CN108365039B - Photovoltaic backboard capable of dissipating heat quickly - Google Patents

Photovoltaic backboard capable of dissipating heat quickly Download PDF

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Publication number
CN108365039B
CN108365039B CN201810354509.4A CN201810354509A CN108365039B CN 108365039 B CN108365039 B CN 108365039B CN 201810354509 A CN201810354509 A CN 201810354509A CN 108365039 B CN108365039 B CN 108365039B
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layer
water
substrate
film
adhesive
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CN108365039A (en
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陈祥花
陈志�
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GUANGDONG SOLAR ENERGY Co.,Ltd.
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Guangdong Solar Energy Co ltd
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
    • H01L31/042—PV modules or arrays of single PV cells
    • H01L31/048—Encapsulation of modules
    • H01L31/049—Protective back sheets
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    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
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    • Y—GENERAL 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy

Abstract

The invention discloses a photovoltaic back plate capable of quickly dissipating heat, which comprises an adhesive layer, a barrier layer, a substrate layer, a weather-resistant layer and a water absorbing layer, wherein the adhesive layer is attached to one surface of the barrier layer, the other surface of the barrier layer is attached to one surface of the substrate layer, the other surface of the substrate layer is attached to one surface of the weather-resistant layer through a first adhesive layer, and the water absorbing layer is coated on the other surface of the weather-resistant layer; the substrate layer comprises a reflective coating and a substrate, and the reflective coating is coated on one surface of the substrate, which is close to the barrier layer; the water absorption layer is a coating layer formed by water-retaining resin, a foaming agent, a curing agent, an ultraviolet absorbent, a light stabilizer and a skeleton net. The solar cell back plate can reflect most of light rays firstly during working, so that the main temperature rising source of the back plate is the silicon cell plate, and meanwhile, the solar cell back plate has a good heat conduction effect, can conduct heat generated by the silicon cell plate to the heat dissipation surface of the back plate in time, and can dissipate heat quickly through the water absorption layer.

Description

Photovoltaic backboard capable of dissipating heat quickly
Technical Field
The invention belongs to the technical field of photovoltaic power generation, and particularly relates to a photovoltaic back plate capable of quickly dissipating heat.
Background
Solar energy is an inexhaustible clean energy, solar power generation technology has also obtained the application in many fields, and solar power generation technology is also in quick development, and photovoltaic module is a device with solar energy direct conversion for the electric energy, and it divide into multilayer structure, and wherein photovoltaic backplate is one kind and installs in photovoltaic module's shady face, plays and supports photovoltaic module and separation steam, effect such as insulating.
In the process of photovoltaic energy generation, a silicon cell panel is directly exposed to the sun, the temperature of the silicon cell panel can continuously rise under the irradiation of sunlight, and the light-electricity conversion efficiency of the silicon cell panel can also fall along with the rise of the temperature of the silicon cell panel, so that the photovoltaic module needs to be timely cooled in the working process of the photovoltaic module, particularly in time or areas with high temperature.
Disclosure of Invention
The invention aims to provide a photovoltaic back plate capable of quickly dissipating heat.
The purpose of the invention can be realized by the following technical scheme:
a photovoltaic back plate capable of dissipating heat quickly comprises an adhesive layer, a barrier layer, a base material layer, a weather-resistant layer and a water absorbing layer, wherein the adhesive layer is attached to one surface of the barrier layer, the other surface of the barrier layer is attached to one surface of the base material layer, the other surface of the base material layer is attached to one surface of the weather-resistant layer through a first adhesive layer, and the water absorbing layer is coated on the other surface of the weather-resistant layer;
the adhesive layer is an EVA film;
the substrate layer comprises a reflective coating and a substrate, the reflective coating is coated on one surface of the substrate close to the barrier layer, the reflective coating is aluminum powder paint, and the substrate is an aluminum foil layer;
the water absorption layer is a coating layer formed by water-retaining resin, a foaming agent, a curing agent, an ultraviolet absorbent, a light stabilizer and a skeleton net;
the water-retaining resin is one or the combination of at least two of PR-3005L type high polymer resin, PAAMPS polyacrylic acid-acrylamide super absorbent resin, cellulose skeleton grafted sodium acrylate super absorbent resin and sodium polyacrylate water-retaining resin, and the mass ratio of the water-retaining resin in the water-absorbing layer is 55.2-82%;
the foaming agent is a colorless or white surfactant foaming agent, and the mass ratio of the foaming agent in the water absorption layer is 3-6.7%;
the curing agent is one or the combination of at least two of aminoethyl piperazine, trimethyl hexamethylene diamine and aromatic amine m-phenylenediamine dihexyl triamine, and the mass ratio of the curing agent in the water absorbing layer is 0.7-4%;
the ultraviolet absorbent is one or the combination of at least two of 2, 4-dihydroxy benzophenone, 2-hydroxy-4-methoxy benzophenone, 2- (2 ' -hydroxy-3 ', 5 ' -di-tert-phenyl) -5-chlorobenzotriazole, resorcinol monobenzoate, tris (1, 2, 2, 6, 6-pentamethylpiperidinyl) phosphite, 4-benzoyloxy-2, 2, 6, 6-tetramethylpiperidine and 2-hydroxy-4-n-octyloxy benzophenone, and the mass ratio of the ultraviolet absorbent in the water absorbing layer is 0.2-3%;
the light stabilizer is one or the combination of more than two of rutile type titanium dioxide, 2-hydroxy-4-methoxybenzophenone, 2-2 (-hydroxy-3, 5-di-tert-butylphenyl) -5-chlorobenzotriazole and 2- (2-hydroxy-5-methylphenyl) benzotriazole, and the mass ratio of the light stabilizer in the water absorbing layer is 1.2-4.5%.
As a further scheme of the present invention, the first adhesive layer is one or a combination of two of an epoxy adhesive, a polyurethane adhesive, an acrylate adhesive, and a silicone resin adhesive.
In a further embodiment of the present invention, the water-absorbing layer has a thickness of 300 μm to 900 μm.
As a further scheme of the invention, a white water-stop film is laid on the surface of the water absorption layer, and the water-stop film and the water absorption layer are not fixed.
As a further aspect of the present invention, the weather-resistant layer includes a film substrate and a film coating layer, the film coating layer encloses the film substrate, the film substrate is made of glass fiber, and the film coating layer is made of polytetrafluoroethylene resin.
As a further aspect of the invention, the thickness of the film coating is greater than 0.5mm, and the mass ratio of film coating to film substrate is greater than 9: 1.
as a further scheme of the invention, the barrier layer is a self-adhesive protective film, and the barrier layer is selected from any one of a PEP film, an OPP film and a PE film.
As a further scheme of the invention, the skeleton net is cut into small sections of glass fibers, the length of the glass fibers is less than the thickness of the water absorbing layer, and the mass ratio of the skeleton net in the water absorbing layer is 12-35%.
The invention has the beneficial effects that: the solar cell back plate can reflect most of light rays firstly during working, so that the main temperature rising source of the back plate is the silicon cell plate, and meanwhile, the solar cell back plate has a good heat conduction effect, can conduct heat generated by the silicon cell plate to the heat dissipation surface of the back plate in time, and can dissipate heat quickly through the water absorption layer.
Drawings
The invention will be further described with reference to the accompanying drawings.
Fig. 1 is a schematic structural view of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
A photovoltaic backboard capable of dissipating heat quickly is shown in figure 1 and comprises an adhesive layer 1, a blocking layer 2, a substrate layer 3, a weather-resistant layer 4 and a water absorbing layer 5, wherein the adhesive layer 1 is attached to one surface of the blocking layer 2, the other surface of the blocking layer 2 is attached to one surface of the substrate layer 3, the other surface of the substrate layer 3 is attached to one surface of the weather-resistant layer 4 through a first adhesive layer 6, the water absorbing layer 5 is coated on the other surface of the weather-resistant layer 4, during installation, the backboard is attached to other components through the adhesive layer 1 and installed to form a photovoltaic module, and the water absorbing layer 5 is located in the external environment.
The adhesive layer 1 is an EVA film, is used for connecting the photovoltaic back plate and the silicon cell panel, and plays a role in fixing the silicon cell panel.
The barrier layer 2 is a self-adhesive protective film, and the barrier layer 2 is made of any one of a PEP film, an OPP film and a PE film.
The substrate layer 3 comprises a reflection coating and a substrate, the reflection coating is coated on one surface of the substrate close to the barrier layer 2, the reflection coating is made of aluminum powder paint, most light can be effectively reflected, heat caused by direct irradiation of illumination on the photovoltaic backboard is reduced, meanwhile, the aluminum powder paint has a good heat conduction effect, heat on the silicon battery plate can be well conducted, and the substrate is made of an aluminum foil layer and has a good heat conduction effect.
The first adhesive layer 6 is one or a combination of two of epoxy resin adhesive, polyurethane adhesive, acrylate adhesive and organic silicon resin adhesive.
The weather-resistant layer 4 comprises a film substrate and a film coating, the film coating wraps the film substrate to form a film material with sufficient structural strength, the film substrate is made of glass fibers, the film coating is made of polytetrafluoroethylene resin, the thickness of the film coating is greater than 0.5mm, and the mass ratio of the film coating to the film substrate is greater than 9: 1, the weather-resistant layer 4 with the structure has the effects of electrical insulation, ultraviolet corrosion resistance and difficult aging, and has a self-cleaning function in rain, and the cleaning is convenient and quick.
The water absorbing layer 5 is a coating layer formed by water-retaining resin, a foaming agent, a curing agent, an ultraviolet absorbent, a light stabilizer and a skeleton net, and the thickness of the water absorbing layer 5 is 300-900 microns;
the water-retaining resin is one or the combination of at least two of PR-3005L type high polymer resin, PAAMPS polyacrylic acid-acrylamide super absorbent resin, cellulose skeleton grafted sodium acrylate super absorbent resin and sodium polyacrylate water-retaining resin, and the mass ratio of the water-retaining resin in the water-absorbing layer 5 is 55.2-82%;
the foaming agent is a colorless or white surfactant foaming agent, the foaming agent can form a rich internal cavity structure in the water absorbing layer 5, the water absorbing layer 5 cannot deform, crack and the like due to obvious volume change in the water absorbing and drying processes of the water absorbing layer 5, the colorless or white foaming agent is selected and used at the same time, the water absorbing layer 5 cannot be colored, so that the absorption of the water absorbing layer 5 to illumination is effectively reduced, the mass ratio of the foaming agent in the water absorbing layer 5 is changed to a certain extent according to the specific type of the selected foaming agent, and the mass ratio of the foaming agent in the water absorbing layer 5 is 3-6.7%;
the curing agent is one or the combination of at least two of aminoethyl piperazine, trimethyl hexamethylene diamine and aromatic m-phenylenediamine dihexyl triamine, the curing agent has longer service time and lower toxicity, and the mass ratio of the curing agent in the water absorbing layer 5 is 0.7-4%;
the ultraviolet absorbent is one or a combination of at least two of 2, 4-dihydroxy benzophenone, 2-hydroxy-4-methoxy benzophenone, 2- (2 ' -hydroxy-3 ', 5 ' -di-tert-phenyl) -5-chlorobenzotriazole, resorcinol monobenzoate, tris (1, 2, 2, 6, 6-pentamethylpiperidinyl) phosphite, 4-benzoyloxy-2, 2, 6, 6-tetramethylpiperidine and 2-hydroxy-4-n-octyloxy benzophenone, and the mass ratio of the ultraviolet absorbent in the water absorbing layer 5 is 0.2-3%;
the light stabilizer is one or the combination of more than two of rutile type titanium dioxide, 2-hydroxy-4-methoxybenzophenone, 2-2 (-hydroxy-3, 5-di-tert-butylphenyl) -5-chlorobenzotriazole and 2- (2-hydroxy-5-methylphenyl) benzotriazole, and the mass ratio of the light stabilizer in the water absorbing layer 5 is 1.2-4.5%;
the skeleton net is formed by cutting glass fibers into small sections and then adding the small sections into the water absorbing layer 5, the length of the glass fibers is smaller than the thickness of the water absorbing layer 5, the glass fibers are prevented from penetrating through the water absorbing layer 5, and the mass ratio of the skeleton net in the water absorbing layer 5 is 12% -35%.
The layer 5 that absorbs water can once keep more water yield to take away a large amount of heats through the evaporation process of the water in the layer 5 that absorbs water, thereby play the effect of cooling.
As a further scheme of the invention, a white water-stop film is laid on the surface of the water-absorbing layer 5, and the water-stop film is not fixed with the water-absorbing layer 5, so that the water-absorbing layer 5 can be ensured to be breathable, the water-absorbing layer 5 is prevented from being directly irradiated by light, and the water loss of the water-absorbing layer 5 due to direct illumination is reduced.
The solar cell back plate can reflect most of light rays firstly during working, so that the main temperature rising source of the back plate is the silicon cell plate, and meanwhile, the solar cell back plate has a good heat conduction effect, can conduct heat generated by the silicon cell plate to the heat dissipation surface of the back plate in time, and can dissipate heat quickly through the water absorption layer 5.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims (6)

1. The photovoltaic backboard capable of dissipating heat quickly is characterized by comprising an adhesive layer (1), a barrier layer (2), a substrate layer (3), a weather-resistant layer (4) and a water absorption layer (5), wherein the adhesive layer (1) is attached to one side of the barrier layer (2), the other side of the barrier layer (2) is attached to one side of the substrate layer (3), the other side of the substrate layer (3) is attached to one side of the weather-resistant layer (4) through a first adhesive layer (6), and the water absorption layer (5) is coated on the other side of the weather-resistant layer (4);
the adhesive layer (1) is an EVA film;
the substrate layer (3) comprises a reflective coating and a substrate, the reflective coating is coated on one surface of the substrate close to the barrier layer (2), the reflective coating is aluminum powder paint, and the substrate is an aluminum foil layer;
the water absorbing layer (5) is a coating layer formed by water-retaining resin, a foaming agent, a curing agent, an ultraviolet absorbent, a light stabilizer and a skeleton net, a white water-resisting film is laid on the surface of the water absorbing layer (5), and the water-resisting film and the water absorbing layer (5) are not fixed;
the weather-resistant layer (4) comprises a film substrate and a film coating, the film coating wraps the film substrate, the film substrate is made of glass fibers, and the film coating is made of polytetrafluoroethylene resin;
the water-retaining resin is one or the combination of at least two of PR-3005L type high polymer resin, PAAMPS polyacrylic acid-acrylamide super absorbent resin, cellulose skeleton grafted sodium acrylate super absorbent resin and sodium polyacrylate water-retaining resin, and the mass ratio of the water-retaining resin in the water-absorbing layer (5) is 55.2-82%;
the foaming agent is a colorless or white surfactant foaming agent, and the mass ratio of the foaming agent in the water absorption layer (5) is 3-6.7%;
the curing agent is one or the combination of at least two of aminoethyl piperazine, trimethyl hexamethylene diamine and aromatic amine m-phenylenediamine dihexyl triamine, and the mass ratio of the curing agent in the water absorbing layer (5) is 0.7-4%;
the ultraviolet absorbent is one or the combination of at least two of 2, 4-dihydroxy benzophenone, 2-hydroxy-4-methoxy benzophenone, 2- (2 ' -hydroxy-3 ', 5 ' -di-tert-phenyl) -5-chlorobenzotriazole, resorcinol monobenzoate, tris (1, 2, 2, 6, 6-pentamethylpiperidinyl) phosphite, 4-benzoyloxy-2, 2, 6, 6-tetramethylpiperidine and 2-hydroxy-4-n-octyloxy benzophenone, and the mass ratio of the ultraviolet absorbent in the water absorbing layer (5) is 0.2 to 3 percent;
the light stabilizer is one or the combination of more than two of rutile type titanium dioxide, 2-hydroxy-4-methoxybenzophenone, 2-2 (-hydroxy-3, 5-di-tert-butylphenyl) -5-chlorobenzotriazole and 2- (2-hydroxy-5-methylphenyl) benzotriazole, and the mass ratio of the light stabilizer in the water absorbing layer (5) is 1.2-4.5%.
2. The photovoltaic back sheet capable of rapidly dissipating heat according to claim 1, wherein the first adhesive layer (6) is one or a combination of at least two of an epoxy adhesive, a polyurethane adhesive, an acrylate adhesive, and a silicone adhesive.
3. The photovoltaic backsheet for rapid thermal dissipation according to claim 1, wherein said water-absorbing layer (5) has a thickness of 300 μm to 900 μm.
4. The photovoltaic backsheet for rapid thermal dissipation according to claim 1, wherein the film coating has a thickness of more than 0.5mm and the mass ratio of film coating to film substrate is more than 9: 1.
5. the photovoltaic back sheet capable of rapidly dissipating heat as claimed in claim 1, wherein the barrier layer (2) is a self-adhesive protective film, and the barrier layer (2) is selected from any one of a PEP film, an OPP film and a PE film.
6. The photovoltaic back sheet capable of rapidly dissipating heat as claimed in claim 1, wherein the skeleton mesh is cut into small pieces of glass fibers, the length of the glass fibers is less than the thickness of the water absorbing layer (5), and the mass ratio of the skeleton mesh in the water absorbing layer (5) is 12% to 35%.
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CN103804072A (en) * 2013-12-31 2014-05-21 北京仁创三会农业科技有限公司 Intelligent nutrition substance
CN104201226A (en) * 2014-08-21 2014-12-10 乐凯胶片股份有限公司 Heat dissipation type solar cell backboard
CN104260519A (en) * 2014-08-26 2015-01-07 中天光伏材料有限公司 A self-cooling type photovoltaic backboard and a preparing method thereof

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Publication number Priority date Publication date Assignee Title
CN103804072A (en) * 2013-12-31 2014-05-21 北京仁创三会农业科技有限公司 Intelligent nutrition substance
CN104201226A (en) * 2014-08-21 2014-12-10 乐凯胶片股份有限公司 Heat dissipation type solar cell backboard
CN104260519A (en) * 2014-08-26 2015-01-07 中天光伏材料有限公司 A self-cooling type photovoltaic backboard and a preparing method thereof

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