JP2002222979A - Solar battery module and method for installing to its tent structure building - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for installing a solar battery module so that a canvas material as well as a terminal box is not moved; and the solar battery module suited therefor. SOLUTION: In a solar battery module main body, one or a plurality of solar battery modules 11 and an internal wire 13 for fetching an output of a solar battery cell are clad with protection films 15, 16 from both faces, and further in a solar battery module, a terminal box 17 which is integrated with a connecting terminal between an external cable and the internal wire is attached to the solar battery module main body, the terminal box is attached to the solar battery module main body by a larger mounting plate 18a than the bottom surface, and the mounting plate is fixed to a structure of a canvas structure building.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for installing a flexible solar cell module covered with a plastic film on a tent structure building, and to a solar cell module suitable for installation.

[0002]

2. Description of the Related Art A solar cell module in which a solar cell comprising a flexible substrate and a photoelectric conversion element formed thereon is covered with a weather-resistant plastic film is a flexible tent structure building because of its flexibility. Suitable for installation on objects.

FIGS. 7A and 7B show a conventional flexible solar cell module having a terminal box, FIG. 7A is a perspective plan view, and FIG. 7B is a combined sectional view of AA and BB in FIG. On both sides of one or a plurality of solar cells 11, internal wirings 13 made of a strip-shaped flat foil metal plate or the like for taking out power of the solar cells from the solar cell module are arranged in parallel, and the anode of each solar cell 11 and Each of the cathodes is electrically connected to the internal wiring 13 by an auxiliary wiring 12 made of a conductive adhesive tape or the like for extracting electric power.
The solar cell 11, the auxiliary wiring 12, and the internal wiring 13 are made of, for example, an ethylene-vinyl acetate copolymer (hereinafter abbreviated as EVA) or tetrafluoroethylene-hexafluoropropylene-vinylidene fluoride copolymer as a sealing film. Merging (hereinafter abbreviated as THV)
A surface protection film 15 made of a weather-resistant material such as a fluororesin such as an ethylene / tetrafluoroethylene copolymer (hereinafter abbreviated as ETFE) as a weather-resistant film through a heat-welding plastic material 14 such as On the back side, a hexafluoropropylene / tetrafluoroethylene copolymer (hereinafter abbreviated as FEP) is used to integrate the tent film material and the solar cell module firmly and easily.
The solar cell module body is sandwiched and covered with a back surface protection film 16 made of such as.

The terminal end of the internal wiring 13 is connected to an external connection terminal which is introduced into the terminal box 17 and used for connection to an external wiring. The terminal box 17 is arranged on the light receiving surface side of the non-power generation region of the solar cell module body where no solar cells are provided, and has substantially the same dimensions as the bottom surface of the terminal box on the back side of the solar cell module body across the solar cell module body. And is fixed to each other with screws (not shown) made of plastic or the like.

In the solar cell module, a hatched peripheral portion m around the solar cell module body is heated, and the back protective film 16 and the surface coating material of the tent film material are heat-welded to form a tent structure building. Installed in

[0006]

In a tent structure building, when a strong wind hits the used tent membrane, the tent membrane is wavy or the like. At this time, the solar cell module also undulates with the tent film material, but the location of the terminal box is heavier due to the terminal box, which increases the inertial force, and is located near the terminal box where the back protective film and the tent film material are welded. In this case, the mechanical force such as the tensile force becomes larger than in other places, and breakage occurs earlier than in other places. Also, the cable (external wiring) coming out of the terminal box is held by the tent membrane material and the building structure and drawn into the inverter, but the cable held by the building structure hardly moves. When the terminal box moves together with the material, a tensile force acts on the cable, which may cause damage to the cable.

The present invention provides a method for installing a solar cell module capable of suppressing the occurrence of the above-mentioned problems, and a solar cell module suitable for the method.

[0008]

In order to achieve the above-mentioned object, a solar cell comprising one or a plurality of solar cells and internal wiring for extracting the output of the solar cells, both of which are covered on both sides by protective films. A battery module body,
Further, in a solar cell module in which a terminal box containing a terminal for connection between an internal wiring and an external cable is mounted on the solar cell module main body, the terminal box is mounted on the solar cell module main body by a mounting plate larger than the bottom surface of the terminal box. It shall be attached to.

The internal wiring is preferably a braided conductor. The solar cell module body preferably has an elongated extension cable in which an extension of the internal wiring is covered on both sides by an extension of the protective film, and the terminal box is preferably attached to an end of the extension cable. The extended portion of the internal wiring is wrapped around the outer peripheral portion of the solar cell of the solar cell module, and the elongated elongated cable may be obtained by cutting along the extended portion.

In the method for installing a solar cell module according to any one of the above, the terminal box is fixed to an outer edge portion of the terminal box of the mounting plate to a structure of a tent structure building, so that the terminal box is connected to the tent structure building. It should be fixed to the structure of the object.

[0011]

FIG. 1 shows a flexible solar cell module having a mounting plate according to the present invention (a).
FIGS. 3A and 3B are perspective plan views, and FIGS.
It is B synthetic | combination sectional drawing. The sealing structure of the solar cell module is the same as the structure described in the related art. In the present invention, the terminal box 17 is larger than the bottom surface of the terminal box 17 and is attached to the solar cell module main body using a terminal box attaching plate 18a having a plurality of attachment holes 18h for fixing to a building. The terminal box 17 is attached to the solar cell module body 10 by screws (not shown) as in the conventional case.

After the solar cell module main body 10 has its peripheral edge m (hatched portion) integrated with a tent film material by heat welding, the tent film material with the solar cell module is applied to a building structure. Then, fix the terminal box to the building structure. FIG. 2 is a fragmentary perspective view showing a method of attaching a terminal box to a building structure according to the present invention. The side of the tent film material 23 is folded back with the bar-shaped reinforcing member 24 inside, and the overlapped portion is sandwiched between rubber sheets 31 and pressed by a pressing plate 32. 22 is fixed with bolts 33. Thereafter, the terminal box 17 is fixed to the holding plate 3 by screws 18n penetrating through mounting holes provided in the terminal box mounting plate 18a.

As described above, since the mounting plate is larger than the terminal box, the fixing operation can be performed easily and reliably without blind operation. The terminal box is fixed to a part of a rigid building structure that is not flexible, for example, to an eaves portion. No local fatigue occurs as in the prior art.

FIG. 3 is a perspective plan view showing a solar cell module suitable for installation according to the present invention. The terminal box 17 is separated from the conventional solar cell module body 10, and the internal wiring 13 is extended and introduced into the terminal box 17. The extension of the internal wiring 13 is continuously coated with the same coating as in the solar cell module main body 10 to form an extension cable 13a. Since the extension part separately manufactured is not connected to the solar cell module main body 10, the covering part does not have a discontinuity in terms of material, and does not invade rainwater or the like, so that the reliability is high. With such an extension cable 13a, the installation location of the terminal box 17 can be freely selected, and the installation is facilitated.

FIG. 4 is a plan view showing an example of a terminal box fixing method using an extension cable according to the present invention. It can be seen that folding the extension cable 13a (folding portion 13r) further increases the degree of freedom in selecting the installation location.
FIG. 5 is a partial view of a flexible internal wiring according to the present invention. As the internal wiring, for example, a braided conductor 13c in which a plurality of strands are woven, such as an external shield used for a coaxial cable or the like, is used. Even if the braided conductor 13c is used, the manufacturing method of the solar cell module does not change, and the flexibility of the solar cell module or the internal wiring extension is increased, so that the coating is not broken by folding, and the simplicity of the construction is increased. did.

FIG. 6 is a plan view of another solar cell module having internal wiring according to the present invention. Internal wiring extension 1
Reference numeral 3b extends around the peripheral portion further outside the internal wiring of the solar cell module body. This portion is continuously covered with the same film as the solar cell module main body.
Then, by cutting along a cutting line L (two-dot chain line) drawn along the internal wiring extension 13b, an elongated cable similar to that shown in FIG. 5 can be obtained. The terminal box 17 is attached to the end of the extension cable.

The two internal wiring extension portions 13b may be wrapped around the other side of the solar cell module main body, or may be arranged asymmetrically. This extension cable is appropriately folded (FIG. 4)
), The terminal box can be easily installed at any position.

[0018]

According to the present invention, a solar cell module main body in which one or a plurality of solar cells and internal wiring for taking out the output of the solar cells are both covered with a protective film, In a solar cell module in which a terminal box containing a terminal for connecting a wiring and an external cable is mounted on the solar cell module main body, the terminal box is mounted on the solar cell module main body by a mounting plate larger than the bottom surface of the terminal box. In addition, since the braided conductor has elasticity, even if the solar cell module undulates and a tensile force or the like is generated between the module and the terminal box, the braided conductor itself expands and contracts according to the tensile force, so that the disconnection occurs. And metal fatigue due to repetitive force can be avoided, and failure of the solar cell module can be reduced. .

Further, by fixing the outer edge of the terminal box of the mounting plate of the solar cell module to the structure of the tent structure building, the terminal box is fixed to the structure of the tent structure building. Therefore, even if the tent film on which the solar cell module is installed undulates due to the wind, there is no place where the weight concentrates in the solar cell module. Is no longer generated. Therefore, mechanical damage of a portion where the tent film material and the solar cell module are bonded can be suppressed.

[Brief description of the drawings]

1A and 1B show a flexible solar cell module having a mounting plate according to the present invention, wherein FIG. 1A is a perspective plan view, and FIG. 1B is a combined sectional view of AA and BB in FIG.

FIG. 2 is a fragmentary perspective view showing a method of attaching a terminal box to a building structure according to the present invention.

FIG. 3 is a plan view showing a solar cell module suitable for installation according to the present invention.

FIG. 4 is a plan view showing an example of a terminal box fixing method using an extension cable according to the present invention.

FIG. 5 is a partial view of a flexible internal wiring according to the present invention.

FIG. 6 is a plan view of another solar cell module having internal wiring according to the present invention.

7A and 7B show a conventional flexible solar cell module having a terminal box, FIG. 7A is a perspective plan view, and FIG. 7B is a cross-sectional view of AA and BB in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Solar cell module main body 11 Solar cell 12 Auxiliary wiring 13 Internal wiring 13a Internal wiring extension part 13b Extension cable 13c Braided conductor 13r Folding part 14 Sealing film 15 Surface protection film 16 Back surface protection film 17 Terminal box 18 Terminal box mounting plate 18h Mounting hole 18n Mounting screw 21 Building structure 22 Eave-shaped base portion 23 Tent film material 24 Reinforcement member 31 Rubber sheet 32 Pressing plate 33 Bolt m Heat welded part L Cutting line

Claims (5)

[Claims] 1. A solar cell module body comprising one or a plurality of solar cells and internal wiring for taking out the output of the solar cells, both of which are covered with protective films from both sides, and further comprising an internal wiring and an external cable. In a solar cell module in which a terminal box containing connection terminals is attached to the solar cell module main body, the terminal box is attached to the solar cell module main body by a mounting plate larger than the bottom surface of the terminal box. And solar cell module. 2. The solar cell module according to claim 1, wherein said internal wiring is a braided conductor. 3. The solar cell module main body has an elongated extension cable in which an extension of an internal wiring is covered on both sides by an extension of the protective film, and the terminal box is attached to an end of the extension cable. The solar cell module according to claim 1, wherein: 4. An extended portion of the internal wiring is wrapped around an outer peripheral portion of a solar cell of the solar cell module,
The solar cell module according to claim 3, wherein the elongated extension cable is obtained by cutting along the extension. 5. The terminal box is fixed to the structure of the tent structure building by fixing the outer edge of the terminal box of the mounting plate to the structure of the tent structure building. Item 5. A method for installing a solar cell module according to any one of Items 1 to 4.