes 41 matches the spacing between the welding rods.

[0044] See also Figure 5-Figure 6 In some embodiments, two adjacent battery cells 10 are partially stacked along the first direction D1, and the welding ribbon 20 includes multiple 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, and 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 the two adjacent battery cells 10 and spans the stacking area 11 of the two adjacent battery cells 10. The second welding segment 22 is flat.

[0045] In this way, the second welding section 22 is located between two adjacent battery cells 10 and spans the stacking area 11 of the two adjacent battery cells 10, and the second welding section 22 is flat, so that the contact area between the second welding section 22 and the battery cell 10 is increased, reducing the pressure on the battery cell 10, thereby reducing defects such as cracks in the battery cell 10.

[0046] Specifically, the first welding section 21 of the welding ribbon 20 can be welded to the battery cell 10, and the number of the second welding sections 22 is one less than the number of the first welding sections 21. For example, when the number of the first welding sections 21 is two, the number of the second welding sections 22 is one. The first welding section 21 and the second welding section 22 can be an integral structure.

[0047] The stacking region 11 of two adjacent battery cells 10 refers to the region where the two adjacent battery cells 10 have overlapping areas. The second welding segment 22 spans the stacking region 11, meaning that both ends of the second welding segment 22 along the first direction D1 extend outside the stacking 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.

[0048] It should be noted that the surface of the second welding segment 22 with the largest area faces the battery cell 10 or is in contact with the battery cell 10 .

[0049] See also Figure 5-Figure 6 In some embodiments, the battery cell 10 includes a first surface 12 and a second surface 13 facing each other. Among 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 first welding section 21.

[0050] In this way, when two adjacent battery cells 10 are partially stacked, a step structure will appear between the two battery cells 10. Therefore, the soldering ribbon 20 is connected to the battery cell 10 in an up and down interlaced manner, so that the soldering ribbon 20 as a whole is maintained at a same height, which can improve the stability of the connection between the soldering ribbon 20 and the battery cell 10, and the connection process of the soldering ribbon 20 is easy to implement.

[0051] 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 .

[0052] See also Figure 3 In some embodiments, the projection of the colored stripes 41 on the cell 10 is located within the outer contour of the cell 10. Thus, the position of the cell 10 is determined by the correspondence between the colored stripes 41 and the soldering ribbons 20 on the cell 10, thereby improving the positioning consistency of the cell 10 and facilitating the positioning operation.

[0053] Specifically, the welding rod is located within the projection range of the corresponding colored stripes 41 on the battery cell 10 along the thickness direction of the curved panel 40, and the projections of the multiple colored stripes 41 on the battery cell 10 are located within the overall outer contour formed by connecting the multiple battery cells 10.

[0054] For example, multiple solar cells 10 are arranged in a matrix along a first direction D1 and a second direction D2. Two adjacent solar cells 10 along the first direction D1 are connected by solder ribbons 20. The first and second directions D2 are perpendicular to each other, and the overall outer contour of the connected solar cells 10 is rectangular. The solder ribbons 20 and the colored stripes 41 are arranged in a one-to-one correspondence. The colored stripes 41 extend along the first direction D1 and are spaced apart along the second direction D2. The length of the colored stripes 41 along the first direction D1 is greater than or equal to the length of the solder ribbon 20 it covers, and less than or equal to the overall outer contour of the multiple solar cells 10 along the first direction D1. The first and last colored stripes 41 along the second direction D2 are both located within the edge of the solar cell 10 in the second direction D2.

[0055] Please refer again Figure 1In some embodiments, the curved photovoltaic tile 100 further includes a backsheet 30, and the cell 10 is disposed between the backsheet 30 and the curved panel 40. In this way, the backsheet 30 and the curved panel can protect the cell 10 and increase the life of the curved photovoltaic tile 100.

[0056] Specifically, the back plate 30 can be made of metal or polymer material. The back plate 30 has a curved shape that matches the curvature of the curved panel.

[0057] The photovoltaic module (not shown) of the embodiment of the present application includes a plurality of curved photovoltaic tiles 100, which are electrically connected to each other. In this way, the electrical connection of the plurality of curved photovoltaic tiles 100 can increase the power generation efficiency of the photovoltaic module.

[0058] In the description of the embodiments of the present invention, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the described features. In the description of the embodiments of the present invention, "plurality" means two or more, unless otherwise specifically specified.

[0059] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative descriptions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0060] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A curved photovoltaic tile, characterized in that: include: A plurality of battery cells, wherein the plurality of battery cells are arranged along at least one direction; a welding ribbon, the welding ribbon connecting two adjacent battery cells along a first direction; A curved panel is provided, the curved panel covering the plurality of battery cells, the curved panel is provided with colored stripes, and the colored stripes cover the welding strips along the thickness direction of the curved panel.

2. The curved photovoltaic tile according to claim 1, characterized in that: The width W1 of the welding strip and the width W2 of the colored stripe satisfy: 2≤W2 / W1≤3.

3. The curved photovoltaic tile according to claim 1, characterized in that: The colored stripes are formed on a surface of the curved panel facing the battery cell.

4. The curved photovoltaic tile according to claim 1, characterized in that: The grayscale value of the colored stripes ranges from 0 to 192.

5. The curved photovoltaic tile according to claim 1, characterized in that: The plurality of battery cells are arranged in a matrix along a first direction and a second direction, the plurality of welding strips are spaced apart along the second direction, the colored stripes extend along the first direction and are spaced apart along the second direction, and the second direction intersects the first direction.

6. The curved photovoltaic tile according to claim 5, characterized in that: Two adjacent battery cells along a first direction are partially stacked, and the welding strip includes multiple first welding segments and at least one second welding segment. The first welding segment is connected to a corresponding battery cell, and the second welding segment connects two adjacent first welding segments along the first direction. The second welding segment is located between the two adjacent battery cells and spans the stacking area of ​​the two adjacent battery cells. The second welding segment is flat.

7. The curved photovoltaic tile according to claim 6, characterized in that: The battery cell includes a first surface and a second surface facing each other. Among two adjacent battery cells, the first surface of one of the battery cells is provided with the first welding section, and the second surface of the other battery cell is provided with the first welding section.

8. The curved photovoltaic tile according to claim 1, characterized in that: The projection of the colored stripes on the battery cell is located within the outer contour of the battery cell.

9. The curved photovoltaic tile according to claim 1, characterized in that: The curved photovoltaic tile further includes a back plate, and the solar cell is arranged between the back plate and the curved panel.

10. A photovoltaic module, characterized in that: The invention comprises a plurality of curved photovoltaic tiles according to any one of claims 1 to 9, wherein the plurality of curved photovoltaic tiles are electrically connected.

Images