A fuel cell power system practical for use in a vehicle includes a fuel cell,
a
first hydrogen storage vessel having a first hydrogen absorbing material storing
and releasing hydrogen, a catalytic combustor that heats the first hydrogen storage
vessel so as to release hydrogen in order to supply hydrogen to the fuel cell,
and a second hydrogen storage vessel having a second hydrogen absorbing material
storing and releasing hydrogen and has a hydrogen release temperature that is lower
than that of the first hydrogen absorbing material, the second hydrogen storage
vessel releasing hydrogen as a fuel for the catalytic combustor under heating by
waste heat from the fuel cell. Since the catalytic combustor can generate high
temperature heat, a hydrogen absorbing material having a high hydrogen release
temperature and a high hydrogen storage capacity per unit weight can be used as
the first hydrogen absorbing material.
