CN105006365A - Heat-conducting glue for coiled solid electrolytic capacitor, capacitor and production method - Google Patents
Heat-conducting glue for coiled solid electrolytic capacitor, capacitor and production method Download PDFInfo
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- CN105006365A CN105006365A CN201510433431.1A CN201510433431A CN105006365A CN 105006365 A CN105006365 A CN 105006365A CN 201510433431 A CN201510433431 A CN 201510433431A CN 105006365 A CN105006365 A CN 105006365A
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Abstract
The invention discloses a heat-conducting glue for a coiled solid electrolytic capacitor, wherein an aluminum shell and elements are integrated to improve the vibration resistance of the capacitor. The heat-conducting glue is characterized in that the volume of the heat-conducting glue before and after the curing process changes within 1%. After the curing process, the insulation resistance of the heat-conducting glue is larger than 100 M omega and the shore hardness of the heat-conducting glue is 73-91. The heat conductivity of the heat-conducting glue is larger than 1W/mK and the heat resistance temperature of the heat-conducting glue is larger than 150 DEG C. The production method of the capacitor comprises the steps of element preparation, high-temperature treatment, packaging and aging. The prepared elements of the capacitor are packaged inside the aluminum shell by the heat-conducting glue. The heat-conducting glue, on one side of the guide pins of the elements, is 2-4 mm in thickness and is in flush with the opening edge of the aluminum shell. According to the technical scheme of the invention, the capacitor is sealed by the heat-conducting glue, and the aluminum shell and the elements are integrated as one piece. The aluminum shell and the elements are bonded together by the heat-conducting glue, so that the ripple resistance and the vibration resistance of products are improved. Under the same external environment, the rated ripple current is increased by 10%-23%. During the test on the vibration resistance performance, the capacitance of the capacitor changes by less than 1% and the leakage current thereof changes by less than 20%.
Description
Technical field
The present invention relates to a kind of solid electrolytic capacitor, specifically a kind of takeup type solid electrolytic capacitor heat-conducting glue and capacitor and production method, particularly relate to a kind of aluminum hull integrated with sub-prime, to improve the takeup type solid electrolytic capacitor heat-conducting glue of the vibration-resistant property of capacitor and capacitor and production method.
Background technology
In the production of takeup type solid electrolytic capacitor, its master operation generally comprises prepares that sub-prime, group are vertical, Aging Step, in the vertical step of group, sub-prime is put micelle or rubber stopper, puts into aluminum hull, then, with a tight waist at rubber stopper place.Owing to having space between sub-prime and aluminum hull, air conduction coefficient is low, and in aluminum hull, sub-prime thermal diffusivity is poor.During vibration, the relative position of sub-prime and aluminum hull changes, and is exaggerated the shortcoming of the solid solid interface resistance to vibration difference that conducting polymer and oxide-film are formed, and in the device of Downstream Market manufactures, easily occurs the problem that capacitor properties is bad; Meanwhile, guide pin is through rubber stopper, and there is space at guide pin and rubber stopper place, in the later stage to guide pin shearing, bent angle, weld, when flattening process, the vibration caused can cause the leakage current at guide pin and aluminium foil riveting place to increase.
To this, document 1: the patent No. is 201210403725.6, the applying date is 2012-10-22, denomination of invention is the aluminium electrolytic capacitor that patent discloses a kind of vibration resistance of production method of aluminum electrolytic capacitor and the vertical machine of full-automatic group, namely after group is stood, taken turns by indent and at least press a technology groove at the middle part of aluminium electrolytic capacitor aluminum hull, cause change and the quality problems of product electrical property to prevent because of product vibration, extend the useful life of product.But, poor thermal conductivity between aluminum hull and sub-prime, sub-prime internal heat dissipating is limited in one's ability; And the indent degree of depth is wayward, if the indent degree of depth is inadequate, between indent and sub-prime, still have space, if pressure is too dark, damage sub-prime.
Document 2: the patent No. is 200710017657.9, the applying date is 2007-09-12, denomination of invention is that patent discloses of a kind of manufacture method of coiled solid electrolysis capacitor is a kind of by sub-prime epoxy resin and polyimide resin perfusion, encapsulate after high-temperature cross-linking, produce Large Copacity, Low ESR, low-leakage current, the coiled solid electrolysis capacitor of high stability.But, the object of its technical scheme mainly reducing later stage encapsulation, when welding the guide pin vibration caused, to the performance impact of conducting polymer and alumina interface.And by impregnating elements in resin, easily cause the outer field resin of sub-prime uneven, process bottom resin is also needed after dipping, cause the waste of resin, increase production cost, meanwhile, between sub-prime and aluminum hull, still there is space, effectively can not solve the problem that coiled solid electrolysis capacitor resistance to vibration is bad, thermal diffusivity is bad.
Summary of the invention
The object of this invention is to provide a kind of aluminum hull integrated with sub-prime, to improve the takeup type solid electrolytic capacitor heat-conducting glue of the vibration-resistant property of capacitor and capacitor and production method.
The present invention adopts following technical scheme to realize its goal of the invention, a kind of takeup type solid electrolytic capacitor production method, and it comprises the following steps:
(1) prepare sub-prime: nail riveting had the anode aluminium foil of positive guide pin and nail riveting to have the cathode aluminum foil of negative guide pin to clip membrane coil and be coiled into fuse, by barrier film carbonization at 200 DEG C ~ 300 DEG C, repair oxide-film with forming liquid, obtained sub-prime after cleaning-drying, impregnation medicament, oven dry;
(2) high-temperature process: the sub-prime that (1) step is prepared at 100 DEG C ~ 130 DEG C, high-temperature process 20min ~ 60min, then at 125 DEG C ~ 200 DEG C, high temperature places 1 min ~ 10min;
(3) encapsulate: the sub-prime heat-conducting glue after step (2) high-temperature process is encapsulated in aluminum hull, during encapsulation, ensure that the thickness of sub-prime guide pin side heat-conducting glue is 2 ㎜ ~ 4 ㎜, and maintain an equal level with the edge of opening of aluminum hull;
(4) aging: semi-finished product step (3) prepared are at 100 DEG C ~ 130 DEG C, and burin-in process 20min ~ 40min, namely obtains coiled solid electrolysis capacitor.
The present invention step (2) in, described high-temperature process is by rated voltage high-temperature process 20min ~ 60min to the sub-prime of rated voltage < 25V.
The present invention step (2) in, described high-temperature process is be divided into four voltage sections by 20V to product rated voltage to the sub-prime of rated voltage >=25V, each voltage section high-temperature process 5min ~ 15min.
The present invention step (3) in, change in volume < 1 ﹪ before and after described heat-conducting glue solidification, after solidification, insulation resistance > 100M Ω, shore hardness: 73 ~ 91, thermal conductivity > 1W/mK, heat resisting temperature is greater than 150 DEG C.
The present invention step (4) in, described burin-in process is by rated voltage burin-in process 20min ~ 40min to the semi-finished product of rated voltage < 25V.
The present invention step (4) in, described burin-in process is be divided into four voltage sections by 20V to product rated voltage to the semi-finished product of rated voltage >=25V, each voltage section burin-in process 5min ~ 10min.
A kind of takeup type solid electrolytic capacitor, it comprises sub-prime, encapsulation aluminum hull, and described sub-prime is packaged in aluminum hull by heat-conducting glue, and the thickness of sub-prime guide pin side heat-conducting glue is 2 ㎜ ~ 4 ㎜, and maintains an equal level with the edge of opening of aluminum hull; Prepared rated capacitor ripple current increases by 10 ﹪ ~ 23 ﹪, and in resistance to vibration experiment, its electric capacitance change is less than 1 ﹪, and leakage current change is less than 20 ﹪.
Change in volume < 1 ﹪ before and after heat-conducting glue solidification of the present invention, after solidification, insulation resistance > 100M Ω, shore hardness: 73 ~ 91, thermal conductivity > 1W/mK, heat resisting temperature is greater than 150 DEG C.
A kind of takeup type solid electrolytic capacitor heat-conducting glue, for takeup type solid electrolytic capacitor sub-prime is packaged in aluminum hull, change in volume < 1 ﹪ before and after described heat-conducting glue solidification, after solidification, insulation resistance > 100M Ω, shore hardness: 73 ~ 91, thermal conductivity > 1W/mK, heat resisting temperature is greater than 150 DEG C.
Owing to adopting technique scheme, the present invention achieves goal of the invention preferably, adopts heat-conducting glue sealing, realizes the integrated of aluminum hull and sub-prime, and one is the product of same size, can select the aluminum hull that size is less, more miniaturized; Two is that improve the performance of the resistance to ripple of product, vibration resistance, under same external environment, rated ripple current increases by 10 ﹪ ~ 23 ﹪ by heat-conducting glue bonding between aluminum hull and sub-prime, and in resistance to vibration experiment, electric capacitance change is less than 1 ﹪, and leakage current change is less than 20 ﹪; Three is that guide pin and sealing part are very close to each other, reduces subsequent handling, as shear angle, bent angle, weld, flatten process on capacitor performance impact risk.
Embodiment
Below in conjunction with embodiment, the invention will be further described.
Embodiment 1:
A kind of takeup type solid electrolytic capacitor heat-conducting glue, for takeup type solid electrolytic capacitor sub-prime is packaged in aluminum hull, change in volume < 1 ﹪ before and after described heat-conducting glue solidification, after solidification, insulation resistance > 100M Ω, shore hardness: 73 ~ 91, thermal conductivity > 1W/mK, heat resisting temperature is greater than 150 DEG C.
The heat-conducting glue that the present embodiment is selected be Shen Zhen city Lang fight ten thousand Fine Chemical Co., Ltd produce Lang Bowan (NO.1-6636-2) waterproof insulation heat conduction high-temperature plastic.
A kind of takeup type solid electrolytic capacitor production method, it comprises the following steps:
(1) prepare sub-prime: nail riveting had the anode aluminium foil of positive guide pin and nail riveting to have the cathode aluminum foil of negative guide pin to clip membrane coil and be coiled into fuse, by barrier film carbonization at 200 DEG C ~ 300 DEG C, repair oxide-film with forming liquid, obtained sub-prime after cleaning-drying, impregnation medicament, oven dry;
The present embodiment step (1) in prepared be the sub-prime of 16V560 μ F.
(2) high-temperature process: gas generated for what reduce in capacitor aging or use procedure, the sub-prime that (1) step is prepared at 100 DEG C ~ 130 DEG C, high-temperature process 20min ~ 60min, then at 125 DEG C ~ 200 DEG C, high temperature places 1 min ~ 10min;
The present invention step (2) in, described high-temperature process is by rated voltage high-temperature process 20min ~ 60min to the sub-prime of rated voltage < 25V.
The present embodiment, at 105 DEG C, applies 16V rated voltage to sub-prime, high-temperature process 30min; Then no power, at 135 DEG C, high temperature places 8min.
(3) encapsulate: the sub-prime heat-conducting glue after step (2) high-temperature process is encapsulated in aluminum hull, during encapsulation, ensure that the thickness of sub-prime guide pin side heat-conducting glue is 2 ㎜ ~ 4 ㎜, and maintain an equal level with the edge of opening of aluminum hull;
The present invention step (3) in, change in volume < 1 ﹪ before and after described heat-conducting glue solidification, after solidification, insulation resistance > 100M Ω, shore hardness: 73 ~ 91, thermal conductivity > 1W/mK, heat resisting temperature is greater than 150 DEG C.
The heat-conducting glue that the present embodiment is selected be Shen Zhen city Lang fight ten thousand Fine Chemical Co., Ltd produce Lang Bowan (NO.1-6636-2) waterproof insulation heat conduction high-temperature plastic.Sub-prime heat-conducting glue is encapsulated in aluminum hull, during encapsulation, ensures that the thickness of sub-prime guide pin side heat-conducting glue is 2.5 ㎜, and maintain an equal level with the edge of opening of aluminum hull, 50 DEG C ~ 80 DEG C 10min ~ 60min that are heating and curing.
(4) aging: semi-finished product step (3) prepared are at 100 DEG C ~ 130 DEG C, and burin-in process 20min ~ 40min, namely obtains coiled solid electrolysis capacitor.
The present invention step (4) in, described burin-in process is by rated voltage burin-in process 20min ~ 40min to the semi-finished product of rated voltage < 25V.
The present embodiment is by the semi-finished product of preparation at 125 DEG C, and rated voltage 16V burin-in process 40min, namely obtains the coiled solid electrolysis capacitor of 16V560 μ F, and its apparent size (diameter × highly) be 10 ㎜ × 10 ㎜, be less than 10 conventional ㎜ × 12 ㎜.
A kind of takeup type solid electrolytic capacitor, it comprises sub-prime, encapsulation aluminum hull, and described sub-prime is packaged in aluminum hull by heat-conducting glue, and the thickness of sub-prime guide pin side heat-conducting glue is 2 ㎜ ~ 4 ㎜, and maintains an equal level with the edge of opening of aluminum hull; Prepared rated capacitor ripple current increases by 10 ﹪ ~ 23 ﹪, and in resistance to vibration experiment, its electric capacitance change is less than 1 ﹪, and leakage current change is less than 20 ﹪.
Change in volume < 1 ﹪ before and after heat-conducting glue solidification of the present invention, after solidification, insulation resistance > 100M Ω, shore hardness: 73 ~ 91, thermal conductivity > 1W/mK, heat resisting temperature is greater than 150 DEG C.
The heat-conducting glue that the present embodiment is selected be Shen Zhen city Lang fight ten thousand Fine Chemical Co., Ltd produce Lang Bowan (NO.1-6636-2) waterproof insulation heat conduction high-temperature plastic.Prepared 16V560 μ F coiled solid electrolysis capacitor, and its apparent size (diameter × highly) be 10 ㎜ × 10 ㎜, be less than 10 conventional ㎜ × 12 ㎜.After testing, at 105 DEG C, 100kHz, under same external environment, rated ripple current increases by 16.3 ﹪; In resistance to vibration experiment (condition (25 ± 10) DEG C, 10 Hz ~ 55Hz, amplitude 0.75 ㎜, X, Y, Z tri-each 2h in direction), concrete testing result sees the following form:
As can be known from the above table, before and after vibration, capacitance (CAP) changes average out to and reduces by 0.3 ﹪, leakage current (LC) changes average out to and increases by 13 ﹪, because leakage current increases, loss (DF) slightly increases, the damage vibrating conducting polymer and the electrode interface caused is less, and therefore equivalent series resistance (ESR) remains unchanged substantially.Above-mentioned measurement tests with causing new integrated test system ZX2786, wherein CAP test condition is 20 DEG C, 120Hz, ESR test condition is 20 DEG C, 100kHz, and leakage current tests on Chroma111200, test is 20 DEG C, tests after rated voltage charging 2min again.
Embodiment 2:
Step (1) in, prepared by the present embodiment is the sub-prime of 35V56 μ F.
The present invention step (2) in, described high-temperature process is be divided into four voltage sections by 20V to product rated voltage to the sub-prime of rated voltage >=25V, each voltage section high-temperature process 5min ~ 15min.
The present embodiment step (2) in, by rated voltage 20V, 25V, 30V, 35V, each voltage section high-temperature process 5min.
The present invention step (4) in, described burin-in process is be divided into four voltage sections by 20V to product rated voltage to the semi-finished product of rated voltage >=25V, each voltage section burin-in process 5min ~ 10min.
The present embodiment step (4) in, by rated voltage 20V, 25V, 30V, 35V, each voltage section burin-in process 10min, the i.e. coiled solid electrolysis capacitor of obtained 35V56 μ F, its apparent size (diameter × highly) be 8 ㎜ × 9 ㎜, be less than 8 conventional ㎜ × 11 ㎜.After testing, at 105 DEG C, 100kHz, under same external environment, rated ripple current increases by 14.8 ﹪; In resistance to vibration experiment, electric capacitance change is less than 0.86 ﹪, and leakage current change is less than 16.3 ﹪.
Remaining with embodiment 1.
Claims (9)
1. a takeup type solid electrolytic capacitor production method, is characterized in that it comprises the following steps:
(1) prepare sub-prime: nail riveting had the anode aluminium foil of positive guide pin and nail riveting to have the cathode aluminum foil of negative guide pin to clip membrane coil and be coiled into fuse, by barrier film carbonization at 200 DEG C ~ 300 DEG C, repair oxide-film with forming liquid, obtained sub-prime after cleaning-drying, impregnation medicament, oven dry;
(2) high-temperature process: the sub-prime that (1) step is prepared at 100 DEG C ~ 130 DEG C, high-temperature process 20min ~ 60min, then at 125 DEG C ~ 200 DEG C, high temperature places 1 min ~ 10min;
(3) encapsulate: the sub-prime heat-conducting glue after step (2) high-temperature process is encapsulated in aluminum hull, during encapsulation, ensure that the thickness of sub-prime guide pin side heat-conducting glue is 2 ㎜ ~ 4 ㎜, and maintain an equal level with the edge of opening of aluminum hull;
(4) aging: semi-finished product step (3) prepared are at 100 DEG C ~ 130 DEG C, and burin-in process 20min ~ 40min, namely obtains coiled solid electrolysis capacitor.
2. takeup type solid electrolytic capacitor production method according to claim 1, it is characterized in that step (2) in, described high-temperature process is by rated voltage high-temperature process 20min ~ 60min to the sub-prime of rated voltage < 25V.
3. takeup type solid electrolytic capacitor production method according to claim 1, it is characterized in that step (2) in, described high-temperature process is be divided into four voltage sections by 20V to product rated voltage to the sub-prime of rated voltage >=25V, each voltage section high-temperature process 5min ~ 15min.
4. takeup type solid electrolytic capacitor production method according to claim 1, it is characterized in that step (3) in, change in volume < 1 ﹪ before and after described heat-conducting glue solidification, after solidification, insulation resistance > 100M Ω, shore hardness: 73 ~ 91, thermal conductivity > 1W/mK, heat resisting temperature is greater than 150 DEG C.
5. takeup type solid electrolytic capacitor production method according to claim 1, it is characterized in that step (4) in, described burin-in process is by rated voltage burin-in process 20min ~ 40min to the semi-finished product of rated voltage < 25V.
6. takeup type solid electrolytic capacitor production method according to claim 1, it is characterized in that step (4) in, described burin-in process is be divided into four voltage sections by 20V to product rated voltage to the semi-finished product of rated voltage >=25V, each voltage section burin-in process 5min ~ 10min.
7. a takeup type solid electrolytic capacitor, it comprises sub-prime, encapsulation aluminum hull, and it is characterized in that described sub-prime is packaged in aluminum hull by heat-conducting glue, the thickness of sub-prime guide pin side heat-conducting glue is 2 ㎜ ~ 4 ㎜, and maintains an equal level with the edge of opening of aluminum hull; Prepared rated capacitor ripple current increases by 10 ﹪ ~ 23 ﹪, and in resistance to vibration experiment, its electric capacitance change is less than 1 ﹪, and leakage current change is less than 20 ﹪.
8. takeup type solid electrolytic capacitor according to claim 7, it is characterized in that change in volume < 1 ﹪ before and after described heat-conducting glue solidification, after solidification, insulation resistance > 100M Ω, shore hardness: 73 ~ 91, thermal conductivity > 1W/mK, heat resisting temperature is greater than 150 DEG C.
9. a takeup type solid electrolytic capacitor heat-conducting glue, it is characterized in that for takeup type solid electrolytic capacitor sub-prime is packaged in aluminum hull, change in volume < 1 ﹪ before and after described heat-conducting glue solidification, after solidification, insulation resistance > 100M Ω, shore hardness: 73 ~ 91, thermal conductivity > 1W/mK, heat resisting temperature is greater than 150 DEG C.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107331521A (en) * | 2017-08-11 | 2017-11-07 | 佛山市三水日明电子有限公司 | The manufacture method of polymer solid aluminum electrolytic capacitor |
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| CN1773640A (en) * | 2005-09-06 | 2006-05-17 | 万裕三信电子(东莞)有限公司 | Solid electrolytic capacitor and producing method thereof |
| JP2007273751A (en) * | 2006-03-31 | 2007-10-18 | Nichicon Corp | Solid electrolytic capacitor and manufacturing method thereof |
| CN101106023A (en) * | 2007-08-16 | 2008-01-16 | 南通江海电容器有限公司 | Solid electrolytic capacitor making process |
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- 2015-07-22 CN CN201510433431.1A patent/CN105006365B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1773640A (en) * | 2005-09-06 | 2006-05-17 | 万裕三信电子(东莞)有限公司 | Solid electrolytic capacitor and producing method thereof |
| JP2007273751A (en) * | 2006-03-31 | 2007-10-18 | Nichicon Corp | Solid electrolytic capacitor and manufacturing method thereof |
| CN101106023A (en) * | 2007-08-16 | 2008-01-16 | 南通江海电容器有限公司 | Solid electrolytic capacitor making process |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107331521A (en) * | 2017-08-11 | 2017-11-07 | 佛山市三水日明电子有限公司 | The manufacture method of polymer solid aluminum electrolytic capacitor |
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