CN1971787A - Method for Coating Aluminum Shell of Electrolytic Capacitor with Insulating Film Using Anode Treatment Process - Google Patents
Method for Coating Aluminum Shell of Electrolytic Capacitor with Insulating Film Using Anode Treatment Process Download PDFInfo
- Publication number
- CN1971787A CN1971787A CNA2005101240395A CN200510124039A CN1971787A CN 1971787 A CN1971787 A CN 1971787A CN A2005101240395 A CNA2005101240395 A CN A2005101240395A CN 200510124039 A CN200510124039 A CN 200510124039A CN 1971787 A CN1971787 A CN 1971787A
- Authority
- CN
- China
- Prior art keywords
- aluminum
- aluminum shell
- electrolytic capacitor
- sulfuric acid
- anode
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 60
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 60
- 239000003990 capacitor Substances 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims abstract description 23
- 239000011248 coating agent Substances 0.000 title claims abstract description 12
- 238000000576 coating method Methods 0.000 title claims abstract description 12
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 36
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 9
- 238000009413 insulation Methods 0.000 claims description 5
- 239000010410 layer Substances 0.000 claims description 4
- 239000002344 surface layer Substances 0.000 claims 2
- 229910052593 corundum Inorganic materials 0.000 claims 1
- 229910001845 yogo sapphire Inorganic materials 0.000 claims 1
- 239000002985 plastic film Substances 0.000 abstract description 7
- 229920006255 plastic film Polymers 0.000 abstract description 7
- 230000008901 benefit Effects 0.000 abstract description 4
- 230000007613 environmental effect Effects 0.000 abstract description 4
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 abstract 2
- 239000007788 liquid Substances 0.000 description 12
- 229920005644 polyethylene terephthalate glycol copolymer Polymers 0.000 description 8
- 229920000915 polyvinyl chloride Polymers 0.000 description 8
- 239000004800 polyvinyl chloride Substances 0.000 description 8
- 239000003792 electrolyte Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- -1 oxonium ion Chemical class 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
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- Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
Abstract
The invention relates to a method for coating insulating film on an aluminum shell of an electrolytic capacitor by adopting an anodic treatment process, which comprises the steps of immersing the aluminum shell in high-concentration sulfuric acid solution in a hanging manner by a hanger, connecting an anode on the hanger, connecting a cathode on the high-concentration sulfuric acid solution, and electrifying instantly between the anode and the cathode by high voltage to ensure that the aluminum shell generates high temperature due to instant electric shock and forms an aluminum oxide insulating skin film layer on the surface of the aluminum shell, wherein the thickness of the aluminum oxide insulating skin film layer is optimal from 10 mu m to 15 mu m, so that the surface of the aluminum shell forms insulating and protecting functions, the aluminum shell is provided as the shell of the electrolytic capacitor, PVC or PET plastic film is not additionally used for sticking and covering, and the practical benefits of quick coating and meeting the environmental protection requirement are achieved.
Description
Technical field
The present invention is relevant method of giving polarized capacitor aluminum case body covering insulating film, specifically, is to adopt anode processing technique, makes the method for polarized capacitor aluminum case body covering insulating film.
Background technology
See also shown in Figure 3ly, electrolytic capacitor 1, its manufacturing process are aluminum enclosure unit (1) to be combined while filling electrolyte in advance finish assembling (2) with rubber cushion, are coated (3) with one deck PVC or PET in this aluminum enclosure periphery again; See also Fig. 1, shown in Figure 2 again, be to combine with rubber cushion 12 with aluminum enclosure 11, filling electrolyte 13 in it, then in aluminum enclosure 11 peripheral glutinous cover one deck PVC (polyvinyl chloride) or PET (PETG) plastic films 14, pick out conductive feet 15 by electrolyte 13 and aluminum enclosure 11 respectively again, just finish the making of electrolytic capacitor 1.
Prior art has the following problem that needs solution:
1. the employed aluminum enclosure of existing electrolytic capacitor, its extexine are to paste with PVC (polyvinyl chloride) or PET (PETG) plastic film, and its coating is loaded down with trivial details, and can't improve its coating quality, and the aesthetic property of outward appearance is also had a greatly reduced quality.
2. the plastic film that existing aluminum enclosure extexine is sticked can't compliance with environmental protection requirements, and it pollutes for the second time and can't avoid.
3. the aluminum enclosure of existing electrolytic capacitor, it coats with aforementioned PVC or PET plastic film, must many indivedual coating, increase during its worker, will cause cost to improve.
Summary of the invention
The purpose of this invention is to provide a kind of application anode processing technique, be the method for polarized capacitor aluminum case body covering insulating film.
The present invention borrows hanger to be soaked in the high-concentration sulfuric acid liquid aluminum enclosure of electrolytic capacitor; pass to high voltage again; moment shocks by electricity between the high-concentration sulfuric acid liquid of the aluminum enclosure of anode and negative electrode; make aluminum enclosure produce high temperature; and directly form the alundum (Al insulated hull rete of a suitable thickness in the top layer; this its thickness of alundum (Al insulated hull rete is the best with 10 μ m-15 μ m; make and form insulation and protective effect on the aluminum enclosure surface; so that the shell of this aluminum enclosure as electrolytic capacitor to be provided; and do not use PVC or PET plastic film to paste covering in addition, reach the Practical Benefit that coating reaches compliance with environmental protection requirements fast.
Specifically, a kind of employing anode processing technique of the present invention makes the method for polarized capacitor aluminum case body covering insulating film, it is characterized in that this method comprises:
A. hang the aluminum enclosure of electrolytic capacitor with hanger, its hanger connects the positive potential power supply, and aluminum enclosure is positioned on the anode;
B. with a container splendid attire high-concentration sulfuric acid liquid, and be connected to the negative potential power supply, make high-concentration sulfuric acid liquid form negative electrode;
C. the more aforementioned hanger that is hung with aluminum enclosure is soaked in the high-concentration sulfuric acid liquid, aluminum hull is soaked in the high-concentration sulfuric acid liquid fully;
D. with aforesaid anode and the negative electrode logical high voltage of going up of moment, make aluminum enclosure produce high temperature because of shocked by electricity by moment;
E. the aforementioned aluminum enclosure that is positioned at anode is under the high temperature of moment generation, and its surface generates alundum (Al insulated hull rete, makes the aluminum enclosure top layer directly have insulation and the effect of protecting.
Description of drawings
Fig. 1 makes process block diagram for prior art polarized capacitor aluminum case system.
Fig. 2 is the electrolytic capacitor outside drawing.
Fig. 3 is prior art electrolytic capacitor combination generalized section.
Fig. 4 makes process block diagram for aluminum enclosure of the present invention.
Fig. 5 is aluminum enclosure coating action schematic diagram of the present invention.
Fig. 6 finishes the coating generalized section for aluminum enclosure of the present invention.
Drawing reference numeral explanation: electrolytic capacitor 1; Aluminum enclosure 11; Rubber cushion 12; Electrolyte 13; Plastic film 14; Conductive feet 15; Hanger 2; High-concentration sulfuric acid liquid 3; Anode 21; Negative electrode 31; Alundum (Al insulated hull rete 111; Aluminum enclosure unit (1); Finish assembling (2); PVC or PET metallized aluminum housing periphery (3); Aluminum enclosure (4); Aluminum enclosure is soaked in high-concentration sulfuric acid liquid (5); Finish assembling (6).
Embodiment
Seeing also shown in Figure 4ly, is that numerous aluminum enclosure (4) is soaked in the high-concentration sulfuric acid liquid, through high voltage transient electric shock aluminum enclosure, forms one deck alundum (Al insulated hull rete (5) on this surface, then can finish assembling (6).According to aforesaid step, its implementation method is as follows:
See also shown in Figure 5; this hanger 2 is hung with the aluminum enclosure 11 of several electrolytic capacitors; this aluminum enclosure 11 is soaked in the high-concentration sulfuric acid liquid 3; and hanger 2 is for being connected with the anode 21 of positive potential; 3 of high-concentration sulfuric acid liquid are the negative electrode 31 that is connected with negative potential; moment adds suitable high voltage between anode 21 and negative electrode 31; impel aluminum enclosure 11 to produce high temperature; simultaneously by producing chemical change between positive potential oxonium ion and the high-concentration sulfuric acid liquid 3; just at aluminum enclosure 11 surperficial coating one deck alundum (Al insulated hull retes 111; make aluminum enclosure 11 surfaces directly have insulating properties (as Fig. 6), and can produce the protective effect on surface again, more can provide aesthetic; reach rapid processing and directly can combine assembling with the rubber cushion 12 (as Fig. 2) of electrolytic capacitor 1; have quick assembled formation, and environmental benefit is provided, advantage such as do not pollute the environment.
The thickness of the top layer alundum (Al insulated hull rete 111 of aforementioned aluminum enclosure 11 is the best with 10 μ m-15 μ m.
In sum, the present invention borrows high-tension moment to shock by electricity in the anode treatment mode, at aluminum enclosure outer surface coating one deck alundum (Al insulated hull rete of electrolytic capacitor, is the method for making of a kind of quick generation insulation and protective layer directly.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2005101240395A CN1971787A (en) | 2005-11-23 | 2005-11-23 | Method for Coating Aluminum Shell of Electrolytic Capacitor with Insulating Film Using Anode Treatment Process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2005101240395A CN1971787A (en) | 2005-11-23 | 2005-11-23 | Method for Coating Aluminum Shell of Electrolytic Capacitor with Insulating Film Using Anode Treatment Process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1971787A true CN1971787A (en) | 2007-05-30 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2005101240395A Pending CN1971787A (en) | 2005-11-23 | 2005-11-23 | Method for Coating Aluminum Shell of Electrolytic Capacitor with Insulating Film Using Anode Treatment Process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1971787A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102453855A (en) * | 2010-10-28 | 2012-05-16 | 鸿富锦精密工业（深圳）有限公司 | Housing and method for manufacturing the same |
| CN102983292A (en) * | 2011-09-07 | 2013-03-20 | 李正煌 | Method of manufacturing environmental-friendly insulated aluminum case for aluminum electrolytic capacitors and lithium batteries |
| CN104711652A (en) * | 2013-12-11 | 2015-06-17 | 贵州红林机械有限公司 | High-hardness hard anodization technology for processing hard aluminum alloy |
| CN110024068A (en) * | 2017-01-13 | 2019-07-16 | 松下知识产权经营株式会社 | Electrolytic capacitor |
-
2005
- 2005-11-23 CN CNA2005101240395A patent/CN1971787A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102453855A (en) * | 2010-10-28 | 2012-05-16 | 鸿富锦精密工业（深圳）有限公司 | Housing and method for manufacturing the same |
| CN102453855B (en) * | 2010-10-28 | 2014-12-31 | 鸿富锦精密工业（深圳）有限公司 | Shell and manufacturing method thereof |
| CN102983292A (en) * | 2011-09-07 | 2013-03-20 | 李正煌 | Method of manufacturing environmental-friendly insulated aluminum case for aluminum electrolytic capacitors and lithium batteries |
| CN104711652A (en) * | 2013-12-11 | 2015-06-17 | 贵州红林机械有限公司 | High-hardness hard anodization technology for processing hard aluminum alloy |
| CN110024068A (en) * | 2017-01-13 | 2019-07-16 | 松下知识产权经营株式会社 | Electrolytic capacitor |
| US11232913B2 (en) | 2017-01-13 | 2022-01-25 | Panasonic Intellectual Property Management Co., Ltd. | Electrolytic capacitor |
| CN110024068B (en) * | 2017-01-13 | 2022-03-11 | 松下知识产权经营株式会社 | Electrolytic capacitors |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |