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:
May. 14, 2013
Filed:
Mar. 31, 2008
Eiji Okutani, Osaka, JP;
Atsushi Obayashi, Osaka, JP;
Tomokazu Yamanaka, Osaka, JP;
Yoshikumi Miyamoto, Osaka, JP;
Ryuji Oshita, Osaka, JP;
Eiji Okutani, Osaka, JP;
Atsushi Obayashi, Osaka, JP;
Tomokazu Yamanaka, Osaka, JP;
Yoshikumi Miyamoto, Osaka, JP;
Ryuji Oshita, Osaka, JP;
SANYO Electric Co., Ltd., Moriguchi-shi, Osaka, JP;
Abstract
Provided is a sealed battery that can offer excellent battery performances by having its electrode terminal and a current collector securely welded to each other, and its manufacturing method. The sealed battery is formed by hermetically sealing a casing storing an electrode assembly and the current collector, wherein: the electrode assembly formed by layering positive and negative electrode plates with a separator sandwiched therebetween is electrically connected to the current collector; and a shaft portion of the electrode terminal penetrates through the current collector. A part of the electrode terminal projecting out from a pass-through of the current collector is a (conical) frustum-shaped portion whose bottom base is in contact with the current collector. The frustum-shaped portion is pressed against the current collector, and the frustum-shaped portion and the current collector are welded together in at least one area on a perimeter of the bottom base of the frustum-shaped portion.