CN114507483A - Flame-retardant insulating glue film for side plate of power battery cell module and preparation method thereof - Google Patents
Flame-retardant insulating glue film for side plate of power battery cell module and preparation method thereof Download PDFInfo
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- CN114507483A CN114507483A CN202210279788.9A CN202210279788A CN114507483A CN 114507483 A CN114507483 A CN 114507483A CN 202210279788 A CN202210279788 A CN 202210279788A CN 114507483 A CN114507483 A CN 114507483A
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- epoxy resin
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- retardant
- adhesive film
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- 239000003063 flame retardant Substances 0.000 title claims abstract description 92
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 title claims abstract description 77
- 238000002360 preparation method Methods 0.000 title claims abstract description 52
- 239000003292 glue Substances 0.000 title claims description 31
- 239000003822 epoxy resin Substances 0.000 claims abstract description 111
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 111
- 239000002313 adhesive film Substances 0.000 claims abstract description 78
- 239000002131 composite material Substances 0.000 claims abstract description 39
- 239000012528 membrane Substances 0.000 claims abstract description 34
- 239000004114 Ammonium polyphosphate Substances 0.000 claims abstract description 27
- 235000019826 ammonium polyphosphate Nutrition 0.000 claims abstract description 27
- 229920001276 ammonium polyphosphate Polymers 0.000 claims abstract description 27
- CJZGTCYPCWQAJB-UHFFFAOYSA-L calcium stearate Chemical compound [Ca+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CJZGTCYPCWQAJB-UHFFFAOYSA-L 0.000 claims abstract description 21
- 235000013539 calcium stearate Nutrition 0.000 claims abstract description 21
- 239000008116 calcium stearate Substances 0.000 claims abstract description 21
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 19
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 13
- 239000002994 raw material Substances 0.000 claims abstract description 13
- 230000001681 protective effect Effects 0.000 claims abstract description 11
- 239000000843 powder Substances 0.000 claims description 54
- 239000003463 adsorbent Substances 0.000 claims description 26
- 229920001971 elastomer Polymers 0.000 claims description 23
- 239000000945 filler Substances 0.000 claims description 22
- 238000010438 heat treatment Methods 0.000 claims description 22
- 229920001973 fluoroelastomer Polymers 0.000 claims description 20
- 239000000243 solution Substances 0.000 claims description 20
- 239000000725 suspension Substances 0.000 claims description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 19
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 14
- 125000005442 diisocyanate group Chemical group 0.000 claims description 14
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 13
- 229920002799 BoPET Polymers 0.000 claims description 10
- 125000003700 epoxy group Chemical group 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 10
- 235000021355 Stearic acid Nutrition 0.000 claims description 9
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 9
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims description 9
- 239000008117 stearic acid Substances 0.000 claims description 9
- 229920000139 polyethylene terephthalate Polymers 0.000 claims description 8
- 239000000440 bentonite Substances 0.000 claims description 7
- 229910000278 bentonite Inorganic materials 0.000 claims description 7
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical group O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 7
- 150000004683 dihydrates Chemical class 0.000 claims description 7
- 239000010440 gypsum Substances 0.000 claims description 7
- 229910052602 gypsum Inorganic materials 0.000 claims description 7
- 238000003756 stirring Methods 0.000 claims description 7
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 claims description 6
- 229910021536 Zeolite Inorganic materials 0.000 claims description 6
- 239000007864 aqueous solution Substances 0.000 claims description 6
- 239000012298 atmosphere Substances 0.000 claims description 6
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims description 6
- 229910000077 silane Inorganic materials 0.000 claims description 6
- 239000010457 zeolite Substances 0.000 claims description 6
- 239000010426 asphalt Substances 0.000 claims description 5
- 230000005611 electricity Effects 0.000 claims description 5
- 235000019441 ethanol Nutrition 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 5
- 239000011248 coating agent Substances 0.000 claims description 4
- 238000000576 coating method Methods 0.000 claims description 4
- 238000001704 evaporation Methods 0.000 claims description 4
- 238000009472 formulation Methods 0.000 claims description 4
- 238000010030 laminating Methods 0.000 claims description 4
- 230000001590 oxidative effect Effects 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 11
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 abstract description 7
- 239000004132 Calcium polyphosphate Substances 0.000 abstract description 5
- 235000019827 calcium polyphosphate Nutrition 0.000 abstract description 5
- 238000000926 separation method Methods 0.000 abstract description 5
- 150000001875 compounds Chemical class 0.000 abstract description 4
- 229910021529 ammonia Inorganic materials 0.000 abstract description 3
- 238000010790 dilution Methods 0.000 abstract description 3
- 239000012895 dilution Substances 0.000 abstract description 3
- 229910052782 aluminium Inorganic materials 0.000 description 21
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 21
- 230000000052 comparative effect Effects 0.000 description 21
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 10
- 239000001301 oxygen Substances 0.000 description 10
- 229910052760 oxygen Inorganic materials 0.000 description 10
- 230000001070 adhesive effect Effects 0.000 description 6
- 239000013078 crystal Substances 0.000 description 5
- 238000000354 decomposition reaction Methods 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
- 239000000853 adhesive Substances 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 230000003647 oxidation Effects 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 4
- 229920000137 polyphosphoric acid Polymers 0.000 description 4
- VILCJCGEZXAXTO-UHFFFAOYSA-N 2,2,2-tetramine Chemical group NCCNCCNCCN VILCJCGEZXAXTO-UHFFFAOYSA-N 0.000 description 3
- AHDSRXYHVZECER-UHFFFAOYSA-N 2,4,6-tris[(dimethylamino)methyl]phenol Chemical group CN(C)CC1=CC(CN(C)C)=C(O)C(CN(C)C)=C1 AHDSRXYHVZECER-UHFFFAOYSA-N 0.000 description 3
- UPMLOUAZCHDJJD-UHFFFAOYSA-N 4,4'-Diphenylmethane Diisocyanate Chemical compound C1=CC(N=C=O)=CC=C1CC1=CC=C(N=C=O)C=C1 UPMLOUAZCHDJJD-UHFFFAOYSA-N 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 229960001124 trientine Drugs 0.000 description 3
- 239000005995 Aluminium silicate Substances 0.000 description 2
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 2
- 235000012211 aluminium silicate Nutrition 0.000 description 2
- PASHVRUKOFIRIK-UHFFFAOYSA-L calcium sulfate dihydrate Chemical compound O.O.[Ca+2].[O-]S([O-])(=O)=O PASHVRUKOFIRIK-UHFFFAOYSA-L 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000004132 cross linking Methods 0.000 description 2
- 239000013530 defoamer Substances 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000007731 hot pressing Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical group O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000007847 structural defect Effects 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- 241000220317 Rosa Species 0.000 description 1
- 239000002518 antifoaming agent Substances 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 238000007142 ring opening reaction Methods 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- CPUDPFPXCZDNGI-UHFFFAOYSA-N triethoxy(methyl)silane Chemical group CCO[Si](C)(OCC)OCC CPUDPFPXCZDNGI-UHFFFAOYSA-N 0.000 description 1
- BPSIOYPQMFLKFR-UHFFFAOYSA-N trimethoxy-[3-(oxiran-2-ylmethoxy)propyl]silane Chemical compound CO[Si](OC)(OC)CCCOCC1CO1 BPSIOYPQMFLKFR-UHFFFAOYSA-N 0.000 description 1
- 238000001291 vacuum drying Methods 0.000 description 1
Classifications
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- 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
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
- C09J7/22—Plastics; Metallised plastics
- C09J7/25—Plastics; Metallised plastics based on macromolecular compounds obtained otherwise than by reactions involving only carbon-to-carbon unsaturated bonds
- C09J7/255—Polyesters
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
- C08G59/40—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the curing agents used
- C08G59/50—Amines
- C08G59/5006—Amines aliphatic
-
- 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
- C09J163/00—Adhesives based on epoxy resins; Adhesives based on derivatives of epoxy resins
-
- 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
-
- 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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/32—Phosphorus-containing compounds
- C08K2003/321—Phosphates
- C08K2003/322—Ammonium phosphate
- C08K2003/323—Ammonium polyphosphate
-
- 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
- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/10—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet
- C09J2301/12—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the arrangement of layers
- C09J2301/122—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the arrangement of layers the adhesive layer being present only on one side of the carrier, e.g. single-sided adhesive tape
-
- 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
- C09J2423/041—Presence of homo or copolymers of ethene in the barrier layer
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- 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
- C09J2467/00—Presence of polyester
- C09J2467/006—Presence of polyester in the substrate
-
- 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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Inorganic Chemistry (AREA)
- Adhesives Or Adhesive Processes (AREA)
Abstract
The application relates to the technical field of adhesive film processing, and particularly discloses a flame-retardant insulating adhesive film for a side plate of a power battery cell module and a preparation method of the flame-retardant insulating adhesive film. The flame-retardant insulating adhesive film comprises a PET adhesive film, an epoxy resin film and a PE protective film, wherein the epoxy resin film comprises the following raw materials in parts by weight: 100-120 parts of epoxy resin, 16-24 parts of composite flame retardant, 15-25 parts of curing agent, 1.4-1.8 parts of accelerator and 6-10 parts of auxiliary agent, wherein the components of the composite flame retardant comprise ammonium polyphosphate and calcium stearate. This application chooses for use to contain ammonium polyphosphate and calcium stearate's compound fire retardant performance fire-retardant effect, and ammonium polyphosphate decomposes on the one hand and produces ammonia dilution and separation air to make the organic component in the glued membrane form the carbomorphism membrane, the calcium polyphosphate that compound fire retardant generated under high temperature fills the carbomorphism membrane, and the carbomorphism membrane carries out the separation to the air, has realized fire-retardant effect.
Description
Technical Field
The application relates to the technical field of adhesive film processing, in particular to a flame-retardant insulating adhesive film for a side plate of a power battery cell module and a preparation method thereof.
Background
The power battery refers to a power source for providing power for a tool, and storage batteries mounted on vehicles such as electric automobiles, electric trains, electric bicycles and the like are all power batteries. At present, power battery manufacture factory often needs to bond the resin glued membrane on the aluminum plate surface of electric core module curb plate when processing power battery's electric core module, and in order to improve the security performance of power battery during operation, bonds and need possess good flame retardant efficiency at the glued membrane on aluminum plate surface.
Among the related art, there is an insulating glued membrane of power battery electricity core module curb plate, and insulating glued membrane includes PET glued membrane, epoxy resin membrane and the PE protection film of laminating in proper order along thickness direction, and epoxy resin membrane's formula includes the raw materials of following parts by weight: 100-120 parts of epoxy resin, 16-24 parts of insulating filler, 15-25 parts of curing agent, 1.4-1.8 parts of accelerator and 6-10 parts of assistant. Wherein, the curing agent is triethylene tetramine, the accelerator is 2,4, 6-tri (dimethylamino methyl) phenol, the auxiliary agent is flatting agent EFKA3777 and defoamer PL-200 which are mixed according to the weight ratio of 1:1, and the insulating filler is kaolin. When processing power battery's electric core module, the operator makes epoxy resin film bond on the aluminum plate surface of battery module curb plate through heat treatment, waits that epoxy resin film can realize the combination of glued membrane and aluminum plate after solidifying completely. When the power battery has electric leakage, the insulating adhesive film blocks the current conduction path, thereby reducing the damage to the power battery.
In view of the above-mentioned related art, the inventors believe that although an insulating adhesive film is obtained by adding an insulating filler to an epoxy resin film in the related art, heat generation is likely to occur after a power battery is subjected to long-term overload operation, and the flame retardant effect of the insulating filler is limited. When the power battery burns due to the fact that heat cannot be dissipated timely, the insulating adhesive film is easy to ignite, and the damaged area of the power battery is enlarged.
Disclosure of Invention
In the related art, when the power battery burns due to the fact that heat cannot be dissipated timely, the insulating adhesive film is easy to ignite, and the damaged area of the power battery is increased. In order to overcome the defect, the application provides a flame-retardant insulating adhesive film for a side plate of a power battery cell module and a preparation method thereof.
The utility model provides a fire-retardant insulating glued membrane for power battery electricity core module curb plate, adopts following technical scheme:
the utility model provides a fire-retardant insulating glued membrane for power battery electricity core module curb plate, fire-retardant insulating glued membrane includes PET glued membrane, epoxy resin film and the PE protection film of laminating in proper order along thickness direction, epoxy resin film's formula includes the raw materials of following parts by weight: 100-120 parts of epoxy resin, 16-24 parts of composite flame retardant, 15-25 parts of curing agent, 1.4-1.8 parts of accelerator and 6-10 parts of auxiliary agent, wherein the components of the composite flame retardant comprise ammonium polyphosphate and calcium stearate.
Through adopting above-mentioned technical scheme, this application plays fire-retardant effect through the compound fire retardant who contains ammonium polyphosphate and calcium stearate. When the glued membrane of this application receives the flame ignition, the ammonia that ammonium polyphosphate decomposed production carries out separation and dilution to the air around the flame, makes near the oxygen concentration decline of glued membrane, and the polyphosphoric acid that ammonium polyphosphate decomposed production simultaneously promotes the organic component in the glued membrane and carries out the carbomorphism, forms compact carbomorphism membrane after the organic matter carbomorphism, and the carbomorphism membrane can keep apart the air, hinders the burning of glued membrane. When the carbonized film is formed, the decomposition product of the calcium stearate reacts with polyphosphoric acid in the decomposition product of the ammonium polyphosphate to form calcium polyphosphate particles, and the calcium polyphosphate particles can be filled into gaps of the carbonized film, so that the density of the carbonized film is increased, the air isolation effect of the carbonized film is improved, and the flame retardant property of the adhesive film is improved.
In addition, although the epoxy resin film component does not include a component capable of directly improving the insulating property, the calcium stearate also has good water blocking property, and when the battery works normally, the calcium stearate can reduce the possibility that moisture in the air permeates into the epoxy resin film, so that the moisture content of the epoxy resin film is reduced, and the resistance of the epoxy resin film is increased after the moisture content of the epoxy resin film is reduced, so that the insulating property of the adhesive film is indirectly improved.
Preferably, the formula of the epoxy resin film comprises the following raw materials in parts by weight: 115 parts of epoxy resin 105, 18-22 parts of composite flame retardant, 17-23 parts of curing agent, 1.5-1.7 parts of accelerator and 7-9 parts of auxiliary agent.
By adopting the technical scheme, the raw material ratio of the epoxy resin film is optimized, and the flame retardant property of the flame-retardant insulating adhesive film for the side plate of the power battery cell module is improved.
Preferably, the composite flame retardant is prepared by the following method:
(1) preparing ammonium polyphosphate into an aqueous solution, uniformly mixing the aqueous solution of ammonium polyphosphate with an inorganic adsorbent to obtain a suspension, and standing the suspension;
(2) adding a silane coupling agent into the suspension, and then heating the suspension in a water bath to obtain a silane modified suspension;
(3) removing water in the silane modified suspension, then putting the residual solid matter, stearic acid and calcium stearate into absolute ethyl alcohol, stirring uniformly, and evaporating to remove the ethyl alcohol to obtain the composite flame retardant.
By adopting the technical scheme, the inorganic adsorbent is used as a carrier, the inorganic adsorbent is firstly used for adsorbing the ammonium polyphosphate in water, then the silane coupling agent is used for carrying out surface modification on the inorganic adsorbent adsorbing the ammonium polyphosphate, the surface of the inorganic adsorbent is grafted with the organic chain segment, and then the anhydrous ethanol is used as a medium to coat the surface of the inorganic adsorbent with a mixture of stearic acid and calcium stearate, so that the composite flame retardant is obtained. Fatty acid can store some heats through the phase transition when being heated to slowed down the speed that the glued membrane temperature of this application rose, delayed the glued membrane and arrived the time point of ignition, helped improving the fire behaviour of glued membrane. In addition, stearic acid can also play a role of a surfactant in a formula system of the epoxy resin film, so that the dispersion of each component in the composite flame retardant in the epoxy resin film is promoted, and the improvement of the uniformity of the epoxy resin film is facilitated.
Preferably, the composite flame retardant comprises the following components in parts by weight: 4-8 parts of ammonium polyphosphate, 6-10 parts of calcium stearate, 16-20 parts of stearic acid, 32-36 parts of inorganic adsorbent and 8-12 parts of silane coupling agent.
By adopting the technical scheme, the raw material proportion of the composite flame retardant is optimized, and the flame retardant property of the adhesive film is improved.
Preferably, the inorganic adsorbent is bentonite or zeolite powder.
By adopting the technical scheme, the bentonite and the zeolite powder both belong to inorganic adsorbents, and compared with the zeolite powder, the bentonite is easier to prepare suspension and has better compatibility with organic matters, so that the operation difficulty is lower when the bentonite is selected as the inorganic adsorbent, and the inorganic adsorbent and the adhesive film using the inorganic adsorbent are easier to apply and popularize.
Preferably, the silane coupling agent has an epoxy group in a molecule.
By adopting the technical scheme, when the silane coupling agent has epoxy groups in molecules, the epoxy groups can be introduced to the surface of the inorganic adsorbent through grafting between the silane coupling agent and the inorganic adsorbent, and the epoxy groups on the surface of the inorganic adsorbent can react with a part of curing agent in the process of preparing the epoxy film and then are crosslinked with the epoxy resin, so that the compatibility between the epoxy resin and the composite flame retardant is increased, the structural defects in the epoxy resin film are reduced, the air isolation effect of the epoxy resin film is improved, and the flame retardant property of the adhesive film is favorably improved.
Preferably, the formulation of the epoxy resin film further comprises 6 to 10 parts by weight of diisocyanate.
By adopting the technical scheme, the diisocyanate can play a role in promoting the ring-opening reaction with the epoxy group, on one hand, the diisocyanate increases the crosslinking density of the epoxy resin and reduces the free epoxy resin residues in the epoxy resin film, and on the other hand, the diisocyanate can also promote the combination between the inorganic adsorbent in the composite flame retardant and the epoxy resin, so that the density of the epoxy resin film is increased, and the improvement of the flame retardant property of the adhesive film is facilitated. In addition, residues after reaction of diisocyanate and epoxy groups have good adhesive property to metal aluminum and oxide films on the surfaces of the metal aluminum, so that the adhesive strength between the adhesive film and the aluminum plate part is increased.
Preferably, the formula of the epoxy resin film further comprises 14-18 parts by weight of toughening filler, wherein the toughening filler comprises at least one of modified rubber powder and asphalt powder, and the modified rubber powder is prepared by the following method:
(1) crushing the fluororubber which is not vulcanized to obtain fluororubber powder;
(2) and (3) heating the fluororubber powder in an oxidizing atmosphere for 5-10min to obtain the modified rubber powder.
By adopting the technical scheme, the modified rubber powder and the asphalt powder have good compatibility with the epoxy resin and belong to elastic materials, so that the possibility of brittle failure of the epoxy resin film can be reduced, the toughness of the adhesive film is improved, the possibility of tearing of the adhesive film by external force is reduced, and the adhesive strength of the adhesive film is improved. In the process of preparing the modified rubber powder, the fluororubber powder is partially oxidized in an oxidizing atmosphere, and active groups generated in the oxidized fluororubber powder can react with diisocyanate, so that the toughening filler in the epoxy resin film is indirectly combined with the epoxy resin through the diisocyanate, and the toughness of the adhesive film is further improved. In addition, the modified rubber powder is prepared from the fluororubber powder, the fluororubber has better oxidation resistance, and the heating treatment time is only 5-10min, so the oxidation treatment has less influence on the mechanical property of the fluororubber powder; the unvulcanized part of the fluororubber powder is easily oxidized even at normal temperature, and the oxidation rate is increased under heat treatment conditions. The selected fluororubber powder can generate enough active groups through oxidation treatment for 5-10min under the heating condition, so that the modified rubber powder can react with diisocyanate.
Preferably, the toughening filler further comprises dihydrate gypsum powder.
By adopting the technical scheme, the dihydrate gypsum powder can release the crystal water when the adhesive film is combined with the aluminum plate part, the crystal water released by the dihydrate gypsum is diffused outside the adhesive film and then wets the surface of the aluminum plate for a short time, and the diisocyanate residue on the surface of the adhesive film can form a complex with the aluminum plate under the wet condition of the aluminum plate, so that the bonding strength between the adhesive film and the aluminum plate part is increased. In addition, the dihydrate gypsum with the crystal water removed can also absorb the water permeating into the adhesive film, thereby reducing the humidity inside the adhesive film and being beneficial to improving the insulating property of the adhesive film.
In a second aspect, the application provides a preparation method of a flame-retardant insulating adhesive film for a side plate of a power battery cell module, which adopts the following technical scheme.
(1) Heating the epoxy resin to a molten state under the water bath heating condition, then adding the composite flame retardant, the curing agent, the accelerator and the auxiliary agent into the molten epoxy resin, and uniformly stirring to obtain an epoxy resin glue solution;
(2) coating epoxy resin glue solution on a PET film, and then standing the PET film coated with the epoxy resin glue solution until the epoxy resin glue solution loses fluidity to obtain an epoxy resin film;
(3) covering a PE protective film on the surface of the epoxy resin glue film, and then compacting the PE protective film, the epoxy resin film and the PET adhesive film to obtain the flame-retardant insulating adhesive film for the side plate of the power battery cell module.
By adopting the technical scheme, the composite flame retardant, the curing agent, the accelerator and the auxiliary agent are mixed under the water-bath heating condition to obtain the epoxy resin glue solution, then the epoxy resin glue solution is pre-cured on the surface of the PET film to obtain the epoxy resin film, and the PE protective film is covered on the epoxy resin film to obtain the flame-retardant insulating glue film for the side plate of the power battery cell module.
In summary, the present application has the following beneficial effects:
1. this application chooses for use to contain ammonium polyphosphate and calcium stearate's compound fire retardant performance fire-retardant effect, and when the glued membrane received the flame firing, ammonium polyphosphate can decompose on the one hand and produce ammonia dilution and separation air, and on the other hand can also carry out the carbomorphism to the organic component in the glued membrane to promote the separation effect to the air through forming the carbomorphism membrane, thereby realize fire-retardant. The decomposition product of the calcium stearate can react with polyphosphoric acid generated by decomposing ammonium polyphosphate to form calcium polyphosphate particles, and the calcium polyphosphate particles can fill the carbonized film, so that the density of the carbonized film is increased, and the air barrier effect of the carbonized film is improved.
2. In the application, the inorganic adsorbent is preferably used as a carrier of ammonium polyphosphate, the inorganic adsorbent is coated by stearic acid, and calcium stearate is introduced into the inorganic adsorbent by using stearic acid as the carrier, so that the preparation of the composite flame retardant is completed. The calcium stearate has good water-blocking performance, can reduce the possibility of water permeating into the epoxy resin film, improves the resistance of the epoxy resin film, and is beneficial to improving the insulating performance of the adhesive film.
3. According to the method, the epoxy resin glue solution is obtained by mixing and heating the components, then the epoxy resin glue solution is pre-cured on the surface of the PET film to obtain the epoxy resin film, and then the PE protective film is used for covering the epoxy resin film to obtain the flame-retardant insulating glue film for the side plate of the power battery cell module.
Detailed Description
The present application will be described in further detail with reference to examples and preparations.
The starting materials used in the preparation examples of the present application are all commercially available.
Preparation example of composite flame retardant
The following will explain preparation example 1 as an example.
Preparation example 1
In the preparation example, the composite flame retardant is prepared according to the following method:
(1) preparing 4kg of ammonium polyphosphate into an aqueous solution, uniformly mixing the aqueous solution of the ammonium polyphosphate with 32kg of an inorganic adsorbent to obtain a suspension, and standing the suspension; in the step, zeolite powder is selected as the inorganic adsorbent;
(2) adding 8kg of silane coupling agent into the suspension, and then heating the suspension in a water bath to obtain silane modified suspension; in the step, the silane coupling agent is methyl triethoxysilane;
(3) vacuum drying to remove water in the silane modified suspension, adding the rest solid matter, 16kg of stearic acid and 6kg of calcium stearate into 150kg of absolute ethyl alcohol, stirring for 15min, evaporating to remove the ethyl alcohol, collecting the evaporated ethyl alcohol, and completely evaporating the ethyl alcohol to obtain the composite flame retardant.
As shown in Table 1, the preparation examples 1 to 5 were different in the raw material ratio.
TABLE 1
Preparation example 6
The difference between the preparation example and the preparation example 3 is that bentonite is used as the inorganic adsorbent.
Preparation example 7
The difference between the preparation example and the preparation example 3 is that gamma- (2, 3-epoxypropoxy) propyl trimethoxy silane is used as the silane coupling agent.
Preparation example of modified rubber powder
Preparation example 8 is described below as an example.
Preparation example 8
In the preparation example, the modified rubber powder was prepared according to the following method: (1) crushing unvulcanized fluororubber to an average particle size of 0.075mm to obtain fluororubber powder;
(2) heating 20kg of fluororubber powder in ozone atmosphere at 50 deg.C for 3min to obtain modified rubber powder.
As shown in Table 2, production examples 8 to 12 were different in that the fluororubber powders were heated in an ozone atmosphere for different times.
TABLE 2
| Sample(s) | Preparation example 8 | Preparation example 9 | Preparation example 10 | Preparation example 11 | Preparation example 12 |
| Heating time/min | 3 | 5 | 7 | 10 | 12 |
Examples
The raw materials used in the examples of the present application are all commercially available, and among them, the epoxy resin is epoxy resin E44.
Examples 1 to 5
The following description will be given by taking example 1 as an example.
Example 1
The flame-retardant insulating adhesive film for the side plate of the power battery cell module in the embodiment 1 is prepared according to the following steps:
(1) heating 100kg of epoxy resin to a molten state under a water bath heating condition of 75 ℃, then adding 16kg of the composite flame retardant of preparation example 1, 15kg of the curing agent, 1.4kg of the accelerator and 6kg of the auxiliary agent into the molten epoxy resin, and uniformly stirring to obtain an epoxy resin glue solution; in the step, triethylene tetramine is used as a curing agent, 2,4, 6-tris (dimethylaminomethyl) phenol is used as an accelerator, and a leveling agent EFKA3777 and a defoaming agent PL-200 which are mixed according to the weight ratio of 1:1 are used as auxiliaries;
(2) coating epoxy resin glue solution on a PET film, and then standing the PET film coated with the epoxy resin glue solution until the epoxy resin glue solution loses fluidity to obtain an epoxy resin film;
(3) covering a PE protective film on the surface of the epoxy resin glue film, and then carrying out hot-pressing treatment on the PE protective film, the epoxy resin film and the PET adhesive film to obtain a flame-retardant insulating adhesive film for a side plate of the power battery cell module; in this step, the temperature of the hot pressing treatment was 80 ℃.
As shown in Table 3, examples 1 to 5 differ mainly in the ratio of raw materials
TABLE 3
Example 6
The present example is different from example 3 in that the composite flame retardant is the composite flame retardant of preparation example 2.
As shown in Table 4, example 3 is different from examples 6 to 11 in the preparation examples of the composite flame retardant.
TABLE 4
| Sample(s) | Preparation example of composite flame retardant |
| Example 3 | Preparation example 1 |
| Example 6 | Preparation example 2 |
| Example 7 | Preparation example 3 |
| Example 8 | Preparation example 4 |
| Example 9 | Preparation example 5 |
| Example 10 | Preparation example 6 |
| Example 11 | Preparation example 7 |
Example 12
This example is different from example 11 in that the epoxy resin film further includes 6kg of diphenylmethane diisocyanate in the formulation, and the diphenylmethane diisocyanate and the epoxy resin are uniformly mixed in the step (1) of preparing the adhesive film.
As shown in Table 5, examples 12 to 16 differ in the amount of diphenylmethane diisocyanate used.
TABLE 5
Example 17
The difference between this embodiment and embodiment 3 is that the epoxy resin film further includes 14kg of toughening filler in the formulation, the toughening filler is asphalt powder, and the toughening filler is uniformly mixed with the epoxy resin in the step (1) of preparing the adhesive film.
Example 18
This example differs from example 17 in that the toughening filler was the modified rubber powder of preparation 8.
As shown in Table 6, examples 18 to 22 were different in the preparation examples of the modified rubber powders.
TABLE 6
| Sample(s) | Preparation example of modified rubber powder |
| Example 18 | Preparation example 8 |
| Example 19 | Preparation example 9 |
| Example 20 | Preparation example 10 |
| Example 21 | Preparation example 11 |
| Example 22 | Preparation example 12 |
Example 23
This example differs from example 20 in that the toughening filler is a fluoroelastomer powder.
Example 24
This example differs from example 20 in that the toughening filler was formed by mixing 10kg of the modified rubber powder of preparation example 20 and 4kg of dihydrate gypsum powder.
Comparative example
Comparative example 1
The utility model provides an insulating glued membrane of power battery electricity core module curb plate, includes PET glued membrane, epoxy resin membrane and the PE protection film of laminating in proper order along thickness direction. The formula of the epoxy resin film comprises the following raw materials: 110kg of epoxy resin, 20kg of insulating filler, 20kg of curing agent, 1.6kg of accelerator and 8kg of auxiliary agent. Wherein, the curing agent is triethylene tetramine, the accelerator is 2,4, 6-tri (dimethylamino methyl) phenol, the auxiliary agent is flatting agent EFKA3777 and defoamer PL-200 which are mixed according to the weight ratio of 1:1, and the insulating filler is kaolin.
The insulating glue film of the side plate of the power battery cell module is prepared according to the following method:
(1) heating 110kg of epoxy resin to a molten state under a water bath heating condition of 75 ℃, then adding 20kg of insulating filler, 20kg of curing agent, 1.6kg of accelerator and 8kg of auxiliary agent into the molten epoxy resin, and uniformly stirring to obtain an epoxy resin glue solution;
(2) coating epoxy resin glue solution on a PET film, and then standing the PET film coated with the epoxy resin glue solution until the epoxy resin glue solution loses fluidity to obtain an epoxy resin film;
(3) covering a PE protective film on the surface of the epoxy resin glue film, and then compacting the PE protective film, the epoxy resin film and the PET adhesive film to obtain the flame-retardant insulating adhesive film for the side plate of the power battery cell module.
Comparative example 2
This comparative example is different from example 3 in that the raw material of the epoxy resin film does not include the composite flame retardant.
Comparative example 3
This comparative example is different from example 3 in that the composite flame retardant was replaced with ammonium polyphosphate of the same weight.
Comparative example 4
This comparative example is different from example 3 in that the composite flame retardant was replaced with calcium stearate of the same weight.
Performance detection test method
Firstly, the limit oxygen index of the adhesive film is detected by referring to a test method in GB/T2406.1-2008, and the test result is shown in Table 7.
TABLE 7
| Sample(s) | Limiting oxygen index/%) | Sample(s) | Limiting oxygen index/%) |
| Example 1 | 26.8 | Example 11 | 27.5 |
| Example 2 | 26.9 | Example 12 | 27.7 |
| Example 3 | 27.0 | Example 13 | 27.8 |
| Example 4 | 27.9 | Example 14 | 28.0 |
| Example 5 | 27.9 | Example 15 | 28.0 |
| Example 6 | 27.2 | Example 16 | 28.0 |
| Example 7 | 27.3 | Comparative example 1 | 23.2 |
| Example 8 | 27.1 | Comparative example 2 | 19.4 |
| Example 9 | 27.1 | Comparative example 3 | 20.7 |
| Example 10 | 27.3 | Comparative example 4 | 20.6 |
Secondly, compounding the adhesive film and the aluminum plate into a whole by using a hot press, and then detecting the adhesive strength of the adhesive film adhered to the surface of the aluminum plate according to GB/T2792-2014, wherein the results are shown in Table 8.
TABLE 8
| Sample(s) | Bonding Strength/(N/mm) |
| Example 3 | 7.2 |
| Example 11 | 7.2 |
| Example 14 | 8.5 |
| Example 17 | 8.4 |
| Example 18 | 8.7 |
| Example 19 | 9.0 |
| Example 20 | 9.2 |
| Example 21 | 9.1 |
| Example 22 | 8.7 |
| Example 23 | 8.5 |
| Example 24 | 9.5 |
| Comparative example 1 | 7.0 |
Thirdly, curing the adhesive film for 30min at 150 ℃, after the adhesive film is completely cooled, detecting the volume resistivity of the adhesive film according to GB/T15662-1995, and the detection result is shown in Table 9.
TABLE 9
| Sample(s) | Volume resistivity/107Ω |
| Example 3 | 2.55 |
| Example 17 | 2.56 |
| Example 20 | 2.89 |
| Example 24 | 3.16 |
| Comparative example 1 | 2.47 |
It can be seen from the combination of examples 1-5 and comparative example 1 and table 7 that the limiting oxygen indexes measured in examples 1-5 are all higher than that in comparative example 1, which indicates that in the epoxy resin film of the present application, ammonia gas generated by decomposition of ammonium polyphosphate blocks and dilutes oxygen around flames, the polyphosphoric acid generated by decomposition of ammonium polyphosphate promotes organic components in the adhesive film to be converted into a carbonized film, and the carbonized film blocks oxygen, so that the adhesive film of the present application has better flame retardant performance compared with the adhesive film of the related art.
When the composite flame retardant is not added or does not contain one of ammonium polyphosphate and calcium stearate, the flame retardant performance of the prepared adhesive film is poor as can be seen by combining the example 3 and the comparative examples 2 to 4 and combining the table 7.
By combining example 3 with examples 6-9 and table 7, it can be seen that, among the composite flame retardants of preparation examples 1-5, the adhesive film prepared by using the composite flame retardant of preparation example 3 has better flame retardant performance.
It can be seen from the combination of examples 7 and 10 and table 7 that the limiting oxygen indexes measured in examples 7 and 10 are close to each other, which indicates that after the composite flame retardant prepared by using bentonite and zeolite powder is added into the epoxy resin film with the same formula system, the finally prepared adhesive film has similar flame retardant performance.
It can be seen by combining examples 7 and 11 and table 7 that the limiting oxygen index measured in example 11 is higher than that in example 7, which indicates that the silane coupling agent containing epoxy groups introduces epoxy groups to the surface of the inorganic adsorbent, increases the compatibility between the epoxy resin and the composite flame retardant, reduces the structural defects in the epoxy resin film, improves the air-insulating effect of the epoxy resin film, and improves the flame retardant property of the adhesive film.
It can be seen by combining example 11, examples 12-16 and table 7 that the limiting oxygen indexes measured in examples 12-16 are all higher than example 11, which indicates that diisocyanate increases the crosslinking density of epoxy resin, improves the density of epoxy resin film, and is helpful for improving the flame retardant property of the adhesive film.
Combining example 3, comparative example 1, example 14 and table 8, it can be seen that the bond strengths of example 3 and comparative example 1 are close.
It can be seen from the combination of example 11 and example 14 and table 8 that the bonding strength measured in example 14 is higher than that in example 11, which shows that the addition of diisocyanate can improve the flame retardant property of the adhesive film, and the residue after the reaction of diisocyanate and epoxy group has good adhesion property with metal aluminum and the oxide film on the surface of metal aluminum, thereby increasing the bonding strength between the adhesive film and the aluminum plate part.
It can be seen by combining examples 17-23 and table 8 that the adhesive strengths measured in examples 17-23 are all higher than example 3, which shows that the addition of the toughening filler can improve the toughness of the adhesive film, reduce the possibility that the adhesive film is torn by external force, and contribute to improving the adhesive property of the adhesive film. The bonding strength of the rubber films obtained in examples 18-22 is higher than that of examples 17 and 23, which shows that the modified rubber powder of the present application is more beneficial to improving the bonding strength of the rubber films compared with asphalt powder and common fluororubber powder. The bonding strength of examples 18 to 22, only examples 19 to 21, was 9N/mm or more, and it was demonstrated that the time for heating the fluororubber powder in an oxidizing atmosphere was preferably 5 to 10min when the modified rubber powder of the present application was produced.
When the toughening filler contains calcium sulfate dihydrate powder, after crystal water released by the dihydrate gypsum diffuses out of the adhesive film, the crystal water in a free state wets the surface of the aluminum plate for a short time, and diisocyanate residues on the surface of the adhesive film can form a complex with the aluminum plate under the condition that the aluminum plate is wetted, so that the bonding strength between the adhesive film and the aluminum plate part is increased.
Combining example 3, example 17, comparative example 1 and table 9, it can be seen that the volume resistivities measured in example 3 and example 17 are close to each other and are higher than those measured in comparative example 1, which indicates that the calcium stearate of the present application can block moisture from entering the epoxy resin film, and the adhesive film of the present application has better insulating property compared with the adhesive film of the related art.
It can be seen from the combination of example 17 and example 20 and table 9 that the volume resistivity measured in example 20 is higher than that in example 17, which illustrates that the insulation performance of the adhesive film is further improved by utilizing the insulation effect of the modified rubber powder after the modified rubber powder is added in example 20.
It can be seen from the combination of examples 20 and 24 and table 9 that the volume resistivity measured in example 24 is higher than that in example 20, which indicates that the calcium sulfate dihydrate powder can absorb the moisture penetrating into the epoxy resin film after dehydration, so that the epoxy resin film is dried, the resistance of the adhesive film is improved, and the insulating property of the adhesive film is improved.
The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.
Claims (10)
1. The utility model provides a fire-retardant insulating glued membrane for power battery electricity core module curb plate which characterized in that, fire-retardant insulating glued membrane includes PET glued membrane, epoxy resin film and the PE protection film of laminating in proper order along thickness direction, epoxy resin film's formula includes the raw materials of following parts by weight: 100-120 parts of epoxy resin, 16-24 parts of composite flame retardant, 15-25 parts of curing agent, 1.4-1.8 parts of accelerator and 6-10 parts of auxiliary agent, wherein the components of the composite flame retardant comprise ammonium polyphosphate and calcium stearate.
2. The flame-retardant insulating adhesive film for the side plate of the power battery cell module of claim 1, wherein the formula of the epoxy resin film comprises the following raw materials in parts by weight: 115 parts of epoxy resin 105, 18-22 parts of composite flame retardant, 17-23 parts of curing agent, 1.5-1.7 parts of accelerator and 7-9 parts of auxiliary agent.
3. The flame-retardant insulating adhesive film for the side plate of the power battery cell module of claim 1, wherein the composite flame retardant is prepared by the following method:
(1) preparing ammonium polyphosphate into an aqueous solution, uniformly mixing the aqueous solution of ammonium polyphosphate with an inorganic adsorbent to obtain a suspension, and standing the suspension;
(2) adding a silane coupling agent into the suspension, and then heating the suspension in a water bath to obtain a silane modified suspension;
(3) removing water in the silane modified suspension, then putting the residual solid matter, stearic acid and calcium stearate into absolute ethyl alcohol, stirring uniformly, and evaporating to remove the ethyl alcohol to obtain the composite flame retardant.
4. The flame-retardant insulating adhesive film for the side plate of the power battery cell module of claim 3, wherein the composite flame retardant comprises the following components in parts by weight: 4-8 parts of ammonium polyphosphate, 6-10 parts of calcium stearate, 16-20 parts of stearic acid, 32-36 parts of inorganic adsorbent and 8-12 parts of silane coupling agent.
5. The flame-retardant insulating adhesive film for the side plate of the power battery cell module according to claim 3, wherein the inorganic adsorbent is bentonite or zeolite powder.
6. The flame-retardant insulating glue film for the side plate of the power battery cell module as claimed in claim 3, wherein the silane coupling agent has an epoxy group in a molecule.
7. The flame-retardant insulating adhesive film for the side plate of the power battery cell module of claim 6, wherein the formulation of the epoxy resin film further comprises 6-10 parts by weight of diisocyanate.
8. The flame-retardant insulating glue film for the side plate of the power battery cell module according to claim 7, wherein the epoxy resin film further comprises 14-18 parts by weight of a toughening filler, the toughening filler comprises at least one of modified rubber powder and asphalt powder, and the modified rubber powder is prepared by the following method:
(1) crushing the fluororubber which is not vulcanized to obtain fluororubber powder;
(2) and (3) heating the fluororubber powder in an oxidizing atmosphere for 5-10min to obtain the modified rubber powder.
9. The flame-retardant insulating glue film for the side plate of the power battery cell module of claim 8, wherein the toughening filler further comprises dihydrate gypsum powder.
10. The preparation method of the flame-retardant insulating adhesive film for the side plate of the power battery cell module according to any one of claims 1 to 9, characterized by comprising the following steps:
(1) heating the epoxy resin to a molten state under the water bath heating condition, then adding the composite flame retardant, the curing agent, the accelerator and the auxiliary agent into the molten epoxy resin, and uniformly stirring to obtain an epoxy resin glue solution;
(2) coating epoxy resin glue solution on a PET film, and then standing the PET film coated with the epoxy resin glue solution until the epoxy resin glue solution loses fluidity to obtain an epoxy resin film;
(3) covering a PE protective film on the surface of the epoxy resin glue film, and then compacting the PE protective film, the epoxy resin film and the PET adhesive film to obtain the flame-retardant insulating adhesive film for the side plate of the power battery cell module.
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| CN113773612A (en) * | 2021-10-26 | 2021-12-10 | 株洲电力机车广缘科技有限责任公司 | Flame-retardant epoxy resin insulating material and preparation method and application thereof |
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| CN102294718A (en) * | 2011-08-23 | 2011-12-28 | 中南林业科技大学 | Attapulgite-based nano-scale wood fire retardant |
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