WO2013031078A1

WO2013031078A1 - Solar cell module

Info

Publication number: WO2013031078A1
Application number: PCT/JP2012/004516
Authority: WO
Inventors: 篠原　亘
Original assignee: 三洋電機株式会社
Priority date: 2011-08-31
Filing date: 2012-07-12
Publication date: 2013-03-07
Also published as: JP2014212137A

Abstract

The solar cell module (10) set forth in this embodiment is provided with: a translucent member (16) positioned on a light receiving side; a rear surface member (26) disposed in such a manner as to face the translucent member; a photovoltaic device (12) disposed between the translucent member (16) and the rear surface member (26); interconnectors (22) that output electric energy generated by the photovoltaic device (12) to the outside; and a fixing member (18) disposed on the surface of the rear surface member (26). The translucent member (16) has a light incident section on the outer edge of a light-receiving surface upon which light from the outside falls. Through-holes (26a), through which lead wires (22b) that are part of the interconnectors (22) pass, are formed in the rear surface member (26). The fixing member (18) has a space that is formed between the through-holes (26a), and is disposed in such a manner as to cover the through-holes (26a). Furthermore, the fixing member (18) functions as an attachment part for attaching the solar cell module to a frame when installing the solar cell module.

Description

Solar cell module

The present invention relates to a solar cell module.

Conventionally, so-called solar cells have been vigorously developed in various fields as photoelectric conversion devices that convert light energy into electrical energy. Solar cells are expected to be a new energy source because they can directly convert light from the sun, a clean and inexhaustible energy source, into electricity.

Solar cells are often modularized and have an output terminal for outputting generated electricity to the outside. Such an output terminal is usually provided in a state of protruding to the back surface side opposite to the sunlight receiving surface. Moreover, the solar cell module in which the accommodating part for accommodating such an output terminal is provided in the back surface center of the solar cell panel is devised (for example, refer patent document 1).

The storage section in the above-described solar cell module stores a solder joint for electrically connecting the terminal-side internal lead wire sealed in the solar cell panel and the waterproof-coated external lead wire, a diode for preventing backflow, and the like. These objects are sealed with a filling adhesive such as silicone resin.

JP-A-9-279789

However, if such a storage part does not have sufficient adhesion area with the back side member of the solar cell panel, there is a possibility of moisture intrusion when exposed to a long-term outdoor environment and dropout due to tension over the output cable There is room for improvement. In addition, when the junction box is made of a resin material, it is necessary to take into account the deterioration (deterioration) of the material due to exposure to the outdoor environment.

The present invention has been made in view of such circumstances, and an object of the present invention is to provide a technique for improving the connection reliability between the solar cell module and the outside.

In order to solve the above problems, a solar cell module according to an aspect of the present invention includes a translucent member disposed on the light receiving side, a back member provided to face the translucent member, and a translucent member A photovoltaic device provided between the member and the back surface member, wiring for outputting electric energy generated by the photovoltaic device to the outside, and a fixing member provided on the surface of the back surface member . The translucent member has an incident portion on the outer edge of the light receiving surface where light enters from the outside. The back member is formed with a through-hole through which a part of the wiring is passed, and the fixing member is provided so as to cover the through-hole while a space is formed between the through-hole and When the solar cell module is installed, it functions as an attachment portion attached to the gantry.

According to the present invention, the connection reliability between the solar cell module and the outside can be improved.

1 is an overall perspective view of a solar cell module according to a first embodiment. It is an enlarged view of the area | region R shown in FIG. It is a disassembled perspective view of the solar cell module which concerns on 1st Embodiment. 4 is a cross-sectional view of the solar cell module taken along the line AA in FIG. It is a schematic diagram which shows the cross section of an example of a photovoltaic device. It is the schematic diagram which looked at the output terminal vicinity fixed to the fixing member from the side surface. It is a schematic diagram of the cross section for demonstrating the process of the manufacturing method of the solar cell module which concerns on this Embodiment. It is a schematic diagram of the cross section for demonstrating the process of the manufacturing method of the solar cell module which concerns on this Embodiment. It is a disassembled perspective view of the solar cell module which concerns on 2nd Embodiment. It is a disassembled perspective view of the solar cell module which concerns on 3rd Embodiment. FIG. 11 is a BB cross-sectional view in the vicinity of the fixing member shown in FIG. 10. It is a disassembled perspective view of the solar cell module which concerns on 4th Embodiment. FIG. 13 is a CC cross-sectional view in the vicinity of the fixing member shown in FIG. 12.

Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the drawings. In the description of the drawings, the same elements are denoted by the same reference numerals, and repeated descriptions are omitted as appropriate.

The scales and shapes of each layer and each part shown in the following drawings are set for convenience of explanation, and are not interpreted in a limited manner unless otherwise specified.

(First embodiment)
FIG. 1 is an overall perspective view of the solar cell module according to the first embodiment. FIG. 2 is an enlarged view of the region R shown in FIG. FIG. 3 is an exploded perspective view of the solar cell module according to the first embodiment. 4 is a cross-sectional view taken along the line AA of the solar cell module shown in FIGS.

The solar cell module 10 includes a photovoltaic device 12, a translucent member 16, a fixing member 18, an interconnector 22, a filler 24, and a back member 26 as a protective material.

The photovoltaic device 12 is a rectangular flat plate or film-like unit, and is arranged in a state where a plurality of photovoltaic elements described later are aligned. The respective photovoltaic elements are appropriately connected in series or in parallel with each other.

The translucent member 16 is disposed on the light receiving side of the solar cell module. The translucent member 16 is made of a material that transmits light, and a plurality of photovoltaic elements are formed as the photovoltaic device 12 on the back surface 16b opposite to the light receiving surface 16a. .

Thus, the translucent member 16 is disposed so as to cover the photovoltaic device 12 when the light receiving surface 16a is viewed from the front. In addition, as the translucent member 16, insulating glass, plastic, or the like can be used, and in particular, a material having high transmittance with respect to light having a wavelength included in sunlight is preferable. Moreover, the translucent member 16 has the incident part 16d in which light injects from the exterior in the outer edge of the light-receiving surface 16a.

The back member 26 is provided to face the translucent member 16. Further, the back surface member 26 is formed with a through hole 26a through which a part of the interconnector 22 is passed.

Next, the photovoltaic element will be described. FIG. 5 is a schematic view showing a cross section of an example of the photovoltaic element. The photovoltaic element 28 includes a first electrode layer 30, a semiconductor layer 32, a transparent conductive film 34, and a second electrode layer 36. The first electrode layer 30, the semiconductor layer 32, the transparent conductive film 34, and the second electrode layer 36 are sequentially stacked on the translucent member 16 while performing known laser patterning. A filler 24 and a back member 26 are laminated on the second electrode layer 36.

The first electrode layer 30 is formed on the surface of the translucent member 16 and has conductivity and translucency. As the first electrode layer 30 according to the present embodiment, a transparent conductive oxide (TCO) is used, and in particular, zinc oxide (ZnO) having high light transmittance, low resistance, and low cost is used. Used.

The semiconductor layer 32 generates charges (electrons and holes) by incident light from the first electrode layer 30 side. As the semiconductor layer 32, for example, an amorphous (amorphous) silicon semiconductor layer having a pin junction or a pn junction as a basic structure, or a single layer or a stacked body of a microcrystalline silicon semiconductor layer can be used. The semiconductor layer 32 according to the present embodiment is configured by laminating an amorphous silicon semiconductor and a microcrystalline silicon semiconductor from the first electrode layer 30 side. Note that in this specification, the term “microcrystal” means not only a complete crystal state but also a state partially including an amorphous state.

The transparent conductive film 34 is formed on the semiconductor layer 32. The transparent conductive film 34 prevents the semiconductor layer 32 and the second electrode layer 36 from being alloyed, and the connection resistance between the semiconductor layer 32 and the second electrode layer 36 can be reduced.

The second electrode layer 36 is formed on the transparent conductive film 34. A reflective metal such as silver (Ag) is used for the second electrode layer 36. The transparent conductive film 34 and the second electrode layer 36 of one photovoltaic element 28 are in contact with the first electrode layer 30 of another adjacent photovoltaic element 28. Thereby, one photovoltaic element 28 and the other photovoltaic element 28 are electrically connected in series.

The interconnector 22 shown in FIGS. 3 and 4 is a wiring that outputs the electrical energy (charge) generated by the plurality of photovoltaic elements 28 connected in series in this manner to the outside of the solar cell module 10. . The interconnector 22 is connected to the photovoltaic elements 28 at both ends of the plurality of photovoltaic elements 28 connected in series, and rises from the approximate center of the conducting part 22a toward the back member 26. And a lead-out wiring 22b. The interconnector 22 is preferably a low resistivity material such as copper (Cu).

The filler 24 is disposed so as to seal the photovoltaic device 12 and the interconnector 22 between the translucent member 16 and the back surface member 26 and to buffer the impact applied to the photovoltaic element 28. . Further, the filler 24 has a through hole 24 a formed at a position corresponding to the through hole 26 a of the back surface member 26 to be laminated. In the present embodiment, ethylene vinyl acetate (EVA) is used as the filler 24. In the present embodiment, inexpensive blue glass (float glass) is used as the back member 26. In addition, the blue plate glass contains alkali metals, such as sodium (Na), as an impurity ion, for example. The back member 26 improves the strength of the entire solar cell module 10 and prevents moisture and impurities from entering from the back side of the solar cell module 10.

[Fixing member]
Next, the fixing member 18 will be described in detail. As shown in FIG. 3, the fixing member 18 is provided on the surface of a rectangular back surface member 26. The fixing member 18 has a space 18a formed between the fixing member 18 and the through hole 26a, and is provided so as to cover the through hole 26a. The fixing member 18 is manufactured by bending a plate-shaped member, and includes a rectangular flat covering portion 18b, two side surfaces 18c bent from two long sides of the rectangle, and a back surface. And a flange portion 18d fixed directly to the member 26. The flange portion 18d is fixed to the surface of the back member 26 through an adhesive layer (not shown).

The fixing member 18 functions as an attachment portion that is attached to the gantry when the solar cell module 10 is installed. As a result, the fixing member 18 is also used as a reinforcing member or an attachment member, and the cost can be further reduced by reducing the number of parts. When there are a plurality of mounting members, it is not necessary that all the fixing members 18 also serve as these mounting members, and it is sufficient that at least one or more mounting members are also used.

Thus, in the solar cell module 10 according to the present embodiment, since the through hole 26a of the back surface member 26 is covered by the fixing member 18, the entry of foreign matters such as moisture from the outside is suppressed. Therefore, deterioration of elements and wirings inside the solar cell module and deterioration at the joint portion thereof are reduced, and the connection reliability between the solar cell module and the outside can be improved.

The fixing member 18 is produced by bending a plate-like member as described above. Therefore, it may be said that the fixing member 18 has a shape that increases the rigidity of the solar cell module 10. Thereby, it is not necessary to newly provide a member for increasing the rigidity of the solar cell module, and the cost can be reduced by reducing the number of parts. Moreover, the fixing member 18 is good to be comprised with metal materials, such as a galvanized steel plate. Thereby, the fixing member 18 which raises the rigidity of a solar cell module can be manufactured cheaply and simply.

The fixing member 18 is provided such that its longitudinal direction is parallel to any side of the back member 26 (short side in the case of FIG. 3). Thereby, the intensity | strength of the solar cell module 10 can be raised equally. The length of the fixing member 18 in the longitudinal direction is shorter than the length of one side of the back member 26 parallel to the longitudinal direction.

The fixing member 18 may have an output terminal for outputting electric energy generated by the photovoltaic device 12 to the outside. FIG. 6 is a schematic view of the vicinity of the output terminal fixed to the fixing member as viewed from the side.

As shown in FIG. 3, the fixing member 18 has two holes 18e for fixing the output terminal to the covering portion 18b. As shown in FIG. 6, the output terminal 40 is fixed to the fixing member 18 by a fastening member such as a screw. One end of the lead-out wiring 22b of the interconnector 22 is drawn out to the space 18a between the through-hole 26a and the fixing member 18 via the through-hole 26a and connected to the output terminal 40. Thereby, the force applied from the outside via the output terminal 40 is distributed to the fixing member 18 and is prevented from being directly applied to the lead-out wiring 22b.

(Method for manufacturing solar cell module)
Next, the manufacturing method of a solar cell module provided with the above-mentioned solar cell is demonstrated. In the following, a solar cell module including a plurality of photovoltaic elements 28 will be described. However, a solar cell module including one photovoltaic element 28 may be used.

7 and 8 are schematic cross-sectional views for explaining the steps of the method for manufacturing the solar cell module according to the present embodiment.

First, as shown in FIG. 7A, a first electrode layer 30 made of zinc oxide (ZnO) having a thickness of 600 nm is formed on a translucent member 16 made of glass having a thickness of 4 mm by sputtering. And the YAG laser is irradiated from the 1st electrode layer 30 side of the translucent member 16, and the 1st electrode layer 30 is patterned in strip shape. For the laser separation processing, an Nd (neodymium): YAG laser having a wavelength of 1064 nm, an energy density of 13 J / cm ² and a pulse frequency of 3 kHz is used.

Next, as shown in FIG. 7B, a semiconductor layer 32 is formed by a plasma processing apparatus (plasma CVD). The semiconductor layer 32 includes a p-type amorphous silicon semiconductor film having a thickness of 15 nm, an i-type amorphous silicon semiconductor film having a thickness of 200 nm, an n-type amorphous silicon semiconductor film having a thickness of 30 nm, a p-type microcrystalline silicon semiconductor film having a thickness of 30 nm, An i-type microcrystalline silicon semiconductor film having a thickness of 2000 nm and an n-type microcrystalline silicon semiconductor film having a thickness of 30 nm are sequentially stacked on the first electrode layer 30.

The p-type amorphous silicon semiconductor film is formed using a mixed gas of monosilane (SiH ₄ ), methane (CH ₄ ), hydrogen (H ₂ ), and diborane (B ₂ H ₆ ) as a source gas. The i-type amorphous silicon semiconductor film is formed using a mixed gas of monosilane (SiH ₄ ) and hydrogen (H ₂ ) as a source gas. The n-type amorphous silicon semiconductor film is formed using a mixed gas of monosilane (SiH ₄ ), hydrogen (H ₂ ) and phosphine (PH ₃ ) as a source gas.

The p-type microcrystalline silicon semiconductor film is formed using a mixed gas of monosilane (SiH ₄ ), hydrogen (H ₂ ), and diborane (B ₂ H ₆ ) as a source gas. The i-type microcrystalline silicon semiconductor film is formed using a mixed gas of monosilane (SiH ₄ ) and hydrogen (H ₂ ) as a source gas. The n-type microcrystalline silicon semiconductor film is formed using a mixed gas of monosilane (SiH ₄ ), hydrogen (H ₂ ), and phosphine (PH ₃ ) as a source gas. The details of the film forming conditions of each film by the plasma processing apparatus are shown in Table 1 below.

Note that 30 nm-thick silicon oxide (SiO _x ) may be provided as an intermediate layer between the n-type amorphous silicon semiconductor film and the p-type microcrystalline silicon semiconductor film. Such an intermediate layer is formed by sputtering or the like.

The YAG laser is irradiated from the front surface side (translucent member 16 side) to a position deviated from the patterning position of the stacked semiconductor layer 32 and first electrode layer 30 and formed on the back surface side of the translucent member 16. The semiconductor layer 32 is removed so as to be separated and patterned into a strip shape. For the laser separation processing, an Nd (neodymium): YAG laser having a wavelength of 532 nm (second harmonic), an energy density of 0.7 J / cm ² , and a pulse frequency of 3 kHz is used.

Next, as shown in FIG. 7C, a transparent conductive film 34 made of zinc oxide (ZnO) is formed on the semiconductor layer 32 by sputtering. The transparent conductive film 34 is also formed in regions and side edges where the semiconductor layer 32 has been removed by patterning.

Then, as shown in FIG. 8A, a 200 nm-thick silver (Ag) film is formed on the transparent conductive film 34 by sputtering to form a second electrode layer 36. At this time, the second electrode layer 36 is also formed on the transparent conductive film 34 in the region where the semiconductor layer 32 is removed by patterning.

Next, as shown in FIG. 8B, the semiconductor layer 32, the transparent conductive film is irradiated by irradiating the portion shifted from the patterning position of the semiconductor layer 32 with the YAG laser from the surface side (translucent member 16 side). 34 and the second electrode layer 36 are separated and patterned into strips. For the laser separation processing, an Nd (neodymium): YAG laser having a wavelength of 532 nm, an energy density of 0.7 J / cm ² , and a pulse frequency of 4 kHz is used. Thereby, a plurality of photovoltaic elements 28 are formed.

Next, as shown in FIG. 8C, the transparent conductive film 34 and the second electrode layer 36 that wrap around the side portions (outermost circumference) of the first electrode layer 30 and the semiconductor layer 32 are irradiated from the surface side. Removed by a laser. For the laser removal processing, an Nd (neodymium): YAG laser having a wavelength of 1064 nm, an energy density of 13 J / cm ² and a pulse frequency of 3 kHz is used.

Thus, a plurality of photovoltaic elements 28 connected in series with each other are formed on the translucent member 16.

Next, as shown in FIG. 3, the translucent member 16 provided with the photovoltaic device 12 on one surface is prepared by the method described above. Then, the interconnector 22 is arranged on the photovoltaic device 12, and the lead-out wiring 22b is brought up.

Next, as shown in FIG. 3, a sheet-like filler 24 made of ethylene vinyl acetate (EVA) and a back member 26 covering the photovoltaic device 12 are arranged on the photovoltaic device 12. The filler 24 is provided with a through hole 24a so that one end of the lead wire 22b is drawn to the outside, and the lead wire 22b is passed through the through hole 24a. Further, the back member 26 is provided with a through hole 26a, and the lead-out wiring 22b is passed through the through hole. The translucent member 16 and the back member 26 have the same outer dimensions.

In this state, the solar cell module 10 is manufactured by heating the translucent member 16 and the back member 26 while pressing them in a vacuum atmosphere. At that time, the light-transmitting member 16 and the back surface member 26 are brought into close contact with each other when the melted filler 24 enters the gap, and the filler 24 also enters the through hole 26a of the back surface member 26, thereby pulling out. The wiring 22 b is firmly fixed to the through hole 26 a of the back member 26.

And as shown in FIG. 3, the fixing member 18 is arrange | positioned so that the through-hole 26a may be covered, and it fixes to the back surface member 26. FIG. At this time, the lead wiring 22b and the output terminal 40 are connected.

(Second Embodiment)
FIG. 9 is an exploded perspective view of the solar cell module according to the second embodiment. The solar cell module 110 according to the present embodiment is largely characterized in that the positions of the through holes are different from those of the solar cell module 10 according to the first embodiment. The solar cell module 110 includes two fixing members according to the positions of the through holes. In addition, about the structure similar to 1st Embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted suitably.

The solar cell module 110 includes a photovoltaic device 12, a translucent member 16 disposed on the light receiving side of the solar cell module, two fixing members 118, an interconnector 122, a filler 124, and a back member as a protective material. 126.

The interconnector 122 is a wiring that outputs electric energy (charge) generated by the plurality of photovoltaic elements 28 to the outside of the solar cell module 10. The interconnector 22 is connected to the photovoltaic element 28 at both ends of the plurality of photovoltaic elements 28 connected in series, and from the position near the end of the conducting part 122a toward the back member 126. And a lead-out wiring 122b provided so as to rise. The two lead wirings 122b are provided at positions that are substantially symmetrical with respect to the center of the translucent member 16.

The back member 126 is provided so as to face the translucent member 16. Further, the back surface member 126 is formed with a through hole 126a through which a part of the lead-out wiring 122b of the interconnector 22 is passed.

The filler 124 has a through hole 124 a formed at a position corresponding to the through hole 126 a of the back member 126 to be laminated.

Next, the fixing member 118 will be described in detail. The fixing member 118 has substantially the same configuration as that of the first embodiment, but the cover portion 18b of one fixing member 118 is formed with one hole 18e for fixing the output terminal. The fixing member 118 is disposed at a position covering the through hole 126a of the back surface member 126. In other words, the through hole 126 a of the back member 126 is formed at a position covered with the fixing member 118.

Thus, in the solar cell module 110 according to the present embodiment, since the through holes 126a of the back surface member 126 are covered by the respective fixing members 118, entry of foreign matters such as moisture from the outside is suppressed. Therefore, deterioration of elements and wirings inside the solar cell module and deterioration at the joint portion thereof are reduced, and the connection reliability between the solar cell module and the outside can be improved.

Further, the two fixing members 118 are provided such that the longitudinal direction thereof is parallel to any side of the back surface member 126 (short side in the case of FIG. 3). Thereby, the intensity | strength of the solar cell module 10 can be raised equally. The two fixing members 118 are arranged symmetrically with respect to two center lines L1 and L2 passing through the center of the rectangular back surface member 126. That is, the two fixing members 118 are arranged at positions symmetrical with respect to the center line L2. In addition, each fixing member 118 is disposed such that the longitudinal direction thereof is perpendicular to the center line L1 and the center portion substantially coincides with the center line L1.

As described above, since the two fixing members 118 are arranged at target positions with respect to the center of the back surface member 126 or the straight line passing through the center of the back surface member 126, the strength of the solar cell module 110 can be evenly increased. it can.

(Third embodiment)
FIG. 10 is an exploded perspective view of the solar cell module according to the third embodiment. 11 is a cross-sectional view taken along the line BB in the vicinity of the fixing member shown in FIG. The solar cell module 210 according to the present embodiment is greatly different from the solar cell module 10 according to the first embodiment in that a resin material is filled in a part of the internal space of the fixing member 18. .

The solar cell module 210 includes a resin material 42 in a space between the back member 26 and the fixing member 18. The resin material 42 encloses at least a part of the lead wiring 22b drawn from the through hole 26a of the back member 26. Thereby, deterioration of the lead-out wiring 22b which is a conduction | electrical_connection part and penetration | invasion of the water | moisture content from the through-hole 26a to the inside of the solar cell module 210 can be suppressed more.

Specifically, the fixing member 18 is bonded to the back surface member 26, the lead-out wiring 22 b of the interconnector 22 and the output terminal 40 are electrically connected, and then the silicone and butyl rubber are opened from the openings at both ends of the fixing member 18. A resin material 42 such as is encapsulated. As a result, the energized portion from the through hole 26 a to the output terminal 40 is embedded with the resin material 42.

(Fourth embodiment)
FIG. 12 is an exploded perspective view of the solar cell module according to the fourth embodiment. 13 is a cross-sectional view taken along the line CC in the vicinity of the fixing member shown in FIG. The solar cell module 310 according to the present embodiment is largely different from the solar cell module 10 according to the first embodiment in that the opening of the fixing member 18 is closed.

The fixing member 18 of the solar cell module 310 has a plate material 44 made of the same material as the fixing member 18 (for example, a galvanized steel plate) welded to the opening side portion 18f. Therefore, the fixing member 18 has a shape in which a closed space is formed between the fixing member 18 and the back surface member 26. Thereby, the penetration | invasion of the water | moisture content to the solar cell module 310 inside can be suppressed more. Further, the torsional strength of the fixing member 18 is improved, and the rigidity of the entire solar cell module 310 is increased.

In the present specification, “rigidity” indicates the degree of deformation when an external force is applied to the solar cell module, and “high rigidity” is a state in which deformation is difficult when the same external force is applied. Say. More specifically, it refers to a state in which various “strengths” such as compressive strength, tensile strength, and torsional strength are high.

As described above, the solar cell module 10 (110, 210, 310) according to the present embodiment is provided so as to face the translucent member 16 disposed on the light receiving side and the translucent member 16. A back surface member 26; a photovoltaic device 12 provided between the translucent member 16 and the back surface member 26; an interconnector 22 that outputs electrical energy generated by the photovoltaic device 12 to the outside; And a fixing member 18 (118) provided on the surface of the member 26.

The translucent member 16 has an incident portion 16d where light enters from the outside at the outer edge of the light receiving surface 16a, and the back surface member 26 has a through hole 26a through which a lead-out wiring 22b which is a part of the interconnector 22 passes. Is formed. The fixing member 18 is provided so as to cover the through hole 26a while a space is formed between the fixing member 18 and the through hole 26a. The fixing member 18 has an output terminal 40 for outputting the electric energy generated in the photovoltaic device 12 to the outside fixed, and the lead-out wiring 22b is connected to the output terminal 40.

Thereby, the fixing member 18 can also serve as a connection box. Further, the fixing member 18 suppresses intrusion of moisture and the like from the through hole 26a provided in the back surface member 26 in order to take out the photovoltaic power to the outside. Further, the falling off due to the external force applied to the fixing member 18 is prevented. Further, the fixing member 18 enables cost reduction of the solar cell module by reducing the number of parts.

Moreover, since the photovoltaic apparatus 12 is pinched | interposed into two glass plates when the solar cell module 10 which concerns on this Embodiment uses a glass plate for the translucent member 16 or the back surface member 26, intensity | strength is high. Become. Therefore, in such a case, it is not necessary to provide a frame for improving the strength. As a result, the translucent member 16 has an incident portion 16d on the outer edge of the light receiving surface 16a where light enters from the outside. Thereby, compared with the case where there exists a flame | frame, much light can be taken in into the photovoltaic apparatus 12 from the outside.

As described above, the present invention has been described with reference to the above-described embodiment. However, the present invention is not limited to the above-described embodiment, and the present invention can be appropriately combined or replaced with the configuration of the embodiment. It is included in the present invention. In addition, it is possible to appropriately change the combination and processing order in the embodiment based on the knowledge of those skilled in the art and to add various modifications such as various design changes to the embodiment. The described embodiments can also be included in the scope of the present invention.

As the filler 24 according to the above-described embodiment, in addition to butyl rubber and ethylene vinyl acetate (EVA), a material used for caulking such as silicone, a filling resin material such as polyvinyl butyral (PVB), ethylene ethyl acrylate copolymer (EEA), and the like An ethylene resin, urethane, acrylic, epoxy resin, or the like may be used.

As the first electrode layer 30 according to each of the above-described embodiments, in addition to zinc oxide (ZnO), tin oxide (SnO ₂ ), indium oxide (In ₂ O ₃ ), titanium oxide (TiO ₂ ), zinc stannate (Zn 2 _SnO ₄₎ may be configured by a metal one kind selected from oxides or plural kinds of laminates such. Note that these metal oxides may be doped with fluorine (F), tin (Sn), aluminum (Al), gallium (Ga), niobium (Nb), or the like.

In addition, the solar cell module by the following combinations can also be included in the scope of the present invention.

(1) Solar cell module
A translucent member disposed on the light receiving side;
A back member provided so as to face the translucent member;
A photovoltaic device provided between the translucent member and the back member;
Wiring for outputting the electrical energy generated in the photovoltaic device to the outside;
A fixing member provided on the surface of the back member,
The translucent member has an incident portion on the outer edge of the light receiving surface where light enters from the outside,
The back member has a through hole through which a part of the wiring is passed,
The fixing member has a space between the through hole and is provided so as to cover the through hole, and functions as an attachment portion that is attached to the gantry when the solar cell module is installed. To do. Thereby, the fixing member is also used as a reinforcing member or an attachment member, and it is possible to further reduce the cost by reducing the number of parts.

(2) The solar cell module according to (1), wherein the fixing member is made of a metal material. Thereby, the fixing member which raises the rigidity of a solar cell module can be manufactured cheaply and simply.

(3) The fixing member has an output terminal for outputting electric energy generated by the photovoltaic device to the outside fixed, and the wiring is connected to the output terminal (1) ) Or the solar cell module described in (2). Thereby, the force applied from the outside via the output terminal is dispersed to the fixing member, and is prevented from being applied to the wiring.

(4) A resin material filled in a space between the fixing member and the through hole is further provided, and the resin material encloses a part of the wiring drawn from the through hole. (1) thru | or the solar cell module of any one of (3) characterized by these. Thereby, deterioration of the wiring which is a conduction | electrical_connection part, and the penetration | invasion of the water | moisture content from a through-hole to the inside of a solar cell module can be suppressed more.

(5) The sun according to any one of (1) to (4), wherein the fixing member has a shape in which a closed space is formed between the fixing member and the back surface member. It may be a battery module. Thereby, the penetration | invasion of the water | moisture content inside a solar cell module can be suppressed more.

10 solar cell module, 12 photovoltaic device, 16 translucent member, 16a light receiving surface, 16d incident part, 18 fixed member, 18a space, 18b covering part, 18c side surface, 18d flange part, 18e hole, 18f opening side part , 22 interconnector, 22a conducting part, 22b wiring, 24 filler, 24a through hole, 26 back member, 26a through hole, 28 photovoltaic element, 40 output terminal, 42 resin material, 44 plate material.

The present invention can be used for solar cells.

Claims

A translucent member disposed on the light receiving side;
A back member provided so as to face the translucent member;
A photovoltaic device provided between the translucent member and the back member;
Wiring for outputting the electrical energy generated in the photovoltaic device to the outside;
A fixing member provided on the surface of the back member,
The translucent member has an incident portion on the outer edge of the light receiving surface where light enters from the outside,
The back member has a through hole through which a part of the wiring is passed,
The fixing member has a space between the through hole and is provided so as to cover the through hole, and functions as an attachment portion that is attached to the gantry when the solar cell module is installed. A solar cell module characterized by:
The solar cell module according to claim 1, wherein the fixing member is made of a metal material.
The fixing member has an output terminal for outputting electric energy generated by the photovoltaic device to the outside, and is fixed.
The solar cell module according to claim 1, wherein the wiring is connected to the output terminal.
A resin material filled in a space between the fixing member and the through hole;
The solar cell module according to any one of claims 1 to 3, wherein the resin material encloses a part of the wiring drawn out from the through hole.
The solar cell module according to any one of claims 1 to 4, wherein the fixing member has a shape in which a closed space is formed between the fixing member and the back surface member.