Fuel cell and method for its manufacture
A method for making a component of a fuel cell utilizes a rotary die forming station for shaping a web of material into a configuration corresponding to the component. The component may comprise an exchanger plate. Also disclosed is a method for fabricating a fuel cell assembly wherein a gasket is affixed between portions of two exchanger plates, and the affixation may be accomplished by rotary die forming. Also disclosed are fuel cells and fuel cell assemblies made by these methods.
1 . A method for making a component of a fuel cell, said method comprising the steps of:
providing a web of a material;
providing a rotary die forming station configured to shape said web of material into a configuration corresponding to said component; and
feeding said web through said station;
whereby said station configures said web into a shape corresponding to said component.
2 . The method of claim 1 , wherein said web comprises a web of a metallic material.
3 . The method of claim 1 , wherein said component is an exchanger plate.
4 . The method of claim 1 , wherein said rotary die forming station is operable to carry out at least one operation on said web, said operation selected from the group consisting of: scribing, embossing, piercing, crimping, cutting, creasing, folding, stretching and bending.
5 . The method of claim 1 , wherein said rotary die forming station is further operable to apply a coating to said web.
6 . The method of claim 5 , wherein said coating comprises an adhesive coating.
7 . The method of claim 5 , wherein said coating is electrochemically active.
8 . The method of claim 1 , wherein said station is further operable to laminate a material to said web.
9 . The method of claim 8 , wherein said material comprises a gasket material.
10 . The method of claim 8 , wherein said material comprises a membrane.
11 . A fuel cell which includes a component made by the method of claim 1 .
12 . A method of making a fuel cell, said method comprising the steps of:
providing a first exchanger plate;
providing a second exchanger plate;
providing a gasket;
disposing said gasket on a portion of a face of said first plate;
disposing said second plate in a spaced apart, superposed relationship with said first plate so that a face of said second plate contacts said gasket; and
deforming at least one of said plates or said gasket so as to fixedly retain said gasket to at least one of said plates.
13 . The method of claim 12 , including the further step of deforming both of said plates so as to fixedly retain said gasket thereto.
14 . The method of claim 12 , wherein the step of deforming comprises crimping and/or piercing.
15 . The method of claim 12 , including the further step of interposing a fuel cell membrane between at least a portion of the spaced apart regions of said first and second plate.
16 . The method of claim 12 , wherein said step of deforming is implemented by a rotary die forming process.
17 . The method of claim 12 , wherein said step of deforming comprises heating.
18 . A fuel cell including at least one component which is fabricated in a rotary die forming process.