A large folding ratio solar cell structure with easy unfolding and folding

Abstract

This invention discloses a modular solar cell structure with a large retraction ratio that is easy to deploy and retract. It consists of interconnected solar panel modules and flexible hinges. Utilizing origami mechanics, a biomimetic structural retraction unit with excellent retraction characteristics is obtained. Thick-plate origami theory analysis is conducted, and the geometric parameters of the structure are designed considering both retraction effect and manufacturability. Further extensions are made to increase the number of panels and improve the working retraction ratio. The advantages of this invention include a large retraction ratio, convenient storage, good manufacturability, low error sensitivity, and modular processing and assembly. It has a wide range of applications and primarily solves the problem of cumbersome storage in existing portable solar cells, providing a new solution for the design of portable solar cells with a large retraction ratio.

Description

Technical Field

[0001] This invention relates to the field of foldable solar cell structures, and particularly to a portable foldable solar cell structure with a large refractive index, easy deployment and retraction, and modularity. Background Technology

[0002] With the rapid development of the national economy and the continuous progress of society, electronic devices and digital products have become indispensable tools in people's work and life, and these products have a very high demand for and dependence on electricity. Solar energy is an inexhaustible renewable energy source for mankind, with advantages such as cleanliness, safety, low cost, and easy accessibility. Utilizing solar cell power generation technology to convert solar energy into electricity is the mainstream of solar power generation today. Currently, solar cell power generation technology has been widely used in aerospace, transportation, communication, construction and other fields, and with the continuous development of technology, it will play an even more important role in energy strategy.

[0003] Solar cells have numerous applications, and their functions dictate the requirements for their structural parameters. For example, solar arrays in aerospace equipment need to meet requirements for a high refractive index and automatic, precise deployment, while solar cells in public facilities such as streetlights need to withstand extreme weather conditions. Portable solar cells, which are more closely integrated into people's daily lives, need to be small in size, have sufficient power, and be easily portable, primarily used for powering electronic devices during outdoor travel and other similar scenarios.

[0004] Current portable solar cells still have some problems. Most portable solar cells use simple one- or two-dimensional rectangular folding mechanisms for storage, which involve complex unfolding and folding processes, limited folding-to-unfold ratios, and inconvenience for carrying and transporting. Solar cells made with special unfoldable structures only have good unfolding processes; their folding and storage are still very cumbersome, and issues such as the mechanism being stuck in a dead point can occur. Furthermore, the folded and unfolded dimensions of portable solar cells are fixed, limiting their versatility for different working scenarios.

[0005] In conclusion, portable solar cells are designed for convenient daily use and require consideration of many functional needs; therefore, the design of a foldable structure is of paramount importance. Summary of the Invention

[0006] The purpose of this invention is to provide a foldable structure for portable solar cells to solve the aforementioned problems. This invention utilizes origami mechanics to design crease distribution patterns, obtaining foldable units for the foldable structure. Based on verifying its excellent folding characteristics, and fully considering manufacturability, the geometric parameters of the structure are designed and expanded to increase the number of panels and improve the working area while almost maintaining the folded projected area. This invention provides a new solution to the problem of the inability to quickly store portable solar cells with large folding ratios. Furthermore, its modular design enhances its applicability, making it significant for the field of portable solar cells.

[0007] The objective of this invention is achieved through the following technical solution:

[0008] A modular solar cell structure with a large refractive index and easy deployment comprises twenty solar panel modules. The solar cell structure is divided into an upper unit and a lower unit. Each solar panel module in the upper and lower units is detachably connected by flexible hinges. The upper and lower units are axially symmetrical. Each upper and lower unit consists of two rows and five columns of solar panel modules. The flexible hinges between the first row of solar panel modules in the upper unit are arranged alternately with wide and narrow flexible hinges. The flexible hinges between the second row of solar panel modules in the upper unit are arranged alternately with narrow and wide flexible hinges. The flexible hinges between the first row of solar panel modules in the lower unit are arranged alternately with narrow and wide flexible hinges. The flexible hinges between the second row of solar panel modules in the lower unit are arranged alternately with wide and narrow flexible hinges. The tilt direction of each column of solar panel modules in the upper and lower units is different. The upper and lower units are interconnected by three flexible hinges of equal width and the widest possible width.

[0009] Furthermore, the solar panel modules are, in sequence, panel one, panel two, panel three, panel four, panel five, panel six, panel seven, panel eight, panel nine, panel ten, panel eleven, panel twelve, panel thirteen, panel fourteen, panel fifteen, panel sixteen, panel seventeen, panel eighteen, panel nineteen, and panel twentieth;

[0010] There are 29 flexible hinges, namely hinge 1, hinge 2, hinge 3, hinge 4, hinge 5, hinge 6, hinge 7, hinge 8, hinge 9, hinge 10, hinge 11, hinge 12, hinge 13, hinge 14, hinge 15, hinge 16, hinge 17, hinge 18, hinge 19, hinge 20, hinge 21, hinge 22, hinge 23, hinge 24, hinge 25, hinge 26, hinge 27, hinge 28, and hinge 29.

[0011] Plate 1 and Plate 2 are adjacent in the x-direction and connected by hinge fourteen; Plate 2 and Plate 3 are adjacent in the x-direction and connected by hinge fifteen; Plate 3 and Plate 4 are adjacent in the x-direction and connected by hinge sixteen; Plate 4 and Plate 5 are adjacent in the x-direction and connected by hinge seventeen; Plate 6 and Plate 7 are adjacent in the x-direction and connected by hinge eighteen; Plate 7 and Plate 8 are adjacent in the x-direction and connected by hinge nineteen; Plate 8 and Plate 9 are adjacent in the x-direction and connected by hinge twentieth; Plate 9 and Plate 10 are adjacent in the x-direction and connected by hinge twenty-one; Plate 11 and Plate 12 are adjacent in the x-direction... Plates 12 and 13 are adjacent in the x-direction and connected by hinge 22; Plates 13 and 14 are adjacent in the x-direction and connected by hinge 24; Plates 14 and 15 are adjacent in the x-direction and connected by hinge 25; Plates 16 and 17 are adjacent in the x-direction and connected by hinge 26; Plates 17 and 18 are adjacent in the x-direction and connected by hinge 27; Plates 18 and 19 are adjacent in the x-direction and connected by hinge 28; Plates 19 and 20 are adjacent in the x-direction and connected by hinge 29.

[0012] Plate 1 and Plate 6 are adjacent in the y-direction and connected by hinge 1; Plate 2 and Plate 7 are adjacent in the y-direction and connected by hinge 2; Plate 3 and Plate 8 are adjacent in the y-direction and connected by hinge 3; Plate 4 and Plate 9 are adjacent in the y-direction and connected by hinge 4; Plate 5 and Plate 10 are adjacent in the y-direction and connected by hinge 5; Plate 6 and Plate 11 are adjacent in the y-direction and connected by hinge 6; Plate 8 and Plate 13 are adjacent in the y-direction and connected by hinge 7; Plate 10 and Plate 15 are adjacent in the y-direction and connected by hinge 8; Plate 11 and Plate 16 are adjacent in the y-direction and connected by hinge 9; Plate 12 and Plate 17 are adjacent in the y-direction and connected by hinge 10; Plate 13 and Plate 18 are adjacent in the y-direction and connected by hinge 11; Plate 14 and Plate 19 are adjacent in the y-direction and connected by hinge 12; Plate 15 and Plate 20 are adjacent in the y-direction and connected by hinge 13.

[0013] The axes of hinges 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, and 13 are parallel to each other; the axes of hinges 14, 15, 16, 17, 22, 23, 24, and 25 are parallel to each other; and the axes of hinges 18, 19, 20, 21, 26, 27, 28, and 29 are parallel to each other.

[0014] Plates 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, and hinges 1, 2, 3, 4, 5, 14, 15, 16, 17, 18, 19, 20, and 21 constitute the upper unit of the solar cell structure. Plates 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, and 29 constitute the lower unit of the solar cell structure. The upper and lower units are symmetrical about the axis of hinges 6, 7, and 8.

[0015] Furthermore, the solar panel module consists of two layers: an upper layer is a solar panel, and a lower layer is a parallelogram substrate. All parallelogram substrates have the same shape and size and the same thickness.

[0016] Furthermore, based on the different mating surfaces of the parallelogram substrate and the solar panel, the solar panel modules are divided into two categories. Panel 1, Panel 2, Panel 3, Panel 4, Panel 5, Panel 11, Panel 12, Panel 13, Panel 14, and Panel 15 are of the same type of solar panel module, while Panel 6, Panel 7, Panel 8, Panel 9, Panel 10, Panel 16, Panel 17, Panel 18, Panel 19, and Panel 20 are of the same type of solar panel module.

[0017] Furthermore, each side of the parallelogram substrate is provided with two connection holes, and the flexible hinge is composed of a hinge body and a connection plug; when the battery panel module is connected to the flexible hinge, the connection plug and the connection hole form a connection fit.

[0018] Furthermore, by changing the geometric parameters of the parallelogram substrate's external dimensions and interior angles in the solar panel module, solar cell structures with different refractive indexes are obtained. The acute interior angle of the parallelogram substrate is always 86°.

[0019] Furthermore, during the folding process, the flexible hinges correspond to two types of creases according to the folding direction. Hinges 1, 2, 3, 4, 5, 9, 10, 11, 12, 13, 14, 16, 19, 21, 23, 25, 26, and 28 correspond to valley creases, while hinges 6, 7, 8, 15, 17, 18, 20, 22, 24, 27, and 29 correspond to mountain creases.

[0020] There is a gap between the battery panel modules connected by flexible hinges, and the gap is the working width of the flexible hinge; let the thickness of the battery panel module be T, the thickness of the flexible hinge be t, and the condition for the working width of the flexible hinge to be satisfied:

[0021] The working width of hinges 1, 2, 3, 4, 5, 9, 10, 11, 12, 13, 15, 17, 18, 20, 22, 24, 27, and 29 is greater than or equal to 2 (T+t); the working width of hinges 14, 16, 19, 21, 23, 25, 26, and 28 is greater than or equal to 4 (T+t); and the working width of hinges 6, 7, and 8 is greater than or equal to 16 (T+t).

[0022] Furthermore, the solar cell structure adopts a step-by-step folding method. The first fold folds the entire row of plates 1, 2, 3, 4, and 5 into the row containing plates 6, 7, 8, 9, and 10, while simultaneously folding the entire row of plates 16, 17, 18, 19, and 20 into the row containing plates 11, 12, 13, 14, and 15, forming a two-row structure in the projection direction. The second fold can be formed by a single fold through its own structural characteristics. The unfolding steps of the solar cell structure are the reverse of the folding steps.

[0023] Furthermore, solar cell structures can be expanded infinitely by adding rows of panels at both the top and bottom, resulting in a greater aspect ratio.

[0024] Compared with the prior art, the beneficial effects of the technical solution of the present invention are:

[0025] 1. The solar cell structure of the present invention has a large folding-to-displacement ratio. When folded, the projected area is small, which is convenient for storage, transportation or carrying. When unfolded, the surface area is large, which can be completely flattened and the working power is large.

[0026] 2. The solar cell structure of the present invention adopts a paper-folding mechanism design method, which has fewer unfolding steps and excellent unfolding effect. It can be quickly stored with both hands when folding.

[0027] 3. The parallelogram substrate of the solar cell structure of the present invention has uniform shape and specifications, making it suitable for mass production.

[0028] 4. The solar cell structure of the present invention adopts a modular design, which is suitable for mass production and packaging.

[0029] 5. The solar cell structure of the present invention uses a flexible hinge connection, which is less sensitive to manufacturing errors and easier to process.

[0030] 6. The solar cell structure of the present invention can select different external dimensions of the solar panel modules according to the operating conditions to meet different requirements for the overall size.

[0031] 7. The solar cell structure of the present invention can select different numbers of solar panel modules according to the working conditions, and can be quickly assembled to meet different requirements for folding ratio.

[0032] 8. The solar cell structure of the present invention has multiple working configurations in actual use to meet different application scenarios. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the projected structure of the solar cell in this embodiment.

[0034] Figure 2 This is a schematic diagram of the thick plate origami principle used in this invention.

[0035] Figure 3 This is a schematic diagram of the battery panel module in this invention.

[0036] Figure 4-1 This is a bottom-view projection of Plate Six. Figure 4-2 This is a schematic diagram of hinge one. Figure 4-3 This is a bottom view projection of the partial assembly of Plate 6, Plate 1, and Hinge 1.

[0037] Figure 5-1 This is a projection of the parallelogram substrate with an interior acute angle of 86° and the structure after folding. Figure 5-2 This is a projection of a parallelogram substrate with an interior acute angle of 60° and the structure after folding.

[0038] Figures 6-1 to 6-5 This is a schematic diagram of the solar cell structure and its folding process in this embodiment, wherein... Figure 6-1 This is a schematic diagram of a solar cell structure. Figure 6-2 This is a structural diagram of the first step of the folding process. Figure 6-3 This is a schematic diagram of the structure after the first step of folding. Figure 6-4 This is a structural diagram of the second step of the folding process. Figure 6-5 This is a schematic diagram of the final folded structure.

[0039] Figure 7 This is a schematic diagram of an extended method of the present invention.

[0040] Reference numerals: 1-Battery panel module, 11-Parallelogram substrate, 12-Solar panel, 13-Connection socket; 2-Flexible hinge, 21-Hinge body, 22-Connection plug;

[0041] P1 - Board 1, P2 - Board 2, P3 - Board 3, P4 - Board 4, P5 - Board 5, P6 - Board 6, P7 - Board 7, P8 - Board 8, P9 - Board 9, P10 - Board 10, P11 - Board 11, P12 - Board 12, P13 - Board 13, P14 - Board 14, P15 - Board 15, P16 - Board 16, P17 - Board 17, P18 - Board 18, P19 - Board 19, P20 - Board 20;

[0042] X1 - Hinge 1, X2 - Hinge 2, X3 - Hinge 3, X4 - Hinge 4, X5 - Hinge 5, X6 - Hinge 6, X7 - Hinge 7, X8 - Hinge 8, X9 - Hinge 9, X10 - Hinge 10, X11 - Hinge 11, X12 - Hinge 12, X13 - Hinge 13, Y14 - Hinge 14, Y15 - Hinge 15, Y16 - Hinge 16, Y17 - Hinge 17, Y18 - Hinge 18, Y19 - Hinge 19, Y20 - Hinge 20, Y21 - Hinge 21, Y22 - Hinge 22, Y23 - Hinge 23, Y24 - Hinge 24, Y25 - Hinge 25, Y26 - Hinge 26, Y27 - Hinge 27, Y28 - Hinge 28, Y29 - Hinge 29. Detailed Implementation

[0043] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only for explaining the present invention and are not intended to limit the present invention.

[0044] See Figure 1 As shown, this example provides a modular solar cell structure with an easy-to-deploy and high refractive index, including twenty solar panel modules 1 and twenty-nine flexible hinges 2; the solar panel modules 1 are, in order, panel one P1, panel two P2, panel three P3, panel four P4, panel five P5, panel six P6, panel seven P7, panel eight P8, panel nine P9, panel ten P10, panel eleven P11, panel twelve P12, panel thirteen P13, panel fourteen P14, panel fifteen P15, panel sixteen P16, panel seventeen P17, panel eighteen P18, panel nineteen P19, and panel twentieth P20; the flexible hinges 2 are, in order, hinge one X1, hinge two X2, and hinge... 3X3, 4X4, 5X5, 6X6, 7X7, 8X8, 9X9, 10X10, 11X11, 12X12, 13X13, 14Y14, 15Y15, 16Y16, 17Y17, 18Y18, 19Y19, 20Y20, 21Y21, 22Y22, 23Y23, 24Y24, 25Y25, 26Y26, 27Y27, 28Y28, 29Y29.

[0045] Plate 1 P1 and Plate 2 P2 are adjacent in the x-direction and connected by hinge 14 Y14; Plate 2 P2 and Plate 3 P3 are adjacent in the x-direction and connected by hinge 15 Y15; Plate 3 P3 and Plate 4 P4 are adjacent in the x-direction and connected by hinge 16 Y16; Plate 4 P4 and Plate 5 P5 are adjacent in the x-direction and connected by hinge 17 Y17; Plate 6 P6 and Plate 7 P7 are adjacent in the x-direction and connected by hinge 18 Y18; Plate 7 P7 and Plate 8 P8 are adjacent in the x-direction and connected by hinge 19 Y19; Plate 8 P8 and Plate 9 P9 are adjacent in the x-direction and connected by hinge 20 Y20; Plate 9 P9 and Plate 10 P10 are adjacent in the x-direction and connected by hinge 21 Y21; Plate 11 P11 and Plate 12 P12 are adjacent in the x-direction... The plates are adjacent and connected by hinge 22 Y22. Plate 12 P12 and Plate 13 P13 are adjacent in the x direction and connected by hinge 23 Y23. Plate 13 P13 and Plate 14 P14 are adjacent in the x direction and connected by hinge 24 Y24. Plate 14 P14 and Plate 15 P15 are adjacent in the x direction and connected by hinge 25 Y25. Plate 16 P16 and Plate 17 P17 are adjacent in the x direction and connected by hinge 26 Y26. Plate 17 P17 and Plate 18 P18 are adjacent in the x direction and connected by hinge 27 Y27. Plate 18 P18 and Plate 19 P19 are adjacent in the x direction and connected by hinge 28 Y28. Plate 19 P19 and Plate 20 P20 are adjacent in the x direction and connected by hinge 29 Y29.

[0046] Plate 1 P1 and Plate 6 P6 are adjacent in the y-direction and connected by hinge 1 X1; Plate 2 P2 and Plate 7 P7 are adjacent in the y-direction and connected by hinge 2 X2; Plate 3 P3 and Plate 8 P8 are adjacent in the y-direction and connected by hinge 3 X3; Plate 4 P4 and Plate 9 P9 are adjacent in the y-direction and connected by hinge 4 X4; Plate 5 P5 and Plate 10 P10 are adjacent in the y-direction and connected by hinge 5 X5; Plate 6 P6 and Plate 11 P11 are adjacent in the y-direction and connected by hinge 6 X6; Plate 8 P8 and Plate 13 P13 are adjacent in the y-direction and connected by hinge 7 X7. Plate 10 P10 and Plate 15 P15 are adjacent in the y-direction and connected by hinge 8 X8. Plate 11 P11 and Plate 16 P16 are adjacent in the y-direction and connected by hinge 9 X9. Plate 12 P12 and Plate 17 P17 are adjacent in the y-direction and connected by hinge 10 X10. Plate 13 P13 and Plate 18 P18 are adjacent in the y-direction and connected by hinge 11 X11. Plate 14 P14 and Plate 19 P19 are adjacent in the y-direction and connected by hinge 12 X12. Plate 15 P15 and Plate 20 P20 are adjacent in the y-direction and connected by hinge 13 X13.

[0047] The axes of hinges X1, X2, X3, X4, X5, X6, X7, X8, X9, X10, X11, X12, and X13 are parallel to each other. The axes of hinges Y14, Y15, Y16, Y17, Y22, Y23, Y24, and Y25 are parallel to each other. The axes of hinges Y18, Y19, Y20, Y21, Y26, Y27, Y28, and Y29 are parallel to each other.

[0048] Plate 1 P1, Plate 2 P2, Plate 3 P3, Plate 4 P4, Plate 5 P5, Plate 6 P6, Plate 7 P7, Plate 8 P8, Plate 9 P9, Plate 10 P10, Hinge 1 X1, Hinge 2 X2, Hinge 3 X3, Hinge 4 X4, Hinge 5 X5, Hinge 14 Y14, Hinge 15 Y15, Hinge 16 Y16, Hinge 17 Y17, Hinge 18 Y18, Hinge 19 Y19, Hinge 20 Y20, Hinge 21 Y21, the upper unit constituting the solar cell structure, Plate 11 P11, Plate 12 P12, Plate 13 P13, Plate 14 P14, Plate 15 P1 5. Plates 16 (P16), 17 (P17), 18 (P18), 19 (P19), 20 (P20), hinges 9 (X9), 10 (X10), 11 (X11), 12 (X12), 13 (X13), 22 (Y22), 23 (Y23), 24 (Y24), 25 (Y25), 26 (Y26), 27 (Y27), 28 (Y28), and 29 (Y29) constitute the lower unit of the solar cell structure; the upper unit and the lower unit are symmetrical about the axis of hinges 6 (X6), 7 (X7), and 8 (X8).

[0049] When connecting the solar panel modules 1, the flexible hinge 2 creates a certain distance between the modules; this distance is called the working width of the flexible hinge 2. Let the thickness of the solar panel modules be T, and the thickness of the flexible hinge be t. The working width of the flexible hinge 2 can be obtained as follows: Hinge 1 X1, Hinge 2 X2, Hinge 3 X3, Hinge 4 X4, Hinge 5 X5, Hinge 9 X9, Hinge 10 X10, Hinge 11 X11, Hinge 12 X12, Hinge 13 X13, Hinge 15 Y15, Hinge 17 Y17, Hinge 18 Y1 8. The working width of hinges Y20, Y22, Y24, Y27, and Y29 is not less than 2 (T+t); the working width of hinges Y14, Y16, Y19, Y21, Y23, Y25, Y26, and Y28 is not less than 4 (T+t); and the working width of hinges X6, X7, and X8 is not less than 16 (T+t).

[0050] See Figure 2 As shown, the folding principle of this example is to separate two plates that could not originally achieve valley line folding, and use a film to cover the bottom of the two plates in the middle. During the folding process, the width of the film provides space to accommodate the thickness of the plates, thereby achieving valley line folding.

[0051] See Figure 3 As shown, the solar panel module 1 consists of two layers: a lower layer of parallelogram substrate 11 and an upper layer of solar panel 12. All parallelogram substrates 11 have the same shape, size, and thickness. Based on the different mating surfaces of the parallelogram substrate 11 and the solar panel 12, two types of solar panel modules can be distinguished, such as... Figure 1 Board 1P1, Board 2P2, Board 3P3, Board 4P4, Board 5P5, Board 11P11, Board 12P12, Board 13P13, Board 14P14, and Board 15P15 are the same type of solar panel module. Board 6P6, Board 7P7, Board 8P8, Board 9P9, Board 10P10, Board 16P16, Board 17P17, Board 18P18, Board 19P19, and Board 20P20 are the same type of solar panel module.

[0052] See Figure 4-1 As shown, each side of the parallelogram substrate 11 has two connection holes 13; see also Figure 4-2 As shown, the flexible hinge 2 consists of a hinge body 21 and a connector 22; see also Figure 4-3 As shown, when the solar panel module 1 is connected to the flexible hinge 2, the connector 22 and the connector socket 13 form a connection.

[0053] See Figure 5-1 and Figure 5-2As shown, by changing the geometric parameters of the parallelogram substrate's external dimensions and interior angles in the solar panel module, solar cell structures with different refractive inflection ratios can be obtained; for a given area of ​​0.029m²... 2 For parallelogram-shaped substrates with consistent thickness, the area when fully unfolded is the same. However, the angle of the inner acute angle will cause the area to differ after folding. Figure 5-1 The parallelogram substrate with an 86° acute interior angle shown has a folded projected area of ​​0.0349 for the solar cell structure. Figure 5-2 The parallelogram substrate with a 60° acute inner angle shown has a folded projected area of ​​0.0654 for the solar cell structure, which is 0.53 times the folding ratio shown in the figure above. Therefore, the larger the acute inner angle, the larger the folding ratio. However, it should be noted that the acute inner angle should not exceed 90°. In this example, the acute inner angle of the parallelogram substrate used is 86°.

[0054] See Figures 6-1 to 6-5 As shown, the solar cell structure adopts a step-by-step folding method, as... Figure 6-1 and 6-2 As shown, the first fold involves folding the entire row of plates P1, P2, P3, P4, and P5 to the row containing plates P6, P7, P8, P9, and P10. Simultaneously, the entire row of plates P16, P17, P18, P19, and P20 is folded to the row containing plates P11, P12, P13, P14, and P15, forming a two-row structure in the projection direction, as shown. Figure 6-3 As shown; Figure 6-4 As shown, the second fold can be formed by its own structural characteristics to achieve a one-step fold, ultimately resulting in... Figure 6-5 The fully folded state shown enables rapid storage of the solar cell structure; the unfolding steps of the solar cell structure are the reverse of the folding steps; as can be seen from the figure, the flexible hinges correspond to two types of creases according to the folding direction during the folding process: Hinge 1 X1, Hinge 2 X2, Hinge 3 X3, Hinge 4 X4, Hinge 5 X5, Hinge 9 X9, Hinge 10 X10, Hinge 11 X11, Hinge 12 X12, Hinge 13 X13, Hinge 14 X14, Hinge 15 X16... The following hinges correspond to valley creases: Y16 (hinge 6), Y19 (hinge 19), Y21 (hinge 21), Y23 (hinge 23), Y25 (hinge 25), Y26 (hinge 26), and Y28 (hinge 28). The following hinges correspond to mountain creases: X6 (hinge 6), X7 (hinge 7), X8 (hinge 8), Y15 (hinge 15), Y17 (hinge 17), Y18 (hinge 18), Y20 (hinge 20), Y22 (hinge 22), Y24 (hinge 24), Y27 (hinge 27), and Y29 (hinge 29).

[0055] See Figure 7As shown, the solar cell structure can be expanded by adding a row of panels at both ends in the y direction. In the figure, the x direction is defined as the horizontal direction and the y direction as the vertical direction. The number of columns of panels along the x direction is M, and the number of rows of panels along the y direction is 2N. The lowercase letters n and m are used as numbers to determine the specific number of rows and columns. At this time, the structure still has the characteristic of axis symmetry. The number of rows above the axis of symmetry along the positive x direction is row 1 to row N, and the number of rows above the axis of symmetry along the negative x direction is row -1 to row -N.

[0056] The creases above the axis of symmetry are distributed as follows: In the x-direction, when n is odd, the flexible hinge between the nth row and the (n+1)th row corresponds to a valley line; when n is even, the flexible hinge between the nth row and the (n+1)th row corresponds to a mountain line. In the y-direction, at the position of the 1st row, when n is odd, the flexible hinge between the mth column and the (m+1)th column corresponds to a mountain line; when m is even, the flexible hinge between the mth column and the (m+1)th column corresponds to a valley line. As the number of rows n increases, the valley line type corresponding to the flexible hinge in the same column alternates. The correspondence of the flexible hinges below the axis of symmetry is symmetrical to the correspondence of the flexible hinges above the axis of symmetry about the horizontal axis of symmetry.

[0057] Let T denote the thickness of the solar panel module, t denote the thickness of the flexible hinge, and H denote the working width of the flexible hinge. The constraint condition is: the working width of the connecting hinge at the horizontal axis of symmetry is not less than H. X0 =2N·(M-1)·(T+t), and the working width of other flexible hinges in the x-direction is not less than H. Xn =2(T+t); For the working width of the connecting hinge in the y-direction, taking the connecting hinge above the horizontal axis of symmetry as an example, when m is odd, the working width of the flexible hinge between the m-th column and the (m+1)-th column increases arithmetically from the 1st row to the Nth row; when m is even, the working width of the flexible hinge between the m-th column and the (m+1)-th column increases arithmetically from the Nth row to the 1st row. At this time, the maximum working width of the flexible hinge is not less than H. YN =2N·(T+t), minimum working width not less than H Y1 =2(T+t); This design method is similar to Figure 1 The structural design shown is consistent with the "N=2, M=5" case.

[0058] Figure 7 The given structure and Figure 1 The projected area of ​​the structure is consistent when it is fully folded. This method can achieve infinite expansion of the structure and obtain a larger fold-to-expansion ratio.

[0059] Finally, it should be noted that the above examples are only used to illustrate the calculation process of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing examples, those skilled in the art should understand that modifications can still be made to the calculation process described in the foregoing examples, or equivalent substitutions can be made to some of the parameters. Such modifications or substitutions do not cause the essence of the corresponding calculation method to deviate from the spirit and scope of the calculation method of the present invention.

[0060] This invention is not limited to the embodiments described above. The above description of specific embodiments is intended to illustrate and explain the technical solutions of this invention. The specific embodiments described above are merely illustrative and not restrictive. Without departing from the spirit and scope of the claims, those skilled in the art can make many specific modifications based on the teachings of this invention, and these modifications all fall within the scope of protection of this invention.

Claims

1. A modular solar cell structure with a large refractive index that is easy to deploy and retract, characterized in that, Composed of twenty solar panel modules, the solar cell structure is divided into an upper unit and a lower unit. Each solar panel module in the upper and lower units is detachably connected by flexible hinges. The upper and lower units are axially symmetrical. Each upper and lower unit consists of two rows and five columns of solar panel modules. The flexible hinges between the first row of solar panel modules in the upper unit are arranged alternately with wide and narrow flexible hinges. The flexible hinges between the second row of solar panel modules in the upper unit are arranged alternately with narrow and wide flexible hinges. The flexible hinges between the first row of solar panel modules in the lower unit are arranged alternately with narrow and wide flexible hinges. The flexible hinges between the second row of solar panel modules in the lower unit are arranged alternately with wide and narrow flexible hinges. The tilt direction of each column of solar panel modules in the upper and lower units is different. The upper and lower units are connected to each other by three flexible hinges of equal width and the widest possible width. The solar panel module consists of two layers: an upper solar panel and a lower parallelogram substrate. All parallelogram substrates have the same shape, size, and thickness. By changing the geometric parameters of the parallelogram substrate's outer dimensions and interior angles in the solar panel module, solar cell structures with different folding ratios can be obtained. The acute angles of the parallelogram substrate are all 86 degrees. ° .

2. The modular, high refractive index solar cell structure according to claim 1, characterized in that, The solar panel modules are, in sequence, panel one, panel two, panel three, panel four, panel five, panel six, panel seven, panel eight, panel nine, panel ten, panel eleven, panel twelve, panel thirteen, panel fourteen, panel fifteen, panel sixteen, panel seventeen, panel eighteen, panel nineteen, and panel twentieth; There are 29 flexible hinges, namely hinge 1, hinge 2, hinge 3, hinge 4, hinge 5, hinge 6, hinge 7, hinge 8, hinge 9, hinge 10, hinge 11, hinge 12, hinge 13, hinge 14, hinge 15, hinge 16, hinge 17, hinge 18, hinge 19, hinge 20, hinge 21, hinge 22, hinge 23, hinge 24, hinge 25, hinge 26, hinge 27, hinge 28, and hinge 29. Plate 1 and Plate 2 are adjacent in the x-direction and connected by hinge fourteen; Plate 2 and Plate 3 are adjacent in the x-direction and connected by hinge fifteen; Plate 3 and Plate 4 are adjacent in the x-direction and connected by hinge sixteen; Plate 4 and Plate 5 are adjacent in the x-direction and connected by hinge seventeen; Plate 6 and Plate 7 are adjacent in the x-direction and connected by hinge eighteen; Plate 7 and Plate 8 are adjacent in the x-direction and connected by hinge nineteen; Plate 8 and Plate 9 are adjacent in the x-direction and connected by hinge twentieth; Plate 9 and Plate 10 are adjacent in the x-direction and connected by hinge twenty-one; Plate 11 and Plate 12 are adjacent in the x-direction... Plates 12 and 13 are adjacent in the x-direction and connected by hinge 22; Plates 13 and 14 are adjacent in the x-direction and connected by hinge 24; Plates 14 and 15 are adjacent in the x-direction and connected by hinge 25; Plates 16 and 17 are adjacent in the x-direction and connected by hinge 26; Plates 17 and 18 are adjacent in the x-direction and connected by hinge 27; Plates 18 and 19 are adjacent in the x-direction and connected by hinge 28; Plates 19 and 20 are adjacent in the x-direction and connected by hinge 29. Plate 1 and Plate 6 are adjacent in the y-direction and connected by hinge 1; Plate 2 and Plate 7 are adjacent in the y-direction and connected by hinge 2; Plate 3 and Plate 8 are adjacent in the y-direction and connected by hinge 3; Plate 4 and Plate 9 are adjacent in the y-direction and connected by hinge 4; Plate 5 and Plate 10 are adjacent in the y-direction and connected by hinge 5; Plate 6 and Plate 11 are adjacent in the y-direction and connected by hinge 6; Plate 8 and Plate 13 are adjacent in the y-direction and connected by hinge 7; Plate 10 and Plate 15 are adjacent in the y-direction and connected by hinge 8; Plate 11 and Plate 16 are adjacent in the y-direction and connected by hinge 9; Plate 12 and Plate 17 are adjacent in the y-direction and connected by hinge 10; Plate 13 and Plate 18 are adjacent in the y-direction and connected by hinge 11; Plate 14 and Plate 19 are adjacent in the y-direction and connected by hinge 12; Plate 15 and Plate 20 are adjacent in the y-direction and connected by hinge 13. The axes of hinges 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, and 13 are parallel to each other; the axes of hinges 14, 15, 16, 17, 22, 23, 24, and 25 are parallel to each other; and the axes of hinges 18, 19, 20, 21, 26, 27, 28, and 29 are parallel to each other. The upper unit of the solar cell structure consists of plates 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, and hinges 1, 2, 3, 4, 5, 14, 15, 16, 17, 18, 19, 20, and 21. The lower unit of the solar cell structure consists of plates 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, and hinges 9, 10, 11, 12, 13, 22, 23, 24, 25, 26, 27, 28, and 29. The upper and lower units are symmetrical about the axis of hinges 6, 7, and 8.

3. The modular, high refractive index solar cell structure according to claim 1, characterized in that, Based on the different mating surfaces of the parallelogram substrate and the solar panel, the solar panel modules are divided into two categories. Panel 1, Panel 2, Panel 3, Panel 4, Panel 5, Panel 11, Panel 12, Panel 13, Panel 14, and Panel 15 are the same type of solar panel module, while Panel 6, Panel 7, Panel 8, Panel 9, Panel 10, Panel 16, Panel 17, Panel 18, Panel 19, and Panel 20 are the same type of solar panel module.

4. The modular, high refractive index solar cell structure according to claim 1, characterized in that, Each side of the parallelogram substrate is provided with two connection holes. The flexible hinge consists of a hinge body and a connection plug. When the battery panel module is connected to the flexible hinge, the connection plug and the connection hole form a connection fit.

5. The modular, high refractive index solar cell structure according to claim 2, characterized in that, The flexible hinges correspond to two types of creases according to the folding direction during the folding process. Hinges 1, 2, 3, 4, 5, 9, 10, 11, 12, 13, 14, 16, 19, 21, 23, 25, 26, and 28 correspond to valley creases, while hinges 6, 7, 8, 15, 17, 18, 20, 22, 24, 27, and 29 correspond to mountain creases. There is a gap between the battery panel modules connected by flexible hinges, and the gap is the working width of the flexible hinge; let the thickness of the battery panel module be T, the thickness of the flexible hinge be t, and the condition for the working width of the flexible hinge to be satisfied: The working width of hinges 1, 2, 3, 4, 5, 9, 10, 11, 12, 13, 15, 17, 18, 20, 22, 24, 27, and 29 is greater than or equal to 2 (T+t). The working width of hinges 14, 16, 19, 21, 23, 25, 26, and 28 is greater than or equal to 4 (T+t). The working width of hinges 6, 7, and 8 is greater than or equal to 16 (T+t).

6. The modular solar cell structure with a large refractive index and easy expansion and contraction as described in claim 2, characterized in that, The solar cell structure adopts a step-by-step folding method. The first step of folding involves folding the entire row of plates 1, 2, 3, 4, and 5 into the row containing plates 6, 7, 8, 9, and 10, while simultaneously folding the entire row of plates 16, 17, 18, 19, and 20 into the row containing plates 11, 12, 13, 14, and 15, forming a two-row structure in the projection direction. The second step of folding can be achieved by a single folding step through its own structural characteristics. The unfolding steps of the solar cell structure are the reverse of the folding steps.

7. The modular, high refractive index solar cell structure according to claim 1, characterized in that, Solar cell structures can be expanded infinitely by adding rows of panels at both the top and bottom, resulting in a greater tear-to-surface ratio.

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