JP2020036514A - Photovoltaic power generation panel, pavement structure, and wall structure - Google Patents

Abstract

To provide a photovoltaic power generation panel capable of ensuring good power generation performance and running performance even in an actual use environment, a pavement structure, and a wall structure.SOLUTION: A photovoltaic power generation panel (10) includes: a photovoltaic module (13) for converting radiated light into electric power; a translucent support member (15) for transmitting light and having the photovoltaic module (13) attached to one surface thereof; and a surface protection layer (16) formed on the other surface of the translucent support member (15) and transmitting light. The surface protection layer (16) is so configured that fine particles (16b) for scattering light are exposed at least on the surface.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a photovoltaic panel, a pavement structure, and a wall structure.

  In recent years, unlike thermal power generation and nuclear power generation, power generation using renewable energy has been gaining importance. Among renewable energies, photovoltaic power generation is promising because it enables mass production of solar panels and can generate power everywhere on the ground where sunlight can be irradiated. In addition, governments around the world have introduced policies to implement the system, and large-scale photovoltaic power generation facilities have been operated, increasing total power generation, and have achieved results that can withstand long-term operation.

  A solar power generation facility for the purpose of selling power needs to install a large amount of solar panels in a large area, so it is necessary to secure a vast site such as a forest or a vacant lot. On the other hand, even small-scale power generation equipment is often installed on the roof of a house or building because it is necessary to secure a certain amount of sunshine area. However, depending on the situation such as the orientation and shape of the building, it may be difficult to install a solar panel on the roof, or the required amount of power generation may not be obtained.

  Therefore, it has been proposed to dispose solar panels on the road surface in order to secure an installation area. For example, Patent Literature 1 describes a road laying tile in which a cavity is provided inside and a solar cell is held inside by an elastic body. Patent Document 2 describes that a solar cell module having flexibility is attached to a surface of a flexible substrate to form a solar cell module, and the solar cell module is attached to a road surface with an adhesive. I have.

JP-A-2002-118279 JP 2013-038228 A

  However, in the related art of Patent Literature 1, since a cavity is provided inside the tile for laying a road, there is a problem that there is a limit in improving the load-bearing performance and it is difficult to increase the area. In addition, when a plurality of road laying tiles are laid to secure an area for photovoltaic power generation, a step is likely to be generated between the road laying tiles, and it has been difficult to secure good traveling performance.

  Similarly, in the prior art of Patent Document 2, since the solar cell module is attached on the road surface, when the traveling vehicle passes through the area where the solar cell module is laid, impact or noise is generated due to a step, and good traveling performance is secured. It was difficult to do. In addition, the adhesive is exposed at the peripheral portion of the solar cell module, and there is a problem that deterioration and peeling are likely to occur.

  In addition, in the technologies described in Patent Documents 1 and 2, slip performance and the like when a vehicle or a pedestrian travels on a road are not considered, and good power generation performance and running performance are obtained even in an actual use environment. It was difficult to secure.

  In view of the above, the present invention has been made in view of the above-described conventional problems, and provides a solar power generation panel, a pavement structure, and a wall structure capable of securing good power generation performance and running performance even in an actual use environment. The purpose is to provide.

  In order to solve the above problems, a solar power generation panel according to the present invention includes a photovoltaic module that converts irradiated light into electric power, and a translucent panel that transmits the light and is attached to one surface of the photovoltaic module. A support member, and a surface coating layer formed on the other surface of the light-transmitting support member and transmitting the light, wherein the surface coating layer has the light-scattering fine particles exposed at least on the surface. It is characterized by.

  In such a photovoltaic panel of the present invention, the photovoltaic module is attached to the translucent support member to increase the area, and light is scattered by the fine particles of the surface coating layer to be incident on the photovoltaic module. In addition, power can be satisfactorily generated even with light having a small incident angle. This makes it possible to ensure good power generation performance and running performance even in an actual use environment.

  In one embodiment of the present invention, the photovoltaic module has a power generation cell made of amorphous silicon.

  In one embodiment of the present invention, the translucent support member is a substantially plate-shaped member made of polycarbonate.

  In one aspect of the present invention, the fine particles have a particle size in a range of 0.2 to 4.0 mm.

In one embodiment of the present invention, the fine particles include at least one of Al ₂ O ₃ , SiO ₂ , ZrO ₂ , Zr (OH) ₄ , and ZrSiO ₄ .

  Further, the pavement structure of the present invention is characterized by comprising any one of the above-described solar power panels and a hard pavement on which the solar power panels are mounted.

  Further, the wall structure of the present invention is characterized by comprising any one of the above-described solar power panels and a wall surface to which the solar panel is attached.

  According to the present invention, it is possible to provide a photovoltaic power generation panel, a pavement structure, and a wall structure capable of ensuring good power generation performance and running performance even in an actual use environment.

It is a figure explaining 1st Embodiment, FIG.1 (a) is a schematic cross section which shows the structural example of the photovoltaic power generation panel 10, and FIG.1 (b) is the schematic cross section which shows the structural example of the photovoltaic module 13. FIG. FIG. 1C is a schematic cross-sectional view showing a structural example of the surface protective layer 16. It is a flowchart showing the manufacturing method of photovoltaic power generation panel 10 typically. It is a schematic diagram which shows the load-bearing test of the solar power generation panel 10 in a water immersion state. It is a figure which shows the power generation amount measurement test of the photovoltaic power generation panel 10 typically. 4 is a graph showing the relationship between the incident angle of light on the photovoltaic panel 10 and the generated voltage. It is a flowchart showing a manufacturing method of pavement structure 100 in a 2nd embodiment. FIG. 7A is a perspective view illustrating a structural example of a wall structure 200, and FIG. 7B is a schematic cross-sectional view illustrating a structural example of a photovoltaic panel 210. It is.

(1st Embodiment)
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The same or equivalent components, members, and processes shown in the drawings are denoted by the same reference numerals, and the repeated description will be omitted as appropriate. FIG. 1A is a schematic cross-sectional view illustrating a structural example of a photovoltaic power generation panel 10 according to the present embodiment, and FIG. 1B is a schematic cross-sectional view illustrating a structural example of a photovoltaic module 13. (C) is a schematic sectional view showing a structural example of the surface protective layer 16.

  As shown in FIG. 1A, a photovoltaic panel 10 includes an adhesive layer 12, a photovoltaic module 13, an adhesive layer 14, a translucent support member 15 on a hard pavement 11. It has a structure in which the surface protection layer 16 is laminated. In the following description, translucency does not mean that light in the entire wavelength range is transmitted, but means that the wavelength of light required for power generation is transmitted well. For example, although visible as a part of visible light is shaded and colored, infrared light or red light may be satisfactorily transmitted.

  The hard pavement 11 is a pavement made of a material used for a road surface of a road, and is a member that holds the photovoltaic module 13 on a substantially flat surface. The material forming the hard pavement 11 may be any material having hardness and durability that allow pedestrians and vehicles to pass through, and examples include asphalt pavement and concrete pavement. Further, it is preferable to form a heat-insulating pavement by applying a heat-insulating resin or filling a heat-insulating mortar on the upper surface of the pavement. By making the hard pavement 11 a heat-insulating pavement, the amount of heat stored in the hard pavement 11 can be reduced, the temperature rise of the photovoltaic module 13 can be suppressed, and the power generation efficiency can be maintained and the life can be extended. The thickness of the hard pavement 11 must be able to withstand pedestrians and vehicles. It preferably has a thickness of 50 mm or more.

  The adhesive layer 12 is a layer of an adhesive applied on the surface of the hard pavement 11, and is a member for fixing the photovoltaic module 13 on the hard pavement 11. As a material for forming the adhesive layer 12, it is preferable to use a resin material that has electrical insulation properties and is easy to apply. For example, an epoxy resin can be used. The thickness of the adhesive layer 12 is required to secure the mechanical strength by firmly bonding the hard pavement 11 and the photovoltaic module 13 and preferably has a thickness of about 1 to 20 mm.

  The photovoltaic module 13 has a light incident surface and a back surface, and is a member that converts light incident on the light incident surface side into electric energy. The back surface side is fixed to the hard pavement 11 by the adhesive layer 12. In addition, the photovoltaic module 13 is provided with electric wiring (not shown) for extracting a current generated by power generation to the outside, and the electric wiring is extended to the outside of the photovoltaic panel 10. As shown in FIG. 1B, the photovoltaic module 13 has a structure in which both surfaces of a power generation cell 13a are covered with sealing materials 13b and 13c.

  The power generation cell 13a is a member composed of a semiconductor material that converts light into electricity and a wiring layer, and has a structure in which semiconductor materials formed in a plurality of regions are connected in series and / or in parallel by a wiring layer. . The specific material of the power generation cell 13a is not limited, and single crystal silicon, polycrystalline silicon, amorphous silicon, microcrystalline silicon, perovskite crystal, compound semiconductor, organic semiconductor, or the like can be used. The structure of the power generation cell 13a may be a multi-junction type (tandem type) or a quantum dot type.

  The sealing members 13b and 13c are members that have translucency and electrical insulation and seal the front and back surfaces and side surfaces of the power generation cell 13a to prevent moisture and air from entering the power generation cell 13a. As a material constituting the sealing members 13b and 13c, for example, a silicone resin or an epoxy resin can be used.

  The adhesive layer 14 is a layer of an adhesive applied on the light incident surface of the photovoltaic module 13 and is a member for bonding the photovoltaic module 13 and the translucent support member 15. The material forming the adhesive layer 14 is not particularly limited as long as it transmits light and has electrical insulation properties. For example, an epoxy resin can be used. As for the thickness of the adhesive layer 14, it is necessary to secure the mechanical strength by firmly bonding the photovoltaic module 13 and the translucent support member 15, and preferably has a thickness of about several nm to 5 mm.

  The translucent support member 15 is a substantially flat member having translucency, and the rear surface side is fixed to the light incident surface of the photovoltaic module 13 by an adhesive layer 14 to support the photovoltaic module 13 and increase rigidity. Secure. The material constituting the translucent support member 15 is not limited, and a known resin or glass can be used, and examples thereof include an epoxy resin, an acrylic resin, and a polycarbonate resin.

  The surface protection layer 16 is a layer having a light-transmitting property formed on the surface side of the light-transmitting support member 15, and is a layer that constitutes a light incident surface on the outermost surface of the solar panel 10. The surface protection layer 16 has a structure in which fine particles 16b are mixed in a base resin 16a as shown in FIG. 1C, and at least a part of the fine particles 16b is exposed on the surface of the base resin 16a. I have.

As a material constituting the base resin 16a, a material having good translucency, durability, weather resistance, and oil resistance is preferable, and for example, an epoxy resin can be used. The fine particles 16b are made of a material that scatters light and a particle size, and can be made of known glass, ceramic, or the like. In order to generate necessary friction as a road surface and to scatter light well, it is preferable that Al ₂ O ₃ and SiO ₂ are contained as the fine particles 16 b, and the average particle diameter is 0.2 to 4.0 mm. Is preferred. The content ratio of _Al 2 _{O 3} and SiO ₂ in the microparticles 16b, comprises _Al 2 _{O 3} 70 to 80 percent by volume percentage, it is preferable to include a SiO ₂ 20 to 30%.

  FIG. 1A shows an example in which the photovoltaic module 13 and the adhesive layers 12 and 14 are formed in the same area, but the area of the photovoltaic module 13 is made smaller than that of the hard pavement 11 and The periphery including the side surface of the module 13 may be covered with the adhesive layers 12 and 14. By covering the side surfaces of the photovoltaic module 13 with the adhesive layers 12 and 14, the adhesion of the entire photovoltaic panel 10 can be further strengthened, and the photovoltaic module 13 is sealed to prevent intrusion of moisture. You can also.

  When the photovoltaic panel 10 is used as a pavement structure constituting a road surface of a road, deformation of the hard pavement 11 due to heat, a large load when a large vehicle passes, and a friction load when a brake of a traveling vehicle is used. Mechanical stress, such as an impact due to, is applied to the solar panel 10. In order to withstand these mechanical stresses, the photovoltaic module 13 preferably has flexibility and flexibility. Further, it is preferable that power can be generated even with a weak light amount in cloudy weather. In order to satisfy these requirements, it is preferable to use an amorphous silicon thin film for the power generation cell 13a of the photovoltaic module 13, and it is preferable to use a silicone resin as the sealing materials 13b and 13c.

  Moreover, in order to favorably protect and support the photovoltaic module 13, it is preferable to use a polycarbonate resin having excellent durability and impact resistance as the translucent support member 15. The thickness of the translucent support member 15 is preferably about 0.5 to 10 mm, and more preferably about 1 to 8 mm, in order to secure mechanical strength.

  FIG. 2 is a process diagram schematically showing a method for manufacturing the photovoltaic panel 10. First, a photovoltaic module 13 is prepared as shown in FIG. Next, as shown in FIG. 2B, the adhesive layer 14 is applied to the light incident surface side of the photovoltaic module 13 and attached to the back surface of the translucent support member 15. Next, as shown in FIG. 2C, a surface protective layer 16 is formed on the surface of the translucent support member 15. As a method for forming the surface protective layer 16, the base resin 16a may be kneaded with fine particles 16b, applied on the translucent support member 15, and cured. The fine particles 16b may be sprayed on the surface before being applied and cured before curing. Finally, as shown in FIG. 2D, an adhesive layer 12 is applied on the hard pavement 11, and the back side of the photovoltaic module 13 is attached to the hard pavement 11.

  In the present embodiment, the hard pavement 11 is included in the photovoltaic power generation panel 10, but only the photovoltaic power generation panel 10 at a stage before being attached to the hard pavement 11 may be used. In this case, the laminated structure of the photovoltaic module 13, the adhesive layer 14, the translucent support member 15, and the surface protection layer 16 shown in FIG.

  In the photovoltaic panel 10 of the present embodiment, light incident on the surface protection layer 16 passes through the base resin 16a, the translucent support member 15, and the adhesive layer 14 while being partially scattered by the fine particles 16b. The light enters the power generation module 13. The photovoltaic module 13 converts incident light into electric energy and supplies electric power to the outside via electric wiring. An external circuit such as a known secondary battery or a voltage conversion circuit is provided outside the photovoltaic power generation panel 10, and electricity generated by the photovoltaic power generation panel 10 by an external circuit connected to electric wiring is used. Is done.

<Example>
As the photovoltaic module 13, a flexible cell made of an amorphous silicon thin film for the power generation cell 13a and silicone resin for the sealing members 13b and 13c is prepared, and a polycarbonate resin plate of 300 × 300 × 5 mm is prepared as the translucent support member 15. Then, as the hard pavement 11, an asphalt pavement of 300 × 300 × 40 mm was prepared.

Next, about 1 mm of an epoxy resin was applied to the light incident surface of the photovoltaic module 13 as the adhesive layer 14, and the photovoltaic module 13 was attached to the back surface of the translucent support member 15. Next, about 1 mm of an acrylic resin is applied to the surface of the translucent support member 15 as the base resin 16a, and as the fine particles 16b, the content ratio of Al ₂ O ₃ and SiO ₂ is 8: 2 and the average particle diameter is 1 mm. The aggregate was sprayed on the base resin 16a and cured to form the surface protective layer 16. Finally, an epoxy resin was formed on the surface of the hard pavement 11 as the adhesive layer 12 to a thickness of about 2 mm, and the back surface of the photovoltaic module 13 was adhered and cured to obtain a sample of the solar panel 10.

<Adhesion test>
When a wheel tracking test (WT test) was performed using the photovoltaic panel 10 of the obtained sample, no breakage or peeling of the adhesive layers 12, 14 and the surface protective layer 16 was observed. The WT test was performed with a traverse setting such that the load on the test wheel was equivalent to a 5-ton wheel load, and the test wheel passed over almost the entire surface of the 300 mm square specimen.

<Slip resistance test>
When the slip resistance value of the surface protective layer 16 was measured by a BPN method (according to ASTM E303) using a pendulum type slip resistor with rubber, the BPN was 60 or more.

<Durability test>
When a halogen 120W beam lamp was irradiated from a distance of 1m for 6 hours from a distance of 1m in order to withstand weather conditions such as temperature rise in summer or rainy weather, the specimen continued to generate power, and deterioration did not occur. I couldn't see it.

  In addition, when a WT test was performed in a dry state and a completely immersed state, it was confirmed that the sample continued to generate power. FIG. 3 is a schematic diagram illustrating a load-bearing test of the photovoltaic panel 10 in a water immersion state. The photovoltaic panel 10 as a sample is placed in the container 20, water is stored in the container 20 so that the entire photovoltaic panel 10 is immersed in the water 30, and the test wheel 40 is moved along the X axis in the figure. In the direction (left-right direction) and the Y-axis direction (perpendicular to the paper). The surface protection layer 16 of the photovoltaic panel 10 is continuously irradiated with light, and the voltage of the photovoltaic panel 10 is measured via electric wiring (not shown).

  Here, the WT test was performed with the traverse setting such that the load on the test wheel was equivalent to the load of a 5-ton wheel, and the test wheel passed over almost the entire surface of the 300 mm square specimen. The temperature was 20 ° C. and 60 ° C., the loading time was 6 hours, and the test wheel was reciprocated about 7,500 times.

<Dynamic stability test>
Perform a WT test in a dry state at a temperature of 60 ° C, measure the amount of road surface deformation settlement (displacement) 45 minutes and 60 minutes after the start of the test, and pass the test wheels required to displace 1 mm from the displacement When the number was evaluated, it cleared 3000 times / mm or more required for heavy traffic roads. The WT test was performed with a test wheel load (5 ton wheel load equivalent to a large vehicle) and one trajectory reciprocation without traverse.

<Angle dependence test>
FIG. 4 is a diagram schematically illustrating a power generation amount measurement test of the photovoltaic power generation panel 10. The solar panel 10 was placed on a pedestal capable of changing its angle, a xenon light of 1000 W was arranged at a distance of 1 m from the center of the solar panel 10, and the surface protective layer 16 was irradiated with light. A Nisshinbo Solar Simulator (Sun 1040i) was used for the measurement, and three (As1, As2, As3) having the same structure as the above-described specimen and three (3) only having the photovoltaic module 13 as the comparative example ( Nm1, Nm2, Nm3). Table 1 shows the measurement results.

   FIG. 5 is a graph showing the relationship between the incident angle of light on the photovoltaic panel 10 and the generated voltage. As shown in Table 1 and FIG. 5, also in the test samples As1, As2, As3, the same average voltage as that of the comparative examples Nm1, Nm2, Nm3 was obtained. Therefore, even with the photovoltaic panel 10 in which the adhesive layer 14, the translucent support member 15, and the surface protection layer 16 are formed on the photovoltaic module 13, the same good power generation efficiency as the photovoltaic module 13 can be obtained. It can be seen that it can be obtained.

  In the region where the incident angle is 45 degrees or less, the sample As1, As2, As3 has a higher average voltage than the comparative examples Nm1, Nm2, Nm3. This is because, in the specimens As1, As2, and As3, the fine particles 16b are exposed on the surface of the surface protective layer 16, so that the light arriving at a small incident angle is scattered and the light is efficiently taken into the photovoltaic module 13. It shows that it is done.

  As described above, in the photovoltaic power generation panel 10 of the present embodiment, since the fine particles 16b that scatter light are exposed on the surface of the surface protection layer 16, external light is scattered by the 16b satisfactorily, and the incident angle is increased. Can be efficiently converted into electric power by the photovoltaic module 13. Further, the friction coefficient of the surface protection layer 16 is increased by the fine particles 16b exposed on the surface of the surface protection layer 16, and even when the photovoltaic power generation panel 10 is used on a road surface, the traveling vehicle or the pedestrian is prevented from slipping. can do.

  In addition, since the photovoltaic module 13 is disposed below the surface protective layer 16 and the translucent support member 15 with the adhesive layer 14 interposed therebetween, it is possible to prevent external stress from being applied to the photovoltaic module 13 and damage it. Can be suppressed. In addition, by providing the photovoltaic module 13 itself with flexibility and flexibility, damage to the photovoltaic module 13 due to external stress can be further suppressed.

  Further, the photovoltaic power generation panel 10 of the present embodiment has good adhesive strength, weather resistance, slip resistance, load resistance, dynamic stability, and angle dependence of the amount of light emission, so that it can be used in an actual use environment. Good power generation performance and running performance can be ensured.

(2nd Embodiment)
Next, a second embodiment of the present invention will be described. A description of the same contents as in the first embodiment will be omitted. FIG. 6 is a process chart illustrating a method for manufacturing the pavement structure 100 according to the present embodiment.

  First, as shown in FIG. 6A, an existing pavement 110 on which the pavement structure 100 is to be constructed is prepared. The existing pavement 110 may be a paved road that is already in service, or may be a newly constructed paved road. A lane marking 111 or the like may be formed on the surface of the existing pavement 110. The center-to-center distance W1 between the lane markings 111 is a lane width, for example, about 3000 mm.

  Next, as shown in FIG. 6B, the surface of the existing pavement 110 is cut by a depth t1 over a width W3 while leaving a margin W2 from the division line 111 to form a cutting groove 112 (paving cutting step). The margin W2 is, for example, about 50 mm, and the width W3 is, for example, about 2750 m. The depth t1 of the cutting groove 112 is, for example, about 37 mm.

  Next, as shown in FIG. 6C, asphalt 113 having a flat surface is formed as a hard pavement inside the cutting groove 112, and wiring grooves 114 are formed on both sides of the hard pavement 113 (hard pavement forming step). ). A step 115 is formed between the surface of the asphalt 113 and the surface of the existing pavement 110. The thickness t2 of the asphalt 113 is, for example, about 30 mm, and the height t3 of the step 115 is, for example, about 7 mm. The width W4 of the wiring groove 114 is, for example, about 100 mm, and the width of the asphalt 113 is, for example, about 2650 mm.

  Next, as shown in FIG. 6D, an adhesive layer 116 such as a road epoxy resin is applied on the asphalt 113, and the back side of the photovoltaic power generation panel 117 is attached (power generation panel arrangement step). As the structure of the photovoltaic panel 117, a laminated structure of the photovoltaic module 13, the adhesive layer 14, the translucent support member 15, and the surface protective layer 16 shown in FIG. 2C can be used. At the same time, the electric wiring 118 extended from the photovoltaic module 13 is routed in the wiring groove 114, and is electrically connected to another adjacent photovoltaic panel 117, an external circuit, a secondary battery, and the like. Here, two photovoltaic panels 117 are arranged in parallel, and a joint having a width W6 is left between them. The joint width 6 is, for example, about 10 mm.

  Finally, as shown in FIG. 6E, the joints and the wiring grooves 114 are filled with epoxy resin mortar or the like to form filling portions 119 and 120, and the filling is performed between the existing pavement 110 and the photovoltaic panel 117. The surfaces of the parts 119 and 120 are made substantially flush (filling step). Thereby, the pavement structure 100 of the present embodiment is obtained.

  Roads often have no light-blocking structures above, and the sunshine is relatively good. Therefore, by embedding the photovoltaic power generation panel 117 in the pavement structure 100 and using the existing road surface for photovoltaic power generation, it is possible to easily secure a power generation site. Further, even in a remote place, a remote island, a mountainous area, or the like where the power transmission facilities and the like are not prepared, the use of the existing road surface eliminates the need for new land development, thereby further reducing the environmental load.

  Further, the pavement structure 100 of the present embodiment includes a photovoltaic power generation module 13, an adhesive layer 14, a translucent support member 15, and a photovoltaic panel 117 having a laminated structure of a surface protection layer 16. It is fixed with a layer 116. Thus, as described in the first embodiment, the road surface of the pavement structure 100 has good adhesive strength, weather resistance, slip resistance, load resistance, dynamic stability, and angle dependence of the amount of light emission. Also, good power generation performance and running performance can be ensured even in an actual use environment.

  Since the pavement structure 100 is formed substantially horizontally on the horizon, it is extremely rare that sunlight is almost perpendicular to the road surface, and is limited to around noon in midsummer in a low latitude area. Assuming that the period from sunshine time to sunset time is a time zone in which sunlight can be irradiated to generate power, in many areas on the earth, most of the power generation time is less than 45 degrees with respect to the road surface throughout the four seasons. It can be said that this is the time during which light is irradiated at the incident angle. The light that enters the pavement structure 100 is not only light that directly enters from the sun, but also environmentally reflected light that is reflected by buildings and plants, guardrails, soundproof walls, side surfaces of traveling vehicles, and the like existing near roads. Is included. Such environment reflected light is reflected at a low position and enters the pavement structure 100 at a small incident angle.

  In the pavement structure 100 of the present embodiment, as described in the first embodiment, the outermost surface of the photovoltaic panel 117 is the surface protective layer 16, and light is scattered by the fine particles 16b being exposed on the surface. You. As a result, as shown in Table 1 and FIG. 5, even at a small incident angle of 45 degrees or less, a decrease in the amount of power generation is suppressed, good power generation efficiency can be maintained, and the road surface is utilized. It is suitable for solar power generation.

(Third embodiment)
Next, a third embodiment of the present invention will be described. A description of the same contents as in the first embodiment will be omitted. FIG. 7A is a perspective view illustrating a structural example of the wall structure 200 according to the present embodiment. As shown in FIG. 1A, the wall structure 200 of the present embodiment has a photovoltaic panel 210, a support 220, and a wall 230. FIG. 7B is a schematic cross-sectional view illustrating a structural example of the solar panel 210. The photovoltaic panel 210 of the present embodiment has a laminated structure of a photovoltaic module 213, an adhesive layer 214, a translucent support member 215, and a surface protection layer 216.

  The support column 220 is a column-shaped member that stands substantially vertically with respect to the ground, and is a member that supports the wall surface 230. The wall surface 230 is a substantially plate-shaped member attached to the column 220, and the photovoltaic panel 210 is fixed by a fixing member (not shown). The material and structure of the fixing member are not particularly limited, and the fixing member may be fixed by interposing an adhesive layer between the wall surface 230 and the photovoltaic power generation panel 210, and a mechanical fastening structure such as a bolt and a nut is used. Is also good. The specific structures of the column 220 and the wall surface 230 are not limited, and for example, a soundproof wall or a guardrail installed near a road, a wall surface of a building, or the like can be used.

  Also in the wall structure 200 of the present embodiment, as described in the first embodiment, the outermost surface of the photovoltaic panel 210 is the surface protective layer 216, and light is scattered by the fine particles 16b being exposed on the surface. You. Thereby, as shown in Table 1 and FIG. 5, even at a small incident angle of 45 degrees or less, a decrease in the amount of power generation is suppressed, and good power generation efficiency can be maintained. It is suitable for power generation.

  Further, since the photovoltaic module 213 is disposed below the surface protective layer 216 and the translucent support member 215 via the adhesive layer 214, even if an external stress is applied to the wall surface 230, the light Damage to the power generation module 13 can be suppressed. In addition, by giving the photovoltaic module 213 itself flexibility and flexibility, breakage of the photovoltaic module 213 due to external stress can be further suppressed.

  The present invention is not limited to the embodiments described above, and various modifications are possible within the scope shown in the claims, and embodiments obtained by appropriately combining technical means disclosed in different embodiments. Is also included in the technical scope of the present invention.

10, 117, 210 photovoltaic panel 11 hard pavement 12, 14, 214 adhesive layer 13, 213 photovoltaic module 13a power generation cell 13b sealing material 15, 215 translucent support member 16 216 Surface protection layer 16a Base resin 16b Fine particles 100 Pavement structure 110 Existing pavement 111 Partition line 112 Cutting groove 113 Asphalt 113 Hard pavement 114 Wiring groove 115 Step difference 116 Adhesive layer 118 Electric wiring 119 Filling portion 200 Wall structure 220 Column 230 Wall 20 Container 30 Water 40 Test wheel

Claims (7)

A photovoltaic module that converts the irradiated light into electric power,
A light-transmitting support member that transmits the light and has the photovoltaic module attached to one surface thereof,
Formed on the other surface of the translucent support member, comprising a surface coating layer that transmits the light,
The photovoltaic panel, wherein the light-scattering fine particles are exposed on at least the surface of the surface coating layer. The photovoltaic panel according to claim 1,
A photovoltaic panel, wherein the photovoltaic module has a power generation cell made of amorphous silicon. It is a photovoltaic power generation panel according to claim 1 or 2,
The said translucent support member is a substantially plate-shaped member made of polycarbonate, The photovoltaic power generation panel characterized by the above-mentioned. It is a photovoltaic power generation panel according to any one of claims 1 to 3,
The photovoltaic panel, wherein the fine particles have a particle size in a range of 0.2 to 4.0 mm. It is a photovoltaic power generation panel according to claim 4,
The photovoltaic panel, wherein the fine particles include at least one of Al ₂ O ₃ , SiO ₂ , ZrO ₂ , Zr (OH) ₄ , and ZrSiO ₄ . A solar panel according to any one of claims 1 to 5,
A pavement structure comprising a hard pavement on which the solar power generation panel is mounted. A solar panel according to any one of claims 1 to 5,
A wall structure comprising a wall surface on which the solar panel is mounted.