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:
Apr. 16, 2002
Filed:
Apr. 26, 2000
Tsuyoshi Kitami, Tokyo, JP;
Hiromi Suzuki, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
The present invention provides a nonaqueous electrolyte secondary battery comprising: a battery case; a battery element accommodated in the battery case, the battery element comprising laminations of a first polarity type electrode, a second polarity type electrode and a separator sandwiched between the first polarity type electrode and the second polarity type electrode, the first polarity type electrode comprising a first polarity type collector which is provided with at least a first polarity type electrode active material layer except for a first side region extending along one side of the first polarity type collector, and the second polarity type electrode comprising a second polarity type collector which is provided with at least a second polarity type electrode active material layer except for a second side region extending along one side of the second polarity type collector, the first side region of the first polarity type collector projecting from first side edge of the separator and the second side region of the second polarity type collector projecting from second side edge of the separator, so that the battery element has a bottom portion which comprises the first side region of the first polarity type collector and a top portion which comprises the second side region of the second polarity type collector; a bottom conductive elastic material on a bottom of the battery case, and the bottom conductive elastic material being in contact with a substantially entire part of the bottom portion of the battery element; and a top conductive elastic material on a top of the battery case, and the top conductive elastic material being in contact with a substantially entire part of the top portion of the battery element.