CN100550239C - Electrolytic capacitor - Google Patents
Electrolytic capacitor Download PDFInfo
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- CN100550239C CN100550239C CNB2003801029098A CN200380102909A CN100550239C CN 100550239 C CN100550239 C CN 100550239C CN B2003801029098 A CNB2003801029098 A CN B2003801029098A CN 200380102909 A CN200380102909 A CN 200380102909A CN 100550239 C CN100550239 C CN 100550239C
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Abstract
The invention provides a kind of electrolytic capacitor, have low impedance characteristic, also have the high voltage endurance of 100V level, moisture-proof, life characteristics at high temperature are also good.As this separator, separator that constitutes by thermal endurance synthetic resin such as polyester, polypropylene, polyethylene, polyamide, vinylon, artificial silks or the mixed copy paper that contains glass fibre have been adopted, thereby having low impedance characteristic, high voltage endurance, moisture-proof, life characteristics at high temperature are also good.
Description
Technical field
The present invention relates to electrolytic capacitor, relate in particular to electrolytic capacitor with low impedance characteristic and high voltage endurance.
Technical background
Electrolytic capacitor is generally structure shown in Figure 1.Promptly anode electrode paper tinsel 2 and cathode electrode foil 3 being clipped the separator 11 that is made of Manila paper rolls, form capacitor element 1, wherein, highly purified aluminium foil to band shape carries out chemistry or electrochemical etch process, aluminium foil surface is enlarged, and in chemical conversion liquid such as ammonium borate aqueous solution, this aluminium foil is carried out chemical conversion and handle, make the surface form the oxide skin rete, as anode electrode paper tinsel 2; Highly purified aluminium foil is only carried out etch processes, as cathode electrode foil 3.And, after this capacitor element 1 drives the electrolyte of usefulness at the impregnation electrolytic capacitor, be accommodated in the outer dress box body 10 that bottom tube-like is arranged that constitutes by aluminium etc.Adorn the peristome of box body 10 outside the seal body 9 that is made of elastic caoutchouc is installed, outer dress box body 10 is sealed by deep-draw processing.
On anode electrode paper tinsel 2, cathode electrode foil 3, as shown in Figure 2, adopt sew on, method such as ultrasonic fusing is connected with as the lead-in wire 4,5 of electrode ejector that is used for respectively pulling out to the outside electrode at the two poles of the earth.As the lead-in wire 4,5 of each electrode ejector, comprise round bar part 6 that constitutes by aluminium and the connecting portion 7 that contacts with the two poles of the earth electrode foil 2,3, and at the front end of round bar part 6, but be fixed with the external connecting 8 that the metal by soldering constitutes with methods such as weldings.
, drive the electrolyte of usefulness herein, used following material: be main solvent with gamma-butyrolacton as the electrolytic capacitor with high conductivity of impregnation in the capacitor element; As solute, the ring-type amidine compound is carried out the cation of level Four gained, be that imidazoline cation and glyoxaline cation are as cation constituent, the conjugate base of acid as anion component, is used the material (opening flat 08-321440 communique and the flat 08-321441 communique of Te Kai with reference to the spy) after the salt that obtains like this dissolves.
Yet in recent years, electronic message unit was moving towards digitlization, and the heart portion of these electronic message units, and promptly the driving frequency of microprocessor is being moved towards high speed.Thereupon, the consumed power of the electronic component of peripheral circuit constantly increases, and the increase of the pulsating current of following therewith becomes significantly, and the electrolytic capacitor of using in this circuit is just required low impedance characteristic.
Also have, particularly in automotive field,, very high to the requirement of aforesaid low impedance characteristic along with the high performance of automotive performance.The driving voltage of vehicle mounted circuit is 14V, and but, along with the increase of consumed power, to 42V development, for corresponding with this driving voltage, the voltage endurance of electrolytic capacitor needs 28V, more than the 84V.And the requirement that has high temperature to use in this field requires life characteristics at high temperature to electrolytic capacitor.
Yet above-mentioned electrolytic capacitor can not corresponding this low impedance characteristic, also has, and is limited to 30V on withstand voltage, though can corresponding 28V, can not satisfy the high withstand voltage requirement more than the 84V.Also have, this electrolytic capacitor is also required the moisture-proof the same with semiconductor, the moisture-proof of above-mentioned electrolytic capacitor is also low, and this is the problem that exists.
Summary of the invention
Therefore, the object of the invention is to provide a kind of low impedance characteristic that has, and also has the high voltage endurance of 100V level, the electrolytic capacitor that life characteristics at high temperature, moisture-proof are also good.
First electrolytic capacitor of the present invention is characterised in that to have: the capacitor element that rolls anode electrode paper tinsel, cathode electrode foil and separator and make its impregnation electrolyte to form; Take in the outer dress box body of this capacitor element; And,, adopted the electrolyte that contains tetrafluoride aluminium salt as above-mentioned electrolyte to the seal body that peristome of this outer dress box body seals, and, as above-mentioned separator, adopted by thermal endurance synthetic resin or contained the separator that the mixed copy paper of glass fibre constitutes.
Description of drawings
Fig. 1 is the internal view of the structure of expression electrolytic capacitor, and Fig. 2 is the decomposition diagram of the structure of expression capacitor element.
Embodiment
The structure of aluminium electrolytic capacitor adopts and former same structure as shown in Figure 1 and Figure 2.Capacitor element 1 folder Jie separator 11 rolls anode electrode paper tinsel 2 and cathode electrode foil 3 and form.Also have, as shown in Figure 2, anode electrode paper tinsel 2, cathode electrode foil 3 are connected with lead-in wire 4, lead-in wire 5 as anode ejector and negative electrode ejector respectively.These the lead-in wire 4, the lead-in wire 5 by the connecting portion 7 that is connected with each paper tinsel, and connecting portion 7 in succession round bar part 6 and with round bar part 6 weldings external connecting 8 constitute.In addition, each paper tinsel mechanically is connected by method of sewing on or ultrasonic fusing etc. with lead-in wire.
The aluminium foil of purity more than 99% carried out chemistry or chemical etching in acid solution, carries out in the aqueous solution of ammonium borate or ammonium adipate etc., carrying out chemical conversion and handling after expansion face handles, make its surface form the oxide skin rete, with it as anode electrode paper tinsel 2.
And, impregnation the capacitor element 1 of electrolyte be accommodated in the outer dress box body 10 that constitutes by the aluminium that bottom tube-like is arranged, seal body 9 with the through hole of deriving lead-in wire 4,5 is inserted the peristome of outer dress box body 10, tied tight in the end of outer dress box body 10 again and carry out sealing of electrolytic capacitor.
And, in the present invention,, use the separator that constitutes by thermal endurance synthetic resin as above-mentioned separator.As this separator, can enumerate weave cotton cloth, nonwoven fabrics, paper, multiple aperture plasma membrane.Promptly can enumerate and adopt from polyester, polyamide, vinylon, artificial silk, and the weaving cotton cloth of the macromolecular fibre of choosing in aromatic polyamides, polyethylene terephthalate, Polyethylene Naphthalate, polyphenylene sulfide, Wholly aromatic polyester, polyimides, polyamidoimide, PABM, polyvinyl fluoride, Kynoar, poly-(ethylene-tetrafluoroethylene), the polyvinyl fluoride fork etc., nonwoven fabrics or paper, and these high molecular multiple aperture plasma membranes have been adopted.And, also can be epoxy resin, phenolic resins, polyurethane resin, melamine resin as bonding agent.Herein, thermal endurances such as polypropylene, polyethylene are low, and hot strength is low, thereby are difficult to be rolled into capacitor element, because of rather than preferred.
The electrolyte for electrolytic capacitor that the present invention is used contains tetrafluoride aluminium salt.
Tetrafluoride aluminium salt is to be the salt of anion component with tetrafluoride aluminium, as this salt, can adopt ammonium salt, amine salt, 4 grades of ammonium salts or is the salt of cation constituent with level Four ring-type amidine [ア ミ ジ ニ ウ system] ion.As the amine that constitutes amine salt, can enumerate: primary amine (methylamine, ethamine, propylamine, butylamine, ethylenediamine hydrate, monoethanolamine etc.), secondary amine (dimethylamine, diethylamine, di-n-propylamine, ethylmethylamine, diphenylamines, diethanol amine etc.), tertiary amine (trimethylamine, triethylamine, tri-n-butylamine, triethanolamine etc.).Also have, as the 4th grade of ammonium that constitutes the 4th grade of ammonium salt, can enumerate tetraalkyl quaternary ammonium (tetramethylammonium, etamon, tetrapropylammonium, tetrabutylammonium, methyl three second ammoniums, dimethyl diethyl ammonium etc.), pyridium (1-picoline nurse, 1-ethylpyridine nurse, 1,3-parvoline nurse etc.).
And, in the salt of level Four ring-type amidine as cation constituent, the level Four ring-type amidine that constitutes cation constituent is having N, N, the cyclic compound of N '-displacement amidino groups has carried out the cation of level Four gained, as having N, N, the cyclic compound of N '-displacement amidino groups can be enumerated following compound.Imidazoles monocyclic compound (1-methylimidazole, the 1-phenylimidazole, 1, the 2-methylimidazole, 1-ethyl-glyoxal ethyline, 2-ethyl-1-methylimidazole, 1,2-diethyl imidazoles, 1,2, the similar bodies of imidazoles such as 4-tri-methylimidazolium, 1-methyl-2-hydroxymethyl imidazoles [1-メ チ Le-2-オ キ シ メ チ Le イ ミ ダ ゾ one Le], 1-methyl-hydroxyl alkali redundant organisms such as 2-hydroxyethyl imidazoles, nitro redundant organisms such as 1-methyl-4 (5)-nitroimidazole, 1, amino redundant organisms such as 2-dimethyl 5 (4)-aminooimidazoles etc.), benzimidazole compound (1-tolimidazole, 1-methyl-2-benzyl benzimidazole, 1-methyl-5 (6)-nitrobenzimidazole etc.), compound (1-methylimidazole quinoline with 2-imidazoline ring, 1,2-methylimidazole quinoline, 1,2,4-tri-methylimidazolium quinoline, 1-methyl-2-benzylimidazoline, 1-ethyl-glyoxal ethyline quinoline, 1,4-dimethyl-2-ethyl imidazol(e) quinoline, 1-methyl-2-ethoxyl methyl imidazoline etc.), compound (1-methyl isophthalic acid with tetrahydropyrimidine ring, 4,5, the 6-tetrahydropyrimidine, 1,2-dimethyl-1,4,5, the 6-tetrahydropyrimidine, 1,8-diazabicylo (5,4,0) endecatylene-7,1,5-diazabicylo (4,3,0) nonene-5 etc.) etc.
And,, can adopt protic polar solvent, non-protonic solvent and their mixture as the used solvent of electrolyte of the present invention.As the protic polar solvent, can enumerate monovalence alcohols (ethanol, propyl alcohol, butanols, amylalcohol, hexanol, cyclobutanol, cyclopentanol, cyclohexanol, phenmethylol etc.), multivalence alcohols and contain oxygen alcoholic compound class (ethylene glycol, propylene glycol, glycerine, methyl match fine jade Suo Fu, ethyl match fine jade Suo Fu, MPEG, dimethoxy propyl alcohol etc.) etc.Also have, polar solvent as non-proton property, can enumerate amide-type (N-methylformamide as representative, N, dinethylformamide, the N-ethyl-formamide, N, the N-diethylformamide, the N-methylacetamide, N, the N-dimethylacetylamide, the N-ethyl acetamide, N, the N-diethyl acetamide, hexamethyl phosphoric acid acetamide etc.), lactone (gamma-butyrolacton, gamma-valerolactone, δ-Wu Neizhi etc.), sulfolane class (sulfolane, the 3-methyl sulfolane, 2, the 4-dimethylsulfolane), cyclic amide (N-N-methyl-2-2-pyrrolidone N-etc.), carbonates (vinyl carbonate, propylene carbonate, different vinyl carbonate etc.), nitrile (methane cyanide acetonitrile etc.), sulfoxide class (dimethyl sulfoxide (DMSO) etc.) etc., 2-imidazolidine ketone (1,3-two bases-2-imidazolidinone (1,3-dimethyl-2-imidazolidinone, 1,3-diethyl-2-imidazolidinone, 1,3-two (n-propyl group)-2-imidazolidinone etc.), 1,3,4-three bases-2-imidazolidinone (1,3,4-trimethyl-2-imidazolidinone etc.)) etc.Wherein, adopt gamma-butyrolacton, impedance operator will improve, thereby is preferred, adopt sulfolane, 3-methyl sulfolane, 2, the 4-dimethylsulfolane, hot properties will improve, thereby is preferred, adopt ethylene glycol, voltage endurance will improve, thereby is preferred.
As mentioned above, electrolytic capacitor of the present invention, owing to adopted the electrolyte that contains tetrafluoride aluminium salt, thereby have low impedance characteristic, a high voltage endurance, and adopted the separator that constitutes by thermal endurance synthetic resin, thereby the moisture of sneaking into to electrolyte from separator is few, and life characteristics at high temperature is good.Promptly, use by before Manila paper constitute the occasion of separator, produce moisture from separator, it is big that the electrolyte that the present invention is used and the reactivity of electrode foil become, life characteristic has been brought influence, but, the generation of this moisture can be suppressed among the present invention, the good high-temperature life characteristic can be obtained.And moisture-proof is also good.
The high voltage endurance that above first electrolytic capacitor of the present invention has low impedance characteristic and 100V level, life characteristics at high temperature, moisture-proof are also good.
Secondly, second electrolytic capacitor of the present invention is described, this electrolytic capacitor is characterised in that to have: the capacitor element that rolls anode electrode paper tinsel, cathode electrode foil and separator and make its impregnation electrolyte to form; Take in the outer dress box body of this capacitor element; And,, adopted the electrolyte that contains tetrafluoride aluminium salt as above-mentioned electrolyte to the seal body that this outer peristome of adorning box body seals, and, as above-mentioned separator, adopted the mixed copy paper that contains glass fibre.
The formation of electrolytic capacitor is identical with first electrolytic capacitor, but, in the present invention, as above-mentioned separator, has adopted the mixed copy paper that contains glass fibre.As mixing the fiber copy, can adopt synthetic fibers such as paper pulp fiber such as Manila paper, brown paper and polyester fiber, polyethylene fibre, polypropylene fibre, polyvinyl fluoride fibre, Fypro., adopt the separator that only is made of glass fibre herein, the thickness of separator will increase, and the impedance of electrolytic capacitor will increase, so can not obtain the effect of electrolytic capacitor of the present invention.
As mentioned above, electrolytic capacitor of the present invention is owing to adopted the electrolyte that contains tetrafluoride aluminium salt, thereby have low impedance characteristic, a high voltage endurance, and adopted the mixed copy paper that contains glass fibre, thereby the moisture of sneaking into to electrolyte from separator is few, life characteristics at high temperature is good.Promptly, use by before Manila paper etc. constitute the occasion of separator, produce moisture from separator, it is big that the electrolyte that the present invention is used and the reactivity of electrode foil become, life characteristic has been brought influence, but, the generation of this moisture can be suppressed among the present invention, the good high-temperature life characteristic can be obtained.And moisture-proof is also good.
The high voltage endurance that above second electrolytic capacitor of the present invention has low impedance characteristic and 100V level, moisture-proof is also good.Also have, life characteristics at high temperature is also good.
Have again, in first to second electrolytic capacitor of the present invention,, adopt and carried out the electrode foil that phosphoric acid is handled as electrode foil.Only also have effect of the present invention with a kind of in anode electrode paper tinsel, the cathode electrode foil, but, the words that the both uses just can suppress the deterioration of two electrode foils, thereby common both's usefulness.Usually highly purified aluminium foil is carried out chemistry or electrochemical etch process, as etched foil, but, as electrode foil of the present invention, adopt the etched foil of carrying out aqueous phosphatic impregnation processing gained in the etched pre-treatment of interchange, intermediate treatment or the reprocessing in this etching work procedure as cathode electrode foil.And, to this etched foil, or do not carry out the etched foil that phosphoric acid handles and carry out phosphoric acid chemistry conversion process, perhaps before chemical conversion, in the middle or reprocessing, carry out the phosphoric acid impregnation and handle, the electrode foil of gained as the anode electrode paper tinsel.
Also have, add phosphorus compound in above-mentioned electrolyte for electrolytic capacitor, effect of the present invention will improve.As this phosphorus compound, can enumerate following material.Orthophosphoric acid, phosphorous acid, ortho phosphorous acid and their salt as their salt, have ammonium salt, aluminium salt, sodium salt, calcium salt, sylvite.Can also enumerate phosphate cpds such as etherophosphoric acid, diethyl phosphate, butylphosphoric acid ester, dibutylphosphoric acid ester, 1-hydroxy ethylidene-1, phosphinic acid compounds such as 1-di 2 ethylhexyl phosphonic acid, Amino Trimethylene Phosphonic Acid, phenyl-phosphonic acid etc.Can also enumerate hypophosphorous acid methyl esters, hypophosphorous acid butyl ester grade phosphate cpd.
Can also enumerate following condensed phosphoric acid or their salt.Straight chain shape condensed phosphoric acids such as pyrophosphoric acid, tripolyphosphate, four polyphosphoric acids, cyclic condensation phosphoric acid such as metaphosphoric acid, hexa metaphosphoric acid, or the material of this chain, cyclic condensation phosphoric acid be combined into.And,, can adopt ammonium salt, aluminium salt, sodium salt, calcium salt, sylvite etc. as the salt of these condensed phosphoric acids.
Addition is 0.05～3wt%, preferably 0.1～2wt%.
The high voltage endurance that above electrolytic capacitor of the present invention has low impedance characteristic and 100V level, life characteristics at high temperature is better.Promptly, adopt tetrafluoride aluminium salt, carried out experiment of high-temperature load, the result is because the moisture in the electrolyte, it is big that the reactivity of electrolyte and electrode foil becomes, characteristic has been brought influence, but, because above electrolytic capacitor has adopted the electrode foil of handling through phosphoric acid, thereby the reaction of electrolyte and electrode foil is suppressed, and life characteristics at high temperature is more stable.
Also have, same, in the present invention, in the buttress rubber polymer that the copolymer by isobutene, isoprene and divinylbenzene constitutes, added peroxide as crosslinking agent, form the partial cross-linked buttress rubber of peroxide, with it as seal body.As the vulcanizing agent that peroxide vulcanization is used, can enumerate ketone peroxide class, ketal peroxide class, hydrogen peroxide class, dialkyl peroxide, diazine peroxide, peroxy dicarbonates, peroxyesters etc.Specifically can enumerate 1,1-pair-t-butylperoxy-3,3,5-trimethyl cyclohexane [1,1-PVC ス-t-Block チ Le パ one オ キ シ-3,3,5-ト リ メ チ Le シ Network ロ ヘ キ サ Application], n-butyl-4,4-two-t-butylperoxy valethamate bromide [n-Block チ Le-4,4-PVC ス-t-Block チ Le パ one オ キ シ バ レ レ one ト], two trimethyl peroxidating benzoic acids [ジ Network ミ Le パ one オ キ サ イ De], t-butyl peroxybenzoate [t-Block チ Le パ one オ キ シ ベ Application ゾ エ one ト], two-peroxide tert-butyl ester [ジ-t-Block チ Le パ one オ キ サ イ De], benzoyl peroxide [ベ Application ゾ イ Le パ-オ キ サ イ De], 1, two (t-butylperoxy-different third) benzene [1 of 3-, 3-PVC ス (t-Block チ Le パ one オ キ シ-イ ソ プ ロ ピ Le) ベ Application ゼ Application], 2,5-dimethyl-2,5-two-t-butyl peroxy ethyl-acetylene-3[2,5-ジ メ チ Le-2,5-ジ-t-Block チ Le パ one オ キ シ Le ヘ キ シ Application-3], t-butylperoxy cumene [t-Block チ Le パ one オ キ シ Network メ Application], α, α '-two (t-butylperoxy) diisopropyl benzene [α, α '-PVC ス (t-Block チ Le パ one オ キ シ) ジ イ ソ プ ロ ピ Le ベ Application ゼ Application] etc.
Aforesaid electrolytic capacitor of the present invention, in the buttress rubber polymer that the copolymer by isobutene, isoprene and divinylbenzene constitutes, added peroxide as crosslinking agent, form the partial cross-linked buttress rubber of peroxide, with it as seal body, adopted the electrolyte that contains tetrafluoride aluminium salt, thereby high voltage endurance with low impedance characteristic and 100V level, because the good high-temperature characteristic that seal body that uses among the present invention and electrolyte have, thereby life characteristics at high temperature further improves.
Also have, in the former level Four ring-type amidine compound, that produce and reaction hydroxyl ion can cause the leakage tendency near the negative electrode ejector, but in the present invention, can think seal body through hole and the lead-in wire between have good sealing property, and electrolyte that uses among the present invention and hydroxyl ion is reactive low, and their synergism can prevent the leakage state.
Embodiment
Secondly, with embodiment first invention is described.The structure of electrolytic capacitor is and former identical construction, describes with reference to Fig. 1, Fig. 2.Capacitor element 1 folder Jie separator 11 rolls anode electrode paper tinsel 2 and cathode electrode foil 3 and form.Also have, as shown in Figure 2, anode electrode paper tinsel 2, cathode electrode foil 3 are drawn to draw with going between with lead-in wire 4, negative electrode with anode respectively and 5 are connected.
The round bar part 6 that these lead-in wires 4,5 form as one by the connecting portion 7 that joins with each paper tinsel, with connecting portion 7 and constitute with the bonding external connecting 8 of the front end of round bar part 6.Also have, connecting portion 7 and round bar part 6 are made of 99% aluminium, and external connecting 8 is made of copper coated iron wire (hereinafter referred to as the CP line).On the surface of this lead-in wire round bar part at least 6 of 4,5, handle through the chemical conversion of ammonium phosphate solution, form the anodic oxide coating that constitutes by aluminium oxide.This lead-in wire 4,5 adopts respectively at connecting portion 7 and sews on or method such as ultrasonic fusing and be electrically connected on the two poles of the earth electrode foil 2,3.
Anode electrode paper tinsel 2 adopts following paper tinsel: the aluminium foil of purity 99.9% is carried out chemistry or chemical etching in acid solution, carry out carrying out chemical conversion and handle in the ammonium adipate aqueous solution after the processing of expansion face, form the anodic scale rete on its surface.
And, impregnation the capacitor 1 of electrolyte be accommodated in the outer dress box body 10 that constitutes by the aluminium that bottom tube-like is arranged, adorns the peristome of box body 10 outside seal body 9 is installed, and the end of externally adorning box body 10 carries out deep-draw processing, seal adorning box body 10 outward.Seal body 9 has the through hole of deriving lead-in wire 4,5 respectively.
And,, adopted separator that constitutes by polyethylene terephthalate (PET) and the separator that constitutes by the Manila paper of using in the past as separator.
As electrolyte A, having adopted with gamma-butyrolacton (accounting for 75) is that solvent has dissolved the 1-ethyl-2 as solute, 3-methylimidazole quinoline tetrafluoride aluminium salt [1-エ チ Le-2,3-ジ メ チ Le イ ミ ダ ゾ リ ニ ウ system four is not changed ア Le ミ ニ ウ ム salt] electrolyte of (accounting for 25), as electrolyte B, having adopted with gamma-butyrolacton (accounting for 80) is that solvent has dissolved the 1-ethyl-2 as solute, the electrolyte of 3-methylimidazole quinoline (accounting for 20).In addition, use electrolyte solution C as before containing, having adopted with gamma-butyrolacton (accounting for 75) is that solvent has dissolved the 1-ethyl-2 as solute, the electrolyte of 3-methylimidazole quinoline anhydride phthalic acid salt (accounting for 25).
The rated voltage of the electrolytic capacitor of above-mentioned formation is 16V for the electrolytic capacitor that has adopted electrolyte A, C, is 100V for the electrolytic capacitor that has adopted electrolyte B.Estimated the characteristic of these electrolytic capacitors.Experimental condition is 125 ℃, 2000 hours loads, and 105 ℃, 2000 hours are zero load.(table 1-1)～(table 1-4) represents this result.
(table 1-1)
(table 1-2)
(table 1-3)
(table 1-4)
By (table 1-1), as can be seen, the electrolytic capacitor of embodiment 1 is compared with comparative example 1,2 (table 1-2), tan δ is low, the variation of 125 ℃ tan δ is little, life characteristics at high temperature is good.And, by (table 1-3), (table 1-4) as can be seen, initial stage characteristic, the life characteristic of rated voltage 100V are also good.The electrolytic capacitor of the 100V level of the low impedance characteristic that has not had before having realized having.
Secondly, for the electrolytic capacitor of embodiment 1, comparative example 1, estimated the moisture-proof characteristic.Experimental condition is that 85 ℃, 85%RH, 1000 hours are zero load.(table 1-5) represents this result.
(table 1-5)
By (table 1-5) as can be seen, electrolytic capacitor of the present invention, the static capacity after the humidity test changes, all characteristics of loss tangent of an angle are good, and electrolytic capacitor of the present invention has improved moisture-proof.
Secondly, second electrolytic capacitor of the present invention is described.The formation of electrolytic capacitor is identical with first electrolytic capacitor, and it is also identical to estimate characteristic, but, as separator, has adopted mixed copy paper that contains glass fibre and the separator that is made of the Manila paper of using in the past.(table 2-1)～(table 2-4) represents this result.
(table 2-1)
(table 2-2)
(table 2-3)
(table 2-4)
By (table 2-1), as can be seen, the electrolytic capacitor of embodiment is compared with comparative example (table 2-2), tan δ is low, the variation of 125 ℃ tan δ is little, life characteristics at high temperature is good.And, by (table 2-3), (table 2-4) as can be seen, initial stage characteristic, the life characteristic of rated voltage 100V are also good.The electrolytic capacitor of the 100V level of the low impedance characteristic that has not had before having realized having.
Secondly, for the electrolytic capacitor of embodiment 3, comparative example 4, estimated the moisture-proof characteristic.Experimental condition is that 85 ℃, 85%RH, 4000 hours are zero load.(table 2-5) represents this result.
(table 2-5)
By (table 2-5) as can be seen, electrolytic capacitor of the present invention, the static capacity after the humidity test changes, all characteristics of loss tangent of an angle are good, and electrolytic capacitor of the present invention has improved moisture-proof.
And, in first, second above electrolytic capacitor, as anode electrode paper tinsel or cathode electrode foil, implemented the occasion of the electrode foil of phosphoric acid processing in employing, life characteristics at high temperature further improves, and adds phosphorus compound again in electrolyte, and life characteristics at high temperature also can improve.Also have, in the buttress rubber polymer that the copolymer by isobutene, isoprene and divinylbenzene constitutes, added peroxide, form the partial cross-linked buttress rubber of peroxide, as seal body, improved the leakage characteristic with it as crosslinking agent.
Industrial applicibility
According to the present invention, owing to adopted the electrolytic capacitor electrolysis that contains tetrafluoride aluminium salt Liquid, and, as separation layer, adopted the separation layer that is consisted of by heat resistance synthetic resin or contained The mixed copy paper of glass fibre, thus can provide have low impedance characteristic, high voltage endurance, height Temperature life characteristic, moisture-proof be good electrolytic capacitor also.
Claims (4)
1. electrolytic capacitor is characterised in that to have: the capacitor element that rolls anode electrode paper tinsel, cathode electrode foil and separator and make its impregnation electrolyte to form; Take in the outer dress box body of this capacitor element; And the seal body that peristome of this outer dress box body is sealed, as described electrolyte, adopted that to contain tetrafluoride aluminium be anion component, level Four ring-type amidine is the electrolyte of the salt of cation constituent, and,, adopted the separator that constitutes by thermal endurance synthetic resin as described separator, wherein, described thermal endurance synthetic resin does not comprise polyethylene, polypropylene.
2. electrolytic capacitor is characterised in that to have: the capacitor element that rolls anode electrode paper tinsel, cathode electrode foil and separator and make its impregnation electrolyte to form; Take in the outer dress box body of this capacitor element; And the seal body that peristome of this outer dress box body is sealed, as described electrolyte, adopted that to contain tetrafluoride aluminium be anion component, level Four ring-type amidine is the electrolyte of the salt of cation constituent, and,, adopted the mixed copy paper that contains glass fibre as described separator.
3. electrolytic capacitor according to claim 1 and 2 wherein, as anode electrode paper tinsel or cathode electrode foil, adopts and has implemented the electrode foil that phosphoric acid is handled.
4. electrolytic capacitor according to claim 1 and 2, wherein, in the buttress rubber polymer that the copolymer by isobutene, isoprene and divinylbenzene constitutes, added peroxide as crosslinking agent, form the partial cross-linked buttress rubber of peroxide, with it as seal body.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP326019/2002 | 2002-11-08 | ||
| JP2002326019A JP2004165209A (en) | 2002-11-08 | 2002-11-08 | Electrolytic capacitor |
| JP326028/2002 | 2002-11-08 | ||
| JP326720/2002 | 2002-11-11 | ||
| JP326718/2002 | 2002-11-11 |
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| Publication Number | Publication Date |
|---|---|
| CN1711615A CN1711615A (en) | 2005-12-21 |
| CN100550239C true CN100550239C (en) | 2009-10-14 |
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| CNB2003801029134A Expired - Fee Related CN100452258C (en) | 2002-11-08 | 2003-11-07 | Electrolytic capacitor manufacturing method |
| CNB2003801029098A Expired - Fee Related CN100550239C (en) | 2002-11-08 | 2003-11-07 | Electrolytic capacitor |
| CN200380100729.6A Expired - Fee Related CN1692459B (en) | 2002-11-08 | 2003-11-07 | Electrolyte for electrolytic capacitor and electrolytic capacitor containing the same |
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| CN105814652A (en) * | 2014-09-03 | 2016-07-27 | 株式会社Tbk | Retarder electromagnetic coil |
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|---|---|---|---|---|
| JP5590522B2 (en) * | 2007-12-05 | 2014-09-17 | 国立大学法人長岡技術科学大学 | Ternary copolymers comprising isobutene, isoprene, and styrylisoprene, methods for producing the same, and sealing bodies for electrolytic capacitors |
| JP6984283B2 (en) * | 2017-09-28 | 2021-12-17 | 日本ケミコン株式会社 | Gel electrolytic capacitor |
| JP7206758B2 (en) * | 2018-09-28 | 2023-01-18 | 日本ケミコン株式会社 | Method for estimating lifetime of capacitor, program for estimating lifetime thereof, information processing device, and capacitor |
| CN112582176B (en) * | 2020-11-10 | 2021-09-07 | 西安交通大学 | Method for improving specific volume and hydration resistance of low-voltage anodized formed foil of aluminum electrolytic capacitor |
| CN112582177B (en) * | 2020-11-10 | 2021-11-19 | 西安交通大学 | Method for improving specific volume and hydration resistance of high-voltage anodized formed foil in aluminum electrolytic capacitor |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1039264C (en) * | 1993-12-03 | 1998-07-22 | 三洋化成工业株式会社 | Electrolytic solution and electrochemical element prepared therefrom |
| JP2907718B2 (en) * | 1993-12-29 | 1999-06-21 | 昭和アルミニウム株式会社 | Etching method of aluminum foil for electrolytic capacitor electrode |
| JP3220620B2 (en) * | 1995-05-26 | 2001-10-22 | 松下電器産業株式会社 | Aluminum electrolytic capacitor |
| CN101261900B (en) * | 2001-05-11 | 2011-02-02 | 三菱化学株式会社 | Electrolyte for electrolytic capacitor and electrolytic capacitor using the same |
-
2002
- 2002-11-08 JP JP2002326019A patent/JP2004165209A/en active Pending
-
2003
- 2003-11-07 CN CNB2003801029134A patent/CN100452258C/en not_active Expired - Fee Related
- 2003-11-07 CN CNB2003801029098A patent/CN100550239C/en not_active Expired - Fee Related
- 2003-11-07 CN CN200380100729.6A patent/CN1692459B/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105814652A (en) * | 2014-09-03 | 2016-07-27 | 株式会社Tbk | Retarder electromagnetic coil |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2004165209A (en) | 2004-06-10 |
| CN1711617A (en) | 2005-12-21 |
| CN1711615A (en) | 2005-12-21 |
| CN1692459A (en) | 2005-11-02 |
| CN100452258C (en) | 2009-01-14 |
| CN1692459B (en) | 2010-05-12 |
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