CN103280332A - Manufacturing method for solid electrolyte aluminum electrolytic capacitor suitable for alternating current circuit - Google Patents
Manufacturing method for solid electrolyte aluminum electrolytic capacitor suitable for alternating current circuit Download PDFInfo
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Abstract
The invention relates to a manufacturing method for a solid electrolyte aluminum electrolytic capacitor suitable for an alternating current circuit. The method comprises the steps: (1) connecting positive electrode formation aluminum foils with guide needles in a riveted mode; (2) picking two positive electrode formation aluminum foils connected with the guide needles in the riveted mode, placing a piece of electrolytic paper between the two positive electrode formation aluminum foils in a separating mode, and rolling into a core package; (3) immersing the core package into a formation solution, and carrying out formation and repairing processing on the two positive electrode formation aluminum foils at the same time; (4) carrying out carbonization treatment; (5) repeating the step (3) and the step (4) for 3-8 times; (6) placing the core package in a monomer and an oxidizing agent respectively to be impregnated and heated and polymerized to form a polymer electrolyte, packing the core package into an aluminum shell, and sealing an opening, wherein the impregnating method of the oxidizing agent sequentially comprises the steps of carrying out ordinary pressure impregnating for 0.1-10 minutes, carrying out vacuum impregnating for 0.1-10 minutes and carrying pressurization impregnating for 1-20 minutes; (7) carrying out ageing treatment, testing and sorting. The solid electrolyte aluminum electrolytic capacitor has the advantages of being low in series connection equivalent resistance, high-temperature-resistant, long in service life and the like.
Description
Technical field
The present invention relates to the aluminium electrolytic capacitor technical field, particularly a kind of manufacture method that is applicable to the solid electrolyte aluminium electrolytic capacitor of alternating current circuit.
Background technology
The liquid electrolytic capacitor that solid electrolytic capacitor is compared common, its electrical property is very outstanding, has that equivalent series resistance (ESR) is low, a height of anti-ripple current the, long service life, steady performance.
Existing solid electrolytic capacitor comprises aluminum hull, be arranged at core bag in the aluminum hull, be arranged on core bag top and the Jiao Gai that is tightly connected with aluminum hull, positive terminal, negative terminal.Usually, the core bag comprises and is anodizing to aluminium foil, Cathode Foil, is arranged on described electrolytic paper and the polymer dielectric that is anodizing between aluminium foil and the described Cathode Foil that described positive terminal and negative terminal sting riveting respectively in being anodizing on aluminium foil and the Cathode Foil.Constitute solid electrolytic capacitor be anodizing to paper tinsel normally with purity greater than 99.3% aluminium foil, through chemical corrosion, after increasing surface area, need to adopt certain voltage to change into more and make, therefore, be anodizing to paper tinsel and all have certain formation voltage, Cathode Foil does not then have formation voltage or formation voltage extremely low, and so, existing solid electrolytic capacitor all has polarity, and can not be applied in the alternating current circuit, this has greatly limited the use of solid capacitor in alternating current circuit.
Summary of the invention
Technical problem to be solved by this invention is to overcome the deficiencies in the prior art, and a kind of manufacture method of the solid electrolyte aluminium electrolyte capacitor applicable to alternating current circuit is provided.
For solving above technical problem, the present invention takes following technical scheme:
A kind of manufacture method that is applicable to the solid electrolyte aluminium electrolytic capacitor of alternating current circuit, capacitor comprises aluminum hull, be arranged at the core bag in the aluminum hull, the Jiao Gai that is arranged on core bag top and is tightly connected with aluminum hull, first splicing ear, second splicing ear, particularly, described core bag comprises first anode formed aluminum foil, the second plate formed aluminum foil and be arranged on first anode formed aluminum foil and the second plate formed aluminum foil between electrolytic paper and polymer dielectric, first anode formed aluminum foil, the second plate formed aluminum foil is riveted mutually with described first splicing ear and second splicing ear respectively, and described manufacture method comprises the steps:
(1), will be anodizing to the aluminium foil riveted joint and go up guide pin;
(2), get the aluminium foil that is anodizing to that two riveted joints have guide pin, with electrolytic paper, be wound into the core bag at middle interval, and fix with adhesive tape;
(3), the core bag immersed change in the liquid, be anodizing to aluminium foil to two simultaneously and change into repair process, the processing time is 5～30 minutes;
(4), the core bag is carried out carbonization treatment, 200 ℃～400 ℃ of temperature, carbonization time 10～30 minutes;
(5), repeat above-mentioned steps (3) and (4) 3～8 times;
(6), the core bag is put into monomer, oxidant respectively and carried out impregnation and heated polymerizable to form polymer dielectric, the aluminum hull of packing into, seal, get capacitor, wherein, the leaching method that contains to oxidant is the normal pressure impregnation of carrying out earlier 0.1～10 minute, carry out 0.1～10 minute vacuum impregnation again, carry out 1～20 minute pressurization impregnation again, wherein, the normal pressure impregnation refers to that with interior core bag direct impregnation for normal pressure in oxidant, vacuum impregnation refers to that earlier core bag inside being evacuated to vacuum degree is 70～100KPa, and then impregnated in the oxidant; The pressurization impregnation is that the inner feeding of sensing core bag compressed air to pressure is 2～6atm, and then impregnated in the oxidant;
(7), burin-in process and testing, sorting: 0.5 times, 1 times, 1.2 times the voltage that imposes rated voltage respectively to a utmost point of capacitor carries out burin-in process earlier, and then carries out burin-in process to 0.5 times, 1 times, 1.2 times the voltage that another utmost point of capacitor imposes rated voltage respectively.
Preferably, described core bag also comprises the electrolytic paper that is arranged on the Cathode Foil outside.
Preferably, described Jiao Gai selects exotic material for use, for example can be vulcanized butyl rubber or polyethylene terephthalate (PET).
Preferably, to be covered with thickness on the outer wall of described aluminum hull be the insulating barrier of 5 μ m～50 μ m or be coated with polyethylene terephthalate (PET) or the sebific duct of polyethylene (PE) material.The material of described insulating barrier can be for example terylene, epoxy resin or polyethylene (PE) resin.
Preferably, between described first anode formed aluminum foil and the second plate formed aluminum foil and be full of described polymer dielectric in the electrolytic paper.In other words, described polymer dielectric be present between described first anode formed aluminum foil and the second plate formed aluminum foil and be present on the electrolytic paper and in.
According to a concrete aspect of the present invention: in the step (3), two guide pins that core is wrapped are welded on the iron bar, and make and change into liquid and just flood the core bag, the formation voltage that applies is the withstand voltage Vf-10V that is anodizing to aluminium foil～the be anodizing to withstand voltage Vf+10V of aluminium foil.Preferably, in the step (3), the formation voltage that applies is the withstand voltage Vf-5V that is anodizing to aluminium foil～the be anodizing to withstand voltage Vf+5V of aluminium foil.More preferably, the formation voltage that applies is the withstand voltage Vf that is anodizing to aluminium foil.
Further, in the step (6), when carrying out the monomer impregnation, the core bag of at least 1/3 height is under the dipping liquid level, the monomer impregnation time is 0.1～10 minute.More preferably, the core bag of at least 1/2 height is under the dipping liquid level.Also more preferably, the core bag of at least 2/3 height is under the dipping liquid level.
Usually, in the step (6), when carrying out the oxidant impregnation, the core bag of at least 1/3 height is under the dipping liquid level.Preferably, the core bag of at least 1/2 height is under the dipping liquid level.More preferably, the core bag of at least 2/3 height is under the dipping liquid level.
Preferably, in the step (6), described heated polymerizable is taked the two-part polymerization methods: at first carry out low temperature polymerization under 20 ℃～60 ℃ of temperature, the low temperature polymerization time is 2～24 hours; Carry out high temperature polymerization then under 120 ℃～250 ℃ of temperature, polymerization time is 0.5～4 hour.More preferably, the temperature of described low temperature polymerization is 40 ℃～60 ℃; The temperature of described high temperature polymerization is 140～180 ℃.
Preferably, in the step (7), the temperature of described burin-in process is 85 ℃～150 ℃, and ageing time is 30～150 minutes.
Manufacturing method according to the invention is suitable for full-scale electric capacity.As a preferred aspect of the present invention, capacitor is that diameter is more than the 10mm, highly is the above product of 12mm.
Because the employing of technique scheme, the present invention compared with prior art has the following advantages:
Solid capacitor provided by the invention is the bipolarity aluminium electrolytic capacitor, can be applicable in the alternating current circuit, has advantages such as series equivalent resistance is low, high temperature resistant, long service life.
Manufacture method of the present invention can obtain to be suitable for the solid capacitor of alternating current circuit, and the high conformity of this method products obtained therefrom, the rate of finished products height.
Description of drawings
Fig. 1 is the structural representation according to solid electrolytic aluminum capacitor of the present invention;
Fig. 2 is the structural representation of Fig. 1 SMIS bag;
Wherein: 1, first splicing ear; 2, second splicing ear; 3, Jiao Gai; 4, aluminum hull; 5, core bag; 50, first anode formed aluminum foil; 51, second plate formed aluminum foil; 52, electrolytic paper; 6, insulating barrier.
Embodiment
Below in conjunction with accompanying drawing the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein only is used for description and interpretation the present invention, and be not used in restriction the present invention.
Embodiment 1
Consult Fig. 1 to Fig. 2, present embodiment provides a kind of solid electrolyte aluminium electrolytic capacitor that is applicable to alternating current circuit, and it comprises first splicing ear 1, second splicing ear 2, glue lid 3, aluminum hull 4 and core bag 5.Core bag 5 is made of first anode formed aluminum foil 50, second plate formed aluminum foil 51, electrolytic paper 52 and polymer dielectric.First splicing ear 1 is riveted in the upper end of first anode formed aluminum foil 50, and second splicing ear 2 is riveted in the upper end of second plate formed aluminum foil 51.In addition, being covered with thickness at the outer wall of aluminum hull 4 is that material about 25 μ m is the insulating barrier 6 of epoxy resin.
The solid electrolyte aluminium electrolytic capacitor of present embodiment can prepare as follows:
(1), will be anodizing to the aluminium foil riveted joint and go up guide pin;
(2), get the aluminium foil that is anodizing to that two riveted joints have guide pin, with electrolytic paper, be wound into the core bag at middle interval, and fix with adhesive tape;
(3), the core bag immersed change in the liquid, be anodizing to aluminium foil to two simultaneously and change into repair process, the processing time can be 5～30 minutes;
(4), the core bag is carried out carbonization treatment, 200 ℃～400 ℃ of temperature, carbonization time 10～30 minutes;
(5), repeat above-mentioned steps (3) and (4) 3～8 times;
(6), the core bag put into monomer, oxidant respectively carry out impregnation and heated polymerizable to form polymer dielectric, the aluminum hull of packing into seals, and gets capacitor;
(7), burin-in process and testing, sorting: elder generation carries out burin-in process to 0.5 times, 1 times, 1.2 times the voltage that a utmost point of capacitor imposes rated voltage respectively, and then carry out burin-in process to 0.5 times, 1 times, 1.2 times the voltage that another utmost point of capacitor imposes rated voltage respectively, the temperature of burin-in process is 85 ℃～150 ℃, and ageing time is 30～150 minutes.
Embodiment 2
Present embodiment provides a kind of manufacture method of 4V1200 μ F13*16.5mm shell capacitor product, and the structure of this capacitor product is with embodiment 1, and described method specifically comprises the steps:
(1), to adopt formation voltage be the aluminium foil that is anodizing to of 7.7V, and is being anodizing to guide pin in the aluminium foil riveted joint;
(2), get the aluminium foil that is anodizing to that two riveted joints have guide pin, with electrolytic paper, being wound into theoretical capacity is the core bag of 1800 μ F, and fixes with adhesive tape at middle interval;
(3), two guide pins of core bag are welded on the iron bar, immerse and change in the liquid, make to change into liquid and just flood the core bag, apply the formation voltage of 7.7V, be anodizing to aluminium foil to two simultaneously and change into repair process, the processing time is 10 minutes;
(4), the core bag is carried out carbonization treatment, 300 ± 10 ℃ of temperature, carbonization time 20 minutes;
(5), repeat above-mentioned steps (3) and (4) 4 times;
(6), the core bag put into monomer respectively carry out impregnation, during impregnation, the whole of core bag are in below the impregnation liquid level, the impregnation time is 2 minutes, after finishing, desolventizing;
(7), the core bag is put into oxidant and carry out impregnation, during impregnation, at least 2/3 of core bag is in below the impregnation liquid level, containing leaching method and being is earlier that the core of normal pressure comprises and was dipped in the oxidant 2 minutes with inside, break away from oxidant again, be evacuated to below the vacuum degree 90KPa, contain and be dipped in the oxidant, keep 2min, time to after exit in normal pressure, and to feed compressed air to pressure be 3atm, contains atm and be dipped in the oxidant 5 minutes, and the time is to finishing impregnation;
(8), the good core bag of impregnation is carried out the two-part polymerization:
At first, low temperature polymerization, 50 ℃ ± 10 ℃ of polymerization temperatures, polymerization time 200 ± 10 minutes;
Secondly, high temperature polymerization, 150 ℃ ± 10 ℃ of polymerization temperatures, polymerization time 100 ± 10 minutes;
(9), core is packaged into the aluminum hull that is of a size of 13*16.8mm, seal with the 12.6*4.0mm rubber cap, get capacitor;
(10), segmented burin-in process and sorting test:
Two utmost points to capacitor carry out burin-in process respectively: apply 20 minutes with 2V voltage, apply 20 minutes with 4V voltage again, apply 40 minutes with 4.8V voltage at last and carry out burin-in process, 125 ± 10 ℃ of aging temperatures.The aging extraction 10PCS that finishes tests.The result is referring to table 1.
Table 1
Embodiment 3
Present embodiment provides a kind of manufacture method of 10V2200 μ F16*25mm shell capacitor product, and the structure of this capacitor product is with embodiment 1, and described method specifically comprises the steps:
(1), to adopt formation voltage be the aluminium foil that is anodizing to of 21V, and is being anodizing to guide pin in the aluminium foil riveted joint;
(2), get the aluminium foil that is anodizing to that two riveted joints have guide pin, with electrolytic paper, being wound into theoretical capacity is the core bag of 2700 μ F, and fixes with adhesive tape at middle interval;
(3), two guide pins of core bag are welded on the iron bar, immerse and change in the liquid, make to change into liquid and just flood the core bag, apply the formation voltage of 21V, be anodizing to aluminium foil to two simultaneously and change into repair process, the processing time is 10 minutes;
(4), the core bag is carried out carbonization treatment, 300 ± 10 ℃ of temperature, carbonization time 20 minutes;
(5), repeat above-mentioned steps (3) and (4) 4 times;
(6), the core bag put into monomer respectively carry out impregnation, during impregnation, at least 2/3 of core bag is in below the impregnation liquid level, the impregnation time is 3 minutes, after finishing, desolventizing;
(7), the core bag is put into oxidant and carry out impregnation, during impregnation, the whole of core bag are in below the impregnation liquid level, containing leaching method and being is earlier that the core of normal pressure comprises and was dipped in the oxidant 2 minutes with inside, break away from oxidant again, be evacuated to below the vacuum degree 90KPa, contain and be dipped in the oxidant, keep 2min, time to after exit in normal pressure, and to feed compressed air to pressure be 3atm, contains to be dipped in the oxidant 5 minutes, and the time is to finishing impregnation;
(8), the good core bag of impregnation is carried out the two-part polymerization:
At first, low temperature polymerization, 50 ℃ ± 10 ℃ of polymerization temperatures, polymerization time 200 ± 10 minutes;
Secondly, high temperature polymerization, 150 ℃ ± 10 ℃ of polymerization temperatures, polymerization time 100 ± 10 minutes;
(9), core is packaged into the aluminum hull that is of a size of 16*25.3mm, seal with the 15.6*6.0mm rubber cap, get capacitor;
(10), segmented burin-in process and sorting test:
Two utmost points to capacitor carry out burin-in process respectively: apply 20 minutes with 5V voltage, apply 20 minutes with 10V voltage again, apply 40 minutes with 12V voltage at last and carry out burin-in process, 125 ± 10 ℃ of aging temperatures.The aging extraction 10PCS that finishes tests.The result is referring to table 2.
Table 2
Embodiment 4
Present embodiment provides a kind of manufacture method of 16V3300 μ F18*36.5mm shell capacitor product, and the structure of this capacitor product is with embodiment 1, and described method specifically comprises the steps:
(1), to adopt formation voltage be the aluminium foil that is anodizing to of 32V, and is being anodizing to guide pin in the aluminium foil riveted joint;
(2), get the aluminium foil that is anodizing to that two riveted joints have guide pin, with electrolytic paper, being wound into theoretical capacity is the core bag of 3700 μ F, and fixes with adhesive tape at middle interval;
(3), two guide pins of core bag are welded on the iron bar, immerse and change in the liquid, make to change into liquid and just flood the core bag, apply the formation voltage of 32V, be anodizing to aluminium foil to two simultaneously and change into repair process, the processing time is 10 minutes;
(4), the core bag is carried out carbonization treatment, 300 ± 10 ℃ of temperature, carbonization time 20 minutes;
(5), repeat above-mentioned steps (3) and (4) 4 times;
(6), the core bag put into monomer respectively carry out impregnation, during impregnation, at least 2/3 of core bag is in below the impregnation liquid level, the impregnation time is 6 minutes, after finishing, desolventizing;
(7), the core bag is put into oxidant and carry out impregnation, during impregnation, the whole of core bag are in below the impregnation liquid level, and containing leaching method and being is earlier that the core of normal pressure comprises and was dipped in the oxidant 2 minutes with inside, breaks away from oxidant again, be evacuated to below the vacuum degree 90KPa, kept 2 minutes, the time to after exit in normal pressure, and to feed compressed air to pressure be 3atm, contain and be dipped in the oxidant 5 minutes, the time is to finishing impregnation;
(8), the good core bag of impregnation is carried out the two-part polymerization:
At first, low temperature polymerization, 50 ℃ ± 10 ℃ of polymerization temperatures, polymerization time 200 ± 10 minutes;
Secondly, high temperature polymerization, 150 ℃ ± 10 ℃ of polymerization temperatures, polymerization time 100 ± 10 minutes;
(9), core is packaged into the aluminum hull that is of a size of 18*36.8mm, seal with the 17.6*9.0mm rubber cap, get capacitor;
(8), segmented burin-in process and sorting test:
Two utmost points to capacitor carry out burin-in process respectively: apply 20 minutes with 8V voltage, apply 20 minutes with 16V voltage again, apply 40 minutes with 19.2V voltage at last and carry out burin-in process, 125 ± 10 ℃ of aging temperatures.The aging extraction 10PCS that finishes tests.The result is referring to table 3.
Table 3
It should be noted that at last: above only is the preferred embodiments of the present invention; be not limited to the present invention; although the present invention has been described in detail with reference to embodiment; for a person skilled in the art; it still can be made amendment to the technical scheme that aforementioned each embodiment puts down in writing; perhaps part technical characterictic wherein is equal to replacement; in every case within the spirit and principles in the present invention; any modification of doing, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. manufacture method that is applicable to the solid electrolyte aluminium electrolytic capacitor of alternating current circuit, described capacitor comprises aluminum hull, be arranged at the core bag in the described aluminum hull, the Jiao Gai that is arranged on described core bag top and is tightly connected with described aluminum hull, first splicing ear, second splicing ear, it is characterized in that: described core bag comprises first anode formed aluminum foil, second plate formed aluminum foil and be arranged on electrolytic paper and polymer dielectric between described first anode formed aluminum foil and the second plate formed aluminum foil, described first anode formed aluminum foil, the second plate formed aluminum foil is riveted mutually with described first splicing ear and second splicing ear respectively, and described manufacture method comprises the steps:
(1), will be anodizing to the aluminium foil riveted joint and go up guide pin;
(2), get the aluminium foil that is anodizing to that two riveted joints have guide pin, with electrolytic paper, be wound into the core bag at middle interval, and fix with adhesive tape;
(3), the core bag immersed change in the liquid, be anodizing to aluminium foil to two simultaneously and change into repair process, the processing time is 5 ~ 30 minutes;
(4), the core bag is carried out carbonization treatment, 200 ℃ ~ 400 ℃ of temperature, carbonization time 10 ~ 30 minutes;
(5), repeat above-mentioned steps (3) and (4) 3 ~ 8 times;
(6), the core bag is put into monomer, oxidant respectively and carried out impregnation and heated polymerizable to form polymer dielectric, the aluminum hull of packing into, seal, get capacitor, wherein, the leaching method that contains to oxidant is the normal pressure impregnation of carrying out earlier 0.1 ~ 10 minute, carry out 0.1 ~ 10 minute vacuum impregnation again, carry out 1 ~ 20 minute pressurization impregnation again, wherein, described normal pressure impregnation refers to that with interior core bag direct impregnation for normal pressure in oxidant, described vacuum impregnation refers to that earlier core bag inside being evacuated to vacuum degree is 70 ~ 100KPa, and then impregnated in the oxidant; Described pressurization impregnation is that the inner feeding of sensing core bag compressed air to pressure is 2 ~ 6atm, and then impregnated in the oxidant;
(7), burin-in process and testing, sorting: 0.5 times, 1 times, 1.2 times the voltage that imposes rated voltage respectively to a utmost point of capacitor carries out burin-in process earlier, and then carries out burin-in process to 0.5 times, 1 times, 1.2 times the voltage that another utmost point of capacitor imposes rated voltage respectively.
2. manufacture method according to claim 1, it is characterized in that: in the step (3), two guide pins that core is wrapped are welded on the iron bar, and make and change into liquid and just flood the core bag, the formation voltage that applies is the withstand voltage Vf-10V that is anodizing to aluminium foil～the be anodizing to withstand voltage Vf+10V of aluminium foil.
3. manufacture method according to claim 2 is characterized in that: in the step (3), the formation voltage that applies is the withstand voltage Vf-5V that is anodizing to aluminium foil～the be anodizing to withstand voltage Vf+5V of aluminium foil.
4. manufacture method according to claim 3, it is characterized in that: in the step (3), the formation voltage that applies is the withstand voltage Vf that is anodizing to aluminium foil.
5. manufacture method according to claim 1 is characterized in that: in the step (6), when carrying out the monomer impregnation, the core bag of at least 1/3 height is under the dipping liquid level, the monomer impregnation time is 0.1 ~ 10 minute.
6. manufacture method according to claim 1 is characterized in that: in the step (6), when carrying out the oxidant impregnation, the core bag of 1/3 height is under the dipping liquid level at least.
7. manufacture method according to claim 6 is characterized in that: in the step (6), when carrying out the oxidant impregnation, the core bag of 1/2 height is under the dipping liquid level at least.
8. manufacture method according to claim 1, it is characterized in that: in the step (6), described heated polymerizable is taked the two-part polymerization methods: at first carry out low temperature polymerization under 20 ℃ ~ 60 ℃ of temperature, the low temperature polymerization time is 2 ~ 24 hours; Carry out high temperature polymerization then under 120 ℃ ~ 250 ℃ of temperature, polymerization time is 0.5 ~ 4 hour.
9. manufacture method according to claim 1, it is characterized in that: in the step (7), the temperature of described burin-in process is 85 ℃ ~ 150 ℃, and ageing time is 30 ~ 150 minutes, after the burin-in process, carries out testing, sorting.
10. according to the described manufacture method of each claim in the claim 1 to 9, it is characterized in that: the diameter of described capacitor is more than the 10mm, highly is more than the 12mm.
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| CN107331517A (en) * | 2017-08-11 | 2017-11-07 | 佛山市三水日明电子有限公司 | The manufacturing process of solid electrolyte/aluminum electrolytic capacitor |
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Denomination of invention: Manufacturing method for solid electrolyte aluminum electrolytic capacitor suitable for alternating current circuit Effective date of registration: 20170412 Granted publication date: 20160413 Pledgee: Guangdong Nanhai Rural Commercial Bank branch branch of Limited by Share Ltd Pledgor: Foshan Sanshui Riming Electroncs Co., Ltd. Registration number: 2017990000303 |
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