Patent ID: 11967851
Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  B | IPC B  H

Claim 10:
11. An electric powertrain system comprising:
a battery pack having a plurality of battery cells and a cell sense circuit, the cell sense circuit being configured to measure cell sense data for each respective one of the battery cells;
a rotary electric machine that is electrically connected to the battery pack, wherein the battery pack is configured to supply electrical energy to the rotary electric machine in a discharging mode, and to receive electrical energy from the rotary electric machine, an offboard charging station, and/or a solar panel in a charging mode; and
a controller in communication with the cell sense circuit and the rotary electric machine, wherein the controller is configured to:
receive the cell sense data for each respective one of the battery cells from the cell sense circuit, the cell sense data including a cell voltage, a cell current, and a cell temperature;
process the cell sense data, for each respective battery cell of the plurality of battery cells, through multiple battery state functions to thereby generate a plurality of numeric cell degradation values (CDVs), wherein the multiple battery state functions are calibrated relationships of the cell sense data to predetermined battery fault conditions; and
automatically adapt a usage level of the battery pack during operation of the battery pack based on the numeric CDVs; and

wherein the controller is configured to automatically adapt the usage level of the battery pack includes modifying calibrated charging limits, charging rates, and/or thermal limits of the battery pack during a charging cycle of the battery pack using the offboard charging station and/or an onboard solar panel.