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:
Sep. 02, 2014
Filed:
Feb. 23, 2011
Ryuji Kohno, Mito, JP;
Ryuji Kohno, Mito, JP;
Hitachi Vehicle Energy, Ltd., Ibaraki, JP;
Abstract
A secondary battery adapted to minimize deterioration attributable to temperature is provided. In the secondary battery, a cross-sectionally elliptic electricity-generating element group in which a positive electrode sheet including at one side in a longitudinal direction thereof a section not coated with an active material mixture, and a negative electrode sheet including at one side in a longitudinal direction thereof a section not coated with an active material mixture are wound via separators is accommodated in a battery container. When a planar region of the electricity-generating element group is seen in plan view, the number of connections between the non-coated section of the positive or negative electrode sheet and a connecting surface of a positive or negative electrode connecting sheet is two for each of positive and negative electrodes, and a distance between the two connections is greater than ¼ of innermost circumferential length of the electricity-generating element group, but is smaller than ¼ of outermost circumferential length of the electricity-generating element group.