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:
Dec. 30, 2014
Filed:
Jan. 12, 2011
Kunihiko Mineya, Osaka, JP;
Kunihiko Mineya, Osaka, JP;
Panasonic Corporation, Osaka, JP;
Abstract
A lithium ion secondary battery includes: an electrode assembly including a positive electrode plate, a negative electrode plate, and a separator; and an elastic member. The electrode assembly is wound around an axis into a flat shape having a curved end defining a corner portion. The elastic member is arranged inside the electrode assembly and into at least the corner portion of the electrode assembly such that at least a portion of the elastic member is positioned between at least a portion of one of the positive electrode plate and the negative electrode plate and at least a portion of the separator in a direction perpendicular to the axis. The elastic member is made of a material having porosity.