US 9,812,721 B2
Dual seal anode drain / purge tube
Anthony G. Chinnici, Utica, MI (US); Bruce J. Clingerman, North Rose, NY (US); and Chad A. Dammar, Ferndale, MI (US)
Assigned to GM Global Technology Operations LLC, Detroit, MI (US)
Filed by GM Global Technology Operations LLC, Detroit, MI (US)
Filed on Jun. 11, 2015, as Appl. No. 14/736,890.
Prior Publication US 2016/0365588 A1, Dec. 15, 2016
Int. Cl. H01M 8/04223 (2016.01); H01M 8/04225 (2016.01); H01M 8/04089 (2016.01); H01M 8/04302 (2016.01)
CPC H01M 8/04268 (2013.01) [H01M 8/04089 (2013.01); H01M 8/04225 (2016.02); H01M 8/04231 (2013.01); H01M 8/04302 (2016.02); H01M 2250/20 (2013.01); Y02T 90/32 (2013.01)] 20 Claims
OG exemplary drawing
 
11. A system for improving cathode catalytic heating by allowing independently for a draining of at least one liquid comprising water and a purging of at least one gas in a fuel cell at cold starts comprising:
an anode drain and a cathode drain coupled by a purge tube there between, the purge tube configured to purge at least one gas from the anode drain to the cathode drain;
a sump external to the purge tube, the sump configured to drain the at least one liquid from the sump to the cathode drain; and
a pintle selectively disposed within the purge tube, the pintle moveable between a closed position, a first open position, and a second open position, the closed position configured to inhibit draining of the at least one liquid from the sump and inhibit purging of the at least one gas from the purge tube, the first open position configured to allow draining of the at least one liquid from the sump and inhibit purging of the at least one gas from the purge tube, the second open position configured to allow draining of the at least one liquid from the sump and allow purging of the at least one gas from the purge tube.