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:
Feb. 18, 2003
Filed:
Sep. 01, 1999
Naoya Nakanishi, Osaka, JP;
Kouichi Satoh, Osaka, JP;
Kazuyasu Fujiwara, Osaka, JP;
Toshiyuki Nohma, Osaka, JP;
Ikuo Yonezu, Osaka, JP;
Sanyo Electric Co., Ltd., Osaka, JP;
Abstract
For use in lithium secondary cells, a positive electrode terminal and a negative electrode terminal are given an enhanced mechanical strength to improve the reliability of electrical connection between the cell and an external circuit, while the formation of oxide film on these terminals is inhibited to suppress the discharge voltage drop of the cell. To give these advantages to the lithium secondary cell embodying the invention, the positive electrode terminal is formed from an aluminum alloy containing magnesium and silicon in a combined amount of at least 1.0 wt. % as additive elements, and the negative electrode terminal is formed by plating a substrate of oxygen-free copper with nickel.