The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 04, 2000
Filed:
Feb. 23, 1998
Hisao Nakamaru, Kamakura, JP;
Norio Suzuki, Chigasaki, JP;
Toshihide Eguchi, Chigasaki, JP;
Masato Onishi, Fujisawa, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A cylindrical storage battery has a spirally coiled electrode plate assembly in which the shape of the current collector welded to the end part of the electrode plate assembly and the crossing parts of the rib-formed projections of the current collector and the electrode plate terminal edges are welded with sufficient strength to permit a high-rate charge and discharge. A storage battery having a spirally coiled electrode plate assembly includes a positive electrode plate, a negative electrode plate, a separator, and rectangular current collectors, respective ones of which are welded respectively to terminal edges of the electrodes respectively projecting outward from the upper and the lower end planes of the electrode assembly. The current collector welded to the end part of the electrode plate assembly has a flat plate part provided with rectangular cutout parts, in a radial manner and with equal intervals therebetween at four places, and which extend from the neighborhood of the center to the outer peripheral edge of the plate part, and rib-formed projections which are formed integrally, bent downward, at the two opposed edge parts of the respective cutout parts and are made to cross the terminal edge of the electrode plate and are welded thereto.