Curved solar power generation components and solar building surfaces

Abstract

To solve the problem that a current generated in a battery piece that is irradiated with light with low intensity in a battery string is small, and the battery piece may reduce the output current of the battery string. [Solution] A curved solar power generating element (100) comprises a battery string (10), at least one wave ridge (101) and at least one wave valley (103), the battery string (10) having a plurality of battery pieces (11) connected in series, the plurality of battery pieces (11) arranged along a first direction of the curved solar power generating element, and in the first direction, each battery piece (11) in one battery string (10) covers a wave ridge (101) and is arranged symmetrically along the axis of the first direction with respect to the wave ridge (101).

Description

[Technical Field]

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS This application claims priority to a patent filed in China on December 25, 2023 (application number 202323572059.1), the entire disclosure of which is incorporated herein by reference.

[0002] This application relates to the technical field of solar cells, and in particular to curved photovoltaic components and solar building surfaces. [Background technology]

[0003] As solar cell integration in buildings becomes increasingly common, photovoltaic elements (solar roofing elements) have emerged to replace traditional roofing tiles and better integrate with architectural surfaces. Photovoltaic elements can be made flat or curved, and compared to flat elements, curved elements offer both aesthetic appeal and power generation functionality due to their unique shape. Currently, curved photovoltaic elements typically include one or more battery strings, each consisting of multiple battery strips connected in series. However, because the battery strips in a single battery string are positioned at different locations on the curved photovoltaic element, the battery strips in a single battery string experience different levels of light irradiation over the same period. This can result in smaller currents generated by battery strips exposed to lower levels of light irradiation, potentially reducing the output current of the battery string. Summary of the Invention [Problem to be solved by the invention]

[0004] The present application aims to propose a curved solar power generating element and a solar cell building surface to at least solve the problem that the light irradiation intensities received by multiple battery pieces in a battery string during the same period are different, and that the current generated in battery pieces that receive low irradiation intensities is small, which may result in a decrease in the output current of the battery string. [Means for solving the problem]

[0005] A curved solar-powered element according to an embodiment of the present application includes at least one battery string. The battery string includes a plurality of battery segments connected in series, and the battery segments are arranged along a first direction of the curved solar-powered element. The curved solar-powered element further includes at least one wave crest and at least one wave trough, and in the first direction, each of the battery segments in the battery string covers the wave crest and is arranged symmetrically along an axis of the first direction with respect to the wave crest.

[0006] In some embodiments, the relative ends of the battery strips in the second direction extend toward the lowest point of the wave trough, the second direction is an extension direction of a tangent line of the highest point of the wave crest, and the second direction intersects with the first direction.

[0007] In some embodiments, a gap is formed separating two adjacent battery rows in the second direction, and the width of the gap is in the range of [3 mm, 5 mm].

[0008] In some embodiments, the difference in the irradiation intensity of light received by any two of the battery segments in one of the battery strings falls within a preset range.

[0009] In some embodiments, the ratio of the arc length to the chord length of the curved photovoltaic element is in the range of [1.03, 1.06].

[0010] In some embodiments, the length of the battery strip in the second direction is positively correlated with the amount of deformation the battery strip can withstand when bending to conform to the shape.

[0011] In some embodiments, the thickness of the battery strip in the second direction is inversely related to the amount of deformation the battery strip can withstand when bent to conform to shape.

[0012] In some embodiments, in the second direction, the length of the battery strip is positively correlated with the amount of deformation the battery strip can withstand when bent to shape, and the thickness of the battery strip is negatively correlated with the amount of deformation the battery strip can withstand when bent to shape.

[0013] In some embodiments, the curved photovoltaic element further comprises a front plate and a back plate, and the front plate, the battery array and the back plate are stacked in sequence.

[0014] In some embodiments, the front plate is curved, the battery string conforms to the shape of the front plate, and the arch height of the front plate is less than or equal to the maximum deformation that the battery strips can withstand when conforming to the shape of the front plate.

[0015] In some embodiments, the back plate is curved, the battery string bends to shape with the back plate, and the arch height of the back plate is less than or equal to the maximum deformation that the battery string can withstand when bending to shape.

[0016] In some embodiments, the front plate is curved, the battery array bends with the front plate, and the arch height of the front plate is less than or equal to the maximum deformation that the battery segments can withstand when bending to a shape; and the back plate is curved, the battery array bends with the back plate, and the arch height of the back plate is less than or equal to the maximum deformation that the battery segments can withstand when bending to a shape.

[0017] In some embodiments, the curved photovoltaic element further comprises an adhesive film layer, which is used to adhere the front plate to the battery string and the battery string to the back plate.

[0018] The solar cell building surface according to the present application comprises the curved photovoltaic member. [Effects of the Invention]

[0019] In the curved solar photovoltaic element and solar-powered architectural surface according to the present embodiment, the plurality of battery pieces in one battery string are arranged along a first direction of the curved solar photovoltaic element, and each battery piece in one battery string covers the wave crest and is arranged symmetrically along the axis of the first direction with respect to the wave crest, so that the light irradiation intensity received by the plurality of battery pieces during the same period is generally the same, and the current output from the battery string is large. Compared to existing curved solar photovoltaic elements, the light irradiation intensity received by the plurality of battery pieces in the battery string of the present application is generally the same, which solves the problem that the current generated by a battery piece in a battery string that is exposed to low light irradiation intensity is small, which may reduce the output current of the battery string.

[0020] Additional aspects and advantages of the present application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the present application. [Brief explanation of the drawings]

[0021] The above and / or additional aspects and advantages of the present invention will become more apparent and easier to understand in conjunction with the following description of the embodiments in conjunction with the drawings. [Figure 1] FIG. 1 is a three-dimensional view of a battery string and a backplate according to some embodiments of the present application. [Figure 2] FIG. 2 is a structural diagram of the battery array and back plate of FIG. [Figure 3] FIG. 3 is a structural diagram of the battery array and back plate of FIG. [Figure 4] FIG. 4 is an exploded view of a curved photovoltaic element according to some embodiments of the present application. [Figure 5] FIG. 5 is a three-dimensional view of a solar building surface according to some embodiments of the present application. DETAILED DESCRIPTION OF THE INVENTION

[0022] In order to make the above-mentioned objects, features and advantages of the present application more clearly understood, we will now describe in detail specific embodiments of the present application in combination with the drawings. In the following description, many details will be described in order to fully understand the present application. However, the present application can be implemented in many other ways different from this description, and those skilled in the art may make similar improvements without departing from the spirit of the present application, so the specific examples disclosed below do not limit the present application.

[0023] In the description of this application, terms such as "center," "length," "width," "length," "thickness," "width," "top," "bottom," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inside," "outside," "clockwise," "counterclockwise," etc., represent directions or positional relationships based on directions or positional relationships shown in the drawings, and are used merely for the convenience and simplification of the description of this application, and do not expressly or imply that the referred-to devices or elements must be located in a particular direction or configured or operate according to a particular direction, and it should be understood that this should not be construed as a limitation on the scope of protection of the present invention.

[0024] Furthermore, terms such as "first" and "second" are used for descriptive purposes only and should not be understood to express or imply relative importance or the number of technical features. Thus, technical features qualified by "first" and "second" may express or imply the inclusion of one or more of such features. In the description of this invention, unless otherwise specified, "plurality" means two or more, e.g., two, three, etc., unless otherwise expressly limited.

[0025] In this application, unless otherwise specified or limited, the terms "attach," "connect," "couple," and the like should be interpreted broadly, for example, to mean fixedly connected, detachably connected, integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected via an intermediate medium, or to refer to an internal communication between two elements or a mutual relationship between two elements. Those skilled in the art will be able to understand the specific meaning of the above terms in the present invention depending on the specific situation.

[0026] In this application, unless otherwise specified, when a first feature is located "above" or "below" a second feature, the first feature may be in direct contact with the second feature, or the first feature may be in indirect contact with the second feature via an intermediate medium. Furthermore, when a first feature is located "above," "above," or "on top" of a second feature, the first feature may be located directly above or diagonally above the second feature, or the height of the first feature may be higher than that of the second feature. When a first feature is located "above," "below," or "below" a second feature, the first feature may be located directly below or diagonally below the second feature, or the height of the first feature may be lower than that of the second feature.

[0027] It should be clarified that when one member is "fixed" or "mounted" to another member, the member may be directly on the other member or may be connected to an intermediate member. When one member is "connected" to another member, the member may be directly connected to the other member or may be connected to the other member via an intermediate member. The terms "vertical," "horizontal," "up," "down," "left," "right," and similar terms used herein are for illustrative purposes only and do not represent the only embodiment.

[0028] As solar cell integration in buildings becomes increasingly common, photovoltaic elements (solar roofing elements) have emerged to replace traditional roofing tiles and better integrate with architectural surfaces. Photovoltaic elements can be flat or curved. Compared to flat elements, curved elements offer both aesthetic appeal and power generation functionality due to their unique shape. Currently, curved photovoltaic elements typically include one or more cell strings, each consisting of multiple cell strips connected in series. However, because the cell strips in a cell string are positioned at different locations on the curved photovoltaic element, the cell strips in a cell string may experience different levels of light irradiation over the same period. This can result in lower current generation in cell strips exposed to lower levels of light irradiation, potentially reducing the output current of the cell string. To address the above issues, the present application presents a curved photovoltaic element 100 (FIG. 4) and a solar-powered building surface 1000 (FIG. 5).

[0029] 1 , a curved solar photovoltaic element 100 according to an embodiment of the present application includes at least one battery string 10. The battery string 10 includes a plurality of battery pieces 11 connected in series, and the plurality of battery pieces 11 are arranged along a first direction X of the curved solar photovoltaic element 100. The curved solar photovoltaic element 100 further includes at least one wave ridge 101 and at least one wave valley 103, and each of the battery pieces 11 in one battery string 10 covers the wave ridge 101 in the first direction X and is arranged symmetrically with respect to the wave ridge 101 along the axis of the first direction X.

[0030] Specifically, the curved solar photovoltaic element 100 can be used to convert light energy into electrical energy to power other components, as well as to serve as a structural element for buildings. For example, the curved solar photovoltaic element 100 can power appliances, energy storage power supplies, street lights, and other equipment. The curved solar photovoltaic element 100 can be used to both generate electricity and maintain the aesthetics of a building.

[0031] As shown in FIG. 1 , the battery string 10 receives light energy and converts it into electricity. The generated electrical energy can be transmitted to other circuits, allowing the curved solar photovoltaic element 100 to charge other components. The battery string 10 has a light-receiving surface 15 and a light-receiving surface 17. Light enters the battery string 10 through the light-receiving surface 15. The number of battery strings 10 in the curved solar photovoltaic element 100 can be one, two, three, four, or more. When there is only one battery string 10, the electrical energy generated in one battery string 10 is output to charge other components. When there are multiple battery strings 10, the multiple battery strings 10 are connected in parallel and / or series, and the generated electrical energy is output to charge other components. For example, when multiple battery strings 10 are connected in parallel, the output current of the curved solar photovoltaic element 100 increases. For example, when multiple battery strings 10 are connected in series, the output voltage of the curved photovoltaic component 100 increases.

[0032] As shown in FIG. 1 , a battery string may include two, three, or four or more battery pieces 11, with multiple battery pieces connected in series to form a series circuit. The battery pieces 11 are configured to receive light energy and convert it into electrical energy. The positive and negative electrodes of the battery pieces 11 may be disposed on the light-receiving surface 15 and the backlight surface 17, respectively, or both the positive and negative electrodes of the battery pieces 11 may be disposed on the backlight surface 17. In one embodiment, the positive and negative electrodes of the battery pieces 11 are disposed on the light-receiving surface 15 and the backlight surface 17, respectively. In this case, the battery pieces 11 may be a Passivated Emitter and Rear Cell (PERC) or a Tunnel Oxide Passivated Contact solar cell (TOPCON), etc. In another embodiment, both the positive and negative electrodes of the battery pieces 11 are disposed on the backlight surface 17. In this case, the cell strip 11 may be an interdigitated back contact solar cell (IBC), an all back contact solar cell (ABC), a hybrid passivated back contact solar cell (HPBC), a metallization wrap-through solar cell (MWT), or the like.

[0033] As shown in FIG. 1 , the number of wave crests 101 of the curved photovoltaic element 100 can be, but is not limited to, one, two, three, four, or more. The number of wave troughs 103 of the curved photovoltaic element 100 can be, but is not limited to, one, two, three, four, or more. The number of wave crests 101 can be the same as or different from the number of wave troughs 103. For example, if the number of wave crests 101 is two, the number of wave troughs 103 can be one, two, or three. If the number of wave crests 101 is three, the number of wave troughs 103 can be two, three, or four. The radius of the wave crests 101 and the radius of the wave troughs 103 can be the same as or different from each other.

[0034] Currently, in most curved solar photovoltaic components 100, the cell strings are arranged as follows: multiple cell segments in one cell string are arranged along the second direction. In this case, multiple cell segments in one cell string can be arranged at the wave crest and wave trough positions, respectively. For example, a wave crest has a peak and two opposite sides connecting the peak, and cell segments A, B, and C are arranged on one side of the wave crest, the peak, and the other side of the wave crest, respectively. During the same period, cell segments A, B, and C receive different light irradiation intensities. When cell segment A receives the highest light irradiation intensity, the current generated by cell segment A is a value a. At this time, cell segment B receives the next lowest light irradiation intensity, and the current generated by cell segment B is a value b. When cell segment C receives the lowest light irradiation intensity, the current generated by cell segment C is a value c. The order of magnitude of the current generated by the three cell segments is a>b>c. Since the battery string is a series circuit, the current output from this battery string is a value c, and the output current of the entire battery string is small.

[0035] As shown in FIG. 1 , each battery element 11 in the battery string 10 of the present application covers the wave ridge 101. When the battery elements 11 cover the wave ridge 101, they do not shield the surface of the battery element 11, increasing the intensity of light received by the battery element 11. This allows the battery element 11 to generate a large current and thus increase the output current of the battery string 10. Preferably, the battery elements 11 are arranged symmetrically along the axis of the first direction X with respect to the wave ridge 101. This allows each battery element 11 to receive a consistent intensity of light even when the angle of sunlight shining on the curved solar power generating element 100 is different at different times. In addition, the difference in the intensity of light received by the battery elements 11 at different times is not too large, so that the current output from the battery string 10 at each time is relatively stable (the magnitude of the output current does not change significantly over time). This prevents the current generated by some battery elements 11 from being significantly smaller than the current generated by the remaining battery elements 11, thereby reducing the output current of the battery string 10.

[0036] Furthermore, because the battery pieces 11 are arranged on the wave ridges 101 along the first direction X, when the curved solar photovoltaic component 100 is assembled, the battery pieces 11 must bend to conform to the shape of the wave ridges 101 of the front panel 30 and / or back panel 50 (shown in FIG. 4 ) of the curved solar photovoltaic component 100, resulting in a large deformation of the battery pieces 11. If the battery pieces 11 are arranged symmetrically along the axis of the first direction X with respect to the wave ridges 101, the force applied to the left and right sides of the battery pieces 11 when bending and deforming in the first direction X is relatively uniform, thereby making the battery pieces 11 less likely to break during the deformation process. In addition, the maximum deformation that the same battery pieces 11 can withstand when bending along the wave ridges 101 is greater than the maximum deformation that they can withstand when bending along the wave troughs 103. Therefore, when the battery pieces 11 cover the wave ridges 101, the deformation D that the battery pieces 11 can withstand is larger, thereby making the battery pieces 11 less likely to break.

[0037] In the curved solar photovoltaic element 100 according to the embodiment of the present application, the multiple battery pieces 11 in one battery string 10 are arranged along the first direction of the curved solar photovoltaic element, and each battery piece 11 in one battery string 10 covers the wave ridge 101 and is arranged symmetrically along the axis of the first direction with respect to the wave ridge 101, so that the multiple battery pieces 11 receive light with roughly the same intensity during the same period, resulting in a large current output from the battery string 10. Compared to existing curved solar photovoltaic elements 100, the multiple battery pieces 11 in the battery string 10 of the present application receive light with roughly the same intensity, which solves the problem that the current generated by a battery piece 11 in the battery string 10 that receives light with a low intensity is small, which can cause this battery piece 11 to reduce the output current of the battery string 10.

[0038] We further describe the curved photovoltaic element 100 in combination with the drawings.

[0039] As shown in FIGS. 1-2 , in some embodiments, the relative ends of the cell strips 11 in the second direction Y extend toward the lowest points of the wave troughs 103, and the second direction is an extension direction of the tangent line of the highest points of the wave crests, and the second direction intersects with the first direction. The first direction X in this application is perpendicular to the second direction Y. This allows the cell strips 11 to cover as many curved solar photovoltaic elements 100 as possible, and the arrangement of the cell strips 11 can avoid wasting space in the curved solar photovoltaic element 100, thereby improving the power generation efficiency per area. When one cell string 10 covers one wave crest 101, the relative ends of the cell strips 11 in each cell string 10 extend toward the lowest points of the wave troughs 103, which reduces the spacing between adjacent cell strings 10 and allows multiple cell strings 10 to be arranged closely together across the entire curved solar photovoltaic element 100, improving the power generation efficiency per area of ​​the curved solar photovoltaic element 100.

[0040] 1-2 , in some embodiments, two adjacent battery strings 10 are separated in the second direction Y by a gap 13, and the width of the gap 13 ranges from 3 mm to 5 mm. For example, the width of the gap 13 can be 3 mm, 3.3 mm, 3.8 mm, 4.2 mm, 4.4 mm, 4.7 mm, 5.1 mm, 5.5 mm, 5.6 mm, or 5 mm.

[0041] Because the battery segments 11 are conductive, if there is no gap 13 between two adjacent battery segments 10, or if the width of the gap 13 is less than 3 mm, the battery segments 11 of the two adjacent battery segments 10 may come into contact with each other, causing electrical conduction and potentially creating a short circuit between the adjacent battery segments 10. If the width of the gap 13 is greater than 5 mm, the gap 13 between the two adjacent battery segments 10 is too large, resulting in wasted space in the curved solar photovoltaic element 100 and thereby reducing the power generation efficiency per area of ​​the curved solar photovoltaic element 100. If the width of the gap 13 is within the range of [3 mm, 5 mm], the two adjacent battery segments 10 will not come into contact with each other and cause electrical conduction. Furthermore, if the gap 13 between the two adjacent battery segments 10 is not too large, it will not result in wasted space in the curved solar photovoltaic element 100, thereby improving the power generation efficiency per area of ​​the curved solar photovoltaic element 100.

[0042] As shown in FIGS. 1-2 , in some embodiments, when multiple battery pieces 11 in a battery string 10 are arranged along a first direction X, the difference in the irradiance of light received by any two battery pieces 11 in the battery string 10 falls within a preset range. The difference in the irradiance of light received by any two battery pieces 11 falling within the preset range means that the difference in the magnitude of the current generated by any two battery pieces 11 in the battery string 10 after they are exposed to the same or different irradiances during the same time period falls within a predetermined range. For example, the preset range is [0, E] and the predetermined range is [0, F]. If the difference in the irradiance of light received by any two battery pieces 11 in the battery string 10 is smaller than the E value, the difference in the magnitude of the current generated by the two battery pieces 11 will be smaller than the F value. If the difference in the magnitude of the current generated by any two battery pieces 11 in a battery string 10 is smaller than the F value, there is a large difference in the value of the current generated between the two battery pieces 11, and the battery piece 11 with the smaller current can reduce the output current of the battery string 10, thereby reducing the output current of the battery string 10. If the difference in the magnitude of the current generated by any two battery pieces 11 in a battery string 10 is smaller than the F value, there is a small difference in the value of the current generated between the two battery pieces 11, and thereby reducing the output current of the battery string 10.

[0043] As shown in FIG. 1-2 , in some embodiments, the ratio of the arc length to the chord length of the curved photovoltaic element 100 is in the range of [1.03, 1.06]. When assembling the curved photovoltaic element 100, each cell piece 11 must bend and deform to cover the wave crests 101 of the curved photovoltaic element 100 and extend to the lowest point of the wave troughs 103, which increases the deformation of the cell pieces 11. After the cell pieces 11 are bent and deformed, the ratio of the arc length to the chord length of the cell pieces 11 is the same as the ratio of the arc length to the chord length of the curved photovoltaic element 100. When the ratio of the arc length to the chord length of the curved photovoltaic element 100 is in the range of [1.03, 1.06], the cell pieces 11 can bend and deform to a greater extent, and are less likely to break.

[0044] The arc length of the curved photovoltaic element 100 refers to the length L of a straight line along the second direction Y when the curved photovoltaic element 100 is flattened. The chord length of the curved photovoltaic element 100 refers to the length L of a straight line along the second direction Y after the curved photovoltaic element 100 is bent. The arc length of the battery element 11 refers to the length L of a straight line along the second direction Y when the battery element 11 is flattened. The chord length of the battery element 11 refers to the length L of a straight line along the second direction Y after the battery element 11 is bent. For example, the ratio of the arc length to the chord length of the curved photovoltaic element 100 can be 1.03, 1.034, 1.039, 1.042, 1.045, 1.047, 1.051, 1.054, 1.056, or 1.06.

[0045] If the ratio of the arc length to the chord length of the curved photovoltaic element 100 is less than 1.03, i.e., if the ratio of the arc length to the chord length of the battery elements 11 is less than 1.03, the bending deformation D of the battery elements 11 is small, and the bending deformation of the curved photovoltaic element 100 is also small. The bending arc of the curved photovoltaic element 100 is not very noticeable, and the aesthetics are poor. If the ratio of the arc length to the chord length of the curved photovoltaic element 100 is greater than 1.06, i.e., if the ratio of the arc length to the chord length of the battery elements 11 is greater than 1.06, the bending deformation D of the battery elements 11 is too large, making the battery elements 11 more susceptible to breakage. When the ratio of the arc length to the chord length of the curved photovoltaic component 100 is in the range of [1.03, 1.06], i.e., when the ratio of the arc length to the chord length of the battery components 11 is in the range of [1.03, 1.06], the amount of bending deformation of the battery components 11 is large and the battery components 11 are less likely to break. Furthermore, when the amount of bending deformation of the curved photovoltaic component 100 is large and the bending radius of the curved photovoltaic component 100 is large, the aesthetic appearance is also excellent.

[0046] As shown in Figures 3-4, in some embodiments, in the second direction Y, the length L of the battery piece 11 is positively correlated with the amount of deformation D that the battery piece 11 can withstand when bending to conform to the shape, and the thickness W of the battery piece 11 is negatively correlated with the amount of deformation D that the battery piece 11 can withstand when bending to conform to the shape.

[0047] Specifically, the longer the length L of the battery piece 11, the greater the deformation D that the battery piece 11 can withstand when bending according to its shape, making the battery piece 11 less likely to break when bending according to its shape. For example, if there are battery pieces 11 with lengths L of 166 mm, 182 mm, and 210 mm, and if the thickness W of the battery pieces 11 with the three lengths L is the same, the deformation D of the battery piece 11 with a length L of 210 mm will be greater than the deformation D of the battery piece 11 with a length L of 182 mm, which in turn will be greater than the deformation D of the battery piece 11 with a length L of 166 mm.

[0048] Specifically, the thinner the thickness W of the battery piece 11, the greater the deformation D that the battery piece 11 can withstand when bending according to its shape, making the battery piece 11 less likely to break when bending according to its shape. For example, if there are battery pieces 11 with thicknesses W of 190 μm, 170 μm, and 150 μm, and if the lengths L of the battery pieces 11 with the three thicknesses W are the same, the deformation D of the battery piece 11 with a thickness W of 150 μm will be greater than the deformation D of the battery piece 11 with a thickness W of 170 μm, and the deformation D of the battery piece 11 with a thickness W of 170 μm will be greater than the deformation D of the battery piece 11 with a thickness W of 190 μm.

[0049] 4 , in some embodiments, the curved photovoltaic element 100 further includes a front plate 30, an adhesive film layer 70, and a back plate 50, and the front plate 30, the adhesive film layer 70, the battery string 10, the adhesive film layer 70, and the back plate 50 are stacked in this order. The adhesive film layer 70 is used to adhere the front plate 30 to the battery string 10 and also to adhere the battery string 10 to the back plate 50.

[0050] Specifically, the front panel 30 is disposed on the light-receiving surface 15 of the battery string 10, thereby protecting the light-receiving surface 15 of the battery string 10. Preferably, the front panel 30 has a high light transmittance, for example, a light transmittance of 70% or more, which allows most or even all of the light to pass through the front panel 30 and reach the battery string 10, thereby allowing the battery string 10 to convert the received light energy into electrical energy. For example, the light transmittance of the front panel 30 may 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%. The front panel 30 may be a curved rigid front panel 30 or a flexible front panel 30, and the material of the front panel 30 may be, but is not limited to, clear glass or polycarbonate plastic.

[0051] The back plate 50 is a structure for supporting and protecting the backlight surface 17 of the battery string 10. Preferably, the back plate 50 has certain waterproof, insulating, and weatherproof properties, thereby better protecting the backlight surface 17 of the battery string 10. In one embodiment, the back plate 50 may be a curved rigid back plate 50. In this case, the back plate 50 may be made of tempered glass, semi-tempered glass, or the like. The back plate 50 has high strength, thereby better supporting and protecting the battery string 10. In another embodiment, the back plate 50 may be a flexible back plate 50. The flexible back plate 50 bends along with the curved front plate 30 to form the same curved surface as the front plate 30. In this case, the material of the back plate 50 may be, but is not limited to, polyethylene terephthalate (PET) or a PET composite material. The back plate 50 is lightweight and has excellent bending properties.

[0052] The adhesive film layer 70 is used to bond two other components together, thereby providing a tight connection between the two components. For example, the adhesive film layer 70 is used to bond the front plate 30 to the battery string 10 and to bond the battery string 10 to the back plate 50. The material of the film layer 70 can be ethylene-vinyl acetate (EVA), polyolefin elastomer (POE), polyvinyl butyral (PVB), or thermoplastic elastomer (TPO). In this case, the adhesive film layer 70 has a high light transmittance, which reduces the amount of light loss when light passes through the adhesive film layer 70 and reaches the battery string 10, thereby improving the light utilization efficiency of the battery. For example, the light transmittance of the adhesive film layer 70 may be 70% or more, and the light transmittance of the adhesive film layer 70 may be 70%, 75.2%, 79.5%, 82.1%, 86.3%, 88.2%, 93.1%, 94.2%, 98.5%, or 100%.

[0053] As shown in FIGS. 1-4 , in some embodiments, the battery string 10 conformally bends with the front plate 30, and the arch height of the front plate 30 is less than or equal to the maximum deformation that the battery segments 11 can withstand when bending conformally. In this case, the front plate 30 is a curved, rigid front plate 30. When assembling the curved photovoltaic component 100, the light-receiving surface 15 of the battery string 10 is attached to the front plate 30, allowing the battery string 10 to conformally bend with the front plate 30, thereby forming the same curve as the front plate 30. When the battery string 10 conformally bends with the front plate 30, the arch height H of the front plate 30 is the same as the deformation of the battery segments 11. When the arch height H of the front plate 30 is less than or equal to the maximum deformation that the battery segments 11 can withstand when bending conformally, there is no risk of breakage of the battery segments 11 when bending conformally with the front plate 30. For example, if the maximum deformation amount that the battery pieces 11 can withstand when bending according to the shape is D1, and the arch height H of the front plate 30 is smaller than D1, then the deformation amount of the battery pieces 11 when bending according to the shape together with the front plate 30 is D. Since the deformation amount D of the battery pieces 11 is equal to the arch height H of the front plate 30, the deformation amount D of the battery pieces 11 is smaller than the maximum deformation amount D1 that the battery pieces 11 can withstand when bending according to the shape. There is no problem of breakage when the battery pieces 11 bend according to the shape.

[0054] As shown in FIGS. 1-4 , in some embodiments, the battery string 10 conformally bends with the backplate 50, and the arch height of the backplate 50 is less than or equal to the maximum deformation that the battery segments 11 can withstand when bending conformally. In this case, the backplate 50 is a curved, rigid backplate 50. When assembling the curved photovoltaic component 100, the backside 17 of the battery string 10 adheres to the backplate 50, allowing the battery string 10 to conformally bend with the backplate 50, thereby forming the same curve as the backplate 50. When the battery string 10 conformally bends with the backplate 50, the arch height H of the backplate 50 is the same as the deformation of the battery segments 11. When the arch height H of the backplate 50 is less than or equal to the maximum deformation that the battery segments 11 can withstand when bending conformally, there is no risk of breakage of the battery segments 11 when bending conformally with the backplate 50. For example, if the maximum deformation amount that the battery pieces 11 can withstand when bending according to the shape is D1, and the arch height H of the back plate 50 is smaller than D1, then the deformation amount of the battery pieces 11 when bending according to the shape together with the back plate 50 is D. Since the deformation amount D of the battery pieces 11 is equal to the arch height H of the back plate 50, the deformation amount D of the battery pieces 11 is smaller than the maximum deformation amount D1 that the battery pieces 11 can withstand when bending according to the shape. There is no problem of breakage when the battery pieces 11 bend according to the shape.

[0055] 1-4 , in some embodiments, the battery string 10 conforms with the front panel 30, with the front panel 30 having an arch height that is less than or equal to the maximum deformation that the battery strips 11 can withstand when bending conformally, and the battery string 10 conforms with the back panel 50, with the back panel 50 having an arch height that is less than or equal to the maximum deformation that the battery strips 11 can withstand when bending conformally. In this case, the front panel 30 and the back panel 50 are respectively a curved, rigid front panel 30 and a curved, rigid back panel 50. When assembling the curved photovoltaic component 100, the light-receiving surface 15 of the battery string 10 is bonded to the front panel 30, and the light-receiving surface 17 of the battery string 10 is bonded to the back panel 50, allowing the battery string 10 to conform with the front panel 30 and the back panel 50, thereby forming the same curved surface as the front panel 30 and the back panel 50. When the battery string 10 bends shapewise together with the front plate 30 and the back plate 50, the arch height of the front plate 30, the arch height of the back plate 50, and the deformation of the battery pieces 11 are the same. If the arch heights of the front plate 30 and the back plate 50 are both less than the maximum deformation that the battery pieces 11 can withstand when bending shapewise, there will be no damage to the battery pieces 11 when bending shapewise together with the front plate 30 and the back plate 50. For example, if the maximum deformation that the battery pieces 11 can withstand when bending shapewise is D1, and if the arch height of the front plate 30 is H1 and the arch height of the back plate 50 is H2, then if the arch height H1 of the front plate 30 and the arch height H2 of the back plate 50 are both smaller than D1, the deformation of the battery pieces 11 when bending shapewise together with the front plate 30 and the back plate 50 is D. Since the deformation amount D of the battery piece 11 is equal to the arch height H of the front plate 30 and equal to the arch height H2 of the back plate 50, the deformation amount D of the battery piece 11 is smaller than the maximum deformation amount D1 that the battery piece 11 can withstand when bending according to the shape. There is no problem of breakage when the battery piece 11 bends according to the shape.

[0056] As shown in FIG. 5, a solar cell building surface 1000 according to an embodiment of the present application comprises a plurality of curved photovoltaic elements 100 according to the above embodiments, and the plurality of curved photovoltaic elements 100 are connected to each other.

[0057] In the solar cell architectural surface 1000 according to the embodiment of the present application, the multiple battery pieces 11 in one battery string 10 are arranged along the first direction of the curved solar photovoltaic element, and each battery piece 11 in one battery string 10 covers the wave ridge 101 and is arranged symmetrically along the axis of the first direction with respect to the wave ridge 101, so that the multiple battery pieces 11 receive light with roughly the same intensity during the same period, and a large current is output from the battery string 10. Compared with the current curved solar photovoltaic element 100, the multiple battery pieces 11 in the battery string 10 of the present application receive light with roughly the same intensity, which solves the problem that the current generated by the battery pieces 11 in the battery string 10 that receive light with low intensity is small, which may cause these battery pieces 11 to reduce the output current of the battery string 10.

[0058] The technical features of the above embodiments can be arbitrarily combined, and for the sake of simplicity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combinations of such technical features, they should be considered to be within the scope described in this specification. Furthermore, by utilizing other embodiments derived from the above embodiments, structural and logical substitutions and changes can be made without departing from the scope of the present application.

[0059] The above examples only show some implementation states of the present application, and although the descriptions are relatively specific and detailed, they should not be construed as limitations on the scope of the patent. It should be noted that those skilled in the art can make some modifications and improvements without departing from the concept of the present application, and all of these are included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be governed by the claims.

Claims

1. a curved photovoltaic element comprising at least one cell row, at least one wave crest, and at least one wave trough; The battery string has a plurality of battery pieces connected in series, the plurality of battery pieces are arranged along a first direction of the curved solar power generating member, and in the first direction, each of the battery pieces in one battery string covers the wave crest and is arranged symmetrically along an axis in the first direction with respect to the wave crest. A curved solar photovoltaic component characterized by:

2. 2. The curved solar photovoltaic element of claim 1, wherein the relative ends of the cell segments in the second direction extend toward the lowest point of the wave trough, the second direction is an extension direction of the tangent line of the highest point of the wave crest, and the second direction intersects with the first direction.

3. A gap is formed between two adjacent battery rows in the second direction, and the width of the gap has a value range of [3 mm, 5 mm].

3. The curved photovoltaic member according to claim 2.

4. The difference in the irradiation intensity of light received by any two of the battery pieces in one battery string is within a preset range.

2. The curved photovoltaic member according to claim 1.

5. 2. The curved photovoltaic element according to claim 1, wherein the ratio of the arc length to the chord length is in the range of [1.03, 1.06].

6. In the second direction, the length of the battery strips is positively correlated with the amount of deformation the battery strips can withstand when bending to conform to their shape; and / or the thickness of the battery strip is negatively correlated with the amount of deformation the battery strip can withstand when bent to conform to its shape; 3. The curved photovoltaic member according to claim 2.

7. 2. The curved solar photovoltaic component according to claim 1, further comprising a front plate and a back plate, the front plate, the battery array and the back plate being stacked in this order.

8. the front panel is curved, the battery string bends with the front panel, and the arch height of the front panel is less than the maximum deformation that the battery string can withstand when bending to the shape; and / or The back plate has a curved surface, the battery row bends along with the back plate, and the arch height of the back plate is equal to or less than the maximum deformation that the battery pieces can withstand when bending along the shape.

8. The curved photovoltaic member according to claim 7.

9. The battery pack further includes an adhesive film layer, the adhesive film layer being used to adhere the front plate to the battery array and the battery array to the back plate.

8. The curved photovoltaic member according to claim 7.

10. a curved photovoltaic element, the curved photovoltaic element comprising at least one cell row, at least one wave crest and at least one wave trough; The battery string has a plurality of battery pieces connected in series, the plurality of battery pieces are arranged along a first direction of the curved solar power generating member, and in the first direction, each of the battery pieces in one battery string covers the wave crest and is arranged symmetrically along an axis in the first direction with respect to the wave crest. A solar building surface characterized by:

11. In a second direction, the two ends of the battery segments extend toward the lowest point of the wave trough, the second direction is an extension direction of a tangent line of the highest point of the wave crest, and the second direction intersects with the first direction.

11. The solar building surface of claim 10.

12. A gap is formed between two adjacent battery rows in the second direction, and the width of the gap has a value range of [3 mm, 5 mm].

12. The solar building surface of claim 11.

13. The difference in the irradiation intensity of light received by any two of the battery pieces in one battery string is within a preset range.

11. The solar building surface of claim 10.

14. 11. The solar building surface according to claim 10, characterized in that the ratio of arc length to chord length is in the range of [1.03, 1.06].

15. In the second direction, the length of the battery strips is positively correlated with the amount of deformation the battery strips can withstand when bending to conform to their shape; and / or the thickness of the battery strip is negatively correlated with the amount of deformation the battery strip can withstand when bent to conform to its shape; 12. The solar building surface of claim 11.

16. The battery pack further includes a front plate and a rear plate, and the front plate, the battery row, and the rear plate are stacked in order.

11. The solar building surface of claim 10.

17. the front panel is curved, the battery string bends with the front panel, and the arch height of the front panel is less than the maximum deformation that the battery string can withstand when bending to the shape; and / or The back plate has a curved surface, the battery row bends along with the back plate, and the arch height of the back plate is equal to or less than the maximum deformation that the battery pieces can withstand when bending along the shape.

17. The solar building surface of claim 16.

18. The battery pack further includes an adhesive film layer, the adhesive film layer being used to adhere the front plate to the battery array and the battery array to the back plate.

17. The solar building surface of claim 16.

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