CPC H01M 10/482 (2013.01) [B60L 58/26 (2019.02); H01M 10/425 (2013.01); H01M 10/486 (2013.01); H01M 2010/4278 (2013.01)] | 20 Claims |
17. A system for detecting thermal runaway of a cell, comprising:
a controller having at least one computer, with the at least one computer individually having:
at least one processor; and
at least one memory storing instructions, such that the at least one processor is programmed to:
confirm an automobile vehicle stop;
measure a cell voltage of multiple cells of a battery pack of the automobile vehicle at a predetermined sample rate;
identify a cell short by a cell voltage decrease and a start of cell voltage modulation;
identify if a power spectrum exceeds a predetermined threshold following initiation of the cell short;
indicate, a battery cell thermal runaway event in response to a cell threshold temperature being reached;
initiate an alarm after the threshold temperature is reached;
calculating a derivative of the cell voltage of individual ones of the multiple cells calculated with respect to time;
calculating a fast fourier transform power spectrum calculated applying the derivative of the cell voltage of the multiple cells with respect to time;
calculating a released energy calculated by applying the power spectrum; and
initiating the alarm when the power spectrum exceeds a predetermined threshold following initiation of the cell short; and
initiate an action following the initiation of the alarm including at least one of:
release a battery pack pressure;
communicate a warning via a smart phone to a vehicle operator; and
contact an emergency service.
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