Patent ID: 7258948
Filing Date: 2007-08-21
Classification: H01M,Y02E,Y02P,Y10T

Abstract:
1. A non-aqueous electrolyte secondary battery having a coiled electrode assembly made through the multilayer-winding of: an positive electrode having a metallic collector coated with an positive electrode mixture, composed of an positive electrode active material that occludes and liberates lithium ions; a negative electrode having a metallic collector coated with a negative electrode mixture, composed of a negative electrode active material that occludes and liberates lithium ions; and a separator interposed between the positive electrode and the negative electrode, wherein the positive electrode has an insulating layer of a heat seal tape adhered with an adhesive material which has increased adhesiveness at 60 to 120° C. and extremely low adhesiveness at room temperature or a hot melt coated resin, with a softening point of 50° C. or higher on a portion of the metallic collector uncoated with the positive electrode mixture and opposed to a part of the negative electrode coated with the negative electrode mixture through the separator which uses a microporous film.