Method for monitoring the health status of a battery cell

Abstract

A method (100) for monitoring the SOH (State of Health) of an electrical cell, comprising in particular the steps of: Obtaining (110) a voltage range in which a relationship exists between an average of voltage variations and a capacitance loss of the electrical cell, the relationship being modeled by a function with: Measurement (120) of the constant current applied to the electrical cell and of the temperature of the electrical cell, Measurement (130) of the voltage of the electrical cell, When the measured voltage of the electrical cell is within the voltage range obtained (110), storage (140) of the measured voltage, When the measured current is a constant current of intensity not within the predetermined current intensity range and when a voltage has been stored at a previous time: Calculation (170) of the capacitance loss of the electrical cell using the relationship obtained with the calculated average of the voltage variations,Figure to be published with the abbreviation: Figure 1.