Curved photovoltaic component and photovoltaic building surface

Abstract

A curved photovoltaic component (100), comprising a plurality of battery strings (11) provided with battery cells (111), wave crests (101), and / or wave troughs (103). The plurality of battery strings (11) are connected in series side by side in the tangential direction of the highest point of the wave crests (101), and adjacent battery strings (11) are distributed on two opposite sides of the highest point of the wave crests (101) and / or two opposite sides of the lowest point of the wave troughs (103).

Description

Curved photovoltaic components and photovoltaic building surfaces

[0001] Priority information

[0002] This application claims priority and benefits of the patent application with patent application number 202323614910.2 filed with the State Intellectual Property Office of China on December 27, 2023, and the patent application with patent application number 202323611571.2 filed with the State Intellectual Property Office of China on December 27, 2023, and the entire text of which is incorporated herein by reference. Technical Field

[0003] The present application relates to the field of photovoltaic technology, and more specifically, to a curved photovoltaic component and a photovoltaic building surface. Background Art

[0004] With the increasing popularity of integrated photovoltaic systems (IPV) in buildings, curved photovoltaic panels, designed to better integrate with building surfaces, are emerging as an alternative to traditional tiles. Their unique shape combines aesthetics with power generation. Currently, curved photovoltaic panels typically use crystalline silicon cells, which offer high photoelectric conversion efficiency. However, due to their brittleness, excessively curved cells in curved photovoltaic panels can easily break.

[0005] Summary of the Invention

[0006] The embodiments of the present application provide a curved photovoltaic component and a photovoltaic building surface, which are at least used to solve the problem that the battery cells in the curved photovoltaic component are easily broken when the bending curvature is too large.

[0007] In a first aspect, the present application provides a curved photovoltaic device. The curved photovoltaic device comprises a cell layer, the cell layer comprising multiple cell strings, and the cell strings comprising multiple series-connected cells. The curved photovoltaic device comprises at least one crest and / or at least one trough, wherein the multiple cell strings are arranged side by side along a tangent line to the highest point of the crest, with adjacent cell strings located on opposite sides of the highest point of the crest and / or on opposite sides of the lowest point of the trough.

[0008] In a second aspect, the present application provides a photovoltaic building surface. The photovoltaic building surface includes a curved photovoltaic element. The curved photovoltaic element includes a battery layer, the battery layer includes multiple battery strings, and the battery strings include multiple battery cells connected in series. The curved photovoltaic element includes at least one crest and / or at least one trough, with the multiple battery strings arranged side by side along a tangent line to the highest point of the crest, with adjacent battery strings distributed on opposite sides of the highest point of the crest and / or on opposite sides of the lowest point of the trough.

[0009] In a third aspect, the present application further provides a curved photovoltaic device. The curved photovoltaic device comprises a battery layer, the battery layer comprising multiple series-connected groups, each of which comprises at least one battery string, each of which comprises multiple series-connected battery cells. The curved photovoltaic device comprises at least one wave crest, wherein, in a tangent direction to the highest point of the wave crest, at least one series-connected group is provided on opposite sides of the highest point of the wave crest, and the series-connected groups on opposite sides of the highest point of the wave crest are connected in parallel.

[0010] In a fourth aspect, the present application further provides a photovoltaic building surface. The photovoltaic building surface comprises a curved photovoltaic element. The curved photovoltaic element comprises a battery layer, the battery layer comprising multiple series-connected groups, each of which comprises at least one battery string, each of which comprises multiple series-connected cells. The curved photovoltaic element comprises at least one wave crest, and at least one series-connected group is provided on opposite sides of the crest, tangentially to the crest of the wave crest. The series-connected groups on opposite sides of the crest are connected in parallel.

[0011] In the curved photovoltaic device of the first aspect of the present application and the photovoltaic building surface of the second aspect, adjacent battery strings are distributed on opposite sides of the highest point of the wave crest, and / or the battery strings are distributed on opposite sides of the lowest point of the wave trough, so that when the curved photovoltaic device is assembled, the curvature of the battery cells in the battery string is smaller and the battery cells are not easily broken. In the curved photovoltaic device of the third aspect of the present application and the photovoltaic building surface of the fourth aspect, the series groups located on opposite sides of the highest point of the wave crest are connected in parallel, so that the output current of the curved photovoltaic device is larger. When the series groups located on opposite sides of the highest point of the wave crest receive different light intensities and the currents generated by the series groups on both sides are different, the series group that generates a smaller current will not lower the output current of the battery layer, so that the output current of the curved photovoltaic device is larger.

[0012] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0014] FIG1 is a schematic structural diagram of a curved photovoltaic device according to some embodiments of the present application;

[0015] FIG2 is a schematic structural diagram of a battery layer in the curved photovoltaic device of FIG1 ;

[0016] FIG3 is a schematic structural diagram of a curved photovoltaic device according to some other embodiments of the present application;

[0017] FIG4 is a perspective schematic diagram of a photovoltaic building surface according to certain embodiments of the present application;

[0018] FIG5 is a schematic structural diagram of a battery layer and a backplane according to certain embodiments of the present application;

[0019] FIG6 is a schematic structural diagram of a battery layer and a backplane according to certain embodiments of the present application;

[0020] FIG7 is a schematic side view of the battery string of FIG6 according to some embodiments;

[0021] FIG8 is a schematic top view of a battery cell in the battery string in FIG6 in a slicing manner;

[0022] FIG9 is a schematic top view of the battery cells in the battery string in FIG6 in another slicing method;

[0023] FIG10 is a side view schematic diagram of the battery string in FIG6 according to some other embodiments;

[0024] FIG11 is a schematic top view of the battery cells in the battery string in FIG6 ;

[0025] FIG12 is an exploded schematic diagram of a curved photovoltaic device according to certain embodiments of the present application;

[0026] FIG13 is a schematic structural diagram of a photovoltaic building surface according to certain embodiments of the present application. DETAILED DESCRIPTION

[0027] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0028] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and 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, and therefore should not be understood as a limitation on the present application.

[0029] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0030] In this application, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0031] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0032] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. 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 methods.

[0033] With the increasing popularity of integrated photovoltaic systems (IPV) in buildings, curved photovoltaic panels, designed to better integrate with building surfaces, are emerging as an alternative to traditional tiles. Their unique shape combines aesthetics with power generation. Currently, curved photovoltaic panels typically use crystalline silicon cells, which offer high photoelectric conversion efficiency. However, due to their brittleness, excessively curved cells in curved photovoltaic panels can easily break.

[0034] To address this issue, referring to Figures 1 and 2 , a first aspect of the present application provides a curved photovoltaic device 100, comprising a cell layer 10, which includes a plurality of cell strings 11, each of which includes a plurality of series-connected cells 111. The curved photovoltaic device 100 includes at least one crest 101 and / or at least one trough 103, wherein the plurality of cell strings 11 are arranged side by side along a tangent direction X of the highest point of the crest 101, with adjacent cell strings 11 located on opposite sides of the highest point of the crest 101 and / or on opposite sides of the lowest point of the trough 103.

[0035] Specifically, the curved photovoltaic device 100 is a structure that converts light energy into electricity to power other components and can be used as a building component. For example, the curved photovoltaic device 100 can power household appliances, energy storage power supplies, or streetlights. Curved photovoltaic devices 100 can generate electricity while also maintaining the aesthetics of the building.

[0036] The battery layer 10 is a structure for receiving light energy and converting it into electrical energy. The number of battery strings 11 included in the battery layer 10 may be, but is not limited to, two, three, four or more. A battery string 11 may include two, three, four or more battery cells 111, and the multiple battery cells 111 are connected in series to form a series circuit. The battery cell 111 is a structure for receiving light energy and converting it into electrical energy. The battery cell 111 includes a light-receiving surface 1111 and a backlight surface 1113. The positive and negative electrodes of the battery cell 111 may be respectively arranged on the light-receiving surface 1111 and the backlight surface 1113, or both the positive and negative electrodes of the battery cell 111 may be arranged on the backlight surface 1113. In one embodiment, the positive and negative electrodes of the battery cell 111 are respectively arranged on the light-receiving surface 1111 and the backlight surface 1113. In this case, the cell 111 may be a Passivated Emitter and Rear Cell (PERC) or a Tunnel Oxide Passivating Contacts (TOPCON) cell. In another embodiment, both the positive and negative electrodes of the cell 111 are located on the backlight surface 1113. In this case, the cell 111 may be an Interdigitated Back Contact (IBC) cell, an All Back Contact (ABC) cell, a Hybrid Passivated Back Contact (HPBC) cell, a Metallization Wrap-through (MWT) cell, or a shingled cell.

[0037] In one embodiment, adjacent cell strings 11 are arranged on opposite sides of the highest point of the crest 101. The cells 111 in the cell strings 11 do not need to cross the crest 101, so the deformation of the cells 111 is small. When the curved photovoltaic device 100 is assembled, the deformation of the cells 111 in the cell layer 10 is small when the cell layer 10 is bent, so the cells 111 are less likely to break. In another embodiment, adjacent cell strings 11 are arranged on opposite sides of the lowest point of the trough 103. The cells 111 in the cell strings 11 do not need to cross the trough 103, so the deformation of the cells 111 is small. When the curved photovoltaic device 100 is assembled, the deformation of the cells 111 in the cell layer 10 is small, so the cells 111 are less likely to break. In another embodiment, adjacent cell strings 11 are arranged on opposite sides of the highest point of the crest 101, and adjacent cell strings 11 are arranged on opposite sides of the lowest point of the trough 103.

[0038] The number of crests 101 of the curved photovoltaic element 100 may be, but is not limited to, one, two, three, four or more. The number of troughs 103 of the curved photovoltaic element 100 may be, but is not limited to, one, two, three, four or more. The number of crests 101 and the number of troughs 103 may be the same or different. The deformation of the curved photovoltaic element 100 is greatest at positions near the highest point of the crest 101 and near the lowest point of the trough 103. The cell 111 in the cell string 11 of the present application does not need to span the highest point of the crest 101 and the lowest point of the trough 103. The deformation of the cell 111 is small, and thus the cell 111 is not easily broken.

[0039] In the curved photovoltaic device 100 of the embodiment of the present application, adjacent battery strings 11 are distributed on opposite sides of the highest point of the crest 101, and / or the battery strings 11 are distributed on opposite sides of the lowest point of the trough 103, so that when the curved photovoltaic device 100 is assembled, the curvature of the battery cells 111 in the battery strings 11 is smaller, and the battery cells 111 are not easily broken.

[0040] The curved photovoltaic device 100 will be further described below with reference to FIG. 1 to FIG. 4 .

[0041] Referring to FIG. 1 and FIG. 2 , in some embodiments, a plurality of battery cells 111 in a battery string 11 are arranged in series along a direction perpendicular to a tangent line of the highest point of the wave crest 101 .

[0042] Among them, when the multiple cells 111 in the cell string 11 are arranged along a direction perpendicular to the tangent line of the highest point of the wave crest 101, in the same time period, the multiple cells 111 receive substantially the same light intensity, so that each cell 111 generates substantially the same current. The output current of the cell string 11 is relatively large, and the output power of the curved photovoltaic device 100 is relatively large. This can prevent a cell 111 in the cell string 11 from receiving low light intensity, thereby generating a current far less than that generated by the remaining cells 111, thereby reducing the output current of the cell string 11.

[0043] Referring to FIG. 2 , in some embodiments, battery strings 11 located on opposite sides of the highest point of a wave crest 101 are connected in parallel to form a battery pack 13 , and multiple battery packs 13 are connected in series.

[0044] Among them, since the battery group 13 is formed by the battery strings 11 on opposite sides of the highest point of a peak 101 in parallel, the output current of the battery group 13 is relatively large. One battery group 13 of the present application corresponds to one peak 101. When the curved photovoltaic device 100 includes multiple peaks 101, the battery layer 10 includes multiple battery groups 13, and the multiple battery groups 13 are connected in series, so that the output voltage of the battery layer 10 is relatively high, and the output power of the curved photovoltaic device 100 is relatively large. Each battery group 13 includes battery strings 11 on opposite sides of the highest point of the peak 101, so that in different time periods, when the angle of the sunlight changes, the light intensity received by each battery group 13 is basically the same, so that when multiple battery groups 13 are connected in series, the current output by the battery layer 10 is relatively large.

[0045] 2 , in some embodiments, the positive and negative electrodes are led out from opposite ends of the battery string 11 along a tangent perpendicular to the highest point of the crest 101 , respectively. The positive and negative electrodes of the battery string 11 in each battery pack 13 are located at the same end and are connected to each other to serve as the positive or negative electrode of the battery pack 13 . The polarities of the same ends of adjacent battery packs 13 are opposite.

[0046] Among them, the multiple battery cells 111 in the battery string 11 are connected in series through an interconnecting ribbon, so that the battery string 11 leads to the positive and negative electrodes at opposite ends. Since the battery strings 11 in a battery group 13 are connected in parallel, the positive electrodes of two adjacent battery groups 13 in a battery group 13 are located at the same end, and the negative electrodes of two adjacent battery groups 13 in a battery group 13 are located at the same end. The positive electrodes of two adjacent battery groups 13 in the battery group 13 are electrically connected to each other through a bus ribbon 15. The routing of the bus ribbon 15 connecting the positive electrodes of the two battery strings 11 is relatively simple, and the processing of the battery layer 10 is relatively simple. The negative electrodes of two adjacent battery groups 13 in the battery group 13 are electrically connected to each other through a bus ribbon 15. The routing of the bus ribbon 15 connecting the negative electrodes of the two battery strings 11 is relatively simple, and the processing of the battery layer 10 is relatively simple.

[0047] Because adjacent battery packs 13 are connected in series, the positive electrode of one battery pack 13 and the negative electrode of the adjacent battery pack 13 are located at the same end, making the routing of the busbar 15 electrically connecting the positive electrode of one battery pack 13 and the negative electrode of the adjacent battery pack 13 relatively simple. Because the negative electrode of one battery pack 13 and the positive electrode of the adjacent battery pack 13 are located at the same end, the routing of the busbar 15 electrically connecting the negative electrode of one battery pack 13 and the positive electrode of the adjacent battery pack 13 is relatively simple, and the processing of the battery layer 10 is relatively simple.

[0048] Referring to Figures 1 and 2, in some embodiments, the battery cell 111 is a multi-slice battery cell 111 corresponding to the entire battery cell. Specifically, the battery cell 111 can be a 1 / 2 slice battery (cutting the entire battery cell into two equal parts), a 1 / 4 slice battery (cutting the entire battery cell into four equal parts), or a 1 / 6 slice battery (cutting the entire battery cell into six equal parts 111), etc. corresponding to the entire battery cell. The area of ​​the 1 / 6 slice battery is smaller than the area of ​​the 1 / 4 slice battery, and the area of ​​the 1 / 4 slice battery is smaller than the area of ​​the 1 / 2 slice battery. The smaller the area of ​​the battery cell 111, the smaller the deformation of the battery cell 111 when the curved photovoltaic device 100 is assembled, and the battery cell 111 can avoid the problem of breakage during bending deformation.

[0049] Referring to FIG. 1 to FIG. 3 , in certain embodiments, the curvature radius of the curved photovoltaic device 100 is in the range of [50 mm, 150 mm].

[0050] The curvature radius of the curved photovoltaic device 100 refers to the radius of each crest 101 or the radius of each trough 103. In this application, the radius of the crest 101 and the radius of the trough 103 are equal. After the curved photovoltaic device 100 is assembled, the curvature radius of the cell layer 10 is the same as the curvature radius of the curved photovoltaic device 100. The curvature radius of the curved photovoltaic device 100 can be 50 mm, 61.3 mm, 75.4 mm, 82.4 mm, 96.7 mm, 100.7 mm, 110.1 mm, 120.5 mm, 130.4 mm, 140.8 mm, or 150 mm, etc.

[0051] Specifically, when the curvature radius of the curved photovoltaic device 100 is less than 50 mm, the cells 111 in the battery layer 10 are at risk of breaking. When the curvature radius of the curved photovoltaic device 100 is greater than 200 mm, the curvature of the curved photovoltaic device 100 is not obvious enough, and the aesthetics are not good enough. When the curvature radius of the curved photovoltaic device 100 is in the range of [25 mm, 200 mm], the curvature of the curved photovoltaic device 100 is more obvious, the aesthetics are better, and the cells 111 in the battery layer 10 are not easily broken.

[0052] Please refer to Figures 1 and 3. Furthermore, in some embodiments, the curved photovoltaic component 100 also includes a front panel 30, a back panel 50, a first film layer 70 and a second film layer 90. The front panel 30, the first film layer 70, the battery layer 10, the second film layer 90 and the back panel 50 are stacked in sequence. The first film layer 70 is used to bond the front panel 30 and the battery layer 10, and the second film layer 90 is used to bond the battery layer 10 and the back panel 50.

[0053] Referring to Figures 1 and 3 , specifically, the front panel 30 is disposed on the light-receiving surface 1111 of the cell 111. The front panel 30 is a structure used to protect the cell layer 10. Preferably, the front panel 30 has a high light transmittance, for example, a light transmittance of 70% or greater, so that most or even all light can pass through the front panel 30 and reach the cell layer 10, thereby enabling the cell layer 10 to convert the received light energy into electrical energy. For example, the light transmittance of the front panel 30 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%. The front panel 30 of the present application is a light-transmitting curved front panel 30. The material of the front panel 30 can be, but is not limited to, tempered glass, semi-tempered glass or resin material, wherein the resin material can be polycarbonate or polymethyl methacrylate, etc. The thickness of the front panel 30 of the present application ranges from [3mm, 8mm]. When the thickness of the front panel 30 is less than 3mm, the strength of the front panel 30 is too low, and the front panel 30 is at risk of breaking in bad weather (such as heavy rain, snow or hail). When the thickness of the front panel 30 is greater than 8mm, the thickness of the front panel 30 is too thick, and the front panel 30 is prone to the risk of breaking when bent. In this case, the weight of the front panel 30 is heavier, and thus the weight of the curved photovoltaic component 100 is heavier, and the curved photovoltaic component 100 is not easy to transport and pick up. When the thickness of the front panel 30 is in the range of [3mm, 8mm], the strength of the front panel 30 is relatively high, and there is no risk of the front panel 30 breaking in bad weather. The front panel 30 is not easy to break when bent, and the weight of the front panel 30 is also relatively light, so the curved photovoltaic component 100 is easy to transport and handle.

[0054] Referring to Figures 1 and 3 , the backsheet 50 is positioned on the backlight surface 1113 of the battery cell 111. The backsheet 50 is a structure used to support and protect the battery layer 10. Preferably, the backsheet 50 has certain waterproof, insulating, and weather-resistant properties, thereby providing better protection for the battery layer 10. In one embodiment, the backsheet 50 may be a curved backsheet 50 (as shown in Figure 1 ). In this case, the backsheet 50 may be made of tempered glass or semi-tempered glass. The backsheet 50 has high strength and provides excellent support and protection for the battery layer 10. In another embodiment, the backsheet 50 may be a flexible backsheet 50 (as shown in Figure 3 ), which can bend to conform to the curved front panel 30 to form the same curve as the front panel 30. In this case, the material of the backsheet 50 may be, but is not limited to, polyethylene terephthalate, copper-coated ceramic, or glass fiber composite materials. The backsheet 50 is lightweight and has good bending properties. When the backsheet 50 is a flexible backsheet 50, the thickness of the backsheet 50 is in the range of [0.3mm, 0.7mm]. When the thickness of the backsheet 50 is less than 0.3mm, the weather resistance of the backsheet 50 is poor, which will shorten the service life of the backsheet 50. In addition, the water barrier function of the backsheet 50 is poor. In a high-humidity environment, there is a risk that water vapor in the air will enter the curved photovoltaic device 100 through the backsheet 50. When the thickness of the backsheet 50 is greater than 0.7mm, the backsheet 50 is too thick and difficult to bend with the front sheet 30. When the thickness of the backsheet 50 is in the range of [0.3mm, 0.7mm], the weather resistance and water barrier properties of the backsheet 50 are good, and it can be bent with the front sheet 30 well.

[0055] Referring to Figures 1 and 3 , the first adhesive film layer 70 is a high-cutoff adhesive film. While transmitting light, it also blocks ultraviolet rays from entering the battery layer 10 and backsheet 50. Ultraviolet rays entering the battery layer 10 and backsheet 50 accelerate the aging of the battery cells 111 and backsheet 50, shortening their service life. The first adhesive film layer 70 of the present application blocks ultraviolet rays, thereby effectively protecting the battery layer 10 and backsheet 50. Preferably, the transmittance of the first adhesive film layer 70 is greater than or equal to 70%. As light passes through the first adhesive film layer 70 to reach the battery layer 10, it experiences minimal light loss, resulting in higher light utilization efficiency by the battery cells 111. The material of the first adhesive film layer 70 can be, but is not limited to, ethylene-vinyl acetate copolymer, polyolefin elastomer, polyvinyl butyral, or thermoplastic elastomer. The thickness of the first adhesive film layer 70 of the present application ranges from 0.3 mm to 0.8 mm. When the thickness of the first adhesive film layer 70 is less than 0.3 mm, the bonding strength of the first adhesive film layer 70 is relatively poor. When the front panel 30 is pressed against the battery layer 10 through the first adhesive film layer 70, bubbles are likely to appear between the front panel 30 and the battery layer 10. When the thickness of the first adhesive film layer 70 is greater than 0.8 mm, the time required for pressing the front panel 30 against the battery layer 10 through the first adhesive film layer 70 is relatively long, and the processing efficiency of the curved photovoltaic component 100 is relatively low. In this case, the material used for the first adhesive film layer 70 is relatively large, and the cost of the first adhesive film layer 70 is relatively high. When the thickness of the first adhesive film layer 70 is in the range of [0.3 mm, 0.8 mm], the bonding strength of the first adhesive film layer 70 is relatively high, the bonding between the front panel 30 and the battery layer 10 is relatively strong, and the time required for pressing the front panel 30 against the battery layer 10 through the first adhesive film layer 70 is relatively short, and the processing efficiency of the curved photovoltaic component 100 is relatively high.

[0056] Please refer to Figures 1 and 3. The second film layer 90 is a highly transparent film. For example, the transmittance of the second film layer 90 can be greater than or equal to 70%. When the second film layer 90 is a transparent film, the battery cell 111 can be a double-sided power generation battery cell 111. In this case, both opposite sides of the battery cell 111 can absorb light and convert light energy into electrical energy. The material of the second film layer 90 can be, but is not limited to, ethylene-vinyl acetate copolymer, polyolefin elastomer, or polyvinyl butyral. The thickness of the second film layer 90 of the present application ranges from [0.3 mm to 0.8 mm]. When the thickness of the second film layer 90 is less than 0.3 mm, the bonding strength of the second film layer 90 is poor. In addition, when the backplane 50 is pressed against the battery layer 10 via the second film layer 90, bubbles are likely to appear between the backplane 50 and the battery layer 10. When the thickness of the second adhesive film layer 90 is greater than 0.8 mm, the time required to press the backsheet 50 and the battery layer 10 together through the second adhesive film layer 90 is long, resulting in a low processing efficiency for the curved photovoltaic component 100. Furthermore, the second adhesive film layer 90 requires more material, resulting in a high cost. When the thickness of the second adhesive film layer 90 is within the range of [0.3 mm, 0.8 mm], the bonding strength of the second adhesive film layer 90 is high, and the bond between the backsheet 50 and the battery layer 10 is relatively strong. Furthermore, the time required to press the backsheet 50 and the battery layer 10 together through the second adhesive film layer 90 is short, resulting in a high processing efficiency for the curved photovoltaic component 100.

[0057] Referring to Figure 1 , in one embodiment, the front panel 30 is a curved front panel 30, and the cell layer 10 is curved along with the front panel 30. When the curved photovoltaic device 100 is assembled, the cell layer 10 can bend along with the front panel 30 to form the same curve as the front panel 30. Referring to Figure 3 , in another embodiment, the front panel 30 is a curved front panel 30, and the back panel 50 is also a curved back panel 50, and the cell layer 10 is curved along with both the front panel 30 and the back panel 50. When the curved photovoltaic device 100 is assembled, the cell layer 10 can be curved along with both the front panel 30 and the back panel 50 to form the same curve as the front panel 30.

[0058] Please refer to Figure 4. The second aspect of this application provides a photovoltaic building surface 1000, which includes a plurality of curved photovoltaic elements 100 according to any of the above embodiments (including but not limited to those shown in Figures 1 to 3), and the plurality of curved photovoltaic elements 100 are interconnected.

[0059] In the photovoltaic building surface 1000 of the embodiment of the present application, adjacent battery strings 11 are distributed on opposite sides of the highest point of the crest 101, and / or the battery strings 11 are distributed on opposite sides of the lowest point of the trough 103, so that when the curved photovoltaic component 100 is assembled, the curvature of the battery cells 111 in the battery strings 11 is smaller, and the battery cells 111 are not easily broken.

[0060] In addition, with the increasing popularity of building photovoltaic integration, photovoltaic components (photovoltaic tiles) that can replace traditional tiles have emerged in order to better integrate with building surfaces. Photovoltaic components can be flat photovoltaic components or curved photovoltaic components. Compared with flat photovoltaic components, curved photovoltaic components have both aesthetics and power generation functions due to their unique shape. However, because the multiple battery strings in the battery layer are distributed at different positions on the curved photovoltaic component, the multiple battery strings receive different light intensities during the same time period, resulting in different currents generated in the multiple battery strings. Battery strings that receive less light intensity generate less current, which will reduce the output current of the curved photovoltaic component.

[0061] To address this issue, referring to Figures 5 and 6 , the third aspect of the present application further provides a curved photovoltaic device 100, comprising a cell layer 10, the cell layer 10 comprising a plurality of series-connected groups 11, each of the series-connected groups 11 comprising at least one cell string 111, each of the cell strings 111 comprising a plurality of series-connected cells 1111. The curved photovoltaic device 100 comprises at least one wave crest 101, and in a tangent direction X to the highest point of the wave crest 101, at least one series-connected group 11 is provided on opposite sides of the highest point of the wave crest 101, and the series-connected groups 11 on opposite sides of the highest point of the wave crest 101 are connected in parallel.

[0062] Specifically, the curved photovoltaic device 100 is a structure that converts light energy into electricity to power other components and can be used as a building component. For example, the curved photovoltaic device 100 can power household appliances, energy storage power supplies, or streetlights. Curved photovoltaic devices 100 can generate electricity while also maintaining the aesthetics of the building.

[0063] The battery layer 10 is a structure for receiving light energy and converting it into electrical energy. The series group 11 includes one or more battery strings 111. The battery string 111 includes one or more battery cells 1111. Among them, a battery string 111 may include two, three, four or more battery cells 1111, and multiple battery cells 1111 are connected in series to form a series circuit. The battery cell 1111 is a structure for receiving light energy and converting it into electrical energy. Referring to Figures 7 and 10, the battery cell 1111 includes a light-receiving surface 1117 and a backlight surface 1119. The positive and negative electrodes of the battery cell 1111 can be respectively arranged on the light-receiving surface 1117 and the backlight surface 1119, or both the positive and negative electrodes of the battery cell 1111 can be arranged on the backlight surface 1119. In one embodiment, the positive and negative electrodes of the battery cell 1111 are respectively arranged on the light-receiving surface 1117 and the backlight surface 1119. In this case, the cell 1111 may be a Passivated Emitter and Rear Cell (PERC) or a Tunnel Oxide Passivating Contacts (TOPCON) cell. In another embodiment, both the positive and negative electrodes of the cell 1111 are located on the backlight surface 1119. In this case, the cell 1111 may be an Interdigitated Back Contact (IBC) cell, an All Back Contact (ABC) cell, a Hybrid Passivated Back Contact (HPBC) cell, or a Metallization Wrap-through (MWT) cell.

[0064] The number of peaks 101 of the curved photovoltaic element 100 can be, but is not limited to, one, two, three, four or more. In the case where there are multiple peaks 101, troughs 103 are connected between the peaks 101. Since there is a certain height fluctuation between the peaks 101 and the troughs 103, when the sunlight irradiates the curved photovoltaic element 100, the multiple series groups 11 receive different light intensities. Generally, in the same time period, the light intensities received on opposite sides of the highest point of the peak 101 are different, so that the currents generated in the series groups 11 on opposite sides of the highest point of the peak 101 are different. The current generated in the series group 11 with a large light intensity is large, and the current generated in the series group 11 with a small light intensity is small. If the series groups 11 on opposite sides of the highest point of the peak 101 are connected in series, the currents at various locations in the series circuit are equal, so the series group 11 with a small current will lower the output current of the battery layer 10, so that the output current of the curved photovoltaic element 100 is small. The series groups 11 on opposite sides of the highest point of the peak 101 of the present application are connected in parallel, and the current of the parallel circuit is the sum of the currents generated by the series groups 11 on opposite sides of the highest point of the peak 101, so that the output current of the battery layer 10 is larger, and the output current of the curved photovoltaic device 100 is larger.

[0065] In the curved photovoltaic device 100 of the present embodiment, the series groups 11 on opposite sides of the highest point of the wave crest 101 are connected in parallel, resulting in a higher output current for the curved photovoltaic device 100. If the series groups 11 on opposite sides of the highest point of the wave crest 101 receive different light intensities and generate different currents, the series group 11 generating the lower current will not reduce the output current of the cell layer 10, resulting in a higher output current for the curved photovoltaic device 100.

[0066] The curved photovoltaic device 100 will be further described below with reference to FIG. 6 to FIG. 13 .

[0067] Please refer to Figure 6. In some embodiments, the series group 11 includes a battery string 111. In this case, the structure of the series group 11 is relatively simple and the processing is relatively simple. The area of ​​each battery cell 1111 in the battery string 111 is large, and the area of ​​each battery cell 1111 that can receive light is large. Since a series group 11 is arranged on any one of the opposite sides of the highest point of the peak 101, when the series group 11 includes a battery string 111, the multiple battery cells 1111 in a battery string 111 receive substantially the same light intensity, so that the output current of the battery string 111 is relatively large (this can avoid the problem of lowering the output current of the battery string 111 due to the low light intensity received by a certain battery cell 1111).

[0068] Referring to FIG. 6 , in other embodiments, the series group 11 includes a plurality of battery strings 111 , which are connected in series and / or in parallel. In this case, the area of ​​the battery cells 1111 in the battery string 111 is relatively small. When the curved photovoltaic device 100 is assembled, the battery layer 10 needs to bend and deform. When the area of ​​the battery cells 1111 is relatively small, the area of ​​the curved photovoltaic device 100 covered by the battery cells 1111 is relatively small, so that the deformation of the battery cells 1111 during bending is relatively small, and the battery cells 1111 are not easily broken.

[0069] The series group 11 may include two, three, four or more battery strings 111. In one example, multiple battery strings 111 are connected in series, and in this case, the output voltage of the series group 11 is relatively high. In another example, multiple battery strings 111 are connected in parallel, so that the output current of the series group 11 is relatively large. The multiple battery strings 111 in the series group 11 of the present application are connected in series, and the output voltage of the series group 11 is relatively high, so that the output voltage of the battery layer 10 is relatively high. And because a series group 11 is arranged on either side of the opposite sides of the highest point of the peak 101, when the series group 11 includes multiple battery strings 111 connected in series, the light intensity received by the multiple battery strings 111 is basically the same, so that the output current of the series group 11 is also relatively large (the problem of lowering the output current of the series group 11 due to the low light intensity received by a certain battery string 111 can be avoided).

[0070] Referring to Figure 5 , in some embodiments, there is only one series connection group 11 located on either side of the highest point of the peak 101. In this case, in the tangent direction X of the highest point of the peak 101, one series connection group 11 almost completely covers one side of the peak 101, so that the cell layer 10 can cover the entire curved photovoltaic device 100 as much as possible, resulting in a higher power generation efficiency per unit area of ​​the curved photovoltaic device 100.

[0071] In other embodiments, there are multiple series groups 11 located on either side of the highest point of the peak 101, and the multiple series groups 11 are connected in series and / or in parallel. In this case, the number of series groups 11 located on one side of the peak 101 can be, but is not limited to, two, three, four, or more. The number of series groups 11 located on both sides of the peak 101 can be the same or different. In one example, the multiple series groups 11 located on one side of the peak 101 are connected in series, thereby increasing the output voltage of the battery layer 10. In another example, the multiple series groups 11 located on one side of the peak 101 are connected in parallel, thereby increasing the output current of the battery layer 10. When there are multiple series groups 11 located on one side of the peak 101, in the tangent direction X of the highest point of the peak 101, the multiple series groups 11 almost cover the entire side of the peak 101, so that the battery layer 10 can cover the curved photovoltaic device 100 as much as possible, and the power generation efficiency per unit area of ​​the curved photovoltaic device 100 is higher.

[0072] Referring to Figures 5 and 6, in some embodiments, the series group 11 includes one battery string 111, and there is only one series group 11 located on either side of the highest point of the peak 101. In other embodiments, the series group 11 includes one battery string 111, and there are multiple series groups 11 located on either side of the highest point of the peak 101, and the multiple series groups 11 are connected in series and / or in parallel. In still other embodiments, the series group 11 includes multiple battery strings 111, and the multiple battery strings 111 are connected in series and / or in parallel, and there is only one series group 11 located on either side of the highest point of the peak 101. In yet other embodiments, the series group 11 includes multiple battery strings 111, and the multiple battery strings 111 are connected in series and / or in parallel, and there are multiple series groups 11 located on either side of the highest point of the peak 101, and the multiple series groups 11 are connected in series and / or in parallel.

[0073] 5 and 6 , in some embodiments, the series groups 11 located on opposite sides of the highest point of a wave crest 101 are connected in parallel to form a battery group 13 , and the multiple battery groups 13 are connected in series.

[0074] Among them, because the battery group 13 is formed by the parallel connection of series groups 11 on opposite sides of the highest point of a peak 101, the output current of the battery group 13 is relatively large. One battery group 13 corresponds to one peak 101. When the curved photovoltaic device 100 includes multiple peaks 101, the battery layer 10 includes multiple battery groups 13, and the multiple battery groups 13 are connected in series, so that the output voltage of the battery layer 10 is relatively high, and the output power of the curved photovoltaic device 100 is relatively high. Each battery group 13 includes series groups 11 on opposite sides of the highest point of the peak 101. Therefore, when the angle of the sunlight changes during different time periods, the light intensity received by each battery group 13 is basically the same. Therefore, when multiple battery groups 13 are connected in series, the current output by the battery layer 10 is relatively high.

[0075] Referring to Figures 6 to 11 , in certain embodiments, the cell 1111 is a multi-slice cell 1111 corresponding to a whole cell. For example, the cell 1111 may be a 1 / 2-slice cell (cutting the whole cell into two cells 1111), a 1 / 4-slice cell (cutting the whole cell into four cells 1111), or a 1 / 6-slice cell (cutting the whole cell into six cells 1111), corresponding to the whole cell. The area of ​​a 1 / 6-slice cell is smaller than that of a 1 / 4-slice cell, and the area of ​​a 1 / 4-slice cell is smaller than that of a 1 / 2-slice cell. The smaller the area of ​​the cell 1111, the smaller the deformation of the cell 1111 when the curved photovoltaic device 100 is assembled, and the cell 1111 can avoid the problem of breakage during bending deformation.

[0076] Please refer to Figures 7 and 8. In some embodiments, when the positive and negative electrodes of the battery cell 1111 are respectively arranged on the light-receiving surface 1117 and the backlight surface 1119, the battery cell 1111 can be formed by cutting the entire battery cell along the direction parallel to the main grid line 1115. The light-receiving surface 1117 and the backlight surface 1119 each include at least one main grid line 1115. The multiple battery cells 1111 in the battery string 111 are arranged along the extension direction of the main grid line 1115. The main grid line 1115 of the light-receiving surface 1117 of the battery cell 1111 is electrically connected to the main grid line 1115 of the backlight surface 1119 of the adjacent battery cell 1111. The polarity of the main grid line 1115 of the light-receiving surface 1117 of the battery cell 1111 is opposite to the polarity of the main grid line 1115 of the backlight surface 1119 of the adjacent battery cell 1111.

[0077] Specifically, the main grid line 1115 is a metal wire provided on the surface of the battery cell 1111. Preferably, there are multiple main grid lines 1115 on the battery cell 1111. When the positive electrode and the negative electrode of the battery cell 1111 are respectively provided on the light-receiving surface 1117 and the backlight surface 1119, multiple main grid lines 1115 are also respectively provided on the light-receiving surface 1117 and the backlight surface 1119. The main grid line 1115 is used to lead out the positive and negative electrodes of the battery cell 1111. The main grid line 1115 is welded with the welding strip 1113 to connect two adjacent battery cells 1111 in series. In addition, the main grid line 1115 can also collect and transmit the current generated by the battery cell 1111. The main grid line 1115 cooperates with the welding strip 1113 to ultimately output the current generated on the battery string 111 to other circuits.

[0078] The soldering ribbon 1113 connects the busbar 1115 of the light-receiving surface 1117 of one cell 1111 with the busbar 1115 of the backlight surface 1119 of another adjacent cell 1111, thereby connecting multiple cells 1111 in series to form a cell string 111. For example, the busbar 1115 of the light-receiving surface 1117 leads to the negative electrode of the cell 1111, and the busbar 1115 of the backlight surface 1119 leads to the positive electrode of the cell 1111. The soldering ribbon 1113 electrically connects the positive and negative electrodes of adjacent cells 1111, thereby connecting two cells 1111 in series.

[0079] Referring to Figures 7 and 9, in other embodiments, when the positive and negative electrodes of the cell 1111 are respectively arranged on the light-receiving surface 1117 and the backlight surface 1119, the cell 1111 can be formed by cutting the entire cell along a direction perpendicular to the busbars 1115. In this case, the number of busbars 1115 on the light-receiving surface 1117 of the cell 1111 is the same as the number of busbars 1115 on the light-receiving surface 1117 of the entire cell, and the number of busbars 1115 on the backlight surface 1119 of the cell 1111 is also the same as the number of busbars 1115 on the backlight surface 1119 of the entire cell. The busbars 1115 on the light-receiving surface 1117 of the cell 1111 can be, but are not limited to, one, two, three, four, or more. The busbars 1115 on the backlight surface 1119 of the cell 1111 can be, but are not limited to, one, two, three, four, or more. When there are multiple busbars 1115 , the busbars 1115 have a better effect of collecting the current of the solar cell 1111 .

[0080] At this time, the multiple battery cells 1111 in the battery string 111 are arranged along the extension direction of the vertical main grid line 1115, and the main grid line 1115 of the light-receiving surface 1117 of the battery cell 1111 is electrically connected to the main grid line 1115 of the backlight surface 1119 of the adjacent battery cell 1111; the polarity of the main grid line 1115 of the light-receiving surface 1117 of the battery cell 1111 is opposite to the polarity of the main grid line 1115 of the backlight surface 1119 of the adjacent battery cell 1111.

[0081] After the first welding strip 1113 is welded to each busbar 1115 in the direction in which the busbar 1115 extends, the second welding strip 1113 is then connected to the first welding strip 1113 in the direction perpendicular to the direction in which the busbar 1115 extends, so that two adjacent battery cells 1111 are connected in series. The second welding strip 1113 connects the first welding strip 1113 of the light-receiving surface 1117 of one battery cell 1111 with the first welding strip 1113 of the backlight surface 1119 of another adjacent battery cell 1111, thereby connecting multiple battery cells 1111 in series to form a battery string 111. For example, the busbar 1115 on the light-receiving surface 1117 leads to the negative electrode of the battery cell 1111, and the busbar 1115 on the backlight surface 1119 leads to the positive electrode of the battery cell 1111. The first welding ribbon 1113 is electrically connected to the main grid line 1115 , and the second welding ribbon 1113 is electrically connected to the first welding ribbon 1113 , so that the second welding ribbon 1113 can electrically connect the positive and negative electrodes of adjacent battery cells 1111 to connect the two battery cells 1111 in series.

[0082] Referring to Figures 10 and 11, in some other embodiments, when the positive and negative electrodes of the cell 1111 are both located on the backlight surface 1119, the cell 1111 can be formed by cutting the entire cell along a direction perpendicular to the main grid lines 1115. In this case, the number of main grid lines 1115 on the backlight surface 1119 of the cell 1111 is the same as the number of main grid lines 1115 on the backlight surface 1119 of the entire cell. The main grid lines 1115 on the backlight surface 1119 of the cell 1111 can be, but are not limited to, two, three, four, or more. When there are multiple main grid lines 1115, the main grid lines 1115 are more effective in collecting the current of the cell 1111.

[0083] At this time, the multiple battery cells 1111 in the battery string 111 are arranged along the extension direction of the vertical main bus line 1115, and the main bus line 1115 of the backlight surface 1119 of the battery cell 1111 is electrically connected to the main bus line 1115 of the backlight surface 1119 of the adjacent battery cell 1111; the polarity of the main bus line 1115 on one side of the backlight surface 1119 of the battery cell 1111 is opposite to the polarity of the main bus line 1115 on the same side of the backlight surface 1119 of the adjacent battery cell 1111.

[0084] Among them, after the first welding strip 1113 is welded to each main grid line 1115 in the extension direction of the main grid line 1115, the second welding strip 1113 is connected to the first welding strip 1113 in the extension direction perpendicular to the main grid line 1115, so that the two adjacent battery cells 1111 are connected in series. A portion of the main grid lines 1115 on the backlight surface 1119 is used to lead out the positive electrode of the battery cell 1111, and the positive electrode of the battery cell 1111 is led out from one side of the battery cell 1111. Another portion of the main grid lines 1115 on the backlight surface 1119 is used to lead out the negative electrode of the battery cell 1111, and the negative electrode of the battery cell 1111 is led out from the other side of the battery cell 1111. For example, as shown in FIG11 , in the width direction of the cell 1111, the busbar 1115 of one cell 1111 leads the positive electrode out of one side of the cell 1111, and the busbar 1115 of another adjacent cell 1111 leads the negative electrode out of the same side of the cell 1111. After the first welding ribbon 1113 is electrically connected to the busbar 1115, the second welding ribbon 1113 is electrically connected to the first welding ribbon 1113, so that the second welding ribbon 1113 can electrically connect the positive and negative electrodes of the adjacent cell 1111 from one side of the cell 1111, thereby connecting the two cell 1111 in series.

[0085] Please refer to Figure 6. In some embodiments, the extension direction of the battery string 111 is perpendicular to the tangent direction X of the highest point of the peak 101. When the series group 11 includes multiple battery strings 111, the multiple battery strings 111 are arranged along the tangent direction X of the highest point of the peak 101.

[0086] Specifically, when the extension direction of the battery string 111 is perpendicular to the tangent direction X of the highest point of the peak 101, the multiple cells 1111 in the battery string 111 are arranged along the tangent direction X perpendicular to the highest point of the peak 101. In different time periods, when the angle of sunlight changes, the light intensity received by the multiple cells 1111 in the battery string 111 is substantially the same, thereby resulting in a relatively large output current of the battery string 111. Furthermore, when the multiple battery strings 111 in the series group 11 are arranged along the tangent direction X of the highest point of the peak 101, when the curved photovoltaic device 100 is assembled, when the battery layer 10 bends and deforms, the deformation of the cells 1111 in each battery string 111 is relatively small, thereby making the cells 1111 less likely to break when bent.

[0087] Please refer to Figure 12. In some embodiments, the curved photovoltaic component 100 also includes a front panel 30, a film layer 50 and a back panel 70. The front panel 30, the film layer 50, the battery layer 10, the film layer 50 and the back panel 70 are stacked in sequence. The film layer 50 is used to bond the front panel 30 and the battery layer 10, and to bond the battery layer 10 and the back panel 70.

[0088] Specifically, the front panel 30 is disposed on the light-receiving surface 1117 of the cell 1111. The front panel 30 is a structure used to protect the cell layer 10. Preferably, the front panel 30 has a high light transmittance, for example, a transmittance of 70% or greater, so that most or even all light can pass through the front panel 30 and reach the cell layer 10, thereby enabling the cell layer 10 to convert the received light energy into electrical energy. For example, the light transmittance of the front panel 30 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%. The front panel 30 can be a curved hard front panel 30 or a flexible front panel 30. The material of the front panel 30 can be, but is not limited to, transparent glass and polycarbonate plastic.

[0089] The backplane 70 is provided on the backlight surface 1119 of the battery cell 1111. The backplane 70 is a structure for supporting and protecting the battery layer 10. Preferably, the backplane 70 may have certain waterproof, insulating and weather-resistant properties, so that the backplane 70 can better protect the battery layer 10. In one embodiment, the backplane 70 may be a hard backplane 70 with a curved surface. In this case, the backplane 70 may be tempered glass or semi-tempered glass. The backplane 70 has high strength and can better support and protect the battery layer 10. In another embodiment, the backplane 70 may be a flexible backplane 70, which can bend along with the curved front panel 30 to form the same curve as the front panel 30. In this case, the material of the backplane 70 may be, but is not limited to, polyethylene terephthalate (PET) or a composite material of PET. The backplane 70 is light in weight and has good bending properties.

[0090] The adhesive film layer 50 is used to bond two other components together, ensuring a tight connection. For example, the adhesive film layer 50 can be used to bond the front panel 30 to the battery layer 10, or the battery layer 10 to the back panel 70. The adhesive film layer 50 can be made of materials such as ethylene vinyl acetate (EVA), polyolefin (POE), polyvinyl butyral (PVB), or thermoplastic elastomer (TPO). The adhesive film layer 50 has a high light transmittance, minimizing light loss as it passes through the adhesive film layer 50 to reach the battery layer 10. This results in a higher light utilization rate for the battery. For example, the light transmittance of the film layer 50 may be greater than or equal to 70%, and the light transmittance of the film layer 50 may be 70%, 75.2%, 79.5%, 82.1%, 86.3%, 88.2%, 93.1%, 94.2%, 98.5%, or 100%.

[0091] Please refer to Figure 12. In some embodiments, the front panel 30 is a curved front panel 30, and the battery layer 10 is bent along with the front panel 30. When the curved photovoltaic component 100 is assembled, the battery layer 10 can be bent along with the front panel 30 to form the same curved surface as the front panel 30. Since the extension direction of the battery string 111 in the battery layer 10 is perpendicular to the tangent direction X of the highest point of the crest 101, and the multiple battery strings 111 are arranged along the tangent direction X of the highest point of the crest 101, the battery layer 10 is not easily broken when bent. At this time, the curvature of the front panel 30 can be larger, the battery layer 10 can be bent along with the front panel 30 and is not easily broken, and the curved photovoltaic component 100 has better aesthetics.

[0092] Please refer to Figure 12. In other embodiments, the backsheet 70 is a curved backsheet 70, and the battery layer 10 is bent along with the backsheet 70. When the curved photovoltaic component 100 is assembled, the battery layer 10 can be bent along with the backsheet 70 to form the same curve as the backsheet 70. Since the extension direction of the battery string 111 in the battery layer 10 is perpendicular to the tangent direction X of the highest point of the crest 101, and the multiple battery strings 111 are arranged along the tangent direction X of the highest point of the crest 101, the battery layer 10 is not easily broken when bent. At this time, the curvature of the backsheet 70 can be larger, the battery layer 10 can be bent along with the backsheet 70 and is not easily broken, and the curved photovoltaic component 100 has better aesthetics.

[0093] Referring to Figure 12 , in some other embodiments, the front panel 30 is a curved front panel 30, and the battery layer 10 bends along with the front panel 30. Furthermore, the back panel 70 is also a curved back panel 70, and the battery layer 10 bends along with the back panel 70. In this case, the front panel 30 and the back panel 70 have the same curved surface, and the battery layer 10 can bend along with both the front panel 30 and the back panel 70 to form a curved surface identical to both the front panel 30 and the back panel 70. Because the battery strings 111 in the battery layer 10 extend perpendicular to the tangent direction X of the highest point of the wave crest 101, and the multiple battery strings 111 are arranged along the tangent direction X of the highest point of the wave crest 101, the battery layer 10 is less likely to break when bent. In this case, the curvature of the front panel 30 and the back panel 70 can be larger, allowing the battery layer 10 to bend along with both the front panel 30 and the back panel 70 without breaking, resulting in a more aesthetically pleasing curved photovoltaic device 100.

[0094] Please refer to Figure 13. The fourth aspect of this application also provides another photovoltaic building surface 1000, which includes a plurality of curved photovoltaic elements 100 of any of the above-mentioned embodiments (including but not limited to those shown in Figures 5 to 12), and the plurality of curved photovoltaic elements 100 are interconnected.

[0095] In the photovoltaic building surface 1000 of the present embodiment, the series groups 11 on opposite sides of the highest point of the wave crest 101 are connected in parallel, resulting in a higher output current for the curved photovoltaic device 100. If the series groups 11 on opposite sides of the highest point of the wave crest 101 receive different light intensities and generate different currents, the series group 11 generating the lower current will not reduce the output current of the cell layer 10, resulting in a higher output current for the curved photovoltaic device 100.

[0096] The technical features of the above-described embodiments may be combined in any manner. To simplify the description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there are no conflicts in the combination of these technical features, they should be considered to be within the scope of this specification. Furthermore, other implementations can be derived from the above-described embodiments, allowing for structural and logical substitutions and changes without departing from the scope of this disclosure.

[0097] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A curved photovoltaic component, wherein, Comprising: a battery layer, the battery layer comprising a plurality of battery strings, and the battery strings comprising a plurality of serially connected solar cells; the curved photovoltaic device comprising at least one wave crest and / or at least one wave trough, a plurality of the battery strings being arranged side by side along a tangent direction of a highest point of the wave crest, adjacent ones of the battery strings being distributed on opposite sides of the highest point of the wave crest, and / or the battery strings being distributed on opposite sides of a lowest point of the wave trough; 2. The curved photovoltaic device according to claim 1, wherein, a plurality of the solar cells in the battery string being serially arranged along a direction perpendicular to the tangent of the highest point of the wave crest; 3. The curved photovoltaic device according to claim 1, wherein, the battery strings located on opposite sides of the highest point of one wave crest being connected in parallel to form a battery pack, and a plurality of the battery packs being connected in series; 4. The curved photovoltaic device according to claim 3, wherein, in a direction perpendicular to the tangent of the highest point of the wave crest, opposite ends of the battery string respectively lead out a positive electrode and a negative electrode, the positive electrode and the negative electrode of the battery strings in each battery pack being located at the same end and being connected to each other to serve as the positive electrode or the negative electrode of the battery pack, and polarities of the same ends of adjacent battery packs being opposite; 5. The curved photovoltaic device according to claim 1, wherein, the solar cell being a multi-slice solar cell corresponding to a whole solar cell; 6. The curved photovoltaic device according to claim 1, wherein, a value range of a curved surface radius of the curved photovoltaic device being [50 mm, 150 mm]; 7. The curved photovoltaic device according to claim 1, wherein, the curved photovoltaic device further comprising a front plate, a back plate, a first encapsulant layer and a second encapsulant layer, the front plate, the first encapsulant layer, the battery layer, the second encapsulant layer and the back plate being sequentially stacked, the first encapsulant layer being used for bonding the front plate and the battery layer, and the second encapsulant layer being used for bonding the battery layer and the back plate; the front plate being a curved front plate, and the battery layer being bent conformably with the front plate; or the front plate being a curved front plate, the back plate being a curved back plate, and the battery layer being bent conformably with the front plate and the back plate; 8. The curved photovoltaic device according to claim 7, wherein the front plate is a light-transmitting curved front plate, and a material of the front plate is tempered glass, semi-tempered glass or a resin material; the first encapsulant layer is a high-cutoff encapsulant, and a material of the first encapsulant layer is ethylene-vinyl acetate copolymer, polyolefin elastomer, polyvinyl butyral or thermoplastic elastomer; the second encapsulant layer is a high-light-transmitting encapsulant, and a material of the second encapsulant layer is ethylene-vinyl acetate copolymer, polyolefin elastomer or polyvinyl butyral; the back plate is a curved back plate or a flexible back plate, and in a case where the back plate is a curved back plate, the back plate is tempered glass or toughened glass, and in a case where the back plate is a flexible back plate, a material of the back plate is polyethylene terephthalate, copper-coated ceramic or glass fiber composite material; 9. The curved photovoltaic device according to claim 7, wherein a value range of a thickness of the front plate is [3 mm, 8 mm]; a value range of a thickness of the first encapsulant layer is [0.3 mm, 0.8 mm]; a value range of a thickness of the second encapsulant layer is [0.3 mm, 0.8 mm]; in a case where the back plate is a flexible back plate, a value range of a thickness of the back plate is [0.3 mm, 0.7 mm].

10. A curved photovoltaic component, wherein, Comprising: A battery layer, the battery layer comprising a plurality of series groups, each series group comprising at least one battery string, the battery string comprising a plurality of serially connected solar cells; the curved photovoltaic device comprises at least one peak, on the tangential direction of the highest point of the peak, at least one of the series groups is respectively provided on the opposite sides of the highest point of the peak, and the series groups located on the opposite sides of the highest point of the peak are connected in parallel.

11. The curved photovoltaic device according to claim 10, wherein, the series group comprises one battery string; or the series group comprises a plurality of battery strings, and the plurality of battery strings are connected in series and / or in parallel; and / or the series group on any one of the opposite sides of the highest point of the peak is one; or the series group on any one of the opposite sides of the highest point of the peak is a plurality, and the plurality of series groups are connected in series and / or in parallel.

12. The curved photovoltaic device according to claim 10, wherein, The series groups located on the opposite sides of the highest point of one peak are connected in parallel to form a battery pack, and the plurality of battery packs are all connected in series.

13. The curved photovoltaic device according to claim 10, wherein, The solar cell is a multi-sectioned solar cell corresponding to a whole solar cell.

14. The curved photovoltaic device according to claim 13, wherein, The solar cell comprises a light-receiving surface and a backlight surface, both the light-receiving surface and the backlight surface each comprise at least one main grid line, the plurality of solar cells in the battery string are arranged along the extending direction of the main grid line, and the main grid line on the light-receiving surface of the solar cell is electrically connected to the main grid line on the backlight surface of the adjacent solar cell; The polarity led out by the main grid line on the light-receiving surface of the solar cell is opposite to the polarity led out by the main grid line on the backlight surface of the adjacent solar cell.

15. The curved photovoltaic device according to claim 13, wherein, The solar cell comprises a light-receiving surface and a backlight surface, both the light-receiving surface and the backlight surface each comprise a plurality of main grid lines, the plurality of solar cells in the battery string are arranged along a direction perpendicular to the extending direction of the main grid line, and the main grid line on the light-receiving surface of the solar cell is electrically connected to the main grid line on the backlight surface of the adjacent solar cell; The polarity led out by the main grid line on the light-receiving surface of the solar cell is opposite to the polarity led out by the main grid line on the backlight surface of the adjacent solar cell.

16. The curved photovoltaic device according to claim 13, wherein, The solar cell comprises a light-receiving surface and a backlight surface, the backlight surface comprises a plurality of main grid lines, the plurality of solar cells in the battery string are arranged along a direction perpendicular to the extending direction of the main grid line, and the main grid line on the backlight surface of the solar cell is electrically connected to the main grid line on the backlight surface of the adjacent solar cell; The polarity led out by the main grid line on one side of the backlight surface of the solar cell is opposite to the polarity led out by the main grid line on the same side of the backlight surface of the adjacent solar cell.

17. The curved photovoltaic device according to claim 10, wherein, The extending direction of the battery string is perpendicular to the tangential direction of the highest point of the peak, and in the case where the series group comprises a plurality of battery strings, the plurality of battery strings are arranged along the tangential direction of the highest point of the peak.

18. The curved photovoltaic device according to claim 10, wherein, The curved photovoltaic device further comprises a front plate, a glue film layer and a back plate, the front plate, the glue film layer, the battery layer, the glue film layer and the back plate are sequentially stacked, and the glue film layer is used for bonding the front plate and the battery layer, and for bonding the battery layer and the back plate; The front plate is a curved front plate, and the battery layer is bent conformally with the front plate; and / or The back plate is a curved back plate, and the battery layer is bent conformally with the back plate.

19. A photovoltaic building surface, characterized in that, It includes the curved photovoltaic device according to any one of claims 1-18.

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