Abstract: A stack (10) of fuel cells (11) is manufactured with barriers (32) to prevent migration of a liquid electrolyte (such as phosphoric acid) out of the cells (11). The barrier (32) is secured within a step (34) formed within a land region (28) of a separator plate assembly (18) and extends from an edge (30) of the separator plate assembly (18) all or a portion of a distance between the edge (30) and a flow channel (24) defined within the separator plate assembly (18). The barrier (32) also extends away from the edge (30) a distance of between 0.051 and about 2.0 millimeters (about 2 and about 80 mils. The barrier (32) includes a hydrophobic, polymeric film (36), a pressure sensitive adhesive (38) as an assembly aid, and a fluoroelastomer bonding agent (40).
Type:
Grant
Filed:
June 18, 2009
Date of Patent:
January 1, 2019
Assignee:
DOOSAN FUEL CELL AMERICA, INC.
Inventors:
Sridhar V. Kanuri, Richard D. Breault, Kishore Kumar Tenneti, Ned E. Cipollini, Frank E. Kenney, III
Abstract: A stack (10) of fuel cells (11) is provided with barriers (32) to prevent migration of a liquid electrolyte (such as phosphoric acid) out of the cells (11). The barrier (32) is secured within a step (34) defined within a land region (28) of a separator plate assembly (18) and extends from an edge (30) of the separator plate assembly (18) all or a portion of a distance between the edge (30) and a flow channel (24) defined within the separator plate assembly (18). The barrier (32) also extends away from the edge (30) a distance of between 0.051 and 2.0 millimeters (2 and 80 mils). The barrier (32) includes a hydrophobic, polymeric film (36), a pressure sensitive adhesive (38), as an assembly aid, and a fluoroelastomer bonding agent (40).
Type:
Grant
Filed:
June 18, 2009
Date of Patent:
November 7, 2017
Assignee:
DOOSAN FUEL CELL AMERICA, INC.
Inventors:
Sridhar V. Kanuri, Richard D Breault, Kishore Kumar Tenneti, Ned E. Cipollini