JPH08116082A - Solar cell module and application method of solar cell array - Google Patents

Abstract

PURPOSE: To maintain a solar cell element part at a high temperature, and restrain the decrease of the output which is caused by light irradiation, by covering the surface opposite to the light receiving surface of a solar cell panel with a rear side lid member, and by filling a space between the solar cell panel and the lid member with an expandable synthetic resin. CONSTITUTION: In a solar cell panel 9, at least a solar cell element 5 and an output terminal 7 are formed on the surface opposite to the light receiving surface of a transparent plate 3. A rear side lid member 13 is fixed to the solar cell panel 9, covers the surface opposite to the light receiving surface of the solar cell panel 9, and forms a space between the solar cell panel 9 and the lid member 13. Output leads 15 are connected with the output terminal 7, and stretch outside the lid member 13. The space between the solar cell panel 9 and the lid member 13 is filled with expandable synthetic resin. Thereby the temperature of the solar cell panel 9 can be kept high, so that optical deterioration can be remarkably restrained, and the output is stabilized for a long term.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an amorphous silicon solar cell module capable of suppressing a decrease in output due to light irradiation by keeping the solar cell element portion at a high temperature, and a method for constructing a solar cell array. It is about.

[0002]

2. Description of the Related Art Since amorphous semiconductor solar cells can be easily thinned, they are expected to be put to practical use as inexpensive solar cells. Among them, a typical amorphous silicon solar cell is attracting attention as a next-generation solar cell because it can be formed at a low temperature and has a high degree of freedom in selecting a substrate. Such an amorphous silicon solar cell has a back surface side of a solar cell element composed of a laminated body in which a transparent conductive film / pin amorphous silicon layer / metal electrode layer are sequentially deposited on a transparent substrate. , A solar cell module is constructed by enclosing it with a filler or back sheet and attaching a frame such as aluminum.
It is installed outdoors and used. As shown in FIG. 9, the solar cell module 50 is a solar cell element including a laminated body in which a transparent conductive film / a pin amorphous silicon layer / a metal electrode layer are sequentially deposited on a transparent substrate 52. 54 is provided and further enclosed by a filling material 56 of ethylene vinyl acetate (EVA) or polyvinyl butyral (PVB), the back surface is protected by a back sheet 58 such as Tedlar, an aluminum frame 60 is provided at the end portion, and a butyl rubber or the like. It is fitted and fixed using the adhesive 62. Then, the output line 66 is taken out from the output terminal 64 provided at an appropriate position on the back sheet 58.

[0003]

Amorphous silicon solar cells have many advantages as described above, but on the other hand, they have a serious problem of the Stebler-Lonski effect (hereinafter referred to as photodegradation). It also has various problems. This is a phenomenon in which the photoelectric conversion efficiency decreases by about 25% (at room temperature) when exposed to sunlight, and the energy generated when electrons and holes generated in the photoelectric conversion layer recombine. It is considered that this is because the bond in the metastable state is broken and becomes a dangling bond, and the trap ratio of electrons and holes increases. In order to solve this photodegradation, various methods have been conventionally proposed. For example, a typical method is to provide a solar cell element in multiple layers, reduce the film thickness while keeping current balance between the upper layer and the lower layer, and increase the electric field strength in the photoelectric conversion layer to reduce the trapping ratio. It is a thing. However, even if such a method is used, photodegradation still exists, and the current situation is that no fundamental solution has been found. And such a photodegradation phenomenon is one of the factors that delay the practical application of the amorphous silicon solar cell in outdoor applications.

On the other hand, it is known that the photoelectric conversion efficiency lowered due to photodegradation is improved by heat treatment at a temperature of 80 ° C. to 90 ° C. or higher. 60 ℃ ~ 70 ℃
It only rose to. Then, it is estimated that the temperature increase of 30 ° C. reduces the photodegradation rate by about 8%. Therefore, if the temperature of the solar cell can be raised to the above temperature, the photodegradation rate can be improved to 10% or less. Further, the temperature dependence of the open circuit voltage of the amorphous silicon solar cell is about half that of the crystalline silicon solar cell, and the influence of the output decrease due to the temperature rise is less than that of the crystalline silicon solar cell. For example, in crystalline silicon solar cells, the maximum output power decreases by 0.5 to 0.7% when the temperature rises by 1 ° C., but in amorphous silicon solar cells, the maximum output power is 0.2 to 0.3%. . Therefore, in the amorphous silicon solar cell, the effect of improving the photodegradation can be sufficiently obtained by keeping the solar cell temperature at a high temperature. However, in the conventional solar cell module, it was impossible to raise the element temperature during use to the above temperature or higher.

[0005]

SUMMARY OF THE INVENTION The present invention provides an amorphous silicon-based solar cell module and a solar cell array capable of suppressing a decrease in output due to light irradiation by keeping the solar cell element portion at a high temperature. A construction method is provided, and as a solar cell module, a solar cell panel provided with at least a solar cell element and an output terminal on a surface side opposite to a light receiving surface of a translucent plate, and the solar cell is attached to the solar cell panel. A cover material that covers the surface on the side opposite to the light receiving surface of the panel and forms a space with the solar cell panel, and an output line that connects to the output terminal and extends to the outside of the cover material And a foamable synthetic resin filled in the space between the solar cell panel and the backside cover material. Further, as a construction method of the solar cell array, a solar cell element and an output terminal are provided on the surface side opposite to the light receiving surface of the translucent plate, and a solar cell panel from which an output line is taken out is installed in an outdoor installation target area. The characteristic feature is that a step and a step of applying a foamable synthetic resin to a surface opposite to the light receiving surface of the solar cell panel are used. You may provide the back side cover material which covers.

Such a solar cell module of the present invention can be manufactured by the following three methods. The back surface side cover material that covers the surface of the solar cell panel from which the output lines are taken out, opposite the light receiving surface of the solar cell panel, and forms a space between the solar cell panel and the surface opposite to the light receiving surface. After installing the output line and extending it to the outside of the back side cover member, the uncured foamable synthetic resin is injected into the space between the solar cell panel and the back side cover material to cure it. A solar cell module of the invention is obtained. An uncured expandable synthetic resin is applied to the surface of the solar cell panel from which the output line is taken out, opposite to the light receiving surface, by a method such as coating so as to cover the surface. Then, a space for covering the surface opposite to the light receiving surface of the solar cell panel and forming a space for accommodating the expandable synthetic resin already adhered between the surface of the solar cell panel and the surface opposite to the light receiving surface can be formed. The back surface side cover material is attached to obtain the solar cell module of the present invention. At this time, the output line is extended to the outside of the back cover member. The solar of the back side cover that covers the surface opposite to the light receiving surface of the solar cell panel and can form a space between the surface opposite to the light receiving surface of the solar cell panel to accommodate the foamable synthetic resin. An uncured foamable synthetic resin is applied to the surface of the battery panel side by a method such as coating. After that, a solar cell panel is attached to the back surface side cover material so as to cover the back surface side cover material to obtain the solar cell module of the present invention. At this time, the output line is extended to the outside of the back cover member. In any of the methods, the boundary between the solar cell panel and the backside cover material may be sealed with a sealing material or the like.

As described above, according to the method of constructing a solar cell array of the present invention, a solar cell in which a solar cell element and an output terminal are provided on the surface of the translucent plate opposite to the light receiving surface and an output line is taken out is provided. Using the step of installing the panel outdoors in the installation target area (step A) and the step of applying the expandable synthetic resin to the surface opposite to the light receiving surface of the solar cell panel (step B), the foaming property is appropriately adjusted. The back surface side cover material that covers the adhered surface is provided on the adhered surface of the synthetic resin. In this case, the following five construction methods are possible. (1) A solar cell panel is attached to each of the installation target portions of one solar cell module in an array pedestal provided in advance in an outdoor installation location (the above corresponds to the above step A). Fixing this solar cell panel to the array frame is
A frame that is also used in the conventional solar cell module may be attached to the solar cell panel in advance, and the frame and the array frame may be fixed with screws or the like. Next, an uncured foamable synthetic resin is applied to the surface of the solar cell panel thus mounted opposite to the light receiving surface by a method such as coating (corresponding to the above step B) to obtain a solar cell array. (2) After (1) above, the foamable synthetic material that has already been applied between the surface of the solar cell panel opposite the light receiving surface and the surface of the solar cell panel opposite the light receiving surface. A solar cell array is obtained by attaching a backside cover material that can form a resin accommodation space. At this time, the output line is extended to the outside of the back cover member. (3) In an array frame installed in an outdoor installation location in advance, each of the installation target parts of one solar cell module covers the surface opposite to the light receiving surface of the solar cell panel,
Further, a back surface side lid member capable of forming a storage space for the foamable synthetic resin between the solar cell panel and the surface opposite to the light receiving surface is attached by a method such as screwing. Next, the uncured foamable synthetic resin is applied to the surface of the back cover material on the solar cell panel side by a method such as coating. Then, a solar cell panel is attached to the back cover material to cover it to obtain a solar cell array. When this solar cell panel is attached, a foamable synthetic resin is applied to the surface of the solar cell panel opposite to the light receiving surface. Therefore, in this method, the above steps A and B are performed.
And will be done at the same time. At this time, the output line is extended to the outside of the back cover member. (4) A solar cell panel is attached to each of the installation target parts of one solar cell module in an array pedestal provided in advance at an outdoor installation location (corresponding to step A above). This solar cell panel is fixed to the array frame by attaching the frame, which is also used in conventional solar cell modules, to the solar cell panel in advance and fixing the frame and the array frame with screws or the like. I'll do it. Next, a back surface side cover material that covers the surface opposite to the light receiving surface of the solar cell panel and can form a storage space for the foamable synthetic resin between the surface opposite to the light receiving surface of the solar cell panel Is attached by a method such as screwing. At this time, the output line is extended to the outside of the back cover member.
Then, the uncured foamable synthetic resin is injected into the space formed between the solar cell panel and the back cover material to obtain a solar cell array. At this time, the surface of the solar cell panel opposite to the light receiving surface is coated with the foamable synthetic resin (corresponding to the above step B). (5) In an array frame installed in an outdoor installation location in advance, each of the installation target parts of one solar cell module covers the surface opposite to the light receiving surface of the solar cell panel,
Further, a back surface side lid member capable of forming a storage space for the foamable synthetic resin between the solar cell panel and the surface opposite to the light receiving surface is attached by a method such as screwing. Next, a solar cell panel is attached in a form of covering the back surface side cover material (corresponding to the above step A). At this time, the output line is extended to the outside of the back cover member. Then, the uncured foamable synthetic resin is injected into the space formed between the solar cell panel and the back cover material to obtain a solar cell array. At this time, the surface of the solar cell panel opposite to the light receiving surface is coated with the foamable synthetic resin (corresponding to the above step B).

For the purpose of the present invention, it is preferable that the foamable synthetic resin is excellent in heat insulation, heat retention and heat storage.
Examples thereof include polystyrene foam, polyethylene foam, rigid polyurethane foam, soft polyurethane foam, rigid vinyl chloride foam, urea foam, phenol foam, rubber foam, and silicone resin foam. As a method for obtaining the foam, a generally known method (for example, the one described in a plastic reader published by Plastics Age Co., Ltd. as the 14th edition revised in 1985) is applied. Among them, polyurethane foam can be obtained by raw materials such as polyol, excess diisocyanate, cross-linking agent, foaming agent, catalyst and cell size adjusting agent. For the blowing agent, carbon dioxide from the reaction of water and isocyanate, Freon,
There are other decomposable organic foaming agents such as methylene dichloride, pentane, air to be added during mechanical mixing. When water is used as the cross-linking agent and the foaming agent, the proportion of urea bonds in the resin increases, so that it is preferable to use Freon or the like together in order to obtain a good quality foam. Silicone resins and emulsifiers can be used as the cell size adjusting agent, and amines and organic tin compounds can be used as the catalyst. For urea foam, the viscosity is 1
A viscous urea-formaldehyde aqueous solution (resin content 50 to 90%) of about 000 cp is added with a blowing agent such as propane, butane, butene, hexane, methyl chloride, and Freon in an amount of 2 to 30 parts at low temperature or in a closed container. Disperse,
It is obtained by adding an acid catalyst in the presence of an emulsifier and then raising the temperature to 15 to 115 ° C. Further, the urea resin initial condensate containing the emulsifier may be discharged while mechanically foaming while mixing the hydrochloric acid solution with an in-situ foaming machine. With respect to the phenol foam, the resol type initial condensate may be made into a cream form by blowing air with a foaming machine, and a curing agent may be mixed under stirring to be applied to a target portion. Furthermore, when making it creamy, about 1% of sodium bicarbonate may be added to help foaming. It cures quickly after adding the curing agent,
A foam having a density of 0.016 to 0.401 g / cm ³ is obtained. Benzenesulfonic acid, toluenesulfonic acid, sulfuric acid, phosphoric acid, etc. are used as the oxidation catalyst. If a volatile foaming agent such as Freon 11 is blended, foaming occurs due to reaction heat, and thus initial foaming is not necessary. See also Baker
A phenolic resin suitable for foaming such as ITE BVR-18763 is also commercially available, but a tough foam is prepared by copolymerizing 85 parts of resole with 5 parts of polyamide obtained from adipic acid and hexamethylenediamine. It is also possible to add polyvinyl alcohol or vinyl chloride resin to 5 to 20.
It is also possible to supplement the toughness, elasticity, etc. by blending about a part.
Generally, when a thermosetting resin is foamed at a high magnification, it becomes brittle, so that it is foamed at a low magnification of 10 times or less. However, in the case of the present invention, only the foamable synthetic resin after curing should be handled. Therefore, it is not necessary to take brittleness into consideration, and high heat insulation due to high-magnification foaming can be obtained.

Examples of silicone foams include those described in JP-A-5-31814. This method comprises reacting a silanol group-containing organopolysiloxane (component A) which is liquid at room temperature with an organohydrogenpolysiloxane (component B) which is liquid at room temperature in the presence of a dehydrogenative condensation reaction catalyst (component C). And a method of curing while generating hydrogen gas, and at the time of joining the above-mentioned three components A, B, and C, or after injecting an inert gas, mechanically mix the mixture, and discharge the mixture into the outside air. Then, it is foamed and cured.

[0010]

The present invention has the above-mentioned structure and has the following effects. First of all, as a solar cell module,
The surface of the solar panel opposite to the light receiving surface is covered with a back cover that can form a space between the solar panel and the foam between the solar panel and the back cover. Since the synthetic resin is foamed, the synthetic resin can be filled in an uncured state regardless of before and after attaching the back side cover member. This is because in the case of a synthetic resin that is not foamable, it cannot be used in an uncured state because it has an influence of stress or the like on the back surface of the solar cell panel due to shrinkage during curing, but since it is foamable in the present invention, This is because there is almost no influence of the above-mentioned stress. The filled foamable synthetic resin prevents the heat absorbed by the solar cell panel from being immediately dissipated from the back side of the panel, making the temperature of the solar cell panel within a temperature range sufficient to recover photodegradation. Will be able to maintain. Further, since the foamable synthetic resin has innumerable bubbles inside, it further suppresses heat conduction from the solar cell panel.

Also in the method of constructing the solar cell array of the present invention, the uncured synthetic resin can be used in the same manner as described above, and the method of depositing the same includes many methods such as coating, spraying and pouring. Can be adopted. Therefore, on-site foaming is possible regardless of the installation location and installation status of the solar cell array.

[0012]

EXAMPLES Examples of the present invention as described above will be described below. 1 and 2 show cross-sectional views of structural examples of the solar cell module 1 of the present invention. FIG. 1 shows a transparent plate 3
The solar cell element 5 on which at least an amorphous silicon semiconductor layer is formed is provided on the surface side opposite to the light receiving surface of
And a solar cell panel 9 provided with an output terminal 7 on the back sheet 8, and the solar cell panel 9 attached to the solar cell panel 9. The surface of the solar cell panel 9 that covers the surface opposite to the light-receiving surface of the solar cell panel 9 is formed at its end with a folded-back piece 11 for attachment to the array frame.
A back side cover member 13 that forms a space between the output terminal 7 and
Solar cell provided with an output line 15 connected to the outside and extending to the outside of the back surface side cover material 13, and a foamable synthetic resin 17 filling the space between the solar cell panel 9 and the back surface side cover material 13. Module 1. In this example, the solar cell panel 9 is placed on the step portion 21 provided on the inner rising piece 19 of the back surface side lid member 13 and fixed by filling the seal material 23 at the boundary portion between the two. The output line 15 from the solar cell panel 9 is a take-out hole 25 formed in the back side lid member 13.
It is taken out by inserting into. Further, in the structure shown in FIG. 2, a solar cell element 5 having at least an amorphous silicon based semiconductor layer formed is provided on the surface side opposite to the light receiving surface of the translucent plate 3, and the solar cell element 5 is enclosed with an EVA filling material 6 and The back sheet 8 such as a Tedler protects the back surface, the output terminals 7 are further provided on the back sheet 8, and an aluminum frame 27 for installation on the array frame is provided at the end of the transparent plate 3.
Is attached to the frame 27 of the solar cell panel 9 with the solar cell panel 9 fitted and bonded using an adhesive 29 of butyl rubber, and the surface of the solar cell panel 9 opposite to the light receiving surface is covered to cover the solar cell panel 9 A back surface side cover material 13 forming a space between the output terminal 7 and the output line 15 extending to the outside of the back surface side cover material 13, the solar cell panel 9 and the back surface side cover material 13. It is the solar cell module 1 provided with the foamable synthetic resin 17 with which the space between was filled.
In this example, unlike the example of FIG. 1 described above, the back surface side lid member 13 is attached to the installation frame 27 on the array frame. Further, the output line 15 from the solar cell panel 9 is taken out to the outside by inserting it into the taking-out hole 25 formed in the back surface side cover material 13. Such a solar cell module 1 of FIGS. 1 and 2 can be manufactured by the method as described in the section of the means for solving the above problems. In the case of manufacturing by the manufacturing method described above, a nozzle or the like may be inserted into the take-out hole 25 opened for inserting the output wire 15, and the uncured expandable synthetic resin 17 may be injected from the nozzle. In this case, for example, the portion where the solar cell panel 9 is placed on the back surface side cover material 13, that is, the step portion 2
You may provide the notch part for nozzle insertion, etc. in 1 part. Further, in the structure of FIG. 2, the frame 2
It is also possible to provide a notch or the like for inserting the nozzle in a part of the mounting portion of the back cover member 7 and the rear surface side cover member 13 similarly to the above.

As an embodiment other than those shown in FIGS. 1 and 2,
As shown in FIG. 3, the output line 15 from the solar cell panel 9
Can also be taken out to the outside from a gap between the back surface side cover material 13 and the solar cell panel 9, that is, a filling portion of the sealing material 23 in the figure. With such a structure, the connection between the solar cell modules 1 can be performed from the light receiving surface side. Further, as shown in FIG. 4, the output line 15 can be taken out from the take-out hole 25 formed in the inner rising piece 19. With such a structure, the wiring can be housed in the space between the folded piece 11 and the inner rising piece 19, and if this portion is sealed with a suitable synthetic resin or the like, the wiring is exposed to the outside. Since it is completely eliminated, the reliability is further improved.

In the solar cell panel 9 as described above, tempered glass, laminated glass, or other general light-transmitting substrate is used as the light-transmitting plate 3, and silicon oxide is used as necessary so that the glass component is not eluted. You may use what adhered etc. As the solar cell element 5, similar to that shown in FIG. 7, for example, a transparent conductive film / p− is formed on the transparent plate 3.
An i-n or n-i-p amorphous silicon layer / metal electrode layer is sequentially deposited to form a photoelectric conversion region formed of a laminated body. And the back side is EVA, P
The structure is such that the back surface is protected by a back sheet such as a Tedler in which an aluminum foil is sandwiched and filled with a filler such as VB or polyisobutylene resin.

Here, as the transparent conductive film, tin oxide or indium tin oxide is used as in the conventional solar cell element 5, and the amorphous silicon layer has a heterojunction structure of amorphous silicon carbide and amorphous silicon. It is also effective to reduce the series resistance by adopting microcrystallization of the p layer or the n layer on the transparent conductive film side or the metal electrode layer side, if necessary. As the metal electrode layer, a general metal material such as chromium, aluminum or silver is used as a single layer or a laminated structure. And since the element temperature becomes high in particular, in order to prevent the diffusion of the metal component between the amorphous silicon layer and the amorphous silicon layer, between the amorphous silicon layer and the metal electrode layer, the above-mentioned transparent conductive film or A metal diffusion preventing layer such as a silicide layer is interposed, or a silicide forming metal such as chromium or molybdenum is used as the metal electrode layer without interposing the metal diffusion preventing layer. A laminated structure is effective. Further, in terms of the effect of confining incident light, silver is particularly effective in terms of reflectance. Further, when EVA, PVB or the like is used as the filler, it may be sealed by a vacuum laminating method, and in the case of a polyisobutylene resin, it may be heated and fluidized and applied. As the structure of the solar cell panel 9, (a) a solar cell element formed of an amorphous silicon semiconductor layer is directly formed on a surface of a translucent plate such as glass opposite to the light receiving surface side, and heat is applied thereon. A protective coating such as a curable resin is formed, b) A cover glass is attached to the light receiving surface side of the solar cell panel of a) above with a transparent synthetic resin such as EVA, and c) A small transparent plate. A unit cell in which a solar cell element having an amorphous silicon semiconductor layer is formed on the surface of a translucent plate such as a large glass, which is opposite to the light receiving surface side, is laminated with a transparent synthetic resin such as EVA. Etc., the structure of the solar cell panel in the present invention is not limited at all.

The solar cell module 1 of the present invention as described above
When the temperature of the solar cell panel 9 was conventionally set to about 30 ° C. higher than the ambient temperature in the summer, the temperature of the solar cell panel 9 was increased by about 30 ° C. In the present invention, the temperature is 40 ° C to 50 ° C.
, Which was 80 ° C to 100 ° C in the summer. As a result, the conventional photo-deterioration was about 15 to 25%, but in the present invention, it was about 9%, and a large improvement effect was confirmed.

Next, the solar cell array structure obtained by the solar cell array construction methods (1) to (5) described in the section of the means for solving the above problems will be illustrated below.
FIG. 5 shows a partial cross-sectional view of the solar cell array structure 31 obtained by the construction method (1). In the example shown in the figure, the solar cell panel 9 shown in FIG. 2 is attached with screws to each of the installation target parts of one solar cell module 1 of the array frame 33 provided in the outdoor installation place in advance, and the solar cell is installed. The surface of the panel 9 opposite to the light receiving surface is coated with an uncured expandable synthetic resin 17 by coating. In this structure, the foamable synthetic resin 17 is exposed on the surface opposite to the light receiving surface of the solar cell array 31. Needless to say, this structure can also be applied to the existing solar cell array 31. Further, the foamable synthetic resin 17 was applied to the portion of the solar cell module 1 in the solar cell array 31 thus constructed, that is, in the solar cell array 31, on the surface opposite to the light receiving surface of the solar cell panel 9. The unit area is the solar cell module 1.

FIG. 6 is a partial sectional view of the solar cell array structure 31 obtained by the construction method (2). In the example shown in the figure, after the structure shown in FIG. 5 is constructed, the surface opposite to the light receiving surface of the solar cell panel 9 is covered, and between the surface opposite to the light receiving surface of the solar cell panel 9. The back side cover member 13 capable of forming a space for accommodating the foamable synthetic resin 17 already attached is attached, and the figure shows the back side cover member 13 attached to the frame 27. However, this back side cover material 13 is used for the array mount 3 as shown in FIG.
You may attach to 3. The output line 15 from the solar cell panel 9 is the extraction hole 2 formed in the back side lid member 13.
5 and a notch (not shown) or the like to be taken out. Further, in the structures shown in FIGS. 6 and 7, the back surface side cover material 13 is attached first, and finally the back surface side cover material 1 is attached.
It is also possible to inject the uncured expandable synthetic resin 17 from the take-out hole 25 of the output wire 15 opened in FIG. This construction method is the construction method of (4) above. Further, the unit area formed by the solar cell panel 9, the back side cover member 13, and the array mount 33 in the solar cell module 1 portion of the solar cell array 31 thus constructed, that is, in FIG. Based on the present invention solar cell module 1
Becomes

FIG. 8 is a partial sectional view of the solar cell array structure 31 obtained by the construction method (3). In the example shown in the figure, the array 31 that is previously installed at the outdoor installation location is used.
Each of the installation target portions of one solar cell module 1 of the mounting base 33 covers the surface opposite to the light receiving surface of the solar cell panel 9, and the folded-back pieces 11 for mounting to the array mounting base 33 are provided at the ends. Forming the solar cell panel 9
The back surface side cover material 13 capable of forming a space for accommodating the foamable synthetic resin 17 with the surface opposite to the light receiving surface is attached to the array frame 33 by a method such as screwing. After the uncured foamable synthetic resin 17 is applied to the surface of the solar cell panel 9 side of 13 by a method such as coating, the solar cell panel 9 is attached by covering the back surface side cover material 13 to obtain It is the solar cell array 31. Also at this time, the output line 15 has a take-out hole 25 formed in the back side cover member 13,
It is taken out by inserting it into a notch or the like (not shown). Further, in the structure of this figure, the solar cell panel 9 is attached first, and finally the output line 1 opened on the back side lid member 13 is used.
It is also possible to inject the uncured expandable synthetic resin 17 from the take-out hole 25 of FIG. This construction method is the construction method of (5) above. Furthermore, the portion of the solar cell module 1 in the solar cell array 31 thus constructed, that is, the solar cell array 3
A unit region formed by the solar cell panel 9 and the back surface side cover material 13 in 1 corresponds to the solar cell module 1 of the present invention shown in FIG.

Further, among the construction methods of the solar cell array according to the present invention, the construction methods of (1), (2) and (4) described above are performed by using only the step B. However, it can be applied.

[0021]

According to the present invention described in the section of the action, the following excellent effects can be obtained. First, as the solar cell module, the surface opposite to the light receiving surface of the solar cell panel is covered with a back surface side lid member capable of forming a space between the solar cell panel and the solar cell panel and the back surface side lid. Since the space between the material and the material is filled with expandable synthetic resin, there is no effect of stress during curing, so it is possible to fill the synthetic resin in an uncured state before and after mounting the back side lid material. Since there is no need to handle only the foamable synthetic resin after curing, there is no need to consider the brittleness of the synthetic resin, and it is possible to obtain high heat insulation due to high-magnification foaming, and the degree of freedom in selecting synthetic resins. Becomes higher. The filled foamable synthetic resin prevents the heat absorbed by the solar cell panel from being immediately dissipated from the back side of the panel, making the temperature of the solar cell panel within a temperature range sufficient to recover photodegradation. Since it can be maintained, and the temperature of the solar cell panel can be maintained at a high temperature of 80 ° C. or higher, the photodegradation phenomenon can be significantly suppressed, the cost is low, and the long-term output stability is excellent. And the high-magnification foaming makes it possible to maintain at a higher temperature.

Also in the method for constructing the solar cell array of the present invention, the uncured synthetic resin can be used in the same manner as described above, and as the method of applying the same, there are many methods such as coating, spraying and pouring. Since it enables the on-site foaming regardless of the installation location or installation situation of the solar cell array, there is no need to handle only the foamable synthetic resin after curing as described above, and it is not necessary to consider brittleness. In addition, it is possible to obtain high heat insulation due to high-magnification foaming, and the degree of freedom in selecting synthetic resin is increased. This makes it possible to maintain the temperature of the solar cell panel in a high temperature range that is sufficient to recover photodegradation, and at a low cost, greatly suppress the photodegradation phenomenon and to provide a solar output with excellent long-term stability of output. Enables realization of a battery array. Further, according to the concept of the present invention, it is possible to perform heat insulation treatment on the back surface side of an existing amorphous silicon solar cell array, and it can be applied not only to new manufacturing / installation but also to existing installation. It is vast.

[Brief description of drawings]

FIG. 1 is a cross-sectional explanatory view showing a structural example of a solar cell module of the present invention.

FIG. 2 is an explanatory sectional view showing a structural example of a solar cell module of the present invention.

FIG. 3 is an explanatory sectional view showing a structural example of a solar cell module of the present invention.

FIG. 4 is an explanatory sectional view showing a structural example of the solar cell module of the present invention.

FIG. 5 is an explanatory sectional view showing a structural example of a solar cell array according to the construction method of the present invention.

FIG. 6 is an explanatory sectional view showing a structural example of a solar cell array according to the construction method of the present invention.

FIG. 7 is an explanatory sectional view showing a structural example of a solar cell array according to the construction method of the present invention.

FIG. 8 is an explanatory sectional view showing a structural example of a solar cell array according to the construction method of the present invention.

FIG. 9 is a cross-sectional explanatory view showing a structural example of a conventional solar cell module.

[Explanation of symbols]

 1 Solar Cell Module 3 Transparent Plate 5 Solar Cell Element 6 Filling Material 7 Output Terminal 8 Back Sheet 9 Solar Cell Panel 11 Folding Piece 13 Back Side Cover Material 15 Output Line 17 Foaming Synthetic Resin 19 Rising Piece 21 Step Section 23 Sealing Material 25 take-out hole 27 frame 29 adhesive 31 solar cell array 33 array mount

Claims (3)

[Claims] 1. A solar cell panel provided with at least a solar cell element and an output terminal on a surface side opposite to a light receiving surface of a translucent plate, and a solar cell panel attached to the solar cell panel and opposite to the light receiving surface of the solar cell panel. Side cover material that covers the side surface and forms a space between the solar cell panel and the output line that extends to the outside of the back surface side cover material that is connected to the output terminals and the solar cell panel and the back surface. A solar cell module, comprising: a foamable synthetic resin filled in a space between the side cover material. 2. A step of installing a solar cell panel in which a solar cell element and an output terminal are provided on a surface side opposite to a light receiving surface of a translucent plate and an output line is taken out to an outdoor installation target area, and a solar cell. A method of applying a solar cell array using a step of applying an uncured foamable synthetic resin to the surface of the panel opposite to the light receiving surface. 3. The method of constructing a solar cell array according to claim 2, wherein a backside cover material that covers the adhered surface is provided on the adhered surface of the foamable synthetic resin.