US 12,416,680 B2
Method for determining a probe signal, method for checking for and detecting a fault in an electrochemical system employing such a signal
Nicolas Guillet, Grenoble (FR); and Vincent Gau, Grenoble (FR)
Assigned to COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES, Paris (FR)
Appl. No. 17/783,234
Filed by COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES, Paris (FR)
PCT Filed Dec. 7, 2020, PCT No. PCT/EP2020/084816
§ 371(c)(1), (2) Date Jun. 7, 2022,
PCT Pub. No. WO2021/115992, PCT Pub. Date Jun. 17, 2021.
Claims priority of application No. 1913931 (FR), filed on Dec. 9, 2019.
Prior Publication US 2023/0014891 A1, Jan. 19, 2023
Int. Cl. G01R 31/392 (2019.01); G01R 31/382 (2019.01)
CPC G01R 31/392 (2019.01) [G01R 31/382 (2019.01)] 12 Claims
OG exemplary drawing
 
1. A method for detecting a fault of an electrochemical system, said method comprising:
at a first instant:
transmitting a first signal, which is a calibration signal, comprising a wave train of multiple frequencies, a spectral density associated with each frequency being identical, in such a way as to induce a response of the electrochemical system;
receiving the response of the electrochemical system to the calibration signal;
determining, on the basis of the received response and for each frequency of the calibration signal, a signal attenuation factor;
determining, for each attenuation factor, a correction factor according to said attenuation factor so as to associate a correction factor with each frequency of the calibration signal;
determining a probe signal, said probe signal being obtained by multiplying the spectral density associated with each frequency of the calibration signal by the correction factor corresponding to the frequency;
transmitting the probe signal determined hereinabove to the electrochemical system;
receiving a response of the electrochemical system to said probe signal; and
analysing the response to the probe signal in such a way as to detect a fault of the electrochemical system; and
at a second instant:
determining a new probe signal by implementing again transmitting the calibration signal, receiving of a response of the electrochemical system to the calibration signal, determining for each frequency of the calibration signal a signal attenuation factor, determining for each attenuation factor a correction factor, and determining the probe signal, the correction factors being memorised; and
analysing a change in the correction factors in such a way as to detect a fault or an indicator of ageing of the electrochemical system, based on a difference between the correction factors determined at the first instant and the correction factors determined at the second instant.