Intelligent motor vehicles and control logic for managing charging of traction battery packs

An electric-drive vehicle comprising:

• a vehicle body with multiple road wheels rotatably attached to the vehicle body;
• an electric traction motor attached to the vehicle body and operable to drive one or more of the road wheels to thereby propel the electric-drive vehicle;
• a rechargeable traction battery pack attached to the vehicle body and operable to power the electric traction motor;
• and
• a vehicle controller programmed to:
• receive battery data from a battery sensing device indicative of a battery state of charge (SOC) and a battery temperature of the traction battery pack;
• determine a rolling evaluation window that varies with a battery age range and/or a date range;
• determine an actual level of degradation of the traction battery pack;
• compare the actual level of degradation with an estimated level of degradation of the traction battery pack at a current date and/or a current age of the traction battery pack;
• determine a magnitude of discrepancy between the actual level of degradation and the estimated level of degradation;
• adjust the battery age range and/or date range of the rolling evaluation window responsive to the actual level of degradation differing from the estimated level of degradation by at least a predefined differential buffer, a size of the adjustment of the battery age range and/or date range being dependent upon the magnitude of discrepancy;
• determine, within the rolling evaluation window using the received battery data, a number of low SOC excursions at which the battery SOC is below a predefined low SOC threshold and a number of high SOC excursions at which the battery SOC is above a predefined high SOC threshold;
• determine if the number of low SOC excursions exceeds a predefined maximum allowable low excursions and if the number of high SOC excursions exceeds a predefined maximum allowable high excursions;
• and
• responsive to the number of low SOC excursions exceeding the predefined maximum allowable low excursions and/or the number of high SOC excursions exceeding the predefined maximum allowable high excursions, transmit a command signal to a resident vehicle subsystem to execute a control operation predetermined to mitigate degradation of the traction battery pack.