With the increasing share of distributed renewable energy sources in the electricity
supply, the need for storing excess energy is also growing, as energy production and
consumption are predominantly unaligned. Hydrogen has significant potential as a
possible intermediate energy storage medium. The energy bound in hydrogen can be
converted into electrical energy using fuel cells. In this thesis, we focus on fuel cell
stacks, particularly on a proton exchange membrane fuel cell stack. Such a stack is
part of an experimental system where we conducted measurements to determine the
characteristics of the fuel cell stack. The measurements were carried out using an
electronic load that subjected the stack to a constant electric current. The obtained
characteristics were compared with those predicted by the manufacturer of the fuel cell
stack. In conclusion, we confirmed the match of the characteristics.
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