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Method for mfg. electrolytic capacitor

A technology of electrolytic capacitors and manufacturing methods, applied in the direction of capacitor manufacturing, electrolytic capacitors, capacitors, etc., capable of solving problems such as insulation damage and short circuits of electrolytic capacitors

Inactive Publication Date: 2003-10-29
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Then, due to the change in the potential gradient of this part, insulation breakdown caused by electron avalanche occurs, and the electrolytic capacitor is short-circuited.

Method used

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  • Method for mfg. electrolytic capacitor
  • Method for mfg. electrolytic capacitor
  • Method for mfg. electrolytic capacitor

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Embodiment Construction

[0018] FIG. 1 is a flowchart of the manufacturing process of the electrolytic capacitor according to the embodiment of the present invention.

[0019] Corrosion treatment is performed first, and then lead wires 13 as external connection terminals are respectively connected to the anode foil 11 formed with a dielectric oxide film after corrosion treatment and the cathode foil 12 with enlarged surface area after corrosion treatment through riveting process 14 .

[0020] Next, the anode foil 11 and the cathode foil 12 are sandwiched between a porous separator 15 made of paper or polymer fibers, and wound up in a winding step 16 to obtain a capacitor element.

[0021] Next, a DC voltage is applied between the lead wires 13 of the capacitor element to check the insulation withstand voltage through a process of insulation withstand voltage inspection 17. In this inspection, a DC voltage of 600-1200V is applied between the lead wires to exclude discharged capacitor elements.

[0022]...

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Abstract

Connect the leads to the anode foil and cathode foil respectively. A capacitor element is formed by winding a separator sheet sandwiched between an anode foil and a cathode foil. By applying a DC voltage between the leads, the non-energized capacitor elements are sorted, the electrolyte is impregnated in the sorted capacitor elements, and then the capacitor elements impregnated with the electrolyte are inserted into the case to obtain an electrolytic capacitor. The capacitor element prepared by this method can ensure the insulation withstand voltage of the anode foil and the cathode foil, so that an electrolytic capacitor with high starting current resistance and high reliability can be obtained.

Description

technical field [0001] The present invention relates to a method of manufacturing electrolytic capacitors used in various electronic devices. Background technique [0002] In recent years, with the miniaturization of electronic equipment, electrolytic capacitors have also been significantly miniaturized, and with the digitalization of electronic equipment and the conversion of fluorescent lamps, etc., it is desired to have excellent high-frequency ripple absorption characteristics and low impedance with small internal resistance. electrolytic capacitor. [0003] exist Figure 4 A prior art electrolytic capacitor is shown in . The electrolytic capacitor element 47 includes: an anode foil to which an anode-side lead 41 is connected, a cathode foil 44 to which a cathode-side lead 43 is connected, separators 45, 46 sandwiched between the cathode foil 44 and the anode foil 42; . The capacitor element 47 is housed in a metal case (not shown) after being impregnated with an elec...

Claims

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Application Information

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IPC IPC(8): H01G9/02H01G9/00H01G9/028H01G9/04H01G13/00
Inventor 藤山辉已
Owner PANASONIC CORP