Fuel cell

Details Fuel cell Fuel cell

1998-03-09

2000-10-17

Gorgos, Kathryn

Chemistry: electrical current producing apparatus, product, and

With pressure equalizing means for liquid immersion operation

429 32, H01M 214

Patent

active

061328952

ABSTRACT:
A very thin fuel cell (500) is formed by stacking a plurality of membrane electrode assemblies (MEA) (210) and a plurality of double sided distribution plates (220). The distribution plates serve to distribute fuel and oxidant to the MEAs, and they are electrically and thermally conductive and gas impermeable, and have fuel and oxidant distribution channels formed on opposite sides. The oxidant flowing through the oxidant distribution channels also provides thermal management to the fuel cell, eliminating the need for a separate heat exchange system. The MEAs and the distribution plates are arranged in an alternating stack (200) such that the fuel distribution channel side (315) is in intimate and direct contact with the MEA anode (212), and such that the oxidant distribution channel (415) is in intimate and direct contact with the MEA cathode (214). The distribution plate acts as a bipolar plate and also as a heat exchanger.

REFERENCES:
patent: 4950562 (1990-08-01), Yoshida et al.
patent: 5094928 (1992-03-01), Dyer
patent: 5372896 (1994-12-01), Binder et al.
patent: 5486430 (1996-01-01), Gorbell et al.
patent: 5514487 (1996-05-01), Washington et al.
patent: 5683828 (1997-11-01), Spear et al.

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