JP2000244001A - Solar battery module, roof with solar battery, photovoltaic power generation system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a solar battery module having an improved fire protecting and proofing ability. SOLUTION: A solar battery module having at least a photovoltaic element 101 and a rear surface coating material 105 has such a terminal leading-out structure that a terminal is led out from the terminal leading-out hole 106 of the coating material 105 provided in a part where the photovoltaic element 101 does not exist through a conductive member 104 electrically connected to the photovoltaic element 101. The conductive member 104 covers the whole surface of the terminal leading-out hole 106 on the light receiving surface side of the hole 106.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solar cell module, and more particularly to a solar cell module characterized by having improved fire resistance.

[0002]

2. Description of the Related Art Conventionally, awareness of environmental issues has been increasing worldwide. Above all, there is a serious concern about the global warming phenomenon associated with CO ₂ emission, and the demand for clean energy is increasing more and more. At present, solar cells are promising as a clean energy source because of their safety and ease of handling.

[0003] In recent years, various types of solar cell modules have been proposed. Among them, from the viewpoint of emphasizing higher ease of installation, economy, and design, technology related to so-called solar cell-integrated roofing material, which has deviated from the method of installing on an existing roof and incorporates solar cells into the roofing material itself Development is taking place. Conventionally, such a solar cell can incorporate a solar cell module as it is in a place where a roof material is covered, and various developments have been made.

[0004] FIG. 10 is a schematic diagram showing a finished product when a solar cell module integrated with a roof material is laid on a roof surface. In the figure, 1001 is a photovoltaic element, 1002
Is a solar cell module. Since the roofing material itself is integrated with the solar cell, a mounting frame is not required and the cost is excellent, and the appearance is good. Therefore, the solar cell module is promising as a future solar cell module.

[0005] In the above-described solar cell module, a terminal taking-out position for taking out power of the photovoltaic element may be provided in a place where the photovoltaic element is not provided.

FIG. 11 shows an example of a solar cell module in which a terminal take-out position is provided at a place where no photovoltaic element is provided. In the figure, 1101 is a photovoltaic element, 1102 is a terminal box, 1103 is a cable for extracting power. The solar cell module as shown in FIG.
When electrical connection is made on the eaves side or the ridge side when installed as a roofing material, the terminal box 1102 is arranged on the eaves side or the ridge side without the photovoltaic element 1101 to make the terminal box 110
The workability of electrical connection by the power take-out cable attached to 2 can be improved.

FIG. 12 shows a second example of a solar cell module in which the terminal take-out position is similarly provided at a place where no photovoltaic element is provided. FIG. 12A shows another example of a solar cell module in which a terminal extraction position is provided at a place where no photovoltaic element is provided, and FIG. 12B shows a case where the terminal box is provided at a place where no photovoltaic element is provided. FIG. 2 is a schematic cross-sectional view illustrating a state where a solar cell module is disposed on a roof surface. In the figure, reference numeral 1201 denotes a photovoltaic element, 1202 denotes a terminal box, 1203 denotes a power take-out cable, 1204 denotes a cover between roofing materials, 1205 denotes a roof surface, and 1206 denotes a fixing member. In the solar cell module as shown in FIG. 12, the terminal box 1202 is arranged on the bent upper part of the roofing material, so that the bottom surface of the roofing material is directly in contact with the roof surface 1205 without using a pier or the like. And the construction work can be simplified.

[0008] As described above, depending on the form of the roofing material, the terminal extraction position of the solar cell module may be provided at a portion where no photovoltaic element is provided.

[0009]

FIG. 13 is a schematic view for explaining the structure of a terminal extraction portion of a solar cell module in which the terminal extraction position is provided at a portion where no photovoltaic element is provided. FIG. 13A is a schematic diagram of a solar cell module in which a terminal extraction position is provided at a portion where no photovoltaic element is provided, FIG. 13B is a schematic cross-sectional view of a terminal extraction portion, and FIG. 13C is a terminal extraction. It is a top view of a part.

In the figure, reference numeral 1301 denotes a photovoltaic element;
02 is a terminal box, 1303 is a power take-out cable, 1
304 is a conductive member, 1305 is a back surface covering material, 1306 is a hole for taking out a terminal, 1307 is a surface covering material, and 1308 is a filler.

[0011] As shown in the figure, by extending the conductive member 1304, it is possible to take out a terminal without the photovoltaic element 1301. In order to perform terminal removal, the terminal removal holes 13
06, the conductive member 1304 is extended to the terminal extracting hole 1306, and a terminal box 1302 is provided on the back side of the solar cell module so as to cover the terminal extracting hole 1306. With conductive member 130
4 and the power take-out cable 1303 are electrically connected. As described above, the position where the photovoltaic element 1301 is taken out of electricity can be provided in a portion where the photovoltaic element 1301 is not provided.

The above-mentioned solar cell module is often used as a roof material. If a neighboring house is burned, the first thing affected by a fire is the wall and roofing material of the house, and especially the roofing material tends to spread first on the eaves side. When the solar cell module takes out the terminals as shown in FIG. 13, if the flame is very strong, a spark jumps onto the surface covering material 1307 of the roof material, and in some cases, the surface covering material 1307 of the roof material and the filler 1308. May be burned and the fire spreads to the terminal extraction hole 1306 in some cases. As shown in FIG.
06 is larger than the conductive member 1304, and when there is a gap between the terminal extracting hole 1306 and the conductive member 1304 when viewed from the light receiving surface, the filler 1308 in the gap is burned,
As the fire progresses further, the flame may reach the space between the roofing material and the ground board.

[0013]

Means for Solving the Problems As a result of intensive research and development to solve the above problems, the present inventor has found that the following solar cell module is the best.

That is, the present invention relates to a solar cell module having at least a photovoltaic element and a back surface covering material, wherein the back surface covering material provided in a portion where the photovoltaic element is not provided has a terminal extracting hole. It has a structure to take out a terminal through a conductive member electrically connected to the photovoltaic element, has a non-combustible material on the light receiving surface side of the terminal taking-out hole, and the non-combustible material is used for the terminal taking out A solar cell module characterized by covering the entire surface of the hole,
And a photovoltaic module having at least a photovoltaic element and a back surface covering material, wherein the photovoltaic element and the electric power are supplied through a terminal extraction hole of the back surface covering material provided in a portion where the photovoltaic element is not provided. A terminal having a structure in which the terminal is taken out through an electrically connected conductive member, wherein the conductive member covers the entire surface of the terminal taking out hole on the light receiving surface side of the terminal taking out hole. It is a battery module.

Further, the present invention provides a roof with solar cells, wherein the solar cell module is arranged on a roof surface.

Further, the present invention is a photovoltaic power generation system characterized in that the photovoltaic power generation system is constructed by the above-mentioned solar cell module or the above-mentioned roof with solar cells.

In the present invention, the back surface covering material is preferably a non-combustible material, more preferably a metal steel plate.

It is preferable that the conductive member is a copper foil.

Preferably, the back cover is bent, and the non-combustible material or the conductive member is bent together with the back cover in the bent portion. More preferably, it is provided in a vertically bent portion.

Further, it is preferable that a surface coating material is provided on the light receiving surface side, and the surface coating material is a weather-resistant transparent resin.

According to the present invention, since the non-combustible material or the conductive member covers the terminal extracting hole of the back surface covering material,
Even if the flame from the jump fire spreads on the surface of the solar cell module, it is difficult for the flame to reach the lower side of the solar cell module (the space between the solar cell module and the base plate) through the hole for removing the terminal, thus suppressing the spread of fire. can do.

[0022]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 14 is a schematic diagram for explaining the structure of a terminal extracting portion of a solar cell module in which a terminal extracting position according to the present invention is provided in a portion having no photovoltaic element. FIG. 14A is a partial schematic view of a solar cell module in which a terminal extraction position is provided in a portion without a photovoltaic element, and FIG. 14B is a schematic cross-sectional view of a terminal extraction section. In the figure, 1401 is a photovoltaic element, 1402 is a terminal box, 1
403 is a power takeout cable, 1404 is a conductive member, 1405 is a back surface covering material, 1406 is a filler, 140
7 is a surface coating material, 1408 is a non-combustible material, and 1409 is a hole for taking out a terminal.

As shown in the figure, in order to perform terminal extraction at a portion where the photovoltaic element 1401 is not provided, the photovoltaic element 14
Conductive member (electric wire in this example) 14 electrically connected to 01
04 is extended to a portion where the photovoltaic element 1401 is not provided, and a terminal extracting hole 1409 is previously formed on the back surface covering material 1405 so that the terminal extracting hole 1409 is arranged in the extended portion. Then, when the solar cell module is integrally molded, the non-combustible material 1408 is laminated on the terminal extracting hole 1409. At this time, the non-combustible material 1408 has a size sufficiently larger than the terminal extracting hole 1409 and covers the entire surface of the terminal extracting hole 1409 during lamination. After integral molding, the conductor of the power extraction cable 1403 is electrically connected to the conductor of the conductive member 1404, and the terminal box 1
402 can be bonded and fixed on the back surface covering material 1405 (on the back surface side) to form a terminal extraction portion.

Since the non-combustible material 1408 covers the entire surface of the terminal extracting hole 1409 as described above, even if the flame reaches the terminal extracting hole 1409 due to the spread of fire due to a spark, the non-combustible material 1408 and the field plate below the solar cell module may not be connected. It is difficult for the flame to spread to the space.

FIG. 1 is a schematic diagram for explaining the structure of a terminal extracting portion in another example of a solar cell module in which the terminal extracting position of the present invention is provided in a portion having no photovoltaic element. FIG. 1A is a partial schematic view of a solar cell module in which a terminal extraction position is provided in a portion where no photovoltaic element is provided.
FIG. 1B is a schematic cross-sectional view of a terminal extracting portion, and FIG. 1C is a top view of the terminal extracting portion. In the figure, 101 is a photovoltaic element, 102 is a terminal box, 103 is a power take-out cable, 104 is a conductive member, 105 is a back cover material, 10
Reference numeral 6 denotes a terminal extraction hole, 107 denotes a surface coating material, and 108 denotes a filler.

As shown in the figure, in order to take out a terminal at a portion without the photovoltaic element 101, a conductive member 104 electrically connected to the photovoltaic element is extended to a portion without the photovoltaic element. Terminal extraction hole 10 in the extended part
A hole 106 for taking out a terminal is previously formed on the back surface covering material 105 so that 6 is disposed. The hole position and the hole diameter are set so that the conductive member 104 covers the terminal extracting hole. After integrally molding the solar cell module, the conductive member 104 in the terminal extracting hole 106 is
By electrically connecting the conductors of the cable 106 for terminal extraction, the terminal box 102 is bonded and fixed on the back surface covering material 105 (back surface side), and the terminal extraction portion can be manufactured.

As described above, since the conductive member 104 covers the terminal extraction hole 106, even if the fire reaches the terminal extraction hole due to the spread of fire due to a spontaneous fire, the fire extends to the space between the ground plate and the solar cell module. Makes it difficult to spread the fire.

Next, a method for manufacturing a solar cell module will be described.

FIG. 2 is a schematic diagram for explaining a method of manufacturing a solar cell module according to the present invention. FIG. 2 is a schematic diagram for explaining a process of laminating each material constituting the solar cell module. FIG. 2B is a schematic cross-sectional view of the solar cell module after integral molding, and FIG. 2C is a schematic cross-sectional view of the solar cell module after forming a terminal extraction portion.

In FIG. 2, reference numeral 201 denotes a photovoltaic element;
02 is a filler, 203 is a surface covering material, 204 is a back surface covering material, 205 is a conductive member, 206 is a terminal extraction hole,
07 is a terminal box, 208 is a power take-out cable, 20
9 is a soldering part, 210 is a lead-in electric wire.

First, the filler 202 and the conductive member 2 are placed on the back cover 204 on which the terminal extraction holes 206 are formed.
The photovoltaic element 201 electrically connected to the photovoltaic element 201, the filler 202, and the surface covering material 203 are laminated in this order (FIG. 2).
(A)), by evacuating and heating the filler 20
2 are crosslinked and integrally molded to produce a solar cell module (FIG. 2B). At this time, the conductive members 2
05 and the position of the terminal extracting hole 206 formed on the back surface covering material 204, and the diameter of the terminal extracting hole 206 is larger than the width of the conductive member 205 when viewed from the light receiving surface side. The size is reduced so that the conductive member 205 covers the entire surface of the terminal extracting hole 206.

Next, the electric wire 210 is soldered (209) to the conductive member 205 in the terminal taking-out hole 206 of the solar cell module after the integral molding. After that, the terminal box 207 to which the power take-out cable 208 is attached is adhesively fixed to the terminal take-out portion from the back side of the solar cell module. At this time, the terminal box 207 has an opening on the bonding surface side, and the lead-in wire 210 is
Is inserted into the terminal box 207. And finally terminal box 2
In 07, the lead-in wire 210 and the conductor of the power takeout gable 208 are electrically connected, the terminal box 207 is covered, and a solar cell module terminal takeout is produced (FIG. 2).
(C)).

Next, each material constituting the solar cell module used in the present invention will be described.

[Solar Cell Element] The photovoltaic element in the present invention is not particularly limited, but is preferably a photovoltaic element having flexibility. For example, a semiconductor photoactive layer as a light conversion member is formed on a conductive gas. FIG. 3 shows a schematic configuration diagram as an example, in which 301 is a conductive substrate, 302 is a metal electrode layer,
303 is a semiconductor photoactive layer, 304 is a transparent conductive layer, 305
Is a collecting electrode.

The conductive substrate 301 serves as a substrate for the photovoltaic element and also serves as a lower electrode. Materials include silicon, tantalum, molybdenum, tungsten,
Examples include stainless steel, aluminum, copper, titanium, carbon sheets, lead-plated steel sheets, resin films having a conductive layer formed thereon, and ceramics.

The metal electrode layer 3 is formed on the conductive substrate 301.
As 02, a metal layer, a metal oxide layer, or a metal layer and a metal oxide layer may be formed. In the metal layer,
For example, Ti, Cr, Mo, W, Al, Ag, Ni, or the like is used. For the metal oxide layer, for example, ZnO, Ti
O ₂ , SnO ₂ or the like is used. The metal electrode layer 302
Are formed by a resistance heating evaporation method, an electron beam evaporation method, a sputtering method and the like.

The semiconductor photoactive layer 303 is a portion that performs photoelectric conversion, and specific materials include pn junction type polycrystalline silicon, pin junction type amorphous silicon, and CuInS.
e ₂ , CuInS ₂ , GaAs, CdS / Cu ₂ S, Cd
S / CdTe, CdS / InP, CdTe / Cu ₂ Te
And other compound semiconductors. As a method of forming the semiconductor photoactive layer 303, in the case of polycrystalline silicon, a sheet of molten silicon or heat treatment of amorphous silicon is used. In the case of amorphous silicon, plasma CVD using silane gas or the like is used. Examples include ion plating, ion beam deposition, vacuum evaporation, sputtering, and electrodeposition.

The transparent conductive layer 304 functions as an upper electrode of the photovoltaic device. As a material to be used, for example, In ₂ O ₃ , SnO ₂ , In ₂ O ₃ —SnO ₂ (IT
O), ZnO, TiO ₂ , Cd ₂ SnO ₄ , and a crystalline semiconductor layer doped with a high concentration of impurities. As a forming method, resistance heating evaporation, sputtering, spraying, CVD,
There is an impurity diffusion method and the like.

On the transparent conductive layer 304, in order to efficiently collect current, a grid-like current collecting electrode 305 (grid)
May be provided. As a specific material of the current collecting electrode 305, for example, Ti, Cr, Mo, W, Al, Ag, N
i, Cu, Sn, or a conductive paste such as a silver paste. As a method for forming the current collecting electrode 305, sputtering using a mask pattern, resistance heating, a CVD method, a method in which an unnecessary portion is removed by etching after depositing a metal film over the entire surface, and a patterning method using photo-CVD, are used. There are a method of forming a current collector electrode pattern, a method of forming a negative pattern mask of a current collector electrode pattern and then plating, and a method of printing a conductive paste. As the conductive paste, one obtained by dispersing silver, gold, copper, nickel, carbon, or the like in fine powder form 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.

In general, when a solar cell is used, it is preferable that the cell is lightweight from the viewpoint of workability. In addition, there is an increasing need for solar cell modules in which the solar cell is integrated with the roofing material, or in the type that is installed on the outer wall of a building. It is required to be. On the other hand, a thin-film semiconductor photovoltaic element formed on a stainless steel substrate is very suitable. That is, the photovoltaic element itself can be considerably thinned, and the thickness of the photovoltaic element including the substrate is 0.1 mm.
Because the thickness can be reduced to about 1 mm, the amount of the filler for sealing the photovoltaic element can be reduced. As a result, the weight of the solar cell can be reduced, and the thickness can be reduced. If the thickness can be reduced, the stress on the surface coating material when the solar cell is bent can be reduced. Cracking of the coating material can be suppressed against tension, and twisting of the coating material can be suppressed against shrinkage. In addition, since the solar cell is formed on a stainless steel substrate and has flexibility, unnecessary rigidity is not required for the solar cell, so that the thickness of the filler or the covering material can be reduced. As a result, the weight of the solar cell can be reduced, and the solar cell can be made flexible and flexible and suitable for bending.

Therefore, it is understood that the thin film semiconductor formed on the stainless steel substrate is most suitable for the photovoltaic element.

[Surface Coating Material] The characteristics required for the surface coating material are that it has light-transmitting properties and weather resistance, and that it is difficult for dirt to adhere thereto. Although translucent glass and organic resin can be used as the material, it is convenient if the solar cell itself can be bent in order to handle the solar cell in the same way as a general roofing material. Preferably, it is a flexible material.

For the above reasons, an organic resin, more preferably a weather-resistant transparent film, is preferably used for the surface coating material. By using a weather-resistant transparent film, the filling property is improved, the weight can be reduced, and it is not cracked by impact,
It can be used as a roofing material by bending. Further, by giving an embossing treatment to the film surface, there is also an effect that the surface reflection of sunlight is not dazzling.

As a material, a fluororesin film such as polyethylene tetrafluoroethylene (ETFE), polytrifluoroethylene, or polyvinyl fluoride can be used as an organic resin, but is not limited thereto. A surface treatment such as a corona discharge treatment can be applied to the surface to be bonded with the filler so that the filler is easily bonded. When glass is used as the material, for example, white plate tempered glass can be used.

[Filler] In the present invention, the filler is used for the purpose of sealing the photovoltaic element and bonding and fixing the photovoltaic element on the surface coating material or the back surface coating material.

The properties required for the filler include thermoplasticity, weather resistance, thermal adhesion, and light transmission. Materials include EVA (vinyl acetate-ethylene copolymer), butyral resin, silicone resin, fluororesin, EEA (ethylene ethyl acrylate), EMA (ethylene methyl acrylate), EBA (ethylene butyl acrylate), acrylic resin, urethane resin A transparent resin such as PVA (polyvinyl alcohol) can be used, but is not limited thereto. Further, in order to suppress light deterioration, it is desirable that an ultraviolet absorber is contained.

[Back Coating Material] It functions as a coating material on the back surface of the solar cell module or as a back reinforcing material. The material is not particularly limited, but a laminated material such as Tedlar / aluminum / Tedlar may be used in addition to a resin material such as PET or Tedlar. More preferable materials include materials capable of imparting moisture resistance and rigidity, such as aluminum sheets and stainless steel sheets, as well as galvanized steel sheets and metal materials used for roofing materials such as galvanized steel sheets and the like. Can be used. Also, non-combustible materials such as tiles and slate materials can be used.

[Non-combustible material] When the solar cell modules are integrally laminated, they are laminated so as to cover the entire surface of the terminal extracting hole.

The material may be anything as long as it is nonflammable, but generally a metal material such as stainless steel or copper is used.

The sheet is preferred because it is integrally laminated. However, it is more convenient if the thickness is small so as to follow irregularities because it is laminated on a conductive member.

When the solar cell module is bent, it is more preferable to arrange the non-combustible material so as to be bent at the same time. The reason is that the non-combustible material is mechanically fixed on the roof structure by folding, so that even if the filler burns, it does not roll up or peel off.

[Conductive Member] In order to extract electricity from the photovoltaic element, it is used in a portion extending from the photovoltaic element to a terminal extraction portion.

Generally, the maximum temperature of the flame during the spread of fire is about 9
Since it is 50 ° C., the melting point of the material used for the conductive member is 950
It is preferable that the temperature is not lower than ° C. As a material, a metal such as copper can be used.

The shape is preferably a sheet because it is necessary to fill the filler constituting the solar cell module at the time of integral molding. Furthermore, when the flame spreads, the conductive member may be deformed or displaced by heat, so if the conductive member covers the terminal extraction hole, the conductive member should be sufficient for the size of the hole. Larger is preferable. In general, a copper foil can be used as the conductive member.

When the solar cell module is bent, it is more preferable to arrange the conductive member so as to be bent at the same time. The reason is that the conductive member is mechanically fixed on the roof structure by bending, so that even if the filler burns, it does not roll up or peel off.

[0056]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail based on embodiments.

Example 1 First, a thin film semiconductor (as
The photovoltaic element constituted by i) was manufactured. This manufacturing procedure will be described with reference to FIG.

In FIG. 3, reference numeral 301 denotes a stainless steel substrate as a conductive substrate, 302 denotes a metal electrode layer, 303 denotes a semiconductor photoactive layer, 304 denotes a transparent conductive layer, and 305 denotes a current collecting electrode. On the cleaned stainless steel substrate 301, an Al layer (film thickness: 5000 °) as a back metal electrode layer 302 by a sputtering method.
And a ZnO layer (thickness 5000 °) are sequentially formed. Next, an n-type a-Si layer was formed from a mixed gas of SiH ₄ , PH ₃ and H _2, an i-type a-Si layer was formed from a mixed gas of SiH ₄ and H ₂ , and SiH ₄ and BF ₃ were formed by plasma CVD. A p-type microcrystalline μc-Si layer is formed from a mixed gas of H ₂ ,
A tandem a-Si based photoelectric conversion semiconductor layer 303 having a layer structure of 50 ° / i-layer thickness 4000 ° / p-layer thickness 100 ° / n-layer thickness 100 ° / i-layer thickness 800 ° / p-layer thickness 100 °.
Was formed. Next, as the transparent conductive layer 304, In ₂ O ₃
A thin film (thickness: 700 °) was formed by depositing In by a resistance heating method in an O ₂ atmosphere.

On this, a current collecting electrode 305 was formed by pattern-printing a silver paste with a screen printer and drying.

The photovoltaic elements produced as described above were connected in series, and a conductive member for terminal extraction was soldered to electrode extraction portions at both ends. Copper foil (thickness: 0.1 mm) was used as a conductive member for taking out terminals.

Next, a step of integrally forming the above-prepared photovoltaic element and then forming a terminal extraction portion is shown in FIG.
This will be described with reference to FIG. FIG. 2 is a schematic diagram for explaining a method for manufacturing a solar cell module of Example 1 of the present invention,
FIG. 2A is a schematic view for explaining the lamination of each material constituting the solar cell module, FIG. 2B is a schematic cross-sectional view of the solar cell module after integral molding, and FIG.
(C) is a schematic cross-sectional view of the solar cell module after forming a terminal extraction portion (the names of the respective reference numerals in the figure have already been described).

First, the materials constituting the solar cell module were laminated for integral molding (FIG. 2A).

The back cover 204, the filler 202, the photovoltaic element 201 to which the conductive member 205 prepared as described above was attached, the filler 202, and the front cover 203 were laminated in this order. The back surface coating material 204 is a painted steel plate (made by Nisshin Steel,
Product name: Galbuster, 0.4mm thickness), Filler 202
Is EVA (ethylene-vinyl acetate copolymer weatherproof grade, manufactured by Bridgestone Corporation, 460 μm), and the surface coating material 203 is a fluororesin film (ethylene tetrafluoroethylene, 50 μm thick, manufactured by Daikin, trade name: NEOFRON EF-0050SB1) It was used. The material laminated in this manner was heated to 160 ° C. in a vacuum state, and heat was applied to the filler 202 to crosslink it, thereby performing an integral molding process. At this time, the terminal covering hole 206 had been opened in the back surface covering material 204 before the integral molding process. The position and the hole diameter of the terminal extracting hole 206 are such that when viewed from the light receiving surface side when the layers are stacked, the conductive member 205 has the terminal extracting hole 206.
The whole surface was covered. In a later step, the conductive member 205 may be used.
In order to make the electrical connection of the lead-in electric wire 210 smoothly, a hole is formed in the filler 202 on the non-light receiving surface side of the photovoltaic element 201 in the terminal extracting hole 206,
The hole was filled with a silicon stopper (not shown).

Thereafter, cooling was performed to produce an integrally molded solar cell module as shown in FIG.

Next, a description will be given of a manufacturing process of the terminal extracting portion.

First, the silicon plug in the terminal taking-out hole 206 is removed, and the lead-in
Was soldered (209). Incoming wire 210 is IV
An electric wire (conductor area 0.5 sq) was used. Next, the terminal box 207 integrated with the power take-out cable 208 was bonded and fixed to the terminal take-out hole 206. Terminal box 20
7 is made of polycarbonate, and the power take-out cable 208 is a CV cable (conductor area 2 s).
q), RTV silicone sealant (trade name: Silastic 739 Black,
Dow Corning Asia) was used. Also, terminal box 2
No. 07 has an opening (not shown) on the solar cell module side, and was drawn into the opening and adhered through the electric wire 210. Then, the lead-in wire 210 and the power take-out cable 208 were electrically connected in the terminal box 207, and a cover (not shown) of the terminal box 207 was attached to produce a terminal take-out portion.

Next, a process of bending the solar cell module manufactured as described above and installing the module on a roof will be described. FIG. 4 is a schematic diagram for explaining the solar cell module of the first embodiment. FIG. 4A is a schematic diagram of the solar cell module after bending, and FIG. 4B is a solar cell after bending. It is an outline sectional view for explaining a place where a module is fixed on a roof. In the figure,
Reference numeral 401 denotes a photovoltaic element, 402 denotes a terminal box, 403 denotes a power takeout cable, 404 denotes a fixing member, 405 denotes a cover member, 406 denotes a crosspiece, and 407 denotes a field plate.

First, the solar cell module produced as described above was bent to produce a solar cell module as shown in FIG. The bending process used a roller former.

Next, the pier 40 is placed on the roof base plate 407.
6 was fixed. The pitch of the crosspiece 406 was the total length of the width of the solar cell module and the width of the fixing member 404. Then, the solar cell modules were arranged in advance so as to straddle between the crosspieces 406, and the solar cell modules were fixed on the crosspieces 406 by fixing members 404. The fixing member 404 was fixed on the crosspiece 406 with a drill screw. And the fixing member 4
A cover member 405 was placed over the solar cell module 04 so as to cover the hanging part of the solar cell module and the fixing member 404, and was fixed on the crosspiece 406 with nails. The power supply cable 403 of the solar cell module was connected to adjacent solar cell modules on the eaves side and the ridge side. By repeating the above operation, a roof with solar cells as shown in FIG. 10 was completed.

As described above, in the case where the terminal extracting portion is provided in a portion having no photovoltaic element, the conductive member covers the entire surface of the terminal extracting hole. Back side of solar cell module (space between solar cell module and base plate)
, And further spread of fire can be suppressed.

(Embodiment 2) This is an example in which the terminal take-out portion of the solar cell module in Embodiment 1 is provided beside the vertically bent portion.

FIG. 5 is a schematic diagram for explaining the solar cell module according to the second embodiment. FIG. 5 (a) is a schematic diagram of the solar cell module after bending, and FIG. 5 (b) is after the bending. FIG. 5C is a schematic cross-sectional view of a terminal extraction part of a bent part, illustrating a place where the solar cell module is fixed on a roof. In the figure, 501 is a photovoltaic element, 502 is a terminal box, 503
Is a power take-out cable, 504 is a fixing member, 505
Is a cover member, 506 is a field plate, and 507 is a conductive member.

In the second embodiment, the number of photovoltaic elements manufactured in the first embodiment is reduced to reduce the length of the solar cell module, and the mounting position of the conductive member 507 is changed to A module was prepared in which a terminal extraction portion was provided beside the vertically bent portion of the module. At this time, the conductive member 507 was arranged so as to cover the vertically bent portion (FIG. 5C). The conductive member 5
07 is mechanically fixed when the solar cell module is fixed as a roof material, so that even if the filler burns, it is unlikely to be rolled up. Then, the conductive member 507 was integrally molded by sandwiching the conductive member 507 by arranging a polyester tape (without an adhesive material) wider than the conductive member 507 in the bent portion at the top and bottom. By bending the sandwiched portion, the conductive member 507 in the sandwich portion slides in the tape, so that the conductive member 507 does not break even when bent.

At the time of the integral molding process, the number of photovoltaic elements 501 in series is reduced to change the size of the back cover material, the filler, and the front cover material, and to change the mounting position of the conductive member 507. The position of the hole for taking out the terminal of the back cover material was also changed. As in Example 1, the position and diameter of the terminal extracting hole were such that the conductive member 507 covered the entire terminal extracting hole when viewed from the light receiving surface side.
Except for the above, a solar cell module was manufactured in the same manner as in Example 1.

Next, the solar cell module was fixed on the roof surface. As shown in FIG. 5B, the solar cell module produced above was arranged on the roof surface (field board 506), and the solar cell module was fixed on the roof surface 506 by the fixing member 504. The fixing member 504 having a sufficiently shorter length than the roof material was used, and was fixed on the roof surface 506 by drill screws. Then, the cover member 505 was covered so as to cover the fixing member 504 and the vertically bent portion of the solar cell module, and was fixed with a nail (not shown). The electrical connection between the eaves and the ridge of the solar cell module was made in the space below the solar cell module. The horizontal electrical connection on the eaves side and the ridge side was made inside each eaves and inside the eaves storage member (not shown).

By repeating the above operation, a roof with solar cells as shown in FIG. 6 was completed. FIG. 6 is a schematic finished view of a roof with solar cells using the solar cell module of the second embodiment.

As described above, since the conductive member covers the entire surface of the terminal taking-out hole and is bent by being applied to the bent portion, even if a flame caused by a spark spreads over the solar cell module. Since the conductive member is unlikely to float or roll up, the back side of the solar cell module (the field plate side under the solar cell module)
Will be difficult to reach.

(Embodiment 3) In Embodiment 1, the solar cell module is of a horizontal roofing type, and a type in which a terminal extraction portion is provided in a vertically bent portion is used.

FIG. 7 is a schematic view for explaining the solar cell module according to the third embodiment. FIG. 7 (a) is a schematic view of the solar cell module after bending, and FIG. 7 (b) is after the bending. FIG. 3 is a schematic cross-sectional view for explaining a state where the solar cell module of FIG. 1 is fixed on a roof. In the figure,
701 is a photovoltaic element, 702 is a terminal box, 703 is a power take-out cable, and 704 is a field board.

The number of photovoltaic elements manufactured in Example 1 was reduced in series to shorten the length of the solar cell module, and the mounting position of the conductive member was changed to form A terminal extraction portion was provided, and the bent shape of the solar cell module was changed to a horizontal roofing type. To reduce the number of photovoltaic elements in series and to change the size of the back coating, filler, and back coating in order to bend into a horizontal roofing type, and to change the mounting position of the conductive member, the back coating Also changed the position of the hole for taking out the terminal. As in Example 1, the position and the diameter of the terminal extracting hole were such that the conductive member covered the entire surface of the terminal extracting hole when viewed from the light receiving surface side. After the solar cell module was bent, the terminal box was attached.

Except for the above, a solar cell module was manufactured in the same manner as in Example 1.

Next, the solar cell module was fixed on the roof surface. As shown in FIG. 7B, the solar cell module produced above was arranged on the roof surface (field board 704), and the solar cell module was fixed on the roof surface by a hook (not shown). The suspension was fixed on the roof surface 704 with a drill screw.

FIG. 8 is a schematic diagram of a solar cell integrated roof using the solar cell module of Example 3 as a roofing type roofing material. In the figure, 801 is a photovoltaic element, 802 is a solar cell module, and 803 is a general roofing material.

The electric connection between the solar cell module in the eaves-ridge direction was made under the general roofing material 803 on the keraba side, and the electric connection in the horizontal direction was made in the space between the solar cell module and the base plate.

The above operation was repeated, and the general roofing material of both the keraba parts was also fixed on the roof surface by means of hangers (not shown).
A roof with solar cells as shown in FIG. 8 was completed.

As described above, when the terminal extracting portion is provided in a portion having no photovoltaic element, the conductive member covers the entire surface of the terminal extracting hole. It is difficult to reach the back surface side of the solar cell module (the side of the base plate under the solar cell module), and further fire spread can be suppressed. Also, by bending the solar cell module between the photovoltaic element and the terminal take-out part, by covering the bent part when the adjacent solar cell modules are assembled,
Spread of fire on the back side of the solar cell module can be further suppressed.

(Example 4) A solar power generation system is constructed by connecting the solar cell module manufactured in Example 1 to a system power circuit.

FIG. 9 is a schematic diagram for explaining a solar power generation system according to Embodiment 4 of the present invention. 901 in the figure
Represents a photovoltaic element, a 902 solar cell module, and 903
Is a connection box, 904 is an inverter, 905 is a switchboard, 9
06 is an electric appliance in the home, 907 is an integrating wattmeter, 908
Is a system power circuit.

To briefly explain the drawing, the electric power generated by the solar cell module is collected in a junction box 903,
The cross-current is converted by the inverter 904 and the switchboard 90
5 to the home electrical equipment 906. Here, if there is a large amount of surplus power, the system power circuit 908
And send it to a power company to buy power.
Conversely, the amount of power generation is small, or home electrical equipment 906
If the power consumption is large, the shortage is
Can be purchased from a power company.

As described above, a system cooperation system can be constructed by connecting to the system power circuit.

[0091]

According to the present invention, there is provided a solar cell module having at least a photovoltaic element and a back cover material, wherein the terminal of the back cover material is provided at a portion where the photovoltaic element is not provided. A terminal for taking out a terminal from the hole for taking out through a conductive member electrically connected to the photovoltaic element, having a non-combustible material on the light receiving surface side of the hole for taking out the terminal, Is a solar cell module characterized by covering the entire surface of the terminal extraction hole, and a solar cell module having at least a photovoltaic element and a back surface coating material, wherein the portion without the photovoltaic element It has a structure in which a terminal is taken out from a terminal taking-out hole of the provided back surface covering material through a conductive member electrically connected to the photovoltaic element, and the conductive member is provided at the end. The following effects according to the solar cell module, characterized in that it in the light-receiving surface side covering the entire surface of the hole for the extraction the terminal hole for extraction is obtained.

Since the non-combustible material or the conductive member covers the front surface of the hole for taking out the terminal of the back surface covering material, even if the flame caused by the spark spreads on the solar cell module, the flame is still under the solar cell module (the solar cell module). It is difficult to reach the space between the module and the base plate, and the spread of fire can be suppressed.

[0093] By bending the conductive member at the time of processing the solar cell module so that the conductive member passes over the bent portion, even if a flame due to a spark spreads over the solar cell module, the conductive member floats or turns over. Since it is difficult to ascend, it is difficult to reach the back side of the solar cell module (the side of the base plate under the solar cell module).

The back cover material is bent between the terminal extracting hole and the photovoltaic element, the terminal extracting portion is provided in the vertically bent portion of the solar cell module, and the cover member is disposed on the vertically bent portion. By spreading or placing it in a portion where it is assembled with an adjacent solar cell module, it is possible to further suppress the spread of fire to the lower side of the solar cell module.

[Brief description of the drawings]

FIG. 1 is a schematic view for explaining a structure of a terminal extracting portion of a solar cell module in which a terminal extracting position of the present invention is provided in a portion having no photovoltaic element, and FIG. FIG. 1B is a schematic cross-sectional view of a terminal extracting section, and FIG. 1C is a top view of the terminal extracting section, showing a partial schematic view of a solar cell module provided in a portion having no photovoltaic element.

FIG. 2 is a schematic diagram for explaining a method for manufacturing a solar cell module according to the present invention, and FIG. 2A is a schematic diagram for explaining a process of stacking respective materials constituting the solar cell module. 2 (b) is a schematic cross-sectional view of the solar cell module after integral molding, and FIG. 2 (c) is a schematic cross-sectional view of the solar cell module after forming a terminal extraction portion.

FIG. 3 is a schematic cross-sectional view for explaining a photovoltaic element constituting the solar cell module of the present invention.

4A and 4B are schematic diagrams for explaining the solar cell module of Example 1, in which FIG. 4A is a schematic diagram of the solar cell module after bending, and FIG. 4B is a solar cell after bending. It is an outline sectional view for explaining a place where a module is fixed on a roof.

5A and 5B are schematic diagrams for explaining the solar cell module of Example 2, FIG. 5A is a schematic diagram of the solar cell module after bending, and FIG. 5B is a solar cell after bending. FIG. 5C is a schematic cross-sectional view of a terminal extraction portion of a bent portion, for explaining a place where the module is fixed on a roof.

FIG. 6 is a schematic finished view of a roof with solar cells using the solar cell module of Example 2.

FIGS. 7A and 7B are schematic diagrams illustrating a solar cell module according to a third embodiment. FIG. 7A is a schematic diagram of a solar cell module after bending, and FIG. 7B is a solar cell after bending. It is a schematic sectional drawing for demonstrating the place which fixed the module on the roof.

FIG. 8 is a schematic finished view of a roof with solar cells using the solar cell module of Example 3.

FIG. 9 is a schematic diagram illustrating a photovoltaic power generation system according to a fourth embodiment.

10 is a schematic finished view of a roof with solar cells using the solar cell module of Example 1. FIG.

FIG. 11 illustrates an example of a solar cell module in which a terminal extraction position is provided at a position where no photovoltaic element is provided.

12A and 12B show a second example of a solar cell module in which a terminal extraction position is provided at a position where no photovoltaic element is provided. FIG. FIG. 12B shows another example of the solar cell module provided therein, in which the terminal box is provided in a place where no photovoltaic element is provided and the solar cell module is provided on the roof surface. It is an outline sectional view.

FIG. 13 is a schematic diagram for explaining the structure of a terminal extracting portion of a solar cell module provided at a portion where a terminal extracting position is not provided with a photovoltaic element, and FIG. FIG. 13B is a schematic cross-sectional view of a terminal extracting portion, and FIG. 13C is a top view of the terminal extracting portion, which is a schematic diagram of a solar cell module provided in a portion without a power element.

FIG. 14 is a schematic view for explaining the structure of a terminal extracting portion of a solar cell module in which the terminal extracting position of the present invention is provided in a portion without a photovoltaic element, and FIG. 14 (a) shows the terminal extracting position. FIG. 14 (b) is a schematic cross-sectional view of a terminal extracting portion, showing a partial schematic view of a solar cell module provided in a portion without a photovoltaic element.

[Explanation of symbols]

101, 201, 401, 501, 601, 701, 8
01, 901, 1001, 1101, 1201, 130
1, 1401 photovoltaic elements 102, 207, 402, 502, 702, 1102,
1202, 1302, 1402 Terminal box 103, 208, 403, 503, 703, 1103,
1203, 1303, 1403 Power take-out cable 104, 205, 507, 1304, 1404 Conductive member 106, 206, 1306, 1409 Terminal take-out hole 209 Soldering part 210 Lead-in wire 404, 504, 1206 Fixing member 405, 505 Cover member 406 Girder 407, 506, 704 Field board 803 General roofing material 602, 802, 902, 1002 Solar cell module 903 Junction box 904 Inverter 905 Switchboard 906 Home electrical equipment 907 Integrated power meter 908 System power circuit 108, 202, 1308, 1406 Filler 107, 203, 1307, 1407 Surface coating 105, 204, 1305, 1405 Back coating 301 Conductive substrate 302 Metal electrode layer 303 Semiconductor photoactive layer 304 Transparent conductive Layer 305 collector electrode 1204 roofing between the cover 1205 roof 1408 nonflammable

Continuation of the front page (72) Inventor Ayako Komori 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. (72) Inventor Tetsu Shiomi 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. (72) Inventor Hidehisa Makita 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. (72) Inventor Makoto Sasaoka 3-30-2, Shimomaruko 3-chome, Ota-ku, Tokyo Canon Inc. (72) Invention Person Yoshitaka Nagao 3-30-2 Shimomaruko, Ota-ku, Tokyo Inside Canon Inc. (72) Inventor Toshihiko Mimura 3-30-2 Shimomaruko, Ota-ku, Tokyo Inside Canon Inc. (72) Inventor Yuji Inoue Tokyo 3-30-2 Shimomaruko, Ota-ku, Tokyo F-term (reference) in Canon Inc. 2E108 KK04 LL03 MM00 NN07 5F051 BA03 BA11 EA17 EA18 JA06

Claims (11)

[Claims] 1. A solar cell module having at least a photovoltaic element and a back surface covering material, wherein the photovoltaic element is formed through a terminal extraction hole of the back surface covering material provided in a portion where the photovoltaic element is not provided. It has a structure to take out a terminal through a conductive member electrically connected to a power element, has a non-combustible material on the light receiving surface side of the terminal taking-out hole, and the non-combustible material is provided on the entire surface of the terminal taking-out hole A solar cell module characterized by covering a solar cell. 2. A solar cell module having at least a photovoltaic element and a back cover material, wherein the photovoltaic element is inserted through a terminal extraction hole of the back cover material provided in a portion where the photovoltaic element is not provided. It has a structure to take out a terminal through a conductive member electrically connected to a power element, and the conductive member covers the entire surface of the terminal taking-out hole on the light receiving surface side of the terminal taking-out hole. Characteristic solar cell module. 3. The solar cell module according to claim 1, wherein the back surface covering material is a non-combustible material. 4. The solar cell module according to claim 3, wherein said back surface covering material is a metal steel plate. 5. The solar cell module according to claim 1, wherein said conductive member is a copper foil. 6. The back cover material is bent, and the non-combustible material or the conductive member is bent together with the back cover material at the bent portion. Solar module. 7. The solar cell module according to claim 6, wherein the terminal takeout hole is provided in a vertically bent portion. 8. The solar cell module according to claim 1, further comprising a surface coating material on the light receiving surface side, wherein the surface coating material is a weather-resistant transparent resin. 9. A roof with solar cells, wherein the solar cell module according to claim 1 is arranged on a roof surface. 10. A solar power generation system comprising the solar cell module according to claim 1. Description: 11. A photovoltaic power generation system comprising a roof with a solar cell according to claim 9.