A method for estimating the state of health of an electric or hybrid vehicle battery that can be carried out while the vehicle is running includes: (a) a full charge step; (b) a first relaxation step; (c) a step of discharging to a state of charge SOC≤SOCtarget carried out in k vehicle driving cycles, for each of which the capacity Qn discharged by the battery is determined; (d) a second relaxation step at the end of the cycle k; (e) a step of determining a state of charge SOCOCV as a function of the open circuit voltage; (f) a step of determining an initial discharge capacity Qi of the new battery from SOCOCV; and (g) a step of estimating the state of health SOH of the battery from the total capacity discharged by the battery during step (c) and from Qi.
METHOD FOR ESTIMATING THE STATE OF HEALTH OF AN ELECTRIC OR HYBRID VEHICLE BATTERY
2025-05-08
Patent
Electronic Resource
English
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