Patent ID: 11919419
Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC B  H  Y | IPC B  H

Claim 10:
11. A method to manage thermal propagation in an energy storage device of a battery electric vehicle, the method comprising:
operating the battery electric vehicle with a plurality of distinct battery cell module groups each separately providing electrical power to the battery electric vehicle;
operating the battery electric vehicle with a vehicle propulsion system operable to convert power from the plurality of distinct battery cell module groups to provide motive power for the battery electric vehicle; and
within a computerized battery cell module groups controller,
monitoring conditions within the plurality of distinct battery cell module groups;
determining occurrence of an abnormal event within one of the plurality of distinct battery cell module groups based upon the monitored conditions, wherein the determining occurrence of the abnormal event includes determining occurrence of one of an open circuit condition, an overtemperature condition, and a thermal event within the one of the plurality of distinct battery cell module groups;
controlling operation of the battery electric vehicle based upon the determined occurrence of the abnormal event, wherein controlling the operation of the battery electric vehicle includes operating a chiller module in cooling mode to transfer heat away from the plurality of distinct battery cell module groups; and
controlling operation of the battery electric vehicle by operating the chiller module in reverse mode to provide heat to the plurality of distinct battery cell module groups during a cold start of the battery electric vehicle when the abnormal event is not occurring, the vehicle propulsion system is not providing motive power for the battery electric vehicle, and the battery electric vehicle is stationary.