JP2004014556A - Solar battery module and solar battery device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a solar battery module which is lightweight, has high stiffness, and in particular, is preferably adopted to large-size solar battery devices. <P>SOLUTION: The solar battery module is obtained by arranging solar cells on the front face of a metal-resin composite plate. The module is lightweight as compared with those in which a glass plate or a metal plate is solely used, and has high stiffness as compared with those in which a resin plate is solely used. As a consequence, since the module is lightweight and stiff, even if the solar battery module is of a large size, the handling is easy, and the necessity of giving stiffness by reinforcements or frames is lowered. Besides, in the case of suffering an impact, the composite plate is hard to be cracked. Moreover, the metal-resin composite plate is easy to be worked after it is used as a base plate or is assembled to form a solar battery module. <P>COPYRIGHT: (C)2004,JPO

Description

【００２７】
樹脂板に発泡したポリエチレンを用いた実施例１は、比較例と較べ３分の１以下の比重となり、極めて軽量の太陽電池モジュールが得られていることが判る。また、実施例２及び実施例３といった、樹脂板に無発泡のものを用いても比重は比較例と較べ、極めて小さいものとなっており、金属樹脂複合板を用いることで軽量な太陽電池モジュールが得られることが判る。
【００２８】
かかる構成により、例えば金属樹脂複合板に不燃性を具備させるために、樹脂板に水酸化アルミニウム等の無機フィラーを配合し、樹脂板の比重が若干大きくなった場合でも、比重１．５以下の太陽電池モジュールは容易に得られることとなる。
【００２９】
図３は、本発明に係わる蓋体を有する貯水槽に設けられた太陽電池装置を示す説明図である。太陽電池モジュール１０は、貯水槽３０上に設けられた枠体２０を用いて置き並べられることで蓋体１００を形成する。ここで、太陽電池モジュール１０は剛性が高く、補強材などを使用することなく枠体２０上に設置でき、更には風荷重に対しても耐えうるものとなる。更に太陽電池モジュール１０は軽量であることから、枠体２０上に置き並べられる際や、貯水槽３０のメンテナンス時に取り外し、取り付けを行う際にも取り扱いが容易なものとなり得る。
【００３０】
図４は、図３に示した実施形態におけるＡ−Ａ断面図を示すものである。太陽電池セル２が発電を行うことで従来特に機能を有することがなかった蓋体１００に発電機能を具備させ、貯水槽３０の占める大きな面積を有効に活用することができる。また、太陽電池セル２が暗色系のものであることから、蓋体１００の表面からの太陽光の照り返しを低減できる。また本発明に係わる太陽電池モジュール１０は、金属樹脂複合板１が遮光性のものであることから、水Ｗが貯水される貯水槽３０上に設けられた蓋体１００により、貯水槽３０への太陽光の入射を防ぐことができ、貯水槽３０に藻などが繁茂することを防止し貯水槽３０のメンテナンスの頻度を低減できる。
【００３１】
【発明の効果】
金属樹脂複合板の前面に太陽電池セルを配置して太陽電池モジュールを形成することで、ガラス板や金属板を単独で用いたものより軽量で、また樹脂板を単独で用いたものより剛性の高い太陽電池モジュールを得ることができる。従って、太陽電池モジュールが大型のものとなっても、軽量で且つ剛性が高いことから、取り扱いが容易で、補強材や枠材等により剛性を具備させる必要を低減することができる。また衝撃がかかった場合でも、ガラスより割れにくい。更に金属樹脂複合板は、基板とする場合や、太陽電池モジュールにした後でも加工が容易なものである。
【図面の簡単な説明】
【図１】
本発明に係わる金属樹脂複合板の一例を示す断面図である。
【図２】
本発明に係わる太陽電池モジュールの、実施の一形態を示す断面図である。
【図３】
本発明に係わる太陽電池装置の、実施の一形態を示す断面図である。
【図４】
図３に示した太陽電池装置の、Ａ−Ａ断面図である。
【符号の説明】
１　　金属樹脂複合板
１１　樹脂板
１２　金属箔
２　　太陽電池セル
２１　透光性の合成樹脂
２２　保護部材
１０　太陽電池モジュール
２０　枠体
３０　貯水槽
１００　蓋体
Ｗ　　水[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention relates to a solar cell module in which solar cells are arranged on a substrate and electric power is generated when sunlight is incident on the solar cells.
[0002]
[Prior art]
A solar cell module that uses a semiconductor to form a solar cell and arranges it on a substrate to generate electric power by the incidence of sunlight is now very commonly used. A number of inventions have been disclosed. In these conventional solar cell modules, glass is disposed in front of the solar cell, or a metal plate or a resin plate is used alone as a substrate for holding the solar cell.
[0003]
[Problems to be solved by the invention]
However, arranging glass on the front surface of the solar cell can provide rigidity while ensuring translucency, but if the size is large, the weight increases and handling becomes difficult. Further, it is glass and has a drawback that it is easily broken by an impact.
[0004]
Further, when a metal plate is used alone as a substrate, although the strength as a solar cell module is increased, it is also mainly used for a small-sized solar cell module due to its heavy weight. When a large-sized solar cell module is formed using a metal plate as a substrate, handling is inconvenient, and it is difficult to additionally install a solar cell module in a place where an increase in weight is not allowed.
[0005]
In addition, when a resin plate is used alone as a substrate, although the problem as described in the preceding paragraph is unlikely to occur even when a large-sized solar cell module is formed, the rigidity of the solar cell module is low and it is easy to bend. Therefore, when it is installed outdoors or the like, it is necessary to increase the rigidity by providing a frame or a reinforcing material.
[0006]
The present invention has been made in view of the above problems, and has as its object to provide a solar cell module which is lightweight, has high rigidity, and is particularly preferably applied to a large-sized solar cell module.
[0007]
[Means for Solving the Problems]
In order to solve the above problems, the present invention has the following configuration. That is, the solar battery cell that generates electricity by sunlight is arranged on the front surface of the metal-resin composite plate.
[0008]
By using a metal-resin composite plate as a substrate to form a solar cell module, it is lighter than one with a glass plate on the front or a substrate with a metal plate alone, and one with a resin plate alone A more rigid solar cell module can be obtained.
[0009]
Here, the metal-resin composite plate according to the present invention is a resin-plated metal foil having a thickness of about 0.1 mm to 0.8 mm is joined and integrated to have a thickness of 2 mm or more. The rigidity is increased by arranging a metal with high hardness on the outer edge. The metal foil may be arranged on one surface of the resin plate to have a canapé structure, but it is preferable to arrange the metal foil on both surfaces of the resin plate to form a sandwich structure because the rigidity is further increased.
[0010]
Further, the solar cell is characterized in that it is disposed between the metal-resin composite plate and a translucent protective member for protecting the solar cell.
[0011]
Furthermore, the solar cell is characterized in that it is sealed with a translucent synthetic resin.
[0012]
Furthermore, the solar cell module according to the present invention has a specific gravity of 1.5 or less.
[0013]
Further, a solar cell device according to the present invention is a solar cell device provided in a water storage tank having a lid, wherein the lid is formed using the solar cell module according to any one of claims 1 to 3. It is characterized by having been done.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
Embodiments of the present invention will be specifically described below with reference to the drawings.
FIG. 1 is a cross-sectional view illustrating an example of the metal-resin composite plate according to the present invention. A metal foil 12 is integrated on both sides of a resin plate 11 via an adhesive layer 13 to form a metal-resin composite plate 1. A metal foil 12 having a high Young's modulus is arranged on the surface where the bending moment acts strongly, and the resin plate 11 is arranged on the inner side where the action of the bending moment is weak, thereby providing a rigidity close to that of metal and a specific gravity close to that of resin. Can be realized.
[0015]
Here, the metal forming the metal foil 12 is not particularly limited, and iron, steel, aluminum, stainless steel, titanium, zinc, or the like may be used, but a light weight and low-cost aluminum are used. Is preferred. The resin forming the resin plate 11 is also not particularly limited, and may be polyethylene, polypropylene, polystyrene, polyvinyl acetate, polyvinyl chloride, polyvinylidene chloride, polycarbonate, polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, Polyphenylene sulfide, polyamide, polyurethane, polymethacrylate, polyacrylonitrile, ABS, phenolic resin, melamine resin, formaldehyde resin, urea resin, unsaturated polyester resin, epoxy resin, natural rubber and its derivatives, etc. can be used alone or in two kinds It may be formed using the above. In addition, inorganic fillers such as aluminum hydroxide and calcium hydroxide, flame retardants and the like may be blended to provide nonflammability and flame retardancy. Further, a foaming agent or the like may be added and molded to form air bubbles in the resin plate to further reduce the weight. Further, a plasticizer, a stabilizer, a foaming assistant, an ultraviolet absorber, a pigment Etc. may be blended as necessary.
[0016]
FIG. 2 is a cross-sectional view showing an embodiment of the solar cell module according to the present invention, in which solar cells 2 that generate electricity by sunlight are arranged on the front surface of the metal-resin composite plate 1 as shown in FIG. Things. The solar cell 2 may be simply adhered to the front surface of the metal-resin composite plate 1, but as shown in this embodiment, the solar cell 2 is sealed with a light-transmitting synthetic resin 21, It is preferable that corrosion of the metal 2 and insulation with the metal-resin composite board 1 be achieved. Further, it is preferable to provide a protective member 22 on the outer surface of the light-transmitting synthetic resin 21 to prevent the light-transmitting synthetic resin 21 from being deteriorated.
[0017]
Here, as the light-transmitting synthetic resin 21, it is preferable to use a resin having adhesiveness in addition to light-transmitting properties, such as EVA (ethylene-vinyl acetate copolymer), PVB (polyvinyl butyral), modified polyethylene, and modified polypropylene. On the metal-resin composite plate 1, these translucent synthetic resins 21 are melted by heat to seal the solar cells 2, thereby sealing the solar cells 21 and simultaneously transmitting the light. The synthetic resin 21 is adhered to the metal-resin composite plate 1, sealing and adhesion are performed simultaneously, and the manufacturing process can be simplified. It is preferable that the surface of the metal resin composite plate 1 on the side where the solar battery cells 2 are arranged is insulated by an insulating coating of a fluorine resin, a polyester resin or the like. Further, by making the color of the coating a bright color such as white or yellow, the sunlight passing through the gaps of the solar cell 2 is scattered, and the scattered light is incident on the solar cell 2, and furthermore, This is preferable because generated power can be increased.
[0018]
The protective member 22 is not particularly limited as long as it is light-transmitting, but is preferably a synthetic resin that hardly causes deterioration such as discoloration when installed outdoors, for example, a film formed using a fluororesin, Deterioration or damage may be prevented by using a thin glass that cannot contribute to the rigidity of the solar cell module.
[0019]
With this configuration, even if the solar cell module 10 becomes large, it is lightweight and has high rigidity, so that it is easy to handle and the need to provide rigidity with a reinforcing material or a frame material can be reduced. Also, even when impacted, it is less likely to break than glass. Further, since the metal-resin composite plate 1 can be cut to a desired size by, for example, making a cut with a cutter or the like and dividing from the cut, the metal-resin composite plate 1 can be made into a substrate rather than a metal plate alone, Processing is easy even after making it into a module. Further, the metal-resin composite plate 1 has excellent heat insulation properties, and even in a state where heat is applied from the side opposite to the side where the solar cells 2 are arranged, the heat is cut off to reduce the performance of the solar cells 2 due to heat. Can be prevented. Furthermore, since it has excellent insulation properties, it is possible to prevent electric leakage to the side opposite to the side where the solar battery cells 2 are arranged and electric shock due to contact.
[0020]
Here, the specific gravity of the solar cell module formed using the metal-resin composite plate according to the present invention will be described below with reference to examples and comparative examples.
[0021]
(Example 1)
A metal foil made of aluminum having a thickness of 0.15 mm is bonded to both sides of a resin plate formed by foaming 1.5 times polyethylene resin having a specific gravity of 0.92 to obtain a metal resin composite plate having a thickness of 3.0 mm. . On one side of the metal-resin composite plate, a 0.4 mm-thick transparent synthetic resin layer made of EVA is formed on both sides of a 0.4 mm-thick solar cell to seal the solar cell. Then, a fluororesin film having a thickness of 0.05 mm was stuck on the outer surface as a protective member to obtain a solar cell module according to Example 1 of the present invention.
[0022]
(Example 2)
A solar cell module according to Example 2 of the present invention was obtained in the same manner as in Example 1 except that the resin plate was non-foamed and the thickness of the metal foil was 0.2 mm.
[0023]
(Example 3)
A solar cell module according to Example 2 of the present invention was obtained in the same manner as in Example 2 except that the thickness of the metal foil was 0.5 mm and the thickness of the metal-resin composite plate was 4.0 mm.
[0024]
(Comparative example)
A solar cell module as a comparative example was obtained in the same manner as in Example 1 except that a 2.0 mm-thick aluminum plate was used instead of the metal-resin composite plate.
[0025]
The specific gravity was measured for each of the solar cells described above as examples and comparative examples, and the results are shown in Table 1.
[0026]
[Table 1]

[0027]
Example 1 using foamed polyethylene for the resin plate had a specific gravity of one-third or less as compared with the comparative example, indicating that an extremely lightweight solar cell module was obtained. Further, even when non-foamed resin plates such as those of Examples 2 and 3 are used, the specific gravity is extremely small as compared with the comparative example, and a lightweight solar cell module is obtained by using the metal resin composite plate. Is obtained.
[0028]
With such a configuration, for example, in order to make the metal-resin composite board nonflammable, an inorganic filler such as aluminum hydroxide is added to the resin board, and even when the specific gravity of the resin board is slightly increased, the specific gravity is 1.5 or less. A solar cell module will be easily obtained.
[0029]
FIG. 3 is an explanatory view showing a solar cell device provided in a water storage tank having a lid according to the present invention. The solar cell modules 10 form the lid 100 by being arranged using the frame 20 provided on the water storage tank 30. Here, the solar cell module 10 has high rigidity, can be installed on the frame body 20 without using a reinforcing material, and can withstand a wind load. Further, since the solar cell module 10 is light in weight, it can be easily handled when placed and arranged on the frame 20 or when detached and attached during maintenance of the water storage tank 30.
[0030]
FIG. 4 is a sectional view taken along line AA in the embodiment shown in FIG. When the solar cell 2 generates power, the lid 100, which has no particular function in the related art, is provided with a power generation function, and the large area occupied by the water storage tank 30 can be effectively used. Further, since the solar cell 2 is of a dark color, it is possible to reduce the reflection of sunlight from the surface of the lid 100. Further, in the solar cell module 10 according to the present invention, since the metal-resin composite plate 1 has a light-shielding property, the lid 100 provided on the water storage tank 30 in which the water W is stored stores the water W into the water storage tank 30. It is possible to prevent the incidence of sunlight, prevent the growth of algae and the like in the water storage tank 30, and reduce the frequency of maintenance of the water storage tank 30.
[0031]
【The invention's effect】
By arranging solar cells on the front of the metal-resin composite plate to form a solar cell module, it is lighter than those using a glass plate or a metal plate alone, and more rigid than those using a resin plate alone. A high solar cell module can be obtained. Therefore, even if the solar cell module becomes large, it is lightweight and has high rigidity, so that it is easy to handle, and it is possible to reduce the necessity of providing rigidity with a reinforcing material or a frame material. Also, even when impacted, it is less likely to break than glass. Further, the metal-resin composite plate can be easily processed even when it is used as a substrate or after being made into a solar cell module.
[Brief description of the drawings]
FIG.
It is sectional drawing which shows an example of the metal-resin composite board concerning this invention.
FIG. 2
BRIEF DESCRIPTION OF THE DRAWINGS It is sectional drawing which shows one Embodiment of the solar cell module which concerns on this invention.
FIG. 3
BRIEF DESCRIPTION OF THE DRAWINGS It is sectional drawing which shows one Embodiment of the solar cell apparatus concerning this invention.
FIG. 4
FIG. 4 is a cross-sectional view taken along line AA of the solar cell device shown in FIG. 3.
[Explanation of symbols]
REFERENCE SIGNS LIST 1 metal-resin composite plate 11 resin plate 12 metal foil 2 solar cell 21 translucent synthetic resin 22 protective member 10 solar cell module 20 frame 30 water storage tank 100 lid W water

Claims (5)

A solar cell module, wherein solar cells that generate electricity by sunlight are arranged on the front surface of a metal-resin composite plate. 2. The solar cell module according to claim 1, wherein the solar cell is disposed between the metal-resin composite plate and a translucent protection member that protects the solar cell. 3. The solar cell module according to claim 1, wherein the solar cell is sealed with a translucent synthetic resin. The solar cell module according to any one of claims 1 to 3, wherein the specific gravity of the solar cell module is 1.5 or less. A solar cell device provided in a water storage tank having a lid, wherein the lid is formed using the solar cell module according to any one of claims 1 to 4. .

Images