Sealing rubber mat used in cooperation with photovoltaic module substrate glass and photovoltaic module

Abstract

The utility model provides a sealing rubber mat used in cooperation with a photovoltaic assembly substrate glass and a photovoltaic assembly, the sealing rubber mat is used for covering a wire outlet hole of the substrate glass, and the sealing rubber mat is provided with a sealed gap at a position directly facing the wire outlet hole. According to the sealing rubber mat for the photovoltaic module, the sealing gap is arranged on the rubber mat body, when the outgoing line of the photovoltaic module passes through the sealing gap, the sealing rubber mat has elasticity, so that the side walls on the two sides of the sealing gap can be extruded and deformed by the outgoing line, and the sealing rubber mat is not prone to deformation when the outgoing line passes through the sealing gap. The deformed side walls on the two sides of the sealed gap wrap the outer wall of the outgoing line, so that no gap exists between the inner wall of the sealed gap and the outgoing line, the line outlet hole in the substrate glass is blocked, an EVA adhesive film is prevented from entering the line outlet hole to form a water permeable channel in the laminating process, and the sealing effect of the photovoltaic module is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic modules, and in particular to a sealing rubber pad used in conjunction with a photovoltaic module substrate glass and a photovoltaic module. Background Art

[0002] With the development of photovoltaic cell technology, the requirements for the sealing performance of photovoltaic modules are getting higher and higher. In the prior art, butyl rubber is usually used as the waterproof material of photovoltaic modules.

[0003] For example, in photovoltaic modules, it is necessary to open a wire hole on the substrate glass so that the lead wires of the battery module can be led out to the outside of the photovoltaic module through the wire hole. In order to prevent external water vapor from entering the photovoltaic module through the wire hole, butyl rubber is needed to seal the wire hole. However, due to the difference in fluidity between butyl rubber and EVA (ethylene-vinyl acetate copolymer) film, the EVA film will run out of the butyl rubber at the wire hole, forming a water-permeable channel.

[0004] In order to solve this problem, some existing technologies use a circle of butyl rubber at the position of the back glass outlet hole, and the butyl rubber flows and fills the outlet hole through lamination. However, the fluidity of the EVA film is better than that of the butyl rubber in the initial lamination stage. Before the butyl rubber completes the sealing of the hole, the EVA film will still be squeezed out from the middle of the butyl rubber, forming a water-permeable channel, resulting in water-blocking failure. Utility Model Content

[0005] The utility model aims to at least solve the problem in the prior art that the EVA adhesive film at the wire outlet hole position of the substrate glass will form a water-permeable channel from the butyl adhesive during the lamination process, resulting in sealing failure at the wire outlet hole position, and proposes a sealing adhesive pad and a photovoltaic module used in conjunction with the substrate glass of a photovoltaic module.

[0006] In order to achieve the purpose of the utility model, a sealing pad is provided for use with a photovoltaic module substrate glass. The sealing pad is used to cover the wire outlet hole position of the substrate glass, and the sealing pad has a closed gap at the position opposite to the wire outlet hole position.

[0007] Optionally, the shape of the sealed gap includes: any one of a straight shape, a cross shape or a cross shape.

[0008] Optionally, the closed gap is in a C-shape.

[0009] Optionally, the sealing pad includes: a pad body, used to cover the wire outlet hole position of the substrate glass, the pad body is provided with a wire through hole, and the position of the wire through hole corresponds to the position of the wire outlet hole; a sealing ear, movably connected to the pad body, the sealing ear has a first position and a second position, and the sealing ear switches between the first position and the second position by movement; in the first position of the sealing ear, the sealing ear is located in the wire through hole, and the closed gap is formed between the outer peripheral wall of the sealing ear and the inner peripheral wall of the wire through hole; in the second position of the sealing ear, the sealing ear disengages from and avoids the wire through hole.

[0010] Optionally, the wire passing hole is a waist-shaped hole.

[0011] Optionally, the inner circumferential wall of the wire hole includes: two straight wall segments and two arc segments, the two straight wall segments are arranged opposite to each other in the radial direction, the two arc segments are connected between the two straight wall segments, and the sealing ear is movably connected to one of the straight wall segments.

[0012] Optionally, the sealing ear and the rubber pad body are an integrally formed structure.

[0013] Optionally, the material of the sealing rubber pad includes butyl rubber.

[0014] According to a second aspect of the utility model, a photovoltaic assembly is also disclosed, comprising: the above-mentioned sealing rubber pad.

[0015] Optionally, the photovoltaic module also includes: a substrate glass, including: a first glass and a second glass, which are arranged parallel to the first glass, and the second glass is provided with the wire outlet hole; a battery module, which is arranged between the first glass and the second glass, and the lead wire of the battery module is passed through the wire outlet hole; a first adhesive film, which is arranged between the battery module and the second glass, and the sealing rubber pad is arranged between the first adhesive film and the second glass, the enclosed gap corresponds to the wire outlet hole, and the lead wire is passed through the enclosed gap.

[0016] Optionally, the sealing rubber pad includes: a rubber pad body, arranged between the first rubber film and the second glass, the rubber pad body being provided with a wire passing hole corresponding to the wire outlet hole; a sealing ear, movably connected to the rubber pad body, the sealing ear having a first position and a second position, and the sealing ear switching between the first position and the second position by movement; in the first position of the sealing ear, the sealing ear is located in the wire passing hole, and the closed gap is formed between the outer peripheral wall of the sealing ear and the inner peripheral wall of the wire passing hole; in the second position of the sealing ear, the sealing ear is located on the side of the rubber pad body facing the second glass.

[0017] The utility model discloses a sealing rubber pad for photovoltaic modules, wherein a closed gap is arranged on the rubber pad body. When the lead wire of the photovoltaic module passes through the closed gap, the side walls on both sides of the closed gap will be squeezed and deformed by the lead wire due to the elasticity of the sealing rubber pad. When the lead wire passes through, the deformed side walls on both sides of the closed gap will wrap the outer wall of the lead wire, so that there is no gap between the inner wall of the closed gap and the lead wire, thereby achieving the blocking of the lead wire hole on the substrate glass, preventing the EVA adhesive film from entering the lead wire hole to form a water-permeable channel during the lamination process, and thus improving the sealing effect of the photovoltaic module. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of the sealing rubber pad of the first embodiment of the utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the sealing rubber pad of the second embodiment of the utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the sealing rubber pad of the third embodiment of the present utility model;

[0021] Figure 4 It is a schematic diagram of the sealing ear of the sealing rubber pad in the third embodiment of the utility model being in the second position;

[0022] Figure 5 This is a schematic diagram of the cooperation between the sealing rubber pad and the lead wire in the third embodiment of the utility model;

[0023] Figure 6 This is a schematic diagram of the structure of the wire hole of the sealing rubber pad in the third embodiment of the utility model;

[0024] Figure 7 This is a schematic diagram of the structure of the sealing rubber pad of the third embodiment of the utility model applied to a photovoltaic module;

[0025] List of reference numerals:

[0026] 10. Sealing rubber pad; 11. Rubber pad body; 12. Wire hole; 121. Straight wall section; 122. Arc section; 13. Sealing ear; 20. Sealed gap; 30. Lead wire; 40. First glass; 50. Second glass; 51. Wire hole; 60. Battery module; 70. First rubber film; 80. Second rubber film. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the technical solution of the present invention, the sealing pad and photovoltaic module provided by the present invention for use with the photovoltaic module substrate glass are described in detail below in conjunction with the accompanying drawings.

[0028] With the development of photovoltaic cell technology, the requirements for the sealing performance of photovoltaic modules are getting higher and higher. In the prior art, butyl rubber is usually used as the waterproof material of photovoltaic modules.

[0029] For example, in photovoltaic modules, it is necessary to open a wire hole on the substrate glass so that the lead wires of the battery module can be led out to the outside of the photovoltaic module through the wire hole. In order to prevent external water vapor from entering the photovoltaic module through the wire hole, butyl rubber is needed to seal the wire hole. However, due to the difference in fluidity between butyl rubber and EVA (ethylene-vinyl acetate copolymer) film, the EVA film will enter the wire hole before the butyl rubber during lamination, causing the EVA film to run out of the butyl rubber at the wire hole, forming a water-permeable channel.

[0030] In order to solve this problem, some existing technologies use a circle of butyl rubber at the position of the back glass outlet hole, and the butyl rubber flows and fills the outlet hole through lamination. However, the fluidity of the EVA film is better than that of the butyl rubber in the initial lamination stage. Before the butyl rubber completes the sealing of the hole, the EVA film will still be squeezed out from the middle of the butyl rubber, forming a water-permeable channel, resulting in water-blocking failure.

[0031] In order to solve the above problems, the embodiment of the utility model discloses a sealing pad used in conjunction with a photovoltaic module substrate glass. The photovoltaic module comprises: a substrate glass with a wire outlet hole 51 , and the sealing pad 10 is used to seal the wire outlet hole 51 .

[0032] like Figure 1 In the first embodiment of the utility model shown, the sealing pad 10 is used to cover the position of the wire outlet hole 51 of the substrate glass, and the sealing pad 10 has a closed gap 20 at the position facing the wire outlet hole 51.

[0033] During assembly, the sealing pad 10 covers the wire outlet hole 51 of the substrate glass, and the lead wire 30 of the photovoltaic module passes through the closed gap 20. Since the sealing pad 10 is elastic, the side walls on both sides of the closed gap 20 will be squeezed and deformed by the lead wire 30 to facilitate the passage of the lead wire. At the same time, the deformed side walls on both sides of the closed gap 20 will wrap the outer wall of the lead wire 30, so that there is no gap between the inner wall of the closed gap 20 and the lead wire 30, thereby achieving the blocking of the wire outlet hole 51 on the substrate glass, preventing the EVA film from entering the wire outlet hole 51 during the lamination process to form a water-permeable channel, thereby improving the sealing effect of the photovoltaic module.

[0034] It should be noted that the closed gap 20 is arranged through the thickness direction of the sealing pad 10 so that the lead wire 30 passes through the sealing pad 10 through the closed gap 20. In order to ensure the wrapping of the outer wall of the lead wire 30, the distance between the inner walls on both sides of the closed gap 20 cannot be too wide. When the lead wire 30 is not arranged in the closed gap 20, the inner walls on both sides of the closed gap 20 can abut against each other, or the distance between the inner walls on both sides of the closed gap 20 is smaller than the size of the lead wire 30.

[0035] In this embodiment, if Figure 1 As shown, the closed gap 20 is in the shape of a straight line. However, this is not restrictive. Figure 2 In the second embodiment shown, the shape of the sealed gap 20 is a cross. In some other embodiments not shown in the figure, the shape of the sealed gap 20 can also be a cross shape or the like.

[0036] like Figure 3 The third embodiment of the utility model shown also discloses a sealing rubber pad 10, whose structure is basically the same as that of the first embodiment, except that, in the present embodiment, the closed gap 20 is in a C-shape. By providing the C-shaped closed gap 20, a larger space is formed when the lead wire 30 passes through the closed gap 20, so that the lead wire 30 can pass more easily, thereby improving the assembly efficiency. At the same time, the lead wire 30 can avoid being scratched by the sealing rubber pad 10 during the process of passing through the closed gap 20, thereby preventing the sealing rubber pad 10 from being deformed and damaged.

[0037] Combine the following Figures 4 to 6 The sealing rubber pad of the third embodiment is specifically described as follows:

[0038] like Figure 4 and Figure 5 As shown, the sealing pad 10 includes: a pad body 11 and a sealing ear 13. The pad body 11 is used to cover the position of the outlet hole 51 of the substrate glass. The pad body 11 is provided with a wire hole 12, and the position of the wire hole 12 corresponds to the position of the outlet hole 51, so that the lead wire 30 can pass through; the sealing ear 13 is movably connected to the pad body 11, and the sealing ear 13 has a first position and a second position. The sealing ear 13 switches between the first position and the second position by movement; in the first position of the sealing ear 13, the sealing ear 13 is located in the wire hole 12, and a closed gap 20 is formed between the outer peripheral wall of the sealing ear 13 and the inner peripheral wall of the wire hole 12, that is, the sealing ear 13 is equivalent to filling between the lead wire 30 and the inner wall of the wire hole 12; in the second position of the sealing ear 13, the sealing ear 13 is separated from and avoids the wire hole 12, so that the lead wire 30 can pass through.

[0039] During assembly, since the sealing ear 13 is movably connected to the pad body 11, the sealing ear 13 can be moved to the second position, that is, disengaged from and avoids the wire hole 12, so that the lead wire 30 can pass through the wire hole 12, so that the sealing pad 10 can cover the position of the wire hole 51 of the substrate glass, and the position of the wire hole 12 corresponds to the position of the wire hole 51. During the lamination process, the sealing ear 13 moves to the first position, that is, enters the wire hole 12, and fills between the lead wire 30 and the inner wall of the wire hole 12, forming a closed gap 20 that wraps the lead wire 30, so that there is no gap between the inner wall of the wire hole 12 and the lead wire 30, thereby achieving the blocking of the wire hole 51 on the substrate glass, preventing the EVA film from entering the wire hole 51 during the lamination process to form a water-permeable channel, thereby improving the sealing effect of the photovoltaic module.

[0040] In this embodiment, the sealing ear 13 and the rubber pad body 11 are an integrally formed structure.

[0041] It can be understood that, in this embodiment, the material of the sealing rubber pad 10 is a waterproof material, such as butyl rubber.

[0042] like Figure 6 As shown, in order to facilitate the passage of the lead wire 30, the wire hole 12 is a waist-shaped hole. It can be understood that the contour of the sealing ear 13 matches the shape of the waist-shaped hole. By matching the contour of the sealing ear 13 with the shape of the waist-shaped hole, it can be ensured that the sealing ear 13 and the inner wall of the waist-shaped hole tightly wrap the lead wire 30 and the sealing ear 13 can seal the waist-shaped hole, thereby improving the sealing effect of the photovoltaic module. In addition, if the wire hole 12 is set by punching, the waist shape is easier to form by punching.

[0043] like Figure 6 As shown, in this embodiment, the inner peripheral wall of the wire hole 12 includes: two straight wall sections 121 and two arc sections 122, the two straight wall sections 121 are arranged opposite to each other in the radial direction, the two arc sections 122 are connected between the two straight wall sections 121, and the sealing ear 13 is movably connected to one of the straight wall sections 121. By movably connecting the sealing ear 13 to one of the straight wall sections 121, the reliability of the connection can be ensured. While ensuring the movably connected, the sealing ear 13 can be prevented from being separated from the rubber pad body 11 during the assembly process, thereby improving the assembly efficiency. In addition, by providing two arc sections 122, during the process of the sealing ear 13 moving to the first position, it is more conducive for the two ends of the sealing ear 13 to enter the wire hole 12, ensuring the close fit between the two ends of the sealing ear 13 and the inner wall of the wire hole 12, improving the sealing performance of the sealing ear 13 and the wire hole 12, and thus effectively avoiding the extrusion of the EVA film.

[0044] like Figure 4As shown, in this embodiment, the wire-passing hole 12 on the rubber pad body 11 is two waist-shaped holes arranged at intervals, the two waist-shaped holes are arranged in parallel, and the two sealing ears 13 are respectively connected to the straight wall sections 121 on the outer sides of the corresponding waist-shaped holes. While facilitating the lead-out wire 30 to pass through the waist-shaped holes, it also ensures that the substrate glass can press and merge the sealing ears 13 to make it fit with the lead-out wire 30 during glass bonding, thereby closing the wire-passing hole 12.

[0045] It should be noted that, in the present embodiment, the wire hole 12 is provided by punching. Specifically, the sealing rubber pad 10 is punched by a C-shaped knife to form the wire hole 12, wherein the portion located inside the C-shaped knife during punching forms the sealing ear 13, and the portion located outside the C-shaped knife forms the rubber pad body 11. The wire hole 12 and the sealing ear 13 are formed by a C-shaped punching method, and the setting of the wire hole 12 and the sealing ear 13 can be completed by punching once, which greatly simplifies the manufacturing process. Not only that, since the sealing ear 13 and the sealing rubber pad 10 are an integrated structure, the reliability of the connection between the two is greatly improved. Also, since the sealing ear 13 and the rubber pad body 11 are made of flexible materials, the two can be flexibly connected to each other, thereby ensuring the convenience of assembly.

[0046] like Figure 7 The application scenario of the third embodiment of the utility model shown also discloses a photovoltaic module, including the above-mentioned sealing pad 10. Specifically, in this embodiment, the photovoltaic module also includes: a substrate glass, a battery module 60, a first adhesive film 70, and a second adhesive film 80.

[0047] Among them, the substrate glass includes: a first glass 40 and a second glass 50, the second glass 50 is arranged parallel to the first glass 40, the battery module 60 is located between the first glass 40 and the second glass 50, the battery module 60 and the first glass 40 are bonded by a second adhesive film 80, a first adhesive film 70 is arranged between the battery module 60 and the second glass 50, and a sealing pad 10 is arranged between the first adhesive film 70 and the second glass 50.

[0048] The second glass 50 is provided with a wire outlet hole 51, the wire hole 12 of the sealing rubber pad 10 corresponds to the wire outlet hole 51, and the sealing ear 13 is located on the side of the rubber pad body 11 facing the second glass 50. Figure 7 As shown, the lead wire 30 connected to the battery module 60 passes through the first adhesive film 70, the wire hole 12 on the adhesive pad body 11 and the wire hole 51 on the second glass 50 in sequence and extends to the outside of the photovoltaic module.

[0049] After the sealing rubber pad 10 is assembled, the sealing ear 13 in the second position is located on the side of the rubber pad body 11 facing the second glass 50. With this design, the direction in which the sealing ear 13 moves from the first position to the second position is the same as the direction in which the lead wire 30 passes through, which not only facilitates the passing of the lead wire 30, but also, because the sealing ear 13 is located during the glass closing, the sealing ear 13 can be pressed into the wire hole 12 of the rubber pad body 11 by the pressing force of the first glass 40 and the second glass 50, so that it fits with the lead wire 30, thereby closing the wire hole 12. On the basis of effectively wrapping the lead wire 30, the wire hole 12 is also closed, which not only simplifies the assembly process, but also effectively prevents the EVA film from flowing out due to the lack of butyl rubber at this position during lamination, thereby effectively avoiding the phenomenon of glue penetration in the lead hole 51 and improving the sealing effect of the photovoltaic module.

[0050] It is understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present invention, but the present invention is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A sealing rubber pad used in conjunction with a photovoltaic module substrate glass, characterized in that: The sealing rubber pad (10) is used to cover the position of the wire outlet hole (51) of the substrate glass, and the sealing rubber pad (10) has a closed gap (20) at the position facing the wire outlet hole (51).

2. The sealing rubber gasket according to claim 1, characterized in that: The shape of the sealed gap (20) includes any one of a straight line, a cross or a cross.

3. The sealing rubber gasket according to claim 1, characterized in that: The sealed gap (20) is in a C-shape.

4. The sealing rubber gasket according to claim 3, characterized in that: The sealing rubber pad (10) comprises: A rubber pad body (11) is used to cover the position of the wire outlet hole (51) of the substrate glass, the rubber pad body (11) is provided with a wire through hole (12), and the position of the wire through hole (12) corresponds to the position of the wire outlet hole (51); A sealing ear (13) is movably connected to the rubber pad body (11), the sealing ear (13) having a first position and a second position, and the sealing ear (13) is switchable between the first position and the second position by movement; In the first position of the sealing ear (13), the sealing ear (13) is located in the wire-passing hole (12), and the sealed gap (20) is formed between the outer peripheral wall of the sealing ear (13) and the inner peripheral wall of the wire-passing hole (12); In the second position of the sealing ear (13), the sealing ear (13) is disengaged from and avoids the wire passing hole (12).

5. The sealing rubber gasket according to claim 4, characterized in that: The wire passing hole (12) is a waist-shaped hole.

6. The sealing rubber gasket according to claim 5, characterized in that: The inner peripheral wall of the wire hole (12) comprises: two straight wall sections (121) and two arc sections (122); the two straight wall sections (121) are arranged opposite to each other in the radial direction; the two arc sections (122) are connected between the two straight wall sections (121); and the sealing ear (13) is movably connected to one of the straight wall sections (121).

7. The sealing rubber gasket according to claim 6, characterized in that: The sealing ear (13) and the rubber pad body (11) are an integrally formed structure.

8. The sealing rubber gasket according to claim 1, characterized in that: The material of the sealing rubber pad (10) includes butyl rubber.

9. A photovoltaic module, characterized in that: include: The sealing rubber gasket (10) according to any one of claims 1 to 8.

10. The photovoltaic module according to claim 9, characterized in that: The photovoltaic module further comprises: The substrate glass comprises: a first glass (40) and a second glass (50), which is arranged parallel to the first glass (40), and the second glass (50) is provided with the wire outlet hole (51); A battery module (60) is arranged between the first glass (40) and the second glass (50), and a lead wire (30) of the battery module (60) is passed through the lead wire hole (51); The first adhesive film (70) is arranged between the battery module (60) and the second glass (50), the sealing adhesive pad (10) is arranged between the first adhesive film (70) and the second glass (50), the sealed gap (20) corresponds to the lead-out hole (51), and the lead-out wire (30) is passed through the sealed gap (20).

11. The photovoltaic module according to claim 10, characterized in that: The sealing rubber pad (10) comprises: A rubber pad body (11) is arranged between the first rubber film (70) and the second glass (50), and the rubber pad body (11) is provided with a wire hole (12) corresponding to the wire outlet hole (51); A sealing ear (13) is movably connected to the rubber pad body (11), the sealing ear (13) having a first position and a second position, and the sealing ear (13) is switchable between the first position and the second position by movement; In the first position of the sealing ear (13), the sealing ear (13) is located in the wire-passing hole (12), and the sealed gap (20) is formed between the outer peripheral wall of the sealing ear (13) and the inner peripheral wall of the wire-passing hole (12); In the second position of the sealing ear (13), the sealing ear (13) is located on a side of the rubber pad body (11) facing the second glass (50).

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