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Working electrolytic solution of aluminum electrolytic capacitor with resistance to high voltage and wide-range temperature and manufacturing method thereof

An aluminum electrolytic capacitor and electrolyte technology, which is applied in the field of electrolyte, can solve the problems that cannot well meet the requirements of the use temperature range and withstand voltage of aluminum electrolytic capacitors, the capacitor withstand voltage is unstable, and the capacitor bulges, etc., and achieves good application. Prospect, low cost, good effect of low temperature anti-freezing performance

Inactive Publication Date: 2015-12-09
NANTONG JIANGHAI CAPACITOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The former is likely to cause the capacitor to bulge and fail due to the high vapor pressure of the electrolyte due to the large amount of water generated during the preparation of the electrolyte; the latter is unstable due to the high conductivity of the capacitor.
The electrolytes of the two systems cannot well meet the requirements of the aluminum electrolytic capacitor for the operating temperature range and withstand voltage

Method used

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  • Working electrolytic solution of aluminum electrolytic capacitor with resistance to high voltage and wide-range temperature and manufacturing method thereof
  • Working electrolytic solution of aluminum electrolytic capacitor with resistance to high voltage and wide-range temperature and manufacturing method thereof
  • Working electrolytic solution of aluminum electrolytic capacitor with resistance to high voltage and wide-range temperature and manufacturing method thereof

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Experimental program
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Effect test

Embodiment 1

[0018]

[0019] Electrolyte preparation:

[0020] (1) According to the formula in Table 1, mix and heat ethylene glycol, glycerin, and diethylene glycol monomethyl ether to 60°C; then add ammonium pentaborate, ammonium sebacate, 2,7-dibutyloctane ammonium acid, stir well and heat to 85°C;

[0021] (2) Add phosphoric acid and p-nitrobenzyl alcohol to the above mixed solution, stir and mix evenly, and continue heating to 87° C.; through forced cooling or natural cooling, a working electrolyte for high-voltage and wide-temperature aluminum electrolytic capacitors is obtained.

Embodiment 2

[0023]

[0024] Electrolyte preparation:

[0025] (1) According to the formula in Table 2, mix and heat ethylene glycol, glycerin, and triethylene glycol monomethyl ether to 60°C; then add ammonium pentaborate, ammonium azelate, and ammonium 1,6-dodecanoate , stir well and heat to 88°C;

[0026] (2) Add the above mixed liquid to hypophosphorous acid and o-nitroanisole, stir and mix evenly, and continue heating to 90° C.; through forced cooling or natural cooling, a working electrolyte for high-voltage and wide-temperature aluminum electrolytic capacitors is obtained.

Embodiment 3

[0028]

[0029] Electrolyte preparation:

[0030] (1) According to the formula in Table 3, mix and heat ethylene glycol, glycerin, and triethylene glycol monomethyl ether to 80°C; then add ammonium pentaborate, ammonium sebacate, and ammonium 1,4-dodecanoate , fully stirred evenly, and heated to 90°C;

[0031] (2) Add the above mixed liquid to hypophosphorous acid and m-nitroacetophenone, stir and mix evenly, and continue heating to 95°C; through forced cooling or natural cooling, a working electrolyte for high-voltage and wide-temperature aluminum electrolytic capacitors is obtained.

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Abstract

The invention relates to a working electrolytic solution of an aluminum electrolytic capacitor with resistance to high voltage and wide-range temperature and a manufacturing method thereof, wherein the working electrolytic solution comprises, by weight percent,70 percent to 90 percent of solvent, 9 percent to 29 percent of solute, 0.1 to 1 percent of high temperature stabilizer and 0.1 to 1 percent of gas absorbent; the manufacturing method comprises: a. heating after blending the solvent by weight percent, adding solute, stirring and heating till the solute is completely dissolved; b. and adding the high temperature stabilizer and the gas absorbent into the solution that is already reacted and basically clarified in the step (a ), stirring and then naturally cooling till the electrolytic solution is acquired. According to the invention, the electrolytic solution provided herein has good low temperature freezing-resistant performance, thus the electrolytic solution has the ability to work at wide range temperature; at the same time, the electrolytic solution also has high sparking voltage and can be suitable for electrolytic capacitors with 400V to 500V high voltage; the technology of the manufacturing method is simple; and the cost is low, thus the electrolytic solution has good application prospect.

Description

technical field [0001] The invention belongs to the field of electrolytes, in particular to a working electrolyte for high-voltage and wide-temperature aluminum electrolytic capacitors and a preparation method thereof Background technique [0002] Electrolytic capacitors are one of the basic components of electronic products. In recent years, with the development of outdoor large-screen displays, electric vehicle charging piles, communication base stations, and outdoor lighting, the demand for high-voltage, wide-temperature aluminum electrolytic capacitors is increasing. [0003] The electrolyte is the cathode of the aluminum electrolytic capacitor. It can repair the defects and defects of the anodic oxide film, and at the same time, it plays a decisive role in the temperature range, service life, reliability and other electrical properties of the aluminum electrolytic capacitor. The working electrolyte used in traditional high-voltage aluminum electrolytic capacitors is gen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/035
Inventor 丰骏徐永华季张林
Owner NANTONG JIANGHAI CAPACITOR CO LTD
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