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650V aluminum electrolytic capacitor working electrolyte

A technology for aluminum electrolytic capacitors and electrolytes, applied in electrolytic capacitors, capacitors, circuits, etc., which can solve problems such as no conductance, reduced conductivity of electrolytes, and increased difficulty in impregnating aluminum electrolytic capacitors

Active Publication Date: 2016-02-03
DONGGUAN HEC CONDENSER CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally, in order to obtain high flash voltage, the flash enhancer used in the electrolyte for high-voltage aluminum electrolytic capacitors is polyethylene glycol, polyvinyl alcohol borate, polyvinyl phosphate, ammonium polyacrylate, and nano-inorganic oxides. Particles, one or several kinds of polypropylene oxide ethers, but they have no electrical conductivity themselves, and are only used as flash fire enhancers
Therefore, if the flash voltage of the electrolyte is to meet the requirements, a large amount of such flash voltage booster must be added, because the electrolyte is the actual cathode of the aluminum electrolytic capacitor, and the conductive carriers of the cathode are no longer free electrons but ions, so these additives can not enhance the ionic conductivity of the electrolyte, but greatly reduce the conductivity of the electrolyte, and also increase the impregnation difficulty in the production process of aluminum electrolytic capacitors, causing the electrical properties of the capacitor to decrease, such as dielectric loss factors Increase or decrease in capacitance, product breakdown, etc., seriously shorten the service life of capacitors
[0004] Patent CN101599367B provides an aluminum electrolytic capacitor, but the withstand voltage of the capacitor is only 600V

Method used

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  • 650V aluminum electrolytic capacitor working electrolyte
  • 650V aluminum electrolytic capacitor working electrolyte
  • 650V aluminum electrolytic capacitor working electrolyte

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Configure the electrolyte according to the formula in Table 1, and use the prepared electrolyte to make 10 aluminum electrolytic capacitors, each of which is used for life test. The specifications of aluminum electrolytic capacitors are: 650V, 1200μF, Φ76*170mm, according to the IEC-60384-4-1-2007 standard test its capacity C (μF), loss Tanδ (%), leakage current I (μA), and load After 5000 hours, test its capacity C (μF), capacity change percentage ΔC (%), loss Tanδ (%), and leakage current I (μA). The load conditions are 85°C, 120Hz, and ripple current 15.8A / piece. The test results are shown in Table 7.

[0031] The formula of table 1 embodiment 1

[0032]

Embodiment 2

[0034] Configure the electrolyte according to the formula in Table 2, and use the prepared electrolyte to make 10 aluminum electrolytic capacitors, each of which is used for life test. Test items and standards are the same as in Example 1. The test results are shown in Table 7.

[0035] The formula of table 2 embodiment 2

[0036]

[0037]

Embodiment 3

[0039] Configure the electrolyte according to the formula in Table 3, and use the prepared electrolyte to make 10 aluminum electrolytic capacitors, each of which is used for life test. Test items and standards are the same as in Example 1. The test results are shown in Table 7.

[0040] The formula of table 3 embodiment 3

[0041]

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Abstract

The invention provides a 650V aluminum electrolytic capacitor working electrolyte, and an aluminum electrolytic capacitor made by using the electrolyte. The aluminum electrolytic capacitor working electrolyte is composed of solutes, solvents and an additive, wherein the main solute is fatty acid whose main carbon chain has 32 or 34 carbon atoms and which has a side branch chain or ammonium salt thereof; the auxiliary solute is C8 to C16 carboxylic acid; the main solvent is selected from ethylene glycol, n-butanol, diethylene glycol, n-octanol, gamma-butyrolactone, and butyl acetate; and the auxiliary solvent is selected from benzyl alcohol, 1-hydroxy-2-methoxyethane, diethylene glycol monomethylether, ethylene glycol monobutyl ether, propylene glycol or diethylene glycol. The aluminum electrolytic capacitor has advantages of high voltage resistance, large ripple current, long service life and the like, and fills blanks of the aluminum electrolytic capacitor that the national rated voltage reaches 650V.

Description

technical field [0001] The invention specifically relates to the working electrolyte of an aluminum electrolytic capacitor, and also relates to an aluminum electrolytic capacitor. Background technique [0002] Aluminum electrolytic capacitors are essential components in the terminals of various electronic products, and play a vital role in applications such as industry and power supply. In recent years, with the rapid development of small-volume, high-stable performance technologies in new technology fields such as high-voltage inverters, electric vehicles, wind power, and photovoltaic power generation, manufacturers have proposed high-voltage, large-ripple current, and high-voltage capacitors for capacitors. Long life requirements. In order to adapt to this trend, 650V ultra-high voltage aluminum electrolytic capacitors have been developed. [0003] The electrolyte is the real cathode of the aluminum electrolytic capacitor, which plays an important role in providing oxyge...

Claims

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Application Information

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IPC IPC(8): H01G9/035
Inventor 陈如祥何凤荣董维福宋毅臻
Owner DONGGUAN HEC CONDENSER CO LTD
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