CN115621332A - High-strength weather-resistant packaging plate for photovoltaic cell and photovoltaic cell assembly - Google Patents
High-strength weather-resistant packaging plate for photovoltaic cell and photovoltaic cell assembly Download PDFInfo
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- CN115621332A CN115621332A CN202211324169.3A CN202211324169A CN115621332A CN 115621332 A CN115621332 A CN 115621332A CN 202211324169 A CN202211324169 A CN 202211324169A CN 115621332 A CN115621332 A CN 115621332A
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Classifications
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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
- H01L31/02—Details
- H01L31/0216—Coatings
- H01L31/02161—Coatings for devices characterised by at least one potential jump barrier or surface barrier
- H01L31/02167—Coatings for devices characterised by at least one potential jump barrier or surface barrier for solar cells
-
- 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
- H01L31/0481—Encapsulation of modules characterised by the composition of the encapsulation material
-
- 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
-
- 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
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Power Engineering (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Life Sciences & Earth Sciences (AREA)
- Photovoltaic Devices (AREA)
- Laminated Bodies (AREA)
Abstract
The invention discloses a high-strength weather-proof packaging plate for a photovoltaic cell and a photovoltaic cell assembly, wherein the high-strength weather-proof packaging plate comprises an ultraviolet-resistant fluorine film layer, an adhesive film layer and a transparent resin layer which are sequentially connected; the raw materials for manufacturing the ultraviolet-resistant fluorine film layer mainly comprise fluoroplastic and an ultraviolet-resistant agent; the transparent resin layer is made of high-strength thermoplastic transparent resin material. The photovoltaic cell assembly comprises a front plate, a first adhesive film layer, a cell piece, a second adhesive film layer and a back plate which are sequentially connected; the front plate is made of the high-strength weather-proof packaging plate, or the front plate and the back plate are both made of the high-strength weather-proof packaging plate. The packaging plate is light in weight, has high light transmittance and high water vapor barrier rate, can be popularized and applied to the field of photovoltaic cells in a large area, and the photovoltaic cell module after application is light in overall weight, has strong impact resistance and can reach the national test standard in weather resistance.
Description
Technical Field
The invention relates to the technical field of photovoltaics, in particular to a high-strength weather-resistant packaging plate for a photovoltaic cell and a photovoltaic cell assembly.
Background
The photovoltaic industry has developed rapidly, but the evolution of the basic materials, associated technologies and standards associated therewith has significantly lagged behind the industry's development. The structure of the traditional photovoltaic panel mainly comprises four parts, namely an ultra-white toughened glass front plate, an adhesive film, a solar cell panel and a back plate, wherein the photovoltaic front plate needs to meet the performance requirements of low self-explosion rate, high color consistency, high light transmittance, low ultraviolet transmittance, high impact strength and the like, so that the ultra-white toughened glass is widely adopted as the photovoltaic front plate in the market, and the ultra-white toughened glass has the advantages of high light transmittance, good color consistency, high strength and the like, but has the problems of too high specific gravity, incapability of curling, easiness in causing the reduction of bending strength and impact strength due to an ultra-thin structure, high ultraviolet transmittance, aging of internal devices, easiness in dust accumulation on the surface and the like, and the development of new fields such as photovoltaic building integration, photovoltaic vehicles, photovoltaic wearable equipment and the like is greatly limited.
For this reason, in recent years, the development of a package board made of a polymer material instead of tempered glass has been gradually started at home and abroad to solve the above technical problems. However, most of the packaging plates developed at present can not meet the technical standards of the photovoltaic industry in terms of impact resistance, fire resistance and the like whether being used as a photovoltaic front plate or a photovoltaic back plate. The Chinese invention application with publication number CN108022988A discloses a laminated structure of a photovoltaic module, and although each performance index can meet the use requirement of the photovoltaic industry, the laminated structure has the advantages of complex manufacturing process, narrow raw material selection range and higher production cost, and is difficult to adapt to mass production.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a high-strength weather-resistant packaging plate for a photovoltaic cell, which is light in weight, high in light transmittance and high in water vapor barrier rate, and can be popularized and applied to the field of photovoltaic cells in a large area.
The invention also aims to provide a photovoltaic cell assembly with the high-strength weather-resistant packaging plate, which is light in overall weight, strong in impact resistance and capable of reaching the national test standard in weather resistance.
The technical scheme of the invention is as follows: a high-strength weather-resistant packaging plate for a photovoltaic cell comprises an ultraviolet-resistant fluorine film layer, an adhesive film layer and a transparent resin layer which are sequentially connected; wherein, the raw materials for preparing the ultraviolet resistant fluorine film layer mainly comprise fluoroplastic and an ultraviolet resistant agent; the transparent resin layer is made of high-strength thermoplastic transparent resin material. In the structure of the packaging plate, the ultraviolet-resistant fluorine film layer can improve the weather resistance, the wear resistance and the water vapor barrier property of the whole structure of the packaging plate, and simultaneously, due to the addition of the ultraviolet-resistant agent, the ultraviolet light can be blocked, and the yellowing resistance and the aging resistance of the transparent resin layer are improved; the transparent resin layer has excellent impact resistance, electrical insulation performance and high light transmittance; the two components can cooperate with each other to improve the overall performance of the packaging plate.
When the anti-ultraviolet fluorine film layer is manufactured, the weight ratio of the main raw materials is as follows: 98-99.8 parts of fluoroplastic and 0.2-2 parts of anti-ultraviolet agent, wherein the selection of the anti-ultraviolet agent can ensure that the ultraviolet light transmittance is lower than 5% under the condition that the light transmittance of the fluorine film exceeds 90%, and the light transmittance and ultraviolet blocking performance of the anti-ultraviolet fluorine film are greatly improved.
Furthermore, one side or two sides of the ultraviolet-resistant fluorine film layer are also provided with a fluorine plastic layer, and the manufacturing raw materials of the fluorine plastic layer are mainly fluorine plastic; the ultraviolet resistant fluorine film layer and the fluoroplastic layer are formed in a co-extrusion mode. When the fluoroplastic layer is additionally arranged on the outer side (namely one side or two sides) of the ultraviolet-resistant fluorine film layer, the strength of the whole packaging plate can be further improved, and the packaging plate is formed in a co-extrusion mode, so that the adhesive force between the ultraviolet-resistant fluorine film layer and the fluoroplastic layer can be effectively improved, the use of glue is also avoided, and the formed packaging plate can meet the requirements of environmental protection better. On one hand, the structural design avoids the situation that the light transmittance and the surface performance of the single-layer anti-ultraviolet fluorine film are influenced by the overflow of anti-ultraviolet agent powder easily generated in the manufacturing process; on the other hand, the problem that the anti-ultraviolet agent migrates and overflows in the use process of the packaging plate is avoided, so that the anti-ultraviolet service life of the anti-ultraviolet fluorine film is prolonged.
The ultraviolet-resistant fluorine film layer is subjected to unidirectional stretching or bidirectional stretching after being extruded and molded; or the ultraviolet resistant fluorine film layer and the fluoroplastic layer are co-extruded and formed and then are subjected to unidirectional stretching or bidirectional stretching. After unidirectional stretching or bidirectional stretching, on one hand, the integral strength, the surface hardness and the scratch resistance of the ultraviolet-resistant fluorine film layer (or the ultraviolet-resistant fluorine film layer and the fluoroplastic layer) can be effectively improved; on the other hand, the regular arrangement of molecular chains and crystalline regions in the amorphous region in the fluoroplastic can be greatly improved, so that the crystallinity of the whole anti-ultraviolet fluorine film layer (or the anti-ultraviolet fluorine film layer and the fluoroplastic layer) is improved, water vapor permeation from the amorphous region is effectively prevented, the water vapor barrier property of the packaging plate is improved, and the service life of the silicon wafer is prolonged.
The thickness of the ultraviolet-resistant fluorine film layer is 10-50 μm; or the whole thickness of the ultraviolet-resistant fluorine film layer and the fluoroplastic layer is 10-50 mu m, and tests prove that the ultraviolet-resistant fluorine film layer with the thickness can effectively ensure that the water vapor barrier property and the ultraviolet resistance meet the requirements and can ensure the service life requirement of the photovoltaic cell module after application.
The transparent resin layer is prepared from one or more of PCTG (polyethylene terephthalate-1,4-cyclohexanedimethanol), PCTA (polyethylene terephthalate-acetate), PC (polycarbonate), COC (cyclic olefin copolymer), COP (cyclic olefin polymer) and TPX (poly-4-methyl-1-pentene) as raw materials. The materials are selected as raw materials, on one hand, the light transmittance of the transparent resin layer can be guaranteed to meet the requirement of the photovoltaic cell module, and on the other hand, the strength and the shock resistance of the transparent resin layer can be guaranteed under the condition that the glass fiber gridding cloth is not used.
The preparation raw materials of the transparent resin layer are also added with a flame retardant; or a flame retardant, an anti-ultraviolet agent and a light stabilizer are also added; or adding flame retardant, uvioresistant agent, light stabilizer and color master batch. The flame retardant is added to improve or further improve the flame retardant property of the transparent resin layer, so that the phenomenon that the packaging plate is burnt due to high temperature is avoided, the weather resistance of the transparent resin layer and even the whole packaging plate can be further improved by adding the ultraviolet resistant agent and the light stabilizer, and the color of the transparent resin layer can be changed by adding the color master so that the color master is adaptive to the external environment.
The thickness of the transparent resin layer is 0.2-1.5 mm, and tests show that only the transparent resin layer within the thickness range can effectively meet the requirements of hail impact resistance and strong wind resistance of the photovoltaic cell assembly on mechanical properties.
Furthermore, special treatments such as corona treatment, nano coating or frosting treatment and the like are added on the surface of the transparent resin layer on the surface where the transparent resin layer is connected with the adhesive film layer, so that the adhesive property of the transparent resin layer and the adhesive film EVA/POE is improved, and the long-term use reliability is improved.
The glue film layer is a hot melt glue layer or a glue layer; the film layer is also added with an anti-ultraviolet agent and a light stabilizer. The addition of the uvioresistant agent and the light stabilizer can improve the weather resistance of the adhesive film layer, thereby further improving the weather resistance of the whole packaging plate, effectively reducing the aging speed and prolonging the service life of the packaging plate.
When the high-strength weather-proof packaging plate is applied to a photovoltaic cell assembly, the principle is as follows: adopt high strength thermoplastic resin material to make transparent resin layer, this transparent resin layer is as the main bearing structure of whole packaging board, possess excellent shock resistance, electric insulating property, and high luminousness, improve fluoroplastics through anti ultraviolet agent simultaneously, form the anti ultraviolet fluoroplastics layer as the packaging board top layer, this top layer can improve the weatherability of packaging board overall structure, wearability, vapor barrier property, simultaneously owing to added anti ultraviolet agent, can improve the ultraviolet light separation, improve the anti-yellowing and the ageing-resistant performance of transparent resin layer, both synergistic effect can improve the overall performance of packaging board.
The invention also provides a photovoltaic cell assembly, which comprises a front plate, a first adhesive film layer, a cell piece, a second adhesive film layer and a back plate which are connected in sequence; wherein the front plate is the high-strength weather-resistant packaging plate; or the front plate and the back plate both adopt the high-strength weather-resistant packaging plate. When the high-strength weather-resistant packaging plate is adopted, compared with a traditional toughened glass front plate, the weight of the whole photovoltaic cell assembly can be effectively reduced, the application range of the photovoltaic cell assembly is enlarged, compared with the existing high polymer material packaging plate, the high-strength weather-resistant packaging plate is simpler in structure, can reach corresponding technical indexes, is lower in processing cost, and can realize mass production and application. In addition, the high-strength weather-resistant packaging plate not only can be used as a front plate of a photovoltaic cell assembly, but also can be used as a back plate of the photovoltaic cell assembly, the application range is wide, and the packaging use is more flexible.
Compared with the prior art, the invention has the following beneficial effects:
this resistant encapsulation board that waits that excels in that photovoltaic cell used combines together through the transparent resin layer that adopts the preparation of high strength thermoplastic resin material and the anti ultraviolet fluorine membrane layer after the modification, adopt toughened glass front bezel and macromolecular material encapsulation board among the replacement current photovoltaic cell, this encapsulation board structure obtains great degree of simplification, the raw materials of transparent resin layer is also comparatively abundant simultaneously, the cost is lower, and have light in weight, characteristics such as shock resistance is good, compensate its weatherability through the anti ultraviolet fluorine membrane layer after the modification, thereby the bulk strength and the weatherability of encapsulation board have been ensured. After tests, after the high-strength weather-resistant packaging plate is applied to a photovoltaic cell, indexes such as light transmittance, water vapor barrier rate, yellowing value, impact resistance and the like can reach or even exceed national test standards.
The high-strength weather-proof packaging plate for the photovoltaic cell has the light transmittance of 89 percent, can be used as a front plate or a front plate and a back plate simultaneously in a photovoltaic cell assembly, is flexible and convenient to apply, and can reduce the weight of the whole photovoltaic cell assembly to 3.5kg/m after being applied 2 The whole weight of the solar cell module is greatly reduced, but the shock resistance of the whole solar cell module is greatly improved, and the solar cell module can be widely popularized and applied to the fields of photovoltaic building integration, photovoltaic vehicles, photovoltaic wearable equipment and the like, and has a good market prospect.
Drawings
Fig. 1 is a schematic structural view of the high-strength weather-resistant packaging sheet in example 1.
Fig. 2 is a schematic structural view of the high-strength weather-resistant encapsulating sheet in embodiment 2.
Fig. 3 is a schematic structural diagram of a photovoltaic cell module in example 3.
Fig. 4 is a schematic structural view of a photovoltaic cell module in example 4.
In the drawings, the components indicated by the reference numerals are as follows: the solar cell panel comprises a front plate 1, an ultraviolet-resistant fluorine film layer 1-1, an adhesive film layer 1-2, a transparent resin layer 1-3, a fluoroplastic layer 1-4, a first adhesive film layer 2, a cell piece 3, a second adhesive film layer 4, a back plate 5, a weather-resistant layer 5-1, a back plate adhesive film layer 5-2 and a highly reflective flame-retardant resin layer 5-3.
Detailed Description
The present invention will be described in further detail with reference to examples, but the embodiments of the present invention are not limited thereto.
Example 1
The high-strength weather-resistant packaging plate for the photovoltaic cell comprises an ultraviolet-resistant fluorine film layer 1-1, a glue film layer 1-2 and a transparent resin layer 1-3 which are sequentially connected, as shown in fig. 1; wherein, the raw materials for preparing the ultraviolet resistant fluorine film layer mainly comprise fluoroplastic and an ultraviolet resistant agent; the transparent resin layer is made of high-strength thermoplastic transparent resin material. In the structure of the packaging plate, the ultraviolet-resistant fluorine film layer can improve the weather resistance, the wear resistance and the water vapor barrier property of the whole structure of the packaging plate, and simultaneously, due to the addition of the ultraviolet-resistant agent, the ultraviolet light can be blocked, and the yellowing resistance and the aging resistance of the transparent resin layer are improved; the transparent resin layer has excellent impact resistance and electrical insulation performance and high light transmittance; the two components can cooperate with each other to improve the overall performance of the packaging plate.
When the anti-ultraviolet fluorine film layer is manufactured, the weight ratio of the main raw materials is as follows: 98-99.8 parts of fluoroplastic and 0.2-2 parts of anti-ultraviolet agent, wherein the anti-ultraviolet agent is selected in parts to ensure that the ultraviolet light transmittance is lower than 5% under the condition that the light transmittance of the fluorine film exceeds 90%, and the light transmittance and the ultraviolet blocking performance of the anti-ultraviolet fluorine film are greatly improved. The thickness of the ultraviolet-resistant fluorine film layer is 10-50 mu m, and tests prove that the ultraviolet-resistant fluorine film layer with the thickness can effectively ensure that the water vapor barrier property and the ultraviolet resistance meet the requirements and can ensure the service life requirement of the photovoltaic cell assembly after application.
The transparent resin layer is made from one or more of PCTG (polyethylene terephthalate-1,4-cyclohexanedimethanol ester), PCTA (polyethylene terephthalate-acetate), PC (polycarbonate), COC (cyclic olefin copolymer), COP (cyclic olefin polymer) and TPX (poly 4-methyl-1-pentene). The materials are selected as raw materials, on one hand, the light transmittance of the transparent resin layer can be guaranteed to meet the requirement of the photovoltaic cell module, and on the other hand, the strength and the shock resistance of the transparent resin layer can be guaranteed under the condition that the glass fiber gridding cloth is not used. In order to further improve the performance of the transparent resin layer, in this embodiment, a flame retardant, or a flame retardant, an anti-ultraviolet agent, and a light stabilizer, or a flame retardant, an anti-ultraviolet agent, a light stabilizer, and a color masterbatch may be further added to the raw materials for making the transparent resin layer according to actual needs. The flame retardant is added to improve or further improve the flame retardant property of the transparent resin layer, so that the phenomenon that the packaging plate is burnt due to high temperature is avoided, the weather resistance of the transparent resin layer and even the whole packaging plate can be further improved by adding the ultraviolet resistant agent and the light stabilizer, and the color of the transparent resin layer can be changed by adding the color master so that the color master is adaptive to the external environment. The thickness of the transparent resin layer is 0.2-1.5 mm, and tests show that the mechanical property of the transparent resin layer in the thickness range can effectively meet the requirements of hail impact resistance and strong wind resistance of the photovoltaic cell module. Furthermore, special treatments such as corona treatment, nano coating or frosting treatment and the like are added on the surface of the transparent resin layer on the surface where the transparent resin layer is connected with the adhesive film layer, so that the adhesive property of the transparent resin layer and the adhesive film EVA/POE is improved, and the long-term use reliability is improved.
The adhesive film layer is a hot melt adhesive layer or an adhesive layer; the film layer is also added with an anti-ultraviolet agent and a light stabilizer. The addition of the uvioresistant agent and the light stabilizer can improve the weather resistance of the adhesive film layer, so that the weather resistance of the whole packaging plate is further improved, the aging speed of the packaging plate is effectively reduced, and the service life of the packaging plate is prolonged.
When the high-strength weather-proof packaging plate is applied to a photovoltaic cell assembly, the principle is as follows: the transparent resin layer is made of a high-strength thermoplastic resin material and serves as a main supporting structure of the whole packaging plate, the transparent resin layer has excellent shock resistance, electric insulation performance and high light transmittance, fluoroplastic is improved through an ultraviolet-resistant agent at the same time, an ultraviolet-resistant fluoroplastic layer serving as the surface layer of the packaging plate is formed, the surface layer can improve weather resistance, wear resistance and water vapor barrier performance of the whole structure of the packaging plate, ultraviolet resistance is improved due to the addition of the ultraviolet-resistant agent, yellowing resistance and aging resistance of the transparent resin layer are improved, and the whole performance of the packaging plate can be improved under the synergistic effect of the ultraviolet-resistant fluoroplastic layer and the ultraviolet-resistant fluoroplastic layer.
Example 2
Compared with the embodiment 1, the high-strength weather-resistant packaging plate for the photovoltaic cell of the embodiment is different in that: as shown in fig. 2, two sides of the uv-resistant fluorine film layer are further provided with fluoroplastic layers 1-4 (according to actual needs, a fluoroplastic layer may be added on only one side of the uv-resistant fluorine film layer), and the fluoroplastic layer is mainly made of fluoroplastic; the ultraviolet resistant fluorine film layer and the fluoroplastic layer are formed in a co-extrusion mode. When the fluoroplastic layers are additionally arranged on the two sides of the ultraviolet-resistant fluorine film layer, the strength of the whole packaging plate can be further improved, and the packaging plate is formed in a co-extrusion mode, so that the adhesive force between the ultraviolet-resistant fluorine film layer and the fluoroplastic layer can be effectively improved, the use of glue is also avoided, and the formed packaging plate can meet the requirements of green and environmental protection better. On one hand, the structural design avoids the situation that the light transmittance and the surface performance of the single-layer anti-ultraviolet fluorine film are influenced by the overflow of anti-ultraviolet agent powder easily generated in the manufacturing process; on the other hand, the problem that the anti-ultraviolet agent migrates and overflows in the use process of the packaging plate is avoided, so that the anti-ultraviolet service life of the anti-ultraviolet fluorine film is prolonged.
In the embodiment, the overall thickness of the ultraviolet-resistant fluorine film layer and the fluoroplastic layer is 10-50 μm, and tests prove that the ultraviolet-resistant fluorine film layer with the thickness can effectively ensure that the water vapor barrier property and the ultraviolet resistance meet the requirements, and can also ensure the service life requirement of the photovoltaic cell module after application.
In addition, after the ultraviolet resistant fluorine film layer and the fluoroplastic layer are co-extruded and formed, the formed three-layer structure is subjected to unidirectional stretching or bidirectional stretching. After the unidirectional stretching or the bidirectional stretching, on one hand, the integral strength, the surface hardness and the scratch resistance of the ultraviolet-resistant fluorine film layer (or the ultraviolet-resistant fluorine film layer and the fluoroplastic layer) can be effectively improved; on the other hand, the regular arrangement of molecular chains and crystalline regions in the amorphous region in the fluoroplastic can be greatly improved, so that the crystallinity of the whole anti-ultraviolet fluorine film layer (or the anti-ultraviolet fluorine film layer and the fluoroplastic layer) is improved, water vapor permeation from the amorphous region is effectively prevented, the water vapor barrier property of the packaging plate is improved, and the service life of the silicon wafer is prolonged.
Example 3
A photovoltaic cell module of this embodiment, as shown in fig. 3, includes a front plate 1, a first adhesive film layer 2, a cell sheet 3, a second adhesive film layer 4, and a back plate 5, which are connected in sequence; wherein, the front plate and the back plate both adopt the high-strength weather-resistant packaging plate described in embodiment 2. Compared with the traditional photovoltaic cell assembly, the weight of the whole photovoltaic cell assembly can be effectively reduced, the application range of the photovoltaic cell assembly is enlarged, compared with the existing high polymer material packaging plate, the high-strength weather-resistant packaging plate is simpler in structure, can reach corresponding technical indexes, is lower in processing cost, and can realize mass production and application. In addition, the high-strength weather-resistant packaging plate not only can be used as a front plate of a photovoltaic cell assembly, but also can be used as a back plate of the photovoltaic cell assembly, the application range is wide, and the packaging use is more flexible.
Example 4
A photovoltaic cell module of this embodiment, as shown in fig. 4, includes a front plate 1, a first adhesive film layer 2, a cell sheet 3, a second adhesive film layer 4, and a back plate 5, which are connected in sequence; the high-strength weather-resistant packaging plate in the embodiment 2 is adopted as the front plate, and the back plate is a high-reflection flame-retardant back plate formed after further improvement.
As shown in fig. 4, the back plate in this embodiment includes a weather-resistant layer 5-1, a back plate adhesive film layer 5-2, and a highly reflective flame-retardant resin layer 5-3, which are connected in sequence; the manufacturing raw materials of the highly reflective flame-retardant resin layer mainly comprise thermoplastic resin and reflective inorganic filler; in the formed highly reflective flame-retardant resin layer, the thermoplastic resin is used as a matrix, and the reflective inorganic filler is distributed in the matrix. In the back plate structure, the high-reflection flame-retardant resin layer is prepared by adopting a thermoplastic resin material added with a reflection inorganic filler as a main structure, has stronger mechanical supporting capacity, and can also utilize the structure formed by dispersing the reflection inorganic filler in the thermoplastic resin material, so that the whole high-reflection flame-retardant resin layer has stronger reflection rate, thereby better replacing the existing toughened glass back plate for use. And the weather-resistant layer is arranged mainly for enhancing and improving the weather resistance and the wear resistance of the whole back plate structure, thereby ensuring the service life of the back plate structure.
Wherein, the raw materials for preparing the highly reflective flame-retardant resin layer also comprise a flame retardant, and the weight ratio of the thermoplastic resin, the reflective inorganic filler and the flame retardant is as follows: 60-95 parts of thermoplastic resin, 5-40 parts of reflective inorganic filler and 0.5-5 parts of flame retardant. Or, the preparation raw materials of the highly reflective flame-retardant resin layer also comprise glass fibers, and the weight ratio of the thermoplastic resin, the reflective inorganic filler and the glass fibers is as follows: 60-95 parts of thermoplastic resin, 5-30 parts of reflective inorganic filler and 5-20 parts of flame retardant.
The thermoplastic resin is one or more of polyamide, polycarbonate, modified polyphenyl ether, thermoplastic polyester, polyphenylene sulfide, polyimide, polyether ether ketone or acrylonitrile-butadiene-styrene copolymer. The light-reflecting inorganic filler is titanium dioxide (TiO) 2 ) Zinc sulfide (ZnS), silicon monoxide (SiO), silicon dioxide (SiO) 2 ) Silicon nitride (Si) 3 N 4 ) Magnesium sesquioxide (Ma) 2 O 3 ) Zinc oxide (ZnO), barium sulfate (BaSO) 4 ) Fluoride (CaF) 2 And MgF 2 Mixture of (2), silicon carbide (SiC), chromium oxide (Cr) 2 O 3 ) Or Boron Nitride (BN).
The thickness of the high-reflection flame-retardant resin layer is 0.1-1 mm, and the thickness can ensure the strength, the water vapor barrier property and the impact resistance of the high-reflection flame-retardant resin layer. Furthermore, special treatments such as corona treatment, nano coating or frosting treatment are added on the surface of the high-reflection flame-retardant resin layer connected with the back plate adhesive film layer, so that the adhesive property of the high-reflection flame-retardant resin layer and the adhesive film EVA/POE is improved, and the long-term use reliability is improved.
The weather-resistant layer is a fluoroplastic layer or a film layer with a fluorine coating or a film layer made of other weather-resistant materials.
The back plate adhesive film layer is a hot melt adhesive layer or an adhesive layer; an anti-ultraviolet agent and a light stabilizer are also added into the back plate adhesive film layer. The addition of the uvioresistant agent and the light stabilizer can improve the weather resistance of the adhesive film layer, thereby further improving the weather resistance of the whole packaging plate, effectively reducing the aging speed and prolonging the service life of the packaging plate.
The principle of the high-light-reflection-rate flame-retardant back plate is as follows: the high-reflection flame-retardant resin layer is used as the most main structure and is required to meet the performance requirements of high strength, high reflection, flame retardance, high impact strength and the like, so that the high-reflection flame-retardant resin layer is prepared by adopting a thermoplastic resin material added with a reflection inorganic filler, the reflection inorganic filler is dispersed in the thermoplastic resin material used as a matrix, the thermoplastic resin matrix has stronger mechanical supporting capacity, and meanwhile, the whole high-reflection flame-retardant resin layer has stronger reflection rate by utilizing a structure formed by dispersing the reflection inorganic filler in the thermoplastic resin material, so that the high-reflection flame-retardant resin layer can better replace the existing toughened glass backboard for use; the weather-resistant layer is used as a surface layer structure of the back plate, and the weather resistance and the wear resistance of the whole back plate structure are enhanced by mainly utilizing the characteristics of weather-resistant materials, so that the service life of the back plate structure is ensured.
As mentioned above, the present invention can be realized well, and the above embodiments are only preferred embodiments of the present invention, and are not intended to limit the scope of the present invention; all equivalent changes and modifications made according to the present disclosure are intended to be covered by the scope of the claims of the present invention.
Claims (10)
1. A high-strength weather-resistant packaging plate for a photovoltaic cell is characterized by comprising an ultraviolet-resistant fluorine film layer, an adhesive film layer and a transparent resin layer which are sequentially connected;
wherein, the raw materials for preparing the ultraviolet resistant fluorine film layer mainly comprise fluoroplastic and an ultraviolet resistant agent; the transparent resin layer is made of high-strength thermoplastic transparent resin material.
2. The high-strength weather-resistant packaging plate for the photovoltaic cell as claimed in claim 1, wherein when the ultraviolet-resistant fluorine film layer is manufactured, the main raw materials comprise: 98-99.8 parts of fluoroplastic and 0.2-2 parts of anti-ultraviolet agent.
3. The high-strength weather-resistant packaging plate for the photovoltaic cell as claimed in claim 1, wherein one side or both sides of the ultraviolet-resistant fluorine film layer are further provided with a fluorine plastic layer, and the fluorine plastic layer is mainly made of fluorine plastic; the ultraviolet resistant fluorine film layer and the fluoroplastic layer are formed in a co-extrusion mode.
4. The high-strength weather-resistant packaging plate for the photovoltaic cell as claimed in claim 1 or 3, wherein the ultraviolet-resistant fluorine film layer is subjected to uniaxial stretching or biaxial stretching after being extruded and molded;
or the ultraviolet resistant fluorine film layer and the fluoroplastic layer are co-extruded and formed and then are subjected to unidirectional stretching or bidirectional stretching.
5. The high-strength weather-resistant encapsulating plate for the photovoltaic cell as recited in claim 1 or 3, wherein the thickness of the ultraviolet-resistant fluorine film layer is 10-50 μm; or the total thickness of the ultraviolet resistant fluorine film layer and the fluoroplastic layer is 10-50 μm.
6. The high-strength weather-resistant packaging plate for the photovoltaic cell as claimed in claim 1, wherein the transparent resin layer is made of a mixture of one or more of PCTG, PCTA, PC, COC, COP and TPX.
7. The high-strength weather-resistant packaging plate for the photovoltaic cell as claimed in claim 1, wherein a flame retardant is further added to the raw materials for manufacturing the transparent resin layer;
or a flame retardant and an anti-ultraviolet agent are also added;
or adding flame retardant, uvioresistant agent and color master batch.
8. The high-strength weather-resistant encapsulating plate for the photovoltaic cell as recited in claim 1, wherein the thickness of the transparent resin layer is 0.2 to 1.5mm;
and adding corona treatment, nano coating or frosting treatment on the surface of the transparent resin layer connected with the adhesive film layer.
9. The high-strength weather-resistant packaging plate for the photovoltaic cell as claimed in claim 1, wherein the adhesive layer is a hot-melt adhesive layer or an adhesive layer; the film layer is also added with an anti-ultraviolet agent.
10. A photovoltaic cell assembly is characterized by comprising a front plate, a first adhesive film layer, a cell piece, a second adhesive film layer and a back plate which are sequentially connected;
wherein the front plate is the high-strength weather-proof packaging plate as defined in any one of claims 1 to 9;
or, the front plate and the back plate both adopt the high-strength weather-proof packaging plate as claimed in any one of claims 1 to 9.
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| CN202211324169.3A CN115621332A (en) | 2022-10-27 | 2022-10-27 | High-strength weather-resistant packaging plate for photovoltaic cell and photovoltaic cell assembly |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116190477A (en) * | 2023-04-17 | 2023-05-30 | 晶科能源(海宁)有限公司 | Ultraviolet-resistant photovoltaic module |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116190477A (en) * | 2023-04-17 | 2023-05-30 | 晶科能源(海宁)有限公司 | Ultraviolet-resistant photovoltaic module |
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