CN103268821A - Solid electrolyte aluminum electrolytic capacitor and manufacturing method thereof - Google Patents
Solid electrolyte aluminum electrolytic capacitor and manufacturing method thereof Download PDFInfo
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Abstract
The invention relates to a solid electrolyte aluminum electrolytic capacitor and a manufacturing method thereof. The solid electrolyte aluminum electrolytic capacitor comprises an aluminum shell, a core bag, a rubber cover, a positive terminal and a negative terminal, wherein the core bag is installed in the aluminum shell, and the rubber cover is installed at the top of the core bag and is connected with the aluminum shell in a sealed mode. The core bag comprises formed anode aluminum foil, cathode foil, electrolytic paper and polymer electrolyte, wherein the electrolytic paper and the polymer electrolyte are installed between the formed anode aluminum foil and the cathode foil. The positive terminal is located at one end of the core bag and is connected to the formed anode aluminum foil in a riveted mode, particularly, the negative terminal is connected with the bottom of the aluminum shell, a negative-electrode conducting strip is installed on one end portion, opposite to the end where the positive terminal is located, of the core bag, and the negative-electrode conducting strip is connected with the cathode foil and the aluminum shell in a welded mode. The solid electrolyte aluminum electrolytic capacitor can be installed in a horizontal mode, therefore, the installation height is reduced, the length of a product can be shortened, miniaturization of the product is achieved, series equivalence can be reduced, and ripple wave resisting capability of the product is enhanced.
Description
Technical field
The present invention relates to technical field of electrolytic, particularly a kind of solid electrolyte/aluminum electrolytic capacitor and manufacture method thereof.
Background technology
The liquid electrolytic capacitor that solid electrolytic capacitor is compared common, its electrical property is very outstanding, has that low, the anti-ripple current of equivalent series resistance (ESR) is high, a long service life, steady performance.Continuous upgrading along with electronic product, improving constantly of its function and performance, high frequency characteristics to capacitor requires also more and more higher, people make different mounting meanss and realize different installation requirements, simultaneously also by also reducing by all means the equivalent series resistance of solid electrolytic capacitor, to meet the high frequency characteristics of capacitor.
In prior art, the tactic pattern that the solid electrolytic capacitor industry is general mainly contains two kinds, the first: positive and negative paper tinsel and positive and negative guide pin link, and at same end, put on after Jiao Gai and make electric capacity after encapsulation; Another kind of way is: positive and negative paper tinsel and positive and negative guide pin are linked, and two guide pins are placed in respectively core bag two ends, and Jiao Gai is loaded onto respectively at two ends, are loaded on after aluminum hull seals and make electric capacity.Before a kind of version be a kind of form that industry generally adopts, can meet the application of most of occasion, but for requirement for height lower occasion, be difficult to meet the demands.Rear a kind of version, terminal is drawn from two ends, and the mounting means of electric capacity is to crouch on installed surface, highly lower, has well adapted to the low mounting means of requirement for height.But there are two defects in this structure, the one, two ends seal with Jiao Gai, for reaching certain sealing effectiveness, the thickness of Jiao Gai has certain requirement, and two Jiao Gai for two ends have increased the length of electric capacity, reduced the capacity of unit volume, another defect is that series equivalent resistance is higher.
Summary of the invention
Technical problem to be solved by this invention is to overcome the deficiencies in the prior art, provide a kind of improved solid electrolyte/aluminum electrolytic capacitor with when realizing that thereby horizontal installation reduces setting height(from bottom), reduce the series equivalent resistance and the length that reduces capacitor of capacitor.
The present invention also will provide a kind of manufacture method of solid electrolyte/aluminum electrolytic capacitor simultaneously, thereby the method gained solid electrolyte/aluminum electrolytic capacitor can be realized horizontal installation reduction setting height(from bottom), and series equivalent resistance is less, and the length of capacitor is shorter.
For solving above technical problem, a kind of technical scheme that the present invention takes is:
A kind of solid electrolyte/aluminum electrolytic capacitor, it comprises aluminum hull, be arranged at the core bag in aluminum hull, the Jiao Gai that is arranged on core bag top and is tightly connected with described aluminum hull, positive terminal, negative terminal, described core bag comprises and is anodizing to aluminium foil, Cathode Foil, be arranged on the electrolytic paper and the polymer dielectric that are anodizing between aluminium foil and Cathode Foil, positive terminal is positioned at an end of core bag and is riveted on described being anodizing on aluminium foil, particularly, described negative terminal is connected with the bottom of aluminum hull, be provided with cathode conductive film on the end relative with positive terminal place end of core bag, this cathode conductive film welds mutually with Cathode Foil and aluminum hull.
Preferably, in the core bag, Cathode Foil exceeds and is anodizing to paper tinsel and electrolytic paper and exposes the part the exposed welding of cathode conductive film and Cathode Foil.
Further preferably, the width of electrolytic paper is greater than the width that is anodizing to paper tinsel.
Preferably, described core bag also comprises the electrolytic paper that is arranged on the Cathode Foil outside.
Preferably, between described cathode conductive film and Cathode Foil, be welded as Laser Welding, between cathode conductive film and aluminum hull, be welded as ultrasonic bond or Laser Welding.
Preferably, described Jiao Gai selects exotic material, can be for example vulcanized butyl rubber or polyethylene terephthalate (PET).
Preferably, be covered with the insulating barrier that thickness is 5 μ m～50 μ m on the outer wall of described aluminum hull 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, describedly be anodizing between aluminium foil and Cathode Foil and be full of described polymer dielectric in electrolytic paper.In other words, described polymer dielectric be present in described be anodizing between aluminium foil and Cathode Foil and be present on electrolytic paper and in.
The another technical scheme that the present invention takes is: a kind of manufacture method of solid electrolyte/aluminum electrolytic capacitor, it comprises the following steps:
(1) positive terminal is connected on an end that is anodizing to aluminium foil, then get involved electrolytic paper being anodizing between aluminium foil and Cathode Foil, be wound into the core bag, wherein, the width of described Cathode Foil is greater than the described paper tinsel that is anodizing to, make the Cathode Foil described in gained core bag exceed to be anodizing to paper tinsel and electrolytic paper and expose, the core bag of coiling is with fixing around clinging with adhesive tape ring;
(2), step (1) gained core bag is immersed in forming liquid and changed into repair process, the described repair process mode that changes into is for directly being sandwiched in folder, or is welded in iron bar, and fixture or iron bar are as positive pole, forming liquid is as negative pole, and the formation voltage of anode foils gets final product in addition;
(3), the mode by impregnation makes through forming polymer dielectric in the core bag of step (2);
(4), the polymer dielectric on the surface of the Cathode Foil that exposes is removed, with laser, cathode conductive film is welded on the part exposed of Cathode Foil;
(5), at the core through step (4), wrap and install Jiao Gai,, in the aluminum hull of packing into, with ultrasonic bond or laser, cathode conductive film and aluminum hull are welded;
(6), form sealing that aluminum hull and Jiao Gai are sealed by rolling, obtain described solid electrolyte/aluminum electrolytic capacitor.
Further, described manufacture method also is included in step (6) afterwards, the gained solid electrolyte/aluminum electrolytic capacitor is carried out to the step of high temperature ageing and testing, sorting successively, wherein, the high temperature ageing condition is as follows: ambient temperature is controlled between 85 ℃～200 ℃, apply voltage and be respectively 20%, 80%, 100% and 120% operating voltage, ageing time is 10～240 minutes.
Manufacturing method according to the invention, the forming liquid that wherein related repair process adopts, in step (3), the concrete mode of related formation polymer dielectric all can be implemented with reference to prior art, is not particularly limited.
According to the present invention, step (2) afterwards step (3) before, can carry out carbonization treatment if necessary.
In step (3), its operate to realize described be anodizing between aluminium foil and Cathode Foil and be full of polymer dielectric in electrolytic paper be advisable.
The method according to this invention, wherein, Jiao Gai preferably adopts exotic material, can be for example vulcanized butyl rubber or polyethylene terephthalate (PET).
Preferably, described method also is included on the outer wall of aluminum hull and covers the insulating barrier that thickness is 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.
Due to the employing of technique scheme, the present invention compared with prior art has the following advantages:
1, the mode of the positive and negative electrode of electric capacity is drawn at the two ends that capacitor of the present invention adopts, and has reduced setting height(from bottom), has adapted to specific (special) requirements the requirement to height is installed, and has realized horizontal installation when electric capacity is used;
2, the present invention is cathode conductive film and Cathode Foil and aluminum hull welding, and connects negative pole on aluminum hull, takes the benefit of this structure to be: on the one hand, owing to only having used a Jiao Gai, to shorten the length of product, realized the miniaturization of product; On the other hand, Cathode Foil and cathode conductive film welding, reduced the resistance between Cathode Foil and negative terminal, greatly reduces the series equivalent resistance of product, improved the ability of the anti-ripple of product.
The accompanying drawing explanation
Fig. 1 is the structural representation according to solid electrolytic aluminum capacitor of the present invention;
Fig. 2 is the structural representation according to the core bag of solid electrolytic aluminum capacitor of the present invention;
Wherein: 1, positive terminal; 2, negative terminal; 3, Jiao Gai; 4, aluminum hull; 5, cathode conductive film; 6, insulating barrier.7, core bag; 71, be anodizing to aluminium foil; 72, Cathode Foil; 73, electrode paper; 74, polymer dielectric.
Embodiment
The present invention is intended to be improved by the structure to capacitor, to realize the horizontal installation of capacitor product, reduces setting height(from bottom), shortens product length, realizes the miniaturization of product and the series connection equivalence (ESR) that reduces product, improves the anti-ripple ability of product.
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein, only for description and interpretation the present invention, is not intended to limit the present invention.
Embodiment 1
Consult Fig. 1 to Fig. 2, the present embodiment provides a kind of copolymer solid electrolyte aluminium electrolytic capacitor, and specification is 25V820 μ F, and production quantity is 300, and it comprises positive terminal 1, negative terminal 2, glue lid 3, aluminum hull 4, cathode conductive film 5 and core bag 7.Core bag 7 forms by being anodizing to aluminium foil 71, Cathode Foil 72, electrolytic paper 73 and polymer dielectric 74.Core bag 7 upper ends connect positive terminal 1, and the bottom of core bag 7 connects cathode conductive film 5.Glue lid 3 and aluminum hull 4 are separately positioned on top and the surrounding of core bag 7, and aluminum hull 4 is connected with cathode conductive film 5, and aluminum hull 4 bottoms connect negative terminal 2, the outer insulating barrier 6 that is coated with of aluminum hull 4.
The manufacture method of copolymer solid electrolyte aluminium electrolytic capacitor comprises the following step carried out successively:
(1), choose Waste Acid From Hua Cheng Foil that formation voltage is 51V as being anodizing to aluminium foil, cutting width is 17mm; The width that cuts of electrolytic paper is 19mm; Choose suitable Cathode Foil, cutting width is 19mm.
(2), by nail volume machine, the positive terminal riveting is being anodizing on aluminium foil and Cathode Foil, in the two therebetween, with electrolytic paper, with following closely the volume machine, be wound into the core bag.Between the electrolytic paper be anodizing between aluminium foil and Cathode Foil, two paper tinsels are kept apart, do not form short circuit, Cathode Foil is stretched out the outer 1mm of electrolytic paper, and after reeling, Cathode Foil encases the core bag, and outside is fastened with adhesive tape.
(3), the core bag of winding is delivered in battery formation clamp by changing into machine, put into the forming liquid dipping 10 minutes, formation voltage is 50V, and forming liquid is the ammonium adipate forming liquid, changes into 25 minutes, and the oxidation film layer on antianode formed aluminum foil surface is repaired.
(4) in the high temperature oven that, the core bag is put in the container that stainless steel makes, to be put in temperature be 270 ℃, carry out carbonization treatment.
(5), polymerization single polymerization monomer and oxidant are impregnated in respectively in the core bag, carry out polymerization reaction, thereby generate copolymer solid electrolyte being anodizing between aluminium foil and Cathode Foil and in electrolytic paper.
(6), the polymer on the Cathode Foil surface of exposing is removed, and with laser, cathode conductive film and Cathode Foil are welded;
(7), core is packed to gluing lid, outer being provided with in the aluminum hull of insulating barrier (PE resin) of packing into, weld cathode conductive film and aluminum hull with ultrasonic bond.
(8), form sealing that aluminum hull and Jiao Gai are sealed by rolling, obtain the copolymer solid electrolyte aluminium electrolytic capacitor product.
Product is put into to the baking oven that temperature is controlled at 125 ℃, apply respectively 5V, the voltage of 20V, 25V and 30V, the time is made as respectively 30 minutes, 30 minutes, 30 minutes and 60 minutes, carries out agingly, after aging complete reply 2 is little, tested.
After the number that manufactures a finished product is 300 sortings, large 2 of loss wherein, leakage current is large 3, totally 5 bad devices, the test yields is 98.33%.
Table 1 has shown the measured value of the capacitance of this routine 25V820 μ F product (optional 10) under the 120Hz frequency, loss, the ESR under the 100KHz frequency, applies the leakage current of 25V voltage measurement.
Table 1
| Sequence number | Capacity (uf) | Loss (100%) | ESR(mΩ) | Leakage current (uA/1 minute) |
| Specification | 656～984 | 6% | 8 | 2050 |
| 1 | 826.0 | 2.23 | 6.6 | 21 |
| 2 | 820.3 | 2.54 | 6.5 | 22 |
| 3 | 827.0 | 2.34 | 6.4 | 32 |
| 4 | 820.5 | 2.34 | 6.5 | 42 |
| 5 | 820.6 | 2.43 | 6.5 | 22 |
| 6 | 827.3 | 2.54 | 6.7 | 25 |
| 7 | 825.4 | 2.32 | 6.7 | 35 |
| 8 | 825.0 | 2.31 | 6.5 | 23 |
| 9 | 820.1 | 2.45 | 6.5 | 36 |
| 10 | 826.4 | 2.52 | 6.4 | 44 |
| Maximum | 827.3 | 2.54 | 6.7 | 44.0 |
| Minimum value | 820.1 | 2.23 | 6.4 | 21.0 |
| Mean value | 823.9 | 2.40 | 6.5 | 30.2 |
The present embodiment provides the copolymer solid electrolyte aluminium electrolytic capacitor that a kind of specification is 50V220 μ F, and specification is 50V220 μ F, and its basic structure is with embodiment 1.Different, the manufacture method of this capacitor is as follows:
(1), choose Waste Acid From Hua Cheng Foil that formation voltage is 105V as being anodizing to aluminium foil, cutting width is 12mm; The width that cuts of electrolytic paper is 14mm; Choose suitable Cathode Foil, cutting width is 14mm.
(2), by nail volume machine, positive terminal 1 riveting is being anodizing on aluminium foil and Cathode Foil, in the two therebetween, with electrolytic paper, with following closely the volume machine, be wound into the core bag.Electrolytic paper is kept apart two paper tinsels between being anodizing between aluminium foil and Cathode Foil, does not form short circuit, and Cathode Foil is stretched out the outer 1mm of electrolytic paper, and after reeling, Cathode Foil encases the core bag, and outside is fastened with adhesive tape.
(3), the core bag of winding is delivered in battery formation clamp by changing into machine, put into the forming liquid dipping 10 minutes, formation voltage is 100V, and forming liquid is the ammonium adipate forming liquid, changes into 25 minutes, and the oxidation film layer on antianode formed aluminum foil surface is repaired.
(4) carrying out drying in the baking oven that, the core bag is put in the container that stainless steel makes, to be put in temperature be 125 ℃ processes.
(5), polymerization single polymerization monomer is mixed and is scattered in water with oxidant, be impregnated in the core bag, and dry the processing, thereby generate copolymer solid electrolyte being anodizing between aluminium foil and Cathode Foil and in electrolytic paper.
(6), the polymer on the Cathode Foil surface of exposing is removed, and with laser, cathode conductive film and Cathode Foil are welded;
(7), core is packed to gluing lid, pack into and be coated with in the aluminum hull of PET sebific duct, with ultrasonic bond, cathode conductive film and aluminum hull are welded.
(8), form sealing that aluminum hull and Jiao Gai are sealed by rolling, obtain the copolymer solid electrolyte aluminium electrolytic capacitor product.
Product is put into to the baking oven that temperature is controlled at 125 ℃, apply respectively 10V, the voltage of 40V, 50V and 60V, the time is made as respectively 30 minutes, 30 minutes, 30 minutes and 60 minutes, carries out agingly, after aging complete reply 2 is little, tested.
Wherein manufacture a finished product number for after the 300PCS sorting, large 4 of loss wherein, leakage current is large 3, totally 7 bad, yields is 97.66%.
The measured value that table 2 is the capacitance of this routine 50V220 μ F product (optional 10) under the 120Hz frequency, loss, the ESR under the 100KHz frequency, apply the leakage current of 50V voltage measurement.
Table 2
| Sequence number | Capacity (uf) | Loss (100%) | ESR(mΩ) | Leakage current (uA/1 minute) |
| Specification | 176～264 | 6% | 8 | 1100 |
| 1 | 226.3 | 2.78 | 7.9 | 31 |
| 2 | 220.3 | 2.67 | 7.8 | 33 |
| 3 | 227.1 | 2.77 | 7.7 | 31 |
| 4 | 220.3 | 2.68 | 7.9 | 43 |
| 5 | 220.6 | 2.56 | 8.0 | 32 |
| 6 | 227.2 | 2.68 | 7.7 | 35 |
| 7 | 225.1 | 2.53 | 7.8 | 25 |
| 8 | 225.4 | 2.65 | 7.9 | 23 |
| 9 | 220.3 | 2.68 | 7.9 | 38 |
| 10 | 226.4 | 2.65 | 7.7 | 46 |
| Maximum | 227.2 | 2.78 | 8.0 | 46.0 |
| Minimum value | 220.3 | 2.53 | 7.7 | 23.0 |
| Mean value | 223.9 | 2.67 | 7.8 | 33.7 |
Finally it should be noted that: these are only the preferred embodiments of the present invention; be not limited to the present invention; although with reference to embodiment, the present invention is had been described in detail; for a person skilled in the art; its technical scheme that still can put down in writing aforementioned each embodiment is modified; 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., within protection scope of the present invention all should be included in.
Above-described embodiment is only explanation technical conceive of the present invention and characteristics; its purpose is to allow the person skilled in the art can understand content of the present invention and implement according to this; can not limit the scope of the invention with this; all equivalences that Spirit Essence is done according to the present invention change or modify, within all should being encompassed in protection scope of the present invention.
Claims (10)
1. a solid electrolyte/aluminum electrolytic capacitor, it comprises aluminum hull, be arranged at the core bag in described aluminum hull, the Jiao Gai that is arranged on described core bag top and is tightly connected with described aluminum hull, positive terminal, negative terminal, described core bag comprises and is anodizing to aluminium foil, Cathode Foil, be arranged on described electrolytic paper and the polymer dielectric be anodizing between aluminium foil and described Cathode Foil, described positive terminal is positioned at an end of described core bag and is riveted on described being anodizing on aluminium foil, it is characterized in that: described negative terminal is connected with the bottom of described aluminum hull, be provided with cathode conductive film on the end relative with described positive terminal place end of described core bag, this described cathode conductive film welds mutually with described Cathode Foil and aluminum hull.
2. solid electrolyte/aluminum electrolytic capacitor according to claim 1, it is characterized in that: the Cathode Foil described in described core bag exceeds and is anodizing to paper tinsel and electrolytic paper and exposes the described part welding exposed of described cathode conductive film and described Cathode Foil.
3. solid electrolyte/aluminum electrolytic capacitor according to claim 2, it is characterized in that: the width of described electrolytic paper is greater than the described width that is anodizing to paper tinsel.
4. solid electrolyte/aluminum electrolytic capacitor according to claim 1 is characterized in that: be welded as Laser Welding between described cathode conductive film and described Cathode Foil, between described cathode conductive film and described aluminum hull, be welded as ultrasonic bond or Laser Welding.
5. solid electrolyte/aluminum electrolytic capacitor according to claim 1, it is characterized in that: the material of described Jiao Gai is vulcanized butyl rubber or polyethylene terephthalate.
6. solid electrolyte/aluminum electrolytic capacitor according to claim 1 is characterized in that: 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 the polyethylene terephthalate material or the sebific duct of polyethylene material.
7. solid electrolyte/aluminum electrolytic capacitor according to claim 6, it is characterized in that: the material of described insulating barrier is terylene, epoxy resin or polyvinyl resin.
8. solid electrolyte/aluminum electrolytic capacitor according to claim 1 is characterized in that: describedly be anodizing between aluminium foil and Cathode Foil and be full of described polymer dielectric in described electrolytic paper.
9. the manufacture method of a solid electrolyte/aluminum electrolytic capacitor, is characterized in that: comprise the following steps:
(1) positive terminal is connected on an end that is anodizing to aluminium foil, then get involved electrolytic paper being anodizing between aluminium foil and Cathode Foil, be wound into the core bag, wherein, the width of described Cathode Foil is greater than the described width that is anodizing to paper tinsel and described electrolytic paper, make the Cathode Foil described in gained core bag exceed to be anodizing to paper tinsel and electrolytic paper and expose, the core bag of coiling is with fixing around clinging with adhesive tape ring;
(2), step (1) gained core bag is immersed in forming liquid and changed into repair process, the described repair process mode that changes into is for directly being sandwiched in folder, or is welded in iron bar, and fixture or iron bar are as positive pole, forming liquid is as negative pole, and the formation voltage of anode foils gets final product in addition;
(3), the mode by impregnation makes through forming polymer dielectric in the core bag of step (2);
(4), the polymer dielectric on the surface of the Cathode Foil that exposes is removed, with laser, cathode conductive film is welded on the part exposed of Cathode Foil;
(5), at the core through step (4), wrap and install Jiao Gai,, in the aluminum hull of packing into, with ultrasonic bond or laser, cathode conductive film and aluminum hull are welded;
(6), form sealing that aluminum hull and Jiao Gai are sealed by rolling, obtain described solid electrolyte/aluminum electrolytic capacitor.
10. the manufacture method of solid electrolytic electrolytic capacitor according to claim 9, it is characterized in that: described manufacture method also is included in step (6) afterwards, the gained solid electrolyte/aluminum electrolytic capacitor is carried out to the step of high temperature ageing and testing, sorting successively, wherein, the high temperature ageing condition is as follows: ambient temperature is controlled between 85 ℃ ~ 200 ℃, apply voltage and be respectively 20%, 80%, 100% and 120% operating voltage, ageing time is 10 ~ 240 minutes.
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| CN104882278A (en) * | 2015-05-28 | 2015-09-02 | 南通华裕电子有限公司 | Farad level electrolytic capacitor lead sheet hydraulic riveting technology |
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Denomination of invention: Production method of solid-electrolyte aluminum electrolytic capacitor Effective date of registration: 20170412 Granted publication date: 20160622 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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