Back electric field installation structure of multi-main-grid solar cell panel

Abstract

The utility model relates to the technical field of solar cell panels, in particular to a back electric field mounting structure of a multi-main-grid solar cell panel, which comprises a cell sheet, a back electric field plate mounted below the cell sheet, a cell sheet frame mounted on the outer layer of the cell sheet, and a cell sheet plug-in groove arranged on the side surface of the cell sheet frame. A square groove is formed in the top surface of the back electric field plate frame, the battery piece frame is mounted in the square groove, a frame is mounted on the outer side of the back electric field plate frame, a screw hole is formed in the bottom surface of the back electric field plate frame, a screwing stud is screwed in the screw hole, and an extrusion cavity is formed in one side of the back electric field plate frame; an extrusion block is movably inserted into the extrusion cavity; the device has the beneficial effects that through a simple structure, the problem that the back electric field plate is inconvenient to disassemble after being used for a long time is solved, the back electric field plate can be conveniently disassembled from the battery piece, the disassembly operation is simple and convenient, and the maintenance after the back electric field plate goes wrong is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of solar cell panels, in particular to a back electric field installation structure of a multi-main grid solar cell panel. Background Art

[0002] A solar panel is a device that uses the photovoltaic effect to convert sunlight directly into electrical energy. It converts solar radiation energy into electrical energy through the photoelectric effect or the photochemical effect. It is a clean and renewable way of utilizing energy. Multi-busbar solar energy, a multi-busbar solar panel is a high-efficiency solar panel. Its structural feature is that multiple busbars are set on each solar cell unit to increase the current collection efficiency. Compared with traditional single-busbar solar panels, multi-busbar solar panels have higher photoelectric conversion efficiency and reliability. Back field effect solar cells, also known as back field P+-zone solar cells, are a special type of solar cell. Its characteristic is that an electric field pointing in the same direction as the original built-in electric field is added to the back of the conventional cell to form a high-low junction electric field to increase the open circuit voltage.

[0003] In the prior art, the back electric field of a multi-busbar solar cell panel is mainly fixed on the surface of the multi-busbar solar cell panel by aluminum plating.

[0004] However, after a long period of use, if the back electric field plate fails, the efficiency of the solar panel in generating electricity will be reduced or even unable to generate electricity. At this time, if it needs to be repaired, it can only be removed from the solar panel and the aluminum coating between the back electric field plate and the battery cell will be scraped off. In the process of scraping, it is very easy to damage the structure of the battery cell or the back electric field plate, and the removal process is more difficult, which prolongs its maintenance cycle and increases its maintenance cost. If it is not repaired and directly replaced as a whole, the cost will increase greatly. Utility Model Content

[0005] The purpose of the utility model is to provide a multi-main-grid solar cell panel back electric field installation structure to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a multi-main-grid solar cell panel back electric field installation structure, including a battery cell, a back electric field plate installed under the battery cell, a battery cell frame installed on the outer layer of the battery cell, a battery cell plug-in groove is provided on the side of the battery cell frame, a back electric field plate frame is sleeved on the outside of the back electric field plate, a square groove is provided on the top surface of the back electric field plate frame, the battery cell frame is installed in the square groove, a frame is installed on the outer side of the back electric field plate frame, a screw hole is provided on the bottom surface of the back electric field plate frame, a screw stud is screwed in the screw hole, an extrusion cavity is provided on one side of the back electric field plate frame, an extrusion block is movably inserted in the extrusion cavity, a first plug-in hole is provided on one side wall of the extrusion cavity, a first plug-in block is movably inserted in the first plug-in hole, a second plug-in hole is provided on the other side wall of the extrusion cavity, a second plug-in hole is provided, a second plug-in block is movably inserted in the second plug-in hole, and a frame plug-in groove is provided on the inner wall of one side of the frame.

[0007] Preferably, a group of EVA films are installed above the battery cells, a group of EVA films are installed below the back electric field plates, tempered glass is installed on the top of the EVA films installed above the battery cells, and a TPT back plate is installed on the bottom of the EVA film installed below the back electric field plates. The battery cells, back electric field plates, EVA films, tempered glass, and TPT back plate are all installed in the cavity of the frame.

[0008] Preferably, a bearing is fixed in the screw hole, the inner ring surface of the bearing is rotatably connected to the screw stud, a fixed bearing is installed at the center of the top surface of the extrusion cavity, and the inner ring surface of the fixed bearing is rotatably connected to the top of the screw stud.

[0009] Preferably, a first inclined surface and a second inclined surface are provided on the top surface of the extrusion block, the first inclined surface faces the first plug-in block, and the second inclined surface faces the second plug-in block. A threaded hole is provided on the top surface of the extrusion block, and the threaded hole passes through the extrusion block.

[0010] Preferably, a first extrusion slope is provided on one end of the bottom surface of the first plug-in block close to the extrusion block, a second extrusion slope is provided on one end of the bottom surface of the second plug-in block close to the extrusion block, return springs are installed on both sides of the surface of one end of the first plug-in block close to the extrusion block, and return springs are installed on both sides of the surface of one end of the second plug-in block close to the extrusion block, and one end of the return spring is fixed on the side wall of the extrusion cavity.

[0011] Preferably, the size and position of the first plug-in block correspond one-to-one with the battery cell plug-in slot, and the size and position of the second plug-in block correspond one-to-one with the frame plug-in slot.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] The utility model proposes a back electric field installation structure for a multi-main-grid solar cell panel, in which a cell frame is installed on the outer layer of the cell, a cell plug-in groove is provided on the side of the cell frame, a back electric field plate frame is sleeved on the outside of the back electric field plate, a square groove is provided on the top surface of the back electric field plate frame, and the cell frame is installed in the square groove. Through the above structure, it can ensure that the cell and the back electric field plate have good contact and can also be installed together with the back electric field plate, a screw hole is provided on the bottom surface of the back electric field plate frame, a screw stud is screwed in the screw hole, an extrusion cavity is provided on one side of the back electric field plate frame, an extrusion block is movably plugged in the extrusion cavity, a first plug-in hole is provided on one side wall of the extrusion cavity, a first plug-in block is movably plugged in the first plug-in hole, and a screw hole is provided on the other side wall of the extrusion cavity. A second plug-in hole is provided, in which a second plug-in block is movably plugged, and a frame plug-in groove is provided on an inner wall of one side of the frame. The extrusion block is moved upward by screwing the screwing stud, and the first plug-in block is pushed out of the first plug-in hole and inserted into the battery cell plug-in groove, so that the battery cell frame and the back electric field plate frame are fixed and limited, and then the battery cell and the back electric field plate are fixed and limited, and the screwing stud continues to move upward to push the second plug-in block out of the second plug-in hole and then plug it into the frame plug-in groove, so that the back electric field plate frame is fixed and limited on the frame. The device solves the problem of inconvenient disassembly of the back electric field plate after long-term use through a simple structure, and facilitates the disassembly of the back electric field plate from the battery cell. The disassembly operation is simple and it is convenient for maintenance after problems occur. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the assembled structure of a multi-busbar solar panel of the utility model;

[0015] Figure 2 This is an exploded view of the integrated structure of the multi-main-grid solar panel of the utility model;

[0016] Figure 3 This is a schematic diagram of the battery cell assembly structure of the utility model;

[0017] Figure 4 This is a schematic diagram of the back electric field plate assembly structure of the utility model;

[0018] Figure 5 A schematic diagram of the back electric field plate assembly structure of the utility model when viewed from above;

[0019] Figure 6 for Figure 5 Schematic diagram of the structural section at AA in the middle;

[0020] Figure 7 for Figure 6 A schematic diagram of the structure enlargement in the middle;

[0021] Figure 8This is a schematic side view of the back electric field plate of the utility model;

[0022] Fig. 9 for Figure 8 Schematic diagram of the structural section at BB in the middle;

[0023] Fig.10 for Fig. 9 A magnified schematic diagram of the structure at B in the middle;

[0024] Fig.11 This is a schematic diagram of the assembly structure of the extrusion block structure of the utility model;

[0025] Fig.12 This is a schematic diagram of the assembly structure of the first plug-in block of the utility model;

[0026] Fig.13 This is a schematic diagram of the second plug-in block assembly structure of the utility model.

[0027] In the figure: battery cell 1, back electric field plate 2, EVA film 3, tempered glass 4, TPT back plate 5, frame 6, battery cell frame 7, battery cell plug-in slot 8, back electric field plate frame 9, screw hole 10, screw stud 11, extrusion cavity 12, extrusion block 13, first inclined surface 14, second inclined surface 15, first plug-in block 16, first plug-in hole 17, second plug-in block 18, second plug-in hole 19, reset spring 20, frame plug-in slot 21. DETAILED DESCRIPTION

[0028] In order to make the purpose and technical solution of the utility model clearly and completely described, and the advantages more clearly understood, the embodiments of the utility model are further described in detail in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are part of the embodiments of the utility model, not all of the embodiments, and are only used to explain the embodiments of the utility model, and are not used to limit the embodiments of 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.

[0029] Embodiment 1

[0030] See also Figures 1 to 13The utility model provides a technical solution: a multi-main grid solar panel back electric field installation structure, including a battery cell 1, a back electric field plate 2 is installed below the battery cell 1, a battery cell frame 7 is installed on the outer layer of the battery cell 1, a battery cell plug-in slot 8 is opened on the side of the battery cell frame 7, a back electric field plate frame 9 is sleeved on the outside of the back electric field plate 2, a square groove is opened on the top surface of the back electric field plate frame 9, the battery cell frame 7 is installed in the square groove, a frame 6 is installed on the outside of the back electric field plate frame 9, and the bottom of the back electric field plate frame 9 is provided with a back electric field plate frame 9. A screw hole 10 is provided on the surface, and a screw stud 11 is screwed into the screw hole 10; an extrusion cavity 12 is provided on one side of the back electric field plate frame 9, and an extrusion block 13 is movably inserted in the extrusion cavity 12; a first plug-in hole 17 is provided on the side wall of one side of the extrusion cavity 12, and a first plug-in block 16 is movably inserted in the first plug-in hole 17; a second plug-in hole 19 is provided on the side wall of the other side of the extrusion cavity 12, and a second plug-in block 18 is movably inserted in the second plug-in hole 19; a frame plug-in groove 21 is provided on the inner wall of one side of the frame 6.

[0031] A cell frame 7 is installed on the outer layer of the cell 1, a cell plug-in slot 8 is provided on the side of the cell frame 7, a back electric field plate frame 9 is sleeved on the outside of the back electric field plate 2, a square slot is provided on the top surface of the back electric field plate frame 9, and the cell frame 7 is installed in the square slot. Through the above structure, it can ensure that the cell 1 and the back electric field plate 2 have good contact, and the cell 1 and the back electric field plate 2 can be installed together, a screw hole 10 is provided on the bottom surface of the back electric field plate frame 9, and a screw stud 11 is screwed in the screw hole 10, an extrusion cavity 12 is provided on one side of the back electric field plate frame 9, an extrusion block 13 is movably inserted in the extrusion cavity 12, and a first plug-in hole 17 is provided on the side wall of one side of the extrusion cavity 12, and the first plug-in hole 17 A first plug-in block 16 is movably inserted inside, a second plug-in hole 19 is provided on the side wall of the other side of the extrusion cavity 12, a second plug-in block 18 is movably inserted in the second plug-in hole 19, a frame plug-in groove 21 is provided on the inner wall of one side of the frame 6, the extrusion block 13 is moved upward by screwing the screwing stud 11, the first plug-in block 16 is pushed out from the first plug-in hole 17, inserted into the battery cell plug-in groove 8, the battery cell frame 7 and the back electric field plate frame 9 are fixed and limited, and then the battery cell 1 and the back electric field plate 2 are fixed and limited, the screw stud 11 continues to move upward, the second plug-in block 18 is pushed out from the second plug-in hole 19, and then plugged into the frame plug-in groove 21, the back electric field plate frame 9 is fixed and limited on the frame 6.

[0032] Embodiment 2

[0033] See also Figures 2 to 10On the basis of the first embodiment, in order to realize the installation of the battery cell 1 and the back electric field plate 2 together, a bearing is fixed in the screw hole 10, and the inner ring surface of the bearing is rotatably connected to the screw stud 11. A fixed bearing is installed in the center of the top surface of the extrusion cavity 12, and the inner ring surface of the fixed bearing is rotatably connected to the top of the screw stud 11. The top surface of the extrusion block 13 is provided with a first inclined surface 14 and a second inclined surface 15, the first inclined surface 14 faces the direction of the first plug-in block 16, and the second inclined surface 15 faces the direction of the second plug-in block 18. A threaded hole is provided on the top surface of the extrusion block 13, and the threaded hole passes through the extrusion block 13. A first extrusion inclined surface is provided on the bottom surface of the first plug-in block 16 near one end of the extrusion block 13, and the size and position of the first plug-in block 16 correspond one by one to the battery cell plug-in slot 8.

[0034] Install the back electric field plate frame 9 into the square groove on the top surface of the battery cell frame 7, screw 11 to move the extrusion block 13 upward, the first inclined surface 14 on the extrusion block 13 and the first extrusion inclined surface on the first plug-in block 16 squeeze each other, but the extrusion block 13 is limited by the screwing stud 11 and can only move up and down, so the extrusion block 13 squeezes the first plug-in block 16 out of the first plug-in hole 17, and then one end of the first plug-in block 16 is plugged into the battery cell plug-in slot 8, completing the limitation of the battery cell frame 7 and the back electric field plate frame 9, and then fixing the battery cell 1 and the back electric field plate 2 together.

[0035] Embodiment 3

[0036] See also Figures 2 to 10 On the basis of the second embodiment, in order to achieve the fixed position of the back electric field plate 2 and the frame 6, a second extrusion slope is provided on the bottom surface of the second plug-in block 18 close to the extrusion block 13, and the size and position of the second plug-in block 18 correspond one-to-one to the frame plug-in slot 21.

[0037] When the extrusion block 13 continues to move upward, by the same token, the second inclined surface 15 on the extrusion block 13 and the second extrusion inclined surface squeeze each other, and the extrusion block 13 squeezes the second plug-in block 18 out of the second plug-in hole 19 and plugs it into the frame plug-in groove 21. At this time, the back electric field plate frame 9 is fixed on the frame 6.

[0038] Embodiment 4

[0039] See also Fig.12 and Fig.13 On the basis of Example 3, in order to achieve the reset of the first plug-in block 16 and the second plug-in block 18, reset springs 20 are installed on both sides of the surface of one end of the first plug-in block 16 close to the extrusion block 13, and reset springs 20 are installed on both sides of the surface of one end of the second plug-in block 18 close to the extrusion block 13, and one end of the reset spring 20 is fixed on the side wall of the extrusion cavity 12.

[0040] When it is necessary to remove the back electric field plate 2, screw the screw stud 11 in the opposite direction to sink the extrusion block 13, thereby canceling the extrusion of the extrusion block 13 on the second plug-in block 18 and the second plug-in block 18. At this time, the first plug-in block 16 and the second plug-in block 18 are not affected by external force, and the reset spring 20 contracts to reset the first plug-in block 16 and the second plug-in block 18 to the first plug-in hole 17 and the second plug-in hole 19 respectively, completing the reset operation. At this time, the back electric field plate 2 and the battery cell 1 can be removed.

[0041] In actual use, the back electric field plate frame 9 is installed into the square groove on the top surface of the battery cell frame 7, and the screw 11 is screwed to move the extrusion block 13 upward. The first inclined surface 14 on the extrusion block 13 and the first extrusion inclined surface on the first plug-in block 16 are squeezed against each other, but the extrusion block 13 is limited by the screwing stud 11 and can only move up and down, so the extrusion block 13 squeezes the first plug-in block 16 out of the first plug-in hole 17, and then one end of the first plug-in block 16 is plugged into the battery cell plug-in slot 8, completing the limitation of the battery cell frame 7 and the back electric field plate frame 9, and then fixing the battery cell 1 and the back electric field plate 2 together, and the extrusion block 13 continues to move upward When the back electric field plate 2 needs to be removed, the screw stud 11 is screwed in the opposite direction to make the extrusion block 13 sink, and the extrusion block 13 and the second plug-in block 18 are squeezed by the second extrusion oblique surface against each other. The extrusion block 13 squeezes the second plug-in block 18 out of the second plug-in hole 19 and plugs it into the frame plug-in slot 21. At this time, the back electric field plate frame 9 is fixed on the frame 6. When the back electric field plate 2 needs to be removed, the screw stud 11 is screwed in the opposite direction to make the extrusion block 13 sink, and the extrusion of the second plug-in block 18 and the second plug-in block 18 by the extrusion block 13 is cancelled. At this time, the first plug-in block 16 and the second plug-in block 18 are not subjected to external force, and the reset spring 20 contracts to reset the first plug-in block 16 and the second plug-in block 18 to the first plug-in hole 17 and the second plug-in hole 19 respectively, completing the reset operation. At this time, the back electric field plate 2 and the battery cell 1 can be removed.

[0042] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-busbar solar panel back field installation structure, comprising a solar cell (1), a back field plate (2) installed below the solar cell (1), characterized in that: The outer layer of the battery cell (1) is provided with a battery cell frame (7), and a battery cell insertion slot (8) is provided on the side of the battery cell frame (7). The outer portion of the back electric field plate (2) is provided with a back electric field plate frame (9), and a square slot is provided on the top surface of the back electric field plate frame (9). The battery cell frame (7) is installed in the square slot. A frame (6) is provided on the outer side of the back electric field plate frame (9), and a screw hole (10) is provided on the bottom surface of the back electric field plate frame (9). A screw stud (11) is screwed into the screw hole (10). An extrusion cavity (12) is provided on one side of the panel frame (9), an extrusion block (13) is movably inserted in the extrusion cavity (12), a first plugging hole (17) is provided on one side wall of the extrusion cavity (12), a first plugging block (16) is movably inserted in the first plugging hole (17), a second plugging hole (19) is provided on the other side wall of the extrusion cavity (12), a second plugging block (18) is movably inserted in the second plugging hole (19), and a frame plugging groove (21) is provided on one inner wall of the frame (6).

2. A multi-busbar solar panel back electric field installation structure according to claim 1, characterized in that: A group of EVA films (3) are installed above the battery cell (1), and a group of EVA films (3) are installed below the back electric field plate (2). A tempered glass (4) is installed on the top of the EVA film (3) installed above the battery cell (1), and a TPT back plate (5) is installed on the bottom of the EVA film (3) installed below the back electric field plate (2). The battery cell (1), the back electric field plate (2), the EVA film (3), the tempered glass (4), and the TPT back plate (5) are all installed in a cavity of a frame (6).

3. A multi-busbar solar panel back electric field installation structure according to claim 2, characterized in that: A bearing is fixed in the screw hole (10), and the inner ring surface of the bearing is rotatably connected to the screw stud (11). A fixed bearing is installed at the center of the top surface of the extrusion cavity (12), and the inner ring surface of the fixed bearing is rotatably connected to the top of the screw stud (11).

4. A multi-busbar solar panel back electric field installation structure according to claim 1, characterized in that: The top surface of the extrusion block (13) is provided with a first inclined surface (14) and a second inclined surface (15), the first inclined surface (14) faces the first plug-in block (16), and the second inclined surface (15) faces the second plug-in block (18), and the top surface of the extrusion block (13) is provided with a threaded hole, which passes through the extrusion block (13).

5. The multi-busbar solar panel back electric field installation structure according to claim 1, characterized in that: A first extrusion inclined surface is provided at one end of the bottom surface of the first plug-in block (16) close to the extrusion block (13), and a second extrusion inclined surface is provided at one end of the bottom surface of the second plug-in block (18) close to the extrusion block (13). Return springs (20) are installed on both sides of the surface of one end of the first plug-in block (16) close to the extrusion block (13), and return springs (20) are installed on both sides of the surface of one end of the second plug-in block (18) close to the extrusion block (13), and one end of the return spring (20) is fixed to the side wall of the extrusion cavity (12).

6. The multi-busbar solar panel back electric field installation structure according to claim 1, characterized in that: The size and position of the first plug-in block (16) correspond one-to-one to the battery cell plug-in slot (8), and the size and position of the second plug-in block (18) correspond one-to-one to the frame plug-in slot (21).

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