US 12,216,169 B2
Battery impedance tracking during charging
Patrick Troy Gray, Cedar Park, TX (US); Gerald Dale Morrison, Redmond, WA (US); Michael Frederick David Olley, Scottsdale, AZ (US); Daniel Keith Van Ostrand, Leander, TX (US); and Richard Stuart Seger, Jr., Belton, TX (US)
Assigned to SIGMASENSE, LLC., Austin, TX (US)
Filed by SIGMASENSE, LLC., Wilmington, DE (US)
Filed on Jan. 8, 2024, as Appl. No. 18/407,325.
Application 18/407,325 is a continuation of application No. 17/954,749, filed on Sep. 28, 2022, granted, now 11,977,120.
Application 17/954,749 is a continuation of application No. 17/462,510, filed on Aug. 31, 2021, granted, now 11,493,559, issued on Nov. 8, 2022.
Application 17/462,510 is a continuation of application No. 16/427,935, filed on May 31, 2019, granted, now 11,131,714, issued on Sep. 28, 2021.
Prior Publication US 2024/0183907 A1, Jun. 6, 2024
Int. Cl. G01R 31/367 (2019.01); G01R 31/371 (2019.01); G01R 31/382 (2019.01); G01R 31/392 (2019.01)
CPC G01R 31/367 (2019.01) [G01R 31/382 (2019.01); G01R 31/371 (2019.01); G01R 31/392 (2019.01)] 20 Claims
OG exemplary drawing
 
1. A battery impedance tracking system comprising:
a drive-sense circuit (DSC) operably coupled to generate a charge signal that includes an AC (alternating current) component based on a reference signal, wherein the charge signal used for both charging of a battery and characterization of the battery during charging of the battery, wherein, when enabled, the DSC configured to:
provide the charge signal to a terminal of the battery via a single line and simultaneously to sense the charge signal via the single line such that the charge signal provided via the single line facilitates both the charging of the battery and the characterization of the battery during the charging of the battery, wherein sensing of the charge signal includes detection of impedance of the battery including change of the impedance of the battery that is based on a response of the battery to the charge signal; and
generate a digital signal representative of the impedance of the battery including the change of impedance of the battery that is based on the response of the battery to the charge signal:
memory that stores operational instructions; and
one or more processing modules operably coupled to the DSC and the memory, wherein, when enabled, the one or more processing modules is configured to execute the operational instructions to track the impedance of the battery including the change of impedance of the battery that is based on the response of the battery to the charge signal during the charging of the battery.