JP5642021B2 - Membrane solar power generator - Google Patents

Description

  The present invention relates to a film-like photovoltaic power generation apparatus in which a flexible plate-shaped solar cell is attached to a film body supported and stretched by a stationary member such as a building by a fixture.

  Conventionally, the above-described film-like photovoltaic power generation apparatus is disclosed in Patent Document 1 below. According to this publication, the membrane-like photovoltaic power generation apparatus is provided on a film body that is supported and stretched by a fixed-side member, and extends on the outer surface of the film body while extending along the surface direction of the film body. A flexible plate-shaped solar cell, and a fixture for attaching the solar cell to the film body. Moreover, this fixture is comprised with the resin-made transparent cover body which covers the said solar cell entirely from the outer side, and an outer edge part is welded to the said film body.

  And when the said solar cell receives sunlight, the light energy of sunlight is converted into electrical energy by this solar cell. The electric energy is charged in a battery or supplied to other electric devices so that natural energy can be effectively used.

JP 60-107871 A

  By the way, in the said conventional technique, as above-mentioned, since a cover body covers a solar cell entirely from the outer side, all the sunlight which goes to a solar cell once permeate | transmitted the said cover body. Thereafter, the solar cell receives light. Accordingly, since the light energy of the sunlight is attenuated by the amount of sunlight transmitted through the cover body, the conversion efficiency for converting the light energy into electric energy tends to be reduced in this solar power generation device.

  Further, as described above, since the cover body covers the solar cell as a whole from the outside, the area of the cover body tends to increase and the mass tends to increase. Therefore, there is a possibility that the life of the photovoltaic power generation apparatus may be reduced due to an increase in the load applied from the cover body to the film body.

  The present invention was made paying attention to the above situation, and an object of the present invention is to improve the conversion efficiency for converting the light energy of sunlight into electrical energy in a photovoltaic power generation device, and It is to be able to improve the life of this solar power generation device.

The invention according to claim 1 is a film body 4 supported and stretched by the fixed-side member 2, and a flexibility that extends along the surface direction of the film body 4 and is disposed on the outer surface of the film body 4. In a film-like solar power generation apparatus including a plate-shaped solar cell 5 and a fixture 6 for attaching the solar cell 5 to the film body 4,
The fixture 6 is a state in which the through hole 9 formed in the outer edge portion 5a of the solar cell 5 and one end portion 10a are joined to the film body 4 and the other end portion 10b side is inserted into the through hole 9. The film-like solar power generation apparatus is characterized in that the other end portion 10b has the attachment film material 10 bonded W2 to the film body 4.

  According to the invention of claim 2, one end portion 10a of the attachment film material 10 is disposed on the back side of the solar cell 5, and the other end portion 10b of the attachment film material 10 is located outward in the surface direction of the solar cell 5. It is arrange | positioned, It is a film | membrane-shaped solar power generation device of Claim 1.

  The invention according to claim 3 is that a plurality of other end portions 10b of the attachment film material 10 are arranged at predetermined intervals along the outer edge portion 5a of the solar cell 5, and the one end portions 10a of the respective attachment film materials 10 are arranged. The film-like solar power generation device according to claim 1 or 2, wherein are integrally connected.

  According to the invention of claim 4, each outer edge portion 5 a of the solar cell 5 in the direction B perpendicular to the inclined direction A of the film body 4 in the surface direction of the film body 4 is respectively connected to the film body by the fixture 6. 4, a cover film material 14 is provided which covers a gap 13 between the outer edge 5 b of the upper part of the solar cell 5 and the film body 4 in the inclined direction A. 3 to 3 is a film-like solar power generation device.

  In addition, in this section, the reference numerals and drawing numbers appended to the above terms are not intended to limit the technical scope of the present invention to the “Example” section and the contents of the drawings described later.

  The effects of the present invention are as follows.

According to the first aspect of the present invention, there is provided a film body that is supported and stretched by the fixed member, and a flexible plate-shaped solar element that extends along the surface direction of the film body and is disposed on the outer surface of the film body. In a film-like photovoltaic power generation apparatus comprising a battery and a fixture for attaching the solar battery to the film body,
The fixture has a through-hole formed in the outer edge of the solar cell, one end is joined to the film body, and the other end is inserted into the through-hole, and the other end is the film body. And an attachment film material to be joined.

  For this reason, first, sunlight toward the solar cell is directly received by the solar cell without passing through the fixture or being disturbed by the fixture. Therefore, according to this solar power generation device, the conversion efficiency for converting light energy into electrical energy can be improved.

  Second, since the fixture for attaching the solar cell to the film body does not cover the solar cell as a whole as in the prior art, the shape can be reduced and the mass can be reduced. Therefore, since the load given to the film body from the fixture can be suppressed small, the life of the photovoltaic power generator can be improved.

  In addition, as described above, the attachment film material of the fixture has one end joined to the film body, and the other end is inserted into the through hole formed in the outer edge of the solar cell. The part is joined to the film body. For this reason, due to the flexibility of the attachment film material, the solar cell is attached to the film body in a state where a certain degree of relative movement is allowed with respect to the film body. Therefore, even if an external force such as tension is applied to the solar cell from the side of the film body supported and stretched by the fixed member, this is suppressed by the relative movement of the solar cell with respect to the film body described above. In this respect, the life of the photovoltaic power generator can be improved.

  Third, as described above, the solar cell is attached to the film body by the attachment film material of the fixture to be joined to the film body. For this reason, even if the solar cell cannot be directly bonded and attached to the film body due to the difference in the respective materials or the melting temperatures, the solar cell is attached to the film body. Is made possible by the mounting film material of the fixture described above. Therefore, according to the above invention, the solar cell can be attached to the film body regardless of the structural differences such as the materials of the film body and the solar cell. The degree of freedom of selection is improved.

  According to a second aspect of the present invention, one end portion of the attachment film material is disposed on the back surface side of the solar cell, and the other end portion of the attachment film material is disposed outward in the surface direction of the solar cell.

  For this reason, when a solar cell is attached to the film body with a fixture, one end of the attachment film material of the fixture is disposed on the back side of the solar cell, and it is prevented from being easily seen in appearance. The Therefore, the appearance of the solar power generation device is improved.

  In addition, when the solar cell is attached to the film body with a fixture, the other end portion of the attachment film material of the fixture is disposed outside the solar cell, so the attachment film of the fixture to the film body The joining of the other end of the material can be smoothly performed without being disturbed by the solar cell. Therefore, the solar cell can be easily attached to the film body by the fixture.

  According to a third aspect of the present invention, a plurality of other end portions of the attachment film material are disposed at predetermined intervals along the outer edge portion of the solar cell, and one end portions of the respective attachment film materials are integrally connected. ing.

  For this reason, even if an external force such as a tensile force is applied from the film body to the solar cell through the mounting film material of the fixture, the external force is dispersed through each other end side of the mounting film material and the solar cell. Therefore, since the solar cell is prevented from being damaged by the external force, the life of the photovoltaic power generator can be improved more reliably.

  In addition, as described above, since the one end portions of the attachment film materials of the fixture are integrally connected to each other, each of the attachment film materials of the fixture is intended to be attached to the film body with the fixture. When attaching one end part to a film body, this joining process can be reduced by avoiding joining each one end part to the film body. Therefore, since it is possible to easily join each end portion of the attachment film material to the film body, it is possible to easily attach the solar cell to the film body.

  According to a fourth aspect of the present invention, in the surface direction of the film body, each outer edge portion of the solar cell in a direction orthogonal to the inclined direction of the film body is attached to the film body by the mounting tool, and is inclined. A cover film material is provided to cover a gap between the outer edge portion of the upper part of the solar cell in the direction and the film body.

  For this reason, when snow falls down on the film body in the inclined direction, the snow is prevented from entering between the film body and the solar cell by the respective fixtures and the cover film material. . Therefore, it is possible to prevent the snow from staying on the film body, and the load applied to the film body is suppressed to be small. Therefore, also in this respect, the life of the photovoltaic power generation apparatus can be improved.

FIG. 3 shows Example 1 and is an enlarged sectional view taken along line I-I in FIG. 2. 1 is a partial plan view of a photovoltaic power generation apparatus according to a first embodiment. FIG. FIG. 3 shows Example 1 and is an enlarged cross-sectional view taken along line III-III in FIG. 2. FIG. 2 shows a second embodiment and corresponds to FIG.

  The present invention relates to a membranous solar power generation device, in which it is possible to improve the conversion efficiency for converting the light energy of sunlight into electric energy and to improve the lifetime of this solar power generation device. In order to realize the purpose of, the form for carrying out the present invention is as follows.

  That is, the film-like photovoltaic power generation apparatus includes a film body that is supported and stretched by the fixed member, and a flexible plate that extends along the surface direction of the film body and is disposed on the outer surface of the film body. A solar cell having a shape, and a fixture for attaching the solar cell to the film body. The fixture has a through-hole formed in an outer edge portion of the solar cell, and one end is joined to the film body, and the other end is inserted into the through-hole, and the other end is the film body. And an attachment film material to be joined.

  In addition, the said joining can be joined by adhesion | attachment by an adhesive agent, or welding by a heat | fever.

  In order to describe the present invention in more detail, Example 1 will be described with reference to FIGS.

  1-3, the code | symbol 1 is a film-form solar power generation device. The solar power generation device 1 includes a film body 4 supported and stretched by a support 3 on a stationary member 2 such as a building, and extends along the outer surface (upper surface) of the film body 4 and on the outer surface. Are provided with a plurality of flexible plate-shaped solar cells 5 and a fixture 6 for attaching each of the solar cells 5 to the film body 4.

  The film body 4 extends in a direction A inclined downward with respect to a horizontal plane so that the upper surface thereof faces sunlight. The film body 4 includes a base material that is a woven fabric formed of natural fibers such as kenaf fibers, synthetic fibers such as polyester fibers, or inorganic fibers such as glass fibers, and the outer surface of the base material is coated (coating). And a surface material (coating material) made of thermoplastic resin such as polyvinyl chloride (PVC) or fluororesin. The surface material of the film body 4 may be a thermoplastic resin such as polyvinyl chloride or fluorine resin at least on the surface to be welded by heat, and the outer surface of the other part has a photocatalyst for preventing contamination. A layer may be provided, or a photocatalyst layer may be formed by adding photocatalyst particles to the thermoplastic resin.

  Each of the solar cells 5 has a rectangular shape, the same shape and the same size, and the inclined direction A in the plane direction of the film body 4 and a direction orthogonal to the inclined direction A (a direction without inclination). It is arranged on the outer surface of the film body 4 so as to have a grid pattern with respect to B. The surface material (cover material) of each of the solar cells 5 is formed of a fluororesin such as tetrafluoroethylene-ethylene copolymer (ETFE).

  The fixture 6 has a slit-like through hole 9 formed in the outer edge portion 5a of the solar cell 5 in the orthogonal direction B, and one end portion 10a joined to the film body 4 by thermal welding W1 and the other end. The other end portion 10b has the attachment film material 10 to be bonded W2 to the film body 4 by thermal welding in a state where the portion 10b side is inserted into the through hole 9.

  At least the surface material of the mounting film material 10 is not particularly limited as long as it is a material that can be bonded or thermally welded to the film body 4 with an adhesive. For example, at least the surface material of the film body 4 may be polyvinyl chloride. For example, polyvinyl chloride is preferable, and if at least the surface material of the film body 4 is a fluororesin, at least the surface material of the mounting film material 10 may be the same material among thermoplastic resins, such as a fluororesin. preferable. In particular, when the surface material of the film body 4 is a fluororesin, it is made of a tetrafluoroethylene-hexafluoropropylene copolymer (FEP) having a low melt viscosity with the mounting film material 10 in order to increase the bonding strength. The attachment film material 10 itself may be prepared by FEP by interposing a tape, thereby making it possible to obtain a practically sufficient welding strength.

  A plurality (four) of the through holes 9 are formed at predetermined equal intervals in a direction (inclined direction A) along each outer edge of the solar cell 5. On the other hand, a plurality (four) of the attachment film materials 10 are provided individually for each through hole 9. Each of the attachment film members 10 is formed in a rectangular shape that is long in the orthogonal direction B, and has the same shape and size. The respective attachment film materials 10 are arranged at predetermined equal intervals in the same direction as the through holes 9 in the direction along the outer edge portions of the solar cell 5 (inclined direction A). The structure and material of the attachment film material 10 are the same as those of the film body 4.

  One end portion 10 a in the longitudinal direction of each of the attachment film materials 10 is disposed on the back side of the outer edge portion 5 a of the solar cell 5, that is, between the outer edge portion 5 a of the solar cell 5 and the film body 4. Is joined W1. Further, the other end portion 10b in the longitudinal direction of each of the attachment film materials 10 is disposed in the vicinity of the outer side in the surface direction of the solar cell 5 (the surface direction of the film body 4) and is joined to the film body 4 by W2. .

  In addition, as shown with the dashed-dotted line in FIG. 2, each end part 10a of the some (4) attachment film material 10 in each outer edge part 5a of the above-mentioned solar cell 5 is integrally connected, The said solar cell The fixtures 6 provided for each of the five outer edge portions 5a may be comb-shaped.

  2 and 3, a cover film material 14 is provided to cover the gap 13 between the outer edge 5b of the upper part of the solar cell 5 and the film body 4 in the inclined direction A from the outside. Specifically, the cover film material 14 has a strip shape that extends long in the orthogonal direction B along the outer edge portion 5 b at the top of the solar cell 5. The structure and material of the cover film material 14 are the same as those of the film body 4. The upper edge portion in the inclined direction A and each end portion in the longitudinal direction of the cover film material 14 are joined to the film body 4 by thermal welding. The lower end edge of the cover film material 14 in the inclined direction A is overlapped with the upper end edge of the solar cell 5 in the inclined direction A from the outside.

  As for the attachment film material 10 and the cover film material 14 of the fixture 6, similarly to the film body 44, the surface of the portion to be welded by heat is a thermoplastic resin such as polyvinyl chloride (PVC). In addition, a photocatalyst layer for preventing contamination may be provided on the outer surface of other portions, or a photocatalyst layer may be formed by incorporating photocatalyst particles into the thermoplastic resin.

  Moreover, joining W1-W3 by each said welding can be achieved by hot plate welding, high frequency welding, hot-air welding, thermal iron type welding, etc. In addition, each said joining W1-W3 can also join by an adhesive instead of welding.

  When the solar cell 5 is attached to the film body 4 supported and stretched by the fixed side member 2 with the fixture 6, the following can be performed.

  That is, as shown by a solid line in FIG. 1, first, one end portion 10a of the attachment film material 10 is joined W1 to the film body 4. Next, as shown by a one-dot chain line in FIG. 1, the solar cell 5 is moved from the outside of the film body 4 to the other end portion 10 b of the mounting film material 10 projected toward the outside of the film body 4. The other end 10 b side of the attachment film material 10 is inserted into the through hole 9 of the solar cell 5. Next, as shown by a solid line in FIG. 1, the other end portion 10 b of the mounting film material 10 is bent D and overlapped with the film body 4, and the film body 4 is joined W2. Hereinafter, the solar cell 5 can be attached to the film body 4 by bonding the attachment film materials 10 to the film body 4 as described above.

  According to the said structure, the fixture 6 is the through-hole 9 formed in the outer edge part 5a of the said solar cell 5, and one end part 10a is joined W1 to the said film body 4, and the other end part 10b side is the said through-hole 9 side. The other end portion 10b has the attachment film material 10 joined to the film body 4 in the state of being inserted into the film body 4.

  For this reason, firstly, the sunlight toward the solar cell 5 is directly received by the solar cell 5 without being transmitted through the fixture 6 or obstructed by the fixture 6. Therefore, according to this solar power generation device 1, the conversion efficiency for converting light energy into electrical energy can be improved.

  Second, the fixture 6 for attaching the solar cell 5 to the film body 4 does not entirely cover the solar cell 5 as in the prior art, so the shape is reduced and the mass is reduced. it can. Therefore, since the load applied to the film body 4 from the fixture 6 can be suppressed to be small, the life of the solar power generation device 1 can be improved.

  Moreover, as described above, the attachment film material 10 of the fixture 6 has one end portion 10 a bonded to the film body 4 and the other end portion 10 b side formed in the outer edge portion 5 a of the solar cell 5. The other end portion 10b is joined W2 to the film body 4 while being inserted into the film body 4. For this reason, due to the flexibility of the attachment film material 10, the solar cell 5 is attached to the film body 4 in a state where a certain degree of relative movement is allowed with respect to the film body 4. Therefore, even if an external force such as tension is applied to the solar cell 5 from the side of the film body 4 supported and stretched by the fixed-side member 2, It is suppressed by the relative movement, and also in this respect, the life of the photovoltaic power generator 1 is improved.

  Thirdly, as described above, the solar cell 5 is attached to the film body 4 by the attachment film material 10 of the fixture 6 joined to the film body 4 by W1 and W2. Therefore, suppose that the surface material of the film body 4 is a polyvinyl chloride resin (PVC) having a welding temperature of about 150 to 180 ° C., while the surface material of the solar cell 5 is a welding temperature of about 250 to 300 ° C. That is, it is possible to attach the solar cell 5 to the film body 4 by direct welding or the like due to the difference in the material of these 4, 5 or the difference in melting temperature. Even if it is not possible, the solar cell 5 can be mounted on the film body 4 by the mounting film material 10 of the mounting tool 6 described above. Therefore, according to the said structure, since the solar cell 5 can be attached to the film body 4 irrespective of structural differences, such as each material of the film body 4 and the solar cell 5, these film bodies 4 and the solar cell 5 can be attached. The degree of freedom in selecting the structure is improved.

  Further, as described above, one end portion 10 a of the attachment film material 10 is disposed on the back surface side of the solar cell 5, and the other end portion 10 b of the attachment film material 10 is disposed outward in the surface direction of the solar cell 5. Has been.

  For this reason, when the solar cell 5 is attached to the film body 4 with the fixture 6, the one end portion 10a of the attachment film material 10 of the fixture 6 is disposed on the back side of the solar cell 5, It is prevented from being easily seen. Therefore, the external appearance of the solar power generation device 1 is improved.

  Further, when the solar cell 5 is attached to the film body 4 with the fixture 6, the other end portion 10 b of the attachment film material 10 of the fixture 6 is disposed outside the solar cell 5. The joint W2 of the other end portion 10b of the attachment film member 10 of the attachment 6 can be smoothly performed without being obstructed by the solar cell 5. Therefore, the solar cell 5 can be easily attached to the film body 4 by the fixture 6.

  In addition, as described above, a plurality of the other end portions 10b of the attachment film material 10 are disposed at predetermined intervals along the outer edge portion 5a of the solar cell 5, and the one end portions 10a of the respective attachment film materials 10 are arranged with each other. They are connected together.

  For this reason, even if an external force such as a tensile force is applied from the film body 4 to the solar cell 5 through the attachment film material 10 of the fixture 6, the external force is transmitted through the other end portions 10 b of the attachment film material 10. Since the solar cell 5 is dispersed and given to the solar cell 5, and the solar cell 5 is prevented from being damaged by the external force, the life of the solar power generation device 1 can be improved more reliably.

  Further, as shown by the one-dot chain line in FIG. 2 described above, the one end portions 10 a of the respective attachment film materials 10 of the attachment 6 are integrally connected, so that the solar cell 5 is attached to the film body 4 by the attachment 6. When attaching each one end 10a of the attachment film material 10 of the fixture 6 to the film body 4 to be attached, avoid joining each of the one end parts 10a to the film body 4, and this joining W1. The number of steps can be reduced. Therefore, since the joining operation | work of each one end part 10a of the attachment film | membrane material 10 to the said film body 4 can be performed easily, the attachment of the solar cell 5 to the said film body 4 can be performed easily.

  Further, as described above, each outer edge portion 5a of the solar cell 5 in the direction B perpendicular to the inclined direction A of the film body 4 in the surface direction of the film body 4 is respectively connected to the film body 4 by the fixture 6. A cover film material 14 is provided which covers the gap 13 between the outer edge 5b of the upper part of the solar cell 5 and the film body 4 in the inclined direction A.

  For this reason, when the snow slides down on the film body 4 toward the lower side of the inclined direction A, the snow enters between the film body 4 and the solar cell 5. 14 and is prevented. Therefore, the snow is prevented from staying on the film body 4 and the load applied to the film body 4 is suppressed to be small, so that the life of the photovoltaic power generator 1 can also be improved in this respect.

  In addition, although the above is based on the example of illustration, the said solar cell 5 may be polygons, such as a triangle and a pentagon, and may be circular and an ellipse. The through hole 9 of the fixture 6 may be a long hole or a circle. Further, each outer edge portion of the solar cell 5 in the inclined direction A may be attached to the film body 4 by the fixture 6.

  Moreover, the number of the said through-holes 9 is not specifically limited, According to the length of the said inclined direction A of the said solar cell 5, etc., it sets suitably as needed. Moreover, you may provide in any outer edge part not only in the direction along the said inclined direction A but the direction along the orthogonal direction B, or the shape of the said solar cell.

  Furthermore, as an example of the case where the one end portion 10a of the attachment film material 10 is attached to the film body 4, the film body 4 may be welded first at the factory, and in this way, the sun at the construction site can be obtained. Attachment of the battery 5 becomes easier.

  FIG. 4 below shows a second embodiment. The second embodiment is common in many respects to the configuration and operational effects of the first embodiment. Therefore, regarding these common items, common reference numerals are attached to the drawings, and redundant description thereof is omitted, and different points are mainly described. In addition, the configuration of each part in these embodiments may be variously combined in light of the object and operational effects of the present invention.

  In order to describe the present invention in more detail, Example 2 will be described with reference to FIG.

  In FIG. 4, the attachment film material 10 is bent so as to overlap two, and one end portion 10 a and the other end portion 10 b thereof are both arranged outward in the surface direction of the solar cell 5. Further, the one end portion 10 a of the mounting film material 10 is disposed on the back side of the middle portion in the longitudinal direction of the mounting film material 10.

  According to the said structure, when attaching the solar cell 5 to the said film body 4 with the fixture 6, it can be as follows.

  That is, first, the attachment film material 10 is inserted into the through-hole 9 formed in the solar cell 5 and bent so as to be overlapped, and the combined bodies 5 and 10 are overlapped on the outer surface of the film body 4. Next, one end portion 10a and the other end portion 10b of the attachment film member 10 are sequentially joined to the film body 4 by W1 and W2. Hereinafter, the solar cell 5 can be attached to the film body 4 by bonding the attachment film materials 10 to the film body 4 as described above.

DESCRIPTION OF SYMBOLS 1 Photovoltaic power generation device 2 Fixed side member 3 Support tool 4 Film body 5 Solar cell 5a Outer edge part 5b Outer edge part 6 Attaching tool 9 Through-hole 10 Attachment film material 10a One end part 10b Other end part 13 Gap 14 Cover film material A Inclined Direction B Orthogonal direction C Approaching D Bending W1 bonding W2 bonding W3 bonding

Claims (4)

A film body supported and stretched by a fixed member, a flexible plate-shaped solar cell extending along the surface direction of the film body and disposed on the outer surface of the film body, and the solar cell In the film-like photovoltaic power generation apparatus provided with a fixture to be attached to the film body,
The fixture has a through-hole formed in the outer edge of the solar cell, one end is joined to the film body, and the other end is inserted into the through-hole, and the other end is the film body. A film-like photovoltaic power generation apparatus comprising: a mounting film material joined to the film.   The one end part of the said attachment film | membrane material is arrange | positioned at the back surface side of the said solar cell, The other end part of the said attachment film | membrane material is arrange | positioned outward of the surface direction of the said solar cell, It is characterized by the above-mentioned. Filmy solar power generator.   A plurality of other end portions of the attachment film material are arranged at predetermined intervals along an outer edge portion of the solar cell, and one end portions of the attachment film materials are integrally connected to each other. Item 3. The membranous solar power generation device according to item 1 or 2.   In the surface direction of the film body, each outer edge portion of the solar cell in a direction orthogonal to the inclined direction of the film body is attached to the film body by the fixture, and the upper portion of the solar cell in the inclined direction. The film-like solar power generation device according to any one of claims 1 to 3, further comprising a cover film material that covers a gap between the outer edge of the film body and the film body.

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