CN105140033B - A kind of medium-high voltage aluminum electrolytic capacitor Working electrolyte and preparation method thereof - Google Patents
A kind of medium-high voltage aluminum electrolytic capacitor Working electrolyte and preparation method thereof Download PDFInfo
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- CN105140033B CN105140033B CN201510557626.7A CN201510557626A CN105140033B CN 105140033 B CN105140033 B CN 105140033B CN 201510557626 A CN201510557626 A CN 201510557626A CN 105140033 B CN105140033 B CN 105140033B
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Abstract
The present invention relates to a kind of medium-high voltage aluminum electrolytic capacitor Working electrolyte and preparation method thereof, composition includes：By weight percentage, solvent 70%~90%, solute 9%~29%, hydrate inhibitor 0.1~1% and hydrogen absorber 0.1~1%.Preparation method includes：(1) by weight percentage, solvent is heated to 60~90 DEG C, adds solute, be heated with stirring to 85~95 DEG C and be completely dissolved；(2) solution of step (1) is added into hydrate inhibitor, is heated to 95~145 DEG C；85~95 DEG C are subsequently cooled to, adds hydrogen absorber, obtains electrolyte.Instant invention overcomes electrolytic capacitor, capacitance declines greatly under high-temperature load, after high temperature is zero load the shortcomings that leakage current increase so that capacitor technical parameter index after long term high temperature keeps stable；Preparation method technique is simple, and cost is low, has a good application prospect.
Description
Technical field
The invention belongs to electrolyte field, more particularly to a kind of medium-high voltage aluminum electrolytic capacitor Working electrolyte and its system
Preparation Method
Background technology
At present, general aluminium electrolutic capacitor mesohigh Working electrolyte is using ethylene glycol as main solvent, with ammonium adipate, benzene
Ammonium formate, ammonium sebacate, ammonium pentaborate, boric acid, dodecandioic acid ammonium, 1,6- dodecandioic acids ammonium are that major solute etc. is formed, then are added
Enter additive and meet that high-temperature load and high temperature uncharge stability.Conventional high-temperature stable additive is mainly phosphorous chemical combination
Thing.Such as ammonium dihydrogen phosphate, diammonium hydrogen phosphate, phosphoric acid, phosphorous acid, ortho phosphorous acid, phosphoric acid mono-n-butylester, p isopropylbenzoic acid ester, pungent phenylate
The organic matters such as phosphate, polyphosphoric acid or inorganic matter etc. form.These phosphoric acid or phosphate can prevent from being electrolysed to a certain extent
Hydration corrosion function of the moisture content to alumite in liquid, but phosphoric acid, phosphorous acid, ortho phosphorous acid are easily accessible in oxide-film, are led
Oxide-film dielectric constant is caused to reduce, so that capacitance fall-off is big.Meanwhile strong acid class in phosphoric acid, phosphorous acid, ortho phosphorous acid category,
Dissolution can be produced to anode aluminium foil and anode oxide film, and electrolytic capacitor long-term work rear defence sealing is to alumite
Hydration erosion effect further decline, if addition is very low, the protective effect effect to oxide-film can substantially reduce,
Under high-temperature load, capacitance decline it is big, after the zero load work of high temperature, the shortcomings of leakage current increases.
The content of the invention
The technical problems to be solved by the invention be to provide a kind of medium-high voltage aluminum electrolytic capacitor Working electrolyte and its
Preparation method, the electrolyte overcome electrolytic capacitor capacitance under high-temperature load and decline big, leakage current after high temperature is zero load
The shortcomings that increase so that capacitor technical parameter index after long term high temperature keeps stable；Preparation method technique is simple, cost
It is low, have a good application prospect.
A kind of medium-high voltage aluminum electrolytic capacitor Working electrolyte of the present invention, the electrolyte composition include：By weight
Percentage, solvent 70%~90%, solute 9%~29%, hydrate inhibitor 0.1~1% and hydrogen absorber 0.1~1%；Its
In, the hydrate inhibitor is that one kind in phosphoric acid, ammonium dihydrogen phosphate, phosphorous acid, ortho phosphorous acid is different with phosphoric acid mono-n-butylester, phosphoric acid
One kind in propyl ester, pungent phenylate phosphate, polyphosphoric acid is combined, mass ratio 1:1~1:3.
The solute is ammonium adipate, ammonium benzoate, ammonium sebacate, ammonium pentaborate, boric acid, dodecandioic acid ammonium, 1,6- ten
One or more in two bisgallic acid ammoniums.
The solvent is ethylene glycol.
The hydrogen absorber is paranitrobenzoic acid, in p nitrobenzyl alcohol, o-Nitroanisole, p-nitrophenol
It is one or more of.
A kind of preparation method of medium-high voltage aluminum electrolytic capacitor Working electrolyte of the present invention, including：
(1) by weight percentage, 70%~90% solvent is heated to 60~90 DEG C, add 9%~29% it is molten
Matter, it is heated with stirring to 85~95 DEG C and is completely dissolved；
(2) solution of step (1) is added to 0.1~1% hydrate inhibitor, is heated to 95~145 DEG C；It is subsequently cooled to
85~95 DEG C, 0.1~1% hydrogen absorber is added, obtains electrolyte.
Beneficial effect
The organic matter such as phosphoric acid mono-n-butylester, p isopropylbenzoic acid ester, pungent phenylate phosphate, polyphosphoric acid belongs to medium in electrolyte of the present invention
Strong organic acid, it is acid weaker than phosphoric acid, phosphorous acid, ortho phosphorous acid, and strong inhale can occur with alumite in acid condition
Attached effect, so as to inhibit aluminum ions dissolving dissolution, the moieties of these organophosphorus esters, can effectively defence moisture to oxygen
Change the close of film, so as to prevent the lasting generation of hydration reaction, condenser leakage current is increased small；Simultaneously because of phosphoric acid only son
Ester, p isopropylbenzoic acid ester, pungent phenylate phosphate, polyphosphoric acid molecular structure are big, it is not easy into oxide-film, can reduce capacitor electricity
The decay of capacity so that capacitor technical parameter index after long term high temperature keeps stable；Preparation method technique is simple, cost
It is low, have a good application prospect.
Embodiment
With reference to specific embodiment, the present invention is expanded on further.It should be understood that these embodiments are merely to illustrate the present invention
Rather than limitation the scope of the present invention.In addition, it is to be understood that after the content of the invention lectured has been read, people in the art
Member can make various changes or modifications to the present invention, and these equivalent form of values equally fall within the application appended claims and limited
Scope.
Embodiment 1
The preparation of electrolyte：
(1) formula of table 1 is pressed, ethylene glycol is heated to 60 DEG C；Then ammonium adipate, ammonium pentaborate, dodecandioic acid are added
Ammonium stirs, and is heated to 85 DEG C；
(2) above-mentioned mixed liquor is added into ammonium dihydrogen phosphate and phosphoric acid mono-n-butylester, is uniformly mixed, continues to be heated to 135
℃；By forcing to cool down or naturally cool to 85 DEG C, paranitrobenzoic acid is added, so as to which middle jewelling electrolytic capacitor be made
Use Working electrolyte.
Embodiment 2
(1) formula of table 2 is pressed, ethylene glycol is heated to 70 DEG C；Then ammonium sebacate is added, ammonium pentaborate, 1,6- ten two
Bisgallic acid ammonium stirs, and is heated to 90 DEG C；
(2) above-mentioned mixed liquor is added into phosphoric acid and polyphosphoric acid, be uniformly mixed, continue to be heated to 95~105 DEG C, then add
Enter p nitrobenzyl alcohol, so as to which high-pressure aluminum electrolytic capacitor Working electrolyte be made.
Embodiment 3
(1) formula of table 3 is pressed, ethylene glycol is heated to 90 DEG C；Then addition dodecandioic acid ammonium, ammonium pentaborate, 1,6- ten
Two bisgallic acid ammoniums stir, and are heated to 95 DEG C；
(2) above-mentioned mixed liquor is added into ortho phosphorous acid and pungent phenylate phosphate, is uniformly mixed, continues to be heated to 105
DEG C, o-Nitroanisole is added, so as to which high-pressure aluminum electrolytic capacitor Working electrolyte be made.
The electrolytic capacitor of three kinds of operating voltages is made in the electrolyte obtained using embodiment 1~3：It is respectively
250V47uF,400V68uF,450V100uF,
These three capacitors are stored into 500h, 1000h, the average test data result of 10 products under 105 DEG C of environment
It see the table below 4：
Table 4
In table：C- capacitances；DF- loss angle tangents；IL-1 minute leakage currents
As a result：The medium-high voltage aluminum electrolytic capacitor of the Working electrolyte of embodiment 1~3 is used by the results showed that of table 4
Through 105 DEG C, test data particularly leakage current, Capacitance Shift Rate are all smaller after 500h, 1000h, and outward appearance is normal, thus reaches
The target of design.
Claims (4)
- A kind of 1. medium-high voltage aluminum electrolytic capacitor Working electrolyte, it is characterised in that：The electrolyte composition includes：By weight Percentage, solvent 70%~90%, solute 9%~29%, hydrate inhibitor 0.1~1% and hydrogen absorber 0.1~1%；Its In, the hydrate inhibitor is mass ratio 1:1 ammonium dihydrogen phosphate and phosphoric acid mono-n-butylester, mass ratio 2:5 phosphoric acid and polyphosphoric acid Or mass ratio 2:3 ortho phosphorous acid and pungent phenylate phosphate.
- A kind of 2. medium-high voltage aluminum electrolytic capacitor Working electrolyte according to claim 1, it is characterised in that：It is described molten Matter is one in ammonium adipate, ammonium benzoate, ammonium sebacate, ammonium pentaborate, boric acid, dodecandioic acid ammonium, 1,6- dodecandioic acid ammoniums Kind is several.
- A kind of 3. medium-high voltage aluminum electrolytic capacitor Working electrolyte according to claim 1, it is characterised in that：It is described molten Agent is ethylene glycol.
- A kind of 4. medium-high voltage aluminum electrolytic capacitor Working electrolyte according to claim 1, it is characterised in that：The hydrogen Aspiration agent is paranitrobenzoic acid, the one or more in p nitrobenzyl alcohol, o-Nitroanisole, p-nitrophenol.
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| CN201510557626.7A CN105140033B (en) | 2015-09-02 | 2015-09-02 | A kind of medium-high voltage aluminum electrolytic capacitor Working electrolyte and preparation method thereof |
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| CN201510557626.7A CN105140033B (en) | 2015-09-02 | 2015-09-02 | A kind of medium-high voltage aluminum electrolytic capacitor Working electrolyte and preparation method thereof |
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| CN105140033B true CN105140033B (en) | 2018-03-30 |
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| CN109243827B (en) * | 2018-11-07 | 2020-10-20 | 广州金立电子有限公司 | Capacitor and manufacturing method thereof |
| CN110648850A (en) * | 2019-09-19 | 2020-01-03 | 肇庆绿宝石电子科技股份有限公司 | Aluminum electrolytic capacitor special for high-power supply |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101599367A (en) * | 2009-07-10 | 2009-12-09 | 南通江海电容器股份有限公司 | 600V ultrahigh voltage aluminum electrolytic capacitor working electrolyte and preparation and application thereof |
| CN103779096A (en) * | 2014-01-25 | 2014-05-07 | 南通瑞达电子材料有限公司 | Working electrolyte for high voltages in electrolytic capacitor |
| CN103915258A (en) * | 2014-01-13 | 2014-07-09 | 深圳市智胜新电子技术有限公司 | 650V-700V extra-high-voltage aluminum electrolytic capacitor, working electrolyte and preparation method thereof |
| CN103943363A (en) * | 2014-05-06 | 2014-07-23 | 广东风华高新科技股份有限公司 | Electrolyte of aluminum electrolytic capacitor, preparation method thereof and aluminum electrolytic capacitor |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101599367A (en) * | 2009-07-10 | 2009-12-09 | 南通江海电容器股份有限公司 | 600V ultrahigh voltage aluminum electrolytic capacitor working electrolyte and preparation and application thereof |
| CN103915258A (en) * | 2014-01-13 | 2014-07-09 | 深圳市智胜新电子技术有限公司 | 650V-700V extra-high-voltage aluminum electrolytic capacitor, working electrolyte and preparation method thereof |
| CN103779096A (en) * | 2014-01-25 | 2014-05-07 | 南通瑞达电子材料有限公司 | Working electrolyte for high voltages in electrolytic capacitor |
| CN103943363A (en) * | 2014-05-06 | 2014-07-23 | 广东风华高新科技股份有限公司 | Electrolyte of aluminum electrolytic capacitor, preparation method thereof and aluminum electrolytic capacitor |
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Application publication date: 20151209 Assignee: NANTONG JIANGHAI ENERGY STORAGE TECHNOLOGY Co.,Ltd. Assignor: NANTONG JIANGHAI CAPACITOR Co.,Ltd. Contract record no.: X2020320010022 Denomination of invention: A working electrolyte for medium and high voltage aluminum electrolytic capacitor and its preparation method Granted publication date: 20180330 License type: Common License Record date: 20201026 |