Electrolyte for high-voltage soldering lug type aluminum electrolytic capacitor and preparation method thereof

An aluminum electrolytic capacitor and high-voltage welding technology, applied in the field of capacitors, can solve the problems of high loss angle, large capacity attenuation at low temperature, high failure rate, etc. Reduce the effect of capacity fade

Pending Publication Date: 2022-07-05
ZHUHAI GREE XINYUAN ELECTRONICS +1
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, the production of capacitors has the problems of high loss angle and large capacity attenuation at low temperature
However, using an electrolyte with a conductivity of 2.0±0.2ms/cm in the industry can solve the problem of a large loss angle, but the capacity attenuation at -40°C is usually ≥ 20%, which

Method used

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  • Electrolyte for high-voltage soldering lug type aluminum electrolytic capacitor and preparation method thereof
  • Electrolyte for high-voltage soldering lug type aluminum electrolytic capacitor and preparation method thereof
  • Electrolyte for high-voltage soldering lug type aluminum electrolytic capacitor and preparation method thereof

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Embodiment Construction

[0083] The present invention provides an electrolyte for a high-voltage solder chip aluminum electrolytic capacitor, which comprises the following components by mass percentage:

[0084] 48~78% ethylene glycol;

[0085] 1 to 9% of γ-butyrolactone;

[0086] 5-30% of any one of diethylene glycol butyl ether, propylene glycol butyl ether and ethylene glycol monomethyl ether;

[0087] 1-6% of ammonium sebacate;

[0088] 1 to 3% of ammonium dodecanoate;

[0089] 1-4% ammonium pentaborate;

[0090] 2-10% of 3-heptyl-2-ene-decanedioic acid or 3-octyl-2-ene-undecanedioic acid;

[0091] 0.1 to 1% of dibutyl phosphate;

[0092] 1~8% PVA-203 or PVA-403;

[0093] 0.1~3% triphenylphosphorus oxide;

[0094] 0.1-3% octahydroxyquinoline;

[0095] 0.1 to 5% of p-nitrobenzyl alcohol or p-nitroanisole.

[0096] High-voltage solder chip aluminum electrolytic capacitors made from the above components have the following characteristics:

[0097] 1) Under the low temperature environment of -...

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Abstract

The invention provides an electrolyte for a high-voltage soldering lug type aluminum electrolytic capacitor and a preparation method thereof, and the electrolyte comprises solvent ethylene glycol and gamma-butyrolactone. The cleaning agent further comprises any one of solvent diethylene glycol butyl ether, propylene glycol butyl ether and ethylene glycol monomethyl ether; the invention relates to a high-temperature-resistant and corrosion-resistant coating, which comprises a solute, and further comprises solute ammonium sebacate, ammonium dodecanedioate, ammonium pentaborate, 3-heptyl-2-ene-sebacic acid or 3-octyl-2-ene-undecanedioic acid. And additives such as dibutyl phosphate and the like are also included. The conductivity of the prepared electrolyte is 2.0 +/-0.2 ms/cm, meanwhile, the loss angle can be reduced by 0.02 on the original basis, meanwhile, the ripple current resistance is effectively improved, the capacity attenuation at the temperature of minus 40 DEG C can be reduced, the internal aging breakdown rate can be effectively reduced, and the production qualification rate can be increased.

Description

technical field [0001] The invention relates to the technical field of capacitors, in particular to an electrolyte for high-voltage solder chip aluminum electrolytic capacitors and a preparation method thereof. Background technique [0002] As a common device on electronic circuits, capacitors play the electrical functions of filtering, energy storage, bypassing, coupling, decoupling, and switching. The core device, among which the working voltage is mostly 400V-450V solder chip aluminum electrolytic capacitors. The conductivity of the more mature electrolyte currently used in the industry is usually 1.5±0.2ms / cm. [0003] However, the production of capacitors has the problems of high loss angle and large capacity attenuation at low temperature. The use of an electrolyte with a conductivity of 2.0±0.2ms / cm in the industry can solve the problem of large loss angle, but the capacity attenuation at -40°C is usually ≥20%, which cannot meet the requirements of some low-temperat...

Claims

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Application Information

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IPC IPC(8): H01G9/035H01G9/145
CPCH01G9/035H01G9/145
Inventor 袁伟刚范庆庆马义勋
Owner ZHUHAI GREE XINYUAN ELECTRONICS
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