METHOD AND DEVICE FOR PREDICTING STATE OF HEALTH AND REMAINING LIFETIME FOR USED ELECTRIC VEHICLE BATTERIES

A method for predicting a remaining lifetime of a used and unopened electric vehicle battery comprises: performing, by a diagnostic device coupled to the battery, a calibration operation, comprising: varying a current interruption interval provided to the battery during a predetermined interruption time period; measuring an internal resistance associated with the battery during the interruption time period; and setting the current interruption interval based on a determined minimum internal resistance corresponding to the current interruption interval. The method further comprises determining, by the diagnostic device, a state of health of the battery, wherein the state of health is based on the minimum internal resistance; comparing, by the diagnostic device, the determined minimum internal resistance to stored data, wherein the stored data corresponds to one or more deployed second life batteries; predicting, by the diagnostic device, a remaining expected life of the battery based on the comparison of the determined minimum internal resistance to the stored data: and determining, by the diagnostic device, a set of preferred operation parameters for the battery, wherein the determination is based on at least one of the state of health of the battery and the predicted remaining expected life of the battery.