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A method for predicting the minimum cell voltage from the discrete minimum cell voltage output of a stack health monitoring device and a system for estimating parameters of a fuel cell stack
A method for predicting the minimum cell voltage from the discrete minimum cell voltage output of a stack health monitoring device and a system for estimating parameters of a fuel cell stack
A method for predicting the trend of minimum cell voltage of fuel cells in a fuel cell stack (20), the method comprising: monitoring a fuel cell stack voltage and current density of the fuel cell stack (20); an average cell voltage from the measured stack voltage based on the number of Fuel cells in the stack (20) is determined; monitoring a minimum cell voltage of the cells in the stack (20); determining whether the minimum cell voltage falls below a first predetermined threshold; a first set of artificial data points for a cell voltage close to the first Threshold is generated when the minimum cell voltage falls below the first threshold; it is determined whether the minimum cell voltage falls below a second predetermined threshold, the second predetermined threshold being less than the first predetermined threshold; a second set of artificial Generating data points for a cell voltage near the second threshold when the minimum cell voltage falls below the second threshold; and estimating fuel cell stack parameters based on the average cell voltage, current density, and the first and second sets of artificial data points so as to estimate the minimum cell voltage trend and a polarization curve of the minimum cell voltage of the fuel cells in the stack (20).
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