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 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 panel covers the plurality of battery pieces and the welding strip, the panel comprises an outer surface and an inner surface, the inner surface faces the battery pieces, the welding strip is provided with a reflective surface, and the reflective surface is used for reflecting light which is vertical to the panel and is incident to the welding strip to the inner surface of the panel and then reflecting the light to the battery pieces by the inner surface. According to the curved-surface photovoltaic tile provided by the embodiment of the invention, the reflective surface of the solder strip reflects the light which is vertical to the panel and is incident to the solder strip to the inner surface of the panel, and then the light is reflected to the battery piece by the inner surface, so that the adverse effect possibly brought by the light reflected by the solder strip to the outside of the curved-surface photovoltaic tile can be reduced, and the power generation efficiency of the battery piece can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to photovoltaic technology field more specifically, relate to a kind of curved photovoltaic tile and photovoltaic module. BACKGROUND

[0002] Photovoltaic tile is the equipment that solar energy is converted into light energy. Photovoltaic tile includes multiple cell pieces, generally, cell piece is connected by welding band, welding band is made of material containing silver, and welding band is easy to reflect light to photovoltaic tile outside again. When photovoltaic tile is installed on roof, the light reflected by photovoltaic tile can bring adverse effect. SUMMARY

[0003] The utility model embodiment provides a kind of curved photovoltaic tile and photovoltaic module.

[0004] The curved photovoltaic tile of the application embodiment includes multiple cell pieces, welding band and panel, multiple the cell pieces are arranged along at least one direction;The welding band connects two adjacent the cell pieces along the first direction, and the panel covers multiple the cell pieces and the welding band, wherein the panel includes outer surface and inner surface, the inner surface is towards the cell piece, the welding band is equipped with reflective surface, and the reflective surface is used to reflect the light, which is perpendicular to the panel and incident to the welding band, to the inner surface of the panel after being reflected to the inner surface of the panel.

[0005] In the curved photovoltaic tile of the application embodiment, the reflective surface of welding band reflects the light, which is perpendicular to the panel and incident to the welding band, to the inner surface of the panel after being reflected to the inner surface of the panel, so that the adverse effect that welding band can bring to the light reflected to curved photovoltaic tile outside can be reduced, and the power generation efficiency of cell piece can be improved.

[0006] In certain embodiments, the welding band is formed with groove with opening towards the panel, and the side surface of the groove forms the reflective surface.

[0007] In certain embodiments, the cross section of the groove is V-shaped.

[0008] In certain embodiments, the number of reflective surfaces is multiple along the length direction perpendicular to the welding band, and multiple the reflective surfaces are sequentially arranged.

[0009] In some embodiments, the solder strip comprises a plurality of first solder segments and at least one second solder segment, the first solder segments are connected to corresponding one of the battery pieces, the length of the first solder segments is greater than the length of the second solder segments, the second solder segments connect two adjacent first solder segments in the first direction, the second solder segments are located between two adjacent battery pieces, the battery pieces comprise first surfaces and second surfaces opposite to each other, in the two adjacent battery pieces, the first surface of one of the battery pieces is provided with the first solder segments, and the second surface of the other of the battery pieces is provided with the first solder segments.

[0010] In some embodiments, the second solder segment is flat, and a surface with the largest area of the second solder segment faces the battery piece.

[0011] In some embodiments, the width of the first solder segment is W1, and the width of the second solder segment is W2, wherein 2≤W2 / W1≤3.

[0012] In some embodiments, the height of the first solder segment is H1, and the height of the second solder segment is H2, wherein 2≤H1 / H2≤5.

[0013] In some embodiments, the width of the second solder segment is W2, and the height of the second solder segment is H2, wherein 3≤W2 / H2≤14.

[0014] The photovoltaic module of the embodiments of the present application comprises a plurality of the above-mentioned curved photovoltaic tiles, and the plurality of the curved photovoltaic tiles are electrically connected.

[0015] Additional aspects and advantages of the present application will be made apparent from the following description of embodiments of the present application, taken in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0016] The above and / or additional aspects and advantages of the present application will become apparent from and will be elucidated with respect to the embodiments described hereinafter, with reference to the accompanying drawings.

[0017] Figure 1 is a schematic diagram of a curved photovoltaic tile according to an embodiment of the present application;

[0018] Figure 2 is a schematic diagram of a partial structure of a curved photovoltaic tile according to an embodiment of the present application;

[0019] Figure 3 is a schematic diagram of a partial exploded view of a curved photovoltaic tile according to an embodiment of the present application;

[0020] Figure 4 is a schematic diagram of a side view of a solder strip of a curved photovoltaic tile according to an embodiment of the present application;

[0021] Figure 5 is a side view of a curved photovoltaic tile according to an embodiment of the present application;

[0022] Figure 6 is a partial view of a solder strip according to an embodiment of the present application;

[0023] Figure 7 is a partial structure view of a curved photovoltaic tile according to an embodiment of the present application;

[0024] Figure 8 is a side view of a curved photovoltaic tile according to an embodiment of the present application.

[0025] BRIEF DESCRIPTION OF DRAWINGS

[0026] 100 - curved photovoltaic tile; 10 - cell; 11 - laminated area; 12 - first surface; 13 - second surface; 20 - solder strip; 21 - first soldering section; 22 - second soldering section; 201 - reflective surface; 202 - groove; 30 - panel; 31 - outer surface; 32 - inner surface; 40 - backboard; D1 - first direction; D2 - second direction. DETAILED DESCRIPTION

[0027] The embodiments of the present application will be described in detail below with reference to the drawings, in which the same or similar components are denoted by the same reference numerals, and therefore the description will be given only with respect to the differences between the embodiments. The embodiments described below are examples for explaining the present application, and should not be construed as limiting the present application.

[0028] In the present application, unless specifically defined otherwise or limited, "on" of a first feature on a second feature can include that the first and second features are directly contacted, or that the first and second features are not directly contacted but are contacted through another feature between them. Also, "on", "above" and "on top of" of a first feature on a second feature include that the first feature is directly above and obliquely above the second feature, or only means that the first feature is higher than the second feature in horizontal height. "Under", "below" and "underneath" of a first feature on a second feature include that the first feature is directly below and obliquely below the second feature, or only means that the first feature is lower than the second feature in horizontal height.

[0029] The disclosure below provides many different embodiments or examples for implementing different structures of the present application. In order to simplify the disclosure of the present application, the components and settings of specific examples are described below. Of course, they are only examples and the purpose is not to limit the present application. In addition, the present application can repeatedly refer to numbers and / or letters in different examples, and such repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the present application provides examples of various specific processes and materials, but those skilled in the art can realize the application of other processes and / or the use of other materials.

[0030] Please refer to Figures 1-4 The curved photovoltaic tile 100 of the embodiment of the present application includes a plurality of cell pieces 10, a solder strip 20 and a panel, the plurality of cell pieces 10 are arranged along at least one direction; the solder strip 20 connects two adjacent cell pieces 10 along a first direction D1, and the panel 30 covers the plurality of cell pieces 10 and the solder strip 20, wherein the panel 30 includes an outer surface 31 and an inner surface 32, the inner surface 32 faces the cell pieces 10, and the solder strip 20 is provided with a reflective surface 201, the reflective surface 201 is used to reflect the light incident perpendicularly to the panel 30 to the solder strip 20 to the inner surface 32 of the panel 30, and the light is reflected by the inner surface 32 to the cell pieces 10.

[0031] In the curved photovoltaic tile 100 of the embodiment of the present application, the reflective surface 201 of the solder strip 20 reflects the light incident perpendicularly to the panel 30 to the solder strip 20 to the inner surface 32 of the panel 30, and the light is reflected by the inner surface 32 to the cell pieces 10, which can reduce the adverse effects of the light reflected by the solder strip 20 to the outside of the curved photovoltaic tile 100, and can also improve the power generation efficiency of the cell pieces 10.

[0032] 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 easy to accumulate water, and can be applied to scenes such as roofs and outdoor flat ground. The cell piece 10 can convert light energy into electrical energy. The cell piece 10 can be a cell piece 10 manufactured by using the Perc (Passivated Emitter Rear Cell) technology, or a cell piece 10 manufactured by using the Topcon (Tunnel Oxide Passivated Contact) technology. The cell piece 10 can be curved after being pressed.

[0033] The plurality of cell pieces 10 can be arranged in a tiled manner. The number of cell pieces 10 can be set according to specific needs, for example, it can be 2, 3, 10, 50, etc.

[0034] The solder strip 20 is used to electrically connect a plurality of battery pieces 10. The solder strip 20 can be made of silver, tin or alloy or other conductive material to improve the conductivity of the solder strip 20. The reflective surface 201 forms an angle with the inner surface 32 of the panel 30, so that the reflective surface 201 can reflect light to the inner surface 32 of the panel 30.

[0035] Referring to Figure 4 In some embodiments, the solder strip 20 is formed with a groove 202 with an opening facing the panel 30, and the side surface of the groove 202 forms the reflective surface 201. In this way, the reflective surface 201 is formed by the groove 202, which is easy to form and can reduce the manufacturing cost of the solder strip 20.

[0036] Referring to Figure 4 In some embodiments, the cross section of the groove 202 is V-shaped. In this way, the groove 202 is easy to form. It should be noted that the cross section of the groove 202 is the surface formed by the solder strip 20 when it is cut by a plane perpendicular to the length direction of the solder strip 20.

[0037] Referring to Figure 4 In some embodiments, the number of reflective surfaces 201 is multiple along a direction perpendicular to the length direction of the solder strip 20, and the multiple reflective surfaces 201 are arranged in sequence. In this way, the multiple reflective surfaces 201 can improve the light reflection efficiency of the solder strip 20 and reduce the reflection of light from the solder strip 20 to the curved photovoltaic tile 100.

[0038] Referring to Figures 5-6 In some embodiments, the solder strip 20 includes a plurality of first solder segments 21 and at least one second solder segment 22, the first solder segment 21 is connected to a corresponding battery piece 10, the length of the first solder segment 21 is greater than the length of the second solder segment 22, the second solder segment 22 connects two adjacent first solder segments 21 in the first direction D1, and the second solder segment 22 is located between the two adjacent battery pieces 10. The battery piece 10 includes a first surface 12 and a second surface 13 opposite to each other, in the two adjacent battery pieces 10, the first surface 12 of one of the battery pieces 10 is provided with the first solder segment 21, and the second surface 13 of the other battery piece 10 is provided with the first solder segment 21.

[0039] In this way, the solder strip 20 is connected to the battery piece 10 in an up-and-down interlaced manner, which can reduce the area of the solder strip 20 on the same side of all the battery pieces 10, thereby reducing light reflection.

[0040] Specifically, the first solder segment 21 of the solder strip 20 can be soldered to the battery piece 10, and the number of second solder segments 22 is one less than the number of first solder segments 21, for example, when the number of first solder segments 21 is two, the number of second solder segments 22 is one. The first solder segment 21 and the second solder segment 22 can be an integral structure.

[0041] like Figure 5 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.

[0042] Please see Figure 5 and Figure 6 In some embodiments, the second welding segment 22 is flat. The surface with the largest area of ​​the second welding segment 22 faces the battery cell 10. In this way, the contact area between the second welding segment 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.

[0043] like Figure 2 and Figure 3 As shown, in some embodiments, two adjacent battery cells 10 are partially stacked along the first direction D1, and a second welding segment 22 spans the stacked area 11 of the two adjacent battery cells 10. The stacked area 11 of the two adjacent battery cells 10 refers to the area where the two adjacent battery cells 10 have overlapping areas. The second welding segment 22 spans the stacked area 11, meaning that the ends of the second welding segment 22 along the first direction D1 extend beyond the stacked area 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.

[0044] like Figure 7 and Figure 8 As shown, in some embodiments, two adjacent battery cells 10 are spaced apart along the first direction D1, and the two ends of the second welding section 22 are respectively connected to the two adjacent battery cells 10.

[0045] Please see Figure 6 In some embodiments, the width of the first welding segment 21 is W1, and the width of the second welding segment 22 is W2, where 2 ≤ W2 / W1 ≤ 3. Alternatively, the width of the second welding segment 22 is greater than the width of the first welding segment 21. This allows the solder strip 20 to have a larger width at the second welding segment 22, which helps to reduce the contact area between the solder strip 20 and the stacked area 11 of the battery cell 10, thereby reducing the risk of cracks in the battery cell 10.

[0046] Specifically, W2 / W1 can be values ​​such as 2, 2.2, 2.5, 3, etc. It can be understood that since the solder strip 20 is in the form of a long filament, the length of the solder strip 20 is the maximum dimension of the solder strip 20, the height direction and the length direction of the solder strip 20 are perpendicular to each other, and the height direction of the solder strip 20 is the same as the thickness direction of the battery cell 10.

[0047] Please see Figure 5In some embodiments, the first welding section 21 has a height of H1, and the second welding section 22 has a height of H2, where 2≤H1 / H2≤5. In other words, the height of the first welding section 21 is greater than the height of the second welding section 22, so that the second welding section 22 is easily formed to be flat. Specifically, H1 / H2 can be 2, 2.5, 3, 4, 5, etc. The second welding section 22 can be formed by pressing a welding section with the same specifications as the first welding section 21, so that the second welding section 22 is flat.

[0048] Referring to Figure 5 and Figure 6 In some embodiments, the second welding section 22 has a width of W2, and the second welding section 22 has a height of H2, where 3≤W2 / H2≤14. For example, W2 / H2 can be 3, 3.5, 6, 9, 14, etc. In this way, the ratio of the width to the height of the second welding section 22 is large, the second welding section 22 is flat, and the second welding section 22 has a large contact area with the battery piece 10, which can reduce the pressure on the battery piece 10 during the manufacturing of the curved photovoltaic tile 100 and reduce the risk of invisible cracks in the battery piece 10.

[0049] In some embodiments, the first welding section 21 has a circular cross-section. In this way, the first welding section 21 is easy to form, and the manufacturing cost of the curved photovoltaic tile 100 can be reduced. Specifically, a whole circular strip can be used, and part of the circular strip is pressed flat, so that the part of the circular strip that is pressed flat forms the second welding section 22, and the part of the circular strip that is not pressed flat forms the first welding section 21.

[0050] Referring to Figure 6 In some embodiments, the first welding section 21 has a width of W1, and 0.18mm≤W1≤0.26mm. For example, W1 can be 0.18mm, 0.20mm, 0.24mm, 0.26mm, etc. In this way, when the first welding section 21 is within the above range, the first welding section 21 meets the demand for electrical conductivity while saving materials and reducing the manufacturing cost of the photovoltaic tile.

[0051] Referring to Figure 6 In some embodiments, the second welding section 22 has a width of W2, and 0.3mm≤W2≤0.7mm. For example, W2 can be 0.3mm, 0.35mm, 0.4mm, 0.7mm, etc. In this way, the second welding section 22 has a large width, which can increase the contact area between the second welding section 22 and the battery piece 10 and reduce the risk of cracks in the battery piece 10.

[0052] Referring to Figure 5In some embodiments, the first solder section 21 has a height H1, and 0.18mm≤H1≤0.26mm. For example, H1 can be 0.18mm, 0.20mm, 0.24mm, 0.26mm, etc. In this way, when the first solder section 21 is within the above range, the first solder section 21 saves material while meeting the requirement of electrical conduction, thereby reducing the manufacturing cost of the photovoltaic tile. It can be understood that when the cross section of the first solder section 21 is circular, the height and the width of the first solder section 21 are equal, and both are the diameter of the first solder section 21.

[0053] Referring to Figure 5 In some embodiments, the second solder section 22 has a height H2, and 0.05mm≤H2≤0.09mm. For example, H2 can be 0.05mm, 0.06mm, 0.07mm, 0.09mm, etc. In this way, the height of the second solder section 22 is small, and when the width of the second solder section 22 is constant, the material can be saved, thereby reducing the manufacturing cost of the photovoltaic tile.

[0054] Referring to Figure 2 In some embodiments, along the first direction D1, the two adjacent solar cells 10 are connected by a plurality of solder strips 20, and the plurality of solder strips 20 are arranged at intervals along the second direction D2, and the second direction D2 intersects the first direction D1. In this way, the plurality of solder strips 20 can improve the overcurrent capacity of the electrical connection between the two solar cells 10, and when one of the solder strips 20 breaks, the other solder strips 20 can still electrically connect the two solar cells 10, thereby improving the reliability of the curved photovoltaic tile 100. In the embodiments of the present application, the first direction D1 and the second direction D2 are arranged vertically.

[0055] Referring to Figure 1 In some embodiments, the curved photovoltaic tile 100 further comprises a back plate 40, and the panel 30 and the back plate 40 are arranged in layers, and the solar cell 10 is arranged between the back plate 40 and the panel 30. In this way, the back plate 40 and the panel 30 can protect the solar cell 10, thereby improving the service life of the curved photovoltaic tile 100.

[0056] Specifically, the back plate 40 can be made of metal or polymer material, and the panel 30 can be made of light-transmitting material, so that light can pass through the panel 30 to reach the solar cell 10. The back plate 40 and the panel 30 are both curved panels, and the back plate 40 and the panel 30 can have curved peaks and valleys.

[0057] The photovoltaic assembly (not shown in the figure) of the embodiments of the present application comprises a plurality of the above curved photovoltaic tiles 100, and the plurality of curved photovoltaic tiles 100 are electrically connected. In this way, the electrical connection of the plurality of curved photovoltaic tiles 100 can improve the power generation of the photovoltaic assembly.

[0058] In the description of the embodiments of the present application, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the embodiments of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0059] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "illustrative embodiment", "example", "specific example", or "some examples" 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 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.

[0060] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present application, and those skilled in the art can make changes, modifications, replacements and modifications to the above embodiments within the scope of the present application.

Claims

1. A curved photovoltaic tile, characterized in that, include: Multiple solar cells, wherein the multiple solar cells are arranged along at least one direction, and the solar cells are curved; A solder strip, wherein the solder strip connects two adjacent battery cells along a first direction; and A panel covering multiple battery cells and solder ribbons, wherein the panel includes an outer surface and an inner surface, the inner surface facing the battery cells, the solder ribbons having a reflective surface, the reflective surface being used to reflect light perpendicular to the panel and incident on the solder ribbons to the inner surface of the panel, and then reflected by the inner surface to the battery cells, the solder ribbons forming a groove with an opening facing the panel, the side of the groove forming the reflective surface, the reflective surface forming a certain angle with the inner surface of the panel; The welding strip includes multiple first welding segments and at least one second welding segment. The first welding segment is connected to a corresponding solar cell. The length of the first welding segment is greater than the length of the second welding segment. 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. The solar cell includes a first surface and a second surface facing away from each other. In two adjacent solar cells, the first surface of one solar cell is provided with the first welding segment, and the second surface of the other solar cell is provided with the first welding segment. The second welding segment is flat. The surface of the second welding segment with the largest area faces the solar cell. Along the first direction, two adjacent solar cells are partially stacked. The second welding segment spans the stacked area of ​​the two adjacent solar cells.

2. The curved photovoltaic tile of claim 1, wherein, The groove has a V-shaped cross-section.

3. The curved photovoltaic tile of claim 1, wherein, Along the length direction perpendicular to the welding strip, there are multiple reflective surfaces, which are arranged sequentially.

4. The curved photovoltaic tile of claim 1, wherein, 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 length of the first welding segment is greater than the length of the second welding segment. 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. The solar cell includes a first surface and a second surface facing away from each other. In two adjacent solar cells, the first surface of one solar cell is provided with the first welding segment, and the second surface of the other solar cell is provided with the first welding segment.

5. The curved photovoltaic tile of claim 4, wherein, The second welding section is flat, and the surface with the largest area of ​​the second welding section faces the battery cell.

6. The curved photovoltaic tile of claim 5, wherein, The width of the first welded segment is W1, and the width of the second welded segment is W2, where 2≤W2 / W1≤3.

7. The curved photovoltaic tile of claim 5, wherein, The height of the first welding segment is H1, and the height of the second welding segment is H2, wherein 2≤H1 / H2≤5.

8. The curved photovoltaic tile of claim 5, wherein, The width of the second welded segment is W2, and the height of the second welded segment is H2, wherein 3≤W2 / H2≤14.

9. A photovoltaic module, characterized by It includes multiple curved photovoltaic tiles as described in any one of claims 1-8, wherein the multiple curved photovoltaic tiles are electrically connected.

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