Integrally molded gasket for a fuel cell assembly
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United States of America Patent
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Nov 1, 2016
Grant Date -
Mar 21, 2013
app pub date -
Nov 5, 2012
filing date -
Jun 30, 2005
priority date (Note) -
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Abstract
A fuel cell membrane electrode assembly (MEA) comprising first and second gas diffusion layers and an ion exchange membrane disposed between the diffusion layers. Each diffusion layer includes an inner surface facing the membrane, an outer surface opposite the inner surface, and a side surface defining a perimeter of the diffusion layers. An outboard region extends about the diffusion layers at the perimeter. The outboard region surrounds an inboard region. The outboard region has a low density region proximate to the side surface and a high density region between the low density region and the inboard portion. A seal is mounted at the low density region. The high density region prevents portions of the seal from entering the inboard region thereby damaging the MEA. The seal includes a first rim having a smaller radius than a second rim.
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