US 11,705,591 B2
Traction battery pack thermal event detection
Hesam Zomorodi Moghadam, Ypsilanti, MI (US); Navid Rahbariasr, Inkster, MI (US); Xu Wang, Northville, MI (US); Graham Lynn Briggs, Detroit, MI (US); Jeffery R. Grimes, Canton, MI (US); Michael George Schamber, Milford, MI (US); and Wai Hwa Fong, Canton, MI (US)
Assigned to Ford Global Technologies, LLC, Dearborn, MI (US)
Filed by Ford Global Technologies, LLC, Dearborn, MI (US)
Filed on Sep. 9, 2020, as Appl. No. 17/15,407.
Prior Publication US 2022/0077517 A1, Mar. 10, 2022
Int. Cl. H01M 10/48 (2006.01); H01M 10/42 (2006.01); B60L 3/00 (2019.01); G01R 31/3835 (2019.01); B60L 58/25 (2019.01)
CPC H01M 10/486 (2013.01) [B60L 3/0046 (2013.01); B60L 58/25 (2019.02); G01R 31/3835 (2019.01); H01M 10/425 (2013.01); B60L 2240/545 (2013.01); B60L 2240/547 (2013.01); B60L 2240/549 (2013.01); H01M 2220/20 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A method of detecting a thermal event associated with a battery assembly of an electrified vehicle, comprising:
obtaining a temperature reading from a sensor associated with an area of the battery assembly;
assessing whether the sensor is flagged with a first identifier or a second identifier, the first identifier indicating that the temperature reading is reliable, the second identifier indicating that the temperature reading is unreliable; and
if the sensor is flagged with the first identifier, detecting a thermal event associated with the battery assembly based on the temperature reading from the sensor,
wherein the temperature reading is a current temperature reading, and further comprising flagging the sensor with the second identifier based on the current temperature reading during a current drive cycle, and based further on a past temperature reading from the sensor during a preceding drive cycle.