Curved photovoltaic tile and photovoltaic module

Abstract

A curved photovoltaic tile (100) and a photovoltaic module. The curved photovoltaic tile (100) comprises a front plate (40), a plurality of cells (10), connecting lines (20), and a backsheet (30). The plurality of cells (10) are arranged along at least one direction. The connecting lines (20) are disposed inside of the cells (10). The connecting lines (20) are electrically connected to the cells (10). The curved photovoltaic tile (100) is provided with soldering portions (11) connected to adjacent cells (10). The soldering portions (11) are connected to end portions of the connecting lines (20). The cells (10) are located between the front plate (40) and the backsheet (30). The front plate (40), the cells (10), and the backsheet (30) are curved.

Description

Curved photovoltaic tiles and photovoltaic modules

[0001] Priority information

[0002] This application claims priority and benefits to patent application No. 202411580821.7, filed with the China National Intellectual Property Administration on November 6, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of photovoltaic technology, and in particular to a curved photovoltaic tile and a photovoltaic module. Background Technology

[0004] With the increasing prominence of severe issues such as energy shortages and climate emissions, countries around the world are paying more and more attention to clean, pollution-free renewable energy sources. Solar energy is an inexhaustible and green energy source. Currently, photovoltaic power generation has a wide range of applications, and building-integrated photovoltaics (BIPV) is gradually becoming a trend, with residential rooftops being the main application area for distributed photovoltaics. Typically, photovoltaic tiles consist of multiple photovoltaic cell strings, where each string consists of multiple cells connected in series. However, the inventors realized that desoldering can easily occur between cells connected in series. Summary of the Invention

[0005] This application aims to address at least one of the technical problems existing in the prior art or related technologies.

[0006] Therefore, this application proposes a curved photovoltaic tile, which includes a panel, multiple solar cells, connecting lines and a back sheet. The multiple solar cells are arranged in at least one direction, the connecting lines are disposed inside the solar cells and are electrically connected to the solar cells. The curved photovoltaic tile has a welded part that connects to adjacent solar cells, and the welded part is connected to the end of the connecting line. The solar cells are located between the panel and the back sheet, and the panel, solar cells and back sheet are curved.

[0007] In the curved photovoltaic tile of this application embodiment, the connecting wire is set inside the solar cell and electrically connected to the solar cell. The two adjacent solar cells can be connected by welding the ends of the connecting wire inside the two adjacent solar cells, which reduces the number of welding points, thereby reducing the welding difficulty and the probability of welding failure, and improving the stability of the solar cell connection.

[0008] This application proposes a photovoltaic module comprising a plurality of the curved photovoltaic tiles described above, wherein the plurality of curved photovoltaic tiles are electrically connected.

[0009] Additional aspects and advantages of this application 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 this application. Attached Figure Description

[0010] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, wherein:

[0011] Figure 1 is a three-dimensional schematic diagram of the curved photovoltaic tile according to an embodiment of this application;

[0012] Figure 2 is a partial structural schematic diagram of a curved photovoltaic tile according to one embodiment of this application;

[0013] Figure 3 is a partial structural schematic diagram of a curved photovoltaic tile according to another embodiment of this application;

[0014] Figure 4 is a cross-sectional schematic diagram of the battery cell according to an embodiment of this application.

[0015] Explanation of reference numerals in the attached drawings: 100, curved photovoltaic tile; 10, solar cell; 11, welding part; 12, connecting hole; 13, connection point; 20, connecting line; 30, back sheet; 40, front panel; 50, encapsulating film layer; D1, first direction; D2, second direction. Detailed Implementation

[0016] To better understand the above-mentioned objectives, features, and advantages of this application, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0017] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.

[0018] Please refer to Figures 1-4. The curved photovoltaic tile 100 of this application embodiment includes a plurality of solar cells 10, connecting lines 20, a back plate 30, and a front plate 40. The plurality of solar cells 10 are arranged in at least one direction. The connecting lines 20 are disposed inside the solar cells 10 and are electrically connected to the solar cells 10. The curved photovoltaic tile 100 has a welding part 11 that is connected to the adjacent solar cells 10. The welding part 11 is connected to the end of the connecting line 20. The solar cells 10 are located between the front plate 40 and the back plate 30. The front plate 40, solar cells 10, and back plate 30 are curved.

[0019] In the curved photovoltaic tile 100 of this application embodiment, the connecting wire 20 is disposed inside the solar cell 10 and electrically connected to the solar cell 10. The two adjacent solar cells 10 can be connected by welding the ends of the connecting wire 20 inside the two adjacent solar cells 10, which reduces the number of welding points, thereby reducing the welding difficulty and the probability of welding failure, and improving the stability of the connection of the solar cells 10.

[0020] 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 (PassivateT Emitter Rear Cell) technology or Topcon (Tunnel OxiTe PassivateT Contact) technology. The solar cell 10 can be curved after pressing.

[0021] The solar cell 10 can be a complete solar cell 10 or a sliced ​​solar cell 10 formed by cutting a complete solar cell 10. For example, a laser slicing process can be used to cut a complete solar cell 10 into 2, 3, 4, 5 or more sliced ​​solar cells 10, and each sliced ​​solar cell 10 can be normally welded. Multiple solar cells 10 can be arranged in a flat arrangement, meaning that multiple solar cells 10 can be arranged along their own length direction and / or width direction. In one embodiment, multiple solar cells 10 are arranged along their own length direction. In another embodiment, multiple solar cells 10 are arranged along their own width direction. In yet another embodiment, multiple solar cells 10 are arranged along their own length direction and width direction.

[0022] The backsheet 30 and the front panel 40 protect the solar cells 10 and improve the lifespan of the curved photovoltaic tile 100. The backsheet 30 can be made of metal or polymer material, and the front panel 40 can be made of light-transmitting material, allowing light to pass through the front panel 40 and reach the solar cells 10. The front panel 40, solar cells 10, and backsheet 30 are all curved, and the front panel 40, solar cells 10, and backsheet 30 can have peaks and troughs on their curved surfaces.

[0023] The connecting wire 20 can be made of conductive materials such as silver, copper, tin, or alloys to improve its conductivity, thereby achieving electrical connection between the connecting wire 20 and the solar cell 10. The connecting wire 20 can be installed inside the solar cell 10 by welding or other methods. The connecting wire 20 can be flat to increase the contact area between the connecting wire 20 and the solar cell 10, reducing the pressure on the solar cell 10 and thus reducing defects such as cracks. The welding part 11 can be the surface or solid portion of the solar cell 10 used for connecting the connecting wires 20 of adjacent solar cells 10.

[0024] Referring to Figure 4, in some embodiments, the battery cell 10 is formed with a connection hole 12, and the connection wire 20 is connected to the welding part 11 through the connection hole 12.

[0025] Thus, the connecting wires 20 of two adjacent battery cells 10 can be easily welded together through the connecting hole 12 and the welding part 11.

[0026] Specifically, the connection hole 12 can extend from the inside of the battery cell 10 along the thickness direction of the battery cell 10 to the welding part 11. The connection wire 20 extends through the connection hole 12 to the welding part 11. By injecting silver paste into the connection hole 12 and the welding part 11, the connection wires 20 of two adjacent battery cells 10 can be connected to achieve electrical connection between two adjacent battery cells 10.

[0027] Depending on the distance between the ends of the connecting lines 20 of two adjacent solar cells 10, the silver paste can be formed in a strip or dot shape. That is, when the distance between the connecting holes 12 of two adjacent solar cells 10 is small, the silver paste can form a solder joint, and when the distance between the connecting holes 12 of two adjacent solar cells 10 is large, the silver paste can form a solder strip.

[0028] The number of connecting holes 12 can be twice the number of connecting wires 20. For example, if there are 8 connecting wires 20, there are 16 connecting holes 12, and each connecting hole 12 corresponds to the end of a connecting wire 20.

[0029] Please refer to Figure 2. In some embodiments, the battery cells 10 are connected in series via connecting lines 20 along the first direction D1.

[0030] Thus, connecting multiple solar cells 10 in series can improve the efficiency of the curved photovoltaic tile 100, thereby increasing the utilization rate of solar energy.

[0031] Specifically, the first direction D1 can be the length direction or the width direction of the solar cell 10. In one embodiment, the solar cell 10 is a sliced ​​solar cell 10, and the first direction D1 is the width direction of the sliced ​​solar cell 10. When manufacturing curved photovoltaic tiles 100, the more sliced ​​solar cells 10 are obtained by cutting a complete solar cell 10, the smaller the size of the sliced ​​solar cell 10 in the first direction D1, and the smaller the deformation of the sliced ​​solar cell 10 during shaping, thereby reducing the risk of microcracks in the sliced ​​solar cell 10.

[0032] Please refer to Figures 2 and 4. In some embodiments, the welding part 11 is in multiple groups, and each group of welding parts 11 includes two welding parts 11. The two welding parts 11 are arranged at intervals along the first direction D1. The multiple groups of welding parts 11 are arranged along the second direction D2. Each group of welding parts 11 is connected by a connecting line 20. The second direction D2 intersects the first direction D1.

[0033] Thus, the connecting line 20 connects each group of welding parts 11 along the first direction D1, so that the connecting line 20 can connect two adjacent battery cells 10 in series along the first direction D1.

[0034] In this embodiment of the application, the first direction D1 and the second direction D2 are arranged perpendicularly. The first direction D1 can be the length direction of the battery cell 10, and the second direction D2 can be the width direction of the battery cell 10; alternatively, the first direction D1 can be the width direction of the battery cell 10, and the second direction D2 can be the length direction of the battery cell 10.

[0035] The connecting wires 20 can be arranged in a straight line inside the battery cell 10, with each end of the connecting wire 20 connected to one of the two welding portions 11 of each group of welding portions 11. In three adjacent battery cells 10, the connecting wire 20 of the second battery cell 10 can be connected to the connecting wire 20 of the first battery cell 10 or to the connecting wire 20 of the third battery cell 10 through one end.

[0036] Please refer to Figures 3 and 4. In some embodiments, the welding part 11 is in multiple groups, and each group of welding parts 11 includes two welding parts 11. The two welding parts 11 are arranged at intervals along the first direction D1. The multiple groups of welding parts 11 are arranged along the second direction D2. The connecting line 20 connects the two adjacent groups of welding parts 11 end to end. The second direction D2 intersects the first direction D1.

[0037] In this way, the connecting line 20 can connect two adjacent battery cells 10 in series along the first direction D1, and at the same time, it can increase the contact area between the connecting line 20 and the battery cell 10, thereby improving the conductivity of the connecting line 20.

[0038] Specifically, the connecting lines 20 can be distributed in an "S" or "Z" shape inside the battery cell 10, with both ends of the connecting lines 20 connected to two diagonally arranged welding parts 11 in two adjacent sets of welding parts 11. The connecting lines 20 of two adjacent battery cells 10 along the first direction D1 can be symmetrically distributed, thereby realizing the series connection of the battery cells 10 along the first direction D1. In three adjacent battery cells 10, the two ends of the connecting line 20 of the second battery cell 10 can be connected to the connecting lines 20 of the first battery cell 10 and the connecting lines 20 of the third battery cell 10, respectively.

[0039] Referring to Figure 4, in some embodiments, the welded portion 11 is located at the end of the battery cell 10 along the first direction D1.

[0040] Thus, the connection hole 12 is formed at the end of the battery cell 10, which can reduce the distance between the connection lines 20 of two adjacent battery cells 10, thereby reducing the welding difficulty.

[0041] Specifically, the welding part 11 may be the surface between the connection hole 12 and the side of the battery cell 10 along the first direction D1 near the connection hole 12, or a solid including its surface.

[0042] Please refer to 2. In some embodiments, along the first direction D1, two adjacent battery cells 10 are connected by a plurality of connecting lines 20, and the plurality of connecting lines 20 are spaced apart along the second direction D2, which intersects the first direction D1.

[0043] Thus, by connecting two adjacent solar cells 10 with multiple connecting lines 20, the overcurrent capacity of the electrical connection between the two solar cells 10 can be improved, and when one of the connecting lines 20 breaks, the other connecting lines 20 can still electrically connect the two solar cells 10, thereby improving the reliability of the curved photovoltaic tile 100.

[0044] Specifically, the number of connecting lines 20 can be 12, 14, 16, 18, 20, etc. In three adjacent battery cells 10, a portion of the connecting lines 20 of the second battery cell 10 can be connected to the connecting lines 20 of the first battery cell 10, and the remaining connecting lines 20 of the second battery cell 10 can be connected to the connecting lines 20 of the third battery cell 10. Alternatively, one end of the connecting line 20 of the second battery cell 10 can be connected to the connecting line 20 of the first battery cell 10, and the other end of the connecting line 20 of the second battery cell 10 can be connected to the connecting line 20 of the third battery cell 10. The arrangement direction of the multiple connecting lines 20 can be perpendicular to the arrangement direction of the multiple battery cells 10.

[0045] Please refer to Figures 2-4. In some embodiments, the curved photovoltaic tile 100 is formed with a plurality of connection points 13, and the connecting line 20 is electrically connected to the solar cell 10 through the connection points 13 to divide the solar cell 10 into a plurality of parts.

[0046] In this way, multiple connection points 13 can increase the connection stability between the connection line 20 and the solar cell 10. At the same time, multiple connection points 13 divide the solar cell 10 into multiple parts, so that when one part of the solar cell 10 fails, the overall power generation of the solar cell 10 will not be affected.

[0047] Specifically, the connection point 13 can be a solder joint formed by silver paste. The number of connection points 13 can be 2, 3, 4, 5, 6 or more. The dimensions of the multiple connection points 13 can be the same or different. In one embodiment, the dimensions of the connection points 13 located at both ends of the connection line 20 are larger than the dimensions of the connection points 13 located in the middle part of the connection line 20. The shape of the connection point 13 includes one or more combinations of rectangle, rhombus, circle, and ellipse. The shapes of the multiple connection points 13 can be the same or different.

[0048] Referring to Figure 1, in some embodiments, the curved photovoltaic tile 100 further includes an encapsulating film layer 50, which is disposed between the back sheet 30 and the solar cell 10 and / or between the panel 40 and the solar cell 10.

[0049] Thus, the backplate 30 and the battery cell 10, and / or the panel 40 and the battery cell 10, can be connected and fixed by the encapsulating film layer 50, achieving lamination encapsulation between the backplate 30 and the battery cell 10 and / or the panel 40 and the battery cell 10, forming a stable and reliable structure. In addition, the encapsulating film layer 50 can act as a buffer between the backplate 30 and the battery cell 10 and / or the panel 40 and the battery cell 10, preventing cell breakage due to lamination.

[0050] Specifically, an encapsulating film layer 50 can be provided between the backsheet 30 and the battery cell 10, or between the panel 40 and the battery cell 10, or both the backsheet 30 and the battery cell 10 and the panel 40 and the battery cell 10 can have an encapsulating film layer 50. The encapsulating film layer 50 can be made of EVA, POE, or EPE material. The material of the encapsulating film layer 50 between the backsheet 30 and the battery cell 10 can be the same as or different from the material of the encapsulating film layer 50 between the panel 40 and the battery cell 10.

[0051] 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.

[0052] 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., refer to specific features, structures, materials, or characteristics described in connection with the described embodiment or example, which are included in at least one embodiment or example of this application. 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.

[0053] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A curved photovoltaic tile, wherein, include: panel; Multiple solar cells, wherein the multiple solar cells are arranged along at least one direction; A connecting line is disposed inside the solar cell and is electrically connected to the solar cell. The curved photovoltaic tile has a welded portion that connects to the adjacent solar cell, and the welded portion is connected to the end of the connecting line. The back panel, wherein the battery cell is located between the front panel and the back panel, and the front panel, the battery cell, and the back panel are all curved.

2. The curved photovoltaic tile according to claim 1, wherein, The battery cell has a connection hole, and the connecting wire is connected to the welding part through the connection hole.

3. The curved photovoltaic tile according to claim 1 or 2, wherein, Along the first direction, the battery cells are connected in series via the connecting line.

4. The curved photovoltaic tile according to claim 3, wherein, The welding parts are in multiple groups, and each group of welding parts includes two welding parts. The two welding parts are arranged at intervals along the first direction. The multiple groups of welding parts are arranged along the second direction. Each group of welding parts is connected by a connecting line. The second direction intersects the first direction.

5. The curved photovoltaic tile according to claim 3, wherein, The welding parts are in multiple groups, and each group of welding parts includes two welding parts. The two welding parts are arranged at intervals along the first direction. The multiple groups of welding parts are arranged along the second direction. The connecting line connects two adjacent groups of welding parts end to end. The second direction intersects the first direction.

6. The curved photovoltaic tile according to any one of claims 3-5, wherein, The welded portion is located at the end of the battery cell along the first direction.

7. The curved photovoltaic tile according to any one of claims 3-6, wherein, Along the first direction, two adjacent battery cells are connected by a plurality of connecting lines, and the plurality of connecting lines are spaced apart along a second direction, which intersects the first direction.

8. The curved photovoltaic tile according to any one of claims 1-7, wherein, The curved photovoltaic tile has multiple connection points, and the connecting lines are electrically connected to the solar cell through the connection points to divide the solar cell into multiple parts.

9. The curved photovoltaic tile according to any one of claims 1-8, wherein, The curved photovoltaic tile also includes an encapsulating film layer, which is disposed between the back sheet and the solar cell and / or between the panel and the solar cell.

10. The curved photovoltaic tile according to any one of claims 1-9, wherein, The battery cell is a complete battery cell.

11. The curved photovoltaic tile according to any one of claims 1-9, wherein, The battery cell is a sliced ​​battery cell.

12. The curved photovoltaic tile according to any one of claims 1-10, wherein, The panel is made of a light-transmitting material.

13. The curved photovoltaic tile according to any one of claims 1-11, wherein, The connecting wire is made of conductive material.

14. A photovoltaic module, wherein, Includes multiple curved photovoltaic tiles, the multiple curved photovoltaic tiles are electrically connected, the curved photovoltaic tiles include: panel; Multiple solar cells, wherein the multiple solar cells are arranged along at least one direction; A connecting line is disposed inside the solar cell and is electrically connected to the solar cell. The curved photovoltaic tile has a welded portion that connects to the adjacent solar cell, and the welded portion is connected to the end of the connecting line. The back panel, wherein the battery cell is located between the front panel and the back panel, and the front panel, the battery cell, and the back panel are all curved.

15. The photovoltaic module according to claim 14, wherein, The battery cell has a connection hole, and the connecting wire is connected to the welding part through the connection hole.

16. The photovoltaic module according to claim 14 or 15, wherein, The curved photovoltaic tile also includes an encapsulating film layer, which is disposed between the back sheet and the solar cell and / or between the panel and the solar cell.

17. The photovoltaic module according to any one of claims 14-16, wherein, The battery cell is a complete battery cell.

18. The photovoltaic module according to any one of claims 14-16, wherein, The battery cell is a sliced ​​battery cell.

19. The photovoltaic module according to any one of claims 14-18, wherein, The panel is made of a light-transmitting material.

20. The photovoltaic module according to any one of claims 14-19, wherein, The connecting wire is made of conductive material.

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