US Patent 10232731 Battery pack management system with selective battery module heating

A system is provided that selectively heats the battery or battery module with the lowest voltage when the battery pack is at a low charge level, thereby decreasing the internal resistance and mitigating the magnitude of the voltage drop of the affected battery/battery module. As a result, termination of the battery pack's discharge cycle is delayed and the driving range of the vehicle is increased, thereby giving the driver a little more time and driving range to reach a charging station.