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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: 2008-10-22
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

Examples

Experimental program
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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 fiber, 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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PUM

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Abstract

By connecting lead wires severally to the anode foil and the cathode foil, coiling the anode foil and the cathode foil after arranging a separator between them to form the capacitor element, applying direct voltage between the lead wires of the capacitor element and checking the dielectric strength between the anode foil and the cathode foil to sort good and defective elements, immersing the sorted capacitor element in an electrolytic solution for drive, inserting the capacitor element into a metal case, and sealing the opening of the metal case by a sealing material, an electrolytic capacitor is obtained. The electrolytic capacitors manufactured by the method can secure the insulating voltage between anode foil and cathode foil, thus a highly reliable electrolytic capacitor that not have large inrush currents is 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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Patent Type & Authority Patents(China)
IPC IPC(8): H01G9/00H01G9/04H01G13/00H01G9/02H01G9/028
Inventor 藤山辉已
Owner PANASONIC CORP