Group of winding electrodes

A method of fabricating a winding electrode assembly, comprising the steps of:

• manufacturing a cathode winding electrode by coating a slurry of a positive active material on a first metallic support, and drying and rolling said coated first metallic support;
• manufacturing an anode winding electrode by coating a slurry of a negative active material on a second metallic support, and drying and rolling said coated second metallic support;
• laying a separator between said cathode and anode winding electrodes;
• laying a separator fragment starting substantially at a winding axis of said winding electrodes and extending to an initial part of said cathode winding electrode;
• winding said cathode winding electrode, said anode winding electrode, said separator and said separator fragment;
• inserting the wound cathode winding electrode, anode winding electrode, separator and separator fragment into a can;
• injecting an electrolyte into said can;
• and
• mounting a cap assembly in a mouth of said can.

A winding electrode assembly, comprising:

• a cathode winding electrode;
• an anode winding electrode;
• a separator between said cathode and anode winding electrodes;
• and
• a separator fragment starting substantially at a winding axis of said winding electrodes and extending to an initial part of said cathode winding electrode.