Fuel cell cooling tank assembly
One embodiment of the invention includes a cooling tank reservoir with a pressure release valve and a cooling fluid conduit wrapped around the pressure release valve.
1. A product comprising:
a fuel cell coolant tank reservoir having an opening and a pressure release valve constructed and arranged to be in a closed position when the pressure in the tank is less than a first pressure and in an open position when the pressure in the tank is greater than the first pressure, a heat transfer wire connected to the pressure release valve and to a portion of a cooling system to heat the pressure release valve.
2. A product as set forth in claim 1 wherein the heat transfer wire extends into the coolant tank reservoir a distance sufficient for a portion of the wire to be immersed in cooling fluid in the reservoir.
3. A product as set forth in claim 1 wherein the heat transfer wire is connected to a seat of the pressure release valve.
4. A product as set forth in claim 1 further comprising a degassing conduit connected to the pressure release valve and constructed and arranged to allow gas from the cooling tank reservoir to flow through the degassing conduit when the pressure release valve is in the open position.
5. A product as set forth in claim 4 further comprising a fuel cell stack and a cathode side exhaust conduit extending from the fuel cell stack, and wherein the degassing conduit is connected to the cathode side exhaust conduit.
6. A product as set forth in claim 5 further comprising a radiator, a cooling fluid conduit extends from the coolant tank reservoir to the radiator, a first cooling fluid conduit extending from the fuel cell stack to the radiator, and a second cooling fluid conduit extending from the radiator to the fuel cell stack to return coolant fluid to the fuel cell stack.
7. A product as set forth in claim 6 wherein the radiator includes a second pressure release valve constructed and arranged to open when the pressure of the cooling fluid in the radiator reaches a predetermined level and to allow cooling fluid and gases to flow from the radiator to the coolant tank reservoir through the cooling fluid conduit.
8. A product comprising a fuel cell system comprising a fuel cell stack and a cooling system constructed and arranged to cool a fuel cell stack, the cooling system comprising a radiator connected to a cooling tank reservoir, the cooling tank reservoir comprising a pressure release valve, and a heat transfer wire connected to the pressure release valve and another portion of the cooling system to transfer heat from the cooling system to the pressure release valve.