摘要:
A fuel cell system including a plurality of fuel cell stacks includes a control unit configured to, when a part of the fuel cell stacks is replaced, set a first output of a replaced fuel cell stack to differ from a second output of another unreplaced fuel cell stack.
摘要:
Disclosed is a system and method for controlling a fuel cell system. More specifically, a fuel cell demand current is calculated based on a driver demand current calculated from a driver demand torque. Then a target flow rate-1 of air to be supplied to a fuel cell stack is calculated based on the fuel cell demand current and a target stoichiometric ratio (SR) of air. The target flow rate-1 is then compensated for using the target SR, an RPM command value of an air blower is calculated based on a compensated target flow rate-2 and the amount of air currently measured. The operation of the air blower is subsequently controlled based on the calculated RPM command value.
摘要:
Problem to be Solved The present invention provides a water content estimation apparatus for a fuel cell and a fuel cell system which are capable of accurately determining a water content in a cell plane. Solution The water content estimation apparatus for a fuel cell includes an estimating unit for estimating a residual water content distribution in a reactant gas flow channel and a moisture content distribution in an electrolyte membrane in a cell plane of a single cell while taking into consideration water transfer that occurs between an anode electrode and a cathode electrode via the electrolyte membrane between the anode electrode and the cathode electrode. The fuel cell system performs control based on an estimation result by the estimating unit so that the fuel cell assumes a predetermined water condition.
摘要:
Die Erfindung betrifft ein Verfahren zur Bestimmung kritischer Betriebszustände an einem Brennstoffzellenstack, bestehend aus in Serie geschalteten Einzelzellen, wobei dem Brennstoffzellenstack ein niederfrequentes Strom- oder Spannungssignal eingeprägt, das sich ergebende Spannungs- oder Stromsignal gemessen und der Klirrfaktor thd bestimmt wird. Erfindungsgemäß wird zur Bestimmung eines mit der Austrocknung der Brennstoffzellenmembranen des Brennstoffzellenstacks korrelierenden Indikators THDA dryout die gewichtete Summe aus einem vom Membranwiderstand R m abhängigen Term und einem vom Klirrfaktor thd abhängigen Term herangezogen, wobei der Membranwiderstand R m durch Impedanzmessung erfasst wird.
摘要:
L'invention porte sur un procédé de détermination d'une distribution spatiale Wc x , y i d'un paramètre d'intérêt (Wc) représentatif d'une activité catalytique d'une couche active d'au moins une électrode d'une cellule électrochimique, comprenant les étapes dans lesquelles on détermine une distribution spatiale Wc x , y i du paramètre d'intérêt (Wc) en fonction de la distribution spatiale Q x , y e d'une seconde grandeur thermique (Q e ) préalablement estimée à partir de la distribution spatiale T x , y c d'une température de consigne (T c ) et de la distribution spatiale D x , y r d'une première grandeur thermique (D r ).