JP2009021402A - Solar battery module and installing method thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a solar battery module that can protect a surface of a solar battery cell and does not have photodetection performance affected even when left outdoors for a long period, and to provide an installing method thereof. <P>SOLUTION: The solar battery module includes a reinforcing material 4 having a device arrangement area X, the solar battery cell 1 disposed in the device arrangement area X of the reinforcing material 4 so that a photodetection surface may be exposed, and a guard sheet 6 which is fitted to an area other than the device arrangement area X of the reinforcing material 4 with an adhesive layer 5 and covers the solar battery cell 1. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a solar cell module installed on a roof or the like and an installation method thereof.

  Solar cell power generation is attracting attention as a new environmentally friendly energy, and its introduction is progressing smoothly. As for the structure of the solar cell module, many modules using a power generation element sealed with a sealing material such as ethylene-vinyl acetate copolymer (EVA) and glass on the light receiving surface side are commercialized. In light of the fact that it is heavy and difficult to install on a curved surface, a lightweight and flexible module using a fluorine-based film as a protective material on the light receiving surface side instead of glass has been developed.

  As an example of this type of module, there is a metal roof integrated solar cell module in which a material used for a metal roof material such as a galvalume steel plate is used as a back surface reinforcing material of the module. In the case of this module, except for wiring work as a solar cell, a roof with solar cells can be constructed by the same construction method as that of a normal metal roof. Since the module itself uses the roof material as a reinforcing material, it is possible to provide a roof that is excellent in harmony with a normal metal roof portion that is not equipped with a solar cell.

  In the case of a solar cell module that uses a light-transmitting resin material such as a fluorine-based film instead of glass as a protective material on the light-receiving surface side, it can be used in manufacturing processes such as bending the module edge, transportation, and construction work. The possibility that the surface of the solar battery cell is damaged is increased. Accordingly, a method for protecting the surface of the solar battery cell in these steps has been proposed.

For example, in Patent Document 1, in the method for manufacturing a solar cell module including a molding process, after the adhesive film (curing sheet) is attached to the light receiving surface side of the solar cell module, the engaging portion is processed, There is disclosed a method for performing an output characteristic test of a solar cell module and a construction confirmation test in the field while an adhesive film is stuck.
Japanese Patent Laid-Open No. 11-4010

  A solar cell module of the type disclosed in Patent Document 1 is shown in FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. In FIG. 3, reference numeral 11 indicates a solar battery cell. The solar battery cell 11 is sealed with a sealing material 12 such as EVA. On the light-receiving surface side of the sealing material 12, a surface protective material 13 made of ethylene-tetrafluoroethylene copolymer (ETFE) or the like is provided. A reinforcing material 14 is disposed on the back side of the light receiving surface of the solar battery cell 11. In the case of a metal roof integrated solar cell, a galvalume steel plate or the like is often used as the reinforcing material 14. A curing sheet 16 is attached on the surface protection material 13 of the solar battery cell 11 via an adhesive layer 15.

  In actual solar cell module construction, especially in large-scale properties with a large construction area, construction will not be completed in a few days like a private house, and the construction period will be January if we add rain after roof construction and other incidental construction. In some cases, the curing sheet 16 may remain attached to the surface of the solar battery cell 11 during this period. When the curing sheet 16 is left outdoors for a long time in a state where the curing sheet 16 is stuck to the light receiving surface of the solar battery cell 11, the adhesive material of the adhesive material layer 15 becomes the surface of the solar battery cell 11 when the curing sheet is peeled off. If the outdoor exposure is continued in this state, dust or the like adheres to the remaining adhesive material, and the surface of the solar battery cell 11 becomes dirty and the light receiving performance deteriorates.

  The present invention has been made in view of the above points, and can protect the surface of the solar battery cell, and does not affect the light receiving performance even if left outdoors for a long period of time, and its installation method The purpose is to provide.

  The solar cell module of the present invention includes a support base having an element disposition region, a solar cell power generation element disposed such that a light receiving surface is exposed in the element disposition region of the support base, and the support And a sheet material that is attached to an area other than the element arrangement area of the base material via an adhesive material and covers the solar cell power generation element.

  According to this configuration, since the sheet material is attached via the adhesive material in the region where the solar cell power generation element does not exist, even if the sheet material is left outdoors for a long time after removing the sheet material, Since the adhesive material does not remain on the surface of the element, dust or the like adheres to the remaining adhesive material, and the surface of the power generating element for solar cells is not contaminated to reduce the light receiving performance. Moreover, even if the adhesive material remains after the sheet material is removed, it remains in the region where the solar cell power generation element is not disposed, so that the adhesive material can be easily removed without damaging the solar cell power generation element. Can do.

  In the solar cell module of the present invention, the sheet material is preferably transparent or translucent.

  In the solar cell module of this invention, it is preferable to comprise the connector for performing the electrical test | inspection of the said power generating element for solar cells.

  The solar cell module installation method of the present invention includes a step of connecting a plurality of the solar cell modules to form a solar cell string or a solar cell array, and an electrical output of the solar cell module in the solar cell string or solar cell array. And a step of performing an inspection, and a step of removing the sheet material from the solar cell module.

  According to this method, while protecting the surface of a solar cell module in a manufacturing process, damage to the solar cell module during construction can also be prevented. Thereby, the yield of a solar cell module can be improved.

  The solar cell module of the present invention includes a support base having an element disposition region, a solar cell power generation element disposed such that a light receiving surface is exposed in the element disposition region of the support base, and the support A sheet material that is attached to an area other than the element arrangement area of the base material via an adhesive and covers the solar cell power generation element, and can protect the surface of the solar battery cell, A solar cell module that does not affect the light receiving performance even when left outdoors for a long period of time can be realized.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 is a diagram showing a configuration of a solar cell module according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view taken along line II-II in FIG.

  In FIG. 1, reference numeral 1 indicates a solar battery cell. The solar battery cell 1 is sealed with a sealing material 2 such as EVA. A surface protection material 3 is provided on the light receiving surface side of the sealing material 2. As a material constituting the surface protective material 3, it is preferable to use a fluorine-based material such as ethylene-tetrafluoroethylene copolymer (ETFE) from the viewpoint of light transmittance and weather resistance.

  A reinforcing material 4 is disposed on the back side of the light receiving surface of the solar battery cell 1. The solar cell 1 is supported by the reinforcing material 4. In the case of a metal roof integrated solar cell, a galvalume steel plate or the like is often used as the reinforcing material 4. The portion of the reinforcing material 4 on which the solar battery cell 1 is not mounted is subjected to a bending process as a roof material as necessary.

  On the surface protective material 3 of the solar battery cell 1, a curing sheet 6 is attached (attached) via an adhesive layer 5. The curing sheet 6 is preferably transparent or translucent. Moreover, as a material which comprises the curing sheet 6, polyethylene etc. are mentioned. Moreover, as a material of the adhesive material which comprises the adhesive material layer 5, an acrylic adhesive material etc. are mentioned, for example.

  The surface protective material 3 is composed of a film of a fluorine-based material having a thickness of about 100 μm or less, and it is expected that the surface will be damaged by bending processing, transportation, construction work, etc. of the module end. When damaged in the manufacturing process, transportation, construction work, etc., there is a possibility that sufficient performance as a solar cell module cannot be exhibited. Therefore, the curing sheet 6 prevents damage to the surface of the solar cell module. This curing sheet 6 constitutes a solar cell string or a solar cell array by connecting a plurality of solar cell modules in the installation and construction of the solar cell module, and an electrical output of the solar cell module in the solar cell string or the solar cell array After the inspection (for example, confirmation of wiring), the solar cell module is removed.

  As shown in FIG. 2, the curing sheet 6 is attached to a region other than the element arrangement region X (region where the solar cells 1 are present) X of the reinforcing material 4 via the adhesive material layer 5. 1 is covered. The area other than the element arrangement area X can be set without any limitation as long as it does not overlap with the element arrangement area X. The size of the region (adhesion region) Y where the curing sheet 6 is attached to the reinforcing material 4 is not particularly limited as long as the curing sheet 6 can prevent damage to the module surface and exhibits sufficient adhesive force. . For example, the region of 3% to 10% may be secured from both ends in the width direction with respect to the width of the curing sheet 6.

  A cable 7 is drawn out from the back surface side of the solar battery cell 1, and a connector 8 is attached to the end thereof. By using the connector 8 to connect a plurality of solar cell modules in parallel or in series, a string or an array can be configured.

  In the solar cell module having the above-described configuration, the curing sheet 6 is attached via the adhesive material layer 5 in a region where the solar battery cell does not exist, so that the curing sheet 6 is removed and left outdoors for a long time. However, since the adhesive material does not remain on the surface of the solar battery cell 1, dust or the like adheres to the remaining adhesive material, and the surface of the solar battery cell 1 is not soiled to deteriorate the light receiving performance. Moreover, even if the adhesive material remains after the curing sheet 6 is removed, the adhesive material can be easily removed without damaging the solar battery cell because it remains in the region where the solar battery cell 1 is not disposed. .

  In addition, when configuring a solar cell string or solar cell array with a solar cell module, after the solar cell string or solar cell array is configured, the electrical output inspection of the solar cell module is performed with the curing sheet attached. By removing the curing sheet after the inspection, the surface of the solar cell module can be protected in the manufacturing process, and damage to the solar cell module during construction can be prevented. Thereby, the yield of a solar cell module can be improved.

Next, examples performed for clarifying the effects of the present invention will be described.
(Example)
First, an amorphous silicon solar battery cell using a polyimide film having a thickness of 50 μm as a base material was prepared. Sealing of 400 μm thick EVA (manufactured by Bridgestone), solar cell, 400 μm thick EVA (manufactured by Bridgestone) on 0.8 mm thick galvalume steel plate with polyester coating on the surface A plate-like solar cell module was produced by sequentially arranging a material and a surface protective material having a thickness of 25 μm ETFE (manufactured by Asahi Glass Co., Ltd.) and laminating and integrating them using a vacuum laminator apparatus.

  Next, a curing sheet was attached with an adhesive material to an area where the solar battery cells of the solar battery module did not exist, and processing as a roof material was performed using a roll molding machine. A 60 μm thick polyethylene sheet was used as the curing sheet, and an acrylic adhesive material was used as the adhesive material. Thus, the solar cell module (Example) according to the present invention was produced.

With respect to the solar cell module thus obtained, first, the output (initial value) when irradiated with light of 1000 W / m ^{2 with} the curing sheet attached was examined. For correction of output, a conversion factor is calculated from data obtained by comparing the characteristics before and after removing the curing sheet for the number of modules that can be statistically processed in advance, and this measured value is calculated with this conversion factor. It was done by correcting. Thereafter, the sheet was left as it was for 2 weeks, and after that, the curing sheet was peeled off and the power was generated outdoors for about 1 year, and then the light receiving performance of the solar cell module was examined in the same manner as described above. As a result, the light reception performance was only reduced to the extent of normal light degradation. This is because the adhesive material is not provided in the area where the solar cells are present even when left outdoors for a long period of time. This is because there is no adhesion and the amount of incident light is not reduced. In addition, about the adhesive material which remained except the area | region where a photovoltaic cell exists after peeling a curing sheet, it was able to remove easily, without damaging a photovoltaic cell.

  The solar cell module which grasped the behavior of the adhesive material of the curing sheet by the above experiment was actually constructed. About the performance test after construction of a solar cell module, the current-voltage characteristic of the string of the solar cell module was evaluated with the curing sheet attached. As a result, there was no problem, and the curing sheet was left attached for about one month until the roof construction was completed, and the curing sheet was removed immediately before delivery to the owner, but there was no problem.

(Comparative example)
A solar cell module (comparative example) was produced in the same manner as in the example except that a curing sheet was attached to the region of the solar cell module where the solar cells were present with an adhesive. About the solar cell module obtained in this manner, the output (initial value) when irradiated with light of 1000 W / m ² with the curing sheet still attached was examined in the same manner as in the example. After standing for 2 weeks in the state, the curing sheet was peeled off, and after generating electricity outdoors for about 1 year, the light receiving performance of the solar cell module was examined in the same manner as described above. As a result, the light receiving performance was lowered more than the normal light deterioration. This is presumably because the adhesive material remaining in the region where the solar cells are present contaminates the surface of the solar cells, and dust or the like adheres to the adhesive material to greatly reduce the amount of incident light.

  The present invention is not limited to the above embodiment, and can be implemented with various modifications. Moreover, there is no restriction | limiting in particular about the numerical value, dimension which were demonstrated in the said embodiment, the positional relationship of a member, and a material. Other modifications may be made as appropriate without departing from the scope of the object of the present invention.

  The present invention is applicable to, for example, a solar cell module installed on the roof of a building.

It is a figure which shows the structure of the solar cell module which concerns on embodiment of this invention. It is sectional drawing which follows the II-II line of FIG. It is a figure which shows the structure of the conventional solar cell module. It is sectional drawing which follows the IV-IV line of FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Solar cell, 2 ... Sealing material, 3 ... Surface protection material, 4 ... Reinforcement material, 5 ... Adhesive material layer, 6 ... Curing sheet, 7 ... Cable, 8 ... Connector.

Claims (4)

  A support substrate having an element disposition region; a solar cell power generation element disposed such that a light receiving surface is exposed in the element disposition region of the support substrate; and the element disposition region of the support substrate A solar cell module comprising: a sheet material that is attached to an area other than the above via an adhesive material and covers the solar cell power generation element.   The solar cell module according to claim 1, wherein the sheet material is transparent or translucent.   The solar cell module according to claim 1, further comprising a connector for performing an electrical inspection of the solar cell power generation element.   A step of connecting a plurality of solar cell modules according to any one of claims 1 to 3 to form a solar cell string or a solar cell array, and an electric of the solar cell module in the solar cell string or solar cell array An installation method for a solar cell module, comprising: an output inspection step; and a step of removing the sheet material from the solar cell module.

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