A METHOD AND SYSTEM FOR DETERMINING A REMAINING USEFUL LIFETIME OF A BATTERY

The invention relates to a method for determining a remaining useful lifetime of a propulsion battery (2) of a vehicle (1), the method comprising: constructing (S102) a voltage feature vector (204) from voltage data of a charging event for the battery (2), mapping (S104) the voltage feature vector to a battery state of health model (206) including an aging mode distribution of different battery aging mechanisms to determine state of health parameters (210) and the present aging mode distribution (211) of the battery; predicting (S106) the remaining useful lifetime (RUL) using a physical aging model (212) with the state of health parameters and the present aging mode distribution as inputs to the physical aging model.