US 12,442,864 B2
Force based abnormality detection in battery pack modules
Jeremie Dernotte, Rochester, MI (US); Arun S. Solomon, Rochester Hills, MI (US); Scott E. Parrish, Farmington Hills, MI (US); and Wei Zeng, Oakland Township, MI (US)
Assigned to GM GLOBAL TECHNOLOGY OPERATIONS LLC, Detroit, MI (US)
Filed by GM GLOBAL TECHNOLOGY OPERATIONS LLC, Detroit, MI (US)
Filed on Aug. 3, 2022, as Appl. No. 17/879,842.
Prior Publication US 2024/0044992 A1, Feb. 8, 2024
Int. Cl. G01R 31/392 (2019.01); G01R 31/36 (2020.01); G01R 31/387 (2019.01); H01M 10/48 (2006.01)
CPC G01R 31/392 (2019.01) [G01R 31/3646 (2019.01); G01R 31/387 (2019.01); H01M 10/482 (2013.01); H01M 10/486 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A system comprising:
a battery pack module configured to be implemented in a battery pack, the battery pack module comprising
a plurality of cells, and
one or more force sensors configured to generate at least one force signal indicative of force on the plurality of cells within the battery pack module; and
a control module configured to
receive the at least one force signal,
based on the at least one force signal, detect a state of the plurality of cells,
based on the detected state of the plurality of cells, at least one of i) modify the state of the plurality of cells, ii) perform targeted cooling of the battery pack module, iii) perform electrical isolation of the battery pack module, and iv) flood the battery pack module with coolant,
perform a first operation to determine at least one of i) whether measured force indicated by the at least one force signal is greater than a first threshold, and ii) whether a change in the measured force is greater than a second threshold,
based on a result of the first operation, perform a first mitigation strategy and operations to prevent a thermal runaway event,
subsequent to performing the first mitigation strategy and operations, perform a second operation to determine at least one of i) whether the measured force is greater than a third threshold, and ii) whether the change in the measured force is greater than a fourth threshold, wherein the third threshold is greater than the first threshold, and wherein the fourth threshold is greater than the second threshold, and
based on a result of the second operation, evaluate other parameters to detect a thermal runaway event.