Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
Kiyomi Kozuki0
Date of Patent
April 20, 2010
0Patent Application Number
116463270
Date Filed
December 28, 2006
0Patent Citations Received
Patent Primary Examiner
Patent abstract
A sealed rechargeable battery has an electrode group formed by winding together a positive electrode and a negative electrode via a separator. A plurality of radial slits are provided in a welding section that is formed by an exposed section of a collector of at least one of the positive electrode and the negative electrode exposed at both ends of the electrode group. In the welding section, the exposed section is folded from the winding axis side toward the outer periphery to form a flat welding face.
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