JP3437027B2 - Solar cell module - Google Patents

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 installed on a roof of a house, a side surface of a building, a rooftop, a solar power plant or the like.

[0002]

2. Description of the Related Art Most solar cell modules have a structure called a super straight type. FIG. 5 is an example of a general solar battery cell arrangement, FIG. 6 is a perspective view for explaining the configuration of a solar battery module, and FIG. 7 is a perspective view showing an example of its structure. 8 is a sectional view taken along line BB 'in FIG.

FIG. 5 shows a solar battery portion of a conventional super straight type solar battery module. In FIG. 5, a plurality of solar battery cells 50 are connected to an interconnector 5.
1 and the bus bars 52 that are horizontally connected to each other constitute a solar battery cell array 53 arranged in series or in parallel.
Further, 54 is a conductor for taking out the current of the solar cell module.

Next, FIG. 6 shows a method of assembling a conventional super straight type solar cell module. As shown in the figure, the solar battery cell array 53 includes a front cover 55 such as a white tempered glass plate arranged on the light receiving surface side of the solar battery module and a filler 5 made of transparent resin.
6 is disposed on the front surface of the solar cell, and on the rear surface of the solar cell, a filler 56 made of a transparent resin and a weather resistant film 57 on the back surface are sandwiched in a laminated manner, and the outer periphery of the laminated structure is made of aluminum. It has a structure in which it is supported by a long side frame member 58 and a short side frame member 59 made of the same material. Generally, the long-side frame member 58 and the short-side frame member 59 are fixed with an assembly screw 60. The long side frame member 58 or the short side frame member 59 is provided with a plurality of mount fixing screw holes 61.

FIG. 7 is a perspective view showing an example of a solar cell module structure having a structure called a super straight type. In the figure, 50 is a plurality of solar cells, 56
Is a filler made of transparent resin, 55 is a front cover such as a white tempered glass plate, 58 is a long side frame member made of aluminum or the like, 59 is a short side frame member made of aluminum or the like, 6
Reference numeral 0 is an assembly screw, and 61 is a mount fixing screw hole. An output terminal protection cover 62 and a solar cell output cable 64 are arranged on the back surface of the solar power module.

FIG. 8 is a sectional view taken along line BB 'in FIG. In the figure, from the top, a front cover 55 such as white plate tempered glass, a filling material 56 made of transparent resin, a solar cell array 53, a filling material 56 made of transparent resin, and a weather resistant film 57 on the back surface are laminated in this order. It is sandwiched in a shape. Then, the end portion 65 of this laminate and the long-side frame member 58
A cushioning material 66 is disposed between (or the short side frame member 59), and the cushioning material 66 has a function of cushioning an external load on the front cover 55 such as white plate tempered glass, and It also has a function of suppressing intrusion of water from the outside and an electrical insulating function of the long-side frame member 58 (or the short-side frame member 59) and the weather resistant film 57.

FIG. 9 is a sectional view of the vicinity of the output terminal protection cover 62 provided on the back surface of the solar-electrical module shown in FIG. An output take-out hole 67 is provided inside the output terminal protection cover 62, and the conductor 54 for taking out the current of the solar cell module is relayed from this hole by a terminal relay plate 68 or the like, and a solar cell output cable 64 (not shown). It is connected to the.

The structure of the weather resistant film 57 on the back surface described with reference to FIGS. 6, 7 and 8 is a weather resistant film (electrical insulator) / metal foil such as aluminum (electrical conductor) / weather resistant film. It has a sandwich structure of (electrical insulator). The electrical insulation between the weather resistant film 57 and the conductor 54 is generally performed only by the filler 56. Further, there is also a structure in which an insulating film 69 is sandwiched between the filler 56 and the solar cell 50 in order to increase the withstand voltage between the solar cell 50 and the conductor 54.

[0009]

However, the aluminum foil disposed in the intermediate layer of the weather resistant film 57 may come into contact with the conductor 54 due to a deviation in assembling the filler 56 and the weather resistant film 57, and The problem that an electrical insulation failure occurs because the filler 56 moves inside when the solar cells are laminated, and there is no sufficient gap between the filler 56 and the weather resistant film 57 and the conductor 54. was there.

Further, when laminating the solar cell module, the filler 56 and the insulating film 69 sandwiched in order to increase the withstand voltage between the solar cell 50 and the conductor 54 increase the thickness of the laminated layers of the module. There was a problem that the time would be long.

Further, a bus bar 52 for horizontal connection.
However, there is a problem that the busbars 52 come into contact with each other due to heat shrinkage of the filler 56 during lamination, so that the busbars 52 are electrically connected and short-circuited.

The present invention has been made to solve the above problems, and it is an object of the present invention to provide a solar cell module having a structure capable of improving the insulation between conductors by providing the conductor with an insulator. To aim.

[0013]

Means for Solving the Problems The present invention has been made to solve the problem that described above with reference to Lee centers connector to connect a plurality of solar cells in series, the single column Multiple strings arranged in parallel and arranged in parallel, and a conductor for extracting the current of the solar cell module.
A body , a first bus bar that electrically connects an interconnector at one string end and an interconnector at another string end, an interconnector at one string end, and a current of the solar cell module Take out
A second bus bar for electrically connecting a conductor for connecting
At least, and the first and second bus bars are covered with an electrically insulating film . At this time, in order to extract the current of the solar cell module,
The conductor preferably has its outer periphery partially covered with an electrically insulating film . Further, the first busbar and the second busbar may be partially overlapped with each other in the solar cell surface direction. further,
It is preferable that the electrically insulating film is made of a material containing a polyimide resin.

[0014]

[0015]

1 to 4 are views showing an embodiment of the present invention. FIG. 4 is a perspective view of a solar cell module having a structure called a superstrate system according to an embodiment of the present invention. In the figure, 1 is a front cover such as a white tempered glass plate, 2 is a filler made of transparent resin, 3 is a plurality of solar cells, 5 is a long side frame made of aluminum or the like, and 6 is made of aluminum or the like. Is a short side frame member, 7 is an assembly screw, and 8 is a pedestal fixing screw hole. The output terminal protection cover 9 and the solar cell output cable 10 are arranged on the back surface of the solar power module.

FIG. 3 is a sectional view of the vicinity of the output terminal protection cover 9 provided on the back surface of the solar power module. In the same figure, from the bottom, a front cover 1 such as white plate tempered glass, a filler 2 made of transparent resin, a plurality of solar cells 3, a filler 2 made of transparent resin, and a weather resistant film 4 on the back side are arranged in this order. It is sandwiched in layers.

An output take-out hole 11 is provided inside the output terminal protection cover 9 and is relayed by a conductor 12 terminal relay plate 14 or the like for taking out the current of the solar cell module from this hole, and a solar cell output cable 10 (not shown). )It is connected to the.

An electrical insulator 13 is provided on the outer circumference of the conductor 12 for taking out the current of the solar cell module.
Are arranged. The insulator 13 has an electrically insulating function. The material of the conductor 12 is mainly copper, the outer periphery of which is solder-dip coated, and the shape is about 4 to 6 mm in width and about 0.10 to 0.3 mm in thickness. The insulator 13 is formed by laminating an insulating film such as polyimide on the outer periphery of the conductor 12 or coating a resin such as polyimide. As the insulating resin material, in addition to polyimide or the like, trifluoride-based resin material, vinyl chloride-based resin material, polyester film or the like can be used. The region in which the insulator 13 is disposed includes at least a portion that may be in contact with the end surface of the metal foil such as aluminum, and as shown in FIG. 3, at least the terminal relay plate 14 and the solar battery cell 3 It is placed between and.

FIG. 1 shows an example of another embodiment of the present invention. The solar cell module in FIG.
A structure in which an electrical insulator 13 is provided on an outer peripheral portion of a conductor 12 that electrically connects between a plurality of solar battery cells 3 and a solar battery output cable 10 for extracting a current of a solar battery module, The structure prevents the first bus bars that connect the strings of the solar cell module from contacting each other. A string of solar cell modules is one row in which solar cells are connected in series (9 series, etc.) by an interconnector or the like.

The conductor 12 shown in the center of FIG. 1 (a) is located at the end of the string as shown in the drawing.
The conductor 12 is connected to the bus bar 15 that horizontally connects the solar cells (in this way, the bus bar to which the conductor 12 is connected is
2nd busbar) , so there is only one 2nd busbar 15.
Connect the interconnector at the end of the string to the conductor 12.
To connect to each other. The second bus bar 15 is arranged around the plurality of solar battery cells 3. Figure 1
As shown in (a), the conductor 12 is arranged so as to extend to the surface regions of the plurality of solar cells 3,
An electrical insulator 13 is disposed on the outer peripheral portion of the, and an electrical insulator 13a is also disposed on the outer peripheral portion of the bus bar 15. In order to obtain the electrical insulator 13a arranged on the outer peripheral portion of the bus bar 15, the bus bar 15 is obtained by laminating an insulating film such as polyimide, or by coating an insulating resin such as polyimide.

FIG. 1 (b) is a sectional view taken along the line AA 'in FIG. 1 (a). Interconnectors 16 are arranged on the upper and lower outer sides of the plurality of solar battery cells 3, respectively. The lower interconnector 16 is the lower bus bar 15
Electrically connected to. The upper interconnector 16 is electrically connected to the upper bus bar 15. An electrical insulator 1 is provided on the outer peripheral portion of the upper bus bar 15.
3a is arranged. As shown in FIG. 1 (b),
Electrically, the upper bus bar 15 and the lower side of the bus bar 15
An electrical insulator 13a is interposed between and to prevent electrical contact or short circuit.

FIG. 2 is a view of the solar battery portion of the solar-electrical module according to one embodiment of the present invention, which is a layout view of the solar battery cells of the solar battery module to which FIG. 1 (a) is applied. On the right side of the figure, a structure including an insulator 13 covering the conductor 12 and an insulator 13a covering the bus bar 15 described in FIG. 2A is shown, and on the left side, an insulator 13a covering the bus bar 15 is shown. The structure with is shown. Reference numeral 3 is a solar battery cell, and 16 is an interconnector for collecting a current of the solar battery cell. In this solar cell module, a bus bar whose surface has an insulating function by an insulator is used for a bus bar that connects solar cells horizontally.

The structure of the weather resistant film 4 on the back surface described in FIGS. 1, 2 and 3 is as follows: weather resistant film (electrical insulator) / metal foil such as aluminum (electrical conductor) / weather resistant film. Although it has a sandwich structure of (electrical insulator), the outer peripheral portion of the conductor 12 is electrically insulated
By coating with 3, the weather resistant film 4 and the conductor 12 can be prevented from making electrical contact or short-circuiting.

When laminating the solar cell module,
Since only the filler 2 is sandwiched in order to increase the withstand voltage between the plurality of solar cells 3 and the conductor 12, for example, when EVA material is used, the lamination time ( It is possible to shorten about 20 to 30 minutes from the conventional one).

[0025]

As described above, according to the solar battery module of the present invention , the surface of the conductor for taking out the electric current of the solar battery cell is covered with an electrical insulator, so that it may come into contact with other conductors. It is possible to obtain a highly reliable solar cell module without causing insulation failure or conduction failure with a mounting member of the solar cell module.

According to the solar cell module of the present invention, the electrical insulation on the surface of the bus bar to the cross-tie solar cell
Since the film is covered, electrical contact between the busbars from the solar battery cells can be prevented, and a highly reliable solar battery module can be obtained.

According to the solar-electricity module of the present invention, the electrical insulator covering the conductor is made of a material containing a polyimide resin, which has high electrical insulation and high productivity. Can be made easily.

[Brief description of drawings]

1A and 1B are views for explaining a solar cell module according to an embodiment of the present invention, in which FIG. 1A is a plan view of a solar cell portion, and FIG. 1B is a sectional view taken along line AA ′ of FIG. Is.

FIG. 2 is a diagram for explaining a solar cell module according to an embodiment of the present invention, and is a plan view of a solar cell unit.

FIG. 3 is a sectional view of the vicinity of the output terminal protection cover provided on the back surface of the solar cell module according to the embodiment of the present invention.

FIG. 4 is a perspective view of a solar cell module having a structure called a superstrate system according to an embodiment of the present invention.

FIG. 5 is a general solar cell array diagram of a solar cell portion of a conventional super straight type solar cell module.

FIG. 6 is a perspective view for explaining a method for assembling a conventional super straight type solar cell module.

FIG. 7 is a perspective view of a solar cell module having a structure called a conventional super straight type.

8 is a sectional view taken along line BB ′ in FIG. 7 showing a conventional example.

FIG. 9 is a cross-sectional view of the vicinity of an output terminal protection cover provided on the back surface of a solar cell module having a structure called a conventional super straight type.

[Explanation of symbols]

1 Front cover such as white plate tempered glass plate 2 Filler made of transparent resin 3 Multiple solar cells 4 Weatherproof film on the back 5 Long-side frame material made of aluminum, etc. 6 Short-side frame material made of aluminum, etc. 7 Assembly screw 8 Screw holes for fixing the base 9 Output terminal protection cover 10 solar cell output cable 11 Output take-out hole 12 Conductor for taking out current of solar cell module 13 Electrical insulator on outer periphery of conductor 12 13a Insulator covering the bus bar 15 14 terminal relay board 15 bus bars 16 interconnector

─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) H01L 31/04-31/078 E04D 13/18

Claims (4)

(57) [Claims] 1. An interconnector is used to connect a plurality of solar cells in series and to arrange them in one row.
A first string for electrically connecting a plurality of strings arranged in parallel, a conductor for taking out a current of the solar cell module, an interconnector at one string end, and an interconnector at another string end Busbar, one string end interconnector, the sun
A second bus bar for electrically connecting a conductor for taking out a current of the battery module; and a sun characterized in that the first and second bus bars are covered with an electrically insulating film. Battery module. 2. Extracting the current of the solar cell module
Conductor Sutame is partially electrically insulating the outer circumference Fi
The solar cell module according to claim 1 , wherein the solar cell module is covered with rum . And wherein the first bus bar, and the second bus bar, the solar cell surface direction, partially, superimposed claim 1, characterized in that are or sun according to 2 Battery module. 4. A solar cell module according to any one of claims 1 to 3, characterized in that said electrical insulation film is made of a material containing polyimide resin.