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:
Oct. 01, 2002
Filed:
Mar. 29, 2001
Atsushi Yanai, Osaka, JP;
Kazunari Ohkita, Osaka, JP;
Katsunori Yanagida, Osaka, JP;
Takeshi Maeda, Osaka, JP;
Atsuhiro Funahashi, Osaka, JP;
Yoshito Chikano, Osaka, JP;
Toshiyuki Nohma, Osaka, JP;
Ikuo Yonezu, Osaka, JP;
Koji Nishio, Osaka, JP;
Sanyo Electric Co., Ltd., Osaka, JP;
Abstract
A nonaqueous electrolyte secondary cell having a rolled-up electrode unit housed in a cell can and comprising a positive electrode and a negative electrode each formed by coating a surface of a striplike current collector with an electrode material. According to a first embodiment, the current collector of at least one of the positive electrode and the negative electrode comprises a plurality of current collector pieces arranged along one direction and a PTC element interconnecting each pair of adjacent current collector pieces Alternatively with a second embodiment, at least one of the positive electrode and the negative electrode comprises a PTC element held between opposed faces of an uncoated portion of the current collector thereof and a base end portion of a current collector tab. The PTC element serves to prevent continuous occurrence of a current in excess of a predetermined value and realizes a high energy density.