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Electrolytic capacitor

A technology of electrolytic capacitors and solid electrolyte layers, applied in electrolytic capacitors, solid electrolytic capacitors, capacitors, etc., can solve problems such as difficult internal core pack repair work, and achieve excellent reliability

Inactive Publication Date: 2020-06-02
LELON ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the solid electrolytic capacitor forms a solid electrolyte layer during the production process, it is difficult to repair the internal core package in the later production process, so the working voltage has certain limitations.

Method used

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  • Electrolytic capacitor
  • Electrolytic capacitor
  • Electrolytic capacitor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] In the following examples, a wound-type electrolytic capacitor (Φ6.3 mm×L (length) 7.7 mm) having a rated voltage of 63 V and a rated capacitance of 22 μF was fabricated.

[0029] Electrolytic capacitors are manufactured according to the aforementioned manufacturing steps, and the materials used involve anode foil, cathode foil, separator paper, guide pin, fixing tape, rubber cover, aluminum case, dispersion liquid, electrolyte, etc.

[0030] For the produced electrolytic capacitors, electrostatic capacity and ESR were measured.

[0031] For the long-term reliability evaluation, apply the rated voltage while maintaining the temperature at 135°C for 1000 hours, and confirm the change rate of the electrostatic capacity (ΔDF135) and the increase rate of the ESR (ΔESR135).

[0032] Other examples and comparative examples were the same as in Example 1, and electrolytic capacitors were produced, and the electrolyte solution used or did not use ester compounds or sulfone compo...

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PUM

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Abstract

The invention discloses an electrolytic capacitor, and provides an electrolytic capacitor. The capacitor comprises a core package which is formed by winding an anode foil, a cathode foil, isolation paper and a guide pin; the core package is provided with a solid electrolyte layer. The capacitor is characterized in that the solid electrolyte layer is impregnated and filled with an electrolyte; theelectrolyte solution contains a solvent, and the solvent contains an ester compound and a sulfone compound; the content of the ester compound is 30% by mass or more, the content of the sulfone compound is 40% by mass or more, and the total content of the ester compound and the sulfone compound is 90% by mass or more. Thus, an electrolytic capacitor having excellent reliability is provided.

Description

technical field [0001] The present invention mainly relates to an electrolytic capacitor. Background technique [0002] Capacitors are the most commonly used passive components and are used in various electronic products. With the development of electronic products, capacitors with low equivalent series resistance (ESR) are widely used. In particular, low-ESR solid electrolytic capacitors that use conductive polymers such as polythiophene as the cathode and a solid electrolyte layer as the cathode. However, since the solid electrolytic capacitor forms a solid electrolyte layer during the production process, it is difficult to repair the internal core package in the later production process, so the working voltage has certain limitations. Contents of the invention [0003] The problem to be solved by the present invention is: [0004] For solid electrolytic capacitors for power supply and general electronic purposes, the required voltage is usually below 16 working volta...

Claims

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Application Information

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IPC IPC(8): H01G9/025H01G9/15H01G9/035
CPCH01G9/025H01G9/035H01G9/151
Inventor 林水渊吴中铭
Owner LELON ELECTRONICS