Fastener and storage structure of solar power generation device

Abstract

To provide a storage structure of a solar power generation device which can inhibit the solar power generation device from being bent by wind hitting a surface of the solar power generation device.SOLUTION: A storage structure 1 of the invention includes: a solar power generation device 2; and a hard member 3 attached to an end 2a of the solar power generation device 2. The solar power generation device 2 is wound in a roll form so that the end 2a attached to the hard member 3 forms a tip of an outermost periphery.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a fixture for fixing a photovoltaic power generation device and a storage structure for a photovoltaic power generation device.

Background Art

[0002] Conventionally, a photovoltaic power generation device that generates electricity by the incidence of sunlight (for example, Patent Document 1) has been used, and until the photovoltaic power generation device is fixed to the installation surface, the photovoltaic power generation device has been stored in a spread state.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] When storing and installing the above-mentioned photovoltaic power generation device in a spread state, the surface of the photovoltaic power generation device may be exposed to wind, resulting in bending of the photovoltaic power generation device. When such bending occurs, creases may occur that degrade the appearance of the photovoltaic power generation device. In addition, when the photovoltaic power generation device has a multi-layer structure, damage due to delamination may occur in the photovoltaic power generation device. In particular, in high-altitude work, the work place is often narrow, so the number of workers is limited, and there are few shelters to suppress wind, so the above problems are very serious.

[0005] The present invention has been made in view of the above matters, and its object is to provide a storage structure for a photovoltaic power generation device capable of suppressing bending of the photovoltaic power generation device due to wind hitting the surface of the photovoltaic power generation device.

[0006] Another object of the present invention is a construction method for fixing a photovoltaic power generation device provided with the above storage structure to an installation surface, which suppresses bending of the photovoltaic power generation device caused by wind hitting the surface of the photovoltaic power generation device, and provides a construction method capable of fixing the photovoltaic power generation device to the installation surface.

Means for Solving the Problems

[0007] To achieve the above object, the present invention includes the subject matter described in the following items.

[0008] Item 1. A photovoltaic power generation device, and a rigid member attached to an end of the photovoltaic power generation device, wherein the photovoltaic power generation device is a storage structure of a photovoltaic power generation device wound in a roll shape such that the end to which the rigid member is attached forms the tip of the outermost circumference.

[0009] Item 2. The storage structure of the photovoltaic power generation device according to Item 1, wherein the bending strength of the photovoltaic power generation device is 10 MPa or more and 200 MPa or less.

[0010] Item 3. The storage structure of the photovoltaic power generation device according to Item 1 or 2, wherein the bending modulus of the photovoltaic power generation device is 500 MPa or more and 10,000 MPa or less.

[0011] Item 4. The storage structure of the photovoltaic power generation device according to any one of Items 1 to 3, wherein the bending radius of the photovoltaic power generation device is 10 cm or less.

[0012] Item 5. The storage structure of the photovoltaic power generation device according to any one of Items 1 to 4, wherein the rigid member is detachably attached to an end of the photovoltaic power generation device.

[0013] Item 6. The storage structure of the photovoltaic power generation device according to any one of Items 1 to 5, wherein the photovoltaic power generation device includes a core material around which it is wound in a roll shape.

[0014] Item 7. Comprising a rod-shaped member, The rod-shaped member includes the core material, a first protruding portion that protrudes in the longitudinal direction of the core material from one end in the longitudinal direction of the core material, and a second protruding portion that protrudes in the longitudinal direction of the core material from the other end in the longitudinal direction of the core material. The first protruding portion and the second protruding portion are the storage structure of the solar power generation device according to item 6 that are exposed outside the rolled solar power generation device.

[0015] Item 8. It includes an annular member. The annular member includes the core material and a bent or curved portion that extends from one end in the longitudinal direction of the core material to the other end in the longitudinal direction of the core material and forms an annular shape together with the core material. The bent portion is the storage structure of the solar power generation device according to item 6 that is exposed outside the rolled solar power generation device.

[0016] Item 9. It includes a bent member joined to the bent portion so as to protrude outside the annular member. The bent member presents a bent or curved shape from a first position to a second position in the bent portion. The bent member is the storage structure of the solar power generation device according to item 8 that is exposed outside the rolled solar power generation device.

[0017] Item 10. The bent member is provided at a position facing the core material in a direction orthogonal to the longitudinal direction of the core material in the storage structure of the solar power generation device according to item 9.

[0018] Item 11. It includes a hollow exterior material. The storage structure of the solar power generation device according to any one of items 1 to 10, in which the rolled solar power generation device is accommodated inside the exterior material.

[0019] Item 12. The exterior material has an insertion portion that is inserted into the cavity at the center of the rolled solar power generation device in the storage structure of the solar power generation device according to item 11.

[0020] Item 13. The hard member extends over the entire width of the photovoltaic power generation device, and is the storage structure of the photovoltaic power generation device according to any one of Items 1 to 12.

[0021] Item 14. The photovoltaic power generation device has flexibility, and is the storage structure of the photovoltaic power generation device according to any one of Items 1 to 13.

[0022] Item 15. A construction method for fixing a photovoltaic power generation device provided with the storage structure according to any one of Items 1 to 14 to an installation surface, fixing the hard member to the installation surface while the photovoltaic power generation device is wound in a roll shape; unrolling and spreading the roll-shaped photovoltaic power generation device; and a construction method having at least a step of fixing the spread photovoltaic power generation device to the installation surface.

Effect of the Invention

[0023] According to the storage structure of the present invention, it is possible to suppress the occurrence of bending in the photovoltaic power generation device due to wind hitting the surface of the photovoltaic power generation device.

[0024] According to the construction method of the present invention, it is possible to fix the photovoltaic power generation device to the installation surface while suppressing the occurrence of bending in the photovoltaic power generation device due to wind hitting the surface of the photovoltaic power generation device.

Brief Description of the Drawings

[0025]

Figure 1

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Figure 10

Figure 11

Figure 12

Mode for Carrying Out the Invention

[0026] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1(A) is a plan view showing a storage structure 1 of a photovoltaic power generation device 2 according to an embodiment of the present invention. FIG. 1(B) is a cross-sectional view showing a state in which the storage structure 1 according to the embodiment of the present invention is cut along line A-A of FIG. 1(A).

[0027] The storage structure 1 according to the embodiment of the present invention includes a photovoltaic power generation device 2 and a rigid member 3 fixed to an end portion 2a of the photovoltaic power generation device 2. The photovoltaic power generation device 2 is wound in a roll shape such that the end portion 2a to which the rigid member 3 is fixed becomes the outermost tip portion.

[0028] (Photovoltaic power generation device 2) FIG. 2(A) is a cross-sectional view showing a state in which the photovoltaic power generation device 2 is cut. FIG. 2(B) is an enlarged view of part a in FIG. 2(A). FIG. 2(C) is a cross-sectional view showing a state in which the power generation unit 10 is cut along line A-A of FIG. 2(A).

[0029] The photovoltaic device 2 has a power generation unit 10 and a sealing agent 11 disposed between a barrier sheet 5 and a back sheet 6, and the sealing agent 11 is filled around the power generation unit 10. A sealing edge material 12 for sealing between the outer peripheral edge of the barrier sheet 5 and the outer peripheral edge of the back sheet 6 is provided at the outer peripheral edge of the photovoltaic device 2. The photovoltaic device 2 generates electricity in the power generation unit 10 when the light irradiated on the outer surface 7 of the barrier sheet 5 enters the power generation unit 10.

[0030] The photovoltaic device 2 has a sheet shape. As used herein, the "sheet shape" 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. For example, 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. Further, for example, 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".

[0031] The photovoltaic device 2 is formed in a substantially rectangular shape in a front view. However, the present invention does not particularly limit the shape of the photovoltaic device 2, and the photovoltaic device 2 may be, for example, substantially circular in a plan view, elliptical in a plan view, polygonal in a plan view, or the like.

[0032] The photovoltaic device 2 has flexibility (the property that an object can be bent). In the present invention, that the photovoltaic device 2 has flexibility means that the photovoltaic device 2 has a flexural strength of 10 MPa or more, or that the photovoltaic device 2 has a flexural modulus of 100 MPa or more. The flexural strength of the photovoltaic device 2 is more preferably 20 MPa or more, and more preferably 50 MPa or more. Also, the flexural strength of the photovoltaic device 2 is preferably 200 MPa or less, more preferably 150 MPa or less, and more preferably 50 MPa or less. Also, the flexural modulus of the photovoltaic device 2 is more preferably 500 MPa or more. Also, the flexural modulus of the photovoltaic device 2 is preferably 10,000 MPa or less, more preferably 5,000 MPa or less. When evaluating the flexibility of the photovoltaic device 2 by flexural strength, the flexural modulus may not be within the above range. When evaluating the flexibility of the photovoltaic device 2 by flexural modulus, the flexural strength may not be within the above range. The measuring methods for the flexural strength and flexural modulus of the photovoltaic device 2 are measured in accordance with JIS K 7171. The bending radius of the photovoltaic device 2 is preferably 10 cm or less, and the bending radius of the photovoltaic device 2 is measured using an R caliper (radius measuring instrument) or the like.

[0033] (Backsheet 6) The backsheet 6 has barrier performance against water vapor and protective performance against external forces. The backsheet 6 may have translucency, but translucency is not necessarily required. As used herein, "having translucency" means that the light transmittance is greater than 15% with respect to the peak wavelength of the light before incidence. Examples of the material of the backsheet 6 include synthetic resins such as thermoplastic resins, thermosetting resins, general-purpose plastics, engineering plastics, vinyl resins (e.g., polyvinyl chloride), natural resins, rubbers, metals, carbon, pulp, and the like.

[0034] The longitudinal elastic modulus of the backsheet 6 is preferably 2400 MPa or more, more preferably 3000 MPa or more. Also, the longitudinal elastic modulus of the backsheet 6 is preferably 4200 MPa or less, more preferably 3100 MPa or less. Examples of the material of the backsheet 6 include synthetic resins such as thermoplastic resins, thermosetting resins, general-purpose plastics, engineering plastics, and vinyl resins (e.g., polyvinyl chloride). In addition to synthetic resins, for example, natural resins, rubbers, metals, carbon, pulp, etc. may be used as the material of the backsheet 6.

[0035] The thickness of the backsheet 6 is preferably 50 μm or more, more preferably 100 μm or more. Also, the thickness of the backsheet 6 is preferably 2000 μm or less, more preferably 1000 μm or less.

[0036] (Power generation unit 10) The power generation unit 10 includes a power generation cell 20 which is a photoelectric conversion element utilizing the photovoltaic effect. In the present embodiment, the power generation unit 10 is composed of a photoelectric conversion unit in which a plurality of power generation cells 20 are arranged in the plane direction of the solar power generation device 2 (e.g., the longitudinal direction or the width direction of the solar power generation device 2). Note that the power generation unit 10 may be composed of a single power generation cell 20.

[0037] (Power generation cell 20) The power generation cell 20 includes a light-transmissive substrate 21, a light-transmissive conductive layer 22, a power generation layer 23, and an electrode 24. The light-transmissive substrate 21, the light-transmissive conductive layer 22, the power generation layer 23, and the electrode 24 are laminated in this order along the direction from the barrier sheet 5 toward the backsheet 6. That is, the light-transmissive substrate 21 faces the barrier sheet 5, and the electrode 24 faces the backsheet 6.

[0038] (Light-transmissive substrate 21) The light-transmissive substrate 21 supports the light-transmissive conductive layer 22, the power generation layer 23, and the electrode 24. The light-transmissive substrate 21 has light-transmittance. The light-transmittance of the light-transmissive substrate 21 only needs to be greater than 15% with respect to the peak wavelength of the light before incidence, but is preferably 50% or more, and more preferably 80% or more. In this specification, when the light-transmittance is 80% or more with respect to the peak wavelength of the light before incidence, it is regarded as "transparent".

[0039] Examples of the material of the light-transmissive substrate 21 include inorganic materials, organic materials, metal materials, etc. Examples of the inorganic materials include quartz glass, non-alkali glass, etc. Examples of the organic materials include plastics such as polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polyethylene, polyimide, polyamide, polyamideimide, liquid crystal polymer, cycloolefin polymer, and polymer films. Examples of the metal materials include stainless steel, aluminum, titanium, silicon, etc.

[0040] The thickness of the light-transmissive substrate 21 is not particularly limited as long as it can support the light-transmissive conductive layer 22, the power generation layer 23, and the electrode 24. For example, it may be 10 μm or more and 300 μm or less.

[0041] The light-transmissive substrate 21 is a substrate required in the manufacturing process of the power generation cell 20 and is not necessarily a necessary configuration. The light-transmissive substrate 21 may be used only during the manufacturing process of the solar power generation device 2, for example, and may be removed after manufacturing or during manufacturing. When removed, a substrate without light-transmittance may be used instead of the light-transmissive substrate 21.

[0042] (Light-transmissive conductive layer 22) The light-transmissive conductive layer 22 is a conductive layer and functions as a cathode. The light-transmissive conductive layer 22 has light-transmittance. The light-transmissive conductive layer 22 is preferably transparent.

[0043] As the light-transmissive conductive layer 22, for example, transparent materials such as indium tin oxide (ITO), fluorine-doped tin oxide (FTO), and Nesa film can be mentioned. The light-transmissive conductive layer 22 is formed on the surface of the light-transmissive substrate by, for example, sputtering method, ion plating method, plating method, coating method, or the like.

[0044] In addition, as the light-transmissive conductive layer 22, it may be configured to have light-transmissivity by forming a pattern through which light can pass while using an opaque material. Examples of the opaque material include platinum, gold, silver, copper, aluminum, rhodium, indium, titanium, nickel, tin, zinc, or an alloy containing these. Examples of the pattern through which light can pass include a lattice shape, a linear shape, a wavy shape, a honeycomb shape, a round hole shape, and the like.

[0045] The thickness of the light-transmissive conductive layer 22 is preferably, for example, 30 nm or more and 300 nm or less. When the light-transmissive conductive layer 22 is 30 nm or more and 300 nm or less, good conductivity can be obtained while maintaining high flexibility.

[0046] (Power generation layer 23) The power generation layer 23 is a layer that causes photoelectric conversion by irradiation with light, and generates electrons and holes from excitons generated by absorbing light. As shown in FIG. 2(B), the power generation layer 23 includes a hole transport layer 30, a photoelectric conversion layer 31, and an electron transport layer 32. The hole transport layer 30, the photoelectric conversion layer 31, and the electron transport layer 32 are laminated in this order along the direction from the light-transmissive conductive layer 22 toward the electrode 24.

[0047] (Hole transport layer 30) The hole transport layer 30 extracts the holes generated in the photoelectric conversion layer 31 to the transparent conductive layer 22 and prevents the electrons generated in the photoelectric conversion layer 31 from moving to the transparent conductive layer 22. As the material of the hole transport layer 30, for example, metal oxides can be used. Examples of the metal oxides include titanium oxide, molybdenum oxide, vanadium oxide, zinc oxide, nickel oxide, lithium oxide, calcium oxide, cesium oxide, aluminum oxide, etc. In addition, other delafossite-type compound semiconductors (CuGaO2), copper oxide, copper thiocyanate (CuSCN), vanadium pentoxide (V2O5), graphene oxide, etc. may also be used. Also, as the material of the hole transport layer 30, a p-type organic semiconductor or a p-type inorganic semiconductor can be used.

[0048] The thickness of the hole transport layer 30 is preferably, for example, 1 nm or more and 1000 nm or less, more preferably 10 nm or more and 500 nm or less, and even more preferably 10 nm or more and 50 nm or less. If the thickness of the hole transport layer 30 is 1 nm or more and 1000 nm or less, the transport of holes can be realized.

[0049] (Photoelectric conversion layer 31) The photoelectric conversion layer 31 (photoactive layer) is a layer that photoelectrically converts the absorbed light. The material of the photoelectric conversion layer 31 is not particularly limited as long as it can photoelectrically convert the absorbed light. For example, amorphous silicon, perovskite, non-silicon-based materials (semiconductor material CIGS), etc. are used. Also, the photoelectric conversion layer 31 may have a tandem-type laminated structure in which these are combined. The photoelectric conversion layer 31 using non-silicon-based materials uses a semiconductor material CIGS containing copper (Cu), indium (In), gallium (Ga), and selenium (Se), and it is easy to reduce the thickness of the photoelectric conversion layer.

[0050] Hereinafter, as an example of the case where the power generation unit 10 contains an organic component, a case where a perovskite compound containing an organic component is included in the photoelectric conversion layer 31 of the power generation unit 10 will be described. The photoelectric conversion layer 31 containing the perovskite compound has an advantage that the dependence of the power generation efficiency on the angle of incident light (hereinafter sometimes referred to as the incident angle dependence) is relatively low. Thereby, in the present embodiment, higher power generation efficiency can be obtained.

[0051] The perovskite compound is a perovskite crystal structure and a structure having a crystal similar thereto. The perovskite crystal structure is represented by the composition formula ABX3. In this composition 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 thereto.

[0052] The organic group of the organic cation constituting the A site is not particularly limited, and examples thereof include an alkylammonium derivative and a formamidinium derivative. The organic cation constituting the A site may be one type or two or more types.

[0053] The metal of the metal cation constituting the B site is not particularly limited, and examples thereof include 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.

[0054] The halogen of the halogen anion constituting the X site is not particularly limited, and examples thereof include F, Cl, Br, I, etc. The halogen anion constituting the X site may be one type or two or more types.

[0055] The thickness of the photoelectric conversion layer 31 is preferably, for example, 1 nm or more and 1000000 nm or less, more preferably 100 nm or more and 50000 nm or less, and still more preferably 300 nm or more and 1000 nm or less. When the thickness of the photoelectric conversion layer 31 is 1 nm or more and 1000000 nm or less, the photoelectric conversion efficiency is improved.

[0056] (Electron transport layer 32) The electron transport layer 32 extracts the electrons generated in the photoelectric conversion layer 31 to the electrode 24 and prevents the holes generated in the photoelectric conversion layer 31 from moving to the electrode 24. As the electron transport layer 32, for example, it is preferable to contain either a halogen compound or a metal oxide.

[0057] Examples of the halogen compound include lithium halides (LiF, LiCl, LiBr, LiI), sodium halides (NaF, NaCl, NaBr, NaI), etc. Examples of the elements constituting the metal oxide include titanium, molybdenum, vanadium, zinc, nickel, lithium, potassium, cesium, aluminum, niobium, tin, barium, etc. Also, an n-type organic semiconductor or an n-type inorganic semiconductor can be used as the material of the electron transport layer 32.

[0058] The thickness of the electron transport layer 32 is, for example, preferably 1 nm or more and 1000 nm or less, more preferably 10 nm or more and 500 nm or less, and even more preferably 10 nm or more and 50 nm or less. If the thickness of the electron transport layer 32 is 1 nm or more and 1000 nm or less, the transport of electrons can be realized.

[0059] (Electrode 24) The electrode 24 has conductivity and functions as an anode. The electrode 24 can extract electrons from the photoelectric conversion layer 31 in response to the photoelectric conversion generated by the photoelectric conversion layer 31. The electrode 24 may be formed of a light-transmitting material or a light-blocking material. However, if the electrode 24 is formed of a light-blocking material, the light-shielding property of the solar power generation device 2 can be further improved (that is, the incidence of light from the opposite side of the surface 7 to the power generation unit 10 can be further suppressed). Examples of the material of the electrode 24 include platinum, gold, silver, copper, aluminum, rhodium, indium, titanium, nickel, tin, zinc, or alloys containing these.

[0060] (Barrier sheet 5) The barrier sheet 5 has translucency and constitutes the surface 7 of the photovoltaic power generation device 2 as described above. The barrier sheet 5 is preferably transparent. The barrier sheet 5 has barrier performance against water vapor and protective performance against external forces.

[0061] The barrier sheet 5 has flexibility. As the material used for the barrier sheet 5, the longitudinal elastic modulus is preferably 100 Pa or more and 10,000 MPa or less, and more preferably 1,000 MPa or more and 5,000 MPa or less. Specifically, examples of the material of the barrier sheet 5 include plastic films and vinyl films.

[0062] The thickness of the barrier sheet 5 is preferably 50 μm or more, and more preferably 100 μm or more. Also, the thickness of the barrier sheet 5 is preferably 2,000 μm or less, and more preferably 1,000 μm or less. When the thickness of the barrier sheet 5 is 50 μm or more and 2,000 μm or less, it is easy to set the bending strength of the photovoltaic power generation device 2 to 50 MPa or more and 150 MPa or less.

[0063] (Sealing agent 11) The sealing agent 11 prevents water from entering the power generation layer 23 from around the power generation layer 23. The sealing agent 11 has translucency and is preferably transparent. Note that the sealing agent 11 does not necessarily need to cover all of the power generation unit 10. For example, when a part of the power generation unit 10 is exposed from the sealing agent 11, the exposed portion may be covered with a sealing edge material 12 or the like.

[0064] Examples of the material of the sealing agent 11 include ethylene vinyl acetate (EVA), polyolefin, butyl rubber, silicone resin, polyvinyl butyral, acrylic resin, polyisobutylene resin, SBS resin, SIBS resin, and epoxy resin.

[0065] The transverse elastic modulus of the sealant 11 is preferably 0.01 or more and 500 MPa or less, more preferably 0.05 or more and 250 MPa or less, and still more preferably 0.1 or more and 100 MPa or less. By doing so, following the thermal expansion and contraction caused by the temperature difference between the backsheet 6 and the barrier sheet 5, the sealant 11 deforms in the plane direction. Thereby, it is possible to suppress the backsheet 6 and the barrier sheet 5 from peeling off from the sealant 11 due to the shear stress generated by thermal expansion and contraction. The "transverse elastic modulus" referred to in the present application is, for example, a value calculated from the longitudinal elastic modulus and the Poisson's ratio obtained by the tensile test method.

[0066] Also, the sealant 11 can be defined by viscosity from another viewpoint. The viscosity of the sealant 11 is preferably 11000 mPa·S or more and 700000 mPa·S or less, more preferably 26000 mPa·S or more and 450000 mPa·S or less, and still more preferably 40000 mPa·S or more and 110000 mPa·S or less.

[0067] Examples of the material of the sealant 11 in this case include polyolefin, butyl rubber, silicone resin, polyvinyl butyral, acrylic resin, polyisobutylene resin, and the like. The "viscosity" referred to in this specification is a value measured at an environmental temperature of 23°C in accordance with the rotational viscometer method of JIS Z8803.

[0068] The backsheet 6 and the barrier sheet 5 are adhered via the sealant 11, and the adhesive strength is preferably 0.1 N / 10 mm or more and 10 N / 10 mm or less in the peel test. In particular, when it is applied in a bent state, the shear stress generated in the photovoltaic power generation device 2 becomes larger. Therefore, by adopting the adhesive strength within the above range in the peel test, long-term peeling can be effectively suppressed. The peel test is performed in accordance with JIS Z 0237.

[0069] From the viewpoint of enhancing the effect of suppressing peeling, the thickness of the sealant 11 is preferably 10 μm or more, more preferably 30 μm or more, and still more preferably 50 μm or more. On the other hand, the thickness of the sealant 11 is preferably 300 μm or less, more preferably 200 μm or less, and still more preferably 100 μm or less. By setting the thickness of the sealant 11 to 10 μm or more, it is possible to sufficiently secure a relief margin for shear stress during thermal expansion and contraction. By setting the thickness of the sealant 11 to 300 μm or less, the weight of the photovoltaic power generation device 2 can be reduced, so that the workability and constructability can be improved.

[0070] Note that the sealant 11 is not necessarily required and may not be provided. When the sealant 11 is not provided, in the photovoltaic power generation device 2, for example, only the power generation unit 10 is disposed between the barrier sheet 5 and the back sheet 6, and the barrier sheet 5 and the back sheet 6 are respectively adhered to the power generation unit 10.

[0071] (Sealing edge material 12) The sealing edge material 12 has a structure in which a first adhesive portion 40 adhered to the outer surface 7 of the barrier sheet 5, a sealing portion 41 that seals between the outer peripheral edge of the barrier sheet 5 and the outer peripheral edge of the back sheet 6, and a second adhesive portion 42 adhered to the outer surface 8 of the back sheet 6 are sequentially connected.

[0072] Examples of the material of the sealing edge material 12 include tape materials made of butyl rubber, silicone rubber, etc.

[0073] The sealing edge material 12 is not necessarily required. For example, the edge portion of the barrier sheet 5 may be bent toward the back sheet 6 side, and the bent tip may be joined to the back sheet 6. Alternatively, the edge portion of the back sheet 6 may be bent toward the barrier sheet 5 side, and the bent tip may be joined to the barrier sheet 5. By doing so, the sealing edge material 12 becomes unnecessary.

[0074] (Operation of the photovoltaic power generation device 2) According to the above-described solar power generation device 2, when the light irradiated on the outer surface 7 of the barrier sheet 5 enters the power generation unit 10, the photoelectric conversion layer 31 of the power generation layer 23 absorbs the light and performs photoelectric conversion, thereby generating electrons and holes in the photoelectric conversion layer 31. The electrons are extracted to the electrode 24 (anode) through the electron transport layer 32, and the holes are extracted to the translucent conductive layer 22 (cathode) through the hole transport layer 30, so that a current flows from the translucent conductive layer 22 to the electrode 24 (i.e., power generation is performed).

[0075] In the photoelectric conversion unit constituting the power generation unit 10, an extension portion 24a is provided on the electrode 24 (anode) of each power generation cell 20 (FIG. 2(C)). The extension portion 24a of the electrode 24 extends toward the translucent conductive layer 22 (cathode). In two adjacent power generation cells 20, 20, the extension portion 24a of the electrode 24 of one cell 20 is joined to the translucent conductive layer 22 of the other cell 20. By this joining, while the solar power generation device 2 is irradiated with light, a current flows from the translucent conductive layer 22A at one end of the power generation unit 10 (photoelectric conversion unit) to the electrode 24A at the other end of the power generation unit 10 (the flow of the current is indicated by an arrow in FIG. 2(C)). The current is taken out through a power distribution line (not shown).

[0076] By configuring the power generation unit 10 from the above-described photoelectric conversion unit, even if a problem occurs in some of the power generation cells 20, the amount of electricity extracted from the power generation unit 10 can be stabilized.

[0077] Instead of providing the extension portion 24a on the electrode 24 (anode) of each power generation cell 20, an extension portion extending toward the electrode 24 (anode) side may be provided on the translucent conductive layer 22 (cathode) of each power generation cell 20. In this case, in two adjacent power generation cells 20, 20, the extension portion of the translucent conductive layer 22 of one cell 20 is joined to the electrode 24 of the other cell 20. Even in this way, the same effect as described above can be obtained.

[0078] When the light-transmissive base material 21 is provided in the power generation unit 10, from the viewpoint of facilitating the manufacture of the power generation unit 10, as shown in FIG. 3(C), it is preferable that the light-transmissive conductive layer 22, the power generation layer 23, and the electrode 24 of each power generation cell 20 are supported by a common light-transmissive base material 21.

[0079] When the power generation unit 10 is composed of a single power generation cell 20, the current flowing from the electrode 24 to the light-transmissive conductive layer 22 is taken out via the distribution line.

[0080] Note that the solar power generation device 2 may include a plurality of power generation units 10. In this case, the plurality of power generation units 10 are arranged in the plane direction of the solar power generation device 2 and are electrically connected in series or in parallel.

[0081] When the power generation unit 10 is composed of a photoelectric conversion unit, in order to connect a plurality of power generation units 10 in series, in two adjacent power generation units 10, 10, the light-transmissive conductive layer 22A at one end of one power generation unit 10 and the electrode 24A at the end of the other power generation unit 10 are connected via a distribution line. When connecting a plurality of power generation units 10 in parallel, the light-transmissive conductive layers 22A, 22A at the ends of two adjacent power generation units 10, 10 and the electrodes 24A, 24A at the ends of the two adjacent power generation units 10, 10 are respectively connected via a distribution line.

[0082] When the power generation unit 10 is composed of a single power generation cell 20, in order to connect a plurality of power generation units 10 in series, in two adjacent power generation units 10, 10, the light-transmissive conductive layer 22 of one power generation unit 10 and the electrode 24 of the other power generation unit 10 are connected via a distribution line. When connecting a plurality of power generation units 10 in parallel, the light-transmissive conductive layers 22, 22 of two adjacent power generation units 10, 10 and the electrodes 24, 24 of the two adjacent power generation units 10, 10 are respectively connected via a distribution line.

[0083] In addition, in the case where the power generation unit 10 is composed of either the above-described photoelectric conversion unit or one power generation cell 20, the distance between adjacent power generation units 10, 10 may be more than 0 mm, preferably 2 mm or more, more preferably 5 mm or more, even more preferably 10 mm or more, and still more preferably 15 mm or more. Also, the distance between adjacent power generation units 10, 10 is preferably 100 mm or less, more preferably 50 mm or less, and still more preferably 20 mm or less.

[0084] (Rigid member 3) The rigid member 3 is a member having higher rigidity than the solar power generation device 2. As the material of the rigid member 3, for example, resin or metal can be used. Examples of the above resin include vinyl chloride, polypropylene (PP), polyethylene (PE), polycarbonate (PC), acrylic, or polytetrafluoroethylene (PTFE). Examples of the above metal include aluminum, stainless steel, iron, or alloys. When the rigid member 3 is formed from resin, it is preferable to make the color of the rigid member 3 black in order to enhance the weather resistance of the rigid member 3. When the rigid member 3 is formed from metal, a coating or a protective layer may be provided on the rigid member 3 from the viewpoint of corrosion resistance.

[0085] In the present embodiment, the rigid member 3 is attached to an end portion 2a on one side in the longitudinal direction of the solar power generation device 2 in a state where the solar power generation device 2 is spread out, and the solar power generation device 2 is wound in a roll shape in the longitudinal direction so that the end portion 2a constitutes the tip of the outermost periphery of the roll-shaped solar power generation device 2.

[0086] Note that the rigid member 3 may be attached to an end portion on one side in the width direction of the solar power generation device 2 in a state where the solar power generation device 2 is spread out. In this case, the solar power generation device 2 is wound in a roll shape in the width direction so that the end portion on one side in the width direction constitutes the tip of the outermost periphery of the roll-shaped solar power generation device 2.

[0087] In addition, the attachment of the rigid member 3 to the end of the photovoltaic power generation device 2 is realized, for example, by fastening, fitting, locking, or clamping with bolts and nuts. Alternatively, the attachment of the rigid member 3 to the end of the photovoltaic power generation device 2 is realized by adhering the rigid member 3 to the end of the photovoltaic power generation device 2 using an adhesive such as a resin composition containing at least one or more selected from vinyl acetate resin, ethylene vinyl acetate resin, epoxy resin, cyanoacrylate resin, acrylic resin, chloroprene rubber, styrene, butadiene rubber, polyurethane resin, silicone resin, and modified silicone resin.

[0088] Note that the rigid member 3 may be detachably attached to the end of the photovoltaic power generation device 2. This detachable attachment is realized, for example, by fitting the end of the photovoltaic power generation device 2 into a slit formed in the rigid member 3, or by clamping the rigid member 3 and the end 2a of the photovoltaic power generation device 2 with a clip.

[0089] FIG. 3 is a plan view showing a construction method for fixing the photovoltaic power generation device 2 included in the storage structure 1 according to an embodiment of the present invention to the installation surface 4.

[0090] The installation surface 4 is constituted by the surface of a building material. Examples of the building material include roofing materials, wall materials (such as metal siding materials, ceramic siding materials, sandwich panels, etc.), partitions, door materials, fence materials, floor materials, etc. Examples of the roofing material include roofing materials used for folded plate roofs, slate roofs, roof decks, tile roofs, and flat roofs. The roof may be laid longitudinally or transversely. Note that the present invention does not limit the member having the installation surface 4 to the above building materials, and the installation surface 4 may be constituted by the surface of a paving body forming a road, or may be the surface of a structure such as an automobile, a train, or a ship. In the illustrated example, the installation surface 4 is a plane, but it may be a curved surface. Also, the material of the member constituting the installation surface 4 is not particularly limited and may be, for example, metal, resin, asphalt, or concrete.

[0091] The construction method for fixing the photovoltaic power generation device 2 included in the storage structure 1 according to this embodiment to the installation surface 4 is, as shown in Fig. 3(A), in the state where the photovoltaic power generation device 2 is wound in a roll shape, the step A of fixing the rigid member 3 to the installation surface 4, the step B of unfolding and spreading the roll-shaped photovoltaic power generation device 2 as shown in Fig. 3(B), and the step C of fixing the unfolded photovoltaic power generation device 2 to the installation surface 4 as shown in Fig. 3(C) (Steps A, B, and C are executed in the order of step A → step B → step C).

[0092] In step A, for example, the rigid member 3 is fixed to the installation surface 4 by pressing the rigid member 3 toward the installation surface 4 side with a pressing member 50.

[0093] The pressing member 50 is constituted by, for example, a bolt or a stud made of metal or resin in which a shaft portion with a small diameter extends from a head portion with a large diameter. In this case, the tip side of the shaft portion penetrating through the portion of the rigid member 3 extending outside the photovoltaic power generation device 2 is penetrated under the installation surface 4, and the head portion is pressed against the frame member 50, so that the frame member 50 is pressed toward the installation surface 4 side by the pressing member 50. Or, the tip side of the shaft portion penetrating through the overlapping portions of the rigid member 3 and the photovoltaic power generation device 2 is penetrated under the installation surface 4, and the head portion is pressed against the rigid member 3, so that the frame member 50 is pressed toward the installation surface 4 side by the pressing member 50. The number and installation positions of the pressing members 50 are appropriately set according to the length of the rigid member 3 and the like. When a plurality of pressing members 50 are provided as in the illustrated example, it is preferable to arrange the pressing members 50 at equal intervals in the longitudinal direction of the rigid member 3. Further, the pressing member 50 may be constituted by a clamp that sandwiches the rigid member 3 and the "object (building material, etc.) constituting the installation surface 4".

[0094] In Step B, with the rigid member 3 fixed to the installation surface 4, the solar power generation device 2 is gradually deployed from one longitudinal side of the solar power generation device 2 provided with the rigid member 3, thereby expanding the solar power generation device 2. When the solar power generation device 2 is expanded in Step B, the orientation of the roll-shaped solar power generation device 2 arranged on the installation surface 4 in Step A is adjusted so that the surface 7 (the surface 7 of the barrier sheet 5) of the solar power generation device 2 irradiated with sunlight is located on the side opposite to the installation surface 4.

[0095] When the rigid member 3 is attached to one end of the solar power generation device 2 in the width direction, in Step B, the solar power generation device 2 is gradually deployed from one side in the width direction of the solar power generation device 2, thereby expanding the solar power generation device 2.

[0096] In Step C, for example, a frame member 51 is installed along the end of the solar power generation device 2 where the rigid member 3 is not provided, and the frame member 51 is pressed against the installation surface 4 side by a pressing member 52.

[0097] The frame member 51 is formed of metal or resin. As the metal for forming the frame member 51, it is preferable to use a hard metal such as aluminum, cast iron, or stainless steel. As the resin for forming the frame member 51, it is preferable to use a hard resin reinforced with carbon fiber or glass fiber. When the frame member 51 is formed of resin, it is preferable to color the frame member 51 black in order to enhance the weather resistance of the frame member 51.

[0098] The pressing member 52 is composed of a bolt or a stud made of metal or resin, with a large-diameter head and a small-diameter shaft extending therefrom. The tip side of the shaft passing through the frame member 51 is penetrated under the installation surface 4, and the head is pressed against the frame member 51, whereby the frame member 51 is pressed against the installation surface 4 side by the pressing member 52. The number and installation positions of the pressing members 52 are appropriately set according to the length of the frame member 51 and the like. When providing a plurality of pressing members 52 as in the illustrated example, it is preferable to arrange the pressing members 52 at equal intervals in the longitudinal direction of the frame member 51. Further, the pressing member 52 may be composed of a clamp that sandwiches the frame member 51 and the "object (such as a building material) constituting the installation surface 4".

[0099] (Function and effect) According to the storage structure 1 according to this embodiment, since the solar power generation device 2 is formed in a roll shape, the area of the solar power generation device 2 exposed to the wind can be suppressed to be small. Thereby, it is possible to suppress the solar power generation device 2 from being bent due to the wind hitting the surface of the solar power generation device 2.

[0100] In addition, in order to suppress the solar power generation device 2 from being bent, it is not necessary to improve the rigidity of the solar power generation device, so the solar power generation device can be made flexible enough to follow various shapes of the installation surface. Therefore, the storage structure 1 according to this embodiment is suitable for making the solar power generation device fixable to various installation surfaces.

[0101] Also, by using the rigid member 3 as a handle, the transportation of the storage structure 1 and the construction of fixing the solar power generation device 2 to the installation surface 4 can be smoothly performed.

[0102] In the illustrated example, the rigid member 3 has a rectangular parallelepiped shape, and one side of the width of the rigid member 3 (the upper side of the rigid member 3 in FIG. 1(B)) is joined to the end 2a of the photovoltaic power generation device 2, and the other side of the width of the rigid member 3 (the lower side of the rigid member 3 in FIG. 1(B)) extends outside the photovoltaic power generation device 2. However, the structure of the rigid member 3 is not limited to the structure of the illustrated example, and various structures that can be used as a handle may be adopted. The cross-section of the rigid member 3 may be triangular, polygonal with 5 or more corners, circular, or elliptical. Also, the entire width of the rigid member 3 may be joined to the end 2a of the photovoltaic power generation device 2.

[0103] According to the construction method according to the present embodiment, with the rigid member 3 fixed, the operation of spreading the photovoltaic power generation device 2 and the operation of fixing the photovoltaic power generation device 2 are performed. Therefore, the operation of spreading the photovoltaic power generation device 2 and the operation of fixing the photovoltaic power generation device 2 can be performed in a state where the photovoltaic power generation device 2 is made difficult to bend. Thus, the photovoltaic power generation device 2 can be fixed to the installation surface 4 while suppressing the photovoltaic power generation device 2 from bending due to wind hitting the surface of the photovoltaic power generation device 2. From the viewpoint of making the entire width of the photovoltaic power generation device 2 difficult to bend, it is preferable that the rigid member 3 extends over the entire width of the photovoltaic power generation device 2 as in the illustrated example. Note that the present invention does not limit the rigid member 3 to extending over the entire width of the photovoltaic power generation device 2. For example, a plurality of rigid members 3 are attached to the end 2a of the photovoltaic power generation device 2 so that the rigid members 3 are arranged side by side over the entire width of the photovoltaic power generation device 2. After fixing each rigid member 3 to the installation surface 4 in step A, by sequentially executing step B and step C, the operation of spreading the photovoltaic power generation device 2 in step B and the operation of fixing the photovoltaic power generation device 2 in step C can be performed in a state where the entire width of the photovoltaic power generation device 2 is made difficult to bend.

[0104] (Modification example) The present invention is not limited to the above-described embodiments and can be variously modified. Hereinafter, modification examples of the present invention will be described. In the following description, differences from the matters described above will be described, and matters common to the matters described above will be denoted by the same reference numerals and the description thereof will be omitted. When performing construction to fix the photovoltaic power generation device 2 included in the storage structure of the modification example shown below to the installation surface 4, the above-described steps A, B, and C are executed in this order.

[0105] For example, the storage structure of the photovoltaic power generation device 2 of the present invention can be modified as shown in FIG. 4. FIG. 4(A) is a plan view showing the storage structure of the photovoltaic power generation device 2 according to a modification example of the present invention. FIG. 4(B) is a cross-sectional view showing a state in which the storage structure according to the modification example of the present invention is cut along the line A-A in FIG. 4(A).

[0106] The storage structure 60 shown in FIG. 4 includes a core material 61 in addition to the photovoltaic power generation device 2 and the rigid member 3 shown in the above-described embodiment, and the photovoltaic power generation device 2 is wound around the core material 61 in a roll shape.

[0107] The core material 61 is a rod-shaped member formed of a soft resin, a hard resin, a pulp material such as paper, or a metal. Examples of the above soft resin include a rubber material, soft vinyl chloride, or low-density polyethylene (PE: polyethylene). Examples of the above hard resin include vinyl chloride, polypropylene (PP: polypropylene), polycarbonate (PC: polycarbonate), acrylic, or polypropylene (PP: polypropylene). Examples of the above metal include aluminum, SUS (Steel Special Use Stainless), or cast iron or an alloy. Examples of the above pulp material include cardboard and wood. The above may be used in combination, and the material is not particularly limited as long as it can serve as an axis for maintaining the roll shape of the photovoltaic power generation device 2.

[0108] From the viewpoint of suppressing damage to the photovoltaic device 2 due to contact with the core material 61, the cross-section of the core material 61 is preferably circular, but may have a shape with corners (triangular, square, or polygonal with five or more corners). When the core material 61 is made of a soft resin with a low elastic modulus such as a rubber material, soft vinyl chloride, or low-density polyethylene (PE: polyethylene), even if the cross-section of the core material 61 has a shape with corners, damage to the photovoltaic device 2 due to contact with the core material 61 can be suppressed.

[0109] When performing the construction of fixing the photovoltaic device 2 provided in the storage structure 60 shown in FIG. 4 to the installation surface 4, the core material 61 is removed as the roll-shaped photovoltaic device 2 is deployed and spread out in step B (see FIG. 3(B)).

[0110] According to the storage structure 60 shown in FIG. 4, by winding the photovoltaic device 2 around the core material 61 in a roll shape, the roll shape of the photovoltaic device 2 can be maintained more stably, and it is possible to more reliably suppress the roll-shaped photovoltaic device 2 from bending.

[0111] Also, the storage structure of the photovoltaic device 2 of the present invention can be deformed as shown in FIG. 5. FIG. 5(A) is a plan view showing a storage structure 70 of a photovoltaic device 2 according to a modified example of the present invention. FIG. 5(B) is a cross-sectional view showing a state in which the storage structure 70 according to the modified example of the present invention is cut along the line A-A in FIG. 5(A).

[0112] The storage structure 70 shown in FIG. 5 includes a rod-shaped member 71 in addition to the photovoltaic device 2 and the rigid member 3 shown in the above embodiment.

[0113] The rod-shaped member 71 includes a core material 72 around which the photovoltaic device 2 is wound in a roll shape, a first protruding portion 73 protruding in the longitudinal direction of the core material 72 from one end 72a in the longitudinal direction of the core material 72, and a second protruding portion 74 protruding in the longitudinal direction of the core material 72 from the other end 72b in the longitudinal direction of the core material 72.

[0114] The core material 72 is formed from the same material as the core material 61 shown in FIG. 4, and the cross-section of the core material 72 exhibits a circular or a shape having corners (triangular, square, or a polygonal shape having five or more corners). When the core material 72 is made of a soft resin having a low elastic modulus such as a rubber material, soft vinyl chloride, or low-density polyethylene (PE: polyethylene), even if the cross-section of the core material 72 exhibits a shape having corners, damage to the photovoltaic device 2 due to contact with the core material 72 can be suppressed.

[0115] The first protruding portion 73 and the second protruding portion 74 are exposed outside the roll-shaped photovoltaic device 2 and are used as handles. The first protruding portion 73 and the second protruding portion 74 are rod-shaped members formed of a soft resin, a hard resin, or a metal. Examples of the above-mentioned soft resin include a rubber material, soft vinyl chloride, or low-density polyethylene (PE: polyethylene). Examples of the above-mentioned hard resin include vinyl chloride, polypropylene (PP: polypropylene), polycarbonate (PC: polycarbonate), acrylic, or polypropylene (PP: polypropylene). Examples of the above-mentioned metal include aluminum, SUS (Steel Special Use Stainless), or cast iron or an alloy. Examples of the above-mentioned pulp material include cardboard, wood, etc. The above may be used in combination, and the material is not particularly limited as long as it can serve as an axis for maintaining the roll shape of the photovoltaic device 2. The cross-sections of the first protruding portion 73 and the second protruding portion 74 exhibit a circular or a shape having corners (triangular, square, or a polygonal shape having five or more corners).

[0116] To facilitate the manufacture of the rod-shaped member 71, it is preferable to form the core member 72, the first protruding portion 73, and the second protruding portion 74 from the same material. Also, in the illustrated example, the cross-sectional area of the core member 72 is made larger than the cross-sectional areas of the first protruding portion 73 and the second protruding portion 74. However, to facilitate the manufacture of the rod-shaped member 71, the cross-sectional shapes of the core member 72, the first protruding portion 73, and the second protruding portion 74 may be made to coincide (that is, the cross-sectional shape of the rod-shaped member 71 may have a constant shape over the entire length of the rod-shaped member 71). In this case, the central portion of the rod-shaped member 71 around which the solar power generation device 2 is wound in a roll corresponds to the core member 72, and one side portion and the other side portion of the rod-shaped member 71 that are exposed to the outside of the roll-shaped solar power generation device 2 correspond to the first protruding portion 73 and the second protruding portion 74, respectively.

[0117] When performing the construction of fixing the solar power generation device 2 provided in the storage structure 70 shown in FIG. 5 to the installation surface 4, the rod-shaped member 71 is removed as the roll-shaped solar power generation device 2 is deployed and spread out in step B (see FIG. 3(B)).

[0118] According to the storage structure 70 shown in FIG. 5, since the solar power generation device 2 is wound around the core member 72 in a roll, the roll shape of the solar power generation device 2 can be maintained more stably, and it is possible to more reliably suppress the roll-shaped solar power generation device 2 from bending.

[0119] Also, according to the storage structure 70 shown in FIG. 5, by using the first protruding portion 73 and the second protruding portion 74 as handles, the transportation of the storage structure 70 and the construction of fixing the solar power generation device 2 to the installation surface 4 can be carried out smoothly.

[0120] Also, the storage structure of the solar power generation device 2 of the present invention can be deformed as shown in FIG. 6. FIG. 6(A) is a plan view showing a storage structure 80 of a solar power generation device 2 according to a modified example of the present invention. FIG. 6(B) is a cross-sectional view showing a state in which the storage structure 80 according to the modified example of the present invention is cut along the line A-A in FIG. 6(A).

[0121] The storage structure 80 shown in FIG. 6 includes an annular member 81 in addition to the photovoltaic device 2 and the rigid member 3 shown in the above embodiment.

[0122] The annular member 81 includes a core member 82 around which the photovoltaic device 2 is wound in a roll shape, and a bent or curved portion 83 that extends from one end 82a in the longitudinal direction of the core member 82 to the other end 82b in the longitudinal direction of the core member 82 and forms an annular shape together with the core member 82.

[0123] The core member 82 is formed of the same material as the core member 61 shown in FIG. 4, and the cross section of the core member 82 is circular or has a shape with corners (triangular, square, or polygonal with five or more corners). When the core member 82 is made of a soft resin with a low elastic modulus such as a rubber material, soft vinyl chloride, or low-density polyethylene (PE: polyethylene), even if the cross section of the core member 82 has a shape with corners, damage to the photovoltaic device 2 due to contact with the core member 82 can be suppressed.

[0124] The bent portion 83 is exposed outside the roll-shaped photovoltaic device 2 and is used as a handle. The bent portion 83 is formed of a soft resin, a hard resin, or a metal. Examples of the above soft resin include a rubber material, soft vinyl chloride, or low-density polyethylene (PE: polyethylene). Examples of the above hard resin include vinyl chloride, polypropylene (PP: polypropylene), polycarbonate (PC: polycarbonate), acrylic, or polypropylene (PP: polypropylene). Examples of the above metal include aluminum, SUS (Steel Special Use Stainless), or cast iron or alloy. The bent portion 83 has a cross section in a circular or cornered shape (triangular, square, or polygonal with five or more corners). A part of the cross section of the bent portion 83 may be circular, and the remaining part of the cross section of the bent portion 83 may have a shape with corners.

[0125] In FIG. 6(A), the bent portion 83 includes a parallel portion 84 provided in parallel with the core material 82 at a distance from the core material 82, a first protruding portion 85 protruding in the longitudinal direction of the core material 82 from one end 82a in the longitudinal direction of the core material 82, a first connecting portion 86 connecting one end 84a in the longitudinal direction of the parallel portion 84 and the tip 85a of the first protruding portion 85, a second protruding portion 87 protruding in the longitudinal direction of the core material 82 from the other end 82b in the longitudinal direction of the core material 82, and a second connecting portion 88 connecting the other end (not shown) in the longitudinal direction of the parallel portion 84 and the tip (not shown) of the second protruding portion 87. The cross-sections of the parallel portion 84, the first protruding portion 85, and the second protruding portion 87 are circular, and the cross-sections of the first connecting portion 86 and the second connecting portion 88 are rectangular. This shows a case, but the structure of the bent portion 83 is not limited to the structure of the illustrated example. The structure of the bent portion 83 may have various structures that form a bent or curved shape from one end 82a in the longitudinal direction of the core material 82 to the other end 82b in the longitudinal direction of the core material 82 and form a ring shape together with the core material 82.

[0126] From the viewpoint of facilitating the manufacture of the annular member 81, it is preferable to form the core material 82 and the bent portion 83 from the same material. Also, from the same viewpoint, the cross-sectional shapes of the core material 82 and the bent portion 83 may be made to coincide (that is, the cross-sectional shape of the annular member 81 may be a constant shape over the entire circumference of the annular member 81). In this case, a part of the annular member 81 around which the solar power generation device 2 is wound in a roll shape corresponds to the core material 82, and the remaining part of the annular member 81 exposed to the outside of the roll-shaped solar power generation device 2 corresponds to the bent portion 83.

[0127] When performing the construction of fixing the solar power generation device 2 provided in the storage structure 80 shown in FIG. 6 to the installation surface 4, the annular member 81 is removed as the roll-shaped solar power generation device 2 is deployed and spread out in step B (see FIG. 3(B)).

[0128] According to the storage structure 80 shown in FIG. 6, since the solar power generation device 2 is wound around the core material 82 in a roll shape, the roll shape of the solar power generation device 2 can be maintained more stably, and it is possible to more reliably suppress the roll-shaped solar power generation device 2 from bending.

[0129] Also, according to the storage structure 80 shown in FIG. 6, by using the bent portion 83 as a handle, the transportation of the storage structure 80 and the construction of fixing the solar power generation device 2 to the installation surface 4 can be smoothly performed.

[0130] Also, the storage structure of the solar power generation device 2 of the present invention can be deformed as shown in FIG. 7. FIG. 7(A) is a plan view showing a storage structure 90 of a solar power generation device 2 according to a modified example of the present invention. FIG. 7(B) is a cross-sectional view showing a state in which the storage structure 90 according to the modified example of the present invention is cut along the line A-A of FIG. 7(A).

[0131] The storage structure 90 shown in FIG. 7 includes a bent member 91 joined to the bent portion 83 of the annular member 81, in addition to the solar power generation device 2, the rigid member 3, and the annular member 81 shown in FIG. 8.

[0132] The bent member 91 exhibits a bent or curved shape from the first position 83a to the second position 83b in the bent portion 83. The bent member 91 is exposed outside the roll-shaped solar power generation device 2 and is used as a handle. The bent member 91 is formed of a soft resin, a hard resin, or a metal. Examples of the above-mentioned soft resin include a rubber material, soft vinyl chloride, or low-density polyethylene (PE: polyethylene). Examples of the above-mentioned hard resin include vinyl chloride, polypropylene (PP: polypropylene), polycarbonate (PC: polycarbonate), acrylic, or polypropylene (PP: polypropylene). Examples of the above-mentioned metal include aluminum, SUS (Steel Special Use Stainless), or cast iron or an alloy. The bent member 91 exhibits a cross-section in a shape having a circular or angular portion (triangular, square, or polygonal shape having 5 or more corners). A part of the cross-section of the bent member 91 may be circular, and the remaining cross-section of the bent portion 83 may be in a shape having an angular portion. The joining of the bent member 91 to the bent portion 83 is achieved by integrally molding the bent portion 83 and the bent member 91, welding the bent member 91 to the bent portion 83, or welding the bent member 91 to the bent portion 83.

[0133] In FIG. 7(A), the bent member 91 includes a parallel portion 92 provided parallel to the parallel portion 84 with a gap therebetween, a first connecting portion 93 connecting one end 92a in the longitudinal direction of the parallel portion 92 and the first position 83a of the bent portion 83, and a second connecting portion 94 connecting the other end (not shown) in the longitudinal direction of the parallel portion 92 and the second position 83b of the bent portion 83. The cross-section of the parallel portion 84 is circular, and the cross-sections of the first connecting portion 93 and the second connecting portion 94 are rectangular. However, the structure of the bent member 91 is not limited to the above structure. The structure of the bent portion 91 may be various structures that exhibit a bent or curved shape from the first position 83a to the second position 83b in the bent portion 83 and form an annular shape together with the portion of the bent portion 83 between the first position 83a and the second position 83b.

[0134] Also, according to the storage structure 70 shown in FIG. 6, in addition to the bent portion 83, the bent member 91 can also be used as a handle, so that the transportation of the storage structure 70 and the construction of fixing the photovoltaic power generation device 2 to the installation surface 4 can be carried out smoothly. As shown in the figure, it is preferable to provide the bent member 91 at a position facing the core member 92 in a direction orthogonal to the longitudinal direction of the core member 82. In this way, by using the bent member 91 as a handle, the storage structure 70 can be transported in a state where the roll-shaped photovoltaic power generation device 2 is horizontally extended, so that the transportation of the storage structure 70 can be carried out smoothly.

[0135] Also, in FIGS. 1, 3, 4, 5, 6, and 7, an example is shown in which the photovoltaic power generation device 2 included in the storage structures 1, 60, 70, 80, and 90 is wound so that the surface 7 of the photovoltaic power generation device 2 that irradiates light (the outer surface 7 of the barrier sheet 5 (FIG. 2(A))) faces outward. However, the photovoltaic power generation device 2 included in the storage structures 1, 60, 70, 80, and 90 may be wound in a roll shape so that the back surface 8 of the device 2 (the outer surface 8 of the back sheet 6 (FIG. 2(A))) faces outward (the storage structure 100 shown in FIG. 8 is a modification of the storage structure 1 shown in FIG. 1 in which the photovoltaic power generation device 2 is wound in a roll shape so that the back surface 8 of the photovoltaic power generation device 2 faces outward). By doing so, when storing the photovoltaic power generation device 2, the amount of light incident on the power generation unit 10 (FIG. 2(A)) can be reduced, so that the deterioration of the power generation unit 10 due to the non-consumption of generated electricity can be suppressed while suppressing the number of parts. Even when the photovoltaic power generation device 2 is wound in a roll shape so that the back surface 8 of the photovoltaic power generation device 2 faces outward as described above, as shown in FIG. 9, when the photovoltaic power generation device 2 is unfolded in step B, the surface 7 of the photovoltaic power generation device 2 is located on the side opposite to the installation surface 4. Thus, the orientation of the roll-shaped photovoltaic power generation device 2 arranged on the installation surface 4 in step A is adjusted (FIG. 9 shows a construction method for fixing the photovoltaic power generation device 2 included in the storage structure 100 shown in FIG. 8 to the installation surface 4).

[0136] Also, in the above-described storage structure, a rigid member may be attached to the end portion 2a of the photovoltaic power generation device 2 immediately before the construction of fixing the photovoltaic power generation device 2 to the installation surface 4.

[0137] Further, from the perspective of maintaining the roll shape of the photovoltaic power generation device 2, the above-described storage structure may include a hollow exterior member 110 that houses the roll-shaped photovoltaic power generation device 2 therein (the storage structure 120 shown in FIG. 10 is the storage structure 60 shown in FIG. 4 with the exterior member 110 provided, and the storage structure 130 shown in FIG. 11 is the storage structure 1 shown in FIG. 1 with the exterior member 110 provided). As shown in FIGS. 11 and 12, housing the roll-shaped photovoltaic power generation device 2 inside the exterior member 110 also includes the case where the tip side 2b of the outermost periphery of the photovoltaic power generation device 2 extends out from the slit 111 formed in the exterior member 110.

[0138] Examples of the material of the exterior member 110 include fiber, pulp paper, cardboard, hard resin, soft resin, and metal. Examples of the above soft resin include rubber material, soft vinyl chloride, or low-density polyethylene (PE: polyethylene). Examples of the above hard resin include vinyl chloride, polypropylene (PP: polypropylene), polycarbonate (PC: polycarbonate), acrylic, or polypropylene (PP: polypropylene). Examples of the above metal include aluminum, SUS (Steel Special Use Stainless), or cast iron or alloy.

[0139] When providing the exterior member 110 to the storage structure 70 shown in FIG. 5, it is preferable to extend the first protrusion 73 and the second protrusion 74 outside the exterior member 110 so as to use them as handles. When providing the exterior member 110 to the storage structure 80 shown in FIG. 6, it is preferable to extend the bent portion 83 outside the exterior member 110 so as to use it as a handle. When providing the exterior member 110 to the storage structure 90 shown in FIG. 7, it is preferable to extend at least the bent member 91 of the bent portion 83 and the bent member 91 outside the exterior member 110 so as to use it as a handle, or to extend the bent member 91 outside the exterior member 110.

[0140] Also, as shown in FIG. 12, the exterior material 110 may have an insertion portion 122 that is inserted into the cavity at the center of the roll-shaped solar power generation device 2. By doing so, the roll shape of the solar power generation device 2 can be maintained without providing a core material around which the solar power generation device 2 is wound.

[0141] Note that the radius of the roll-shaped solar power generation device 2 is preferably 10 cm or more, and more preferably 15 cm or more. By setting the radius within this numerical range, damage to the solar power generation device 2 during storage and transportation can be suppressed. Also, the radius of the roll-shaped solar power generation device 2 is preferably 100 cm or less, more preferably 75 cm or less, and even more preferably 50 cm or less. By setting the radius within this numerical range, the "influence of wind" on the solar power generation device 2 can be appropriately suppressed.

[0142] Also, when the rigid member 3 included in the above-described storage structure is detachably attached to the end portion 2a of the solar power generation device 2, the construction method for fixing the solar power generation device 2 included in the above-described storage structure to the installation surface 4 is, instead of the above-described step A, "With the rigid member 3 removed from the end portion 2a of the solar power generation device 2, install the frame member 51 along the end portion 2a of the solar power generation device 2, and press the frame member 51 toward the installation surface 4 side with the pressing member 52", and after this step, the above-described steps B and C may be carried out. The above frame member has the same characteristics as the frame member 51, and the pressing member has the same characteristics as the pressing member 52.

Explanation of Reference Numerals

[0143] 1, 60, 70, 80, 90, 100, 120, 130 Storage structure 2 Solar power generation device 2a End portion of the solar power generation device 4 Installation surface 3 Rigid member 61, 72, 82 Core material 110 Exterior material

Claims

1. A photovoltaic power generation device and, a rigid member attached to an end portion of the photovoltaic power generation device, wherein the photovoltaic power generation device has a storage structure in which the end portion to which the rigid member is attached forms the outermost peripheral tip portion and is wound in a roll shape.

2. The storage structure of the photovoltaic power generation device according to Claim 1, wherein the bending strength of the photovoltaic power generation device is 10 MPa or more and 200 MPa or less.

3. The storage structure of the photovoltaic power generation device according to Claim 1, wherein the bending modulus of elasticity of the photovoltaic power generation device is 500 MPa or more and 10,000 MPa or less.

4. The storage structure of the photovoltaic power generation device according to Claim 1, wherein the minimum bending radius of the photovoltaic power generation device is 10 cm or more.

5. The storage structure of the photovoltaic power generation device according to Claim 1, wherein the rigid member is detachably attached to an end portion of the photovoltaic power generation device.

6. The storage structure of the photovoltaic power generation device according to Claim 1, wherein the photovoltaic power generation device includes a core material around which it is wound in a roll shape.

7. including a hollow exterior material, and the photovoltaic power generation device in a roll shape is housed inside the exterior material. The storage structure of the photovoltaic power generation device according to Claim 1.

8. The storage structure of the photovoltaic power generation device according to Claim 1, wherein the rigid member extends over the entire width of the photovoltaic power generation device.

9. The storage structure of the photovoltaic power generation device according to Claim 1, wherein the photovoltaic power generation device has flexibility.

10. A construction method for fixing a photovoltaic power generation device provided with the storage structure according to Claim 1 to an installation surface, a step of fixing the rigid member to the installation surface while the photovoltaic power generation device is wound in a roll shape, a step of unfolding and spreading the photovoltaic power generation device in a roll shape, and a step of fixing the unfolded photovoltaic power generation device to the installation surface. The construction method includes at least these steps.

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