METHOD FOR THE CONTINUOUS MEASURE OF THE EFFICIENCY OF A BATTERY, ESPECIALLY A BATTERY INSTALLED IN MOTOR VEHICLES, AND A DEVICE UTILIZING THIS METHOD.

摘要

A method for the continuous measurement of the efficiency of a battery, especially a battery installed in motor vehicles, comprising the following phases: —determination of the state of charge SOC % of the battery installed in the vehicle, both during key-off phase and key-on phase, without the direct measurement of current through progressive readings of battery voltage, both in the absence and in the presence of electrical load and considering the time elapsed since the beginning of each discharge phase; —determination of the state of health SOH of the same battery through the application of a controlled current load and the comparison of the resulting voltage drop compared to predetermined parameters; —determination of the state of function SOF of said battery through an estimation of its residual autonomy in function of the discharge rate or current rate and of the evolution of SOC %; —correlation and normalization of the above described parameters (SOC, SOH, and SOF) depending on the battery operating temperature;—memorization of at least the values of initial SOC % and SOH detected during the key—off phase.