CN112837939A - High-temperature-resistant high-voltage electrolyte and aluminum electrolytic capacitor using same - Google Patents
High-temperature-resistant high-voltage electrolyte and aluminum electrolytic capacitor using same Download PDFInfo
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- 239000003792 electrolyte Substances 0.000 title claims abstract description 64
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 36
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 36
- 239000003990 capacitor Substances 0.000 title claims abstract description 29
- 239000002904 solvent Substances 0.000 claims abstract description 23
- -1 carboxylic acid ammonium salt Chemical class 0.000 claims abstract description 22
- YEJRWHAVMIAJKC-UHFFFAOYSA-N 4-Butyrolactone Chemical compound O=C1CCCO1 YEJRWHAVMIAJKC-UHFFFAOYSA-N 0.000 claims abstract description 14
- 229920001971 elastomer Polymers 0.000 claims abstract description 7
- QCDWFXQBSFUVSP-UHFFFAOYSA-N 2-phenoxyethanol Chemical compound OCCOC1=CC=CC=C1 QCDWFXQBSFUVSP-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000003381 stabilizer Substances 0.000 claims abstract description 4
- 150000001875 compounds Chemical class 0.000 claims description 9
- 239000000835 fiber Substances 0.000 claims description 9
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 claims description 8
- 239000011888 foil Substances 0.000 claims description 7
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 6
- 239000002202 Polyethylene glycol Substances 0.000 claims description 6
- 125000003118 aryl group Chemical group 0.000 claims description 6
- 229920001223 polyethylene glycol Polymers 0.000 claims description 6
- 229920000459 Nitrile rubber Polymers 0.000 claims description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 5
- ARKIFHPFTHVKDT-UHFFFAOYSA-N 1-(3-nitrophenyl)ethanone Chemical compound CC(=O)C1=CC=CC([N+]([O-])=O)=C1 ARKIFHPFTHVKDT-UHFFFAOYSA-N 0.000 claims description 4
- BNMJSBUIDQYHIN-UHFFFAOYSA-N butyl dihydrogen phosphate Chemical compound CCCCOP(O)(O)=O BNMJSBUIDQYHIN-UHFFFAOYSA-N 0.000 claims description 4
- 230000000087 stabilizing effect Effects 0.000 claims description 4
- CFBYEGUGFPZCNF-UHFFFAOYSA-N 2-nitroanisole Chemical compound COC1=CC=CC=C1[N+]([O-])=O CFBYEGUGFPZCNF-UHFFFAOYSA-N 0.000 claims description 3
- JKTYGPATCNUWKN-UHFFFAOYSA-N 4-nitrobenzyl alcohol Chemical compound OCC1=CC=C([N+]([O-])=O)C=C1 JKTYGPATCNUWKN-UHFFFAOYSA-N 0.000 claims description 3
- FBPFZTCFMRRESA-FSIIMWSLSA-N D-Glucitol Natural products OC[C@H](O)[C@H](O)[C@@H](O)[C@H](O)CO FBPFZTCFMRRESA-FSIIMWSLSA-N 0.000 claims description 3
- FBPFZTCFMRRESA-KVTDHHQDSA-N D-Mannitol Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@H](O)CO FBPFZTCFMRRESA-KVTDHHQDSA-N 0.000 claims description 3
- FBPFZTCFMRRESA-JGWLITMVSA-N D-glucitol Chemical compound OC[C@H](O)[C@@H](O)[C@H](O)[C@H](O)CO FBPFZTCFMRRESA-JGWLITMVSA-N 0.000 claims description 3
- 229930195725 Mannitol Natural products 0.000 claims description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 3
- 229920003171 Poly (ethylene oxide) Polymers 0.000 claims description 3
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 3
- 229920001131 Pulp (paper) Polymers 0.000 claims description 3
- XSTXAVWGXDQKEL-UHFFFAOYSA-N Trichloroethylene Chemical compound ClC=C(Cl)Cl XSTXAVWGXDQKEL-UHFFFAOYSA-N 0.000 claims description 3
- GJYJYFHBOBUTBY-UHFFFAOYSA-N alpha-camphorene Chemical compound CC(C)=CCCC(=C)C1CCC(CCC=C(C)C)=CC1 GJYJYFHBOBUTBY-UHFFFAOYSA-N 0.000 claims description 3
- FOFMIZPXOAUNDQ-UHFFFAOYSA-N azane;2-methylnonanedioic acid Chemical compound N.N.OC(=O)C(C)CCCCCCC(O)=O FOFMIZPXOAUNDQ-UHFFFAOYSA-N 0.000 claims description 3
- ZJXZSIYSNXKHEA-UHFFFAOYSA-L ethyl phosphate(2-) Chemical compound CCOP([O-])([O-])=O ZJXZSIYSNXKHEA-UHFFFAOYSA-L 0.000 claims description 3
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 claims description 3
- 239000000594 mannitol Substances 0.000 claims description 3
- 235000010355 mannitol Nutrition 0.000 claims description 3
- 229910052698 phosphorus Inorganic materials 0.000 claims description 3
- 239000011574 phosphorus Substances 0.000 claims description 3
- 229920002401 polyacrylamide Polymers 0.000 claims description 3
- 229920001451 polypropylene glycol Polymers 0.000 claims description 3
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 3
- 239000000600 sorbitol Substances 0.000 claims description 3
- STCOOQWBFONSKY-UHFFFAOYSA-N tributyl phosphate Chemical compound CCCCOP(=O)(OCCCC)OCCCC STCOOQWBFONSKY-UHFFFAOYSA-N 0.000 claims description 3
- 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 2
- SPZBYSKKSSLUKN-UHFFFAOYSA-N diazanium;2-butyloctanedioate Chemical compound [NH4+].[NH4+].CCCCC(C([O-])=O)CCCCCC([O-])=O SPZBYSKKSSLUKN-UHFFFAOYSA-N 0.000 claims description 2
- 239000003623 enhancer Substances 0.000 claims description 2
- 244000025254 Cannabis sativa Species 0.000 claims 1
- 235000012766 Cannabis sativa ssp. sativa var. sativa Nutrition 0.000 claims 1
- 235000012765 Cannabis sativa ssp. sativa var. spontanea Nutrition 0.000 claims 1
- 235000009120 camo Nutrition 0.000 claims 1
- 235000005607 chanvre indien Nutrition 0.000 claims 1
- 239000008151 electrolyte solution Substances 0.000 claims 1
- 235000010855 food raising agent Nutrition 0.000 claims 1
- 239000011487 hemp Substances 0.000 claims 1
- 239000000377 silicon dioxide Substances 0.000 claims 1
- 230000006641 stabilisation Effects 0.000 claims 1
- 238000011105 stabilization Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 8
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 abstract description 6
- 229910052739 hydrogen Inorganic materials 0.000 abstract description 6
- 239000001257 hydrogen Substances 0.000 abstract description 6
- 238000009835 boiling Methods 0.000 abstract description 5
- 229920006395 saturated elastomer Polymers 0.000 abstract description 5
- 238000006731 degradation reaction Methods 0.000 abstract description 4
- 230000032050 esterification Effects 0.000 abstract description 4
- 238000005886 esterification reaction Methods 0.000 abstract description 4
- 239000000654 additive Substances 0.000 abstract description 3
- 230000009435 amidation Effects 0.000 abstract description 3
- 238000007112 amidation reaction Methods 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000003960 organic solvent Substances 0.000 abstract description 2
- 239000004411 aluminium Substances 0.000 abstract 2
- 230000002745 absorbent Effects 0.000 abstract 1
- 239000002250 absorbent Substances 0.000 abstract 1
- 238000010521 absorption reaction Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 230000000996 additive effect Effects 0.000 description 2
- 239000005543 nano-size silicon particle Substances 0.000 description 2
- 235000012239 silicon dioxide Nutrition 0.000 description 2
- 235000010356 sorbitol Nutrition 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- HGTUJZTUQFXBIH-UHFFFAOYSA-N (2,3-dimethyl-3-phenylbutan-2-yl)benzene Chemical group C=1C=CC=CC=1C(C)(C)C(C)(C)C1=CC=CC=C1 HGTUJZTUQFXBIH-UHFFFAOYSA-N 0.000 description 1
- YMTFKPVAKZUDPQ-UHFFFAOYSA-N C(CCCCCCC(=O)[O-])(=O)[O-].CC(CC)[NH3+].CC(CC)[NH3+] Chemical compound C(CCCCCCC(=O)[O-])(=O)[O-].CC(CC)[NH3+].CC(CC)[NH3+] YMTFKPVAKZUDPQ-UHFFFAOYSA-N 0.000 description 1
- JYFHYPJRHGVZDY-UHFFFAOYSA-N Dibutyl phosphate Chemical compound CCCCOP(O)(=O)OCCCC JYFHYPJRHGVZDY-UHFFFAOYSA-N 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 239000000010 aprotic solvent Substances 0.000 description 1
- 239000004305 biphenyl Substances 0.000 description 1
- 229920005549 butyl rubber Polymers 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 125000001142 dicarboxylic acid group Chemical group 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- IPCSVZSSVZVIGE-UHFFFAOYSA-N hexadecanoic acid Chemical compound CCCCCCCCCCCCCCCC(O)=O IPCSVZSSVZVIGE-UHFFFAOYSA-N 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- BNJOQKFENDDGSC-UHFFFAOYSA-N octadecanedioic acid Chemical compound OC(=O)CCCCCCCCCCCCCCCCC(O)=O BNJOQKFENDDGSC-UHFFFAOYSA-N 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229940116351 sebacate Drugs 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- TYFQFVWCELRYAO-UHFFFAOYSA-N suberic acid Chemical compound OC(=O)CCCCCCC(O)=O TYFQFVWCELRYAO-UHFFFAOYSA-N 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- 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
- H01G9/145—Liquid electrolytic capacitors
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Electric Double-Layer Capacitors Or The Like (AREA)
Abstract
A high-temp. high-voltage electrolyte and its aluminium electrolytic capacitor are composed of electrolyte, core group soaked in electrolyte, aluminium shell and rubber plug. The electrolyte consists of two solvents, namely gamma-butyrolactone and ethylene glycol phenyl ether. The electrolyte solute mainly comprises organic carboxylic acid ammonium salt with side branched chains at alpha positions, and the additives comprise a flash voltage improver, an oxide film stabilizer, a hydrogen absorbent and the like. The invention has the beneficial effects that: the main solvent and the auxiliary solvent are high-boiling point organic solvents, and the ratio of 7: when the proportion of 3 is matched, the azeotropic point is higher, the saturated vapor pressure is reduced, and the electrolyte prepared by dissolving the ammonium carboxylate with steric hindrance effect formed by the alpha-side chain is not easy to generate the degradation reactions such as esterification, amidation and the like in a high-temperature working environment.
Description
Technical Field
The invention belongs to the technical field of capacitors, and particularly relates to a high-temperature-resistant aluminum electrolytic capacitor.
Background
The traditional aluminum electrolytic capacitor is usually applied to a working environment of-25 to +105 ℃, and is not suitable for use because the degradation reactions such as esterification, amidation and the like are easy to occur and the performance is greatly reduced due to insufficient heat resistance of the electrolyte when the aluminum electrolytic capacitor is used at higher ambient temperature. However, in the recently rapidly developed change-over switch circuit of the electric automobile and the high-power lighting electronic circuit, the aluminum electrolytic capacitor is required to have the capabilities of resisting high voltage (400-450V) and resisting ultra-high temperature (150 ℃), and the current aluminum electrolytic capacitor is difficult to meet the requirements. In order to increase the dielectric strength of the electrolyte, the conventional technique is to decrease the solute concentration and increase the viscosity of the electrolyte, which leads to the disadvantages of accelerating the volatility of the electrolyte in a long-term high-temperature environment, decreasing the forming ability of the electrolyte, and promoting the decomposition of the dicarboxylic acid structure. To overcome this drawback, there is a need for improvements to existing electrolytes.
Disclosure of Invention
The invention provides an electrolytic capacitor, which comprises electrolyte, a core group soaked in the electrolyte, an aluminum shell and a rubber plug for assembling the electrolyte and the core group.
The sparking voltage of the electrolyte is greater than 480V, the electrolyte comprises a main solvent, an auxiliary solvent and a solute, the main solvent accounts for 50-75% of the total weight of the electrolyte, the auxiliary solvent accounts for 5-15% of the total weight of the electrolyte, and the solute accounts for 4-10% of the total weight of the electrolyte. Preferably, the ratio of the main solvent to the auxiliary solvent is 7: 3;
the main solvent is gamma-butyrolactone;
the auxiliary solvent is ethylene glycol phenyl ether;
the solute is mainly alkyl ammonium carboxylate with one or more branched chains at alpha position; the alkyl carboxylic acid ammonium salt is selected from one or more of 2, 15-dimethyl-ammonium hexadecanoate, 2, 17-dimethyl-5-hydroxy-ammonium octadecanedioate, 2-methyl ammonium nonanedioate, ammonium polyterephthalate, 2-butyl ammonium octanedioate, 5, 6-dimethyl ammonium sebacate, 2, 9-diphenyl ammonium sebacate and 1, 7-ammonium octanedioate;
the core group comprises an anode, a cathode and electrolytic paper used for spacing the anode and the cathode, the aluminum purity of the anode foil is more than 99.99%, the aluminum purity of the cathode foil is more than 99.4%, and the electrolytic paper is one or more of wood pulp fiber, D fiber, fibrilia and bast fiber.
The aluminum shell is formed by 98.5 percent of aluminum;
the rubber plug is high-temperature-resistant peroxide-vulcanized hydrogenated nitrile rubber.
Preferably, the electrolyte further includes a spark voltage enhancer, a phosphorus-containing compound for stabilizing an oxide film, a compound for aromatic hydrogen absorption, and the like.
Preferably, the sparking voltage improver for sparking voltage improvement is one or more selected from polyethylene glycol, polyvinyl alcohol, borated polyethylene glycol, polyacrylamide, polyoxyethylene glycol, polyoxypropylene triol, nano silicon dioxide, mannitol and sorbitol, and accounts for 2-10% of the total weight of the electrolyte.
Preferably, the phosphide for stabilizing the oxide film is one or two selected from butyl phosphate, monobutyl phosphate, monoethyl phosphate and ammonium hypophosphite, and the oxide film stabilizer accounts for 0.3-2% of the total weight of the electrolyte.
Preferably, the aromatic hydrogen absorption application compound is one or two of o-nitroanisole, m-nitroacetophenone, p-nitrobenzyl alcohol and p-nitrobenzoic acid. The aromatic hydrogen absorption additive accounts for 0.5-3% of the total weight of the electrolyte.
The working voltage of the capacitor is 400-450V.
Preferably, the rubber plug is made of high-temperature-resistant peroxide-vulcanized hydrogenated nitrile rubber.
The invention has the beneficial effects that: the main solvent and the auxiliary solvent are high-boiling point organic solvents, and the ratio of 7: when the proportion of 3 is matched, the azeotropic point is higher, the saturated vapor pressure is reduced, the electrolyte prepared by dissolving the ammonium carboxylate with steric hindrance effect formed by alpha-side chain is not easy to generate the degradation reactions such as esterification, amidation and the like in the high-temperature working environment, and the matching tightness is 0.6-0.9 g/cm3Capacitor made of electrolytic paper with thickness of 40-70 μm and special butyl rubber plugThe working voltage is 400-450V, and the device can work stably for a long time in an ultra-high temperature environment of 150 ℃.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects solved by the present invention clearer and more obvious, the present invention is further explained with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In the electrolyte of the invention, the gamma-butyrolactone is used as the main solvent, the boiling point is high, and the gamma-butyrolactone is an aprotic solvent, so that the gamma-butyrolactone is not easy to perform esterification degradation reaction with the ammonium carboxylate in a high-temperature environment, and the stability of high-temperature operation can be maintained. But the solubility is low, the saturated steam pressure is high, and the single use is not suitable for the ultra-high temperature environment. Thus, the ethylene glycol phenyl ether with the same high boiling point and low saturated vapor pressure is used as the auxiliary solvent. After a lot of experiments, the ratio of the two is found to be 7: about 3 is preferable, and if the ratio of gamma-butyrolactone is high as in example 2, solubility is poor and saturated vapor pressure is high; if the proportion of ethylene glycol phenyl ether is high, the azeotropic point decreases and the low temperature property also deteriorates.
In the electrolyte of the present invention, one or more of ammonium 2, 15-dimethyl-hexadecanedioate, ammonium 2, 17-dimethyl-5-hydroxy-octadecanedioate, ammonium 2-methylnonanedioate, ammonium polyterephthalate, ammonium 2-butyloctanedioate, ammonium 5, 6-dimethyldecanedioate, ammonium 2, 9-diphenyldecanedioate and ammonium 1, 7-octanedioate may be added, and ammonium 2, 17-dimethyl-5-hydroxy-octadecanedioate and ammonium 2-methylnonanedioate are preferably added because of the presence of a side branch at the α -position, so that the deterioration reaction at high temperature can be suppressed, and the high temperature resistance effect is particularly excellent. The small addition of ammonium polyparaphenylene terephthalate can also serve to increase the flashover voltage.
In the electrolyte, one or more of polyethylene glycol, polyvinyl alcohol, borated polyethylene glycol, polyacrylamide, polyoxyethylene glycol, polyoxypropylene triol, nano silicon dioxide, mannitol and sorbitol can be added as an electrolyte sparking voltage improver, the addition amount is preferably 2-10%, the addition amount is small, the effect of suppressing sparking is poor, and the risk of sparking failure under high temperature conditions is high. When the amount of the additive is large, the viscosity of the electrolyte increases, and the conductivity of the electrolyte decreases.
In the electrolyte of the present invention, one or two of butyl phosphate, monobutyl phosphate, monoethyl phosphate, and ammonium hypophosphite may be added as a phosphide for a positive electrode oxide film stabilizer. Preferably, mono-butyl phosphate and di-butyl phosphate are added for mixing use, the addition amount is preferably 0.5-1.5%, the addition amount is small, and the stabilizing effect on an oxide film is not good; the addition amount is too much, which has a negative effect of reducing the sparking voltage.
In the electrolyte, one or two of o-nitroanisole, m-nitroacetophenone, p-nitrobenzyl alcohol and p-nitrobenzoic acid aromatic compounds can be added as the hydrogen absorbing agent of the electrolyte, preferably m-nitroacetophenone is added, the hydrogen absorbing effect is good, and the addition amount can reach 2%.
The conductivity of the electrolyte is 1.3-1.7 ms/cm, and the sparking voltage is above 480V.
The rubber plug for sealing the capacitor is high-temperature-resistant dicumyl peroxide-sulfhydrylation hydrogenated nitrile rubber.
The present invention will be further described with reference to the following specific examples.
TABLE 1
As can be seen from the table above, the electrolyte provided by the invention has higher boiling point, higher conductivity and higher sparking voltage, and is particularly suitable for high-voltage and ultrahigh-temperature capacitors.
In order to simulate the change of the electrolyte in the capacitor under the ultra-high temperature environment, the electrolyte is put into a sealed stainless steel cylinder and placed in the environment of 150 ℃ for 1000 hours, the conductivity and the weight change of the electrolyte are measured, the data are summarized in the following table,
TABLE 2
As can be seen from the data in the table above, the electrolyte of the invention is placed for a long time at 150 ℃, and the change rate of each parameter is far better than that of the conventional electrolyte. In order to further verify the high-temperature and high-pressure resistant effect of the electrolyte, positive and negative aluminum foils, a core group formed by winding electrolytic paper, a hydrogenated nitrile rubber plug and an aluminum shell are prepared into the aluminum electrolytic capacitor. Specifically, 680VF 0.36. mu.F/cm was used2Positive electrode foil, negative electrode foil with the purity of 99.7% and 3V by pressurization, electrolytic paper with the composite thickness of wood pulp fiber and cotton-flax fiber of 60 μm is wound into a core group, the core group is impregnated with the electrolyte, and an aluminum shell and a rubber plug are assembled, aluminum electrolytic capacitors with the specification of 20PCS400V15 μ F phi 12.5 x 25 are respectively prepared, the high-temperature performance is verified, and the results of a high-temperature ripple load test (RC:105 mA/piece) are recorded in the following table,
TABLE 3
It can be seen from table 1 and table 2 that the aluminum electrolytic capacitor provided by the invention works stably at the ultra-high temperature of 150 ℃, has a small parameter change rate even after a long-time load test, and has good high temperature resistance.
It should be understood that the above-mentioned embodiments are merely preferred embodiments of the present invention, and not restrictive, and any modifications, equivalents or improvements made under the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A high-temperature-resistant high-voltage electrolyte and an aluminum electrolytic capacitor using the same, which comprises the electrolyte and a core group immersed in the electrolyte, and is characterized in that,
the electrolyte comprises a main solvent, an auxiliary solvent and a solute, wherein the main solvent accounts for 50-75% of the total weight of the electrolyte, the auxiliary solvent accounts for 5-15% of the total weight of the electrolyte, and the solute accounts for 4-10% of the total weight of the electrolyte;
the main solvent is gamma-butyrolactone;
the auxiliary solvent is ethylene glycol phenyl ether;
the solute is mainly alkyl carboxylic acid ammonium salt with one or more branched chains at alpha position.
2. The high-temperature-resistant high-voltage electrolyte and the aluminum electrolytic capacitor using the same as claimed in claim 1, wherein the ratio of the main solvent to the auxiliary solvent is 7: 3.
3. the high-temperature-resistant high-voltage electrolyte and the aluminum electrolytic capacitor using the same as claimed in claim 1, wherein the ammonium alkylcarboxylate salt is one or more selected from ammonium 2, 15-dimethyl-hexadecanedioate, ammonium 2, 17-dimethyl-5-hydroxy-octadecanedioate, ammonium 2-methylnonanedioate, ammonium polyparaphenylethanate, ammonium 2-butyloctanedioate, ammonium 5, 6-dimethylsebacate, ammonium 2, 9-diphenylsebacate, and ammonium 1, 7-octanedioate.
4. The high-temperature and high-pressure resistant electrolyte and the aluminum electrolytic capacitor using the same as claimed in claim 1, wherein the anode foil in the core pack has an aluminum purity of 99.99% or more, the cathode foil has an aluminum purity of 99.4% or more, and the electrolytic paper for separating the anode and the cathode is one or more of wood pulp fiber, D fiber, hemp fiber, and bast fiber.
5. The high-temperature and high-voltage resistant electrolyte and the aluminum electrolytic capacitor using the same as claimed in any one of claims 1 to 4, wherein the electrolyte further comprises a sparking voltage raising agent, a phosphorus-containing compound for oxide film stabilization, and an aromatic hydrogen-absorbing compound; the sparking voltage improver accounts for 2-10%, the oxide film stabilizer accounts for 0.3-2% of the total weight of the electrolyte, and the aromatic hydrogen-absorbing compound accounts for 0.5-3% of the total weight of the electrolyte.
6. The high-temperature-resistant high-voltage electrolyte and the aluminum electrolytic capacitor using the same as claimed in claim 5, wherein the sparking voltage enhancer is at least one selected from the group consisting of nano-silica, polyethylene glycol, polyvinyl alcohol, borated polyethylene glycol, polyacrylamide, polyoxyethylene glycol, polyoxypropylene triol, mannitol, and sorbitol.
7. The high-temperature-resistant high-voltage electrolyte solution and the aluminum electrolytic capacitor using the same as claimed in claim 5, wherein the phosphorus-containing compound for stabilizing the oxide film is one or more compounds selected from the group consisting of butyl phosphate, monobutyl phosphate, monoethyl phosphate, and ammonium hypophosphite.
8. The high-temperature-resistant high-voltage electrolyte and the aluminum electrolytic capacitor using the same as claimed in claim 5, wherein the aromatic hydrogen-absorbing compound is at least one of o-nitroanisole, m-nitroacetophenone, p-nitrobenzyl alcohol, and p-nitrobenzoic acid.
9. The high-temperature and high-pressure resistant electrolyte and the aluminum electrolytic capacitor using the same as claimed in claim 1, wherein the aluminum electrolytic capacitor is further provided with an aluminum case and a rubber plug for assembling the electrolyte and the core pack.
10. The high temperature and high pressure resistant electrolyte and aluminum electrolytic capacitor using the same as claimed in claim 9, wherein the aluminum case is 98.5% pure aluminum and the plug is high temperature peroxide-curable hydrogenated nitrile rubber.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110017586.2A CN112837939A (en) | 2021-01-07 | 2021-01-07 | High-temperature-resistant high-voltage electrolyte and aluminum electrolytic capacitor using same |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110017586.2A CN112837939A (en) | 2021-01-07 | 2021-01-07 | High-temperature-resistant high-voltage electrolyte and aluminum electrolytic capacitor using same |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114783777A (en) * | 2022-05-17 | 2022-07-22 | 富之庆电子（深圳）有限公司 | Aluminum electrolytic capacitor for high voltage and electrolyte |
| CN115116751A (en) * | 2022-07-19 | 2022-09-27 | 深圳市新中元电子有限公司 | Aluminum electrolytic capacitor electrolyte, preparation method thereof and aluminum electrolytic capacitor |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1244459A (en) * | 1969-03-25 | 1971-09-02 | Phillips Electronic And Associ | Capacitor electrolytes |
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| CN105280385A (en) * | 2014-06-11 | 2016-01-27 | 东莞市东阳光电容器有限公司 | Working electrolyte for slender-type high-voltage aluminum electrolyte capacitors |
| CN106910634A (en) * | 2016-09-14 | 2017-06-30 | 深圳市中元吉康电子有限公司 | The high pressure super-low impedance aluminium electrolutic capacitor of EMI excellents |
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| GB1244459A (en) * | 1969-03-25 | 1971-09-02 | Phillips Electronic And Associ | Capacitor electrolytes |
| JP2005100956A (en) * | 2003-09-05 | 2005-04-14 | Ube Ind Ltd | Dopant, conductive polymer containing dopant and solid electrolytic capacitor using polymer |
| US20140162143A1 (en) * | 2011-07-28 | 2014-06-12 | Wako Pure Chemical Industries, Ltd. | Electrolyte solution for electrochemical devices |
| CN105280385A (en) * | 2014-06-11 | 2016-01-27 | 东莞市东阳光电容器有限公司 | Working electrolyte for slender-type high-voltage aluminum electrolyte capacitors |
| CN106910634A (en) * | 2016-09-14 | 2017-06-30 | 深圳市中元吉康电子有限公司 | The high pressure super-low impedance aluminium electrolutic capacitor of EMI excellents |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114783777A (en) * | 2022-05-17 | 2022-07-22 | 富之庆电子（深圳）有限公司 | Aluminum electrolytic capacitor for high voltage and electrolyte |
| CN115116751A (en) * | 2022-07-19 | 2022-09-27 | 深圳市新中元电子有限公司 | Aluminum electrolytic capacitor electrolyte, preparation method thereof and aluminum electrolytic capacitor |
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