Foldable photovoltaic module

Abstract

The application provides a foldable photovoltaic module, which comprises a power generation body, the power generation body comprising a plurality of power generation units arranged at intervals along a first direction and a folding part between two adjacent power generation units. The power generation unit comprises: at least one cell string, the cell string comprising a plurality of cell pieces; a support plate supporting the cell string and provided with a positioning groove; a plurality of first electric connecting lines for leading out current in the cell string, the first electric connecting lines being arranged in the positioning groove and bent to a side of the support plate away from the cell string; and a busbar arranged on the side of the support plate away from the cell string and connected with the plurality of first electric connecting lines. The application enables the plurality of first electric connecting lines to be connected with the busbar on the side of the support plate away from the cell string, so that the space occupation of the busbar at the edge of the power generation unit can be reduced, more space can be left for the arrangement of the cell pieces on the support plate, and thus the overall size of the product can be reduced and the power generation efficiency per unit area of the photovoltaic module can be improved.

Description

Technical Field

[0001] This application belongs to the field of solar photovoltaic module technology, and in particular relates to a foldable photovoltaic module. Background Technology

[0002] Foldable photovoltaic (PV) modules are mainly used for outdoor on-demand power supply, DC input power for electronic products, energy storage product replenishment, and emergency outdoor power replenishment for new energy vehicles. Existing foldable PV modules suffer from two main drawbacks: firstly, their large size occupies a significant amount of space; secondly, the busbars and grid structure on the solar cells are typically located on the same side of the cells, affecting the power generation efficiency per unit area and leading to unstable power output. Utility Model Content

[0003] This application provides a foldable photovoltaic module that reduces size, makes it easy to carry, and improves the power generation efficiency per unit area of ​​the photovoltaic module.

[0004] This application provides a foldable photovoltaic module, comprising a power generation body, the power generation body including a plurality of power generation units spaced apart along a first direction and a folding portion located between two adjacent power generation units. The power generation unit includes: at least one battery string, the battery string including a plurality of battery cells connected in series along a first direction or a second direction, the second direction being perpendicular to the first direction; a support plate supporting the at least one battery string and having positioning grooves at both ends in the first direction or the second direction; a plurality of first electrical connection lines for discharging current from the battery string, the first electrical connection lines passing through the positioning grooves and bent to the side of the support plate opposite to the battery string; and a busbar disposed on the side of the support plate opposite to the battery string and connected to the plurality of first electrical connection lines.

[0005] In summary, the foldable photovoltaic module provided in this application has at least the following beneficial effects:

[0006] In the foldable photovoltaic module of this application, the support plate serves as a support for the battery string, which can protect the battery cells and prevent them from breaking due to external impact. The folding part is soft so that the power generation body can be folded in a W shape, and the size of the folded power generation body is only about the size of a single power generation unit. This reduces the size of the photovoltaic module, making it easy for users to carry and use, and is especially suitable for outdoor instant power supply. Furthermore, since the busbar is located on the side of the support plate away from the battery string and a positioning groove is provided at the end of the support plate for the first electrical connection line to pass through, multiple first electrical connection lines can be connected to the busbar on the side of the support plate away from the battery string. This reduces the space occupied by the busbar at the edge of the power generation unit, freeing up more space for the arrangement of the battery cells on the support plate, thereby reducing the overall size of the photovoltaic module and improving the power generation efficiency per unit area of ​​the photovoltaic module, which in turn helps to improve the stability of the output power of the photovoltaic module. On the other hand, it allows multiple battery cells to be connected in series along the first or second direction to form a battery string, so that a photovoltaic module with a suitable arrangement can be selected according to actual usage requirements. When multiple battery cells are connected in series along the second direction to form a battery string, it is beneficial for product upgrades and automation. Attached Figure Description

[0007] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application; those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0008] Figure 1 A schematic diagram of the front structure of a power generation body of a foldable photovoltaic module provided in an embodiment of this application;

[0009] Figure 2 for Figure 1 A schematic diagram showing the positional relationship between the first electrical connection line of the power generation body and the support plate;

[0010] Figure 3 for Figure 1 A schematic diagram of the rear structure of the power generation unit;

[0011] Figure 4 A schematic diagram of another front structure of the power generation body of the foldable photovoltaic module provided in the embodiments of this application;

[0012] Figure 5 for Figure 4 A schematic diagram showing the positional relationship between the first electrical connection line of the power generation body and the support plate;

[0013] Figure 6 for Figure 4 A schematic diagram of the rear structure of the power generation unit;

[0014] Figure 7 A cross-sectional schematic diagram of a power generation body in the region where the power generation unit is located, provided as an embodiment of this application;

[0015] Figure 8 A cross-sectional schematic diagram of a power generation body in the region where the folded portion is located, provided as an embodiment of this application;

[0016] Figure 9 This is a schematic diagram of the front structure of a first type of foldable photovoltaic module provided in an embodiment of this application;

[0017] Figure 10 for Figure 9 A schematic diagram of the back structure of the foldable photovoltaic module;

[0018] Figure 11 This is a schematic diagram of the front structure of a second type of foldable photovoltaic module provided in an embodiment of this application;

[0019] Figure 12 for Figure 11 A schematic diagram of the back structure of the foldable photovoltaic module;

[0020] Figure 13 This is a schematic diagram of the handle assembly provided in an embodiment of this application;

[0021] Figure 14 for Figure 9 A schematic diagram of the cross-section after being cut along line EE;

[0022] Figure 15 for Figure 14 Enlarged view corresponding to circle ① in the image;

[0023] Figure 16 for Figure 14 Enlarged view corresponding to circle ② in the image;

[0024] Figure 17 for Figure 14 Enlarged view of circle ③ in the image;

[0025] Figure 18 for Figure 14 A schematic diagram of the cross-section after being cut along the GG line;

[0026] Figure 19 for Figure 11 A schematic diagram of the structure of the power generation unit in the diagram;

[0027] Figure 20 for Figure 9 A schematic diagram of the cross-section after being cut along line FF;

[0028] Figure 21 for Figure 20 Enlarged view of circle ④ in the image;

[0029] Figure 22 This is a schematic diagram showing the positional relationship between the transparent upper light-shielding sheet and the lower projection sheet in the handle assembly;

[0030] Figure 23 A three-dimensional structural schematic diagram of a foldable photovoltaic module provided in an embodiment of this application;

[0031] Figure 24 for Figure 23 A three-dimensional structural diagram of the external support components;

[0032] Figure 25 A three-dimensional structural schematic diagram of another foldable photovoltaic module provided in an embodiment of this application;

[0033] Figure 26 for Figure 25 A three-dimensional structural diagram of the external support components;

[0034] Figure 27 This is a diagram showing the folded state of a foldable photovoltaic module provided in an embodiment of this application.

[0035] The attached figures are labeled as follows:

[0036] 100. Power generation unit;

[0037] 10. Power generation unit; 11. Battery string; 12. Support plate; 13. First electrical connection line; 14. Busbar; 20. Folding part; 30. Second electrical connection line; 40. Flexible body; 50. Colored layer; 60A. First lead-out line; 60B. Second lead-out line; 70. First protective layer; 80. Second protective layer; 90. Encapsulation layer;

[0038] 200. Handle assembly;

[0039] 210. Housing; 211. Top cover; 212. Bottom cover; 213. First support column; 214. Second support column; 215. Transparent dust cover; 216. Transparent upper light shield; 2161. Dark spot; 217. Lower slide; 2171. First ring line; 2172. Second ring line;

[0040] 220 Power output port; 230 Power meter; 240 Interface output port; 250 Voltage regulator; 260 Status indicator; 270 Magnetic alignment device;

[0041] V1, First opening; V2, Second opening; V3, Third opening; V4, Fourth opening; V5, Fifth opening; V6, Sixth opening; V7, Seventh opening;

[0042] T, positioning groove; S1, first groove; S2, second groove; S3, third groove; S4, fourth groove; S5, fifth groove; S6, sixth groove; S7, seventh groove; H1, first flange; H2, first flange;

[0043] 300. External support component; 310. Connecting and fixing part; 320. Support part; 330. Adjustment part; 331. First part; 332. Second part; 330A. First elastic band; 330B. Second elastic band; 340. Storage and fixing part;

[0044] L1, first direction; L2, second direction. Detailed Implementation

[0045] To make the above and other features and advantages of this application clearer, the present invention will be further described below with reference to the accompanying drawings. It should be understood that the specific embodiments given herein are for the purpose of explanation to those skilled in the art and are exemplary only, not restrictive.

[0046] Furthermore, features specified with "first" or "second" for descriptive purposes only should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Features specified with "first" or "second" may explicitly or implicitly include at least one of the specified features. The description of "multiple" generally means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0047] Reference Figures 1 to 6 The foldable photovoltaic module provided in this application includes a power generation body 100, which includes a plurality of power generation units 10 spaced apart along a first direction L1 and a folding portion 20 located between two adjacent power generation units 10.

[0048] The power generation body 100 serves as the main part of the photovoltaic module and is used for power generation. Multiple power generation units 10 of the power generation body 100 are arranged at intervals and connected as a whole by a folding part 20 located between each two adjacent power generation units 10. The folding part 20 is relatively flexible and deformable compared to the power generation unit 10. The folding part 20 and the power generation unit 10 are alternately arranged to form a hard shape with soft and hard intervals, thereby enabling the power generation body 100 to be unfolded and folded.

[0049] Each power generation unit 10 includes at least one battery string 11, a support plate 12, a plurality of first electrical connection lines 13, and a bus bar 14.

[0050] Understandably, in each power generation unit 10, the number of battery strings 11 can be one or more. When there are multiple battery strings 11, the multiple battery strings 11 can be arranged along the first direction L1. At this time, each battery string 11 includes multiple battery cells 111 connected in series along the second direction L2. The support plate 12 supports all the battery strings 11 in each power generation unit 10 and is provided with positioning grooves T at both ends of the second direction L2, such as... Figure 1 As shown. Alternatively, multiple battery strings 11 can be arranged along the second direction L2. In this case, each battery string 11 includes multiple battery cells 111 connected in series along the first direction L1. The support plate 12 supports all battery strings 11 in each power generation unit 10 and has positioning grooves T at both ends of the first direction L1, such as... Figure 4 As shown. Wherein, the second direction L2 is perpendicular to the first direction L1, and the second direction L2 and the first direction L1 are perpendicular to the thickness direction of the battery cell 111.

[0051] In each power generation unit 10, a plurality of first electrical connection wires 13 are used to conduct current from the battery string connected thereto. Each first electrical connection wire 13 passes through a corresponding positioning groove T and is bent to the side of the support plate 12 opposite to the battery string 11, so as to connect with the bus bar 14. Specifically, the first electrical connection wire 13 can be a metal wire coated with tin-lead coating, i.e., solder strip; the first electrical connection wire 13 can be a positive electrode solder strip or a negative electrode solder strip. Correspondingly, the bus bar 14 connected to the first electrical connection wire 13 can be a positive electrode bus bar or a negative electrode bus bar.

[0052] In each power generation unit 10, multiple battery strings 11 are connected in series or in parallel through busbars 14 to form a power generation unit 10. The busbars 14 are located on the side of the support plate 12 away from the battery strings 11 and are connected to multiple first electrical connection lines 13 to collect the current output from the multiple first electrical connection lines 13 and use it for output.

[0053] The support plate 12 serves as a support for the battery string 11 and possesses sufficient strength to ensure its support effect. Specifically, the support plate 12 can be made of high-strength non-metallic sheet material, primarily providing support strength for the photovoltaic module product and preventing damage and failure of internal components due to bending or external impact.

[0054] In the foldable photovoltaic module of this application, the support plate 12 serves as a support for the battery string 11, protecting the battery cells 111 and preventing them from breaking due to external impact. The folding part 20 is flexible to allow the power generation unit 100 to be folded in a W shape, and the size of the folded power generation unit 100 is only about the size of a single power generation unit 10 (e.g., Figure 27As shown in the figure, it reduces the size of photovoltaic modules, making them easier for users to carry and use. They are especially suitable for outdoor on-demand power needs, such as power for electronic products requiring DC input, energy storage products, and emergency power replenishment for new energy vehicles. Furthermore, since the busbar 14 is located on the side of the support plate 12 away from the battery string 11 and a positioning groove T is provided at the end of the support plate 12 for the first electrical connection line 13 to pass through, multiple first electrical connection lines 13 can be connected to the busbar 14 on the side of the support plate 12 away from the battery string 11. This reduces the space occupied by the busbar 14 at the edge of the power generation unit 10, freeing up more space for the arrangement of the battery cells 111 on the support plate 12, thereby reducing the overall size of the photovoltaic module and improving the power generation efficiency per unit area of ​​the photovoltaic module, which in turn helps to improve the stability of the output power of the photovoltaic module. On the other hand, it allows multiple battery cells 111 to be connected in series along the first direction L1 or the second direction L2 to form a battery string 11, so that a photovoltaic module with a suitable arrangement can be selected according to actual usage requirements. When multiple battery cells 111 are connected in series along the second direction L2 to form a battery string 11, it is beneficial for product upgrades and automation.

[0055] In addition, most of the existing foldable photovoltaic modules use TOPCon or PERC cells, while the foldable photovoltaic module of this application can use TOPCon or PERC cells, as well as BC cells (i.e., back contact cells). When using BC cells, the front of the cell 111 is free of grid lines and solder ribbons, resulting in higher photoelectric conversion efficiency.

[0056] In some embodiments, a row of spaced positioning slots T is provided at both ends of the support plate 12, and each first electrical connection wire 13 passes through a corresponding positioning slot T. Of course, only one positioning slot T may be provided at each end of the support plate 12, and the positioning slot T may be elongated and allow multiple first electrical connection wires 13 to pass through.

[0057] Reference Figure 3 and Figure 6 The power generation body 100 in this embodiment further includes a second electrical connection line 30, which is used to connect the busbars 14 in two adjacent power generation units 10. Depending on the number of power generation units 10, the number of second electrical connection lines 30 can be one or more, so that the power generation body 100 can connect multiple power generation units 10 in series through at least one busbar 14.

[0058] For each second electrical connection wire 30, at least a portion of the second electrical connection wire 30 is located in the fold portion 20; that is, a portion of the second electrical connection wire 30 may be located in the fold portion 20, or all of the second electrical connection wire 30 may be located in the fold portion 20. The portion of the second electrical connection wire 30 located in the fold portion 20 is provided with a flexible body 40. Specifically, the second electrical connection wire 30 may be a metal wire coated with a tin-lead coating, preferably a multi-strand braided metal wire, wherein the metal wire may also be referred to as a metal solder strip.

[0059] By using multi-strand braided metal wire to form the second electrical connection line 30 in this application, the product flexibility in the area where the folded part 20 is located can be guaranteed, and the internal stress of the material when the second electrical connection line 30 is bent can be reduced, thus extending the service life of the second electrical connection line 30 after repeated bending.

[0060] Furthermore, a flexible body 40 is provided in the portion of the second electrical connection 30 located at the fold 20, which can further increase the elasticity of the area where the fold 20 is located, thereby further extending the service life of the second electrical connection 30 after repeated bending.

[0061] Specifically, in some embodiments, the flexible body 40 can be a flexible sleeve structure, which is directly sleeved on the outer side of the portion of the second electrical connection line 30 located in the folded portion 20. This arrangement can ensure the flexibility of the area where the folded portion 20 is located while facilitating installation, thereby helping to improve installation efficiency.

[0062] In other embodiments, the flexible body 40 is a flexible coating, and at least a portion of the flexible body 40 is disposed on the outside of the portion of the second electrical connection line 30 located in the folded portion 20. Specifically, part or all of the flexible body 40 may be disposed on the outside of the portion of the second electrical connection line 30 located in the folded portion 20, or part of the flexible body 40 may be disposed on the outside of the portion of the second electrical connection line 30 located in the folded portion 20, and part may be embedded within the second electrical connection line 30.

[0063] Since the flexible body 40 is a flexible coating, when the flexible coating material is applied to the second electrical connection line 30 to form the flexible body 40, the flexible coating material can fill the gaps between the tin-lead coated metal wires or multi-strand braided metal wires and maintain the elasticity of that section of the second electrical connection line 30. This prevents the molten adhesive film (such as EVA film or POE film) from entering the gaps between the tin-lead coated metal wires or multi-strand braided metal wires during the heat sealing process (if the adhesive film enters the gaps, the second electrical connection line 30 will lose its flexibility after curing). This makes the tin-lead coated metal wires or multi-strand braided metal wires become a flexible whole, thus ensuring that each strand of the metal wires or multi-strand braided metal wires has sufficient elastic deformation space when folded in the area where the folding part 20 is located. This increases the elasticity of the area where the folding part 20 is located and extends the service life of the second electrical connection line 30 under repeated bending. Optionally, the flexible coating can be a potting compound, TPE, TPU, TPEE, TPES, TPEA, or other materials.

[0064] In some embodiments, refer to Figure 3 and Figure 6 The distance A between the second electrical connection line 30 and the edge of its adjacent power generation body 100 in the second direction L2 is 20mm ≤ A ≤ 300mm. For example, A can be 20mm, 40mm, 60mm, 80mm, 100mm, 120mm, 140mm, 160mm, 180mm, 200mm, 220mm, 240mm, 260mm, 280mm, 300mm, etc.

[0065] Since at least a portion of the second electrical connection line 30 passes through the folded portion 20, the second electrical connection line 30 can ensure the strength of the area where the folded portion 20 is located. If A is too small, the second electrical connection line 30 will be set too close to the edge of the power generation body 100, and the edge area is prone to cracking or deformation when the folded portion 20 is bent or folded. If A is too large, the second electrical connection line 30 will be far from the edge of the power generation body 100, and the stress may not be effectively distributed, resulting in a greater load on the local area, thereby reducing the overall strength of the structure.

[0066] Therefore, by setting the distance A between the second electrical connection line 30 and the edge of its adjacent power generation body 100 in the second direction L2 within the aforementioned range, it is possible to avoid the problems of cracking or deformation of the edge area due to A being too small and reduction of the overall structural strength due to A being too large.

[0067] In some embodiments, refer to Figure 1 , Figure 3 as well as Figure 7 and Figure 8The power generation body 100 also includes a colored layer 50, which is disposed at least between the folded portion 10 and the battery cells 111 and / or battery strings 11 of the power generation unit 10.

[0068] Understandably, the colored layer 50 is a structure with a specific color, and the colored layer 50 can be made from materials of a specific color according to specific usage requirements. Specifically, the colored layer 50 can be a colored film or a colored fabric.

[0069] Since the encapsulation material may obscure or alter the color differences between different areas after heat fusion sealing, this application adds an additional colored layer 50 to make the non-battery areas of the power generation body 100 present a uniform color, thereby increasing the overall aesthetics of the power generation body 100.

[0070] In some embodiments, refer to Figure 1 and Figure 3 The support plate 12 is spaced apart from the edge of the power generation body 100. The area between the support plate 12 and the edge of the power generation body 100 is called the edge area. The edge area can be a region with a distance of 2 to 15 mm from the edge to the support plate 12. The support plate 12 is not provided in the edge area of ​​the power generation body 100 (i.e., the support plate 12 is not set beyond the power generation body 100). This makes the edge area of ​​the power generation body 100 a soft and elastic area, which can effectively buffer collisions, reduce the risk of internal battery cell breakage and failure, and also enhance the user's sensory experience.

[0071] Furthermore, the colored layer 50 can also be disposed in the perimeter area between the battery cell 111 and the power generation body 100, thereby further enhancing the overall aesthetics of the power generation body 100. In other words, the colored layer 50 is disposed in the non-battery area of ​​the power generation body 100, which includes the area where the fold 10 between the power generation units 10 is located, the area between the battery cells 111 and / or battery strings 11 in the power generation unit 10, and the area between the battery cells 111 and the edge of the power generation body 100.

[0072] In some embodiments, refer to Figure 3 and Figure 6 The power generation unit 100 also includes a first lead 60A and a second lead 60B with the opposite polarity to the first lead 60A.

[0073] In the first direction L1, the first lead 60A is connected to the busbar 14 of the outermost power generation unit 10, and the second lead 60B passes through the plurality of power generation units 10 and the folded portion 20 located between the power generation units 10 and is connected to the busbar 14 of the outermost power generation unit 10. A flexible body 40 is provided on the portion of the second lead 60B located in the folded portion 20.

[0074] It should be noted that the flexible body 40 on the second lead 60B in this embodiment has the same structure and material as the flexible body 40 on the second electrical connection line 30 described above, and its purpose is also the same, so it will not be repeated here.

[0075] The first lead 60A and the second lead 60B have opposite polarities and are used to output the current collected by the busbar 14. When the polarity of one of the first lead 60A and the second lead 60B is negative, the other is positive. Specifically, the first lead 60A and / or the second lead 60B can be metal wires coated with tin-lead or multi-strand braided metal wires to ensure the flexibility of the first lead 60A and / or the second lead 60B themselves.

[0076] In this embodiment, by connecting the first lead 60A to the busbar 14 of the outermost power generation unit 10, and by passing the second lead 60B through the plurality of power generation units 10 and the fold 20 located between the power generation units 10 and connecting it to the busbar 14 of the outermost power generation unit 10, it is possible to achieve the same-end output (i.e., the output end of the photovoltaic module product) of one end of the first lead 60A and the second lead 60B in the first direction L1. This helps to reduce the overall size of the photovoltaic module product, thereby improving the power generation efficiency per unit area of ​​the photovoltaic module.

[0077] In some embodiments, refer to Figure 3 and Figure 6 The portion of the second lead 60B closest to the first lead 60A is spaced apart from the first lead 60A in the second direction L2 by a distance D, where 3mm ≤ D ≤ 10mm. For example, D can be 3mm, 3.5mm, 4mm, 4.5mm, 5mm, 5.5mm, 6mm, 6.5mm, 7mm, 7.5mm, 8mm, 8.5mm, 9mm, 9.5mm, 10mm, etc.

[0078] Specifically, such as Figure 1 As shown, when multiple battery cells 111 in the battery string 11 of each power generation unit 10 are arranged along the second direction L2, the busbars 14 are located at both ends of each power generation unit 10 in the second direction L2. The first lead 60A is connected to the busbar 14 of the outermost power generation unit 10. The second lead 60B is located between the two busbars 14 in the second direction L2 and extends along the first direction L1. One end of the second lead 60B is connected to the busbar 14 of the other outermost power generation unit 10, and the other end is located at the same end of the power generation body 100 as the first lead 60A. The other end of the second lead 60B is spaced apart from the first lead 60A in the second direction L2 with a spacing of D.

[0079] like Figure 4 As shown, when multiple battery cells 111 in the battery string 11 of each power generation unit 10 are arranged along the first direction L1, the busbars 14 are located at both ends of each power generation unit 10 in the first direction L1. The first lead 60A is connected to the busbar 14 of the outermost power generation unit 10. The second lead 60B is located outside all the busbars 14 in the second direction L2. One end of the second lead 60B is connected to the busbar 14 of the outermost power generation unit 10, and the other end is located at the same end of the power generation body 100 as the first lead 60A. The other end of the second lead 60B is spaced apart from the first lead 60A in the second direction L2 with a spacing of D.

[0080] In this embodiment, the portion of the second lead 60B near the first lead 60A is spaced apart from the first lead 60A in the second direction L2, with the spacing D set within the aforementioned range. This prevents the first lead 60A and / or the second lead 60B from coming into contact and short-circuiting when they are displaced by external force. Furthermore, to avoid overlapping short circuits, an insulating layer can be provided between the portion of the second lead 60B near the first lead 60A and the first lead 60A.

[0081] In some embodiments, refer to Figure 3 and Figure 6 The distance between the second lead-out line 60B and the edge of its adjacent power generation body 100 in the second direction L2 is B, and 100mm≤B≤300mm.

[0082] For example, B can be 100mm, 110mm, 120mm, 130mm, 140mm, 150mm, 160mm, 170mm, 180mm, 190mm, 200mm, 210mm, 220mm, 230mm, 240mm, 250mm, 260mm, 270mm, 280mm, 290mm, 300mm, etc.

[0083] Setting the distance B between the second lead-out line 60B and the edge of its adjacent power generation body 100 in the second direction L2 within the aforementioned range can avoid problems such as cracking or deformation of the edge area due to B being too small, and reduction of the overall structural strength due to B being too large.

[0084] In some embodiments, refer to Figure 7 and Figure 8 The power generation body 100 also includes a first protective layer 70, a second protective layer 80, and an encapsulation layer 90.

[0085] The first protective layer 70 is disposed in the area where the power generation unit 10 and the folded portion 20 are located, and is located on the side of the battery string 11 of each power generation unit 10 facing away from the support plate 12. The second protective layer 80 is disposed in the area where the power generation unit 10 and the folded portion 20 are located, and is located on the side of the support plate 12 facing away from the battery string 11. That is, the first protective layer 70 and the second protective layer 80 are disposed opposite to each other in the thickness direction of the battery cell 111. The encapsulation layer 90 is disposed between the first protective layer 70 and the battery string 11, between the battery string 11 and the support plate 12, and between the support plate 12 and the second protective layer 80.

[0086] Since the first protective layer 70 and the second protective layer 80 are in direct contact with the external environment, they can be made of, but are not limited to, the following materials: ETFE, PVDF, PVF, etc.; ultra-thin, highly elastic, high light transmittance, high water resistance, high weather resistance and similar membrane materials; high-transparency sheets, fiberglass prepregs, etc. Additionally, different patterns can be hot-pressed onto the first protective layer 70 and / or the second protective layer 80 using special molds to protect the internal battery cells 111, preventing product contamination, scratches, oxidation, and failure due to impact from hard objects, while also enhancing the product's aesthetics.

[0087] The encapsulation layer 90 can have one or more layers and can be made of light-transmitting hot melt film material. Its main function is to encapsulate the battery cell 111 and its electrode structure, circuit structure connected to the battery cell 111, support member 12, first protective layer 70 and second protective layer 80 into one unit to block water and gas in the environment to prevent oxidation of the battery cell 111, short circuit of internal circuit, and cracking of the battery cell 111.

[0088] Understandably, for the area where power generation unit 10 is located, such as Figure 7 As shown, in the thickness direction of the battery cell 111, the first protective layer 70, the encapsulation layer 90, the battery string 11 and the colored layer 50 (in the same layer), the second electrical connection line 30, the encapsulation layer 90 and the second protective layer 80 are stacked in sequence. During the thermal encapsulation process, the encapsulation layer 90 is molten and solidified in the area where the power generation unit 10 of the power generation body 100 is located.

[0089] For the area where the fold 20 is located, such as Figure 8 As shown, in the thickness direction of the battery cell 111, the first protective layer 70, the encapsulation layer 90, the colored layer 50, the second electrical connection line 30 and its outer flexible body 40 (considered as one layer), the encapsulation layer 90 and the second protective layer 80 are stacked in sequence, and during the heat sealing process, the encapsulation layer 90 is molten and solidified to form the area where the folded portion 20 of the power generation body 100 is located.

[0090] Therefore, in this application, since the second electrical connection wire 30 is at least partially inserted into the area where the folded portion 20 is located, and the second electrical connection wire 30 can be formed using multi-strand braided metal wire, the flexibility of the product in the area where the folded portion 20 is located can be ensured, and the internal stress of the material when the second electrical connection wire 30 is bent can be reduced, thereby extending the service life of the second electrical connection wire 30 under repeated bending. Furthermore, since a flexible body 40 is provided on the portion of the second electrical connection wire 30 located in the folded portion 20, the elasticity of the area where the folded portion 20 is located can be further increased based on the provision of the flexible body 40, thereby further extending the service life of the second electrical connection wire 30 under repeated bending.

[0091] Understandably, the edge region between the battery cell 111 and the edge of the power generation body 100 includes a first protective layer 70, an encapsulation layer 90, a colored layer 50, an encapsulation layer 90, and a second protective layer 80 stacked in sequence, but without a support plate 12. This makes the edge region of the power generation body 100 a soft and elastic region, which can effectively buffer collisions, reduce the risk of internal battery cell breakage and failure, and also enhance the user's sensory experience.

[0092] Specifically, the power generation body 100 can be a single-sided power generation body or a double-sided power generation body.

[0093] When the photovoltaic module 100 is a single-sided photovoltaic module, the support plate 12 can be a rigid transparent support or a rigid non-transparent support. The first protective layer 70 on the front of the photovoltaic module can be a water-blocking and anti-fouling film, and the second protective layer 80 on the back of the photovoltaic module can be a waterproof cloth. Specifically, the second protective layer 80 can be made of anti-fouling and waterproof cloth, cloth-like materials, leather, leather-like materials, etc., to provide anti-fouling, water-blocking, and wear-resistant properties for the photovoltaic module product, thereby improving the appearance and texture of the photovoltaic module product.

[0094] When the power generation body 100 is a double-sided power generation body, the support plate 12 can be a rigid transparent support component. The first protective layer 70 on one side of the photovoltaic module can be a water-blocking and anti-fouling film or a high-transparency plate, and the second protective layer 80 on the other side of the photovoltaic module can be a water-blocking and anti-fouling high-transparency film or a light-transmitting plate.

[0095] In some embodiments, refer to Figures 9 to 12 The power generation body 100 is provided with a handle assembly 200 at least one end in the first direction L1. Specifically, when the number of power generation units 10 in the power generation body 100 is one, there is one handle assembly 200 and it is provided at one end of the power generation body 100 in the first direction L1; when the number of power generation units 10 in the power generation body 100 is more than one, there are two handle assemblies 200 and they are provided at both ends of the power generation body 100 in the first direction L1.

[0096] Reference Figure 13 The handle assembly 200 includes a housing 210, a power output port 220, and a power meter 230. The housing 210 serves as the main handle for lifting the generator unit 100. The power output port 220 is integrated into the housing 210 and includes, but is not limited to, DC, LCB, XT, T-plug, and EC male-female connectors. The power output port 220 can directly charge energy storage devices and can also be used to connect multiple generator units 100 in series or parallel to achieve different output voltage, output current, and output power ranges to meet various usage requirements.

[0097] The power meter 230 is also integrated into the housing 210. One end of the power meter 230 is electrically connected to the generator body 100, and the other end is electrically connected to the power output port 220. Specifically, the power meter 230 can be a digital display power meter. Since the digital display power meter has an LCD screen and data acquisition and processing circuitry, it can collect and display the voltage, current, and output power of the generator in real time, thereby making the power generation performance of the generator body 100 visible. In addition, the display page of the digital display power meter can be automatically refreshed or manually refreshed by flipping pages. By setting the display function on the digital display power meter, the product status and irradiance intensity can be displayed. Furthermore, when the power meter 230 in this application malfunctions, it does not affect the direct output of the product's current and voltage.

[0098] Therefore, in this application, when the user uses the foldable photovoltaic module, they unfold it and insert the power cord of an outdoor power source or battery into the power output port 220 to charge it. During charging, based on the settings of the power meter 230, the power meter 230 can display charging data in real time, providing a good visualization effect. Simultaneously, integrating the power output port 220 and the power meter 230 into the housing 210 used for lifting the photovoltaic module product results in a small overall size and light weight for the photovoltaic module product, making it easy to carry and improving the user experience.

[0099] In some embodiments, refer to Figure 13 The handle assembly 200 also includes an interface output port 240 and a voltage regulator 250. The interface output port 240 is disposed on the housing 210. One end of the voltage regulator 250 is electrically connected to the generator body 100, and the other end is electrically connected to the interface output port 240. The interface output port 240 may include one or more USB interfaces, one or more Type-C interfaces, or a combination of one or more USB interfaces and one or more Type-C interfaces.

[0100] In this application, the voltage regulator 250 can directly charge electronic products (such as mobile phones, headphones, tablets, flashlights, etc.) through the interface output port 240 and the corresponding data cable, eliminating the need for intermediate charging via power banks or other means, making it simple and convenient to use and improving the user experience. Furthermore, the voltage regulator 250 can be configured to support QC3.0 fast charging, outputting a voltage of 0-60V and a current of 0-15A. It can also automatically respond to the needs of digital electronic products by incorporating multiple charging protocols, thereby stably outputting the corresponding configured DC voltage to directly charge digital electronic products.

[0101] In some embodiments, refer to Figure 13 The handle assembly 200 also includes a status indicator 260, which is integrated into the housing 210. The status indicator 260 may be designed to have some or all of the following functions: such as a Bluetooth status interaction display module, a status display module with lights, and an audible status indicator module. The Bluetooth status interaction display module has a data acquisition signal line connected to the product's internal circuitry, enabling it to collect internal electrical data, wirelessly transmit it to connected digital products, and display interactive information such as product charging status, charging data, charging time, solar irradiance intensity, product health status, and fault alarms. The status display module with lights can display the product's charging status, solar irradiance intensity, product health status, and fault alarms by the number of lights on and off; the audible status indicator module can indicate the product's charging status, product health status, and fault alarms by sounding different beeps.

[0102] In some embodiments, refer to Figure 13 The handle assembly 200 also includes a magnetic alignment device 270, which is integrated into the housing 210 and disposed at both ends of the housing 210 in the second direction L2. After the foldable photovoltaic module of this application is folded, the magnetic alignment devices 270 on the handle assemblies 200 at both ends of the power generation body 100 are magnetically attracted to each other, so that the multiple power generation units 10 of the power generation body 100 are firmly folded together, thus making it difficult to unfold during carrying.

[0103] In some embodiments, refer to Figures 14 to 18 The housing 210 includes an upper cover 211, a lower cover 212, a first support column 213, and a second support column 214.

[0104] The lower cover 212 is positioned opposite and connected to the upper cover 211 along the thickness direction of the battery cell 111, forming a mounting cavity. A first support column 213 is disposed on the lower cover 212 within the mounting cavity and fixes the power meter 230 thereon. A second support column 214 is disposed on the lower cover 212 within the mounting cavity and fixes the voltage regulator 250 thereon. Specifically, the power meter 230 can be fixed to the first support column 213 by means of clips or screws, and the voltage regulator 250 can be fixed to the second support column 214 by means of clips or screws.

[0105] In this embodiment, the housing 210 is used to lift the photovoltaic module product. The power meter 230 and the voltage regulator 250 are respectively installed by setting the first support column 213 and the second support column 214 inside the housing 210, thereby integrating the power meter 230 and the voltage regulator 250 inside the housing 210. This can protect the power meter 230 and the voltage regulator 250 from external environmental interference and improve the display accuracy of the power meter 230 and the voltage regulator 250.

[0106] In some embodiments, refer to Figure 19 The generator body 100 has a first opening V1 and a first opening V2 on the portion corresponding to the handle assembly 200. The upper cover 211 and the lower cover 212 pass through the first opening V1 and the first opening V2 and are fastened together. The first lead wire 60A of the generator body 100 is located at the position of the handle assembly 200, and a portion of the second lead wire 60B is located at the position of the handle assembly 200. After the upper cover 211 and the lower cover 212 are fastened together, the portions of the first lead wire 60A and the second lead wire 60B can be enclosed inside the housing 210 to isolate them from the outside.

[0107] In some embodiments, refer to Figure 15 The upper cover 211 has a first groove S1, and the first groove S1 has a third opening V3 facing the bottom wall of the power meter 230. The housing 210 also includes a transparent dust cover 215, which is installed in the first groove S1 and allows the power meter 230 to be seen through the third opening V3. The transparent dust cover 215 is made of transparent material, allowing the user to observe the displayed data on the power meter 230 through the transparent dust cover 215 and the third opening V3.

[0108] In some embodiments, refer to Figure 17 The lower cover 212 has a second groove S2 inside, and the bottom wall of the second groove S2 facing the power output port 220 has a fourth opening V4. At least part of the power output port 220 is disposed in the fourth opening V4 and is fixed to the lower cover 212 by a buckle or screw.

[0109] In some embodiments, refer to Figure 18The lower cover 212 has a third groove S3 inside, and the bottom wall of the third groove S3 facing the interface output port 240 has a fifth opening V5. At least a part of the interface output port 240 is located in the fifth opening V5, and the interface output port 240 is fixed to the lower cover 212 by a buckle or screw.

[0110] In some embodiments, refer to Figure 20 and Figure 21 The upper cover 211 is provided with a fourth groove S4, and the bottom wall of the fourth groove S4 is provided with a sixth opening V6. The lower cover 212 is provided with a fifth groove S5, and the bottom wall of the fifth groove S5 is provided with a seventh opening V7, which is connected to the sixth opening V6.

[0111] The sixth opening V6 can be provided with a first flange H1 at the end away from the fourth groove S4, and the seventh opening V7 can be provided with a second flange H2 at the end away from the fifth groove S5. The first flange H1 and the second flange H2 can be used to position and install the upper cover 211 and the lower cover 212.

[0112] Reference Figures 20 to 22 The housing 210 also includes a transparent upper light-shielding sheet 216 and a lower projection sheet 217. The transparent upper light-shielding sheet 216 is installed in the fourth groove S4, and the lower projection sheet 217 is installed in the fifth groove S5 and is positioned opposite to the upper light-shielding sheet 216. The transparent upper light-shielding sheet 216 has dark spots 2161, which cast shadows on the lower projection sheet 217 when light passes through it. The installation angle of the foldable photovoltaic module is adjusted according to the position of the shadow on the lower projection sheet 217.

[0113] Reference Figure 23 The lower projection sheet 217 is provided with a first ring line 2171 and a second ring line 2172 surrounding the first ring line 2171. The power generation of the power generation body 100 can be determined based on the shadow formed on the lower projection sheet 217 when light passes through the transparent upper light shield 216 and is located in the area of ​​the first ring line 2171 or the second ring line 2172.

[0114] Specifically, when the shadow cast on the lower projection sheet 217 by light penetrating the transparent upper shading sheet 216 is located in the central region of the first ring line 2171, the power generation unit 100 is perpendicular to the sunlight, and the photovoltaic module has the maximum power generation. When the shadow cast on the lower projection sheet 217 by light penetrating the transparent upper shading sheet 216 is located in the region between the second ring line 2172 and the first ring line 2171, the installation angle of the foldable photovoltaic module can be adjusted until the shadow is located in the central region of the first ring line 2171.

[0115] In some embodiments, the shape of the dark spot 2161 provided on the transparent upper light-shielding sheet 216 can be circular, square, or triangular. Correspondingly, the first ring line 2171 and the second ring line 2172 provided on the lower projection sheet 217 can also be circular, square, or triangular.

[0116] In some embodiments, refer to Figure 10 and Figure 12 as well as Figures 23 to 26 The foldable photovoltaic module of this application also includes at least one external support member 300. The external support member 300 is disposed on the side of the support plate 12 of the power generation body 100 away from the battery string 11 and connected to the power generation body 100. The number of external support members 300 can be one or more, and the number of external support members 300 can be determined based on the number of power generation units 10, such as the number of external support members 300 can be half the number of power generation units 10.

[0117] Specifically, the external support 300 includes a connecting and fixing part 310, a supporting part 320, an adjusting part 330, and a storage and fixing part 340.

[0118] The connecting and fixing part 310 is connected to the power generation body 100, the supporting part 320 is connected to the connecting and fixing part 310 and supports the power generation body 100, the adjusting part 330 is used to adjust the supporting angle between the supporting part 320 and the power generation body 100, and the storage and fixing part 340 is set on the supporting part 320 and the power generation body 100. After the power generation body 100 is folded, the supporting part 320 is fixed on the power generation body 100 through the storage and fixing part 340.

[0119] Specifically, the connecting and fixing part 310 can be provided with multiple fixing holes, and the connecting and fixing part 310 is fixed to the generator body 100 through the fixing holes. Of course, the connecting and fixing part 310 can also be fixed to the generator body 100 by metal snap fasteners and chemical adhesive.

[0120] In this embodiment, the external support 300 is connected to the power generation body 100 via the connecting and fixing part 310. The support part 320 supports the power generation body 100 after the foldable photovoltaic module of this application is unfolded. By adjusting the state of the adjusting part 330, the support angle between the support part 320 and the power generation body 100 can be adjusted, so that the support part 320 can stably support the power generation body 100. After the foldable photovoltaic module is folded, the external support 300 can be fixed to the power generation body 100 via the storage and fixing part 340. Therefore, based on the cooperation between the connecting and fixing part 310, the support part 320, the adjusting part 330, and the storage and fixing part 340 of this application, the user can conveniently adjust the angle between the power generation body 100 and sunlight, so that the photovoltaic module can generate electricity with optimal power output.

[0121] In some embodiments, refer to Figure 23 and Figure 24 The adjustment part 330 is a single elastic rubber band. The adjustment part 330 includes a first part 331 and a second part 332. The first part 331 can be detachably fixed to the power generation body 100. The support part 320 adjusts the support angle between itself and the power generation body 100 by adjusting the tension of the second part 332.

[0122] In some embodiments, refer to Figure 25 and Figure 26 The adjusting part 330 includes a first elastic band 330A and a second elastic band 330B. The two ends of the first elastic band 330A are fixed to the supporting part 320. One end of the second elastic band 330B is connected to the first elastic band 330A, and the other end is detachably fixed to the power generation body 100. The supporting angle between the supporting part 320 and the power generation body 100 is adjusted by stretching and contracting the lengths of the second elastic band 330B and the first elastic band 330A.

[0123] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A foldable photovoltaic module, characterized in that, The device includes a power generation body (100), which comprises a plurality of power generation units (10) spaced apart along a first direction (L1) and a fold (20) located between two adjacent power generation units (10). Each power generation unit (10) includes: At least one battery string (11), the battery string (11) comprising a plurality of battery cells (111) connected in series along a first direction (L1) or a second direction (L2), the second direction (L2) being perpendicular to the first direction (L1); A support plate (12) supports at least one battery string (11) and has positioning grooves (T) at both ends in the first direction (L1) or the second direction (L2); Multiple first electrical connection wires (13) are provided for draining current from the battery string, and the first electrical connection wires (13) pass through the positioning groove (T) and bend to the side of the support plate (12) opposite to the battery string (11); and Busbar (14) is disposed on the side of the support plate (12) away from the battery string (11) and connected to the plurality of first electrical connection lines (13).

2. The foldable photovoltaic module according to claim 1, characterized in that, The power generation unit (10) includes a plurality of battery strings (11), which are connected in series or in parallel through the busbar (14).

3. The foldable photovoltaic module according to claim 1, characterized in that, The power generation body (100) further includes: a second electrical connection line (30) for connecting the busbars (14) in two adjacent power generation units (10) to connect the two adjacent power generation units (10) in series, and at least a portion of the second electrical connection line (30) is located in the fold (20), the portion of the second electrical connection line (30) located in the fold (20) is provided with a flexible body (40), the flexible body (40) preferably being a flexible coating; and / or The second electrical connection wire (30) is a multi-strand braided metal wire; and / or The distance between the second electrical connection line (30) and the edge of the adjacent power generation body (100) in the second direction (L2) is A, and 20mm≤A≤300mm.

4. The foldable photovoltaic module according to claim 1, characterized in that, The power generation body (100) also includes a colored layer (50), which is disposed at least between the folded portion (20) and the battery cells (111) and / or battery strings (11) of the power generation unit (10).

5. The foldable photovoltaic module according to claim 1, characterized in that, The power generation body (100) also includes a first lead (60A) and a second lead (60B) with the opposite polarity to the first lead (60A); In the first direction (L1), the first lead (60A) is connected to the busbar (14) of the outermost power generation unit (10), and the second lead (60B) passes through the plurality of power generation units (10) and the fold (20) between the power generation units (10) and is connected to the busbar (14) of the outermost power generation unit (10). The portion of the second lead wire (60B) located in the folded portion (20) is provided with a flexible body (40).

6. The foldable photovoltaic module according to claim 5, characterized in that, The portion of the second lead (60B) closest to the first lead (60A) is spaced apart from the first lead (60A) in the second direction (L2) with a spacing of D, 3mm ≤ D ≤ 10mm; and / or The distance between the second lead (60B) and the edge of its adjacent power generation body (100) in the second direction (L2) is B, and 100mm≤B≤300mm.

7. The foldable photovoltaic module according to claim 1, characterized in that, The power generation unit (100) also includes: A first protective layer (70) is disposed on the power generation unit (10) and the folded portion (20) and located on the side of the battery string (11) away from the support plate (12); A second protective layer (80) is disposed on the power generation unit (10) and the folded portion (20) and located on the side of the support plate (12) opposite to the battery string (11); and An encapsulation layer (90) is disposed between the first protective layer (70) and the battery string (11), between the battery string (11) and the support plate (12), and between the support plate (12) and the second protective layer (80).

8. The foldable photovoltaic module according to any one of claims 1-7, characterized in that, The power generation body (100) is provided with a handle assembly (200) at at least one end in the first direction (L1), the handle assembly (200) comprising: Shell (210); A power output port (220) is provided on the housing (210), and a power meter (230) is provided, one end of which is electrically connected to the power generation body (100) and the other end of which is electrically connected to the power output port (220); Preferably, the handle assembly (200) further includes: an interface output port (240) disposed on the housing (210); and a voltage regulator (250), one end of which is electrically connected to the generator body (100) and the other end of which is electrically connected to the interface output port (240).

9. The foldable photovoltaic module according to claim 8, characterized in that, The housing (210) includes: Top cover (211); The lower cover (212) is disposed opposite to and connected to the upper cover (211) along the thickness direction of the battery cell (111) and forms a mounting cavity; A first support column (213) is disposed on the lower cover (212) within the mounting cavity and the power meter (230) is fixedly mounted thereon; and The second support column (214) is disposed on the lower cover (212) within the mounting cavity and the voltage regulator (250) is fixedly installed thereon.

10. The foldable photovoltaic module according to claim 9, characterized in that, The upper cover (211) is provided with a fourth groove (S4), and the bottom wall of the fourth groove (S4) is provided with a fifth opening (V5). The lower cover (212) is provided with a fifth groove (S5), and the bottom wall of the fifth groove (S5) is provided with a sixth opening (V6). The sixth opening (V6) communicates with the fifth opening (V5). The housing (210) further includes a transparent upper light-shielding sheet (216) and a lower projection sheet (217). The transparent upper light-shielding sheet (216) is installed in the fourth groove (S4), and the lower projection sheet (217) is installed in the fifth groove (S5) and is disposed opposite to the upper light-shielding sheet (216). The transparent upper light-shielding sheet (216) is provided with dark spots (2161). When light passes through the transparent upper light-shielding sheet (216), the dark spots (2161) can form a shadow on the lower projection sheet (217). The installation angle of the foldable photovoltaic module is set to be adjusted according to the position of the shadow on the lower projection sheet (217).

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