KR20130095537A - Solar battery module comprising high viscosity white eva resin layer - Google Patents
Solar battery module comprising high viscosity white eva resin layer Download PDFInfo
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- KR20130095537A KR20130095537A KR1020120017054A KR20120017054A KR20130095537A KR 20130095537 A KR20130095537 A KR 20130095537A KR 1020120017054 A KR1020120017054 A KR 1020120017054A KR 20120017054 A KR20120017054 A KR 20120017054A KR 20130095537 A KR20130095537 A KR 20130095537A
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- South Korea
- Prior art keywords
- solar cell
- eva resin
- encapsulant sheet
- cell module
- eva
- Prior art date
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- 229920005989 resin Polymers 0.000 title claims abstract description 40
- 239000011347 resin Substances 0.000 title claims abstract description 40
- 239000005038 ethylene vinyl acetate Substances 0.000 claims abstract description 60
- DQXBYHZEEUGOBF-UHFFFAOYSA-N but-3-enoic acid;ethene Chemical compound C=C.OC(=O)CC=C DQXBYHZEEUGOBF-UHFFFAOYSA-N 0.000 claims abstract description 57
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims abstract description 57
- 239000010954 inorganic particle Substances 0.000 claims abstract description 10
- 239000008393 encapsulating agent Substances 0.000 claims description 42
- 238000000034 method Methods 0.000 claims description 16
- 230000001681 protective effect Effects 0.000 claims description 16
- 239000000155 melt Substances 0.000 claims description 15
- 238000010030 laminating Methods 0.000 claims description 4
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims description 3
- 238000002844 melting Methods 0.000 claims 1
- 230000008018 melting Effects 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 13
- 239000011521 glass Substances 0.000 abstract description 5
- 238000002310 reflectometry Methods 0.000 abstract 1
- 239000011342 resin composition Substances 0.000 description 10
- 238000003475 lamination Methods 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 7
- 238000010248 power generation Methods 0.000 description 7
- 239000003431 cross linking reagent Substances 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 6
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 5
- 238000004132 cross linking Methods 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 229910000077 silane Inorganic materials 0.000 description 5
- 239000000758 substrate Substances 0.000 description 5
- 239000011230 binding agent Substances 0.000 description 4
- QIGBRXMKCJKVMJ-UHFFFAOYSA-N Hydroquinone Chemical compound OC1=CC=C(O)C=C1 QIGBRXMKCJKVMJ-UHFFFAOYSA-N 0.000 description 3
- 239000002671 adjuvant Substances 0.000 description 3
- 239000003963 antioxidant agent Substances 0.000 description 3
- 238000001125 extrusion Methods 0.000 description 3
- 150000001451 organic peroxides Chemical class 0.000 description 3
- 239000000049 pigment Substances 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 239000003381 stabilizer Substances 0.000 description 3
- AZQWKYJCGOJGHM-UHFFFAOYSA-N 1,4-benzoquinone Chemical compound O=C1C=CC(=O)C=C1 AZQWKYJCGOJGHM-UHFFFAOYSA-N 0.000 description 2
- UWNADWZGEHDQAB-UHFFFAOYSA-N 2,5-dimethylhexane Chemical compound CC(C)CCC(C)C UWNADWZGEHDQAB-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- XITRBUPOXXBIJN-UHFFFAOYSA-N bis(2,2,6,6-tetramethylpiperidin-4-yl) decanedioate Chemical compound C1C(C)(C)NC(C)(C)CC1OC(=O)CCCCCCCCC(=O)OC1CC(C)(C)NC(C)(C)C1 XITRBUPOXXBIJN-UHFFFAOYSA-N 0.000 description 2
- 239000003086 colorant Substances 0.000 description 2
- ZUOUZKKEUPVFJK-UHFFFAOYSA-N diphenyl Chemical compound C1=CC=CC=C1C1=CC=CC=C1 ZUOUZKKEUPVFJK-UHFFFAOYSA-N 0.000 description 2
- 125000000524 functional group Chemical group 0.000 description 2
- 239000001023 inorganic pigment Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- SSDSCDGVMJFTEQ-UHFFFAOYSA-N octadecyl 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate Chemical compound CCCCCCCCCCCCCCCCCCOC(=O)CCC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 SSDSCDGVMJFTEQ-UHFFFAOYSA-N 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000003566 sealing material Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- CNHDIAIOKMXOLK-UHFFFAOYSA-N toluquinol Chemical compound CC1=CC(O)=CC=C1O CNHDIAIOKMXOLK-UHFFFAOYSA-N 0.000 description 2
- NALFRYPTRXKZPN-UHFFFAOYSA-N 1,1-bis(tert-butylperoxy)-3,3,5-trimethylcyclohexane Chemical compound CC1CC(C)(C)CC(OOC(C)(C)C)(OOC(C)(C)C)C1 NALFRYPTRXKZPN-UHFFFAOYSA-N 0.000 description 1
- HSLFISVKRDQEBY-UHFFFAOYSA-N 1,1-bis(tert-butylperoxy)cyclohexane Chemical compound CC(C)(C)OOC1(OOC(C)(C)C)CCCCC1 HSLFISVKRDQEBY-UHFFFAOYSA-N 0.000 description 1
- ZNCDSAZBKYUMAB-UHFFFAOYSA-N 1,1-bis(tert-butylperoxy)octane Chemical compound CCCCCCCC(OOC(C)(C)C)OOC(C)(C)C ZNCDSAZBKYUMAB-UHFFFAOYSA-N 0.000 description 1
- KOMNUTZXSVSERR-UHFFFAOYSA-N 1,3,5-tris(prop-2-enyl)-1,3,5-triazinane-2,4,6-trione Chemical compound C=CCN1C(=O)N(CC=C)C(=O)N(CC=C)C1=O KOMNUTZXSVSERR-UHFFFAOYSA-N 0.000 description 1
- HQOVXPHOJANJBR-UHFFFAOYSA-N 2,2-bis(tert-butylperoxy)butane Chemical compound CC(C)(C)OOC(C)(CC)OOC(C)(C)C HQOVXPHOJANJBR-UHFFFAOYSA-N 0.000 description 1
- DMWVYCCGCQPJEA-UHFFFAOYSA-N 2,5-bis(tert-butylperoxy)-2,5-dimethylhexane Chemical compound CC(C)(C)OOC(C)(C)CCC(C)(C)OOC(C)(C)C DMWVYCCGCQPJEA-UHFFFAOYSA-N 0.000 description 1
- AWFYPPSBLUWMFQ-UHFFFAOYSA-N 2-[5-[2-(2,3-dihydro-1H-inden-2-ylamino)pyrimidin-5-yl]-1,3,4-oxadiazol-2-yl]-1-(1,4,6,7-tetrahydropyrazolo[4,3-c]pyridin-5-yl)ethanone Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)C1=NN=C(O1)CC(=O)N1CC2=C(CC1)NN=C2 AWFYPPSBLUWMFQ-UHFFFAOYSA-N 0.000 description 1
- IKEHOXWJQXIQAG-UHFFFAOYSA-N 2-tert-butyl-4-methylphenol Chemical compound CC1=CC=C(O)C(C(C)(C)C)=C1 IKEHOXWJQXIQAG-UHFFFAOYSA-N 0.000 description 1
- UUEWCQRISZBELL-UHFFFAOYSA-N 3-trimethoxysilylpropane-1-thiol Chemical compound CO[Si](OC)(OC)CCCS UUEWCQRISZBELL-UHFFFAOYSA-N 0.000 description 1
- DEXFNLNNUZKHNO-UHFFFAOYSA-N 6-[3-[4-[2-(2,3-dihydro-1H-inden-2-ylamino)pyrimidin-5-yl]piperidin-1-yl]-3-oxopropyl]-3H-1,3-benzoxazol-2-one Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)C1CCN(CC1)C(CCC1=CC2=C(NC(O2)=O)C=C1)=O DEXFNLNNUZKHNO-UHFFFAOYSA-N 0.000 description 1
- 239000004342 Benzoyl peroxide Substances 0.000 description 1
- OMPJBNCRMGITSC-UHFFFAOYSA-N Benzoylperoxide Chemical compound C=1C=CC=CC=1C(=O)OOC(=O)C1=CC=CC=C1 OMPJBNCRMGITSC-UHFFFAOYSA-N 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 239000006087 Silane Coupling Agent Substances 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 229910021417 amorphous silicon Inorganic materials 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 239000000981 basic dye Substances 0.000 description 1
- RWCCWEUUXYIKHB-UHFFFAOYSA-N benzophenone Chemical compound C=1C=CC=CC=1C(=O)C1=CC=CC=C1 RWCCWEUUXYIKHB-UHFFFAOYSA-N 0.000 description 1
- 239000012965 benzophenone Substances 0.000 description 1
- QRUDEWIWKLJBPS-UHFFFAOYSA-N benzotriazole Chemical compound C1=CC=C2N[N][N]C2=C1 QRUDEWIWKLJBPS-UHFFFAOYSA-N 0.000 description 1
- 239000012964 benzotriazole Substances 0.000 description 1
- 235000019400 benzoyl peroxide Nutrition 0.000 description 1
- 235000010290 biphenyl Nutrition 0.000 description 1
- 239000004305 biphenyl Substances 0.000 description 1
- FENNUTZYPOEXMW-UHFFFAOYSA-N bis(3,3,5,5-tetramethylpiperazin-1-yl) decanedioate Chemical compound C1C(C)(C)NC(C)(C)CN1OC(=O)CCCCCCCCC(=O)ON1CC(C)(C)NC(C)(C)C1 FENNUTZYPOEXMW-UHFFFAOYSA-N 0.000 description 1
- 238000003490 calendering Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 238000002845 discoloration Methods 0.000 description 1
- MCPKSFINULVDNX-UHFFFAOYSA-N drometrizole Chemical compound CC1=CC=C(O)C(N2N=C3C=CC=CC3=N2)=C1 MCPKSFINULVDNX-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- SBRXLTRZCJVAPH-UHFFFAOYSA-N ethyl(trimethoxy)silane Chemical compound CC[Si](OC)(OC)OC SBRXLTRZCJVAPH-UHFFFAOYSA-N 0.000 description 1
- NWVVVBRKAWDGAB-UHFFFAOYSA-N hydroquinone methyl ether Natural products COC1=CC=C(O)C=C1 NWVVVBRKAWDGAB-UHFFFAOYSA-N 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000012948 isocyanate Substances 0.000 description 1
- 150000002513 isocyanates Chemical class 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 229910021421 monocrystalline silicon Inorganic materials 0.000 description 1
- QUAMTGJKVDWJEQ-UHFFFAOYSA-N octabenzone Chemical compound OC1=CC(OCCCCCCCC)=CC=C1C(=O)C1=CC=CC=C1 QUAMTGJKVDWJEQ-UHFFFAOYSA-N 0.000 description 1
- 239000012860 organic pigment Substances 0.000 description 1
- QRMPKOFEUHIBNM-UHFFFAOYSA-N p-dimethylcyclohexane Natural products CC1CCC(C)CC1 QRMPKOFEUHIBNM-UHFFFAOYSA-N 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- IEQIEDJGQAUEQZ-UHFFFAOYSA-N phthalocyanine Chemical compound N1C(N=C2C3=CC=CC=C3C(N=C3C4=CC=CC=C4C(=N4)N3)=N2)=C(C=CC=C2)C2=C1N=C1C2=CC=CC=C2C4=N1 IEQIEDJGQAUEQZ-UHFFFAOYSA-N 0.000 description 1
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 150000003254 radicals Chemical class 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- CXVGEDCSTKKODG-UHFFFAOYSA-N sulisobenzone Chemical compound C1=C(S(O)(=O)=O)C(OC)=CC(O)=C1C(=O)C1=CC=CC=C1 CXVGEDCSTKKODG-UHFFFAOYSA-N 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000005341 toughened glass Substances 0.000 description 1
- 239000006097 ultraviolet radiation absorber Substances 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L31/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an acyloxy radical of a saturated carboxylic acid, of carbonic acid or of a haloformic acid; Compositions of derivatives of such polymers
- C08L31/02—Homopolymers or copolymers of esters of monocarboxylic acids
- C08L31/04—Homopolymers or copolymers of vinyl acetate
-
- 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
-
- 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
Description
The present invention relates to a solar cell module having excellent power generation efficiency.
Solar cells constitute the heart of a photovoltaic power generation system that converts solar energy directly into electricity, and are manufactured using single crystal, polycrystalline or amorphous silicon based semiconductors.
The solar cell is rarely used as it is, and it is generally wired in series or parallel with several to several solar cell elements, and the unit is packaged through various packaging to protect the cell for a long period of time. . The unit incorporated in this package is called a solar cell module.
Recently, solar cells are attracting attention due to environmental problems and energy problems. The solar cell module generally has the components as shown in Fig. Between the glass substrate as the front side transparent protective member and the back side protective film as the back side protective member, the sealing material sheet surrounds the solar cell for the solar cell module. Such a solar cell module is formed by laminating a glass substrate, an encapsulating material sheet, a solar cell, an encapsulating material sheet and a backing protective film in this order, and then heating and pressing the laminate to bond and cure the encapsulating material sheet.
The sealing process of the solar cell module is performed by applying pressure in the vertical direction when the sealing material sheet is completely melted by heating and pressurizing and degassing. At this time, the encapsulant sheet including the crosslinking agent is crosslinked by heat, and as a result, a solar cell module in which a solar cell is laminated between a glass substrate and a back protective film is manufactured.
In general, the encapsulant sheet for a solar cell module uses a sheet made of a transparent soft resin containing a crosslinking agent, and the main component of the resin is an ethylene-vinylacetate (EVA) copolymer. In this case, when a white EVA layer is formed by adding a white inorganic pigment to a transparent EVA layer and then applied as a back side encapsulating material sheet, the amount of light incident on the cell is increased by an increase in reflectance, The output increase effect can be expected.
However, the use of such a white EVA layer may cause a problem that the electrodes connecting the cells and the cells are buried in the white layer during the lamination process.
Conventionally, in order to solve such a problem, it has been introduced to use an encapsulant sheet including a white EVA layer and a transparent EVA layer in a laminated form, but in order to produce such an EVA laminated sheet, a process such as coextrusion is required. Not only is this complicated, it also makes it difficult to use existing equipment and increases costs. Further, since the transparent layer is added on the white layer, the entire cell is covered with the transparent EVA layer, and the increase of the reflectance is lowered, which may lead to a decrease in power generation efficiency of the module.
Accordingly, it is an object of the present invention to provide a solar cell module using a back side encapsulating material sheet to increase the reflectance and increase the amount of light incident on the cell, while preventing the electrodes connecting cells and cells from being buried.
In order to achieve the above object, the present invention provides a solar cell module manufactured by laminating a transparent protective member, a first encapsulant sheet, one or more solar cells connected to an electrode, a second encapsulant sheet, and a back protective film in order. The solar cell module of claim 2, wherein the second encapsulant sheet includes EVA resin and white inorganic particles having a melt flow rate (MFR) of 12 g / 10 min or less.
The solar cell module of the present invention uses a white backside encapsulant sheet manufactured by using an EVA resin having a high viscosity, thereby increasing the reflectance to increase the amount of light incident on the cell, while the cell and the electrode are formed by the white layer. It is possible to effectively prevent the buried to exhibit excellent power generation efficiency.
FIG. 1 is a schematic view showing a general solar cell module separated by constituent elements.
2 is a schematic view showing the structure of a general solar cell module in which a plurality of solar cells are wired in series or in parallel.
The solar cell module according to the present invention is processed by laminating a transparent protective member, a first encapsulant sheet, one or more solar cells connected to an electrode, a second encapsulant sheet, and a back protective film in order, and then processing (heating and pressing). In the manufactured solar cell module, the second encapsulant sheet is characterized in that it comprises EVA resin and white inorganic particles having a melt flow index of 12g / 10min or less.
The back side encapsulant sheet (second encapsulant sheet) of the solar cell module according to the present invention uses a high viscosity EVA resin while increasing the amount of light incident on the cell by increasing the reflectance by the action of the white EVA layer. And it is possible to effectively prevent the electrode is buried by the white layer to provide excellent power generation efficiency. In the present invention, a method of adjusting the melt flow index of the EVA resin is used as a method of increasing the viscosity of the white EVA resin layer used on the back surface side.
Typically, the melt flow index of the EVA resin used as a raw material of the encapsulant sheet used in the solar cell module is 15 to 45 g / 10 min. If the melt flow index of the EVA resin is higher than 45 g / 10min, the viscosity is low, the productivity of the encapsulant sheet may decrease, there is a risk that EVA resin flows out of the module during the lamination process.
However, when the melt flow index of the EVA resin is less than 15g / 10min, there is no difficulty in producing the encapsulant sheet and there is no problem in the lamination process. Therefore, in the present invention, 12 g / 10 min or less, for example, 1 to 10 g, as the second encapsulant sheet. 12 g / 10 min, more preferably 5 to 12 By using a white layer comprising an EVA resin and white inorganic particles having a melt flow index of g / 10 min, excellent power generation efficiency can be provided. In particular, when the melt flow index of the EVA resin is 10g / 10min or less, it is possible to almost completely block the phenomenon that the second encapsulant sheet covers the cell and the electrode.
In the solar cell module of the present invention, the first encapsulant sheet may preferably be a transparent layer containing EVA resin.
In addition, as the EVA resin constituting the first encapsulant sheet, a melt flow index of 45 g / 10 min or less, for example, a melt flow index of 15 to 45 g / 10 min, and more preferably a melt flow index of 33 to 45 g / 10 min. EVA resin having
As the white inorganic particles used in the white EVA layer as the second encapsulating material sheet, any white inorganic particles capable of increasing the reflectance and increasing the amount of light incident on the solar cell can be used, Titanium can be used. The titanium oxide preferably has an average particle diameter of 0.1 to 1 占 퐉, preferably 0.2 to 0.5 占 퐉. The white inorganic particles may be used in an amount of 1 to 15 parts by weight, preferably 3 to 10 parts by weight, based on 100 parts by weight of the EVA resin.
The manufacturing process of the solar cell module of the present invention is the same as the manufacturing process of a conventional solar cell module, it can be performed by sequentially including the following steps as an example:
(1) lamination of a transparent protective member (glass substrate) and a light receiving surface side EVA layer (first encapsulating material sheet);
(2) cell and electrode arrangement;
(3) lamination of the back side EVA layer (second encapsulant sheet);
(4) back protective film lamination; And
(5) Lamination proceeds in a batch.
2 shows a structure of a general solar cell module in which a plurality of solar cells manufactured thereby are wired in series or in parallel.
The lamination (heating, pressurization) may be performed by heating and pressurizing for 8 to 25 minutes at a temperature of 140 to 160 ° C and a press pressure of 0.5 to 1 atm by a vacuum laminator. However, the above conditions are only examples and conditions may vary depending on the EVA type.
In the present invention, the EVA resin composition for forming the first and / or second encapsulating material sheet may include a crosslinking agent for improving weather resistance. As the crosslinking agent, an organic peroxide which generates a radical at 100 占 폚 or higher is generally used, and in consideration of the stability at the time of mixing, it is preferable that the half life is 10 hours or more and the decomposition temperature is 70 占 폚 or more. Specific examples of such organic peroxides include 2,5-dimethylhexane, 2,5-dihydroperoxide, 2,5-dimethyl-2,5-di (t-butylperoxy) hexane, and 3-di- t-butyl peroxide, α, α'-bis (t-butylperoxyisopropyl) benzene, n-butyl-4,4-bis (t-butylperoxy) butane, 2,2-bis (t-butyl Peroxy) butane, 1,1-bis (t-butylperoxy) cyclohexane, 1,1-bis (t-butylperoxy) -3,3,5-trimethylcyclohexane, t-butylperoxybenzo Ethone, benzoyl peroxide and mixtures thereof. Such organic peroxide may be used in an amount of 5 parts by weight or less, preferably 0.3 to 2 parts by weight, based on 100 parts by weight of EVA resin.
The EVA resin composition may include a silane binder to improve adhesion to the solar cell. Specific examples of the silane coupling agent include? -Chloropropyltrimethoxysilane, vinyltriclorosilane, vinyl-tris- (? -Methoxyethoxy) silane,? -Methoxypropyltrimethoxysilane,? - (3,4-ethoxycyclohexyl) ethyltrimethoxysilane, gamma-mercaptopropyltrimethoxysilane, and mixtures thereof. Such silane binder may be used in an amount of 5 parts by weight or less, preferably 0.1 to 2 parts by weight, based on 100 parts by weight of EVA resin.
The EVA resin composition may include crosslinking aids to improve gel fraction and durability. As a crosslinking adjuvant, Crosslinking adjuvant which has three functional groups, such as a triallyl isocyanurate and a triallyl isocyanate; Or crosslinking adjuvant which has one functional group, such as ester, can be used. Such crosslinking aid may be used in an amount of 10 parts by weight or less, preferably 0.1 to 3 parts by weight, based on 100 parts by weight of EVA resin.
In addition, in order to improve the stability of the EVA resin, a stabilizer such as hydroquinone, hydroquinone methylethyl, p-benzoquinone, methyl hydroquinone, etc. is added to the EVA resin composition based on 100 parts by weight of the EVA resin, preferably 0.1 parts by weight. To 2 parts by weight.
Further, other colorants, ultraviolet absorbers, antioxidants, discoloration inhibitors, and the like may be added to the EVA resin composition, if necessary. Examples of the colorant include inorganic pigments such as metal oxides and metal powders; And organic pigments such as azo pigments, phthalocyanine pigments, acidic or basic dye lake pigments. Examples of the ultraviolet absorber include benzophenone such as 2-hydroxy-4-octoxybenzophenone and 2-hydroxy-4-methoxy-5-sulfobenzophenone; Benzotriazole systems such as 2- (2'-hydroxy-5-methylphenyl) benzotriazole; And salylate systems such as phenyl salylate and pt-butylphenyl salylate. Examples of the antioxidant include amine-based, phenol-based, and biphenyl-based antioxidants such as t-butyl-p-cresol, bis- (2,2,6,6-tetramethyl-4-piperazyl) sebacate .
Each of the first and / or second encapsulant sheets of the present invention can be produced by processing the EVA resin composition as described above to a thickness of 200 to 1000 탆 by a T-die extrusion or calendering process.
Each of the transparent protective member, the solar battery cell and the back surface protective film constituting the solar cell module of the present invention can be suitably selected from among commonly used ones.
The solar cell module of the present invention manufactured as described above includes a white backside encapsulant sheet manufactured using an EVA resin having a high viscosity, thereby increasing the reflectance and increasing the amount of light incident on the cell. Buried by the white layer can be effectively prevented to exhibit excellent power generation efficiency.
Hereinafter, the present invention will be described in more detail with reference to the following examples. However, the following examples are intended to illustrate the present invention, but the scope of the present invention is not limited thereto.
Examples 1 to 9 and Comparative Examples 1 to 3
Various solar cell modules were prepared as follows, wherein the EVA resin used as a raw material in each of the Examples and Comparative Examples was made of EVA resin (Mitsui-DuPont Chemical Co., Ltd.) having respective melt flow indexes as shown in Table 1 below. Used.
(a) Preparation of First Encapsulant Sheet
EVA resin composition (100 parts by weight of EVA resin; 1.5 parts by weight of Luporox101 from Alchema as a crosslinking agent; 0.5 parts by weight of Z-6030 from Dow-Corning as a silane binder; and 0.2 parts by weight of UV531 from Cytec Corp., Tinuvin770 from Ciba Specialty Chemicals as stabilizer. EVA resin composition prepared using a mixture of 0.2 parts by weight and 0.2 parts by weight of Irganox1076) The first encapsulant sheet having a thickness of 500 μm was prepared through a T-die extrusion process.
(b) Preparation of Second Encapsulant Sheet
EVA resin composition (100 parts by weight of EVA resin; 1.5 parts by weight of Luporox101 from Alchema as a crosslinking agent; 0.5 parts by weight of Z-6030 from Dow-Corning as a silane binder; and 0.2 parts by weight of UV531 from Cytec Corp., Tinuvin770 from Ciba Specialty Chemicals as stabilizer. A second encapsulation having a thickness of 500 μm through a T-die extrusion process using a composition in which 10 parts by weight of titanium oxide having an average particle diameter of 0.3 μm was added to an EVA resin composition prepared by using a mixture of 0.2 part by weight and 0.2 parts by weight of Irganox1076). Ash sheets were prepared.
(c) Lamination process
Low iron tempered glass substrate, the first encapsulant sheet manufactured in the step (a), the solar cell (Q6LM, Q-Cell company) electrode is connected, the second encapsulant sheet prepared in the step (b), and The rear protective film (Dunsolar 700, Dunmore, Inc.) was laminated in this order, and laminated (heated and pressed) for 15 minutes at a heating temperature of 150 ° C. and a press pressure of 1 atm to produce a solar cell module.
Test Example 1
The appearance of the solar cell module manufactured in the above Examples and Comparative Examples was observed, evaluated according to the following criteria, and the results are summarized in the following Table 1:
○: no phenomenon that the second encapsulant sheet covers the cell and the electrode
Δ: part of the second encapsulant covering the electrode (cell part is good)
X: the second encapsulant sheet covers part of the cell and electrode
As shown in Table 1, when the melt flow index of the EVA resin in the second encapsulant sheet is 12g / 10min or less as in Examples 1 to 9 of the present invention, there is no phenomenon in which the second encapsulant sheet covers the cell and the electrode. Although the cell part is good because it is insignificant even if it is not or partially covered, it can be seen that the second encapsulant sheet covers a part of the cell and the electrode when the melt flow index is greater than 12 g / 10 min, as in Comparative Examples 1 to 3. .
While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of limitation, It is to be understood that the invention may be practiced within the scope of the appended claims.
Claims (6)
The second encapsulant sheet includes a ethylene-vinylacetate (EVA) resin having a melting flow rate (MFR) of 12 g / 10 min or less and white inorganic particles.
The EVA resin constituting the second encapsulant sheet has a melt flow index of 1 to 12 g / 10 min.
The solar cell module, wherein the first encapsulant sheet is a transparent layer containing an EVA resin.
EVA resin constituting the first encapsulant sheet has a melt flow index of 15 to 45 g / 10min.
Wherein the white inorganic particles are titanium oxide having an average particle diameter of 0.1 to 1 占 퐉.
The second encapsulant sheet is a solar cell module comprising the white inorganic particles in an amount of 1 to 15 parts by weight based on 100 parts by weight of EVA resin.
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| KR1020120017054A KR20130095537A (en) | 2012-02-20 | 2012-02-20 | Solar battery module comprising high viscosity white eva resin layer |
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| KR1020120017054A KR20130095537A (en) | 2012-02-20 | 2012-02-20 | Solar battery module comprising high viscosity white eva resin layer |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018157640A1 (en) * | 2017-03-03 | 2018-09-07 | 杭州福斯特应用材料股份有限公司 | Highly reflective gain type photovoltaic packaging adhesive film and usage |
| CN110034209A (en) * | 2019-03-12 | 2019-07-19 | 浙江晶尚新能源科技有限公司 | The processing method for improving photovoltaic module white EVA adhesive film preparation qualification rate |
-
2012
- 2012-02-20 KR KR1020120017054A patent/KR20130095537A/en not_active Application Discontinuation
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018157640A1 (en) * | 2017-03-03 | 2018-09-07 | 杭州福斯特应用材料股份有限公司 | Highly reflective gain type photovoltaic packaging adhesive film and usage |
| CN110034209A (en) * | 2019-03-12 | 2019-07-19 | 浙江晶尚新能源科技有限公司 | The processing method for improving photovoltaic module white EVA adhesive film preparation qualification rate |
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