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A kind of electrolytic solution of aluminum electrolytic capacitor and preparation method thereof

An aluminum electrolytic capacitor and electrolyte technology, applied in the field of aluminum electrolysis, can solve problems such as difficult to meet the use requirements, poor high-voltage resistance performance, and large capacitor loss, so as to suppress the increase of saturated vapor pressure, improve performance, and increase flashover voltage Effect

Inactive Publication Date: 2020-08-28
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the electrolyte of the existing aluminum electrolytic capacitors has poor high-voltage resistance performance, and the low conductivity leads to large capacitor loss, which is gradually difficult to meet the use requirements.

Method used

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  • A kind of electrolytic solution of aluminum electrolytic capacitor and preparation method thereof

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Effect test

Embodiment 1

[0021] In the embodiment of the present invention, an electrolyte solution for aluminum electrolytic capacitors includes the following raw materials in parts by weight: 60 parts of ethylene glycol, 10 parts of diethylene glycol, 5 parts of solute, 1 part of flash fire enhancer, 1 part of stabilizer, 0.5 part of mannitol, 0.5 part of hydrogen remover, and 1 part of quercetin.

[0022] Wherein, the solute is boric acid, borate, sebacic acid, and branched-chain carboxylic acid dicarboxylic acid mixed according to a mass ratio of 2:1:1:1.

[0023] The flash fire enhancer is a mixture of tartaric acid, citric acid and polyvinyl alcohol in a mass ratio of 1:1:1.

[0024] The stabilizer is mixed with dextol, sorbitol and xylitol in a mass ratio of 1:2:1.

[0025] Described hydrogen remover is nitrobenzoic acid.

[0026] In this embodiment, the preparation method of the aluminum electrolytic capacitor electrolyte has the following steps:

[0027] 1) take each raw material by propor...

Embodiment 2

[0032] In the embodiment of the present invention, an electrolyte solution for aluminum electrolytic capacitors includes the following raw materials in parts by weight: 65 parts of ethylene glycol, 12 parts of diethylene glycol, 8 parts of solute, 2 parts of flash enhancer, 1.5 parts of stabilizer, 1 part of mannitol, 0.8 parts of hydrogen remover, and 1.5 parts of quercetin.

[0033] Wherein, the solute is mixed with ammonium hydrogen azelate, benzoic acid, and benzoate in a mass ratio of 1:1:2.

[0034] The flash fire enhancer is a mixture of polyethylene glycol, ammonium polyacrylate and polyglycerol in a mass ratio of 1:1:1.

[0035] The stabilizer is mixed with sucrose and vitamin C in a mass ratio of 1:1.

[0036] The hydrogen remover is p-nitroacetophenone.

[0037] In this embodiment, the preparation method of the aluminum electrolytic capacitor electrolyte has the following steps:

[0038] 1) take each raw material by proportioning;

[0039] 2) Add ethylene glycol...

Embodiment 3

[0043] In the embodiment of the present invention, an electrolyte solution for aluminum electrolytic capacitors includes the following raw materials in parts by weight: 70 parts of ethylene glycol, 13 parts of diethylene glycol, 10 parts of solute, 3 parts of flash enhancer, 2 parts of stabilizer, 1.5 parts of mannitol, 1 part of hydrogen remover, 2 parts of quercetin.

[0044] Wherein, the solute is a mixture of boric acid, borate, and benzoate in a mass ratio of 1:1:1.

[0045] The flash fire enhancer is a mixture of tartaric acid, citric acid and polyglycerol in a mass ratio of 1:2:1.

[0046] The stabilizer is mixed with dextol, sorbitol, xylitol and vitamin C in a mass ratio of 1:2:1:1.

[0047] The hydrogen remover is p-nitroacetophenone.

[0048] In this embodiment, the preparation method of the aluminum electrolytic capacitor electrolyte has the following steps:

[0049] 1) take each raw material by proportioning;

[0050] 2) Add ethylene glycol, diethylene glycol,...

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Abstract

The invention discloses an aluminum electrolytic capacitor electrolyte, and relates to the technical field of aluminum electrolysis, in order to solve the problem that an existing electrolyte of an aluminum electrolytic capacitor suffers from relatively high capacitor lass caused by poor high-pressure resistance and low conductivity. The aluminum electrolytic capacitor electrolyte comprises the following raw materials of ethylene glycol, diethylene glycol, a solute, a flash fire lifting agent, stabilizers, mannitol, a hydrogen removal agent and quercetin. The invention further discloses a preparation method of the aluminum electrolytic capacitor electrolyte; a small amount of flash fire lifting agent is added into the prepared electrolyte, so that the flash fire voltage of the electrolytecan be improved; the stabilizers which are high-molecular organic matters of very high reducibility and hydrophilicity are added, so that direct contact between water and other harmful substances anda dielectric film can be prevented, improvement of saturation vapor pressure is inhibited, and hydration and erosion are prevented; and mannitol and quercetin are added, so that the synergistic effectis achieved, the flash fire voltage and the conductivity of the electrolyte can be further improved, the performance of the electrolyte is improved, and the electrolyte has a wide market prospect.

Description

technical field [0001] The invention relates to the technical field of aluminum electrolysis, in particular to an electrolytic solution for an aluminum electrolytic capacitor and a preparation method thereof. Background technique [0002] Aluminum electrolytic capacitors refer to capacitors whose anode is aluminum and cathode is electrolyte. This kind of capacitor has good capacitance, high temperature and pressure resistance, and has a certain self-healing ability. In aluminum electrolytic capacitors, the important role of the working electrolyte is to repair the defects on the anodic oxide film and maintain the performance of the capacitor. Therefore, improving the quality of the electrolyte is one of the keys to improving the performance of the capacitor. When an aluminum electrolytic capacitor is in use, if a flash fire occurs, the electrodes will be broken down and the capacitor will fail. Therefore, it is of great significance to increase the flash fire voltage of the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G9/035H01G9/145
CPCH01G9/035H01G9/145
Inventor 贾明刘宇李立祥艾亮殷宝华
Owner CENT SOUTH UNIV
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