Patent ID: 8003270
Filing Date: 2011-08-23
Classification: B60L,H01M,Y02E,Y02T

Abstract:
1. A method for regulating the temperature of a fuel cell stack, the method comprising: pumping a stream of liquid heat exchange fluid from a liquid reservoir into thermal communication with the fuel cell stack; withdrawing a recycle stream of the liquid heat exchange fluid from the fuel cell stack; and thermostatically apportioning the recycle stream between a stream that is returned to the liquid reservoir and a bypass stream that is returned into thermal communication with the fuel cell stack without first being returned to the liquid reservoir, wherein the apportioning is responsive directly, to the temperature of the recycle stream withdrawn from the fuel cell stack, and further wherein the apportioning is not directly responsive to a temperature of the liquid heat exchange fluid that is pumped from the liquid reservoir into thermal communication with the fuel cell stack.