Highly resistive cell separator for bi-polar battery
AssigneeAlliant Techsystems Inc.
InventorsMilind V. Kulkarni, William J. Eppley
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Abstract
Material is incorporated in each of the cell separator membranes of an electrochemical cell having a layered construction wherein a plurality of commonly connected metal anode layers and a plurality of commonly connected cathode layers are arranged in a closely packed, stacked sandwich construction, separated by a plurality of thin insulating separator membranes which gives each cell separator a known resistance value which can be measured thereby allowing total cell resistance to be readily tested.
Claims5
In an electrochemical cell having a bi-polar layered construction wherein a plurality of commonly connected metal anode layers and a plurality of commonly connected cathode layers are alternately arranged in closely packed, sandwich fashion, each anode and cathode layer being separated by one of a plurality of thin insulating separator membranes to produce a cell stack, the improvement comprising incorporating conductive material in each of the cell separator membranes which gives each cell separator membrane a high but known resistance value such that the total resistance of the plurality of separators can be measured across the entire stack when the stack is assembled without the presence of an electrolyte thereby enabling the total cell resistance to be readily tested to verify the integrity of the layers of the stack of the assembled cell.
In an electrochemical cell having a bi-polar layered construction wherein a plurality of commonly connected metal anode layers and a plurality of commonly connected cathode layers are alternately arranged in closely packed, sandwich fashion, each anode and cathode layer being separated by one of a plurality of thin insulating separator membranes to produce a cell stack, the improvement comprising incorporating conductive material in each of the cell separator membranes which gives each cell separator membrane a high but known resistance value such that the total resistance of the plurality of separators can be measured across the entire stack when the stack is assembled without the presence of an electrolyte thereby enabling the total cell resistance to be readily tested to verify the integrity of the layers of the stack of the assembled cell and wherein the conductive material incorporated is conductive fibers.
In an electrochemical cell having a bi-polar layered construction wherein a plurality of commonly connected metal anode layers and a plurality of commonly connected cathode layers are alternately arranged in closely packed, sandwich fashion, each anode and cathode layer being separated by one of a plurality of thin insulating separator membranes to produce a cell stack, the improvement comprising incorporating conductive material in each of the cell separator membranes which gives each cell separator membrane a high but known resistance value such that the total resistance of the plurality of separators can be measured across the entire stack when the stack is assembled without the presence of an electrolyte thereby enabling the total cell resistance to be readily tested to verify the integrity of the layers of the stack of the assembled cell and wherein the conductive material incorporated is carbon fibers.
Dependencies are inferred from the claim text.