Global Patent Index - EP 1099268 A1

EP 1099268 A1 2001-05-16 - SENSOR CELL FOR AN ELECTROCHEMICAL FUEL CELL STACK

Title (en)

SENSOR CELL FOR AN ELECTROCHEMICAL FUEL CELL STACK

Title (de)

SENSORZELLE FÜR ELEKTROCHEMISCHE BRENNSTOFFZELLENSTAPEL

Title (fr)

ELEMENT DETECTEUR DE PILE A COMBUSTIBLE

Publication

EP 1099268 A1 (EN)

Application

EP 99927631 A

Priority

  • CA 9900611 W
  • US 9153198 P

Abstract (en)

[origin: WO0002282A1] An electrochemical fuel cell stack includes a plurality of fuel cells. At least one of the fuel cells is a sensor cell. The sensor cell has at least one structural dissimilarity with respect to the remaining fuel cells of the plurality. The structural dissimilarity may include, for example, a reduced sensor cell electrochemically active area, reduced electrocatalyst loading, modified anode or cathode flow field, different electrocatalyst composition, or a modified coolant flow field configuration. The sensor cell operates under substantially the same conditions as the remaining cells in the stack. However, in response to a change in a particular stack operating condition, an electrical or thermal response, preferably a voltage change, is induced in the sensor cell which is not simultaneously induced in the remaining fuel cells. Thus, the sensor cell can detect undesirable conditions and its response can be used to initiate corrective action. More than one sensor cell, specific to different types of conditions, may be employed in the stack. In the absence of undesirable conditions, the sensor cell can function as a power-producing fuel cell.

IPC 1-7 (main, further and additional classification)

H01M 8/04; G01R 31/36

IPC 8 full level (invention and additional information)

H01M 8/10 (2006.01); H01M 8/04 (2006.01)

CPC (invention and additional information)

H01M 8/04365 (2013.01); H01M 8/04537 (2013.01); H01M 8/04552 (2013.01); H01M 8/04679 (2013.01); H01M 8/0668 (2013.01); H01M 8/2465 (2013.01); H01M 2300/0082 (2013.01)

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

EPO simple patent family

WO 0002282 A1 20000113; AU 4494699 A 20000124; AU 752755 B2 20020926; CA 2336126 A1 20000113; CA 2336126 C 20070123; EP 1099268 A1 20010516; JP 2002520778 A 20020709

INPADOC legal status


2007-10-24 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20070503

2006-11-22 [RAP1] TRANSFER OF RIGHTS OF AN EP PUBLISHED APPLICATION

- Owner name: BALLARD POWER SYSTEMS INC.

2005-03-16 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20050127

2001-05-16 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20010116

2001-05-16 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE