Heat applied electrochemical cell separator
AssigneeEnergizer Brands, LLC
InventorsDavid Kalisz, Johnson Mark, Allen Stieg, Maria Verikakis, Chris Bolyos
Life of this patent
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Abstract
A separator for a bobbin-style electrochemical cell is inserted into an interior opening within a ring-shaped cathode in an electrochemical cell can. An expansion force is then applied to an interior surface of the separator to press the separator against the interior walls of the cathode. A tool may then remove various creases and/or wrinkles in the separator and/or may then heat seal at least a portion of the tubular walls of the separator to minimize the void space between the separator and active material (e.g., cathode and/or anode) within the electrochemical cell.
Claims11
A method for forming a separator within an electrochemical cell, the method comprising:
- providing a cylindrical electrochemical cell can having an active material ring disposed proximate an interior surface of the cell can;
- pressing a separator into an opening within the active material ring;
- applying steam to the separator;
- and
- applying radial pressure to press the separator against interior walls of the active material ring.
A method for forming a separator within an electrochemical cell, the method comprising:
- providing a cylindrical electrochemical cell can having an active material ring disposed proximate an interior surface of the cell can;
- pressing a separator into an opening within the active material ring
- pressing a separator into the opening within the active material ring with a separator insertion tool;
- and
- inflating an expandable bladder portion of the separator insertion tool against the separator to apply radial pressure to press the separator against interior walls of the active material ring.
Dependencies are inferred from the claim text.