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Working electrolyte of aluminum electrolytic capacitor with voltage lower than 63V

An aluminum electrolytic capacitor and electrolyte technology, applied in the field of capacitors, can solve the problems of increasing the flash voltage of the electrolyte, failing to meet the requirements of small size, and high initial electrical characteristics of the capacitor, so as to achieve favorable capacity performance, satisfactory conductivity, and characteristics Effect with little deterioration

Inactive Publication Date: 2020-09-04
HUNAN CITY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, increasing the flashover voltage of the electrolyte will correspondingly reduce the conductivity of the electrolyte, and the initial electrical characteristic DF of the capacitor will be high.
Improving the pressure resistance of aluminum foil will reduce the specific volume of aluminum foil accordingly, which cannot meet the small size requirements, and at the same time, increase the cost of raw materials
In the case of the product size limit, the capacitor capacity design is too low to meet customer requirements, and it is easy to cause short-circuit breakdown to varying degrees

Method used

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  • Working electrolyte of aluminum electrolytic capacitor with voltage lower than 63V

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preparation example Construction

[0034] A method for preparing a working electrolyte of an aluminum electrolytic capacitor with a voltage lower than 63V, wherein the preparation of the working electrolyte of an aluminum electrolytic capacitor lower than 63V comprises the following steps:

[0035] S1. After mixing the main solvent and the auxiliary solvent, heat it to 100-125°C, add the solute, and keep it warm for 5-20 minutes to obtain a mixed solution;

[0036] S2. Under the condition that the temperature is 100-110°C, add a flash voltage booster to the mixed solution until dissolved, heat to 125-135°C, and keep warm for 10-40 minutes;

[0037] S3, after adding all the components of the electrolyte, stir evenly, lower the temperature to 85-100° C., keep the temperature for 10-30 min, and cool to obtain the electrolyte.

Embodiment 1

[0039] A working electrolyte for an aluminum electrolytic capacitor with a voltage lower than 63V. The working electrolyte for an aluminum electrolytic capacitor with a voltage lower than 63V includes the following components in parts by mass: 70 parts of a main solvent, 15 parts of an auxiliary solvent, and 18 parts of a solute , 5 parts of flash voltage booster, 0.8 part of waterproof mixture, described waterproof mixture is 1 part of 8-hydroxyquinoline, 0.8 part of 3,5-dihydroxybenzoic acid, 3 parts of phosphoric acid, 2 parts of polyphosphoric acid, 1 part of ten A mixture of dialkyl phosphate and 0.5 part cetyl phosphate.

[0040] The main solvent is ethylene glycol. Described auxiliary solvent comprises deionized water and ethylene glycol methyl ether, ethylene glycol ether.

[0041] Described solute comprises dimer acid salt, sebacic acid, adipic acid, benzoic acid benzyl ester;

[0042] The flash voltage booster includes nano-silica dispersant, amorphous copper nanop...

Embodiment 2

[0049] A working electrolyte for an aluminum electrolytic capacitor with a voltage lower than 63V. The working electrolyte for an aluminum electrolytic capacitor with a voltage lower than 63V includes the following components in parts by mass: 60 parts of a main solvent, 10 parts of an auxiliary solvent, and 10 parts of a solute , 4 parts of flash voltage booster, 0.2 part of waterproof mixture, described waterproof mixture is 3 parts of 8-hydroxyquinoline, 1 part of 3,5-dihydroxybenzoic acid, 0.5 part of phosphoric acid, 0.8 part of polyphosphoric acid, 1 part of ten A mixture of dialkyl phosphate and 0.6 part cetyl phosphate.

[0050] The main solvent is ethylene glycol. Described auxiliary solvent comprises deionized water and ethylene glycol ethyl ether, ethylene glycol butyl ether.

[0051] Described solute comprises dimer salt, sebacic acid, adipic acid, azelaic acid, dodecanedioic acid, benzoic acid;

[0052] The flash voltage booster includes nano-silica dispersant, ...

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Abstract

The invention belongs to the field of capacitors, and particularly relates to a working electrolyte of an aluminum electrolytic capacitor of which the voltage is lower than 63V, and the electrolyte comprises the following components in parts by mass: 40-56 parts of a main solvent, 10-20 parts of an auxiliary solvent, 15-30 parts of a solute and 4-6 parts of a sparking voltage improver. The workingelectrolyte of the aluminum electrolytic capacitor is high in high-temperature stability, relatively high in sparking voltage, wide in working temperature range, high and stable in conductivity afterbeing heated, and good in application prospect and market prospect.

Description

technical field [0001] The invention belongs to the field of capacitors, in particular to a working electrolyte for an aluminum electrolytic capacitor with a voltage lower than 63V. Background technique [0002] The quality and performance of aluminum electrolytic capacitors largely depend on the performance of the working electrolyte, and the working electrolyte of low-voltage capacitors mostly contains more water. The low-voltage water-containing working electrolyte has several advantages: First, the working electrolyte contains more Water can provide a higher conductivity for the working electrolyte, thereby reducing the loss value of the entire product, reducing the heat generated when the product is working, and prolonging the service life of the product; second, water is an excellent solvent in the working electrolyte, which can improve the working efficiency. The solubility in the electrolyte; the third is that water is the source of oxygen anions needed to repair the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/035H01G9/045
CPCH01G9/035H01G9/045
Inventor 邓杨保李加升肖卫初邓曙光熊洁谭跃
Owner HUNAN CITY UNIV
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