Aluminum electrolytic capacitor

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United States of America Patent

PATENT NO 7990681
APP PUB NO 20090207557A1
SERIAL NO

12300058

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Abstract

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An aluminum electrolytic capacitor having an excellent short-circuit resistance, high capacitance, long life, and low equivalent series resistance (ESR) is provided. For this purpose, the aluminum electrolytic capacitor includes a capacitor element having a positive electrode foil, a first separator, a negative electrode foil, and a second separator, which are sequentially laminated one on another and wound together. After the capacitor element is impregnated with a driving electrolyte solution and housed in a metallic case, an open end of the metallic case is sealed with a sealing material. A ratio of B/A, i.e. a ratio of total thickness B of the first and second separators after winding with respect to total thickness A of the first and second separators before winding, is set in the range from 0.5 to 0.8.

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Patent Owner(s)

Patent OwnerAddress
PANASONIC CORPORATION1006 OAZA KADOMA KADOMA-SHI OSAKA 5718501 ?5718501

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Furusawa, Shigetaka Kyoto, JP 14 162
Imamoto, Kazunari Yamaguchi, JP 7 24
Matsuura, Hiroyuki Shiga, JP 122 1565
Nagara, Hisao Kyoto, JP 9 64

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