CN114724856A - Welding sheet type aluminum electrolytic capacitor electrolyte and preparation method thereof - Google Patents
Welding sheet type aluminum electrolytic capacitor electrolyte and preparation method thereof Download PDFInfo
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- CN114724856A CN114724856A CN202210430643.4A CN202210430643A CN114724856A CN 114724856 A CN114724856 A CN 114724856A CN 202210430643 A CN202210430643 A CN 202210430643A CN 114724856 A CN114724856 A CN 114724856A
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- 239000003792 electrolyte Substances 0.000 title claims abstract description 149
- 239000003990 capacitor Substances 0.000 title claims abstract description 59
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 54
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 54
- 238000002360 preparation method Methods 0.000 title claims description 32
- 238000003466 welding Methods 0.000 title description 2
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 60
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims abstract description 47
- SATJMZAWJRWBRX-UHFFFAOYSA-N azane;decanedioic acid Chemical compound [NH4+].[NH4+].[O-]C(=O)CCCCCCCCC([O-])=O SATJMZAWJRWBRX-UHFFFAOYSA-N 0.000 claims abstract description 41
- 238000005476 soldering Methods 0.000 claims abstract description 31
- 150000002148 esters Chemical class 0.000 claims abstract description 30
- GPEVMRFAFMVKHK-UHFFFAOYSA-N azane;dodecanedioic acid Chemical compound [NH4+].[NH4+].[O-]C(=O)CCCCCCCCCCC([O-])=O GPEVMRFAFMVKHK-UHFFFAOYSA-N 0.000 claims abstract description 29
- ACVYVLVWPXVTIT-UHFFFAOYSA-N phosphinic acid Chemical compound O[PH2]=O ACVYVLVWPXVTIT-UHFFFAOYSA-N 0.000 claims abstract description 29
- 229920002845 Poly(methacrylic acid) Polymers 0.000 claims abstract description 25
- SXFJDZNJHVPHPH-UHFFFAOYSA-N 3-methylpentane-1,5-diol Chemical compound OCCC(C)CCO SXFJDZNJHVPHPH-UHFFFAOYSA-N 0.000 claims abstract description 24
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000001257 hydrogen Substances 0.000 claims abstract description 20
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 20
- 230000001737 promoting effect Effects 0.000 claims abstract description 17
- GPLRAVKSCUXZTP-UHFFFAOYSA-N diglycerol Chemical compound OCC(O)COCC(O)CO GPLRAVKSCUXZTP-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000002994 raw material Substances 0.000 claims abstract description 11
- 239000002904 solvent Substances 0.000 claims abstract description 8
- 229940105990 diglycerin Drugs 0.000 claims abstract description 3
- 238000003756 stirring Methods 0.000 claims description 62
- 229920000036 polyvinylpyrrolidone Polymers 0.000 claims description 35
- 239000001267 polyvinylpyrrolidone Substances 0.000 claims description 35
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 claims description 35
- APUPEJJSWDHEBO-UHFFFAOYSA-P ammonium molybdate Chemical compound [NH4+].[NH4+].[O-][Mo]([O-])(=O)=O APUPEJJSWDHEBO-UHFFFAOYSA-P 0.000 claims description 33
- 229940010552 ammonium molybdate Drugs 0.000 claims description 33
- 235000018660 ammonium molybdate Nutrition 0.000 claims description 33
- 239000011609 ammonium molybdate Substances 0.000 claims description 33
- 239000011888 foil Substances 0.000 claims description 30
- 238000010438 heat treatment Methods 0.000 claims description 28
- 239000007788 liquid Substances 0.000 claims description 28
- 239000000243 solution Substances 0.000 claims description 19
- 239000003761 preservation solution Substances 0.000 claims description 17
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 15
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 12
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 10
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 8
- 239000000377 silicon dioxide Substances 0.000 claims description 8
- BTJIUGUIPKRLHP-UHFFFAOYSA-N 4-nitrophenol Chemical compound OC1=CC=C([N+]([O-])=O)C=C1 BTJIUGUIPKRLHP-UHFFFAOYSA-N 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 6
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 claims description 5
- 229960000583 acetic acid Drugs 0.000 claims description 5
- 235000019253 formic acid Nutrition 0.000 claims description 5
- 239000012362 glacial acetic acid Substances 0.000 claims description 5
- OTLNPYWUJOZPPA-UHFFFAOYSA-N 4-nitrobenzoic acid Chemical compound OC(=O)C1=CC=C([N+]([O-])=O)C=C1 OTLNPYWUJOZPPA-UHFFFAOYSA-N 0.000 claims description 4
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 4
- 238000001035 drying Methods 0.000 claims description 3
- 229920000642 polymer Polymers 0.000 claims description 2
- 239000002516 radical scavenger Substances 0.000 claims description 2
- 150000003863 ammonium salts Chemical class 0.000 claims 1
- 230000000149 penetrating effect Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 13
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 18
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 14
- 238000006703 hydration reaction Methods 0.000 description 12
- 230000000052 comparative effect Effects 0.000 description 10
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 10
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 8
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 8
- 238000004321 preservation Methods 0.000 description 8
- 230000036571 hydration Effects 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 6
- -1 hydroxyl alcohol Chemical compound 0.000 description 4
- 238000001179 sorption measurement Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 229910019142 PO4 Inorganic materials 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 125000000449 nitro group Chemical group [O-][N+](*)=O 0.000 description 3
- 239000010452 phosphate Substances 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 2
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 239000005871 repellent Substances 0.000 description 2
- 230000002441 reversible effect Effects 0.000 description 2
- 238000005063 solubilization Methods 0.000 description 2
- 230000007928 solubilization Effects 0.000 description 2
- ISIJQEHRDSCQIU-UHFFFAOYSA-N tert-butyl 2,7-diazaspiro[4.5]decane-7-carboxylate Chemical compound C1N(C(=O)OC(C)(C)C)CCCC11CNCC1 ISIJQEHRDSCQIU-UHFFFAOYSA-N 0.000 description 2
- 235000006506 Brasenia schreberi Nutrition 0.000 description 1
- 244000267222 Brasenia schreberi Species 0.000 description 1
- HNSXTXGBUQTIHZ-UHFFFAOYSA-N [N+](=O)([O-])C1=CC=C(C=C1)OC=O.N Chemical compound [N+](=O)([O-])C1=CC=C(C=C1)OC=O.N HNSXTXGBUQTIHZ-UHFFFAOYSA-N 0.000 description 1
- 210000003489 abdominal muscle Anatomy 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- JZIWMKUVMWKKLP-UHFFFAOYSA-N azane;4-nitrobenzoic acid Chemical compound [NH4+].[O-]C(=O)C1=CC=C([N+]([O-])=O)C=C1 JZIWMKUVMWKKLP-UHFFFAOYSA-N 0.000 description 1
- VJCJAQSLASCYAW-UHFFFAOYSA-N azane;dodecanoic acid Chemical compound [NH4+].CCCCCCCCCCCC([O-])=O VJCJAQSLASCYAW-UHFFFAOYSA-N 0.000 description 1
- AGVBUFRTWKTYON-UHFFFAOYSA-N azanium;12-hydroxy-12-oxododecanoate Chemical compound N.OC(=O)CCCCCCCCCCC(O)=O AGVBUFRTWKTYON-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000007767 bonding agent Substances 0.000 description 1
- 230000002301 combined effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 239000012024 dehydrating agents Substances 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 125000004185 ester group Chemical group 0.000 description 1
- 238000005886 esterification reaction Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000012046 mixed solvent Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000005543 nano-size silicon particle Substances 0.000 description 1
- 239000005486 organic electrolyte Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 229920006316 polyvinylpyrrolidine Polymers 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
Images
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
- H01G9/004—Details
- H01G9/022—Electrolytes; Absorbents
- H01G9/035—Liquid electrolytes, e.g. impregnating materials
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
- H01G9/0029—Processes of manufacture
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
- H01G9/004—Details
- H01G9/02—Diaphragms; Separators
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
- H01G9/145—Liquid electrolytic capacitors
-
- 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
- Y02E60/13—Energy storage using capacitors
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Manufacturing & Machinery (AREA)
- Electric Double-Layer Capacitors Or The Like (AREA)
- Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
Abstract
The application relates to a soldering lug type aluminum electrolytic capacitor electrolyte, which relates to the technical field of electrolyte and comprises the following raw materials in parts by weight: ethylene glycol: 55-65 parts; diglycerin: 15-25 parts; ammonium dodecanedioate: 2-6 parts; ammonium sebacate: 5-15 parts; a waterproof agent: 2-3 parts of a solvent; a hydrogen eliminating agent: 1-2 parts; flash fire promoting agent: 0.5-1.5 parts; the waterproof agent is a mixed ester prepared from polymethacrylic acid, 3-methyl-1, 5-pentanediol and hypophosphorous acid. The application has the effect of improving the waterproof performance of the electrolyte.
Description
Technical Field
The application relates to electrolyte, in particular to soldering lug type aluminum electrolytic capacitor electrolyte and a preparation method thereof.
Background
At present, the aluminum electrolytic capacitor is the most widely applied basic element in electronic products, and can be used as a filter and a bypass of an electronic circuit and also can play a role in coupling and decoupling.
In the prior art, when an aluminum electrolytic capacitor works, electrolyte can generate water, and the water can reduce the heating of a capacitor system when the capacitor system works and improve the solubility of the electrolyte; when the electrolyte works, if water is excessive, an oxide film on the surface of the anode aluminum foil is hydrated, so that the performance of the oxide film is damaged, and phosphoric acid or phosphate is generally added into the electrolyte to prevent hydration reaction.
In view of the above-mentioned related art, the inventors have considered that phosphoric acid or phosphate has a strong acidity and a corrosive action on an aluminum oxide film, and although the hydration reaction of the electrolyte can be prevented for a short time, the effect is not good, so that it is necessary to prepare an electrolyte having a strong hydration resistance.
Disclosure of Invention
The application aims to improve the waterproof performance of electrolyte and provides the soldering lug type aluminum electrolytic capacitor electrolyte and the preparation method thereof.
In a first aspect, the application provides a soldering lug type aluminum electrolytic capacitor electrolyte, which adopts the following technical scheme:
a soldering lug type aluminum electrolytic capacitor electrolyte is prepared from the following raw materials in parts by weight:
ethylene glycol: 55-65 parts;
diglycerin: 15-25 parts;
ammonium dodecanedioate: 2-6 parts;
ammonium sebacate: 5-15 parts;
a waterproof agent: 2-3 parts of a solvent;
a hydrogen eliminating agent: 1-2 parts;
flash fire promoting agent: 0.5-1.5 parts;
the waterproof agent is a mixed ester prepared from polymethacrylic acid, 3-methyl-1, 5-pentanediol and hypophosphorous acid.
By adopting the technical scheme, the electrolyte is prepared by mixing ethylene glycol and diglycerol to serve as a solvent of the electrolyte, ammonium dodecate and ammonium sebacate to serve as solutes of the electrolyte, the mixed solutes are better dissolved in the mixed solvent, and the gas released from the working electrolyte is eliminated by adding the hydrogen eliminating agent, so that the pressure inside the capacitor is reduced; the rated voltage of the capacitor during working can be improved by adding the flash promoting agent; the waterproof mixture is added to prevent the water in the electrolyte from reacting with the aluminum oxide film; the commonly used waterproof agent is phosphoric acid or phosphate, so that the hydration of an aluminum oxide film is effectively inhibited; in an electrolyte system, the acidity of phosphoric acid is strong, if the phosphoric acid in the electrolyte system is too much, the phosphoric acid is easy to corrode an oxide film, the amount of the phosphoric acid is small, the waterproof effect is not durable, and meanwhile, the temperature of the electrolyte is increased in the working process, phosphate ions are not stable, and the waterproof effect is easy to lose; therefore, the mixed ester is prepared from the polymethacrylic acid, the 3-methyl-1, 5-pentanediol and the hypophosphorous acid, the mixed ester is used as a waterproof agent and is added into the electrolyte component, carboxyl of the polymethacrylic acid and the hypophosphorous acid and hydroxyl of the 3-methyl-1, 5-pentanediol are subjected to esterification reaction, the generated esterified substance is attached to the aluminum foil, and the prepared waterproof agent can effectively prevent water molecules from invading and reacting with an oxide film on the surface of the aluminum foil through the cooperation of the polymethacrylic acid, the 3-methyl-1, 5-pentanediol and the hypophosphorous acid, so that the waterproof property of the electrolyte is improved; meanwhile, the application uses hypophosphorous acid as a raw material for preparing the waterproof agent, replaces hypophosphorous acid per se as the waterproof agent, and reduces the amount of phosphoric acid in the electrolyte, so that the durability of the waterproof effect of the electrolyte is improved, and the service life of a capacitor containing the electrolyte is prolonged.
Preferably, the electrolyte is prepared from the following raw materials in parts by weight:
polyvinylpyrrolidone: 1-2 parts;
ammonium molybdate: 0.5 to 1.5 portions.
Through adopting above-mentioned technical scheme, polyvinylpyrrolidone has better film forming ability and solubilization condensation, adsorption that polyvinylpyrrolidone can be better is on the aluminium oxide film, ammonium molybdate has the oxidability, can prevent effectively that the aluminium oxide film from droing, add polyvinylpyrrolidone and ammonium molybdate in electrolyte, polyvinylpyrrolidone, ammonium molybdate, ammonium dodecanedioic acid and ammonium sebacate cooperate jointly, the surface tension of electrolyte has been reduced, make the hydrone of electrolyte during operation difficult adsorption to the aluminium oxide film, thereby effectively improve the waterproof closed nature of electrolyte.
Preferably, the preparation method of the mixed ester comprises the following steps:
heating and stirring hypophosphorous acid and polymethacrylic acid, adding formic acid and glacial acetic acid when a polymer is dissolved, and continuously heating and stirring to obtain viscous liquid; adding the 3-methyl-1, 5-pentanediol into the viscous liquid, mixing and stirring, and drying to obtain the mixed ester.
By adopting the technical scheme, the hypophosphorous acid can form a protective film on the surface of an oxide film in the aluminum electrolytic capacitor, and can effectively inhibit the reaction of water molecules in the electrolyte and the oxide film; if excessive hypophosphorous acid is added, phosphate ions of the hypophosphorous acid easily corrode an oxide film in a system; if the addition amount of the hypophosphorous acid is too small, the waterproof effect is poor, so that the service life of the capacitor is short;
according to the preparation method, the mixed ester prepared by mixing hypophosphorous acid, polymethacrylic acid and 3-methyl-1, 5-pentanediol is used as a dehydrating agent, so that the hydration reaction can be effectively inhibited, and the service life of the capacitor is prolonged; the carboxyl in hypophosphorous acid and polymethacrylic acid reacts with the hydroxyl in 3-methyl-1, 5-pentanediol to form ester group, and water is removed after drying, so that the mixed ester is not easy to generate reversible reaction; the polymethacrylic acid has better adhesiveness; the 3-methyl-1, 5-pentanediol is branched-chain hydroxyl alcohol, so that water generated in the reaction of the electrolyte can be effectively reduced in the components of the electrolyte, and the reversible reaction of the mixed ester caused by the overhigh water content in the electrolyte can be effectively avoided; 3-methyl-1, 5-pentanediol is an isomer and has more branched chains, so that the generated mixed ester has a more stable structure; the mixed ester is taken as a waterproof agent and is attached to an aluminum oxide film in the electrolyte, so that the aluminum oxide film is not easy to contact with water in the electrolyte, and the waterproof effect of the electrolyte is further improved.
Preferably, the mass ratio of the polymethacrylic acid to the 3-methyl-1, 5-pentanediol to the hypophosphorous acid is (1.8-2.4): 1: (2.8-3.2).
By adopting the technical scheme, when the mixed ester prepared from the polymethacrylic acid, the 3-methyl-1, 5-pentanediol and the hypophosphorous acid in a specific ratio has a better waterproof effect in the electrolyte, the prepared mixed ester can reduce the surface tension of the electrolyte in the electrolyte, and prevents phosphate ions in the electrolyte from reacting with an aluminum oxide film, so that the prepared mixed ester has good waterproof property.
Preferably, the mass ratio of ammonium dodecanedioate, ammonium sebacate, polyvinylpyrrolidone and ammonium molybdate is (3.2-3.6): (8.1-8.7): (1.6-1.8): 1.
by adopting the technical scheme, when ammonium dodecanedioate, ammonium sebacate, polyvinylpyrrolidone and ammonium molybdate are in a specific weight ratio, the polyvinylpyrrolidone, the ammonium molybdate, the ammonium dodecanedioate and the ammonium sebacate are matched together, so that the surface tension of the electrolyte is reduced, the ammonium dodecanedioate and the ammonium sebacate can be uniformly distributed in the electrolyte as a solvent, the stability of the electrolyte is improved, the polyvinylpyrrolidone enables water molecules of the electrolyte to be difficult to react with an aluminum oxide membrane, and the waterproof effect of the electrolyte is improved; meanwhile, ammonium molybdate and polyvinylpyrrolidone can excite ammonium ions in ammonium dodecanedioate and ammonium sebacate to dissociate in the electrolyte, so that the conductivity of the electrolyte is improved.
Preferably, the hydrogen eliminating agent comprises one or more of p-nitrobenzoic acid, p-nitrophenol and p-nitrophenol ammonium formate, and more preferably, the hydrogen eliminating agent is p-nitrophenol.
By adopting the technical scheme, various hydrogen scavengers all have nitro groups, the nitro groups have better reducibility, and the nitro groups can absorb hydrogen when the hydrogen scavengers are added into the electrolyte.
Preferably, the flash fire promoting agent comprises one or more of nano silica, a silane coupling agent and citric acid, and more preferably, the flash fire promoting agent is nano silica.
Through adopting above-mentioned technical scheme, add the promotion agent of sparking and can make the performance of electrolyte more stable, improve electrolyte membrane's intensity in the electrolyte, during special use nanometer silica adds electrolyte for the promotion agent of sparking, nanometer silica can adsorb on the anode surface to improve electrolyte's sparking voltage.
In a second aspect, the present application provides a soldering lug type aluminum electrolytic capacitor, which adopts the following technical scheme:
a soldering lug type aluminum electrolytic capacitor comprises a shell, wherein an anode foil and a cathode foil are arranged in the shell, the anode foil and the cathode foil penetrate through the shell, electrolyte is arranged in the shell, and one ends, extending into the shell, of the anode foil and one ends, extending into the shell, of the cathode foil are immersed in the electrolyte; an aluminum sheet is fixedly connected to the anode foil.
By adopting the technical scheme, the anode foil provided with the aluminum sheet is the anode of the capacitor, the shell is the abdominal muscle of the capacitor, the electrolyte is filled in the shell, and the cathode foil and the anode foil are both immersed in the electrolyte.
In a third aspect, the present application provides a method for preparing an electrolyte for a tab-type aluminum electrolytic capacitor, which adopts the following technical scheme,
a preparation method of a soldering lug type aluminum electrolytic capacitor electrolyte comprises the following steps:
s1, mixing and heating ethylene glycol and diglycerol, adding ammonium dodecanedioate, and stirring to obtain a stirring solution;
s2, cooling the stirred solution, and adding ammonium sebacate for stirring to obtain a heat preservation solution;
and S3, adding the waterproof agent, the hydrogen eliminating agent and the flash fire promoting agent into the heat preservation solution, dissolving and stirring to obtain the electrolyte.
By adopting the technical scheme, the raw materials of the electrolyte are mixed and stirred step by step, the dispersibility of the raw materials in the electrolyte is improved, meanwhile, the ammonium dodecanedioate and the ammonium sebacate are respectively added into the solvent, the solubility of the ammonium dodecanedioate and the ammonium sebacate serving as solutes in the solvent is promoted, the electrolyte is fully mixed, and the electrolyte with high hydration resistance is obtained.
Preferably, S1, mixing and heating ethylene glycol and diglycerol, adding ammonium dodecanedioate for heating, and stirring to obtain a stirring solution;
s2, cooling the stirred solution, and then adding ammonium sebacate, polyvinylpyrrolidone and ammonium molybdate for stirring to obtain a heat preservation solution;
and S3, adding the waterproof agent, the hydrogen eliminating agent and the flash fire promoting agent into the heat preservation solution, dissolving and stirring to obtain the electrolyte.
By adopting the technical scheme, the polyvinyl pyrrolidone, the ammonium molybdate and the ammonium sebacate are mixed together and then added into the stirring liquid, so that the common matching of the ammonium dodecanoate, the ammonium sebacate, the polyvinyl pyrrolidone and the ammonium molybdate can be promoted, and the water compatibility of the electrolyte is improved.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the prepared waterproof bonding agent can effectively prevent water molecules from invading to react with an oxide film on the surface of the aluminum foil through the joint matching of the polymethacrylic acid, the 3-methyl-1, 5-pentanediol and the hypophosphorous acid, so that the waterproof bonding property of the electrolyte is improved;
2. the mixed ester prepared from the polymethacrylic acid, the 3-methyl-1, 5-pentanediol and the hypophosphorous acid in a specific ratio has a better waterproof effect in the electrolyte, and meanwhile, the prepared mixed ester can reduce the surface tension of the electrolyte in the electrolyte and prevent phosphate ions in the electrolyte from reacting with an aluminum oxide film, so that the prepared mixed ester has good waterproof effect;
3. under the specific weight proportion of ammonium dodecanedioate, ammonium sebacate, polyvinylpyrrolidone and ammonium molybdate, the polyvinylpyrrolidone, the ammonium molybdate, the ammonium dodecanedioate and the ammonium sebacate are matched together, so that the surface tension of the electrolyte is reduced, and the ammonium dodecanedioate and the ammonium sebacate serving as solvents can be uniformly distributed in the electrolyte, so that the stability of the electrolyte is improved.
Drawings
FIG. 1 is a schematic view of the overall structure of embodiment 1 of the present application;
in the figure, 1, a housing; 2. an anode foil; 3. a cathode foil; 4. aluminum sheet.
Detailed Description
The present application will be described in further detail with reference to examples.
In the examples of the present application, the sources of the raw materials used are shown in Table 1
| Raw materials | Model number | Manufacturer of the product |
| Ethylene glycol | Chemical Co Ltd | |
| Diglycerol | Jiangsu New materials Co Ltd | |
| Dodecanedioic acid ammonium salt | Jiangsu plerian Biotechnology Ltd | |
| Ammonium sebacate | Nantong Runfeng petrochemical Co., Ltd | |
| Polymethacrylic acid | CM-211 | Dongguan city green high molecular Material Co., Ltd |
| 3-methyl-1, 5-pentanediol | Jiangsu Runfeng synthetic science and technology limited | |
| Hypophosphorous acid | Jinan Yun Baihui Biotech Co Ltd | |
| Polyvinylpyrrolidone | K30 | Jinan Haokun chemical Co Ltd |
| Ammonium molybdate | Shijiazhuang Junsai chemical technology Co Ltd | |
| P-nitrobenzoic acid | Shandong national chemical Co., Ltd | |
| P-nitrophenol | TAIXING YANGZI PHARM CHEMICAL Co.,Ltd. | |
| Ammonium p-nitrophenyl formate | Jiangsu Runfeng synthetic science and technology limited | |
| Nano silicon dioxide | R202 | Boridada (Dongguan) New materials Co., Ltd |
| Silane coupling agent | KH-560 | Dongguan city Changhe chemical Co., Ltd |
| Citric acid | Zhengzhou high research Biotech Co Ltd |
Preparation example
Preparation example 1
The preparation method of the mixed ester comprises the following steps:
putting 10kg of hypophosphorous acid and 10kg of polymethacrylic acid into a stirring kettle, stirring at the temperature of 60 ℃ and the rotating speed of 20rad/min, adding 2kg of formic acid and 2kg of glacial acetic acid after stirring, and continuously stirring at the temperature of 60 ℃ and the rotating speed of 20rad/min to obtain viscous liquid;
5 parts of 3-methyl-1, 5-pentanediol is added into the viscous liquid, mixed and stirred at the rotating speed of 20rad/min, and dried at the temperature of 50 ℃ to obtain mixed ester.
Preparation example 2
Putting 20kg of hypophosphorous acid and 20kg of polymethacrylic acid into a stirring kettle, stirring at the temperature of 60 ℃ and the rotating speed of 20rad/min, adding 8kg of formic acid and 8kg of glacial acetic acid after stirring, and continuously stirring at the temperature of 60 ℃ and the rotating speed of 20rad/min to obtain viscous liquid;
15 parts of 3-methyl-1, 5-pentanediol is added into the viscous liquid, mixed and stirred at the rotating speed of 20rad/min, and dried at the temperature of 50 ℃ to obtain mixed ester.
Preparation example 3
Putting 13.8kg of hypophosphorous acid and 18.6kg of polymethacrylic acid into a stirring kettle, stirring at the temperature of 60 ℃ and the rotating speed of 20rad/min, adding 8kg of formic acid and 8kg of glacial acetic acid after stirring, and continuously stirring at the temperature of 60 ℃ and the rotating speed of 20rad/min to obtain viscous liquid;
6 parts of 3-methyl-1, 5-pentanediol is added into the viscous liquid, mixed and stirred at the rotating speed of 20rad/min, and dried at the temperature of 50 ℃ to obtain mixed ester.
Example 1
A soldering lug type aluminum electrolytic capacitor electrolyte is prepared from the following raw materials: glycol, diglycerol, ammonium dodecanedioate, ammonium sebacate, a waterproof agent, a hydrogen scavenger and a flash promoting agent; wherein the waterproof agent is composed of mixed ester prepared from polymethacrylic acid, 3-methyl-1, 5-pentanediol and hypophosphorous acid; the water-repellent agent was the mixed ester prepared in preparation example 1;
a soldering lug type aluminum electrolytic capacitor, refer to fig. 1, the capacitor includes the body 1, the body 1 is a cylinder, the material of the body 1 is an aluminum product, there are positive pole foil 2 and negative pole foil 3 in the body 1, positive pole foil 2 and negative pole foil 3 are parallel to each other and all wear to locate in the body 1, twine the aluminum sheet 4 on the positive pole foil 2, the positive pole foil 2 is the positive pole, the body 1 is the negative pole; be equipped with electrolyte in the casing 1, electrolyte is the electrolyte that this application prepared, uses the condenser of the electrolyte of this application can improve the life of condenser greatly.
A preparation method of a soldering lug type aluminum electrolytic capacitor electrolyte comprises the following steps:
s1, adding 55kg of ethylene glycol and 15kg of diglycerol into a stirring kettle, heating at the temperature of 60 ℃, adding 2kg of ammonium dodecanedioate into the stirring kettle after heating to the temperature of 80 ℃, stirring at the rotation speed of 25rad/min, and continuously heating to 100 ℃ to obtain a stirring solution;
s2, after the temperature of the stirred liquid is naturally reduced to 80 ℃, adding 5kg of ammonium sebacate, stirring at the rotation speed of 20rad/min, and keeping the temperature at 80 ℃ to obtain heat preservation liquid;
s3, adding 1kg of hydrogen eliminating agent p-nitrobenzoic acid, 0.5kg of flash fire promoting agent citric acid and 2kg of waterproof agent prepared in the preparation example 1 into a heat preservation solution for dissolving, stirring for 3min under the condition that the rotating speed is 20rad/min, and waiting for natural cooling to room temperature to obtain the electrolyte.
Example 2
A soldering lug type aluminum electrolytic capacitor electrolyte is different from the electrolyte of the embodiment 1,
s1, adding 65kg of ethylene glycol and 25kg of diglycerol into a stirring kettle, heating at 60 ℃, adding 6kg of ammonium dodecanedioate into the stirring kettle after heating to 80 ℃, stirring at the rotation speed of 25rad/min, and continuously heating to 100 ℃ to obtain a stirring solution;
s2, after the temperature of the stirred liquid is naturally reduced to 80 ℃, adding 15kg of ammonium sebacate, stirring at the rotation speed of 20rad/min, and keeping the temperature at 80 ℃ to obtain heat preservation liquid;
s3, adding 2kg of hydrogen eliminating agent ammonium p-nitrobenzoate, 1.5kg of flash fire promoting agent silane coupling agent and 3kg of waterproof agent prepared in the preparation example 1 into a heat preservation solution for dissolving, stirring for 3min under the condition that the rotating speed is 20rad/min, and waiting for natural cooling to room temperature to obtain the electrolyte.
Example 3
A difference of a soldering lug type aluminum electrolytic capacitor electrolyte from the embodiment 1 is that,
s1, adding 60kg of ethylene glycol and 20kg of diglycerol into a stirring kettle, heating at the temperature of 60 ℃, adding 4kg of ammonium dodecanedioate into the stirring kettle after heating to the temperature of 80 ℃, stirring at the rotation speed of 25rad/min, and continuously heating to 100 ℃ to obtain a stirring liquid;
s2, after the temperature of the stirred liquid is naturally reduced to 80 ℃, adding 10kg of ammonium sebacate, stirring at the rotation speed of 20rad/min, and keeping the temperature at 80 ℃ to obtain heat preservation liquid;
s3, adding 1.5kg of hydrogen eliminating agent p-nitrophenol, 1kg of flash fire promoting agent nano-silica and 1.5kg of waterproof agent prepared in the preparation example 1 into a heat preservation solution for dissolving, stirring for 3min under the condition that the rotating speed is 20rad/min, and waiting for natural cooling to room temperature to obtain the electrolyte.
Example 4
The difference between the soldering lug type aluminum electrolytic capacitor electrolyte and the embodiment 3 is that: in the preparation step of S3, 1.5kg of hydrogen eliminating agent p-nitrophenol, 1kg of flash promoting agent nano-silica and 1.5kg of hydration preventing agent prepared in preparation example 2 are added into the heat preservation solution to be dissolved, stirred for 3min under the condition that the rotating speed is 20rad/min, and naturally cooled to the room temperature to obtain the electrolyte.
Example 5
The difference between the soldering lug type aluminum electrolytic capacitor electrolyte and the embodiment 3 is that: in the preparation step of S3, 1.5kg of hydrogen eliminating agent p-nitrophenol, 1kg of flash promoting agent nano-silica and 1.5kg of hydration preventing agent prepared in preparation example 3 are added into the heat preservation solution to be dissolved, stirred for 3min under the condition that the rotating speed is 20rad/min, and naturally cooled to the room temperature to obtain the electrolyte.
Example 6
A difference of the soldering lug type aluminum electrolytic capacitor electrolyte from the embodiment 3 is that in the preparation step of S2, after the temperature of the stirred liquid is naturally reduced to 80 ℃, 10kg of ammonium sebacate, 1kg of polyvinylpyrrolidone and 0.5kg of ammonium molybdate are added and stirred at the rotation speed of 20rad/min and the temperature is kept at 80 ℃ to obtain the heat preservation liquid.
Example 7
A difference of the soldering lug type aluminum electrolytic capacitor electrolyte from the embodiment 3 is that in the preparation step of S2, after the temperature of the stirred liquid is naturally reduced to 80 ℃, 10kg of ammonium sebacate, 2kg of polyvinylpyrrolidone and 1.5kg of ammonium molybdate are added and stirred at the rotation speed of 20rad/min and the temperature is kept at 80 ℃ to obtain the heat preservation liquid.
Example 8
A difference of the soldering lug type aluminum electrolytic capacitor electrolyte from the embodiment 3 is that in the preparation step of S2, after the temperature of the stirred liquid is naturally reduced to 80 ℃, 10kg of ammonium sebacate, 1.5kg of polyvinylpyrrolidone and 1kg of ammonium molybdate are added and stirred at the rotation speed of 20rad/min and the temperature is kept at 80 ℃ to obtain the heat preservation liquid.
Example 9
The difference between the soldering lug type aluminum electrolytic capacitor electrolyte and the embodiment 3 is that:
s1, adding 60kg of ethylene glycol and 20kg of diglycerol into a stirring kettle, heating at 60 ℃, adding 3.2kg of ammonium dodecanedioate, stirring at a rotation speed of 25rad/min and continuously heating to 100 ℃ after heating to 80 ℃, and thus obtaining a stirring solution;
in the step of S2, after the temperature of the stirred solution is naturally decreased to 80 ℃, 8.1kg of ammonium sebacate, 1.5kg of polyvinylpyrrolidone and 1kg of ammonium molybdate are added and stirred at a rotation speed of 20rad/min and the temperature is kept at 80 ℃ to obtain the heat preservation solution.
Example 10
A difference between the soldering lug type aluminum electrolytic capacitor electrolyte and the embodiment 3 is that,
s1, adding 60kg of ethylene glycol and 20kg of diglycerol into a stirring kettle, heating at 60 ℃, adding 3.6kg of ammonium dodecanedioate, stirring at a rotation speed of 25rad/min and continuously heating to 100 ℃ after heating to 80 ℃, and thus obtaining a stirring solution;
in the step of S2, after the temperature of the stirred solution is naturally decreased to 80 ℃, 8.7kg of ammonium sebacate, 1.8kg of polyvinylpyrrolidone and 1kg of ammonium molybdate are added and stirred at a rotation speed of 20rad/min and the temperature is kept at 80 ℃ to obtain the heat preservation solution.
Example 11
A difference between the soldering lug type aluminum electrolytic capacitor electrolyte and the embodiment 3 is that,
s1, adding 60kg of ethylene glycol and 20kg of diglycerol into a stirring kettle, heating at 60 ℃, adding 3.4kg of ammonium dodecanedioate, stirring at a rotation speed of 25rad/min and continuously heating to 100 ℃ after heating to 80 ℃, and thus obtaining a stirring solution;
in the step of S2, after the temperature of the stirred solution is naturally decreased to 80 ℃, 8.4kg of ammonium sebacate, 1.7kg of polyvinylpyrrolidone and 1kg of ammonium molybdate are added and stirred at a rotation speed of 20rad/min and the temperature is kept at 80 ℃ to obtain the heat preservation solution.
Example 12
The difference between the preparation step of S2 and the step of naturally cooling the stirred solution to 80 ℃, then 10kg of ammonium sebacate, 1.7kg of polyvinylpyrrolidone and 1kg of ammonium molybdate were added and stirred at a rotation speed of 20rad/min and the temperature was maintained at 80 ℃ to obtain a heat-insulating solution.
Example 13
A difference between the soldering lug type aluminum electrolytic capacitor electrolyte and the embodiment 11 is that in the preparation step of S2, after the temperature of the stirred liquid is naturally reduced to 80 ℃, 8.4kg of ammonium sebacate, 1.2kg of polyvinylpyrrolidone and 1kg of ammonium molybdate are added and stirred at the rotation speed of 20rad/min and the temperature is kept at 80 ℃ to obtain the heat preservation liquid.
Example 14
A difference between the soldering lug type aluminum electrolytic capacitor electrolyte and the embodiment 11 is that in the preparation step of S2, after the temperature of the stirred liquid is naturally reduced to 80 ℃, 8.4kg of ammonium sebacate and 1.7kg of polyvinylpyrrolidone are added and stirred at the rotation speed of 20rad/min and the temperature is kept at 80 ℃ to obtain the heat preservation liquid.
Example 15
The difference between the soldering lug type aluminum electrolytic capacitor electrolyte and the embodiment 10 is that in the preparation step of S2, after the temperature of the stirred solution is naturally reduced to 80 ℃, 8.4kg of ammonium sebacate and 1kg of ammonium molybdate are added and stirred at the rotating speed of 20rad/min and the temperature is kept at 80 ℃ to obtain the heat preservation solution.
Comparative example
Comparative example 1
A tab type aluminum electrolytic capacitor electrolyte, which is different from example 1 in that phosphorous acid is substituted for the same amount of the water-repellent agent prepared in preparation example 1 in step S3.
Comparative example 2
A tab type aluminum electrolytic capacitor electrolyte is different from that of example 1 in that the same amount of polymethacrylic acid as that of preparation example 1 was replaced with hypophosphorous acid.
Comparative example 3
A soldering lug type aluminum electrolytic capacitor electrolyte is different from the electrolyte of the embodiment 1 in that phosphorous acid in the preparation 1 is replaced by polymethacrylic acid with the same quantity.
Performance test
And (3) waterproof reaction test: the electrolytes prepared in examples 1 to 15 and comparative examples 1 to 3 were applied to capacitors, and the service lives of the capacitors were tested at 105 c, thereby testing the hydration reaction resistance of the electrolytes.
And (3) conductivity test: the electrolytes prepared in examples 1 to 15 and comparative examples 1 to 3 were respectively subjected to conductivity tests, and the conductivity of the electrolytes was tested using a conductivity meter having a measurement range (0 to 100) mS/cm in accordance with SJ/T11732 to 2018, organic electrolyte Specification for supercapacitor.
TABLE 2
| Capacitor life/h | With or without hydration reaction | Electrical conductivity of | |
| Example 1 | 3200 | Is free of | 1.60 |
| Example 2 | 3220 | Is free of | 1.62 |
| Example 3 | 3300 | Is free of | 1.62 |
| Example 4 | 3350 | Is free of | 1.63 |
| Example 5 | 3400 | Is free of | 1.65 |
| Example 6 | 3800 | Is free of | 1.68 |
| Example 7 | 3840 | Is free of | 1.67 |
| Example 8 | 3900 | Is free of | 1.69 |
| Example 9 | 4200 | Is free of | 1.81 |
| Example 10 | 4220 | Is free of | 1.83 |
| Example 11 | 4400 | Is free of | 1.86 |
| Example 12 | 4000 | Is free of | 1.75 |
| Example 13 | 3980 | Is free of | 1.74 |
| Example 14 | 3280 | Is free of | 1.68 |
| Example 15 | 3300 | Is free of | 1.68 |
| Comparative example 1 | 2400 | Light and slight | 1.55 |
| Comparative example 2 | 1500 | Is provided with | 1.53 |
| Comparative example 3 | 800 | Severe severity of disease | 1.26 |
As can be seen from comparison of data of examples 1 to 3 and comparative examples 1 to 3 in Table 2, the use of a mixed ester of polymethacrylic acid, 3-methyl-1, 5-pentanediol and hypophosphorous acid as a waterproof agent can effectively prevent hydration of an electrolyte, and the service life of a capacitor using the electrolyte is greatly improved, and the mixed ester is attached to the surface of an aluminum oxide film on an anode foil and can effectively prevent water molecules generated during operation of the electrolyte from invading and reacting with the oxide film on the surface of the aluminum foil, thereby improving the waterproof effect of the electrolyte.
According to the comparison of the data of example 1 and examples 3 to 5, when the mass ratio of the polymethacrylic acid, the 3-methyl-1, 5-pentanediol and the hypophosphorous acid is (1.8-2.4): 1: (2.8-3.2), the surface tension of the electrolyte can be reduced in the electrolyte by the prepared mixed ester, and the reaction between phosphate ions in the electrolyte and an aluminum oxide film is prevented, so that the prepared mixed ester has good waterproof performance, and the service life of the capacitor can be greatly prolonged by using the electrolyte prepared by the method.
As can be seen from the comparison of the data in example 3 and examples 6 to 8, the addition of polyvinylpyrrolidone and ammonium molybdate can improve the hydration resistance of the electrolyte and can improve the service life of the capacitor; polyvinylpyrrolidone has better film forming ability and solubilization condensation, adsorption that polyvinylpyrrolidone can be better is on the aluminium oxide film, ammonium molybdate has the oxidability, can prevent effectively that the aluminium oxide film from droing, add polyvinylpyrrolidone and ammonium molybdate in electrolyte, polyvinylpyrrolidone, ammonium molybdate, ammonium dodecanedioate and ammonium sebacate cooperate jointly, the surface tension of electrolyte has been reduced, make the hydrone of electrolyte during operation difficult adsorption to the aluminium oxide film, thereby effectively improve the waterproof of electrolyte and close.
From a comparison of the data of examples 9 to 15, it can be seen that the conductivity of the electrolyte is low when ammonium dodecanedioate, ammonium sebacate, polyvinylpyrrolidone and ammonium molybdate are not in a specific ratio or one of them is absent; when the ammonium dodecanedioate, the ammonium sebacate, the polyvinylpyrrolidone and the ammonium molybdate are in a specific weight ratio (3.2-3.6): (8.1-8.7): (1.6-1.8): under 1, further reduce the surface tension of electrolyte, improve the dispersibility of each component of electrolyte, make the hydrone of electrolyte be difficult for reacting with aluminium oxidation film, improved the waterproof combined effect of electrolyte, the life of condenser improves greatly, still discovers simultaneously that ammonium molybdate and polyvinylpyrrolidone can arouse ammonium ion among ammonium dodecasulfate and the ammonium sebacate and dissociate in electrolyte to the conductivity of electrolyte has been improved.
The embodiments of the present disclosure are all preferred embodiments of the present disclosure, and the protection scope of the present disclosure is not limited thereby, wherein like parts are designated by like reference numerals. Therefore, the method comprises the following steps: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (10)
1. The soldering lug type aluminum electrolytic capacitor electrolyte is characterized by comprising the following raw materials in parts by weight:
ethylene glycol: 55-65 parts;
diglycerin: 15-25 parts;
ammonium dodecanedioate: 2-6 parts;
ammonium sebacate: 5-15 parts;
a waterproof agent: 2-3 parts of a solvent;
a hydrogen eliminating agent: 1-2 parts;
flash fire promoting agent: 0.5-1.5 parts;
the waterproof agent is mixed ester prepared from polymethacrylic acid, 3-methyl-1, 5-pentanediol and hypophosphorous acid.
2. The soldering lug type aluminum electrolytic capacitor electrolyte according to claim 1, wherein the electrolyte is prepared from the following raw materials in parts by weight:
polyvinylpyrrolidone: 1-2 parts;
ammonium molybdate: 0.5 to 1.5 portions.
3. The soldering lug type aluminum electrolytic capacitor electrolyte as claimed in claim 1, wherein the preparation method of the mixed ester comprises the following steps:
heating and stirring 10-20 parts of hypophosphorous acid and 10-20 parts of polymethacrylic acid, adding 2-8 parts of formic acid and 2-8 parts of glacial acetic acid when a polymer is dissolved, and continuously heating and stirring to obtain viscous liquid; and adding 5-15 parts of 3-methyl-1, 5-pentanediol into the viscous liquid, mixing and stirring, and drying to obtain the mixed ester.
4. The soldering lug type aluminum electrolytic capacitor electrolyte as claimed in claim 3, wherein the mass ratio of the polymethacrylic acid, the 3-methyl-1, 5-pentanediol and the hypophosphorous acid is (1.8-2.4): 1: (2.8-3.2).
5. The electrolyte for a tab type aluminum electrolytic capacitor according to claim 2, wherein the mass ratio of ammonium dodecanedioate, ammonium sebacate, polyvinylpyrrolidone and ammonium molybdate is (3.2-3.6): (8.1-8.7): (1.6-1.8): 1.
6. the solder-type aluminum electrolytic capacitor electrolyte as recited in claim 1, wherein the hydrogen scavenger comprises one or more of p-nitrobenzoic acid, p-nitrophenol, and p-nitrobenzoic ammonium salt.
7. The electrolyte for a tab type aluminum electrolytic capacitor according to claim 1, wherein the flash promoting agent comprises one or more of nano silica, silane coupling agent and citric acid.
8. A soldering lug type aluminum electrolytic capacitor based on the electrolyte of any one of claims 1 to 7, which is characterized by comprising a shell (1), wherein an anode foil (2) and a cathode foil (3) are arranged in the shell (1), the anode foil (2) and the cathode foil (3) are both arranged in the shell (1) in a penetrating manner, the electrolyte is arranged in the shell (1), and one ends of the anode foil (2) and the cathode foil (3) extending into the shell (1) are both immersed in the electrolyte.
9. A method for preparing an electrolyte of a soldering lug type aluminum electrolytic capacitor, which is used for preparing the electrolyte of any one of claims 1 to 7, and is characterized by comprising the following steps:
s1, mixing and heating ethylene glycol and diglycerol, adding ammonium dodecanedioate, and stirring to obtain a stirring solution;
s2, cooling the stirred solution, and adding ammonium sebacate for stirring to obtain a heat preservation solution;
and S3, adding the waterproof agent, the hydrogen eliminating agent and the flash fire promoting agent into the heat preservation solution, dissolving and stirring to obtain the electrolyte.
10. The method for preparing the electrolyte of the tab-type aluminum electrolytic capacitor according to claim 9,
s1, mixing and heating ethylene glycol and diglycerol, adding ammonium dodecanedioate, and stirring to obtain a stirring solution;
s2, cooling the stirred solution, and adding ammonium sebacate, polyvinylpyrrolidone and ammonium molybdate for stirring to obtain a heat preservation solution;
and S3, adding the waterproof agent, the hydrogen eliminating agent and the flash fire promoting agent into the heat preservation solution, dissolving and stirring to obtain the electrolyte.
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