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High-voltage high-conductivity electrolytic solution for aluminum electrolytic capacitor

An aluminum electrolytic capacitor, high conductance technology, applied in the direction of electrolytic capacitors, capacitors, circuits, etc., can solve the problems of flashover voltage and conductivity not high enough, and achieve the characteristics of not easy to produce gas, good voltage resistance, and small loss change Effect

Active Publication Date: 2019-06-18
SHENZHEN CAPCHEM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide an electrolytic solution for high-voltage high-conductivity aluminum electrolytic capacitors in view of the problem that the flashover voltage and conductivity in the prior art are not high enough

Method used

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  • High-voltage high-conductivity electrolytic solution for aluminum electrolytic capacitor
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  • High-voltage high-conductivity electrolytic solution for aluminum electrolytic capacitor

Examples

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Embodiment 1

[0026] This embodiment is used to illustrate the electrolytic solution for a high-voltage high-conductivity aluminum electrolytic capacitor disclosed in the present invention.

[0027] The electrolyte composition, conductivity and flashover voltage of the high-voltage high-conductivity aluminum electrolytic capacitor provided in this embodiment are shown in the following table.

[0028] Wherein, the preparation method of the electrolyte solution is as follows: heating ethylene glycol and diethylene glycol to 135° C. to 150° C., adding polyvinyl alcohol, stirring and dissolving until the solution is clear and transparent. Then lower the temperature to 125°C-130°C, add boric acid and mannitol, and keep it open for 30-45 minutes. After the heat preservation is completed, cool down to 110°C, add the main solute, ammonium sebacate, azelaic acid, p-nitrobenzyl alcohol and dispersion liquid containing nano-silicon, keep the temperature at 90°C-100°C, and keep warm for 30-45min . Af...

Embodiment 2

[0032] This embodiment is used to illustrate the electrolytic solution for a high-voltage high-conductivity aluminum electrolytic capacitor disclosed in the present invention.

[0033] The electrolyte composition, conductivity and flashover voltage of the high-voltage high-conductivity aluminum electrolytic capacitor provided in this embodiment are shown in the following table.

[0034] Wherein, the preparation method of the electrolyte solution is as follows: heating ethylene glycol and diethylene glycol to 135° C. to 150° C., adding polyvinyl alcohol, stirring and dissolving until the solution is clear and transparent. Then lower the temperature to 125°C-130°C, add boric acid and mannitol, and keep it open for 30-45 minutes. After the heat preservation is completed, cool down to 110°C, add the main solute, ammonium sebacate, azelaic acid, p-nitrobenzyl alcohol and dispersion liquid containing nano-silicon, keep the temperature at 90°C-100°C, and keep warm for 30-45min . Af...

Embodiment 3

[0038] This embodiment is used to illustrate the electrolytic solution for a high-voltage high-conductivity aluminum electrolytic capacitor disclosed in the present invention.

[0039] The electrolyte composition, conductivity and flashover voltage of the high-voltage high-conductivity aluminum electrolytic capacitor provided in this embodiment are shown in the following table.

[0040] Wherein, the preparation method of the electrolyte solution is as follows: heating ethylene glycol and diethylene glycol to 135° C. to 150° C., adding polyvinyl alcohol, stirring and dissolving until the solution is clear and transparent. Then lower the temperature to 125°C-130°C, add boric acid and mannitol, and keep it open for 30-45 minutes. After the heat preservation is completed, cool down to 110°C, add the main solute, ammonium sebacate, azelaic acid, p-nitrobenzyl alcohol and dispersion liquid containing nano-silicon, keep the temperature at 90°C-100°C, and keep warm for 30-45min . Afte...

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Abstract

In order to overcome the problem that sparking voltage and conductivity are not high enough in the prior art, the invention provides a high-voltage high-conductivity electrolytic solution for an aluminum electrolytic capacitor. The electrolytic solution comprises 40%-60% of a main solvent, 15%-30% of a main solute, 9%-15% of an auxiliary solvent, 4%-7% of an auxiliary solute, 5%-10% of a sparkingimprover and 0.2%-0.5% of a hydrogen elimination agent, wherein the main solute is long-chain dicarboxylic acid containing 22-24 carbon atoms with branched chains or ammonium dicarboxylate; the auxiliary solute is selected from azelaic acid or azelate, sebacic acid or sebacate, dodecanedioic acid or dodecanedioate, dicarboxylic acid containing 16-18 carbon atoms with branched chains or dicarboxylate and inorganic acid or inorganic acid salt; and the sparking improver is selected from a glycol dispersion liquid containing nano-silicon and also contains polyvinyl alcohol borate, polyvinyl alcohol with the polymerization degree of 300-3,000, polyglycerol with the polymerization degree of 300-3,500, polypropylene glycol with the polymerization degree of 500-2,500, a silane coupling agent, polypropylene oxide ether and polyfatty acid or ammonium salt thereof. The high-voltage high-conductivity electrolytic solution for the aluminum electrolytic capacitor is high in sparking voltage which can reach 580V or above, and the conductivity is improved by 20%-40% compared with an existing electrolytic solution.

Description

technical field [0001] The invention relates to an electrolytic solution for a high-voltage high-conductivity aluminum electrolytic capacitor, in particular to an electrolytic solution for a 500V high-voltage high-conductivity aluminum electrolytic capacitor. Background technique [0002] With the rapid development of the industrial field, the high efficiency and energy saving of industrial equipment has brought about the high voltage of the circuit system, so that the performance requirements of high voltage and long life of aluminum electrolytic capacitors for high voltage inverters and electronic vehicles are constantly increasing. At present, in order to meet the required high voltage, several capacitors with lower voltage are usually used in series in industrial circuits. However, when one of the capacitors in series fails, it often seriously affects the normal use of other capacitors. , shorten the overall service life. In order to save the space of the whole machine,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/035
Inventor 禤裕汉王明杰贾云
Owner SHENZHEN CAPCHEM TECH CO LTD
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