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Over-wide-temperature low-voltage aluminium electrolytic capacitor working electrolyte and preparation method thereof

A technology of aluminum electrolytic capacitors and electrolytes, applied in electrolytic capacitors, capacitors, circuits, etc., can solve problems such as narrow operating temperature range, shortened service life, and impact on product life, and achieve extended operating temperature range, small vapor pressure, and improved The effect of high and low temperature life

Active Publication Date: 2017-08-29
NANTONG SUNION ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, there are two main low-voltage electrolytes used in low-voltage aluminum electrolytic capacitors. One is the water system, which is configured with high-purity ionized water and some organic straight-chain ammonium salts. It is characterized by high conductivity and low product loss, but the disadvantages are: , due to the high freezing point and high vapor pressure of water, the operating temperature range is narrow, and it is easy to cause problems under high and low temperature conditions and affect the life of the product. Generally, it can only be used at -40 ° C ~ 105 ° C; the second is γ-butane Esters, that is, γ-butyrolactone is used as a solvent, combined with quaternary ammonium salts. It is characterized by a greatly improved operating temperature range, which can generally be extended to -55 ° C ~ 130 ° C, but the conductivity is low. It leads to greater loss of products, higher temperature rise during use, and shortened service life

Method used

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  • Over-wide-temperature low-voltage aluminium electrolytic capacitor working electrolyte and preparation method thereof
  • Over-wide-temperature low-voltage aluminium electrolytic capacitor working electrolyte and preparation method thereof
  • Over-wide-temperature low-voltage aluminium electrolytic capacitor working electrolyte and preparation method thereof

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Embodiment 1

[0019] The invention provides an electrolyte solution for ultra-wide temperature and low-voltage aluminum electrolytic capacitors, which is composed of the following mass percentages and additions: solvent one is 60% to 82.95% of dimethylformamide; solvent two is 32.4% to 15% The methyl diethylene glycol ether; the pH regulator is triethylamine; the hydrogen remover is 2.5% to 1% p-nitroanisole and p-nitrobenzoic acid; the waterproof mixture is 0.1% to 0.05% triethylamine Polyphosphoric acid; a pressure-resistant stabilizer of 5% to 1% maleic acid-ethylene oxide copolymer with a degree of polymerization of 500 and nano-silica ethylene glycol solution; a solute of 5.8g to 25.3g / 100g of maleic acid in a solvent.

Embodiment 2

[0021] The ultra-wide temperature and low pressure working electrolyte is composed of the following mass percentages and additions: solvent one is 62% dimethylformamide; solvent two is 30.4% methyl diethylene glycol ether; triethylamine is used as a pH regulator, The pH value is finally controlled to be 6.5; the hydrogen remover is 2.5% p-nitroanisole; the water-proofing agent is 0.1% tripolyphosphoric acid; the pressure stabilizer is 5% maleic acid-ethylene oxide copolymer with a degree of polymerization of 500 ; The solute is maleic acid of 25g / 100g solvent.

Embodiment 3

[0023] The ultra-wide temperature and low pressure working electrolyte is composed of the following mass percentages and additions: solvent one is 65% dimethylformamide; solvent two is 27.92% methyl diethylene glycol ether; triethylamine is used as a pH regulator, The pH value of the control is finally 6.85; the dehydrogenation agent is 1.8% p-nitroanisole and 0.2% p-nitrobenzoic acid; the water-repellent cementing agent is 0.08% tripolyphosphoric acid; the pressure-resistant stabilizer is 3.5% polymerization degree 500 Maleic acid-ethylene oxide copolymer and 1.5% nano-silica ethylene glycol solution; solute is the maleic acid of 22.5g / 100g solvent.

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Abstract

The invention relates to over-wide-temperature low-voltage aluminium electrolytic capacitor working electrolyte. The electrolyte is formed by components according to the following proportion: 60% to 82.95% of first solvent, 32.4% to 15% of second solvent, 5.8g to 25.3g of solute per 100g of solvent, a PH regulator for regulating PH into a range of 3 to 7.5, 2.5% to 1% of hydrogen removal agent, 0.1% to 0.05% of hydration prevention agent and 5% to 1% of voltage-resistant stabilizer. Meanwhile, the invention further provides a preparation method of the over-wide-temperature low-voltage aluminium electrolytic capacitor working electrolyte. The over-wide-temperature low-voltage aluminium electrolytic capacitor working electrolyte and the preparation method thereof, which are disclosed by the invention, have the advantages that not only can harsh high and low temperature use temperatures be met, but also good product characteristics can be ensured, and the service life of a product is met.

Description

Technical field: [0001] The invention relates to a working electrolyte for an ultra-wide temperature low-voltage aluminum electrolytic capacitor of -60°C to +150°C and a preparation method thereof. Background technique: [0002] With the rapid development of electronic technology, aluminum electrolytic capacitors have the advantages of excellent performance, large capacity, low price, easy processing, convenient use, etc. The development of aluminum electrolytic capacitors has become a key and indispensable component in the electronics industry. [0003] On the other hand, with the development of superhuman-scale integrated circuits (VLSI), small-capacity capacitors are integrated into the circuit, and the development of IC has greatly increased the operating frequency of the circuit system, resulting in electrolytic capacitors being replaced by other capacitors in some circuits, but Since the power supply part of the IC circuit is always inseparable from the electrolytic c...

Claims

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Application Information

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IPC IPC(8): H01G9/035
CPCH01G9/035
Inventor 陈建华
Owner NANTONG SUNION ELECTRONICS