Improved battery cell temperature estimation with battery cell impedance estimation and module temperature sensor measurements

The invention relates to improved battery cell temperature estimation with battery cell impedance estimation and module temperature sensor measurements. A monitoring system for a battery system includes a battery system including a battery pack. The battery pack includes M battery modules, where M is an integer greater than zero. Each of the M battery modules includes C battery cells, where C is an integer greater than 1. The T temperature sensors are configured to generate sensed temperatures of the M battery modules, wherein T is greater than or equal to M and less than M multiplied by C. A battery management module configured to perform battery impedance measurements on C battery cells of the M battery modules; generating an estimated temperature for each of the C battery cells of the M battery modules based on the battery impedance measurements; and selectively detecting at least one of the C battery cells having the cell abnormal temperature based on the estimated temperatures of the C battery cells. 本发明