IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0719829
(2001-02-23)
|
국제출원번호 |
PCT/CA99/00611
(1999-07-02)
|
국제공개번호 |
WO00/02282
(2000-01-13)
|
발명자
/ 주소 |
- Wilkinson, David P.
- Knights, Shanna D.
- Lauritzen, Michael V.
|
출원인 / 주소 |
- Ballard Power Systems Inc.
|
대리인 / 주소 |
McAndrews, Held & Malloy, Ltd.
|
인용정보 |
피인용 횟수 :
14 인용 특허 :
9 |
초록
▼
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 reduce
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.
대표청구항
▼
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 reduce
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. netic recording medium using the medium substrate and a magnetic disk device. 85, 19900100, Honda et al., 264/045.5; US-4908137, 19900300, Chen et al., 210/679; US-4915839, 19900400, Marinaccio et al., 210/500.23; US-4925572, 19900500, Pall, 210/767; US-4936998, 19900600, Nishimura et al., 210/638; US-4944879, 19900700, Steuck, 210/500.27; US-4946603, 19900800, Laugharn et al., 210/807; US-4950549, 19900800, Rolando et al., 428/500; US-4981591, 19910100, Ostreicher, 210/502.1; US-5004543, 19910400, Pluskal et al., 210/490; US-5039797, 19910800, Clack et al., 528/405; US-5049275, 19910900, Gillberg-LaForce et al., 210/500.27; US-5049282, 19910900, Linder et al., 210/651; US-5059654, 19911000, Hou et al., 525/054.1; US-5085780, 19920200, Ostreicher, 210/683;
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