CN102064022B - Stress absorption device at anode terminal of solid electrolytic capacitor - Google Patents
Stress absorption device at anode terminal of solid electrolytic capacitor Download PDFInfo
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- CN102064022B CN102064022B CN 200910223308 CN200910223308A CN102064022B CN 102064022 B CN102064022 B CN 102064022B CN 200910223308 CN200910223308 CN 200910223308 CN 200910223308 A CN200910223308 A CN 200910223308A CN 102064022 B CN102064022 B CN 102064022B
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Abstract
The invention discloses a stress absorption device at an anode terminal of a solid electrolytic capacitor which is provided with a plurality of stacked capacitor elements, wherein the capacitor elements are stacked on an anode terminal and a cathode terminal which are used as conducting connection points, and the capacitor elements, the anode terminal and the cathode terminal are packaged by packaging materials such as synthetic resin and the like; conductive adhesives are arranged between the cathodes of the adjacent capacitor elements and the outer sides of the cathodes; insulation paste is arranged at the inner sides of the cathodes, and the stacked capacitor elements are jointed and fixed by the conductive adhesives and the insulation paste; and in addition, another insulation paste is coated at the boundary or vicinage of the anodes and the cathodes of the capacitor elements, and is used for absorbing the tensile stress and bending stress generated by external force at the boundary base part or vicinage of the anodes and the cathodes in the anode welding and packaging process, so that the bending deflection at the base part or vicinage of the anodes and the cathodes is reduced, and solving the problems that the thicknesses of the cathode base part and end part of the solid electrolytic capacitor are different and the anodes and the cathodes can be even damaged.
Description
Technical field
The present invention relates to a kind of stress absorption device of solid electrolytic capacitor anode tap, particularly, relate to a kind of solid electrolytic capacitor when anode welding and encapsulation, can absorb boundary or near its anode tap stress absorption device that produces tensile stress and bending stress because of external force of antianode and negative electrode.
Background technology
Shown in Figure 1A, the 1B is existing solid electrolytic capacitor, such as Taiwan Patent Case notification number I283878 number, its solid electrolytic capacitor 10 contains a plurality of stacked capacitor elements 6, and anode terminal 12 and cathode terminal 13 are installed below being positioned at stacked undermost capacitor element 6; Except the lower surface of anode terminal 12 and cathode terminal 13, capacitor element 6, anode terminal 12 and cathode terminal 13 cover by synthetic resin 14.
Figure 1B is above-mentioned capacitor element 6, is formed with dielectric medium oxide-film 2 and cathode layer 3 having valve action and this surface as the aluminium foil 1 of metal as anode bodies; This cathode layer 3 is to be made of solid electrolyte layer 3a, carbon-coating 3b and silver coating layer 3c that the poly-electric conductive polymer of filling in fen system (polythiophene) consists of; The part that is formed with cathode layer 3 at described dielectric medium oxide-film 2 is negative electrode 8, and the part that is not formed with cathode layer 3 is anode 7; In the situation that this multi-plate condenser element 6 stacked formations, the anode 7 of adjacent capacitor element 6 is welded and fixed, and utilize conductivity bridging agent 18 to be connected and fixed on the negative electrode 8 of adjacent capacitor element 6, thereby form cascade type solid electrolytic capacitor 10.
Near negative electrode 8 in anode terminal 12 bottom surfaces of above-mentioned anode 7 and the boundary 15 of anode 7, be provided with the 1st stress and relax the 16 and the 2nd stress mitigation of cracking and crack 17.Crack 16 and 17 owing to being provided with the mitigation of two stress, anode 7 can relax 16, the 17 place's bendings of cracking at these two stress.At 15 places, boundary of anode 7 and negative electrode 8 or can suppress applying of bending stress near it, can diminish so put on the stress of this part.Yet, although the solid electrolytic capacitor 10 of this patent can rely on two stress to relax 16 and 17 bendings of cracking, be suppressed at anode 7 and 15 places, boundary of negative electrode 8 or near applying of its bending stress, but increase laser cutting stress and relaxed 16 and 17 the production process of cracking, cause production cost to reduce, and time-consuming taking a lot of work.
In order to save this production process of 16,17 of cracking, the practice of general anode is all shown in 1C figure, but this structure has caused: after capacitor element is stacked, the end of negative electrode and base portion thickness are not of uniform size, even so that anode and/or negative electrode sustain damage, cause qualification rate to reduce the problem that cost improves.
Summary of the invention
The object of the invention is to, rely on manufacturing experience and the technological accumulation of existing capacitor, research and solve way for the problems referred to above are concentrated, after constantly studying, test and improveing, the stress absorption device of a kind of solid electrolytic capacitor anode tap that proposes is to address the above problem.
The object of the invention is to, a kind of stress absorption device of solid electrolytic capacitor anode tap is being provided, by utilizing the elasticity of insulating cement, antianode and the boundary of negative electrode or tensile stress and the bending stress that near the external force it produces when absorbing because of manufacturing.
For achieving the above object, the stress absorption device of solid electrolytic capacitor anode tap of the present invention, this solid electrolytic capacitor has a plurality of stacked capacitor elements, capacitor element is on the anode terminal and cathode terminal that is laminated in as conductive junction point, and by the encapsulating materials such as synthetic resin with capacitor element, anode terminal and cathode terminal encapsulated the institute consist of; Wherein, be provided with conducting resinl by the outside of negative electrode between the negative electrode of adjacent capacitor element, in addition, then be provided with insulating cement by the inboard of negative electrode, rely on conducting resinl and insulating cement is connected to each other stacked capacitor element and fix; Near the boundary of the anode of each capacitor element and negative electrode or its, be coated with another insulating cement in addition, near tensile stress and the bending stress that produces because of external force of the boundary base portion of anode and negative electrode or its when being used for absorbing anode welding and encapsulation, the Bending Deformation of this part is reduced, solution is not of uniform size because of negative electrode base portion and the end thickness of solid electrolytic capacitor, even hurts the situation of anode and negative electrode.
The stress absorption device of solid electrolytic capacitor anode tap of the present invention, free-revving engine of the present invention is, negative electrode and positive electrode is subject to external force and the stress that produces can reduce greatly during fabrication, and both distortion can reduce, also can not sustain damage, the qualification rate of production can greatly increase.
Description of drawings
Accompanying drawing is used to provide a further understanding of the present invention, and consists of the part of specification, with reality of the present invention
Execute example one and be used from explanation the present invention, be not construed as limiting the invention.In the accompanying drawings:
Figure 1A～1C is the generalized section of existing solid electrolytic capacitor;
Fig. 2 is the generalized section of the stress absorption device of solid electrolytic capacitor anode tap of the present invention;
Fig. 3 is the generalized section of capacitor element unit of the stress absorption device of solid electrolytic capacitor anode tap of the present invention;
Fig. 4 is the generalized section of embodiment of the stress absorption device of solid electrolytic capacitor anode tap of the present invention;
Fig. 5 A, 5B are the generalized section of embodiment of the stress absorption device of solid electrolytic capacitor anode tap of the present invention.
By reference to the accompanying drawings, Reference numeral is as follows in the embodiment of the invention:
2-dielectric medium oxide-film; The 3-cathode layer; The 3a-solid electrolyte layer; The 3b-carbon-coating; 3c-silver coating layer; The 6-capacitor element; The 8-negative electrode; The 7-anode; The 10-solid electrolytic capacitor; The 12-anode terminal; The 13-cathode terminal; 14-synthetic resin; 15-has a common boundary; 16-the 1st stress relaxes and cracks; 17-the 2nd stress relaxes and cracks; 18-conductivity bridging agent; The 30-solid electrolytic capacitor; The 32-anode terminal; The 33-cathode terminal; 34-synthetic resin; 35-boundary base portion; The 37-conducting objects; The 36-capacitor element; The 361-electric conductor; 362-dielectric medium oxide-film; The 363-cathode layer; The 363a-solid electrolyte layer; The 363b-carbon-coating; 363c-silver coating layer; The 367-anode; The 368-negative electrode; The 50-conducting resinl; The 70-insulating cement; Another insulating cement of 70a-.
Embodiment
Describe below in conjunction with the preferred embodiment of accompanying drawing to invention, should be appreciated that preferred embodiment described herein only is used for description and interpretation the present invention, is not intended to limit the present invention.
The present invention is a kind of stress absorption device of solid electrolytic capacitor anode tap, shown in Fig. 2,3, solid electrolytic capacitor 30 of the present invention has a plurality of stacked capacitor elements 36, and capacitor element 36 is laminated on conductive junction point anode terminal 32 and the cathode terminal 33; Encapsulating material synthetic resin 34 coats the capacitor body that capacitor element 36, anode terminal 32 and cathode terminal 33 consist of.
Described capacitor element Unit 36 are formed with dielectric medium oxide-film 362 and cathode layer 363 on the surface as the metallic conductor 361 of anode as shown in Figure 3; These cathode layer 363 better formations are: solid electrolyte layer 363a, the carbon-coating 363b and the silver coating layer 363c that are made of the electric conductive polymer of poly-plug fen system (polythiophene); The part that is formed with cathode layer 363 at described dielectric medium oxide-film 362 is negative electrode 368, and the part that does not form cathode layer 363 is anode 367; The capacitor element 36 of this formation is multiple coinciding first, and the anode 367 with adjacent capacitor element 36 is welded to each other fixing again.And between the negative electrode 368 of adjacent capacitor element 36, and between the capacitor element negative electrode of below and the cathode terminal its side by cathode end be provided with the conducting resinl 50 of elargol, silver alloy glue or other materials, side by the negative electrode base portion, be provided with insulating cement 70, by conducting resinl 50, insulating cement 70 stacked capacitor element 36 is interconnected and fixed, thereby forms cascade type solid electrolytic capacitor 30.
In the bottom surface of the anode terminal 32 of described anode 367, near the boundary 35 of negative electrode 368 and anode 367, be coated with insulating cement 70a, rely on the elasticity of insulating cement 70a and described insulating cement 70, when by welding the anode terminal end being linked or when bending concentrated anode terminal and encapsulate the application of force, can absorb external force, thus the stress that minimizing anode and negative electrode produce.The leakage current that just can be suppressed at the capacitor that 35 places, boundary or near the anode 367 it of anode 367 and negative electrode 368 cause because external force is impaired increases, and because that short circuit causes is bad.In addition, the present invention is because the set conducting resinl of negative electrode downside and the effect of insulating cement, utilizing welding that anode terminal is linked or when bending concentrated anode terminal and the negative pole part encapsulation application of force, can not produce the bending of negative electrode and form the situation that two-end thickness differs.
Such as 4 figure, this figure is the generalized section of another embodiment of the stress absorption device of solid electrolytic capacitor anode tap of the present invention, among this embodiment, solid electrolytic capacitor 30 has a plurality of stacked capacitor elements 36, and capacitor element 36 is to be layered in upper as the anode terminal 32 of conductive junction point and cathode terminal 33; Anode terminal 32 and cathode terminal 33 another sides are provided with equally another and organize a plurality of stacked capacitor elements 36, by synthetic resin 34 encapsulating materials such as grade the capacitor body that capacitor element 36, anode terminal 32 and cathode terminal 33 consist of are coated again.
The capacitor element 36 that so consists of is to carry out first multiple superimposedly, and the anode 367 with adjacent capacitor element 36 is welded to one another fixing again.And wherein, negative electrode 368 belows of each capacitor element 36, side near its end is provided with elargol, silver alloy glue or other conducting resinls 50, side near its base portion then is provided with insulating cement 70, rely on conducting resinl 50 and insulating cement 70 that stacked capacitor element 36 is connected to each other and be fixed on the cathode terminal, thereby form cascade type solid electrolytic capacitor 30.
In the bottom surface of the anode terminal 32 of above-mentioned anode 367, near the boundary base portion 35 of negative electrode 368 and anode 367, be coated with insulating cement 70a, rely on the effect of insulating cement 70a and above-mentioned insulating cement 70, when utilize welding that the anode end is linked or encapsulation when bending the concentrated anode terminal application of force, can absorb boundary or near its institute externally applied forces of antianode 367 and negative electrode 368, thus the stress that minimizing anode and negative electrode produce.As a result, the leakage current that just can be suppressed at the capacitor that boundary 35 or near the anode 367 it of anode 367 and negative electrode 368 cause because external force is impaired increases, and because that short circuit causes is bad, qualification rate improves greatly.
Shown in Fig. 5 A, 5B figure, can be lined with the conducting objects 37 of any metal alloy compositions between the anode 367 of each capacitor element 36, the recycling welding manner is interconnected on the anode terminal 32 end of anode 367 and conducting objects 37, this connected mode, can be when utilizing welding that the anode terminal end is linked or during the antianode terminal encapsulation application of force, absorb external force and reduce the stress that anode and negative electrode produce.
It should be noted that at last: the above only is the preferred embodiments of the present invention, be not limited to the present invention, although with reference to previous embodiment the present invention is had been described in detail, 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, and perhaps part technical characterictic wherein is equal to replacement.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (6)
1. the stress absorption device of a solid electrolytic capacitor anode tap, that kind of solid electrolytic capacitor has a plurality of stacked capacitor elements, described capacitor element is on the anode terminal and cathode terminal that is laminated in as conductive junction point, and coated by the capacitor body that the encapsulating materials such as synthetic resin consist of capacitor element, anode terminal and cathode terminal, it is characterized in that:
Between the negative electrode of adjacent described capacitor element, and be provided with conducting resinl and the first insulating cement between capacitor element and the cathode terminal, rely on described conducting resinl and described the first insulating cement to be connected to each other stacked capacitor element fixing, near the boundary base portion of the anode of each capacitor element and negative electrode or its, be coated with the second insulating cement again, utilize the elasticity of the second insulating cement and described the first insulating cement, absorb during fabrication capacitor element, anode and negative electrode because of the stress that externally applied forces produces, avoid capacitor element to sustain damage and be out of shape.
2. the stress absorption device of described solid electrolytic capacitor anode tap according to claim 1, it is characterized in that, the outer conducting resinl that is coated with of the negative electrode of described capacitor element is one section that is located near the end of negative electrode, and insulating cement is one section that is located near the base portion of negative electrode.
3. according to claim 1 or the stress absorption device of 2 described solid electrolytic capacitor anode taps, it is characterized in that, the main material of described conducting resinl is silver or silver alloy glue.
4. according to claim 1 or the stress absorption device of 2 described solid electrolytic capacitor anode taps, it is characterized in that, wherein the top and following symmetric position place of anode terminal and cathode terminal respectively is provided with one group of stacked capacitor element, described stacked capacitor element and anode terminal and cathode terminal and downlink connection.
5. the stress absorption device of described solid electrolytic capacitor anode tap according to claim 4 is characterized in that, the main material of described conducting resinl is silver or silver alloy glue.
6. the stress absorption device of described solid electrolytic capacitor anode tap according to claim 1 is characterized in that, can be lined with conducting objects between the anode of described each capacitor element.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910223308 CN102064022B (en) | 2009-11-17 | 2009-11-17 | Stress absorption device at anode terminal of solid electrolytic capacitor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910223308 CN102064022B (en) | 2009-11-17 | 2009-11-17 | Stress absorption device at anode terminal of solid electrolytic capacitor |
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| CN102064022A CN102064022A (en) | 2011-05-18 |
| CN102064022B true CN102064022B (en) | 2013-04-17 |
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| CN102646520A (en) * | 2011-10-19 | 2012-08-22 | 钰邦电子（无锡）有限公司 | Solid-state electrolytic capacitor with protective structure and manufacturing method thereof |
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| US20050248908A1 (en) * | 2004-05-06 | 2005-11-10 | Gunther Dreezen | Termination coating |
| TWI283879B (en) * | 2005-02-17 | 2007-07-11 | Sanyo Electric Co | Solid electrolytic capacitor and manufacturing method thereof |
| WO2007069670A1 (en) * | 2005-12-15 | 2007-06-21 | Showa Denko K. K. | Capacitor chip and method for manufacturing same |
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