JP2020009970A - Solar cell module, wall forming member, and solar cell system - Google Patents

Abstract

To provide a solar cell module that can suppress occurrence of spontaneous damage in tempered glass due to an external impact.SOLUTION: A solar cell module includes a first sealing member, a second sealing member, and solar cell, and the solar cell is disposed between the first sealing member and the second sealing member, the first sealing member forms one main surface of the solar cell module, a first tempered glass layer, a buffer layer, and an anti-glare layer are laminated from the solar cell side, the first tempered glass layer is made of tempered glass having a compression stress layer on the surface on the buffer layer side, and the buffer layer has the average thickness of 0.5 mm or more and is elastically deformable, the anti-glare layer is a film or plate, and the surface opposite to the buffer layer is formed with surface irregularities that scatter visible light.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a solar cell module, a wall forming member, and a solar cell system.

  BACKGROUND ART Conventionally, an anti-glare solar cell module that prevents glare or the like due to reflection on a light receiving surface has been known (for example, Patent Document 1). In this antiglare solar cell module, fine surface irregularities are formed on the light receiving surface by blasting, and the surface irregularities scatter visible light to prevent glare due to reflection on the surface.

  When the solar cell module is installed on an outer wall surface outdoors, there is a possibility that the solar cell module will be subjected to physical impacts such as stoning and wind pressure. Therefore, the solar cell module needs to have strength to withstand these physical impacts. Therefore, conventionally, attempts have been made to enhance the strength of the solar cell module by using tempered glass as a sealing member for sealing the solar cell (Patent Document 2).

JP-A-2006-58697 JP 2003-110128 A

  Generally, tempered glass has a three-layer structure of a compressive stress layer, a tensile stress layer, and a compressive stress layer, and the surface strength is ordinary non-strengthened glass (float glass) by the balance of tensile stress and compressive stress. It has about three to five times the strength as compared to.

However, although tempered glass has higher strength than ordinary non-tempered glass, the surface and corners of the glass are once cracked by a physical impact from the outside, and the crack is pulled beyond the compressive stress layer. When the stress layer is reached, the balance between the compressive stress and the tensile stress is lost, and there is a problem of so-called spontaneous breakage, in which the tempered glass is broken into fine particles instantaneously.
That is, as in Patent Literature 1, when surface irregularities are formed by blasting on the surface of tempered glass to add an antiglare function, cracks may occur on the surface, and natural destruction may occur during manufacturing. In addition, when a potential crack is formed in the compressive stress layer by blasting, if a physical impact is applied from the outside, the crack may spread and spontaneous fracture may occur.

  Therefore, an object of the present invention is to provide a solar cell module, a wall forming member, and a solar cell system that can suppress occurrence of spontaneous damage in tempered glass due to external impact.

  The invention according to claim 1 for solving the above-described problem includes a first sealing member, a second sealing member, and a solar cell, wherein the solar cell includes the first sealing member and the first sealing member. A solar cell module arranged between second sealing members, wherein the first sealing member forms one main surface of the solar cell module, and from the solar cell side, A first tempered glass layer, a buffer layer, and an antiglare layer are laminated, and the first tempered glass layer is made of tempered glass having a compressive stress layer on a surface on the buffer layer side, The layer has an average thickness of 0.5 mm or more and is elastically deformable, and the anti-glare layer has a film shape or a plate shape, and scatters visible light on the surface opposite to the buffer layer. This is a solar cell module having surface irregularities.

According to the configuration of the present invention, since the first tempered glass layer is provided, higher strength can be ensured as compared with the case where ordinary non-tempered glass is used.
According to the structure of the present invention, since the antiglare layer is provided separately from the first tempered glass layer, natural damage and potential cracking during the production of the tempered glass due to the formation of the surface irregularities of the tempered glass are prevented. it can.
According to the configuration of the present invention, the buffer layer having an average thickness of 0.5 mm or more is interposed between the first tempered glass layer and the antiglare layer. That is, since a buffer layer that is thicker than the adhesive layer or the like used for normal adhesive applications is interposed between the first tempered glass layer and the anti-glare layer, physical The shock is alleviated by the buffer layer, and can be prevented from being transmitted further inward beyond the compressive stress layer of the first tempered glass layer.
According to the configuration of the present invention, since the anti-glare layer that scatters visible light is provided, an anti-glare function can be ensured, and glare and the like hardly occur.

  The invention according to claim 2, wherein the anti-glare layer is formed of non-tempered glass, has an average thickness of 0.05 mm or more and 0.7 mm or less, and the average thickness of the buffer layer is The solar cell module according to claim 1, wherein the solar cell module has an average thickness of the antiglare layer or more.

  The term “non-tempered glass” as used herein refers to a glass other than tempered glass and having no compression stress layer and no tensile stress layer.

  According to the configuration of the present invention, the antiglare layer is formed of a thin non-tempered glass thin enough to be easily bent, and the thickness of the buffer layer is 0.5 mm or more and the thickness of the antiglare layer is more than The buffer layer can absorb the deflection of the anti-glare layer when subjected to a physical impact, and is less likely to bend and break.

  In the invention according to claim 3, the anti-glare layer has an anti-glare region in which the surface irregularities are formed when the first sealing member is viewed from the front, and the anti-glare region is a JIS Z 8741: a 60-degree specular glossiness according to 1997 is 6% or less, and a maximum reflectance when light is incident at an angle of 60 degrees with respect to a normal line of the one main surface is 1% or less; The solar cell module according to claim 1, wherein the anti-glare region has an arithmetic average roughness Ra according to JIS B 0601: 2013 of 0.2 μm or more and 1 μm or less.

  According to the configuration of the present invention, a good anti-glare function can be exhibited.

  The invention according to claim 4, wherein the first sealing member has a protective layer that covers the surface irregularities of the antiglare layer, wherein the protective layer has an average thickness of 1 µm or more and 10 µm or less; The solar cell module according to any one of claims 1 to 3, wherein the solar cell module is formed of a system resin.

  The term "fluororesin" as used herein includes not only fluororesin but also one in which only a part thereof is substituted with another substituent while maintaining the skeleton structure of the fluororesin.

  According to the configuration of the present invention, the impact resistance on the surface can be further improved.

  By the way, conventionally, when a solar cell is installed on a wall or the like, a solar cell module of the same design has been spread over a roof or a wall. For this reason, the solar cell modules in all parts had the same design, and had a monotonous and interesting appearance.

  Therefore, in the invention according to claim 5, in the antiglare layer, when the first sealing member is viewed from the front, the antiglare region in which the surface unevenness is formed and the surface unevenness are not formed. The solar cell module according to any one of claims 1 to 4, further comprising a non-glare region, wherein the non-glare region forms a predetermined pattern.

  The “pattern” here includes figures, pictures, characters, and the like.

  According to the configuration of the present invention, the pattern of the non-glare area appears to be raised when sunlight is applied due to the difference in the degree of light scattering of visible light between the anti-glare area and the non-glare area. For this reason, a solar cell module having an unprecedented design property is obtained.

The invention according to claim 6, wherein the buffer layer satisfies the following configuration (1) or (2), and at least a portion overlapping the solar cell when viewed from the front is colored. A solar cell module according to any one of claims 1 to 5.
(1) The buffer layer has a laminated structure including a dye layer and a resin layer.
(2) The buffer layer is a single layer containing a dye component in a resin.

  According to the configuration of the present invention, since the portion overlapping with the solar cell is colored, the solar cell can be made inconspicuous, and it can be difficult to determine that the solar cell module has a built-in solar cell in appearance.

  By the way, when a solar cell module is used as an exterior building material forming a wall surface of a building, not only strength but also additional functions other than power generation, such as sound insulation and sound insulation, are required.

  Therefore, an invention according to claim 7 is a wall forming member using the solar cell module according to any one of claims 1 to 6, wherein the wall forming member forms an outer wall surface of a building. The second sealing member has a second tempered glass layer, and the second tempered glass layer is made of tempered glass having a compressive stress layer on a surface on a side opposite to the solar battery cell. It is a member.

According to the configuration of the present invention, since two tempered glass layers are provided, the strength as a building material forming a wall surface can be secured.
Further, according to the configuration of the present invention, since it is made of double glass, heat insulating performance and soundproofing performance can be exhibited as compared with the case of sealing with a sealing sheet such as a back sheet.

  By the way, in recent years, due to the development of flying objects such as drones, the chances of photographing the ground from above by broadcasting on television or the like have increased. Therefore, among companies that perform large-scale power generation using solar cell modules in idle lands and the like, there is a demand that the solar cell modules be used as an advertising medium for informing general viewers of the company.

Therefore, an invention according to claim 8 is a solar cell system having a plurality of the solar cell modules according to any one of claims 1 to 5, wherein the plurality of solar cell modules include a first solar cell. There is a module and a second solar cell module having a buffer layer colored differently from the buffer layer of the first solar cell module. The buffer layer of the second solar cell module has the following (3) or ( The structure of 4) is satisfied, and substantially the entire surface is colored when viewed from the front, and the first solar cell module and the second solar cell module have a predetermined pattern due to a difference in color of the buffer layer. It is a solar cell system lined up.
(3) The buffer layer has a laminated structure including a dye layer and a resin layer.
(4) The buffer layer is a single layer containing a dye component in a resin.

The “color” here includes not only color but also colorless.
The term "different colors" includes shades.
Here, "substantially the entire surface is colored" means that 95% or more of the entire surface is colored.

  According to the configuration of the present invention, since the first solar cell module and the second solar cell module having different colors of the buffer layer are arranged in a predetermined pattern, for example, a company logotype, a symbol mark, and a logo mark are provided. By arranging them in a pattern such as (a combination of a logotype and a symbol mark), a pattern with a sense of unity can be made to emerge when viewed from a distance from a flying object or the like.

  According to the solar cell module, the wall surface forming member, and the solar cell system of the present invention, the buffer layer is provided between the compressive stress layer and the anti-glare layer. The occurrence of natural damage can be suppressed.

It is a perspective view showing the installation situation of the solar cell module in a 1st embodiment of the present invention. It is a perspective view of the solar cell module of FIG. FIG. 3 is a cross-sectional view of the solar cell module taken along line AA of FIG. 2, in which hatching is partially omitted for easy understanding. It is sectional drawing of the solar cell module of 2nd Embodiment of this invention, and a hatching is partially omitted for easy understanding. It is explanatory drawing of the solar cell module of 3rd Embodiment of this invention, (a) is a front view, (b) is a sectional perspective view. It is a perspective view of the solar cell system of a 4th embodiment of the present invention, and has given a dot to the light sensing surface of the 2nd solar cell module. It is sectional drawing of the 2nd solar cell module of FIG. 6, and hatching is partially omitted for easy understanding. FIG. 10 is a perspective view of a solar cell system according to another embodiment of the present invention, in which anti-glare regions are indicated by dots.

  Hereinafter, embodiments of the present invention will be described in detail. In addition, about physical property, it is 25 degrees Celsius and 1 atmosphere conversion.

As shown in FIG. 1, a solar cell module 1 according to a first embodiment of the present invention is a wall forming member that is attached to a wall 4 of a building such as a house or a building, and forms an outer wall of the building. That is, the solar cell module 1 is installed in a vertical posture in which the light receiving surface 7 faces a direction orthogonal to the vertical direction on the wall surface 4 rising substantially perpendicularly to the horizontal plane.
The term “substantially vertical” as used herein includes not only a state of perfect vertical (90 degrees) but also a state inclined at an angle of ± 3 degrees or less with respect to the perfect vertical state. That is, “substantially vertical” refers to a range from −3 degrees to 3 degrees with respect to the vertical state.

The solar cell module 1 in the present embodiment is a single-sided light receiving type solar cell module in which one main surface is a light receiving surface 7 as shown in FIGS. 2 and 3, and a first sealing member as a main constituent member. 2, a solar cell unit 3, an adhesive sealing layer 5, and a second sealing member 6.
As shown in FIG. 3, the first sealing member 2 is a member that configures the light receiving surface 7 that is one main surface of the solar cell module 1, and includes an antiglare layer 10, a buffer layer 11, The first tempered glass layer 12 is laminated.

As shown in the enlarged view of FIG. 3, the anti-glare layer 10 has fine surface irregularities 16 formed on the surface on the light receiving side, and scatters visible light by the surface irregularities 16. That is, the antiglare layer 10 has the surface irregularities 16 formed on the surface on the opposite side to the buffer layer 11, and forms the light receiving surface 7.
The anti-glare layer 10 is a film-shaped or plate-shaped member. In the present embodiment, the surface irregularities 16 are formed by blasting on the surface of a plate-shaped non-tempered glass.
The average thickness of the antiglare layer 10 is preferably 0.05 mm or more and 0.7 mm or less.
Within this range, it is thin enough to be bent and easily elastically deformed, and can be elastically deformed and released to the buffer layer 11 side without breaking when receiving an external impact.
The anti-glare layer 10 has an anti-glare region 15 in which surface irregularities 16 are formed when viewed from the front, and the anti-glare function is exhibited.
In the present embodiment, the anti-glare region 15 is formed on the entire surface of the anti-glare layer 10.
The antiglare layer 10 preferably has a flexural modulus according to JIS K 7171: 2016 (ISO 178: 2010) of 2 GPa or more, and more preferably 60 GPa or more.
The antiglare layer 10 preferably has the bending elastic modulus of 120 GPa or less.
Within these ranges, bending failure in the antiglare layer 10 is unlikely to occur.

The anti-glare area 15 preferably has a 60-degree specular glossiness of 6% or less according to JIS Z 8741: 1997 (corresponding to ISO 2813: 1994 and ISO 7668: 1986).
The anti-glare region 15 preferably has a maximum reflectance of 1% or less when light is incident at an angle of 60 degrees with respect to the normal to the light receiving surface 7.
The anti-glare area 15 has an arithmetic average roughness Ra according to JIS B 0601: 2013 (corresponding to ISO 4287: 1997) of 0.2 μm or more and 1 μm or less, and a maximum height roughness Rz of 5 μm or more and 50 μm or less. Is preferred.
Within these ranges, the solar cell module hardly causes glare and does not dazzle.
The anti-glare region 15 preferably has a crack area per unit area (surface crack area) of less than 1%.
The term “crack” as used herein refers to a crack or a fracture having a depth of about 5 μm or more from the surface of the antiglare layer 10.
Within this range, occurrence of spontaneous destruction can be suppressed.

The buffer layer 11 is a layer for mitigating a physical impact received by the anti-glare layer 10, and is an adhesive layer for bonding the anti-glare layer 10 and the first tempered glass layer 12, as shown in FIG.
The buffer layer 11 is an elastically deformable sheet-like or plate-like member.
The buffer layer 11 is not particularly limited as long as it has transparency and adhesiveness. For example, a thermoplastic resin such as a polyvinyl butyral resin (PVB resin), an ethylene / vinyl acetate copolymer resin (EVA resin), and an ionomer resin can be used.
The buffer layer 11 of the present embodiment is not colored and is colorless and transparent.

The average thickness of the buffer layer 11 is 0.5 mm or more, and preferably 0.8 mm or less. Within this range, the impact received by the antiglare layer 10 can be sufficiently reduced, and the thickness does not become too large.
The average thickness of the buffer layer 11 is preferably equal to or more than the average thickness of the antiglare layer 10.
The buffer layer 11 preferably has a flexural modulus according to JIS K 7171: 2016 (ISO 178: 2010) equal to or less than the flexural modulus of the antiglare layer 10 and less than the flexural modulus of the antiglare layer 10.
The buffer layer 11 more preferably has the bending elastic modulus of 1 GPa or more and 10 GPa or less.
Within this range, the impact received by the antiglare layer 10 can be sufficiently reduced while maintaining the shape.

The first tempered glass layer 12 is made of a plate-like thermally strengthened glass, and includes a first compressive stress layer 20, a first tensile stress layer 21, and a second compressive stress layer 22, as shown in FIG. ing.
The average thickness of the first tempered glass layer 12 is preferably 2.5 mm or more and 4 mm or less. Within this range, sufficient strength can be ensured and the thickness does not become too large.
Each of the first compressive stress layer 20 and the second compressive stress layer 22 of the present embodiment has an average thickness of 1/6 of the average thickness of the first tempered glass layer 12. Thicker than the stress layer.

As shown in FIG. 3, the solar cell unit 3 includes a plurality of solar cells 30 and a wiring member 31 as main components, and the solar cells 30 are connected in series or in parallel via the wiring member 31.
The solar cell 30 is a crystalline solar cell, and in this embodiment, is a crystalline silicon solar cell. That is, the solar cell 30 of the present embodiment uses a semiconductor substrate as a support substrate and has a semiconductor layer laminated on the semiconductor substrate.
The wiring member 31 is a metal wiring that connects between adjacent solar cells 30.

As shown in FIG. 3, the adhesive sealing layer 5 is an adhesive layer that bonds the first sealing member 2 and the second sealing member 6, and is a sealing layer that buries and seals the solar cell 30. .
The adhesive sealing layer 5 is formed by sandwiching the solar cell unit 3 between two transparent sealing materials and thermally sealing the two transparent sealing materials. That is, the adhesive sealing layer 5 has a two-layer structure of the first transparent resin layer 35 and the second transparent resin layer 36.
The adhesive sealing layer 5 of the present embodiment is also a heat insulating layer having heat insulating properties in addition to the above functions.
The transparent resin layers 35 and 36 constituting the adhesive sealing layer 5 are not particularly limited as long as they have transparency, adhesiveness, and sealing properties. For the transparent resin layers 35 and 36, for example, a thermoplastic resin such as an ethylene / vinyl acetate copolymer resin (EVA) can be adopted.
The transparent resin layers 35 and 36 may be made of the same material or different materials.

The second sealing member 6 is a member that seals the solar cell unit 3 together with the first sealing member 2, and includes a second tempered glass layer 40 as shown in FIG.
The second tempered glass layer 40 is made of a plate-like thermally strengthened glass, and includes a third compressive stress layer 41, a second tensile stress layer 42, and a fourth compressive stress layer 43.
The average thickness of the second tempered glass layer 40 is preferably 2.5 mm or more and 4 mm or less. Within this range, sufficient strength can be ensured and the thickness does not become too large.
Each of the third compressive stress layer 41 and the fourth compressive stress layer 43 has an average thickness of 1/6 of the average thickness of the first tempered glass layer 12, which is larger than that of a normal chemically strengthened glass. thick.

  Subsequently, the positional relationship of each part of the solar cell module 1 according to the first embodiment of the present invention will be described.

In the solar cell module 1, as shown in FIG. 3, the space between the first sealing member 2 and the second sealing member 6 is filled with the adhesive sealing layer 5, and the solar cell unit 3 is in the adhesive sealing layer 5. Buried in That is, the first sealing member 2 and the second sealing member 6 are bonded by the adhesive sealing layer 5, and the solar cell unit 3 is sealed by the adhesive sealing layer 5.
The buffer layer 11 is in direct contact with the first compressive stress layer 20 of the first tempered glass layer 12 and is located outside the first tempered glass layer 12 with respect to the solar cell unit 3.
The antiglare layer 10 is in direct contact with the buffer layer 11 and is located outside the buffer layer 11 with respect to the solar cell unit 3.
As described above, the solar cell module 1 includes the anti-glare layer 10, the buffer layer 11, the first tempered glass layer 12, the first transparent resin layer 35, the solar cell 30, and the second transparent resin layer in this order from the light receiving surface 7 side. 36, a cross-sectional structure in which the second tempered glass layer 40 is laminated.

  Subsequently, a description will be given of a positional relationship of each part when the solar cell module 1 according to the first embodiment of the present invention is attached to a wall surface 4 of a building and an outer wall is formed.

As shown in FIG. 1, the solar cell module 1 is attached to an outer surface of a wall surface 4 of a building together with other solar cell modules 1, and the second sealing member 6 is attached to the building with respect to the first sealing member 2. Is located on the side of the wall 4. That is, the light receiving surface 7 formed of the anti-glare layer 10 of each solar cell module 1 forms an outer wall surface of the building.
A plurality of solar cell modules 1 are arranged side by side in a vertical direction and a horizontal direction without gaps on a wall surface 4 of the building, and a wall surface structure is formed.

  According to the solar cell module 1 of the present embodiment, since the anti-glare layer 10 is provided separately from the first tempered glass layer 12, the natural tempering at the time of manufacturing the first tempered glass layer 12 by forming the surface irregularities on the tempered glass. Breakage and potential cracking can be prevented.

  According to the solar cell module 1 of the present embodiment, the buffer layer 11 having an average thickness of 0.5 mm or more is interposed between the first tempered glass layer 12 and the anti-glare layer 10. Therefore, even if an external physical impact is transmitted to the anti-glare layer 10, it is relaxed by the buffer layer 11 and transmitted to the first tensile stress layer 21 beyond the first compressive stress layer 20 of the first tempered glass layer 12. Can be prevented. As a result, occurrence of natural destruction due to external physical impact can be suppressed.

  According to the solar cell module 1 of the present embodiment, since the anti-glare layer 10 that scatters visible light is provided, an anti-glare function can be ensured.

  According to the solar cell module 1 of the present embodiment, since the first tempered glass layer 12 and the second tempered glass layer 40 are provided at intervals in the thickness direction, the solar cell module 1 becomes a double glass and exhibits heat insulation performance and soundproof performance. it can.

  Subsequently, a solar cell module 100 according to a second embodiment of the present invention will be described. In addition, the same configuration as the solar cell module 1 of the first embodiment is denoted by the same reference numeral, and the description is omitted. The same applies hereinafter.

The solar cell module 100 according to the second embodiment of the present invention differs from the first embodiment in the structure of the first sealing member 102.
As shown in FIG. 4, the first sealing member 102 of the second embodiment includes a protective layer 103, an antiglare layer 10, a buffer layer 11, and a first tempered glass layer 12 from the light receiving side. That is, the first sealing member 102 includes the protective layer 103 on the surface of the anti-glare layer 10.
The protective layer 103 is a protective film that covers the surface irregularities 16 of the antiglare layer 10, is located on the outermost surface of the solar cell module 100, and forms the light receiving surface 7.
The surface of the protective layer 103 is smoother than the surface irregularities 16 of the antiglare layer 10.
The average thickness of the protective layer 103 is preferably 1 μm or more and 10 μm or less.
Within this range, a decrease in the antiglare function at the surface irregularities 16 of the antiglare layer 10 can be suppressed while maintaining high impact resistance.
The protective layer 103 is preferably formed of a fluororesin, and polytetrafluoroethylene (PTFE) or the like can be suitably used.

  According to the solar cell module 100 of the present embodiment, since the surface of the anti-glare layer 10 is coated with the protective layer 103, the impact resistance of the surface can be further improved. Further, even if cracks are formed in the antiglare layer 10 during blasting, the cracks can be filled with the protective layer 103, and the cracks can be prevented from expanding.

  Subsequently, a solar cell module 150 according to a third embodiment of the present invention will be described.

The solar cell module 150 according to the third embodiment of the present invention is different from the solar cell module 1 according to the first embodiment in the structure of the antiglare layer 151.
As shown in FIG. 5, the antiglare layer 151 of the third embodiment is partially blasted, and partially has surface irregularities 16. That is, when viewed from the front, the antiglare layer 151 has the antiglare region 15 in which the surface irregularities 16 are formed and the non-glare region 153 in which the surface irregularities 16 are not formed.

The non-glare area 153 is an area that is smoother than the anti-glare area 15 and has no anti-glare function.
The non-glare region 153 preferably has an arithmetic average roughness Ra of 5 nm or less and a maximum height roughness Rz of 50 nm or less. In other words, the non-glare area 153 is smaller than the anti-glare area 15 in both the arithmetic average roughness Ra and the maximum height roughness Rz.
The non-glare area 153 has a higher 60-degree specular gloss than the anti-glare area 15 and has a higher maximum reflectance when light is incident at an angle of 60 degrees with respect to the normal to the light receiving surface 7.

The non-glare region 153 forms a predetermined pattern, and the anti-glare region 15 forms an outline of the predetermined pattern.
The pattern formed by the non-glare region 153 is not particularly limited. Examples of the pattern include a character, a picture, and a figure. To give a more detailed specific example, the pattern includes a company logotype, a symbol mark, a logo mark (a combination of the logotype and the symbol mark), information on the own solar cell module 150 (serial number, year of manufacture). Etc.), geometric patterns, etc.

  According to the solar cell module 150 of the third embodiment, there is an anti-glare region 15 that has been subjected to anti-glare processing and a non-glare region 153 that has not been subjected to anti-glare processing, and the non-glare region 153 has a predetermined pattern. Has formed. Therefore, when the light hits the light receiving surface 7, only the non-glare area 153 shines, and a predetermined pattern appears to be raised. As a result, a solar cell module having an appearance with an unprecedented design property is obtained.

  Subsequently, a solar cell system 200 according to a fourth embodiment of the present invention will be described.

The solar cell system 200 according to the fourth embodiment of the present invention is a large-scale power generation system called a so-called mega-solar, in which a plurality of solar cell modules 201 are arranged side by side on an idle land or the like. That is, as shown in FIG. 6, the solar cell system 200 includes a plurality of solar cell modules 201, and the plurality of solar cell modules 201 are inclined at a predetermined angle with respect to a horizontal plane by a fixing member 203 such as a gantry. Are installed side by side.
Among the solar cell modules 201 constituting the solar cell system 200, there are at least two types of solar cell modules 201a and 201b having different structures of the buffer layer.
The first solar cell module 201a is the same as the solar cell module 1 of the first embodiment, and the buffer layer 11 is colorless and transparent.

7, the structure of the buffer layer 202 is different from that of the first solar cell module 201a, and the second solar cell module 201b has a laminated structure including a resin layer 205 and a dye layer 206.
The resin layer 205 is an elastically deformable transparent resin layer.
As the resin layer 205, the same material as the buffer layer 11 can be used. For example, a thermoplastic resin such as a polyvinyl butyral resin (PVB), an ethylene / vinyl acetate copolymer resin (EVA), or an ionomer resin can be employed.
Note that the resin layer 205 may be a colored and transparent layer containing a dye component in a transparent resin.

The pigment layer 206 is a sheet or film colored and transparent.
The dye layer 206 is not particularly limited as long as the color is different from the color of the buffer layer 11 of the first solar cell module 201a. As the dye layer 206, for example, a color film or a metal thin film having a metallic luster can be adopted.

  In the second solar cell module 201b, when viewed from the front, substantially the entire light receiving surface 7 is colored by the buffer layer 202. That is, in the second solar cell module 201b, the colored buffer layer 202 overlaps at least the solar cell 30 when viewed from the front, making the solar cell 30 difficult to see.

  Subsequently, the positional relationship of each member of the solar cell system 200 according to the fourth embodiment will be described.

When the first solar cell module 201a and the second solar cell module 201b are viewed from the front, the colors of the buffer layers 11 and 202 are both reflected on the appearance.
As shown in FIG. 6, the first solar cell module 201a and the second solar cell module 201b are arranged in a predetermined pattern depending on the color of the buffer layers 11 and 202.
In the solar cell system 200 of the present embodiment, the colored second solar cell modules 201b gather to form a predetermined pattern, and the first solar cell module 201a is arranged around the pattern to form a contour of the pattern. are doing. That is, the second solar cell module 201b forms a pattern together with another adjacent second solar cell module 201b.
The pattern formed by the color difference between the first solar cell module 201a and the second solar cell module 201b is not particularly limited. Examples of the pattern include a character, a picture, and a figure. To give a more specific example, the pattern may be a company's logotype, a symbol mark, a logo mark (a combination of the logotype and the symbol mark), information on the solar cell system 200, a geometric pattern, and the like. is there.

  According to the solar cell system 200 of the fourth embodiment, the first solar cell module 201a and the second solar cell module 201b having different colors of the buffer layers 11 and 202 form a predetermined pattern. Therefore, when viewed from the sky with a flying object or the like, or when viewed from the roof of a building, a predetermined pattern is emphasized, and the solar cell system exhibits an appearance with an unprecedented design.

  According to the second solar cell module 201b of the fourth embodiment, when viewed from the front, the colored buffer layer 202 is colored at least at the portion that overlaps the solar cell 30. The color 202 makes it difficult to see. Therefore, for example, the second solar cell module 201b is used as a wall forming member that forms the outer wall as in the first embodiment, and the color is appropriately set. By doing so, it is possible to present an appearance similar to that of another wall forming member such as a decorative panel, and it is difficult to distinguish the appearance from the solar cell module in appearance.

  In the above-described fourth embodiment, the buffer layer 202 has a laminated structure of the resin layer 205 and the dye layer 206, and is colored by reflecting the color of the dye layer 206. However, the present invention is not limited to this. is not. The buffer layer 202 may be a single layer containing a dye component in a transparent resin.

  In the above-described fourth embodiment, the first solar cell module 201a is colorless and transparent, but the present invention is not limited to this. The first solar cell module 201a may be colored and transparent as long as the color of the buffer layer 11 is different from the color of the buffer layer 202 of the second solar cell module 201b.

  In the third embodiment described above, the predetermined pattern is formed in the non-glare region 153 in one solar cell module 150, but the present invention is not limited to this. One pattern may be formed by combining a plurality of solar cell modules 150 having the non-glare region 153. For example, one pattern may be formed together with another adjacent solar cell module.

In the above-described first to third embodiments, the solar cell modules 1, 100, and 150 are mounted on the wall surface 4 that is substantially perpendicular to the horizontal plane, but the present invention is not limited to this. The solar cell modules 1, 100, and 150 may be attached to a floor, a ceiling, or a roof of a building that is substantially horizontal, or may be a fixture that is inclined with respect to a horizontal plane as shown in FIG. It may be attached to a member.
The term "substantially horizontal" as used herein includes not only a state of perfect horizontal (0 degree) but also a state inclined at an angle of plus or minus 3 degrees or less with respect to the perfect horizontal state. That is, “substantially horizontal” refers to a range from −3 degrees to 3 degrees with respect to the horizontal state.

  In the above-described embodiment, the single-sided light receiving type solar cell modules 1, 100, 150, and 201 having the light receiving surface 7 on one side have been described, but the present invention is not limited to this. It may be a double-sided light receiving type solar cell module in which both sides are light receiving surfaces. In this case, it can be suitably used for windows and veranda handrails.

  In the above-described embodiment, the solar cell 30 is a crystalline solar cell, but the present invention is not limited to this. The solar cell 30 may be another type of solar cell such as a thin-film solar cell. For example, when a thin-film silicon solar cell is used as a solar cell, it is preferable that the first tempered glass layer 12 be a supporting substrate. In this case, the cross-sectional structure in which the antiglare layer 10, the buffer layer 11, the first tempered glass layer 12, the solar cell, the second transparent resin layer 36, and the second tempered glass layer 40 are laminated in this order from the light receiving surface 7 side. Preferably, it is provided.

  The solar cell modules 1, 100, 150, and 201 of the above-described embodiments may be see-through solar cell modules that transmit light in the thickness direction. In this case, it can be suitably used for windows and the like.

  In the embodiment described above, the tempered glass layers 12 and 40 are made of physically tempered glass, but the present invention is not limited to this. The tempered glass layers 12, 40 may be made of chemically tempered glass.

  In the embodiment described above, the second tempered glass layer 40 made of tempered glass is used as the second sealing member 6, but the present invention is not limited to this. A resin sealing sheet may be used as the second sealing member 6.

  In the embodiment described above, the anti-glare processing is performed only on one side, but the present invention is not limited to this. Anti-glare processing may be performed on both sides. For example, the buffer layer 11 and the anti-glare layer 10 may be provided outside the second tempered glass layer 40 with respect to the solar cell 30 as a reference.

  In the above-described embodiments, each constituent member can be freely replaced or added between the embodiments as long as it is included in the technical scope of the present invention.

DESCRIPTION OF SYMBOLS 1, 100, 150 Solar cell module 2, 102 First sealing member 3 Solar cell unit 4 Building wall 5 Adhesive sealing layer 6 Second sealing member 7 Light receiving surface 10, 151 Anti-glare layer 11, 202 Buffer layer 12 First tempered glass layer 15 Anti-glare area 16 Surface unevenness 20 First compressive stress layer 30 Solar cell 31 Wiring member 40 Second tempered glass layer 43 Fourth compressive stress layer 103 Protective layer 153 Non-glare area 200 Solar cell system 201a First solar cell module 201b Second solar cell module 205 Elastic layer 206 Dye layer

Claims (8)

A solar cell module including a first sealing member, a second sealing member, and a solar cell, wherein the solar cell is disposed between the first sealing member and the second sealing member. ,
The first sealing member forms one main surface of the solar cell module, and a first tempered glass layer, a buffer layer, and an antiglare layer are laminated from the solar cell side. Yes,
The first tempered glass layer is made of tempered glass having a compressive stress layer on the surface on the buffer layer side,
The buffer layer has an average thickness of 0.5 mm or more and is elastically deformable,
The solar cell module, wherein the anti-glare layer has a film shape or a plate shape, and has a surface unevenness for scattering visible light formed on a surface opposite to the buffer layer. The anti-glare layer is formed of non-tempered glass, has an average thickness of 0.05 mm or more and 0.7 mm or less,
The solar cell module according to claim 1, wherein the average thickness of the buffer layer is equal to or greater than the average thickness of the antiglare layer. The anti-glare layer has an anti-glare region where the surface irregularities are formed when the first sealing member is viewed from the front,
The anti-glare area has a 60-degree specular gloss according to JIS Z8741: 1997 of 6% or less, and has a maximum reflection when light is incident at an angle of 60 degrees with respect to a normal line of the one main surface. The rate is less than 1%,
3. The solar cell module according to claim 1, wherein the anti-glare region has an arithmetic average roughness Ra according to JIS B 0601: 2013 of 0.2 μm or more and 1 μm or less. 4. The first sealing member has a protective layer that covers the surface irregularities of the antiglare layer,
4. The solar cell module according to claim 1, wherein the protective layer has an average thickness of 1 μm or more and 10 μm or less, and is formed of a fluororesin. 5. The anti-glare layer has an anti-glare region where the surface irregularities are formed and a non-glare region where the surface irregularities are not formed when the first sealing member is viewed from the front,
The solar cell module according to claim 1, wherein the non-glare area forms a predetermined pattern. 6. The buffer layer according to claim 1, wherein the buffer layer satisfies the following configuration (1) or (2), and at least a portion overlapping the solar cell when viewed from the front is colored. 7. Solar module.
(1) The buffer layer has a laminated structure including a dye layer and a resin layer.
(2) The buffer layer is a single layer containing a dye component in a resin. A wall forming member using the solar cell module according to any one of claims 1 to 6, wherein the wall forming member forms an outer wall surface of a building.
The second sealing member has a second tempered glass layer,
The wall forming member, wherein the second tempered glass layer is made of tempered glass having a compressive stress layer on a surface on a side opposite to the solar cell. A solar cell system having a plurality of solar cell modules according to any one of claims 1 to 5,
The plurality of solar cell modules include a first solar cell module and a second solar cell module having a buffer layer colored in a different color from the buffer layer of the first solar cell module,
The buffer layer of the second solar cell module satisfies the following configuration (3) or (4), and is substantially entirely colored when viewed from the front,
The solar cell system, wherein the first solar cell module and the second solar cell module are arranged in a predetermined pattern depending on a color of a buffer layer.
(3) The buffer layer has a laminated structure including a dye layer and a resin layer.
(4) The buffer layer is a single layer containing a dye component in a resin.

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