Polygonal scroll type solar panel and application thereof

Abstract

The invention discloses a polygonal scroll type solar panel and application thereof, the polygonal scroll type solar panel comprises N groups of battery piece units, N is greater than or equal to 3 and is an integer, the N groups of battery piece units are sequentially arranged along a rolling direction, each group of battery piece units comprises one or more electrically connected battery pieces, the width of the ith group of battery piece units is Wi, and Wi = Wi-1 + delta W is satisfied, wherein i is equal to 2, 3,... N, and delta W is a preset width difference, so that the widths of the groups are gradually increased in sequence, namely W1lt; w < 2lt >; ... lt; wN, each group of battery piece units are connected through a flexible connecting structure, when the whole winding body is wound, each group of battery piece units expand outwards layer by layer in the radial direction due to sequential increasing of the width, so that the outer contour of the winding body is in a K-sided shape, and K is the number of each group of battery piece units; according to the invention, the N groups of battery piece units of which the widths are gradually increased are matched with the flexible connection structure, and a K-sided cylinder is formed during rolling, so that collaborative optimization of compact storage, stable stacking and large unfolding area is realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of solar photovoltaic power generation, in particular to a polygonal reel type solar panel and application thereof. BACKGROUND

[0002] The portable solar panels on the market currently mainly adopt two structural forms, one is a book type folding structure, and the other is a cylindrical reel type structure.

[0003] The book type folding solar panel is usually formed by connecting rigid or semi-rigid panels through hinges, although a larger power generation area can be formed after unfolding, but its storage volume is large, the weight is heavy, the unfolding area is limited, and the folding times are limited, fatigue fracture is prone to occur at the hinge; in addition, its storage form is mainly a cuboid, which is inconvenient to stack and has low space utilization; the cylindrical reel type solar panel has good portability and can be wound into a cylinder, but its winding is a circular cross section, which is easy to roll on a plane and has poor stability; at the same time, since the widths of each layer are the same, the winding space cannot be fully utilized to achieve a larger unfolding area, and it is difficult to tightly splice multiple cylinders, which limits the modular expansion application.

[0004] Therefore, there is an urgent need for a new type of portable solar panel, which can realize a larger unfolding area, a more stable storage form, a higher space utilization, and support flexible customization and modular splicing under the premise of ensuring lightweight and high portability. SUMMARY

[0005] The present application aims to overcome the shortcomings of the prior art and provide a polygonal reel type solar panel and application thereof, which has the advantages of small storage volume, large unfolding area, stable structure after winding, and lightweight and portability.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical scheme: A polygonal reel type solar panel, comprising: N groups of cell piece units, wherein N>=3 and N is an integer; The N groups of cell piece units are arranged in sequence along the winding direction, and each group of cell piece units comprises one or more electrically connected cell pieces; The width of the i-th group of cell piece units is Wi, which satisfies Wi=Wi-1+ΔW, wherein i=2, 3, …N, and ΔW is a predetermined width difference, so that the widths of each group are sequentially increased, i.e. W1<W2<…<WN; Each group of cell piece units is connected through a flexible connection structure; When the whole is wound, each group of cell piece units is expanded layer by layer in the radial direction due to the sequentially increasing widths, so that the outer contour K of the winding body is polygonal, and K is the number of cell pieces in each group of cell piece units.

[0007] Further, the number of battery pieces contained in each group of battery piece units is the same, which improves overall power generation efficiency and system stability.

[0008] Further, the battery piece units are packaged with lightweight packaging materials to reduce overall weight and improve portability.

[0009] Further, the flexible connection structure is a flexible printed circuit, which ensures electrical connectivity and mechanical reliability during winding.

[0010] Further, the cross section of the K-sided polygonal cylinder is a regular K-sided polygon, and each side is a plane, facilitating the splicing between multiple same-specification reel-type portable solar panels.

[0011] Further, K is 5, 6 or 8, wherein: When K=5, the winding body has a smaller circumscribed circle diameter; When K=6, the winding body has structural stability, and its side is suitable for multi-module stacking; When K=8, the winding body corresponds to a larger unfolded area.

[0012] Further, the application of the reel-type solar panel includes outdoor portable charging, car sunshade charging, tent charging or emergency power supply.

[0013] Compared with the prior art, the beneficial effects of the present application are as follows: 1. The present application uses N groups of battery piece units with increasing widths in cooperation with a flexible connection structure, and electrically connects and mechanically couples each group through the flexible connection structure. During the overall winding process, due to the smaller width of the inner unit and the gradual widening of the outer layer, a stacked shape is naturally formed in the radial direction, thereby adaptively constructing a K-sided polygonal cylinder structure. This not only significantly improves the effective power generation area in a unit storage volume, but also has static stability with any side that can be stably placed and is not easy to roll due to its polygonal profile. Compared with the prior art, the present application realizes the comprehensive performance improvement of small volume storage, large area power generation, static stable placement and modular splicing. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 The present application is a planar structure diagram for example 4; Figure 2 The present application is a cross-sectional structure diagram after winding for example 4; Figure 3 The present application is a planar structure diagram for example 1; Figure 4 The present application is a planar structure diagram for example 2; Figure 5 The present application is a planar structure diagram for example 3.

[0015] Explanation of reference signs: 1, battery piece unit. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below in conjunction with the drawings of the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the described embodiments of the present application, all other embodiments obtained by a person of ordinary skill in the art without any inventive effort fall within the scope of protection of the present application.

[0017] The following embodiments are used to illustrate the present application, but cannot be used to limit the protection scope of the present application. The conditions in the embodiments can be further adjusted according to specific conditions, and simple improvements to the method of the present application under the concept of the present application all fall within the scope of protection of the present application.

[0018] Reference Figures 1-3 A polygonal reel-type solar panel comprises: N groups of battery piece units 1, where N≥3 and N is an integer; The N groups of battery piece units 1 are arranged in sequence along the winding direction, and each group of battery piece units comprises one or more battery pieces electrically connected; The width of the i-th group of battery piece units 1 is Wi, which satisfies Wi=Wi-1+ΔW, where i=2, 3, …N, and ΔW is a preset width difference, so that the widths of the groups are sequentially increased, i.e., W1<W2<…<WN; The groups of battery piece units 1 are connected through flexible connection structures, the flexible connection structures are electrically connected through flexible printed circuits, the flexible printed circuits are embedded in a flexible encapsulation layer to ensure that the flexible printed circuits are not broken during winding, and the entire structure uses a polyester film as a substrate, an ethylene-vinyl acetate copolymer as an encapsulation adhesive film, and a glass fiber reinforced film on the outer layer to achieve lightweight and weather resistance.

[0019] When the entire winding is performed, the groups of battery piece units 1 expand layer by layer in the radial direction due to the sequentially increased widths, so that the outer contour K of the winding body is polygonal, and K is the number of battery pieces in the groups of battery piece units 1.

[0020] Embodiment 1: Reference Figure 3 The present embodiment provides a pentagonal reel-type solar panel comprising 5 groups of battery piece units 1, i.e., N=5 and K=5, which correspond to form a pentagonal winding shape, and each group of battery piece units 1 comprises 5 pieces of flexible solar battery pieces connected in series, and the total number of battery pieces is 25 pieces. Each group of battery piece units 1 is arranged in sequence along the winding direction. The first group has a width W1 of 50 mm, and the preset width difference AW is 10 mm. Therefore, the widths of each group are: W1 = 50 mm, W2 = 60 mm, W3 = 70 mm, W4 = 80 mm, and W5 = 90 mm. When the whole is wound, since the widths of each group increase in sequence, the inner layer units are wrapped by the outer layer and gradually expand outward, finally forming a cylinder with a regular pentagonal cross section. Each side of the pentagon is formed by the outer edge of a corresponding group of battery piece units 1. Since the pentagon has a small circumscribed circle diameter, it is suitable for scenarios that require compact storage, such as outdoor backpacking or emergency rescue equipment.

[0021] Embodiment 2: Referring to Figure 4 This embodiment provides a hexagonal reel-type solar panel, which includes 6 groups of battery piece units 1, i.e., N = 6 and K = 6, corresponding to a hexagonal winding form. Each group of battery piece units 1 contains 6 flexible solar battery pieces connected in series, and the total number of battery pieces is 36. Each group of battery piece units 1 is arranged in sequence along the winding direction. The first group has a width W1 of 50 mm, and the preset width difference AW is 10 mm. Therefore, the widths of each group are: W1 = 50 mm, W2 = 60 mm, W3 = 70 mm, W4 = 80 mm, W5 = 90 mm, and W6 = 100 mm.

[0022] When the whole is wound, since the widths of each group increase in sequence, the inner layer units are wrapped by the outer layer and gradually expand outward, finally forming a cylinder with a regular hexagonal cross section. Each side of the hexagon is formed by the outer edge of a corresponding group of battery piece units 1.

[0023] Since the hexagon has good structural stability, it is suitable for scenarios that require modular deployment, such as setting up a temporary tent system or a multi-module spliced emergency power station.

[0024] Embodiment 3: Referring to Figure 5 This embodiment provides an octagonal reel-type solar panel, which includes 8 groups of battery piece units 1, i.e., N = 8 and K = 8, corresponding to an octagonal winding form. Each group of battery piece units 1 contains 8 flexible solar battery pieces connected in series, and the total number of battery pieces is 64. Each group of battery piece units 1 is arranged in sequence along the winding direction. The first group has a width W1 of 50 mm, and the preset width difference AW is 10 mm. Therefore, the widths of each group are: W1 = 50 mm, W2 = 60 mm, W3 = 70 mm, W4 = 80 mm, W5=90mm, W6=100mm, W7=110mm, W8=120mm; When the whole is rolled up, due to the increasing width of each group in turn, the inner layer unit is wrapped by the outer layer and gradually expanded outward, finally forming a cylinder with a regular octagonal cross section. Each side of the octagon is composed of the outer edge of the corresponding group of battery cell units 1.

[0025] Due to the large unfolded area of the octagon at the same winding radius, it is suitable for scenarios that require efficient power generation, such as large awning systems or long-term camp power supply.

[0026] Embodiment 4: Reference Figures 1-2 This embodiment provides another hexagonal spool-type solar panel, which includes 4 groups of battery cell units 1, i.e. N=4, K=6, corresponding to a hexagonal rolled shape, each group of battery cell units 1 contains 6 pieces of flexible solar cell in series, and the total number of battery cells is 24 pieces. Each group is arranged in turn along the rolling direction and electrically connected by a flexible printed circuit.

[0027] The width of the i-th group of battery cell units 1 is Wi, which satisfies the geometric progression Wi=(Wi-1) x T, where i=2, 3, …N, and T is a predetermined specific ratio; Each group of battery cell units 1 is arranged in turn along the rolling direction, the width of the first group W1 is 50mm, and the predetermined specific ratio common ratio T=1.2, so the width of each group is: W1=50mm, W2=60mm, W3=72mm, W4=86.4mm, W5=103.68mm; When the whole is rolled up, due to the increasing width of each group in turn, the inner layer unit is wrapped by the outer layer and gradually expanded outward, finally forming a cylinder with a regular octagonal cross section. Each side of the octagon is composed of the outer edge of the corresponding group of battery cell units 1.

[0028] It should be noted that in this paper, relationship terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between the entities or operations. Moreover, the terms "include", "contain" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment.

[0029] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention.

Claims

1. A polygonal roll-up solar panel, characterized in that, include: N groups of battery cell units (1), where N≥3 and N is an integer; N groups of solar cell units (1) are arranged sequentially along the winding direction, and each group of solar cell units includes one or more electrically connected solar cells; The width of the i-th group of battery cell units (1) is Wi, which satisfies Wi = Wi-1 + ΔW, where i = 2, 3, ... N, and ΔW is a preset width difference that makes the width of each group increase sequentially, i.e., W1 <W2<…<WN; Each group of battery cell units (1) is connected by a flexible connection structure; When the whole is wound up, each group of battery cell units (1) expands outward layer by layer in the radial direction due to the increasing width, so that the outer contour of the wound body is K-sided, where K is the number of battery cells in each group of battery cell units (1).

2. The polygonal roll-type solar panel according to claim 1, characterized in that, Each group of battery cell units (1) contains the same number of battery cells.

3. The polygonal roll-type solar panel according to claim 1, characterized in that, The battery cell unit (1) is encapsulated using lightweight encapsulation materials.

4. The polygonal roll-type solar panel according to claim 1, characterized in that, The flexible connection structure is a flexible printed circuit.

5. A polygonal roll-type solar panel according to claim 1, characterized in that, The cross-section of the K-sided prism is a regular K-sided shape, and all its lateral faces are planes.

6. A polygonal roll-type solar panel according to claim 1 or 5, characterized in that... K is 5, 6, or 8, where: When K=5, the winding body has a smaller circumscribed circle diameter; When K=6, the winding body has structural stability and its sides are suitable for stacking multiple modules; When K=8, the rolled-up body corresponds to a larger unfolded area.

7. The application of a roll-up solar panel, employing a polygonal roll-up solar panel as described in any one of claims 1 to 5, characterized in that, Applications include portable outdoor charging, car sunshade charging, canopy charging, or emergency power.

Images