A hydration system includes fuel cell fluid flow plate(s) and injection port(s). Each plate has flow channel(s) with respective inlet(s) for receiving respective portion(s) of a given stream of reactant fluid for a fuel cell. Each injection port injects a portion of liquid water directly into its respective...http://www.google.es/patents/US6528198?utm_source=gb-gplus-sharePatente US6528198 - Fuel cell membrane hydration and fluid metering
