CN110828184B - Formation method of solid aluminum capacitor - Google Patents
Formation method of solid aluminum capacitor Download PDFInfo
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- CN110828184B CN110828184B CN201911169875.3A CN201911169875A CN110828184B CN 110828184 B CN110828184 B CN 110828184B CN 201911169875 A CN201911169875 A CN 201911169875A CN 110828184 B CN110828184 B CN 110828184B
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- 230000015572 biosynthetic process Effects 0.000 title claims abstract description 72
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 21
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 21
- 239000003990 capacitor Substances 0.000 title claims abstract description 19
- 238000000034 method Methods 0.000 title claims abstract description 18
- 239000007787 solid Substances 0.000 title claims abstract description 13
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims abstract description 51
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims abstract description 26
- 239000011888 foil Substances 0.000 claims abstract description 24
- 238000010438 heat treatment Methods 0.000 claims abstract description 17
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims abstract description 13
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000004327 boric acid Substances 0.000 claims abstract description 10
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 8
- FLDCSPABIQBYKP-UHFFFAOYSA-N 5-chloro-1,2-dimethylbenzimidazole Chemical compound ClC1=CC=C2N(C)C(C)=NC2=C1 FLDCSPABIQBYKP-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000001741 Ammonium adipate Substances 0.000 claims abstract description 7
- 235000019293 ammonium adipate Nutrition 0.000 claims abstract description 7
- OTRAYOBSWCVTIN-UHFFFAOYSA-N OB(O)O.OB(O)O.OB(O)O.OB(O)O.OB(O)O.N.N.N.N.N.N.N.N.N.N.N.N.N.N.N Chemical compound OB(O)O.OB(O)O.OB(O)O.OB(O)O.OB(O)O.N.N.N.N.N.N.N.N.N.N.N.N.N.N.N OTRAYOBSWCVTIN-UHFFFAOYSA-N 0.000 claims abstract description 5
- 229910052742 iron Inorganic materials 0.000 claims abstract description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 4
- 239000010935 stainless steel Substances 0.000 claims abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 4
- 239000011259 mixed solution Substances 0.000 claims description 15
- 238000004140 cleaning Methods 0.000 claims description 9
- 150000001412 amines Chemical class 0.000 claims description 4
- 239000000243 solution Substances 0.000 claims description 4
- 238000003466 welding Methods 0.000 abstract description 3
- 238000004804 winding Methods 0.000 abstract description 3
- 230000036571 hydration Effects 0.000 description 3
- 238000006703 hydration reaction Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000126 substance Substances 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
- H01G9/04—Electrodes or formation of dielectric layers thereon
- H01G9/048—Electrodes or formation of dielectric layers thereon characterised by their structure
- H01G9/055—Etched foil electrodes
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
Abstract
The invention discloses a formation method of a solid aluminum capacitor. The method comprises the steps of nailing guide pins on an anode aluminum foil and a negative foil, separating the anode aluminum foil and the negative foil by electrolytic paper, winding the anode aluminum foil and the negative foil into a capacitor core, welding the core on a stainless steel iron strip, treating the core in pure water at 90-100 ℃, and forming by adopting a six-stage formation process, wherein each stage of formation is subjected to high-temperature heat treatment. The first two stages are formed by mixing ammonium adipate, citric acid and phosphoric acid, and the third four five six stages are formed by mixing boric acid, ammonium pentaborate and citric acid. And after the sixth-level formation, the solid capacitor is formed through high-temperature heat treatment and then is formed, and the middle part of the solid capacitor is treated by a phosphoric acid solution, so that the solid capacitor with high specific volume, small leakage current and stable performance is prepared.
Description
Technical Field
The invention belongs to the technical field of aluminum electrolytic capacitor formation, and particularly relates to a six-stage formation method of a solid aluminum capacitor.
Background
At present, the formation technology of the anode foil is mainly used for carrying out formation research on the aluminum foil after electrolytic corrosion. However, the formed anode foil is damaged to different degrees in each process such as cutting, stapling, welding, and the like, and unlike the liquid aluminum capacitor, the solid aluminum capacitor has no self-healing property, and therefore, it is necessary to form the anode foil after the core is welded, and repair the damaged oxide film. At present, each chemical technology has advantages and disadvantages, such as small capacity, large electric leakage, poor hydration resistance and the like. Therefore, there is a need for a method for forming a solid aluminum capacitor having a large capacity, a small leakage current, and a high hydration resistance.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a six-stage forming method of a solid aluminum capacitor after core winding, which comprises the following specific steps:
the method comprises the following steps of nailing and connecting guide pins on an anode aluminum foil and a negative foil, separating the anode aluminum foil and the negative foil by using electrolytic paper, winding the anode aluminum foil and the negative foil into a capacitor core, welding the core on a stainless steel iron strip, treating the core in pure water at 90-100 ℃, and forming by adopting a six-level formation process, wherein the method specifically comprises the following formation process steps:
(1) placing the core into a mixed solution of 1-10% of ammonium adipate, 0.2% of citric acid and 0.1-1% of phosphoric acid, forming the voltage to be 50-100V, forming the temperature to be 50-80 ℃, forming the time to be 4-8 minutes, and then carrying out heat treatment at the high temperature of 200-230 ℃ for 2-4 minutes;
(2) performing two-stage formation on the core after the high-temperature treatment in a mixed solution of 1-10% ammonium adipate, 0.2% citric acid and 0.1-1% phosphoric acid at the formation temperature of 50-80 ℃ for 4-8 minutes at the formation voltage of 150V, and then performing heat treatment at the high temperature of 200-230 ℃ for 2-4 minutes;
(3) respectively carrying out three-stage, four-stage, five-stage and six-stage formation on the core after the high-temperature treatment in a mixed solution of 5-10% boric acid, 2-15% ammonium pentaborate and 0.2% citric acid, wherein the formation voltages are respectively 150-250V, 250-350V, 350-450V and 450-550V, the formation temperature is 50-80 ℃, the formation time is 4-8 minutes, cleaning is carried out after each stage formation, and then heat treatment is carried out for 2-4 minutes at the high temperature of 200-230 ℃;
(4) carrying out six-stage secondary formation on the six-stage formed core after the high-temperature treatment in a mixed solution of 5-10% of boric acid, 2-15% of amine pentaborate and 0.2% of citric acid, wherein the formation voltage is 550V, the formation temperature is 50-80 ℃, and the formation time is 4-8 minutes;
(5) cleaning the core after the secondary formation of the six grades, and treating by using 1-4% phosphoric acid solution;
(6) cleaning the solution treated by the phosphoric acid, and carrying out heat treatment at the high temperature of 200-230 ℃ for 2-4 minutes;
(7) the core subjected to high-temperature heat treatment is subjected to six-stage three-time formation in a mixed solution of 5-10% of boric acid, 2-15% of amine pentaborate and 0.2% of citric acid, the formation voltage is 450-80V, the formation temperature is 50-80 ℃, and the formation time is 4-8 minutes.
Compared with the prior art, the invention has the beneficial effects that: the invention carries out six-stage formation on the wound core, can greatly improve the specific volume of the anode foil, improve the hydration resistance and reduce the leakage current, and can prepare the solid aluminum capacitor with stable performance.
Detailed Description
The present invention will be described in detail with reference to specific examples.
Examples
The method comprises the following steps of (1) nailing a guide pin on an anode aluminum foil and a negative foil, wherein the withstand voltage of a positive foil is 536V, the positive foil is separated by high-density electrolytic paper, the positive foil is wound into a capacitor core, the core is welded on a stainless steel iron strip, the core is put into pure water at 90-100 ℃ for treatment, then is put into a mixed solution of 5% of ammonium adipate, 0.2% of citric acid and 0.1% of phosphoric acid, the formation voltage is 50-100V, the formation temperature is 80 ℃, the formation time is 4 minutes, and then the core is taken out and is subjected to heat treatment at the high temperature of 200 ℃ for 4 minutes; performing secondary formation on the core after high-temperature treatment in a mixed solution of 5% ammonium adipate, 0.2% citric acid and 0.1% phosphoric acid at the formation voltage of 100-150V at the formation temperature of 80 ℃ for 4 minutes, and then performing heat treatment at the high temperature of 200 ℃ for 4 minutes; respectively carrying out three-stage, four-stage, five-stage and six-stage formation on the core after high-temperature treatment in a mixed solution of 5% boric acid, 2% pentaborate and 0.2% citric acid, wherein the formation voltages are respectively 150-250V, 250-350V, 350-450V and 450-550V, the formation temperature is 80 ℃, the formation time is 4 minutes, cleaning is carried out after each stage formation, and then heat treatment is carried out for 4 minutes at the high temperature of 200-230 ℃; performing secondary formation on the six-level formed core after high-temperature treatment in a mixed solution of 5% boric acid, 2% ammonium pentaborate and 0.2% citric acid, wherein the formation voltage is 450-550V, the formation temperature is 80 ℃, and the formation time is 4 minutes; cleaning the core after the secondary formation of the six grades, and treating by using a 1% phosphoric acid solution; then cleaning, and carrying out heat treatment at the high temperature of 200-230 ℃ for 4 minutes; and finally, carrying out six-stage three-time formation on the core subjected to high-temperature heat treatment in a mixed solution of 5% boric acid, 2% ammonium pentaborate and 0.2% citric acid, wherein the formation voltage is 450-550V, the formation temperature is 80 ℃, and the formation time is 4 minutes.
Product performance detection
By adopting the formation method of the embodiment, a batch of solid aluminum capacitors with low leakage and stable performance are prepared, and 10 samples are taken to obtain the following data:
| model number | Average CAP (uF) | Average DF | Average ESR (m omega) | Average LC (uA) |
| 8×16(300V6.8uF) | 7.3 | 1.3 | 212.4 | 0.2 |
It should be noted that the present invention is not limited to the above-mentioned embodiments, and other changes and modifications can be made by those skilled in the art according to the spirit of the present invention, and these changes and modifications made according to the spirit of the present invention should be included in the scope of the present invention as claimed.
Claims (1)
1. A method for forming a solid aluminum capacitor is characterized in that a guide pin is nailed on an anode aluminum foil and a negative foil, and is separated by electrolytic paper to be wound into a capacitor core, then the core is welded on a stainless steel iron strip, the core is put into pure water with the temperature of 90-100 ℃ for treatment, and the formation is carried out by adopting a six-level formation process, which specifically comprises the following formation process steps:
(1) placing the core into a mixed solution of 1-10% by mass of ammonium adipate, 0.2% by mass of citric acid and 0.1-1% by mass of phosphoric acid, forming the core into a voltage of 50-100V, forming the core into a temperature of 50-80 ℃ for 4-8 minutes, and then carrying out heat treatment at the high temperature of 200-230 ℃ for 2-4 minutes;
(2) performing two-stage formation on the core after the high-temperature treatment in a mixed solution of 1-10% by mass of ammonium adipate, 0.2% by mass of citric acid and 0.1-1% by mass of phosphoric acid, wherein the formation voltage is 150V, the formation temperature is 50-80 ℃, the formation time is 4-8 minutes, and then performing heat treatment for 2-4 minutes at the high temperature of 200-230 ℃;
(3) respectively carrying out three-stage, four-stage, five-stage and six-stage formation on the core after the high-temperature treatment in a mixed solution of 5-10% boric acid, 2-15% ammonium pentaborate and 0.2% citric acid, wherein the formation voltages are respectively 150-250V, 250-350V, 350-450V and 450-550V, the formation temperature is 50-80 ℃, the formation time is 4-8 minutes, cleaning is carried out after each stage formation, and then heat treatment is carried out for 2-4 minutes at the high temperature of 200-230 ℃;
(4) carrying out six-stage secondary formation on the six-stage formed core after the high-temperature treatment in a mixed solution of 5-10% of boric acid, 2-15% of amine pentaborate and 0.2% of citric acid by mass, wherein the formation voltage is 450-550V, the formation temperature is 50-80 ℃, and the formation time is 4-8 minutes;
(5) cleaning the core after the secondary formation of the six grades, and treating by using 1-4% phosphoric acid solution;
(6) cleaning the core treated by the phosphoric acid, and carrying out heat treatment at the high temperature of 200-230 ℃ for 2-4 minutes;
(7) the core subjected to high-temperature heat treatment is subjected to six-stage three-time formation in a mixed solution of 5-10% of boric acid, 2-15% of amine pentaborate and 0.2% of citric acid, the formation voltage is 450-80V, the formation temperature is 50-80 ℃, and the formation time is 4-8 minutes.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911169875.3A CN110828184B (en) | 2019-11-26 | 2019-11-26 | Formation method of solid aluminum capacitor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911169875.3A CN110828184B (en) | 2019-11-26 | 2019-11-26 | Formation method of solid aluminum capacitor |
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| Publication Number | Publication Date |
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| CN110828184A CN110828184A (en) | 2020-02-21 |
| CN110828184B true CN110828184B (en) | 2022-05-10 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111710528B (en) * | 2020-06-22 | 2021-10-22 | 广西大学 | Preparation method of low-voltage formed foil in composite dielectric film |
| CN112133563B (en) * | 2020-09-29 | 2021-08-03 | 新疆众和股份有限公司 | Six-stage formation process of high-capacity low-leakage medium-voltage anode foil |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102610390A (en) * | 2011-01-20 | 2012-07-25 | 严民 | Method for forming ultrahigh-voltage anode foil for aluminum electrolytic capacitors |
| CN103187181A (en) * | 2013-03-25 | 2013-07-03 | 荥经县旭光电子有限公司 | Six-level forming method of medium and high voltage aluminum electrolytic capacitor anode foil |
| CN103243369A (en) * | 2013-04-10 | 2013-08-14 | 宜都东阳光化成箔有限公司 | Formation technique of medium/high-voltage anode aluminum foil for enhancing aluminum electrolytic capacitance |
| CN104499030A (en) * | 2014-12-26 | 2015-04-08 | 四川日科电子有限公司 | Forming agent with capability of shortening hydration time, water-resistance formed foil and forming method of water-resistance formed foil |
| CN104499029A (en) * | 2014-12-26 | 2015-04-08 | 四川日科电子有限公司 | High-conversion-rate formed liquid, formed foil and forming method thereof |
-
2019
- 2019-11-26 CN CN201911169875.3A patent/CN110828184B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102610390A (en) * | 2011-01-20 | 2012-07-25 | 严民 | Method for forming ultrahigh-voltage anode foil for aluminum electrolytic capacitors |
| CN103187181A (en) * | 2013-03-25 | 2013-07-03 | 荥经县旭光电子有限公司 | Six-level forming method of medium and high voltage aluminum electrolytic capacitor anode foil |
| CN103243369A (en) * | 2013-04-10 | 2013-08-14 | 宜都东阳光化成箔有限公司 | Formation technique of medium/high-voltage anode aluminum foil for enhancing aluminum electrolytic capacitance |
| CN104499030A (en) * | 2014-12-26 | 2015-04-08 | 四川日科电子有限公司 | Forming agent with capability of shortening hydration time, water-resistance formed foil and forming method of water-resistance formed foil |
| CN104499029A (en) * | 2014-12-26 | 2015-04-08 | 四川日科电子有限公司 | High-conversion-rate formed liquid, formed foil and forming method thereof |
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| CN110828184A (en) | 2020-02-21 |
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