Electrochemical cell with anode material in protrusion

An electrochemical cell comprising:

• a can comprising a first cylindrical side wall extending from a closed end wall, the closed end wall defining a protrusion with a protrusion cavity therein;
• a separator positioned within the can comprising a bottom surface defined by a bottom surface wall, the bottom surface wall being convex to extend into the protrusion cavity, wherein the separator defines an inner cavity and separates the inner cavity from an outer cavity defined by the can and the separator, and wherein the inner cavity extends into the protrusion cavity;
• a cathode electrode material disposed in the outer cavity;
• and
• an anode electrode material disposed in at least a portion of the inner cavity.

A method for manufacturing an electrochemical cell, the method comprising:

• providing a can comprising a cylindrical side wall extending from a closed end wall, the closed end wall comprising a protrusion with a protrusion cavity therein;
• inserting cathode electrode material into the can to form a cathode electrode material ring;
• inserting a separator into the cathode electrode material ring, the separator comprising a convex bottom surface that extends into the protrusion cavity;
• placing anode electrode material into an inner cavity defined by the separator, wherein the inner cavity extends into the protrusion cavity;
• and
• sealing a first end of the can opposite the closed end wall.