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 and a solder strip, 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 welding strip comprises a plurality of first welding sections and at least one second welding section, the second welding section is positioned between the two adjacent battery pieces, the surface of the first welding section is an arc-shaped surface, and textures are formed on the surface of the first welding section. Thus, the length of the first welding section is larger than that of the second welding section, the surface of the first welding section is in an arc shape, the surface area, facing the single direction, of the first welding section is small, light reflection can be reduced, further, grains are formed on the surface of the first welding section, and light reflection can be further reduced through the grains. Therefore, adverse effects possibly caused by light reflected by the curved-surface photovoltaic tile can be reduced.

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, the surface of welding band is relatively smooth, and light is relatively easy to reflect. When photovoltaic tile is installed on roof, 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 and welding band, 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 welding band includes multiple first welding sections and at least one second welding section, the first welding section is connected with corresponding one the cell piece, the length of the first welding section is greater than the length of the second welding section, the second welding section connects two adjacent the first welding section along the first direction, and the second welding section is located between two adjacent the cell piece, wherein, the surface of the first welding section is arc surface, and the surface of the first welding section is formed with texture.

[0005] In the curved photovoltaic tile of the application embodiment, the length of the first welding section is greater than the length of the second welding section, the surface of the first welding section is arc, so that the surface area of first welding section towards single direction is smaller, it is favorable to reduce light reflection, further, the surface of first welding section is formed with texture, texture can further reduce light reflection, so that the adverse effect that light reflected by curved photovoltaic tile can bring can be reduced.

[0006] In some embodiments, the texture has first groove extending along the length direction of the first welding section.

[0007] In some embodiments, the texture has second groove, and the extension direction of the second groove is intersected with the extension direction of the first groove.

[0008] In some embodiments, the cell piece includes opposite first surface and second surface, in two adjacent the cell piece, wherein the first surface of one the cell piece is equipped with the first welding section, and the second surface of another the cell piece is equipped with the first welding section.

[0009] In some embodiments, the second soldering section is flat, and a surface of the second soldering section with the largest area faces the battery piece.

[0010] In some embodiments, the first soldering section has a width of W1, and the second soldering section has a width of W2, wherein 2≤W2 / W1≤3.

[0011] In some embodiments, the first soldering section has a height of H1, and the second soldering section has a height of H2, wherein 2≤H1 / H2≤5.

[0012] In some embodiments, the second soldering section has a width of W2, and the second soldering section has a height of H2, wherein 3≤W2 / H2≤14.

[0013] In some embodiments, the curved photovoltaic tile further comprises a back plate and a panel stacked with the back plate, and the battery piece is arranged between the back plate and the panel.

[0014] The photovoltaic assembly 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] The additional aspects and advantages of the present application will be partially given in the following description, and will become apparent from the following description, or will be understood by those skilled in the art through the practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0016] The above and / or additional aspects and advantages of the present application will become apparent from the following description in conjunction with the accompanying drawings, wherein:

[0017] Figure 1 is a three-dimensional schematic view of a curved photovoltaic tile of the embodiments of the present application;

[0018] Figure 2 is a partial structure schematic view of a curved photovoltaic tile of the embodiments of the present application;

[0019] Figure 3 is a side schematic view of a curved photovoltaic tile of the embodiments of the present application;

[0020] Figure 4 is a partial schematic view of a solder strip of the embodiments of the present application;

[0021] Figure 5 is a side schematic view of a first soldering section of the embodiments of the present application;

[0022] Figure 6 is a partial structure schematic view of a curved photovoltaic tile of the embodiments of the present application;

[0023] Figure 7 is a side view of a curved photovoltaic tile according to an embodiment of the present application.

[0024] BRIEF DESCRIPTION OF DRAWINGS

[0025] 100 - curved photovoltaic tile; 10 - cell; 11 - lamination area; 12 - first surface; 13 - second surface; 20 - solder strip; 21 - first soldering section; 211 - texture; 212 - first groove; 213 - second groove; 22 - second soldering section; 30 - back plate; 40 - panel; D1 - first direction; D2 - second direction. DETAILED DESCRIPTION

[0026] The embodiments of the present application will be described in detail with reference to the drawings, wherein like reference numerals refer to like elements throughout. The embodiments described below are examples of implementing the present application and are not intended to limit the present application, as defined by the claims.

[0027] In the present application, unless specifically defined otherwise, a first feature "on" or "under" a second feature can include the first and second features being in direct contact, or the first and second features not being in direct contact but being in contact through another feature between them. Also, the first feature "over", "above" and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or only indicating that the first feature is higher in horizontal height than the second feature. The first feature "under", "below" and "underneath" the second feature includes the first feature being directly below and obliquely below the second feature, or only indicating that the first feature is lower in horizontal height than the second feature.

[0028] The following disclosure provides many different embodiments, or examples, for implementing different structures of the present application. For the purpose of simplification, the components and arrangements of the specific examples are described in the following. Of course, they are only examples and are not intended 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, and does not itself indicate the relationship between the various embodiments and / or arrangements 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.

[0029] In the related art, a photovoltaic tile includes cell pieces and a solder strip, and the solder strip can electrically connect the cell pieces in series. In order to increase the light receiving area of the photovoltaic tile, so as to improve the photoelectric conversion efficiency of the photovoltaic tile, two adjacent cell pieces of the photovoltaic tile are arranged in a partial laminated manner, and the solder strip passes through the laminated area of the cell pieces from between the two cell pieces. Since the photovoltaic tile is generally a multi-layer structure, the multi-layer structure needs to be combined together by pressing. During the manufacturing process of the photovoltaic tile, the solder strip and the cell pieces are pressed, so that the laminated position of the two adjacent cell pieces may have defects such as cracks under the action of the pressure.

[0030] Please refer to Figures 1-5 The curved photovoltaic tile 100 of the embodiment of the present application includes a plurality of cell pieces 10 and a solder strip 20. 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. 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 cell 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 along the first direction D1. The second solder segment 22 is located between the two adjacent cell pieces 10. The surface of the first solder segment 21 is arc-shaped. The surface 210 of the first solder segment 21 is formed with a texture 211.

[0031] In the curved photovoltaic tile 100 of the embodiment of the present application, the length of the first solder segment 21 is greater than the length of the second solder segment 22, and the surface 210 of the first solder segment 21 is arc-shaped, so that the surface area of the first solder segment 21 in a single direction is small, which is beneficial to reduce light reflection. Further, the surface 210 of the first solder segment 21 is formed with a texture 211, which can further reduce light reflection, so as to reduce the adverse effects of the reflected light of the curved photovoltaic tile 100.

[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 prone to water accumulation, and can be applied to scenarios 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 requirements, for example, the number can be 2, 3, 10, 50, etc.

[0034] The solder strip 20 is used to electrically connect a plurality of battery pieces 10, and can be made of silver, tin or an alloy or the like to improve the electrical conductivity of the solder strip 20. The first soldering sections 21 of the solder strip 20 can be soldered to the battery pieces 10, and the number of the second soldering sections 22 is one less than the number of the first soldering sections 21, for example, when the number of the first soldering sections 21 is two, the number of the second soldering sections 22 is one. The first soldering sections 21 and the second soldering sections 22 can be of an integral structure.

[0035] The surface 210 of the first soldering section 21 is arc-shaped, which means that the surface of the first soldering section 21 exposed outside the battery piece 10 can be enveloped by two arc-shaped surfaces. Before the texture 211 is formed, the surface 210 of the first soldering section 21 can be a smooth surface, and after the texture 211 is formed, the roughness of the surface of the first soldering section 21 is increased, so that part of the light is diffusely reflected on the surface 210 of the first soldering section 21 and is absorbed by the surface 210 of the first soldering section 21 or is reflected to the battery piece 10, thereby reducing the amount of light reflected outside the curved photovoltaic tile 100 by the solder strip. The texture 211 of the surface 210 of the first soldering section 21 can be formed by a wire drawing process.

[0036] Referring to Figure 4 and Figure 5 In some embodiments, the texture 211 has a first groove 212 extending along the length direction of the first soldering section 21. In this way, the texture 211 of the surface of the first soldering section 21 is easy to form, which can reduce the manufacturing cost of the curved photovoltaic tile 100.

[0037] Specifically, the cross-sectional shape of the first groove 212 can be circular, triangular or the like. The number of the first grooves 212 can be multiple along a direction perpendicular to the extension direction of the first soldering section 21, and the multiple first grooves 212 can be arranged at intervals.

[0038] Referring to Figure 4 and Figure 5 In some embodiments, the texture 211 has a second groove 213, and the extension direction of the second groove 213 is arranged intersecting the extension direction of the first groove 212. In this way, the second groove 213 and the first groove 212 together make the texture 211 formed on the surface of the first soldering section 21 relatively rough, which is beneficial to reducing the light reflection of the first soldering section 21.

[0039] Referring to Figure 3 In some embodiments, the battery piece 10 includes a first surface 12 and a second surface 13 opposite to each other, and in two adjacent battery pieces 10, the first surface 12 of one of the battery pieces 10 is provided with the first soldering section 21, and the second surface 13 of the other battery piece 10 is provided with the first soldering section 21.

[0040] In this way, the welding ribbons 20 are connected to the battery pieces 10 in an up-and-down interlaced manner, which can reduce the area of the welding ribbons 20 on the same side of all the battery pieces 10, thereby reducing light reflection.

[0041] As shown in FIG. 1, the first surface 12 of the left battery piece 10 is provided with a first welding section 21, and the second surface 13 of the right battery piece 10 is provided with a second welding section 22. Figure 3

[0042] As shown in FIG. 1, the first surface 12 of the left battery piece 10 is provided with a first welding section 21, and the second surface 13 of the right battery piece 10 is provided with a second welding section 22. Figure 3 Figure 4 In some embodiments, the second welding section 22 is flat. The surface with the largest area of the second welding section 22 faces the battery piece 10. In this way, the contact area between the second welding section 22 and the battery piece 10 is increased, the pressure on the battery piece 10 is reduced, and the risk of defects such as cracks on the battery piece 10 is reduced.

[0043] As shown in FIG. 1, the first surface 12 of the left battery piece 10 is provided with a first welding section 21, and the second surface 13 of the right battery piece 10 is provided with a second welding section 22. Figure 2 Figure 3 In some embodiments, along the first direction D1, the two adjacent battery pieces 10 are partially stacked, and the second welding section 22 spans the stacking area 11 of the two adjacent battery pieces 10. The stacking area 11 of the two adjacent battery pieces 10 refers to the area where the two adjacent battery pieces 10 have an overlapping area. The second welding section 22 spanning the stacking area 11 means that the ends of the second welding section 22 in the first direction D1 both extend out of the stacking area 11. The second welding section 22 being flat means that the width of the second welding section 22 is greater than the height of the second welding section 22.

[0044] As shown in FIG. 1, the first surface 12 of the left battery piece 10 is provided with a first welding section 21, and the second surface 13 of the right battery piece 10 is provided with a second welding section 22. Figure 6 Figure 7 In some embodiments, along the first direction D1, the two adjacent battery pieces 10 are spaced apart, and the two ends of the second welding section 22 are connected to the two adjacent battery pieces 10, respectively.

[0045] As shown in FIG. 1, the first surface 12 of the left battery piece 10 is provided with a first welding section 21, and the second surface 13 of the right battery piece 10 is provided with a second welding section 22. Figure 4 In some embodiments, the width of the first welding section 21 is W1, and the width of the second welding section 22 is W2, where 2≤W2 / W1≤3. In other words, the width of the second welding section 22 is greater than the width of the first welding section 21, which can make the width of the welding ribbon 20 at the second welding section 22 larger, thereby reducing the contact area between the welding ribbon 20 and the stacking area 11 of the battery piece 10 and reducing the risk of cracks on the battery piece 10.

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

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

[0048] Referring to Figure 3 and Figure 4 In some embodiments, the width of the second soldering section 22 is W2, and the height of the second soldering section 22 is 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 soldering section 22 is large, the second soldering section 22 is in a flat shape, and the area of the second soldering section 22 in contact with the battery piece 10 is large, which can reduce the pressure on the battery piece 10 during the manufacturing process of the curved photovoltaic tile 100 and reduce the risk of invisible cracks in the battery piece 10.

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

[0050] Referring to Figure 4 In some embodiments, the width of the first soldering section 21 is 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 soldering section 21 is within the above range, the first soldering section 21 meets the demand for electrical conductivity while saving materials and reducing the manufacturing cost of the photovoltaic tile.

[0051] Referring to Figure 4In some embodiments, the second welding section 22 has a width W2, and 0.3mm≤W2≤0.7mm. For example, W2 can be 0.3mm, 0.35mm, 0.4mm, 0.7mm, or the like. In this way, the second welding section 22 has a larger width, which can increase the contact area between the second welding section 22 and the battery sheet 10, and reduce the risk of cracks on the battery sheet 10.

[0052] Referring to FIG. 1, the curved photovoltaic tile 100 includes a plurality of battery sheets 10, a plurality of welding bands 20, a back plate 30, and a face plate 40. The battery sheets 10 are arranged in a plurality of rows along a first direction D1, and the battery sheets 10 in each row are arranged in a plurality of columns along a second direction D2. The battery sheets 10 in each row are connected by the welding bands 20, and the welding bands 20 in each column are connected by the welding bands 20. The back plate 30 and the face plate 40 are arranged in a stack, and the battery sheets 10 are arranged between the back plate 30 and the face plate 40. Figure 3 In some embodiments, the first welding 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, or the like. In this way, the first welding section 21 has a height within the above range, which can satisfy the requirement of electrical conduction while saving materials and reducing the manufacturing cost of the photovoltaic tile. It can be understood that when the cross section of the first welding section 21 is circular, the height and the width of the first welding section 21 are equal, and both are the diameter of the first welding section 21.

[0053] Referring to FIG. 1, the curved photovoltaic tile 100 includes a plurality of battery sheets 10, a plurality of welding bands 20, a back plate 30, and a face plate 40. The battery sheets 10 are arranged in a plurality of rows along a first direction D1, and the battery sheets 10 in each row are arranged in a plurality of columns along a second direction D2. The battery sheets 10 in each row are connected by the welding bands 20, and the welding bands 20 in each column are connected by the welding bands 20. The back plate 30 and the face plate 40 are arranged in a stack, and the battery sheets 10 are arranged between the back plate 30 and the face plate 40. Figure 3 In some embodiments, the second welding 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, or the like. In this way, the second welding section 22 has a smaller height, which can save materials and reduce the manufacturing cost of the photovoltaic tile when the width of the second welding section 22 is constant.

[0054] Referring to FIG. 1, the curved photovoltaic tile 100 includes a plurality of battery sheets 10, a plurality of welding bands 20, a back plate 30, and a face plate 40. The battery sheets 10 are arranged in a plurality of rows along a first direction D1, and the battery sheets 10 in each row are arranged in a plurality of columns along a second direction D2. The battery sheets 10 in each row are connected by the welding bands 20, and the welding bands 20 in each column are connected by the welding bands 20. The back plate 30 and the face plate 40 are arranged in a stack, and the battery sheets 10 are arranged between the back plate 30 and the face plate 40. Figure 2 In some embodiments, along the first direction D1, the two adjacent battery sheets 10 are connected by a plurality of welding bands 20, and the plurality of welding bands 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 welding bands 20 can improve the overcurrent capacity of the electrical connection between the two battery sheets 10, and when one of the welding bands 20 breaks, the other welding bands 20 can still electrically connect the two battery sheets 10, and improve 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 perpendicularly.

[0055] Referring to FIG. 1, the curved photovoltaic tile 100 includes a plurality of battery sheets 10, a plurality of welding bands 20, a back plate 30, and a face plate 40. The battery sheets 10 are arranged in a plurality of rows along a first direction D1, and the battery sheets 10 in each row are arranged in a plurality of columns along a second direction D2. The battery sheets 10 in each row are connected by the welding bands 20, and the welding bands 20 in each column are connected by the welding bands 20. The back plate 30 and the face plate 40 are arranged in a stack, and the battery sheets 10 are arranged between the back plate 30 and the face plate 40. Figure 1 In some embodiments, the curved photovoltaic tile 100 further includes a back plate 30 and a face plate 40 arranged in a stack, and the battery sheets 10 are arranged between the back plate 30 and the face plate 40. In this way, the back plate 30 and the face plate 40 can protect the battery sheets 10, and improve the service life of the curved photovoltaic tile 100. Specifically, the back plate 30 can be made of metal or high polymer material, and the face plate 40 can be made of light-transmitting material, so that light can pass through the face plate 40 to reach the battery sheets 10. The back plate 30 and the face plate 40 are both curved, and the back plate 30 and the face plate 40 can have curved peaks and valleys.

[0056] The photovoltaic module (not shown in the figure) of the embodiment of the present application comprises a plurality of the curved photovoltaic tiles 100, and the plurality of the curved photovoltaic tiles 100 are electrically connected. In this way, the plurality of the curved photovoltaic tiles 100 electrically connected can improve the power generation of the photovoltaic module.

[0057] 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.

[0058] 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.

[0059] 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 variations to the above embodiments within the scope of the present application.

Claims

1. A curved photovoltaic tile, characterized in that, The curved photovoltaic tile comprises: a plurality of battery pieces arranged along at least one direction; a solder strip connecting two adjacent battery pieces in a first direction, the solder strip comprising a plurality of first solder segments and at least one second solder segment, each first solder segment being connected to a corresponding battery piece, the length of each first solder segment being greater than the length of each second solder segment, each second solder segment connecting two adjacent first solder segments in the first direction and being located between two adjacent battery pieces, wherein the surface of each first solder segment is arc-shaped and forms a texture.

2. The curved photovoltaic tile of claim 1, wherein, The texture has a first groove extending along the length of the first solder segment.

3. The curved photovoltaic tile of claim 2, wherein, The texture has a second groove extending in a direction intersecting the direction of the first groove.

4. The curved photovoltaic tile of claim 1, wherein, Each battery piece comprises a first surface and a second surface opposite to each other, in two adjacent battery pieces, the first surface of one battery piece is provided with a first solder segment, and the second surface of the other battery piece is provided with a first solder segment.

5. The curved photovoltaic tile of claim 1, wherein, The second solder segment is flat, and the surface with the largest area of the second solder segment faces the battery piece.

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

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

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

9. The curved photovoltaic tile of claim 1, wherein, The curved photovoltaic tile further comprises a back plate and a panel laminated with the back plate, and the battery pieces are arranged between the back plate and the panel.

10. A photovoltaic module, characterized by, The curved photovoltaic tile comprises: a plurality of battery pieces arranged along at least one direction; a solder strip connecting two adjacent battery pieces in a first direction, the solder strip comprising a plurality of first solder segments and at least one second solder segment, each first solder segment being connected to a corresponding battery piece, the length of each first solder segment being greater than the length of each second solder segment, each second solder segment connecting two adjacent first solder segments in the first direction and being located between two adjacent battery pieces, wherein the surface of each first solder segment is arc-shaped and forms a texture. The texture has a first groove extending along the length of the first solder segment. The texture has a second groove extending in a direction intersecting the direction of the first groove. Each battery piece comprises a first surface and a second surface opposite to each other, in two adjacent battery pieces, the first surface of one battery piece is provided with a first solder segment, and the second surface of the other battery piece is provided with a first solder segment. The second solder segment is flat, and the surface with the largest area of the second solder segment faces the battery piece. The width of the first solder segment is W1, and the width of the second solder segment is W2, wherein 2≤W2 / W1≤3. The height of the first solder segment is H1, and the height of the second solder segment is H2, wherein 2≤H1 / H2≤5. The width of the second solder segment is W2, and the height of the second solder segment is H2, wherein 3≤W2 / H2≤14. The curved photovoltaic tile further comprises a back plate and a panel laminated with the back plate, and the battery pieces are arranged between the back plate and the panel.

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