Patent ID: 7033697
Filing Date: 2006-04-25
Classification: H01M,Y02E,Y02P

Abstract:
1. A battery unit for a secondary battery comprising: a positive electrode plate having a positive electrode current collector, and positive electrode sheets selectively formed on surfaces of the positive electrode current collector; a positive electrode tab electrically connected to the positive electrode current collector and a protective tape wrapped around a portion protruding from the positive electrode current collector; a negative electrode plate having a negative electrode current collector and negative electrode sheets selectively formed on surfaces of the negative electrode current collector; a negative electrode tab electrically connected to the negative electrode current collector and a protective tape wrapped around a portion protruding from the negative electrode current collector; a separator interposed between the positive electrode plate and the negative electrode plate; and short circuit preventing units selectively formed on corresponding uncoated areas of the positive and negative electrode current collectors where the positive and negative electrode sheets are not formed, each short circuit preventing unit having a corresponding width greater than a width of the corresponding positive and negative electrode current collectors so as to cover at least a portion of the corresponding protective tape.