Patent ID: 6461759
Filing Date: 2002-10-08
Classification: H01M,Y02E,Y02P

Abstract:
An electrochemical cell, comprising:a) an anode electrode; b) a cathode electrode, wherein at least one of the anode electrode and the cathode electrode comprises a current collector having a generally rectangular shape provided by spaced apart first and second ends extending to and meeting with opposed generally straight first and second edges extending continuously along a length of the current collector between the first and second ends, and wherein the current collector is provided with an electrode active material contacted to at least one its major sides at spaced intervals along its length and extending substantially from the first edge to the second edge to provide the at least one electrode having bare regions substantially devoid of electrode active material and extending from the first edge to the second edge, the bare regions being located such that, when the anode electrode and the cathode electrode are wound around each other to form a wound cell stack having straight regions and bend regions, they are located in at least one of the bend regions of the wound cell stack; and c) a separator material disposed between the anode electrode and the cathode electrode; and d) an electrolyte activating and operatively associating the anode electrode and the cathode electrode.