Cooling system for fuel cell

A cooling system for a fuel cell comprising:

• a heat exchanger which cools coolant discharged from the fuel cell;
• a heat regulator which adjusts a temperature of coolant to be supplied to the fuel cell after mixing together coolant that has been cooled by the heat exchanger and coolant that has bypassed the heat exchanger;
• an ion exchanger which removes ions from coolant with the use of an ion exchange resin;
• a first valve disposed between an inlet to the ion exchanger and a downstream side of the heat regulator;
• a second valve disposed between the inlet to the ion exchanger and an upstream side of the heat exchanger;
• a supply control means which controls the first and second valves to control a supply of coolant to the ion exchanger, wherein the supply control means opens the first valve and closes the second valve when the temperature of coolant downstream of the heat regulator exceeds a predetetermined range, and wherein the supply control means closes the first valve and opens the second valve when the temperature of coolant downstream of the heat regulator is within the predetermined range.

A cooling system for a fuel cell which discharges coolant through a discharge line and is supplied coolant through a supply line comprising:

• a heat exchanger for cooling a first portion of the coolant from the discharge line;
• a heat regulator for adjusting a temperature of the coolant in the supply line by mixing together the first portion of the coolant from the discharge line that has been cooled by the heat exchanger and a second portion of coolant from the discharge line that has bypassed the heat exchanger;
• an ion exchanger for removing ions from coolant with the use of an ion exchange resin;
• and
• a supply control means for controlling flow to the ion exchanger, wherein the supply control means supplies the ion exchanger with a mixture of the first portion of coolant and the second portion of coolant from downstream of the heat regulator when the heat regulator operates beyond a coolant temperature adjustable range, and wherein the supply control means supplies the ion exchanger with a fraction of the first portion of coolant that has been cooled by the heat exchanger from upstream of the heat regulator when the heat regulator operates within the coolant temperature adjustable range.