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Middle-high voltage aluminum electrolytic capacitor electrolyte

A technology of aluminum electrolytic capacitors and electrolytes, applied in electrolytic capacitors, capacitors, circuits, etc., can solve problems such as unsuitability for manufacturing high-voltage electrolytic capacitors, deterioration of electrical properties of dielectric oxide films, loss of capacitor capacity, etc., to achieve small resistivity, The effect of long service life and low loss

Inactive Publication Date: 2014-10-22
宁国市裕华电器有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the service life of this invention is short, and the generated water will hydrate the anodic oxide film at high temperature, resulting in the loss of capacitor capacity and the deterioration of the electrical properties of the dielectric oxide film, making this electrolyte unsuitable for manufacturing high-voltage electrolytic capacitors of the 105°C series.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] An electrolyte solution for medium and high voltage aluminum electrolytic capacitors, including the following raw materials in weight percentage: 10% of the main electrolyte, 5% of the auxiliary dielectric, 3% of the copolymer of polyvinyl alcohol and propylene oxide, 38% of sorbitol, and 38% of diethylene glycol %, hydrogen remover 3%, citrate 3%; the main electrolyte is ammonium dodecanoate; the auxiliary electrolyte is sulfamic acid. The present invention can work stably at 105°C, 500-800V, work for 1000 hours, no leakage current phenomenon occurs, meet the basic requirements of flash fire voltage, and have small resistivity; the working electrolyte of the present invention has strong oxidation formation ability, high voltage resistance, Good high temperature resistance, low loss and long service life.

Embodiment 2

[0017] An electrolyte solution for medium and high voltage aluminum electrolytic capacitors, comprising the following raw materials in weight percentage: 20% of the main electrolyte, 10% of the auxiliary dielectric, 6% of polytitanate, 26% of sorbitol, 27% of diethylene glycol, and 6 hydrogen suppressants %, hypophosphite 5%; the main electrolyte is ammonium dodecanoate; the auxiliary electrolyte is sulfamic acid. The present invention can work stably at 105°C, 500-800V, work for 1000 hours, no leakage current phenomenon occurs, meet the basic requirements of flash fire voltage, and have small resistivity; the working electrolyte of the present invention has strong oxidation formation ability, high voltage resistance, Good high temperature resistance, low loss and long service life.

Embodiment 3

[0019] An electrolyte solution for medium and high voltage aluminum electrolytic capacitors, comprising the following raw materials in weight percentage: 18% of the main electrolyte, 9% of the auxiliary dielectric, 5% of the copolymer of polyvinyl alcohol and propylene oxide, 30% of sorbitol, and 30% of diethylene glycol %, hydrogen remover 4%, citrate 3%; the main electrolyte is ammonium dodecanoate; the auxiliary electrolyte is sulfamic acid. The present invention can work stably at 105°C, 500-800V, work for 1000 hours, no leakage current phenomenon occurs, meet the basic requirements of flash fire voltage, and have small resistivity; the working electrolyte of the present invention has strong oxidation formation ability, high voltage resistance, Good high temperature resistance, low loss and long service life.

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Abstract

The invention relates to the technical field of capacitor electrolyte, and discloses a middle-high voltage aluminum electrolytic capacitor electrolyte. The middle-high voltage aluminum electrolytic capacitor electrolyte comprises the raw materials in percentages by weight as follows: 10-20% by weight of main electrolyte, 5-10% by weight of auxiliary electrolyte, 3-6% by weight of multi-polar-radical high polymer, 26-38% by weight of sorbitol, 27-38% by weight of diethylene glycol, 3-6% by weight of a hydrogen elimination agent, and 3-5% by weight of an additive agent, wherein the main electrolyte is ammonium dodecanedioate; the auxiliary electrolyte is sulphamic acid. According to the invention, the ammonium dodecanedioate serves as the main electrolyte, the sulphamic acid serves as the auxiliary electrolyte, and the multi-polar-radical high polymer is added at the same time, so that the middle-high voltage aluminum electrolytic capacitor electrolyte can work stably at 105 DEG C and 500-800 V for 1000 hours without any current leakage phenomenon, meets with the basic demands of a flash fire voltage and achieves a small specific resistance. The middle-high voltage aluminum electrolytic capacitor electrolyte disclosed by the invention is strong in oxidization forming capability, high-voltage resistant, good in high-temperature resistance, low in loss and long in service life.

Description

technical field [0001] The invention relates to the technical field of capacitor electrolytes, in particular to an electrolyte for medium and high voltage aluminum electrolytic capacitors. Background technique [0002] The working electrolyte is the actual cathode of the electrolytic capacitor, which plays an important role in providing oxygen ions and repairing the anodic oxide film. Therefore, developing a high-performance working electrolyte is crucial to ensure the performance of capacitors. [0003] Traditional working electrolyte boric acid + ethylene glycol system: This system is the electrolyte used in the early days of aluminum electrolytic capacitors. The electrolyte prepared by this method has the advantages of mature technology, simple operation of the preparation process, low preparation cost and easy market purchase, and can meet the electrical performance of capacitors in general working conditions. However, such an electrolyte produces crystallization water...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/035
Inventor 陈忠友
Owner 宁国市裕华电器有限公司
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