Electrolysis solution and preparation method thereof as well as preparation method for obtained aluminum capacitor

An aluminum electrolytic capacitor and electrolyte technology, applied in liquid electrolytic capacitors, electrolytic capacitors, capacitors, etc., can solve problems such as flash fire, breakdown, product failure, safety accidents, etc., achieve high flash fire voltage, and improve corrosion resistance. , Strong anti-corrosion effect

Active Publication Date: 2011-11-09
GUANGDONG FENGHUA ADVANCED TECH HLDG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] (1) When the capacitor works in the circuit for a long time, the anode lead-out strip and the anode aluminum foil are prone to corrosion, and even the anode lead-out strips are all corroded and broken, making the product in an open circuit state and failing
[0004] (2) The product has poor high temperature stability. When the mains power fluctuates or works continuously for a long time, it is prone to flash fire, breakdown, short-circuit explosion, or even fire, causing safety accidents
[0005] (3) The product's ability to withstand ripple current is not enough. After a period of use, the internal pressure rises sharply, causing the bottom of the product to bulge or the explosion-proof plug to open, causing the electrolyte to be evaporated and the core to dry up.
[0006] (4) Due to the insufficient high temperature resistance of the electrolyte, the capacitance of the product is easy to decay and the loss rebounds quickly, resulting in an increase in ESR and a larger internal temperature rise of the capacitor, which prompts the product to fail early

Method used

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  • Electrolysis solution and preparation method thereof as well as preparation method for obtained aluminum capacitor
  • Electrolysis solution and preparation method thereof as well as preparation method for obtained aluminum capacitor

Examples

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Comparison scheme
Effect test

Embodiment 1

[0018] An electrolytic solution for aluminum electrolytic capacitors, its weight percent composition is No. 1 formula in Table 1, wherein: the main solvent is ethylene glycol, the auxiliary solvent is tributyl phosphate, the solute is ammonium sebacate, and the modifying additive is A mixture of pentaerythritol and polyethylene glycol, the hydrogen suppressant is p-hydroxyphenol, and the water-repelling agent is hypophosphorous acid. Heat ethylene glycol and tributyl phosphate to 70-90°C, add ammonium sebacate, heat to 110-135°C and turn off the heat, and finally add the mixture of pentaerythritol, polyethylene glycol, p-methylphenol and hypophosphite, Let it dissolve completely, and let it cool down naturally. The electrolyte was used to make 2200μF / 400 stud-type aluminum electrolytic capacitor products. The performance of the obtained products is shown in Table 2. After 8000 hours at 105°C, the performance of the product is still excellent (No. 1).

Embodiment 2

[0020] An electrolytic solution for aluminum electrolytic capacitors, its weight percent composition is No. 2 formula in Table 1, wherein: the main solvent is ethylene glycol, the auxiliary solvent is monobutyl phosphate, the solute is ammonium sebacate and 1.6-dodecyl Ammonium bis-acid, the modified additive is a mixture of phosphotungstic acid and ethyl orthosilicate, the hydrogen remover is p-hydroxyphenol, and the water-repelling agent is ammonium hypophosphite. Heat ethylene glycol and monobutyl phosphate to 70-90°C, add ammonium sebacate and 1.6-dodecanoate ammonium, heat to 110-135°C and turn off the heat, and finally add phosphotungstic acid and ethyl orthosilicate , the mixture of p-hydroxyphenol and ammonium hypophosphite, completely dissolve it, and let it cool down naturally. The electrolyte was used to make 2200μF / 400 stud-type aluminum electrolytic capacitor products. The performance of the obtained products is shown in Table 2. After 8000 hours at 105°C, the pro...

Embodiment 3

[0022] An electrolytic solution for an aluminum electrolytic capacitor, its weight percent composition is No. 3 formula in Table 1, wherein: the main solvent is ethylene glycol, the auxiliary solvent is diethylene glycol dibutyl ether, the solute is ammonium sebacate and 1.10- Ammonium dodecanoate, the modified additive is a mixture of citric acid and nano-silica, the hydrogen suppressor is p-hydroxyphenol, and the water-repelling agent is hypophosphorous acid. Heat ethylene glycol and diethylene glycol dibutyl ether to 70-90°C, add ammonium sebacate and 1.10-ammonium dodecanoate, heat to 110-135°C and turn off the heat, finally add phosphocitric acid, nanometer dioxide The mixture of silicon, p-hydroxyphenol and hypophosphorous acid is completely dissolved, and it can be cooled naturally. The electrolyte was used to make 2200μF / 400 bolt-type aluminum electrolytic capacitor products. The performance of the obtained products is shown in Table 2. After 8000 hours at 105°C, the p...

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Abstract

The invention relates to electrolysis solution and a preparation method thereof as well as a preparation method for an obtained aluminum capacitor. The electrolysis solution is composed by the components according to the following weight by parts: 38.5-85.7 wt % of primary solvent, 5-25 wt % of auxiliary solvent, 4-20 wt % of solute, 5-15 wt % of modified additive, 0.2-1 wt % of hydrogen eliminating agent and 0.1-0.5 wt % of waterproof combination agent. The primary solvent is glycol; the auxiliary solvent is one or more of tributyl phosphate, mono butyl ester phosphate, diglycol dibutyl ether; the solute is one or more of ammonium sebacate, 1.6-dodecyl ammonium bisgallic acid, 1.10-dodecyl ammonium bisgallic acid organic carboxylate. In the preparation method for the aluminum capacitor using the electrolysis solution, positive pressure and vacuum-pumping is required to be applied in an impregnation tank in an alternate recycle way with the recycle impregnation interval period being 20-60min.The electrolysis solution has the characteristics of high temperature resistance, high sparking pressure and strong corrosion resistance. The screw large capacitor has a service life of 8,000 hours at 105 DEG C or 2,000 hours at 125 DEG C.

Description

technical field [0001] The invention relates to an aluminum electrolytic capacitor, in particular to an electrolytic solution of an aluminum electrolytic capacitor and a preparation method thereof. Background technique [0002] With the rapid development of science and technology, the automotive electronics, program-controlled switches, frequency conversion controllers and UPS uninterruptible power supply industries have higher and higher requirements for bolted aluminum electrolytic capacitors. Due to the characteristics of the above-mentioned whole machine industry that the circuit is relatively complex and the use environment is harsh, aluminum electrolytic capacitors are required to have the characteristics of high temperature resistance, long life, large capacity and resistance to large ripple current impact. The working electrolyte system used in the existing bolt-type aluminum electrolytic capacitors is relatively single, and the high-temperature physical and chemical...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G9/035H01G9/145
Inventor 赵石华赵勇刚周庆波杨嘉敏
Owner GUANGDONG FENGHUA ADVANCED TECH HLDG
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