Patent ID: 7846590
Filing Date: 2010-12-07
Classification: H01M,Y02E

Abstract:
1. A fuel cell system, comprising: a fuel cell stack having a cathode inlet and a cathode outlet; a water vapor transfer device having a wet-inlet port and a dry-outlet port, the wet-inlet port in fluid communication with the cathode outlet, the dry-outlet port in fluid communication with the cathode inlet; a valve having an upstream inlet and a downstream outlet, the upstream inlet in fluid communication with, and interposed between, the cathode outlet and the wet-inlet port, the valve configured to selectively shunt a fluid leaving the fuel cell stack via the cathode outlet from entering the wet-inlet port; and a controller configured to — receive a target value for an operational characteristic of a fluid entering the cathode inlet, receive a measured value for a fluid entering the cathode inlet, and manipulate the valve in accordance with a model of the valve so that the measured value of the operational characteristic is substantially equal to the target value of the operational characteristic.