Patent ID: 7267898
Filing Date: 2007-09-11
Classification: B01D,H01M,Y02E,Y10T

Abstract:
1. An antifreeze apparatus comprising: a fuel cell stack; a water circulation passage circulating water and antifreeze through the fuel cell stack; an antifreeze release/recovery mechanism functioning to release antifreeze into the water in the water circulation passage upstream of the fuel cell stack and recover and store or collect antifreeze from the water in the water circulation passage downstream of the fuel cell stack; a sensor which detects whether or not the fuel cell stack is operating; and a programmable controller programmed to; control the release/recovery mechanism to release antifreeze into the water in the water circulation passage when the fuel cell stack is not operating; and control the release/recovery mechanism to recover and store or collect antifreeze which has diffused into the water in the water circulation passage when the fuel cell stack is operating.