Patent ID: 8691453
Filing Date: 2014-04-08
Classification: H01M,Y02E

Abstract:
1. A fuel cell system, comprising: a bypass valve provided in a bypass path for providing a bypass between an air supply side of a fuel cell and an air exhaust side of the fuel cell; an air backpressure valve provided on the air exhaust side of the fuel cell; an air compressor for supplying air to the air supply side of the fuel cell; a bypass failure detector for detecting a failure in the bypass valve and including a pressure sensor for detecting a pressure on an air-discharge side of the air compressor; and a controller programmed to control the air backpressure valve and the air compressor, wherein in response to a detection output from the bypass failure detector that a failure has occurred in the bypass valve during low-efficiency operation, the controller increases the degree of opening of the air backpressure valve to increase an amount of cathode-off gas to be discharged and reduces the revolution speed of the air compressor to reduce air supply.