Michael J Cartwright

US Patent:

20220216490, Jul 7, 2022

Filed:

Jan 4, 2021

Appl. No.:

17/140551

Inventors:

- Detroit MI, US
Aaron R. Rogahn - Davisburg MI, US
Michael D. Cartwright - Oxford MI, US
Manish Sinha - Rochester Hills MI, US

Assignee:

GM GLOBAL TECHNOLOGY OPERATIONS LLC - Detroit MI

International Classification:

H01M 8/04228
H01M 8/04225
H01M 8/0432
H01M 8/04492

Abstract:

A system for controlling purge operation of a fuel cell assembly includes a controller and one or more sensors configured to obtain respective sensor data. The fuel cell stack is configured to receive a stack coolant. The controller is configured to execute a first purge mode when at least one of a first enabling condition and a second enabling condition is met. The first purge mode defines a first group of setpoints, including a relatively low cathode stoichiometric ratio. The controller is configured to switch to a second purge mode when the coolant temperature is above a minimum warm-up temperature and a third mode when a relative humidity value of a stack cathode output falls below a threshold humidity. The second purge mode defines a second group of setpoints, including a relatively high cathode stoichiometric ratio.

US Patent:

20150311547, Oct 29, 2015

Filed:

Apr 23, 2014

Appl. No.:

14/260199

Inventors:

- Detroit MI, US
Aaron Rogahn - Davisburg MI, US
Steven D. Burch - Honeoye Falls NY, US
Michael Cartwright - Oxford MI, US

Assignee:

GM GLOBAL TECHNOLOGY OPERATIONS LLC - Detroit MI

International Classification:

H01M 8/04

Abstract:

A system and method for a cathode subsystem in a fuel cell system. The system includes a fuel cell stack, a cathode inlet line that provides cathode air to a fuel cell stack and a cathode exhaust line that exhausts a cathode exhaust gas out of the fuel cell stack. Also included is a backpressure valve in the cathode exhaust line that is located downstream of a drip rail of the cathode exhaust line, where the drip rail includes a protrusion that prevents condensed water from building up near the backpressure valve. The drip rail further includes a sump that collects drips of condensed water from the protrusion of the drip rail. The system also includes a drain below a water vapor transfer unit that includes an orifice that is in a portion of the drain that is within the cathode exhaust line.