Nippon Chemi-con Corporation

Fusayoshi Endoh

Osamu Nakamura

Koichi Yoshida

Takahiro Yoshida

Masashi Ozawa

Hirotsugu Ashino

Kentaro Nakaaki

Daizou Senzai

A capacitor includes a capacitor element having electrode foils on the anode side and the cathode side laminated via separators, connecting parts of terminal components being disposed inside a laminated portion of the electrode foils and the separators, the connecting parts being connected to the electrode foils on the anode side and the cathode side; and a case that includes a storage part storing the capacitor element and having an opening portion sealed by a sealing body, that has a crimped part crimped from the outside of the storage part toward a side surface of the capacitor element, and that holds the capacitor element with the crimped part. The case is crimped to form the crimped part while avoiding a position at which the electrode foils of the capacitor element in the storage part overlap with tip portions of the connecting parts of the terminal components.

Capacitor and manufacturing method therefor

An electrolytic capacitor according to the present invention employs a capacitor element wherein an anode foil having an anode internal terminal and a cathode foil having a cathode internal terminal are wound or laminated through a separator. The end of the anode foil faces with the cathode foil through the separator and the surface area of the cathode internal terminal is provided with an enlargement treatment, whereby the small area portion of the cathode foil that faces with the anode foil is eliminated, and the charge/discharge characteristics are thus improved. Furthermore, in the electrolytic capacitor provided with the capacitor element wherein the anode foil having the anode internal terminal and the cathode foil having the cathode internal terminal are wound or laminated through the separator, the capacitor element being impregnated with an electrolyte, the cathode internal terminal is composed of an aluminum material, the surface of the cathode internal terminal is etched and the concentration of iron in the etching layer is less than 300 ppm.

Electrolytic capacitor for use in a charge/discharge circuit with shorter period and greater voltage difference

Growing community of inventors

Tokyo, Japan

Fusayoshi Endoh