JPH08114013A - Roof material for solar power generation and its work execution method - Google Patents

Abstract

PURPOSE: To facilitate laying-wiring work or the like by sticking a light shielding material having a recess-projection surface to a surface of a power generation effective part of a roof material for solar power generation. CONSTITUTION: A solar roofing 1 is provided with a superposing marging part 12 in the width direction of a base material and a power generation effective part 11 composed of solar tiles, and in the power generation effective part 11, the plural solar tiles 3 having a photoelectric transfer function are juxtaposed on a roofing base material 2, and are covered with a surface protective material 4 after electric wiring is performed between them, and are formed in an integral sheet shape by passing these through a heated roller. It is smoothed by using a copolymer film or the like as the surface protective material 4, and a light shilding film 5 is separably stuck to a part existing on the power generation effective part 11 among this surface, and its surface is formed as a recess-projection surface 51 by embossing finish. A light shilding material stuck to a surface of the power generation effective part checks power generation of a photoelectric transfer element in solar roofing installing work, and protects an operator from an electric shock, and a recess-projection on a surface secures a scaffold of the operator.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roof material for solar power generation which can be used as a base material laid under a roof finishing material and a method for constructing the roof material.

[0002]

2. Description of the Related Art There are great expectations for solar cells as a source of clean energy. Since the amount of electric power obtained by the solar cell is proportional to the area of the solar cell, a large solar cell installation location is required to obtain a large amount of electric power. It is suitable to use the upper surface of the building, especially on the roof of a sloping house or the like, which is less likely to be used, as the installation place because it is close to the power consumption place.

The simplest method for installing a solar cell on the roof of a house or the like is to install a pedestal on a roof tile by fixing it to a roof structural member with metal fittings, etc., and to install a plurality of solar cell elements on this pedestal. It is a method of installing a module consisting of. However, in this case, the pedestal and the module become a structure independent of the roof, which requires not only high strength, but also the pedestal and the solar cell module impair the aesthetics of the house. there were.

Therefore, the development of solar cell roof tiles is underway as an alternative method. This solar cell roof tile is formed by directly forming the solar cell element on the roof tile base material, or by adhering or embedding the solar cell element on the roof tile base material. In addition, as a more versatile solar roof material, solar roofing is a
185665. In this solar roofing, a waterproof sheet called a roofing, which is a base material usually laid under a roof finishing material such as a tile in a roof for a house, is formed by a solar cell module. A roofing material having translucency is installed on the solar roofing to form a roof for a house.

[0005]

Even in the case of a roof to which solar roofing is applied, it is preferable to have a structure similar to that of an existing roof using normal roofing in terms of roof dubbing work, etc. Effective to increase. The normal roofing is wound in a roll before installation, and is installed sequentially on the roof roof plate. The roofing has a width of about 1 m, and is installed in multiple stages parallel to the roof ridge from the eaves side toward the ridge side, with an overlap of about 10 cm. Make roofing cuts at the edges of the roof. Therefore, the roofing is cut in accordance with the shape of the roof such as a fold or a square, and it may be necessary to cut the roofing obliquely with respect to the roll direction.

The problems to be solved by the present invention in order to handle the solar roofing as much as possible with such conventional roofing are as follows. (1) It is desirable that the surface of the solar cell be as smooth as possible in order to prevent dirt from adhering to it, but on the other hand, when the roof finishing material is installed on top of it, the worker will step on it From the viewpoint of ensuring the safety of personnel, it is desirable to make the surface rough. It is necessary to satisfy both of these requirements.

(2) The solar roofing is a power generator, and generates a voltage at the output terminal while it is exposed to light. Since solar roofing installation work is usually done during the day when it does not rain, electricity will be generated during the work. Therefore, it is necessary to take measures to prevent electric shock of workers. (3) Unlike ordinary roofing, solar roofing requires electrical wiring. The wiring is generally made of metal, but if the metal lead plate reflects light, the appearance of the roof is significantly impaired. It is necessary to prevent this.

(4) Even if the solar roofing is cut at an arbitrary angle according to the shape of the roof, it is necessary to have a structure in which the output loss is minimized. An object of the present invention is to solve the above-mentioned problems, that is, a photovoltaic roof material, that is, the surface is not contaminated with dirt, there is no possibility that an operator riding on it may slip, and there is no risk of electric shock, and metal wiring. Therefore, the present invention provides a roof material for photovoltaic power generation and a construction method thereof, which does not impair aesthetics and has a small output loss even when cut at an arbitrary angle.

[0009]

In order to achieve the above-mentioned object, the roof material for photovoltaic power generation of the present invention comprises a plurality of rectangular photoelectric conversion elements on a strip-shaped waterproof substrate in the substrate longitudinal direction. Has a power generation effective portion and a overlap margin portion through which common wiring for connecting the photoelectric conversion elements passes in the longitudinal direction of the substrate, and the light-shielding shielding material is peelably attached at least on the power generation effective portion. It is supposed to be worn. It is preferable that an uneven surface is formed on the surface of the light shielding material. The terminals of the photoelectric conversion element are provided in proximity to the sides of the photoelectric conversion element in the longitudinal direction of the base material, and the terminal of one polarity is one end in the longitudinal direction of the base material, and the terminal of the other polarity is in the longitudinal direction of the base material. It is effective that the other end is connected to the common wiring by a wiring, respectively, and the connection wiring with the terminal farther from the common wiring passes through the back surface side of the photoelectric conversion element in parallel with the side in the width direction of the photoelectric conversion element. . In that case, the connection wiring between the common wiring and the photoelectric conversion element terminal may pass in the direction perpendicular to the common wiring, or the two connection wirings of both terminals of one photoelectric conversion element and the common wiring may become the common wiring at the overlap margin. It is also possible to pass diagonally so that the interval becomes narrower as it gets closer. The construction method of the present invention for such a photovoltaic power generation roofing material is such that the longitudinal direction of the base material is parallel to the ridge direction and the layers are laid on the roof so as to be sequentially stacked on the stacking margin, and the common wiring and the roof wiring are provided. After connecting, peel off the light shielding material on the power generation effective part,
A translucent roof finishing material shall be installed on the surface.

[0010]

[Action]

(1) The light-shielding shielding material attached to the surface of the effective power generation part of the solar roofing, which is a roof material for photovoltaic power generation, prevents the photoelectric conversion element from generating electricity during the installation work of the solar roofing and protects workers from electric shock. To do. In addition, the unevenness of the surface of the light-shielding shielding material secures a foothold for the worker. Since the light-shielding shielding material is peeled off sequentially when the roof finishing material is installed, it has no effect on the photoelectric conversion characteristics.

(2) The common wiring for connecting the photoelectric conversion elements of the solar roofing is formed in the overlap margin portion, and the next solar roofing is laid on the overlap margin portion so that it cannot be seen directly from the outside and is also common. The long wiring connecting the wiring and the terminal on the lower side of the solar roofing also passes through the back surface side of the photoelectric conversion element and cannot be seen from the outside, so that the wiring does not spoil the appearance.

(3) Since a plurality of photoelectric conversion elements are connected in parallel by the solar roofing, even if the solar roofing is cut according to the shape and size of the roof, there is a possibility that a short circuit may occur according to the cutting line. If only the conversion element is separated and disabled, the other elements can be used as they are and the output loss can be minimized. Since the connection between the common wiring and the terminals at both ends of the photoelectric conversion element in the width direction of the substrate is performed in the vicinity of the diagonal end of the photoelectric conversion element, at least the connection wiring is cut by the cutting line that crosses the photoelectric conversion element. One or the common wiring connected to it is cut off,
This photoelectric conversion element is separated from the circuit.

(4) The connection wiring between the common wiring and the photoelectric conversion element terminal may be in a direction orthogonal to the common wiring at the overlap margin, but if the cutting line is oblique to the shape of the roof, the photoelectric conversion element However, the connection wiring may be cut, but the photoelectric conversion element may be wasted. If the connection wiring between both terminals and the common wiring is passed diagonally so that the spacing becomes narrower as it approaches the common wiring at the overlap margin, the connection wiring will be disconnected when the diagonal cutting that spreads from the ridge toward the eaves. The number of cases will be reduced.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a solar roofing which is a roofing material for photovoltaic power generation according to an embodiment of the present invention. (A) is a perspective plan view, (b) is a sectional view taken along the line AA of (a). . The solar roofing 1 is divided into a stacking margin portion 12 and a power generation effective portion 11 similar to a normal roofing. In the power generation effective portion 11, a plurality of solar tiles 3 having a photoelectric conversion function are arranged on the roofing base material 2, and electrical wiring between the solar tiles 3 is performed, and then the surface protective material 4 is provided.
Covered with. These are passed through a heated roll to form an integral sheet. As the surface protection material 4, a copolymer film of polyvinyl fluoride ethylene and ethylene fluoride or the like is used, and the surface is made smooth so as to prevent dirt from adhering. Further, the light-shielding film 5 is attached to the portion of the surface of the surface protective material 4 which is on the power generation effective portion 11. The material of the light-shielding film 5 is black vinyl chloride,
Use light-shielding materials such as paper and rubber that are thin sheets. The surface of the light-shielding film 5 becomes an uneven surface 51 by embossing or the like. The positive terminal 61 and the negative terminal 62 are exposed at the end of the overlap margin portion 12.

FIG. 2 is a perspective view showing a state in which the solar roofing 1 shown in FIG. 1 is installed on a roof roof plate, and FIG. 3 is a translucent tempered glass plate as a roof finishing material 7 thereon. It is a perspective view which shows the state which installed. As shown in FIG. 2, the solar roofing 1 is installed laterally in order from the eaves side while being overlapped by the overlapping margin portion 12. At this time, since the light-shielding film 5 covers the solar tile 3, the solar tile 3 does not generate power even when there is sunlight. Next, the plus terminal 61 and the minus terminal 62 shown in FIG. 1 of the solar roofing 1 are connected to a switchboard, and then the roof finishing material 7 is attached while removing the light-shielding film 5.
To fix it on the solar roofing 1. The uneven surface 51 on the surface of the light-shielding film 5 before peeling off provides a scaffold for the operator. In this embodiment, the power generation effective unit 11
Although the light-shielding film 5 is attached only to the surface of the above, it may be attached to the overlap margin portion 12 at the same time, and perforations may be provided so that the two can be easily separated. Then, after installation, if only the light-shielding connection film 5 of the power generation effective portion 11 is peeled off, the light-shielding film 5 having the uneven surface 51 on the surface remains in the overlap margin portion 12 under the roof finishing material 7 again. Considering the case of roof dubbing work, it is more effective in providing that scaffolding.

Next, examples of the structure of the solar tile 3 and the electric wiring in the solar roofing 1 will be described. FIG. 4 shows the structure of the solar tile, (a) is a bottom view and (b) is a sectional view taken along the line BB of (a).
As shown in the figure, the back surface electrode 32, the amorphous silicon solar cell layer 33, and the front surface electrode 34 are sequentially formed using the flexible film 31 as a substrate. These layers are divided into a plurality of unit cells 30 by a well-known method for forming a series connection structure of amorphous solar cells, and each solar tile is connected in series so as to generate a predetermined voltage. A positive terminal 35 connected to the electrode 34 and a negative terminal 36 connected to the back surface electrode 32 are provided.

FIG. 5 is a view showing a place where a plurality of solar tiles 3 are arranged on the roofing base material 2 and electric wiring is performed. In the embodiment, each solar tile 3 is independently adjusted to generate a predetermined voltage, and all the solar tiles are connected in parallel. Two plus and minus roofing lead plates 81 and 82 are attached in the longitudinal direction of the roll on the overlapping portion 12 of the roofing base material 2. The lead plates 81 and 82 are made of solder-plated copper plates. Next, the left part of the plus terminal 35 of the solar tile 3 and the plus roofing lead plate 81 are connected by a short lead plate 83, and the minus terminal 36 and the minus roofing lead plate 82 pass through the back surface on the left side of the solar tile. Connection is made by a long lead plate 84 that is parallel to the lead plate 83 and is insulated. In this embodiment, all the solar tiles 3 are connected in parallel. As a result, when the solar roofing 1 is cut in accordance with the shape of the roof, the cutting line passes through and the connecting lead plates 83, 84 of the solar tile 3 which may cause a short circuit.
Of at least one of the roofing lead plates 81, 82 connected to it, and this solar tile 3 is disconnected from the parallel circuit, so that the other solar tiles 3 can be used effectively and the output loss is minimized. It is limited. However, a plurality of solar tiles may be connected in series to form a block, and the left and right ends of each block may be used for connection with the roofing lead plate.

In the embodiment of FIG. 6, the lead plates 83 and 84 for connecting the solar tiles 3 and the roofing lead plates 81 and 82 are not perpendicular to the longitudinal direction of the solar roofing 1, but the roof shape is taken into consideration. The upper part is slanted. As a result, it is possible to prevent the solar tile 3 from being cut, but the lead plate 83 or 84 from being cut and the tile from being cut off in the circuit.

[0019]

According to the present invention, a stacking margin portion for stacking the next roofing material is provided on one side in the width direction of the roofing material for photovoltaic power generation, and at that portion for connecting the photoelectric conversion elements to each other. Through the common wiring, the other part is used as the power generation effective part, and by sticking a light-shielding shielding material on the effective part, it is possible to prevent dirt from adhering to the surface of the power generation effective part, and during installation and wiring work. By blocking the power generation by the shielding material, the worker can be protected from an electric shock accident. By forming the uneven surface on the surface of the light-shielding shielding material, it is possible to provide a non-slip scaffold for a worker who is working. Moreover, the appearance is not spoiled by passing the wiring through the overlapping portion and the back side of the photoelectric conversion element. A plurality of photoelectric conversion elements are arranged in the longitudinal direction of the substrate, and terminals are connected to the common wiring parallel to the terminals at both ends of the diagonal line of the photoelectric conversion element. Therefore, the roofing material according to the present invention is cut according to the shape of the roof. In this case, one of the connection wirings or the common wiring connected to the connection wiring of the photoelectric conversion element through which the cutting line passes is cut, and the photoelectric conversion element is automatically disabled and does not affect other elements. Further, by obliquely connecting the connection wiring, it is possible to prevent the connection wiring from being cut even though the photoelectric conversion element is not cut, and it is possible to minimize the loss of the power generation output.

[Brief description of drawings]

1 shows a solar roofing of an embodiment of the present invention, (a) is a perspective plan view, (b) is a sectional view taken along the line AA of (a).

FIG. 2 is a perspective view showing a laying state of a solar roofing roof.

FIG. 3 is a perspective view showing a state after installation of a roof finishing material through the state of FIG.

FIG. 4 shows a solar tile of the solar roofing of FIG. 1, (a) is a bottom view, and (b) is a sectional view taken along the line BB of (a).

FIG. 5 is a plan view showing a solar tile connection method according to an embodiment of the present invention.

FIG. 6 is a plan view showing a solar tile connecting method according to another embodiment of the present invention.

[Explanation of symbols]

 1 Solar roofing 11 Power generation effective portion 12 Stacking margin portion 2 Roofing base material 3 Solar tile 30 Unit cell 35 Solar tile positive terminal 36 Solar tile negative terminal 4 Surface protective material 5 Light-shielding film 61 Solar roofing positive terminal 62 Solar roofing negative terminal 7 Roof finishing material 81 Plus roofing lead plate 82 Minus roofing lead plate 83, 84 Lead plate

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display location H01L 31/042 31/04

Claims (6)

[Claims] 1. A power generation effective portion in which a plurality of rectangular photoelectric conversion elements are arranged in a longitudinal direction of a base material on a band-shaped waterproof base material, and a common wiring for connecting the photoelectric conversion elements to each other is a long base material. A roof material for solar power generation, which has a lap margin portion that passes in a direction, and in which a light-shielding shielding material is peelably attached to at least the power generation effective portion. 2. The roof material for photovoltaic power generation according to claim 1, wherein an uneven surface is formed on the surface of the light shielding material. 3. The terminals of the photoelectric conversion element are provided in proximity to the sides of the photoelectric conversion element in the longitudinal direction of the base material, and the one-polarity terminal is one end in the longitudinal direction of the base material and the other-polarity terminal is The other end of the base material in the longitudinal direction is connected by a common wiring and a wiring, respectively, and a connection wiring with a terminal on the side farther from the common wiring passes through the back surface side of the photoelectric conversion element in parallel to the side in the width direction of the photoelectric conversion element. The roofing material for photovoltaic power generation according to claim 1 or 2. 4. The roof material for photovoltaic power generation according to claim 3, wherein the connection wiring between the common wiring and both terminals of the photoelectric conversion element passes in a direction perpendicular to the common wiring. 5. The photovoltaic power generation system according to claim 3, wherein the two connection wirings of both terminals of one photoelectric conversion element and the common wiring pass obliquely so that the distance becomes narrower as they approach the common wiring in the overlap margin portion. Roofing material. 6. A light-shielding property on a power-generating effective portion after a common wiring and a roof wiring are connected by laying them on a roof with the longitudinal direction of the base material parallel to the ridge direction and sequentially laying on the overlapping portion. The method for constructing a roof material for photovoltaic power generation according to any one of claims 1 to 5, wherein the shielding material is peeled off, and a translucent roof finishing material is installed on the surface.