A waterproof and low-voltage aluminum electrolytic capacitor working electrolyte

A technology of aluminum electrolytic capacitors and electrolytes, applied in electrolytic capacitors, capacitors, circuits, etc., can solve problems such as oxide film performance damage, achieve low production costs, good high temperature stability, and realize the effect of industrialized production

Active Publication Date: 2022-04-29
DONGGUAN DONGYANG SOLAR SCI RES & DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the working electrolyte with more water has many advantages above, the following disadvantages cannot be ignored: the working electrolyte with more water is easy to hydrate with the oxide film on the surface of the anode aluminum foil, so that the performance of the oxide film is affected. Damage (that is, the ability of water to damage the oxide film is much greater than the ability to repair the oxide film), so the product fails prematurely, which is more obvious under high temperature conditions

Method used

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  • A waterproof and low-voltage aluminum electrolytic capacitor working electrolyte
  • A waterproof and low-voltage aluminum electrolytic capacitor working electrolyte
  • A waterproof and low-voltage aluminum electrolytic capacitor working electrolyte

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Embodiment 1 Electrolyte formula and preparation thereof

[0034]

[0035] Preparation process: According to the components in the above table, firstly, heat the main solvent and auxiliary solvent to 60°C and mix them, add the solute adipic acid and ammonium formate, then add the waterproofing agent and other additives and stir for 15 minutes at a constant temperature of 110°C , cooled to room temperature to obtain an electrolyte.

Embodiment 2

[0036] Embodiment 2 electrolyte formula and preparation thereof

[0037]

[0038] Preparation process: According to the components in the above table, firstly, heat the main solvent and auxiliary solvent to 60°C and mix them, add the solute adipic acid and ammonium formate, then add the waterproofing agent and other additives and stir for 15 minutes at a constant temperature of 110°C , cooled to room temperature to obtain an electrolyte.

Embodiment 3

[0039] Embodiment 3 performance test

[0040] The working electrolyte parameters are shown in Table 1.

[0041] Table 1 Working Electrolyte Test Parameters

[0042] performance parameters Example 1 Example 2 moisture content 25.0％ 20.0％ Conductivity (30℃ms / cm) 35 20 pH 6.68 6.33 Flash voltage 150 280 Low temperature characteristics (-40℃) Not frozen, not precipitated out Not frozen, not precipitated out

[0043] The electrical characteristics of the electrolytic capacitor obtained by using the electrolyte of Example 1 of the present invention at a working voltage of 6.3V to 35V are as shown in Table 2; The characteristics are shown in Table 3.

[0044] Table 2 Electrical characteristics under 6.3V~35V working voltage (taking 6.3V 1500μf specification as an example)

[0045]

[0046] Table 3: Electrical characteristics under 50V ~ 100V working voltage (taking 100V 330μf specification as an example)

[0047]

[0048...

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PUM

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Abstract

The invention provides a waterproof and low-voltage aluminum electrolytic capacitor working electrolyte, its preparation method and application. Described electrolytic solution comprises solute, main solvent, auxiliary solvent, water-repelling agent and other additives, and wherein, water-repelling agent is the mixture of ethylene glycol, dodecyl phosphate and hexadecyl phosphate, consists of ethylene glycol, decyl phosphate It is obtained by mixing dialkyl phosphate and hexadecyl phosphate at a mass percentage of 8:1:1 at a temperature of 100-120°C. The electrolytic solution provided by the invention has good high-temperature stability, and the capacitor assembled therefrom has a long high-temperature service life, and can realize a service life of more than 20,000 hours at an operating voltage U≤100V and 105°C.

Description

technical field [0001] The invention relates to the technical field of working electrolyte for aluminum electrolytic capacitors, in particular to a working electrolyte for waterproof and low-voltage aluminum electrolytic capacitors, its preparation method and application. Background technique [0002] With the rapid development of electronic technology, aluminum electrolytic capacitors, as one of the basic components of electronic products, have been more and more widely used, and the accompanying aluminum foil corrosion technology for aluminum electrolytic capacitors is also constantly developing. The specific volume of the aluminum foil of the capacitor is getting higher and higher, the volume is getting smaller and smaller, and the loss value of the capacitor is relatively large, especially in the high-frequency field, the impedance value is large, which is very obvious in the water-containing low-voltage aluminum electrolytic capacitor. [0003] The quality and performan...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G9/035
CPCH01G9/035
Inventor 宋毅臻
Owner DONGGUAN DONGYANG SOLAR SCI RES & DEV CO LTD
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