CN113674999B - Liquid aluminum electrolytic capacitor resistant to edge short circuit and preparation method thereof - Google Patents
Liquid aluminum electrolytic capacitor resistant to edge short circuit and preparation method thereof Download PDFInfo
- Publication number
- CN113674999B CN113674999B CN202110855641.5A CN202110855641A CN113674999B CN 113674999 B CN113674999 B CN 113674999B CN 202110855641 A CN202110855641 A CN 202110855641A CN 113674999 B CN113674999 B CN 113674999B
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- China
- Prior art keywords
- core
- electrolytic capacitor
- liquid aluminum
- core bag
- aluminum electrolytic
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- 239000003990 capacitor Substances 0.000 title claims abstract description 36
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 34
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 34
- 239000007788 liquid Substances 0.000 title claims abstract description 24
- 238000002360 preparation method Methods 0.000 title description 5
- 239000011888 foil Substances 0.000 claims abstract description 41
- -1 trihydroxyethyl isocyanurate Chemical compound 0.000 claims abstract description 21
- 239000000843 powder Substances 0.000 claims abstract description 20
- 238000000034 method Methods 0.000 claims abstract description 18
- 239000003792 electrolyte Substances 0.000 claims abstract description 15
- 238000007789 sealing Methods 0.000 claims abstract description 4
- 229920001971 elastomer Polymers 0.000 claims abstract description 3
- 238000005470 impregnation Methods 0.000 claims description 9
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 238000004804 winding Methods 0.000 claims description 6
- 230000032683 aging Effects 0.000 claims description 5
- 238000005520 cutting process Methods 0.000 claims description 5
- 239000002390 adhesive tape Substances 0.000 claims description 3
- 239000003292 glue Substances 0.000 claims description 2
- 238000005507 spraying Methods 0.000 claims description 2
- 238000005119 centrifugation Methods 0.000 claims 1
- 239000007921 spray Substances 0.000 claims 1
- 230000001934 delay Effects 0.000 abstract description 3
- 238000002309 gasification Methods 0.000 abstract description 3
- 238000010521 absorption reaction Methods 0.000 abstract 1
- 238000004880 explosion Methods 0.000 description 4
- 230000002265 prevention Effects 0.000 description 2
- BPXVHIRIPLPOPT-UHFFFAOYSA-N 1,3,5-tris(2-hydroxyethyl)-1,3,5-triazinane-2,4,6-trione Chemical compound OCCN1C(=O)N(CCO)C(=O)N(CCO)C1=O BPXVHIRIPLPOPT-UHFFFAOYSA-N 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229920005549 butyl rubber Polymers 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000001179 sorption measurement 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
- H01G9/04—Electrodes or formation of dielectric layers thereon
-
- 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
- H01G9/042—Electrodes or formation of dielectric layers thereon characterised by the material
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
Abstract
A liquid aluminum electrolytic capacitor resistant to edge short circuit comprises a shell and a core bag, wherein the core bag is arranged in the shell in a sealing mode through a rubber plug; the core package comprises anode foil, cathode foil and electrolytic paper; the bottom or/and the top of the core bag is adsorbed with the trihydroxyethyl isocyanurate powder. According to the invention, the trihydroxyethyl isocyanurate powder is partially dissolved after being adsorbed at the bottom or/and the top of the core package, so that redundant electrolyte at the bottom or/and the top of the core package can be well absorbed, and the flash voltage at the edge of the core package is improved; meanwhile, surplus trihydroxyethyl isocyanurate, the heat that gives off among the explosion-proof in-process of absorption core package is dissolved to the heat of accessible self, delays the gasification of electrolyte for explosion-proof valve can not bear big atmospheric pressure in the twinkling of an eye, and explosion-proof valve is a process occasionally opening, and explosion-proof valve is opened slowly, and this can be fine the point of realization condenser is explosion-proof.
Description
Technical Field
The invention relates to the field of aluminum electrolytic capacitors, in particular to a liquid aluminum electrolytic capacitor resistant to edge short circuit and a preparation method thereof.
Background
Capacitors are widely used in electronic products such as information electronics, instruments and meters, and electromechanical home appliances, as one of indispensable components in electronic products. The aluminum electrolytic capacitor is the most special capacitor in the capacitors and has the advantages of small volume, high power, high cost performance and the like. However, in the production process of the aluminum electrolytic capacitor, when the core package is impregnated, the whole core package is impregnated in the electrolyte, so the electrolyte is present at the bottom and the top of the core package, and the phenomenon that the anode foil on the core package and the bottom of the aluminum shell are ignited is easy to occur after the capacitor is assembled.
In order to solve the problem, a layer of electrolytic paper can be padded at the bottom of the aluminum shell, the core package is isolated from the aluminum shell by adopting a physical isolation method, and the electrolytic paper can absorb certain electrolyte so as to reduce the possibility of short circuit between the core package and the aluminum shell. For example, in the utility model patent No. 201614372.3, a packing paper is provided between the core pack and the aluminum case. However, the method has the disadvantages that firstly, the electrolytic paper can improve the explosion-proof pressure of the aluminum shell, and hinder the release of the internal pressure to a certain extent, so that the explosion-proof valve cracks in the opening process of the explosion-proof valve, and the explosion-proof valve cannot realize point explosion prevention, and secondly, the electrolytic paper padded at the bottom of the aluminum shell is easily punched out from the bottom of the aluminum shell when the explosion-proof valve is opened, and does not meet the requirements of the explosion-proof process. In addition, excessive electrolyte existing at the contact part of the upper part of the core bag and the colloidal particles is easy to cause edge flash, so that the capacitor is easy to strike fire.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a liquid aluminum electrolytic capacitor which is resistant to edge short circuit and can well realize capacitor point explosion prevention and a preparation method thereof.
In order to solve the technical problems, the technical scheme provided by the invention is as follows: the liquid aluminum electrolytic capacitor with the edge short circuit resistance comprises a shell and a core bag, wherein the core bag is arranged in the shell in a sealing mode through a rubber plug; the core bag comprises anode foil, cathode foil and electrolytic paper; the bottom or/and the top of the core bag is/are adsorbed with the trihydroxyethyl isocyanurate powder.
In the above liquid aluminum electrolytic capacitor with edge short circuit resistance, preferably, the electrolytic paper extends out of the upper and lower ends of the anode foil.
In the above liquid aluminum electrolytic capacitor with edge short circuit resistance, preferably, the outer layer of the core bag is wound with 1-2 layers of electrolytic paper and fixed by using adhesive tape or glue.
The preparation method of the edge short circuit resistant liquid aluminum electrolytic capacitor comprises the following steps:
1) Cutting the anode foil, the cathode foil and the electrolytic paper into predetermined sizes;
2) Riveting the anode guide pin and the anode foil, riveting the cathode guide pin and the cathode foil, and winding the riveted anode foil, cathode foil and electrolytic paper into a core package;
3) Immersing the core bag into electrolyte for impregnation;
4) Adsorbing the trihydroxyethyl isocyanurate powder at the bottom or/and the top of the core package subjected to impregnation in the step 3);
5) Assembling;
6) A sleeve;
7) And (5) aging.
In the above method for producing a liquid aluminum electrolytic capacitor resistant to edge short, it is preferable that the impregnation treatment in the step 3) is followed by centrifugal liquid removal.
Preferably, in the step 4), the bottom of the core package is placed into the tris-hydroxyethyl isocyanurate powder to adsorb the powder.
In the above method for preparing the liquid aluminum electrolytic capacitor resistant to the edge short, preferably, in step 4), the tris (hydroxyethyl) isocyanurate powder is sprayed on the top of the core package by using a nozzle.
Compared with the prior art, the invention has the advantages that: according to the invention, the trihydroxyethyl isocyanurate powder is partially dissolved after being adsorbed at the bottom or/and the top of the core package, so that redundant electrolyte at the bottom or/and the top of the core package can be well absorbed, and the flash voltage at the edge of the core package is improved; meanwhile, the remained trihydroxyethyl isocyanurate can be dissolved by heat of the remained trihydroxyethyl isocyanurate, absorbs heat emitted in the explosion-proof process of the core package, delays the gasification of electrolyte, prevents the explosion-proof valve from instantly bearing large air pressure, has a process when being opened, and is slowly opened, so that the capacitor can be well protected against explosion.
Detailed Description
In order to facilitate an understanding of the invention, the invention will now be described more fully and in detail with reference to the preferred embodiments, but the scope of the invention is not limited to the specific embodiments described below.
It should be particularly noted that when an element is referred to as being "fixed to, connected to or communicated with" another element, it can be directly fixed to, connected to or communicated with the other element or indirectly fixed to, connected to or communicated with the other element through other intermediate connecting components.
Unless otherwise defined, all terms of art used hereinafter have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the present invention.
Example 1
The liquid aluminum electrolytic capacitor with the edge short circuit resistance comprises a shell and a core bag, wherein the core bag is arranged in the shell in a sealing mode through a butyl rubber plug. The core bag comprises anode foil, cathode foil and electrolytic paper, wherein the electrolytic paper extends out of the upper end and the lower end of the anode foil. And the trihydroxyethyl isocyanurate powder is adsorbed at the bottom and the top of the core bag.
When cutting the anode foil, burr is often formed at the cutting position, so that point discharge is easily generated at the cutting position when the product is used, the anode foil is conducted with the aluminum shell, or the anode foil is conducted with the cathode foil, and the capacitor is damaged. Through the design that the electrolytic paper stretches out the upper and lower both ends of anode foil, can increase the distance of anode foil and aluminium shell, separate anode foil and negative pole foil better simultaneously, reduced the influence of tip discharge to the condenser.
In this embodiment, the method for manufacturing the liquid aluminum electrolytic capacitor resistant to the edge short circuit includes the following steps:
(1) The anode foil, cathode foil and electrolytic paper are cut as designed to achieve the specified size of the capacitor.
(2) And riveting the anode guide pin with the anode foil, and riveting the cathode guide pin with the cathode foil. And then stacking the anode foil, the cathode foil and the electrolytic paper together, enabling the electrolytic paper to extend out of the upper end and the lower end of the anode foil, and winding the anode foil, the cathode foil and the electrolytic paper into a core package by using a winding machine. And after winding is finished, winding 1-2 layers of electrolytic paper on the outer layer of the core bag, and fixing by using an adhesive tape.
(3) And immersing the core bag into electrolyte, and performing impregnation treatment on the core bag by using a hydraulic impregnation device so that the electrolyte is fully impregnated on the electrolytic paper. And after impregnation treatment, performing centrifugal liquid removal, and throwing away redundant electrolyte outside the core bag.
(4) And (4) placing the core package treated in the step (3) into the trihydroxyethyl isocyanurate powder, so that the powder enters the bottom of the core package, and the powder is fully adsorbed to the bottom of the core package. And after the bottom adsorption is finished, spraying the trihydroxyethyl isocyanurate powder on the top of the core bag by using a nozzle.
(5) And (5) assembling the core package treated in the step (4) on an assembling machine, and shaking off the redundant trihydroxyethyl isocyanurate powder through a vibration disc of the assembling machine in the assembling process.
(6) And sleeving the assembled and sealed capacitor with a sleeve.
(7) And applying voltage to the capacitor sleeved with the insulating sleeve, aging in an aging machine, and obtaining a product after aging is completed.
According to the liquid aluminum electrolytic capacitor resistant to the edge short circuit, the trihydroxyethyl isocyanurate powder is adsorbed at the bottom and the top of the core package, redundant electrolyte at the bottom and the top of the core package can be well absorbed through partial dissolution of the trihydroxyethyl isocyanurate, and the flash voltage at the edge of the core package is improved; meanwhile, the remained trihydroxyethyl isocyanurate can be dissolved by heat of the remained trihydroxyethyl isocyanurate, absorbs heat emitted in the explosion-proof process of the core package, delays the gasification of electrolyte, prevents the explosion-proof valve from instantly bearing large air pressure, has a process when being opened, and is slowly opened, so that the capacitor can be well protected against explosion.
Claims (7)
1. The liquid aluminum electrolytic capacitor with the edge short circuit resistance comprises a shell and a core bag, wherein the core bag is arranged in the shell in a sealing mode through a rubber plug; the method is characterized in that: the core bag comprises anode foil, cathode foil and electrolytic paper; the bottom or/and the top of the core bag is/are adsorbed with the trihydroxyethyl isocyanurate powder.
2. The liquid aluminum electrolytic capacitor resistant to edge shorts of claim 1, wherein: the electrolytic paper extends out of the upper end and the lower end of the anode foil.
3. The liquid aluminum electrolytic capacitor resistant to edge shorts of claim 1, wherein: the outer layer of the core bag is wound with 1-2 layers of electrolytic paper and is fixed by adhesive tape or glue.
4. The method for manufacturing an edge short resistant liquid aluminum electrolytic capacitor according to any one of claims 1 to 3, wherein: the method comprises the following steps:
1) Cutting the anode foil, the cathode foil and the electrolytic paper into predetermined sizes;
2) Riveting the anode guide pin and the anode foil, riveting the cathode guide pin and the cathode foil, and winding the anode foil, the cathode foil and the electrolytic paper which are subjected to riveting treatment into a core package;
3) Immersing the core bag into electrolyte for impregnation;
4) Adsorbing the trihydroxyethyl isocyanurate powder at the bottom or/and the top of the core package subjected to impregnation in the step 3);
5) Assembling;
6) A sleeve;
7) And (5) aging.
5. The method for manufacturing the liquid aluminum electrolytic capacitor resistant to the edge short circuit according to claim 4, characterized in that: and 3) after impregnation treatment, performing centrifugation and liquid removal.
6. The method for manufacturing the liquid aluminum electrolytic capacitor resistant to the edge short circuit according to claim 4, characterized in that: and 4), putting the bottom of the core bag into the trihydroxyethyl isocyanurate powder, and adsorbing the powder.
7. The method for manufacturing the liquid aluminum electrolytic capacitor resistant to the edge short circuit according to claim 4, characterized in that: said step 4), spray-coating the powder of trihydroxyethyl isocyanurate on the top of the core bag by using a spray nozzle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110855641.5A CN113674999B (en) | 2021-07-28 | 2021-07-28 | Liquid aluminum electrolytic capacitor resistant to edge short circuit and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110855641.5A CN113674999B (en) | 2021-07-28 | 2021-07-28 | Liquid aluminum electrolytic capacitor resistant to edge short circuit and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113674999A CN113674999A (en) | 2021-11-19 |
| CN113674999B true CN113674999B (en) | 2022-10-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110855641.5A Active CN113674999B (en) | 2021-07-28 | 2021-07-28 | Liquid aluminum electrolytic capacitor resistant to edge short circuit and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW583226B (en) * | 2002-12-17 | 2004-04-11 | Ind Technology Res Inst Materi | Formulation in preparing solid electrolytic capacitor and process thereof |
| KR100649633B1 (en) * | 2005-02-15 | 2006-11-27 | 삼성전기주식회사 | Resin composition for embedded capacitor excellent in adhesive property, heat resistance and fire retardancy |
| CN103250283B (en) * | 2010-12-31 | 2016-01-13 | 爱敬油化株式会社 | For the cathode active material and preparation method thereof of lithium secondary battery, and utilize its lithium secondary battery |
| JPWO2020241843A1 (en) * | 2019-05-31 | 2020-12-03 |
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| CN113674999A (en) | 2021-11-19 |
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