CN102642364B - A kind of solar cell backboard and production method thereof - Google Patents
A kind of solar cell backboard and production method thereof Download PDFInfo
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- CN102642364B CN102642364B CN201210122305.0A CN201210122305A CN102642364B CN 102642364 B CN102642364 B CN 102642364B CN 201210122305 A CN201210122305 A CN 201210122305A CN 102642364 B CN102642364 B CN 102642364B
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Abstract
The invention provides a kind of solar cell backboard, the weathering layer including basic unit, being compound in described basic unit side and the coating being compound in described basic unit opposite side, described basic unit is obtained by polyolefin crosslinking curing under curing accelerator effect.The production method that the invention provides a kind of solar cell backboard is by polyolefin and curing accelerator film-forming, obtains solar cell backboard after carrying out crosslinking Treatment.The solar cell backboard of the present invention has good ageing resistace and chemical stability, it is not susceptible to hydrolysis and is not easy to degraded, thus ensure that the solar cell backboard obtained is the most easy to crack, remain good insulating properties and wet and heat ageing resistant performance, reduce the risk of component failures.The performance test results shows, solar cell backboard prepared by the present invention exposes 2000h under the conditions of ultraviolet to the open air, and rupture strength retention is more than 70%；2000h in accelerated ageing environment, rupture strength retention is more than 80%.
Description
Technical field
The present invention relates to technical field of solar batteries, particularly to solar cell backboard and production method thereof.
Background technology
Solar energy is the regenerative resource that the mankind are inexhaustible. also it is clean energy resource, do not produces and appoint
What environmental pollution.Central effectively utilizing of solar energy, big sun can solar photovoltaic utilization be to develop in the last few years
Hurry up, most active research field, is one of project of wherein attracting most attention.To this end, people develop and open
Send out solaode.Crystal silicon solar batteries is to develop the most ripe solaode at present, in the application
Occupy leading position.
Typical crystal silicon solar batteries assembly includes: glass, solar battery sheet, packaging adhesive film and the sun
Can battery back-sheet.Wherein, the Main Function of solar cell backboard is to improve the entirety of solar panel by force
Degree, additionally can intercept steam, prevent steam from penetrating in sealant, affect the service life of cell piece.
Therefore solar cell backboard has insulation, the characteristic such as ageing-resistant, water-fast and corrosion-resistant.
In the crystal silicon solar batteries backboard of current business, mainly there is Tedlar film/poly terephthalic acid second
Diol ester film/Tedlar film sandwich diaphragm, Kynoar (PVDF)/polyethylene terephthalate/
Kynoar sandwich diaphragm, Tedlar film/polyethylene terephthalate film/ethene-vinyl acetate copolymerization
Thing sandwich diaphragm, Kynoar/polyethylene terephthalate film/ethylene-vinyl acetate copolymer three
Layer composite membrane, fluorine coating/polyethylene terephthalate film/fluorine coating, fluorine coating/poly terephthalic acid second two
Alcohol ester film/ethylene-vinyl acetate copolymer film.All employ polyester film in these structures particularly poly-to benzene two
Formic acid glycol ester (PET), polyester film insulating properties, water vapor rejection performance and machinery to solar energy backboard
Performance plays Main Function.But, polyester film particularly polyethylene terephthalate, owing to main chain is tied
Structure exists hydrolyzable ester bond, in use can be degraded by the moisture effect in environment, this
Degradation behavior can be accelerated in sour environment and alkaline environment.The hydrolysis of polyester film can cause its insulating properties
With the decline of mechanical performance, make polyester film become fragile and easily ftracture and make water vapor rejection performance decline, thus reduce
The insulation of backboard, water vapor rejection and mechanical performance, increase the risk of component failures.
Summary of the invention
Present invention solves the technical problem that and be to provide a kind of solar cell backboard, there is good insulating properties
Can, outstanding mechanical performance and wet and heat ageing resistant performance, component failures risk is low.
The invention provides a kind of solar cell backboard, including basic unit, be compound in the resistance to of described basic unit side
Wait layer and be compound in the coating of described basic unit opposite side, described basic unit by polyolefin under curing accelerator effect
Crosslinking curing obtains.
Preferably, in described basic unit, described polyolefin is polyethylene, polypropylene, ethylene propylene diene rubber or second
One or more in third rubber.
Preferably, one or more during described basic unit also includes antioxidant, hindered amine or additive.
Preferably, described curing accelerator is containing 2 and the ester of above unsaturated group, ether or ketone.
Preferably, described coating is fluoropolymer, ethylene-vinyl acetate copolymer or polyolefin.
Preferably, described weathering layer is fluorine material.
Present invention also offers the production method of a kind of solar cell backboard, comprise the following steps:
By polyolefin and curing accelerator film-forming, after carrying out crosslinking Treatment, obtain solar cell backboard.
Preferably, described crosslinking Treatment is peroxide chemical crosslinking, silane chemistries crosslinking or cross-linking radiation.
Preferably, the high-energy ray of described cross-linking radiation is ultraviolet, electron beam, neutron beam or gamma-rays.
Preferably, the irradiation dose of described cross-linking radiation is 10～50Mrad.
Compared with prior art, the solar cell backboard of the present invention includes basic unit, is compound in described basic unit side
Weathering layer and be compound in the coating of described basic unit opposite side, described basic unit is made at curing accelerator by polyolefin
Obtain with lower crosslinking curing.Polyolefin itself has good insulating properties, cross-links under curing accelerator effect
After solidification, the cross-linked polyolefin obtained has good ageing resistace and chemical stability, is not susceptible to water
Solution is not easy to be affected by moisture in environment and degrade, thus ensure that the solar cell backboard obtained not
Easy to crack, remain good insulating properties and wet and heat ageing resistant performance, reduce the risk of component failures.
The performance test results shows, solar cell backboard prepared by the present invention exposes 2000h under the conditions of ultraviolet to the open air,
Rupture strength retention is more than 70%；Being placed on temperature is 85 DEG C, and relative humidity is the accelerated ageing ring of 85%
2000h in border, rupture strength retention is more than 80%.
Detailed description of the invention
In order to be further appreciated by the present invention, below in conjunction with embodiment, the preferred embodiment of the invention is described,
It is understood that these describe simply for further illustrating the features and advantages of the present invention rather than to this
The restriction of invention claim.
The embodiment of the invention discloses a kind of solar cell backboard, including basic unit, be compound in described basic unit one
The weathering layer of side and be compound in the coating of described basic unit opposite side, described basic unit by polyolefin at curing accelerator
The lower crosslinking curing of effect obtains.
In described basic unit, described polyolefin can be a kind of polyolefin, it is also possible to be multiple polyolefinic mixed
One or more in compound, preferably polyethylene, polypropylene, ethylene propylene diene rubber or EP rubbers.Institute
Stating basic unit to be obtained by polyolefin crosslinking curing under curing accelerator effect, described curing accelerator can be to promote
Enter the single accelerator in the range of agent or enhancer compositions, be preferably containing 2 and above unsaturated group
Ester, ether or the ketone of group, such as cyanurate, isocyanuric acid ester, phosphate ester, aliphatic or aromatic oxide or benzene three
The allyl ester of carboxylic acid, is specifically as follows cyanuric acid tripropylene (TAC), iso-cyanuric acid triallyl ester
(TAIC), triallyl phosphate ester, triallyl orthoformate, pentaerythritol tetracrylate, tetrapropylene
Acid dihydroxy methylpropane ester or partially benzene triallyl ester.The quality of described curing accelerator accounts for described polyene hydrocarbonaceous
The 0.1～2.5wt% of amount.The promotion that act as of described curing accelerator cross-links, and improves polyolefinic crosslinking rate
With crosslink density.
In order to make described basic unit have more excellent performance, the most described basic unit also includes antioxidant, is obstructed
One or more in amine or additive.Described hindered amine is preferably 2,2,6,6-tetramethyl piperidine-1-epoxides
(TEMPO) and derivant, the quality of described hindered amine accounts for the 0.1～1.5wt% of described polyolefin quality.
Described hindered amine act as barrier, suppression photoredox or photo aging process, improve anti-ultraviolet ageing
Energy.
Described antioxidant can be single aromatic amine antioxidant, Hinered phenols antioxidant or auxiliary antioxidant,
As diphenylamines, p-phenylenediamine, dihydroquinoline, 2, tri-grades of butyl-4-methylphenols of 6-, double (3,5-tri-grades of fourths
Base-4-hydroxy phenyl) thioether, four (β-(3,5-tri-grades of butyl-4-hydroxy phenyls) propanoic acid) pentaerythritol ester,
Three monooctyl esters, three the last of the ten Heavenly stems ester, double Lauryl Alcohol ester, double ten four carbon alcohols esters, three (2,4-di-tert-butyl-phenyl) sub-
Phosphate ester or double octadecanol ester.The quality of described antioxidant accounts for the 0.1-1.5wt% of described polyolefin quality.Institute
That states antioxidant act as raising polyolefin processing and long-term ageing resistace.
Described additive can be a kind of additive, it is also possible to for the compositions of multiple additives, including but not
It is limited to UV absorbent, pigment, dyestuff, filler, fire retardant or processing aid.The matter of described additive
Amount accounts for the 0.01～15wt% of described polyolefin quality.
In the present invention, being compounded with weathering layer in the side of described basic unit, described weathering layer is as solar-electricity
The outer layer of pond backboard, can improve the performance of solar cell backboard；Described weathering layer is preferably fluorine material,
Described fluorine material is not particularly limited by the present invention, can be a kind of, it is also possible to for multiple mixture,
Be preferably polyvinyl fluoride (PVF), Kynoar (PVDF), the copolymer (EFTE) of tetrafluoroethene and ethylene,
Tetrafluoroethene and vinyl esters or the copolymer of vinyl ethers, CTFE and vinyl esters or vinyl ethers
Copolymer or perfluoroethylene-propylene (FEP) in one or more.Described fluorine material can also add
Various additive well known to those skilled in the art, described additive includes pigment, UV absorbers, dye
Material, filler, antioxidant, processing aid or cross-linking agent.
The present invention is also compounded with coating at the opposite side of described basic unit, and described coating is as solar cell backboard
Internal layer improve its performance；Described coating is preferably fluoropolymer, ethylene-vinyl acetate copolymer or poly-
Alkene.Described fluoropolymer can be a kind of, it is also possible to is multiple mixture, as polyvinyl fluoride (PVF),
Kynoar (PVDF), tetrafluoroethene and copolymer (EFTE), tetrafluoroethene and the vinyl of ethylene
Ester or the copolymer of vinyl ethers, CTFE and vinyl esters or the copolymer of vinyl ethers or poly-perfluor
One or more in second propylene (FEP).Described fluorine material can also add those skilled in the art ripe
The various additives known, described additive include pigment, UV absorbers, dyestuff, filler, antioxidant,
Processing aid or cross-linking agent.
In the present invention, described polyolefin crosslinking curing under curing accelerator effect is obtained basic unit.Described
Solidification is not particularly limited, can be according to mode well known to those skilled in the art by described polyolefin and solidification
Accelerator prepares film forming, preferably adds one or more in antioxidant, hindered amine and additive；Described friendship
Connection can be chemical crosslinking or cross-linking radiation, preferably peroxide chemical crosslinking, silane chemistries crosslinking or spoke
According to crosslinking, more preferably cross-linking radiation.The thickness of described basic unit is preferably 50 μm～500 μm, more preferably
100 μm～300 μm.
Present invention also offers the production method of a kind of solar cell backboard, comprise the following steps:
By polyolefin and curing accelerator film-forming, after carrying out crosslinking Treatment, obtain solar cell backboard.
The present invention is with polyolefin as raw material, and described polyolefin can be a kind of polyolefin, it is also possible to be multiple poly-
One in the mixture of alkene, preferably polyethylene, polypropylene, ethylene propylene diene rubber or EP rubbers or
Multiple.
In the present invention, the single accelerator in the range of described curing accelerator can be accelerator or accelerator
Compositions, is preferably containing 2 and the ester of above unsaturated group, ether or ketone, such as cyanurate, different
Cyanurate, phosphate ester, aliphatic or aromatic oxide or the allyl ester of benzene tricarbonic acid, be specifically as follows melamine
Acid three propylenes (TAC), iso-cyanuric acid triallyl ester (TAIC), triallyl phosphate ester, triolefin
Propyl group orthoformate, pentaerythritol tetracrylate, tetrapropylene acid dihydroxy methylpropane ester or inclined benzene three allyl
Base ester.The quality of described curing accelerator accounts for the 0.1～2.5wt% of described polyolefin quality.Described solidification promotes
The promotion that act as of agent cross-links, and improves polyolefinic crosslinking rate and crosslink density.
In order to make described basic unit have more excellent performance, the most described basic unit also includes antioxidant, is obstructed
One or more in amine or additive.Described hindered amine is preferably 2,2,6,6-tetramethyl piperidine-1-epoxides
(TEMPO) and derivant, the quality of described hindered amine accounts for the 0.1～1.5wt% of described polyolefin quality.
Described hindered amine act as barrier, suppression photoredox or photo aging process, improve anti-ultraviolet ageing
Energy.
Described antioxidant can be single aromatic amine antioxidant, Hinered phenols antioxidant or auxiliary antioxidant,
As diphenylamines, p-phenylenediamine, dihydroquinoline, 2, tri-grades of butyl-4-methylphenols of 6-, double (3,5-tri-grades of fourths
Base-4-hydroxy phenyl) thioether, four (β-(3,5-tri-grades of butyl-4-hydroxy phenyls) propanoic acid) pentaerythritol ester,
Three monooctyl esters, three the last of the ten Heavenly stems ester, double Lauryl Alcohol ester, double ten four carbon alcohols esters, three (2,4-di-tert-butyl-phenyl) sub-
Phosphate ester or double octadecanol ester.The quality of described antioxidant accounts for the 0.1-1.5wt% of described polyolefin quality.Institute
That states antioxidant act as raising polyolefin processing and long-term ageing resistace.
Described additive can be a kind of additive, it is also possible to for the compositions of multiple additives, including but not
It is limited to UV absorbent, pigment, dyestuff, filler, fire retardant or processing aid.The matter of described additive
Amount accounts for the 0.01～15wt% of described polyolefin quality.
The present invention, by polyolefin and curing accelerator film-forming, preferably adds antioxidant, hindered amine or interpolation
One or more in agent, the present invention does not has special limit to by the method for the mixing of above-mentioned each raw material film-forming
System, can be carried out according to mode well known to those skilled in the art, as used extruder extrude and stretch film forming.
After above-mentioned raw materials film-forming, the film obtained is carried out crosslinking Treatment.In the present invention, described friendship
It can be chemical crosslinking or cross-linking radiation that connection processes, and preferably peroxide chemical crosslinking, silane chemistries are handed over
Connection or cross-linking radiation, more preferably cross-linking radiation.
Cross-linking radiation is to utilize high-energy ray ionization or excite polymer, generates macromole free radical, carries out certainly
Reacted by base, finally make linear polymer become the reaction of the polymer with spacial framework.Use spoke
According to crosslinking produce solar cell backboard method particularly as follows: by polyolefin, curing accelerator, antioxidant,
The film that hindered amine and additive solidify to form, uses high-energy ray that described film is carried out cross-linking radiation process,
Preferably it is illuminated with the speed of 10～30 ms/min to film described in solar cell backboard；Described high-energy ray is excellent
Elect ultraviolet light, electron beam, neutron beam or gamma-rays, more preferably electron beam as；The dosage of described irradiation is excellent
Elect 10～50Mrad as.
Peroxide chemical crosslinking is that the free radical utilizing cross-linking agent heat resolve to produce causes macromolecules cross-linking anti-
Should, described cross-linking agent is peroxide.In solar cell backboard production process of the present invention, use peroxidating
Thing chemical crosslinking time when film-forming add peroxide, particularly as follows: by polyolefin, curing accelerator,
The film formed with peroxide cure, carries out crosslinking Treatment in thermal source, obtains solar cell backboard.This
The mode to film-forming of inventing does not has particular/special requirement, can enter according to method well known to those skilled in the art
OK.Described thermal source is preferably saturated vapor or hot inert gas.
Silane chemistries crosslinking is to cross-link between macromole with silane for grafting agent, and silane chemistries crosslinking is poly-
Alkene includes grafting and two processes of crosslinking, in grafting process, the free radical that polymer is pyrolyzed at initiator
Lose hydrogen atom under effect and on main chain, produce free radical, this free radical and silane reaction, there is chain simultaneously
Transfer, it is achieved grafting；Cross-linking after film-forming, the polymer being grafted is at water and crosslinking catalyst
Form silanol under effect, and then realize crosslinked polymer.In solar cell backboard production process of the present invention,
Grafting agent, initiator and crosslinking catalyst is added when film-forming when using silane chemistries crosslinking, particularly as follows:
By polyolefin, curing accelerator, initiator, silane and crosslinking catalyst film-forming, carry out in the hot water
Crosslinking Treatment, obtains solar cell backboard.The present invention does not has particular/special requirement to the mode of film-forming, can
To carry out according to method well known to those skilled in the art.Described initiator can be peroxide, is preferably
Cumyl peroxide or dibenzoyl peroxide.Described crosslinking catalyst is preferably dibutyl tin laurate
Deng organic tin derivates.
In the present invention, being compounded with weathering layer in the side of described basic unit, described weathering layer is as solar-electricity
The outer layer of pond backboard, can improve the performance of solar cell backboard；Described weathering layer is preferably fluorine material,
Described fluorine material is not particularly limited by the present invention, can be a kind of, it is also possible to for multiple mixture,
Be preferably polyvinyl fluoride (PVF), Kynoar (PVDF), the copolymer (EFTE) of tetrafluoroethene and ethylene,
Tetrafluoroethene and vinyl esters or the copolymer of vinyl ethers, CTFE and vinyl esters or vinyl ethers
Copolymer or perfluoroethylene-propylene (FEP) in one or more.Described fluorine material can also add
Various additive well known to those skilled in the art, described additive includes pigment, UV absorbers, dye
Material, filler, antioxidant, processing aid or cross-linking agent.
Described weathering layer can in the form of a film, by adhesives to described basic unit.The present invention couple
Binding agent is not particularly limited, and can be polyurethane binder, epobond epoxyn, acrylate adhesion
Polyurethane binder of agent, preferably bi-component；The bonding mode of binding agent is not particularly limited by the present invention,
By combination process, weathering layer can be bonded in described basic unit according to mode well known to those skilled in the art,
Preferred dry combination process.The present invention does not has particular/special requirement to the thickness of binding agent, can be according to this area skill
Mode known to art is carried out.Described weathering layer can also directly be coated on described basic unit as a solution
On, then dry and remove solvent, obtain being compounded with the basic unit of described weathering layer.
The present invention is also compounded with coating at the opposite side of described basic unit, and described coating is as solar cell backboard
Internal layer improve its performance；Described coating is preferably fluoropolymer, ethylene-vinyl acetate copolymer or poly-
Alkene.Described fluoropolymer can be a kind of, it is also possible to is multiple mixture, as polyvinyl fluoride (PVF),
Kynoar (PVDF), tetrafluoroethene and copolymer (EFTE), tetrafluoroethene and the vinyl of ethylene
Ester or the copolymer of vinyl ethers, CTFE and vinyl esters or the copolymer of vinyl ethers or poly-perfluor
One or more in second propylene (FEP).Described fluorine material can also add those skilled in the art ripe
The various additives known, described additive include pigment, UV absorbers, dyestuff, filler, antioxidant,
Processing aid or cross-linking agent.
Described coating can in the form of a film, by adhesives to described basic unit.The present invention is to viscous
Knot agent is not particularly limited, and can be polyurethane binder, epobond epoxyn, acrylic ester adhesive,
It is preferably polyurethane binder of bi-component；The bonding mode of binding agent is not particularly limited by the present invention, can
According to mode well known to those skilled in the art by combination process by coated adhesive to described basic unit, preferably
Dry-lamination process.The present invention does not has particular/special requirement to the thickness of binding agent, can be ripe according to art technology
The mode known is carried out.Described coating can also directly be coated in described basic unit, so as a solution
Post-drying removes solvent, obtains being compounded with the basic unit of described coating.
The solar cell backboard prepared according to the inventive method is carried out shelf depreciation test, and result shows,
Solar cell backboard prepared by the present invention has good insulating properties.
The solar cell backboard prepared according to the inventive method is exposed to ultraviolet and irradiates lower 2000h, result
Showing, the rupture strength retention of solar cell backboard prepared by the present invention is more than 70%, backboard each layer material
Material does not ftractures, it can be seen that, the solar cell backboard of invention preparation has outstanding mechanical performance.
Being 85 DEG C by the solar cell backboard prepared according to the inventive method in temperature, relative humidity is 85%
Accelerated ageing environment in place more than 1000h, every 500h check backboard elongation at break conservation rate,
Result shows, the solar cell backboard extension at break conservation rate placing 2000h in accelerated ageing environment is big
In 80%, it can be seen that, solar cell backboard prepared by the present invention is the most easy to crack, has outstanding moisture-resisting
Heat aging performance, reduces the risk of component failures.
In order to be further appreciated by the present invention, the solar cell backboard present invention provided below in conjunction with embodiment
And preparation method thereof illustrate, protection scope of the present invention is not limited by the following examples.
The linear low density of polyethylene resin model used in following example is 1004YB and ethylene-propylene-diene monomer
Glue-type number is Vistalon 1703P, is purchased from ExxonMobil Chemical；Iso-cyanuric acid triallyl ester is purchased from
Yantai Heng Nuo Chemical Co., Ltd.；Antioxidant 1010, antioxidant 1076, hindered amine 123 and hindered amine 622
Purchased from Ciba Specialty Chemicals；Two component polyurethane glue host model is TAKELAC A511, firming agent model
For TAKENATE A50, it is purchased from Japan's military field pharmaceutical industries；Pvdf membrane is purchased from France A Kema；PET
Membranous type number is CY25R, purchased from Changzhou Yu Xing insulating material factory；PET film model is DS10, purchased from Sichuan
East insulant；Tedlar film is purchased from E.I.Du Pont Company.
Embodiment 1
By the linear low density of polyethylene resin of 100 mass parts, the iso-cyanuric acid triallyl ester of 1 mass parts,
0.2 mass parts antioxidant 1010,0.2 mass parts hindered amine 622 mix homogeneously in high-speed kneading machine, then
The film of 250 μm it is drawn into through double screw extruder extrusion.Then electron beam is carried out by the speed of 20 ms/min
Cross-linking radiation, its irradiation dose is 10Mrad, forms the polyethylene film of crosslinking.
On the polyethylene film both sides of crosslinking are compound by dry-lamination process, the Tedlar film of 25 μm, used glutinous
Mixture is two component polyurethane glue, and the thickness of adhesive layer is about every layer of 10 μm, obtains solar battery back
Plate.
The solar cell backboard of preparation is carried out shelf depreciation test, and result sees table 1.
The solar cell backboard of preparation is exposed to ultraviolet and irradiates lower 2000h, the fracture strength of described backboard
Conservation rate is more than 70%, and backboard layers of material does not ftractures.
Being 85 DEG C by the solar cell backboard of preparation in temperature, relative humidity is the accelerated ageing environment of 85%
Middle placement more than 1000h, checks the elongation at break conservation rate of backboard every 500h, and result sees table 2.
Embodiment 2
By the ethylene propylene diene rubber of 100 mass parts, 0.1 mass parts iso-cyanuric acid triallyl ester, 0.1 matter
Amount part antioxidant 1076,0.4 mass parts hindered amine 123 mix homogeneously in high-speed kneading machine, then through double spiral shells
Bar extruder extrusion is drawn into the film of 100 μm.Then electron beam irradiation friendship is carried out by the speed of 20 ms/min
Connection, its irradiation dose is 20Mrad, forms the ethylene-propylene-diene monomer glued membrane of crosslinking.
The pvdf membrane of 25 μm on the ethylene-propylene-diene monomer glued membrane both sides of crosslinking are compound by dry-lamination process,
Adhesive used is two component polyurethane glue, and the thickness of adhesive layer is about every layer of 10 μm, obtains solar energy
Battery back-sheet.
The solar cell backboard of preparation is carried out shelf depreciation test, and result sees table 1.
The solar cell backboard of preparation is exposed to ultraviolet and irradiates lower 2000h, the fracture strength of described backboard
Conservation rate is more than 70%, and backboard layers of material does not ftractures.
Being 85 DEG C by the solar cell backboard of preparation in temperature, relative humidity is the accelerated ageing environment of 85%
Middle placement more than 1000h, checks the elongation at break conservation rate of backboard every 500h, and result sees table 2.
Embodiment 3
By 100 mass parts ethylene propylene diene rubbers, 0.5 mass parts hindered amine 123 mixes all in high-speed kneading machine
Even, the film of 400 μm then it is drawn into through double screw extruder extrusion.Then enter by the speed of 20 ms/min
Row electron beam irradiation cross-links, and its irradiation dose is 30Mrad, forms the ethylene-propylene-diene monomer glued membrane of crosslinking.
The pvdf membrane of 25 μm on the ethylene-propylene-diene monomer glued membrane both sides of crosslinking are compound by dry-lamination process,
Adhesive used is two component polyurethane glue, and the thickness of adhesive layer is about every layer of 10 μm, obtains solar energy
Battery back-sheet.
The solar cell backboard of preparation is carried out shelf depreciation test, and result sees table 1.
The solar cell backboard of preparation is exposed to ultraviolet and irradiates lower 2000h, the fracture strength of described backboard
Conservation rate is more than 70%, and backboard layers of material does not ftractures.
Being 85 DEG C by the solar cell backboard of preparation in temperature, relative humidity is the accelerated ageing environment of 85%
Middle placement more than 1000h, checks the elongation at break conservation rate of backboard every 500h, and result sees table 2.
Comparative example 1
On the PET film both sides of 250 μm are compound by dry-lamination process, the Tedlar film of 25 μm, used
Adhesive is two component polyurethane glue, and the thickness of adhesive layer is about every layer of 10 μm, obtains solaode
Backboard.
The solar cell backboard of preparation is carried out shelf depreciation test, and result sees table 1.
The solar cell backboard of preparation is exposed to ultraviolet and irradiates lower 2000h, the fracture strength of described backboard
Conservation rate is 70%, and backboard layers of material does not ftractures.
Being 85 DEG C by the solar cell backboard of preparation in temperature, relative humidity is the accelerated ageing environment of 85%
Middle placement more than 1000h, checks the elongation at break conservation rate of backboard every 500h, and result sees table 2.
Comparative example 2
On the PET film both sides of 250 μm are compound by dry-lamination process, the pvdf membrane of 25 μm, used
Adhesive is two component polyurethane glue, and the thickness of adhesive layer is about every layer of 10 μm, obtains solaode
Backboard.
The solar cell backboard of preparation is carried out shelf depreciation test, and result sees table 1.
The solar cell backboard of preparation is exposed to ultraviolet and irradiates lower 2000h, the fracture strength of described backboard
Conservation rate is 70%, and backboard layers of material does not ftractures.
Being 85 DEG C by the solar cell backboard of preparation in temperature, relative humidity is the accelerated ageing environment of 85%
Middle placement more than 1000h, checks the elongation at break conservation rate of backboard every 500h, and result sees table 2.
Partial discharge extinction voltage's result of the solar cell backboard that table 1 embodiment and comparative example provide
From table 1, the insulating properties of the solar cell backboard of embodiment 1～3 preparation and comparative example 1～2
The solar cell backboard of preparation is suitable.
The solar cell backboard that table 2 embodiment and comparative example provide fracture storage rate under accelerated ageing conditions
From table 2, the solar cell backboard of embodiment 1～3 preparation under accelerated ageing environmental condition,
Fracture storage rate during 2000h still can reach more than 80%, hence it is evident that than the solar energy of comparative example 1～2 preparation
Battery back-sheet wet and heat ageing resistant.
Therefore, Tedlar film/PET film that the solar cell backboard that prepared by the present invention is prepared with comparative example 1～2
/ Tedlar film composite back plate and pvdf membrane/PET film/pvdf membrane composite back plate have suitable insulating properties,
And solar cell backboard prepared by the present invention has more excellent mechanical performance and wet and heat ageing resistant performance,
Reduce the risk of component failures.
The explanation of above example is only intended to help to understand method and the core concept thereof of the present invention.Should refer to
Go out, for those skilled in the art, under the premise without departing from the principles of the invention, also
The present invention can be carried out some improvement and modification, these improve and modify and also fall into the claims in the present invention
In protection domain.
Described above to the disclosed embodiments, makes professional and technical personnel in the field be capable of or uses this
Invention.Multiple amendment to these embodiments will be apparent from for those skilled in the art,
Generic principles defined herein can without departing from the spirit or scope of the present invention, at other
Embodiment realizes.Therefore, the present invention is not intended to be limited to the embodiments shown herein, and is intended to
Meet the widest scope consistent with principles disclosed herein and features of novelty.
Claims (5)
1. a solar cell backboard, the weathering layer and the coating being compound in described basic unit opposite side that by basic unit, are compound in described basic unit side form, and described basic unit by polyolefin, is processed crosslinking curing by cross-linking radiation and obtains under curing accelerator effect；
Described polyolefin is one or more in linear low density of polyethylene or ethylene propylene diene rubber；
Described weathering layer is polyvinyl fluoride (PVF), Kynoar (PVDF), tetrafluoroethene and the copolymer (EFTE) of ethylene, tetrafluoroethene and vinyl esters or the copolymer of vinyl ethers, CTFE and one or more in vinyl esters or the copolymer of vinyl ethers or perfluoroethylene-propylene (FEP)；
Described coating is fluoropolymer, ethylene-vinyl acetate copolymer or polyolefin；
Described curing accelerator is cyanurate, isocyanuric acid ester, phosphate ester, aliphatic olefin propyl ester, aromatic oxide allyl ester or benzene tricarbonic acid's allyl ester.
Solar cell backboard the most according to claim 1, it is characterised in that described basic unit also includes one or more in antioxidant, hindered amine or additive.
3. a production method for solar cell backboard as claimed in claim 1, comprises the following steps:
By polyolefin and curing accelerator film-forming, after carrying out cross-linking radiation process, obtain solar cell backboard.
Production method the most according to claim 3, it is characterised in that the high-energy ray of described cross-linking radiation is ultraviolet, electron beam, neutron beam or gamma-rays.
5. according to the production method described in claim 3 ~ 4 any one, it is characterised in that the irradiation dose of described cross-linking radiation is 10 ~ 50 Mrad.
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| CN103897266B (en) * | 2012-12-28 | 2016-04-20 | 苏州度辰新材料有限公司 | A kind of resin combination for sun power backboard base material |
| CN103606581A (en) * | 2013-11-25 | 2014-02-26 | 云南云天化股份有限公司 | Solar cell backboard, manufacturing method thereof and solar cell |
| CN107204384A (en) * | 2016-03-16 | 2017-09-26 | 上海海优威新材料股份有限公司 | Three layers of integral structure solar cell backboard and preparation method thereof |
| CN106252441A (en) * | 2016-08-31 | 2016-12-21 | 江苏裕康复合材料有限公司 | A kind of photovoltaic component back plate |
| CN109461781B (en) * | 2018-10-15 | 2020-11-13 | 浙江尚越新能源开发有限公司 | Winding type flexible thin film solar module |
| CN112409697B (en) * | 2020-11-06 | 2022-07-08 | 乐凯胶片股份有限公司 | Polyolefin film and manufacturing method thereof, solar cell back plate and solar cell |
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| CN201773848U (en) * | 2010-07-05 | 2011-03-23 | 张美正 | Back board structure of solar panel module |
| EP2617568A1 (en) * | 2010-08-16 | 2013-07-24 | 3M Innovative Properties Company | Polyolefin-based solar backsheet |
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