High-insulativity backboard with high light transmission for solar photovoltaic cell

Abstract

The utility model discloses a high-insulativity backboard for a solar photovoltaic cell with high light transmission, relates to the technical field of solar photovoltaic cell backboards, and aims to solve the problems that the overall performance of the conventional solar cell backboard is enhanced through a multi-layer structure, but the backboard is poor in insulativity and poor in insulativity. The solar cell backboard comprises a backboard frame, an insulating lining is arranged in the backboard frame, a first adhesive film, a cell piece, a second adhesive film and photovoltaic glass are installed in the insulating lining, and a junction box is arranged outside the insulating lining; the take-up winding shaft is fixedly arranged on the rear end face of the backboard glass through nail-free glue, a limiting disc is arranged at one end of the take-up winding shaft, and the limiting disc and the take-up winding shaft are of an integrated structure; and the storage grooves are formed in the rear end face of the insulating lining, the number of the storage grooves is four, insulating supporting rods are arranged in the storage grooves, and threaded inner cavities are formed in the insulating supporting rods.

Description

Technical Field

[0001] The utility model relates to the technical field of solar photovoltaic cell back plates, in particular to a high-insulation back plate for solar photovoltaic cells with high light transmittance. Background Art

[0002] The solar cell backsheet is located on the back of the solar panel, protecting and supporting the cells. It has reliable insulation, water resistance and aging resistance. The solar cell backsheet is also called solar cell backsheet film, photovoltaic backsheet, photovoltaic backsheet film and solar backsheet.

[0003] For example, the announcement number is: CN220358104U (named as a solar cell backplane), which is connected to the back of the solar cell panel and includes an adhesive layer, a reflective layer, a substrate layer, and a mechanical protection layer. The reflective layer is connected to the back of the solar cell panel by the adhesive layer, the substrate layer is connected to the reflective layer, and the mechanical protection layer is connected to the substrate layer; the reflective layer is a highly reflective material, which can reflect the unused sunlight of the solar cell panel back to the solar cell panel; the adhesive layer is a pressure-sensitive adhesive material, which is used for the bonding connection between the solar cell backplane and the solar cell panel, and between the reflective layer and the substrate layer; the substrate layer is basalt / aramid / mica paper; the mechanical protection layer is a wear-resistant and anti-corrosion coating, which serves as a protective layer of the solar cell backplane, has the advantages of excellent bonding effect, low price and environmental protection, replaces the existing fluorine-containing material backplane, is provided with a reflective layer, can improve the utilization rate of solar energy, enable the solar cell to absorb light energy more fully, and improve the photoelectric conversion efficiency.

[0004] The above-mentioned solar cell backplane enhances the overall performance of the backplane by setting up a multi-layer structure, but the insulation performance of the backplane is poor, resulting in the problem of poor safety of the solar cell backplane. For this reason, we provide a highly insulating backplane for solar photovoltaic cells with high light transmittance. Utility Model Content

[0005] The purpose of the utility model is to provide a highly light-transmitting and highly insulating backboard for solar photovoltaic cells, so as to solve the problem proposed in the above background technology that the existing solar cell backboard enhances the overall performance of the backboard by setting a multi-layer structure, but the insulation performance of the backboard is poor, resulting in poor safety of the solar cell backboard.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a highly light-transmitting high-insulation back sheet for solar photovoltaic cells, comprising a back sheet frame and a back sheet glass, an insulating lining is arranged inside the back sheet frame, a first adhesive film, a battery cell, a second adhesive film and photovoltaic glass are installed inside the insulating lining, and a junction box is arranged outside the insulating lining;

[0007] Also includes:

[0008] A wire winding shaft is fixed on the rear end surface of the back plate glass by nail-free glue, and a limit plate is provided at one end of the wire winding shaft, and the limit plate and the wire winding shaft are an integrated structure;

[0009] A receiving groove is arranged on the rear end surface of the insulating liner, four receiving grooves are arranged, and an insulating support rod is arranged inside the receiving groove, and a threaded inner cavity is arranged inside the insulating support rod;

[0010] The inner screw head is movably arranged inside the threaded inner cavity, and a guide connecting rod is arranged at one end of the inner screw head, and a grounding foot is arranged at one end of the guide connecting rod. The guide connecting rod, the grounding foot and the inner screw head are an integrated structure.

[0011] Preferably, inner walls on both sides of the receiving groove are provided with inner shaft grooves, connecting shafts are provided inside the two inner shaft grooves, the two connecting shafts are an integral structure with the insulating support rod, and the insulating support rod is movably connected to the inner shaft grooves through the connecting shafts.

[0012] Preferably, a connecting hole is provided at the connecting position between the guide connecting rod and the threaded inner cavity, and the connecting hole and the insulating support rod are an integrated structure.

[0013] Preferably, a back plate glass is embedded inside the insulating lining, and the back plate glass is mechanically sealed to the insulating lining.

[0014] Preferably, four threading holes are arranged inside the limiting disk, and the four threading holes are an integral structure with the limiting disk.

[0015] Preferably, a frame is provided on the outside of the photovoltaic glass, and the frame is fixedly connected to the backboard frame by screws.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] The utility model provides an insulating lining inside the back panel frame, the insulating lining is glass fiber mixed with epoxy resin material, the insulating lining cooperates with the back panel glass to enhance the overall insulation performance of the solar cell back panel, the back panel frame is fixedly connected to the frame by screws, the first adhesive film, the battery cell, the second adhesive film, and the photovoltaic glass are installed inside the insulating lining, so that the insulating lining insulates and protects the solar photovoltaic cell assembly, improves the safety of the overall structure of the solar photovoltaic cell, and overcomes the problem that the existing solar cell back panel enhances the overall performance of the back panel by setting a multi-layer structure, but the insulation performance of the back panel is poor, resulting in poor safety of the solar cell back panel.

[0018] By movably connecting the rotating shaft and the inner shaft groove, the insulating support rod can be movably turned in the storage groove, and then the grounding foot is rotated to make the inner screw head movably connected with the threaded inner cavity, so that the guide connecting rod is rotated and pulled out, so that the length of the insulating support rod is extended, and the solar photovoltaic cell can be quickly tilted and installed through the back plate without the help of a bracket through the grounding support connection of the grounding foot. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of a high-insulation back sheet for a solar photovoltaic cell with high light transmittance according to the utility model;

[0020] Figure 2 This is a schematic diagram of the internal structure of the back panel frame of the utility model;

[0021] Figure 3 This is a schematic diagram of the back structure of the back panel frame of the utility model;

[0022] Figure 4 It is a schematic diagram of the connection structure between the insulating support rod and the storage groove of the utility model;

[0023] In the figure: 1. backplane frame; 2. insulating lining; 3. first adhesive film; 4. battery cell; 5. second adhesive film; 6. photovoltaic glass; 7. frame; 8. junction box; 9. backplane glass; 10. wire winding shaft; 11. limit plate; 12. threading hole; 13. storage groove; 14. insulating support rod; 15. internal shaft groove; 16. connecting shaft; 17. threaded inner cavity; 18. connecting through hole; 19. internal screw head; 20. guide connecting rod; 21. grounding foot. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0025] See also Figure 1-4 The utility model provides an embodiment: a highly light-transmitting high-insulation back sheet for solar photovoltaic cells, comprising a back sheet frame 1 and a back sheet glass 9, an insulating lining 2 is arranged inside the back sheet frame 1, a first adhesive film 3, a battery cell 4, a second adhesive film 5 and a photovoltaic glass 6 are installed inside the insulating lining 2, and a junction box 8 is arranged outside the insulating lining 2;

[0026] Also includes:

[0027] The wire winding shaft 10 is fixed on the rear end surface of the back plate glass 9 by nail-free glue, and a limit plate 11 is provided at one end of the wire winding shaft 10, and the limit plate 11 and the wire winding shaft 10 are an integrated structure;

[0028] A receiving groove 13 is provided on the rear end surface of the insulating liner 2. Four receiving grooves 13 are provided, and an insulating support rod 14 is provided inside the receiving groove 13. A threaded inner cavity 17 is provided inside the insulating support rod 14.

[0029] The internal screw head 19 is movably arranged inside the threaded inner cavity 17, and a guide connecting rod 20 is arranged at one end of the internal screw head 19, and a grounding foot 21 is arranged at one end of the guide connecting rod 20. The guide connecting rod 20, the grounding foot 21 and the internal screw head 19 are an integrated structure.

[0030] When in use, an insulating lining is arranged inside the back panel frame. The insulating lining is a glass fiber mixed with epoxy resin material. The insulating lining cooperates with the back panel glass to enhance the overall insulation performance of the solar cell back panel. The back panel frame is fixedly connected to the frame by screws, and the first adhesive film, the battery cell, the second adhesive film, and the photovoltaic glass are installed inside the insulating lining, so that the insulating lining can insulate and store the solar photovoltaic cell assembly. By the movable connection between the connecting shaft and the inner shaft groove, the insulating support rod can be movably turned in the storage groove, and then the grounding foot is rotated to make the inner screw head and the threaded inner cavity movably connected, so that the guide connecting rod is rotated and pulled out, so that the length of the insulating support rod is extended, and the grounding support connection is connected through the grounding foot. The solar photovoltaic cell can be quickly tilted and installed through the back panel without the help of a bracket.

[0031] See also Figure 4 , inscribed shaft grooves 15 are provided on the inner walls on both sides of the receiving groove 13, and connecting shafts 16 are provided inside the two inscribed shaft grooves 15. The two connecting shafts 16 are integrated with the insulating support rod 14. The insulating support rod 14 is movably connected to the inscribed shaft grooves 15 through the connecting shafts 16. The inscribed shaft grooves 15 provided on the inner walls on both sides of the receiving groove 13 play a role in facilitating the inscribed rotation of the connecting shafts 16.

[0032] See also Figure 4 A connecting hole 18 is provided at the connecting position between the guide connecting rod 20 and the threaded inner cavity 17. The connecting hole 18 and the insulating support rod 14 are an integrated structure. The connecting hole 18 provided at the connecting position between the guide connecting rod 20 and the threaded inner cavity 17 serves to facilitate the guide connecting rod 20 to move in and out of the threaded inner cavity 17.

[0033] See also Figure 2 A back plate glass 9 is embedded inside the insulating lining 2, and the back plate glass 9 is mechanically sealed with the insulating lining 2. The back plate glass 9 embedded inside the insulating lining 2 plays a role in assisting light transmission and enhancing insulation.

[0034] See also Figure 3The limiting plate 11 has four threading holes 12 disposed inside. The four threading holes 12 are all integrated with the limiting plate 11. The four threading holes 12 disposed inside the limiting plate 11 serve to facilitate the extension and pulling out of the connecting wires.

[0035] See also Figure 1 A frame 7 is arranged outside the photovoltaic glass 6, and the frame 7 is fixedly connected to the backboard frame 1 by screws. The frame 7 arranged outside the photovoltaic glass 6 plays a role in protecting the edge of the solar photovoltaic cell.

[0036] Working principle: When in use, an insulating lining 2 is arranged inside the back panel frame 1. The insulating lining 2 is a glass fiber mixed with epoxy resin material. The insulating lining 2 cooperates with the back panel glass 9 to enhance the overall insulation performance of the solar cell back panel. The back panel frame 1 is fixedly connected to the frame 7 by screws. The first adhesive film 3, the battery cell 4, the second adhesive film 5, and the photovoltaic glass 6 are installed inside the insulating lining 2, so that the insulating lining 2 can insulate and protect the solar photovoltaic cell assembly, thereby improving the safety of the overall structure of the solar photovoltaic cell. In addition, when the length of the connecting wire of the junction box 8 is too long, the excess length of the wiring is wound onto the winding shaft 10, and the winding is adjusted by the limit plate 11. The connecting wire is limited in position, and finally the connecting wire is extended and pulled out through the threading hole 12, so as to achieve the purpose of limiting the winding of the excess length of the connecting wire, and the insulating support rod 14 can be movably turned in the storage groove 13 by connecting the rotating shaft 16 and the inner shaft groove 15, and then the grounding foot 21 is rotated to make the inner screw head 19 and the threaded inner cavity 17 movably connected, so that the guide connecting rod 20 is rotated and pulled out, so that the length of the insulating support rod 14 is extended, and the grounding support connection is connected through the grounding foot 21. Without the help of a bracket, the solar photovoltaic cell can be quickly tilted and installed through the backboard, thereby completing the use of the high-insulation backboard for solar photovoltaic cells with high light transmittance.

[0037] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A highly light-transmitting and highly insulating back sheet for a solar photovoltaic cell, comprising a back sheet frame (1) and a back sheet glass (9), wherein an insulating lining (2) is arranged inside the back sheet frame (1), a first adhesive film (3), a cell sheet (4), a second adhesive film (5) and a photovoltaic glass (6) are installed inside the insulating lining (2), and a junction box (8) is arranged outside the insulating lining (2); Features: Also includes: A wire winding shaft (10) is fixedly arranged on the rear end surface of the back plate glass (9) by means of nail-free glue, and a limit plate (11) is arranged at one end of the wire winding shaft (10), and the limit plate (11) and the wire winding shaft (10) are an integral structure; the back plate glass A receiving groove (13) is arranged on the rear end surface of the insulating liner (2), four receiving grooves (13) are arranged, and an insulating support rod (14) is arranged inside the receiving groove (13), and a threaded inner cavity (17) is arranged inside the insulating support rod (14); An internal screw head (19) is movably arranged inside the threaded inner cavity (17), and a guide connecting rod (20) is arranged at one end of the internal screw head (19), and a grounding foot (21) is arranged at one end of the guide connecting rod (20), and the guide connecting rod (20), the grounding foot (21) and the internal screw head (19) are an integral structure.

2. A highly light-transmitting and highly insulating back sheet for solar photovoltaic cells according to claim 1, characterized in that: Inner shaft grooves (15) are provided on the inner walls on both sides of the receiving groove (13), and connecting shafts (16) are provided inside the two inner shaft grooves (15). The two connecting shafts (16) are integrally formed with the insulating support rod (14), and the insulating support rod (14) is movably connected to the inner shaft groove (15) via the connecting shaft (16).

3. The highly light-transmitting and highly insulating back sheet for solar photovoltaic cells according to claim 1, characterized in that: A connecting hole (18) is provided at the connecting position between the guide connecting rod (20) and the threaded inner cavity (17), and the connecting hole (18) and the insulating support rod (14) are an integral structure.

4. The highly light-transmitting and highly insulating back sheet for solar photovoltaic cells according to claim 1, characterized in that: A back panel glass (9) is embedded inside the insulating lining (2), and the back panel glass (9) is mechanically sealed to the insulating lining (2).

5. The highly light-transmitting and highly insulating back sheet for solar photovoltaic cells according to claim 1, characterized in that: Four threading holes (12) are arranged inside the limiting disk (11), and the four threading holes (12) are all integrally formed with the limiting disk (11).

6. The highly light-transmitting and highly insulating back sheet for solar photovoltaic cells according to claim 1, characterized in that: The photovoltaic glass (6) is provided with a frame (7) on the outside, and the frame (7) is fixedly connected to the back panel frame (1) by means of screws.

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