CN114005679B - Aluminum electrolytic capacitor for gallium nitride charger and preparation method thereof - Google Patents
Aluminum electrolytic capacitor for gallium nitride charger and preparation method thereof Download PDFInfo
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- 239000003990 capacitor Substances 0.000 title claims abstract description 77
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 46
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 46
- 229910002601 GaN Inorganic materials 0.000 title claims abstract description 31
- JMASRVWKEDWRBT-UHFFFAOYSA-N Gallium nitride Chemical compound [Ga]#N JMASRVWKEDWRBT-UHFFFAOYSA-N 0.000 title claims abstract description 31
- 238000002360 preparation method Methods 0.000 title claims abstract description 18
- 239000003792 electrolyte Substances 0.000 claims abstract description 46
- WNLRTRBMVRJNCN-UHFFFAOYSA-N adipic acid Chemical compound OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 claims abstract description 24
- CXMXRPHRNRROMY-UHFFFAOYSA-N sebacic acid Chemical compound OC(=O)CCCCCCCCC(O)=O CXMXRPHRNRROMY-UHFFFAOYSA-N 0.000 claims abstract description 24
- KDYFGRWQOYBRFD-UHFFFAOYSA-N Succinic acid Natural products OC(=O)CCC(O)=O KDYFGRWQOYBRFD-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000011888 foil Substances 0.000 claims abstract description 22
- 239000000654 additive Substances 0.000 claims abstract description 21
- 230000000996 additive effect Effects 0.000 claims abstract description 21
- 229920000223 polyglycerol Polymers 0.000 claims abstract description 19
- 238000000034 method Methods 0.000 claims abstract description 15
- 239000002904 solvent Substances 0.000 claims abstract description 15
- 238000004804 winding Methods 0.000 claims abstract description 14
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical class CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000001361 adipic acid Substances 0.000 claims abstract description 12
- 235000011037 adipic acid Nutrition 0.000 claims abstract description 12
- -1 carbon chain carboxylic acid ammonium salt Chemical class 0.000 claims abstract description 12
- 238000007789 sealing Methods 0.000 claims abstract description 12
- 238000005470 impregnation Methods 0.000 claims abstract description 11
- 230000032683 aging Effects 0.000 claims abstract description 10
- KDYFGRWQOYBRFD-NUQCWPJISA-N butanedioic acid Chemical compound O[14C](=O)CC[14C](O)=O KDYFGRWQOYBRFD-NUQCWPJISA-N 0.000 claims abstract description 10
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 29
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 21
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 claims description 21
- CGFYHILWFSGVJS-UHFFFAOYSA-N silicic acid;trioxotungsten Chemical compound O[Si](O)(O)O.O=[W]1(=O)O[W](=O)(=O)O[W](=O)(=O)O1.O=[W]1(=O)O[W](=O)(=O)O[W](=O)(=O)O1.O=[W]1(=O)O[W](=O)(=O)O[W](=O)(=O)O1.O=[W]1(=O)O[W](=O)(=O)O[W](=O)(=O)O1 CGFYHILWFSGVJS-UHFFFAOYSA-N 0.000 claims description 15
- 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 9
- 229930195725 Mannitol Natural products 0.000 claims description 9
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 claims description 9
- 239000004327 boric acid Substances 0.000 claims description 9
- CKKXWJDFFQPBQL-UHFFFAOYSA-N diazanium;but-2-enedioate Chemical compound [NH4+].[NH4+].[O-]C(=O)C=CC([O-])=O CKKXWJDFFQPBQL-UHFFFAOYSA-N 0.000 claims description 9
- 229910052739 hydrogen Inorganic materials 0.000 claims description 9
- 239000001257 hydrogen Substances 0.000 claims description 9
- 235000010355 mannitol Nutrition 0.000 claims description 9
- 239000000594 mannitol Substances 0.000 claims description 9
- ACVYVLVWPXVTIT-UHFFFAOYSA-N phosphinic acid Chemical compound O[PH2]=O ACVYVLVWPXVTIT-UHFFFAOYSA-N 0.000 claims description 9
- 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 claims description 9
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 8
- IQUPABOKLQSFBK-UHFFFAOYSA-N 2-nitrophenol Chemical compound OC1=CC=CC=C1[N+]([O-])=O IQUPABOKLQSFBK-UHFFFAOYSA-N 0.000 claims description 7
- 229910019142 PO4 Inorganic materials 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 7
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 7
- 239000010452 phosphate Substances 0.000 claims description 7
- AZQWKYJCGOJGHM-UHFFFAOYSA-N 1,4-benzoquinone Chemical compound O=C1C=CC(=O)C=C1 AZQWKYJCGOJGHM-UHFFFAOYSA-N 0.000 claims description 6
- GHMLBKRAJCXXBS-UHFFFAOYSA-N resorcinol Chemical compound OC1=CC=CC(O)=C1 GHMLBKRAJCXXBS-UHFFFAOYSA-N 0.000 claims description 6
- 239000002516 radical scavenger Substances 0.000 claims description 4
- BTJIUGUIPKRLHP-UHFFFAOYSA-N 4-nitrophenol Chemical compound OC1=CC=C([N+]([O-])=O)C=C1 BTJIUGUIPKRLHP-UHFFFAOYSA-N 0.000 claims description 3
- LQNUZADURLCDLV-UHFFFAOYSA-N nitrobenzene Chemical compound [O-][N+](=O)C1=CC=CC=C1 LQNUZADURLCDLV-UHFFFAOYSA-N 0.000 claims description 3
- 150000002431 hydrogen Chemical class 0.000 claims 1
- 238000012360 testing method Methods 0.000 abstract description 12
- 230000015556 catabolic process Effects 0.000 abstract description 7
- 238000010294 electrolyte impregnation Methods 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 19
- 230000036039 immunity Effects 0.000 description 8
- 239000003795 chemical substances by application Substances 0.000 description 7
- 230000003321 amplification Effects 0.000 description 6
- 238000003199 nucleic acid amplification method Methods 0.000 description 6
- 239000001384 succinic acid Substances 0.000 description 6
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- 239000004615 ingredient Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000008030 elimination Effects 0.000 description 2
- 238000003379 elimination reaction Methods 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 230000036632 reaction speed Effects 0.000 description 2
- 230000002195 synergetic effect Effects 0.000 description 2
- 230000001052 transient effect Effects 0.000 description 2
- 235000015895 biscuits Nutrition 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
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006356 dehydrogenation reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 238000009863 impact test Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 230000009466 transformation Effects 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
- H01G9/0029—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
- H01G9/022—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
- H01G9/15—Solid electrolytic capacitors
- H01G9/151—Solid electrolytic capacitors with wound foil electrodes
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Manufacturing & Machinery (AREA)
- Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
Abstract
The invention discloses an aluminum electrolytic capacitor for a gallium nitride charger and a preparation method thereof. The preparation method comprises the following steps: (1) plain winding: interposing electrolytic paper between the anode foil and the cathode foil, and winding the electrolytic paper into a prime; (2) electrolyte impregnation: immersing the element in the step (1) into electrolyte for impregnation treatment, wherein the electrolyte comprises the following components in percentage by weight: 45-60% of solvent, 30-50% of solute and 5-10% of additive; wherein the solute comprises the following components in percentage by weight: 30-48% of long carbon chain carboxylic acid ammonium salt, 10-38% of succinic acid, 20-28% of sebacic acid, 10-12% of adipic acid, 1.2-2% of triethylamine salt and 0.8-5% of polyglycerol; (3) sealing and assembling; and (4) an aging step. The gallium nitride miniaturized high-voltage aluminum electrolytic capacitor has a small volume, and the problem of breakdown caused by unstable flash voltage of electrolyte is solved no matter in the aging and durability test processes of the capacitor.
Description
Technical Field
The invention relates to the technical field of capacitors, in particular to an aluminum electrolytic capacitor for a gallium nitride charger and a preparation method thereof.
Background
With the rapid development of 5G, all associated devices using USB pose new challenges for endurance. Gallium nitride meets USB PD, promotes the popularization of light, thin and small chargers, and becomes a new opportunity growth point in the power supply field. Meanwhile, the requirements for large capacity and miniaturization of the essential input end high-voltage filter liquid aluminum electrolytic capacitor are continuously increased, and new opportunities and challenges are met.
In recent years, the development of chargers has been fast, the maximum charging rate has broken through 100W, but the volume and the weight of the charger are continuously increased while the charging speed is improved, so that the maximum charging rate is a primary factor for limiting the development of the charger. Since the rapid filling of gallium nitride, the volume of the charger is continuously reduced, and the charger is reduced into a biscuit or a small block shape from a long strip or a large block in the past, so that the power is improved and the charger is more convenient to carry. The volume of the charger is reduced, so that the magnetic element volume of the charger can be reduced besides the advantages of high frequency and low power consumption of the gallium nitride device, and the volume of the capacitor device is reduced, so that the charger is necessarily designed towards miniaturization.
The Chinese patent of the invention discloses a processing technology of a high-voltage electrolytic capacitor for a gallium nitride charger, which is characterized in that: the method comprises the following steps: the method comprises the following steps: cutting the electrolytic paper, the positive electrode foil and the negative electrode foil; step two: nailing and winding, namely riveting a positive guide pin on the cut positive foil, riveting a negative guide pin on the cut negative foil, and then overlapping and winding the positive foil, the electrolyte paper layer, the negative foil and the electrolyte paper layer from inside to outside in sequence to form a capacitor core, wherein the electrolyte paper layer comprises two layers of overlapped electrolyte paper, and the total thickness of the two overlapped electrolyte papers is 28-35 mu m; step three: impregnating, namely putting the capacitor core into electrolyte to be fully impregnated; step four: assembling, namely penetrating the capacitor core soaked with the electrolyte into colloidal particles and then sealing the capacitor core in an aluminum shell to obtain a bare capacitor; step five: sleeving a sleeve pipe with a corresponding mark on the bare capacitor to obtain a primary capacitor finished product; step six: aging, namely pressurizing the primary capacitor finished product to 1.05-1.15 times of rated voltage, and then aging at high temperature and constant voltage to obtain a secondary capacitor finished product; step seven: and sorting, namely performing electrical performance detection and appearance detection on the finished products in the capacitor, and removing the finished products in the capacitor with the electrical performance and appearance not meeting the standards to obtain the finished capacitor.
However, in the design of the aluminum electrolytic capacitor for gallium nitride, the electrolyte with a temperature resistance of 105 ℃ or 115 ℃ is adopted, the lightning surge resistance of the aluminum electrolytic capacitor is general, and when the aluminum electrolytic capacitor bears instantaneous high-voltage impact, the instantaneous high-voltage impact cannot bear the instantaneous high-voltage impact, the aluminum electrolytic capacitor is easily subjected to overvoltage due to the instantaneous high-voltage impact, so that the aluminum electrolytic capacitor is subjected to breakdown phenomenon, a power supply part fails, an electronic product or equipment cannot work, mainly, the inside of the capacitor generates heat, chemical components in the electrolyte are easily gasified at high temperature, gas is generated to cause swelling, the electrolyte leaks, and the service life of the capacitor fails too early. In order to improve high-voltage impact resistance, a sparking voltage improver is mainly added in the industry, but the problem of instability or breakdown exists after the sparking voltage improver is added into electrolyte.
Disclosure of Invention
In order to make up for the defects of the prior art, the invention provides an aluminum electrolytic capacitor for a gallium nitride charger and a preparation method thereof.
The technical problem to be solved by the invention is realized by the following technical scheme:
a preparation method of an aluminum electrolytic capacitor for a gallium nitride charger comprises the following steps:
(1) And (3) winding the element: interposing electrolytic paper between the anode foil and the cathode foil, and winding the electrolytic paper into a prime;
(2) Impregnation with electrolyte: immersing the element in the step (1) into electrolyte for impregnation treatment, wherein the electrolyte comprises the following components in percentage by weight: 45-60% of solvent, 30-50% of solute and 5-10% of additive; wherein the solute comprises the following components in percentage by weight: 30-48% of long carbon chain carboxylic acid ammonium salt, 10-38% of succinic acid, 20-28% of sebacic acid, 10-12% of adipic acid, 1.2-2% of triethylamine salt and 0.8-5% of polyglycerol;
(3) Sealing and assembling: putting the elements in the step (2) into a shell, and sealing and assembling;
(4) And (5) aging.
As a preferred embodiment of the method for preparing the aluminum electrolytic capacitor for the gallium nitride charger provided by the invention, the solvent consists of the following components in percentage by weight: 30 to 45 percent of ethylene glycol, 25 to 40 percent of diethylene glycol, 5 to 25 percent of phosphate, 5 to 10 percent of nitrophenol and 1.5 to 3.5 percent of citric acid.
As a preferred embodiment of the method for preparing the aluminum electrolytic capacitor for the gallium nitride charger provided by the invention, the additive comprises the following components in percentage by weight: 40 to 60 percent of mannitol, 25 to 45 percent of phosphorous acid, 10 to 15 percent of boric acid, 2 to 6 percent of ammonium butenedioate, 1 to 5 percent of hypophosphorous acid, 0.8 to 1.5 percent of dehydrogenating agent and 0.2 to 0.8 percent of silicotungstic acid.
As a preferred embodiment of the method for preparing the aluminum electrolytic capacitor for the gallium nitride charger provided by the invention, the hydrogen scavenger is one or more of p-nitrophenol, p-benzoquinone, p-nitrobenzol and resorcinol.
As a preferable embodiment of the method for manufacturing the aluminum electrolytic capacitor for the gallium nitride charger, the electrolytic paper has a thickness of 40 μm or more and a density of 0.90g/cm 3 The above electrolytic paper.
As a preferred embodiment of the method for manufacturing the aluminum electrolytic capacitor for the gallium nitride charger according to the present invention, the element is baked before the step (2).
In a preferred embodiment of the method for manufacturing an aluminum electrolytic capacitor for a gallium nitride charger according to the present invention, the aluminum electrolytic capacitor has a diameter of 10mm or less.
An aluminum electrolytic capacitor for a gallium nitride charger is prepared by the preparation method.
A working electrolyte for an aluminum electrolytic capacitor for a gallium nitride charger comprises the following components in percentage by weight: 45-60% of solvent, 30-50% of solute and 5-10% of additive; wherein,
the solute comprises the following components in percentage by weight: 30-48% of long carbon chain carboxylic acid ammonium salt, 10-38% of succinic acid, 20-28% of sebacic acid, 10-12% of adipic acid, 1.2-2% of triethylamine salt and 0.8-5% of polyglycerol;
the solvent comprises the following components in percentage by weight: 30 to 45 percent of ethylene glycol, 25 to 40 percent of diethylene glycol, 5 to 25 percent of phosphate, 5 to 10 percent of nitrophenol and 1.5 to 3.5 percent of citric acid;
the additive comprises the following components in percentage by weight: 40 to 60 percent of mannitol, 25 to 45 percent of phosphorous acid, 10 to 15 percent of boric acid, 2 to 6 percent of ammonium butenedioate, 1 to 5 percent of hypophosphorous acid, 0.8 to 1.5 percent of dehydrogenating agent and 0.2 to 0.8 percent of silicotungstic acid.
The invention has the following beneficial effects:
the invention provides a gallium nitride miniaturized high-voltage aluminum electrolytic capacitor, which particularly selects polyglycerol, silicotungstic acid and succinic acid which are mutually synergistic, is used for a miniaturized aluminum electrolytic capacitor (the diameter is less than 10 mm), not only can reduce the leakage current of the capacitor, but also is beneficial to ensuring the capability of a quick charger product for resisting transient overvoltage. The aluminum electrolytic capacitor has small volume, and has no problem of breakdown caused by unstable sparking voltage of the electrolyte in the aging and durability test processes of the capacitor, thereby solving the problem of insufficient breakdown resistance and pressure resistance when the aluminum electrolytic capacitor for the existing gallium nitride charger is produced according to the small-size specification.
Specifically, the polyglycerol is added into the solute, the solute can be dispersed in water and glycol, the surface performance is stable, the resistivity is 450 omega cm at 28 ℃, and the sparking voltage is as high as 520V; the additive is added with silicotungstic acid, which has strong oxidizing property, so that the damage of an oxide film on the surface of an anode foil can be effectively repaired, the increase of leakage current of an aluminum electrolytic capacitor is inhibited, the leakage current of the capacitor is reduced, the capacitor is ensured not to be short-circuited due to breakdown of electrolytic paper caused by flash of electrolyte under the condition of overvoltage, and the capability of ensuring the instantaneous overvoltage resistance of a quick charger product is facilitated; according to the invention, the solute concentration is properly increased, anode corrosion can be effectively inhibited, the service life of the capacitor is prolonged, but the ionic conductivity is usually lower than that of a corresponding conventional electrolyte, the multiplying power performance of the capacitor is influenced, and the ionic conductivity is not lower than that of the conventional electrolyte and is higher than 0.2S/m by adding succinic acid.
Detailed Description
The raw materials and equipment used in the invention are common raw materials and equipment in the field if not specified; the methods used in the present invention are conventional in the art unless otherwise specified.
Unless otherwise defined, terms used in the present specification have the same meaning as those generally understood by those skilled in the art, but in case of conflict, the definitions in the present specification shall control.
The use of "including," "comprising," "containing," "having," or other variations thereof herein, is meant to encompass non-exclusive inclusions, as well as non-exclusive distinctions between such terms. The term "comprising" means that other steps and ingredients can be added that do not affect the end result. The term "comprising" also includes the terms "consisting of …" and "consisting essentially of …". The compositions and methods/processes of the present invention comprise, consist of, and consist essentially of the essential elements and limitations of the invention described herein, as well as any of the additional or optional ingredients, components, steps, or limitations described herein.
All numbers or expressions referring to quantities of ingredients, process conditions, etc. used in the specification and claims are to be understood as modified in all instances by the term "about". All ranges directed to the same component or property are inclusive of the endpoints, and independently combinable. Because these ranges are continuous, they include every value between the minimum and maximum values. It should also be understood that any numerical range recited herein is intended to include all sub-ranges within that range.
The present invention will be described in detail with reference to examples, which are only preferred embodiments of the present invention and are not intended to limit the present invention.
Example 1
A preparation method of an aluminum electrolytic capacitor for a gallium nitride charger comprises the following steps:
(1) And (3) winding the element: interposing electrolytic paper between the anode foil and the cathode foil, and winding the electrolytic paper into a prime;
(2) Impregnation with electrolyte: baking the element obtained in the step (1) before immersing in the electrolyte, and then immersing in the electrolyte for impregnation treatment, wherein the electrolyte comprises the following components in percentage by weight: 52% of solvent, 40% of solute and 8% of additive; wherein,
the solvent comprises the following components in percentage by weight: 38% of ethylene glycol, 30% of diethylene glycol, 25% of phosphate, 5% of nitrophenol and 2% of citric acid;
the solute comprises the following components in percentage by weight: 36% of long-carbon-chain carboxylic acid ammonium salt, 20% of succinic acid, 25% of sebacic acid, 12% of adipic acid, 2% of triethylamine salt and 5% of polyglycerol;
the additive comprises the following components in percentage by weight: 45% of mannitol, 30% of phosphorous acid, 15% of boric acid, 6% of ammonium butenedioate, 2.8% of hypophosphorous acid, 1% of a dehydrogenating agent and 0.2% of silicotungstic acid;
(3) Sealing and assembling: putting the elements in the step (2) into a shell, and sealing and assembling;
(4) And an aging step, obtaining the aluminum electrolytic capacitor with the specification of 22 muF/400V, the diameter of 8mm and the height of 16 mm.
Example 2
A preparation method of an aluminum electrolytic capacitor for a gallium nitride charger comprises the following steps:
(1) And (3) plain winding: interposing electrolytic paper between the anode foil and the cathode foil, and winding the electrolytic paper into a prime;
(2) Impregnation with electrolyte: baking the element in the step (1) before immersing in electrolyte, and then carrying out impregnation treatment, wherein the electrolyte comprises the following components in percentage by weight: 45% of solvent, 50% of solute and 5% of additive; wherein,
the solvent consists of the following components in percentage by weight: 45% of ethylene glycol, 25% of diethylene glycol, 16.5% of phosphate, 10% of nitrophenol and 3.5% of citric acid;
the solute comprises the following components in percentage by weight: 30% of long-carbon-chain carboxylic acid ammonium salt, 38% of succinic acid, 20% of sebacic acid, 10.2% of adipic acid, 1% of triethylamine salt and 0.8% of polyglycerol;
the additive comprises the following components in percentage by weight: 60% of mannitol, 25% of phosphorous acid, 10% of boric acid, 2% of ammonium butenedioate, 1.4% of hypophosphorous acid, 0.8% of a hydrogen elimination agent and 0.8% of silicotungstic acid;
(3) Sealing and assembling: putting the elements in the step (2) into a shell, and sealing and assembling;
(4) And an aging step, obtaining the aluminum electrolytic capacitor with the specification of 27 muF/400V, the diameter of 8mm and the height of 20 mm.
Example 3
A preparation method of an aluminum electrolytic capacitor for a gallium nitride charger comprises the following steps:
(1) And (3) plain winding: interposing electrolytic paper between the anode foil and the cathode foil, and winding the electrolytic paper into an element;
(2) Impregnation with electrolyte: baking the element in the step (1) before immersing in electrolyte, and then carrying out impregnation treatment, wherein the electrolyte comprises the following components in percentage by weight: 60% of solvent, 30% of solute and 10% of additive; wherein,
the solvent comprises the following components in percentage by weight: 30% of ethylene glycol, 40% of diethylene glycol, 23.5% of phosphate, 5% of nitrophenol and 1.5% of citric acid;
the solute comprises the following components in percentage by weight: 48% of long-carbon-chain carboxylic acid ammonium salt, 10% of succinic acid, 28% of sebacic acid, 10% of adipic acid, 1.2% of triethylamine salt and 2.8% of polyglycerol;
the additive comprises the following components in percentage by weight: 40% of mannitol, 45% of phosphorous acid, 10% of boric acid, 2% of ammonium butenedioate, 1% of hypophosphorous acid, 1.5% of a hydrogen elimination agent and 0.5% of silicotungstic acid;
(3) Sealing and assembling: putting the elements in the step (2) into a shell, and sealing and assembling;
(4) And an aging step, obtaining the aluminum electrolytic capacitor with the specification of 15 muF/400V, the diameter of 7mm and the height of 18 mm.
Comparative example 1
The preparation method of comparative example 1 is substantially the same as that of example 1 except that: the solute comprises the following components in percentage by weight: 36% of long-carbon-chain carboxylic acid ammonium salt, 20% of succinic acid, 25% of sebacic acid, 17% of adipic acid and 2% of triethylamine salt.
Comparative example 2
The preparation method of comparative example 2 is substantially the same as that of example 1 except that: the solute comprises the following components in percentage by weight: 36% of long-carbon-chain carboxylic acid ammonium salt, 20% of succinic acid, 22% of sebacic acid, 10% of adipic acid, 2% of triethylamine salt and 10% of polyglycerol.
Comparative example 3
The preparation method of comparative example 3 is substantially the same as that of example 1 except that: the additive comprises the following components in percentage by weight: 45% of mannitol, 30% of phosphorous acid, 15% of boric acid, 6% of ammonium butenedioate, 3% of hypophosphorous acid and 1% of a dehydrogenation agent.
Comparative example 4
The preparation method of comparative example 4 is substantially the same as that of example 1 except that: the additive comprises the following components in percentage by weight: 45% of mannitol, 30% of phosphorous acid, 15% of boric acid, 6% of ammonium butenedioate, 1% of hypophosphorous acid, 1% of a dehydrogenating agent and 2% of silicotungstic acid.
Comparative example 5
The preparation method of comparative example 5 is substantially the same as that of example 1 except that: the solute comprises the following components in percentage by weight: 48% of long-carbon-chain carboxylic acid ammonium salt, 30% of sebacic acid, 15% of adipic acid, 2% of triethylamine salt and 5% of polyglycerol.
Comparative example 6
The preparation method of comparative example 6 is substantially the same as that of example 1 except that: the solute comprises the following components in percentage by weight: 48% of long-carbon-chain carboxylic acid ammonium salt, 32% of sebacic acid, 15% of adipic acid and 5% of triethylamine salt.
The capacitors obtained in examples 1 to 3 and comparative examples 1 to 6 were subjected to an electrical property test and a transient high voltage impact test (also referred to as a surge (surge) immunity test, surge voltage: 2.0 KV), and the results were as follows:
conditions of the surge (surge) immunity test: polarity: + -, voltage: 2.0KV, coupling mode: L-N, phase: automatic, interval: 60S, times: the NTC 10D-9, the electrical performance of the capacitor tested 16H was placed after the test was finished.
As can be seen from the above table, the electrolyte in comparative example 1 had no polyglycerol added to the solute; the solute is not easy to disperse in water and glycol, the surface performance is difficult to stabilize, the flash fire voltage is reduced, the LC amplification is large after a surge (impact) immunity test, and the appearance of the product is slightly bulged.
In comparative example 2, a large amount of polyglycerol was added to the solute of the electrolyte; although the sparking voltage is increased, it increases the equivalent resistance and also increases the loss of the capacitor; LC amplification is large after surge (impact) immunity test; and the appearance of the product is slightly bulged.
Additive of electrolyte in comparative example 3 without adding silicotungstic acid; the damage of an oxide film on the surface of the anode foil cannot be effectively repaired, the leakage current of the aluminum electrolytic capacitor cannot be inhibited, the leakage current is increased, and the LC amplification is large after a surge (impact) immunity test; and the appearance of the product is slightly bulged.
In the comparative example 4, a large amount of silicotungstic acid was added to the additive of the electrolyte; although the damage of an oxide film on the surface of the anode foil can be effectively repaired, the increase of leakage current is inhibited, hydrogen is easy to produce from the reduced silicotungstic acid, hydrogen is inevitably separated out at a cathode, and a bottom drum and a rubber cover drum with obvious product appearance after a surge (impact) immunity test are produced; and LC amplification is also large.
In comparative example 5, succinic acid was not added to the solute of the electrolyte; the ionic conductivity is low, the chemical reaction speed cannot be guaranteed, so that the flashover voltage is influenced, and the LC amplification is large after a surge (impact) immunity test; and the appearance of the product is slightly bulged.
In comparative example 6, succinic acid and polyglycerol were not added to the solute of the electrolyte; solute is not easy to disperse in water and glycol, the ionic conductivity is low, and the chemical reaction speed cannot be guaranteed, so that the flash voltage is influenced, and the bottom drum with obvious product appearance is obtained after a surge (impact) immunity test; and LC amplification is also large.
The polyglycerol is added into the solute, the polyglycerol can be dispersed in water and glycol, the surface performance is stable, the resistivity of the polyglycerol is 450 omega cm at 28 ℃, and the sparking voltage is 520V; the additive is added with silicotungstic acid, which has strong oxidizing property, so that the damage of an oxide film on the surface of an anode foil can be effectively repaired, the increase of leakage current of an aluminum electrolytic capacitor is inhibited, the leakage current of the capacitor is reduced, the capacitor is ensured not to be short-circuited due to breakdown of electrolytic paper caused by flash of electrolyte under the condition of overvoltage, and the capability of ensuring the instantaneous overvoltage resistance of a quick charger product is facilitated; according to the invention, the solute concentration is properly increased, anode corrosion can be effectively inhibited, the service life of the capacitor is prolonged, but the ionic conductivity is usually lower than that of a corresponding conventional electrolyte, the multiplying power performance of the capacitor is influenced, and the ionic conductivity is not lower than that of the conventional electrolyte and is higher than 0.2S/m by adding succinic acid. Thus, the invention particularly selects the polyglycerol, the silicotungstic acid and the succinic acid which are mutually synergistic, and the diameter of the aluminum electrolytic capacitor is less than 10mm
The leakage current of the capacitor is reduced, and the capability of the quick charger product for resisting instantaneous overvoltage is favorably ensured.
The above-mentioned embodiments only express the embodiments of the present invention, and the description is more specific and detailed, but not understood as the limitation of the patent scope of the present invention, but all the technical solutions obtained by using the equivalent substitution or the equivalent transformation should fall within the protection scope of the present invention.
Claims (8)
1. A preparation method of an aluminum electrolytic capacitor for a gallium nitride charger is characterized by comprising the following steps:
(1) And (3) plain winding: interposing electrolytic paper between the anode foil and the cathode foil, and winding the electrolytic paper into an element;
(2) Impregnation with electrolyte: immersing the element in the step (1) into electrolyte for impregnation treatment, wherein the electrolyte comprises the following components in percentage by weight: 45-60% of solvent, 30-50% of solute and 5-10% of additive; wherein the solute comprises the following components in percentage by weight: 30 to 48 percent of long carbon chain carboxylic acid ammonium salt, 10 to 38 percent of succinic acid, 20 to 28 percent of sebacic acid, 10 to 12 percent of adipic acid, 1.2 to 2 percent of triethylamine salt and 0.8 to 5 percent of polyglycerol;
(3) Sealing and assembling: putting the elements in the step (2) into a shell, and sealing and assembling;
(4) Aging;
the solvent comprises the following components in percentage by weight: 30 to 45 percent of ethylene glycol, 25 to 40 percent of diethylene glycol, 5 to 25 percent of phosphate, 5 to 10 percent of nitrophenol and 1.5 to 3.5 percent of citric acid;
the additive comprises the following components in percentage by weight: 40 to 60 percent of mannitol, 25 to 45 percent of phosphorous acid, 10 to 15 percent of boric acid, 2~6 percent of ammonium butenedioate, 1~5 percent of hypophosphorous acid, 0.8 to 1.5 percent of hydrogen dissipater and 0.2 to 0.8 percent of silicotungstic acid.
2. The method for preparing an aluminum electrolytic capacitor for a gallium nitride charger according to claim 1, wherein the hydrogen scavenger is one or more of p-nitrophenol, p-benzoquinone, p-nitrobenzol and resorcinol.
3. The method for producing an aluminum electrolytic capacitor for a gallium nitride charger according to claim 1, wherein the electrolytic paper is selected from the group consisting of paper having a thickness of 40 μm or more and a density of 0.90g/cm 3 The above electrolytic paper.
4. The method for producing an aluminum electrolytic capacitor for a gallium nitride charger according to claim 1, wherein the element is baked before the step (2).
5. The method for producing an aluminum electrolytic capacitor for a gallium nitride charger according to claim 1, wherein the diameter of the aluminum electrolytic capacitor is 10mm or less.
6. An aluminum electrolytic capacitor for a gallium nitride charger, characterized in that it is produced by the production method according to any one of claims 1 to 5.
7. The working electrolyte for the aluminum electrolytic capacitor is characterized by comprising the following components in percentage by weight: 45-60% of solvent, 30-50% of solute and 5-10% of additive; wherein,
the solute comprises the following components in percentage by weight: 30 to 48 percent of long carbon chain carboxylic acid ammonium salt, 10 to 38 percent of succinic acid, 20 to 28 percent of sebacic acid, 10 to 12 percent of adipic acid, 1.2 to 2 percent of triethylamine salt and 0.8 to 5 percent of polyglycerol;
the solvent comprises the following components in percentage by weight: 30 to 45 percent of ethylene glycol, 25 to 40 percent of diethylene glycol, 5 to 25 percent of phosphate, 5 to 10 percent of nitrophenol and 1.5 to 3.5 percent of citric acid;
the additive comprises the following components in percentage by weight: 40 to 60 percent of mannitol, 25 to 45 percent of phosphorous acid, 10 to 15 percent of boric acid, 2~6 percent of ammonium butenedioate, 1~5 percent of hypophosphorous acid, 0.8 to 1.5 percent of hydrogen scavenger and 0.2 to 0.8 percent of silicotungstic acid.
8. The working electrolyte for aluminum electrolytic capacitors as recited in claim 7 wherein the hydrogen scavenger is one or more of p-nitrophenol, p-benzoquinone, p-nitrobenzol and resorcinol.
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| CN1430233A (en) * | 2001-12-18 | 2003-07-16 | 松下电器产业株式会社 | Aluminium electrolytic capacitor and its making method |
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| CN111653431A (en) * | 2020-06-09 | 2020-09-11 | 肇庆绿宝石电子科技股份有限公司 | Ultralow temperature aluminum electrolytic capacitor and manufacturing method thereof |
| CN112582179A (en) * | 2019-09-30 | 2021-03-30 | 深圳新宙邦科技股份有限公司 | Electrolytic capacitor |
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2021
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| JPH11204380A (en) * | 1998-01-14 | 1999-07-30 | Elna Co Ltd | Electrolytic capacitor |
| CN1430233A (en) * | 2001-12-18 | 2003-07-16 | 松下电器产业株式会社 | Aluminium electrolytic capacitor and its making method |
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| CN110690051A (en) * | 2019-09-25 | 2020-01-14 | 富之庆电子（深圳）有限公司 | 6KV lightning stroke resistant safety aluminum electrolytic capacitor and preparation method thereof |
| CN112582179A (en) * | 2019-09-30 | 2021-03-30 | 深圳新宙邦科技股份有限公司 | Electrolytic capacitor |
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