Solar cell panel

Abstract

To provide a solar cell panel capable of preventing infiltration of water from a through-hole to the inside.SOLUTION: According to an aspect of the present invention, there is provided a solar cell panel including a plate-shaped substrate and a flexible solar cell sheet bonded and fixed to the substrate, in which the solar cell sheet has an edge portion that does not have a power generation function by receiving light, a through-hole that penetrates the solar cell sheet and the substrate is formed at a portion corresponding to the edge portion in the solar cell panel, and a sealing portion is formed over an entire circumference of an inner peripheral portion of a first through-hole portion that is a portion formed in the solar cell sheet in the through-hole.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a solar panel comprising a solar cell sheet. [Background technology]

[0002] Flexible photovoltaic sheets have been known for some time (see Patent Document 1). This photovoltaic sheet comprises a back sheet, a power generation section, a barrier sheet, a sealant, and a sealing edge material. The power generation section and sealant are disposed between the back sheet and the barrier sheet. The sealing edge material seals the gap between the outer edges of the back sheet and the barrier sheet. This photovoltaic sheet is adhered with an adhesive to an installation surface constituted by the surface of a building material or the like. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 7449342 Summary of the Invention [Problem to be solved by the invention]

[0004] In recent years, there has been a demand for installing solar cell panels by forming through holes in the solar cell panel and using these through holes to fix the solar cell panel to an installation surface or the like with fastening members such as screws.

[0005] However, when through holes are formed in a solar cell panel, water (rainwater, etc.) may seep into the solar cell panel through the holes, and the power generation section in the solar cell panel may come into contact with the infiltrated water and deteriorate.

[0006] Therefore, an object of the present invention is to provide a solar cell panel that can prevent water from entering the interior through the through holes. [Means for solving the problem]

[0007] The solar cell panel of the present invention comprises: A solar cell panel comprising a plate-shaped substrate and a flexible solar cell sheet adhesively fixed to the substrate, the solar cell sheet has an edge portion that does not have a function of generating electricity by receiving light, a through-hole penetrating the solar cell sheet and the substrate is formed in a portion of the solar cell panel corresponding to the edge portion; A sealing portion is formed around the entire inner periphery of a first through-hole portion, which is a portion of the through-hole formed in the solar cell sheet.

[0008] According to this configuration, the sealing portion is formed around the entire periphery of the inner periphery, so that it is possible to prevent water from entering the inside of the solar cell sheet through the first through-holes.

[0009] In the solar cell panel, a second through-hole portion that constitutes the through-hole is formed in the substrate, The first through-hole portion is formed larger than the second through-hole portion, The inner periphery on which the sealing portion is formed may be disposed outside the inner periphery of the second through-hole portion.

[0010] With this configuration, when a fastening member such as a screw is inserted into the through hole, the male threaded portion of the screw is less likely to come into contact with the sealing portion formed on the inner periphery of the first through hole portion, thereby reducing damage to the sealing portion and preventing water from entering the solar cell sheet from the inner periphery of the first through hole portion.

[0011] Moreover, in the solar cell panel, The sealing portion may be connected to an adhesive layer that fixes the solar cell sheet and the substrate.

[0012] In this way, because the sealing portion is connected to the adhesive layer, the portion of the solar cell sheet where the first through-hole portion is formed is firmly fixed to the substrate, effectively suppressing damage to the sealing portion caused by movement of that portion (the portion where the first through-hole portion is formed), thereby preventing water from penetrating into the solar cell sheet from the inner periphery of the first through-hole portion.

[0013] Moreover, in the solar cell panel, a sealing sheet is fixed to the edge portion, the sealing sheet extending from the light-receiving surface side to the back surface side of the solar cell sheet; The through-hole may penetrate the sealing sheet, and the sealing portion may be formed in the penetration direction of the through-hole from the light-receiving surface side hole portion to the back surface side hole portion of the sealing sheet.

[0014] In this way, by forming a sealing portion at the inner periphery of the first through-hole portion so as to connect the sealing sheets arranged on both sides of the solar cell sheet (see Figure 3), water is more reliably prevented from penetrating into the solar cell sheet from the inner periphery of the first through-hole portion. [Effects of the Invention]

[0015] As described above, according to the present invention, it is possible to provide a solar cell panel that can prevent water from entering the interior through the through holes. [Brief explanation of the drawings]

[0016] [Figure 1] FIG. 1 is a front view of a solar cell panel according to this embodiment. [Figure 2] FIG. 2 is an enlarged cross-sectional view taken along the line II-II in FIG. [Figure 3] FIG. 3 is an enlarged cross-sectional view taken along the line III-III in FIG. [Figure 4] FIG. 4 is an enlarged view for explaining the configuration of the through-hole of the solar cell panel. DETAILED DESCRIPTION OF THE INVENTION

[0017] Hereinafter, one embodiment of the present invention will be described with reference to FIGS.

[0018] 1 to 3, the solar cell panel 1 according to this embodiment includes a plate-shaped substrate 2 and a flexible solar cell sheet 3 adhesively fixed to the substrate 2. The solar cell panel 1 has at least one through-hole 5 at its peripheral edge (panel edge) 10, which penetrates in the thickness direction of the solar cell panel 1 (in other words, the stacking direction of the substrate 2 and the solar cell sheet 3; hereinafter, also simply referred to as the "thickness direction"). The solar cell panel 1 of this embodiment has a plurality of through-holes 5 arranged at intervals along the peripheral edge.

[0019] In the solar cell panel 1 of this embodiment, the through hole 5 is a portion through which a fastening member (or fixing member) such as a screw, bolt, or rivet is inserted to fix the solar cell panel 1 to an installation surface or a frame member for installation.

[0020] In the solar cell panel 1 of this embodiment, the thickness of the substrate 2 is 4 mm, and the thickness of the solar cell sheet 3 is 1 mm. In Figures 1 to 3, the thicknesses (thickness dimensions) of members and parts with small dimensions in the thickness direction are exaggerated to make it easier to understand the configuration of the solar cell panel 1, and the dimensional ratios differ from those of the actual product, etc.

[0021] The substrate 2 is a plate-like member having a predetermined rigidity, and the substrate 2 in this embodiment is a rectangular flat plate-like member. More specifically, the substrate 2 has a plate-like substrate main body 21 and decorative materials 22 arranged on both sides of the substrate main body 21. The substrate 2 has a peripheral edge portion (substrate edge portion) 20 having a plurality of second through-holes 25 penetrating in the thickness direction (see FIG. 3). The substrate edge portion 20 is a portion corresponding to the encapsulating sheet 321 of the solar cell sheet 3 (see FIG. 2).

[0022] The substrate body 21 is made of, for example, a thermoplastic rigid resin such as polyethylene, polypropylene, ABS resin, polyvinyl chloride, etc. The material of the substrate body 21 is not limited to a thermoplastic rigid resin, and may be a wooden board, metal, etc.

[0023] The decorative material 22 is, for example, a metal foil made of aluminum alloy, copper, stainless steel, etc. The decorative material 22 is not limited to a metal foil, and may be a sheet such as a decorative cloth.

[0024] The multiple second through hole portions 25 are arranged at intervals along each side of the square substrate edge portion 20 in the direction in which the side extends, and in the substrate 2 of this embodiment, three second through hole portions 25 are arranged along each side of the substrate edge portion 20. These second through hole portions 25 form part of the through holes 5 of the solar cell panel 1 (see FIGS. 3 and 4), and the second through hole portions 25 of this embodiment are circular holes when viewed in the thickness direction.

[0025] The solar cell sheet 3 is a sheet-like solar cell having a shape corresponding to that of the substrate 2, and has a light-receiving surface 3a that receives light and a back surface 3b that faces the substrate 2. This solar cell sheet 3 is a so-called perovskite solar cell, and is thin and flexible. The solar cell sheet 3 of this embodiment is a square sheet-like solar cell that is adhered to the substrate 2 with an adhesive. That is, an adhesive layer 4 is formed between the substrate 2 and the solar cell sheet 3 in the solar cell panel 1.

[0026] As described above, this adhesive layer 4 is a layer of adhesive formed between the solar cell sheet 3 and the substrate 2, and the thickness of the adhesive layer 4 in this embodiment is 0.1 mm to 1.5 mm. This adhesive is, for example, a modified silicone adhesive containing modified silicone resin as its main component, but is not limited to this. Any adhesive can be selected as long as it can fix the solar cell sheet 3 to the substrate 2.

[0027] Specifically, the solar cell sheet 3 has a power generating section 31 that generates electricity by receiving light, a non-power generating section 32 that does not generate electricity even when it receives light, and a current collecting section 33 that can collect the electricity generated in the power generating section 31 and output it to the outside. The solar cell sheet 3 has a peripheral edge section (sheet edge section (edge ​​section)) 320 with a plurality of first through-holes 35 that penetrate in the thickness direction.

[0028] The power generating section 31 is a section that generates electricity by photoelectric conversion when it receives light, and is formed (placed) closer to the center of the solar cell sheet 3 than the non-power generating section 32. The power generating section 31 of this embodiment is made of, for example, perovskite.

[0029] The non-power generating portion 32 is formed (arranged) in the solar cell sheet 3 so as to surround the periphery of the power generating portion 31. This non-power generating portion 32 includes a sheet edge portion 320 to which a sealing sheet 321 is fixed. Specifically, the sheet edge portion 320 is a portion that constitutes the peripheral edge of the solar cell sheet 3 in the non-power generating portion 32, and is a portion to which the sealing sheet 321 is fixed by adhesion or the like. The sheet edge portion 320 of the solar cell sheet 3 and the substrate edge portion 20 of the substrate 2 constitute the panel edge portion 10 of the solar cell panel 1 (see FIG. 2).

[0030] The sealing sheet 321 is fixed so as to extend from the light-receiving surface 3a side to the back surface 3b side in the non-power generating portion 32. More specifically, in the cross section of the peripheral edge portion of the solar cell sheet 3 (see FIG. 2 ), the sealing sheet 321 extends from the light-receiving surface 3a, across the peripheral edge surface 3c of the solar cell sheet 3, to the back surface 3b.

[0031] The multiple first through hole portions 35 are arranged at intervals in the extension direction of each side of the square sheet edge portion 320, and these multiple first through hole portions 35 are arranged at positions overlapping the corresponding second through hole portions 25 when viewed in the thickness direction. In the solar cell sheet 3 of this embodiment, three first through hole portions 35 are arranged on each side of the sheet edge portion 320.

[0032] Like the second through hole portion 25, the first through hole portion 35 constitutes part of the through hole 5 of the solar cell panel 1 (see Figures 3 and 4), and the first through hole portion 35 in this embodiment is a circular hole when viewed in the thickness direction.

[0033] 4, the first through hole portions 35 of this embodiment are arranged so that their centers coincide or nearly coincide with those of the corresponding second through hole portions 25 when viewed in the thickness direction, and the inner diameter α1 of the first through hole portions 35 is larger than the inner diameter α2 of the second through hole portions 25. As a result, the inner periphery (inner periphery surface) 35a of the first through hole portions 35 is arranged outside the inner periphery (inner periphery surface) 25a of the second through hole portions 25 when viewed from the solar cell sheet 3 side in the thickness direction of the solar cell panel 1.

[0034] The solar cell sheet 3 also has a sealing portion 36 that covers (seals) the entire inner periphery (inner peripheral surface) 35a of each first through-hole 35 (see FIGS. 3 and 4). The sealing portion 36 is formed in the thickness direction from the sealing sheet 321 on the light-receiving surface 3a side of the sheet edge portion 320 of the inner periphery 35a of the first through-hole 35 (the light-receiving surface-side hole of the sealing sheet 321) to the sealing sheet 321 on the back surface 3b side (the back surface-side hole of the sealing sheet 321). The sealing portion 36 is connected to the adhesive layer 4 that fixes the solar cell sheet 3 and the substrate 2. In FIG. 4, the sealing portion 36 is shown schematically as the area indicated by dots.

[0035] The sealing portion 36 of this embodiment is made of the same adhesive as the adhesive that forms the adhesive layer 4. That is, the sealing portion 36 and the adhesive layer 4 are made of the same material. This sealing portion 36 is formed, for example, by applying an adhesive to the back surface 3b of the solar cell sheet 3 by screen printing or the like, superimposing the solar cell sheet 3 on the substrate 2 so that the corresponding first through hole portions 35 and second through hole portions 25 overlap, and then applying the adhesive to the entire circumferential area of ​​the inner periphery 35a of the first through hole portion 35.

[0036] The solar cell panel 1 described above includes a plate-shaped substrate 2 and a flexible solar cell sheet 3 adhesively fixed to the substrate 2. The solar cell sheet 3 has a sheet edge (edge) 320 that does not have a power generation function by receiving light, and a panel edge 10 (a portion corresponding to the sheet edge 320) of the solar cell panel 1 has a through-hole 5 that penetrates the solar cell sheet 3 and the substrate 2. A sealing portion 36 is formed around the entire periphery (more specifically, around the entire circumferential and thickness directions) of an inner periphery 35a of a first through-hole portion 35, which is a portion of the solar cell sheet 3 at the through-hole 5. Since the sealing portion 36 is formed around the entire periphery of the inner periphery 35a, it is possible to prevent water from entering the solar cell sheet 3 from the first through-hole portion 35 (more specifically, the inner periphery 35a).

[0037] In addition, in the solar cell panel 1 of this embodiment, a second through hole portion 25 that constitutes the through hole 5 is formed in the substrate 2, and the first through hole portion 35 is formed larger than the second through hole portion 25, and the inner peripheral portion 35a in which the sealing portion 36 is formed is positioned outside the inner peripheral portion 25a of the second through hole portion 25.

[0038] According to this configuration, when a fastening member such as a screw is inserted into the through hole 5, the male thread portion of the screw is less likely to come into contact with the sealing portion 36 formed on the inner periphery 35a of the first through hole portion 35, thereby reducing damage to the sealing portion 36 and preventing water from entering the solar cell sheet 3 from the inner periphery 35a of the first through hole portion 35.

[0039] Furthermore, in the solar cell panel 1 of this embodiment, the sealing portion 36 is connected to the adhesive layer 4 that fixes the solar cell sheet 3 and the substrate 2. In this way, because the sealing portion 36 is connected to the adhesive layer 4, the portion of the solar cell sheet 3 where the first through-hole portion 35 is formed is firmly fixed to the substrate 2, and damage to the sealing portion 36 caused by movement of the portion where the first through-hole portion 35 is formed is effectively suppressed. This prevents water from entering the solar cell sheet 3 from the inner periphery 35a of the first through-hole portion 35.

[0040] Furthermore, in the solar cell panel 1 of this embodiment, a sealing sheet 321 extending from the light-receiving surface 3a side to the back surface 3b side of the solar cell sheet 3 is fixed to the sheet edge (edge) 320, and the through holes 5 penetrate the sealing sheet 321, and sealing portions 36 are formed in the penetration direction of the through holes 5 from the light-receiving surface side hole portion to the back surface side hole portion of the sealing sheet 321. In this way, the sealing portions 36 are formed so as to connect the sealing sheets 321 arranged on both sides of the solar cell sheet 3 at the inner peripheries 35a of the first through-hole portions 35 (see FIG. 3 ), thereby more reliably preventing water from entering the solar cell sheet 3 from the inner peripheries 35a of the first through-hole portions 35.

[0041] The solar cell panel of the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention. For example, the configuration of one embodiment can be added to the configuration of another embodiment, or part of the configuration of one embodiment can be replaced with the configuration of another embodiment. Furthermore, part of the configuration of one embodiment can be deleted.

[0042] The solar cell sheet 3 of the solar cell panel 1 in the above embodiment is a perovskite solar cell, but is not limited to this configuration. The solar cell sheet 3 may also be an amorphous or compound solar cell, etc. In other words, the solar cell sheet 3 may be any solar cell as long as it is thinner (smaller in thickness dimension) than the substrate 2 and flexible.

[0043] Furthermore, in the solar cell panel 1 of the above embodiment, the substrate 2 is flat (plate-shaped along a predetermined plane), but is not limited to this configuration. The substrate 2 may be curved, such as the circumferential surface of a cylinder.

[0044] Furthermore, in the solar cell panel 1 of the above embodiment, the substrate 2 is configured by the substrate main body 21 and the decorative material 22, but is not limited to this configuration. The substrate 2 does not need to include the decorative material 22, and may be configured only by the substrate main body 21 made of, for example, a thermoplastic resin or a metal.

[0045] Furthermore, in the solar cell panel 1 of the above embodiment, the adhesive layer 4 and the sealing portion 36 are made of the same material (adhesive), but this configuration is not limiting. The adhesive layer 4 and the sealing portion 36 may be made of different materials (different adhesives, etc.). That is, it is sufficient that the sealing portion 36 is made of a material that can prevent water from entering the solar cell sheet 3 from the inner periphery 35a.

[0046] Furthermore, the sealing portion 36 only needs to cover the entire inner periphery (inner periphery surface) 35a of the first through-hole portion 35, and does not need to be connected to the adhesive layer 4. Furthermore, the sealing portion 36 may also be disposed on the inner periphery 25a of the second through-hole portion 25.

[0047] Furthermore, in the solar cell panel 1 of the above embodiment, the inner diameter α1 of the first through-hole portion 35 of the solar cell sheet 3 is larger than the inner diameter α2 of the second through-hole portion 25 of the substrate 2, but is not limited to this configuration. The inner diameter α1 of the first through-hole portion 35 may be the same as or smaller than the inner diameter α2 of the second through-hole portion 25.

[0048] In addition, in the above embodiment, fastening members (or fixing members) such as screws or bolts are inserted into the through holes 5 to fix the solar cell panel 1 to an installation surface, frame, etc., but other members such as cords may also be inserted therethrough. [Explanation of symbols]

[0049] 1...solar cell panel, 10...panel edge portion, 2...substrate, 20...substrate edge portion, 21...substrate body, 22...decorative material, 25...second through-hole portion, 25a...inner peripheral portion (inner peripheral surface), 3...solar cell sheet, 3a...light-receiving surface, 3b...back surface, 3c...peripheral end surface, 31...power generating portion, 32...non-power generating portion, 320...sheet edge portion (edge ​​portion), 321...sealing sheet, 33...current collecting portion, 35...first through-hole portion, 35a...inner peripheral portion (inner peripheral surface), 36...sealing portion, 4...adhesive layer, 5...through hole, α1...inner diameter of first through-hole portion, α2...inner diameter of second through-hole portion

Claims

1. A solar cell panel comprising a plate-shaped substrate and a flexible solar cell sheet adhesively fixed to the substrate, the solar cell sheet has an edge portion that does not have a function of generating electricity by receiving light, a through-hole penetrating the solar cell sheet and the substrate is formed in a portion of the solar cell panel corresponding to the edge portion; A solar cell panel, characterized in that a sealing portion is formed around the entire inner periphery of a first through-hole portion, which is a portion of the through-hole formed in the solar cell sheet.

2. a second through-hole portion that constitutes the through-hole is formed in the substrate, The first through-hole portion is formed larger than the second through-hole portion, The solar cell panel according to claim 1 , wherein the inner periphery on which the sealing portion is formed is disposed outside the inner periphery of the second through-hole portion.

3. 2. The solar cell panel according to claim 1, wherein the sealing portion is connected to an adhesive layer that fixes the solar cell sheet and the substrate.

4. a sealing sheet is fixed to the edge portion, the sealing sheet extending from the light-receiving surface side to the back surface side of the solar cell sheet; The solar cell panel according to any one of claims 1 to 3, characterized in that the through hole penetrates the sealing sheet, and the sealing portion is formed in the penetration direction of the through hole from the light-receiving surface side hole portion to the back surface side hole portion of the sealing sheet.

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