Electrolyte solution for electrolytic capacitor, and electrolytic capacitor

An electrolytic capacitor and electrolyte technology, applied in the direction of electrolytic capacitors, liquid electrolytic capacitors, solid electrolytic capacitors, etc., can solve the problems of shell container expansion, pressure rise, increase in height and size of electrolytic capacitors, etc., to suppress expansion and suppress pressure. rising effect

Pending Publication Date: 2022-07-08
富山药品工业株式会社
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In the reflow soldering process at such a high temperature, the following phenomenon is observed: the pressure inside the case container increases due to the gas generated from the electrolyte in the electrolytic capacitor, causing expansion of the case container, such as an increase in the height dimension

Method used

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  • Electrolyte solution for electrolytic capacitor, and electrolytic capacitor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0100] The capacitor element obtained above is immersed in the above-mentioned conductive polymer dispersion liquid, the capacitor element is lifted up, and then the solvent is evaporated to form a solid electrolyte layer containing a conductive polymer.

[0101] Next, each component of salicylic acid, boric acid, dimethylethylamine, and ethylene glycol in the amounts described in Table 1 was mixed while stirring at 90 to 95° C. to prepare an electrolytic solution, and the electrolytic solution was impregnated into the capacitor element. Next, the capacitor element was inserted into a bottomed cylindrical metal aluminum case (thickness of case material: 0.3 mm), a sealing rubber was attached to the opening end, and the sealing was performed by crimping. Then, aging treatment was performed on the condition of 105 degreeC, and the aluminum electrolytic capacitor was produced.

[0102] The rated voltage of the electrolytic capacitor was 35V, and the external dimensions of the se...

Embodiment 2～10、 comparative example 1～5

[0104]Examples 2 to 10 and Comparative Examples were prepared in the same manner as in Example 1, except that the electrolyte solution obtained by mixing the components in the amounts shown in Table 1 while stirring at 90 to 95° C. was used. 1 to 5 electrolytic capacitors.

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Abstract

Provided is an electrolytic solution for an electrolytic capacitor, which is capable of suppressing expansion of a housing container even during reflow soldering. The electrolytic solution for an electrolytic capacitor is characterized in that: the electrolytic solution for an electrolytic capacitor comprises a capacitor element having a positive electrode foil having a dielectric oxide film layer on the surface thereof, a negative electrode foil, and a solid electrolyte layer, and an electrolytic solution impregnated into the capacitor element inside a housing container; the electrolytic solution contains an organic carboxylic acid having a hydroxyl group, a boron compound, and a solvent, the content of the boron compound being 0.6 mol or more with respect to 1 mol of the organic carboxylic acid having a hydroxyl group, the solvent containing a protic organic solvent, and the content of the boron compound being 1 mol or more when the electrolytic capacitor is exposed to a high temperature of 250 DEG C or more. A pressure increase in the outer shell container can be suppressed.

Description

technical field [0001] The present invention relates to an electrolytic solution for an electrolytic capacitor capable of suppressing expansion of a case container even when exposed to a high-temperature atmosphere in a reflow process or the like, and an electrolytic capacitor using the electrolytic solution. Background technique [0002] In recent years, in audio-visual (AV) equipment, in-vehicle electrical equipment, and the like, expectations for higher reliability have been increasing, and electrolytic capacitors used in these have also been required to be small, large-capacity, and high-frequency equivalent series resistance ( Hereinafter, it is also referred to as ESR) and other properties. [0003] In particular, as the frequency of electronic equipment increases, electrolytic capacitors are also required to be large-capacity electrolytic capacitors having excellent ESR characteristics in a high-frequency region. Recently, in order to reduce the ESR in such a high-fr...

Claims

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Application Information

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IPC IPC(8): H01G9/035
CPCH01G9/035H01G9/145H01G9/15H01G9/022
Inventor 秋本启太石田晃浩佐野信原部实成永山裕贵浦本昌英
Owner 富山药品工业株式会社
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