Patent ID: 6420065
Filing Date: 2002-07-16
Classification: H01M,Y02P,Y10T

Abstract:
A wound electrochemical cell formed as a coil with a first and a second coil edge and wound from a laminate having a length and a width, a first and a second edge extending along the length and a first and a second end extending along the width, the laminate being wound in a length direction from the first end to the second end in at least five turns, including an initial turn and a final turn,the laminate comprises a first electrode structure having a length and a width and a thickness, a first and a second edge extending along the length, and a first and a second end extending along the width, the first electrode structure consisting of a first current collector foil, coated on at least a part of a first and a part of a second side with a first electrode material; a second electrode structure having a length and a width and a thickness, a first and a second edge extending along the length, and a first and a second end extending along the width, the second electrode structure consists of a second current collector foil, coated on at least a part of a first and a part of a second side with a second electrode material; an electrolyte structure interposed between the first and the second electrode materials and thereby isolating the first and the second electrode materials from each other; in at least the final turn and in the next to final turn, the first current collector has a protruding part extending beyond at least the first edge along the length of the second current collector, in at least the initial turn, the second current collector has a protruding part extending beyond the first edge along the length of the first collector, the protruding parts of the current collectors along at least the first edge of the laminate are sealed together.