Chemistry: electrical current producing apparatus – product – and – With pressure equalizing means for liquid immersion operation
Patent
1983-04-11
1985-03-19
Walton, Donald L.
Chemistry: electrical current producing apparatus, product, and
With pressure equalizing means for liquid immersion operation
429210, H01M 824
Patent
active
045059926
ABSTRACT:
A porous gas distribution plate assembly for a fuel cell, such as a bipolar assembly, includes an inner impervious region wherein the bipolar assembly has good surface porosity but no through-plane porosity and wherein electrical conductivity through the impervious region is maintained. A hot-pressing process for forming the bipolar assembly includes placing a layer of thermoplastic sealant material between a pair of porous, electrically conductive plates, applying pressure to the assembly at elevated temperature, and allowing the assembly to cool before removing the pressure whereby the layer of sealant material is melted and diffused into the porous plates to form an impervious bond along a common interface between the plates holding the porous plates together. The distribution of sealant within the pores along the surface of the plates provides an effective barrier at their common interface against through-plane transmission of gas.
REFERENCES:
patent: 3650840 (1972-03-01), Dietz
patent: 4374906 (1983-02-01), Breault et al.
Dettling Charles J.
Terry Peter L.
Engelhard Corporation
Walton Donald L.
LandOfFree
Integral gas seal for fuel cell gas distribution assemblies and does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Integral gas seal for fuel cell gas distribution assemblies and , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Integral gas seal for fuel cell gas distribution assemblies and will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-753247