CN101605657A - The backboard of photovoltaic module and the method for keeping in repair this backboard - Google Patents
The backboard of photovoltaic module and the method for keeping in repair this backboard Download PDFInfo
- Publication number
- CN101605657A CN101605657A CNA2008800021937A CN200880002193A CN101605657A CN 101605657 A CN101605657 A CN 101605657A CN A2008800021937 A CNA2008800021937 A CN A2008800021937A CN 200880002193 A CN200880002193 A CN 200880002193A CN 101605657 A CN101605657 A CN 101605657A
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- Prior art keywords
- backboard
- layer
- fluorinated copolymer
- polyester
- sputter
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Links
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Images
Classifications
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
- B05D5/12—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain a coating with specific electrical properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/02—Details
- H01L31/0216—Coatings
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Electromagnetism (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 provides the protectiveness backboard that is used for photovoltaic module.Backboard of the present invention has tack and the resistance to marring between excellent weatherability, hear resistance, colour retention, layer and the sealant.Described backboard can be reduced to minimum because of the degeneration that moisture infiltrates the solar module performance that causes.The long-term photoelectric transformation efficiency that this backboard can also obtain to expect.In addition, can also be with described backboard, or claim tergite, make and have form attractive in appearance.
Description
Background of invention
Technical field
The present invention relates to photovoltaic module.More specifically, the present invention relates to the protectiveness backboard.
Description of Related Art
The employed solar energy of photovoltaic module is one of most promising alternative energy source of oil, and in this century, oil is just depleted.Yet it is expensive that the process of production and installation photovoltaic module remains.Typical photovoltaic module is made up of glass or flexible transparent front panel, solar cell, sealant, protectiveness backboard, the protective seal at covering assemblies edge and the aluminum frame of covering sealing.As shown in Figure 1, front panel 10, backboard 20 and sealant 30 and 30 ' are designed to protect array 40 not to be subjected to the influence of climatic factor, humidity, mechanical load and impact.And these parts provide the electrical isolation that is used for personal security and electric leakage.Protectiveness backboard 20 is intended to improve the service life and the efficient of photovoltaic module, thereby reduces the unit power cost of photovoltaic electric current.In order to realize the light transmission of height, front panel 10 and sealant 30 and 30 ' must be transparent, must be highly opaque in order to obtain backboard attractive in appearance still, and must have highly reflective for functional purpose backboard.For a lot of reasons, the expectation solar module is frivolous, and these reasons comprise and be particularly useful for the weight reduction that building (with the photovoltaic (PV) of building one) and space are used, and Military Application (be combined in soldier's equipment etc. in).In addition, frivolous assembly helps to reduce cost.The reduction of employed quantity of material also makes this technology " green " more, thereby has saved more natural resources.
The current means of making frivolous solar cell are in conjunction with frivolous backboard.Yet the back cladding material also must have certain moisture resistance and infiltrate to prevent moisture and water, and the infiltration of wet G﹠W may cause that the parts that are capped such as photovoltaic element, lead and electrode get rusty and the solar cell damage.In addition, backboard electrical isolation, mechanical protection, certain ultraviolet ray (UV) stability should be provided, to the tack of sealant and the ability that connects output line.
The present protectiveness backboard that uses is laminated product normally.Fig. 2 provides the diagram of typical lamination backboard 20.Lamination is by as the most common of critical component being
Polyvinyl fluoride rete 22, polyester (PET) rete 24 and ethene-vinyl acetate (EVA) copolymer rete 26 form.Sealant layer 30 in EVA layer 26 and the assembly is bonding and as dielectric layer, and EVA layer 26 has good moisture barrier properties.The size of this EVA is stable.White EVA significantly improves power.Polyester layer 24 is very firm, has excellent dielectricity, dimensionally stable, and also have good moisture barrier properties.Polyvinyl fluoride layer 22 is as very weather-proof layer.
Even if it is these retes have satisfied neutralize performance standard in the actual use of required test, but still have some limitation, high and obtain as cost
Rete is restricted.Such as PVF
ECTFE
Be under the temperature that environment temperature or appropriateness raise, to process with another shortcoming of the material of the prior art of other fluoropolymer to such material.For example, use high boiler (usually, to orientation
Use dimethyl acetyl ammonium, right
SP uses propene carbonate) make the PVF rete by casting technique by diffusion.The boiling point of dimethyl acetyl ammonium is 164-166 ℃, and the boiling point of propene carbonate is 200 ℃.Must 160 ℃ and 90% or higher solvent under spread.Because the thermal instability of PVF resin can not be accepted higher temperature: to such an extent as to the fusion of PVF resin and decomposition temperature can be decomposed in the process of curing near PVF very much.Therefore, exist
There is residual solvent in the rete always.DuPont is reported in all orientations
Dimethylacetylamide (DMAC) residual quantity that has 0.05wt% to 1.0wt% in the PVF rete.
Perhaps, ECTFE
Rete is made by melt extruding technology under 350 ℃-375 ℃.Therefore, ECTFE
Rete can not easily mix with pigment, clay etc., and this rete is also expensive.
The 5th, 741, No. 370 United States Patent (USP) proposes, can make and the assembly installation cost by thermoplastic olefin is reduced as backsheet material, described thermoplastic olefin comprises two kinds of different ionomeric combinations, the for example combination of sodium ionomer and zinc ionomer, and this combination is described to produce synergy, and described synergy is increased to the steam barrier properties of back veneer material on the barrier properties of any single ionomer component.This patent also discloses the use of the ionomer sealant with two ionomer tergites.
Yet, American National regenerative resource laboratory (NREL) report, ionomer resin comprises the methacrylic acid of free and combination, and it need use the stainless steel instrument in the melt-processed process, thereby has increased manufacturing cost.PVMaT in the subcontract report of Solarex photovoltaic module manufacturing technology year improves (PVMaT Improvements in the Solarex PhotovoltaicModule Manufacturing Technology Annual Subcontract Report), on April 30th, 1 1999 on May 5th, 1998, National Renewable Energy Laboratory, in January, 2000 NREL/SR-520-27643.
Summary of the invention
The invention provides the protectiveness backboard that is used for photovoltaic module.Backboard of the present invention has tack and the resistance to marring between excellent weatherability, hear resistance, colour retention, layer and the sealant.This backboard can be reduced to minimum because of the degeneration that moisture infiltrates the solar module performance that causes.The long-term photoelectric transformation efficiency that this backboard can also obtain to expect.In addition, described backboard, or claim tergite, can be made with form attractive in appearance.
Make backboard of the present invention with EVA is compound then by employing liquid coating paint-on technique, and can prune this backboard according to application requirements.And, adopt the benefit of the solar module of described backsheet material to comprise the remarkable reduction of manufacturing cost.
In tergite, use the liquid coating preparation to overcome one or more defectives of the tergite of prior art.Can make tergite thinner than current obtainable tergite.Backsheet material comprises the material of easier acquisition, and described material can be processed at ambient temperature or under the temperature of appropriateness rising.Can directly these liquid coatings be coated on the second layer of lamination, thereby not need adhesive.In addition, can be easily these liquid coatings be mixed with additive such as pigment, clay etc.
In one aspect, described the backboard that is used for photovoltaic module, it has the layer that comprises the crosslinkable amorphous fluoropolymer that dissolves in organic solvent.This fluoropolymer can be CTFE (CTFE) and the fluorinated copolymer that comprises one or more alkyl vinyl ethers of the alkyl vinyl ether with reactive OH function.This backboard can comprise the crosslinking agent that mixes with this fluorinated copolymer.
This backboard also can comprise the extra play such as polyester layer.Other lifts an example, and this backboard also can comprise the EVA layer.Other optional extra play can comprise following a kind of: with polyester, Merlon, polyolefin, polyurethanes, liquid crystal polymer, aclar, aluminium, sputter aluminium oxide polyester, sputter silica or silicon nitride polyester, sputter aluminium oxide Merlon and sputter silica or the silicon nitride Merlon of EVA coextrusion.
Can by or the fluorinated copolymer layer of backboard is not coated to the layer of polyester layer or other type by adhesive.And, this fluorinated copolymer layer can be applied to single or multiple lift.In one embodiment, the thickness of fluorinated copolymer layer is less than 1 Mill.In another aspect, the thickness of fluorinated copolymer layer is greater than 1 Mill.In another embodiment, backboard comprises silica.
Another aspect of the present invention has been described the backboard that is used for photovoltaic module.This backboard has the layer of the copolymer of the alkene that comprises tetrafluoroethene (TFE) and have reactive OH function.This backboard also can comprise the crosslinking agent that mixes with this fluorinated copolymer.In one embodiment, the thickness of fluorinated copolymer layer is less than 1 Mill.In another embodiment, the thickness of fluorinated copolymer layer is greater than 1 Mill.In another embodiment, backboard also has ionomer layer.
Fluorinated copolymer can be the terpolymer that maybe can comprise one or more fluorochemical monomers.In one embodiment, described terpolymer comprises vinylidene fluoride, tetrafluoroethene and hexafluoropropene.
And described backboard also can comprise the extra play such as polyester layer.Can be by adhesive or the fluorinated copolymer layer is not coated to polyester layer by adhesive.Can individual layer or the combination of transparent and coloured multilayer described fluorinated copolymer layer is applied.Can carry out corona discharge to the polyester rete extraly or carry out chemical treatment to improve adhesive force.Described backboard also can comprise the EVA layer.In another embodiment, described backboard comprises silica.Other optional extra play can comprise following a kind of: Merlon, with polyester, polyolefin, polyurethanes, liquid crystal polymer, aclar, aluminium, sputter aluminium oxide polyester, sputter silica or silicon nitride polyester, sputter aluminium oxide Merlon, sputter silica or silicon nitride Merlon, the sputter aluminium oxide of EVA coextrusion
The sputter aluminium oxide
Sputter silica or silicon nitride Lumiflon, sputter silica or silicon nitride
The method of the backboard of maintenance photovoltaic module is provided in one aspect of the method.Described method is included in the step that when needing repairing preparation is coated to the zone of described backboard, and described preparation comprises CTFE (CTFE) and the amorphous fluorinated copolymer that comprises one or more alkyl vinyl ethers of the alkyl vinyl ether with reactive OH function.In one embodiment, under the temperature of environment temperature or appropriateness rising, described preparation is coated to described backboard.In another embodiment, described preparation is made up of first component and second component, and described first and second components are arranged in the two-chamber injector that is equipped with static mixer, and applies by the coating unit that is connected to described injector.
In one embodiment, first component of described preparation is made up of the mixture of crosslinking agent and solvent, and second component is made up of the mixture of solvent and fluorinated copolymer.
Description of drawings
In order to understand the present invention better, can be with reference to accompanying drawing.
Fig. 1 shows the expanded view of the parts of typical light photovoltaic assembly.
Fig. 2 shows an embodiment of typical backboard.
The chart of Fig. 3 demonstrates with the backboard based on Tedlar and compares, based on the backboard of the Lumiflon tensile strength as the function of " damp and hot " exposed amount.
The chart of Fig. 4 demonstrates with the backboard based on Tedlar and compares, based on the backboard of the Lumiflon elongation at break as the function of " damp and hot " exposed amount.
The chart of Fig. 5 demonstrate based on the backboard of Lumiflon with based on the UV stability of the backboard of Tedlar relatively.
Fig. 6 shows and repairs the example of the common coating unit that uses of external member.
Detailed Description Of The Invention
The invention provides the protectiveness backboard for photovoltaic module. In one embodiment, logical Cross employing liquid coating paint-on technique and make backboard. In a preferred embodiment, at liquid coating Compound with EVA after applying. Can carry out according to the combination process of the needs that apply to EVA Adjust.
In another embodiment, provide encapsulant. This encapsulant has excellent Weatherability, heat resistance, UV stability, to other of back veneer material and solar module The excellent colour retention of the adhesive force of parts, electrical separation and not yellowing. By spraying institute State encapsulant and apply, thereby cancelled vacuum combination process at elevated temperatures also And reduced manufacturing cost.
In another aspect, provide employing " repairing external member " to being torn or otherwise Impaired tergite carries out fast and the method for keeping in repair easily. Described method and repairing external member are fair Perhaps the backboard in breakage applies attractive in appearance and firm in the situation that does not adopt extreme temperature and pressure Coating. And such " repairing external member " allows to carry out at the scene to tie up fast and effectively Repair. Use the coating of repairing the external member coating to satisfy EC 60664-1, IEC according to method of the present invention 61730, all requirements of IEC 1646 and ASTM F1249. In this aspect of the invention In the preferred embodiment, be equipped with the two-chamber injector of static mixer and apply dress by use Put coating " repairing " preparation.
Can apply liquid used in the present invention under the temperature of environment temperature or appropriateness rising is coated with The material preparation. The key component of liquid coating preparation is fluoropolymer, be preferably dissolve in organic Solvent or water dispersible crosslinkable amorphous fluoropolymer.
The preferred ingredient of coating comprises the fluorinated copolymer with following structure:
And
The fluoropolymer that can use in liquid preparation includes but not limited to
(Asahi Glass) and
(Daikin). Other material comprises FluoroPelTMAnd FluoroThaneTM(Cytonix Corporation)、FluoroLink
TMCondensate modifier (Solvay Solexis). Annexing ingredient in the liquid coating preparation comprise crosslinking agent, catalyst, Solvent and optional filler and such as the inorganic material of boron nitride (Zyp Coatings).
A kind of particularly preferred fluoropolymer is developed in nineteen eighty-two by Asahi Glass
CTFE (CTFE) and some specific alkyl vinyls The amorphous fluorinated copolymer of ether (VE).
The polymer that is combined as of alkyl vinyl ether monomer and oh group provides significant spy The property, such as compatibility, cross-linking reaction, the adhesive force to substrate, the hardness of solubility, pigment With flexible.
Another preferred fluoropolymer is
Resin (Daikin), it is tetrafluoroethene (TFE) and the copolymer that dissolves in the alkene of organic solvent.More specifically,
Be based on the tetrafluoroethene of solvent and have the copolymer of the alkene of reactive OH function, and be prepared as the base resin in high-performance paint and the coating.
In another embodiment, fluoropolymer is a terpolymer.Terpolymer can comprise one or more different fluorochemical monomers.For example, terpolymer comprises vinylidene fluoride, tetrafluoroethene and hexafluoropropene.Dyneon
TMTHV is a kind of such terpolymer, and the combination of performance advantage is provided, as low processing temperature, be bonded to elastomer and based on ability, the flexible and optical transparence of the plastics of hydrocarbon.As transparent rete, can be with Dyneon
TMTHV is used as front panel to replace glass.Add pigment the rete that can be used as the backboard of photovoltaic module is provided.
Can be used for including but not limited to such as following organic solvent with the organic solvent that forms the liquid coating preparation among the present invention: methyl ethyl ketone (MEK), acetone, methyl iso-butyl ketone (MIBK) (MIBK), toluene, dimethylbenzene, methyl alcohol, isopropyl alcohol, ethanol, heptane, ethyl acetate, isopropyl acetate, n-butyl acetate, n-butanol or their mixture.Preferred solvent comprises dimethylbenzene, cyclohexanone and methyl ethyl ketone (MEK).Following solvent is suitable: all components all are dissolved in wherein, and boiling point is low to being enough to make the minimum or removal of the retention of residual solvent in coating.
Can be used for including but not limited to titanium dioxide, carbon black, perylene pigment, pigment, dyestuff, mica, polyamide powder, boron nitride, zinc oxide, aluminium oxide, silica, UV absorbent, corrosion inhibitor and drier with optional pigment and the filler that forms protective coating among the present invention.A kind of preferred pigment is titanium dioxide
R-105 (DuPont).A kind of preferred hydrophobically modified silica is Cab-o-sil TS 720 (Cabot).The function of pigment, UV absorbent and corrosion inhibitor provides opacity and weatherability.
Ultrafine is preferred polyamide powder (Arkema Inc), and can be involved to be used to reduce gloss.Can comprise carbon black, pigment and dyestuff to change the color of backboard.Can comprise mica so that anti-flammability to be provided.Can comprise boron nitride, aluminium nitride and/or aluminium oxide to improve heat conductivity.Preferably comprise
Nanoclays (Southern Clay Products), 3M
TMGlass Bubbles and drier are to improve the moisture barrier properties.Can comprise silica and/or boron nitride to improve dielectric property.Also can comprise silica to reduce gloss and anti-flammability is provided.
The preferred crosslinking agent that adopts does not peel off rete with what obtain to be insoluble to organic solvent in forming protective coating.Preferred cross-linking agents includes but not limited to DuPont
Organic titanate, silane, isocyanates and melamine.Surpass 30 years because these retes can use usually out of doors, so the preferred aliphat isocyanates is to guarantee weatherability.
For example, can be by mixing
Solution, pigment, crosslinking agent and Preparation of Catalyst based on
The liquid preparation of coating composition.Utilize dibutyl tin laurate to quicken Lumiflon (polyol) in the organic solvent and the cross-linking reaction between the isocyanates.By mixing by weight preferably 3 to 80 parts and even more preferably about 46 parts
Solution, 5 to 60 parts of (more preferably about 17 parts) pigment by weight and 20 to 80 parts of (more preferably about 32 parts) organic solvents (mixture of MEK and dimethylbenzene or cyclohexanone) by weight prepare this composition.
Backboard also can comprise extra play.Can by or extra play is not coated to the fluorinated copolymer layer by adhesive.Optional extra play can comprise for example following a kind of: polyester, EVA, Merlon, polyolefin, polyurethanes, acrylic resin, polyimides, polyamide, liquid crystal polymer, aclar, aluminium, sputter aluminium oxide polyester, sputter silica or silicon nitride polyester, sputter aluminium oxide Merlon, sputter silica or silicon nitride Merlon, transparent fluoropolymer and transparent fluorinated copolymer, such as the coextrusion layer of the polymer of polyester and EVA, and polybutadiene.
Embodiment 1
Embodiment 1 illustrated of the present invention based on
The preparation of protectiveness backboard.Be used for this embodiment's
Be 200 grades of LF, the xylene solution as 60% (200g) obtains from Asahi Glass.The pigment that is used for this embodiment obtains from DuPont
R-105 (76.2g).Crosslinking agent obtains from Bayer
N3300 (21.4g).By use high-shear mixer with pigment with
Solution mixes, and adds solvent and crosslinking agent then.
Apply preparation then.By applicator roll liquid preparation is transferred to rete from disk container, and liquid preparation is measured to obtain the coating weight of expectation by Mayer Rod.Coating directly is coated in
(DuPont) on (5 Mill) polyester rete.Without any need for adhesive, and do not use any adhesive in this embodiment yet.With 10-120g/m
2, preferred 30-90g/m
2And more preferably 30-45g/m
2Coating weight apply coating.
Dry paint is by by weight 60-65%'s
35% pigment is by weight formed.In this embodiment, by using polyester-urethane composite adhesive, will by based on
Preparation the polyester rete and the EVA (containing 4% vinylacetate) that cover compound.Then that resulting lamination and EVA sealant and assembly vacuum is compound.
Table 1 has shown and usefulness
The backboard of SP preparation is compared, based on
With
The characteristic of protectiveness backboard.
Table 1
Table 2 has shown and has used orientation
The backboard of preparation is compared, based on
The characteristic of protectiveness backboard.
Table 2
Above presentation of results, thickness be 0.5 Mill based on
With
Coating to demonstrate than thickness be the nondirectional of 1 Mill
The barrier properties (lower moisture permeability and the proof voltage of Geng Gao) that SP is more excellent, and thickness is the nondirectional of 1 Mill
The thickness of SP is
With
The twice of layer thickness.In addition, based on
Backboard than based on
Backboard more cost-effective.
Table 3 shown with directed
The backboard of preparation is compared, based on
The weatherability of protectiveness backboard.Sample is placed the environmental chamber 2000 hours under the condition of 85 ℃ and 85% relative humidity (" damp and hot ").By peeling off test, ASTM D 3359 and intersect the test of otch adhesive tape adhesive force and ASTM D882 and measure the tensile strength and the elongation at break of the function of adhesive force between skin and the polyester, conduct " damp and hot " exposed amount, estimate outer field weatherability according to ASTM D 903-98 is bonding.Abbreviation: TB below adopting in table 3 tears in conjunction with (tear bond); 5B=loses 0% coating; 4B=loses and is lower than 5% coating; 3B=loses the coating of 5-15%; 2B=loses the coating of 15-35%; IB=loses the coating of 35%-65%; And 0B=loses the coating above 65%.
Table 3
As shown in table 3, thin based on
Backboard weatherability with based on orientation
Backboard suitable.
Fig. 3 and 4 shows, as the function of " damp and hot " exposed amount based on
The tensile strength of backboard and elongation at break than based on
Backboard much lower.
In order to assess UV stability, sample is placed the Atlas ci 4000 xenon lamp chambers 4600 hours that are equipped with xenon arc lamp, periodic measurement L*a*b*.The b*-value is represented material " yellowing ".As shown in Figure 5, based on
Backboard UV stability with based on
Backboard suitable.
Embodiment 2
Embodiment 2 illustrated of the present invention based on
The preparation of optional embodiment of protectiveness backboard.Be used for embodiment's 2
Be 200 grades of LF, the xylene solution as 60% (150g) obtains from Asahi Glass.The pigment that is used for this embodiment obtains from DuPont
R-105 (57g).The hydrophobically modified silica that is used for this embodiment is the Cab-o-sil TS-720 (10g) that obtains from Cabot.Used crosslinking agent obtains from Bayer
N3300 (16g).The catalyst that is used for this embodiment is the dibutyl tin laurate that obtains from Aldrich (0.15g 0.1% MEK solution).By use high-shear mixer with pigment and silica and
Solution mixes, and adds solvent, crosslinking agent and catalyst then.
Apply preparation then.By applicator roll liquid preparation is transferred to rete from disk container, and measures to obtain the coating weight of expectation by Mayer Rod.Coating directly is coated in
(DuPont) on (5 Mill) polyester rete.Without any need for adhesive, and do not use any adhesive in this embodiment yet.With 10-120g/m
2, preferred 30-90g/m
2And more preferably 30-45g/m
2Coating weight apply coating.
Table 4
As shown in table 4, comprise the embodiment 2 that adds silica no silica based on
The backboard basis on produce 45V (maximum permissible voltage) increase, and based on
The basis of backboard on produce 40V increase.
Embodiment 3
Embodiment 3 illustrated another embodiment of the present invention (based on
" repairing assembly " preparation) preparation.
Based on the repairing assembly preparation of Lumiflon preferably by the formulation preparation of the component that comprises two kinds of isolation (A and B).
(form by the mixture of Isocyanate Desmodur N3300 (2.5g, Bayer)) and solvent (being dimethylbenzene in this embodiment) by crosslinking agent for component A.
B component is made up of the mixture of solvent, pigment and fluorinated copolymer.In this embodiment, be prepared as follows B component.(Disperbyk 111 (0.25g, BYK-Chemie)) is with 14.1g's with dispersant
LF 200 dimethylbenzene,
R101 pigment (10g, DuPont),
The mixture of 2002D (4.7g, Arkema Inc) and coloring agent (Microlith Blue, Microlith Yellow, Microlith Brown and Orasol Black) mixes.Can add the color of the backboard that different coloring agents is torn with coupling.
In use, component A and B are placed the two-chamber injector that is equipped with static mixer.By using coating unit on the broken parts of backboard, to apply preparation.Can obtain a kind of such coating unit from BrandywineAssociates, Fig. 6 shows this coating unit, and in the drawings, blender is labeled as 50, and the coating unit threshold marker is 52, and the repairing assembly preparation that applies is labeled as 54.Yet, can use coating unit to apply preparation such as any kind of brush.
Repair assembly applicable to a variety of backboards, such as those by such as
Backboard that the material of the prior art of/polyester/EVA is prepared or backboard prepared in accordance with the present invention.The preparation that is coated to based on the backboard of Tedlar has been carried out the shelf depreciation test.The result who has gathered this test in the table 5.
The result of table 5. shelf depreciation test
In addition, by intersecting otch adhesive tape test ASTM D 3359-97, said preparation demonstrates the excellent adhesive attraction to the bottom of back veneer material, i.e. 5B.
Existence is to the conspicuous disclosed various modifications of the present invention of those skilled in the art, adjustment and application, and the application is intended to comprise these embodiments.Although invention has been described by some preferred implementation, the gamut of these embodiments is determined by the scope of reference appending claims.
The disclosure of incorporating various publications, patent and patent application that this paper quoted as proof with reference mode integral body into.
Claims (32)
1. be used for the backboard of photovoltaic module, it comprises:
Comprise and dissolve in layer organic solvent and/or water dispersible crosslinkable amorphous fluoropolymer.
2. backboard as claimed in claim 1, wherein, described fluoropolymer is the fluorinated copolymer of CTFE (CTFE) and one or more alkyl vinyl ethers.
3. backboard as claimed in claim 2, it further comprises the crosslinking agent that mixes with described fluorinated copolymer.
4. backboard as claimed in claim 3, it further comprises and comprises following one or more layer: polyester, Merlon, polyolefin, polyurethanes, liquid crystal polymer, aclar, aluminium, sputter aluminium oxide polyester, sputter silica polyester, sputter aluminium oxide Merlon and sputter silica Merlon.
5. backboard as claimed in claim 4, the described layer that wherein will comprise the described crosslinking agent that mixes with described fluorinated copolymer under the situation of adhesive-free is coated to described polyester layer.
6. backboard as claimed in claim 5, it further comprises the EVA layer.
7. backboard as claimed in claim 6, the thickness of wherein said fluorinated copolymer layer is less than 1 Mill.
8. backboard as claimed in claim 6, the thickness of wherein said fluorinated copolymer layer is greater than 1 Mill.
9. backboard as claimed in claim 4, it further comprises silica, titanium oxide, aluminium oxide, zinc oxide, beryllium oxide, mica, clay, boron nitride, aluminium nitride, titanium nitride, carbon black and/or organic pigment.
10. be used for the backboard of photovoltaic module, it comprises:
The layer of copolymer that comprises tetrafluoroethene and alkene with reactive OH function.
11. backboard as claimed in claim 10, it further comprises the crosslinking agent that mixes with described fluorinated copolymer.
12. backboard as claimed in claim 11, it further comprises and comprises following one or more layer: polyester, Merlon, polyolefin, polyurethanes, liquid crystal polymer, aclar, aluminium, sputter aluminium oxide polyester, sputter silica polyester, sputter aluminium oxide Merlon and sputter silica Merlon.
13. backboard as claimed in claim 11, the described layer that wherein will comprise the described crosslinking agent that mixes with described fluorinated copolymer under the situation of adhesive-free is coated to described polyester layer.
14. backboard as claimed in claim 13, it further comprises the EVA layer.
15. backboard as claimed in claim 13, it further comprises ionomer layer.
16. backboard as claimed in claim 12, it further comprises the layer of the fluorinated copolymer of CTFE (CTFE) and one or more alkyl vinyl ethers.
17. backboard as claimed in claim 13, the thickness of wherein said fluorinated copolymer layer is less than 1 Mill.
18. backboard as claimed in claim 13, the thickness of wherein said fluorinated copolymer layer is greater than 1 Mill.
19. backboard as claimed in claim 11, it further comprises following one or more: silica, titanium oxide, aluminium oxide, zinc oxide, beryllium oxide, mica, clay, boron nitride, aluminium nitride, titanium nitride, carbon black and organic pigment.
20. be used for the backboard of photovoltaic module, it comprises:
The layer that comprises the terpolymer of vinylidene fluoride, tetrafluoroethene and hexafluoropropene.
21. backboard as claimed in claim 20, it further comprises and comprises following one or more layer: polyester, Merlon, polyolefin, polyurethanes, liquid crystal polymer, aclar, aluminium, sputter aluminium oxide polyester, sputter silica polyester, sputter aluminium oxide Merlon and sputter silica Merlon.
22. backboard as claimed in claim 21, it further comprises the EVA layer.
24. backboard as claimed in claim 21, it further comprises ionomer layer.
25. backboard as claimed in claim 21, it further comprises the layer of the fluorinated copolymer of CTFE (CTFE) and one or more alkyl vinyl ethers.
26. backboard as claimed in claim 25, the thickness of wherein said fluorinated copolymer layer is less than 1 Mill.
27. backboard as claimed in claim 25, the thickness of wherein said fluorinated copolymer layer is greater than 1 Mill.
28. backboard as claimed in claim 20, it further comprises silica, titanium oxide, aluminium oxide, zinc oxide, beryllium oxide, mica, clay, boron nitride, aluminium nitride, titanium nitride, carbon black and/or organic pigment.
29. the method for the backboard of maintenance photovoltaic module, it comprises:
Preparation is coated to the zone of described backboard when needing repairing, described preparation comprises the amorphous fluorinated copolymer of CTFE (CTFE) and one or more alkyl vinyl ethers.
30. the method for maintenance backboard as claimed in claim 29, wherein said preparation is made up of two kinds of components, and wherein said first component is made up of the mixture of crosslinking agent and solvent, and described second component is made up of the mixture of solvent and fluorinated copolymer.
31. method as claimed in claim 29 wherein is coated to described backboard with described preparation under the temperature of environment temperature or appropriateness rising.
32. method as claimed in claim 29 wherein is coated to described backboard by spraying with described preparation under the temperature of environment temperature or appropriateness rising.
33. method as claimed in claim 30 wherein places the two-chamber injector that is equipped with static mixer with described first and second components, and applies by coating unit and/or the brush that is connected to described injector.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US90198207P | 2007-02-16 | 2007-02-16 | |
| US60/901,982 | 2007-02-16 | ||
| US12/011,962 US20080264484A1 (en) | 2007-02-16 | 2008-01-30 | Backing sheet for photovoltaic modules and method for repairing same |
| US12/011,962 | 2008-01-30 | ||
| PCT/US2008/001351 WO2008143719A2 (en) | 2007-02-16 | 2008-02-01 | Backing sheet for photovoltaic modules and method for repairing same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101605657A true CN101605657A (en) | 2009-12-16 |
| CN101605657B CN101605657B (en) | 2015-01-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200880002193.7A Expired - Fee Related CN101605657B (en) | 2007-02-16 | 2008-02-01 | Backing sheet for photovoltaic and method for repairing same |
Country Status (9)
| Country | Link |
|---|---|
| EP (1) | EP2121311A4 (en) |
| JP (1) | JP2010519742A (en) |
| KR (2) | KR101388381B1 (en) |
| CN (1) | CN101605657B (en) |
| AU (1) | AU2008253723A1 (en) |
| CA (1) | CA2673018A1 (en) |
| MX (1) | MX2009008763A (en) |
| TW (1) | TW200933902A (en) |
| WO (1) | WO2008143719A2 (en) |
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- 2008-02-01 KR KR1020097013982A patent/KR101388381B1/en not_active IP Right Cessation
- 2008-02-01 MX MX2009008763A patent/MX2009008763A/en unknown
- 2008-02-01 EP EP08794278A patent/EP2121311A4/en not_active Withdrawn
- 2008-02-01 AU AU2008253723A patent/AU2008253723A1/en not_active Abandoned
- 2008-02-01 CA CA002673018A patent/CA2673018A1/en not_active Abandoned
- 2008-02-01 JP JP2009550092A patent/JP2010519742A/en active Pending
- 2008-02-01 KR KR1020137001154A patent/KR20130027038A/en not_active Application Discontinuation
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- 2008-10-07 TW TW097138537A patent/TW200933902A/en unknown
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| WO2007010706A1 (en) * | 2005-07-22 | 2007-01-25 | Daikin Industries, Ltd. | Back sheet of solar cell |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102712771A (en) * | 2010-01-14 | 2012-10-03 | 阿克马法国公司 | Film containing an odourless fluorinated acrylic polymer for photovoltaic use |
| CN103038061A (en) * | 2010-05-06 | 2013-04-10 | Lg化学株式会社 | Multilayered sheet, and method for preparing same |
| CN103794670A (en) * | 2014-02-28 | 2014-05-14 | 英利能源（中国）有限公司 | Flexible backplane and photovoltaic module |
| CN106206850A (en) * | 2016-08-25 | 2016-12-07 | 迅力光能（昆山）有限公司 | The restorative procedure of flexible thin-film solar cell |
Also Published As
| Publication number | Publication date |
|---|---|
| CA2673018A1 (en) | 2008-11-27 |
| EP2121311A2 (en) | 2009-11-25 |
| EP2121311A4 (en) | 2012-10-31 |
| CN101605657B (en) | 2015-01-14 |
| KR20130027038A (en) | 2013-03-14 |
| KR101388381B1 (en) | 2014-04-28 |
| JP2010519742A (en) | 2010-06-03 |
| WO2008143719A3 (en) | 2009-02-26 |
| WO2008143719A2 (en) | 2008-11-27 |
| TW200933902A (en) | 2009-08-01 |
| MX2009008763A (en) | 2009-10-08 |
| AU2008253723A1 (en) | 2008-11-27 |
| KR20090121273A (en) | 2009-11-25 |
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