CN111635706A - PID (potential induced degradation) resistant packaging adhesive film for double-sided PREC (pre-positive electrode contact) battery and preparation method thereof - Google Patents
PID (potential induced degradation) resistant packaging adhesive film for double-sided PREC (pre-positive electrode contact) battery and preparation method thereof Download PDFInfo
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- CN111635706A CN111635706A CN202010537917.0A CN202010537917A CN111635706A CN 111635706 A CN111635706 A CN 111635706A CN 202010537917 A CN202010537917 A CN 202010537917A CN 111635706 A CN111635706 A CN 111635706A
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- adhesive film
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- pid
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- 239000002313 adhesive film Substances 0.000 title claims abstract description 49
- 238000004806 packaging method and process Methods 0.000 title claims abstract description 49
- 238000002360 preparation method Methods 0.000 title claims abstract description 8
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- 238000006731 degradation reaction Methods 0.000 title claims description 7
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- 239000003431 cross linking reagent Substances 0.000 claims abstract description 45
- 229920005989 resin Polymers 0.000 claims abstract description 40
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- 238000002844 melting Methods 0.000 claims description 15
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- DAKWPKUUDNSNPN-UHFFFAOYSA-N Trimethylolpropane triacrylate Chemical compound C=CC(=O)OCC(CC)(COC(=O)C=C)COC(=O)C=C DAKWPKUUDNSNPN-UHFFFAOYSA-N 0.000 description 1
- IAXXETNIOYFMLW-COPLHBTASA-N [(1s,3s,4s)-4,7,7-trimethyl-3-bicyclo[2.2.1]heptanyl] 2-methylprop-2-enoate Chemical compound C1C[C@]2(C)[C@@H](OC(=O)C(=C)C)C[C@H]1C2(C)C IAXXETNIOYFMLW-COPLHBTASA-N 0.000 description 1
- HVVWZTWDBSEWIH-UHFFFAOYSA-N [2-(hydroxymethyl)-3-prop-2-enoyloxy-2-(prop-2-enoyloxymethyl)propyl] prop-2-enoate Chemical compound C=CC(=O)OCC(CO)(COC(=O)C=C)COC(=O)C=C HVVWZTWDBSEWIH-UHFFFAOYSA-N 0.000 description 1
- XRMBQHTWUBGQDN-UHFFFAOYSA-N [2-[2,2-bis(prop-2-enoyloxymethyl)butoxymethyl]-2-(prop-2-enoyloxymethyl)butyl] prop-2-enoate Chemical compound C=CC(=O)OCC(COC(=O)C=C)(CC)COCC(CC)(COC(=O)C=C)COC(=O)C=C XRMBQHTWUBGQDN-UHFFFAOYSA-N 0.000 description 1
- YKTSYUJCYHOUJP-UHFFFAOYSA-N [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] Chemical compound [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] YKTSYUJCYHOUJP-UHFFFAOYSA-N 0.000 description 1
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical class [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- FQUNFJULCYSSOP-UHFFFAOYSA-N bisoctrizole Chemical compound N1=C2C=CC=CC2=NN1C1=CC(C(C)(C)CC(C)(C)C)=CC(CC=2C(=C(C=C(C=2)C(C)(C)CC(C)(C)C)N2N=C3C=CC=CC3=N2)O)=C1O FQUNFJULCYSSOP-UHFFFAOYSA-N 0.000 description 1
- 239000013522 chelant Substances 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 229940119545 isobornyl methacrylate Drugs 0.000 description 1
- 239000012948 isocyanate Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 125000004108 n-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- DXGLGDHPHMLXJC-UHFFFAOYSA-N oxybenzone Chemical compound OC1=CC(OC)=CC=C1C(=O)C1=CC=CC=C1 DXGLGDHPHMLXJC-UHFFFAOYSA-N 0.000 description 1
- FJKROLUGYXJWQN-UHFFFAOYSA-N papa-hydroxy-benzoic acid Natural products OC(=O)C1=CC=C(O)C=C1 FJKROLUGYXJWQN-UHFFFAOYSA-N 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000002161 passivation Methods 0.000 description 1
- 229940057847 polyethylene glycol 600 Drugs 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- GHJOIQFPDMIKHT-UHFFFAOYSA-N propane-1,2,3-triol;prop-2-enoic acid Chemical class OC(=O)C=C.OCC(O)CO GHJOIQFPDMIKHT-UHFFFAOYSA-N 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 229960004889 salicylic acid Drugs 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 150000003384 small molecules Chemical class 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- MPIBCHJSJHJLRX-UHFFFAOYSA-M sodium;2-tetracosylbenzenesulfonate Chemical compound [Na+].CCCCCCCCCCCCCCCCCCCCCCCCC1=CC=CC=C1S([O-])(=O)=O MPIBCHJSJHJLRX-UHFFFAOYSA-M 0.000 description 1
- OJYOHZRKHKZHFW-UHFFFAOYSA-N sodium;tetracosyl benzenesulfonate Chemical compound [Na].CCCCCCCCCCCCCCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 OJYOHZRKHKZHFW-UHFFFAOYSA-N 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
- CIHOLLKRGTVIJN-UHFFFAOYSA-N tert-Butyl hydroperoxide Substances CC(C)(C)OO CIHOLLKRGTVIJN-UHFFFAOYSA-N 0.000 description 1
- GSECCTDWEGTEBD-UHFFFAOYSA-N tert-butylperoxycyclohexane Chemical compound CC(C)(C)OOC1CCCCC1 GSECCTDWEGTEBD-UHFFFAOYSA-N 0.000 description 1
- NBXZNTLFQLUFES-UHFFFAOYSA-N triethoxy(propyl)silane Chemical compound CCC[Si](OCC)(OCC)OCC NBXZNTLFQLUFES-UHFFFAOYSA-N 0.000 description 1
- PKYCTRXXOZUHFK-UHFFFAOYSA-N tris(1,2,2,6,6-pentamethylpiperidin-4-yl) phosphite Chemical compound C1C(C)(C)N(C)C(C)(C)CC1OP(OC1CC(C)(C)N(C)C(C)(C)C1)OC1CC(C)(C)N(C)C(C)(C)C1 PKYCTRXXOZUHFK-UHFFFAOYSA-N 0.000 description 1
- 229940070710 valerate Drugs 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/10—Adhesives in the form of films or foils without carriers
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/04—Non-macromolecular additives inorganic
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/06—Non-macromolecular additives organic
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J123/00—Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers
- C09J123/02—Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers not modified by chemical after-treatment
- C09J123/04—Homopolymers or copolymers of ethene
- C09J123/08—Copolymers of ethene
- C09J123/0846—Copolymers of ethene with unsaturated hydrocarbons containing other atoms than carbon or hydrogen atoms
- C09J123/0853—Vinylacetate
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/014—Additives containing two or more different additives of the same subgroup in C08K
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/10—Transparent films; Clear coatings; Transparent materials
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2203/00—Applications of adhesives in processes or use of adhesives in the form of films or foils
- C09J2203/33—Applications of adhesives in processes or use of adhesives in the form of films or foils for batteries or fuel cells
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2423/00—Presence of polyolefin
- C09J2423/04—Presence of homo or copolymers of ethene
-
- 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
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- 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)
- Inorganic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Laminated Bodies (AREA)
Abstract
The invention relates to the technical field of packaging adhesive films, in particular to a PID (proportion integration differentiation) resistant packaging adhesive film for a double-sided PREC (pre-compressed acrylic) battery and a preparation method thereof, wherein the packaging adhesive film comprises an upper polarization resistant transparent EVA layer and a lower rapid curing high-cut-off transparent EVA layer, and the polarization resistant transparent EVA layer comprises the following components in percentage by mass: the content of ethylene-vinyl acetate copolymer resin is 80-89%, the content of antioxidant is 0.01-1%, the content of light stabilizer is 0.01-1%, the content of cross-linking agent is 1-2%, the content of silane coupling agent is 0.1-2%, the content of inorganic anti-polarization material is 0.5-2%, and the content of organic anti-polarization material is 2-8%; the PID-resistant packaging adhesive film for the double-sided PERC battery has the characteristics of good PID-resistant effect on a single-sealed component of the double-sided PREC battery and good component reliability, and meanwhile, a fast curing crosslinking system is adopted, so that the laminating time of the component can be effectively shortened, the production efficiency of the component end is greatly increased, and in addition, the material cost selected by the co-extrusion adhesive film is lower, and the photovoltaic flat-price internet access can be promoted.
Description
Technical Field
The invention relates to the technical field of packaging adhesive films, in particular to a PID (potential induced degradation) resistant packaging adhesive film for a double-sided PREC (pre-positive electrode contact) battery and a preparation method thereof.
Background
In recent decades, the development of the photovoltaic industry in China has been very rapid due to the technical progress and the influence of the national photovoltaic policy. Since the photovoltaic flat price is on the internet, the photovoltaic industry has higher and higher requirements on cost reduction and efficiency improvement. With the rapid development of battery terminal technology, the manufacturing cost of the double-sided PERC battery is lower than that of a battery with a single-sided aluminum back field, and meanwhile, the efficiency of the battery on the front side of the double-sided PERC battery is higher than that of a common single-sided battery, so that assembly terminal manufacturers adopt a single-sealing mode of the double-sided PERC battery to manufacture common single-glass assemblies. However, the PID attenuation mechanism of the double-sided battery is greatly different from that of the conventional single-sided battery, the attenuation of the double-sided battery is mainly due to power attenuation caused by charge accumulation of a back passivation layer, and the conventional single-sided battery is also mainly due to power attenuation caused by the fact that metal sodium particles enter a P-N junction of the battery under negative bias voltage. Therefore, the conventional common EVA adhesive film and the conventional white EVA adhesive film cannot meet the requirement of PID (proportion integration differentiation) resistance of the single-sealed assembly of the double-sided battery.
Meanwhile, in order to effectively solve the problem of PID power attenuation of the double-sided battery in a single-sealing mode, a polyolefin PO (polyolefin) adhesive film or a co-extrusion type EPE (ethylene propylene) adhesive film is generally adopted at the current assembly end. However, these types of adhesive films have high price due to high cost of PO raw materials, low productivity and efficiency in the production and manufacturing process, large investment of co-extrusion equipment and the like. Meanwhile, the low crosslinking activity of the PO adhesive film leads to longer laminating time of the assembly end, the laminating efficiency of the assembly is reduced, and the productivity of the assembly end is seriously influenced. Therefore, the anti-PID packaging adhesive film for single packaging of the double-sided PERC battery with low cost and high laminating efficiency is researched to become a product urgently needed by the market at present.
Disclosure of Invention
The purpose of the invention is: the defect in the prior art is overcome, and the PID-resistant packaging adhesive film for the double-sided PREC battery is low in production cost, high in production efficiency and excellent in PID resistance.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a double-sided PREC cell is with anti PID encapsulation glued membrane, the encapsulation glued membrane includes transparent EVA layer of upper strata anti polarization and the transparent EVA layer of lower floor fast curing high cut-off.
Furthermore, the upper-layer anti-polarization transparent EVA is a casting composite layer, the thickness of the upper-layer anti-polarization transparent EVA is 150-300 mu m, the thickness of the lower-layer rapidly cured high-cut-off transparent EVA layer is 200-700 mu m, and the total thickness of the packaging adhesive film is 350-800 mu m.
Further, the polarization-resistant transparent EVA layer comprises the following components in percentage by mass: the content of the ethylene-vinyl acetate copolymer resin is 89-95%, the content of the antioxidant is 0.01-1%, the content of the light stabilizer is 0.01-1%, the content of the cross-linking agent is 1-2%, the content of the silane coupling agent is 0.1-2%, the content of the inorganic anti-polarization material is 0.5-2%, and the content of the organic anti-polarization material is 2-8%.
Further, the ethylene-vinyl acetate copolymer resin contains 14-26% of vinyl acetate, the melt flow rate of the ethylene-vinyl acetate copolymer resin is 2.5g/10 min-40 g/10min, and the volume resistivity is more than or equal to 1 x 1014The melting temperature is 70-100 ℃.
Further, the inorganic anti-polarization material comprises nano potassium aluminum silicate, fumed silica or Na subjected to organic coating treatment on the surface+、K+、Mg2+、Ba2+、Al3+、Zn3+One or more of silicate and borosilicate according to any proportion.
Further, the organic anti-polarization material comprises one or more of phosphoric acid monoester ether, stearate, N-bis (2-hydroxyethyl) alkylamine, N- (3-dodecyloxy-2-hydroxypropyl) ethanolamine, a synthetic mixture of ethoxylated amine and glyceride, a hydroxyl-containing acrylic acid small molecule prepolymer, glycerol (12-hydroxyl) monostearate, sodium tetracosylbenzenesulfonate, (3-lauramidopropyl) trimethyl methyl sulfate amine, a polyether small molecule prepolymer with a C-O-C repeating structure, and a five-membered ring polymer and a six-membered ring polymer with a long alkyl chain, which are mixed according to any proportion.
The antioxidant comprises a main antioxidant and an auxiliary antioxidant, wherein the main antioxidant is one or two of beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) octadecyl propionate and triglycerol bis-3- (3-tert-butyl-4-hydroxy-5-toluenyl) acrylate; the auxiliary antioxidant is one or more of tris (2, 4-di-tert-butylphenyl) phosphite, 2, 6-di-tert-butyl-p-cresol, triphenyl phosphite, tetrakis (2, 4-di-tert-butylphenyl-4, 4-biphenyl) bisphosphate and triethylene glycol bis-3- (3-tert-butyl-4-hydroxy-5-tolylphenyl) acrylate, and is preferably a complex of triphenyl phosphite and tris (2, 4-di-tert-butylphenyl) phosphite.
The light stabilizer is one of 2-hydroxy-4-dodecyloxy benzophenone, a polymer of succinic acid and 4-hydroxy-2, 2,6, 6-tetramethyl-1-pyridylethanol, 3,5 di-tert-butyl-4-hydroxy-benzoic acid hexadecyl ester, 2-hydroxy-4-methoxybenzophenone, 2-hydroxy-4-n-octyloxy benzophenone, 2-hydroxy-4-octadecyloxybenzophenone and 2- (2-hydroxy-5-tert-octylphenyl). Preferably a combination of hexadecyl 3, 5-di-tert-butyl-4-hydroxy-benzoate and 2-hydroxy-4-n-octoxybenzophenone.
The crosslinking agent comprises a crosslinking curing agent and an auxiliary crosslinking agent, wherein the crosslinking curing agent comprises organic peroxide and/or azo compound, the organic peroxide comprises one or more of tert-amyl peroxy-2-ethylhexyl carbonate, 1-bis (tert-butyl peroxy) cyclohexane, di-tert-butyl peroxide, diisopropylbenzene hydroperoxide, 1-bis (tert-butyl peroxy) -3,3, 5-trimethylcyclohexane, n-butyl 4, 4-di (tert-amyl peroxy) valerate, tert-butyl peroxy-2-ethylhexyl carbonate and ethyl 3, 3-di (tert-butyl peroxy) butyrate; the auxiliary crosslinking agent comprises one or a mixture of more of tri (2-hydroxyethyl) isocyanuric acid triacrylate, triallyl cyanurate, isobornyl methacrylate, ethoxylated pentaerythritol tetraacrylate, propoxylated pentaerythritol tetraacrylate, trimethylolpropane trimethacrylate, diethylene glycol dimethacrylate, polyethylene glycol 200 diacrylate, tetraethylene glycol dimethacrylate, 15 (ethoxy) trimethylolpropane triacrylate, polyethylene glycol 400 diacrylate, polyethylene glycol 600 diacrylate, polyethylene glycol 200 dimethacrylate, polyethylene glycol 400 dimethacrylate, 1, 6-hexanediol dimethacrylate and acrylate glycerol derivatives.
The silane coupling agent is at least one of vinyl triethoxysilane, vinyl trimethoxysilane, vinyl tri-tert-butyl hydroperoxide silane, gamma-mercaptopropyl trimethoxysilane, vinyl tri (beta-methoxyethoxy) silane, gamma-isocyanate propyl triethoxysilane, gamma-mercaptopropyl triethoxysilane, vinyl triacetoxysilane and gamma-glycidyl ether oxypropyltrimethoxysilane.
Further, the fast curing high cut-off transparent EVA layer comprises the following components in percentage by mass: the low melting point means that the content of the ethylene-vinyl acetate copolymer resin is 90 to 98 percent, the content of the antioxidant is 0.01 to 3 percent, the content of the cross-linking agent is 0.2 to 4 percent, the content of the silane coupling agent is 0.1 to 4.1 percent, the content of the light stabilizer is 0.01 to 2 percent, and the content of the ultraviolet cut-off agent is 0.01 to 1 percent.
Further, the low melting point means that the molar content of vinyl acetate in the ethylene-vinyl acetate copolymer resin is 18-55%, and the melt flow rate of the low melting point means that the ethylene-vinyl acetate copolymer resin is 0.3g/10 min-15 g/10 min.
The antioxidant comprises a main antioxidant and an auxiliary antioxidant, wherein the main antioxidant is beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) octadecyl propionate; the auxiliary antioxidant is one or more of tris (2, 4-di-tert-butylphenyl) phosphite, 2, 6-di-tert-butyl-p-cresol and triethylene glycol bis-3- (3-tert-butyl-4-hydroxy-5-methylphenyl) acrylate, and is preferably a compound of tris (4-nonylphenol) phosphite and tris (2, 4-di-tert-butylphenyl) phosphite.
The light stabilizer is one of 2-hydroxy-4-dodecyloxy benzophenone, tris (1, 2,2,6, 6-pentamethyl-4-piperidyl) -phosphite ester, 2-hydroxy-4-octadecyloxybenzophenone, bis (2,2,6, 6-tetramethylpiperidyl) sebacate, a polymer of succinic acid and 4-hydroxy-2, 2,6, 6-tetramethyl-1-piperidine ethanol and 4-benzoyloxy-2, 2,6, 6-tetramethylpiperidine. Bis (2,2,6, 6-tetramethylpiperidinyl) sebacate is preferred.
The ultraviolet light absorber is one or more of 2, 2-dihydroxy-4-methoxybenzophenone, 2-hydroxy-4-methoxy-5-sulfobenzophenone, 2-hydroxy-4-n-octoxybenzophenone, salicylic acid, 2-benzotriazole-2-yl-4, 6-di-tert-butylphenol, 2- (2H-phenylpropyl benzotriazole-2-hydroxy) -4- (tert-butyl-6-sec-butyl) phenol and 2, 2' -methylenebis (6- (2H-benzotriazole-2-yl) -6-dodecyl-4-methylphenol.
The crosslinking agent comprises a crosslinking curing agent and an auxiliary crosslinking agent, wherein the crosslinking curing agent comprises organic peroxide and/or azo compound, the organic peroxide comprises one or more of 1, 1-bis (tert-butylperoxy) cyclohexane, di-tert-butyl peroxide, diisopropylbenzene hydroperoxide, 1-bis (tert-butylperoxy) -3,3, 5-trimethylcyclohexane, 4-di (tert-amylperoxy) n-butyl valerate, tert-butyl peroxy 2-ethylhexyl carbonate, tert-amyl peroxy 2-ethylhexyl carbonate, tert-butyl peroxyisobutyrate and ethyl 3, 3-di (tert-butylperoxy) butyrate; the auxiliary crosslinking agent comprises one or more of triallyl isocyanurate, triallyl cyanurate, trimethylolpropane trimethacrylate, trimethylolpropane triacrylate, pentaerythritol triacrylate, dipentaerythritol hexaacrylate, ditrimethylolpropane tetraacrylate, ethoxylated pentaerythritol tetraacrylate, 2 moles of caprolactone-modified dipentaerythritol hexaacrylate and 6 moles of caprolactone-modified dipentaerythritol hexaacrylate.
The silane coupling agent is at least one of vinyl triethoxysilane, vinyl trimethoxysilane, vinyl tri-tert-butyl peroxide silane, gamma-mercaptopropyl trimethoxysilane, vinyl tri (beta-methoxyethoxy) silane and gamma-mercaptopropyl triethoxysilane.
Another object of the invention is: the defect in the prior art is overcome, and the PID-resistant packaging adhesive film for the double-sided PREC battery is low in production cost, high in production efficiency and excellent in PID resistance.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a preparation method of a PID (potential induced degradation) resistant packaging adhesive film for a double-sided PREC battery is characterized by comprising the following steps of: the preparation method comprises the following steps:
1) adding ethylene-vinyl acetate copolymer (with the VA content of 14-26%), antioxidant, light stabilizer, organic and inorganic anti-polarization auxiliary agent, crosslinking agent and silane coupling agent into a high-speed mixer in proportion, fully mixing for 45-75 min, and pouring into an extruder for later use;
2) then adding the low-melting ethylene-vinyl acetate copolymer resin (with the VA content of 26-55%), the antioxidant, the crosslinking agent, the silane coupling agent, the light stabilizer and the ultraviolet cut-off agent into a high-speed mixer in proportion, fully mixing for 45-75 min, and pouring into another extruder for later use;
3) and simultaneously starting two single-screw extruders, extruding at 65-100 ℃, simultaneously extruding and embossing two materials from the same double-layer co-extrusion die head, and compounding to prepare the high-efficiency low-cost PID (potential induced degradation) resistant packaging adhesive film for the double-sided PREC battery.
The technical scheme adopted by the invention has the beneficial effects that:
the anti-PID packaging adhesive film for the double-sided PERC battery reduces charge accumulation on the silicon nitride surface of the PERC battery under negative bias by adding the organic anti-polarization material, and the addition of organic micromolecules is easy to disperse and absorb in EVA resin, so that the anti-polarization dispersion uniformity of the PERC battery is facilitated, and no shadow exists on the light transmittance of the adhesive film; meanwhile, the inorganic anti-polarization material is added to capture metal ions and effectively chelate partial positive charges, so that the charge accumulation on the surface of the double-sided battery is reduced, and the power loss of the PID test of the double-sided component is reduced. And because the addition of the inorganic material has better polarization resistance effect and better sustainability of chelating metal ions, and has better weather resistance and timeliness compared with an organic carrier, the anti-PID effect on the double-sided PREC battery single-seal component has longer timeliness, thereby greatly increasing the reliability of the component in the using process. Meanwhile, a rapid curing crosslinking system is adopted, so that the laminating time of the assembly can be effectively shortened, and the production efficiency of the assembly end is greatly improved. In addition, the co-extrusion adhesive film is made of a selected material with lower cost, and has lower manufacturing cost compared with the current market polyolefin adhesive film with double-sided PERC and PID resistance or the conventional three-layer co-extrusion production, thereby being more beneficial to promoting the photovoltaic flat-price internet surfing.
Detailed Description
The following examples are intended to provide those skilled in the art with a more complete understanding of the present invention, and are not intended to limit the scope of the present invention. Reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic may be included in at least one implementation of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.
Example 1
The first step of the formula design of the transparent anti-polarization EVA layer is as follows:
main materials: the ethylene-vinyl acetate copolymer (EVA) is prepared by mixing EVA resin with the VA content of 18% and EVA resin with the VA content of 26% according to the weight ratio of 1:1.
Antioxidant: the main antioxidant is beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid octadecyl ester, and the auxiliary antioxidant is tris (4-nonylphenol) phosphite and tris (2, 4-di-tert-butylphenyl) phosphite which are mixed according to any proportion.
A crosslinking agent: the crosslinking curing agent is a compound of tert-butyl peroxy-2-ethylhexyl carbonate and ethyl 3, 3-di (tert-butylperoxy) butyrate; the auxiliary crosslinking agent is prepared by mixing triallyl isocyanurate, triallyl cyanurate and trimethylolpropane trimethacrylate according to any proportion.
Silane coupling agent: vinyl tri (beta-methoxyethoxy) silane and vinyl triacetoxysilane are compounded according to the molar ratio of 1:1.
Light stabilizer: bis (2,2,6, 6-tetramethylpiperidinyl) sebacate.
Inorganic polarization-resistant material: the modified nano potassium aluminum silicate and the fumed silica are mixed according to the weight ratio of 1:1.
Organic polarization-resistant material: the synthesized ethoxylated amine is mixed with glyceride according to the weight ratio of 2: 1.
The formula is that EVA resin, antioxidant, crosslinking agent, silane coupling agent, light stabilizer, inorganic anti-polarization material and organic anti-polarization material are mixed uniformly according to the weight ratio of 89:0.2:2.5:0.5:0.1:2: 5.7.
And the second step of formula design of the transparent high-cut-off fast-curing EVA layer:
main materials: the low ethylene-vinyl acetate copolymer (EVA) has a VA content of 33 percent, and the low melting point means that the melt flow rate of the ethylene-vinyl acetate copolymer resin is 0.3g/10 min-15 g/10 min.
Antioxidant: the main antioxidant is beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid octadecyl ester, and the auxiliary antioxidant is tris (4-nonylphenol) phosphite and tris (2, 4-di-tert-butylphenyl) phosphite which are compounded according to the weight ratio of 1:1.
Light stabilizer: bis (2,2,6, 6-tetramethylpiperidinyl) sebacate.
Ultraviolet light absorber: 2-hydroxy-4-n-octoxy benzophenone.
A crosslinking agent: the crosslinking curing agent is prepared by compounding 2-ethylhexyl tert-butyl carbonate peroxide and tert-butyl isobutyrate peroxide according to the weight ratio of 1: 2; the auxiliary crosslinking agent is compounded by triallyl isocyanurate, 2 mol of caprolactone modified dipentaerythritol hexaacrylate and propoxylated pentaerythritol tetraacrylate according to the weight ratio of 1:1: 1.
Silane coupling agent: vinyl trimethoxy silane.
The materials are fully and uniformly mixed according to the proportion of EVA, antioxidant, light stabilizer, ultraviolet absorbent, crosslinking agent and silane coupling agent =96:0.3:0.2:0.2:3: 0.3.
And respectively pouring the two mixed materials into two casting extruders for melt co-extrusion, setting the temperature of each area of the extruders and a die head to be 65-100 ℃, simultaneously extruding the two materials from the same double-layer co-extrusion die head, and carrying out embossing compounding to prepare the high-efficiency low-cost PID (proportion integration differentiation) resistant packaging adhesive film for the double-sided PREC battery.
The production process flow of the patent is as follows: mixing materials, casting and co-extruding, embossing, cooling, cutting, rolling and packaging.
And finally packaging and warehousing. And then testing the volume resistivity, light transmittance, crosslinking degree and the like of the adhesive film and testing the PID resistance of the double-sided battery packaging assembly.
Example 2
The first step of the formula design of the transparent anti-polarization EVA layer is as follows:
main materials: the ethylene-vinyl acetate copolymer (EVA) is prepared by mixing EVA resin with 14% of VA content and EVA resin with 26% of VA content according to the weight ratio of 1: 2.
Antioxidant: the main antioxidant is beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid octadecyl ester, and the auxiliary antioxidant is tris (4-nonylphenol) phosphite and tris (2, 4-di-tert-butylphenyl) phosphite which are mixed according to any proportion.
A crosslinking agent: the crosslinking curing agent is a compound of tert-amyl peroxy-2-ethylhexyl carbonate and ethyl 3, 3-di (tert-butylperoxy) butyrate; the auxiliary crosslinking agent is prepared by mixing pentaerythritol propoxide tetraacrylate, triallyl cyanurate and trimethylolpropane trimethacrylate according to any proportion.
The silane coupling agent is compounded by vinyl tri (beta-methoxyethoxy) silane and vinyl triacetoxysilane according to the molar ratio of 1:1.
Light stabilizer: 3,5 di-tert-butyl-4-hydroxy-benzoic acid hexadecyl ester and 2-hydroxy-4-n-octoxybenzophenone are compounded according to the weight ratio of 3: 1.
Inorganic polarization-resistant material: the nano modified aluminum borosilicate and the aluminum silicate are mixed according to the weight ratio of 1: 2.
Organic polarization-resistant material: glycerol (12-hydroxy) monostearate.
The formula comprises the following mixed EVA resin: the antioxidant, the crosslinking agent, the silane coupling agent, the light stabilizer, the inorganic anti-polarization material and the organic anti-polarization material are uniformly mixed according to the weight ratio of 95:0.05:2:0.1:0.05:1.5: 1.3.
And the second step of formula design of the transparent high-cut-off fast-curing EVA layer:
main materials: the low ethylene-vinyl acetate copolymer (EVA) is prepared by mixing resin with 18% of VA content and resin with 40% of VA content according to the weight ratio of 1:3, wherein the low melting means that the melt flow rate of the ethylene-vinyl acetate copolymer resin is 0.3g/10 min-15 g/10 min.
Antioxidant: the main antioxidant is beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid octadecyl ester, and the auxiliary antioxidant is tris (4-nonylphenol) phosphite and tris (2, 4-di-tert-butylphenyl) phosphite which are compounded according to the weight ratio of 1:1.
Light stabilizer: bis (2,2,6, 6-tetramethylpiperidinyl) sebacate.
Ultraviolet light absorber: 2-hydroxy-4-n-octoxy benzophenone.
A crosslinking agent: the crosslinking curing agent is prepared by compounding 2-ethylhexyl tert-butyl carbonate peroxide and tert-butyl isobutyrate peroxide according to the weight ratio of 1: 2; the auxiliary crosslinking agent is compounded by triallyl isocyanurate, 2 mol of lactone modified dipentaerythritol hexaacrylate and propoxylated pentaerythritol tetraacrylate according to the weight ratio of 1:1: 1.
Silane coupling agent: vinyltriethoxysilane.
The formula is as follows: antioxidant, light stabilizer, ultraviolet absorber, crosslinking agent and silane coupling agent =96:0.2:0.2:0.2:3.2:0.2, and the materials are fully and uniformly mixed according to the proportion.
And respectively pouring the two mixed materials into two casting extruders for melt co-extrusion, setting the temperature of each area of the extruders and a die head to be 65-100 ℃, simultaneously extruding the two materials from the same double-layer co-extrusion die head, and carrying out embossing compounding to prepare the high-efficiency low-cost PID (proportion integration differentiation) resistant packaging adhesive film for the double-sided PREC battery.
The production process flow of the patent is as follows: mixing materials, casting and co-extruding, embossing, cooling, cutting, rolling and packaging.
And finally packaging and warehousing. And then testing the volume resistivity, light transmittance, crosslinking degree and the like of the adhesive film and testing the PID resistance of the double-sided battery packaging assembly.
Example 3
The first step of the formula design of the transparent anti-polarization EVA layer is as follows:
main materials: ethylene-vinyl acetate copolymer (EVA), the VA content of the EVA resin is 26%.
Antioxidant: the main antioxidant is beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid octadecyl ester, and the auxiliary antioxidant is tris (4-nonylphenol) phosphite and tris (2, 4-di-tert-butylphenyl) phosphite which are mixed according to any proportion.
A crosslinking agent: the crosslinking curing agent is a compound of tert-amyl peroxy-2-ethylhexyl carbonate and ethyl 3, 3-di (tert-butylperoxy) butyrate; the auxiliary crosslinking agent is prepared by mixing pentaerythritol propoxide tetraacrylate, triallyl cyanurate and trimethylolpropane trimethacrylate according to any proportion.
Silane coupling agent: vinyl tri (beta-methoxyethoxy) silane and vinyl triacetoxysilane are compounded according to the molar ratio of 1:1.
Light stabilizer: 3,5 di-tert-butyl-4-hydroxy-benzoic acid hexadecyl ester and 2-hydroxy-4-n-octoxybenzophenone are compounded according to the weight ratio of 3: 1.
Inorganic polarization-resistant material: fumed silica.
Organic polarization-resistant material: sodium tetracosanylbenzene sulfonate was mixed with glycerin (12-hydroxy) monostearate at a weight ratio of 2: 1.
The formula comprises the following components of EVA resin, antioxidant, crosslinking agent, silane coupling agent, light stabilizer, inorganic anti-polarization material: the organic anti-polarization material is uniformly mixed according to the weight ratio of 91:0.4:2:0.4:0.2:2: 4.
And the second step of formula design of the transparent high-cut-off fast-curing EVA layer:
main materials: the low ethylene-vinyl acetate copolymer (EVA) is prepared by mixing resin with 14% of VA and resin with 55% of VA according to the weight ratio of 1:3, and the low melting means that the melt flow rate of the ethylene-vinyl acetate copolymer resin is 0.3g/10 min-15 g/10 min.
Antioxidant: the main antioxidant is beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid octadecyl ester, and the auxiliary antioxidant is tris (4-nonylphenol) phosphite and tris (2, 4-di-tert-butylphenyl) phosphite which are compounded according to the weight ratio of 1:1.
Light stabilizer: bis (2,2,6, 6-tetramethylpiperidinyl) sebacate.
Ultraviolet light absorber: 2-hydroxy-4-n-octoxy benzophenone.
A crosslinking agent: the crosslinking curing agent is prepared by compounding 2-ethylhexyl tert-butyl carbonate peroxide and tert-butyl isobutyrate peroxide according to the weight ratio of 1: 2; the auxiliary crosslinking agent is compounded by triallyl isocyanurate, 2 mol of lactone modified dipentaerythritol hexaacrylate and propoxylated pentaerythritol tetraacrylate according to the weight ratio of 1:1: 1.
Silane coupling agent: vinyltriethoxysilane.
The formula is as follows: the antioxidant, the light stabilizer, the ultraviolet absorber, the crosslinking agent and the silane coupling agent are fully mixed according to the proportion of 98:0.02:0.1:0.1:1.58: 0.2.
And respectively pouring the two mixed materials into two casting extruders for melt co-extrusion, setting the temperature of each area of the extruders and a die head to be 65-100 ℃, simultaneously extruding the two materials from the same double-layer co-extrusion die head, and carrying out embossing compounding to prepare the high-efficiency low-cost PID (proportion integration differentiation) resistant packaging adhesive film for the double-sided PREC battery.
The production process flow of the patent is as follows: mixing materials, casting and co-extruding, embossing, cooling, cutting, rolling and packaging.
And finally packaging and warehousing. And then testing the volume resistivity, light transmittance, crosslinking degree and the like of the adhesive film and testing the PID resistance of the double-sided battery packaging assembly.
Comparative example 1
The first step of the formula design of the transparent anti-polarization EVA layer is as follows:
main materials: ethylene-vinyl acetate copolymer (EVA), EVA resin with 26% of VA content.
Antioxidant: the main antioxidant is beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid octadecyl ester, and the auxiliary antioxidant is tris (4-nonylphenol) phosphite and tris (2, 4-di-tert-butylphenyl) phosphite which are mixed according to any proportion.
A crosslinking agent: the crosslinking curing agent is a compound of tert-butyl peroxy-2-ethylhexyl carbonate and ethyl 3, 3-di (tert-butylperoxy) butyrate; the auxiliary crosslinking agent is prepared by mixing triallyl isocyanurate, triallyl cyanurate and trimethylolpropane trimethacrylate according to any proportion.
Silane coupling agent: vinyl tri (beta-methoxyethoxy) silane and vinyl triacetoxysilane are compounded according to the molar ratio of 1:1.
Light stabilizer: bis (2,2,6, 6-tetramethylpiperidinyl) sebacate.
Inorganic polarization-resistant material: the modified nano potassium aluminum silicate and the fumed silica are mixed according to the weight ratio of 1:1.
The formula is that EVA resin, antioxidant, crosslinking agent, silane coupling agent, light stabilizer and inorganic anti-polarization material are mixed uniformly according to the weight ratio of 89:0.2:2.5:0.5:0.1: 7.7.
And a second step of designing a formula of the transparent high-cut-off EVA layer:
main materials: the content of VA in the low ethylene-vinyl acetate copolymer (EVA) is 28 percent, and the low melting point means that the melt flow rate of the ethylene-vinyl acetate copolymer resin is 0.3g/10 min-15 g/10 min.
Antioxidant: the main antioxidant is beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid octadecyl ester, and the auxiliary antioxidant is tris (4-nonylphenol) phosphite and tris (2, 4-di-tert-butylphenyl) phosphite which are compounded according to the weight ratio of 1:1.
Light stabilizer: bis (2,2,6, 6-tetramethylpiperidinyl) sebacate.
Ultraviolet light absorber: 2-hydroxy-4-n-octoxy benzophenone.
A crosslinking agent: tert-butyl peroxyisobutyrate; the auxiliary crosslinking agent is compounded by triallyl isocyanurate and propoxylated pentaerythritol tetraacrylate according to the weight ratio of 1:1.
Silane coupling agent: vinyl trimethoxy silane.
The materials are fully and uniformly mixed according to the proportion of EVA, antioxidant, light stabilizer, ultraviolet absorbent, crosslinking agent and silane coupling agent =97:0.3:0.2:0.2:2: 0.3.
And respectively pouring the two mixed materials into two casting extruders for melt co-extrusion, setting the temperature of each area of the extruders and a die head to be 65-100 ℃, simultaneously extruding the two materials from the same double-layer co-extrusion die head, and carrying out embossing compounding to prepare the high-efficiency low-cost PID (proportion integration differentiation) resistant packaging adhesive film for the double-sided PREC battery.
The production process flow of the patent is as follows: mixing materials, casting and co-extruding, embossing, cooling, cutting, rolling and packaging.
And finally packaging and warehousing. And then testing the volume resistivity, light transmittance, crosslinking degree and the like of the adhesive film and testing the PID resistance of the double-sided battery packaging assembly.
Comparative example 2
The first step of the formula design of the transparent anti-polarization EVA layer is as follows:
main materials: the ethylene-vinyl acetate copolymer (EVA) is prepared by mixing EVA resin with 14% of VA content and EVA resin with 26% of VA content according to the weight ratio of 1: 2.
Antioxidant: the main antioxidant is beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid octadecyl ester, and the auxiliary antioxidant is tris (4-nonylphenol) phosphite and tris (2, 4-di-tert-butylphenyl) phosphite which are mixed according to any proportion.
A crosslinking agent: the crosslinking curing agent is a compound of tert-amyl peroxy-2-ethylhexyl carbonate and ethyl 3, 3-di (tert-butylperoxy) butyrate; the auxiliary crosslinking agent is prepared by mixing pentaerythritol propoxide tetraacrylate, triallyl cyanurate and trimethylolpropane trimethacrylate according to any proportion.
The silane coupling agent is compounded by vinyl tri (beta-methoxyethoxy) silane and vinyl triacetoxysilane according to the molar ratio of 1:1.
Light stabilizer: 3,5 di-tert-butyl-4-hydroxy-benzoic acid hexadecyl ester and 2-hydroxy-4-n-octoxybenzophenone are compounded according to the weight ratio of 3: 1.
Organic polarization-resistant material: glycerol (12-hydroxy) monostearate.
The formula comprises the following mixed EVA resin: the antioxidant, the crosslinking agent, the silane coupling agent, the light stabilizer and the organic anti-polarization material are uniformly mixed according to the weight ratio of 95:0.05:2:0.1:0.05: 2.8.
And a second step of designing a formula of the transparent high-cut-off EVA layer:
main materials: the low ethylene-vinyl acetate copolymer (EVA) is prepared by mixing resin with 26% of VA content and resin with 28% of VA content according to the weight ratio of 1:1, wherein the low melting means that the melt flow rate of the ethylene-vinyl acetate copolymer resin is 0.3g/10 min-15 g/10 min.
Antioxidant: the main antioxidant is beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid octadecyl ester, and the auxiliary antioxidant is tris (4-nonylphenol) phosphite and tris (2, 4-di-tert-butylphenyl) phosphite which are compounded according to the weight ratio of 1:1.
Light stabilizer: bis (2,2,6, 6-tetramethylpiperidinyl) sebacate.
Ultraviolet light absorber: 2-hydroxy-4-n-octoxy benzophenone.
A crosslinking agent: the crosslinking curing agent is prepared by compounding 2-ethylhexyl tert-butyl carbonate peroxide and tert-butyl isobutyrate peroxide according to the weight ratio of 1: 2; the auxiliary crosslinking agent is compounded by triallyl isocyanurate, 2 mol of lactone modified dipentaerythritol hexaacrylate and propoxylated pentaerythritol tetraacrylate according to the weight ratio of 1:1: 1.
Silane coupling agent: vinyltriethoxysilane.
The formula is as follows: antioxidant, light stabilizer, ultraviolet absorber, crosslinking agent and silane coupling agent =96:0.2:0.2:0.2:3.2:0.2, and the materials are fully and uniformly mixed according to the proportion.
And respectively pouring the two mixed materials into two casting extruders for melt co-extrusion, setting the temperature of each area of the extruders and a die head to be 65-100 ℃, simultaneously extruding the two materials from the same double-layer co-extrusion die head, and carrying out embossing compounding to prepare the high-efficiency low-cost PID (proportion integration differentiation) resistant packaging adhesive film for the double-sided PREC battery.
The production process flow of the patent is as follows: mixing materials, casting and co-extruding, embossing, cooling, cutting, rolling and packaging.
And finally packaging and warehousing. And then testing the volume resistivity, light transmittance, crosslinking degree and the like of the adhesive film and testing the PID resistance of the double-sided battery packaging assembly.
According to the embodiment, the low-cost high-efficiency PID (proportion integration differentiation) resistant packaging adhesive film for the double-sided battery can shorten the laminating time of the assembly, can shorten the laminating time by 2min under the same laminating temperature condition, and greatly improves the production efficiency of the assembly end. Meanwhile, the double-sided battery single-package assembly prepared by the packaging adhesive film is used for PID test of 192h attenuation, the front power attenuation of the double-sided PERC battery matched with the white back plate is within 3.0%, and the back power attenuation of the double-sided PERC battery matched with the transparent back plate is within 5.0%, so that the requirements of IEC standard are met.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (10)
1. The utility model provides a two-sided PREC battery is with anti PID encapsulation glued membrane which characterized in that: the packaging adhesive film comprises an upper anti-polarization transparent EVA layer and a lower rapid curing high-cut-off transparent EVA layer.
2. The anti-PID packaging adhesive film for double-sided PREC battery according to claim 1, characterized in that: the upper-layer anti-polarization transparent EVA is a casting composite layer, the thickness of the upper-layer anti-polarization transparent EVA is 150-300 mu m, the thickness of the lower-layer fast-curing high-cut-off transparent EVA layer is 200-700 mu m, and the total thickness of the packaging adhesive film is 350-800 mu m.
3. The anti-PID packaging adhesive film for double-sided PREC battery according to claim 1, characterized in that: the polarization-resistant transparent EVA layer comprises the following components in percentage by mass: 89-95% of ethylene-vinyl acetate copolymer resin, 0.05-0.4% of antioxidant, 0.05-0.2% of light stabilizer, 2-2.5% of cross-linking agent, 0.1-0.5% of silane coupling agent, 1.5-2% of inorganic anti-polarization material and 1.3-5.7% of organic anti-polarization material.
4. The anti-PID packaging adhesive film for the double-sided PREC battery according to claim 3, wherein: the ethylene-vinyl acetate copolymer resin contains 14 to 26 percent of vinyl acetate, the melt flow rate of the ethylene-vinyl acetate copolymer resin is 2.5 to 40g/10min, and the volume resistivity is more than or equal to 1 to 1014The melting temperature is 70-100 ℃.
5. The anti-PID packaging adhesive film for the double-sided PREC battery according to claim 3, wherein: the inorganic anti-polarization material adopts nano potassium aluminum silicate, gas phase silicon dioxide or Na with the surface subjected to organic silicon coating treatment+、K+、Mg2+、Ba2+、Al3+、Zn3+One or more of silicate and borosilicate according to any proportion.
6. The anti-PID packaging adhesive film for the double-sided PREC battery according to claim 3, wherein: the organic anti-polarization material comprises one or more of phosphoric acid monoester ether, stearate, N-bis (2-hydroxyethyl) alkylamine, N- (3-dodecyloxy-2-hydroxypropyl) ethanolamine, a synthetic mixture of ethoxylated amine and glyceride, hydroxyl-containing acrylic acid micromolecule prepolymer, glycerol (12-hydroxyl) monostearate, (3-lauramidopropyl) trimethyl methyl sulfate amine, polyether micromolecule prepolymer with a C-O-C repeating structure and five-membered and six-membered cyclic polymers with long alkyl chains, wherein the five-membered and six-membered cyclic polymers are mixed according to any proportion.
7. The anti-PID packaging adhesive film for double-sided PREC battery according to claim 1, characterized in that: the rapid curing high-cut-off transparent EVA layer comprises the following components in percentage by mass: the low melting point means that the content of the ethylene-vinyl acetate copolymer resin is 96 to 98 percent, the content of the antioxidant is 0.01 to 3 percent, the content of the cross-linking agent is 1.58 to 3.2 percent, the content of the silane coupling agent is 0.2 to 0.3 percent, the content of the light stabilizer is 0.02 to 0.3 percent, and the content of the ultraviolet cut-off agent is 0.1 to 0.2 percent.
8. The anti-PID packaging adhesive film for double-sided PREC battery according to claim 7, characterized in that: the low melting point means that the molar content of vinyl acetate in the ethylene-vinyl acetate copolymer resin is 18-55%, and the melt flow rate of the low melting point means that the ethylene-vinyl acetate copolymer resin is 0.3g/10 min-15 g/10 min.
9. The PID-resistant adhesive film for double-sided PREC batteries according to any one of claims 3 or 7, wherein: the silane coupling agent is at least one of vinyl triethoxysilane, vinyl trimethoxysilane, vinyl tri-tert-butyl peroxide silane, gamma-mercaptopropyl trimethoxysilane, vinyl tri (beta-methoxyethoxy) silane and gamma-mercaptopropyl triethoxysilane.
10. A preparation method of a PID (potential induced degradation) resistant packaging adhesive film for a double-sided PREC battery is characterized by comprising the following steps of: the preparation method comprises the following steps:
1) adding ethylene-vinyl acetate copolymer (with the VA content of 14-26%), antioxidant, light stabilizer, organic and inorganic anti-polarization auxiliary agent, crosslinking agent and silane coupling agent into a high-speed mixer in proportion, fully mixing for 45-75 min, and pouring into an extruder for later use;
2) then adding the low-melting ethylene-vinyl acetate copolymer resin (with the VA content of 26-55%), the antioxidant, the crosslinking agent, the silane coupling agent, the light stabilizer and the ultraviolet cut-off agent into a high-speed mixer in proportion, fully mixing for 45-75 min, and pouring into another extruder for later use;
3) and simultaneously starting two single-screw extruders, extruding at 65-100 ℃, simultaneously extruding and embossing two materials from the same double-layer co-extrusion die head, and compounding to prepare the high-efficiency low-cost PID (potential induced degradation) resistant packaging adhesive film for the double-sided PREC battery.
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| CN114106738A (en) * | 2021-12-14 | 2022-03-01 | 常州斯威克光伏新材料有限公司 | Heterojunction battery glue film |
| CN114369426A (en) * | 2022-01-04 | 2022-04-19 | 江苏斯尔邦石化有限公司 | Hot melt adhesive film composition and preparation method and application thereof |
| EP4235813A1 (en) * | 2022-02-25 | 2023-08-30 | Ja Solar Technology Yangzhou Co., Ltd. | Solar cell module and manufacturing method thereof |
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| CN114106738B (en) * | 2021-12-14 | 2023-02-21 | 常州斯威克光伏新材料有限公司 | Heterojunction battery glue film |
| CN114369426A (en) * | 2022-01-04 | 2022-04-19 | 江苏斯尔邦石化有限公司 | Hot melt adhesive film composition and preparation method and application thereof |
| EP4235813A1 (en) * | 2022-02-25 | 2023-08-30 | Ja Solar Technology Yangzhou Co., Ltd. | Solar cell module and manufacturing method thereof |
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