Lithium replenishment cell to enhance beginning of life capacity
AssigneeFord Global Technologies, LLC
InventorsChristian Edward Shaffer, Rutooj D. Deshpande, Satish B. Chikkannanavar
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Abstract
A method for fabricating an electrode sandwich includes, responsive to an amount of cyclable lithium lost being greater than a predefined threshold, initiating, by a controller, current flow between the sandwich and a lithium replenishment electrode in ionic conductivity with the sandwich via replenishment gaps to transfer lithium thereto, and, responsive to an amount of transferred lithium corresponding to the amount lost, hot-press sealing the replenishment gaps and detaching the replenishment electrode from the sandwich.
Claims20
A method for fabricating an electrode sandwich, comprising:
- responsive to an amount of cyclable lithium lost being greater than a predefined threshold, initiating, by a controller, current flow between the sandwich and a lithium replenishment electrode in ionic conductivity with the sandwich via replenishment gaps to transfer lithium thereto;
- and,
- responsive to an amount of transferred lithium corresponding to the amount lost, hot-press sealing the replenishment gaps and detaching the replenishment electrode from the sandwich.
A battery cell, comprising:
- an electrode sandwich having a pair of opposing walls;
- a gassing pouch connected along the first wall and defining a gassing gap therebetween, the gassing gap configured to transfer gasses from the electrode sandwich to the gassing pouch;
- and
- a lithium replenishment electrode region connected along a second wall and defining a replenishment gap therebetween, the replenishment gap configured to transfer lithium ions from the region to the sandwich.
A method for fabricating an electrode sandwich of a battery cell, comprising:
- responsive to a solid electrolyte interphase layer forming in the sandwich, initiating, by a controller, current flow between the sandwich and a lithium replenishment electrode in ionic conductivity therewith via a replenishment gap to cause the replenishment electrode to supply lithium to the sandwich;
- and,
- responsive to an amount of the supplied lithium corresponding to an amount of lithium lost during the forming, hot-press sealing the replenishment gap and detaching the replenishment electrode.
Dependencies are inferred from the claim text.