In recent years, the need for undersea equipment for the utilization of ocean resources has
been increasing. Responding to the advancement of devices and the lengthening of exploration
periods, fuel cells are attracting attention as a power source capable of supplying electric power
over an extended period of time, in contrast to conventional storage batteries, which don't have
high power capacity. For use in undersea equipment, Mitsubishi Heavy Industries, Ltd. (MHI) has
developed a new compact high-efficiency fuel cell system that employs a new structure in its gas
circulation system and new fuel cells. This paper provides an overview of the new fuel cell system
and presents MHI's development efforts.
