Patent ID: 8206844
Filing Date: 2012-06-26
Classification: H01M,Y02E,Y02P

Abstract:
1. A battery comprising: a spirally wound electrode body obtained by layering and spirally winding a cathode, and an anode with a separator in between, the cathode having a cathode active material layer on a face of a strip-shaped cathode current collector, and the anode having an anode active material layer on a face of a strip-shaped anode current collector; and a tubular center pin that is arranged in a center of the spirally wound electrode body, the center pin including: a cut line in a longitudinal direction of the center pin formed by first sectional cuts through a wall thickness of the center pin, and a first cutout which is cut from the center pin and formed by second sectional cuts through the wall thickness of the center pin, wherein sectional surfaces of the second sectional cuts face each other, the sectional surfaces of the second sectional cuts intersect with the cut line, and a width of a gap between the sectional surfaces of the second sectional cuts which face each other is 0.1 mm to 2.0 mm.