JPH08226210A - Roofing material for solar energy generation of electricity, and method for laying such material - Google Patents

Abstract

PURPOSE: To make easy and optional selection available for methods for connecting elements by a method wherein terminal electrodes are drawn from each of solar tiles and exposed to the side whereto sunbeam is shed. CONSTITUTION: Positive terminal electrodes 31 and negative terminal electrodes 32 are taken out on four corners on the sunbeam-shed surface of each of solar tiles placed on a roofing base material 2. In the case where the solar tiles 1 of a solar tile roofing composed of a plurality of solar tiles are connected in parallel connection, the adjoining positive terminal electrodes 31 and the adjoining negative terminal electrodes 32 are connected respectively with each other with bar-like connectors 8. In the case of connection in series connection, the connection is made between the positive terminal electrodes 31 and the negative terminal electrodes 32 on the adjoining tiles with the connector 8 that is placed so that it does not interfere incoming sunbeam. In this case, the length of the bar-like connector 8 can be shortened if the adjoining tiles are placed in the alternate directions with the positive terminal electrode 31 and 32, the negative terminal electrode 32 placed side by side. Electric shock can be prevented with both of the terminal electrodes on each of elements short-circuited with a connector.

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 roofing, which is a base material usually laid under a roof finishing material such as a roof tile in a residential roof, 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.

Solar roofing is shown in FIG. 3 or FIG.
As shown in FIG. 2, a plurality of flexible thin film solar cell elements 1 using a flexible substrate called a solar tile are arranged on a roofing base material 2. The solar tile 1 is formed by connecting a plurality of unit solar cells in series or in parallel, and usually includes a positive terminal electrode 31 and a negative terminal electrode 32 at both ends on the back surface as shown in FIG.
In the solar roofing of FIG. 3, a plurality of solar roofing 1 is arranged such that the terminal electrodes 31, 32 are on both sides of the base material 2 in the width direction, and the positive terminal electrode 3 of each tile 1 is arranged.
Each of the tiles 1 is electrically connected in parallel with each other by electrically connecting the negative terminal electrodes 32 to each other by one lead wire 4. The ends of the lead wire 4 are taken out as a positive terminal 51 and a negative terminal 52, respectively. The solar roofing of FIG. 4 arranges a plurality of solar tiles 1 so that the terminal electrodes 31, 32 of each tile are on one row in the longitudinal direction of the substrate 2, and each tile has a positive terminal electrode 31 adjacent to the tile. Are connected in series by sequentially connecting to the negative terminal electrode 32. Then, the positive terminal 51 and the negative terminal 52 are taken out from the tiles 1 at both ends. FIG. 6 is a cross-sectional view of solar roofing, and the tile 1 has a structure in which a binder resin 7 is sandwiched between a front surface protective material 61 and a rear surface protective material 62 together with a lead wire 4 connecting between them.

[0006]

Since the conventional solar roofing has a different structure depending on a predetermined solar tile connecting method as shown in FIGS. 2 and 3, it is possible to change the connecting method later. There is a problem that cannot be done. In addition, the work of laying the solar roofing on the roof under the sunlight is a hot line work since the solar cells generate electricity, which poses a problem of worker's danger.

The present invention provides a roof material for solar power generation, which can solve the above problems, can change the connection method of solar tiles, and is free from the risk of electric shock during laying work, and a method of constructing the same. It is in.

[0008]

In order to achieve the above object, the present invention provides a roofing material for photovoltaic power generation in which a plurality of thin film solar cell elements are arranged on a waterproof base material. It is assumed that the bipolar terminal electrodes are exposed on the light irradiation surface side. It is preferable that the terminal electrode is drawn out through the surface protective material that commonly covers each thin film solar cell element. The construction method of the present invention for such a roof material for photovoltaic power generation is to connect the terminal electrodes selected from the terminal electrodes exposed on the light irradiation surface side by a conductor according to the intended connection method. And After connecting the bipolar terminal electrodes of each thin-film solar cell element with conductors for each element and laying them on the roof in a short-circuited state, remove the connecting conductor for short-circuiting, and conduct the conductor for the intended connection method. Making a connection is a good way.

[0009]

[Function] By exposing the terminal electrodes of each thin-film solar cell element on the light irradiation surface, the connection method of the elements of the roof material for photovoltaic power generation can be arbitrarily selected, and the light irradiation surface is open even after installation. Can be easily connected by wiring from the side. Therefore, the roof material for photovoltaic power generation can be manufactured with a single structure regardless of the requirements of the user. When the light irradiation surface of the roof material is covered with the surface protection material, the terminal electrode may be pulled out through this protection material. Further, since each element can be short-circuited by utilizing the exposed terminal electrode, if the short-circuiting is performed until it is laid on the roof or the like, an electric shock accident will not occur during the laying work.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 shows a solar roofing according to an embodiment of the present invention, in which positive terminal electrodes 31 and negative terminal electrodes 32 are taken out at four corners of a light irradiation surface of each solar tile on a roofing base material 2. FIG. 2 shows each solar tile 1 of the solar roofing construction method according to the present invention.
In the example of connecting in parallel with each other, the positive terminal electrodes 31 of the adjacent tiles and the negative terminal electrodes 32 of the adjacent tiles are connected using the rod-shaped connecting body 8. In this case, the positive terminal 5
1, the minus terminal 52 is drawn to the outside from the tile 1 at one end of the solar roofing, but it can also be drawn to both sides in the width direction at the intermediate portion of the roofing. Figure 7 shows the case where the solar tiles 1 are connected in series.
Positive terminal electrode 31 and negative terminal electrode 3 of adjacent tiles
The two are connected using a rod-shaped connector 8 so as not to prevent light from entering each tile. In the case of FIG. 8, the directions of the solar tiles 1 are alternately switched so that the positive terminal electrode 31 and the negative terminal electrode 32 are adjacent to each other between adjacent tiles.
Adjacent terminal electrodes 31 and 32 are connected to each other by the rod-shaped connecting body 8 at positions where the terminal electrodes 31 and 32 are alternately changed in the width direction of the base material 2. Compared with the embodiment of FIG. 7, the length of the rod-shaped connector 8 is shorter, and there is less risk of obstructing the incidence of light. In either embodiment, the positive terminal 51 and the negative terminal 5 are connected to the solar tile 1 at both ends.
From the outside.

FIG. 9 shows a method of preventing electric shock by not generating power during the construction of these solar roofing, and the positive terminal electrode 31 and the negative terminal electrode 32 of each tile 1 are short-circuited by using the rod-shaped connecting body 8. I am letting you. As a result, no electricity is generated even when the tile surface is exposed to sunlight, and there is no risk of electric shock to the operator. Although the rod-shaped connecting body 8 is attached in parallel to the side of the tile in the figure, it is needless to say that the rod-shaped connecting body 8 may be attached to the side of the tile.

10 to 12 show an example of a structure in which a terminal electrode is taken out on the light irradiation surface of the solar tile. Figure 10
In the case of, the terminal electrodes 31 and 32 are taken out from the metal portion on the back surface of the tile 1 and protrude in a convex shape to a position higher than the tile. In the case of FIG. 11, one terminal electrode 31
From the surface of the tile 1 and the other terminal electrode 32 from the tile 1
It is taken out from the back side of the and protrudes in a convex shape to the place higher than the tile. FIG. 12 shows two terminal electrodes 31, 32.
Is taken out from the surface of the tile 1 and protrudes to a position higher than the tile. Tiles of these structures 1
FIG. 13 shows that a transparent resin is sandwiched between the front surface protective material 61 and the rear surface protective material 62 using the binder resin 7. As shown in FIG. 13, it is necessary to open a through hole 9 for extraction in the surface protection material 61 so that the terminal electrode 3 or 4 protruding in FIGS. 10 to 12 is projected to the outside of the solar roofing. By doing so, the solar roofing as shown in FIG. 1 can be obtained.

FIG. 14 shows the structure of the rod-shaped connecting body 8 for electrically connecting the tiles. FIG. 14 (a) is a top view,
FIG. 14B is a bottom view and FIG. 14C is a sectional view.
The conductor portion 11 made of, for example, copper is entirely covered with an insulator portion 12 made of, for example, plastic.
Two recesses 13 for connecting to the terminal electrodes 31 and 32 taken out from are opened. Since the conductor portion 11 and the terminal electrodes 31 and 32 of the tile must be securely connected electrically and mechanically, for example, FIG.
It is also possible to form the shape shown in FIG. Of each figure
(a) is a cross-sectional view of the conductor portion 11 of the rod-shaped connection body, (b) is a cross-sectional view of the terminal electrode 31 (32). In FIG. 15, the contact is made only in a planar manner, but in FIG. 16, the unevenness is formed on the inner surface of the recess 13 of the connection body and the outer surfaces of the terminal electrodes 31, 32 to strengthen the mechanical connection and improve the electrical connection. However, the contact area is increased and stability is increased. In FIG. 17, the same effect as that of FIG. 16 is obtained by making the cross-sectional shape of the recess 13 and the terminal electrodes 31 and 32 of the connection body into a pre-open type.

[0014]

According to the present invention, by exposing the terminal electrode of each element to the light irradiation surface, the element connection system can be arbitrarily selected, and the roof material for solar power generation can be constructed with a constant structure. It has become possible to manufacture. Therefore, it suffices to mass-produce a uniform structure, which leads to cost reduction. In addition, the exposed terminal electrodes can be used for short-circuiting, and it was possible to prevent an electric shock accident when laying on a roof or the like.

[Brief description of drawings]

FIG. 1 is a plan view of a solar roofing according to an embodiment of the present invention.

FIG. 2 is a plan view showing an embodiment of a construction method of the solar roofing of FIG.

FIG. 3 is a plan view of an example of a conventional solar roofing.

FIG. 4 is a plan view of another example of conventional solar roofing.

[Figure 5] Bottom view of the solar tile

FIG. 6 is a sectional view of a conventional solar roofing.

FIG. 7 is a plan view showing another embodiment of the solar roofing construction method of FIG.

FIG. 8 is a plan view showing still another embodiment of the solar roofing construction method of FIG.

FIG. 9 is a plan view showing an embodiment of a construction method of the solar roofing of FIG. 1 capable of preventing electric shock.

FIG. 10 is a cross-sectional view showing an example of drawing out terminal electrodes from the solar tile in the solar roofing of the embodiment of the present invention.

FIG. 11 is a cross-sectional view showing another example of the terminal electrode extraction from the solar tile in the solar roofing of the embodiment of the present invention.

FIG. 12 is a cross-sectional view showing still another example of the terminal electrode extraction from the solar tile in the solar roofing of the embodiment of the present invention.

FIG. 13 is a sectional view of a solar roofing according to an embodiment of the present invention.

FIG. 14 shows a connecting body used in an embodiment of a solar roofing construction method of the present invention, in which (a) is a top view and (b) is a top view.
Is a bottom view, (c) is a sectional view

FIG. 15 shows a connecting member in an embodiment of a solar roofing construction method of the present invention, where (a) is a cross-sectional view of a conductor portion of a rod-shaped connecting body, and (b) is a cross-sectional view of a terminal electrode.

FIG. 16 shows a connecting member in another embodiment of the solar roofing construction method of the present invention, where (a) is a sectional view of a conductor portion of a rod-shaped connecting body, and (b) is a sectional view of a terminal electrode.

FIG. 17 shows a connecting member in still another embodiment of the solar roofing construction method of the present invention, where (a) is a cross-sectional view of a conductor portion of a rod-shaped connecting body, and (b) is a cross-sectional view of a terminal electrode.

[Explanation of symbols]

 1 Solar Tile 2 Roofing Base Material 31 Positive Terminal Electrode 32 Negative Terminal Electrode 51 Positive Terminal 52 Negative Terminal 61 Surface Protecting Material 62 Backside Protecting Material 7 Binder Resin 8 Rod-shaped Connection

Claims (4)

[Claims] 1. A photovoltaic roof material having a plurality of thin-film solar cell elements arranged on a waterproof base material, wherein bipolar terminal electrodes of each element are exposed on the light irradiation surface side. Roof material for solar power generation. 2. The roof material for solar power generation according to claim 1, wherein the terminal electrode is drawn out through a surface protective material which covers each thin film solar cell element in common. 3. The sun according to claim 1, wherein a conductor is used to connect between the terminal electrodes selected from the terminal electrodes exposed on the light irradiation surface side according to the intended connection method. Construction method of roof material for photovoltaic power generation. 4. The thin-film solar cell element is connected to the bipolar terminal electrodes by conductors for each element and laid on the roof in a short-circuited state, and then the connecting conductor for short-circuiting is removed to make a desired connection. The method for constructing a roof material for photovoltaic power generation according to claim 3, wherein a conductor for the method is connected.