JP2002083992A - Solar cell panel and its manufacturing method - Google Patents

Solar cell panel and its manufacturing method

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Publication number
JP2002083992A
JP2002083992A JP2000271892A JP2000271892A JP2002083992A JP 2002083992 A JP2002083992 A JP 2002083992A JP 2000271892 A JP2000271892 A JP 2000271892A JP 2000271892 A JP2000271892 A JP 2000271892A JP 2002083992 A JP2002083992 A JP 2002083992A
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JP
Japan
Prior art keywords
solar cell
heat insulating
cell panel
insulating layer
cell module
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
JP2000271892A
Other languages
Japanese (ja)
Inventor
Tomohiro Ito
Mikiya Shinohara
智啓 伊藤
幹弥 篠原
Original Assignee
Nissan Motor Co Ltd
日産自動車株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nissan Motor Co Ltd, 日産自動車株式会社 filed Critical Nissan Motor Co Ltd
Priority to JP2000271892A priority Critical patent/JP2002083992A/en
Publication of JP2002083992A publication Critical patent/JP2002083992A/en
Application status is Withdrawn legal-status Critical

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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/50Photovoltaic [PV] energy

Abstract

(57) [Problem] A curved solar cell which can be formed by a mold forming method with high mass productivity, has no fear of cracking or misalignment of the solar cell module at the time of molding, and suppresses light deterioration. Provided are a battery panel and a method of manufacturing the same. SOLUTION: A solar cell module, a transparent material support covering at least a sunlight incident surface of the module,
A heat insulating layer provided on the lower surface of the module, wherein the heat insulating layer is deformable at room temperature and includes heat insulating particles having pressure resistance, and a method of manufacturing the solar cell panel. .

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solar cell panel, and more particularly, to a solar cell panel which is formed so as to conform to the shape of a surrounding structure and which can be installed without impairing the external shape, and has excellent light deterioration resistance. Solar panels.

[0002]

2. Description of the Related Art For example, amorphous silicon (hereinafter referred to as "a
-Si ") can be manufactured on a resin film base that is easily curved. By utilizing the features of this film-type solar cell module, a curved solar cell panel can be manufactured, and can be incorporated into a structure having a curved surface without impairing the appearance.

However, since a resin film generally used as a base material of a thin film solar cell is required to be not deformed at a manufacturing temperature of a thin film semiconductor, a resin film having a high softening temperature such as polyimide is generally applied. Therefore, the shape cannot be formed by means such as a thermoforming step after the production of the film-type solar cell module, and a means for pasting to a support formed in advance into a curved surface is used.

As a support for the solar cell panel, a glass plate, a steel plate, a resin panel or the like can be used. In particular, when a resin panel is used, it can be formed into an arbitrary shape by a molding process using a mold. If the above-mentioned film-type solar cell module can be incorporated at the time of molding the resin structure, it can be formed into various shapes and can be a method for manufacturing a curved solar cell panel excellent in mass productivity.

As a technique relating to such a curved resin-made solar cell panel, for example, Japanese Patent Application Laid-Open No. 5-90625 discloses a solar cell having a structure as shown in FIGS. FIG. 6 shows the appearance of a solar cell panel 101, and 102 is a film type solar cell module, 1
Reference numeral 03 denotes a resin support. FIG. 7 is a cross-sectional structure of a portion B in FIG. 6 of the solar cell panel, in which a solar cell module 102 is attached on a support 103 via an adhesive layer 104. The solar cell module 102 has a thin film semiconductor layer 107 formed on a translucent base film 105 with a fusion preventing layer 106 interposed therebetween, and absorbs light incident from the base film 105 to generate electric power.

[0006] Such a conventional solar cell panel 101
Is manufactured by an injection molding process as shown in FIG.
That is, the male mold 109 and the female mold 1 having the desired panel shapes are formed.
10 is prepared, and the solar cell module sheet 111 for molding in FIG. 7 is loaded into a mold as shown in FIG. Thereafter, the mold is clamped, and the gate 10 provided on the male mold 109 is closed.
Inject the molten resin 103 'into the cavity from 8,
At the same time that the support 103 is formed by injection molding, the solar cell module 102 is bonded to the support 103 by the action of the adhesive layer 104 to complete the solar cell panel 101.

[0007]

However, in the production of such a conventional curved panel, there are the following problems. That is, in the conventional method of manufacturing a curved panel shown in FIGS. 6 and 7, the resin serving as a support is injected from a gate that is extremely small as compared with the size of the panel, so that a high pressure of several MPa to several tens MPa is applied. It is necessary to inject the resin, and the resin injected into the cavity from the gate enters the periphery while pressing the solar cell module near the gate against the inner surface of the cavity.

For this reason, the solar cell module is locally stressed during the injection molding, and the injected resin has a high viscosity even though it is in a molten state. When this occurs, a tensile stress is applied to the solar cell module. On the other hand, the thin film semiconductor layer, which is a main component of the solar cell, is a vitreous or crystalline inorganic material and hardly expands. Therefore, in the structure of the conventional solar cell module, although the upper and lower portions of the thin film semiconductor layer are protected by the adhesive layer and the anti-fusing layer, the effect of avoiding this stress cannot be said to be sufficient. Cracks may be generated near the gate and the like, which has been a factor in lowering the production yield.

Further, as described above, since a stress is applied from the vicinity of the gate of the solar cell at the initial stage of resin injection, the solar cell module may be displaced, which also causes a reduction in manufacturing yield.

On the other hand, a-Si is most often used for a thin film semiconductor layer of a film type solar cell module. However, a-Si has a characteristic (photodeterioration) that power generation performance deteriorates when light is irradiated for a long time. In order to suppress the deterioration of performance, a method of inserting a heat insulating material such as a foamed resin into a lower layer of the solar cell module to maintain the solar cell module at a high temperature has been used. However, when the injection molding method is used, since the resin is injected at a high pressure, the foamed structure of the heat insulating layer may be crushed and the heat insulating function may be lost, or the heat insulating layer itself may be cracked. there were.

In view of the above problems, the present invention can be formed by a mold forming method having high mass productivity, has no fear of causing cracks or misalignment in the solar cell module during molding, and suppresses light deterioration. It is an object of the present invention to provide a solar cell panel having a shape and a manufacturing method thereof.

[0012]

Means for Solving the Problems The present inventors have intensively studied to solve the above-mentioned problems, and provided the heat-insulating layer containing the heat-insulating material particles having excellent compressive strength on the lower surface of the solar cell module. Can be solved.

That is, the present invention having the above features is configured as follows for each claim.

According to a first aspect of the present invention, there is provided a solar cell module, a transparent material support for covering at least a sunlight incident surface of the module, and a heat insulating layer provided on a lower surface of the module. The solar cell panel is characterized in that the heat insulating layer includes a heat-resistant material particle having pressure resistance in a resin layer deformable at normal temperature.

According to a second aspect of the present invention, the heat insulating material particles have a compressive strength at 100 to 300 ° C. of 0.1 MPa.
The solar cell panel according to claim 1, wherein:

The invention according to claim 3 is the solar cell panel according to claim 1 or 2, wherein a volume content of the heat insulating material particles in the heat insulating layer is 20 to 60%. .

According to a fourth aspect of the present invention, the heat insulating particles have a major axis of not more than 20% of the thickness of the heat insulating layer. It is a battery panel.

According to a fifth aspect of the present invention, the heat insulating layer comprises:
The solar cell panel according to any one of claims 1 to 4, wherein the solar cell panel has a thermal resistance that is three times or more that of the transparent material support that covers the sunlight incident surface.

According to a sixth aspect of the present invention, in the solar cell according to any one of the first to fifth aspects, the transparent material support covering the sunlight incident surface is a thermoplastic resin. It is a panel.

According to a seventh aspect of the present invention, there is provided a method of stacking a solar cell module sheet on a heat insulating sheet containing a heat insulating material particle in a resin deformable at normal temperature, and The method for manufacturing a solar cell panel according to any one of claims 1 to 6, further comprising a step of heating to about 300 ° C and a step of applying a molding pressure with a gas or a liquid to shape it.

[0021]

The present invention configured as described above has the following effects.

According to the first aspect of the present invention, the solar cell module is provided with a heat insulating layer containing heat insulating particles which are deformable at normal temperature and have pressure resistance on the lower surface of the solar cell module. Can suppress generation of cracks and misalignment in the solar cell panel, and can improve the production yield of the solar cell panel. Further, a solar cell panel with less light deterioration can be obtained. Furthermore, a method for forming a solar cell panel with high mass productivity can be used.

According to the second aspect of the present invention, by defining the compressive strength of the heat insulating material particles, the heat insulating structure becomes stable even when a molding method having high productivity is applied, so that the heat insulating function is achieved. Design and manufacture of solar panels with
A solar cell panel with little light degradation can be obtained with a minimum necessary configuration.

According to the third aspect of the present invention, by defining the volume content of the heat insulating material particles, cracks generated in the heat insulating material can be suppressed, and a solar cell panel with less light deterioration due to a high heat insulating effect can be obtained. be able to.

According to the fourth aspect of the present invention, cracks generated in the heat insulating layer can be suppressed by defining the size of the heat insulating particles.

According to the fifth aspect of the invention, by defining the thermal resistance of the heat insulating layer, light deterioration of the solar cell module can be further reduced.

According to the sixth aspect of the invention, the degree of freedom in molding can be increased by making the transparent material support covering the sunlight incident surface thermoplastic.

According to the invention described in claim 7, cracks and misalignment occurring in the manufactured solar cell panel can be suppressed, and the yield of the solar cell panel can be improved. Further, a solar cell panel with less light deterioration can be obtained. Further, mass productivity of solar cell panel manufacturing can be improved.

[0029]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a solar cell panel and a method for manufacturing the solar cell panel according to the present invention will be described with reference to the drawings. In the present invention, “solar cell panel” refers to a panel having a structure in which one or more solar cell modules are arranged, and “normal temperature” refers to 25 ° C.

[0030] A first invention of the present application comprises a solar cell module, a transparent material support for covering at least a sunlight incident surface of the module, and a heat insulating layer provided on a lower surface of the module. The heat insulating layer is a solar cell panel comprising a resin layer deformable at normal temperature and heat insulating particles having pressure resistance.

FIG. 1 shows an embodiment of a solar cell panel according to the present invention. A heat insulating layer 4 is provided on the lower surface of the solar cell module sheet 3 in which the solar cell module 2 is sealed. In the present invention, the lower surface refers to a surface opposite to a surface on which sunlight enters. FIG. 2 shows a sectional configuration of a portion of the solar cell panel 1 in which the solar cell module 2 is sealed. That is, the solar cell module 2 is desirably a bendable film type module in which a photoactive layer 5 made of a thin film semiconductor (solar cell element) and performing photoelectric conversion is formed on a film substrate 6. The solar cell module 2 is sealed between the supports 8a and 8b via an adhesive layer 7 and held in a desired curved shape. The lower surface of the support 8b has an adhesive layer 7 used for adhesion with the heat insulating layer 4. Are arranged to form the solar cell module sheet 3. In FIG. 2, the thickness of each film is made uniform for convenience of explanation.

As the thin film semiconductor, a-Si (pin junction type, pn junction type) is generally used. In some cases, pn junction type polycrystalline silicon, CuInSe 2 , CrI
nS 2 , GaAs, CdS / Cu 2 S, CdS / CdT
e, CdS / InP, and various compound semiconductors such as CdTe / Cu 2 Te are also applicable.

As a method of manufacturing a thin film semiconductor, a-Si
In the case of, for example, plasma CVD using silane gas as a raw material, in the case of polycrystalline silicon, a sheet of molten silicon,
In the case of a compound semiconductor such as heat treatment of amorphous silicon, various known methods such as ion plating, ion beam deposition, vacuum deposition, sputtering, and electrodeposition can be used.

As the resin film substrate, polyimide,
Resins having a small coefficient of thermal expansion and a small coefficient of thermal shrinkage when heated to 200 ° C. or more, such as polyamide and polyester, can be used.

The support is formed into a curved shape by a mold forming method to maintain the panel shape. Therefore, the softening temperature is 1
It is preferable to use a thermoplastic resin having a temperature in the range of 00 to 300 ° C. Further, it is preferable that at least the sunlight incident surface be a transparent support having a transmittance of 90% or more. The support on the lower surface side is not provided with a particularly preferable specification of transmittance, but the same material as that of the sunlight incident surface can be used. Transparent materials that satisfy these requirements include styrene resin,
Examples include thermoplastic acrylic resin, polycarbonate, polyvinyl fluoride, and polyvinyl butyrate resin. The thermal conductivity of the resin material used for the support is 2 to 5 W / m · K.
Is generally used, and as a material having a smaller heat conductivity and effective as a heat insulating material, a material having a fine air chamber in an internal structure, such as a foam or cork, may be used.

The adhesive layer has a softening temperature lower than that of the resin used for the support, and can be made of a resin that softens during the process of forming the support and can thermally bond the respective resin layers. The adhesive layer is preferably selected as appropriate according to the molding temperature of the support to be used. Examples of the material constituting the adhesive layer include ethylene vinyl acetate, silicone resin, vinyl chloride, polyurethane, and polyvinyl butyrate.

The heat insulating layer functions to prevent heat from escaping from the lower surface of the solar cell module when irradiating sunlight, and to suppress the occurrence of light deterioration in the thin film semiconductor layer by maintaining the solar cell module at a high temperature. It is made of a material which has heat-resistant properties, that is, contains heat-insulating particles having excellent compressive strength, and can be deformed even at room temperature. The heat insulating layer that satisfies such characteristics can be formed by dispersing heat insulating particles, that is, a particle-shaped material having heat insulating properties, in a resin material that can be deformed at room temperature. By using a resin material that can be deformed at room temperature, the heat insulating layer itself can be deformed at room temperature. Examples of the resin material include butyl rubber and silicone rubber. Examples of the heat-insulating material particles include foamed glass, glass hollow fibers, glass thin tubes, carbonized cork, and porous diatomaceous earth sintered particles. The thermal conductivity is preferably 2 W / m · K or less.

The heat insulating particles preferably have a compressive strength at 100 to 300 ° C. of 0.1 MPa or more. 1
When selecting heat insulating particles that can withstand the molding pressure at a temperature of 00 to 300 ° C., JIS K7220 (1999)
Year), a material having a compressive strength of 0.1 MPa or more at the time of 10% deformation can be used as a suitable material. Further, in order to secure the degree of freedom of the manufacturing conditions at the time of molding, a material of 0.5 MPa or more can be a more suitable material. When such heat insulating material particles are contained in the heat insulating layer, the heat insulating material particles are not deformed by the pressure during molding, so that the heat insulating function is not lost, and the heat insulating material functions as an excellent heat insulating material even after molding.

The thermal resistance of the heat-insulating layer is determined by the content of the heat-insulating material particles and the thickness of the heat-insulating layer. Since cracks occur, the volume content of the heat insulating material particles is preferably 60% or less, and more preferably 50% or less in consideration of manufacturing variations. Further, if the volume content of the heat insulating material particles is too low, a region where the heat insulating material particles do not exist locally occurs in the cross-sectional direction regardless of the thickness of the heat insulating layer, and a desired heat insulating effect cannot be obtained. The volume content of the particles is preferably 20% or more, and more preferably 30% or more to keep the volume content uniform over the front surface. It is preferable that the thickness of the heat insulating layer is appropriately set in accordance with the content of the heat insulating material particles so as to exhibit the heat insulating effect. For example, when the volume content of the heat insulating material particles is 20%, the thickness is 3 mm or more and 60 mm or more. In the case of%, it is preferable to set it to 1 mm or more.

The size of the heat-insulating particles dispersed in the heat-insulating layer is preferably set to a certain ratio or less with respect to the thickness in order to prevent the resin such as rubber as a dispersion medium from being cracked at the time of molding. . Specifically, the long diameter of the heat insulating material particles is preferably 20% or less of the thickness of the heat insulating layer. In addition,
The lower limit is not particularly specified. Here, the major axis refers to the dimension of the longest part of the particle length, and can be separated by, for example, a sieve.

As described above, the function of the heat insulating layer is to prevent heat from escaping from the solar cell panel whose temperature has risen due to the incidence of sunlight, keep the temperature of the solar cell module at a high temperature, and maintain the light of the thin film semiconductor layer. The purpose is to suppress deterioration. The temperature of the solar panel rises effectively when it is installed perpendicularly to the incident sunlight, and heat transfer and heat are transmitted from the solar incident surface and the lower surface from the solar panel whose temperature is higher than the surroundings. Radiation radiates heat and is usually stabilized at a temperature of about 70 ° C. In the present invention, the heat radiation from the lower surface can be prevented by providing the heat insulating layer on the lower surface of the solar cell module. However, the temperature of the solar cell module is increased to 90 ° C. or more, and the photodegradation of the thin film semiconductor layer is more effectively performed. In order to suppress this, it is preferable that the thermal resistance in the vertical direction of the heat insulating layer is at least three times that of the transparent support that covers the sunlight incident surface.

As a method for forming the solar cell module sheet, various known methods such as a lamination method can be used. For example, on a plate of a double vacuum laminating apparatus, a material constituting a desired solar cell module sheet is sequentially laminated, the inside is evacuated using a vacuum pump, and the inside of the heated oven is evacuated by a vacuum pump. It can be formed by throwing in,
Of course, it is not limited to this method.

The thickness of the solar cell module sheet is generally about 0.2 to 6 mm, and the thickness of each layer is about 0.3 to 0.5 μm for the film type photoactive layer and about 0.3 to 0.5 μm, respectively. The material is about 10-20 μm and the adhesive layer is 20
And the support is about 0.1 to 3 mm.

Various known techniques can also be used for forming the heat insulating layer. For example, adding insulation particles to butyl rubber,
Add a carbon black, a plasticizer, a lubricant, a cross-linking agent, an accelerator, etc., knead with a roll, etc., fill in a mold and heat mold to form a heat insulating sheet. By adhering to the module sheet, a heat insulating layer can be formed.

The second invention of the present application is a step of laminating a solar cell module sheet on a heat insulating sheet containing heat insulating particles in a resin which can be deformed at room temperature; A method of manufacturing a solar cell panel, comprising a step of heating to about 300 ° C. and a step of applying a molding pressure with a gas or a liquid to shape the solar cell panel.

Hereinafter, an embodiment of a manufacturing method will be described with reference to the drawings.

As shown in FIG. 3A, the solar cell module sheet 3 and the heat insulating sheet 4 'are placed between the mold 9 having the desired shape and the pressurizing chamber 10.

Next, the solar cell 3 is heated using the heater 11 or the like.
Is heated from the mold side as shown in FIG. 3 (b), and the temperature at which the support softens and becomes moldable (usually 100 to 300).
(° C). Then, as shown in FIG. 3 (c), the mold 9 and the pressurizing chamber 10 are clamped while the molding solar cell module sheet 3 and the heat insulating sheet 4 'are placed.

Subsequently, as shown in FIG. 3 (d), a gas (for example, air) or a liquid 12 (for example,
Water) is introduced, the solar cell module sheet 3 and the heat insulating sheet 4 ′ are uniformly pressed by a gas or a liquid, pressed against the inner surface of the mold cavity, and cooled as they are to form the supports 8 a and 8 b into the mold shape. Let it be shaped. In addition,
The air in the cavity of the mold 9 may be pressurized while evacuating. The pressure to be applied can be appropriately selected according to the heat-insulating material particles, the support and the like to be used, and is preferably applied at a pressure of 0.1 to 1 MPa.

When a gas or a liquid is introduced into the pressurized chamber, the solar cell module sheet 3 and the heat insulating sheet 4 'are cooled by the gas or the liquid, but the supports 8a and 8b being formed by the heat insulating sheet 4' are separated from each other. Immediately without being cooled, it is maintained at a deformable temperature, and after being formed into the shape of the mold, the solar cell module is held in the desired curved shape until it is sufficiently cooled. Since the heat insulating sheet 4 'is made of a material that can be deformed even at room temperature, it can be deformed by air or liquid at room temperature in FIG. Therefore, the solar cell module sheet 3 can be deformed by itself while being maintained at a moldable temperature by the heat insulating effect. Form a layer.

The embodiment of the present invention has been described above.
The present invention is not limited to these, and various modifications can be considered. For example, the solar cell module sheet and the heat insulating sheet can be placed in a pressurized chamber after heating.

According to the solar cell panel and the method of manufacturing the solar cell panel according to the present invention, the heat insulating material is not crushed by the molding pressure, and the solar cell module can be maintained at a high temperature in the molded solar cell panel. . For this reason, it is possible to provide a curved solar cell panel with little light deterioration. Further, according to the method of the present invention, it is possible to mass-produce a solar cell panel having a curved surface at low cost. Furthermore, since the solar cell module sheet and the heat-insulating sheet deformable at room temperature are laminated and shaped, rapid cooling of the support can be prevented when a molding method using liquid or gas pressure is used, and Since molding can be performed while applying uniform stress to the entire battery module, generation of cracks due to stress in the solar battery module can be suppressed, and misalignment of the solar battery module can be prevented.

[0053]

EXAMPLE An a-Si solar cell was fabricated on a 300 × 100 mm square polyimide film between two polycarbonate support members having a size of 400 mm × 400 mm and a thickness of 1 mm via a polyvinyl butyral adhesive layer. Three film type solar cell modules were arranged side by side at 5 mm intervals, and used as solar cell module sheets for molding (see FIGS. 4 and 5). This solar cell module sheet is placed on various heat insulating sheets, placed in a mold, and placed in a mold.
Heating to 0 to 200 ° C. and introducing air into the pressure chamber while evacuating the mold cavity to form a pressure of 0.1 to 0.1
It was pressurized at 1 MPa for several seconds to form a cylindrical side surface having a curvature radius of 400 mm. In the case of pneumatic, a vacuum pressure pneumatic forming apparatus was used, and in the case of hydraulic, a hydraulic forming apparatus was used. Hereinafter, experimental results of a solar cell panel manufactured by such a method will be described.

<1. Insulation function change when heat insulating material is changed> As the heat insulating material, felt, glass wool and foamed resin whose compressive strength at 100 to 300 ° C. is less than 0.1 MPa, and compressive strength at 100 to 300 ° C. Used were cork carbide, foamed glass, glass tubules and porous diatomaceous earth sintered particles having a pressure of 0.1 MPa or more.

When the cross section of the heat insulating layer produced by using various heat insulating materials was confirmed, even when molded at 0.1 MPa, the air chamber of the felt or the glass wool was crushed, and the heat insulating function of the heat insulating layer was reduced. In addition, the foam resin dispersed in butyl rubber was softened by heating with the solar cell module sheet, and was compressed when pressed for molding, resulting in reduced heat insulation function. Regarding carbonized cork, foamed glass, glass tubules, and porous diatomaceous earth sintered particles dispersed in butyl rubber, each retains its shape at a molding pressure of 0.1 MPa, and the foamed glass is dispersed even at 1 MPa. The heat insulation layer kept its shape.

When the molding was performed using only the solar cell module sheet without using the heat insulating sheet, when the water was used, the support was cooled because the support was cooled, and when the air was used, the molding was performed at 0.1 MPa. Some molding defects were observed even under low pressure conditions. On the other hand, when the heat insulating sheet was used as in the present invention, the molding was successfully performed under the same conditions.

<2. Investigation of crack generation when the particle size of the heat insulating material is changed> A small piece of foamed glass is used as the heat insulating material. In the heat insulating layer of 3 mm, the volume content of the heat insulating material is 40%, and the long diameter of the foam glass small piece. However, the particle size was selected by sieving so as to be within 10, 20, 30, and 40% of the thickness of the heat insulating layer, and dispersed in butyl rubber to form a heat insulating layer. As a result, if the major axis of the small piece was 20% or less with respect to the thickness of the heat insulating layer, no crack was generated in the heat insulating layer even at a molding pressure of 1 MPa.

<3. Investigation of the effect of the volume content of the heat-insulating particles, the thickness of the heat-insulating layer, and the thermal resistance of the heat-insulating layer on the temperature holding function of the solar cell module> Porous diatomaceous clay with a particle size of 0.2 mm or less 20 to 60 particles
vol% butyl rubber and the thickness of the heat insulating layer is 1 to
Various solar cell panels of 3 mm were manufactured (Examples 1 to 3).
9). Further, for comparison, a solar cell panel from which the heat insulating layer was removed after the solar cell panel was prepared was investigated (Comparative Example 1).

When the solar cell module of Comparative Example 1 was irradiated with sunlight perpendicularly to these Examples and Comparative Examples,
Under the condition of ℃, the solar cell modules of the examples were stabilized at the temperatures shown in Table 1. Thereafter, the heat-insulating layer removed from these examples was adhered to a heater plate kept at 90 ° C. with a polyvinyl butyral-based adhesive, and heat radiation from the opposite side of the heater was blocked by a sufficiently thick heat-insulating material. The temperature difference between the heater plate side and the opposite side and the calorific value of the heater were measured, and the thermal resistance was calculated. The calculated value was a relative value to a result measured by the same method on a support made of polycarbonate on the sunlight incident surface side commonly used in Examples and Comparative Examples.

As shown in Table 1, when the relative value of the thermal resistance is three times or more, the temperature of the solar cell module is 90 ° C.
That's all. Further, with respect to the solar cell module having a thermal resistance relative value of less than three times, although the temperature was less than 90 ° C., the effect of increasing the temperature was observed in each case as compared with the comparative example.

[0061]

[Table 1]

<4. Light Deterioration Performance Investigation> Comparative Example 1 having no heat insulating layer, Examples 1, 2 and 5, in which the heat resistance of the heat insulating layer is less than three times that of the support on the sunlight incident surface side, and the heat of the heat insulating layer A plurality of Examples 3, 4 and 6 to 9 each having a resistance of three times or more as compared with the support on the sunlight incident surface side were produced, and an outdoor exposure experiment was performed. Both were fixed to an aluminum frame and left outdoors in a state where a load resistor capable of obtaining the maximum power from the solar cell was connected.

One year later, the power generation characteristics of each Example and Comparative Example 1 were measured and compared with the initial characteristics. As a result, in Comparative Example 1 having no heat insulating layer, light degradation of 20 to 30% was observed. . In Examples 1, 2 and 5, 15 to 25% of light deterioration was recognized, and those having less deterioration and those having larger deterioration than Comparative Example 1 were mixed. Examples 3, 4 and 6 to 9
The light deterioration was only 15%, and a clear effect was recognized as compared with Comparative Example 1 having no heat insulating layer.

<5. Investigation of cracks and misalignment associated with solar cell panel production> Cracks and misalignment of the solar cell module were inspected after the production of the solar cell panel, and no crack or misalignment was found in any of the examples.

[Brief description of the drawings]

FIG. 1 is a schematic view showing one embodiment of a solar cell panel according to the present invention.

FIG. 2 is a sectional view of a portion A of the solar cell panel of FIG.

FIG. 3 is a schematic view showing a manufacturing process of the solar cell panel of FIG.

FIG. 4 is a schematic top view of one embodiment of a solar cell panel according to the present invention.

5 is a sectional view of a solar cell module sheet of the solar cell panel of FIG.

FIG. 6 is a schematic view of a conventional solar cell panel.

7 is a sectional view of a portion B of the solar cell panel of FIG.

FIG. 8 is a schematic view showing a manufacturing process of the solar cell panel of FIG.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 solar cell panel 2 solar cell module 3 solar cell module sheet 4 heat insulating layer 4 ′ heat insulating sheet 5 photoactive layer 6 film substrate 7 adhesive layer 8 a support 8 b support 9 mold 10 pressurized chamber 11 heater 12 pressurized gas Or liquid

Claims (7)

[Claims]
1. A solar cell module, a transparent material support covering at least a sunlight incident surface of the module,
A solar cell panel comprising: a heat insulating layer provided on a lower surface of the module; and the heat insulating layer includes a heat-resistant material particle having pressure resistance in a resin layer deformable at normal temperature.
2. The solar cell panel according to claim 1, wherein the heat insulating material particles have a compressive strength at 100 to 300 ° C. of 0.1 MPa or more.
3. The solar cell panel according to claim 1, wherein a volume content of the heat insulating material particles in the heat insulating layer is 20 to 60%.
4. The solar cell panel according to claim 1, wherein the heat insulating material particles have a major axis of not more than 20% of the thickness of the heat insulating layer.
5. The solar cell according to claim 1, wherein the heat insulating layer has a thermal resistance that is three times or more that of the transparent material support that covers the sunlight incident surface. Battery panel.
6. The transparent material support covering the sunlight incident surface is made of a thermoplastic resin.
The solar cell panel according to any one of the above items.
7. A step of laminating a solar cell module sheet on a heat insulating sheet containing heat insulating particles in a resin deformable at room temperature, and a step of heating the laminated solar cell module sheet to 100 to 300 ° C. And applying a molding pressure with a gas or liquid to cause shaping,
A method for manufacturing a solar cell panel according to claim 1.
JP2000271892A 2000-09-07 2000-09-07 Solar cell panel and its manufacturing method Withdrawn JP2002083992A (en)

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WO2003005457A1 (en) * 2001-07-04 2003-01-16 Ebara Corporation Solar cell module and method of manufacturing the same
JP2006186237A (en) * 2004-12-28 2006-07-13 Du Pont Mitsui Polychem Co Ltd Method of manufacturing solar cell sealing material
JP2008193085A (en) * 2007-02-01 2008-08-21 Kuraray Europe Gmbh Method for manufacturing solar module by roll press method
JP2009238484A (en) * 2008-03-26 2009-10-15 Nissha Printing Co Ltd Method of manufacturing sheet with solar cell, and molding with solar cell
JP2010281861A (en) * 2009-06-02 2010-12-16 Ricoh Co Ltd Toner carrier, developing device, and image forming apparatus
WO2011151430A3 (en) * 2010-06-02 2012-04-26 Kuka Systems Gmbh Production device and method
JP2012523689A (en) * 2009-04-09 2012-10-04 サン−ゴバン グラス フランス Transparent composite structure that integrates photovoltaic cells
JP2012530201A (en) * 2009-06-17 2012-11-29 アズレ,アレクサンドル Roofing tile for roof
WO2013182399A1 (en) * 2012-06-05 2013-12-12 Saint-Gobain Glass France Sunroof comprising an integrated photovoltaic module
JP2015211553A (en) * 2014-04-25 2015-11-24 三菱電機株式会社 Holding frame, solar cell module, manufacturing device for solar cell module, and manufacturing method of solar cell module
EP3020072A4 (en) * 2013-07-10 2017-06-28 Google, Inc. High altitude aircraft with integrated solar cells, and associated systems and methods
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Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003005457A1 (en) * 2001-07-04 2003-01-16 Ebara Corporation Solar cell module and method of manufacturing the same
JP2006186237A (en) * 2004-12-28 2006-07-13 Du Pont Mitsui Polychem Co Ltd Method of manufacturing solar cell sealing material
JP2008193085A (en) * 2007-02-01 2008-08-21 Kuraray Europe Gmbh Method for manufacturing solar module by roll press method
JP2009238484A (en) * 2008-03-26 2009-10-15 Nissha Printing Co Ltd Method of manufacturing sheet with solar cell, and molding with solar cell
JP2012523689A (en) * 2009-04-09 2012-10-04 サン−ゴバン グラス フランス Transparent composite structure that integrates photovoltaic cells
JP2010281861A (en) * 2009-06-02 2010-12-16 Ricoh Co Ltd Toner carrier, developing device, and image forming apparatus
JP2012530201A (en) * 2009-06-17 2012-11-29 アズレ,アレクサンドル Roofing tile for roof
JP2016106189A (en) * 2009-06-17 2016-06-16 アズレ,アレクサンドル Rooftop light power generation tile
WO2011151430A3 (en) * 2010-06-02 2012-04-26 Kuka Systems Gmbh Production device and method
US8987040B2 (en) 2010-06-02 2015-03-24 Kuka Systems Gmbh Manufacturing means and process
WO2013182399A1 (en) * 2012-06-05 2013-12-12 Saint-Gobain Glass France Sunroof comprising an integrated photovoltaic module
US10056515B2 (en) 2012-06-05 2018-08-21 Saint-Gobain Glass France Roof panel having an integrated photovoltaic module
CN104364080A (en) * 2012-06-05 2015-02-18 法国圣戈班玻璃厂 Sunroof comprising an integrated photovoltaic module
EP3020072A4 (en) * 2013-07-10 2017-06-28 Google, Inc. High altitude aircraft with integrated solar cells, and associated systems and methods
US9957037B2 (en) 2013-07-10 2018-05-01 X Development Llc High altitude aircraft with integrated solar cells, and associated systems and methods
US10407153B2 (en) 2013-07-10 2019-09-10 Wing Aviation Llc High altitude aircraft with integrated solar cells, and associated systems and methods
JP2015211553A (en) * 2014-04-25 2015-11-24 三菱電機株式会社 Holding frame, solar cell module, manufacturing device for solar cell module, and manufacturing method of solar cell module

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