Patent ID: 9711808
Date: 2017-07-18
CPC Classifications: H01M,Y02E,Y02T

Claim:
1. A method for optimizing execution of heating tasks in a fuel cell vehicle, the method comprising the steps of: providing a stack coolant loop including a fuel cell stack comprising a fuel cell stack outlet, a primary pump, and a radiator module comprising a radiator module inlet; providing a bypass coolant loop in fluid communication with said stack coolant loop, said bypass coolant loop including a coolant heater, a secondary pump, and a bypass coolant loop inlet and a bypass coolant loop outlet, wherein said bypass coolant loop does not include a shut off valve; connecting said bypass coolant loop inlet to a portion of said stack coolant loop downstream of the fuel cell stack outlet and upstream of said radiator module inlet with respect to a flow of a coolant, and connecting said bypass coolant between said bypass coolant loop inlet and said radiator module inlet; and splitting said flow of said coolant between said stack coolant loop and said bypass coolant loop; thereby heating a passenger cabin with fuel cell stack offheat and reducing a load on the coolant heater while directing a full flow of the coolant to the radiator module without a bypass coolant loop shutoff valve.