Patent ID: 9018961
Filing Date: 2015-04-28
Classification: G01R,H01M,Y02E

Abstract:
1. A method for determining whether an injector that injects hydrogen gas into an anode side of a fuel cell stack is operating properly, said method comprising: monitoring a voltage of the fuel cell stack using a voltage monitoring device; performing spectral analysis of the stack voltage to identify amplitude peaks in the stack voltage; identifying where a spectral analysis amplitude peak should occur if the injector is operating properly; determining whether the spectral analysis has identified a spectral analysis amplitude peak at the location where the spectral analysis amplitude peak should occur; determining that the injector is not operating properly if the spectral analysis does not identify a spectral analysis amplitude peak at the location where the spectral analysis amplitude peak should occur; determining that the spectral analysis has identified a spectral analysis amplitude peak at the location where the spectral analysis amplitude peak should occur; determining whether the identified spectral analysis peak at the location where a spectral analysis amplitude peak should occur if the injector is operating properly has an amplitude within a predetermined threshold of an amplitude of the spectral analysis amplitude peak if the injector is operating properly; and determining that the injector may not be operating properly if the amplitude of the spectral analysis amplitude peak is not within the threshold.