Deriving device for deriving each resistance value of a solid oxide fuel cell single cell

摘要

PROBLEM TO BE SOLVED: To provide a derivation method and a derivation device for deriving each resistance value relating to a solid oxide type fuel cell unit cell, which improve measurement accuracy of a resistance value of an ohmic resistance and each electrode reaction resistance value of a fuel electrode and an oxidant electrode of the solid oxide type fuel cell unit cell.SOLUTION: A derivation device, which derives each resistance value relating to a solid oxide type fuel cell unit cell, includes: an impedance measuring instrument 13 that is connected, through a potential cable and a current cable that are each obtained by twisting a pair of wires, to the solid oxide type fuel cell unit cell held by a holding current collecting device for holding the solid oxide type fuel cell unit cell and extracting a current; and a derivation unit 14a for deriving, from a real component and an imaginary component of an impedance measured by an impedance measuring instrument 13, each electrode reaction resistance value of a fuel electrode and an oxidant electrode and a resistance value of an ohmic resistance of the solid oxide type fuel cell unit cell.