Flexible photovoltaic module unit and splicable flexible photovoltaic module

Abstract

The utility model discloses a flexible photovoltaic assembly unit and a splicable flexible photovoltaic assembly, and belongs to the technical field of solar assemblies, the flexible photovoltaic assembly unit comprises a packaging body, a twisted pair cable and a protection buckle; the packaging body comprises a flexible front plate, a front packaging adhesive film, a battery string, a rear packaging adhesive film and a flexible rear plate which are sequentially glued and packaged from top to bottom; the flexible front plate and the flexible rear plate are both made of high-molecular polymer materials. The number of the battery strings is at least one, and the battery strings lead out current through the twisted-pair cable; and the protection buckle is fixedly connected to the position where the twisted pair cable is led out of the packaging body. The tail ends of the twisted-pair cables are welded on the integrated junction boxes, the adjacent integrated junction boxes are welded through the single-strand cables, and a plurality of flexible photovoltaic module units are spliced into the splicing type flexible photovoltaic module. The flexible photovoltaic module unit provided by the utility model has good profiling capability, and can be spliced and installed according to different installation occasions, thereby widening the installation range of the photovoltaic module.

Description

Technical Field

[0001] The utility model belongs to the technical field of solar energy components, and in particular relates to a flexible photovoltaic component unit and a splicable flexible photovoltaic component. Background Art

[0002] Solar panels, also known as solar cell modules or photovoltaic modules, are composed of a series of crystalline silicon cells connected in series or in parallel and packaged together in different arrangements. In recent years, new energy products represented by new energy vehicles have developed rapidly. With the increase in the number of new energy products, the charging problem has brought some troubles to people. When photovoltaic modules are installed on the surface of new energy products, new energy equipment can be charged while working, which can reduce the charging times of new energy products to a certain extent.

[0003] Conventional modules are usually designed with fixed sizes for large ground power stations and container sizes. Due to the problems of low toughness, large size and high thickness of conventional photovoltaic modules, they are only suitable for open environments such as large ground power stations and rooftop distribution. As a non-conventional module installed in a specific environment, the flexible module should have a stronger adaptability to the installation environment. When the flexible module is smaller in size, it will have better flexibility and more flexible installation methods. At this time, new energy products can choose a certain number of modules according to their own shape, without the need to design the surface shape separately, and get rid of the limitation of the module size on the structural design of new energy products.

[0004] However, the flexible components of the prior art usually replace the front plate of the conventional component with a flexible front plate, and the size of the flexible front plate is slightly different from that of the conventional component. When the photovoltaic component is installed on the surface of the new energy equipment, the surface shape needs to be designed according to the component size, which has caused certain limitations on the design of new energy products. In order to improve the profiling ability of the photovoltaic component and expand the installation range of the photovoltaic component, it is necessary to propose a flexible photovoltaic component unit and a splicable flexible photovoltaic component. Utility Model Content

[0005] The utility model aims to provide a flexible photovoltaic module unit and a splicable flexible photovoltaic module to solve the problems of large module volume, poor flexibility and limited installation space in conventional photovoltaic modules and traditional flexible modules in the prior art.

[0006] To achieve the above-mentioned purpose, in one aspect of the utility model, the utility model provides a flexible photovoltaic module unit, including a packaging body, a twisted-pair cable and a protective buckle; the packaging body includes a flexible front panel, a front packaging film, a battery string, a rear packaging film, and a flexible back panel that are adhesively packaged in sequence from top to bottom; the flexible front panel and the flexible back panel are both made of high molecular polymer materials; the battery string is arranged to be at least one string, and the battery string draws out current through the twisted-pair cable; the protective buckle is fixedly connected to the position where the packaging body draws out the twisted-pair cable.

[0007] Preferably, the battery string is arranged in two strings, and the two battery strings are connected in series via a busbar and then connected to the twisted pair cable.

[0008] Preferably, the battery string comprises a plurality of crystalline silicon cells connected in series in sequence, and the crystalline silicon cell is any one of a PERC cell, a TOPCon cell, a HJT cell, and a BC cell.

[0009] Preferably, the protective buckle is bonded to the packaging body by silicone.

[0010] Preferably, the protective buckle comprises a clamp-plate-shaped buckle body and a connecting end extending from an end surface of one side of the buckle body.

[0011] In another aspect of the utility model, the utility model also provides a splicable flexible photovoltaic module, comprising a plurality of flexible photovoltaic module units as described in any one of the above items, wherein the plurality of flexible photovoltaic module units are connected via a plurality of integrated junction boxes, and the positive and negative poles of two adjacent integrated junction boxes are interconnected.

[0012] Preferably, the integrated junction box includes a junction box body and a plurality of single-strand cables and twisted-pair cables led out from the junction box body, at least one of the twisted-pair cables is connected to the protective buckle, and a plurality of the integrated junction boxes are connected in series through the single-strand cables, and negative and positive terminal terminals are respectively provided at both ends of the single-strand cables after the series connection.

[0013] Preferably, the junction box body comprises a box body, a box cover and a bypass diode located in the box body, a waterproof rubber core is provided in the box body, the box cover is snapped onto the box body, and a waterproof gasket is provided at the joint between the box cover and the box body.

[0014] Preferably, a plurality of the flexible photovoltaic module units are spliced ​​and adhered to the object to be installed by adhesive.

[0015] The utility model discloses the following technical effects:

[0016] The flexible photovoltaic component unit of the utility model has good profiling ability and can be spliced ​​and installed according to different installation occasions, thereby widening the installation range of the photovoltaic component. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 This is a schematic structural diagram of a flexible photovoltaic module unit according to Embodiment 1 of the present utility model;

[0019] Figure 2 This is a layer structure diagram of a flexible photovoltaic module unit according to Example 1 of the utility model;

[0020] Figure 3 This is a connection diagram of a splicable flexible photovoltaic assembly according to Embodiment 2 of the present utility model;

[0021] Figure 4 It is a top view of the integrated junction box in Example 2 of the utility model;

[0022] Figure 5 This is a front view of the integrated junction box in Example 2 of the utility model;

[0023] Figure 6 This is a diagram of a box cover of an integrated junction box in Example 2 of the present utility model;

[0024] Figure 7 It is a schematic diagram of the structure of the protective buckle in Example 1 and Example 2 of the utility model.

[0025] Among them, 1. packaging body; 2. twisted-pair cable; 3. protective buckle; 4. crystalline silicon cell; 5. photovoltaic welding ribbon; 6. busbar; 7. flexible front plate; 8. front packaging film; 9. battery string; 10. rear packaging film; 11. flexible back plate; 12. negative terminal; 13. integrated junction box; 14. positive terminal; 15. pressing nut; 16. bypass diode; 17. waterproof gasket; 18. waterproof rubber core; 19. box cover; 20. box body; 21. single-strand cable; 22. buckle; 23. snap-fit ​​part. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] Conventional photovoltaic modules are divided into single-glass modules and double-glass modules. Single-glass modules are laminated in the form of full tempered glass, front film, battery string, back film, and backboard. Double-glass modules are laminated in the form of front semi-tempered glass, front film, battery string, back film, and back semi-tempered glass. Conventional photovoltaic modules are installed on photovoltaic brackets through aluminum alloy frames. Conventional modules use tempered glass or semi-tempered glass on the front panel and are installed on photovoltaic brackets through aluminum alloy frames. They have poor rigidity and cannot be bent significantly. They are only suitable for large ground power stations and rooftop distribution, and are not suitable for installation on curved surfaces with a certain curvature.

[0028] Traditional flexible components are equivalent to removing the aluminum alloy frame from conventional components, and then replacing the front glass of conventional single-glass components with a flexible transparent polymer material. The junction box is fixed on the front or back of the component with silicone, and adhesives are usually used to fix the component to the surface of the object to be installed.

[0029] Although traditional flexible components are transformed from conventional components and have a certain degree of flexibility, they still cannot escape the limitations of the version and can only be installed in large-area curved environments. They are not suitable for installation in small curved environments such as the roofs of new energy vehicles, special-shaped building surfaces, park seats, and electric toy surfaces.

[0030] In addition, the junction box of traditional flexible components is fixedly installed on the surface of the component. When the junction box is placed on the back of the component, a position for the junction box needs to be reserved on the object to be installed before installation. When the junction box is placed on the front of the component, the cables and terminal blocks the light, which not only affects the power generation efficiency, but also reduces the aesthetics of the component and the object to be installed.

[0031] The present invention aims to solve the above problems to a certain extent. In order to make the above objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0032] Embodiment 1:

[0033] Reference Figure 1As shown, embodiment 1 of the utility model proposes a flexible photovoltaic module unit, comprising: a package body 1 which is packaged in sequence by a flexible front plate 7, a front packaging film 8, a battery string 9, a rear packaging film 10, and a flexible back plate 11, a twisted pair cable 2 led out from the package body 1, and a protective buckle 3 fixed to the edge of the package body 1 at the position where the twisted pair cable 2 is led out; wherein the flexible front plate 7 and the flexible back plate 11 are both made of high molecular polymer materials, and the battery string 9 is set to one or two battery strings 9. When the number of parallel battery strings 9 is greater than two, the width of the flexible photovoltaic module will exceed the design value and cannot meet the requirements of flexible deformation. Therefore, it is more appropriate to set one or two battery strings 9, such as Figure 1 As shown, in the present embodiment, the battery strings 9 are preferably two strings, each battery string 9 includes a plurality of crystalline silicon battery cells 4 connected in series in sequence, the positive and negative electrodes of the crystalline silicon battery cells 4 are connected in sequence by welding tapes, the battery strings 9 are connected head to tail by a bus bar 6, and the bus bar 6 is connected to draw out current by a twisted pair cable 2. A protective buckle 3 is provided at the front end of the twisted pair cable 2, and the protective buckle 3 is fixedly connected to the flexible photovoltaic module by silicone. On the one hand, it can prevent the intrusion of water vapor, and on the other hand, it can also improve the toughness of the connection position between the twisted pair cable 2 and the flexible photovoltaic module. The end of the twisted pair cable 2 is used to be connected to the integrated junction box 13.

[0034] Embodiment 2:

[0035] like Figure 3 As shown, Embodiment 2 of the present utility model proposes a splicable flexible photovoltaic module, comprising a plurality of mutually spliced ​​flexible photovoltaic module units, wherein the flexible photovoltaic module unit adopts the flexible photovoltaic module unit described in Embodiment 1. In actual use, the plurality of flexible photovoltaic module units are mutually spliced ​​and electrically connected, and the integrated junction box 13 is placed outside the flexible photovoltaic module. When connected, the end of the twisted pair cable 2 and the integrated junction box 13 are welded together. The positive and negative poles of two adjacent integrated junction boxes 13 are interconnected, and the positive and negative lead-out ends of the integrated junction box 13 are respectively connected to the negative pole terminal 12 and the positive pole terminal 14.

[0036] like Figure 4 and Figure 5 As shown, the integrated junction box 13 includes a box body 20, a bypass diode 16 is arranged in the box body 20, connecting cables are led out from the four sides of the box body 20, and the joints between the connecting cables and the box body 20 are sealed by a waterproof rubber core 18 and fastened by a pressing nut 15. During the tightening process, the pressing nut 15 compresses the compression structure of the threaded end of the junction box body 20, squeezes the waterproof rubber core 18 to deform and shrink, and makes the waterproof rubber core 18 fit tightly with the connecting cable, thereby achieving a waterproof effect.

[0037] The connection cables led out from the box body 20 include two single-strand cables 21 and two twisted-pair cables 2. At least one of the twisted-pair cables 2 is connected to the protective buckle 3. Multiple integrated junction boxes 13 are connected in series through the single-strand cables 21, and negative terminals 12 and positive terminals 14 are respectively provided at the two ends of the single-strand cables 21 after the series connection. The twisted-pair cables 2 have two wires separated by insulating materials, one positive and one negative, which are respectively led out from the front and back of the battery cell and connected to the two ends of the bypass diode 16. During the operation of the component, the bypass diode 16 can effectively prevent the component from being burned due to the hot spot effect. There is only one wire inside the single-strand cable 21, which is used to connect between the two integrated junction boxes 13, and between the integrated junction box 13 and the terminals (negative terminal 12 and positive terminal 14).

[0038] A box cover 19 is snap-fitted on the box body 20 . The box cover 19 and the box body 20 are snap-fitted in a detachable manner, and a waterproof gasket 17 is provided at the joint between the box cover 19 and the box body 20 .

[0039] In some embodiments, a plurality of buckles 22 are raised on the edge of the inner side (the side facing the box body 20) of the box cover 19, and correspondingly, a slot cooperating with the buckle 20 is provided on the inner wall of the box body 20, and a snap connection is formed by the cooperation between the buckle 22 and the slot.

[0040] In some embodiments, a snap-fitting portion 23 is further provided on the outer edge of the box cover 19, and the snap-fitting portion is a groove body that is recessed toward the middle of the box cover. Correspondingly, a snap block that cooperates with the snap-fitting portion 23 is protruded from the inner wall of the box body 20. Through the cooperation between the snap block and the snap-fitting portion 23, and the cooperation between the buckle 22 and the slot, the box cover 19 can be tightly snapped onto the box body 20.

[0041] In some embodiments, the buckles 22 are located at two opposite sides of the box cover 19 , and the snap-fitting portions 23 are located at the other two opposite sides of the box cover, and the two are alternately distributed on the four edges of the box cover 19 .

[0042] In some embodiments, the crystalline silicon cell 4 may be any one of a PERC cell, a TOPCon cell, a HJT cell, and a BC cell.

[0043] In some embodiments, the structure of the protective buckle 3 is as follows: Figure 7 As shown, it includes a clamp-plate-shaped buckle body and a connecting end extending from an end surface of one side of the buckle body.

[0044] In some embodiments, a plurality of flexible photovoltaic module units are adhered to the object to be installed by adhesive, and during the installation process, the edges of the plurality of flexible photovoltaic module units are aligned so as to be closely spliced ​​and assembled.

[0045] The flexible photovoltaic module unit of the utility model and the splicable flexible photovoltaic module including the flexible photovoltaic module unit have good conformability and thinner thickness. When in use, the module is fixedly installed on the object to be installed by using an adhesive. It can be used to be installed in narrow areas such as the roof of new energy vehicles, the surface of special-shaped buildings, park seats, etc. When a transparent back panel is used, it can be used as a door curtain, skylight, greenhouse film, etc. When in use, the number of modules and the number of junction boxes are selected according to the surface of the object to be installed, the junction boxes are placed in appropriate positions according to the installation environment, and the number of modules and junction boxes is selected according to the shape of the installation object. When a single module is used, no junction box is required. When multiple modules are used, the junction boxes are connected end to end in sequence.

[0046] Beneficial effects of the utility model:

[0047] Each component is composed of only two strings of batteries, which reduces the size of the component, improves the flexibility of the component, and expands the installation range of the component. The appropriate number can be selected for installation according to the shape and area of ​​the installation surface.

[0048] Placing the junction box outside the component reduces the thickness of the component and reduces the stress concentration caused by opening holes in the back panel. It also allows the junction box and the terminal blocks to be placed in a position that does not affect the aesthetics, thereby improving the aesthetics of the component.

[0049] The junction box integrates bypass diodes and terminal blocks, which reduces the consumption of component raw materials and component production costs. It can also be freely spliced ​​and installed according to needs. During the installation process, the length of the twisted pair cable between the flexible component unit and the integrated junction box, the length of the single-strand cable between adjacent junction boxes, and the length of the single-strand cable between the integrated junction box and the positive and negative terminals can be controlled as needed, thereby improving the installation flexibility of the component.

[0050] The parts not described in detail in the present invention are all conventional technical means known to those skilled in the art.

[0051] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0052] The embodiments described above are only descriptions of the preferred methods of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should fall within the protection scope determined by the claims of the present invention.

Claims

1. A flexible photovoltaic module unit, characterized in that: The invention comprises a packaging body (1), a twisted pair cable (2) and a protective buckle (3); the packaging body (1) comprises a flexible front plate (7), a front packaging film (8), a battery string (9), a rear packaging film (10) and a flexible back plate (11) which are adhesively packaged in sequence from top to bottom; the flexible front plate (7) and the flexible back plate (11) are both made of high molecular polymer materials; the battery string (9) is arranged to be at least one string, and the battery string (9) draws out current through the twisted pair cable (2); the protective buckle (3) is fixedly connected to the position where the packaging body (1) draws out the twisted pair cable (2).

2. The flexible photovoltaic module unit according to claim 1, characterized in that: The battery string (9) is arranged in two strings, and the two battery strings (9) are connected in series via a busbar (6) and then connected to the twisted pair cable (2).

3. The flexible photovoltaic module unit according to claim 2, characterized in that: The cell string (9) comprises a plurality of crystalline silicon cell sheets (4) connected in series in sequence, and the crystalline silicon cell sheets (4) are any one of PERC cells, TOPCon cells, HJT cells, and BC cells.

4. The flexible photovoltaic module unit according to claim 1, characterized in that: The protective buckle (3) is bonded to the packaging body (1) via silicone.

5. The flexible photovoltaic module unit according to claim 4, characterized in that: The protective buckle (3) comprises a clamping plate-shaped buckle body and a connecting end extending from an end surface of one side of the buckle body.

6. A splicable flexible photovoltaic module, characterized in that: It comprises a plurality of flexible photovoltaic component units as claimed in any one of claims 1 to 5, wherein the plurality of flexible photovoltaic component units are connected via a plurality of integrated junction boxes (13), and the positive and negative poles of two adjacent integrated junction boxes (13) are interconnected.

7. The splicable flexible photovoltaic assembly according to claim 6, characterized in that: The integrated junction box (13) comprises a junction box body and a plurality of single-strand cables (21) and twisted-pair cables (2) led out from the junction box body, at least one of the twisted-pair cables (2) being connected to the protective buckle (3), a plurality of the integrated junction boxes (13) being connected in series via the single-strand cables (21), and a negative electrode terminal (12) and a positive electrode terminal (14) being respectively arranged at both ends of the single-strand cables (21) after the series connection.

8. The splicable flexible photovoltaic assembly according to claim 7, characterized in that: The junction box body comprises a box body (20), a box cover (19) and a bypass diode (16) located in the box body (20); a waterproof rubber core (18) is provided in the box body; the box cover (19) is snap-connected to the box body (20); and a waterproof gasket (17) is provided at the joint between the box cover (19) and the box body (20).

9. The splicable flexible photovoltaic assembly according to claim 6, characterized in that: A plurality of the flexible photovoltaic module units are spliced ​​and adhered to the object to be installed by adhesive.

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