Curved surface photovoltaic piece and photovoltaic building surface

Abstract

The invention discloses a curved surface photovoltaic piece and a photovoltaic building surface. The curved surface photovoltaic piece comprises a battery piece, a front plate, a conductive layer and a back plate. The battery piece has a light receiving surface and a backlight surface which are opposite. The front plate is located on one side of the light receiving face. The conducting layer is electrically connected with the battery piece and located on one side of the backlight face. The back plate is located on the side, away from the battery piece, of the conducting layer. The front plate, the battery piece, the conducting layer and the back plate are sequentially stacked. In the curved-surface photovoltaic piece, the conductive layer is only arranged on the backlight surface, so that the overall bending radian of the battery piece is relatively large, and the bending radian of the curved-surface photovoltaic piece is also relatively large. Compared with an existing curved surface photovoltaic piece, the curved surface radian of the curved surface photovoltaic piece is large, and the curved surface photovoltaic piece can be well attached to a building.

Description

Technical Field

[0001] This application relates to the field of photovoltaic technology, and more particularly, to a curved photovoltaic component and a photovoltaic building surface. Background Art

[0002] In order to be installed in combination with traditional tiles on buildings, curved photovoltaic tiles have emerged. The initial curved photovoltaic tiles were developed based on flexible copper indium gallium selenide solar cells. Although the copper indium gallium selenide solar cells have significant flexible characteristics, their power generation efficiency is only 12%-14%, and the cost is high. At present, in order to improve the power generation efficiency and reduce the cost of curved photovoltaic tiles, most of them use crystalline silicon solar cells, and the photoelectric conversion efficiency of using crystalline silicon solar cells is relatively high. However, due to the large brittleness of crystalline silicon solar cells, they are prone to breakage when bent under stress, resulting in a relatively small ratio of the arc length to the corresponding chord length of the curved section of the current curved photovoltaic tiles, and a relatively small curved surface radian, thus resulting in a low degree of fit between the curved photovoltaic tiles and the building. Summary of the Invention

[0003] The embodiments of this application provide a curved photovoltaic component and a photovoltaic building surface, which are at least used to solve the problems of relatively small curved surface radian of the curved photovoltaic component and low degree of fit between the curved photovoltaic component and the building.

[0004] The curved photovoltaic component of the embodiments of this application includes a solar cell, a front plate, a conductive layer, and a back plate. The solar cell has a light-receiving surface and a light-emitting surface opposite to each other. The front plate is located on one side of the light-receiving surface. The conductive layer is electrically connected to the solar cell, and the conductive layer is located on one side of the light-emitting surface. The back plate is located on the side of the conductive layer away from the solar cell, and the front plate, the solar cell, the conductive layer, and the back plate are stacked in sequence.

[0005] In some embodiments, the front plate, the solar cell, and the back plate are all curved surfaces.

[0006] In some embodiments, the bending radius of the solar cell ranges from [25 mm, 200 mm].

[0007] In some embodiments, the longitudinal projection of the curved surface is a curve formed by a curved section, or the longitudinal projection of the curved surface is a curve formed by multiple curved sections connected in sequence, or the longitudinal projection of the curved surface is a special-shaped curve formed by a curved section and a straight section. The curved section is an arc, and the ratio of the arc length of the curved section to the corresponding chord length ranges from [1.03, 1.67].

[0008] In some embodiments, when the longitudinal projection of the curved surface is a curve formed by a plurality of sequentially connected curve segments, the bending directions of adjacent two curve segments are opposite, and the bending radii of the plurality of curve segments are the same; when the longitudinal projection of the curved surface is a special-shaped curve formed by a curve segment and a straight line segment, the bending directions of the plurality of curve segments are the same, and the bending radii of the plurality of curve segments are the same.

[0009] In some embodiments, the solar cell has a positive electrode and a negative electrode, both the positive electrode and the negative electrode are disposed on the backlight surface, and the conductive layer connects the positive electrode and the negative electrode of adjacent solar cells.

[0010] In some embodiments, the solar cell is a whole solar cell or the solar cell is a corresponding multi-sectioned whole solar cell.

[0011] In some embodiments, there is a gap between the plurality of solar cells, and the curved surface photovoltaic device further includes a shielding member, and the shielding member is disposed on the light-receiving surfaces of two adjacent solar cells and shields the gap.

[0012] In some embodiments, two adjacent solar cells are seamlessly spliced.

[0013] In some embodiments, one light-receiving surface and the other backlight surface of two adjacent solar cells are seamlessly lapped.

[0014] In some embodiments, the curved surface photovoltaic device further includes a first adhesive layer and a second adhesive layer, the first adhesive layer is used to connect the front plate and the solar cell, and the second adhesive layer is used to connect the solar cell, the conductive layer and the back plate.

[0015] In some embodiments, the conductive layer is black.

[0016] The photovoltaic building surface of the embodiment of the present application includes a plurality of curved surface photovoltaic devices as described in any one of the above embodiments, and adjacent curved surface photovoltaic devices are connected to each other.

[0017] In the curved surface photovoltaic device of the embodiment of the present application, the conductive layer is only disposed on the backlight surface, and the conductive layer is not disposed on the light-receiving surface. Therefore, the contact area between the light-receiving surface and light is large, the utilization rate of light by the solar cell is high, and the power generation efficiency of the curved surface photovoltaic device is high. And because the conductive layer is disposed on the same side of the solar cell, the overall bending radian of the solar cell can be larger, and the bending radian of the curved surface photovoltaic device is also larger. Compared with the current curved surface photovoltaic device, the curved surface radian of the curved surface photovoltaic device of the embodiment of the present application is larger, and the curved surface photovoltaic device can have a better fitting degree with the building.

[0018] Additional aspects and advantages of the present application will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present application. Description of the Drawings

[0019] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0020] Figure 1 is a schematic structural diagram of a curved photovoltaic component according to some embodiments of the present application;

[0021] Figure 2 is a schematic structural diagram of a curved photovoltaic component according to other embodiments of the present application;

[0022] Figure 3 is a schematic structural diagram of a curved photovoltaic component according to still other embodiments of the present application;

[0023] Figure 4 is a schematic structural diagram of a battery cell and a conductive layer in a curved photovoltaic component according to some embodiments of the present application;

[0024] Figure 5 is a schematic structural diagram of a battery cell and a conductive layer in a curved photovoltaic component according to other embodiments of the present application;

[0025] Figure 6 is a schematic structural diagram of a battery cell and a conductive layer in a curved photovoltaic component according to still other embodiments of the present application;

[0026] Figure 7 is a schematic structural diagram of a photovoltaic building surface according to certain embodiments of the present application.

[0027] Main Element Symbol Description:

[0028] 1000, photovoltaic building surface; 100, curved photovoltaic component; 10, front plate; 30, first adhesive layer; 50, battery cell; 51, light-receiving surface; 53, backlight surface; 55, shielding member; 60, conductive layer; 70, second adhesive layer; 90, back plate. Detailed Embodiments

[0029] To make the above objects, features, and advantages of the present application more apparent and understandable, the following detailed description of the specific embodiments of the present application will be given in conjunction with the drawings. Many specific details are set forth in the following description in order to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0030] In the description of the present application, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationships shown in the drawings. These are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present application.

[0031] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "a plurality" means at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0032] In the present application, unless otherwise clearly specified and defined, terms such as "mounted", "connected", "coupled", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0033] In the present application, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0034] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation.

[0035] In order to be installed in combination with traditional tiles in architecture, the curved photovoltaic tile came into being. The initial curved photovoltaic tile was developed based on flexible copper indium gallium selenide solar cells. Although the flexible copper indium gallium selenide solar cells have significant flexible characteristics, their power generation efficiency is only 12%-14%, and the cost is high. At present, in order to improve the power generation efficiency and reduce the cost of the curved photovoltaic tile, most of them use crystalline silicon solar cells, and the photoelectric conversion efficiency of the crystalline silicon solar cells is relatively high. However, due to the large brittleness of the crystalline silicon solar cells, they are prone to breakage when subjected to bending force, resulting in a small ratio of the arc length to the corresponding chord length of the curved section of the current curved photovoltaic tile and a small curved surface radian, thereby resulting in a low degree of fit between the curved photovoltaic tile and the building. To solve this problem, the embodiments of the present application provide a curved photovoltaic component 100 ( Figure 1 as shown) and a photovoltaic building surface 1000 ( Figure 5 as shown).

[0036] Please refer to Figure 1 and Figure 2 . The curved photovoltaic component 100 of the embodiments of the present application includes a solar cell 50, a front plate 10, a conductive layer 60 and a back plate 90. The solar cell 50 includes an opposite light-receiving surface 51 and a backlight surface 53. The front plate 10 is located on one side of the light-receiving surface 51. The conductive layer 60 is electrically connected to the solar cell 50, and the conductive layer 60 is located on one side of the backlight surface 53. The back plate 90 is located on the side of the conductive layer 60 away from the solar cell 50, and the front plate 10, the solar cell 50, the conductive layer 60 and the back plate 90 are stacked in sequence.

[0037] Specifically, the curved photovoltaic component 100 is a structure for converting light energy into electrical energy to supply power to other components and can be used as a component of a building. The curved photovoltaic component 100 can be installed on the top or side of a building. While the curved photovoltaic component 100 can generate electricity, it can also make the building have better aesthetics.

[0038] The front plate 10 is a structure for protecting the light-receiving surface 51 of the battery cell 50. Preferably, the front plate 10 has a relatively high light transmittance. For example, the light transmittance can be greater than or equal to 70%, so that most or even all of the light can pass through the front plate 10 and reach the battery cell 50, enabling the battery cell 50 to convert the received light energy into electrical energy. For example, the light transmittance of the front plate 10 can be 70%, 73.1%, 75.6%, 77%, 78.5%, 80.3%, 83%, 85.1%, 87.2%, 90.5%, 92.4%, 93.7%, 95.6%, 97.8%, or 100%, etc. The material of the front plate 10 can be, but is not limited to, transparent glass, polycarbonate plastic, etc. When the material of the front plate 10 is transparent glass, the light transmittance of the transparent glass front plate 10 can reach 85% - 90%. The front plate 10 has a relatively high light transmittance, and the transparent glass front plate 10 has a relatively high strength, which can better protect the battery cell 50. When the material of the front plate 10 is polycarbonate plastic, the light transmittance of the polycarbonate front plate 10 can reach 89%. The front plate 10 also has a relatively high light transmittance. The polycarbonate front plate 10 has good bending performance and a relatively light weight, so that the overall weight of the curved photovoltaic component 100 is relatively light, facilitating handling and movement.

[0039] The back plate 90 is a structure for protecting the backlight surface 53 of the battery cell 50. The battery cell 50 is disposed between the front plate 10 and the back plate 90, and the battery cell 50 is protected by the front plate 10 and the back plate 90. The material of the back plate 90 can be the same as or different from the material of the front plate 10. The material of the back plate 90 can be, but is not limited to, glass or polymer materials, etc. Among them, the polymer materials include polyethylene terephthalate (PET) and composites of PET. When the material of the back plate 90 is glass, the back plate 90 has a relatively high strength and can provide good protection for the battery cell 50. When the material of the back plate 90 is a polymer material, the back plate 90 has a relatively light weight and good bending performance.

[0040] The battery cell 50 is a structure for converting light energy into electrical energy. The light-receiving surface 51 of the battery cell 50 is used to receive light energy and convert the light energy into electrical energy. The conductive layer 60 is welded to the backlight surface 53 of a plurality of battery cells 50. The conductive layer 60 is used to connect the positive and negative electrodes of adjacent battery cells 50. Moreover, the conductive layer 60 is also used to transmit the electrical energy generated in the plurality of battery cells 50 to the circuit, so that the curved photovoltaic component 100 can supply power to other components. Preferably, the conductive layer 60 is made of a metal material, and the metal material includes, but is not limited to, silver, copper, etc. The conductive layer 60 can be in a linear or sheet-like structure. The conductive layer 60 in the embodiment of the present application is black. The black conductive layer 60 is connected to the backlight surface 53 of the battery cell 50, so that the curved photovoltaic component 100 can present a uniform black overall, and the aesthetics is better.

[0041] The cell 50 can be a thin-film cell or a crystalline silicon cell, and the cell 50 in this application is a crystalline silicon cell. The cell 50 has a positive electrode and a negative electrode, and both the positive and negative electrodes of the cell 50 are provided on the backlight surface 53 of the cell 50, so that the conductive layer 60 only needs to be connected to the backlight surface 53 of the cell 50. When the conductive layer 60 is disposed on the backlight surface 53 of the cell 50, the light-receiving surface 51 of the cell 50 is not blocked by the conductive layer 60, which can enhance the photoelectric conversion efficiency of the cell 50 and the appearance of the cell 50 is more beautiful.

[0042] In the current curved photovoltaic components, the positive and negative electrodes of the cells used are respectively provided on the light-receiving surface and the backlight surface of the cell, and its conductive layer needs to span the light-receiving surface and the backlight surface of the cell. When the cell is bent, the conductive layer is likely to pull the cell, resulting in a smaller bending arc of the cell or even causing the cell to break. Please refer to Figures 1 to Figure 3 In the curved photovoltaic component 100 of the embodiment of this application, the conductive layer 60 is only provided on the backlight surface 53 of the cell 50. When the cell 50 is bent, the conductive layer 60 will not pull the cell 50, so that the cell 50 can be bent with a larger arc and the risk of the cell 50 breaking can be reduced.

[0043] In the curved photovoltaic component 100 of the embodiment of this application, the conductive layer 60 is only provided on the backlight surface 53 of the cell 50, and the light-receiving surface 51 is not provided with the conductive layer 60. Therefore, the contact area between the light-receiving surface 51 and the light is larger, the utilization rate of light by the cell 50 is higher, and the power generation efficiency of the curved photovoltaic component 100 is higher. Moreover, since the conductive layer 60 is provided on the same side of the cell 50, the cell 50 as a whole can be bent with a larger arc, and the curved photovoltaic component 100 also has a larger bending arc. Compared with the current curved photovoltaic components, the curved photovoltaic component 100 of the embodiment of this application has a larger curved arc, the curved photovoltaic component 100 can have a better fit with the building, and the overall aesthetics of the curved photovoltaic component 100 is better.

[0044] The curved photovoltaic component 100 will be further described below with reference to the drawings.

[0045] Please refer to Figure 1 In some embodiments, the front plate 10, the cell 50, and the back plate 90 are all curved surfaces with the same shape. Specifically, the bending arcs of the front plate 10, the cell 50, the conductive layer 60, and the back plate 90 are the same, and the bending radii of the front plate 10, the cell 50, the conductive layer 60, and the back plate 90 are equal. A complete fit can be achieved between the front plate 10 and the light-receiving surface 51 of the cell 50, between the conductive layer 60 and the backlight surface 53 of the cell 50, and between the conductive layer 60 and the back plate 90.

[0046] Please refer to Figure 1, as described above, the front plate 10, the solar cell 50, and the back plate 90 are all curved surfaces with the same shape. In some embodiments, the longitudinal projection of the curved surface is a curve formed by a curve segment, as Figure 2 shown. At this time, the curved surface photovoltaic device 100 has a smaller volume and lighter weight, which is convenient for handling. In other embodiments, the longitudinal projection of the curved surface is a curve formed by multiple curve segments connected in sequence, as Figure 1 shown. At this time, the curve formed by the multiple curve segments is wavy, and the curved surface photovoltaic device 100 has a larger volume, and it is more convenient to assemble and build the curved surface photovoltaic device 100 on a building. In still other embodiments, the longitudinal projection of the curved surface is a special-shaped curve formed by a curve segment and a straight segment, as Figure 3 shown. At this time, the bending radius of the solar cell 50 is the bending radius at the place with the largest bending in the curved surface shape, and the special-shaped curve is formed by connecting the curve segment and the straight segment in sequence. The curved surface photovoltaic device 100 is overall more beautiful, and the installation between multiple curved surface photovoltaic devices 100 is more stable.

[0047] Regardless of which of the above embodiments the curve is, the curve segment is an arc, and the ratio of the arc length of the curve segment to the corresponding chord length ranges from [1.03, 1.67]. For example, the ratio of the arc length of the curve segment to the corresponding chord length can be 1.03, 1.07, 1.11, 1.15, 1.19, 1.23, 1.25, 1.28, 1.31, 1.36, 1.41, 1.45, 1.47, 1.54, 1.58, or 1.67, etc. The curve of the longitudinal projection of the front plate 10 has the same shape as the curves of the longitudinal projections of the solar cell 50, the conductive layer 60, and the back plate 90. The ratio of the arc length of the curve segment of the front plate 10 to the corresponding chord length is the same as the ratios of the arc lengths of the curve segments of the solar cell 50, the conductive layer 60, and the back plate 90 to the corresponding chord lengths.

[0048] When the ratio of the arc length of the curve segment to the corresponding chord length is less than 1.03, the bending radian of the curved surface photovoltaic device 100 is not obvious enough, the degree of fitting with the building is not high, and the aesthetics is not good enough. When the ratio of the arc length of the curve segment to the corresponding chord length is greater than 1.67, the bending radian of the curved surface photovoltaic device 100 is too large, which easily causes the curved surface photovoltaic device 100 to break. When the ratio of the arc length of the curve segment to the corresponding chord length is in the range of [1.03, 1.67], the bending radian of the curved surface photovoltaic device 100 is more obvious, the degree of fitting with the building is higher, and the aesthetics is better. At the same time, the curved surface photovoltaic device 100 is not easily broken.

[0049] Please refer to Figure 1, in some embodiments, the bending radius of the solar cell 50 ranges from [25 mm, 200 mm]. Herein, the bending radius of the solar cell 50 refers to the bending radius of each curved segment. At this time, the bending radius of the solar cell 50 can be 25 mm, 38.6 mm, 43.7 mm, 50 mm, 63.4 mm, 70.8 mm, 81.3 mm, 98.7 mm, 101 mm, 109.2 mm, 112.5 mm, 120.9 mm, 136.7 mm, 162.1 mm, 200 mm, etc.

[0050] Specifically, when the bending radius of the solar cell 50 is less than 25 mm, the solar cell 50 is prone to the risk of fragmentation. When the bending radius of the solar cell 50 is greater than 200 mm, the bending curvature of the solar cell 50 is not obvious enough, the aesthetics is not good enough, and the degree of fit with the building is not high either. When the bending radius of the solar cell 50 ranges from [25 mm, 200 mm], the bending curvature of the solar cell 50 is more obvious, the aesthetics is better, the degree of fit with the building is higher, and at the same time, the solar cell 50 is not easily fragmented.

[0051] Please continue to refer to Figure 1 , in some embodiments, when the longitudinal projection of the curved surface is a curve composed of multiple successively connected curved segments, the bending directions of adjacent two curved segments are opposite, and the bending radii of the multiple curved segments are the same. For example, when the first curved segment of the curved surface photovoltaic device 100 is in the shape of a parabola opening upward (the middle of this curved segment is concave downward), the second curved segment adjacent to the first curved segment is in the shape of a parabola opening downward (the middle of this curved segment is convex upward), the third curved segment adjacent to the second curved segment is again in the shape of a parabola opening upward (the middle of this curved segment is concave downward), the fourth curved segment adjacent to the third curved segment is in the shape of a parabola opening downward (the middle of this curved segment is convex upward), and so on. The shape of the curve composed of multiple curved segments is wavy. And the bending radius of each curved segment is the same. For example, the bending radius of the first curved segment is 70.8 mm, and the bending radii of the second curved segment, the third curved segment, and the remaining curved segments are also 70.8 mm. Or, the bending radius of the first curved segment is 120 mm, and the bending radii of the second curved segment, the third curved segment, and the remaining curved segments are also 120 mm.

[0052] Please refer to Figure 3, in some other embodiments, when the longitudinal projection of the curved surface is a special-shaped curve composed of curved segments and straight segments, the bending directions of the multiple curved segments are the same, and the bending radii of the multiple curved segments are the same. For example, the multiple curved segments are all in a shape similar to a parabola opening downward (the middle of the curved segment bulges upward), and adjacent two curved segments are connected by a straight segment. The bending radii of the multiple curved segments can be, but are not limited to, 63.4 mm, 70.8 mm, 76.8 mm, 81.3 mm, 83.5 mm, 91.6 mm, etc.

[0053] Please refer to Figure 1 , in some embodiments, the thickness of the battery cell 50 ranges from [20 μm, 190 μm]. For example, the thickness of the battery cell 50 can be 20 μm, 41.6 μm, 50.7 μm, 65.1 μm, 73 μm, 96.2 μm, 105.3 μm, 115 μm, 126.4 μm, 142.8 μm, 151.3 μm, 165.4 μm, 174 μm, 187.1 μm, or 190 μm, etc. Among them, the thinner the battery cell 50, the better the bending performance of the battery cell 50. Currently, the thinnest battery cell 50 that can be achieved in the industry has a thickness of 20 μm. When the thickness of the battery cell 50 is greater than 190 μm, the battery cell 50 is relatively thick and the bending performance is not good enough. Therefore, when the thickness of the battery cell 50 ranges from [20 μm, 190 μm], the battery cell 50 is thinner and has better bending performance.

[0054] Please refer to Figure 1 , in some embodiments, each battery cell 50 is a whole-piece battery cell 50, or each battery cell 50 is a whole-piece corresponding multi-slice battery cell 50.

[0055] Specifically, in one embodiment, the solar cells 50 are all whole solar cells 50. At this time, the processing of the solar cells 50 is relatively simple. In another embodiment, the solar cells 50 are all whole corresponding to multi-slice solar cells 50. Specifically, one solar cell 50 is composed of multiple slices. At this time, the solar cell 50 can achieve a larger bending arc. For example, the solar cell 50 can be a two-slice solar cell 50 corresponding to the whole (1 / 2 slice cell: composed of 2 slices), the solar cell 50 can also be a three-slice solar cell 50 corresponding to the whole (1 / 3 slice cell: composed of 3 slices), the solar cell 50 can also be a four-slice solar cell 50 corresponding to the whole (1 / 4 slice: composed of 4 slices), a five-slice solar cell 50 corresponding to the whole (1 / 5 slice: composed of 5 slices), and a six-slice solar cell corresponding to the whole (1 / 6 slice: composed of 6 slices), etc. In the case where one curved segment corresponds to one solar cell 50, if the solar cell 50 is processed into a 1 / 2 slice solar cell 50, the two-slice solar cell 50 can achieve a larger bending arc compared to the whole solar cell 50. And the more slices the whole corresponding to the solar cell 50 has, the larger the bending arc the solar cell 50 can achieve. In an example, multiple solar cells 50 are all solar cells 50 with the same number of slices. For example, multiple solar cells 50 are all 1 / 2 slice solar cells 50, or multiple solar cells 50 are all 1 / 3 slice solar cells 50, or multiple solar cells 50 are all 1 / 4 slice solar cells 50, etc. In another example, multiple solar cells 50 can be solar cells 50 with different numbers of slices. For example, some solar cells 50 are 1 / 2 slice solar cells 50, and some solar cells 50 are 1 / 4 slice solar cells 50. Or some solar cells 50 are 1 / 3 slice solar cells 50, and some solar cells 50 are 1 / 6 slice solar cells 50, etc.

[0056] Please refer to Figures 4 to 6 , the arrangement of multiple solar cells 50 can be: multiple solar cells 50 are arranged in sequence, and there is a gap between adjacent solar cells 50; or, multiple solar cells 50 are arranged in sequence, and there is no gap between adjacent solar cells 50. In some embodiments, there is a gap between adjacent solar cells 50 ( Figure 4 as shown). When there is a gap between adjacent solar cells 50 on the light-receiving surface 51, the bending arc of the solar cell 50 can be larger, and the bending radius of the solar cell 50 can be smaller. When the bending radius of the solar cell 50 is smaller, due to the gap between adjacent solar cells 50, there will be no problem of interference between adjacent solar cells 50 causing the solar cell 50 to break.

[0057] Among them, since the conductive layer 60 is welded to the backlight surface 53 of a plurality of solar cells 50, when there is a gap between adjacent solar cells 50, the welding tape will be exposed from the gap, resulting in uneven color of the overall solar cell 50 and poor aesthetics. In one example, the curved photovoltaic device 100 may further include a shielding member 55. The shielding member 55 is disposed on the light-receiving surface 51 of two adjacent solar cells 50 to shield the gap. The shielding member 55 is used to shield the welding tape for welding the conductive layer 60 to the backlight surface 53 at the gap, so that the entire solar cell 50 presents a uniform black color, which is more aesthetically pleasing as a whole. Preferably, the side of the shielding member 55 away from the light-receiving surface 51 of the solar cell 50 is black, and the shielding member 55 can be made of a flexible material, so that when the solar cell 50 is bent, the shielding member 55 can also deform accordingly, and the problem of the solar cell 50 being broken due to interference with the solar cell 50 can be avoided. For example, the shielding member 55 can be a black tape. When the gap between adjacent solar cells 50 is 5 mm, the width of the shielding member 55 needs to be greater than 5 mm. For example, the width of the shielding member 55 can be 10 mm. When the width of the shielding member 55 is greater than the width of the gap, the shielding member 55 can cover the welding tape and can also be firmly connected to the two solar cells 50, thereby avoiding the problem of the shielding member 55 falling off due to unstable adhesion to the solar cell 50. Of course, in other examples, the curved photovoltaic device 100 may not include the shielding member 55. In another example, the exposed welding tape between adjacent solar cells 50 is shielded by black screen printing, so that the entire solar cell 50 presents a uniform black color, which is more aesthetically pleasing as a whole. In still another example, the curved photovoltaic device 100 may also use black welding tape. When there is a gap between adjacent solar cells 50, the black welding tape is exposed from the gap, so that the entire solar cell 50 presents a uniform black color, which is more aesthetically pleasing as a whole.

[0058] In some other embodiments, there is no gap between adjacent solar cells 50 ( Figure 5 and Figure 6 as shown). When there is no gap between adjacent solar cells 50, there is no need to provide a Figure 2 shielding member 55 as shown between the solar cells 50. In this way, materials can be saved, and the processing technology of the product is relatively simple. Moreover, since there is no Figure 2 shielding member 55 as shown covering a part of the light-receiving surface 51 of the solar cell 50, the area of the light-receiving surface 51 of the solar cell 50 in this embodiment in contact with light is larger, the photoelectric conversion rate of the solar cell 50 is higher, and the power generation loss of the solar cell 50 is less. In one example, two adjacent solar cells 50 are seamlessly spliced ( Figure 5 as shown). In another example, the light-receiving surface 51 of one of the two adjacent solar cells 50 and the backlight surface 53 of the other solar cell 50 are seamlessly overlapped ( Figure 6As shown. Preferably, the overlapping width of the light-receiving surface 51 of one cell 50 and the backlight surface 53 of another cell 50 can be in the range of (0 mm, 1 mm]. For example, the overlapping width of the light-receiving surface 51 of one cell 50 and the backlight surface 53 of another cell 50 can be 0.11 mm, 0.23 mm, 0.35 mm, 0.4 mm, 0.51 mm, 0.67 mm, 0.74 mm, 0.8 mm, 0.91 mm, or 1 mm, etc. When the overlapping width of the light-receiving surface 51 of one cell 50 and the backlight surface 53 of another cell 50 is greater than 1 mm, the width of the light-receiving surface 51 of one cell 50 blocked by another cell 50 is relatively large, resulting in a relatively large loss of power generation of the cell 50. When the overlapping width of the light-receiving surface 51 of one cell 50 and the backlight surface 53 of another cell 50 is in the range of (0 mm, 1 mm], there is no gap between the two cells 50, and the width of the light-receiving surface 51 of one cell 50 blocked by another cell 50 is relatively small, resulting in a relatively small loss of power generation of the cell 50.

[0059] Please refer to Figure 1 , further, in some embodiments, the curved photovoltaic device 100 further includes a first adhesive layer 30 and a second adhesive layer 70. The first adhesive layer 30 is used to connect the front plate 10 and the cell 50, and the second adhesive layer 70 is used to connect the cell 50, the conductive layer 60, and the back plate 90. Among them, the first adhesive layer 30 can transmit light.

[0060] Specifically, the first adhesive layer 30 is used to closely connect the front plate 10 and the light-receiving surface 51 of the cell 50, and the second adhesive layer 70 is used to closely connect the backlight surface 53 welded with the conductive layer 60 and the back plate 90. Preferably, the first adhesive layer 30 can be an optically transparent adhesive, so that when light passes through the front plate 10 and the first adhesive layer 30 and reaches the cell 50, the loss of light passing through the first adhesive layer 30 is relatively small. For example, the light transmittance of the first adhesive layer 30 is greater than or equal to 70%, and the light transmittance of the first adhesive layer 30 can be 70%, 72.5%, 76.8%, 79.4%, 81%, 83.6%, 85.4%, 87.1%, 91.2%, 94.7%, 95.8%, 97.4%, or 100%, etc. Among them, the optically transparent adhesive includes but is not limited to ethylene vinyl acetate (EVA), polyolefin elastomer (POE), polyvinyl butyral (PVB), silica gel, etc.

[0061] In one embodiment, the second adhesive layer 70 is light-impermeable, and the back plate 90 is light-transmissive. The second adhesive layer 70 can be a black adhesive film or a transparent cutoff adhesive film. Among them, the black adhesive film is almost light-impermeable, and the light transmittance of the transparent cutoff adhesive film is less than or equal to 30%. The back plate 90 can be made of light-transmissive glass or a light-transmissive PET material. Preferably, the second adhesive layer 70 is a black adhesive film so that the curved photovoltaic component 100 can present a uniform black overall, and the aesthetic property is better. In another embodiment, the back plate 90 is light-impermeable, and the second adhesive layer 70 is light-transmissive. At this time, the back plate 90 can be made of a black material, and the black back plate 90 is almost light-impermeable. The second adhesive layer 70 can be a light-transmissive adhesive film so that the curved photovoltaic component 100 can present a uniform black overall, and the aesthetic property is better. In still another embodiment, both the second adhesive layer 70 and the back plate 90 are light-impermeable. At this time, the second adhesive layer 70 can be a black adhesive film or a transparent cutoff adhesive film, and the back plate 90 can be made of a black material so that the curved photovoltaic component 100 can present a uniform black overall, and the aesthetic property is better. In an example, the second adhesive layer 70 is a black adhesive film, and the back plate 90 is made of a black material. In another example, the second adhesive layer 70 is a transparent cutoff adhesive film, and the back plate 90 is made of a black material. In yet another embodiment, both the second adhesive layer 70 and the back plate 90 are light-transmissive. At this time, the second adhesive layer 70 can be a transparent adhesive film, and the back plate 90 can be made of a transparent material.

[0062] Please refer to Figure 7 , the photovoltaic building surface 1000 of the embodiment of the present application includes a plurality of curved photovoltaic components 100 of any one of the above embodiments, and the adjacent curved photovoltaic components 100 are connected to each other. In the case where product waterproofing is required, compared with flat photovoltaic components, when adjacent curved photovoltaic components 100 are overlapped, the overlapping area required is smaller, the contact area between the curved photovoltaic components 100 and light is larger, and the photoelectric conversion efficiency is higher.

[0063] In the curved photovoltaic component 100 of the embodiment of the present application, the conductive layer 60 is only disposed on the backlight surface 53 of the battery cell 50, and the conductive layer 60 is not disposed on the light-receiving surface 51. Therefore, the contact area between the light-receiving surface 51 and light is larger, the utilization rate of light by the battery cell 50 is higher, and the power generation efficiency of the curved photovoltaic component 100 is higher. And because the conductive layer 60 is disposed on the same side of the battery cell 50, the overall curvature that the battery cell 50 can bend is larger, and the bending curvature of the curved photovoltaic component 100 is also larger. Compared with the current curved photovoltaic components, the curved photovoltaic component 100 of the embodiment of the present application has a larger curved surface curvature, the curved photovoltaic component 100 can have a better fit with the building, and the overall aesthetic property of the curved photovoltaic component 100 is better.

[0064] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered to be within the scope described in this specification. At the same time, other embodiments can be derived from the above embodiments, so that structural and logical substitutions and changes can be made without departing from the scope of the present disclosure.

[0065] The above-described embodiments merely represent several implementation manners of the present application. The description thereof is relatively specific and detailed, but it should not be construed as a limitation to the scope of the patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.

Claims

1. A curved photovoltaic component, characterized in that, it includes: a battery cell, the battery cell having an opposite light-receiving surface and a backlight surface; a front plate, the front plate being located on one side of the light-receiving surface; a conductive layer, the conductive layer being electrically connected to the battery cell, the conductive layer being located on one side of the backlight surface; a back plate, the back plate being located on the side of the conductive layer away from the battery cell, the front plate, the battery cell, the conductive layer, and the back plate being stacked in sequence.

2. The curved photovoltaic component according to claim 1, characterized in that, the front plate, the battery cell, and the back plate are all curved.

3. The curved photovoltaic component according to claim 2, characterized in that, the value range of the bending radius of the battery cell is [25 mm, 200 mm].

4. The curved photovoltaic component according to claim 2, characterized in that, the longitudinal projection of the curved surface is a curve composed of a section of curve, or the longitudinal projection of the curved surface is a curve composed of multiple sections of sequentially connected curve segments, or the longitudinal projection of the curved surface is a special-shaped curve composed of a curve segment and a straight line segment, the curve segment is an arc, and the value range of the ratio of the arc length of the curve segment to the corresponding chord length is [1.03, 1.67].

5. The curved photovoltaic component according to claim 4, characterized in that, in the case where the longitudinal projection of the curved surface is a curve composed of multiple sections of sequentially connected curve segments, the bending directions of adjacent two curve segments are opposite, and the bending radii of multiple curve segments are the same; in the case where the longitudinal projection of the curved surface is a special-shaped curve composed of a curve segment and a straight line segment, the bending directions of multiple curve segments are the same, and the bending radii of multiple curve segments are the same.

6. The curved photovoltaic component according to claim 1, characterized in that, the battery cell has a positive electrode and a negative electrode, the positive electrode and the negative electrode are both arranged on the backlight surface, and the conductive layer connects the positive electrode and the negative electrode of adjacent battery cells.

7. The curved photovoltaic component according to claim 1, characterized in that, the battery cell is a whole battery cell or the battery cell is a whole corresponding multi-sectioned battery cell.

8. The curved photovoltaic component according to claim 1, characterized in that, there is a gap between multiple battery cells, the curved photovoltaic component further includes a shielding member, and the shielding member is arranged on the light-receiving surfaces of two adjacent battery cells and shields the gap.

9. The curved photovoltaic component according to claim 1, characterized in that, two adjacent battery cells are seamlessly spliced; or one of the light-receiving surfaces of two adjacent battery cells and the other backlight surface are seamlessly overlapped.

10. The curved photovoltaic component according to claim 1, characterized in that, the curved photovoltaic component further includes a first adhesive layer and a second adhesive layer, the first adhesive layer is used to connect the front plate and the battery cell, and the second adhesive layer is used to connect the battery cell, the conductive layer, and the back plate.

11. The curved photovoltaic component according to claim 1, characterized in that, the conductive layer is black.

12. A photovoltaic building surface, characterized in that, Including a plurality of curved photovoltaic components according to any one of claims 1-11, and adjacent curved photovoltaic components are connected to each other.

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