CN104882286B - A kind of solid-state aluminum electrolytic capacitor - Google Patents
A kind of solid-state aluminum electrolytic capacitor Download PDFInfo
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- CN104882286B CN104882286B CN201510309073.3A CN201510309073A CN104882286B CN 104882286 B CN104882286 B CN 104882286B CN 201510309073 A CN201510309073 A CN 201510309073A CN 104882286 B CN104882286 B CN 104882286B
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- insulating resin
- aluminum electrolytic
- electrolytic capacitor
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- 239000003990 capacitor Substances 0.000 title claims abstract description 78
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 34
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 33
- 239000011347 resin Substances 0.000 claims abstract description 26
- 229920005989 resin Polymers 0.000 claims abstract description 26
- 239000011888 foil Substances 0.000 claims abstract description 22
- 239000011231 conductive filler Substances 0.000 claims abstract description 18
- 239000002861 polymer material Substances 0.000 claims abstract description 11
- 229920001940 conductive polymer Polymers 0.000 claims abstract description 10
- 239000000853 adhesive Substances 0.000 claims abstract description 8
- 230000001070 adhesive effect Effects 0.000 claims abstract description 8
- 210000001015 abdomen Anatomy 0.000 claims abstract description 3
- YTPLMLYBLZKORZ-UHFFFAOYSA-N Thiophene Chemical compound C=1C=CSC=1 YTPLMLYBLZKORZ-UHFFFAOYSA-N 0.000 claims abstract 4
- 229930192474 thiophene Natural products 0.000 claims abstract 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 53
- JPVYNHNXODAKFH-UHFFFAOYSA-N Cu2+ Chemical compound [Cu+2] JPVYNHNXODAKFH-UHFFFAOYSA-N 0.000 claims description 28
- 229910001431 copper ion Inorganic materials 0.000 claims description 28
- 150000003839 salts Chemical class 0.000 claims description 28
- NLZUEZXRPGMBCV-UHFFFAOYSA-N Butylhydroxytoluene Chemical compound CC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 NLZUEZXRPGMBCV-UHFFFAOYSA-N 0.000 claims description 14
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 claims description 14
- 239000003792 electrolyte Substances 0.000 claims description 11
- 239000004411 aluminium Substances 0.000 claims description 10
- 239000002006 petroleum coke Substances 0.000 claims description 9
- 229910052799 carbon Inorganic materials 0.000 claims description 8
- 239000011294 coal tar pitch Substances 0.000 claims description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 8
- 239000002994 raw material Substances 0.000 claims description 8
- 239000002562 thickening agent Substances 0.000 claims description 8
- 239000002245 particle Substances 0.000 claims description 7
- 238000002360 preparation method Methods 0.000 claims description 7
- 238000012545 processing Methods 0.000 claims description 7
- 229920001721 polyimide Polymers 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 230000008569 process Effects 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 239000004642 Polyimide Substances 0.000 claims description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 3
- 230000007797 corrosion Effects 0.000 claims description 3
- 238000005260 corrosion Methods 0.000 claims description 3
- 238000005530 etching Methods 0.000 claims description 3
- 239000008240 homogeneous mixture Substances 0.000 claims description 3
- 238000009413 insulation Methods 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- -1 iron ion Chemical class 0.000 claims description 3
- 230000001404 mediated effect Effects 0.000 claims description 3
- 239000009719 polyimide resin Substances 0.000 claims description 3
- 229910052717 sulfur Inorganic materials 0.000 claims description 3
- 239000011593 sulfur Substances 0.000 claims description 3
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims description 2
- 239000004696 Poly ether ether ketone Substances 0.000 claims description 2
- 230000003628 erosive effect Effects 0.000 claims description 2
- 239000010419 fine particle Substances 0.000 claims description 2
- 238000005470 impregnation Methods 0.000 claims description 2
- 239000012535 impurity Substances 0.000 claims description 2
- 239000011261 inert gas Substances 0.000 claims description 2
- 238000011017 operating method Methods 0.000 claims description 2
- 229920001568 phenolic resin Polymers 0.000 claims description 2
- 239000005011 phenolic resin Substances 0.000 claims description 2
- 229920002530 polyetherether ketone Polymers 0.000 claims description 2
- 229920005990 polystyrene resin Polymers 0.000 claims description 2
- 238000002242 deionisation method Methods 0.000 claims 1
- 239000010410 layer Substances 0.000 description 17
- 239000007787 solid Substances 0.000 description 9
- 229910052751 metal Inorganic materials 0.000 description 7
- 239000002184 metal Substances 0.000 description 7
- 239000007789 gas Substances 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000007784 solid electrolyte Substances 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical group O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000005030 aluminium foil Substances 0.000 description 2
- 238000001354 calcination Methods 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 239000011247 coating layer Substances 0.000 description 2
- 230000000536 complexating effect Effects 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 239000008367 deionised water Substances 0.000 description 2
- 229910021641 deionized water Inorganic materials 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000005755 formation reaction Methods 0.000 description 2
- 230000000505 pernicious effect Effects 0.000 description 2
- 238000000992 sputter etching Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 150000001398 aluminium Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229920005549 butyl rubber Polymers 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 239000002001 electrolyte material Substances 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000011244 liquid electrolyte Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920000123 polythiophene Polymers 0.000 description 1
- 238000004382 potting Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000007086 side reaction Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
Abstract
A kind of solid-state aluminum electrolytic capacitor, including capacitor body and a capacitor casing with opening, its capacitor includes cathode electrode unit and anode unit, the anode foils and Cathode Foil of cathode electrode unit and anode unit are molded over the back side of two thickness for 150 ~ 300 μm of conductive papers by conductive adhesive respectively, and a layer thickness is formed in the bottom of conductive paper for 500 ~ 800 μm of insulating resin films, insulating resin film conductive paper outside of belly edge bound edge and be connected at bound edge position by adhesive；In addition, filled with one layer of conductive filler in cavity configuration between the insulating resin film and conductive paper of cathode electrode unit；And the conductive polymer material layer filled with a strata thiophene system or polyphenylamine series in the cavity configuration between the insulating resin film and conductive paper of anode unit.Stable and reliable for performance, service life of the invention is long, can effectively reduce the production cost of related component.
Description
Technical field
It is more particularly to a kind of that there is low effect series inductor and working stability, service life the present invention relates to solid capacitor
Long solid-state aluminum electrolytic capacitor.
Background technology
Capacitor is mainly used to be tuned in circuit, filters, couples, bypassing, energy turns as a kind of energy-storage travelling wave tube
Change and delays time to control operation.Wherein, solid electrolyte aluminium electrolutic capacitor is used as capacitor cathode using conductive polymer material
The capacitor of material, because its structure and common liq aluminum capacitor are essentially identical, only replaces original liquid portion
For present solid portion.There is no any difference with original aluminum capacitor in shape, so client need not change circuit board
Structure, needs directly to replace solid aluminum capacitor according to design.In addition, the electrolyte of solid capacitor is that functional properties conductivity is high
Molecule, can be substantially improved the stability and security of product, meanwhile, it is to be made with liquid aluminum electrochemical capacitor maximum differential
Electrolyte, electrolyte used in past aluminum electrochemical capacitor is ionic electrolyte, and solid capacitor is then
It is conductive polymer material, thus performance is also more superior.
In recent years, as central processing unit (CPU) operation frequency and transistor size constantly increase, to ask system steady
Fixed, suggestion mainboard (MB) manufacturer of Intel (Intel) uses solid capacitor, therewith more and more on the mainboard of a new generation
The processor power pack of oneself high-end mainboard is all used solid capacitor by mainboard manufacturer.Meanwhile, with hand-held
Increasing and personal computer technology the development of electronic equipment, miniaturization, the high performance requirement of digital circuit are also got over
Come higher, related multimedia equipment（Such as digital video recorder, PC, digital television）Have been equipped with high velocity characteristic,
The development of these high speed electric products proposes the property such as Large Copacity, low impedance at high frequency, long-life, resistance to high ripple current to capacitor
Can require, traditional aluminium electrolutic capacitor due to having used ionic conductivity liquid electrolyte, thus have the impedance of high band it is high,
The problem of temperature characterisitic is bad.And the high capacitance of aluminium electrolutic capacitor, low ESR values and high reliability also become increasingly to weigh
Will, solid aluminum electrolytic capacitor uses the solid electrolyte of electronic conductivity（Electrical conductivity reaches 10 ~ 102S/cm）, with than liquid
Body electrolyte（Electrical conductivity much higher electrical conductivity ＜ 10-2 S/cm, effectively overcomes wet electrolytic capacitors in the upper of high band
Shortcoming is stated, requirement of the high speed electric products to capacitor is met.
And the failure of aluminium electrolutic capacitor of the prior art is mainly caused by the short circuit of circuit, when the electricity in short circuit current
Stream is more than 1A, and capacitor internal temperature will rise, internal pressure increase, and sealing rubber raised be able to will likely be opened even, electricity
Container can discharge pernicious gas.And when polarity of capacitor is reversed, when voltage is higher on circuit board, meeting is in capacitor internal
Very big electric current is formed, high current causes capacitor rapidly to generate heat, capacitor internal temperature may be caused to be higher than internal electrolyte
Or conductive material decomposition temperature when, can also promote solid electrolyte decomposition failure, release pernicious gas.Even and if normally making
With this kind of capacitor is in charge-discharge circuit after long-time use, and Cathode Foil end is given birth to due to side reactions such as association film formation reactions
Into products such as hydrogen, causing capacitor internal pressure to rise makes easy oozed out from the cathode line through hole on seal body of electrolyte make it
The phenomenons such as generation electric leakage, short circuit, causing the characteristic of solid aluminum capacitor can decay, such as the electricity such as capacity decline, ESR rise
The deterioration in characteristics of container, and then have influence on the stability and service life of capacitor in itself.
The content of the invention
Technical problem solved by the invention is to provide a kind of solid-state aluminum electrolytic capacitor, this aluminium electrolutic capacitor
For the high electrolytic capacitor of a kind of bulky capacitor, reliability, its good operating stability, service life is long, can be used to solve above-mentioned skill
Defect in art background.
Technical problem solved by the invention is realized using following technical scheme：
A kind of solid-state aluminum electrolytic capacitor, including capacitor body and a capacitor casing with opening, capacitor
Body carries out impregnation process by electrolyte and is fixed in capacitor casing, and the capacitor body is double-deck winding-structure,
Including cathode electrode unit and anode unit, include anode foils and Cathode Foil, sun in the cathode electrode unit and anode unit respectively
Pole paper tinsel and Cathode Foil are molded over the back side of two thickness for 150 ~ 300 μm of conductive papers by conductive adhesive respectively, and in conduction
It is 500 ~ 800 μm of insulating resin films that the bottom of paper, which forms a layer thickness, and insulating resin film is at the outside of belly edge of conductive paper
Bound edge is simultaneously connected at bound edge position by adhesive；In addition, between the insulating resin film and conductive paper of cathode electrode unit
It is complexed in cavity configuration filled with one layer of copper ion by coke powder, graphous graphite powder, TCNQ copper ion complex salt and EDTA
The conductive filler that salt is made；And one layer is filled with the cavity configuration between the insulating resin film and conductive paper of anode unit
The conductive polymer material layer of polythiophene system or polyphenylamine series.
A kind of preparation method of conductive filler, includes the raw material of following components and mass parts：
30 ~ 40 parts of coke powder
15 ~ 20 parts of graphous graphite powder
CO3S4 5 ~ 8 parts
2 ~ 3 parts of TCNQ copper ion complex salt
2 ~ 3 parts of EDTA copper ion complex salt
20 ~ 25 parts of coal tar pitch
Include operating procedure in detail below during preparation：
1st, by coke powder, graphous graphite powder, CO3S4, TCNQ copper ion complex salt and EDTA copper ion complex salt press
Mass parts proportions raw material.
2nd, by coke powder and graphous graphite powder it is fine ground be fine particle that particle diameter is 30 ~ 50 μm, then together add go from
Carry out ultrasonic wave in sub- water to disperse, jitter time is dry, standby after 2 hours.
3rd, by the coke powder handled in step 2 and graphous graphite powder and CO3S4, TCNQ copper ion complex salt and EDTA
Copper ion complex salt it is well mixed after mediate in input kneader, add temperature be 160 ~ 180 DEG C, softening point be 80 ~ 85
DEG C coal tar pitch be made thickener.
4th, the thickener prepared in step 3 is roasted under inert gas conditions and 1700 ~ 1900 DEG C of temperature conditionss
Burn, 3 hour aftershapings of roasting produce conductive filler finished product.
In the present invention, the Cathode Foil is the aluminium etched foil after 4 ~ 6mol/L hydrochloric acid carries out corrosion treatment, and
Iron ion etching processing is passed through on the cathode terminal surface for connecting this Cathode Foil, and the surface of cathode terminal etching multiplying power for 5 ~
10%。
In the present invention, scribble one layer of mixing material on the back side of the conductive paper, this mixing material be carbon paste, elargol with
And the homogeneous mixture of petroleum coke powder, and the ratio of carbon paste, elargol and petroleum coke powder is 1:1:2, wherein, petroleum coke powder it is suitable
It is with standard：Particle diameter≤2mm, ash≤0.5%, iron-holder≤0.1%, carbon content >=98%, sulfur content≤1%.
In the present invention, the conductive paper can also be substituted directly using aluminium foil or copper foil.
In the present invention, the adhesive is polyimides conducting resinl.
In the present invention, the consistency of thickness of the conductive filler and conductive polymer material layer, and the choosing of thickness value
Scope is selected for 600 ~ 1200 μm.
In the present invention, the averag density of cathode electrode unit and anode unit is in 0.5 ~ 1.8g/cm3Within the scope of,
And thickness≤2100 μm.
In the present invention, in the conductive polymer material layer impurity content of each component should control following scope it
It is interior：Na≤20ppm, K≤10ppm, S≤300ppm, Fe≤120ppm, P≤180ppm.
In the present invention, the insulating resin film is preferred to use phenolic resin, polyimide resin, polyether-ether-ketone resin
Or one kind in polystyrene resin, and scribble one layer 10 ~ 20 μm of dielectric film to improve it on the inside of insulating resin film
Insulation effect.
Beneficial effect：The invention provides the high aluminium electrolutic capacitor of a kind of bulky capacitor, reliability, this alminium electrolytic condenser
Device can effectively improve the charge-discharge characteristic of electric capacity, at the same can prevent near the cathode internal terminal in electrolytic capacitor for starting point
Short-circuit generation, be particularly suitable in the charge-discharge circuit that the cycle is short and voltage difference is big in use, electrolysis can be effectively improved
The performance of capacitor, extends the service life of relevant device.
Brief description of the drawings
Fig. 1 is the structural representation of embodiments of the invention.
Fig. 2 is the capacitor element expanded schematic diagram of embodiments of the invention.
Fig. 3 is cathode electrode unit cross-sectional detail figure of the invention.
Fig. 4 is anode unit cross-sectional detail figure of the invention.
Wherein：1st, capacitor element；2nd, anode terminal；3rd, cathode terminal；4th, electrolyte；5th, metal shell；6th, seal body；
7th, coating layer；8th, cathode electrode unit；9th, negative electrode conductive paper；10th, anode conducting paper；11st, anode terminal connection sheet；12nd, anode unit；
13rd, cathode terminal connection sheet；14th, bound edge；15th, Cathode Foil；16th, conductive filler；17th, insulating resin film；18th, electric conductivity is high
Molecular material layer；19th, anode foils.
Embodiment
In order that the technical means, the inventive features, the objects and the advantages of the present invention are easy to understand, tie below
Conjunction is specifically illustrating, and the present invention is expanded on further.
Referring to a kind of accompanying drawings of Fig. 1 ~ Fig. 4 solid-state aluminum electrolytic capacitor preferred embodiment, in embodiment
In, aluminium electrolutic capacitor includes capacitor element 1, and this capacitor element 1 is encapsulated in metal shell 5, meanwhile, in metal shell
Electrolyte 4 is also filled with 5, the dipping capacitor element 1 of electrolyte 4 is simultaneously closed, seal body 6 in end by seal body 6
For double-decker, its internal layer is silica column, and outer layer is butyl rubber, and the ratio between its thickness is 2:1, meanwhile, at the end of metal shell 5
End is additionally provided with the closing seal body 6 of coating layer 7.
Capacitor element 1 is double-deck winding-structure, including cathode electrode unit 8 and anode unit 12, wherein sunlight and unit
Capacitor element 1 is that double-decker winding is formed, and its anode conducting paper 10 is molded over the surface of anode unit 12, by real to aluminium foil
Erosion processing is applied, is made, anode unit 12 using anodized formation dielectric oxide film after making surface roughened
The outer rim of insulating resin film 17 be provided with bound edge 14, the flange of bound edge 14 simultaneously wraps up anode conducting paper 10, and in the position of bound edge 14
Put edge to be bonded by polyimides conducting resinl, filled with one layer of Na between anode conducting paper 10 and insulating resin film 17
≤ 20ppm, K≤10ppm, S≤300ppm, Fe≤120ppm, P≤180ppm conductive polymer material layer 18 is as conductive
Construction unit, and anode foils 19 are then molded over the medial surface of anode conducting paper 10.
Cathode Foil 15 in cathode electrode unit 8 is to be energized chemical conversion in 150V hcl corrosion liquid by 5mol/L, voltage of energizing
Aluminium etched foil, and connect the cathode terminal connection sheet 13 and the negative electrode direct-connected with cathode terminal connection sheet 13 of this Cathode Foil 15
Iron ion etching processing is passed through on the surface of terminal 3, and cathode terminal connection sheet 13 and the etching multiplying power on the surface of cathode terminal 3 are
5%, led in addition, being used as between negative electrode conductive paper 9 and the insulating resin film 17 of cathode electrode unit 8 filled with conductive filler 16
Electric structure unit.And in embodiment, the consistency of thickness of conductive filler 16 and conductive polymer material layer 18 is 1000
μm。
In embodiment one, conductive filler 16 is made up of the raw material of following component：
35 parts of coke powder
15 parts of graphous graphite powder
CO3S4 7 parts
2 parts of TCNQ copper ion complex salt
2 parts of EDTA copper ion complex salt
23 parts of coal tar pitch
By coke powder, graphous graphite powder, CO during preparation3S4, TCNQ copper ion complex salt and EDTA copper ion complexing
Salt presses mass parts proportions raw material, by fine ground be that particle diameter is 30 ~ 50 μm trickle of coke powder therein and graphous graphite powder
Grain, then together adds progress ultrasonic wave in deionized water and disperses, jitter time is 2 hours.Then by the coal after the completion of processing
Coke powder and graphous graphite powder and CO3S4, TCNQ copper ion complex salt and EDTA copper ion complex salt it is well mixed after put into
Mediated in kneader, add the coal tar pitch that temperature is 160 DEG C, softening point is 82 DEG C and thickener is made, then by thickener in inertia
The calcination process carried out 3 hours under gas condition and 1900 DEG C of temperature conditionss produces the finished product of conductive filler 16, then will
This conductive filler 16, which is filled between negative electrode conductive paper 9 and insulating resin film 17, is made cathode electrode unit 8.
And in another embodiment, conductive filler 16 is made up of the raw material of following component：
30 parts of coke powder
20 parts of graphous graphite powder
CO3S4 8 parts
3 parts of TCNQ copper ion complex salt
3 parts of EDTA copper ion complex salt
20 parts of coal tar pitch
By coke powder, graphous graphite powder, CO during preparation3S4, TCNQ copper ion complex salt and EDTA copper ion complexing
Salt presses mass parts proportions raw material, by fine ground be that particle diameter is 30 ~ 50 μm trickle of coke powder therein and graphous graphite powder
Grain, then together adds progress ultrasonic wave in deionized water and disperses, jitter time is 2 hours.Then by the coal after the completion of processing
Coke powder and graphous graphite powder and CO3S4, TCNQ copper ion complex salt and EDTA copper ion complex salt it is well mixed after put into
Mediated in kneader, add the coal tar pitch that temperature is 180 DEG C, softening point is 85 DEG C and thickener is made, then by thickener in inertia
The calcination process carried out 3 hours under gas condition and 1850 DEG C of temperature conditionss produces conductive filler finished product, then by this
Conductive filler 16, which is filled between negative electrode conductive paper 9 and insulating resin film 17, is made cathode electrode unit 8.
In an embodiment of the present invention, one layer is scribbled in negative electrode conductive paper 9 and the inner surface of anode conducting paper 10 to mix
Material, this mixing material is the homogeneous mixture of carbon paste, elargol and petroleum coke powder, the ratio of carbon paste, elargol and petroleum coke powder
Example is 1:1:2, wherein, the particle diameter of petroleum coke powder is 2mm, and ash is 0.3%, iron-holder 0.05%, phosphorus content 98%, sulfur content 1%.
In an embodiment of the present invention, the insulating resin film 17 in cathode electrode unit 8 and anode unit 12 is sub- for polyamides
Polyimide resin is made, and scribbles on the inside of it one layer 20 μm of dielectric film to improve its insulation effect, and in embodiment, negative electrode list
The averag density of member 8 is 1.2g/cm3, the averag density of anode unit 12 is 1.4g/cm3, and both thickness are 2000 μm.Separately
Outside, in the outside of metal shell 5 by potting resin covering protection, and inner side is also coated with one layer 30 μm of same sex dielectric film to keep away
Exempt from aluminum hull inner body wall directly to contact with yin, yang the two poles of the earth in capacitor core and make capacitor produce short circuit.
Because seal body 6 seals the opening portion of metal shell 5, it is provided with is stretched for anode terminal 2 and cathode terminal 3 thereon
The hole gone out, and anode terminal 2 and cathode terminal 3 in metal shell 5 respectively with anode terminal connection sheet 11 and cathode terminal
Connection sheet 13 is connected.
Under conditions of embodiment one, its fabricated capacitors is under 90 DEG C of temperature, the extreme environment of relative humidity 90%, nothing
Load ground carries out the reliability test of 1000 hours, and its sample has fluid seepage to be 0.22%, and crash rate is 0.1%.
Under conditions of embodiment two, its fabricated capacitors is under 90 DEG C of temperature, the extreme environment of relative humidity 90%, nothing
Load ground carries out the reliability test of 1000 hours, and its sample has fluid seepage to be 0.15%, and crash rate is 0.07%.
General principle, principal character and the advantages of the present invention of the present invention has been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the simply explanation described in above-described embodiment and specification is originally
The principle of invention, without departing from the spirit and scope of the present invention, various changes and modifications of the present invention are possible, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent thereof.
Claims (10)
1. a kind of solid-state aluminum electrolytic capacitor, including capacitor body and a capacitor casing with opening, its feature exist
In capacitor body carries out impregnation process by electrolyte and is fixed in capacitor casing, and the capacitor body is bilayer
In winding-structure, including cathode electrode unit and anode unit, the cathode electrode unit and anode unit respectively include anode foils and
Cathode Foil, anode foils and Cathode Foil are molded over the back of the body of two thickness for 150~300 μm of conductive papers by conductive adhesive respectively
Face, and a layer thickness is formed in the bottom of conductive paper for 500~800 μm of insulating resin films, insulating resin film is in conduction
The outside of belly edge bound edge of paper is simultaneously connected at bound edge position by adhesive；In addition, cathode electrode unit insulating resin film with
In cavity configuration between conductive paper filled with one layer by coke powder, graphous graphite powder, TCNQ copper ion complex salt and EDTA
The conductive filler that is made of copper ion complex salt；And the cavity configuration between the insulating resin film and conductive paper of anode unit
In the conductive polymer material layer filled with a strata thiophene system or polyphenylamine series.
2. a kind of solid-state aluminum electrolytic capacitor according to claim 1, it is characterised in that the Cathode Foil be by 4~
6mol/L hydrochloric acid carries out the aluminium etched foil after corrosion treatment, and connects the cathode terminal surface of this Cathode Foil by iron ion quarter
Erosion is handled, and the etching multiplying power on the surface of cathode terminal is 5~10%.
3. a kind of solid-state aluminum electrolytic capacitor according to claim 1, it is characterised in that applied on the back side of the conductive paper
Have one layer of mixing material, this mixing material is the homogeneous mixture of carbon paste, elargol and petroleum coke powder, and carbon paste, elargol and
The ratio of petroleum coke powder is 1:1:2.
4. a kind of solid-state aluminum electrolytic capacitor according to claim 3, it is characterised in that the particle diameter of the petroleum coke powder≤
2mm, ash≤0.5%, iron-holder≤0.1%, carbon content >=98%, sulfur content≤1%.
5. a kind of solid-state aluminum electrolytic capacitor according to claim 1, it is characterised in that the adhesive is polyimides
Conducting resinl.
6. a kind of solid-state aluminum electrolytic capacitor according to claim 1, it is characterised in that the conductive filler and conduction
Property polymer material layer consistency of thickness, and thickness value range of choice be 600~1200 μm.
7. a kind of solid-state aluminum electrolytic capacitor according to claim 1, it is characterised in that cathode electrode unit and anode unit
Averag density be in 0.5~1.8g/cm3Within the scope of, and thickness≤2100 μm.
8. a kind of solid-state aluminum electrolytic capacitor according to claim 1, it is characterised in that the conductive polymer material
The impurity content of each component should be controlled within the scope of following in layer：Na≤20ppm, K≤10ppm, S≤300ppm, Fe≤
120ppm, P≤180ppm.
9. a kind of solid-state aluminum electrolytic capacitor according to claim 1, it is characterised in that the insulating resin film is used
One kind in phenolic resin, polyimide resin, polyether-ether-ketone resin or polystyrene resin, and in insulating resin film
Side scribbles one layer 10~20 μm of dielectric film to improve its insulation effect.
10. a kind of preparation method of conductive filler, it is characterised in that the raw material including following components and mass parts：
30~40 parts of coke powder
15~20 parts of graphous graphite powder
Co3S45~8 parts
2~3 parts of TCNQ copper ion complex salt
2~3 parts of EDTA copper ion complex salt
20~25 parts of coal tar pitch
Include operating procedure in detail below during preparation：
1., by coke powder, graphous graphite powder, Co3S4, TCNQ copper ion complex salt and EDTA copper ion complex salt press matter
Measure part proportions raw material；
2., by coke powder and graphous graphite powder it is fine ground be fine particle that particle diameter is 30~50 μm, then together add deionization
Carry out ultrasonic wave in water to disperse, jitter time is dry, standby after 2 hours；
3., by the coke powder and graphous graphite powder and Co of step 2. middle processing3S4, TCNQ copper ion complex salt and EDTA
Mediated after copper ion complex salt is well mixed in input kneader, add temperature be 160~180 DEG C, softening point be 0~85 DEG C
Coal tar pitch be made thickener；
4., the thickener by step 3. middle preparation is roasted under inert gas conditions and 1700~1900 DEG C of temperature conditionss
Burn, 3 hour aftershapings of roasting produce conductive filler finished product.
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| US7113390B2 (en) * | 2004-01-27 | 2006-09-26 | Nec Tokin Corporation | Surface-mount thin-profile capacitor and method of producing the same |
| CN101329954A (en) * | 2008-07-14 | 2008-12-24 | 钰邦电子（无锡）有限公司 | Chip-shaped solid electrolytic capacitor |
| JP5247495B2 (en) * | 2009-01-23 | 2013-07-24 | 三洋電機株式会社 | Solid electrolytic capacitor |
| CN203312043U (en) * | 2013-05-31 | 2013-11-27 | 佛山市三水日明电子有限公司 | Solid electrolyte aluminum electrolytic capacitor for AC circuit |
| CN104319105A (en) * | 2014-10-28 | 2015-01-28 | 钰邦电子（无锡）有限公司 | Solid electrolytic capacitor with improved metal anode and manufacturing method thereof |
| CN204215904U (en) * | 2014-10-28 | 2015-03-18 | 钰邦电子（无锡）有限公司 | Chip-shaped solid electrolytic capacitor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2014072361A (en) * | 2012-09-28 | 2014-04-21 | Asahi Kasei Fibers Corp | Separator for electric capacitor |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7113390B2 (en) * | 2004-01-27 | 2006-09-26 | Nec Tokin Corporation | Surface-mount thin-profile capacitor and method of producing the same |
| CN101329954A (en) * | 2008-07-14 | 2008-12-24 | 钰邦电子（无锡）有限公司 | Chip-shaped solid electrolytic capacitor |
| JP5247495B2 (en) * | 2009-01-23 | 2013-07-24 | 三洋電機株式会社 | Solid electrolytic capacitor |
| CN203312043U (en) * | 2013-05-31 | 2013-11-27 | 佛山市三水日明电子有限公司 | Solid electrolyte aluminum electrolytic capacitor for AC circuit |
| CN104319105A (en) * | 2014-10-28 | 2015-01-28 | 钰邦电子（无锡）有限公司 | Solid electrolytic capacitor with improved metal anode and manufacturing method thereof |
| CN204215904U (en) * | 2014-10-28 | 2015-03-18 | 钰邦电子（无锡）有限公司 | Chip-shaped solid electrolytic capacitor |
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