Electrolytic capacitor and method for manufacturing same

A technology of electrolytic capacitors and capacitors, which is applied in the manufacture of electrolytic capacitors, electrolytic capacitors, solid electrolytic capacitors, etc., to achieve the effects of long life, low ESR, and prevention of degradation of withstand voltage characteristics

Active Publication Date: 2015-09-16
NIPPON CHIMI CON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Like the anode foil, the cathode foil is also made of a valve metal such as aluminum, but only the surface is etched

Method used

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  • Electrolytic capacitor and method for manufacturing same
  • Electrolytic capacitor and method for manufacturing same
  • Electrolytic capacitor and method for manufacturing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0056] Next, the present invention will be described in more detail based on Examples and Comparative Examples produced as follows.

[0057] First, an electrode lead-out mechanism is connected to an etched anode foil having an oxide film layer formed on the surface, and an etched cathode foil having a 5V oxide film formed on the surface, and the two electrode foils are separated by cellulose fibers. The separator of the main body was wound to form a capacitor element with an element shape of 6.3φ×6.1L. Then, the capacitor element was immersed in an ammonium dihydrogenphosphate aqueous solution for 40 minutes to carry out repair chemical conversion. Next, immerse in an aqueous solution containing fine particles of PEDOT and a conductive polymer compound dispersion of polystyrenesulfonic acid, sorbitol, or sorbitol and a polyol, lift the capacitor element, and dry it at about 150°C. . Furthermore, the immersion-drying of the capacitor element in the conductive polymer compound...

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PUM

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Abstract

Provided are: an electrolytic capacitor having high withstand voltage, wherein deterioration of the withstand voltage characteristics due to lead-free reflow or the like can be prevented and the ESR characteristics can be improved; and a method for manufacturing the electrolytic capacitor. This electrolytic capacitor is obtained by: forming a solid electrolyte layer that contains 60-92 wt% of sorbitol or sorbitol and a polyhydric alcohol by impregnating a capacitor element, which is obtained by winding up a positive electrode foil and a negative electrode foil with a separator being interposed therebetween, with a dispersion that contains particles of a conductive polymer, sorbitol or sorbitol and a polyhydric alcohol, and a solvent; and filling pores in the capacitor element, which has been provided with the solid electrolyte layer, with an electrolyte solution that contains ethylene glycol.

Description

technical field [0001] The present invention relates to an electrolytic capacitor and a manufacturing method thereof, in particular to an electrolytic capacitor having good ESR characteristics and withstand voltage characteristics and a manufacturing method thereof. Background technique [0002] Electrolytic capacitors using valve-action metals such as tantalum or aluminum can obtain large capacitors with a small size by making the valve metal as the anode-side counter electrode into the shape of a sintered body or an etched foil to enlarge the surface of the dielectric. capacity and are therefore generally widely used. In particular, solid electrolytic capacitors that use solid electrolytes in the electrolyte are not only small, large-capacity, and low equivalent series resistance, but also have the characteristics of being easy to chip and suitable for surface mounting. , Low cost is indispensable. [0003] For such solid electrolytic capacitors, for small-sized and larg...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/028H01G9/035
CPCH01G9/035H01G9/028H01G9/0036H01G9/145H01G9/151H01G9/042
Inventor 小关良弥黑田宏一坂仓正郎松崎具弘中路贵之
Owner NIPPON CHIMI CON CORP
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