Patent ID: 6548204
Filing Date: 2003-04-15
Classification: H01M,Y02E,Y02P

Abstract:
A sealed battery comprising:a can having an opening; a rolled electrode assembly inserted into the can, the rolled electrode assembly having first and second electrodes and a porous separator disposed between the first and second electrodes, the first electrode having a first base plate and a first active material deposited on the first base plate, and the second electrode having a second base plate and a second active material deposited on the second base plate; a cap assembly sealing the opening of the can, wherein central turns disposed around an imaginary central axis of the rolled electrode assembly support the rolled electrode assembly, the central turns including at least 1.5 turns of the first base plate; and an electrode tap connecting an innermost turn to the cap assembly, wherein turns of the second base plate start at a first point, spaced from a second point where the electrode tap is attached to the innermost turn of the first base plate, by 90-270Â°.