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650V high-voltage aluminium electrolytic capacitor working electrolyte and preparation method thereof

An aluminum electrolytic capacitor and electrolyte technology, applied in electrolytic capacitors, liquid electrolytic capacitors, capacitors, etc., can solve problems such as low solubility, large product loss, and unsuitable production, and achieve low viscosity, high conductivity, and high conductivity Effect

Inactive Publication Date: 2017-03-22
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, for the development of ultra-high voltage (greater than 650V) electrolytes, long-chain carboxylate ammonium salts or carboxylic acids are mainly preferred, but the long-carbon chain carboxylate ammonium salts or carboxylic acids currently used in research and development mainly come from abroad, and domestic The production technology is not mature, so the production cost of the electrolyte will be high, and it is not suitable for actual production
In addition, ammonium carboxylate salts or carboxylic acids with long carbon chains have low solubility due to their long carbon chains, which will lead to low conductivity of the electrolyte.
Patent CN103811183A provides a 630V aluminum electrolytic capacitor; patent CN103794369A provides a 700V aluminum electrolytic capacitor; patent CN104465100A provides a 800V aluminum electrolytic capacitor, but they all use long carbon chain carboxylate ammonium salt or carboxylic acid as the main solute , the conductivity of the electrolyte is relatively low, and the product loss is relatively large

Method used

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  • 650V high-voltage aluminium electrolytic capacitor working electrolyte and preparation method thereof

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preparation example Construction

[0022] A method for preparing a working electrolyte for a 650V high-voltage aluminum electrolytic capacitor, comprising the following steps: 1) uniformly mixing a main solvent and an auxiliary solvent;

[0023] 2) Add 30%-40% solute at a temperature of 40-70 degrees Celsius, stir and heat up to 120-13-degrees Celsius;

[0024] 3) Raise the temperature to 130-150 degrees Celsius and add the flash voltage booster, and continue to heat up until the flash voltage booster dissolves;

[0025] 4) After the flash voltage is completely dissolved, cool to 125-135 degrees Celsius, add the remaining solute, and keep warm for 60-90 minutes;

[0026] 5) Cool to 100-105 degrees Celsius and add other additives.

Embodiment 1

[0028] As shown in Table 1, the working electrolyte of the 650V high-voltage aluminum electrolytic capacitor of this embodiment includes 75% ethylene glycol, 5% nano-silica solution, 5% glycerin, 6.5% ammonium sebacate, 2% Mannitol, 0.5% ammonium 1,7-dodecanoate, 3% boric acid polyethylene glycol polyester, 2% polyvinyl alcohol, 0.5% ammonium hypophosphite and 0.5% p-nitrobenzyl alcohol , the above is the mass percentage. When preparing, mix and heat 75% ethylene glycol, 5% nano-silica solution, and 5% glycerin to 40-50°C by mass percentage, add 3% ammonium sebacate, 2% mannitol and 0.5% 1,7 - Ammonium dodecanoate. Continue heating to 130-135°C, add boric acid polyethylene glycol polyester 3%, polyvinyl alcohol 2%, add until dissolved, then cool down to 125-135°C, add 3.5% ammonium sebacate, and keep warm for 60min. Cool to 100-105°C, add 0.5% each of ammonium hypophosphite and p-nitrobenzyl alcohol, and the configuration is complete.

[0029] The parameters and performance...

Embodiment 2

[0031]As shown in Table 1, the working electrolyte of the 650V high-voltage aluminum electrolytic capacitor of this embodiment includes 55% ethylene glycol, 10% polyethylene glycol, 5% diethylene glycol monobutyl ether, and 6% nano Silica solution, 7% ammonium sebacate, 3% sebacic acid, 1% mannitol, 3% citric acid, 1% ammonium 1,7-dodecanoate, 2% boric acid, 3% polyvinyl alcohol, 2% sodium tetraborate, 1% ammonium hypophosphite and 1% p-nitrobenzyl alcohol; the above are mass percentages. When preparing, mix and heat 55% ethylene glycol, 10% polyethylene glycol 400, 5% diethylene glycol monobutyl ether, and 6% nano-silica solution to 40-50 °C, and add 3 % ammonium sebacate, 3% sebacic acid, 1% mannitol and 1% ammonium 1,7-dodecanedioate. Continue heating to 130-135°C, add 2% boric acid, 3% polyvinyl alcohol, 2% sodium tetraborate, add until dissolved, then cool down to 125-135°C, add 4% ammonium sebacate, 3% citric acid , and keep warm for 70min. Cool to 100-105°C, add 1% e...

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Abstract

A 650V high-voltage aluminium electrolytic capacitor working electrolyte includes, in percentage by mass, 50% to 80% of a main solvent, 20% to 40% of auxiliary solvents, 5% to 15% of solutes, 1% to 8% of a sparking voltage enhancing agent; and the auxiliary solvents are two or more of a gamma-butyrolactone, DMF, polyethylene glycol 200, polyethylene glycol 400, a nano silica solution, glycerol, propylene carbonate, ethylene carbonate, tributyl phosphate, diethylene glycol monobutyl ether, trienthylene glycol dimethacrylate and diethylene glycol. The 650V high-voltage aluminium electrolytic capacitor working electrolyte has the advantages of low viscosity and high conductivity.

Description

technical field [0001] The invention relates to an electrolytic solution for an aluminum electrolytic capacitor, in particular to a working electrolyte for a 650V high-voltage aluminum electrolytic capacitor and a preparation method thereof. Background technique [0002] Aluminum electrolytic capacitors are one of the basic components of electronic products. With the continuous improvement of the quality of electronic products, higher and higher requirements are put forward for the performance of aluminum electrolytic capacitors such as operating voltage, service life, and upper limit operating temperature. At present, many well-known brand capacitor manufacturers such as Japan, which are at the forefront of the world, have successively launched products with a rated working voltage higher than 650V, and most of the new product series they have launched are in the field of ultra-high voltage. It can be seen that ultra-high voltage aluminum electrolytic Capacitors are a trend...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/035H01G9/145
CPCH01G9/035H01G9/145
Inventor 贾明李焱根曹亮胡啸宇艾亮
Owner CENT SOUTH UNIV
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