CN105150645B - Compound backboard of solar cell and preparation method thereof - Google Patents
Compound backboard of solar cell and preparation method thereof Download PDFInfo
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- CN105150645B CN105150645B CN201510532378.0A CN201510532378A CN105150645B CN 105150645 B CN105150645 B CN 105150645B CN 201510532378 A CN201510532378 A CN 201510532378A CN 105150645 B CN105150645 B CN 105150645B
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- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- 150000001875 compounds Chemical class 0.000 title claims abstract description 4
- 239000002131 composite material Substances 0.000 claims abstract description 41
- 239000002033 PVDF binder Substances 0.000 claims abstract description 29
- 229920002981 polyvinylidene fluoride Polymers 0.000 claims abstract description 29
- 229920000515 polycarbonate Polymers 0.000 claims abstract description 24
- 239000012528 membrane Substances 0.000 claims abstract description 10
- 229920000139 polyethylene terephthalate Polymers 0.000 claims abstract description 8
- 239000005020 polyethylene terephthalate Substances 0.000 claims abstract description 8
- -1 polyethylene terephthalate Polymers 0.000 claims abstract description 7
- 239000000203 mixture Substances 0.000 claims abstract description 5
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 claims description 51
- 229910001634 calcium fluoride Inorganic materials 0.000 claims description 48
- 239000004417 polycarbonate Substances 0.000 claims description 23
- 229910052791 calcium Inorganic materials 0.000 claims description 20
- 239000011575 calcium Substances 0.000 claims description 20
- 238000001035 drying Methods 0.000 claims description 12
- 239000004094 surface-active agent Substances 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 9
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 9
- 239000011248 coating agent Substances 0.000 claims description 9
- 238000000576 coating method Methods 0.000 claims description 9
- 239000011246 composite particle Substances 0.000 claims description 9
- 239000007822 coupling agent Substances 0.000 claims description 9
- PGFXOWRDDHCDTE-UHFFFAOYSA-N hexafluoropropylene oxide Chemical compound FC(F)(F)C1(F)OC1(F)F PGFXOWRDDHCDTE-UHFFFAOYSA-N 0.000 claims description 9
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 6
- 229920001577 copolymer Polymers 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- 230000004048 modification Effects 0.000 claims description 5
- 238000012986 modification Methods 0.000 claims description 5
- 239000000178 monomer Substances 0.000 claims description 5
- 238000005266 casting Methods 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 4
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 239000008367 deionised water Substances 0.000 claims description 3
- 229910021641 deionized water Inorganic materials 0.000 claims description 3
- 239000008187 granular material Substances 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 238000006116 polymerization reaction Methods 0.000 claims description 3
- 238000000967 suction filtration Methods 0.000 claims description 3
- 238000010907 mechanical stirring Methods 0.000 claims description 2
- 238000010345 tape casting Methods 0.000 claims 1
- 230000017525 heat dissipation Effects 0.000 abstract description 7
- 230000032683 aging Effects 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 4
- 239000002313 adhesive film Substances 0.000 abstract description 2
- 239000004425 Makrolon Substances 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 24
- 239000005038 ethylene vinyl acetate Substances 0.000 description 7
- DQXBYHZEEUGOBF-UHFFFAOYSA-N but-3-enoic acid;ethene Chemical compound C=C.OC(=O)CC=C DQXBYHZEEUGOBF-UHFFFAOYSA-N 0.000 description 6
- 229920001721 polyimide Polymers 0.000 description 5
- 229920005989 resin Polymers 0.000 description 5
- 239000011347 resin Substances 0.000 description 5
- 239000004809 Teflon Substances 0.000 description 4
- 229920006362 Teflon® Polymers 0.000 description 4
- 239000012790 adhesive layer Substances 0.000 description 4
- 230000003373 anti-fouling effect Effects 0.000 description 4
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 2
- 239000004642 Polyimide Substances 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 230000006750 UV protection Effects 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 229910052731 fluorine Inorganic materials 0.000 description 2
- 239000011737 fluorine Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 230000004224 protection Effects 0.000 description 2
- 229910052814 silicon oxide Inorganic materials 0.000 description 2
- 229920002125 Sokalan® Polymers 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000003712 anti-aging effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005587 bubbling Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000032798 delamination Effects 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- ONIHPYYWNBVMID-UHFFFAOYSA-N diethyl benzene-1,4-dicarboxylate Chemical compound CCOC(=O)C1=CC=C(C(=O)OCC)C=C1 ONIHPYYWNBVMID-UHFFFAOYSA-N 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000005022 packaging material Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000009719 polyimide resin Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000004383 yellowing Methods 0.000 description 1
Classifications
-
- 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
-
- 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
-
- 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)
- Photovoltaic Devices (AREA)
- Laminated Bodies (AREA)
Abstract
Backboard is combined the invention provides a kind of solar cell, include the first backboard successively, the second backboard, the 3rd backboard also have tack coat between the first backboard and the second backboard, between the second backboard and the 3rd backboard, first backboard is abutted with the EVA adhesive film of solar cell, it is characterised in that：First backboard is polyvinylidene fluoride film；Second backboard is polyethylene terephthalate film；3rd backboard is the composite membrane of makrolon calcirm-fluoride Kynoar composition.Present invention also offers the preparation method of the compound backboard of the solar cell.The solar cell backboard prepared using technical scheme, reflection sunlight ability is strong, can stop the ultraviolet in air, the ageing resistace of backboard is enhanced, but also infrared ray can be scattered, reduce the temperature of backboard, good heat dissipation effect, extends the service life of backboard.
Description
Technical Field
The invention relates to the technical field of solar cells, in particular to a solar cell composite back plate and a preparation method thereof.
Background
The solar photovoltaic module mainly comprises a glass cover plate, ethylene-vinyl acetate copolymer (EVA), a battery piece, a back plate, a junction box, a frame and the like. Because the back plate plays supporting and protecting roles on the battery piece, and the back plate is used as a packaging material which is directly contacted with the external natural environment in a large area, the performance of the back plate directly determines the power generation efficiency and the service life of the photovoltaic module, and the back plate must have excellent insulativity, water vapor barrier property, weather resistance and the like, so the performance of the back plate is very important to the influence of the solar photovoltaic module. The backboard plays a key role in the service life, output power and safety and reliability of the battery. The solar cell backboard with poor performance is used for 8-10 years in a common climate environment and is used for 5-8 years in a special environment (such as a plateau environment, a sea island environment, a wetland environment and the like), so that adverse phenomena such as delamination, cracking, bubbling, yellowing and the like occur, the situations of battery module falling, battery piece sliding, battery effective output power reduction and the like are caused, even an electric arc striking phenomenon occurs, the battery assembly is caused to burn and fire is promoted, and personnel damage and property loss are caused.
The prior back plate mainly takes polyethylene terephthalate (PET) as a substrate, and a fluorine material with functionality is compounded or coated on one side or two sides of the substrate, so that the back plate has good barrier, weather resistance and insulating properties, and therefore, the performance of the fluorine-containing material outside the substrate is particularly critical.
Chinese patent 201110188877.4 discloses a solar cell backplate, including choke layer, resistant processing layer and a plurality of outer coating, and have at least one deck outer coating to be the complex film of being made by polyimide and teflon, the complex film can be laminated mutually by polyimide film and teflon membrane and constitute, also can be the coextrusion membrane of polyimide and teflon, the choke layer can effectively obstruct aqueous vapor, resistant processing layer is suitable for laminating processing or provides the cushioning effect, polyimide resin has weather resistance, can protect the choke layer, teflon then can further obstruct aqueous vapor and ultraviolet resistance, but the solar cell backplate heat dissipation of this prior art preparation is poor, the anti-soil ability is poor, has reduced solar cell's life to a certain extent.
Chinese patent 201310719113.2 discloses a solar cell backboard, which comprises a base layer, the base layer be the plastic layer, the surface of base layer both sides be connected with the resin layer through the bond line respectively, resin layer surface be equipped with the protection film, the protection film including setting up the silicon oxide coating on resin layer surface, silicon oxide coating surface be connected with the coating film layer through another layer of bond line, the plastic layer adopt poly diethyl terephthalate, the resin layer be polyvinylidene fluoride resin layer, the bond line be the ethyl acetate layer, the coating film layer be the polyimide film layer. The solar backboard prepared by the prior art has the advantages of good tensile strength, high water vapor permeability and high thermal shrinkage, but still has the problems of poor heat dissipation, poor anti-fouling capability and the like, which all affect the electrical performance of the solar battery.
Therefore, the development of the solar cell back plate with high strength, good water vapor barrier property, ultraviolet resistance, good heat dissipation and good stain resistance is a technical problem.
Disclosure of Invention
The invention provides a solar cell composite back plate, aiming at the problems of poor heat dissipation, poor anti-fouling capability and low anti-aging capability in the prior art. By adopting the technical scheme, the solar cell back plate with good isolation performance, ageing resistance and corrosion resistance can be prepared.
The technical scheme of the invention is as follows: the utility model provides a compound backplate of solar cell, includes first backplate, second backplate, third backplate in proper order, still has the tie coat between first backplate and the second backplate, between second backplate and the third backplate, and first backplate borders on its characterized in that with solar cell's EVA glued membrane: the first back plate is a polyvinylidene fluoride film; the second back plate is a polyethylene terephthalate film; the third back plate is a composite film consisting of polycarbonate-calcium fluoride-polyvinylidene fluoride.
Further, the calcium fluoride in the third back plate is nano calcium fluoride.
Further, the calcium fluoride in the third back plate is nano calcium fluoride modified by a hexafluoropropylene oxide oligomer surfactant, a titanate coupling agent and a high-molecular compatilizer.
Further, the polycarbonate is coated on the surface of the calcium fluoride type surfactant to form a structure with calcium fluoride as a core and polycarbonate as a shell.
Further, as an alternative embodiment of the present invention, the first back sheet may also replace the polyvinylidene fluoride film with a composite film composed of polycarbonate-calcium fluoride-polyvinylidene fluoride.
Further, as an optional embodiment of the present invention, in the solar cell composite back sheet, a polyvinylidene fluoride film may be used instead of the polyvinylidene fluoride film.
The invention also discloses a preparation method of the solar cell composite back plate, which is characterized by comprising the following steps: the method comprises the following steps:
1) modification of calcium fluoride: drying nano calcium fluoride at 110 ℃ for 30min, then placing the nano calcium fluoride into a container containing a toluene solvent, ultrasonically dispersing for 20min, then adding a titanate coupling agent, keeping the nano calcium fluoride in a water bath at 100 ℃ for 3 hours, naturally cooling, carrying out suction filtration, drying, and placing the product into a dryer for later use;
2) preparation of calcium fluoride-polycarbonate composite particles: adding the modified calcium fluoride into deionized water, an acrylic acid high-molecular compatilizer and a hexafluoropropylene oxide oligomer surfactant, stirring for 30min at normal temperature to uniformly disperse the copolymer, heating to 60 ℃, dropwise adding a polycarbonate monomer at a constant speed, and simultaneously, mechanically stirring to initiate polymerization reaction. After the reaction is finished, naturally cooling to 30 ℃, separating out a product, and then drying in a constant-temperature drying oven at 50 ℃ for 4 hours to obtain calcium fluoride-polycarbonate composite particles;
3) preparing a composite film consisting of polycarbonate, calcium fluoride and polyvinylidene fluoride: preparing calcium fluoride-polycarbonate composite particles and polyvinylidene fluoride granules in a weight ratio of 0.5-1: 9.5-9, uniformly mixing, putting the mixture into a double-screw extruder, extruding, and casting to form a film; the temperature of each section of screw rod in the double screw extruder is set up 6 temperature intervals from feed inlet to exit hole altogether, is in proper order: 165 ℃, 180 ℃, 190 ℃, 185 ℃ and 170 ℃;
4) preparing a solar cell composite back plate: and coating bonding layers on two sides of the second back plate, and then carrying out hot-press bonding and curing on the first back plate, the second back plate and the third back plate to obtain the solar cell composite back plate.
Wherein,
in the step 1), the addition amount of the titanate coupling agent accounts for 0.2-0.8% of the weight of the nano calcium fluoride.
In the step 2), the acrylic acid polymer compatilizer accounts for 1.5-2.8% of the weight of the nano calcium fluoride, and preferably accounts for 2.0%; the hexafluoropropylene oxide oligomer type surfactant accounts for 0.3-1.2% of the weight of the nano calcium fluoride, and is preferably 0.6%; the calcium fluoride accounts for 3 to 6 percent of the total weight of the polycarbonate monomer, and is preferably 5 percent.
In the step 3), the thickness of the casting film of the composite film consisting of the polycarbonate-calcium fluoride-polyvinylidene fluoride is 20-45 μm, preferably 30 μm.
The thickness of the first back plate and the third back plate in the step 4) is 30 mu; the thickness of the second back plate is 200-300 μm, and is further preferably 250 μm; the adhesive layer is a vinyl acetate copolymer, and the thickness of the adhesive layer is 8-12 mu m.
Compared with the prior art, the invention has the beneficial effects that:
(1) according to the solar cell composite back plate provided by the invention, the third back plate is the composite film consisting of the polycarbonate-calcium fluoride-polyvinylidene fluoride, so that the prepared solar cell composite back plate has better mechanical property and higher service temperature, has stronger anti-fouling capability and prolongs the service life of the back plate.
(2) The solar cell backboard prepared by the technical scheme of the invention has strong water vapor erosion resistance, high temperature resistance, low temperature resistance and strong corrosion resistance.
(3) The solar cell back plate prepared by the technical scheme of the invention has strong sunlight reflecting capacity, can block ultraviolet rays in the air, enhances the ageing resistance of the back plate, can scatter infrared rays, reduces the temperature of the back plate, has good heat dissipation effect and prolongs the service life of the back plate.
Drawings
FIG. 1 is a schematic structural view of a solar cell composite back sheet provided by the present invention;
the reference numbers in the figures illustrate: a first back plate 1, a second back plate 2 and a third back plate 3.
Detailed Description
The present invention will be described in further detail with reference to the following drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
As shown in fig. 1, a solar cell composite back plate sequentially comprises a first back plate 1, a second back plate 2 and a third back plate 3, wherein a bonding layer 4 is further arranged between the first back plate 1 and the second back plate 2 and between the second back plate 2 and the third back plate 3, and the first back plate 1 is adjacent to an EVA (ethylene vinyl acetate) adhesive film of a solar cell. Also, the first backsheet 1 is a polyvinylidene fluoride film; the second back plate 2 is a polyethylene terephthalate film; the third back plate 3 is a composite film composed of polycarbonate-calcium fluoride-polyvinylidene fluoride.
In addition, the calcium fluoride in the third back sheet 3 is nano calcium fluoride. The calcium fluoride is nano calcium fluoride modified by hexafluoropropylene oxide oligomer type surfactant, titanate coupling agent and polymer compatilizer.
The polycarbonate is coated on the surface of the calcium fluoride surfactant to form a structure taking the calcium fluoride as a core and the polycarbonate as a shell.
According to the solar cell composite back plate provided by the invention, the third back plate is the composite film consisting of the polycarbonate-calcium fluoride-polyvinylidene fluoride, so that the prepared solar cell composite back plate has better mechanical property and higher service temperature, has stronger anti-fouling capability and prolongs the service life of the back plate.
Example 2
Referring to fig. 1, a solar cell composite back plate sequentially includes a first back plate 1, a second back plate 2, and a third back plate 3, wherein a bonding layer 4 is further provided between the first back plate 1 and the second back plate 2, and between the second back plate 2 and the third back plate 3, and the first back plate 1 is adjacent to an EVA film of a solar cell. Moreover, the second back sheet 2 is a polyethylene terephthalate film; the first back plate 1 and the third back plate 3 are both composite films composed of polycarbonate-calcium fluoride-polyvinylidene fluoride,
in addition, the calcium fluoride in the first and third back plates 3 is nano calcium fluoride. The calcium fluoride is nano calcium fluoride modified by hexafluoropropylene oxide oligomer type surfactant, titanate coupling agent and polymer compatilizer.
The solar cell backboard prepared by the invention has strong water vapor erosion resistance, high temperature resistance, low temperature resistance and strong corrosion resistance.
Example 3
Referring to fig. 1, a solar cell composite back plate sequentially includes a first back plate 1, a second back plate 2, and a third back plate 3, wherein a bonding layer 4 is further provided between the first back plate 1 and the second back plate 2, and between the second back plate 2 and the third back plate 3, and the first back plate 1 is adjacent to an EVA film of a solar cell. Also, the first backsheet 1 is a polyvinylidene fluoride film; the second back plate 2 is a polyethylene terephthalate film; the third back plate 3 is a composite film composed of polycarbonate-calcium fluoride-polyvinylidene fluoride.
In addition, the calcium fluoride in the third back sheet 3 is nano calcium fluoride. The calcium fluoride is nano calcium fluoride modified by hexafluoropropylene oxide oligomer type surfactant, titanate coupling agent and polymer compatilizer.
Example 4
A preparation method of a solar cell composite back plate is characterized by comprising the following steps: the method comprises the following steps:
1) modification of calcium fluoride: drying nano calcium fluoride at 110 ℃ for 30min, then placing the nano calcium fluoride into a container filled with a toluene solvent, ultrasonically dispersing for 20min, adding a titanate coupling agent (the weight accounts for 0.5% of the weight of the nano calcium fluoride), keeping the mixture in a water bath at 100 ℃ for 3 hours, naturally cooling, carrying out suction filtration, drying, and placing a product in a dryer for later use;
2) preparation of calcium fluoride-polycarbonate composite particles: adding the modified calcium fluoride into deionized water, an acrylic acid high-molecular compatilizer (accounting for 2.0 percent of the weight of the nano calcium fluoride) and a hexafluoropropylene oxide oligomer type surfactant (accounting for 0.6 percent of the weight of the nano calcium fluoride), stirring at normal temperature for 30min to uniformly disperse a copolymer, heating to 60 ℃, dropwise adding a polycarbonate monomer (the calcium fluoride accounts for 5 percent of the total weight of the polycarbonate monomer) at a constant speed, simultaneously initiating a polymerization reaction by mechanical stirring, naturally cooling to 30 ℃ after the reaction is finished, separating out a product, and drying in a constant-temperature drying oven at 50 ℃ for 4h to obtain calcium fluoride-polycarbonate composite particles;
3) preparing a composite film consisting of polycarbonate, calcium fluoride and polyvinylidene fluoride: preparing calcium fluoride-polycarbonate composite particles and polyvinylidene fluoride granules in a weight ratio of 0.5-1: 9.5-9, uniformly mixing, putting the mixture into a double-screw extruder, extruding, and casting to form a film with the thickness of 30 microns; the temperature of each section of screw rod in the double screw extruder is arranged with 6 temperature intervals from the feed inlet to the outlet hole, which are sequentially as follows: 165 ℃, 180 ℃, 190 ℃, 185 ℃ and 170 ℃;
4) preparing a solar cell composite back plate: coating adhesive layer vinyl acetate copolymer on two sides of the second back plate, and then carrying out hot-pressing bonding and curing on the first back plate, the second back plate and the third back plate to obtain the solar cell composite back plate, wherein the thicknesses of the first back plate, the second back plate and the third back plate are 30 micrometers, 250 micrometers and 30 micrometers in sequence; the thickness of the adhesive layer was 10 μm.
The solar cell back plate prepared by the technical scheme of the invention has strong sunlight reflecting capacity, can block ultraviolet rays in the air, enhances the ageing resistance of the back plate, can scatter infrared rays, reduces the temperature of the back plate, has good heat dissipation effect and prolongs the service life of the back plate.
While the foregoing description shows and describes the preferred embodiments of the present invention, it is to be understood that the invention is not limited to the forms disclosed herein, but is not to be construed as excluding other embodiments and is capable of use in various other combinations, modifications, and environments and is capable of changes within the scope of the inventive concept as described herein, commensurate with the above teachings, or the skill or knowledge of the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (7)
1. The utility model provides a compound backplate of solar cell, includes first backplate (1), second backplate (2), third backplate (3) in proper order, still has tie coat (4) between first backplate (1) and second backplate (2), between second backplate (2) and third backplate (3), and first backplate (1) borders on its characterized in that with solar cell's EVA glued membrane: the first back plate (1) is a polyvinylidene fluoride membrane; the second back plate (2) is a polyethylene terephthalate film; the third back plate (3) is a composite film consisting of polycarbonate-calcium fluoride-polyvinylidene fluoride; the calcium fluoride in the third back plate (3) is nano calcium fluoride; the calcium fluoride in the third back plate (3) is nano calcium fluoride modified by a hexafluoropropylene oxide oligomer surfactant, a titanate coupling agent and a high-molecular compatilizer;
the polycarbonate is coated on the surface of the surfactant calcium fluoride to form a structure taking the calcium fluoride as a core and the polycarbonate as a shell.
2. The solar cell composite backsheet according to claim 1, wherein: the first back plate (1) replaces a polyvinylidene fluoride membrane with a composite membrane consisting of polycarbonate-calcium fluoride-polyvinylidene fluoride.
3. The solar cell composite backsheet according to claim 1, wherein: polyvinylidene fluoride membranes were used instead of polyvinylidene fluoride membranes.
4. A preparation method of a solar cell composite back plate is characterized by comprising the following steps: the method comprises the following steps:
1) modification of calcium fluoride: drying nano calcium fluoride at 110 ℃ for 30min, then placing the nano calcium fluoride into a container containing a toluene solvent, ultrasonically dispersing for 20min, then adding a titanate coupling agent, keeping the nano calcium fluoride in a water bath at 100 ℃ for 3 hours, naturally cooling, carrying out suction filtration, drying, and placing the product into a dryer for later use;
2) preparation of calcium fluoride-polycarbonate composite particles: adding the modified calcium fluoride into deionized water, an acrylic acid high-molecular compatilizer and a hexafluoropropylene oxide oligomer surfactant, stirring for 30min at normal temperature to uniformly disperse a copolymer, heating to 60 ℃, dropwise adding a polycarbonate monomer at a constant speed, simultaneously using mechanical stirring to initiate polymerization reaction, naturally cooling to 30 ℃ after the reaction is finished, separating a product, and drying for 4h at 50 ℃ in a constant-temperature drying oven to obtain calcium fluoride-polycarbonate composite particles;
3) preparing a composite film consisting of polycarbonate, calcium fluoride and polyvinylidene fluoride: preparing calcium fluoride-polycarbonate composite particles and polyvinylidene fluoride granules in a weight ratio of 0.5-1: 9.5-9, uniformly mixing, putting the mixture into a double-screw extruder, extruding, and casting to form a film;
4) preparing a solar cell composite back plate: and (3) coating the bonding layer (4) on two sides of the second back plate (2), and then carrying out hot-press bonding and curing on the first back plate (1), the second back plate (2) and the third back plate (3) to obtain the solar cell composite back plate.
5. The method for preparing a solar cell composite back sheet according to claim 4, wherein: in the step 3), the thickness of the tape-casting film of the composite film consisting of the polycarbonate-calcium fluoride-polyvinylidene fluoride is 20-45 μm.
6. The method for preparing a solar cell composite back sheet according to claim 4, wherein: the thicknesses of the first back plate (1) and the third back plate (3) in the step 4) are 30 μm, and the thickness of the second back plate (2) is 200-300 μm.
7. The method for preparing a solar cell composite back sheet according to claim 4, wherein: the bonding layer (4) is a vinyl acetate copolymer, and the thickness of the bonding layer is 8-12 mu m.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510532378.0A CN105150645B (en) | 2015-08-26 | 2015-08-26 | Compound backboard of solar cell and preparation method thereof |
| PCT/CN2015/093266 WO2017031827A1 (en) | 2015-08-26 | 2015-10-29 | Composite back sheet for solar cell and preparation method therefor |
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| CN201510532378.0A CN105150645B (en) | 2015-08-26 | 2015-08-26 | Compound backboard of solar cell and preparation method thereof |
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| CN105150645A CN105150645A (en) | 2015-12-16 |
| CN105150645B true CN105150645B (en) | 2017-06-06 |
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| CN109560157B (en) * | 2018-12-03 | 2019-11-05 | 常州回天新材料有限公司 | A kind of solar cell backboard |
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| WO1997010297A1 (en) * | 1995-09-12 | 1997-03-20 | Mitsui Petrochemical Industries, Ltd. | Adhesive ethylenic polymer resin composition and laminate produced from the composition |
| JP2006173545A (en) * | 2004-12-13 | 2006-06-29 | Sc Technology Kk | Solar cell structure and solar cell module structure having rare earth dope calcium fluoride layer |
| EP1818694A1 (en) * | 2006-02-14 | 2007-08-15 | DSMIP Assets B.V. | Picture frame with an anti reflective glass plate |
| JP4682368B2 (en) * | 2009-08-11 | 2011-05-11 | 独立行政法人産業技術総合研究所 | Spherical core-shell cerium oxide / polymer hybrid nanoparticle aggregate and method for producing the same |
| CN101645465A (en) * | 2009-08-31 | 2010-02-10 | 苏州福斯特光伏材料有限公司 | Solar cell module back veneer material |
| TWI541313B (en) * | 2011-08-31 | 2016-07-11 | 富士軟片股份有限公司 | Back sheet for solar cell and solar cell module |
| CN102922861A (en) * | 2012-10-10 | 2013-02-13 | 欧贝黎新能源科技股份有限公司 | Manufacturing process of composite solar cell backplane |
| CN102910832B (en) * | 2012-10-24 | 2018-05-22 | 广东工业大学 | A kind of preparation method of the hud typed heat-reflecting material of colour |
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| WO2017031827A1 (en) | 2017-03-02 |
| CN105150645A (en) | 2015-12-16 |
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