Start up of cold fuel cell

Details Start up of cold fuel cell Start up of cold fuel cell

1998-10-22

2000-05-30

Bell, Bruce F.

Chemistry: electrical current producing apparatus, product, and

Having magnetic field feature

429 14, 429 17, 429 20, 429 24, 429 26, 429 32, 429 34, 429 38, 429 39, H01M 800

Patent

active

060689412

ABSTRACT:
A proton exchange membrane fuel cell has methanol or ethanol fed into the coolant passages during shut down so as to prevent water trapped therein from freezing in sub-freezing environments. Upon start-up, a controlled amount of air is fed through the cathode reactant flow field so that alcohol diffusing to the cathode catalyst is oxidized, producing heat which will raise the temperature of the fuel cell above freezing, and to a normal operating temperature. A heat exchanger in the coolant water circulating loop may be bypassed during start-up.

REFERENCES:
patent: 5503944 (1996-04-01), Meyer et al.
patent: 5573866 (1996-11-01), Van Dine et al.
patent: 5796186 (1998-08-01), Fletcher et al.

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