CN102642364A - Solar rear panel and production method for same - Google Patents
Solar rear panel and production method for same Download PDFInfo
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- CN102642364A CN102642364A CN2012101223050A CN201210122305A CN102642364A CN 102642364 A CN102642364 A CN 102642364A CN 2012101223050 A CN2012101223050 A CN 2012101223050A CN 201210122305 A CN201210122305 A CN 201210122305A CN 102642364 A CN102642364 A CN 102642364A
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- cell backboard
- rear panel
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
Abstract
The invention provides a solar rear panel, which comprises a base layer, a weather-proof layer and a coating layer, wherein the weather-proof layer is compounded on one side of the base layer, the coating layer is composited on the other side of the base layer, and the base layer is obtained by means of cross-linking and curing polyolefin under the action of curing accelerators. The invention further provides a production method for the solar rear panel, and the polyolefin and the curing accelerators are cured into a film and then cross-linked to obtain the solar rear panel. The solar rear panel has fine aging resistance and chemical stability, and is not easy to hydrolyze or degrade, so that the obtained solar rear panel is not easy to crack, fine insulating property, humidity and heat resistance and aging resistance can be constantly kept, and the risk of component failure is reduced. Performance testing results indicate that the breaking strength retention rate of the solar rear panel is higher than 70% when the solar rear panel produced by the production method is exposed in an ultraviolet condition for 2000 hours, and the breaking strength retention rate of the solar rear panel is higher than 80% when the solar rear panel is exposed in an accelerated aging environment for 2000 hours.
Description
Technical field
The present invention relates to technical field of solar batteries, particularly solar cell backboard and production method thereof.
Background technology
Solar energy is human inexhaustible regenerative resource. also is clean energy resource, do not produce any environmental pollution.In the middle of effective utilization of solar energy, big sun can solar photovoltaic utilization be a research field with fastest developing speed in the last few years, most active, is one of project that wherein attracts most attention.For this reason, people develop and have developed solar cell.Crystal silicon solar batteries is to develop the most ripe solar cell at present, in application, occupies leading position.
Typical crystal silicon solar batteries assembly comprises: glass, solar battery sheet, packaging adhesive film and solar cell backboard.Wherein, the main effect of solar cell backboard is the bulk strength that improves solar panel, can intercept steam in addition, prevents water vapor permeable in sealant, influences the service life of battery sheet.Therefore solar cell backboard has insulation, characteristic such as ageing-resistant, water-fast and corrosion-resistant.
In the crystal silicon solar batteries backboard of present commercial usefulness, mainly contain Tedlar film/PETG film/three layers of composite membrane of Tedlar film, Kynoar (PVDF)/three layers of composite membrane of PETG/Kynoar, Tedlar film/three layers of composite membrane of PETG film/ethylene-vinyl acetate copolymer, Kynoar/three layers of composite membrane of PETG film/ethylene-vinyl acetate copolymer, fluorine coating/PETG film/fluorine coating, fluorine coating/PETG film/ethylene-vinyl acetate copolymer film.In these structures, all used particularly PETG (PET) of polyester film, polyester film plays main effect to insulating properties, water vapor rejection performance and the mechanical performance of solar energy backboard.But polyester film is PETG particularly, owing to have hydrolyzable ester bond in the backbone structure, in use can receive the moisture effect in the environment and degrades, and this degradation behavior can quickening in sour environment and alkaline environment.The hydrolysis of polyester film can cause the decline of its insulating properties and mechanical performance, makes polyester film become fragile easy of crack and the water vapor rejection performance is descended, thereby reduce insulation, water vapor rejection and the mechanical performance of backboard, has increased the risk of component failures.
Summary of the invention
The technical problem that the present invention solves is to provide a kind of solar cell backboard, has the good insulation performance performance, outstanding mechanical performance and wet and heat ageing resistant performance, and the component failures risk is low.
The invention provides a kind of solar cell backboard, comprise basic unit, be compound in the weathering layer of said basic unit one side and be compound in the coating of said basic unit opposite side, said basic unit is obtained by polyolefin crosslinking curing under the curing accelerator effect.
Preferably, in the said basic unit, said polyolefin is one or more in polyethylene, polypropylene, ethylene propylene diene rubber or the EP rubbers.
Preferably, said basic unit also comprises one or more in antioxidant, hindered amine or the additive.
Preferably, said curing accelerator is ester, ether or the ketone that contains 2 and above unsaturated group.
Preferably, said coating is fluoropolymer, ethylene-vinyl acetate copolymer or polyolefin.
Preferably, said weathering layer is a fluorine material.
The present invention also provides a kind of production method of solar cell backboard, may further comprise the steps:
With polyolefin and curing accelerator film-forming, carry out obtaining solar cell backboard after the crosslinking Treatment.
Preferably, said crosslinking Treatment is peroxide chemical crosslinking, silane chemical crosslinking or cross-linking radiation.
Preferably, the high-energy ray of said cross-linking radiation is ultraviolet ray, electron beam, neutron beam or gamma-rays.
Preferably, the irradiation dose of said cross-linking radiation is 10～50Mrad.
Compared with prior art, solar cell backboard of the present invention comprises basic unit, be compound in the weathering layer of said basic unit one side and be compound in the coating of said basic unit opposite side, and said basic unit is obtained by polyolefin crosslinking curing under the curing accelerator effect.Itself has good insulation performance property polyolefin; Behind crosslinking curing under the curing accelerator effect; The cross-linked polyolefin that obtains has good ageing resistace and chemical stability, and difficult generation hydrolysis is not vulnerable to the influence of moisture in the environment yet and degrades, thereby has guaranteed that the solar cell backboard that obtains is not easy to crack; Remain good insulation performance performance and wet and heat ageing resistant performance, reduced the risk of component failures.The performance test results shows that the solar cell backboard of the present invention's preparation exposes 2000h under ultraviolet condition to the open air, and the fracture strength conservation rate is greater than 70%; Being placed on temperature is 85 ℃, and relative humidity is 2000h in 85% the accelerated ageing environment, and the fracture strength conservation rate is greater than 80%.
The specific embodiment
In order further to understand the present invention, below in conjunction with embodiment the preferred embodiment of the invention is described, describe just to further specifying feature and advantage of the present invention but should be appreciated that these, rather than to the restriction of claim of the present invention.
The embodiment of the invention discloses a kind of solar cell backboard, comprise basic unit, be compound in the weathering layer of said basic unit one side and be compound in the coating of said basic unit opposite side, said basic unit is obtained by polyolefin crosslinking curing under the curing accelerator effect.
In said basic unit, said polyolefin can be a kind of polyolefin, also can be multiple polyolefinic mixture, is preferably in polyethylene, polypropylene, ethylene propylene diene rubber or the EP rubbers one or more.Said basic unit is obtained by polyolefin crosslinking curing under the curing accelerator effect; Said curing accelerator can be single promoter or the enhancer compositions in the promoter scope; Be preferably the ester, ether or the ketone that contain 2 and above unsaturated group; Like cyanurate, isocyanuric acid ester, phosphate, aliphatic or aromatic oxide or benzene tricarbonic acid's allyl ester, specifically can be cyanuric acid tripropylene (TAC), iso-cyanuric acid triallyl ester (TAIC), triallyl phosphate, triallyl orthoformate, pentaerythritol tetracrylate, tetrapropylene acid dihydroxy methylpropane ester or inclined to one side benzene triallyl ester.The quality of said curing accelerator accounts for 0.1～2.5wt% of said polyolefin quality.It is crosslinked that the acting as of said curing accelerator promotes, improves polyolefinic crosslinking rate and crosslink density.
In order to make said basic unit have more excellent performance, also comprise in antioxidant, hindered amine or the additive one or more in the preferred said basic unit.Said hindered amine is preferably 2,2,6,6-tetramethyl piperidine-1-oxygen base (TEMPO) and derivative thereof, and the quality of said hindered amine accounts for 0.1～1.5wt% of said polyolefin quality.Acting as barrier, suppressing photooxidation reduction or light aging process of said hindered amine improves the anti-ultraviolet ageing performance.
Said antioxidant can be single aromatic amine antioxidant, Hinered phenols antioxidant or auxiliary antioxidant; Like diphenylamines, p-phenylenediamine (PPD), EEDQ, 2; Three grades of butyl of 6--4-methylphenol, two (3; Three grades of butyl of 5--4-hydroxy phenyl) thioether, four (β-(3, three grades of butyl of 5--4-hydroxy phenyl) propionic acid) pentaerythritol ester, three monooctyl esters, three the last of the ten Heavenly stems ester, two 12 carbon alcohol esters, two ten four carbon alcohols esters, three (2, the 4-di-tert-butyl-phenyl) phosphite ester or two octadecanol ester.The quality of said antioxidant accounts for the 0.1-1.5wt% of said polyolefin quality.Acting as of said antioxidant improves polyolefin processing and long-term ageing resistace.
Said additive can be a kind of additive, also can be the composition of multiple additives, includes but not limited to ultra-violet absorber, pigment, dyestuff, filler, fire retardant or processing aid.The quality of said additive accounts for 0.01～15wt% of said polyolefin quality.
In the present invention, be compounded with weathering layer in a side of said basic unit, said weathering layer can improve the performance of solar cell backboard as the skin of solar cell backboard; Said weathering layer is preferably fluorine material; The present invention does not have particular restriction to said fluorine material; Can be for a kind of; Also can be multiple mixture, be preferably the copolymer or in the perfluoroethylene-propylene (FEP) one or more of copolymer, CTFE and vinyl esters or vinyl ethers of copolymer (EFTE), tetrafluoroethene and the vinyl esters or the vinyl ethers of polyvinyl fluoride (PVF), Kynoar (PVDF), tetrafluoroethene and ethene.Can also add various additive well known to those skilled in the art in the said fluorine material, said additive comprises pigment, UV absorbers, dyestuff, filler, antioxidant, processing aid or crosslinking agent.
The present invention also is compounded with coating at the opposite side of said basic unit, and said coating improves its performance as the internal layer of solar cell backboard; Said coating is preferably fluoropolymer, ethylene-vinyl acetate copolymer or polyolefin.Said fluoropolymer can be for a kind of; Also can be multiple mixture, like the copolymer of copolymer, CTFE and the vinyl esters of copolymer (EFTE), tetrafluoroethene and the vinyl esters or the vinyl ethers of polyvinyl fluoride (PVF), Kynoar (PVDF), tetrafluoroethene and ethene or vinyl ethers or in the perfluoroethylene-propylene (FEP) one or more.Can also add various additive well known to those skilled in the art in the said fluorine material, said additive comprises pigment, UV absorbers, dyestuff, filler, antioxidant, processing aid or crosslinking agent.
In the present invention, said polyolefin crosslinking curing under the curing accelerator effect is obtained basic unit.Said curing does not have particular restriction, can said polyolefin and curing accelerator be prepared film forming according to mode well known to those skilled in the art, preferably adds in antioxidant, hindered amine and the additive one or more; Saidly crosslinkedly chemical crosslinking or cross-linking radiation be can be, peroxide chemical crosslinking, silane chemical crosslinking or cross-linking radiation are preferably, more preferably cross-linking radiation.The thickness of said basic unit is preferably 50 μ m～500 μ m, more preferably 100 μ m～300 μ m.
The present invention also provides a kind of production method of solar cell backboard, may further comprise the steps:
With polyolefin and curing accelerator film-forming, carry out obtaining solar cell backboard after the crosslinking Treatment.
The present invention is raw material with the polyolefin, and said polyolefin can be a kind of polyolefin, also can be multiple polyolefinic mixture, is preferably in polyethylene, polypropylene, ethylene propylene diene rubber or the EP rubbers one or more.
In the present invention; Said curing accelerator can be single promoter or the enhancer compositions in the promoter scope; Be preferably the ester, ether or the ketone that contain 2 and above unsaturated group; Like cyanurate, isocyanuric acid ester, phosphate, aliphatic or aromatic oxide or benzene tricarbonic acid's allyl ester, specifically can be cyanuric acid tripropylene (TAC), iso-cyanuric acid triallyl ester (TAIC), triallyl phosphate, triallyl orthoformate, pentaerythritol tetracrylate, tetrapropylene acid dihydroxy methylpropane ester or inclined to one side benzene triallyl ester.The quality of said curing accelerator accounts for 0.1～2.5wt% of said polyolefin quality.It is crosslinked that the acting as of said curing accelerator promotes, improves polyolefinic crosslinking rate and crosslink density.
In order to make said basic unit have more excellent performance, also comprise in antioxidant, hindered amine or the additive one or more in the preferred said basic unit.Said hindered amine is preferably 2,2,6,6-tetramethyl piperidine-1-oxygen base (TEMPO) and derivative thereof, and the quality of said hindered amine accounts for 0.1～1.5wt% of said polyolefin quality.Acting as barrier, suppressing photooxidation reduction or light aging process of said hindered amine improves the anti-ultraviolet ageing performance.
Said antioxidant can be single aromatic amine antioxidant, Hinered phenols antioxidant or auxiliary antioxidant; Like diphenylamines, p-phenylenediamine (PPD), EEDQ, 2; Three grades of butyl of 6--4-methylphenol, two (3; Three grades of butyl of 5--4-hydroxy phenyl) thioether, four (β-(3, three grades of butyl of 5--4-hydroxy phenyl) propionic acid) pentaerythritol ester, three monooctyl esters, three the last of the ten Heavenly stems ester, two 12 carbon alcohol esters, two ten four carbon alcohols esters, three (2, the 4-di-tert-butyl-phenyl) phosphite ester or two octadecanol ester.The quality of said antioxidant accounts for the 0.1-1.5wt% of said polyolefin quality.Acting as of said antioxidant improves polyolefin processing and long-term ageing resistace.
Said additive can be a kind of additive, also can be the composition of multiple additives, includes but not limited to ultra-violet absorber, pigment, dyestuff, filler, fire retardant or processing aid.The quality of said additive accounts for 0.01～15wt% of said polyolefin quality.
The present invention is with polyolefin and curing accelerator film-forming; In preferred interpolation antioxidant, hindered amine or the additive one or more; The method of film-forming does not have particular restriction to mixing above-mentioned each raw material also in the present invention; Can carry out according to mode well known to those skilled in the art, as using the extruder film forming of extruding and stretch.
Behind the above-mentioned raw materials film-forming, the film that obtains is carried out crosslinking Treatment.In the present invention, said crosslinking Treatment can be chemical crosslinking or cross-linking radiation, is preferably peroxide chemical crosslinking, silane chemical crosslinking or cross-linking radiation, more preferably cross-linking radiation.
Cross-linking radiation is to utilize high-energy ray ionization or excite polymer, generates big molecule free radical, carries out radical reaction, linear polymer is become have the reaction of the polymer of spacial framework.The method that adopts cross-linking radiation to produce solar cell backboard is specially: the film that polyolefin, curing accelerator, antioxidant, hindered amine and additive are solidify to form; Adopt high-energy ray that said film is carried out cross-linking radiation and handle, obtain the said film of solar cell backboard preferably with 10～30 meters/minute speed by irradiation; Said high-energy ray is preferably ultraviolet light, electron beam, neutron beam or gamma-rays, more preferably electron beam; The dosage of said irradiation is preferably 10～50Mrad.
The peroxide chemical crosslinking is that the free radical that utilizes the crosslinking agent heating and decomposition to produce causes the macromolecules cross-linking reaction, and said crosslinking agent is a peroxide.In the solar cell backboard production process of the present invention; When film-forming, add peroxide when adopting the peroxide chemical crosslinking; Be specially: the film with polyolefin, curing accelerator and peroxide cure form, in thermal source, carry out crosslinking Treatment, obtain solar cell backboard.The present invention does not have specific (special) requirements to the mode of film-forming, can carry out according to method well known to those skilled in the art.Said thermal source is preferably saturated vapor or hot inert gas.
The silane chemical crosslinking is, and that to be grafting agent with silane carry out between big molecule is crosslinked; Silane chemistry cross-linked polyolefin comprises grafting and crosslinked two processes; In the grafting process, polymer loses hydrogen atom and on main chain, produces free radical, this free radical and silane reaction under the free radical effect that the initator pyrolysis becomes; Chain taking place simultaneously shift, realizes grafting; Carry out crosslinkedly behind the film-forming, polymers grafted forms silanol under water and crosslinking catalyst effect, and then realizes crosslinked polymer.In the solar cell backboard production process of the present invention; When film-forming, add grafting agent, initator and crosslinking catalyst when adopting the silane chemical crosslinking; Be specially: with polyolefin, curing accelerator, initator, silane and crosslinking catalyst film-forming; In hot water, carry out crosslinking Treatment, obtain solar cell backboard.The present invention does not have specific (special) requirements to the mode of film-forming, can carry out according to method well known to those skilled in the art.Said initator can be peroxide, is preferably cumyl peroxide or dibenzoyl peroxide.Said crosslinking catalyst is preferably organic tin derivates such as dibutyl tin laurate.
In the present invention, be compounded with weathering layer in a side of said basic unit, said weathering layer can improve the performance of solar cell backboard as the skin of solar cell backboard; Said weathering layer is preferably fluorine material; The present invention does not have particular restriction to said fluorine material; Can be for a kind of; Also can be multiple mixture, be preferably the copolymer or in the perfluoroethylene-propylene (FEP) one or more of copolymer, CTFE and vinyl esters or vinyl ethers of copolymer (EFTE), tetrafluoroethene and the vinyl esters or the vinyl ethers of polyvinyl fluoride (PVF), Kynoar (PVDF), tetrafluoroethene and ethene.Can also add various additive well known to those skilled in the art in the said fluorine material, said additive comprises pigment, UV absorbers, dyestuff, filler, antioxidant, processing aid or crosslinking agent.
Said weathering layer can be with the form of film, through adhesives to said basic unit.The present invention does not have particular restriction to binding agent, can be polyurethane binder, epobond epoxyn, acrylic ester adhesive, is preferably polyurethane binder of bi-component; The present invention does not have particular restriction to the bonding mode of binding agent, can through combination process weathering layer be bonded in the said basic unit preferred dry combination process according to mode well known to those skilled in the art.The present invention does not have specific (special) requirements to the thickness of binding agent, can carry out according to the mode that art technology is known.Described weathering layer can also directly be coated in the said basic unit with the form of solution, and solvent is removed in oven dry then, obtains being compounded with the basic unit of said weathering layer.
The present invention also is compounded with coating at the opposite side of said basic unit, and said coating improves its performance as the internal layer of solar cell backboard; Said coating is preferably fluoropolymer, ethylene-vinyl acetate copolymer or polyolefin.Said fluoropolymer can be for a kind of; Also can be multiple mixture, like the copolymer of copolymer, CTFE and the vinyl esters of copolymer (EFTE), tetrafluoroethene and the vinyl esters or the vinyl ethers of polyvinyl fluoride (PVF), Kynoar (PVDF), tetrafluoroethene and ethene or vinyl ethers or in the perfluoroethylene-propylene (FEP) one or more.Can also add various additive well known to those skilled in the art in the said fluorine material, said additive comprises pigment, UV absorbers, dyestuff, filler, antioxidant, processing aid or crosslinking agent.
Said coating can be with the form of film, through adhesives to said basic unit.The present invention does not have particular restriction to binding agent, can be polyurethane binder, epobond epoxyn, acrylic ester adhesive, is preferably polyurethane binder of bi-component; The present invention does not have particular restriction to the bonding mode of binding agent, can according to mode well known to those skilled in the art through combination process with coated adhesive to said basic unit, the preferred dry combination process.The present invention does not have specific (special) requirements to the thickness of binding agent, can carry out according to the mode that art technology is known.Described coating can also directly be coated in the said basic unit with the form of solution, and solvent is removed in oven dry then, obtains being compounded with the basic unit of said coating.
Solar cell backboard according to the inventive method preparation is carried out the shelf depreciation test, and the result shows that the solar cell backboard of the present invention's preparation has the good insulation performance performance.
To be exposed to ultraviolet ray irradiation 2000h down according to the solar cell backboard of the inventive method preparation; The result shows; The fracture strength conservation rate of the solar cell backboard of the present invention's preparation is greater than 70%; The backboard layers of material does not ftracture, and this shows, the solar cell backboard of invention preparation has outstanding mechanical performance.
To be 85 ℃ in temperature according to the solar cell backboard of the inventive method preparation, relative humidity be to place more than the 1000h every elongation at break conservation rate at a distance from 500h inspection backboard in 85% the accelerated ageing environment; The result shows; The solar cell backboard extension at break conservation rate of in the accelerated ageing environment, placing 2000h this shows that greater than 80% the solar cell backboard of the present invention's preparation is not easy to crack; Have outstanding heat resistance ageing properties, reduced the risk of component failures.
In order further to understand the present invention, below in conjunction with embodiment solar cell backboard provided by the invention and preparation method thereof is described, protection scope of the present invention is not limited by the following examples.
The linear low density of polyethylene resin model of using in following examples is Vistalon 1703P as 1004YB and ethylene propylene diene rubber model, all available from ExxonMobil Chemical; Iso-cyanuric acid triallyl ester is available from the permanent promise chemical industry in Yantai Co., Ltd; Antioxidant 1010, antioxidant 1076, hindered amine 123 and hindered amine 622 are available from Ciba company; Two component polyurethane glue host model is TAKELAC A511, and the curing agent model is TAKENATE A50, available from Japan's military field pharmaceutical industries; Pvdf membrane is available from French A Kema; PET film model is CY25R, available from the abundant emerging insulating material factory in Changzhou; PET film model is DS10, available from east, Sichuan insulating materials; The Tedlar film is available from E.I.Du Pont Company.
Embodiment 1
Linear low density of polyethylene resin with 100 mass parts; The iso-cyanuric acid triallyl ester of 1 mass parts; 0.2 the mass parts antioxidant 1010,0.2 mass parts hindered amine 622 mixes in the high speed kneader, extrudes the film that is drawn into 250 μ m through double screw extruder then.Carry out electron beam to irradiate crosslinked by 20 meters/minute speed then, its irradiation dose is 10Mrad, forms crosslinked polyethylene film.
In crosslinked polyethylene film both sides compound through the dry type combination process on the Tedlar film of 25 μ m, used binder is a two component polyurethane glue, the thickness of binder layer is about every layer 10 μ m, obtains solar cell backboard.
Solar cell backboard to preparation carries out the shelf depreciation test, and the result is referring to table 1.
The solar cell backboard of preparation is exposed to ultraviolet ray irradiation 2000h down, and the fracture strength conservation rate of said backboard is greater than 70%, and the backboard layers of material does not ftracture.
Is 85 ℃ with the solar cell backboard of preparation in temperature, and relative humidity is to place in 85% the accelerated ageing environment more than the 1000h, every elongation at break conservation rate at a distance from 500h inspection backboard, and the result is referring to table 2.
Embodiment 2
With the ethylene propylene diene rubber of 100 mass parts, 0.1 mass parts iso-cyanuric acid triallyl ester, 0.1 mass parts antioxidant 1076,0.4 mass parts hindered amine 123 mixes in the high speed kneader, extrudes the film that is drawn into 100 μ m through double screw extruder then.Carry out electron beam to irradiate crosslinked by 20 meters/minute speed then, its irradiation dose is 20Mrad, forms crosslinked ethylene-propylene-diene monomer glued membrane.
In crosslinked ethylene-propylene-diene monomer glued membrane both sides compound through the dry type combination process on the pvdf membrane of 25 μ m, used binder is a two component polyurethane glue, the thickness of binder layer is about every layer 10 μ m, obtains solar cell backboard.
Solar cell backboard to preparation carries out the shelf depreciation test, and the result is referring to table 1.
The solar cell backboard of preparation is exposed to ultraviolet ray irradiation 2000h down, and the fracture strength conservation rate of said backboard is greater than 70%, and the backboard layers of material does not ftracture.
Is 85 ℃ with the solar cell backboard of preparation in temperature, and relative humidity is to place in 85% the accelerated ageing environment more than the 1000h, every elongation at break conservation rate at a distance from 500h inspection backboard, and the result is referring to table 2.
Embodiment 3
With 100 mass parts ethylene propylene diene rubbers, 0.5 mass parts hindered amine 123 mixes in the high speed kneader, extrudes the film that is drawn into 400 μ m through double screw extruder then.Carry out electron beam to irradiate crosslinked by 20 meters/minute speed then, its irradiation dose is 30Mrad, forms crosslinked ethylene-propylene-diene monomer glued membrane.
In crosslinked ethylene-propylene-diene monomer glued membrane both sides compound through the dry type combination process on the pvdf membrane of 25 μ m, used binder is a two component polyurethane glue, the thickness of binder layer is about every layer 10 μ m, obtains solar cell backboard.
Solar cell backboard to preparation carries out the shelf depreciation test, and the result is referring to table 1.
The solar cell backboard of preparation is exposed to ultraviolet ray irradiation 2000h down, and the fracture strength conservation rate of said backboard is greater than 70%, and the backboard layers of material does not ftracture.
Is 85 ℃ with the solar cell backboard of preparation in temperature, and relative humidity is to place in 85% the accelerated ageing environment more than the 1000h, every elongation at break conservation rate at a distance from 500h inspection backboard, and the result is referring to table 2.
Comparative example 1
In the PET film both sides of 250 μ m compound through the dry type combination process on the Tedlar film of 25 μ m, used binder is a two component polyurethane glue, the thickness of binder layer is about every layer 10 μ m, obtains solar cell backboard.
Solar cell backboard to preparation carries out the shelf depreciation test, and the result is referring to table 1.
The solar cell backboard of preparation is exposed to ultraviolet ray irradiation 2000h down, and the fracture strength conservation rate of said backboard is 70%, and the backboard layers of material does not ftracture.
Is 85 ℃ with the solar cell backboard of preparation in temperature, and relative humidity is to place in 85% the accelerated ageing environment more than the 1000h, every elongation at break conservation rate at a distance from 500h inspection backboard, and the result is referring to table 2.
Comparative example 2
In the PET film both sides of 250 μ m compound through the dry type combination process on the pvdf membrane of 25 μ m, used binder is a two component polyurethane glue, the thickness of binder layer is about every layer 10 μ m, obtains solar cell backboard.
Solar cell backboard to preparation carries out the shelf depreciation test, and the result is referring to table 1.
The solar cell backboard of preparation is exposed to ultraviolet ray irradiation 2000h down, and the fracture strength conservation rate of said backboard is 70%, and the backboard layers of material does not ftracture.
Is 85 ℃ with the solar cell backboard of preparation in temperature, and relative humidity is to place in 85% the accelerated ageing environment more than the 1000h, every elongation at break conservation rate at a distance from 500h inspection backboard, and the result is referring to table 2.
The result of partial discharge extinction voltage of the solar cell backboard that table 1 embodiment and comparative example provide
Visible by table 1, the solar cell backboard of the insulating properties of the solar cell backboard of embodiment 1～3 preparation and Comparative Examples 1～2 preparation is suitable.
The fracture storage rate of the solar cell backboard that table 2 embodiment and comparative example provide under accelerated ageing conditions
Visible by table 2, the solar cell backboard of embodiment 1～3 preparation is under the accelerated ageing environmental condition, and the fracture storage rate during 2000h still can reach more than 80%, the solar cell backboard wet and heat ageing resistant that obviously prepares than Comparative Examples 1～2.
Therefore; Tedlar film/PET film/compound the backboard of Tedlar film and the pvdf membrane/compound backboard of PET film/pvdf membrane of the solar cell backboard of the present invention's preparation and comparative example 1～2 preparation have suitable insulating properties; And the solar cell backboard of the present invention preparation has more outstanding mechanical performance and wet and heat ageing resistant performance, reduced the risk of component failures.
The explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof.Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention, can also carry out some improvement and modification to the present invention, these improvement and modification also fall in the protection domain of claim of the present invention.
To the above-mentioned explanation of the disclosed embodiments, make this area professional and technical personnel can realize or use the present invention.Multiple modification to these embodiment will be conspicuous concerning those skilled in the art, and defined General Principle can realize under the situation that does not break away from the spirit or scope of the present invention in other embodiments among this paper.Therefore, the present invention will can not be restricted to these embodiment shown in this paper, but will meet and principle disclosed herein and features of novelty the wideest corresponding to scope.
Claims (10)
1. solar cell backboard comprises basic unit, is compound in the weathering layer of said basic unit one side and is compound in the coating of said basic unit opposite side that said basic unit is obtained by polyolefin crosslinking curing under the curing accelerator effect.
2. solar cell backboard according to claim 1 is characterized in that, in the said basic unit, said polyolefin is one or more in polyethylene, polypropylene, ethylene propylene diene rubber or the EP rubbers.
3. solar cell backboard according to claim 1 is characterized in that said basic unit also comprises one or more in antioxidant, hindered amine or the additive.
4. according to any described solar cell backboard of claim 1～3, it is characterized in that said curing accelerator is ester, ether or the ketone that contains 2 and above unsaturated group.
5. solar cell backboard according to claim 1 is characterized in that, said coating is fluoropolymer, ethylene-vinyl acetate copolymer or polyolefin.
6. solar cell backboard according to claim 1 is characterized in that, said weathering layer is a fluorine material.
7. the production method of a solar cell backboard may further comprise the steps:
With polyolefin and curing accelerator film-forming, carry out obtaining solar cell backboard after the crosslinking Treatment.
8. production method according to claim 7 is characterized in that, said crosslinking Treatment is peroxide chemical crosslinking, silane chemical crosslinking or cross-linking radiation.
9. production method according to claim 8 is characterized in that, the high-energy ray of said cross-linking radiation is ultraviolet ray, electron beam, neutron beam or gamma-rays.
10. any according to Claim 8～9 described production method is characterized in that the irradiation dose of said cross-linking radiation is 10～50Mrad.
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| CN201210122305.0A CN102642364B (en) | 2012-04-24 | 2012-04-24 | A kind of solar cell backboard and production method thereof |
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| CN201210122305.0A CN102642364B (en) | 2012-04-24 | 2012-04-24 | A kind of solar cell backboard and production method thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN103897266A (en) * | 2012-12-28 | 2014-07-02 | 苏州度辰新材料有限公司 | Resin composition for base material of solar backboard |
| 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 |
| 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 |
| CN109461781A (en) * | 2018-10-15 | 2019-03-12 | 浙江尚越新能源开发有限公司 | A kind of rolled flexible thin film solar component |
| CN112409697A (en) * | 2020-11-06 | 2021-02-26 | 乐凯胶片股份有限公司 | Polyolefin film and manufacturing method thereof, solar cell back plate and solar cell |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201773848U (en) * | 2010-07-05 | 2011-03-23 | 张美正 | Back board structure of solar panel module |
| WO2012024262A1 (en) * | 2010-08-16 | 2012-02-23 | 3M Innovative Properties Company | Polyolefin-based solar backsheet |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201773848U (en) * | 2010-07-05 | 2011-03-23 | 张美正 | Back board structure of solar panel module |
| WO2012024262A1 (en) * | 2010-08-16 | 2012-02-23 | 3M Innovative Properties Company | Polyolefin-based solar backsheet |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103897266A (en) * | 2012-12-28 | 2014-07-02 | 苏州度辰新材料有限公司 | Resin composition for base material of solar backboard |
| 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 |
| CN109461781A (en) * | 2018-10-15 | 2019-03-12 | 浙江尚越新能源开发有限公司 | A kind of rolled flexible thin film solar component |
| CN112409697A (en) * | 2020-11-06 | 2021-02-26 | 乐凯胶片股份有限公司 | Polyolefin film and manufacturing method thereof, solar cell back plate and solar cell |
| 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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| CN102642364B (en) | 2016-08-24 |
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