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Waterproofing 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, simple formulas, and realize the effects of industrialized production

Active Publication Date: 2019-04-19
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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  • Waterproofing and low-voltage aluminum electrolytic capacitor working electrolyte
  • Waterproofing and low-voltage aluminum electrolytic capacitor working electrolyte
  • Waterproofing 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 a...

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Abstract

The invention provides a waterproofing and low-voltage aluminum electrolytic capacitor working electrolyte and a preparation method and application thereof. The electrolyte includes a solute, a main solvent, an auxiliary solvent, a water repellent and other additives, and the water repellent is a mixture of ethylene glycol, lauryl phosphate and hexadecyl phosphate and is obtained by mixing the ethylene glycol, the lauryl phosphate and the hexadecyl phosphate with the ratio of 8:1:1 by the mass percent at the temperature of 100-120 DEG C. The electrolyte provided has good high-temperature stability, and the capacitor assembled by the electrolyte has a long service life at a high temperature, and can achieve a life of more than 20000h at a working voltage U<=100V under the temperature of 105DEG 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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IPC IPC(8): H01G9/035
CPCH01G9/035
Inventor 宋毅臻
Owner DONGGUAN DONGYANG SOLAR SCI RES & DEV CO LTD
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