Fixed structure of solar power generation equipment

Abstract

To provide a fixing structure of a photovoltaic power generation device having a photovoltaic power generation device and fixtures for fixing the photovoltaic power generation device which can suppress damage of a peripheral object even if the fixture scatters, can suppress fixing force per unit area applied to the photovoltaic power generation device from the fixtures, and thereby can suppress damage of the photovoltaic power generation device by the fixtures.SOLUTION: A fixing structure 2 of a photovoltaic power generation device 1 includes a photovoltaic power generation device 1, and a plurality of resin fixtures 4 for fixing the photovoltaic power generation device 1 to a fixing object 3. The fixture 4 includes a pressing part 30 having a pressing surface 30a for pressing the photovoltaic power generation device 1 to the fixing object 3 side, and an embedding part 31 which is provided integrally with the pressing part 30 and where a part 31a is embedded in the fixing object 3.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a fixing structure for a solar power generation device, comprising the solar power generation device and a fixture for fixing the solar power generation device.

Background Art

[0002] Conventionally, a solar power generation device has been fixed using a metal fixture. For example, in Patent Document 1, it is disclosed that by sandwiching an end portion of a solar power generation device between a main plate of a pressing metal fitting and a receiving plate of a sandwiching metal fitting and fastening the pressing metal fitting and the sandwiching metal fitting with bolts, the solar power generation device is fixed.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the technique of Patent Document 1 above, since the pressing metal fitting and the sandwiching metal fitting are made of metal, when a strong external force is applied to the solar power generation device due to strong wind or the like and the pressing metal fitting or the sandwiching metal fitting scatters, there is a risk that surrounding objects will be damaged by the scattered pressing metal fitting or sandwiching metal fitting. Also, when fixing a solar power generation device with a metal fixture such as a peg, there is a risk that the solar power generation device will be damaged due to locally generated fixing force.

[0005] The present invention has been made in view of the above matters, and its object is to provide a fixing structure for a solar power generation device, comprising the solar power generation device and a fixture for fixing the solar power generation device, which can suppress damage to surrounding objects even if the fixture scatters and can suppress damage to the solar power generation device by the fixture by keeping the fixing force per unit area applied from the fixture to the solar power generation device small. [Means for solving the problem]

[0006] To achieve the above objectives, the present invention encompasses the subject matter described in the following sections.

[0007] Item 1. A photovoltaic power generation device having a power generation sheet that generates electricity by the incidence of sunlight, The solar power generation device comprises one or more resin fasteners for fixing it to the object to be fixed, The fixing device comprises a pressing portion having a pressing surface for pressing the solar power generation device toward the object to be fixed, and at least one embedded portion provided integrally with the pressing portion and partially or entirely embedded in the object to be fixed.

[0008] Item 2. The buried portion penetrates the solar power generation device in the vertical direction, and the lower part of the buried portion is buried in the fixed object. The aforementioned retaining portion is a fixing structure for the solar power generation device described in item 1, provided at the upper end of the buried portion.

[0009] Item 3. Further comprising a light-shielding member having light-shielding properties, The fixing structure for a photovoltaic power generation device according to item 1 or 2, wherein the pressing portion is covered by the light-shielding member.

[0010] Item 4. The photovoltaic power generation device is equipped with a power generation sheet that generates electricity when light enters from the light-receiving surface. The fixing structure for a photovoltaic power generation device according to any one of items 1 to 3, wherein the bending strength of the power generation sheet is 10 MPa or more and 150 MPa or less.

[0011] Item 5. The fixing structure 2 for the solar power generation device 1 according to any one of claims 1 to 4, wherein the corner between the pressing surface and the side surface of the pressing portion is rounded or chamfered. [Effects of the Invention]

[0012] According to the present invention, since the fixture is made of resin, even if the fixture scatters, damage to the peripheral portion by the fixture can be suppressed.

[0013] Also, according to the present invention, by the pressing portion pressing the photovoltaic power generation device in a planar manner (that is, by the pressing surface of the pressing portion pressing the photovoltaic power generation device), the fixing force per unit area applied from the fixture to the photovoltaic power generation device can be suppressed to be small. Therefore, damage to the photovoltaic power generation device by the fixture can be suppressed.

Brief Description of the Drawings

[0014] [Figure 1] It is a schematic plan view showing a fixing structure of a photovoltaic power generation device according to an embodiment of the present invention. [Figure 2] It is a schematic cross-sectional view taken along line a-a in FIG. 1. [Figure 3] (A) is a schematic cross-sectional view taken along line b-b in FIG. 1, (B) is an enlarged view of part c in (A), and (C) is a cross-sectional view showing a state where the power generation portion is cut along line d-d in (A). [Figure 4] The following diagrams of (A) to (F) are cross-sectional views of the fixture. [Figure 5] (A) to (F) are diagrams showing the fixture. The upper diagrams of (A) to (F) are plan views of the fixture, and the lower diagrams of (A) to (F) are cross-sectional views of the fixture. [Figure 6] (A) is a cross-sectional view of the fixture, and (B) is an enlarged view of part e in (A). [Figure 7] (A) is a cross-sectional view of the fixture, and (B) is an enlarged view of part f in (A). [Figure 8] (A) to (D) are schematic cross-sectional views showing a fixing structure of a photovoltaic power generation device according to a modification example of the present invention. [Figure 9] (A) to (E) are schematic cross-sectional views showing a fixing structure of a photovoltaic power generation device according to a modification example of the present invention. [Figure 10] (A) and (B) are schematic plan views showing a fixing structure of a photovoltaic power generation device according to a modification example of the present invention.

Best Mode for Carrying Out the Invention

[0015] <Embodiment> Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a schematic plan view showing a fixing structure 2 of a photovoltaic power generation device 1 according to an embodiment of the present invention. FIG. 2 is a schematic cross-sectional view taken along line a-a in FIG. 1. FIG. 3(A) is a schematic cross-sectional view taken along line b-b in FIG. 1. FIG. 3(B) is an enlarged view of a portion c in FIG. 3(A). FIG. 3(C) is a cross-sectional view showing a state where the power generation part is cut along line d-d in FIG. 3(A).

[0016] The fixing structure 2 according to the present embodiment includes a photovoltaic power generation device 1 and a plurality of fixing tools 4 for fixing the photovoltaic power generation device 1 to a fixing target 3. In the present embodiment, the case where the fixing target 3 is the ground will be described, but the present invention is not limited to the fixing target 3 being the ground.

[0017] In the present invention, the "photovoltaic power generation device" means a device having a power generation sheet 5 that generates power by the incidence of sunlight. Members provided integrally with the power generation sheet 5 (such as a fiber-containing sheet 51 and an adhesive layer 52 described later) are included in the configuration of the "photovoltaic power generation device". Further, the "sheet" referred to in this specification means a shape in which the thickness of the object is 10% or less with respect to the maximum length between the outer edges in a plan view. When the shape in a plan view is rectangular, the "maximum length between the outer edges in a plan view" means the length of the diagonal line. When the shape in a plan view is circular, the "maximum length between the outer edges in a plan view" means the length of the diameter. In this specification, a film shape, a foil shape, a film shape, etc. are also included in the "sheet shape".

[0018] (Photovoltaic power generation device 1) In the present embodiment, the photovoltaic power generation device 1 includes only the above-described power generation sheet 5. The power generation sheet 5 is formed in a substantially rectangular shape in a plan view. The shape of the power generation sheet 5 may be, for example, a substantially circular shape, an elliptical shape, a polygonal shape, etc. in a plan view, and is not particularly limited.

[0019] As shown in Figure 3(A), the power generation sheet 5 comprises a back sheet 10, a power generation unit 11, a barrier sheet 12, a sealant 13, and a sealing edge material 14. The barrier sheet 12 constitutes the light-receiving surface 6 which makes up most of the upper surface of the power generation sheet 5. The back sheet 10 constitutes most of the lower surface of the power generation sheet 5. The power generation unit 11 and the sealant 13 are arranged between the back sheet 10 and the barrier sheet 12. The sealing edge material 14 seals the space between the outer peripheral edge 15 of the back sheet 10 and the outer peripheral edge 16 of the barrier sheet 12.

[0020] The bending strength of the power generation sheet is preferably 10 MPa to 150 MPa, and more preferably 20 MPa to 50 MPa. The setting of the bending modulus of the power generation sheet 5 can be mainly achieved by the bending strength of the back sheet 10 and the barrier sheet 12. The back sheet 10 and the barrier sheet 12 will be described in detail later. By setting the bending modulus of the power generation sheet 5 to 50 MPa to 150 MPa, it is possible to suppress damage such as cracking while maintaining good workability. The "bending modulus" as used herein is measured, for example, by a measurement method compliant with JIS 7171.

[0021] In this specification, "power generation sheet 5" includes a photovoltaic sheet module having a plurality of power generation units 11, a photovoltaic sheet string having a plurality of photovoltaic sheet modules, and a photovoltaic sheet array having a plurality of photovoltaic sheet strings.

[0022] (Back seat 10) The backsheet 10 has barrier properties against water vapor and protective properties against external forces. The backsheet 10 may be translucent, but is not necessarily required. As used herein, "translucent" means that the light transmittance is 10% or more of the peak wavelength of light before incidence.

[0023] The backsheet 10 is flexible. The material used for the backsheet 10 preferably has a Young's modulus of 100 MPa to 10,000 MPa, and more preferably 1,000 MPa to 5,000 MPa. Specific examples of materials for the backsheet 10 include plastic films and plastic substrates.

[0024] The thickness of the backsheet 10 is preferably 50 μm or more, more preferably 100 μm or more, and more preferably 200 μm or more. Furthermore, the thickness of the backsheet 10 is preferably 1000 μm or less, more preferably 800 μm or less, and more preferably 600 μm or less. A backsheet thickness of 50 μm or more and 1000 μm or less makes it easier to set the flexural modulus of the power generation sheet 5 to 50 MPa or more and 150 MPa or less.

[0025] (Power generation section 11) The power generation unit 11 is a photoelectric conversion element that utilizes the photovoltaic effect and includes a power generation cell 110 that generates electricity when it receives sunlight. In this embodiment, the power generation unit 11 is composed of a photoelectric conversion unit in which a plurality of power generation cells 110 are arranged in the planar direction of the power generation sheet 5 (for example, in the longitudinal direction or width direction of the power generation sheet 5). The power generation unit 11 may also be composed of a single power generation cell 110.

[0026] As shown in Figure 3(A), the power generation cell 110 comprises a translucent substrate 20, a translucent conductive layer 21, a power generation layer 22, and an electrode 23. The translucent substrate 20, the translucent conductive layer 21, the power generation layer 22, and the electrode 23 are laminated in this order along the direction from the barrier sheet 12 toward the back sheet 10. That is, the translucent substrate 20 is positioned facing the barrier sheet 12, and the electrode 23 is positioned facing the back sheet 10.

[0027] (Transparent base material 20) The translucent substrate 20 supports the translucent conductive layer 21, the power generation layer 22, and the electrode 23. The translucent substrate 20 is translucent. The translucency of the translucent substrate 20 is sufficient if the light transmittance is 10% or more relative to the peak wavelength of light before incidence, preferably 50% or more, and more preferably 80% or more. In this specification, a light transmittance of 80% or more relative to the peak wavelength of light before incidence is defined as "transparent".

[0028] Examples of materials for the translucent substrate 20 include inorganic materials, organic materials, and metallic materials. Examples of inorganic materials include quartz glass and alkali-free glass. Examples of organic materials include plastics and polymer films such as polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polyethylene, polyimide, polyamide, polyamide-imide, liquid crystal polymer, and cycloolefin polymer. Examples of metallic materials include stainless steel, aluminum, titanium, and silicon.

[0029] The thickness of the translucent substrate 20 is not particularly limited as long as it can support the translucent conductive layer 21, the power generation layer 22, and the electrodes 23. For example, it can be 30 μm or more and 300 μm or less.

[0030] The translucent substrate 20 is a substrate required in the manufacturing process of the power generation cell 11, but it is not an essential component. The translucent substrate 20 may be used only during the manufacturing process of the power generation sheet 5, or it may be removed after or during manufacturing. If it is removed, a non-translucent substrate may be used in place of the translucent substrate 20.

[0031] (Transparent conductive layer 21) The translucent conductive layer 21 is a conductive layer and functions as a cathode. The translucent conductive layer 21 is translucent. Preferably, the translucent conductive layer 21 is transparent.

[0032] Examples of transparent materials for the translucent conductive layer 21 include indium tin oxide (ITO), fluorine-doped tin oxide (FTO), and NESA film. The translucent conductive layer 21 is formed on the surface of the translucent substrate 20 by methods such as sputtering, ion plating, plating, and coating.

[0033] Furthermore, the translucent conductive layer 21 may be configured to be translucent by forming a light-transmitting pattern while using an opaque material. Examples of opaque materials include platinum, gold, silver, copper, aluminum, rhodium, indium, titanium, nickel, tin, zinc, or alloys containing these. Examples of light-transmitting patterns include lattice patterns, linear patterns, wavy patterns, honeycomb patterns, and circular hole patterns.

[0034] The thickness of the translucent conductive layer 21 is preferably, for example, 30 nm to 300 nm. When the translucent conductive layer 21 is 30 nm to 300 nm thick, good conductivity can be obtained while maintaining high flexibility.

[0035] (Power generation layer 22) The power generation layer 22 is a layer that generates photoelectric conversion upon irradiation with light, producing electrons and holes from excitons generated by absorbing light. As shown in Figure 3(B), the power generation layer 22 comprises a hole transport layer 221, a photoelectric conversion layer 222, and an electron transport layer 223. The hole transport layer 221, the photoelectric conversion layer 222, and the electron transport layer 223 are stacked in this order along the direction from the translucent conductive layer 21 toward the electrode 23.

[0036] (Hole transport layer 221) The hole transport layer 221 extracts holes generated in the photoelectric conversion layer 222 to the translucent conductive layer 21, and prevents electrons generated in the photoelectric conversion layer 222 from moving to the translucent conductive layer 21. For example, a metal oxide can be used as the material for the hole transport layer 221. Examples of metal oxides include titanium oxide, molybdenum oxide, vanadium oxide, zinc oxide, nickel oxide, lithium oxide, calcium oxide, cesium oxide, and aluminum oxide. Other materials that may be used include delafossite compound semiconductors (CuGaO2), copper oxide, copper thiocyanate (CuSCN), vanadium pentoxide (V2O5), and graphene oxide. Furthermore, a p-type organic semiconductor or a p-type inorganic semiconductor can also be used as the material for the hole transport layer 221.

[0037] The thickness of the hole transport layer 221 is preferably, for example, 1 nm to 1000 nm, more preferably 10 nm to 500 nm, and even more preferably 10 nm to 50 nm. If the thickness of the hole transport layer 221 is 1 nm to 1000 nm, hole transport can be achieved.

[0038] (Photoelectric conversion layer 222) The photoelectric conversion layer 222 (photoactive layer) is a layer that converts absorbed light into photoelectric energy. There are no particular restrictions on the material of the photoelectric conversion layer 222 as long as it can convert absorbed light into photoelectric energy. Below, as an example of the photoelectric conversion layer 222, a photoelectric conversion layer using a perovskite compound will be described. The photoelectric conversion layer 222 containing a perovskite compound has the advantage of relatively low dependence of the power generation efficiency on the angle of incident light (hereinafter sometimes referred to as incident angle dependence). As a result, in this embodiment, higher power generation efficiency can be obtained.

[0039] Perovskite compounds are perovskite crystalline structures and structures having similar crystals. Perovskite crystalline structures are represented by the chemical formula ABX3. In this chemical formula, for example, A represents an organic cation, B represents a metal cation, and X represents a halogen anion. However, the A site, B site, and X site are not limited to these.

[0040] There are no particular restrictions on the organic group of the organic cation constituting the A site; examples include alkylammonium derivatives and formamidinium derivatives. The organic cation constituting the A site may be one type or two or more types.

[0041] There are no particular restrictions on the metal of the metal cation constituting the B site; for example, Cu, Ni, Mn, Fe, Co, Pd, Ge, Sn, Pb, Eu, etc. The metal cation constituting the B site may be one type or two or more types.

[0042] There are no particular restrictions on the halogens of the halogen anions that constitute the X site; for example, F, Cl, Br, I, etc. The halogen anions that constitute the X site may be one type or two or more types.

[0043] The thickness of the photoelectric conversion layer 222 is preferably, for example, 1 nm to 100,000 nm, more preferably 5 nm to 50,000 nm, and even more preferably 10 nm to 1,000 nm. When the thickness of the photoelectric conversion layer 222 is 1 nm to 100,000 nm, the photoelectric conversion efficiency is improved.

[0044] (Electron transport layer 223) The electron transport layer 223 extracts electrons generated in the photoelectric conversion layer 222 to the electrode 23 and prevents holes generated in the photoelectric conversion layer 222 from moving to the electrode 23. The electron transport layer 223 preferably contains, for example, either a halogen compound or a metal oxide.

[0045] Examples of halogen compounds include lithium halides (LiF, LiCl, LiBr, LiI) and sodium halides (NaF, NaCl, NaBr, NaI). Examples of elements constituting metal oxides include titanium, molybdenum, vanadium, zinc, nickel, lithium, potassium, cesium, aluminum, niobium, tin, and barium. Furthermore, an n-type organic semiconductor or an n-type inorganic semiconductor can be used as the material for the electron transport layer 223.

[0046] The thickness of the electron transport layer 223 is preferably, for example, 1 nm to 1000 nm, more preferably 10 nm to 500 nm, and even more preferably 10 nm to 50 nm. Electron transport can be achieved if the thickness of the electron transport layer 223 is 1 nm to 1000 nm.

[0047] (electrode 23) Electrode 23 is conductive and functions as an anode. Electrode 23 can extract electrons from the photoelectric conversion layer 222 in response to the photoelectric conversion generated by the photoelectric conversion layer 222. Electrode 23 may be translucent or composed of an opaque material. Examples of materials for electrode 23 include platinum, gold, silver, copper, aluminum, rhodium, indium, titanium, nickel, tin, zinc, or alloys containing these materials.

[0048] (Barrier sheet 12) The barrier sheet 12 is transparent and flexible, and preferably transparent. The barrier sheet 12 has barrier properties against water vapor and protective properties against external forces.

[0049] The material used for the barrier sheet 12 preferably has a Young's modulus of 100 MPa or more and 10,000 MPa or less, and more preferably 1,000 MPa or more and 5,000 MPa or less. Specific examples of materials for the barrier sheet 12 include plastic film, vinyl film, and the like.

[0050] The thickness of the barrier sheet 12 is preferably 50 μm or more, more preferably 100 μm or more, and more preferably 200 μm or more. Furthermore, the thickness of the barrier sheet 12 is preferably 1000 μm or less, more preferably 800 μm or less, and more preferably 600 μm or less. A barrier sheet 12 thickness of 50 μm or more and 1000 μm or less makes it easier to set the flexural modulus of the power generation sheet 5 to 50 MPa or more and 150 MPa or less.

[0051] (Sealant 13) The sealant 13 is filled between the barrier sheet 12 and the back sheet 10 with the power generation layer 22 positioned between them. The sealant 13 prevents water from seeping into the power generation layer 22 from the surrounding area. The sealant 13 is translucent and preferably transparent.

[0052] For example, ethylene vinyl acetate (EVA), polyolefin, butyl rubber, silicone resin, polyvinyl butyral, etc., can be used as the encapsulant 13.

[0053] (Sealing edge material 14) The sealing edge material 14 seals the space between the outer edge 15 of the backsheet 10 and the outer edge 16 of the barrier sheet 12 when multiple power generation cells 110 and sealing agent 13 are arranged between the backsheet 10 and the barrier sheet 12. The outer edge 17 of the power generation sheet 5 is formed by the outer edge of the sealing edge material 14. As shown in Figure 3(A), the sealing edge material 14 includes a first adhesive portion 101, a second adhesive portion 102, and a sealing portion 103 connecting the first adhesive portion 101 and the second adhesive portion 102. The first adhesive portion 101 is adhered to the light-receiving surface 6 of the power generation sheet 5 (the upper surface of the barrier sheet 12). The second adhesive portion 102 is adhered to the lower surface of the power generation sheet 5 (the lower surface of the backsheet 10). The first adhesive portion 101, the sealing portion 103, and the second adhesive portion 102 are formed integrally.

[0054] Examples of materials for the sealing edge material 14 include tape materials made of butyl rubber, silicone rubber, and the like.

[0055] (Effect of power generation sheet 5) When light is shone onto the power generation sheet 5 from the light-receiving surface 6 of the power generation sheet 5, the photoelectric conversion layer 222 of the power generation layer 22 absorbs the light and performs photoelectric conversion, generating electrons and holes in the photoelectric conversion layer 222. These electrons are extracted to the electrode 23 (anode) via the electron transport layer 223, and the holes are extracted to the translucent conductive layer 21 (cathode) via the hole transport layer 221, causing a current to flow from the translucent conductive layer 21 to the electrode 23 (i.e., power generation occurs).

[0056] In the photoelectric conversion unit that constitutes the power generation section 11, an extension portion 23a is provided on the electrode 23 (anode) of each power generation cell 110 (Figure 3(C)). The extension portion 23a of the electrode 23 extends toward the translucent conductive layer 21 (cathode). In two adjacent power generation cells 110, 110, the extension portion 23a of the electrode 23 of one cell 110 is joined to the translucent conductive layer 21 of the other cell 110. Due to this joining, while light is irradiated onto the power generation sheet 5, current flows from the translucent conductive layer 21A at one end of the power generation section 11 (photoelectric conversion unit) to the electrode 23A at the other end of the power generation section 11 (the flow of current is shown by arrows in Figure 3(C)). This current is extracted via a power distribution line (not shown).

[0057] By configuring the power generation unit 11 from the above-mentioned photoelectric conversion unit, the amount of electricity extracted from the power generation unit 11 can be stabilized even if a malfunction occurs in some of the power generation cells 110.

[0058] Alternatively, instead of providing an extension portion 23a on the electrode 23 (anode) of each power generation cell 110, an extension portion extending toward the electrode 23 (anode) may be provided on the translucent conductive layer 21 (cathode) of each power generation cell 110. In this case, for two adjacent power generation cells 110, 110, the extension portion of the translucent conductive layer 21 of one cell 110 is joined to the electrode 23 of the other cell 110. The same effect as described above can be obtained in this way as well.

[0059] Furthermore, when a light-transmitting substrate 20 is provided in the power generation unit 11, it is preferable, from the viewpoint of facilitating the manufacture of the power generation unit 11, to support the light-transmitting conductive layer 21, power generation layer 22, and electrode 23 of each power generation cell 110 on a common light-transmitting substrate 20, as shown in Figure 3(C).

[0060] Furthermore, if the power generation unit 11 is composed of a single power generation cell 110, the current flowing from the electrode 23 to the light-transmitting conductive layer 21 is extracted via a power distribution line.

[0061] The power generation sheet 5 may include multiple power generation units 11. In this case, the multiple power generation units 11 are arranged in the planar direction of the power generation sheet 5 and are electrically connected in series or parallel.

[0062] When the power generation unit 11 is composed of photoelectric conversion units, in order to connect multiple power generation units 11 in series, the translucent conductive layer 21A at the end of one power generation unit 11 and the electrode 23A at the end of the other power generation unit 11 are connected via a power distribution line. When multiple power generation units 11 are connected in parallel, the translucent conductive layers 21A, 21A at the ends of two adjacent power generation units 11, 11 and the electrodes 23A, 23A at the ends of the two adjacent power generation units 11, 11 are connected via power distribution lines.

[0063] Furthermore, when the power generation unit 11 is composed of a single power generation cell 110, in order to connect multiple power generation units 11 in series, the translucent conductive layer 21 of one power generation unit 11 and the electrode 23 of the other power generation unit 11 are connected via a power distribution line. When multiple power generation units 11 are connected in parallel, the translucent conductive layers 21, 21 of two adjacent power generation units 11, 11 and the electrodes 23, 23 of the two adjacent power generation units 11, 11 are connected via power distribution lines.

[0064] Even when the power generation unit 11 is composed of either the photoelectric conversion unit or a single power generation cell 110, the distance between adjacent power generation units 11,11 should be greater than 0 mm, preferably 2 mm or more, more preferably 10 mm or more, and even more preferably 15 mm or more. Furthermore, the distance between adjacent power generation units 11,11 should preferably be 100 mm or less, more preferably 50 mm or more, and even more preferably 20 mm or less.

[0065] (fixture 4) Each of the fixing devices 4 is made of resin and includes a pressing portion 30 having a pressing surface 30a that presses the solar power generation device 1 toward the fixing target 3 (ground), and an embedded portion 31 provided integrally with the pressing portion 30, with a portion 31a embedded in the fixing target 3 (ground). For example, polyethylene, polyvinyl chloride, ABS, polypropylene, PPS, and polycarbonate can be used as the resin forming the fixing device 4.

[0066] In this embodiment, an example is shown in which fixing devices 4 are provided at the four corners and the center of each side of the photovoltaic power generation device 1, but the number and position of the fixing devices 4 are not limited to the illustrated example. Any number of fixing devices 4 can be provided at any position as long as the photovoltaic power generation device 1 can be fixed. From the viewpoint of not reducing the power generation performance of the photovoltaic power generation device 1, it is preferable to provide the fixing devices 4 in an area other than the power generation section 11 of the photovoltaic power generation device 1 (Figure 1). From this viewpoint, for example, the fixing devices 4 are provided in the area of ​​the sealing edge material 14 (Figure 3(A)).

[0067] (Buried section 31) As shown in Figure 2, the buried portion 31 penetrates the solar power generation device 1 in the vertical direction, and the lower portion 31a of the buried portion 31 that extends below the solar power generation device 1 is buried in the fixing target 3 (ground), and a retaining portion 30 is provided at the upper end of the buried portion 31. As described above, when the fixing device 4 is provided within the range of the sealing edge material 14, the buried portion 31 penetrates the sealing edge material 14 (Figure 3) in the vertical direction.

[0068] In this embodiment, the buried portion 31 is cylindrical, but the shape of the buried portion 31 is not particularly limited as long as it can be buried in the object to be fixed 3. For example, the buried portion 31 may be plate-shaped.

[0069] As shown in Figures 4(A) and 4(B), the embedded portion 31 may also comprise a cylindrical or plate-shaped main body portion 32 extending from the pressing portion 30, and one or more protruding portions 33 projecting in an annular shape from the outer circumferential surface of the main body portion 32. When multiple protruding portions 33 are provided, they are spaced apart in the longitudinal direction of the main body portion 32 (Figure 4(A)). When one protruding portion 33 is provided, for example, the protruding portion 33 is provided at the end of the main body portion 32 opposite to the pressing portion 30 (the lower end of the main body portion 32) (Figure 4(B)). Furthermore, when the above-mentioned protruding portions 33 are provided, it is preferable to increase the outer diameter of the protruding portion 33 as it approaches the pressing portion 30 (upper side). In this way, it is possible to achieve both ease of insertion of the embedded portion 31 into the object to be fixed 3 and difficulty in removing the embedded portion 31 from the object to be fixed 3.

[0070] As shown in Figure 4(C), the buried portion 31 may also comprise a cylindrical main body portion 34 extending from the retaining portion 30 and a spiral screw portion 35 formed on the outer circumferential surface of the main body portion 34. In this case, by sequentially screwing the buried portion 31 into the solar power generation device 1 and the object to be fixed 3, the buried portion 31 penetrates the solar power generation device 1 in the vertical direction, and the lower portion 31a of the buried portion 31 is embedded in the object to be fixed 3.

[0071] Furthermore, as shown in Figures 4(D), 4(E), 4(F), and 4(G), the buried portion 31 may also include a cylindrical main body portion 36 extending from the pressing portion 30. This allows for a larger contact area between the buried portion 31 and the object to be fixed 3, thereby improving the force with which the solar power generation device 1 is fixed to the object to be fixed 3 by the fixing device 4.

[0072] Furthermore, as shown in Figure 4(E), the buried portion 31 may further include one or more protrusions 37 that project in an annular shape from the inner circumferential surface of the main body portion 36. Also, as shown in Figure 4(F), the buried portion 31 may include one or more protrusions 38 that project in an annular shape from the outer circumferential surface of the main body portion 36. Also, as shown in Figure 4(G), the buried portion 31 may include one or more protrusions 37, 38 that project in an annular shape from the inner circumferential surface and the outer circumferential surface of the main body portion 36, respectively. By doing so, the force with which the solar power generation device 1 is fixed by the fixing device 4 can be further improved.

[0073] Furthermore, when a protrusion 37 is provided on the inner circumferential surface of the main body portion 36 (Figures 4(E) and 4(G)), it is preferable to provide the protrusion 37 such that its inner diameter decreases as it approaches the pressing portion 30 side (upper side). Furthermore, when a protrusion 38 is provided on the outer circumferential surface of the main body portion 36 (Figures 4(F) and 4(G)), it is preferable to provide the protrusion 38 such that its outer diameter increases as it approaches the pressing portion 30 side (upper side).

[0074] The length L of the buried portion 31 embedded in the fixed object 3 is not particularly limited, but is preferably 10 mm or more, more preferably 25 mm or more, and more preferably 100 mm or more. Furthermore, the length L of the buried portion 31 is preferably 500 mm or less, and more preferably 200 mm or less.

[0075] Furthermore, the buried portion 31 extending from the pressing portion 30 may be formed so that its diameter does not change in the extension direction J, or it may be formed so that its diameter gradually changes in the extension direction J (for example, it may be formed so that the lower end tapers). The above-mentioned "buried portion 31 extending from the pressing portion 30" corresponds to the entire buried portion 31 in the example of Figure 2, or to the main body portions 32, 34, and 36 in the examples of Figures 4(A), 4(B), 4(C), 4(D), 4(E), 4(F), and 4(G). The above-mentioned diameter refers to the diameter or outer diameter of the "buried portion 31 extending from the pressing portion 30" if it is cylindrical or cylindrical, and if the "buried portion 31 extending from the pressing portion 30" is not cylindrical or cylindrical, it refers to the diameter of the circumscribed circle of the cross-section of the "buried portion 31 extending from the pressing portion 30". The above cross-section refers to the cross-section in the direction K perpendicular to the extension direction J of the buried portion 31.

[0076] Furthermore, the diameter of the buried portion 31 extending from the retaining portion 30 is not particularly limited, but is preferably 10 mm or more, and more preferably 25 mm or more. Also, the diameter of the buried portion 31 extending from the retaining portion 30 is preferably 200 mm or less, and more preferably 150 mm or less. If the cross-section of the buried portion 31 changes in the extension direction J, the above diameter refers to the maximum diameter of the "buried portion 31 extending from the retaining portion 30".

[0077] (Pressing part 30) The pressing portion 30 has a diameter at its lower end that is larger than the diameter of the buried portion 31 extending from the pressing portion 30. The lower surface of the pressing portion 30 extends outward from the buried portion 31. The lower surface of the pressing portion 30 constitutes the pressing surface 30a, which presses the upper surface of the photovoltaic power generation device 1 (for example, the upper surface of the sealing edge material 14 or the light-receiving surface 6) toward the object to be fixed 3. As described above, when the fixing device 4 is provided within the range of the sealing edge material 14, the pressing surface 30a is designed to press the upper surface of the sealing edge material 14 toward the object to be fixed 3.

[0078] In this embodiment, the cross-sectional shape of the pressing portion 30 is circular (Figures 1 and 5(A)), but the cross-sectional shape of the pressing portion 30 is not particularly limited as long as it can press down on the solar power generation device 1. For example, the cross-sectional shape of the pressing portion 30 may be hexagonal (Figure 5(B)), a square with pointed corners (Figure 5(C)), a square with rounded corners (Figure 5(D)), a cross shape (Figure 5(E)), or a swastika shape (Figures 1 and 5(F)). The above-mentioned cross-sectional shape of the pressing portion 30 refers to the shape of the cross section of the pressing portion 30 in a direction K perpendicular to the extension direction J of the buried portion 31.

[0079] Furthermore, from the viewpoint of suppressing damage to the photovoltaic power generation device 1 due to the pressing of the pressing portion 30, it is preferable that the corner 30c between the pressing surface 30a and the side surface 30b of the pressing portion 30 be rounded, as shown in Figures 6(A) and 6(B). Alternatively, from a similar viewpoint, as shown in Figures 7(A) and 7(B), the corner 30c between the pressing surface 30a and the side surface 30b of the pressing portion 30 may be chamfered. In the above case, it is preferable that the ratio of the radius of curvature r of the corner 30c to the thickness T of the pressing portion 30 in the extension direction J of the embedded portion 31 (r / T × 100%), or the ratio of the widths t1 and t2 of the chamfers in directions J and K (Figure 7(B)) to the thickness T (t1 / T × 100%, t2 / T × 100%) be 1% or more and 100% or less, more preferably 5% or more and 75% or less, and more preferably 10% or more and 50% or less. The chamfer width t1 mentioned above refers to the chamfer width of the corner 30c in the extension direction J of the buried portion 31, and the chamfer width t2 mentioned above refers to the chamfer width of the corner 30c in the direction K perpendicular to the extension direction J of the buried portion 31. Furthermore, it is preferable that the radius of curvature r or the chamfer widths t1 and t2 be 0.1 mm or more and 15 mm or less, more preferably 0.5 mm or more and 10 mm or less, and even more preferably 1 mm or more and 5 mm or less.

[0080] The diameter of the pressing surface 30a (i.e., the diameter at the lower end of the pressing portion 30) is not particularly limited, but from the viewpoint of pressing the solar power generation device 1 widely against the fixing target 3 with the pressing portion 30, it is preferably 30 mm or more, and more preferably 50 mm or more. Furthermore, the diameter of the pressing surface 30a is preferably 500 mm or less, and more preferably 200 mm or less. Note that the "diameter of the pressing surface 30a" above refers to the diameter or outer diameter of the pressing surface 30a if the shape of the outer edge of the pressing surface 30a is circular or annular, and refers to the diameter of the circumscribed circle of the pressing surface 30a if the shape of the outer edge of the pressing portion 80A is not circular or annular.

[0081] The area of ​​the pressing surface 30a (i.e., the area of ​​the lower surface of the pressing portion 80A) is not particularly limited, but from the viewpoint of firmly and securely pressing the solar power generation device 1 against the fixing object 3 with the pressing surface 30a, it is preferably 650 mm. 2 The above, more preferably 2000 mm 2 That concludes the explanation. Furthermore, the area of ​​the pressing surface 30a is not particularly limited, but is preferably 200,000 mm². 2 The following, more preferably 20,000 mm 2 The following applies:

[0082] The ratio of the "diameter of the pressing surface 30a" to the "diameter of the buried portion 31 extending from the pressing portion 30 (the maximum diameter if the diameter changes in the extension direction J of the buried portion 31)" is not particularly limited, but in order to widely press down on the solar power generation device 1 and fix it to the object to be fixed 3, it is preferable that the "diameter of the pressing surface 30a" be 1.1 times or more, and more preferably 1.8 times or more, than the "diameter of the buried portion 31 extending from the pressing portion 30". Furthermore, it is preferable that the "diameter of the pressing surface 30a" be 2.5 times or less the "diameter of the buried portion 31 extending from the pressing portion 30".

[0083] (Effects and Benefits) According to the fixing structure 2 of this embodiment, since the fixing device 4 is made of resin, even if a strong external force is applied to the solar power generation device 1 due to strong winds or the like and the fixing device 4 is blown away, damage to surrounding components by the fixing device 4 can be suppressed.

[0084] Furthermore, because the pressing portion 30 presses down on the solar power generation device 1 over a surface area (that is, the pressing surface 30a of the pressing portion 30 presses down on the solar power generation device 1), the fixing force per unit area applied to the solar power generation device 1 from the fixing device 4 can be kept small. Therefore, damage to the solar power generation device 1 by the fixing device 4 can be suppressed. In order to reliably obtain this effect, it is preferable that the ratio of the area S2 of the pressing surface 30a of each pressing portion 30 to the area S1 of the upper surface of the solar power generation device 1 (S2 / S1 × 100%) be 0.1% or more, more preferably 1% or more, and even more preferably 5% or more, and that the ratio of the "total area S2 of the pressing surface 30a of all pressing portions 30 provided on the fixing structure 2 ΣS2" to the area S1 of the upper surface of the solar power generation device 1 (ΣS2 / S1 × 100%) be 5% or more, more preferably 10%, and even more preferably 20%.

[0085] Furthermore, in order to reliably obtain the above effects, it is preferable that the ratio (S2 / S4 × 100%) of the area S2 of the pressing surface 30a of each pressing part 30 to the area S4 (S4 = S1 - ΣS3) obtained by subtracting the sum ΣS3 of the area S3 of the power generation section 11 of the solar power generation device 1 from the area S1 of the upper surface of the solar power generation device 1 is 10% or more, more preferably 50% or more, and even more preferably 80% or more. However, it is not necessarily required to adjust the ratio (S2 / S1 × 100%) and the ratio (ΣS2 / S1 × 100%) to the above values, and to adjust the ratio (S2 / S4 × 100%) to the above values, and only one of them may be adjusted.

[0086] (modified version) The present invention is not limited to the embodiments described above and can be modified in various ways. Modifications of the present invention are described below. In the following description, the differences from the above embodiments will be the focus, and common points will be denoted by the same reference numerals and their descriptions will be omitted.

[0087] For example, the fixing structure of the present invention may be modified as shown in Figures 8(A) to 8(D).

[0088] The fixing structure 40 shown in Figure 8(A) further comprises a light-shielding member 50 in addition to the photovoltaic power generation device 1 and fixing device 4 shown in the above embodiment. A light-shielding member 50 is provided for each fixing device 4, and the pressing portion 30 of each fixing device 4 is covered by the light-shielding member 50. For example, a metal such as aluminum can be used as the material for the light-shielding member 50. If the light-shielding member 50 is made of metal, it is fixed to the pressing portion 30 using adhesive or bolts. According to the above fixing structure 40, the light-shielding member 50 blocks light, which prevents the fixing device 4 from deteriorating due to ultraviolet rays contained in the light.

[0089] The fixing structures 41 and 42 shown in Figures 8(B) and 8(C) represent the photovoltaic power generation device 1, which comprises a power generation sheet 5, a fiber-containing sheet 51 positioned on the fixing target 3 (ground) side of the power generation sheet 5, and an adhesive layer 52 that bonds the power generation sheet 5 and the fiber-containing sheet 51. The outer periphery 51a of the fiber-containing sheet 51 extends to the outside of the power generation sheet 5. The pressing portion 30 of each fixing device 4 has a pressing surface 30a that presses the outer periphery 51a of the fiber-containing sheet 51 toward the fixing target 3. The embedded portion 31 of the fixing part penetrates the outer periphery 51a of the fiber-containing sheet 51, and a part 31a of the embedded portion 31 (the lower part of the embedded portion 31) extending from the outer periphery 51a is embedded in the fixing target 3.

[0090] The fiber-containing sheet 51 is a sheet containing fibers. As the fiber-containing sheet 51, a fiber-reinforced sheet in which the fibers are coated with resin, or a nonwoven fabric can be used. In this case, for example, polyethylene, polypropylene, polyester, polylactic acid, polyolefin, asphalt, and silica sand can be used as the material for the fibers to be included in the fiber-containing sheet 51. The tensile strength of the fiber-containing sheet 51 is preferably 1 N / cm or more and 10,000 N / cm or less. The thickness of the fiber-containing sheet 51 is preferably, for example, 0.1 mm or more and 100 mm or less.

[0091] The adhesive layer 52 is a layer that adheres the fiber-containing sheet 51 to the back sheet 10 of the power generation sheet 5 (Figure 3(A)). As the material for the adhesive layer 52, for example, a resin composition containing at least one selected from vinyl acetate resin, ethylene acetate, vinyl resin, epoxy resin, cyanoacrylate resin, acrylic resin, chloroprene rubber, styrene, butadiene rubber, polyurethane resin, silicone resin, and modified silicone resin can be used. The thickness of the adhesive layer 52 is preferably, for example, 0.1 mm or more and 100 mm or less. Furthermore, from the viewpoint of stably maintaining the bond between the fiber-containing sheet 51 and the back sheet 10 via the adhesive layer 52, it is preferable that the shear peel strength between the fiber-containing sheet 51 and the back sheet 10 via the adhesive layer 52 be 0.1 N / cm or more (the above shear peel strength is a value measured by the method of JIS K6850).

[0092] According to the above-described fixing structures 41 and 42 (Figures 8(B) and 8(C)), sunlight is blocked by the fiber-containing sheet 51, which prevents plants from growing on the fixing target 3 (ground).

[0093] In the fixing structure 41 shown in Figure 8(B), the pressing portion 30 of each fixing device 4 is covered with the material 53 (soil) that constitutes the fixing target 3 (ground) in order to prevent deterioration of each fixing device 4 due to light. In the fixing structure 42 shown in Figure 8(C), the pressing portion 30 of each fixing device 4 is covered with a light-shielding member 50, similar to the fixing structure 40 (Figure 8(A)), in order to prevent deterioration of each fixing device 4.

[0094] Furthermore, the present invention is not limited to the resin-containing sheet 51 described above as the sheet other than the power-generating sheet 5 provided in the photovoltaic power generation device 1. Other sheets different from the power-generating sheet 5 and the resin-containing sheet 51 may also be provided in the photovoltaic power generation device 1.

[0095] In the fixing structure 43 shown in Figure 8(D), a portion 31a (the lower part of the buried portion 31) of the buried portion 31 extending from the solar power generation device 1 is embedded in concrete 54 provided in the object to be fixed 3 (ground). With the fixing structure 43, because the buried portion 31 is embedded in concrete 54, the solar power generation device 1 can be stably fixed by the fixing device 4 even if the object to be fixed 3 is soft ground. In the fixing structure, it is preferable to use a fixing device 4 equipped with a screw portion 35 as shown in Figure 4(C). In this case, the fixing device 4 is embedded in the concrete 54 by screwing it into a screw hole formed in the concrete 54.

[0096] In addition, in the fixing structures 40, 41, and 42 shown in Figures 8(A), 8(B), and 8(C), similar to the fixing structure 43 (Figure 8(D)) described above, a portion 31a (the lower part of the buried portion 31) of the buried portion 31 extending from the solar power generation device 1 may be embedded in concrete 54 provided in the fixing target 3 (ground).

[0097] Furthermore, the fasteners provided by the fixing structure of the present invention are not limited to the fastener 4 described above, but can be various resin fasteners capable of fixing the solar power generation device 1.

[0098] For example, the resin fastener provided in the fixing structure of the present invention may have an embedded portion 72 that does not penetrate the solar power generation device 1, as shown in Figure 9.

[0099] The fixing structures 60, 61, 62, 63, and 64 shown in Figures 9(A), 9(B), 9(C), 9(D), and 9(E) are modified versions of the fixing structures 2, 40, 41, 42, and 43 shown in Figures 2, 8(A), 8(B), 8(C), and 8(D), respectively, with changes to the fixing devices. These fixing structures 60, 61, 62, 63, and 64 are provided with a fixing device 70 having an L-shaped cross-section. In this fixing device 70, an embedded portion 72 extends from one side of the width of the pressing portion 71, and the lower surface of the other side of the width of the pressing portion 71 constitutes a pressing surface 71a that presses the solar power generation device 1 against the fixing target 3. In the fixing structures 60, 61, and 64 shown in Figures 9(A), 9(B), and 9(E), the fixing device 70 is positioned so that the buried portion 72 follows the outer surface of the power generation sheet 5, and part or all of the buried portion 31 is embedded in the object to be fixed 3 (in detail for fixing structure 64 in Figure 9(E), part or all of the buried portion 72 is embedded in the concrete 54 in the object to be fixed 3). In the fixing structures 62 and 63 shown in Figures 9(C) and 9(D), the fixing device 70 is positioned so that the buried portion 72 follows the outer surface of the fiber-containing sheet 51, and part or all of the buried portion 72 is embedded in the object to be fixed 3. The fixing device 70 may be configured such that multiple buried portions 72 extend from one side of the width of the pressing portion 71. In this case, in the fixed structures 60, 61, and 64, one buried portion 72 is aligned with the outer surface of the power generation sheet 5, while in the fixed structures 62 and 63, one buried portion 72 is aligned with the outer surface of the fiber-containing sheet 51.

[0100] In the fixing structures 60, 61, 62, 63, and 64, one or more fixing devices 70 having the above-described characteristics may be provided. When multiple fixing devices 70 are provided, for example as shown in Figure 10(A), the fixing devices 70 are provided at the corners or intermediate positions of the sides of the photovoltaic power generation device 1. When only one fixing device 70 is provided, for example as shown in Figure 10(B), the fixing device 70 surrounds the outer perimeter of the photovoltaic power generation device 1.

[0101] In the illustrated example, the planar shape of the pressing portion 71 is a polygonal shape with sharp corners or a rectangular ring (Figures 10(A) and 10(B)), but the planar shape of the pressing portion 71 may be a polygonal shape with rounded corners or a rectangular ring. Furthermore, the corner 71c between the pressing surface 71a and the side surface 71b of the pressing portion 71 (Figures 9(A) to 9(E)) is preferably rounded or chamfered, similar to the examples shown in Figures 6 and 7.

[0102] Figure 9 shows an example in which a plate-shaped embedded portion 72 is provided on the fixing device 70. However, in addition to the plate-shaped main body portion extending from the pressing portion 71, the embedded portion 72 may also have one or more protrusions protruding from the outer circumferential surface of the main body portion, similar to the protrusions 33 shown in Figures 4(A) and 4(B). Furthermore, if the above-mentioned protrusions are provided, it is preferable to increase the outer diameter of the protrusions towards the pressing portion 71 side (upper side).

[0103] For example, the buried portion 72 may also include a cylindrical main body portion extending from the retaining portion 71, similar to the main body portion shown in Figures 4(D) to 4(G). In this case, the buried portion 72 may further include one or more protruding portions that project in an annular manner from the inner and / or outer circumferential surfaces of the main body portion.

[0104] For example, the fastener 70 shown in Figure 10(B) may have multiple buried portions extending from an annular retaining portion 71 arranged along the outer circumference of the solar power generation device 1. The multiple buried portions are provided at intervals in the circumferential direction of the retaining portion 71 and may have shapes such as cylindrical, plate-like, or similar shapes to the buried portions 31 shown in Figures 4(A), 4(B), 4(D), 4(E), 4(F), and 4(G).

[0105] Furthermore, the fastener 70, like the fastener 4, is formed using a resin such as polypropylene, polyvinyl chloride, or polyphenylene sulfide. From the viewpoint of weather resistance, the color of the fastener 70 is preferably black.

[0106] Furthermore, although the above embodiment shows an example where the fixing target 3 is the ground, the fixing target 3 may also be a structure such as a roofing material. Examples of the roofing material include corrugated metal roofs, slate roofs, roof decks, standing seam roofs, etc. The roofing material may be laid vertically or horizontally. When the fixing target 3 is a structure, the fixing device 4 comprises a pressing portion having a pressing surface that presses the solar power generation device 1 against the structure (fixing target 3), and at least one embedded portion provided integrally with the pressing portion and partially or entirely embedded in the structure (fixing target 3).

[0107] Furthermore, in the above embodiment, a photovoltaic power generation device having a photoelectric conversion layer containing a perovskite compound was described as one form of photovoltaic power generation device, but in the present invention, a photovoltaic power generation device having equivalent flexibility can be used.

[0108] Furthermore, the photoelectric power generation device equipped with the fixed structure of the present invention may be provided with a photoelectric conversion layer containing amorphous silicon or a non-silicon material (semiconductor material CIGS) instead of the photoelectric conversion layer 222 containing the perovskite compound described above. Including a perovskite compound in the photoelectric conversion layer allows for high power generation efficiency because the dependence of the power generation efficiency of the perovskite compound on the angle of incident light is relatively low. The photoelectric conversion layer may also be a tandem-type laminated structure combining several of the perovskite compound, amorphous silicon, and non-silicon materials. In photoelectric conversion layers using non-silicon materials, semiconductor material CIGS containing copper (Cu), indium (In), gallium (Ga), and selenium (Se) is used, making it easier to reduce the thickness of the photoelectric conversion layer.

[0109] Furthermore, in order to prevent damage to surrounding objects by the fastener 4 when the fastener 4,70 is scattered, the fastener 4,70 may be formed using a lightweight metal or porous metal that is less likely to damage surrounding objects. The metal used to form the fastener 4,70 can be appropriately selected according to the safety standards of the installation location. By selecting a metal, the fastener 4,70 can be made smaller and thinner, which may allow for lighter and smaller fasteners compared to manufacturing the fastener 4,70 using resin alone.

[0110] When metal is used to form the fasteners 4 and 70, the strength and weather resistance of the fasteners 4 and 70 themselves can also be improved.

[0111] Another means of improving the strength of the fastener 4.70 is to use a composite reinforced material containing reinforcing fibers within the resin for the material of the fastener 4.70.

[0112] The material of the reinforcing fibers included in the composite reinforcing material described above is not particularly limited, and examples include glass fibers, carbon fibers, aramid fibers, metal fibers, etc. The fiber content is preferably 5% or more in volume, more preferably 15% or more, and even more preferably 30% or more. This allows the fasteners 4,70 to have appropriate strength. On the other hand, by setting the reinforcing fiber content to 80% or less in volume, more preferably 70% or less, and even more preferably 60% or less, moldability can be provided. The average fiber length of the reinforcing fibers is preferably 100% or less, more preferably 75% or less, and more preferably 50% or less of the diameter of the pressing portion 30,71 (or the maximum diameter if the diameter of the pressing portion 30,71 changes in the stretching direction J). The diameter of the pressing portion 30,71 described above refers to the diameter of the cross-sectional shape of the pressing portion 30,71 if it is circular, and if the cross-sectional shape of the pressing portion 30,71 is not circular, it refers to the diameter of the circumscribed circle of the cross-section of the pressing portion 30,71.

[0113] Furthermore, the fixed structure of the present invention may be equipped with a device that converts light energy into energy other than electricity, instead of a solar power generation device. Examples of such devices include a photothermal heating sheet (solar-driven thermoelectric conversion device) that converts light energy into thermal energy. [Explanation of symbols]

[0114] 1. Solar power generation system 4,70 Fixtures 6 Photosensitive surface 11 Power generation sheet 30,71 Pressing part 30a, 71a Pressing surface of the pressing part 30b Peripheral edge of the pressing surface 31,72 Buried section 31a Lower part of the buried section 50 Light-shielding material

Claims

1. A solar power generation device having a power generation sheet that generates electricity when sunlight enters it, One or more resin fasteners for fixing the aforementioned solar power generation device to the object to be fixed, Light-shielding member having light-shielding properties and Equipped with, The fixing device comprises a pressing portion having a pressing surface for pressing the solar power generation device toward the object to be fixed, and at least one embedded portion provided integrally with the pressing portion and partially or entirely embedded in the object to be fixed. The aforementioned retaining portion is a fixing structure for a solar power generation device that is covered by the light-shielding member.

2. The buried portion penetrates the solar power generation device in the vertical direction, and the lower part of the buried portion is embedded in the object to be fixed. The fixing structure for a solar power generation device according to claim 1, wherein the retaining portion is provided at the upper end of the buried portion.

3. The fixing structure for a photovoltaic power generation device according to claim 1, wherein the bending strength of the power generation sheet is 10 MPa or more and 150 MPa or less.

4. The fixing structure for a solar power generation device according to claim 1, wherein the corner between the pressing surface and the side surface of the pressing portion is rounded or chamfered.

Images