JP3801385B2 - Solar panel structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a solar cell panel structure in which a solar cell module using amorphous silicon (amorphous silicon) is simply panelized.
[0002]
[Prior art]
In general, an amorphous silicon (a-Si) type solar cell is made of a transparent electrode made of SnO on a standard blue plate glass substrate, a power generation film made of p / i / n (or n / i / p) type amorphous silicon, and Al. The back electrode which becomes is the structure which laminated | stacked sequentially.
[0003]
Conventionally, what is shown to FIG. 4 (A) and (B) is known as a solar cell panel structure provided with such an a-Si type solar cell. Here, FIG. 4 (A) shows a sectional view along the rear view, FIG. 5 (B) line X-X shown in FIG. 5 (A) of the same structure.
[0004]
Reference numeral 1 in the drawing denotes a solar cell module in which a power generation film made of amorphous silicon and a back electrode are sequentially formed on a blue glass substrate having a 40 cm square and a thickness of 1.1 mm, for example. Four solar cell modules 1 are arranged and bonded to a tempered glass plate 2 having a 90 cm square and a thickness of 4 mm with a transparent resin layer 3 made of an ethylene-vinyl acetate copolymer or the like to reinforce the light receiving surface. Transparent resin layers 4 and 5 and a waterproof sheet 6 for bonding are formed on the back side of the tempered glass plate 2. The end of the panel including the tempered glass plate 2 is fixed by an annular rubber frame 7.
[0005]
In the solar cell panel structure having such a configuration, the four solar cell modules 1 include a part of the back electrode from the back side of the tempered glass plate 2 as shown in FIGS. 5 (A), (B), and (C). Are bonded by a silver paste 81 at a contact portion with the copper foil tape (copper foil electrode) 8 and are electrically connected to each other. Incidentally, X in FIG. 5 (A) back view of the solar battery panel structure, and FIG. 5 (B) is a partially enlarged view of a main portion P of FIG. 5 (A), FIG. 5 (C) FIG. 5 (B) Sectional drawing which follows a -X line is shown.
[0006]
In addition, as shown in FIG. 6 , such a solar cell panel structure has a lead wire (+ electrode) 10 and a lead wire (−electrode) 11 connected to the copper foil tape 8 of the solar cell module 1. , 11 is caulked with a caulking member 12, and the back side is sealed with a sealant 13 and then used. Reference numeral 14 denotes an annular resin pipe for taking out lead wires provided on the back side of the tempered glass plate 2.
[0007]
[Problems to be solved by the invention]
However, the conventional solar panel structure has the following problems.
(1) A thick tempered glass as in the prior art is expensive.
(2) Since the adhesive transparent resin layers 4 and 5 are used on the back surface side of the tempered glass plate 2, it deteriorates due to moisture.
(3) Since the end portion of the panel including the tempered glass plate 2 is fixed by the annular rubber frame 7, it takes extra construction time.
Thus, according to the conventional solar cell panel structure, the moisture is deteriorated, and the cost is increased in terms of the use of tempered glass and the assembly of the panel.
[0008]
The present invention has been made in consideration of such circumstances, and it is possible to prevent deterioration due to moisture and to reduce the cost by providing a structure in which two inexpensive substrates are superposed and strengthened and the periphery is sealed with a waterproof adhesive resin. It aims at providing the solar cell panel structure which can aim at reduction.
[0009]
[Means for Solving the Problems]
The present invention comprises a back glass substrate and a plurality of solar cell modules in which a transparent electrode, a power generation film, and a back electrode are sequentially formed on a rectangular transparent glass substrate, and at least the back glass substrate One side is a multiple of the size of one side of the transparent glass substrate, and the plurality of solar cell modules are arranged such that the back electrode side thereof becomes the back glass substrate side via an adhesive on the back substrate. The periphery of the plurality of solar cell modules is closed with a waterproof waterproof adhesive, and the gap between the plurality of solar cell modules is closed with a waterproof waterproof adhesive And it is a solar cell panel structure by which an electrode terminal is taken out from the glass substrate side for the back surface.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
In this invention, a rectangular panel can be comprised by combining a solar cell panel structure for 2 modules, for example, and closing the gap | interval between modules with a waterproofing adhesive.
[00 11 ]
In the present invention, examples of the transparent substrate and the back substrate include, but are not limited to, a blue plate glass substrate. In particular, the back substrate disposed on the back side may be a stainless plate, a plastic plate, or the like as long as strength and smoothness can be maintained.
[00 12 ]
【Example】
Embodiments of the present invention will be described below with reference to the drawings.
(Example 1) Reference is made to FIGS. 1A, 1B and 1C. Here, FIG. 1 (A) is a back view of the solar cell panel structure according to Example 1 of the present invention, and FIG. 1 (B) is a cross-sectional view of a main part taken along line XX of FIG. 1 (A). FIG. 1C is a cross-sectional view of a main part of FIG.
[00 13 ]
Reference numeral 21 in the figure indicates a blue plate glass substrate (transparent substrate) having a 40 cm square and a thickness of 2 mm. The main surface of the soda glass substrate 21 includes a transparent electrode 22 made of SnO2, a power generation film 23 in which amorphous silicon layers are laminated in the order of p-type / i-type / n-type, an ITO layer 24a, and an Al layer 24b. The back electrode 24 is sequentially formed, and the solar cell module 25 is configured. On the back electrode side of the solar cell module 25, a blue glass substrate (back surface) having the same dimensions and thickness as the substrate 21 with an adhesive sheet 26 at the center of the module and a waterproof adhesive 27 at the periphery. Substrate) 28 is bonded. The blue plate glass substrate 28 is attached to the back surface of the blue plate glass substrate 21 and then heated to be solidified.
[00 14 ]
Electrode terminals 29 and 30 are taken out from the blue glass substrate 28 side. In the cross-sectional view of the main part of FIG. 1 (B), by connecting the electrode terminal 29 to the part of the back surface electrode side of the solar cell module 25 laminated on the soda glass substrate 21 via the silver paste 29a, Take out electricity. The method for taking out the electrode terminal 30 is the same as that for the electrode terminal 29.
[00 15 ]
According to the first embodiment, the inexpensive blue plate glass substrate 21 on which the solar cell module 25 is formed is bonded to another inexpensive blue plate glass substrate 28 via the adhesive sheet 26 to give strength. Therefore, compared with the conventional solar cell module structure using thick-walled tempered glass, the number of adhesive sheets can be reduced while maintaining the strength, and the material cost can be reduced due to the elimination of the rubber frame, etc., thereby reducing the cost. . In addition, since the periphery of the connecting portion (adhesive sheet 26) between the soda glass substrates 21 and 28 is surrounded by the waterproof adhesive 27, it is possible to prevent moisture from entering between the soda glass substrates 21 and 28. Furthermore, since it is not necessary to use a rubber frame as in the prior art, the construction process can be reduced. Furthermore, since the panel size is smaller than the conventional size, panel structures of various sizes can be manufactured by combining a single panel, so that the degree of freedom of the panel size can be greatly increased as compared with the conventional size.
[00 16 ]
(Example 2) Reference is made to FIG. However, the same members as those in FIG. In Example 2, the blue plate glass substrate 21 on which the solar cell module 25 is formed is partially cut out to a predetermined size to obtain blue plate glass substrates 21a and 21b, and 40 cm × 90 cm on the back side of these blue plate glass substrates 21a and 21b. A blue plate glass substrate 31 is laminated (two modules are combined) to form a solar cell panel structure having a size of 40 cm × 90 cm. The gap between the soda glass substrates 21a and 21b is coated with a waterproof adhesive 32 to prevent rainwater from entering. In addition, in the said Example 2, although it is a case where two solar cell modules are combined, it is not restricted to this. The planar shape a rectangular solar battery panel structure 33 can be utilized paste through an adhesive (not shown) to the part of the simple slate roof 34 as shown in FIG.
[00 17 ]
Although not shown in the above embodiment, it is preferable to provide a hole for taking out the electrode in the center of the back side glass plate in any case. This hole is also effective as an air vent for the adhesive resin. Moreover, in the said Example, although the case where the soda glass board | substrate was used as a board | substrate for back surfaces was described, you may use the material which can maintain intensity | strength and smoothness, such as not only this but a stainless steel board and a plastic board.
[00 18 ]
Furthermore, in the above embodiment, specific numerical values are shown for the shape, thickness, or material of each member of the soda glass substrate. However, this is an example, and this limits the scope of rights of this patent. It is not something.
[00 19 ]
【The invention's effect】
As described in detail above, according to the present invention, two inexpensive glass plates are stacked and strengthened, and the periphery is sealed with a waterproof adhesive resin, thereby preventing deterioration due to moisture and reducing cost. It is possible to provide a solar cell panel structure that can be achieved.
[Brief description of the drawings]
FIG. 1 is an explanatory view of a solar cell panel structure according to Embodiment 1 of the present invention.
FIG. 2 is an explanatory diagram of a solar cell panel structure according to Embodiment 2 of the present invention.
FIG. 3 is an explanatory diagram of a simple slate roof to which a solar cell panel structure according to Example 2 of the present invention is attached.
FIG. 4 is an explanatory diagram of a conventional solar cell panel structure.
FIG. 5 is an explanatory view showing a state of taking out electrodes on the back surface side of the solar cell panel structure of FIG. 4 ;
FIG. 6 is a cross-sectional view taken along the line A-A of FIG.
[Explanation of symbols]
21, 28 ... Blue plate glass substrate,
22 ... Transparent electrode,
23 ... Power generation membrane,
24 ... back electrode,
25 ... solar cell module,
26 ... Adhesive sheet,
27 ... Waterproof adhesive,
33, 41, 42, 43 ... Solar cell module structure .

Claims (1)

A rectangular glass substrate for the back surface;
A plurality of solar cell modules in which a transparent electrode, a power generation film, and a back electrode are sequentially formed on a rectangular transparent glass substrate;
Comprising
At least one side of the back glass substrate is a multiple of the size of one side of the transparent glass substrate,
Wherein the plurality of solar cell modules, the back electrode side through an adhesive is adhered to be the back glass substrate side on the back surface glass substrate,
The periphery of the plurality of solar cell modules is closed with a waterproof adhesive having waterproofness,
The gap between the plurality of solar cell modules is closed with a waterproof adhesive having waterproofness,
The solar cell panel structure from which an electrode terminal is taken out from the said glass substrate side for back surfaces.

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