CN110010716B - Solar photovoltaic cell module back plate - Google Patents

Solar photovoltaic cell module back plate Download PDF

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Publication number
CN110010716B
CN110010716B CN201910178322.8A CN201910178322A CN110010716B CN 110010716 B CN110010716 B CN 110010716B CN 201910178322 A CN201910178322 A CN 201910178322A CN 110010716 B CN110010716 B CN 110010716B
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parts
layer
atmosphere
cell module
photovoltaic cell
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CN110010716A (en
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丁律
黄欢
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Changzhou Huitian New Materials Co Ltd
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Changzhou Huitian New Materials Co Ltd
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/04—Homopolymers or copolymers of ethene
    • C08L23/08—Copolymers of ethene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L25/00—Compositions of, homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Compositions of derivatives of such polymers
    • C08L25/02—Homopolymers or copolymers of hydrocarbons
    • C08L25/04—Homopolymers or copolymers of styrene
    • C08L25/06—Polystyrene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L45/00—Compositions of homopolymers or copolymers of compounds having no unsaturated aliphatic radicals in side chain, and having one or more carbon-to-carbon double bonds in a carbocyclic or in a heterocyclic ring system; Compositions of derivatives of such polymers
    • 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
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
    • C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
    • 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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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Electromagnetism (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Power Engineering (AREA)
  • Laminated Bodies (AREA)
  • Photovoltaic Devices (AREA)

Abstract

The invention relates to the technical field of solar energy, in particular to a solar photovoltaic cell module back plate. The solar photovoltaic cell module back plate comprises an outer layer, a first bonding layer, a PET layer, a second bonding layer and a high-transmittance insulating layer which are sequentially in contact with the atmosphere from top to bottom, has high barrier property, can realize granulation firstly by adding thermoplastic resin, is subjected to secondary granulation particle dissolution and injection molding, adopts a new glue formula, reduces the production cost, and can be processed by using original equipment.

Description

Solar photovoltaic cell module back plate
Technical Field
The invention relates to a back plate, in particular to a back plate of a solar photovoltaic cell module.
Background
The solar cell module consists of a 5-layer structure, photovoltaic glass, high-transparency EVA (ethylene vinyl acetate), a cell piece, ultraviolet high-barrier EVA and a photovoltaic back plate; the photovoltaic backboard is used as a packaging material of the assembly backboard and mainly plays roles of insulation, water vapor barrier, reflection increase and the like.
The conventional solar backboard is formed by compounding multiple layers of materials, taking a most common compound KPE backboard in the market as an example, the structure of the conventional solar backboard is three layers, the outermost layer (air contact surface of the backboard) is PVDF, the middle layer is PET, and the inner layer material (EVA adhesive layer) is a modified polyolefin film. Because the inner layer material of the back plate is directly contacted with the welding strip and the EVA and is required to have good adhesive property with the EVA, the inner layer material is a polyolefin structure. At present, polyurethane adhesives are respectively coated on two surfaces of a PET group diaphragm in most of preparation methods at home and abroad, the polyurethane adhesives at home need to be imported, so that the production cost of the solar backboard is overhigh, and because the polyurethane adhesives are solvent adhesives, a large amount of organic solvents are needed, and the organic solvents cause certain pollution to the environment and have adverse effects on the health of operators. The existing back plate also has the problems of over-high water permeability, poor barrier property, yellowing, cracking, aging and failure.
Disclosure of Invention
The invention aims to solve the defects and provides the solar photovoltaic cell module back plate.
In order to overcome the defects in the background art, the technical scheme adopted by the invention for solving the technical problems is as follows: the solar photovoltaic cell module back plate comprises an outer layer, a first bonding layer, a PET toughness increasing layer, a second bonding layer and a high-transmittance insulating layer which are sequentially contacted with the atmosphere from top to bottom;
the outer layer in contact with the atmosphere consists of the following components in parts by weight:
90-98 parts of cycloolefin copolymer
0-10 parts of thermoplastic resin
0-5 parts of plasticizer
0.1-1 part of ultraviolet absorbent
The PET layer comprises the following components in parts by weight:
80-95 parts of polystyrene
0-15 parts of engineering plastic
1-5 parts of light stabilizer
0.1-2 parts of filler;
the high-transmittance insulating layer comprises the following components in parts by weight:
50-95 parts of copolymerized polyethylene
30-80 parts of silane grafted polyethylene
0 to 30 parts of polyolefin resin
2-5 parts of functional filler
0.1-2 parts of antioxidant.
According to another embodiment of the present invention, the adhesive further comprises an adhesive formed by crosslinking the first adhesive layer with a weather-resistant stabilizer, an acrylic resin and a crosslinking catalyst.
According to another embodiment of the present invention, the second adhesive layer further comprises an adhesive formed by crosslinking maleic anhydride grafted polyethylene, acrylic resin and a crosslinking catalyst.
According to another embodiment of the present invention, it is further included that the crosslinking catalyst is one or more of hexamethylenediamine, ethylenediamine, polyethyleneimine, triethylenediamine, isophoronediamine.
According to another embodiment of the present invention, it is further included that the thermoplastic resin in the outer layer in contact with the atmosphere is one or more of polyphenylene sulfide resin, polyethylene resin or polypropylene resin.
According to another embodiment of the present invention, it is further included that the plasticizer in the outer layer in contact with the atmosphere is epoxidized soybean oil and dioctyl phthalate.
According to another embodiment of the invention, it is further included that the filler in the PET layer is one or more of carbon fiber, glass fiber or carbon black.
According to another embodiment of the present invention, further comprising the functional filler in the high-permeability insulating layer is polyamide, methyl methacrylate and crystalline polyester polyol.
According to another embodiment of the present invention, the ultraviolet absorber further comprising the outer layer contacting with the atmosphere is one or more of benzophenones, benzotriazoles, triazines, and substituted acrylonitriles.
The invention has the beneficial effects that: the solar photovoltaic cell module back plate has high barrier property, granulation can be realized firstly by adding thermoplastic resin, injection molding can be realized after granules are dissolved secondarily, a new glue formula is adopted, the production cost is reduced, and the solar photovoltaic cell module back plate can be processed by using original equipment.
Detailed Description
The solar photovoltaic cell module back plate comprises an outer layer, a first bonding layer, a PET layer, a second bonding layer and a high-transmittance insulating layer which are sequentially contacted with the atmosphere from top to bottom;
the outer layer in contact with the atmosphere consists of the following components in parts by weight:
90-98 parts of cycloolefin copolymer
0-10 parts of thermoplastic resin
0-5 parts of plasticizer
0.1-1 part of ultraviolet absorbent
The PET layer comprises the following components in parts by weight:
80-95 parts of polystyrene
0-15 parts of engineering plastic
1-5 parts of light stabilizer
0.1-2 parts of filler;
the high-transmittance insulating layer comprises the following components in parts by weight:
50-95 parts of copolymerized polyethylene
30-80 parts of silane grafted polyethylene
0 to 30 parts of polyolefin resin
2-5 parts of functional filler
0.1-2 parts of antioxidant.
The first bonding layer is an adhesive formed by crosslinking a weather-resistant stabilizer, acrylic resin and a crosslinking catalyst. The adhesive prepared by the structure has the characteristics of heat resistance, moisture resistance and durability, can not be degraded after long-term use, and can not cause the problems of interlayer separation and falling off.
The second adhesive layer is an adhesive formed by crosslinking maleic anhydride grafted polyethylene, acrylic resin and a crosslinking catalyst. The adhesive prepared by the structure has the characteristics of heat resistance, moisture resistance and durability, can not be degraded after long-term use, and can not cause the problems of interlayer separation and falling off.
The crosslinking catalyst is one or more of hexamethylenediamine, ethylenediamine, polyethyleneimine, triethylenediamine and isophoronediamine.
The thermoplastic resin in the outer layer contacting with the atmosphere is one or more of polyphenylene sulfide resin, polyethylene resin or polypropylene resin. The thermoplastic resin has the properties of softening by heating and hardening by cooling, and does not react chemically, and such properties are maintained regardless of the number of times heating and cooling are repeated. Therefore, the process adopts the thermoplastic resin, so that the granulation can be realized firstly, and the granulation particles are dissolved for the second time and then are injected; meanwhile, the powder can be repeatedly crushed and then heated for remodeling, so that recycling is realized.
The plasticizers in the outer layer that contacted the atmosphere were epoxidized soybean oil and dioctyl phthalate.
The filler in the PET layer is one or more of carbon fiber, glass fiber or carbon black. The carbon fiber can increase the toughness of the PET layer and has high bending and compression strength.
The functional filler in the high-permeability insulating layer is polyamide, methyl methacrylate and crystalline polyester polyol.
The ultraviolet absorbent of the outer layer contacting with the atmosphere is one or more of benzophenones, benzotriazoles, triazines and substituted acrylonitrile.
Example one
The solar photovoltaic cell module back plate comprises an outer layer, a first bonding layer, a PET layer, a second bonding layer and a high-transmittance insulating layer which are sequentially contacted with the atmosphere from top to bottom;
the outer layer in contact with the atmosphere consists of the following components in parts by weight:
cycloolefin copolymer 92 parts
Polyphenylene sulfide resin 7 parts
Epoxidized soybean oil 3 parts
1 part of dioctyl phthalate
0.5 part of benzophenone
The PET layer comprises the following components in parts by weight:
85 parts of polystyrene
10 portions of engineering plastic
Light stabilizer 3 parts
0.8 part of carbon fiber;
the high-transmittance insulating layer comprises the following components in parts by weight:
80 portions of copolymerized polyethylene
55 parts of silane grafted polyethylene
Polyolefin resin 25 parts
2 parts of methyl methacrylate
Polyamide 1 part
1 part of crystalline polyester polyol
And 1 part of antioxidant.
The three materials are put into a high-speed mixer according to the formula and are uniformly mixed, then the mixture is put into a double-screw extruder to be mixed and modified to prepare raw materials of respective films, and the PE layer film, the outer layer film and the high-transparency insulating layer film are subjected to tape casting. And coating glue on two surfaces of the PET layer film by corona, and then compounding the PET layer film with the outer layer and the high-permeability insulating layer respectively to obtain the required back plate.
Example two
The solar photovoltaic cell module back plate comprises an outer layer, a first bonding layer, a PET layer, a second bonding layer and a high-transmittance insulating layer which are sequentially contacted with the atmosphere from top to bottom;
the outer layer in contact with the atmosphere consists of the following components in parts by weight:
cycloolefin copolymer 92 parts
Polyethylene resin 5 parts
2 parts of epoxidized soybean oil
2 portions of dioctyl phthalate
Benzotriazole 0.5 part
The PET layer comprises the following components in parts by weight:
89 parts of polystyrene
12 parts of engineering plastic
Light stabilizer 4 parts
2 parts of carbon black;
the high-transmittance insulating layer comprises the following components in parts by weight:
78 parts of copolymerized polyethylene
68 parts of silane grafted polyethylene
Polyolefin resin 18 parts
Polyamide 1 part
2 parts of methyl methacrylate
2 parts of crystalline polyester polyol
1.3 parts of antioxidant.
The three materials are put into a high-speed mixer according to the formula and are uniformly mixed, then the mixture is put into a double-screw extruder to be mixed and modified to prepare raw materials of respective films, and the PET layer film, the outer layer film and the high-transparency insulating layer film are subjected to tape casting. And coating glue on two surfaces of the PET layer film by corona, and then compounding the PET layer film with the outer layer and the high-permeability insulating layer respectively to obtain the required back plate.
EXAMPLE III
The solar photovoltaic cell module back plate comprises an outer layer, a first bonding layer, a PET layer, a second bonding layer and a high-transmittance insulating layer which are sequentially contacted with the atmosphere from top to bottom;
the outer layer in contact with the atmosphere consists of the following components in parts by weight:
cycloolefin copolymer 92 parts
6 parts of polyethylene resin
Epoxidized soybean oil 1 part
2 portions of dioctyl phthalate
0.8 part of substituted acrylonitrile
The PET layer comprises the following components in parts by weight:
88 portions of polystyrene
10 portions of engineering plastic
Light stabilizer 4 parts
2 parts of glass fiber;
the high-transmittance insulating layer comprises the following components in parts by weight:
90 portions of copolymerized polyethylene
55 parts of silane grafted polyethylene
Polyolefin resin 18 parts
Polyamide 1 part
Methyl methacrylate 1 part
1 part of crystalline polyester polyol
1.5 parts of antioxidant.
The three materials are put into a high-speed mixer according to the formula and are uniformly mixed, then the mixture is put into a double-screw extruder to be mixed and modified to prepare raw materials of respective films, and the PET layer film, the outer layer film and the high-transparency insulating layer film are subjected to tape casting. And coating glue on two surfaces of the PET layer film by corona, and then compounding the PET layer film with the outer layer and the high-permeability insulating layer respectively to obtain the required back plate.

Claims (3)

1. The utility model provides a solar photovoltaic cell module backplate which characterized in that: the high-permeability insulating layer is composed of an outer layer, a first bonding layer, a PET layer, a second bonding layer and a high-permeability insulating layer which are contacted with the atmosphere from top to bottom in sequence;
the outer layer in contact with the atmosphere consists of the following components in parts by weight:
90-98 parts of cycloolefin copolymer
0-10 parts of thermoplastic resin
0-5 parts of plasticizer
0.1-1 part of ultraviolet absorbent
The PET layer comprises the following components in parts by weight:
80-95 parts of polystyrene
0-15 parts of engineering plastic
1-5 parts of light stabilizer
0.1-2 parts of filler;
the high-transmittance insulating layer comprises the following components in parts by weight:
50-95 parts of copolymerized polyethylene
30-80 parts of silane grafted polyethylene
0 to 30 parts of polyolefin resin
2-5 parts of functional filler
0.1-2 parts of an antioxidant;
the first bonding layer is an adhesive formed by crosslinking a weather-resistant stabilizer, acrylic resin and a crosslinking catalyst;
the second bonding layer is an adhesive formed by crosslinking maleic anhydride grafted polyethylene, acrylic resin and a crosslinking catalyst,
the thermoplastic resin in the outer layer contacting with the atmosphere is one or more of polyphenylene sulfide resin, polyethylene resin or polypropylene resin,
the plasticizer in the outer layer contacting with the atmosphere is epoxidized soybean oil and dioctyl phthalate,
the ultraviolet absorbent of the outer layer contacting with the atmosphere is one or more of benzophenones, benzotriazoles, triazines and substituted acrylonitrile,
the filler in the PET layer is one or more of carbon fiber, glass fiber or carbon black.
2. The solar photovoltaic cell module backsheet of claim 1, wherein: the crosslinking catalyst is one or more of hexamethylene diamine, ethylenediamine, polyethyleneimine, triethylene diamine and isophorone diamine.
3. The solar photovoltaic cell module backsheet of claim 1, wherein: the functional filler in the high-transmittance insulating layer is polyamide, methyl methacrylate and crystalline polyester polyol.
CN201910178322.8A 2019-03-11 2019-03-11 Solar photovoltaic cell module back plate Active CN110010716B (en)

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CN110010716B true CN110010716B (en) 2021-06-08

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111363394A (en) * 2020-04-13 2020-07-03 常州回天新材料有限公司 Transparent coating for solar photovoltaic cell module
CN111785803A (en) * 2020-06-02 2020-10-16 扬州艾能新能源有限公司 Anti-aging anti-cracking polycrystalline solar cell back plate
CN114701223B (en) * 2022-01-27 2023-11-17 浙江中聚材料有限公司 Solar cell backboard composite film and preparation method thereof
CN114872405B (en) * 2022-04-01 2024-03-08 浙江中聚材料有限公司 Weather-resistant and anti-aging PO photovoltaic backboard and preparation method thereof

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102623531A (en) * 2011-01-30 2012-08-01 苏州尚善新材料科技有限公司 Functional solar cell module backboard and manufacture method thereof
KR101487962B1 (en) * 2013-12-04 2015-01-30 율촌화학 주식회사 Back sheet for solar cell module
CN104494263B (en) * 2014-12-25 2016-08-24 杭州福斯特光伏材料股份有限公司 A kind of high office electric discharge pressure photovoltaic back
CN105336806B (en) * 2015-11-19 2017-04-19 中天光伏材料有限公司 High water resistance solar cell backboard used in 1500V photovoltaic module
CN107984842A (en) * 2017-11-23 2018-05-04 泰州隆基乐叶光伏科技有限公司 A kind of fluorine film, backboard and photovoltaic module
CN108682707B (en) * 2018-06-13 2020-06-09 常州回天新材料有限公司 Transparent back plate of solar photovoltaic cell module for double-sided power generation

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