continued from part 2 - Controller General of Patents, Designs, and ...

(12) PATENT APPLICATION PUBLICATION (21) Application No.1738/KOL/2008 A
(19) INDIA
(22) Date of filing of Application :15/10/2008 (43) Publication Date : 05/06/2009
(54) Title of the invention : METHOD FOR IMPROVING FCS RELIABILITY AFTER END CELL HEATER FAILURE
(51) International classification
:H01M8/00;
H01M8/04;
B60L11/18;
H01M8/10;
(31) Priority Document No :11/925,422
(32) Priority Date :26/10/2007
(71)Name of Applicant :
1)GM GLOBAL TECHNOLOGY OPERATIONS, INC.
Address of Applicant :300 GM RENAISSANCE CENTER
DETROIT, MICHIGAN U.S.A.
(72)Name of Inventor :
1)DEREK R. LEBZELTER
2)WILLIAM S. MARLEY
3)JOHN P. SALVADOR
4)ABDULLAH B. ALP
5)LOREN DEVRIES
(33) Name of priority country :U.S.A.
(86) International Application No
:NA
Filing Date
:NA
(87) International Publication No : NA
(61) Patent of Addition to Application Number :NA
Filing Date
:NA
(62) Divisional to Application Number
:NA
Filing Date
:NA
(57) Abstract :
A method for improving fuel cell system reliability in the event of end cell heater failure in a fuel cell stack. The method includes
detecting that an end cell heater has failed. If an end cell heater failure is detected, then he method performs one or more of setting a
cooling fluid pump to a predetermined speed that drives a cooling fluid through cooling fluid flow channels in the fuel cell stack,
limiting the output power of the fuel cell stack or the net power of one fuel cell system, limiting the maximum temperature of the
cooling fluid flowing out of the stack, turning off stack anti-flooding algorithms that may be used to remove water from reactant gas
flow channels in the stack, and turning of cathode stoichiometry adjustments for relative humidity control in response to water
accumulating in cathode flow channels in the fuel cell stack.
No. of Pages : 16 No. of Claims : 22
The Patent Office Journal 05/06/2009 26313