Patent ID: 11874333
Assignee: ELECTRICITE DE FRANCE
Field: Measurement (Instruments)
Classification: CPC G  H  Y | IPC G  H

Claim 5:
6. A method of determining a state of wear of an electrochemical cell, comprising the following operations:
a. connecting terminals of the at least one cell to a test bench comprising a control module and a measurement module;
b. imposing by the control module a strong current level between said terminals and discharging said electrochemical cell at the strong current level, said strong current level being greater than one-third of an electric current enabling total discharge of said electrochemical cell in one hour;
c. measuring by the measurement module a time and an electric current between said terminals to reach a predetermined electric voltage;
d. comparing the results of the measurement to a chart of correlations between a rapid discharge and a slow discharge of an electrochemical cell, said chart being constructed according to the method of claim 1;
e. deducing from the comparison a level of wear of said at least one electrochemical cell under a weak current smaller than or equal to one-third of the electric current enabling total discharge of said electrochemical cell in one hour, said level of wear of said at least one electrochemical cell under a weak current being obtained by applying a corrective factor provided in said chart to a level of wear of said at least one electrochemical cell under said strong current deduced from said results of the measurement.