CN110993352A - Aging method of aluminum electrolytic capacitor - Google Patents
Aging method of aluminum electrolytic capacitor Download PDFInfo
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- CN110993352A CN110993352A CN201911373312.6A CN201911373312A CN110993352A CN 110993352 A CN110993352 A CN 110993352A CN 201911373312 A CN201911373312 A CN 201911373312A CN 110993352 A CN110993352 A CN 110993352A
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- aging
- aluminum electrolytic
- temperature
- electrolytic capacitor
- voltage
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- 230000032683 aging Effects 0.000 title claims abstract description 99
- 239000003990 capacitor Substances 0.000 title claims abstract description 51
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 38
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 22
- 230000002431 foraging effect Effects 0.000 claims description 11
- 239000011888 foil Substances 0.000 abstract description 16
- 230000000694 effects Effects 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 239000000047 product Substances 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 4
- 238000004806 packaging method and process Methods 0.000 description 4
- 230000015556 catabolic process Effects 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000012797 qualification Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000003487 electrochemical reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000010985 leather Substances 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 238000004804 winding 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
- H01G9/145—Liquid electrolytic capacitors
-
- 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
- H01G9/0032—Processes of manufacture formation of the dielectric layer
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Manufacturing & Machinery (AREA)
- Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
Abstract
The invention relates to the technical field of capacitor manufacturing, and discloses an aging method of an aluminum electrolytic capacitor. The aging method of the aluminum electrolytic capacitor comprises four times of aging, wherein the first time of aging is boosted to the working voltage more than 1.05 times, the second time of aging is not higher than 0.98 times of the working voltage, the third time of aging and the fourth time of aging are boosted to the working voltage more than 1.03 times, the first time of aging and the fourth time of aging are normal temperature aging, the second time of aging and the third time of aging are high temperature aging, the high temperature is 55-70 ℃, and the working voltage is the working voltage of the aluminum electrolytic capacitor. The method reduces the temperature of the high-temperature aging step, and increases the high-temperature aging with lower temperature once again in the high-temperature aging process, thereby improving the repair effect of the oxide film on the surface of the foil.
Description
Technical Field
The invention relates to the technical field of capacitor manufacturing, in particular to an aging method of an aluminum electrolytic capacitor.
Background
Aluminum electrolytic capacitors having the advantage of relatively large capacity are popular in electronic devices, and are currently widely used in industries such as notebook computers, ballasts, automotive electronics, and the like. With the continuous development of the electronic equipment industry and the continuous increase of the use demand, the requirements for the aluminum electrolytic capacitor are also gradually increased, for example, flash lamps, overhead lamps, external photographing lamps and the like applied to photographic equipment, and because the lamps need to meet some use requirements such as long service life, less harmful light radiation, low heat productivity, small volume and the like, the aluminum electrolytic capacitor applied to the lamps also needs to meet the requirements such as high voltage, small volume, large capacity and the like.
In the case of a capacitor with particularly small volume requirements, the capacity of the aluminum foil can only be increased by reducing the withstand voltage of the aluminum foil, which means that the leakage current increases. The improvement of the aging process can lead the aluminum foil to have low withstand voltage without increasing leakage current. The aging is to apply direct current voltage to the anode foil and the cathode foil to cause electrochemical reaction inside the core bag to repair the oxide film damaged in the previous process, and the constant current voltage boosting is started, and after the voltage is raised to a specified voltage, the constant voltage aging is carried out, and the constant voltage aging is divided into three stages of normal temperature aging, high temperature aging and normal temperature aging. The inventor discloses a method for aging an aluminum electrolytic capacitor in Chinese patent application CN201811559205.8 filed in 2018, which can improve the repair effect of an oxide film on the surface of a foil, reduce the breakdown rate of the aluminum electrolytic capacitor, improve the repair effect of the oxide film on the surface of the foil, reduce the breakdown rate and leakage current of the aluminum electrolytic capacitor, improve the yield and the service life of the aluminum electrolytic capacitor, but the temperature in the high-temperature aging step is as high as 85 ℃, so that the risk of damaging the oxide film is caused, the temperature is high, the energy consumption is high, and the requirement on equipment is high.
Disclosure of Invention
The invention aims to overcome the defects of the background technology and provide a method for aging an aluminum electrolytic capacitor, which reduces the temperature of a high-temperature aging step, increases the high-temperature aging with lower temperature again in the high-temperature aging process and improves the repair effect of an oxide film on the surface of a foil.
In order to achieve the purpose of the invention, the aging method of the aluminum electrolytic capacitor comprises four times of aging, wherein the first time of aging is boosted to the working voltage of more than 1.05 times, the second time of aging is not higher than 0.98 times of the working voltage, the third time of aging and the fourth time of aging are boosted to the working voltage of more than 1.03 times, the first time of aging and the fourth time of aging are normal temperature aging, the second time of aging and the third time of aging are high temperature aging, the high temperature is 55-70 ℃, and the working voltage is the working voltage of the aluminum electrolytic capacitor.
Further, the temperature of the second aging is 68-72 ℃.
Preferably, the second aging temperature is 70 ℃.
Further, the third aging temperature is 53-57 ℃.
Preferably, the third aging temperature is 55 ℃.
Further, the first aging is carried out to increase the voltage to 1.05-1.08 times of the working voltage.
Further, the second aging voltage is 0.95-0.98 times of the working voltage.
Further, the third time and the fourth time of aging are boosted to 1.03-1.05 times of working voltage.
Further, the voltage of each aging step is kept for a certain time after being adjusted to the required range, the first aging is carried out for 5.5h-6.5h after the voltage is increased to 1.05-1.08 times of the working voltage, the second aging is carried out for 1.5h-2.5h after the working voltage is increased to 0.95-0.98 times of the working voltage, the third aging is carried out for 5.5h-6.5h after the voltage is increased to 1.03-1.05 times of the working voltage, and the fourth aging is carried out for 1.5h-2.5h after the voltage is increased to 1.03-1.05 times of the working voltage.
Preferably, the voltage of each aging step is kept for a certain time after being adjusted to the required range, the pressure of the first aging is increased to 1.05-1.08 times of the working voltage and then kept for 6 hours, the pressure of the second aging is kept for 2 hours at 0.95-0.98 times of the working voltage, the pressure of the third aging is increased to 1.03-1.05 times of the working voltage and then kept for 6 hours, and the pressure of the fourth aging is increased to 1.03-1.05 times of the working voltage and then kept for 2 hours.
In the invention, the normal temperature is 20-25 ℃.
Compared with the prior art, the invention reduces the temperature of high-temperature aging, but increases the high-temperature aging at a lower temperature on the basis of the high-temperature aging at one time, so that the electrolyte can permeate into the micropores of the anode foil, the oxide film can be better repaired, the leakage current of the capacitor is reduced, the risk of damaging the oxide film is avoided, the energy consumption is low, the process is simple, and the requirement on equipment is lower.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention. It is to be understood that the following description is only illustrative of the present invention and is not to be construed as limiting the present invention.
When an amount, concentration, or other value or parameter is expressed as a range, preferred range, or as a range of upper preferable values and lower preferable values, this is to be understood as specifically disclosing all ranges formed from any pair of any upper range limit or preferred value and any lower range limit or preferred value, regardless of whether ranges are separately disclosed. For example, when a range of "1 to 5" is disclosed, the described range should be interpreted to include the ranges "1 to 4", "1 to 3", "1 to 2 and 4 to 5", "1 to 3 and 5", and the like. When a range of values is described herein, unless otherwise stated, the range is intended to include the endpoints thereof and all integers and fractions within the range.
In addition, the working voltage of the aluminum electrolytic capacitor is the working voltage of the aluminum electrolytic capacitor in the examples and the comparative examples, the normal temperature is 20 ℃ to 25 ℃, the technical characteristics involved in the respective embodiments can be combined with each other as long as the technical characteristics do not conflict with each other, wherein in each step of boosting, the boosting current is the boosting current
Milliampere/milliampere, C is the capacitance of the aluminum electrolytic capacitor, and V is the working voltage of the aluminum electrolytic capacitor.
The manufacturing method of the aluminum electrolytic capacitor comprises the following steps:
(1) cutting foil: cutting the capacitor paper, the anode foil, the cathode foil and the aluminum leading-out strip into specified sizes for the next working procedure;
(2) winding: riveting the lead strip or lead on the corresponding aluminum foil, and rolling the riveted anode and cathode foils and electrolytic paper into a capacitor core;
(3) dipping: after the core is dried, the core is soaked in electrolyte with corresponding working voltage and is used as a cathode to play a role in repairing an oxide film;
(4) assembling and sealing: riveting or welding the core and the cover plate, and leading the wire product: two leads of the core are inserted into two holes of the leather head to be compressed, and then the core is put into a shell and sealed to be assembled into a capacitor;
(5) aging: applying direct current voltage to repair the damaged oxide film on the surface of the aluminum foil;
(6) sleeving a sleeve: printing the type, specification and the like of the capacitor on a PVC sleeve, and sleeving the sleeve and a gasket on the capacitor;
(7) and (3) testing: measuring parameters (capacity, loss and leakage current) of the capacitor, and rejecting defective products;
(8) packaging: and (5) packaging the qualified product into a packaging box and packaging.
Comparative example 1
The aging protocol is shown in table 1.
Table 1 aging protocol for comparative example 1
1000 capacitor products with 330v500uf are used, 5 are broken down, the leakage current is increased by 995, and the qualification rate is 0%, wherein the parameters of the 8 products with relatively small leakage current are shown in table 2.
TABLE 2 product parameters obtained using the aging protocol of comparative example 1
Example 1
The aging protocol is shown in table 3.
Table 3 aging protocol for example 1
1000 capacitors are put into the capacitor product of 330v500uf, 2 capacitors are broken down, the leakage current is 5 capacitors, and the aging qualification rate is as follows: 99.3 percent. The parameters of 8 qualified products were recorded:
TABLE 4 product parameters obtained using the aging protocol of example 1
On the basis, after the second aging step is reduced, 1000 capacitors are put into the capacitor with 330v500uf, 4 capacitors are broken through, the leakage current is 870 capacitors, and the aging yield is as follows: 12.6 percent.
It will be understood by those skilled in the art that the foregoing is only exemplary of the present invention, and is not intended to limit the invention, which is intended to cover any variations, equivalents, or improvements therein, which fall within the spirit and scope of the invention.
Claims (10)
1. The aging method of the aluminum electrolytic capacitor is characterized by comprising four times of aging, wherein the first aging is boosted to a working voltage more than 1.05 times, the second aging voltage is not higher than 0.98 times, the third aging and the fourth aging are boosted to a working voltage more than 1.03 times, the first aging and the fourth aging are normal temperature aging, the second aging and the third aging are high temperature aging, the high temperature is 55-70 ℃, and the working voltage is the working voltage of the aluminum electrolytic capacitor.
2. The method for aging aluminum electrolytic capacitors as claimed in claim 1, wherein the second aging temperature is 68 ℃ to 72 ℃.
3. The method for aging aluminum electrolytic capacitors as claimed in claim 2, wherein the second aging temperature is 70 ℃.
4. The method for aging aluminum electrolytic capacitors as claimed in claim 1, wherein the third aging temperature is 53 ℃ to 57 ℃.
5. The method for aging aluminum electrolytic capacitors as claimed in claim 4, wherein the third aging temperature is 55 ℃.
6. The method for aging aluminum electrolytic capacitors as claimed in claim 1, wherein the first aging step is performed up to an operating voltage of 1.05 to 1.08 times.
7. The method for aging an aluminum electrolytic capacitor as recited in claim 1, wherein the second aging voltage is 0.95 to 0.98 times the operating voltage.
8. The method for aging aluminum electrolytic capacitors as claimed in claim 1, wherein the third and fourth aging steps are performed up to 1.03 to 1.05 times the operating voltage.
9. The method for aging the aluminum electrolytic capacitor according to claim 1, wherein the first aging is performed for 5.5h to 6.5h after increasing the operating voltage to 1.05 to 1.08 times, the second aging is performed for 1.5h to 2.5h after increasing the operating voltage to 0.95 to 0.98 times, the third aging is performed for 5.5h to 6.5h after increasing the operating voltage to 1.03 to 1.05 times, and the fourth aging is performed for 1.5h to 2.5h after increasing the operating voltage to 1.03 to 1.05 times.
10. The method for aging the aluminum electrolytic capacitor according to claim 9, wherein the first aging is performed for 6 hours after boosting to 1.05 to 1.08 times the operating voltage, the second aging is performed for 2 hours after 0.95 to 0.98 times the operating voltage, the third aging is performed for 6 hours after boosting to 1.03 to 1.05 times the operating voltage, and the fourth aging is performed for 2 hours after boosting to 1.03 to 1.05 times the operating voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911373312.6A CN110993352A (en) | 2019-12-27 | 2019-12-27 | Aging method of aluminum electrolytic capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911373312.6A CN110993352A (en) | 2019-12-27 | 2019-12-27 | Aging method of aluminum electrolytic capacitor |
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| Publication Number | Publication Date |
|---|---|
| CN110993352A true CN110993352A (en) | 2020-04-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911373312.6A Withdrawn CN110993352A (en) | 2019-12-27 | 2019-12-27 | Aging method of aluminum electrolytic capacitor |
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| Country | Link |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115274303A (en) * | 2022-08-30 | 2022-11-01 | 珠海格力新元电子有限公司 | Aging method and aging circuit of aluminum electrolytic capacitor and aluminum electrolytic capacitor |
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2019
- 2019-12-27 CN CN201911373312.6A patent/CN110993352A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115274303A (en) * | 2022-08-30 | 2022-11-01 | 珠海格力新元电子有限公司 | Aging method and aging circuit of aluminum electrolytic capacitor and aluminum electrolytic capacitor |
| CN115274303B (en) * | 2022-08-30 | 2024-04-19 | 珠海格力新元电子有限公司 | Aging method and aging circuit for aluminum electrolytic capacitor and aluminum electrolytic capacitor |
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Application publication date: 20200410 |