Characterization of Electricity Production Cells Using Broadband Impedance Spectroscopy

摘要

According to one embodiment of the present invention, there is provided a method comprising: injecting a broadband signal having a plurality of waveforms superimposed at different frequency set points over a frequency range into an electricity production cell; measuring at least one of a voltage and current response, wherein a response at each frequency set point is obtained simultaneously; calculating an impedance of the electricity producing cell using the broadband signal and the response; and using the impedance to determine a state of the electricity production cell, comprising using the calculated impedance response over the frequency range, wherein the distribution of frequency set points is the frequency setting for the electricity production cell. characterized in that for a predetermined number of frequency set points to optimally tune the point distribution, the low value frequency set points are located closer together and the high value frequency set points are determined using a function that is further apart. A method is provided.