JP6501072B2 - Solar cell system - Google Patents

Description

  The present invention relates to a solar cell system.

  Generally, the output per solar cell is about several watts. For this reason, when using a solar cell as power supplies, such as a house or a building, the solar cell module which raised the output by connecting a several solar cell is used. In order to improve the weather resistance and impact resistance of this solar cell module, a plurality of solar cells are disposed between the protective members and sealed with a filler mainly composed of ethylene vinyl acetate copolymer (EVA) or the like. (See Patent Document 1).

Japanese Patent Application Laid-Open No. 11-270085

  Usually, such a solar cell module fixes a plurality of solar cell modules using a frame integrated with a mounting stand, and is installed as a solar cell system. Generally, since the terminal box and cable wiring which take out the electric power which the solar cell module generated are provided in any one surface side of a solar cell module, the appearance where they are attached may become unattractive.

  The present invention has been made in view of these circumstances, and an object thereof is to provide a technique for easily shielding the power output portion of a double-sided power generation type solar cell module.

In order to solve the above problems, a solar cell system according to an aspect of the present invention includes a double-sided power generation type solar cell module having a first surface and a second surface opposite to the first surface, and a solar cell module comprising a frame for mounting a solar cell module includes a solar cell, a first protective member disposed on the first surface side of the solar cell, the second protective member disposed on the second surface side of the solar cell And a terminal box disposed on the first surface side of the first protective member for extracting power generated by the solar cell, and a cable connected to the terminal box, the first protective member and the second protective member Has translucency, and the solar cell module is mounted on a rack with the first surface facing the rack side, and the rack is a first rack for fixing one side of the solar cell module, and the solar cell module Fix the other side opposite to one side of And a second frame, and the first frame and the second frame spaced apart, the first frame may have a housing section for accommodating the terminal box and the cable, from the first surface side and a second surface Generate electricity from the incident sunlight.
Another aspect of the present invention is also a solar cell system. The solar cell system includes a double-sided power generation type solar cell module having a first surface and a second surface opposite to the first surface, and a mount on which the solar cell module is mounted. , A solar cell, a first protective member disposed on the first surface side of the solar cell, a second protective member disposed on the second surface side of the solar cell, and the first protective member disposed on the first surface side A terminal box for extracting power generated by the solar cell, and a cable connected to the terminal box, the first protective member and the second protective member have translucency, and the solar cell module The first surface is placed on the gantry with the first surface facing the gantry, the gantry is formed using an aluminum alloy, and the gantry has a storage section for storing the terminal box and the cable, and the first surface is It generates electricity by the sunlight which enters from the 2nd surface side.

  ADVANTAGE OF THE INVENTION According to this invention, the technique which shields the electric power output part of a double-sided power generation type solar cell module simply can be provided.

It is sectional drawing of a solar cell module. It is the perspective view which looked at a solar cell module from the back side. Fig.3 (a) is the perspective view which looked at the mount frame from the surface side. FIG.3 (b) is an A-A 'cross section figure of Fig.3 (a). It is the perspective view which looked at the solar cell system at the time of arranging a mount in the horizontal direction from the surface side. It is A-A 'sectional drawing of FIG. FIGS. 6 (a) to 6 (c) are views showing water draining holes provided in the gantry, and are cross-sectional views in the width direction of the gantry. It is the perspective view which looked at the solar cell system at the time of arranging a mount in the perpendicular direction from the surface side.

  Embodiments of the present invention will be described with reference to the drawings. The same or corresponding portions in the drawings are denoted by the same reference numerals, and the description thereof will not be repeated to avoid the repetition of the description. However, it should be noted that the drawings are schematic, and the ratio of each dimension is different from the actual one. Therefore, specific dimensions and the like should be determined in consideration of the following description. In addition, there may be a case where the dimensional relationships and proportions differ between the drawings.

(Schematic configuration of solar cell module)
The schematic configuration of a solar cell module 10 according to an embodiment of the present invention will be described with reference to FIGS. 1 and 2. FIG. 1 is a cross-sectional view of a solar cell module 10. FIG. 2 is a perspective view of the solar cell module 10 as viewed from the back side.

  The solar cell module 10 includes a solar cell 11, a first protective member 12, a second protective member 13, a sealing member 14, and a terminal box 40. Between the first protective member 12 and the second protective member 13, the plurality of solar cells 11 are sealed by the sealing member 14.

  It is preferable that the solar cell module 10 be a double-sided power generation type that generates electric power by sunlight incident on the front and back surfaces. Here, the front surface is a surface on which sunlight is mainly incident, and the back surface is a surface on the opposite side. When a double-sided power generation type solar cell module is used as the solar cell module 10, power can be generated not only on the roof surface of a bicycle parking lot or a parking lot but also on a wall surface such as a building or a fence.

  The solar cell 11 includes a photoelectric conversion unit that generates a carrier by receiving sunlight. In the photoelectric conversion portion, a front surface electrode is formed on the front surface, and a back surface electrode is formed on the back surface. In addition, the structure of the solar cell 11 is not specifically limited, For example, the structure in which the electrode was formed only on the back surface of a photoelectric conversion part may be sufficient.

  The photoelectric conversion portion includes, for example, a semiconductor substrate such as crystalline silicon (c-Si), gallium arsenide (GaAs), indium phosphide (InP), an amorphous semiconductor layer formed on the substrate, and an amorphous semiconductor. And a transparent conductive layer formed on the layer. As a specific example, an i-type amorphous silicon layer, a p-type amorphous silicon layer, and a transparent conductive layer are sequentially formed on the light receiving surface of an n-type single crystal silicon substrate, and i-type amorphous silicon is formed on the back surface. The structure which formed the layer, the n-type amorphous silicon layer, and the transparent conductive layer in order is mentioned. The transparent conductive layer is preferably made of a transparent conductive oxide obtained by doping tin (Sn), antimony (Sb) or the like with a metal oxide such as indium oxide (In 2 O 3) or zinc oxide (ZnO).

  Adjacent solar cells 11 are electrically connected by a wiring member 16. Specifically, the wiring member 16 is connected to the surface electrode of one solar cell 11 and the back surface electrode of the other solar cell 11 among the adjacent solar cells 11. Thus, the adjacent solar cells 11 are electrically connected in series.

  The connection between the solar cell 11 and the wiring member 16 is connected using a solder or a resin adhesive. When using a resin adhesive, the resin adhesive is disposed between the wiring member 16 and the solar cell 11, and the solar cell 11 and the wiring member 16 are connected via the resin adhesive. As a resin adhesive, for example, a resin adhesive, a conductive adhesive film in which conductive particles are dispersed in a resin adhesive, or the like is used.

  The first protective member 12 is a member disposed on the surface side of the solar cell 11. The first protective member 12 has a rectangular shape, and for example, a translucent member such as a glass substrate, a resin substrate, or a resin film can be used. Among these, a glass substrate is preferable from the viewpoint of fire resistance, durability, and the like.

  The second protective member 13 is a member disposed on the back surface side of the solar cell 11. The second protective member 13 has a rectangular shape, and in the case of assuming incidence of light from the back surface side, the same member as the first protective member 12 or a sheet having translucency can be used. Moreover, when not assuming the incidence of light from the back side, it is also possible to use a member having no translucency. In the present embodiment, both the first protection member 12 and the second protection member 13 use a glass substrate having translucency. The second protective member 13 is designed to have a shorter length in the longitudinal direction than the first protective member 12. The other dimensions of the first protective member 12 and the second protective member 13 are the same. Therefore, when the end of one short side of the first protective member 12 and the end of the short side of the second protective member 13 coincide with each other, the end of the other short side does not coincide with each other and shifts by the distance H.

  The sealing member 14 seals the solar cell 11 between the first protective member 12 and the second protective member 13. As the sealing member 14, a translucent resin such as EVA, EEA, PVB, silicon, urethane, acrylic, epoxy, or polyolefin can be used. In the present embodiment, EVA resin is used.

  The terminal box 40 is a member for housing the output wiring 20 for taking out the power generated by the solar cell 11 to the outside. One end of the output wiring 20 is connected to the wiring member 16, and the other end is connected to the terminal of the terminal box 40. The output wiring 20 is drawn out of the solar cell module 10 from the distance H between the first protective member 12 and the second protective member 13. The output wiring 20 is usually soldered to a wiring member 16 by cutting a copper foil having a thickness of about 0.1 mm to 0.3 mm and a width of 6 mm by solder coating the entire surface into a predetermined length. Further, the surface of the output wiring 20 is covered with an insulating film.

  The terminal box 40 is attached near the short side of the solar cell module 10 from which the output wiring 20 is drawn. Specifically, the terminal box 40 is a rectangular solid, and is attached by silicon resin 15 or the like so that the longitudinal direction thereof is parallel to the short side of the solar cell module 10. From both ends in the longitudinal direction of the terminal box 40, cables 42 connected to the terminals of the terminal box 40 are drawn out.

(Solar cell system)
Next, the configuration of the solar cell system 100 will be described. The solar cell system 100 is configured by fixing a plurality of solar cell modules 10 on a mount 50.

  First, the configuration of the gantry 50 will be described with reference to FIG. Fig.3 (a) is the perspective view which looked at the mount frame 50 from the surface side. FIG.3 (b) is an A-A 'cross section figure of Fig.3 (a).

  The gantry 50 is a cylindrical member having a longitudinal direction, and a concave storage portion 54 extending in the longitudinal direction is formed on the mounting surface 52 on which the solar cell module 10 is mounted. That is, the cross section in the direction perpendicular to the longitudinal direction of the gantry 50 has a shape in which a part of one side of the rectangle is recessed. The housing portion 54 is designed such that its width (length in the direction perpendicular to the longitudinal direction) is larger than the width of the terminal box 40 and its depth is larger than the thickness of the terminal box 40. The gantry 50 is formed using, for example, an aluminum alloy.

  The solar cell system 100 can be configured by arranging a plurality of mounts 50 in parallel in a horizontal direction or a direction perpendicular to the horizontal direction, and fixing a plurality of solar cell modules 10 on the mount 50.

  Hereinafter, the configuration of the solar cell system 100 when the gantry 50 is arranged in the horizontal direction will be described with reference to FIGS. 4 and 5. FIG. 4 is a perspective view of the solar cell system 100 when the gantry 50 is arranged in the horizontal direction as viewed from the front side. FIG. 5 is a cross-sectional view taken along the line A-A 'of FIG. In FIG. 4 and FIG. 5, the solar cell module 10 located on the vertically upper side is referred to as a code 10 a, and the solar cell module 10 located on the vertically lower side is referred to as a code 10 b. Similarly, the gantry 50 located on the vertically upper side is referred to as a symbol 50a, and the gantry 50 located on the vertically lower side is referred to as a symbol 50a.

  The solar cell system 100 includes a plurality of gantry 50, a plurality of solar cell modules 10, a first fixing member 60, and a second fixing member 62. The plurality of gantry 50 are arranged in parallel in the horizontal direction.

  The plurality of solar cell modules 10 are arranged such that the back side faces the mounting surface 52 of the gantry 50. Specifically, the short side portion on the side where the terminal box 40 of the solar cell module 10a is provided is disposed on the gantry 50a. The other short side portion of the solar cell module 10a is disposed on the gantry 50b. Moreover, the short side part by which the terminal box 40 of the solar cell module 10b is provided is also arrange | positioned on the mount frame 50b. Thus, in the solar cell modules 10a and 10b whose short sides are adjacent to each other, the adjacent short side portions are arranged on one gantry 50b. The terminal box 40 and the cable 42 are housed in the housing portion 54 of the gantry 50.

  The first fixing member 60 and the second fixing member 62 are members for fixing the solar cell module 10 to the mount 50. The first fixing member 60 is a member for fixing the solar cell module 10 to the gantry 50 at the end portion on the vertical upper side or the vertical lower side of the solar cell system 100. The second fixing member 62 is a member for fixing two adjacent solar cell modules 10 together to the gantry 50 in the central portion of the solar cell system 100.

  Two first fixing members 60 are provided for each solar cell module 10 in order to fix both end portions of the short side. As shown in FIG. 5, the first fixing member 60 is bent from the surface to the side of the solar cell module 10a, and is bent from the side of the solar cell module 10a to the mounting surface 52 of the gantry 50a. It is bent from the mounting surface 52 toward the side. The first fixing member 60 is fixed to the gantry 50a by a bolt 64 at a portion disposed on the mounting surface 52 of the gantry 50a. Thereby, the solar cell module 10a is fixed to the mount 50a.

  The second fixing members 62 are provided two by two for fixing the both end portions of the short side to each of the solar cell modules 10 whose short sides are adjacent to each other. As shown in FIG. 5, the second fixing member 62 is bent from the surface to the side of the solar cell module 10a, and is bent from the side of the solar cell module 10a to the mounting surface 52 of the gantry 50b. It is bent toward the side surface of the solar cell module 10b from the mounting surface 52, and is bent toward the surface from the side surface of the solar cell module 10b. The second fixing member 62 is fixed to the gantry 50b by a bolt 64 at a portion disposed on the mounting surface 52 of the gantry 50b. Thereby, the solar cell modules 10a, b are fixed to the mount 50b.

  The mounts 50 a and 50 b have different areas of the mounting surface 52. The area of the mounting surface 52 of the gantry 50b is larger than the area of the mounting surface 52 of the gantry 50a. This is because the gantry 50a needs to be able to mount only the vertical upper end of the solar cell module 10a, whereas the gantry 50b mounts both the vertical lower end of the solar battery module 10a and the vertical upper end of the solar battery module 10b. Because it is necessary. Thereby, since the solar cell module 10 is supported by the gantry 50 at the vertical upper end portion and the vertical lower end portion, the solar cell module 10 can be stably fixed to the gantry 50.

  Since the solar cell system 100 shown in FIGS. 4 and 5 is generally installed outdoors, water derived from rain water or the like enters the storage portion 54 of the gantry 50 from the gap of the solar cell module 10 There is a case. Therefore, the gantry 50 preferably includes a drain hole 56 for draining water from the storage unit 54. 6 (a) to 6 (c) are views showing the water draining holes 56 provided in the gantry 50, and are cross-sectional views in the width direction of the gantry 50. FIG.

  For example, when the solar cell system 100 is installed on the roof of a bicycle parking lot or a parking lot, the solar cell system 100 is substantially horizontal to the ground. On the other hand, when installed on a wall surface, the solar cell system 100 is substantially perpendicular to the ground. Therefore, the gantry 50 is provided with the water drain hole 56 so as to be vertically downward when the solar cell system 100 is installed.

  For example, when installing the solar cell system 100 on a wall surface, as shown to Fig.6 (a), the opening part of the accommodating part 54 will turn to a horizontal direction. In this case, by providing the drainage hole 56 in the vertical downward direction from the wall surface of the storage portion 54, the water present in the storage portion 54 can be easily drained.

  Moreover, when installing the solar cell system 100 on a roof surface, as shown in FIG.6 (b), the accommodating part 54 opens vertically upward. In this case, by providing the water draining hole 56 in the vertical downward direction from the bottom surface of the storage portion 54, the water present in the storage portion 54 can be easily discharged.

  As shown in FIG. 6C, the drainage hole 56 may be provided obliquely downward from the corner where the bottom surface of the storage portion 54 and the wall surface contact. In this case, even if the storage portion 54 opens in the horizontal direction or vertically upward, the drainage hole 56 penetrates obliquely downward from the storage portion 54. Therefore, in either case, the water present in the storage unit 54 can be discharged.

  FIG. 7 is a perspective view of the solar cell system 100 when the gantry 50 is arranged in the vertical direction as viewed from the front side. In the solar cell system 100 in the case where the gantry 50 is arranged in the direction perpendicular to the horizontal direction, as shown in FIG. 7, the orientations of the solar cell module 10 and the gantry 50 of the solar cell system 100 shown in FIG. It is only. Therefore, the method of fixing the solar cell module 10 using the gantry 50, the first fixing member 60 and the second fixing member 62 and the function and effect thereof are the same.

  As mentioned above, the solar cell system 100 of this embodiment is provided with the mount frame 50 in which the storage part 54 which can accommodate the terminal box 40 and the cable 42 of the solar cell module 10 was formed. Thereby, the terminal box 40 and the cable 42 of each solar cell module 10 are stored in the storage portion 54 of the gantry 50 on the back side of the solar cell system 100 and can not be seen from the outside. In addition, it is not necessary to separately fix the cable 42 with a fixing member so as not to be separated. For this reason, the appearance of the back surface side of the solar cell system 100 is improved, and a fixing bracket for fixing the cable 42 is not necessary, which makes it possible to reduce installation time and cost.

  Further, in the gantry 50, the width and the depth of the housing portion 54 are designed to be larger than the width and the thickness of the terminal box 40. Therefore, the terminal box 40 and the cable 42 can be completely housed in the housing portion 54, and the appearance of the back surface side of the solar cell system 100 is further improved. Furthermore, the back surface of the solar cell module 10 can be brought into contact with the mounting surface 52 of the gantry 50, and the solar cell module 10 can be stably fixed to the gantry 50.

  Further, the first fixing member 60 and the second fixing member 62 fix the solar cell module 10 to the mount 50 by attaching bolts 64 on the mount 50. Thus, the solar cell module 10 can be fixed to the mount 50 without providing the solar cell module 10 with a hole for passing the bolt 64.

  In addition, the terminal box 40 is attached to the back side of the solar cell module 10 near the short side. Thereby, the sunlight which injects into the surface side of the solar cell module 10 is not shielded by the terminal box 40. FIG. Moreover, it can suppress that the sunlight which injects into the back surface side of the solar cell module 10 is interrupted | blocked by the terminal box 40. FIG.

  The present invention has been described above based on the embodiments. It is understood by those skilled in the art that this embodiment is an exemplification, and that various modifications can be made to the combination of each component and each processing process, and such a modification is also within the scope of the present invention. is there.

  In the above description, the solar cell module 10 has been described on the premise that the solar cell module 10 generates electric power from the solar light incident on the front and back surfaces, but the solar cell module 10 is a single-sided solar cell module that generates electric power on one side. The invention is valid.

  DESCRIPTION OF SYMBOLS 10 solar cell module, 11 solar cell, 12 1st protection member, 13 2nd protection member, 14 sealing member, 16 wiring member, 20 output wiring, 30 sealing film, 40 terminal box, 42 cables, 50 mounts, 52 Mounting surface, 54 storage units, 56 water drainage holes, 60 first fixing member, 62 second fixing member, 64 volts, 100 solar cell system.

  The present invention is applicable to a solar cell system.

Claims (5)

A double-sided power generation type solar cell module having a first surface and a second surface opposite to the first surface;
And a frame for mounting the solar cell module,
The solar cell module is
With solar cells,
A first protection member disposed on the first surface side of the solar cell;
A second protection member disposed on the second surface side of the solar cell;
A terminal box disposed on the first surface side of the first protective member and for extracting power generated by the solar cell;
And a cable connected to the terminal box,
The first protective member and the second protective member are translucent.
The solar cell module is mounted on the gantry with the first surface facing the gantry,
The mount is
A first mount fixing the one side portion of the solar cell module;
And a second mount fixing the other side portion facing the one side portion of the solar cell module,
Said first frame and said second frame being separated;
It said first cradle can have a housing section for housing said said terminal box cable,
The solar cell system generate | occur | produces with the sunlight which injects from said 1st surface side and said 2nd surface side . The gantry has a mounting surface on which the solar cell module is mounted;
The solar cell system according to claim 1, wherein the storage portion is a recess formed on the mounting surface.   The solar cell system according to claim 2, wherein a part of the first surface of the solar cell module contacts the mounting surface of the gantry.   The solar cell system according to claim 2, wherein the recess is larger than the size of the terminal box. A double-sided power generation type solar cell module having a first surface and a second surface opposite to the first surface;
And a mount on which the solar cell module is mounted,
The solar cell module is
With solar cells,
A first protection member disposed on the first surface side of the solar cell;
A second protection member disposed on the second surface side of the solar cell;
A terminal box disposed on the first surface side of the first protective member and for extracting power generated by the solar cell;
  And a cable connected to the terminal box,
The first protective member and the second protective member are translucent.
The solar cell module is mounted on the gantry with the first surface facing the gantry,
The mount is formed using an aluminum alloy,
  The gantry has a storage unit for storing the terminal box and the cable.
  The solar cell system generate | occur | produces with the sunlight which injects from said 1st surface side and said 2nd surface side.

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