CN104112597A - Middle-high voltage aluminum electrolytic capacitor electrolyte - Google Patents
Middle-high voltage aluminum electrolytic capacitor electrolyte Download PDFInfo
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- CN104112597A CN104112597A CN201410363229.1A CN201410363229A CN104112597A CN 104112597 A CN104112597 A CN 104112597A CN 201410363229 A CN201410363229 A CN 201410363229A CN 104112597 A CN104112597 A CN 104112597A
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Abstract
The invention relates to the technical field of capacitor electrolyte, and discloses a middle-high voltage aluminum electrolytic capacitor electrolyte. The middle-high voltage aluminum electrolytic capacitor electrolyte comprises the raw materials in percentages by weight as follows: 10-20% by weight of main electrolyte, 5-10% by weight of auxiliary electrolyte, 3-6% by weight of multi-polar-radical high polymer, 26-38% by weight of sorbitol, 27-38% by weight of diethylene glycol, 3-6% by weight of a hydrogen elimination agent, and 3-5% by weight of an additive agent, wherein the main electrolyte is ammonium dodecanedioate; the auxiliary electrolyte is sulphamic acid. According to the invention, the ammonium dodecanedioate serves as the main electrolyte, the sulphamic acid serves as the auxiliary electrolyte, and the multi-polar-radical high polymer is added at the same time, so that the middle-high voltage aluminum electrolytic capacitor electrolyte can work stably at 105 DEG C and 500-800 V for 1000 hours without any current leakage phenomenon, meets with the basic demands of a flash fire voltage and achieves a small specific resistance. The middle-high voltage aluminum electrolytic capacitor electrolyte disclosed by the invention is strong in oxidization forming capability, high-voltage resistant, good in high-temperature resistance, low in loss and long in service life.
Description
Technical field
The present invention relates to capacitor electrolyte technical field, refer more particularly to a kind of medium-high voltage aluminum electrolytic capacitor electrolyte.
Background technology
Working electrolyte is the actual negative electrode of electrolytic capacitor, the important function of rise oxonium ion is provided, repairing anode oxide film.Therefore, developing high performance Working electrolyte is vital for the performance that guarantees capacitor.
Traditional Working electrolyte boric acid+glycol system: this system is the electrolyte of aluminium electrolytic capacitor early application.Make its advantage of electrolyte of preparing in this way be technical maturation, process for preparation is simple to operate, preparation cost is low and market purchasing is easy, can meet the electric property of capacitor general work state.But, such electrolyte from boric acid produce between the crystallization water and ethylene glycol and boric acid because esterification generates a large amount of condensation water, causes the moisture of electrolyte system inside to raise, its result is while being used this electrolyte under surpassing the serviceability temperature condition of 100 ℃, water in electrolyte will become steam and evaporate, in the assembly of electrochemical capacitor, voltage rise is high thereupon, the so-called destruction problem of unavoidable generation, this system cannot be applied in hot environment, useful life is short, is now substantially eliminated.
Chinese patent CN201410176176.2 discloses a kind of aluminum electrolytic capacitor electrolyte, raw material by following percentage by weight is formulated: main electrolyte 10%-15%, assisted electrolysis matter 7%-10%, ethylene glycol 62%-75%, flash over voltage elevator 5%-8%, waterproof mixture 0.5%-3%, hydrogen agent 0.5%-3% disappears.Described main electrolyte is trimethyladipic acid, and described assisted electrolysis matter is boric acid.This invention utilizes trimethyladipic acid for main electrolyte, and this electrolyte solubility in ethylene glycol is large, even volatilize under the ethylene glycol solvent high temperature in electrolyte, described electrolyte still can keep its conductivity, can obviously promote the serviceability of aluminium electrolytic capacitor.But this invention is short useful life, during the water high temperature of generation, the hydration of antianode oxide-film, causes the loss of condenser capacity and dielectric oxide film electrical property to degenerate, and causes this electrolyte to be unsuitable for manufacturing 105 ℃ of serial high-voltage electrolysis capacitors.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of long service life, at high temperature the medium-high voltage aluminum electrolytic capacitor electrolyte of working stability.
For solving the problems of the technologies described above, the present invention by the following technical solutions:
A kind of medium-high voltage aluminum electrolytic capacitor electrolyte, it is characterized in that, the raw material that comprises following percentage by weight: main electrolyte 10-20%, assisted dielectric 5-10%, multipolarity based high-polymer 3-6%, D-sorbite 26-38%, diethylene glycol (DEG) 27-38%, the hydrogen agent 3-6% that disappears, additive 3-5%; Described main electrolyte is dodecandioic acid ammonium; Described assisted dielectric is sulfamic acid.
Preferably, described medium-high voltage aluminum electrolytic capacitor electrolyte comprises the raw material of following percentage by weight: main electrolyte 14-18%, assisted dielectric 6-9%, multipolarity based high-polymer 4-5%, D-sorbite 30-34%, diethylene glycol (DEG) 30-35%, the hydrogen agent 4-5% that disappears, additive 3-4%.
Preferably, described medium-high voltage aluminum electrolytic capacitor electrolyte comprises the raw material of following percentage by weight: main electrolyte 15%, assisted dielectric 8%, multipolarity based high-polymer 5%, D-sorbite 32%, diethylene glycol (DEG) 33%, the hydrogen agent 4% that disappears, additive 3%%.
Preferably, described multipolarity based high-polymer is the copolymer of polyvinyl alcohol and expoxy propane, gathers the wherein a kind of of titanate esters.
Preferably, described additive is citrate or hypophosphite.
Beneficial effect of the present invention: the present invention uses dodecandioic acid ammonium as main electrolyte, assisted dielectric is sulfamic acid, add multipolarity based high-polymer simultaneously, can be at 105 ℃, steady operation under 500-800V, works 1000 hours, does not occur leakage phenomenon, meet the basic demand of flash over voltage, resistivity is little; The oxidation of Working electrolyte of the present invention forms that ability is strong, high pressure resistant, resistance to elevated temperatures is good, low-loss, long service life.
Embodiment
Below in conjunction with embodiment, technical scheme of the present invention is further described in detail.
Embodiment mono-:
A medium-high voltage aluminum electrolytic capacitor electrolyte, comprises the raw material of following percentage by weight: main electrolyte 10%, assisted dielectric 5%, the copolymer 3% of polyvinyl alcohol and expoxy propane, D-sorbite 38%, diethylene glycol (DEG) 38%, the hydrogen agent 3% that disappears, citrate 3%; Described main electrolyte is dodecandioic acid ammonium; Described assisted dielectric is sulfamic acid.The present invention can be at 105 ℃, and steady operation under 500-800V is worked 1000 hours, does not occur leakage phenomenon, meets the basic demand of flash over voltage, and resistivity is little; The oxidation of Working electrolyte of the present invention forms that ability is strong, high pressure resistant, resistance to elevated temperatures is good, low-loss, long service life.
Embodiment bis-:
A medium-high voltage aluminum electrolytic capacitor electrolyte, comprises the raw material of following percentage by weight: main electrolyte 20%, assisted dielectric 10%, poly-titanate esters 6%, D-sorbite 26%, diethylene glycol (DEG) 27%, the hydrogen agent 6% that disappears, hypophosphite 5%; Described main electrolyte is dodecandioic acid ammonium; Described assisted dielectric is sulfamic acid.The present invention can be at 105 ℃, and steady operation under 500-800V is worked 1000 hours, does not occur leakage phenomenon, meets the basic demand of flash over voltage, and resistivity is little; The oxidation of Working electrolyte of the present invention forms that ability is strong, high pressure resistant, resistance to elevated temperatures is good, low-loss, long service life.
Embodiment tri-:
A medium-high voltage aluminum electrolytic capacitor electrolyte, comprises the raw material of following percentage by weight: main electrolyte 18%, assisted dielectric 9%, the copolymer 5% of polyvinyl alcohol and expoxy propane, D-sorbite 30%, diethylene glycol (DEG) 30%, the hydrogen agent 4% that disappears, citrate 3%; Described main electrolyte is dodecandioic acid ammonium; Described assisted dielectric is sulfamic acid.The present invention can be at 105 ℃, and steady operation under 500-800V is worked 1000 hours, does not occur leakage phenomenon, meets the basic demand of flash over voltage, and resistivity is little; The oxidation of Working electrolyte of the present invention forms that ability is strong, high pressure resistant, resistance to elevated temperatures is good, low-loss, long service life.
Embodiment tetra-:
A medium-high voltage aluminum electrolytic capacitor electrolyte, comprises the raw material of following percentage by weight: main electrolyte 14%, assisted dielectric 6%, the copolymer 4% of polyvinyl alcohol and expoxy propane, D-sorbite 34%, diethylene glycol (DEG) 35%, the hydrogen agent 4% that disappears, hypophosphite 3%; Described main electrolyte is dodecandioic acid ammonium; Described assisted dielectric is sulfamic acid.The present invention can be at 105 ℃, and steady operation under 500-800V is worked 1000 hours, does not occur leakage phenomenon, meets the basic demand of flash over voltage, and resistivity is little; The oxidation of Working electrolyte of the present invention forms that ability is strong, high pressure resistant, resistance to elevated temperatures is good, low-loss, long service life.
Embodiment five:
A medium-high voltage aluminum electrolytic capacitor electrolyte, comprises the raw material of following percentage by weight: main electrolyte 15%, assisted dielectric 8%, poly-titanate esters 5%, D-sorbite 32%, diethylene glycol (DEG) 33%, the hydrogen agent 4% that disappears, citrate 3%; Described main electrolyte is dodecandioic acid ammonium; Described assisted dielectric is sulfamic acid.The present invention can be at 105 ℃, and steady operation under 500-800V is worked 1000 hours, does not occur leakage phenomenon, meets the basic demand of flash over voltage, and resistivity is little; The oxidation of Working electrolyte of the present invention forms that ability is strong, high pressure resistant, resistance to elevated temperatures is good, low-loss, long service life.
It should be noted last that, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although the present invention is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can modify or be equal to replacement technical scheme of the present invention, and not departing from the spirit and scope of technical solution of the present invention, it all should be encompassed in the middle of claim scope of the present invention.
Claims (5)
1. a medium-high voltage aluminum electrolytic capacitor electrolyte, it is characterized in that, the raw material that comprises following percentage by weight: main electrolyte 10-20%, assisted dielectric 5-10%, multipolarity based high-polymer 3-6%, D-sorbite 26-38%, diethylene glycol (DEG) 27-38%, the hydrogen agent 3-6% that disappears, additive 3-5%; Described main electrolyte is dodecandioic acid ammonium; Described assisted dielectric is sulfamic acid.
2. medium-high voltage aluminum electrolytic capacitor electrolyte according to claim 1, it is characterized in that, the raw material that comprises following percentage by weight: main electrolyte 14-18%, assisted dielectric 6-9%, multipolarity based high-polymer 4-5%, D-sorbite 30-34%, diethylene glycol (DEG) 30-35%, the hydrogen agent 4-5% that disappears, additive 3-4%.
3. medium-high voltage aluminum electrolytic capacitor electrolyte according to claim 1, is characterized in that, comprises the raw material of following percentage by weight: main electrolyte 15%, assisted dielectric 8%, multipolarity based high-polymer 5%, D-sorbite 32%, diethylene glycol (DEG) 33%, the hydrogen agent 4% that disappears, additive 3%.
4. medium-high voltage aluminum electrolytic capacitor electrolyte according to claim 1, is characterized in that, described multipolarity based high-polymer is the copolymer of polyvinyl alcohol and expoxy propane, gathers the wherein a kind of of titanate esters.
5. medium-high voltage aluminum electrolytic capacitor electrolyte according to claim 1, is characterized in that, described additive is citrate or hypophosphite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410363229.1A CN104112597A (en) | 2014-07-25 | 2014-07-25 | Middle-high voltage aluminum electrolytic capacitor electrolyte |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410363229.1A CN104112597A (en) | 2014-07-25 | 2014-07-25 | Middle-high voltage aluminum electrolytic capacitor electrolyte |
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| Publication Number | Publication Date |
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| CN104112597A true CN104112597A (en) | 2014-10-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410363229.1A Withdrawn CN104112597A (en) | 2014-07-25 | 2014-07-25 | Middle-high voltage aluminum electrolytic capacitor electrolyte |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113257575A (en) * | 2021-05-25 | 2021-08-13 | 深圳市凯琦佳科技股份有限公司 | Ultralow-loss electrolyte suitable for 125 degrees and preparation method thereof |
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2014
- 2014-07-25 CN CN201410363229.1A patent/CN104112597A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113257575A (en) * | 2021-05-25 | 2021-08-13 | 深圳市凯琦佳科技股份有限公司 | Ultralow-loss electrolyte suitable for 125 degrees and preparation method thereof |
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| C04 | Withdrawal of patent application after publication (patent law 2001) | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20141022 |