US 12,456,877 B2
Battery hazard detection
Hideo Kondo, Oizumi-machi (JP)
Assigned to SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC, Scottsdale, AZ (US)
Filed by SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC, Phoenix, AZ (US)
Filed on Apr. 5, 2022, as Appl. No. 17/658,006.
Prior Publication US 2023/0318333 A1, Oct. 5, 2023
Int. Cl. H02J 7/00 (2006.01); G01K 3/10 (2006.01); G01R 31/388 (2019.01); G01R 31/392 (2019.01)
CPC H02J 7/0048 (2020.01) [G01K 3/10 (2013.01); G01R 31/388 (2019.01); G01R 31/392 (2019.01); H02J 7/00032 (2020.01); H02J 7/005 (2020.01); H02J 7/0063 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method of monitoring a battery within a host device for abnormal conditions, comprising:
at an integrated circuit, receiving a first measurement of a first temperature for a battery at a first state-of-charge (SOC) of the battery during a charge action;
at the integrated circuit, receiving a second measurement of a second temperature for the battery at a second SOC of the battery during the charge action;
at the integrated circuit, determining a current delta-SOC for the charge action; and
at the integrated circuit, accessing a memory in the host device holding delta-SOC temperature data associated with a plurality of delta-SOCs, the delta-SOC temperature data including at least first data associated with a normal battery performance profile and second data associated with an abnormal battery performance profile;
at the integrated circuit, determining whether a battery temperature increase for the charge action at the current delta-SOC is abnormal by comparing the battery temperature increase to the delta-SOC temperature data; and
at the integrated circuit, responsive to determining that the battery temperature increase is abnormal, initiating a safety action to prevent thermal runaway in the battery.