NOVELTY - Producing bipolar plates (32) involves providing an electrically conductive sheet; and cutting through the sheet to create in it at least one opening for a fluid. The method further involves: finishing the cut sheet by pressing it between two rigid, flat plates; and finishing the cut sheet by pressing it between two parallel rollers, where the rigid, flat plates and the parallel rollers include a nonstick coating. The compressed plates are self-sealed and made from flexible graphite.    USE - For producing bipolar plates used in a stacked fuel cell assembly (claimed) such as for unmanned aerial vehicle (UAV) applications, auxiliary power units (APUs) and small mobile applications such as scooters, and in many other fuel cell applications such as automotive, stationary and portable power.    ADVANTAGE - The optimized bipolar plate has: very good electrical and heat conductivity; gas tightness; corrosion resistance; low weight; and low cost. The bipolar plate ensures good fluid distribution, removes product water, and generates heat. Graphite used for molded bipolar plates achieve a density as low as 1.35 g/cc but requires expensive injection molding equipment and cavity dies. The modular bipolar plate allows for various fuel cell configurations, for example, if more cooling is required for a specific application, a larger air cooling fin can be substituted. Modular bipolar plate also provides ability to preassemble unit cell for easier stack assembly. Modular bipolar plate also allows supplemental cooling channels for liquid cooling to be integrated between unit cell assemblies for other stack designs and the resulting bipolar plate is very thin which reduces overall volume.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following:    (1) producing a fuel cell stack, involving: providing a Membrane Electrode Assembly (MEA) having an anode, a cathode and an electrolyte located between them; locating an oxidant flow field plate against the cathode; locating a fuel flow field plate against the anode; locating a separator plate against the oxidant flow field plate; compressing the plates to produce the fuel cell stack, where the plates are cut through to create several openings in it and finished, where the plates are made from an electrically conductive material; and    (2) a stacked fuel cell assembly, comprising: a Membrane Electrode Assembly (MEA) having a cathode and an anode, and an electrolyte located between them; an oxidant flow field plate having several openings cut through it, where the oxidant flow field plate is located in intimate contact with the cathode so that the openings define several oxidant flow channels and a first several manifolds; a fuel flow field plate having a openings cut through it, where the fuel flow field plate is located in intimate contact with the anode so that the openings define several fuel flow channels and a second several manifolds; and a separator plate located in intimate contact with the oxidant flow field plate, where the separator plate have several openings cut through it.    DESCRIPTION OF DRAWING(S) - The figure shows a cross-sectional view of unit cell assembly.    Fuel cell (10)    Membrane electrode assembly (12)    Anode (14)    Cathode (16)    Solid electrolyte (18)    Oxidant flow field plate (20)    Fuel flow field plate (22)    First oxidant flow channel (24)    Second fuel flow channel (26)    Oxidant channel landing (28)    Fuel channel landing (30)    Bipolar plates (32)