CN114883113A - Production process of high-leakage-prevention square aluminum electrolytic capacitor - Google Patents
Production process of high-leakage-prevention square aluminum electrolytic capacitor Download PDFInfo
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- CN114883113A CN114883113A CN202210534436.3A CN202210534436A CN114883113A CN 114883113 A CN114883113 A CN 114883113A CN 202210534436 A CN202210534436 A CN 202210534436A CN 114883113 A CN114883113 A CN 114883113A
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- aluminum
- aluminum foil
- solution
- drying
- electrolytic capacitor
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 113
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 113
- 239000003990 capacitor Substances 0.000 title claims abstract description 38
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 51
- 238000001035 drying Methods 0.000 claims abstract description 38
- 238000007664 blowing Methods 0.000 claims abstract description 26
- 238000006056 electrooxidation reaction Methods 0.000 claims abstract description 11
- 238000004140 cleaning Methods 0.000 claims abstract description 6
- 238000009966 trimming Methods 0.000 claims abstract description 6
- 239000011888 foil Substances 0.000 claims description 65
- 230000007797 corrosion Effects 0.000 claims description 24
- 238000005260 corrosion Methods 0.000 claims description 24
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 claims description 18
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 18
- 239000012535 impurity Substances 0.000 claims description 16
- 239000007788 liquid Substances 0.000 claims description 16
- 239000008367 deionised water Substances 0.000 claims description 15
- 229910021641 deionized water Inorganic materials 0.000 claims description 15
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 12
- 230000002265 prevention Effects 0.000 claims description 12
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 11
- 238000007789 sealing Methods 0.000 claims description 8
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 claims description 6
- 239000012153 distilled water Substances 0.000 claims description 6
- 235000006408 oxalic acid Nutrition 0.000 claims description 6
- YWYZEGXAUVWDED-UHFFFAOYSA-N triammonium citrate Chemical compound [NH4+].[NH4+].[NH4+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O YWYZEGXAUVWDED-UHFFFAOYSA-N 0.000 claims description 6
- 229910021642 ultra pure water Inorganic materials 0.000 claims description 6
- 239000012498 ultrapure water Substances 0.000 claims description 6
- 238000004026 adhesive bonding Methods 0.000 claims description 5
- 238000005520 cutting process Methods 0.000 claims description 5
- 239000011244 liquid electrolyte Substances 0.000 claims description 5
- 238000004806 packaging method and process Methods 0.000 claims description 5
- 238000003825 pressing Methods 0.000 claims description 5
- 238000004506 ultrasonic cleaning Methods 0.000 claims description 5
- 238000005406 washing Methods 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 4
- 238000007689 inspection Methods 0.000 abstract 1
- 238000002360 preparation method Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 7
- 238000012545 processing Methods 0.000 description 6
- 239000005030 aluminium foil Substances 0.000 description 5
- 239000001393 triammonium citrate Substances 0.000 description 5
- 235000011046 triammonium citrate Nutrition 0.000 description 5
- 238000011161 development Methods 0.000 description 4
- 230000018109 developmental process Effects 0.000 description 4
- 230000032683 aging Effects 0.000 description 1
- 239000010407 anodic oxide Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 235000011167 hydrochloric acid Nutrition 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000001117 sulphuric acid Substances 0.000 description 1
- 235000011149 sulphuric acid Nutrition 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
- H01G9/04—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
- H01G9/004—Details
- H01G9/08—Housing; Encapsulation
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/13—Energy storage using capacitors
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Manufacturing & Machinery (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
- Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
Abstract
The invention discloses a production process of a square aluminum electrolytic capacitor with high leakage resistance, which comprises the following steps of pretreatment, electrochemical corrosion, water blowing treatment, drying treatment, trimming, aluminum cylinder preparation, primary assembly, secondary assembly and finished product inspection And (4) cleaning.
Description
Technical Field
The invention relates to a production process of a square aluminum electrolytic capacitor with high leakage prevention.
Background
With the rapid development of the electronic industry, the market of products such as computers, communication products, household appliances and the like is rapidly expanded, the demand of aluminum electrolytic capacitors is also rapidly increased, and at present, the development trend of the aluminum electrolytic capacitors is miniaturization, chip type, high temperature resistance and long service life, so that the control of each process in the production process of the aluminum electrolytic capacitors is important. Among them, especially, the filling effect of the electrolyte in the capacitor and the overall sealing performance are getting more and more important.
The electrolytic capacitor is widely applied to many related industries such as electronics, the technology progress and the industrial development now make higher requirements on the electrolytic capacitor in the aspects of power frequency, low impedance, long service life and the like, along with the development of the electronic industry, electronic products are more and more miniaturized and portable, so that various electronic components tend to develop in the direction of microminiature, the capacitor is not exceptional, the volume of the aluminum electrolytic capacitor is mainly limited by the electrostatic capacity of an anode foil (namely a formed foil), the higher the electrostatic capacity of the anode foil is, the smaller the volume of the capacitor can be made, the electrostatic capacity of the anode foil is in direct proportion to the dielectric constant and the specific surface area of an anodic oxide film and in inverse proportion to the thickness of the oxide film,
however, since the capacitor has a small volume and a large production scale, the quality of the capacitor is improved by strictly controlling the production parameters, which has little effect, and if a more advanced production mode is adopted, the yield can be greatly improved and the quality of the manufactured product can be greatly improved. Therefore, the production process of the square aluminum electrolytic capacitor with high leakage prevention is produced.
Disclosure of Invention
The invention aims to solve the defects of the prior art and provides a production process of a square aluminum electrolytic capacitor with high leakage resistance.
A production process of a square aluminum electrolytic capacitor with high leakage prevention comprises the following steps:
pretreatment: immersing the whole aluminum foil into mixed corrosive liquid for corrosion treatment, repeatedly washing the aluminum foil with normal-temperature pure solution after the corrosion treatment, and finally rinsing the aluminum foil in high constant-temperature solution;
electrochemical corrosion: placing the pretreated aluminum foil in a constant-temperature mixed corrosive solution for electrochemical corrosion, and then placing the aluminum foil in an ultrasonic cleaning machine for cleaning;
and (3) water blowing treatment: placing the cleaned aluminum foil on a high-pressure water blowing table for high-pressure water blowing treatment;
and (3) drying treatment: drying the aluminum foil subjected to high-pressure water blowing treatment in a drying oven to form an aluminum foil finished product;
trimming: cutting the aluminum foil into a specified part shape on a slicing machine, and riveting pins;
preparing an aluminum cylinder: manufacturing an aluminum cylinder by an automatic roller pressing machine, injecting liquid electrolyte into the aluminum cylinder, and then inserting a bent aluminum strip as a positive electrode;
primary assembly: putting the cylindrical aluminum cylinder on a high-pressure water blowing table again to remove surface impurities, immediately putting the cylindrical aluminum cylinder into a vacuum drier, and drying at constant temperature for 5-10 min;
secondary assembly: extracting the head of the pin, sleeving and riveting a capacitor shell, and performing gluing and sealing treatment after riveting to obtain a capacitor finished product;
and (4) inspecting a finished product: and (5) inspecting the electrical performance of the finished product, and packaging and delivering the finished product according with the product requirement.
As a further improvement, the pure solution is deionized water which is water with high purity, so that impurities on the surface of the corroded aluminum foil can be effectively removed, and the quality of the aluminum foil in the next processing step is ensured.
As a further improvement, the high constant temperature solution is a deionized water solution, a distilled water solution and an ultra-pure water solution which are heated to 60-80 degrees.
As a further improvement, the mixed corrosive liquid consists of hydrochloric acid, sulfuric acid, an oxalic acid solution, ammonium diacid, citric acid and a triammonium citrate solution, the surface of the aluminum foil is corroded by the mixed corrosive liquid, impurities on the surface of the aluminum foil are fully removed, the operation ratio is simple, and the corrosion effect is good.
As a further improvement, in the step (4), the drying temperature is 250-450 degrees, and the drying time is 3-5 minutes.
As a further improvement, in the step (7), the drying temperature is 150-300 ℃, and the drying time is 5 minutes.
Has the advantages that:
this device at first utilizes deionized water to wash, can effectively get rid of the impurity on the aluminium foil surface after the corruption, guarantee the quality of aluminium foil processing on next step, then utilize deionized water solution, distilled water solution and ultrapure water solution carry out the secondary and clean, the surperficial pure degree of better assurance aluminium foil, make the product impurity reduce, mixed corrosive liquid is by hydrochloric acid, sulphuric acid, oxalic acid solution, ammonium diacid, citric acid and the triammonium citrate solution are constituteed, utilize mixed corrosive liquid to corrode the surface of aluminium foil, fully get rid of the impurity on aluminium foil surface, operation ratio is simple, the corrosion effect is good, guarantee to guarantee more abundant flooding in subsequent processing, it is clean.
The device can ensure the structural stability and the sealing performance of the square aluminum electrolytic capacitor by using glue coating and sealing, prolong the service life and reduce the aging speed.
Detailed Description
For the purpose of enhancing understanding of the present invention, the present invention will be further described in detail with reference to the following examples, which are provided for illustration only and are not to be construed as limiting the scope of the present invention.
Example 1:
a production process of a square aluminum electrolytic capacitor with high leakage prevention comprises the following steps:
pretreatment: immersing the whole aluminum foil into mixed corrosive liquid for corrosion treatment, repeatedly washing the aluminum foil with normal-temperature pure solution after the corrosion treatment, and finally rinsing the aluminum foil in high constant-temperature solution; the pure solution is deionized water, the deionized water is water with high purity, impurities on the surface of the aluminum foil after corrosion can be effectively removed, the quality of the aluminum foil in the next processing is ensured, the high constant temperature solution is a deionized water solution, a distilled water solution and an ultrapure water solution which are heated to 60 ℃, the mixed corrosion liquid consists of hydrochloric acid, sulfuric acid, an oxalic acid solution, ammonium diacid, citric acid and a triammonium citrate solution, the surface of the aluminum foil is corroded by the mixed corrosion liquid, the impurities on the surface of the aluminum foil are fully removed, the operation ratio is simple, and the corrosion effect is good;
electrochemical corrosion: placing the pretreated aluminum foil in a constant-temperature mixed corrosive solution for electrochemical corrosion, and then placing the aluminum foil in an ultrasonic cleaning machine for cleaning;
and (3) water blowing treatment: placing the cleaned aluminum foil on a high-pressure water blowing table for high-pressure water blowing treatment;
and (3) drying treatment: drying the aluminum foil subjected to high-pressure water blowing treatment in an oven to form an aluminum foil finished product, wherein the drying temperature is 250 ℃, and the drying time is 3 minutes;
trimming: cutting the aluminum foil into a specified part shape on a slicing machine, and riveting pins;
preparing an aluminum cylinder: manufacturing an aluminum cylinder by an automatic roller pressing machine, injecting liquid electrolyte into the aluminum cylinder, and then inserting a bent aluminum strip as a positive electrode;
primary assembly: putting the cylindrical aluminum cylinder on a high-pressure water blowing table again to remove surface impurities, immediately putting the cylindrical aluminum cylinder into a vacuum drier, and drying at constant temperature for 5 min; the drying temperature is 150 ℃, and the drying time is 5 minutes;
secondary assembly: extracting the head of the pin, sleeving and riveting a capacitor shell, and performing gluing and sealing treatment after riveting to obtain a capacitor finished product;
and (4) inspecting a finished product: and (5) inspecting the electrical performance of the finished product, and packaging and delivering the finished product according with the product requirement.
Example 2:
a production process of a square aluminum electrolytic capacitor with high leakage prevention comprises the following steps:
pretreatment: immersing the whole aluminum foil into mixed corrosive liquid for corrosion treatment, repeatedly washing the aluminum foil with normal-temperature pure solution after the corrosion treatment, and finally rinsing the aluminum foil in high constant-temperature solution; the pure solution is deionized water, the deionized water is water with high purity, impurities on the surface of the aluminum foil after corrosion can be effectively removed, the quality of the aluminum foil in the next processing is ensured, the high constant temperature solution is a deionized water solution, a distilled water solution and an ultrapure water solution which are heated to 80 ℃, the mixed corrosion liquid consists of hydrochloric acid, sulfuric acid, an oxalic acid solution, ammonium diacid, citric acid and a triammonium citrate solution, the surface of the aluminum foil is corroded by the mixed corrosion liquid, the impurities on the surface of the aluminum foil are fully removed, the operation ratio is simple, and the corrosion effect is good;
electrochemical corrosion: placing the pretreated aluminum foil in a constant-temperature mixed corrosive solution for electrochemical corrosion, and then placing the aluminum foil in an ultrasonic cleaning machine for cleaning;
and (3) water blowing treatment: placing the cleaned aluminum foil on a high-pressure water blowing table for high-pressure water blowing treatment;
and (3) drying treatment: drying the aluminum foil subjected to high-pressure water blowing treatment in an oven to form an aluminum foil finished product, wherein the drying temperature is 450 ℃, and the drying time is 5 minutes;
trimming: cutting the aluminum foil into a specified part shape on a slicing machine, and riveting pins;
preparing an aluminum cylinder: manufacturing an aluminum cylinder by an automatic roller pressing machine, injecting liquid electrolyte into the aluminum cylinder, and then inserting a bent aluminum strip as a positive electrode;
primary assembly: putting the cylindrical aluminum cylinder on a high-pressure water blowing table again to remove surface impurities, immediately putting the cylindrical aluminum cylinder into a vacuum drier, and drying at constant temperature for 10 min; the drying temperature is 300 ℃, and the drying time is 5 minutes;
secondary assembly: extracting the head of the pin, sleeving and riveting a capacitor shell, and performing gluing and sealing treatment after riveting to obtain a capacitor finished product;
and (4) inspecting a finished product: and (5) inspecting the electrical performance of the finished product, and packaging and delivering the finished product according with the product requirement.
Example 3:
a production process of a square aluminum electrolytic capacitor with high leakage prevention comprises the following steps:
pretreatment: immersing the whole aluminum foil into mixed corrosive liquid for corrosion treatment, repeatedly washing the aluminum foil with normal-temperature pure solution after the corrosion treatment, and finally rinsing the aluminum foil in high constant-temperature solution; the pure solution is deionized water, the deionized water is water with high purity, impurities on the surface of the aluminum foil after corrosion can be effectively removed, the quality of the aluminum foil in the next processing is ensured, the high constant temperature solution is a deionized water solution, a distilled water solution and an ultrapure water solution which are heated to 70 degrees, the mixed corrosion liquid consists of hydrochloric acid, sulfuric acid, an oxalic acid solution, ammonium diacid, citric acid and a triammonium citrate solution, the surface of the aluminum foil is corroded by the mixed corrosion liquid, the impurities on the surface of the aluminum foil are fully removed, the operation ratio is simple, and the corrosion effect is good;
electrochemical corrosion: placing the pretreated aluminum foil in a constant-temperature mixed corrosive solution for electrochemical corrosion, and then placing the aluminum foil in an ultrasonic cleaning machine for cleaning;
and (3) water blowing treatment: placing the cleaned aluminum foil on a high-pressure water blowing table for high-pressure water blowing treatment;
and (3) drying treatment: drying the aluminum foil subjected to high-pressure water blowing treatment in an oven to form an aluminum foil finished product, wherein the drying temperature is 450 ℃, and the drying time is 4 minutes;
trimming: cutting the aluminum foil into a specified part shape on a slicing machine, and riveting pins;
preparing an aluminum cylinder: manufacturing an aluminum cylinder by an automatic roller pressing machine, injecting liquid electrolyte into the aluminum cylinder, and then inserting a bent aluminum strip as a positive electrode;
primary assembly: putting the cylindrical aluminum cylinder on a high-pressure water blowing table again to remove surface impurities, immediately putting the cylindrical aluminum cylinder into a vacuum drier, and drying at constant temperature for 5 min; the drying temperature is 300 ℃, and the drying time is 5 minutes;
secondary assembly: extracting the head of the pin, sleeving and riveting a capacitor shell, and performing gluing and sealing treatment after riveting to obtain a capacitor finished product;
and (4) inspecting a finished product: and (5) inspecting the electrical performance of the finished product, and packaging and delivering the finished product according with the product requirement.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (6)
1. A production process of a square aluminum electrolytic capacitor with high leakage prevention is characterized by comprising the following steps:
1) pretreatment: immersing the whole aluminum foil into mixed corrosive liquid for corrosion treatment, repeatedly washing the aluminum foil with normal-temperature pure solution after the corrosion treatment, and finally rinsing the aluminum foil in high constant-temperature solution;
2) electrochemical corrosion: placing the pretreated aluminum foil in a constant-temperature mixed corrosive solution for electrochemical corrosion, and then placing the aluminum foil in an ultrasonic cleaning machine for cleaning;
3) and (3) water blowing treatment: placing the cleaned aluminum foil on a high-pressure water blowing table for high-pressure water blowing treatment;
4) and (3) drying treatment: drying the aluminum foil subjected to high-pressure water blowing treatment in a drying oven to form an aluminum foil finished product;
5) trimming: cutting the aluminum foil into a specified part shape on a slicing machine, and riveting pins;
6) preparing an aluminum cylinder: manufacturing an aluminum cylinder by an automatic roller pressing machine, injecting liquid electrolyte into the aluminum cylinder, and then inserting a bent aluminum strip as a positive electrode;
7) primary assembly: putting the cylindrical aluminum cylinder on a high-pressure water blowing table again to remove surface impurities, immediately putting the cylindrical aluminum cylinder into a vacuum drier, and drying at constant temperature for 5-10 min;
8) secondary assembly: extracting the head of the pin, sleeving and riveting a capacitor shell, and performing gluing and sealing treatment after riveting to obtain a capacitor finished product;
9) and (4) inspecting a finished product: and (5) inspecting the electrical performance of the finished product, and packaging and delivering the finished product according with the product requirement.
2. The process for manufacturing a square aluminum electrolytic capacitor with high leakage prevention according to claim 1, wherein the pure solution is deionized water.
3. The production process of a square aluminum electrolytic capacitor with high leakage prevention according to claim 1, wherein the high constant temperature solution is a deionized water solution, a distilled water solution and an ultra-pure water solution heated to 60-80 °.
4. The process for producing a square aluminum electrolytic capacitor with high leakage prevention according to claim 1, wherein the mixed corrosive liquid is composed of hydrochloric acid, sulfuric acid, oxalic acid solution, ammonium diacid, citric acid and ammonium citrate tribasic solution.
5. The production process of a high leakage prevention square aluminum electrolytic capacitor as claimed in claim 1, wherein the drying temperature in the step (4) is 250 to 450 ° and the drying time is 3 to 5 minutes.
6. The process for producing a square aluminum electrolytic capacitor with high leakage prevention according to claim 1, wherein the drying temperature in the step (7) is 150 to 300 ℃, and the drying time is 5 minutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210534436.3A CN114883113A (en) | 2022-05-17 | 2022-05-17 | Production process of high-leakage-prevention square aluminum electrolytic capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210534436.3A CN114883113A (en) | 2022-05-17 | 2022-05-17 | Production process of high-leakage-prevention square aluminum electrolytic capacitor |
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| Publication Number | Publication Date |
|---|---|
| CN114883113A true CN114883113A (en) | 2022-08-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210534436.3A Pending CN114883113A (en) | 2022-05-17 | 2022-05-17 | Production process of high-leakage-prevention square aluminum electrolytic capacitor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114883113A (en) |
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2022
- 2022-05-17 CN CN202210534436.3A patent/CN114883113A/en active Pending
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