JP3507126B2 - Horizontal roof unit with solar cells - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a side-roof roof unit with a solar cell, and more particularly to a side-roof roof unit with a solar cell which has good rain protection and is highly reliable.

[0002]

2. Description of the Related Art In recent years, people's awareness of ecology has increased and expectations for solar cells, which are clean energy, have been increasing. In Japan as well, many studies have been conducted with the aim of popularizing solar cell photovoltaic power generation systems. In addition, the system for construction and operation of solar power generation systems has been relaxed, and 199
The system for the grid-connected reverse power flow system has also been established since April 3rd.

Under such circumstances, solar cells are installed on the roof of houses. Recently, for example, as described in JP-A-57-68454, a roof material such as a slate roof tile in which a solar cell is integrally incorporated is partially overlapped one by one like a normal roof tile. It has been proposed to install a solar cell on the entire roof surface by roofing the roof surface from below to above.

Further, in the roof unit with a solar cell described in Japanese Patent Publication No. 4-67349, a plurality of roof units with a solar cell are laid on a roof plate, and the upper and lower ends of the roof unit are folded and folded one after another. Along with stacking, solar cells are electrically connected in series vertically via rod-shaped electrodes,
It is designed to prevent rain leaks at the connections. Furthermore,
In the roof unit with a solar cell described in Japanese Examined Patent Publication No. 5-31832, the solar cell is laid on the base plate on which the pier is arranged,
In addition, a structure has been proposed in which the upper and lower solar cells are connected to each other with a conductive rubber so as to protect them from rain.

[0005]

However, in the case of the technique described in Japanese Patent Laid-Open No. 57-68454, a concave groove for embedding a solar cell must be formed in a slate roof tile in which the solar cell is integrally incorporated. The work process was complicated. In addition, when the solar cell is embedded in the concave groove, because the sealing between the solar cell and the concave groove is not sufficient, rain seeps into the cells of the solar cell with time, which causes deterioration of the performance of the solar cell. Become. Moreover, since the proportion of the solar cell area of the slate tile is small, the proportion of solar cells that can be laid on the roof of a certain area is small. Other,
When the size of the slate roof tile is increased, the weight becomes heavier, and the slate roof tile is easily cracked and the workability of the laying work is significantly deteriorated. Therefore, the size of the slate roof tile cannot be increased. Therefore, there is a problem that the non-power generation region is further increased.

Further, in the roof unit with a solar cell described in Japanese Patent Publication No. 4-67349, since the solar cell is provided up to the connection end, there is a risk that the solar cell will be damaged by the folding. In addition, since the solar cells are connected at the interlocking part, poor contact is likely to occur and long-term reliability is poor. Furthermore, the solar cells facing the purlin must be installed at intervals so as not to electrically short-circuit each other, and it is necessary to prepare a special "joint plate" and "cover plate" having an insulating mechanism.

Further, in the roof unit with a solar cell described in Japanese Patent Publication No. 5-31832, connection failure occurs due to deterioration of the conductive rubber. Also, because the solar cell is only covered up to the middle of the substrate and the connection electrodes are exposed,
There has been a problem that the electrode is deteriorated and a contact failure is likely to occur due to the deterioration. An object of the present invention is to provide a thatched roof unit with a solar cell, which is easy to install and has high long-term reliability.

[0008]

According to the present invention, in order to solve the above problems, a solar panel having a face plate portion, an eaves side engaging portion and a ridge side engaging portion, and a solar cell on an upper surface thereof is provided. In a roof-mounted roof unit with solar cells in which a plurality of roof plates with batteries are laid and the solar cells are electrically connected to each other, the solar cells are embedded in a filler having elasticity and have a surface. It is protected by a weather-resistant transparent film, the eaves side engaging portion has a hanging portion hanging from the face plate portion and a lower side portion bent from the lower end edge of the hanging portion to the ridge side, the solar cell The embedded filler covers the entire area of the face plate portion, the eaves side engaging portion and the ridge side engaging portion, and the ridge side engaging portion has a rising portion raised from the face plate portion, The roof side of the ridge adjacent to the ridge side engaging part of the roof plate with solar cells on the eaves side Enclosed and engaged inside the side engaging portion, between the roof plate with the solar cell and the roofing material, the solar cell on the roof plate with the solar cell and the other adjacent to the purlin direction It has a space for passing wiring material that electrically connects the solar cells on the roof plate with solar cells,
A solar cell on one of the roof plates with solar cells and a solar cell on another roof plate with solar cells adjacent in the purlin direction are electrically connected to each other via the space portion. This can be achieved with a thatched roof unit.

In the above structure, it is preferable that one side edge of the roof plate with a solar cell and the side edge of the roof plate adjacent in the purlin direction are covered from above and below by the joint watering plate and the joint cover plate. . Further, the roof material is preferably a heat insulating material. Further, the solar cell is preferably an amorphous silicon solar cell formed on a flexible stainless steel substrate. The weather resistant transparent film is preferably an unstretched film. Furthermore, it is preferable that the filler in which the solar cells are embedded covers the entire area of the face plate portion, the eaves side engaging portion, and the ridge side engaging portion.

[0010]

In the horizontal roofing unit with a solar cell according to the present invention, the solar cell does not use glass as a surface protection material, and therefore the weight of the roof panel with a solar cell itself is light. Further, since there is no concern that the roof plate with the solar cell will be broken, the workability of installation on the roof will be improved. Further, since the solar cell itself has flexibility, there is no problem that the roof plate with the solar cell is cracked even if it is slightly bent. For this reason, the roof plate with solar cells can be roofed by the same simple process as that of a normal metal roof.

Further, since the solar cell is flexible, it is possible to bend the solar cell at the same time as the roof plate, and it is possible to fabricate side-roof roof units with solar cells of various shapes. Furthermore, since the solar cells on the roof materials adjacent to each other in the purlin direction are electrically connected to each other in the space between the roof panel with solar cells and the roof material below the roof panels, the electrical connection is made with the goby assembly section as in the conventional method. There is no contact failure at the connection part when the connection is made. Also, this electrical connection is made through the space,
That is, it is performed by passing the wiring through the space. Therefore, it is not necessary to make a hole in the roof material, and wiring between adjacent solar cells becomes easy. In addition, the connection member such as the wiring material and connector of the solar cell is not exposed to the outdoors, the connection member is hardly deteriorated, the contact failure does not occur, and the solar cell having excellent reliability can be provided.

Furthermore, since there is no electrical connection portion of the solar cell in the joint portion between the roof plate on the ridge side and the roof plate on the eaves side adjacent to each other,
Good rain finish. Further, since the polymer filler is provided on the surface of the roof plate of the seam assembly, the polymer filler serves as a packing having elasticity in the seam assembly, and the rain can be completely finished. Further, by using a structure in which a roof material having solar cells is covered with a polymer filler, it is possible to reduce rain noise, which is a drawback peculiar to a metal roof.

Further, when the roof plates adjacent to each other in the purlin direction are connected by a joint water plate and a joint cover plate as a rain proof structure, the roof plate and the solar cell are insulated by the polymer filler. , Tokuhei 4-6734
As described in 9 publication, it is not necessary to specially provide a water plate for joints and a cover plate for joints with an insulating mechanism for insulating solar cells from each other, and a water drain plate for joints and a joint cover plate having a simple structure are adopted. Therefore, the material cost can be reduced.

Further, when the heat insulating material is used for the roof material, the temperature rise of the amorphous silicon solar cell due to outdoor exposure is accelerated. Then, due to this temperature rise, the performance deterioration of the amorphous silicon solar cell is recovered, and as a result, the performance of the amorphous silicon solar cell can be improved. Furthermore, when the weather-resistant transparent film on the surface of the solar cell on the roof plate is composed of a non-stretched film, the shape can be made flexible, so even if the roof plate with the solar cell is folded into a side-roof shape, the film may break. There is no hurt.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described in detail with reference to FIG. FIG. 1 is an external view of a roof plate with a solar cell according to the present invention, which has a face plate section 1100, an eaves side engagement section 130, and a ridge side engagement section 140, and has a solar cell on the upper surface.
2 is a cross section taken along the line BB ′ in FIG. 1, and FIG. 3 shows a side-roof roof unit with a solar cell according to the present invention, which has a power frame 350.
It is the figure installed on the field board 340 as a roof material provided above. The roof plate 100 with a solar cell is fixed by a suspender 320 and a bolt 330. Further, FIG. 4 is a top view when a large number of the roof plates with solar cells are installed by using a joint watering board and a joint cover.

(Roof) Roof panel 10 with solar cell of the present invention
0 is a face plate portion 1100, one eaves side engaging portion 130,
The ridge-side engaging portion 140 is provided on the other side. The roof with a solar cell has a solar cell on at least the face plate portion 1100. The solar cell may also be attached to the eaves-side engaging portion 130 and the ridge-side engaging portion 140.

(Eaves side engaging part) The eaves side engaging part 130 refers to an engaging part installed on the eaves side when installed on the roof. The eaves side engaging portion 130 has a hanging portion 150 hanging from the face plate portion 1100 and a lower side portion 160 bent from the lower end edge of the hanging portion 150 toward the ridge. (Wing side engaging portion) The ridge side engaging portion 140 refers to an engaging portion installed on the ridge side of the roof, and has a rising portion 170 raised from the face plate portion 1100. The ridge side engaging portion 14 of the eaves side roof plate
0 is included in and engaged with the eaves side engaging portion 140 of the adjacent ridge side roof plate. With this structure, it is possible to provide a side-roof roof unit with a solar cell that has good rain protection.

In the roof with solar cells of the present invention, the entire surface of the roof plate is covered with a polymer filler in which the solar cells are embedded,
It is bent. Therefore, in the seam assembly portion of the ridge-side engaging portion 140 of the eaves-side roof plate and the eaves-side engaging portion 130 of the ridge-side roof plate, the elastic filler serves as packing. As a result, it is possible to achieve better rain protection than the rain protection structure of a thatched roof in a normal roof structure.

(Joint) The side edge of one roof plate having a solar cell and the side edge of the other roof plate adjacent to the purlin direction are composed of a joint water plate and a joint cover plate because of the rain-sealing structure. Covered. Here, in the present invention, since the roof plate and the solar cell are insulated by the polymer filler, the solar cell adjacent to the joint water plate and the joint cover plate is insulated from each other as described in Japanese Patent Publication No. 4-67349. It is not necessary to provide an insulating mechanism for this purpose. That is, it is possible to use a joint water plate and a joint cover plate having a simple structure, which is exactly the same as that of a normal thatched roof joint. And because the fitting can use exactly the same as a normal roof,
A roof with solar cells and a normal roof can be mixed to achieve a variety of roof design variations.

(Roofing Material) The roofing board used in the present invention is usually a roofing material. The base plate is not particularly limited as long as it is usually used as a roof base plate, but is preferably a plate having a heat insulating property. Specifically, mortar, wood wool cement board, plywood, wood chip cement board, polystyrene foam, polyurethane foam, polyethylene foam, glass wool, rock wool, and insulation board are preferable, and particularly preferable is thermal conductivity of 0.2 kcal / m, It is a field board having a temperature of hr ° C or lower.

The thermal conductivity is 0.2 kcal / m, h
When a heat insulating material at r ° C. or lower is used, the air between the roof plate with the solar cell and the roof material is warmed, and as a result, when the amorphous silicon solar cell is used as the solar cell, the performance of the amorphous silicon solar cell is deteriorated. It can be recovered, and as a result, the performance of the amorphous silicon solar cell can be improved.

(Roofing board) In the present invention, the ordinary roofing board used with the roofing board with solar cells is not particularly limited as long as it can be bent and can satisfy the function as a roof. Specifically, anti-corrosion treated steel plates such as hot dip galvanized steel plate and galvalume steel plate, special steel and non-ferrous metal, stainless steel plate, weather resistant steel plate, copper plate,
Aluminum alloy plate, lead plate, zinc plate, titanium plate, etc. can be used.

(Filler) Examples of the filler used in the present invention include ethylene-vinyl acetate copolymer (EV).
Examples thereof include, but are not limited to, A), polyvinyl butyrol, and silicone resin. Here, the thickness of the filler for burying the solar cell element is not particularly limited, but it is used for rainproofing the ridge-side engaging portion of the eaves-side solar cell and the eaves-side engaging portion of the ridge-side solar cell. In consideration of the fact that the filler plays the role of packing when assembled, 0.3
mm or more is preferable.

Further, even if the amount of the filler is larger than necessary, it causes an increase in the cost of the roof plate with a solar cell. Furthermore,
If the thickness of the filler is large, it is difficult to perform the bending process for the roof with the solar cell, and the bending conditions such as the bending pressure are not constant. In addition, when the thickness of the filler is large, the weather-resistant transparent film, which is a protective film for the filler, cannot withstand pulling during bending,
If the bending angle is large, the protective film of the filler will crack. For the reasons described above, the thickness of the filler is preferably 2 mm or less.

(Transparent Film) The weather-resistant transparent film of the solar cell used in the present invention preferably has an elongation of 250% or more in the direction in which the film extends by bending. If the elongation of the weather resistant film is less than 250%, cracks are likely to occur in the film at the bent portion during bending, which is not preferable. Here, if the weather-resistant film has even a small amount of cracks, the crack gradually spreads during the outdoor use of the solar cell, and eventually the film peels from the cracked portion. I will end up.

The type of the weather resistant transparent film is not particularly limited, but in consideration of weather resistance, mechanical strength and transparency, a fluororesin film is preferable, and a non-stretched ethylene-tetrafluoroethylene film is used. Copolymer films are more preferred. (Solar Cell Element) The solar cell element of the present invention is not particularly limited in type, but is preferably a flexible solar cell, and particularly preferably an amorphous silicon semiconductor formed on a stainless substrate. is there.

That is, since the amorphous silicon semiconductor formed on the stainless steel substrate can be thinned to a thickness of about 0.1 mm, the amount of the filler for filling the solar cell element can be reduced. Further, since the amorphous silicon semiconductor formed on the stainless steel substrate is flexible,
Even if a person walks on the roof plate with solar cells, the solar cells will not break. Further, by using the amorphous silicon semiconductor formed on the stainless steel substrate, the weight of the solar cell element can be reduced, and as a result, the thickness of the back reinforcing plate can be reduced and the material cost can be reduced.

FIG. 13 shows a schematic sectional view of an example of a solar cell element used for the roof plate with a solar cell of the present invention. This solar cell element 1300 includes a conductive substrate 1301, a back surface reflection layer 1302, and a semiconductor layer 130 as a photoelectric conversion member.
3 and a transparent conductive layer 1304. Here, the back surface reflection layer 1302 can also serve as the conductive substrate 1301.

The conductive substrate 1301 is not particularly limited, but a conductive substrate is preferable in view of bendability and impact resistance. As such a conductive substrate, for example, stainless steel, aluminum, copper, titanium, carbon sheet, steel sheet, polyimide having a conductive layer, polyester,
Examples thereof include resin films such as polyethylene naphthalide and epoxy, and ceramics.

The semiconductor layer 1303 is not particularly limited, but a compound semiconductor such as an amorphous silicon semiconductor, a polycrystalline silicon semiconductor, a crystalline silicon semiconductor, or copper indium selenide is suitable. In the case of amorphous silicon semiconductor,
It is formed by plasma CVD using silane gas or the like. In the case of a polycrystalline silicon semiconductor, a sheet of molten silicon or a heat treatment of an amorphous silicon semiconductor is formed.

The semiconductor layer 1303 has a pin structure.
Junctions, pn junctions and Schottky junctions are used. This semiconductor layer 1303 has at least the back electrode layer 1302.
And a transparent conductive layer 1304. A metal layer, a metal oxide, or a composite layer of a metal layer and a metal oxide layer is used for the back electrode layer 1302. The material of the metal layer includes Ti, Al, Ag,
Ni or the like is used, and ZnO, T is used as the metal oxide layer.
iΟ _2, such as SnΟ ₂ is used. The method of forming these metal layers and metal oxide layers includes resistance heating vapor deposition, electron beam vapor deposition, sputtering method, spray method, and CVD.
There is a law.

Further, a grid-shaped collector electrode (grid electrode) may be provided in order to efficiently collect the current generated by the photovoltaic power on the transparent conductive layer 1304. Materials for such grid electrodes include Ti, Cr, and M.
A conductive paste such as o, W, Al, Ag, Ni, Cu, Sn, and a silver paste is used, but is not limited thereto. As a method of forming the grid electrode, a vapor deposition method such as sputtering using a mask pattern, resistance heating, and CVD, a method of depositing a metal layer on the entire surface and then etching and patterning it, and a direct grid electrode pattern is formed by photo-CVD. Examples of the method include a method of forming a negative pattern mask of the grid electrode and then forming it by plating, and a method of forming a conductive paste by printing. Here, as the conductive paste, fine powdery gold, silver, copper, nickel, carbon, or the like dispersed in a binder polymer is usually used. Examples of the binder polymer include resins such as polyester, epoxy, acrylic, alkyd, polyvinyl acetate, rubber, urethane and phenol.

A bus bar for collecting and transporting the current collected by the grid electrode may be provided.
As a material for such a bus bar, tin, solder-coated copper, nickel or the like is used. The bus bar is connected to the grid electrode with a conductive adhesive or solder. (Bending of roof plate with solar cell) The method for bending the roof plate with solar cell is not particularly limited, but the surface of the roof plate with solar cell is usually a weather resistant film such as a fluororesin film, and the surface is scratched. Easy to get on. for that reason,
It is preferable to use a "bending machine" that bends the roof plate with solar cells, using a material that does not easily scratch the surface of the roof plate with solar cells. Specifically, for example, by placing the weather-resistant transparent film surface of the solar cell on a soft mold such as urethane resin, applying a force by applying a blade to the back reinforcing plate,
Can be folded.

(Electrical Connection) The solar cells are electrically connected to each other on the roof material adjacent in the purlin direction in the space between the roof plate and the roof material. As a connection method,
Usual electric connection methods such as a connector method, a crimp sleeve connection method, and a soldering connection method can be adopted.

By connecting in the space between the roof plate and the roofing material in this manner, it is possible to eliminate the contact failure of the connecting portion, which would occur when the electrical connection is made in the goby assembly. Further, since the wiring is passed through the space, it is not necessary to make a hole in the roofing material such as the base plate, and wiring between the adjacent solar cells becomes easy. Further, since the connecting members such as the wiring material and the connector of the solar cell are not exposed to the outdoors, it is possible to provide the solar cell-equipped horizontal thatched roof unit with almost no deterioration of the connecting member.

[0036]

The present invention will be described in detail below with reference to examples, but the present invention is not limited to these examples. (Example 1) In this example, a solar cell module in which amorphous silicon solar cell elements produced on a stainless steel substrate were connected in series, and a galvanized steel sheet was provided on the back surface,
This is an example in which a large number of roof plates with solar cells obtained by bending the structure into a horizontal thatched roof are installed on a heat insulating base plate, and the details will be described below.

First, the procedure for producing an amorphous silicon solar cell element will be described with reference to FIG. Washed 0.1
mm long stainless steel substrate (conductive substrate 13
01) on top of which Al containing 1% of Si (back surface reflection layer 13
No. 02) was formed into a film having a thickness of 5000Å by a sputtering method.
Next, the n / i / p type amorphous silicon semiconductor layer (semiconductor layer 1303) is used as an n type semiconductor, PH ₃ , SiH ₄ ,
H ₂ gas, SiH ₄ and H ₂ gas as i-type semiconductors, and B ₂ H ₆ , SiH ₄ and H as P-type semiconductors
_The n-type semiconductor layer is 300 Å and the i-type semiconductor layer is 4000 Å by plasma CVD method using ₂ gases respectively.
A p-type semiconductor layer of 100 Å was sequentially formed.

After that, ITO (transparent conductive layer 1304) having a film thickness of 800 Å is formed by resistance heating vapor deposition to form an amorphous silicon solar cell element (solar cell element 1300).
Was formed. Next, the long solar cell element manufactured as described above is punched into a shape as shown in FIG. It was made. Here, on the cut surface of the solar cell strip 1400 cut by the press machine, the solar cell strip 1400 is crushed and the IT0 electrode and the stainless steel substrate are short-circuited.

Then, in order to repair this short circuit, an element isolation portion 1411 is provided around the ITO electrode of each solar cell element as shown in FIGS. 14 and 15, and the ITO is separated by this element isolation portion 1411. The periphery of the electrode was removed. Specifically, this removal was performed as follows. First, an etching material (FeCl ₃ solution) having a selectivity that dissolves ITO but not an amorphous silicon semiconductor is screen-printed around the ITO slightly inside the cut surface of each solar cell strip 1400 to dissolve the ITO. Then, the element isolation portion 1411 of the ITO electrode was formed by washing with water.

Next, a grid electrode 14 for collecting current is formed on the ITO.
As No. 12, a silver paste using a polyester resin as a binder (Du Pon Company.
"5007") was formed by screen printing. Then, a tin-plated copper wire 1413, which is a collector electrode of the grid electrode 1412, was arranged in a form orthogonal to the grid electrode 1412. After that, at the intersection with the grid electrode 1412, as adhesive silver ink 1414, Emerson and Cumming (Emarson & Cuming, Inc.)
The product "C-220" was dropped and dried at 150 ° C / 30 minutes to connect the grid electrode 1412 and the tin-plated copper wire 1413. At that time, the tin-plated copper wire 141 is so arranged that the tin-plated copper wire 1413 does not come into contact with the end surface of the stainless steel substrate.
Polyimide tape was attached to the bottom of 3.

Next, a part of the ITO layer / a-Si layer in the non-power generation region of the above-mentioned solar cell strip made of an amorphous silicon solar cell element is removed by a grinder to expose the stainless steel substrate, and then the portion is removed. On copper foil 1
415 was welded with a spot welder. Next, the solar cell strip 1 is replaced with the solar cell strip 1 as shown in FIG.
401 tinned copper wire 1413 and solar cell strip 1
The copper foil 1415 of 402 was connected in series by soldering. Then, in the same manner, by soldering the tin-plated copper wire 1413 and the copper foil 1415 of the adjacent solar cell strips, the 13 solar cell strips 14
01, 1402, 1403, 1404, ... Are connected in series. Wiring for the plus and minus terminals was made on the back side of the stainless steel substrate of each solar cell strip.

FIG. 17 shows a rear surface wiring diagram of solar cell elements (solar cell strips) connected in series. The wiring on the plus side is such that the insulating polyester tape 4220 is attached to the center of the thirteenth solar cell strip 1404, the copper foil 4210 is attached, and then the copper foil 4210 and the tin-plated copper wire are soldered. I went by. Also,
The wiring on the minus side is the first solar cell strip 14
After connecting the copper foil 4230 to 01 as shown in FIG. 16,
The copper foil 4230 was soldered to the copper foil 4300 spot-welded to the solar cell strip 1401.

Next, as shown in FIG. 18, 0.8 mm
Galvanized steel sheet 1801 / EVA 1802 / thick solar cell element 1803 / EVA 1 connected in series
802/50 micron thick non-stretched ethylene-tetraethylene copolymer fluororesin film "Aflex (Asahi Glass)" made of fluororesin films 1804 are sequentially superposed, and EVA is melted at 150 ° C using a vacuum laminator. Then, a solar cell module 1800 sealed with an embedded resin was produced.

The fluororesin film 1804 is EV
In order to enhance the adhesion with A1802, the adhesion surface is previously subjected to plasma treatment. The solar cell element 1803 connected in series has a size slightly smaller than the zinc steel plate and the fluororesin film 1804 on the back surface because the end of the solar cell module 1800 is bent in a later step. Furthermore, the fluororesin film 18 used in this example
The tensile elongation of No. 04 was 250% or more.

Next, the solar cell module produced as described above is bent into a shape as shown in FIG.
A roof panel with solar cells was obtained. That is, in the eaves side engaging portion, it hangs from the face plate portion 1620 of the solar cell (the hanging portion 162).
1) and bend inwardly at an acute angle (lower side 163
0), and further folded back to the eaves side (folded portion 164
0). Further, in the ridge-side engaging portion, the surface plate portion 1620 on which the solar cell is attached rises 90 degrees (the rising portion 16
50) and folding to the eaves side (folding portion 166
0), and the end was folded further toward the ridge (folded part 1
670). Here, roof panel 1600 with solar cells on the eaves side
The engagement between the ridge-side engaging portion and the eaves-side engaging portion of the roof-side roof plate with a solar cell 1700 on the ridge side was performed as shown in FIG.

In the above-mentioned engaging portion, the rain shunt is a junction 171 between the face plate portion 1620 of the roof plate with solar cell 1600 and the hanging portion 1721 of the roof plate with solar cell 1700.
0, and at the contact surface 1720 in the engagement portion. Here, EVA having elasticity is used as a filler for the solar cell.
Is used and its thickness is 2 mm. This made the dance even better.

The electrical connection between the adjacent solar cells was made in the space between the roof plate with solar cells and the heat insulating base plate. By this method, the reliability of electrical connection between the solar cells adjacent to each other in the purlin direction could be improved. FIG. 6 shows a diagram in which a plurality of roofs with solar cells according to the present embodiment are laid on a base plate. Roof plate 6010 with solar cells,
In 6020, 6030, and 6040, the ridge-side engaging portion and the eaves-side engaging portion of the adjacent roofs are engaged with each other, and the ridge-side engaging portions are bolts 6 to the field board 6200 by the suspenders 6400.
It is fixed at 500. Here, 6300 is a strength bone. In addition, this base plate 6200 has a rigid urethane foam of 50 mm thickness (heat conductivity: 0.022 mh ° C / kc
al) was used.

A joint for rain protection was connected between the roof plates with solar cells adjacent to each other in the direction of the main building. FIG. 7 is an external view of a joint cover plate 7010 that covers the surface of a solar cell roof adjacent to the purlin direction, and FIG. 8 is an external view of a joint watering plate 7020 that functions as a rain shield on the back side. Indicated. Further, FIG. 9 is a cross-sectional view in the sloping direction when the joint cover plate 7010 and the joint water-cutting plate 7020 are attached to the roof plate with a solar cell adjacent to the purlin direction, and FIG. 10 is a cross-sectional view in the purlin direction. is there. The wiring material (cable) for connecting the adjacent roof plates with solar cells is 310 in FIG. 3 and 1610 in FIG.
6100 in FIG. 6, 8400 in FIGS. 10 and 11,
Shown respectively.

In this embodiment, an amorphous silicon solar cell vapor-deposited on a stainless substrate is embedded in EVA. Moreover, the zinc steel plate and the solar cell on the back surface also have an insulating structure. Therefore, even if the adjacent roof plates with solar cells contact each other, the adjacent solar cells are not electrically short-circuited. Therefore, as the joint for connecting the roof with the solar cell of the present embodiment, a metal joint exactly the same as the metal joint used for the joint of the general metal roof could be used.

(Example 2) With the solar cell roof plate of this example, a solar cell module was prepared in the same manner as in Example 1, and this solar cell module was bent as shown in FIG. That is, in the roof plate with solar cell 8010 of the present embodiment, the eaves side engaging portion 8011 is hung from the face plate portion 8020 of the solar cell (hanging portion 8030), and further bent inward at an acute angle (lower side portion 8040). , Droop 80
It is folded back in parallel with 30 (folded back portion 8050), and is further erected on the ridge side in parallel with the hanging portion 8030 (standing up portion 8060). Further, the ridge-side engaging portion is raised 90 degrees from the face plate portion having the solar cell (the rising portion 811).
0), and then bent to the ridge side at an obtuse angle (folded portion 812
0) After that, it rises in parallel with the rising portion 8110 (raising portion 8130) and the tip is folded back to the eaves (folding portion 8140).

Here, the engagement between the ridge-side engaging portion of the roof panel 8100 with solar cells and the eaves-side engaging portion 8011 of the roof panel 8010 with solar cells on the ridge side is engaged in the form as shown in FIG. It matched. In this engaging portion, the rain cover is a face plate of the roof plate 8100 with solar cells on the eaves side, and this filling material serves as packing, so that the rain-covered solar cell element 1803 is galvanized steel plate as compared with a normal side-roof roof. And the unstretched fluororesin film, at the joining point 8700 between the section and the hanging portion 8050 of the roof plate with solar cell 8010 on the ridge side, and at the joining surface 8710 in the engaging section. In the figure, 8200 is a suspension, 8300 is a bolt, 850
0 is a seat and 8600 is a base plate.

Also in this embodiment, since EVA having elasticity is used as the filling material of the solar cell, this filling material serves as a packing, and the rain proofing is excellent as compared with the usual thatched roof. It became a structure. In addition, in the present example, the roof panel with a solar cell described above could be used to make a thatched roof as shown in FIG. Here, the hatched roofs are solar cell roofs 8011 and 8012, and the colorless roof 8700 between them is a roof that is covered with a normal zinc-copper plate. Here, the joint between the roof with the solar cell and the roof plate without the solar cell was not a special joint but a joint used for a general thatched roof.

As described above, in this embodiment, since the roof with the solar cell is mixed with the normal thatched roof, even a small amount of the solar cell can be installed evenly on the entire surface of the roof, and the solar cell is excellent in appearance. The attached roof could be installed.

[0054]

EFFECTS OF THE INVENTION According to the side-roof roof unit with a solar cell of the present invention, the following effects can be obtained. (1) Since the surface protective material of the solar cell is not glass, the roof plate with the solar cell is light, and there is no fear of cracking, so installation workability on the roof is good. In addition, the solar cell itself is bendable and will not break. Therefore, the roof with a solar cell can be roofed in a simple process, and the roofing process becomes simple.

(2) The solar cell is bendable, and the solar cell can be bent at the same time as the roof plate, so that side-roof roof units with solar cells of various shapes can be manufactured. (3) Since the solar cells are electrically connected to each other in the space between the roof plate with the solar cells and the roofing material, the contact failure of the connection can be eliminated. Moreover, since the wiring is passed through the space, wiring between adjacent solar cells becomes easy. Further, since the wiring material of the solar cell and the connecting material such as the connector are hardly deteriorated, the solar cell having excellent reliability can be provided.

(4) Since there is no solar cell electrical connection part in the joint between the roof plate on the ridge side and the roof plate on the eaves side adjacent to each other,
Good rain finish. Further, the polymer filler on the surface of the roof plate of the seam assembly functions as a packing having elasticity in the seam assembly, so that the rain finish can be further perfected. (5) Since the roof material having the solar cell is covered with the polymer filler, the rain noise, which is a drawback peculiar to the metal roof, can be reduced.

(6) When the roof plates adjacent to each other in the purlin direction are connected to each other as a rain-sealing structure by a joint water cut plate and a joint cover plate, the joint water cut plate and the joint cover plate having a simple structure are used. Since it can be adopted, the material cost can be reduced. (7) If a heat insulating material is used for the roofing material, the temperature rise of the amorphous silicon solar cell due to outdoor exposure is accelerated, the performance deterioration of the amorphous silicon solar cell is recovered, and the performance of the amorphous silicon solar cell is improved. it can.

(8) Since the weather-resistant transparent film on the surface of the solar cell on the roof plate is a non-stretched film, even if the roof plate having the solar cell is bent in a sideways shape, the film may be cut or damaged. There wasn't.

[Brief description of drawings]

FIG. 1 is a perspective view of a roof plate with a solar cell according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of a roof plate with a solar cell according to an embodiment of the present invention.

FIG. 3 is a cross-sectional view of a side-roof roof unit with a solar cell according to an embodiment of the present invention.

FIG. 4 is a top view of a roof side-roof roof unit with a solar cell according to an embodiment of the present invention.

FIG. 5 is a cross-sectional view of a roof plate with a solar cell according to an example of the present invention.

FIG. 6 is a cross-sectional view of a lateral thatched roof unit with a solar cell according to an embodiment of the present invention.

FIG. 7 is a perspective view of a joint cover plate used in the horizontal roofing roof unit with a solar cell according to the embodiment of the present invention.

FIG. 8 is a perspective view of a joint watering board used in a horizontal roofing roof unit with a solar cell according to an embodiment of the present invention.

FIG. 9 is a cross-sectional view of the joint portion of the horizontal roofing roof unit with a solar cell according to the embodiment of the present invention, taken along the direction of the sag.

FIG. 10 is a cross-sectional view in the purlin direction of a horizontal thatched roof unit with a solar cell according to an example of the present invention.

FIG. 11 is a cross-sectional view in the purlin direction of a horizontal thatched roof unit with a solar cell according to another embodiment of the present invention.

FIG. 12 is a top view of a side-roof roof unit with a solar cell according to another embodiment of the present invention.

FIG. 13 is a cross-sectional view of a solar cell element used in a roof unit with a solar cell according to an example of the present invention.

FIG. 14 is a top view of a solar cell strip according to an embodiment of the present invention.

FIG. 15 is a cross-sectional view of a solar cell strip according to an embodiment of the present invention.

FIG. 16 is an explanatory diagram showing a state in which the solar cell strips according to the examples of the present invention are connected in series.

FIG. 17 is an explanatory diagram on the back surface of the state where the solar cell strips of the examples of the present invention are connected in series.

FIG. 18 is a diagram showing a solar cell module according to an example of the present invention, in which (a) is a plan view and (b) is a sectional view.

[Explanation of symbols]

100 solar roof 130 eaves side engaging part 140 building side engaging part 150 hanging parts 160 Lower part 170 Rise 1100 Face plate 1300 Solar cell element 1301 conductive substrate 1302 Back reflective layer 1303 semiconductor layer 1304 Transparent conductive layer 1400 solar cell strip 1411 Element isolation part 1412 Grid electrode 1413 Tinned copper foil 1414 silver ink 1415 copper foil 1600 Roof panel with solar cells 1620 Face plate 1700 Roof panel with solar cells 1710 junction 1720 contact surface 1800 solar cell module 1801 Galvanized steel sheet 1802 EVA 1803 Solar cell element 1804 Fluororesin film 4210 copper foil 4220 Insulating polyester tape 4230 copper foil 4300 copper foil 6010 Horizontal mushroom roof 6020 thatched roof 6030 thatched roof 6040 thatched roof 6200 Base plate 6300 strength 6400 suspension 7010 Joint cover plate 7020 Water plate for joint 8010 Roof with solar cells 8011 eaves side engaging part 8020 Face plate 8050 hanging part 8100 Roof with solar cells 8700 junction 8710 Bonding surface

─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Seiki Itoyama 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. (72) Inventor Fumitaka Toyomura 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Incorporated (72) Inventor Takashi Otsuka 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. (72) Inventor Kimitoshi Fukae 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. ( 56) References JP 59-152670 (JP, A) JP 61-287278 (JP, A) JP 6-85306 (JP, A) JP 60-173257 (JP, A) JP SHO 61-287277 (JP, A) ACTUAL SHO 63-50146 (JP, U) ACTUAL HAI 2-20625 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) H01L 31 / 04 E04D 13/18

Claims (6)

(57) [Claims] 1. A roof plate, a face plate portion, an eaves side engaging portion, and a ridge side.
With a solar cell that has an engaging part and a solar cell on the upper surface
Multiple roof plates are laid and the solar cells are electrically connected to each other.
Smell thatched roof unit with solar cells connected to
hand, The solar cell is embedded in a filler having elasticity.
With the surface protected by a weather-resistant transparent film
Cage, The eaves side engaging portion is a hanging portion and a hanging portion hanging from the face plate portion.
It has a lower side part bent from the lower edge of the part to the ridge side,The filling material in which the solar cell is embedded is the face plate portion and the eaves side.
The entire area of the engaging portion and the ridge-side engaging portion is covered. , The ridge-side engaging portion is a rising portion raised from the face plate portion.
Have The ridge side engaging part of the roof plate with solar cells on the eave side is adjacent
Enclosed and engaged inside the eaves side engagement part of the ridge side roof plate
Tori, Between the roof panel with solar cells and the roofing material, the thick
Solar cells on the roof plate with positive battery and others adjacent to the purlin
Of the solar cell on the roof panel with
Has a space for passing the continuous wiring material, On one of the roof plates with solar cells through the space
Roof panels with solar cells and other solar cells adjacent to the purlin direction
Characterized by being electrically connected to the above solar cell
A thatched roof unit with solar cells. 2. The solar cell roof plate with one side edge and the side edge of the roof panel adjacent in the purlin direction are covered from above and below by a joint watering plate and a joint cover plate. A side-roof roof unit with a solar cell according to claim 1. 3. The side-roof roof unit with a solar cell according to claim 1, wherein the roof material is a heat insulating material. 4. The thatched roof unit with a solar cell according to claim 1, wherein the solar cell is an amorphous silicon solar cell formed on a flexible stainless steel substrate. 5. The side-roof roof unit with a solar cell according to claim 1, wherein the weather-resistant transparent film is an unstretched film. 6. A solar cell with horizontal-roofing roof unit according to claim 1 to 5, wherein said solar cell is bendable.