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:
Mar. 10, 2026
Filed:
Dec. 21, 2018
Fdk Corporation, Tokyo, JP;
Hiroyuki Shibaoka, Tokyo, JP;
FDK CORPORATION, Tokyo, JP;
Abstract
Provided is a nickel-hydrogen secondary battery comprising a sealing body that seals an opening of an outer can, the sealing body includes a sealing plate, and a positive electrode cap welded to the sealing plate, the positive electrode cap includes a cylindrical body section, an annular flange provided along a circumferential edge of an opening located at a base end of the body section, and a top wall provided to close a tip opposite to the base end, and a welded part between the sealing plate and the positive electrode cap is located at a position where a ratio of X to R in percentage is 0% or more and 2% or less, in which R is a length from a center C of the flange to an outer circumferential edge of the flange, and X is a length from an edge of the welded part on an outer side in a radial direction of the flange to the outer circumferential edge of the flange.