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Electrolytic solution of aluminum electrolytic capacitor, and preparation method of electrolytic solution

An aluminum electrolytic capacitor and electrolyte technology, applied in electrolytic capacitors, capacitors, circuits, etc., can solve the problems of aluminum electrode foil corrosion, low effective impedance, resistance to wave current, and reduced solubility, and achieve good stability and increase. Significant effect and long service life

Active Publication Date: 2019-03-08
广州金立电子有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the boric acid + ethylene glycol system will produce water, which will cause the aluminum electrode foil to corrode and generate hydrogen gas, and it will cause the point to be easily broken when it is greater than 100 ° C; in the linear ammonium carboxylate salt + boric acid + ethylene glycol system, the salt Solubility decreases with increasing molecular weight, resulting in increased impedance
The branched chain polycarboxylate + ethylene glycol system can produce aluminum electrolytic capacitors with low effective impedance and high resistance to wave current, but the current domestic technology for manufacturing branched polycarboxylates is not yet mature.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1 An electrolyte solution of an aluminum electrolytic capacitor

[0021] Raw material formula: 48 parts of ethylene glycol, 1 part of 4-chloro-3-nitrobenzoic acid, 12.5 parts of polyethylene glycol, 1.5 parts of ammonium hypophosphite, 1 part of 1H-1,2,3-triazole, 7.8 parts of citric acid, 0.7 parts of p-toluenesulfonyl isocyanate, 1.2 parts of ammonium hydrogen azelate, 3.3 parts of ammonium sebacate, and 0.5 parts of polyalphaolefin.

[0022] The preparation method of the electrolyte of described aluminum electrolytic capacitor is:

[0023] S1. Heat ethylene glycol to 75°C, then add ammonium hydrogen azelaate, ammonium sebacate, ammonium hypophosphite, 1H-1,2,3-triazole, keep warm and stir until completely dissolved to obtain a mixture 1;

[0024] S2. Heat the mixture 1 to 105°C, add citric acid, heat it up to 140°C for the second time, and keep it warm for 60 minutes to obtain the mixture 2;

[0025] S3. Continue heating the mixture 2 to 148° C., add 4-...

Embodiment 2

[0026] Embodiment 2 A kind of electrolytic solution of aluminum electrolytic capacitor

[0027] 45 parts of ethylene glycol, 0.5 parts of 4-chloro-3-nitrobenzoic acid, 10 parts of polyethylene glycol, 0.5 parts of ammonium hypophosphite, 0.5 parts of 1H-1,2,3-triazole, 6 parts of citric acid 0.1 part of p-toluenesulfonyl isocyanate, 0.5 part of ammonium hydrogen azelate, 3 parts of ammonium sebacate, and 0.1 part of polyalphaolefin.

[0028] The preparation method of the electrolyte of the aluminum electrolytic capacitor is the same as that of Example 1.

Embodiment 3

[0029] Example 3 An electrolyte solution for an aluminum electrolytic capacitor

[0030] 50 parts of ethylene glycol, 1.5 parts of 4-chloro-3-nitrobenzoic acid, 15 parts of polyethylene glycol, 2.5 parts of ammonium hypophosphite, 1.5 parts of 1H-1,2,3-triazole, 9 parts of citric acid 1 part of p-toluenesulfonyl isocyanate, 1.5 parts of ammonium hydrogen azelate, 3.5 parts of ammonium sebacate, and 0.8 parts of polyalphaolefin.

[0031] The preparation method of the electrolyte of the aluminum electrolytic capacitor is the same as that of Example 1.

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PUM

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Abstract

The invention relates to the technical field of electrolytic solutions for electrolytic capacitors, in particular to an electrolytic solution of an aluminum electrolytic capacitor, and a preparation method of the electrolytic solution. The electrolytic solution of the aluminum electrolytic capacitor is prepared from the following raw materials in parts by weight: 45-50 parts of ethanediol, 0.5-1.5parts of 4-chloro-3-nitrobenzoic acid, 10-15 parts of polyethylene glycol, 0.5-2.5 parts of ammonium hypophosphite, 0.5-1.5 parts of 1H-1,2,3-triazole, 6-9 parts of citric acid, 0.1-1 part of p-toluenesulfonyl isocyanate, 0.5-1.5 parts of ammonium hydrogen azelate, 3-3.5 parts of ammonium sebacate and 0.1-0.8 parts of poly alpha olefin. The electrolytic solution of the aluminum electrolytic capacitor provided by the invention is resistant to high temperature, has high flash voltage and conductivity, is long in service life and can be widely applied to the fields of large-screen color TVs, automobile electronics, frequency conversion technologies, energy-saving lamps, communication electronics and the like.

Description

technical field [0001] The invention relates to the technical field of electrolytic solutions for electrolytic capacitors, in particular to an electrolytic solution for aluminum electrolytic capacitors and a preparation method. Background technique [0002] With the development of large-screen color TV, automotive electronics, frequency conversion technology, energy-saving lamps and communication electronics, the demand for aluminum electrolytic capacitors is increasing, and the performance requirements for aluminum electrolytic capacitors are becoming more and more stringent. [0003] Electrolyte is a term with a wide range of meanings. It is used in different industries to represent different contents. There are electrolytes in living organisms, electrolytes used in the battery industry, and electrolytes in electrolytic capacitors, supercapacitors and other industries. The composition of electrolytes used in different industries varies greatly, or even completely differen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/035
CPCH01G9/035
Inventor 江庆洋江宜哲
Owner 广州金立电子有限公司
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