For various reasons, it can be desirable to subject fuel cells to drying
procedures. In solid polymer electrolyte fuel cells for instance, drying
may be carried out prior to storing at below freezing temperatures, or to
recover cell performance lost following freeze/thaw events. An improved
drying method involves drying the cell uniformly throughout. That is, the
drying power over the length of the fuel cell is adjusted to be
essentially uniform. This can be accomplished by using an appropriate set
of operating conditions. The improved drying method can improve the
lifetime of the fuel cell.