High-temperature-resistant long-service-life aluminum electrolytic capacitor

A technology of aluminum electrolytic capacitors and electrolytic capacitors, applied in the direction of electrolytic capacitors, liquid electrolytic capacitors, capacitors, etc., can solve problems such as electrolyte leakage, capacitor life failure, and capacitor failure, so as to improve the guaranteed life, improve temperature resistance, and improve The effect of conductivity

Active Publication Date: 2020-01-17
ZHAOQING BERYL ELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the electrolyte is temperature-resistant at 105°C or 115°C, the capacitor is likely to cause the explosion-proof valve of the capacitor to bulge due to the insufficient temperature resistance of the electrolyte at a high temperature working temperature above 115°C, and the electrolyte leaks, causing the capacitor to overheat. premature failure
Secondly, the applicant found that the conductivit

Method used

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  • High-temperature-resistant long-service-life aluminum electrolytic capacitor
  • High-temperature-resistant long-service-life aluminum electrolytic capacitor

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Embodiment

[0024] Such as figure 1 As shown, the present invention provides an aluminum electrolytic capacitor with high temperature resistance and long life. The aluminum electrolytic capacitor includes: a core package, a casing 40 arranged outside the core package, and glue covering the core package for sealing the casing 40 50 grains. The core pack includes anode foil 11 , cathode foil 12 , and electrolytic paper interposed between the anode foil 11 and the cathode foil 12 , laminated together with the anode foil 11 and the cathode foil 12 and wound into a core pack. Electrolytic paper can be designed with double or four layers. The anode foil 11 is connected with a positive lead pin 30 , and the anode foil 11 is connected with a negative lead pin 30 . Electrolyte is adsorbed in the core pack. The anode foil 11 and the cathode foil 12 are preferably aluminum foils. The positive electrode guide pin 30 and the negative electrode guide pin 30 are preferably aluminum guide pins.

[0...

specific Embodiment 1

[0036] 1) Solvent: 57.8% hexanediol;

[0037] 2) Solute: 15% ammonium hydrogen azelate, 5% ammonium dodecanoate, 3% diammonium hydrogen citrate, 7% ammonium isosebacate;

[0038] 3) Additives: 5% ammonium p-nitrobenzoate, 3% p-nitrophenol, 0.8% monobutyl phosphate, 0.8% ammonium hypophosphite, 1.0% nano-silica, 0.5% poly Ethylene oxide ether, 0.6% 8-hydroxyquinoline, 0.5% polymeric borate;

specific Embodiment 2

[0040] 1) Solvent: 40% hexanediol;

[0041] 2) Solute: 17% ammonium hydrogen azelate, 8% ammonium dodecanoate, 4% diammonium hydrogen citrate, 10% ammonium isosebacate;

[0042] 3) Additives: 8% ammonium p-nitrobenzoate, 5% p-nitrophenol, 2.0% monobutyl phosphate, 1.5% ammonium hypophosphite, 1.5% nano-silica, 1.0% poly Ethylene oxide ether, 1.0% 8-hydroxyquinoline, 1.0% polymeric borate;

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Abstract

The invention discloses a high-temperature-resistant long-service-life aluminum electrolytic capacitor, which comprises a core cladding, a shell arranged outside the core cladding, and colloidal particles covering the core cladding and used for sealing the shell, and is characterized in that the core cladding adsorbs electrolyte; the electrolyte is composed of a solvent, a solute and an additive,wherein the solvent of the electrolyte is ethylene glycol; the solute of the electrolyte comprises ammonium hydrogen azelate, ammonium dodecanedioate, diammonium hydrogen citrate and ammonium isosebacate; the additives comprise ammonium p-nitrobenzoate, p-nitrophenol, monobutyl phosphate, ammonium hypophosphite, nano silicon dioxide, polyethylene oxide ether, 8-hydroxyquinoline and polyborate. Through the electrolyte, the temperature resistance of the electrolyte can be improved, volatilization of the electrolyte at a high temperature is reduced, saturated vapor pressure is reduced, the conductivity of the electrolyte is improved, DF and ESR values of the capacitor are reduced, spontaneous heating in the capacitor is reduced, the high-voltage aluminum electrolytic capacitor can resist a high temperature of 115 DEG C or above, and the service life of the high-voltage aluminum electrolytic capacitor is guaranteed.

Description

technical field [0001] The invention relates to the technical field of capacitor manufacturing, in particular to an aluminum electrolytic capacitor with high temperature resistance and long service life. Background technique [0002] Aluminum electrolytic capacitors have a wide range of applications, such as LED general lighting. LED is recognized as the "green lighting" of the 21st century, with the characteristics of "high energy saving", "long life", "variety", "environmental protection" and "high-tech". LED general lighting has become an industry hotspot with the most market potential. With the continuous development of technology and cost optimization, higher requirements are put forward for the high temperature resistance and long life of aluminum electrolytic capacitors. [0003] At present, in the production industry of aluminum electrolytic capacitors for LEDs at home and abroad, the high temperature resistance of aluminum electrolytic capacitors is generally -25 ~...

Claims

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Application Information

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IPC IPC(8): H01G9/035H01G9/145
CPCH01G9/145H01G9/035
Inventor 陈家活刘泳澎黄汝梅李琳
Owner ZHAOQING BERYL ELECTRONICS TECH
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