Internal current conduction for a fuel cell stack

A fuel cell stack, comprising:

• a plurality of adjacently stacked fuel cell modules separated by electrically non-conductive bipolar plates;
• and
• a plurality of adjacently aligned fuel cells that are connected in electrical series, each of said fuel cells including:
• an anode diffusion media;
• and
• a cathode diffusion media, wherein current flow between adjacent fuel cells is achieved between said anode diffusion media and said cathode diffusion media of said adjacent fuel cells.

A fuel cell stack having a multi-dimensional reactant flow therethrough, comprising:

• a plurality of adjacently stacked fuel cell modules each of which includes a plurality of adjacently aligned fuel cells that are connected in electrical series, each of said plurality of fuel cell modules including:
• a first reactant carrier plate that includes a first plurality of first reactant channels and a first plurality of second reactant channels;
• intermediate plates;
• and
• a second reactant carrier plate that includes a second plurality of second reactant channels and a second plurality of first reactant channels, said first plurality of first reactant channels in fluid communication with said second plurality of first reactant channels across said intermediate plates and said first plurality of second reactant channels in fluid communication with said second plurality of second reactant channels across said intermediate plates.