JP4325311B2 - Solar cell module - Google Patents

Description

  The present invention relates to a solar cell module, and in particular, has a solar cell sealed with at least a sealing material between a light-receiving surface side protective material and a non-light-receiving surface side protective material, and a wiring material on the back surface of the non-light-receiving surface side protective material It is related with the solar cell module which arranges.

  From the viewpoint of global environmental protection, the introduction of environmentally friendly energy sources is progressing. Above all, solar cells are attracting attention as very clean energy because they are a power generation method that directly obtains electric energy from the light energy of the sun. Recently, the amount of introduction has increased significantly due to the progress of technological development and the national introduction promotion policy.

  Various types of solar cell modules have been proposed for use in solar power generation systems. The power generation element is sealed with a resin such as EVA (ethylene-vinyl acetate copolymer), and a glass plate is formed on the light receiving surface side. And a weather-resistant film in which a waterproof sheet, a steel plate, a tile material, etc. are arranged on the non-light-receiving surface side are known.

  In particular, a so-called steel plate-laden solar cell module in which a steel plate is disposed on a non-light-receiving surface of a solar cell as a non-light-receiving surface side protective material (reinforcing material) is simply bending a peripheral portion of the module where no power generating element is disposed. Therefore, since the building material integrated solar cell module can be configured and can be constructed in the same manner as a normal steel sheet roofing material, it is expected to be applied to a field different from the conventional stationary solar cell module for residential use.

  However, in the case of roofing with a building material integrated solar cell module having such a power generation function, a flammable sealing resin, a terminal box, a wiring coating material, or the like is usually used for the solar cell module. Therefore, it must conform to the technical standards stipulated in the Building Standards Act on materials used for roofs and construction methods.

  Therefore, solar cell modules with various devices have been proposed from the viewpoint of fire prevention. In particular, when a solar cell module is ignited by a spark or the like, there are the following technologies that prevent the fire of the wiring of the solar cell module and prevent the fire from burning from the wiring to the roof (for example, patents) Reference 1).

In addition, although not intended to prevent the solar cell module from being transferred to the roof, the technology for improving the fire resistance of the solar cell module itself is as follows (see, for example, Patent Document 2). .
JP 2002-026355 A (paragraph numbers [0013] to [0015], FIG. 1) JP 2002-111032 (paragraph numbers [0029] to [0031], FIG. 1)

  However, the technique described in the above-mentioned Patent Document 1 forms a void by bending a metal plate that is a back surface reinforcing material of the solar cell module, and embeds the wiring in the void, thereby burning the wiring over the metal. However, there is a problem that the structure becomes complicated.

  Moreover, the technique described in the said patent document 2 prevents a terminal box falling off from a solar cell module at the time of a fire by installing a terminal box between an intermediate | middle protection member and a back surface protection member, and a solar cell module Although it does not ignite itself, it is provided in the intermediate protective member when the glass that is the surface protection material of the solar cell module is damaged by a fire and the internal combustible resin starts to burn out due to a fire in the adjacent house. In some cases, the sealing material burning from the through-hole for taking out the wiring falls to the lower part and the terminal box in the lower part burns. Since the external wiring material is taken out to the base plate of the roof, which is the back side of the solar cell module, through a hole that is waterproofed with heat-resistant rubber packing etc. provided on the back surface protection member, the fire of the terminal box is externally wired There was a problem that there was a risk of burning to the base plate by burning it to the wood and spreading it.

  This invention is made | formed in view of such a point, and it aims at providing the solar cell module which can prevent a fire spread effectively with a simple structure.

In the present invention, in order to solve the above problems, has a solar cell sealed with at least a sealing material between the light-receiving surface side protection member and a non-light receiving surface side protection member, the back surface of the non-light-receiving surface side protection member In the solar cell module in which the wiring member is arranged, the solar cell module has one or a plurality of fireproofing prevention members of the refractory material provided on the wiring member, and a fireproof wiring storage portion for storing the wiring material. A featured solar cell module is provided.

  With the above configuration, even if the solar cell module ignites and the wiring spreads, the spread of fire can be prevented by the fire spread prevention member.

  In the present invention, the terminal box is combusted by flying fire or the like by providing one or a plurality of fireproofing prevention members of fireproof material on the wiring material connected to the terminal box used in the solar cell module. When the fire is spread to the wiring material connected to the wiring material, the fire spread of the wiring material can be stopped by the fire spread prevention member provided on the wiring material, so that it is possible to prevent the expansion of the fire without a complicated structure.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a partial perspective view of a solar cell module.
The solar cell module 10 is generally arranged on the side opposite to the solar light incident side, the solar cell 1 that is a power generation element, the light-receiving surface side protective material 2 disposed on the solar light incident side of the solar cell 1. The non-light-receiving surface side protective material 3 is provided. A terminal box 4 is provided on the back surface of the non-light-receiving surface side protective material 3, and a wiring material 5 for extracting the electromotive force of the solar cell 1 to the outside is drawn from the terminal box 4. Moreover, the fire spread prevention members 11a to 11c are attached to the wiring member 5 (details will be described later).

  A roofing material 101 is provided on the base plate 100 on which the solar cell module 10 is laid. On top of that, a wiring gutter 50 manufactured by bending a steel plate is fixed with a wiring gutter fixing screw 52 at a position corresponding to the wiring portion of the solar cell module 10. When the solar cell module 10 is laid, the solar cell module 10 is placed on the wiring gutter 50 via the heat insulating material 51. In that case, the wiring material 5 of the solar cell module 10 is accommodated in the space generated by bending the steel sheet of the wiring gutter 50. In addition, the space which stores the wiring material 5 of the wiring gutter 50 can also be generated by a method such as welding or screwing the steel plates together other than bending.

Next, the detailed structure of the solar cell module 10 will be described. FIG. 2 is a cross-sectional view of the solar cell module in the AA direction of FIG.
The solar cell module 10 is a Kapton film having a thickness of about 50 microns using a sealing resin 6 between the light-receiving surface side protective material 2 having translucency and the non-light-receiving surface side protective material 3 which is a metal plate. The solar cell 1 formed on (Toray DuPont, not shown) is sealed.

  The sealing resin 6 is EVA manufactured by Bridgestone (trade name EVASAFE (trademark)), and the light-receiving surface side protective material 2 is ETFE (ethylene / trifluoroethylene, trade name Aflex (registered trademark)) manufactured by Asahi Glass Co., Ltd. In addition, as the non-light-receiving surface side protective member 3, a galvalume steel plate (manufactured by Kawatetsu Steel Co., Ltd.) having a thickness of 0.35 mm is used.

  And the electric power extraction line 14 attached to the non-light-receiving surface side of the solar cell 1 and the lead wire 15 are connected by soldering, and the lead wire 15 passes through the hole 18 provided in the non-light-receiving surface side protective material 3. Then, it is pulled out into the terminal box 4. In the connection portion 17 inside the terminal box 4, the lead wire 15 and the core wire 5 a of the wiring member 5 are connected by the solder 16, and the electric power generated in the solar cell 1 is taken out by the wiring member 5. The inside of the terminal box 4 is filled with an insulating resin after wiring connection.

  The wiring member 5 is provided with the fire spread prevention members 11a to 11c as follows. An aluminum sleeve having an outer diameter slightly larger than the outer diameter of the wiring member 5 and having a thickness of 0.2 mm and a length of 200 mm is passed through the wiring member 5 in advance. Then, both ends of the sleeve are caulked with a strength that does not damage the core wire 5 a and the covering material of the wiring material 5, and are fixed to the wiring material 5. In this way, three aluminum sleeves were provided at intervals of 200 mm. These correspond to the fire spread prevention members 11a to 11c.

  Next, in order to confirm the fire spread prevention effect of the fire spread prevention members 11a to 11c provided on the wiring member 5 using the solar cell module 10 configured as described above, a flash test according to a method defined in the Building Standard Law. Carried out.

  For comparison, the following comparative specimens were prepared and the same flying test was performed. FIG. 4 is a partial perspective view of a solar cell module as a comparative sample (the same components as those in FIG. 1 are denoted by the same reference numerals and description thereof is omitted). In the figure, the solar cell module 30 in which the fire spread preventing members 11a to 11c are not provided on the wiring member 5 is a comparative sample.

  As a result of the test, in the comparative sample (solar cell module 30), the fire burned to the roofing material 101 and failed to pass the test, but the test body (solar cell module 10) could be extinguished in about 12 minutes. It was.

  As a result of the dismantling investigation after the test was completed, in the test body (solar cell module 10), the terminal box 4 and the covering of the wiring material 5 up to the first aluminum sleeve (corresponding to the fire spread prevention member 11a) as viewed from the terminal box 4 Although the material was burning, the fire spread was stopped at the aluminum sleeve portion. However, in the comparative sample (solar cell module 30), most of the covering material of the wiring material 5 was burned out and was only a wire.

  In addition, as the fire spread prevention members 11a to 11c, iron sleeves having the same length and thickness can be used instead of the aluminum sleeves. The melting point of the iron sleeve is 1537 ° C., and the fire resistance can be improved.

  Further, as the fire spread prevention members 11a to 11c, stainless steel sleeves having the same length and thickness can be used instead of the aluminum sleeves. The melting point of the stainless steel sleeve is about 1500 ° C., and the fire resistance can be improved.

  Furthermore, as the fire spread prevention members 11a to 11c, glass tubes having the same length fixed to the wiring member 5 with an adhesive can be used instead of the aluminum sleeve. The softening temperature of a glass tube is 500-1500 degreeC, and can improve a fireproof performance.

  Moreover, the fire spread prevention members 11a to 11c can use alumina tubes of the same length fixed to the wiring member 5 with an adhesive instead of the aluminum sleeve. The melting point of the alumina tube is 2060 ° C., and the fire resistance can be improved.

  Furthermore, as the fire spread prevention members 11a to 11c, tape-shaped members can be used instead of the aluminum sleeves. FIG. 3 is a cross-sectional view of a solar cell module using a tape-shaped fire spread prevention member. A cross-sectional view in the AA direction of FIG. 1 is shown in the same manner as FIG. 2, and the same components as those in FIG.

  In the solar cell module 20, as the fire spread preventing members 21a to 21c provided on the wiring member 5, an adhesive-attached aluminum tape having a thickness of about 100 microns is wound in the length direction of the wiring member 5 with a width of 200 mm, and at three intervals with an interval of 200 mm. It is arranged. Since these melting points are the same as those of the aluminum sleeve, the fireproof performance does not change, but since it can be installed simply by wrapping around the wiring member 5, workability can be improved.

  In addition, the fire spread prevention members 21a to 21c can use glass fiber tapes instead of aluminum tapes. The softening temperature of the glass fiber tape is 500 to 1500 ° C., and the workability can be improved simultaneously with the fire resistance.

  In addition, although the wiring of the solar cell module was demonstrated above, it can also be used for normal electrical wiring.

It is a partial perspective view of a solar cell module. It is sectional drawing of the solar cell module in the AA direction of FIG. It is sectional drawing of the solar cell module which uses a tape-shaped fire spread prevention member. It is a partial perspective view of the solar cell module of a comparative sample.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Solar cell 2 Light-receiving surface side protective material 3 Non-light-receiving surface side protective material 4 Terminal box 5 Wiring material 6 Sealing resin 10 Solar cell module 11a-11c Fire spread prevention member 50 Wiring gutter

Claims (9)

Has a solar cell sealed with at least a sealing material between the light-receiving surface side protection member and a non-light receiving surface side protection member, the solar cell module to place the wiring member on the back surface of the non-light-receiving surface side protection member,
One or a plurality of fire-resistant material fire prevention members provided on the wiring material;
A fireproof wiring storage section for storing the wiring material;
Solar cell module characterized by having a.   The solar cell module according to claim 1, wherein the wiring housing portion is made of metal.   The solar cell module according to claim 1, wherein the wiring housing portion is fixed to a field plate.   4. The solar cell module according to claim 2, wherein the wiring storage portion generates a space for storing the wiring material by bending, welding, or screwing. 5.   The solar cell module according to claim 1, wherein the fire spread prevention member is a metal.   The solar cell module according to claim 1, wherein the fire spread prevention member is a refractory material having an adhesive material on one side.   The solar cell module according to claim 1, wherein the fire spread prevention member is ceramic.   2. The solar cell module according to claim 1, wherein the fire spread prevention member is made of a tube-like refractory material attached to an outer periphery of the coating of the wiring material.   The solar cell module according to claim 1, wherein the wiring member has a combustible coating.

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