Method for determining the service life of an electrochemical cell of a battery in real time

A method for real-time determination of a service life of an electrochemical cell of a primary battery as a function of a determined application, the method comprising:

• measuring, from the electrochemical cell in the determined application, at least one current value (I), supplied by the electrochemical cell, and at least one temperature value (T);
• and
• determining the service life by calculating an availability time, of the electrochemical cell and starting from a determined initial time, based on the at least one current value (I) and the at least one temperature value (T), as measured from the electrochemical cell in the determined application, and further based on a capacity (C) of the electrochemical cell, a cut-off voltage (Vc) for the determined application, a background current (If) for the determined application, and by determining C×Kp×R/(Imoy+Iad), wherein
• Kp is a cutoff coefficient (Kp) of the electrochemical cell and is a function of both a maximum current value (Imax), drawn by the determined application, and the cut-off voltage (Vc) for the determined application,
• Imoy is an average current (Imoy) drawn by the determined application, is obtained from the at least one current value (I), and includes the background current (If) for the determined application,
• R is a performance (R) in terms of capacity of the electrochemical cell and is a function of both a temperature, of the electrochemical cell in the determined application, and any of the average current (Imoy) and the maximum current value (Imax) drawn by the determined application, and
• Iad is a self-discharge current (Iad) of the electrochemical cell and is a function of both the average current (Imoy), drawn by the determined application, and the temperature of the electrochemical cell in the determined application.