Photovoltaic tile

Abstract

The utility model discloses a kind of photovoltaic tile, including panel, backboard and cell piece, panel is arc, backboard is laminated with panel, cell piece is clamped between panel and backboard, the upper surface of panel is equipped with light-reflecting structure, the upper surface of panel includes intermediate area and side edge area connected with intermediate area along the circumferential direction of panel, light-reflecting structure is located in side edge area, light-reflecting structure is used to reflect light to the cell piece corresponding with side edge area.The photovoltaic tile of the application when sunlight is inclined to act on its installation plane, the cell piece corresponding to one side edge area with smaller light intensity in photovoltaic tile can obtain stronger sunlight under the action of light-reflecting structure, with higher power generation efficiency, to make the overall power generation efficiency of photovoltaic tile formed by a plurality of cell pieces in series be improved, photovoltaic tile can provide greater current output, realize the efficient work of photovoltaic tile.

Description

Technical Field

[0001] This utility model relates to the field of solar power generation technology, and in particular to a photovoltaic cylindrical tile. Background Technology

[0002] Barrel tiles are an important roofing waterproofing material in traditional Chinese architecture. Combining barrel tiles with solar energy technology to create photovoltaic barrel tiles is an innovative architectural design concept that aims to combine historical architectural aesthetics with solar power generation technology. However, photovoltaic barrel tiles have a relatively large degree of curvature, meaning the radius of curvature of their arc-shaped appearance is small. When sunlight shines at an angle onto the photovoltaic barrel tile, the light intensity on one side along its axial direction is weaker, resulting in a lower output current from the corresponding solar cells and affecting the overall current output of the photovoltaic barrel tile. Therefore, how to improve the overall current output of photovoltaic barrel tiles with a large degree of curvature has become a problem to be solved. Utility Model Content

[0003] This invention provides a photovoltaic cylindrical tile to solve at least one of the problems mentioned in the background art.

[0004] The photovoltaic barrel tile of this application includes a panel, a back sheet, and solar cells. The panel is arc-shaped, and the back sheet is stacked on top of the panel. The solar cells are sandwiched between the panel and the back sheet. The upper surface of the panel is provided with a reflective structure. The upper surface of the panel includes a central region and a side region connected to the central region along the circumferential direction of the panel. The reflective structure is located in the side region and is used to reflect light onto the solar cells corresponding to the side region.

[0005] In the photovoltaic barrel tile of this application, the solar cell corresponding to the side area with lower light intensity can obtain stronger sunlight under the action of the reflective structure, and has higher power generation efficiency. This improves the overall power generation efficiency of the photovoltaic barrel tile formed by multiple solar cells connected in series, and the photovoltaic barrel tile can provide a larger current output, thus realizing the high-efficiency operation of the photovoltaic barrel tile.

[0006] In some embodiments, the reflective structure includes a plurality of spaced-apart reflective protrusions, each of the reflective protrusions having at least one reflective surface for reflecting light onto the battery cell corresponding to the side region.

[0007] In the above embodiment, multiple reflective protrusions located on the same side area are spaced apart. The sunlight reflected by the reflective protrusions can be more evenly irradiated onto the corresponding solar cell on that side area, increasing the minimum light intensity irradiated onto the corresponding solar cell, thereby increasing the minimum output current of the corresponding solar cell, and thus increasing the overall output current of the photovoltaic watt.

[0008] In some embodiments, the angle formed between the reflective surface and the tangent plane of the upper surface is an acute angle.

[0009] In the above embodiments, the acute angle can prevent light from being reflected by the reflective surface to the non-power generation area of ​​the photovoltaic tile or even directly reflected away from the photovoltaic tile panel, thus ensuring the normal realization of the reflective function of the reflective protrusion.

[0010] In some embodiments, the reflective protrusion is a prism having a right-angled facet and an inclined facet connected to the right-angled facet, the inclined facet serving as the reflective surface.

[0011] In the above embodiment, when light shines on the reflective structure of the photovoltaic barrel tile from the side, the light first passes through the incident surface of the prism, and then propagates a distance along the radial direction of the photovoltaic barrel tile inside the prism. When it reaches the inclined surface, it is reflected by the inclined surface to the solar cell corresponding to the side area, thereby achieving a larger current output from the solar cell.

[0012] In some embodiments, the plurality of the reflective protrusions are arranged in an array, with each row of the reflective protrusions arranged on the same circumference of the upper surface, and each column of the reflective protrusions arranged along the axial direction of the upper surface.

[0013] In the above embodiment, the corresponding battery cell located below the side area receives more uniform sunlight under the effect of the reflective protrusion, and the minimum current output of the side area as a whole is effectively improved.

[0014] In some embodiments, of two adjacent reflective protrusions arranged in the same circumference, the reflective surface of one reflective protrusion is parallel to the reflective surface of the other reflective protrusion, so as to reflect light perpendicular to the reflective surface of one reflective protrusion to the reflective surface of the other reflective protrusion, and then reflect it to the battery cell.

[0015] In the above embodiment, the prism reflects light rays with low incident angles, i.e., light rays that are nearly parallel to the mounting plane of the photovoltaic tile, to the solar cells, while preventing the scattering of light rays with larger incident angles or even light rays that act perpendicularly to the inclined surface in the air. This allows the solar cells of the photovoltaic tile to receive more light under the action of light rays with different incident angles.

[0016] In some embodiments, the reflective protrusions are integrally formed with the panel.

[0017] In the above embodiments, the integrally formed reflective protrusions and panel save the overall assembly time of the photovoltaic barrel tile and avoid connection failures between the two, resulting in higher mechanical strength of the photovoltaic barrel tile including the reflective protrusions.

[0018] In some embodiments, there are two side regions, which are located on either side of the central region, and each side region is provided with the reflective structure.

[0019] In the above embodiment, the multiple arrays of reflective protrusions located in each side region can reflect light from different irradiation directions, thereby improving the light intensity obtained by the solar cells under different lighting conditions.

[0020] In some embodiments, the ratio of the area of ​​each side region to the area of ​​the upper surface ranges from 0.3 to 0.4.

[0021] In the above embodiments, multiple rows of reflective protrusions can be arranged at regular intervals on a side area with sufficient area, and the number of reflective protrusions can be set according to different ratio values.

[0022] In some embodiments, there are multiple battery cells, and the battery cell corresponding to the side region is connected in series with at least some of the other battery cells.

[0023] In the above embodiments, the minimum output current of the solar cells in different regions that are at least partially connected in series is improved, and the overall output current of the photovoltaic wattage is improved.

[0024] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0025] The above and / or additional aspects and advantages of this invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of the structure of the photovoltaic cylindrical tile according to an embodiment of this utility model; Figure 2 yes Figure 1 A structural schematic diagram of a photovoltaic cylindrical tile from another perspective; Figure 3 This is a schematic diagram of the reflective protrusion in an embodiment of the present invention; Figure 4 This is a schematic diagram of the light path of light rays acting perpendicularly on the reflective surface according to this utility model.

[0026] Explanation of reference numerals in the attached figures: 100-Photovoltaic barrel tile, 10-Panel, 11-Middle area, 12-Side area, 13-Reflective structure, 131-Reflective protrusion, 1311-Reflective surface, 132-Prism, 1321-Right angle surface, 1322-Sloping surface, 1323-Rectangular surface, 20-Back sheet, 30-Solar cell. Detailed Implementation

[0027] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0028] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0029] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows for communication; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0030] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0031] The following disclosure provides many different embodiments or examples for implementing various structures of this invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this invention, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0032] Please see Figure 1 and Figure 2 , Figure 1 This is a structural schematic diagram of the photovoltaic barrel tile 100 according to an embodiment of this utility model. Figure 2 yes Figure 1 A schematic diagram of the structure of a photovoltaic barrel tile 100 from another perspective. The photovoltaic barrel tile 100 of this embodiment includes a panel 10, a back panel 20, and solar cells 30. The panel 10 is arc-shaped, and the back panel 20 is stacked on top of the panel 10. The solar cells 30 are sandwiched between the panel 10 and the back panel 20. The upper surface of the panel 10 is provided with a reflective structure 13. The upper surface of the panel 10 includes a central region 11 and a side region 12 connected to the central region 11 along the circumferential direction of the panel 10. The reflective structure 13 is located in the side region 12 and is used to reflect light onto the solar cells 30 corresponding to the side region 12.

[0033] In the photovoltaic barrel tile 100 of this application, the solar cell 30 corresponding to the side area 12 with lower light intensity can obtain stronger sunlight under the action of the reflective structure 13, and has higher power generation efficiency. This improves the overall power generation efficiency of the photovoltaic barrel tile 100 formed by multiple solar cells 30 connected in series, and the photovoltaic barrel tile 100 can provide a larger current output, thus realizing the high-efficiency operation of the photovoltaic barrel tile 100.

[0034] Specifically, the panel 10 of the photovoltaic barrel tile 100 is the outermost structure of the photovoltaic barrel tile 100 that faces and directly receives sunlight. The shape of the panel 10 determines the appearance of the photovoltaic barrel tile. The panel 10 can be designed with colors, textures, etc., to make its appearance highly similar to traditional barrel tiles such as terracotta tiles and glazed tiles, ensuring the aesthetics and harmony of the appearance of multiple photovoltaic barrel tiles 100. Due to the requirements of high light transmittance and high strength of the panel 10, its material can be ultra-clear tempered glass or polymer composite materials, etc. The back plate 20 is the surface of the photovoltaic barrel tile 100 that faces away from the panel 10, and can be made of polymer composite materials, metal plates such as aluminum plates, etc.

[0035] The solar cell 30 is a solar cell that converts light energy into electrical energy. The solar cell 30 can be a monocrystalline silicon or polycrystalline silicon crystalline solar cell. It can be manufactured using Perc (Passivated Emitter Rear Cell) technology, Topcon (Tunnel Oxide Passivated Contact) technology, or BC (Back Contact) technology. After pressing, the solar cell 30 can be curved to match the curved shapes of the panel 10 and the backplate 20.

[0036] When light shines on the upper surface of the panel 10 of the photovoltaic barrel tile 100 along the direction inclined to the mounting plane of the photovoltaic barrel tile 100, that is, the side of the panel 10 away from the solar cell 30, one side area 12 of the photovoltaic barrel tile 100 receives a large amount of effective sunlight, and the power generation efficiency of this side area 12 is high. However, the angle between the normal direction of each point on the other side area 12 of the photovoltaic barrel tile 100 opposite to this side area 12 and the sunlight, that is, the incident angle of the sunlight, is large, and the effective irradiation intensity acting on this side area 12 will be greatly reduced.

[0037] At this time, the power generation efficiency of one side area 12 on the photovoltaic barrel tile 100 is higher, while the power generation efficiency of the other side area 12 is lower. The solar cells 30 on the photovoltaic barrel tile 100 are connected in series. The output current of the photovoltaic barrel tile 100 is determined by the minimum output current of each solar cell 30. Therefore, increasing the minimum output current of the solar cell 30 is an effective means to increase the overall output current of the photovoltaic barrel tile 100, and increasing the light intensity irradiated on the solar cell 30 is an effective means to increase the output current of the solar cell 30.

[0038] Reflective structures 13 are provided on the two side areas 12 of the photovoltaic barrel tile 100. This can change the path of the light rays that shine from the side to the side area 12 where the light is weaker. After the light rays shine on the reflective structures 13, the original straight path of light rays is deflected at a certain angle at the reflective structures 13 and then shines on the solar cells 30 corresponding to the side area 12.

[0039] In this way, some of the solar cells 30 in the area with lower light intensity on the side region 12 can obtain stronger light under the action of the reflective structure 13, making full use of the sunlight shining on the photovoltaic tile 100, so that the solar cells 30 corresponding to the side region 12 have higher power generation efficiency, thereby improving the overall power generation efficiency of the photovoltaic tile 100 formed by multiple solar cells 30 connected in series. The photovoltaic tile 100 can provide a larger current output, realizing the high-efficiency operation of the photovoltaic tile 100.

[0040] Please refer to Figure 1 , Figure 2 and Figure 3 , Figure 3 This is a schematic diagram of the structure of the reflective protrusion 131 according to an embodiment of the present invention. In some embodiments, the reflective structure 13 includes a plurality of reflective protrusions 131 arranged at intervals. Each reflective protrusion 131 has at least one reflective surface 1311, which is used to reflect light onto the battery cell 30 corresponding to the side region 12.

[0041] In the above embodiment, multiple reflective protrusions 131 located on the same side area 12 are spaced apart. The sunlight reflected by the reflective protrusions 131 can more evenly illuminate the corresponding solar cell 30 on the side area 12, thereby increasing the minimum light intensity illuminating the corresponding solar cell 30, thereby increasing the minimum current output of the corresponding solar cell 30, and thus increasing the overall output current of the photovoltaic tube 100.

[0042] Specifically, each reflective protrusion 131 is provided with at least one reflective surface 1311. The reflective protrusion 131 protrudes from the upper surface of the panel 10 and can capture sunlight that shines on the side area 12. The minimum distance between the reflective protrusion 131 and the side area 12 is less than or equal to the height of the reflective protrusion 131. The light shining on the reflective protrusion 131 is reflected to the upper surface of the panel 10 under the action of the reflective surface 1311. The light shines along the normal direction of the side area 12 or at a certain angle to the normal direction of the side area 12 and finally shines on the corresponding solar cell 30, so that the solar cell 30 receives more intense sunlight and achieves more efficient use of the sunlight shining on the photovoltaic tile 100.

[0043] Please see Figure 1 , Figure 2 and Figure 3 In some embodiments, the angle formed between the reflective surface 1311 and the tangent plane of the upper surface is an acute angle.

[0044] In the above embodiment, the acute angle can prevent light from being reflected by the reflective surface 1311 to the non-power generation area of ​​the photovoltaic tile 100 or even directly reflected away from the panel 10 of the photovoltaic tile 100, thus ensuring the normal realization of the reflective function of the reflective protrusion 131.

[0045] Specifically, the angle formed between the reflective surface 1311 and the tangent plane of the upper surface of the panel 10 is an acute angle. That is, at any point on the curved surface of the photovoltaic tile 100, the dihedral angle formed between the reflective surface 1311 of the reflective structure 131 and the tangent plane of the curved surface at that point is less than 90 degrees. The reflective structure 131 can actively and efficiently intercept and redirect incident light from the installation plane of the photovoltaic tile 100, such as the roof, at a low angle. This ensures that the sunlight reflected by the reflective surface 1311 ultimately acts on the solar cell 30 corresponding to the side area 12 facing the reflective surface 1311, thereby significantly improving the light-capturing ability of the photovoltaic tile 100 under non-perpendicular lighting conditions. This allows the solar cell 30 corresponding to the side area 12 where the reflective protrusion 131 is located to receive higher intensity sunlight, effectively improving the power generation efficiency and current output of the photovoltaic tile 100.

[0046] Please see Figure 1 , Figure 2 and Figure 3 In some embodiments, the reflective protrusion 131 is a prism 132, which has a right-angled surface 1321 and an inclined surface 1322 connected to the right-angled surface 1321, and the inclined surface 1322 serves as the reflective surface 1311.

[0047] In the above embodiment, when light shines from the side onto the reflective structure 13 of the photovoltaic barrel tile 100, the light first passes through the incident surface of the prism 132, and then propagates a distance along the radial direction of the photovoltaic barrel tile 100 inside the prism 132. When it reaches the inclined surface 1322, it is reflected by the inclined surface 1322 onto the solar cell 30 corresponding to the side region 12, thereby achieving a larger current output from the solar cell 30.

[0048] Specifically, the prism 132 has two right-angled surfaces 1321 and a rectangular surface 1323 perpendicular to the connecting plane that connects it to the side region 12. The short side of the rectangular surface 1323 is connected to the side region 12. The inclined surface 1322 connects the two opposing right-angled surfaces 1321. The two opposing right-angled surfaces 1321, the inclined surface 1322, the rectangular surface 1323, and the bottom surface, i.e. the reflective protrusion 131, together with the connecting plane of the side region 12, constitute the visual shape of the prism 132.

[0049] The prism 132 can be a right-angle prism 132. A highly reflective metal film, such as aluminum or silver, can be coated on the inclined surface 1322 of the prism 132. When light shines from the side onto the reflective structure 13 of the photovoltaic tube 100, the light first passes through the rectangular surface 1323, and then propagates a distance radially along the photovoltaic tube 100 inside the prism 132. When it reaches the inclined surface 1322, it is reflected by the inclined surface 1322 onto the corresponding solar cell 30 in the side area 12. When the incident light acting on the rectangular surface 1323 is perpendicular to the rectangular surface 1323, the incident light is reflected by the inclined surface 1322, forming a 90° change in the light path, and shines perpendicularly onto the corresponding solar cell 30, so that the corresponding solar cell 30 receives high-intensity supplementary light through perpendicular illumination, thereby enabling it to output a larger current.

[0050] In the prism 132, the inclined surface 1322 is connected to the right-angled surface 1321. One side of the right-angled surface 1321 is fixed on the side region 12. The plane formed between the two right-angled surfaces 1321 on the side region 12 is the common plane of the prism 132 and the side region 12. The prism 132 can be integrally formed with the side region 12 to form an integral structure. This allows the prism 132 to be completely fixed to the side region 12. Even under certain vibration and impact, the position will not shift, ensuring that multiple prisms 132 are in the correct position in the side region 12 to provide higher intensity light to the corresponding solar cell 30.

[0051] The right-angled facet 1321 of the prism 132 allows the prism 132 to be more stably integrated with the surface of the side region 12, ensuring that the position and angle of the tilted facet 132 remain unchanged throughout the lifespan of the photovoltaic tile 100. This achieves the intended reflection function of the prism 132 and guarantees a larger current output for the solar cell 30. It should be noted that the reflective protrusion 131 can be a prism 132 structure or other structures with similar functions.

[0052] Please see Figure 1 and Figure 2In some embodiments, the plurality of the reflective protrusions 131 are arranged in an array, with each row of the reflective protrusions 131 arranged on the same circumference of the upper surface, and each column of the reflective protrusions 131 arranged along the axial direction of the upper surface.

[0053] In the above embodiment, the corresponding battery cell 30 located below the side region 12 receives more uniform sunlight under the action of the reflective protrusion 131, and the minimum current output of the side region 12 as a whole is effectively improved.

[0054] Specifically, multiple reflective protrusions 131 are arranged in an array, that is, multiple reflective protrusions 131 are arranged in a geometric pattern according to a certain regularity, and are repeatedly replicated and positioned on the side area of ​​the photovoltaic tile 100. In the embodiments of this application, adjacent protrusions on the same straight line area in the axial direction of the photovoltaic tile 100 in the side area 12 are arranged at the same spacing. Multiple straight lines for arranging reflective protrusions 131 along the axial direction of the side area 12 are arranged at a certain spacing along the circumferential direction of the photovoltaic tile 100. Multiple rows of reflective protrusions 131 are formed on the side area 12 along the same circumferential surface of the photovoltaic tile 100 according to a certain regularity, or in other words, multiple rows of reflective protrusions 131 are formed on the side area 12 along the axial direction of the photovoltaic tile 100 at the same spacing.

[0055] Thus, the solar cells 30 located below the side area 12 receive more uniform sunlight under the action of the reflective protrusions 131, effectively improving the minimum current output of the side area 12 as a whole. Simultaneously, the array of multiple reflective protrusions 131 creates a regular, harmonious, and aesthetically pleasing upper surface for the photovoltaic tile 100. While reflecting light, the reflective protrusions 131 also serve a decorative purpose, acting as decorative facade elements to increase the added value of the photovoltaic tile 100.

[0056] For example, the multiple rows of reflective protrusions 131 located in the side region 12 can be spaced equidistant from each other, or arranged according to a certain spacing pattern. For instance, the row spacing of the reflective protrusions 131 on the side region 12 away from the central region 11 can be set to be narrower than that on the side closer to the central region 11, so that the weaker light acting on the side region 12 away from the central region 11 is reflected to a greater extent, further improving the power generation efficiency of the side region 12 under weaker illumination, thereby increasing the overall current output of the photovoltaic tile 100. For complex photovoltaic tile 100 mounting planes with different structures, different arrangement arrays can be set according to the illumination conditions to allow the solar cells 30 to obtain higher intensity illumination.

[0057] Please see Figure 4 , Figure 4 This is a schematic diagram of the light path of light rays acting perpendicularly to the reflective surface 1311 according to this utility model. The arrows in the diagram indicate the direction of light irradiation. In some embodiments, among two adjacent reflective protrusions 131 arranged on the same circumference, the reflective surface 1311 of one reflective protrusion 131 is parallel to the reflective surface 1311 of the other reflective protrusion 131, so as to reflect light rays perpendicular to the reflective surface 1311 of one reflective protrusion 131 to the reflective surface 1311 of the other reflective protrusion 131, and then reflect them to the battery cell 30.

[0058] In the above embodiment, the prism 132 reflects light rays with low incident angles, i.e., light rays that are nearly parallel to the mounting plane of the photovoltaic tile 100, toward the solar cell 30, while preventing the scattering of light rays with larger incident angles or even light rays that act perpendicularly to the inclined surface 1322 in the air. This allows the solar cell 30 of the photovoltaic tile 100 to receive more light under the action of light rays with different incident angles.

[0059] Specifically, when sunlight shines perpendicularly from the air onto the inclined surface 1322 of the prism 132, the light is reflected by the inclined surface 1322 and travels along the right-angled side of the triangular face of the prism 132 in the circumferential direction of the side region 12. The light then travels perpendicularly into the adjacent prism 132, propagates a distance along the radial direction of the photovoltaic tube 100 within the adjacent prism 132, and then acts on the inclined surface 1322 of the prism 132. Finally, under the reflection of the inclined surface 1322, the light travels perpendicularly into the corresponding side region 12 and reaches the corresponding solar cell 30, so that the solar cell 30 receives light reflected perpendicularly from the prism 132 adjacent to the prism 132 that reflects the light to it.

[0060] In this way, it can be ensured that when light shines perpendicularly from the air onto the inclined surface 1322 of the prism 132, the light will not be completely reflected into the air by the inclined surface 1322 of the prism 132. This ensures that while the prism 132 can reflect light with a low incident angle, i.e., light that is close to the mounting plane of the photovoltaic tile 100, to the solar cell 30, it will not cause light with a larger incident angle, or even light that acts perpendicularly to the inclined surface 1322, i.e., light that is parallel to the rectangular surface 1323, to be scattered in the air. This allows the solar cell 30 of the photovoltaic tile 100 to obtain more light under the action of light with different incident angles, thereby improving the overall current output of the photovoltaic tile 100.

[0061] Please see Figure 1 and Figure 2In some embodiments, the reflective protrusion 131 and the panel 10 are integrally formed.

[0062] In the above embodiments, the integrally formed reflective protrusion 131 and panel 10 save the overall assembly time of photovoltaic barrel tile 100 and avoid connection failures between the two, making the photovoltaic barrel tile 100 including the reflective protrusion 131 have higher mechanical strength.

[0063] Specifically, the reflective protrusion 131 is integrally formed with the panel 10, and the reflective structure 13 is integrally formed with the photovoltaic tile 100. There is no need for connection between the reflective protrusion 131 and the panel 10, avoiding the impact on the refractive index of the connection interface caused by the traditional adhesive layer used for bonding the reflective protrusion 131. This results in less light loss along the path from the prism 132 to the solar cell 30, allowing the solar cell 30 to receive higher intensity light. The prism 132 structure and the panel 10 can be made of the same material, including but not limited to ultra-white patterned tempered glass, high-transmittance polymer materials, etc., ensuring that the light transmittance at the prism 132 is consistent with that of the panel 10, without performance degradation due to secondary processing.

[0064] The integrated reflective protrusion 131 and panel 10 save assembly time for the photovoltaic tile 100 and prevent connection failures. The photovoltaic tile 100, including the reflective protrusion 131, has higher mechanical strength, ensuring efficient operation. Integrating the arrayed prisms 132 as part of the panel 10 in the side area 12 avoids adding additional independent components, maintaining the compact structure and ease of installation of the photovoltaic tile 100.

[0065] Please see Figure 1 and Figure 2 In some embodiments, there are two side regions 12, which are located on both sides of the middle region 11, and each side region 12 has the reflective structure 13.

[0066] In the above embodiment, the multiple arrays of reflective protrusions 131 located in each side region 12 can reflect light from different irradiation directions, thereby improving the light intensity obtained by the solar cell 30 under different lighting conditions.

[0067] The upper surface of the photovoltaic barrel tile 100 consists of two opposing side regions 12 and a middle region 11 that is combined with the two side regions 12. The two side regions 12 are centrally symmetrical along the middle region 11. The two long sides of the middle region 11 along the axial direction of the photovoltaic barrel tile 100 are combined with the sides of the two side regions 12 near the middle region 11 along the axial direction of the photovoltaic barrel tile 100 to form the complete upper surface of the photovoltaic barrel tile 100. It is combined with the protruding structure of the two side regions 12 to form the visible outer surface of the photovoltaic barrel tile 100. The two side regions 12 and the middle region 11 have the same radius of curvature and length along the axial direction. After being combined, they form a photovoltaic barrel tile 100 with a smooth appearance.

[0068] Each side region 12 of the photovoltaic barrel tile 100 is provided with a reflective structure 13. When the light changes, for example, in the morning, the light mainly acts on one side region 12 of the photovoltaic barrel tile 100, and in the evening, the light mainly acts on the other side region 12 of the photovoltaic barrel tile 100. Thus, under the action of the two opposing side regions 12, no matter which side region 12 the light mainly acts on, the multiple arrays of reflective protrusions 131 located in the side region 12 can reflect the light, improve the light intensity obtained by the solar cell 30 under different lighting conditions, further improve the light utilization rate of the photovoltaic barrel tile 100, and help the photovoltaic barrel tile 100 maintain a larger current output for a longer period of time.

[0069] The arrangement, structure, and size of the reflective protrusions 131 in each side region 12 can be identical, forming a central symmetry along the axial direction of the photovoltaic tile 100. This allows the photovoltaic tile 100 to form a symmetrical and aesthetically pleasing upper surface, and the centrally symmetrical reflective protrusions 131 greatly simplify the production process, improving production efficiency. In other embodiments of this application, the arrangement of the reflective structures 13 in the two side regions 12 can differ to accommodate more complex light variations.

[0070] Please see Figure 1 and Figure 2 In some embodiments, the ratio of the area of ​​each side region 12 to the area of ​​the upper surface ranges from 0.3 to 0.4.

[0071] In the above embodiment, multiple rows of reflective protrusions 131 can be arranged at regular intervals on the side area 12 with sufficient area. The number of reflective protrusions 131 can be set according to different ratio values.

[0072] Specifically, the ratio of the area of ​​each side region 12 to the area of ​​the upper surface is in the range of 0.3-0.4, that is, the total area of ​​the two side regions 12 accounts for 60%-80% of the total area of ​​the upper surface. In this way, multiple rows of reflective protrusions 131 can be arranged on the side regions 12 with sufficient area according to a certain regular spacing. The number of reflective protrusions 131 can be set according to different ratio values.

[0073] When the photovoltaic barrel tile 100 has a higher overall output current requirement, a larger side area 12 can be set to accommodate more reflective protrusions 131 so that the solar cell 30 receives higher intensity light irradiation. When the photovoltaic barrel tile 100 has a lower overall output current requirement, a smaller side area 12 can be used and a certain number of reflective protrusions 131 can be arranged accordingly to achieve a balance between manufacturing cost and output power, making the photovoltaic barrel tile 100 economical.

[0074] Please combine Figure 1 and Figure 2 In some embodiments, there are multiple battery cells 30, and the battery cell 30 corresponding to the side region 12 is connected in series with at least some of the other battery cells 30.

[0075] In the above embodiments, the minimum output current of the solar cells 30 in different regions that are at least partially connected in series is improved, and the overall output current of the photovoltaic barrel tile 100 is improved.

[0076] Specifically, multiple solar cells 30 are arranged below the panel 10 of the photovoltaic barrel tile 100. Solar cells 30 with similar lighting conditions can be arranged in the same series group, and different series groups can be connected in parallel. For example, the solar cells 30 corresponding to the side area 12 can be divided into multiple series groups according to the intensity change of the side light refracted by the prism 132. The multiple series groups and the series group corresponding to the solar cells 30 located in the middle area 11 are connected in parallel to maximize the current output of the solar cells 30 in the corresponding area of ​​each series group, so that the photovoltaic barrel tile 100 has a larger current output to meet the user's needs.

[0077] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0078] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A photovoltaic cylindrical tile, characterized in that, include: Panel, the panel being arc-shaped; A back panel, which is stacked with the front panel; A battery cell is sandwiched between the panel and the back panel. The upper surface of the panel is provided with a reflective structure. The upper surface of the panel includes a central region and a side region connected to the central region along the circumferential direction of the panel. The reflective structure is located in the side region and is used to reflect light onto the battery cell corresponding to the side region.

2. The photovoltaic cylindrical tile according to claim 1, characterized in that, The reflective structure includes a plurality of spaced-apart reflective protrusions, each of which has at least one reflective surface for reflecting light onto the battery cell corresponding to the side region.

3. The photovoltaic cylindrical tile according to claim 2, characterized in that, The angle formed between the reflective surface and the tangent plane of the upper surface is an acute angle.

4. The photovoltaic cylindrical tile according to claim 2, characterized in that, The reflective protrusion is a prism, which has a right-angled face and an inclined face connected to the right-angled face, and the inclined face serves as the reflective surface.

5. The photovoltaic cylindrical tile according to claim 2, characterized in that, The reflective protrusions are arranged in an array, with each row of the reflective protrusions arranged on the same circumference of the upper surface, and each column of the reflective protrusions arranged along the axial direction of the upper surface.

6. The photovoltaic cylindrical tile according to claim 5, characterized in that, In two adjacent reflective protrusions arranged on the same circumference, the reflective surface of one reflective protrusion is parallel to the reflective surface of the other reflective protrusion, so that light perpendicular to the reflective surface of one reflective protrusion is reflected to the reflective surface of the other reflective protrusion, and then reflected to the battery cell.

7. The photovoltaic cylindrical tile according to claim 2, characterized in that, The reflective protrusions are integrally formed with the panel.

8. The photovoltaic cylindrical tile according to claim 1, characterized in that, There are two side regions, which are located on either side of the central region, and each side region is provided with the reflective structure.

9. The photovoltaic cylindrical tile according to claim 8, characterized in that, The ratio of the area of ​​each side region to the area of ​​the upper surface ranges from 0.3 to 0.

4.

10. The photovoltaic cylindrical tile according to claim 1, characterized in that, The number of battery cells is multiple, and the battery cell corresponding to the side area is connected in series with at least some of the other battery cells.

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