JP2001077381A - Solar battery module - Google Patents

Abstract

PROBLEM TO BE SOLVED: To form a highly safe, highly impact-resistant solar battery module wherein glass chips do not scatter around even if broken, by covering photoelectric transducer cells and rear electrodes with a wire mesh filled with a resin filler. SOLUTION: A solar battery module 11 has transparent backside electrodes 13 and semiconductor photoelectric transducer layers made of amorphous silicon, etc., (hereinafter referred to as 'photoelectric transducer cells 14') arranged on the backside of a landscape-formed rectangular glass substrate 12 in such a manner that they are arranged in a plurality of stages in the vertical direction of the substrate 12 with their longitudinal direction matching with the horizontal direction of the substrate 12. The electrodes 13 and the cells 14 are covered with a wire mesh 16 filled with a resin filler 15, and the mesh 16 is covered with a translucent member 17 such as glass or resin film, whereby all these members are integrally formed. Therefore, by covering the electrodes 13 and the cells 14 with the filler 15, the solar battery module can be mounted on a roof, a window, etc., as a member for admitting light.

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 used, for example, as a roofing material for a building or a skylight panel.

[0002]

2. Description of the Related Art A solar cell system has been put to practical use in which a plurality of solar cell modules are laid on a roof of a house or the like to convert solar energy into electric energy, thereby supplementing the original power consumption and saving power consumption. .

The solar cell module has a transparent electrode layer, a photoelectric conversion cell made of amorphous silicon, and a back electrode layer formed on a single glass substrate, for example. A plastic film is laminated on the back surface via a protective layer. , And has a horizontally long rectangular thin panel structure.

Further, there is provided a solar cell module in which tempered glass is provided on the light receiving surface side, and a shield conductor formed in a grid or mesh shape by a metal wire is provided in the tempered glass so as to absorb an external surge. JP-A-60-
It is known from JP 189272.

[0005] Further, as a roof material other than the solar cell, a glass substrate made of a colored glass such as a tempered glass, a netted glass, and a lined glass in order to harmonize with the solar cell module has been disclosed in Japanese Patent Application Laid-Open No. HEI 10-163568. It is known from JP-A-10-227102.

Further, in a solar cell module, one or both of a transparent plate for covering a photoelectric conversion cell and a back cover are interposed with a mesh impregnated with an adhesive resin, as disclosed in Japanese Unexamined Patent Application Publication No. 9-0995. No. 69646.

In this solar cell module, the mesh is formed of a glass fiber non-woven fabric, and the mesh is
It is impregnated with a vinyl acetate copolymer (EVA resin) or the like, in which the resin is prevented from dripping during a combustion test to make the solar cell module flame-retardant or non-flammable. Therefore, the glass fiber non-woven fabric has a high density to increase the holding power of the resin.
It is formed so that the resin does not melt and drop during the combustion test.

[0008]

Accordingly, it is disclosed in Japanese Unexamined Patent Publication No. Sho 60-189272 that a glass substrate of a solar cell module and a glass substrate as a roofing material for harmonizing with the solar cell module are provided with a mesh. And JP-A-10
No. 2,227,102. However, when a metal mesh is put in a glass substrate, the glass and the metal have different thermal expansion coefficients, and thus there is a problem that the glass substrate is easily broken when heated by sunlight.

As described in JP-A-9-69646, when a high-density glass fiber nonwoven fabric impregnated with an EVA resin is bonded to a glass substrate, the above-mentioned problem is solved. If a high-density glass fiber nonwoven fabric impregnated with EVA resin is provided, there is a problem that the light transmittance is reduced and the power generation efficiency of the solar cell is reduced.

The present invention has been made in view of the above circumstances, and has as its object to reduce the power generation efficiency of a solar cell, to provide a high impact strength, and to obtain glass fragments even if broken. It is an object of the present invention to provide a highly safe solar cell module that does not scatter.

[0011]

To achieve the above object, the present invention provides a solar cell module in which a photoelectric conversion cell and a back electrode are provided on the back surface of a glass substrate. The back electrode is covered with a wire mesh filled with a resin filler.

According to a second aspect of the present invention, in the solar cell module having a photoelectric conversion cell and a back electrode provided on a back surface of a glass substrate, the photoelectric conversion cell and the back electrode are covered with a wire mesh filled with a resin filler, and the wire mesh is further passed through. It is characterized by being covered with an optical member.

A third aspect of the present invention is characterized in that a spacer made of a nonwoven fabric is interposed between the photoelectric conversion cell and the back electrode and the metal mesh filled with a resin filler.

According to a fourth aspect of the present invention, in a solar cell module having a photoelectric conversion cell and a back electrode provided on a back surface of a glass substrate, the surface of the glass substrate is covered with a wire mesh filled with a resin filler, and the wire mesh is further made of tempered glass. It is characterized by being covered.

According to the above construction, when the solar cell module is installed as a skylight on a roof or the like, when the solar light L enters the solar cell module, the photoelectric conversion cells constituting the solar cell module convert the solar energy into electricity. It can be converted into energy and extracted as electrical energy. Further, since the glass substrate and the wire mesh filled with the filler have a light-transmitting property, sunlight is guided into the room through the solar cell module. Therefore, the solar cell module can be used as electric energy, which can be used as electric energy, in addition to its original purpose, as a light complying with the Building Standard Law.

[0016]

Embodiments of the present invention will be described below with reference to the drawings.

1 to 4 show a first embodiment, and FIG.
2 is a vertical side view of the solar cell module, FIG. 2 is a front view of the solar cell module, FIG. 3 is a vertical side view of the solar cell module showing a modification of the first embodiment, and FIG. It is a longitudinal side view shown.

As shown in FIG. 1 and FIG. 2, the solar cell module 11 has a transparent photoelectric conversion layer (hereinafter, referred to as an amorphous silicon) and a transparent back electrode 13 on the back side of a horizontally long rectangular glass substrate 12. Photoelectric conversion cell 14
) Are arranged in a plurality of stages in the vertical direction with the longitudinal direction as the horizontal direction. In the solar cell module 11, the plurality of photoelectric conversion cells 14 are electrically connected in series so that the output voltage is increased and the output current is decreased in order to increase the power generation efficiency.

The back electrode 13 and the photoelectric conversion cell 14
Is a resin filler 15, for example, an ethylene-vinyl acetate copolymer (EVA resin), a polyvinyl butyral resin (P
(VA resin) and a wire mesh 16 filled with a resin filler 15 made of silicone, and the wire mesh 16 is covered with a translucent member 17 such as glass or a resin film to be integrally formed.

The wire net 16 is formed of a thin metal wire (for example, about 0.1 mmφ) so as not to impede light transmission.
It is a mesh net having a mesh of 3 cm × 2 to 3 cm and knitted in a square lattice. In the case of EVA resin, the wire mesh 1
6, an EVA resin sheet is superimposed on one or both sides, and is heated and melted to impregnate and solidify a metal mesh 16 with a resin filler 15 made of EVA resin. EVA
The resin filler 15 made of resin has adhesiveness and translucency, is integrally connected to the wire net 16, and covers the entire surface of the back electrode 13 and the photoelectric conversion cell 14. Further, the translucent member 17 is laminated with an adhesive or the like to the wire net 16 filled with the resin filler 15, but the translucent member 17 is not necessarily provided.

FIG. 3 shows a modification, which is basically the same as that of the first embodiment, except that a back electrode 13 and a photoelectric conversion cell 14 and a wire mesh 16 filled with a resin filler 15 have, for example, This is one in which a spacer 24 made of a glass fiber nonwoven fabric is interposed. With this configuration, the wire mesh 16
And the back electrode 13 and the photoelectric conversion cell 14 with the spacer 24
Can be kept electrically insulated by
The peeling phenomenon due to the difference in thermal expansion coefficient between the back electrode 13 and the metal mesh 16 filled with the resin filler 15 and the photoelectric conversion cell 14 can be prevented.

A frame 18 is provided on the outer peripheral edge of the solar cell module 1 configured as described above, and as shown in FIG.
By mounting through the window 8, it can be used as a skylight 21.

When the solar cell module 11 is constructed as the skylight 21 as described above, when the solar light L enters the solar cell module 11, the photoelectric conversion cells 14 constituting the solar cell module 11 convert the solar energy into electric energy. And can be extracted as electrical energy.

Since the glass substrate 12, the wire mesh 16 filled with the resin filler 15, and the translucent member 17 have translucency, the sunlight L is transmitted through the solar cell module 11 and guided indoors. Therefore, the solar cell module 11 can be used as electric energy to be taken out as electric energy.

Further, by covering the entire back surface of the glass substrate 12 provided with the back electrode 13 and the photoelectric conversion cell 14 on the back surface with the wire mesh 16 filled with the resin filler 15, the wire mesh 16 filled with the resin filler 15 is formed. The effect as an impact buffer improves the impact strength, and even if the glass substrate 12 is broken by a falling object or the like, scattering of glass fragments can be prevented by the wire mesh 16 filled with the resin filler 15.
Safety can be improved.

FIGS. 5 and 6 show the second embodiment. The same components as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted. As shown in FIG. 4, in the solar cell module 11 of the present embodiment, a transparent back electrode 13 and a photoelectric conversion cell 14 are arranged in a plurality of stages in the vertical direction with the longitudinal direction being the horizontal direction on the rear surface side of the glass substrate 12. The plurality of photoelectric conversion cells 14 are electrically connected in series.

The back electrode 13 and the photoelectric conversion cell 14 are covered with a protective film 22 having a light transmitting property. Further, the surface of the glass substrate 12 is covered with a wire mesh 16 filled with a resin filler 15 made of EVA resin, PVA resin, or silicone.
And are integrally configured.

The wire netting 16 is a mesh net having a mesh formed by knitting it into a rectangular lattice with thin metal wires so as not to hinder light transmission, as in the first embodiment. In the case of EVA resin, the wire netting 16 An EVA resin sheet is superimposed on one or both sides, and is heated and melted to impregnate and solidify a metal mesh 16 with a resin filler 15 made of EVA resin. The resin filler 15 made of EVA resin has adhesiveness and translucency, and is integrally connected to the wire mesh 16. Further, the tempered glass 23 adheres to the wire mesh 16 filled with the filler 15. Are bound by an agent or the like.

FIG. 6 shows that, when the solar cell module 11 is constructed as a skylight 21, when the solar light L enters the solar cell module 11 through the wire mesh 16 filled with the reinforced glass 23 and the resin filler 15, The photoelectric conversion cells 14 constituting the battery module 11 can convert sunlight energy into electric energy and take out the electric energy.

Since the wire mesh 16 filled with the tempered glass 23 and the resin filler 15 has translucency, the sunlight L is transmitted and guided into the room. Therefore, the solar cell module 11
Is extracted as electric energy. In addition to its original purpose,
It can be used as a light that complies with the Building Standards Law.

According to the above-described embodiment, the case where the solar cell module is mounted on the skylight opening on the roof and used for lighting is described. However, the case where the solar cell module is laid on the sloped roof of the house is described. Of course, it can be applied to the case where a solar cell module installation tower with a slope is constructed on a vacant lot or a rooftop, and the solar cell module is laid on the slope of the installation tower. It can be lit by mounting it on a window frame.

[0032]

As described above, according to the present invention, the photoelectric conversion cell and the back electrode of the solar cell module are covered with a metal mesh filled with a resin filler, or the surface of the glass substrate is coated with the resin filler. By covering with a filled wire mesh and further covering the wire mesh with tempered glass, the solar cell module can be mounted on a roof or a window as a skylight.

Therefore, the solar energy incident on the solar cell module can be converted into electric energy and taken out as electric energy, and the solar rays can be transmitted through the solar cell module and guided indoors, and the solar cell module can be electrically operated. It can be used as energy that can be extracted as energy and that is compliant with the Building Standards Law in addition to its original purpose.

Further, the wire mesh filled with the resin filler acts as an impact buffering material, thereby improving the impact strength. Even if the glass substrate is damaged by falling objects, the glass mesh filled with the filler is used to form the glass. Scattering of fragments can be prevented, and safety can be improved.

[Brief description of the drawings]

FIG. 1 is a vertical sectional side view of a solar cell module showing a first embodiment of the present invention.

FIG. 2 is a front view of the solar cell module of the embodiment.

FIG. 3 is a vertical sectional side view of a solar cell module showing a modification of the embodiment.

FIG. 4 is a vertical cross-sectional side view showing a construction example of the solar cell module of the embodiment.

FIG. 5 is a vertical sectional side view of a solar cell module showing a second embodiment of the present invention.

FIG. 6 is a longitudinal sectional side view showing a construction example of the solar cell module of the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 ... Solar cell module 12 ... Glass substrate 13 ... Back surface electrode 14 ... Photoelectric conversion cell 15 ... Resin filler 16 ... Wire mesh

Claims (4)

[Claims] 1. A solar cell module having a photoelectric conversion cell and a back electrode provided on a back surface of a glass substrate, wherein the photoelectric conversion cell and the back electrode are covered with a wire mesh filled with a resin filler. . 2. A solar cell module having a photoelectric conversion cell and a back electrode provided on a back surface of a glass substrate, wherein the photoelectric conversion cell and the back electrode are covered with a wire mesh filled with a resin filler, and the wire mesh is made of a translucent member. A solar cell module characterized by being covered with a solar cell. 3. The solar cell module according to claim 1, wherein a spacer made of a nonwoven fabric is interposed between the photoelectric conversion cell and the back electrode and a wire mesh filled with a resin filler. 4. A solar cell module in which a photoelectric conversion cell and a back electrode are provided on a back surface of a glass substrate, wherein the surface of the glass substrate is covered with a wire mesh filled with a resin filler, and the wire mesh is further covered with tempered glass. A solar cell module characterized by the above-mentioned.