Patent ID: 7258263

Claim:
A method for making a current collector plate comprising: providing a first sheet of material having a first bonding face and a first outer face; providing a second sheet of material having a second bonding face and a second outer face; defining a work area on at least one of said first bonding face and said second bonding face; bonding said first and second sheets together at a bonding area which is different from said work area; placing said bonded first and second sheet into a die having a pattern defining at least one flow channel; and injecting fluid between said first and second sheets thereby causing at least one of said first and second sheets to project outward at said work area whereby said work area is expanded outwardly into said die pattern and said bonding area is contacted by said die pattern and precluded from expanding at said bonding area causing a first anode flow channel to be formed on said first outer face, a second self-contained coolant flow channel to be formed between said first and second sheets and a third cathode flow channel to be formed on said second outer face in said work area as defined by said die pattern, wherein said first anode, second self-contained coolant and third cathode flow channels each define a predetermined inlet and outlet.