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:
Aug. 16, 2011
Filed:
Jun. 02, 2010
Masanori Sumihara, Osaka, JP;
Tadashi Imai, Osaka, JP;
Masanori Sumihara, Osaka, JP;
Tadashi Imai, Osaka, JP;
Panasonic Corporation, Osaka, JP;
Abstract
An electrode group is constructed by disposing a positive electrode current collector exposed portion on one end side and a negative electrode current collector exposed portion on the other end side. A positive electrode current collector terminal plate and a negative electrode current collector terminal plate are connected to the positive and negative electrode current collector exposed portions, respectively. A conductive coned disc spring is disposed compressed between the positive electrode current collector terminal plate and a sealing plate. The coned disc spring has a dead zone in which the elastic force does not change according to the amount of deformation, and urges the negative electrode current collector terminal plate toward a bottom portion of a battery case with a defined elastic force.