CN105150645A - Composite rear panel for solar cells and method for manufacturing composite rear panel - Google Patents

Composite rear panel for solar cells and method for manufacturing composite rear panel Download PDF

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Publication number
CN105150645A
CN105150645A CN201510532378.0A CN201510532378A CN105150645A CN 105150645 A CN105150645 A CN 105150645A CN 201510532378 A CN201510532378 A CN 201510532378A CN 105150645 A CN105150645 A CN 105150645A
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Prior art keywords
backboard
fluoride
rear panel
calcirm
solar cell
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CN201510532378.0A
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CN105150645B (en
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施成军
张津
汤叶华
宋文洲
薛顾政
卢宝荣
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EOPLLY NEW ENERGY TECHNOLOGY Co Ltd
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EOPLLY NEW ENERGY TECHNOLOGY Co Ltd
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Priority to PCT/CN2015/093266 priority patent/WO2017031827A1/en
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    • 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
    • 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
    • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
    • 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
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/304—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl halide (co)polymers, e.g. PVC, PVDC, PVF, PVDF
    • 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
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
    • 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
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
    • B32B27/365—Layered products comprising a layer of synthetic resin comprising polyesters comprising polycarbonates
    • 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
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
    • 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
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
    • H01L31/042—PV modules or arrays of single PV cells
    • H01L31/048—Encapsulation of modules
    • H01L31/0481—Encapsulation of modules characterised by the composition of the encapsulation material
    • 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
    • B32B2250/00—Layers arrangement
    • B32B2250/03—3 layers
    • 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
    • B32B2250/00—Layers arrangement
    • B32B2250/24—All layers being polymeric
    • B32B2250/246—All polymers belonging to those covered by groups B32B27/32 and B32B27/30
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/306—Resistant to heat
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B32B2307/416—Reflective
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/754—Self-cleaning
    • 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
    • B32B2457/00—Electrical equipment
    • B32B2457/12—Photovoltaic modules
    • 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 composite rear panel for solar cells. The composite rear panel sequentially comprises a first rear panel, a second rear panel and a third rear panel. Adhesion layers are further arranged between the first rear panel and the second rear panel and between the second rear panel and the third rear panel, and the first rear panel is adjacently connected with an EVA (ethylene vinyl acetate copolymer) adhesive membrane for the solar cells. The composite rear panel is characterized in that the first rear panel is a polyvinylidene fluoride membrane; the second rear panel is a polyethylene terephthalate membrane; the third rear panel is a polycarbonate-calcium fluoride-polyvinylidene fluoride composite membrane. The invention further provides a method for manufacturing the composite rear panel for the solar cells. According to the technical scheme, the composite rear panel and the method have the advantages that the composite rear panel for the solar cells is high in sunlight reflectivity, ultraviolet rays in air can be blocked, and the ageing resistance of the composite rear panel can be enhanced; infrared rays further can be diffused, accordingly, the temperature of the composite rear panel can be lowered, good radiating effects can be realized, and the service life of the composite rear panel can be prolonged.

Description

Solar cell compound backboard and preparation method thereof
Technical field
The present invention relates to technical field of solar batteries, particularly relate to a kind of solar cell compound backboard and preparation method thereof.
Background technology
Solar photovoltaic assembly is primarily of compositions such as glass cover-plate, ethylene-vinyl acetate copolymer (EVA), cell piece, backboard, terminal box and frames.Because backboard plays support and protective effect to cell piece; and backboard is as the direct encapsulating material with extraneous natural environment bump contact; its performance directly determines generating efficiency and the service life of photovoltaic module; backboard must possess excellent insulating properties, water vapor barrier property and weatherability etc., and therefore backboard performance is very important on the impact of solar photovoltaic assembly.Backboard is to battery, and power output, security reliability plays a key effect.The solar cell backboard of poor-performing uses 8 ~ 10 years under ordinary climate environment, under particular surroundings environment such as () plateau, island, wetlands, use 5 ~ 8 years, namely there is the bad phenomenon such as delamination, be full of cracks, foaming, flavescence, thus cause battery module to come off, cell piece slippage, the situation such as battery effective output reduction, even occur that electricity beats arc phenomenon, cause battery component to burn and inspire fire, the personnel that cause damage and property loss.
Existing backboard mainly with PETG (PET) for substrate, in its single or double compound or coating, there is functional fluorine material, thus make backboard have good barrier, weather-proof and insulating properties, therefore, the performance of the fluorine material outside substrate just seems particularly crucial.
Chinese patent 201110188877.4 discloses a kind of solar cell backboard, comprise gas barrier layer, resist processing layer and some outer covering layers, and have at least one deck outer covering layer to be the composite membrane be made up of polyimides and Teflon, described composite membrane can be fitted by polyimide film and Teflon film formed, also can be the co-extruded films of polyimides and Teflon, gas barrier layer effectively can intercept aqueous vapor, resist processing layer is suitable for laminating processing or provides buffering effect, polyimide resin has weather-proof character, gas barrier layer can be protected, Teflon then can block aqueous vapor and uvioresistant further, but solar cell backboard weak heat-dissipating prepared by the scheme of the prior art, stain resistance is poor, to a certain degree reducing service life of solar cell.
Chinese patent 201310719113.2 discloses a kind of solar cell backboard, comprise basic unit, described basic unit is plastic layer, the surface of described basic unit both sides is connected with resin bed respectively by adhesive layer, described resin layer surface is provided with diaphragm, described diaphragm comprises the silicon oxide coatings being arranged on described resin layer surface, described silicon oxide coatings surface is connected with film layer by another layer of adhesive layer, described plastic layer adopts polyethylene terephthalate, described resin bed is polyvinylidene fluoride resin layer, described adhesive layer is ethyl acetate layer, described film layer is polyimide film layer.Solar energy backboard hot strength prepared by the prior art is good, water vapor transmittance is high, percent thermal shrinkage is high, but still there is the problem such as weak heat-dissipating, stain resistance difference, and these all can affect the electric property of solar cell.
Visible, develop the solar cell backboard that a kind of intensity is high, water vapor rejection performance is good, uvioresistant, good heat dissipation, anti-soil can be good, become a technical problem.
Summary of the invention
For the weak heat-dissipating existed in prior art, stain resistance is poor, ageing resistance is not high problem, the invention provides a kind of solar cell compound backboard.Adopt technical scheme of the present invention, good, anti-aging, the corrosion resistant solar cell backboard of isolation performance can be prepared.
Technical scheme of the present invention is: a kind of solar cell compound backboard, comprise the first backboard successively, second backboard, the 3rd backboard, also there is tack coat between first backboard and the second backboard, between the second backboard and the 3rd backboard, the EVA adhesive film of the first backboard and solar cell adjoins, and it is characterized in that: described first backboard is polyvinylidene fluoride film; Described second backboard is poly terephthalic acid second two adipose membrane; Described 3rd backboard is the composite membrane of Merlon-calcirm-fluoride-Kynoar composition.
Further, the calcirm-fluoride in described 3rd backboard is nano calcium fluoride.
Further, the calcirm-fluoride in described 3rd backboard is by the modified nano calcium fluoride of hexafluoropropylene oxide oligomer type surfactant, titanate coupling agent, high molecular weight compatibilizer.
Further, described Merlon is coated on the surface of described type surfactant calcirm-fluoride, the structure that to be formed with calcirm-fluoride be core, Merlon is shell.
Further, as a kind of optional embodiment of the present invention, described first backboard also can carry out alternative polyvinylidene fluoride film with the composite membrane of Merlon-calcirm-fluoride-Kynoar composition.
Further, as a kind of optional embodiment of the present invention, in described solar cell compound backboard, also polyvinylidene fluoride film can be substituted with PVDF membrane.
The invention also discloses the preparation method of this solar cell compound backboard, it is characterized in that: comprise the following steps:
1) calcirm-fluoride modification: by nano calcium fluoride at 110 DEG C of dry 30min, then put into the container filling toluene solvant, after ultrasonic disperse 20min, add titanate coupling agent, keeping 3 hours in the water-bath of 100 DEG C, Temperature fall, suction filtration, dry, product is placed in drier for subsequent use;
2) calcirm-fluoride-Merlon compound particle is prepared: modified calcirm-fluoride is added deionized water, acroleic acid macromolecular compatilizer, hexafluoropropylene oxide oligomer type surfactant, stir 30min at normal temperatures, copolymer is uniformly dispersed, be warming up to 60 DEG C, at the uniform velocity drip polycarbonate monomer again, use mechanical agitation initiated polymerization simultaneously.After reaction terminates, Temperature fall to 30 DEG C, isolates product, then in thermostatic drying chamber in 50 DEG C of dry 4h, i.e. obtained calcirm-fluoride-Merlon compound particle;
3) composite membrane of Merlon-calcirm-fluoride-Kynoar composition is prepared: will calcirm-fluoride-Merlon compound particle be prepared and Kynoar pellet puts into high speed disintegrator with the ratio of weight ratio 0.5 ~ 1:9.5 ~ 9, Homogeneous phase mixing, then batch mixing is put into double screw extruder to extrude, casting film-forming; In described double screw extruder, screw zones temperature arranges 6 temperature ranges altogether from charging aperture to outlet opening, successively: 165 DEG C, 180 DEG C, 190 DEG C, 190 DEG C, 185 DEG C, 170 DEG C;
4) solar cell compound backboard is prepared: after the coated on both sides tack coat of the second backboard, after then the first backboard, the second backboard and the 3rd backboard being solidified by heat pressure adhesive, i.e. obtained solar cell compound backboard.
Wherein,
Step 1) in, the addition of described titanate coupling agent accounts for the 0.2-0.8% of nano calcium fluoride weight.
Step 2) in, described acroleic acid macromolecular compatilizer accounts for the 1.5-2.8% of nano calcium fluoride weight, is preferably 2.0%; Described hexafluoropropylene oxide oligomer type surfactant accounts for the 0.3-1.2% of nano calcium fluoride weight, is preferably 0.6%; That described calcirm-fluoride accounts for the gross weight of polycarbonate monomer is 3-6%, is preferably 5%.
Step 3) in, the thickness of the composite membrane casting film-forming of described Merlon-calcirm-fluoride-Kynoar composition is 20-45 μm, is preferably 30 μm.
Step 4) in the first backboard, the 3rd backboard thickness be 30 μ; The thickness of described second backboard is 200-300 μm, more preferably 250 μm; Described tack coat is vinyl acetate resin copolymer, and thickness is 8-12 μm.
Compared with prior art, the invention has the beneficial effects as follows:
(1) solar cell compound backboard provided by the invention, 3rd backboard adopts the composite membrane of Merlon-calcirm-fluoride-Kynoar composition, obtained solar energy composite back plate has the serviceability temperature of better mechanical property and Geng Gao, and there is stronger stain resistance, improve the service life of backboard.
(2) solar cell backboard adopting technical scheme of the present invention to prepare, water vapor erosiveness is strong, can not only high temperature resistant and low temperature resistant, decay resistance is strong.
(3) solar cell backboard adopting technical scheme of the present invention to prepare, the ability that flashes back the sunlight is strong, can ultraviolet in blocks air, enhance the ageing resistace of backboard, but also can scattering infrared ray, reduce the temperature of backboard, good heat dissipation effect, extend the service life of backboard.
Accompanying drawing explanation
Fig. 1 is solar cell compound back board structure schematic diagram provided by the invention;
Description of reference numerals in figure: the first backboard 1, second backboard 2, the 3rd backboard 3.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
Embodiment 1
As shown in Figure 1, a kind of solar cell compound backboard, comprises the first backboard 1, second backboard 2, the 3rd backboard 3 successively, between first backboard 1 and the second backboard 2, also have tack coat 4 between the second backboard 2 and the 3rd backboard 3, the first backboard 1 adjoins with the EVA adhesive film of solar cell.And the first backboard 1 is polyvinylidene fluoride film; Second backboard 2 is poly terephthalic acid second two adipose membrane; 3rd backboard 3 is the composite membrane of Merlon-calcirm-fluoride-Kynoar composition.
In addition, the calcirm-fluoride in described 3rd backboard 3 is nano calcium fluoride.This calcirm-fluoride is by the modified nano calcium fluoride of hexafluoropropylene oxide oligomer type surfactant, titanate coupling agent, high molecular weight compatibilizer.Merlon is coated on the surface of described type surfactant calcirm-fluoride, the structure that to be formed with calcirm-fluoride be core, Merlon is shell.
Solar cell compound backboard provided by the invention, 3rd backboard adopts the composite membrane of Merlon-calcirm-fluoride-Kynoar composition, obtained solar energy composite back plate has the serviceability temperature of better mechanical property and Geng Gao, and there is stronger stain resistance, improve the service life of backboard.
Embodiment 2
With reference to figure 1, a kind of solar cell compound backboard, comprises the first backboard 1, second backboard 2, the 3rd backboard 3 successively, between first backboard 1 and the second backboard 2, also have tack coat 4 between the second backboard 2 and the 3rd backboard 3, the first backboard 1 adjoins with the EVA adhesive film of solar cell.And the second backboard 2 is poly terephthalic acid second two adipose membrane; First backboard 1 and the 3rd backboard 3 are the composite membrane of Merlon-calcirm-fluoride-Kynoar composition,
In addition, the calcirm-fluoride in described first and third backboard 3 is nano calcium fluoride.This calcirm-fluoride is by the modified nano calcium fluoride of hexafluoropropylene oxide oligomer type surfactant, titanate coupling agent, high molecular weight compatibilizer.
Solar cell backboard prepared by the present invention, water vapor erosiveness is strong, can not only high temperature resistant and low temperature resistant, decay resistance is strong.
Embodiment 3
With reference to figure 1, a kind of solar cell compound backboard, comprises the first backboard 1, second backboard 2, the 3rd backboard 3 successively, between first backboard 1 and the second backboard 2, also have tack coat 4 between the second backboard 2 and the 3rd backboard 3, the first backboard 1 adjoins with the EVA adhesive film of solar cell.And the first backboard 1 is PVDF membrane; Second backboard 2 is poly terephthalic acid second two adipose membrane; 3rd backboard 3 is the composite membrane of Merlon-calcirm-fluoride-polyvinylidene fluoride composition.
In addition, the calcirm-fluoride in described 3rd backboard 3 is nano calcium fluoride.This calcirm-fluoride is by the modified nano calcium fluoride of hexafluoropropylene oxide oligomer type surfactant, titanate coupling agent, high molecular weight compatibilizer.
Embodiment 4
A preparation method for solar cell compound backboard, is characterized in that: comprise the following steps:
1) calcirm-fluoride modification: by nano calcium fluoride at 110 DEG C of dry 30min, then the container filling toluene solvant is put into, after ultrasonic disperse 20min, add titanate coupling agent (weight accounts for 0.5% of nano calcium fluoride weight), keeping 3 hours in the water-bath of 100 DEG C, Temperature fall, suction filtration, drying, is placed in drier by product for subsequent use;
2) calcirm-fluoride-Merlon compound particle is prepared: modified calcirm-fluoride is added deionized water, acroleic acid macromolecular compatilizer (accounting for 2.0% of nano calcium fluoride weight), hexafluoropropylene oxide oligomer type surfactant (accounting for 0.6% of nano calcium fluoride weight), stir 30min at normal temperatures, copolymer is uniformly dispersed, be warming up to 60 DEG C, at the uniform velocity drip polycarbonate monomer (calcirm-fluoride account for the gross weight of polycarbonate monomer be 5%) again, use mechanical agitation initiated polymerization simultaneously, after reaction terminates, Temperature fall to 30 DEG C, isolate product, then in thermostatic drying chamber in 50 DEG C of dry 4h, i.e. obtained calcirm-fluoride-Merlon compound particle,
3) composite membrane of Merlon-calcirm-fluoride-Kynoar composition is prepared: will calcirm-fluoride-Merlon compound particle be prepared and Kynoar pellet puts into high speed disintegrator with the ratio of weight ratio 0.5 ~ 1:9.5 ~ 9, Homogeneous phase mixing, then batch mixing is put into double screw extruder to extrude, casting film-forming, thickness is 30 μm; In double screw extruder, screw zones temperature arranges 6 temperature ranges altogether from charging aperture to outlet opening, successively: 165 DEG C, 180 DEG C, 190 DEG C, 190 DEG C, 185 DEG C, 170 DEG C;
4) solar cell compound backboard is prepared: after the coated on both sides tack coat vinyl acetate resin copolymer of the second backboard, then after the first backboard, the second backboard and the 3rd backboard being solidified by heat pressure adhesive, i.e. obtained solar cell compound backboard, wherein the thickness of the first backboard, the second backboard and the 3rd backboard is 30 μm, 250 μm, 30 μm successively; Adhesive layer thickness is 10 μm.
The solar cell backboard adopting technical scheme of the present invention to prepare, the ability that flashes back the sunlight is strong, can ultraviolet in blocks air, enhance the ageing resistace of backboard, but also can scattering infrared ray, reduce the temperature of backboard, good heat dissipation effect, extends the service life of backboard.
Above-mentioned explanation illustrate and describes the preferred embodiments of the present invention, as previously mentioned, be to be understood that the present invention is not limited to the form disclosed by this paper, should not regard the eliminating to other embodiments as, and can be used for other combinations various, amendment and environment, and can in invention contemplated scope described herein, changed by the technology of above-mentioned instruction or association area or knowledge.And the change that those skilled in the art carry out and change do not depart from the spirit and scope of the present invention, then all should in the protection domain of claims of the present invention.

Claims (10)

1. a solar cell compound backboard, comprise the first backboard (1) successively, second backboard (2), the 3rd backboard (3), between first backboard (1) and the second backboard (2), between the second backboard (2) and the 3rd backboard (3), also there is tack coat (4), first backboard (1) adjoins with the EVA adhesive film of solar cell, it is characterized in that: described first backboard (1) is polyvinylidene fluoride film; Described second backboard (2) is poly terephthalic acid second two adipose membrane; Described 3rd backboard (3) is the composite membrane of Merlon-calcirm-fluoride-Kynoar composition.
2. require the solar cell compound backboard described in 1 according to claim, its feature is being: the calcirm-fluoride in described 3rd backboard (3) is nano calcium fluoride.
3. require the solar cell compound backboard described in 2 according to claim, it is characterized in that: the calcirm-fluoride in described 3rd backboard (3) is by the modified nano calcium fluoride of hexafluoropropylene oxide oligomer type surfactant, titanate coupling agent, high molecular weight compatibilizer.
4. require the solar cell compound backboard described in 3 according to claim, it is characterized in that: described Merlon is coated on the surface of described type surfactant calcirm-fluoride, to be formed with calcirm-fluoride be core, structure that Merlon is shell.
5. require the solar cell compound backboard described in 1 according to claim, it is characterized in that: described first backboard (1) carrys out alternative polyvinylidene fluoride film with the composite membrane of Merlon-calcirm-fluoride-Kynoar composition.
6. require the solar cell compound backboard described in 1 according to claim, it is characterized in that: substitute polyvinylidene fluoride film with PVDF membrane.
7. a preparation method for solar cell compound backboard, is characterized in that: comprise the following steps:
1) calcirm-fluoride modification: by nano calcium fluoride at 110 DEG C of dry 30min, then put into the container filling toluene solvant, after ultrasonic disperse 20min, add titanate coupling agent, keeping 3 hours in the water-bath of 100 DEG C, Temperature fall, suction filtration, dry, product is placed in drier for subsequent use;
2) calcirm-fluoride-Merlon compound particle is prepared: modified calcirm-fluoride is added deionized water, acroleic acid macromolecular compatilizer, hexafluoropropylene oxide oligomer type surfactant, stir 30min at normal temperatures, copolymer is uniformly dispersed, be warming up to 60 DEG C, at the uniform velocity drip polycarbonate monomer again, use mechanical agitation initiated polymerization simultaneously, after reaction terminates, Temperature fall to 30 DEG C, isolate product, then in thermostatic drying chamber in 50 DEG C of dry 4h, i.e. obtained calcirm-fluoride-Merlon compound particle;
3) composite membrane of Merlon-calcirm-fluoride-Kynoar composition is prepared: will calcirm-fluoride-Merlon compound particle be prepared and Kynoar pellet puts into high speed disintegrator with the ratio that weight ratio is 0.5 ~ 1:9.5 ~ 9, Homogeneous phase mixing, then batch mixing is put into double screw extruder to extrude, casting film-forming;
4) solar cell compound backboard is prepared: after the coated on both sides tack coat (4) of the second backboard (2), then after the first backboard (1), the second backboard (2) and the 3rd backboard (3) being solidified by heat pressure adhesive, i.e. obtained solar cell compound backboard.
8. the preparation method of solar cell compound backboard according to claim 7, is characterized in that: described step 3) in, the thickness of the composite membrane casting film-forming of described Merlon-calcirm-fluoride-Kynoar composition is 20-45 μm.
9. the preparation method of solar cell compound backboard according to claim 7, it is characterized in that: described step 4) in the first backboard (1), the 3rd backboard (3) thickness be 30 μ, the thickness of described second backboard (2) is 200-300 μm.
10. the preparation method of solar cell compound backboard according to claim 7, is characterized in that: described tack coat (4) is vinyl acetate resin copolymer, and thickness is 8-12 μm.
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