US 12,092,697 B2
System and methods for rechargeable battery analysis, monitoring, and diagnostics
Byunghoo Jung, West Lafayette, IN (US)
Assigned to Purdue Research Foundation, West Lafayette, IN (US)
Filed by Purdue Research Foundation, West Lafayette, IN (US)
Filed on Jul. 18, 2022, as Appl. No. 17/867,360.
Claims priority of provisional application 63/222,991, filed on Jul. 17, 2021.
Prior Publication US 2023/0021402 A1, Jan. 26, 2023
Int. Cl. G01R 31/392 (2019.01); G01R 31/367 (2019.01); G01R 31/382 (2019.01); H01M 10/48 (2006.01)
CPC G01R 31/392 (2019.01) [G01R 31/367 (2019.01); G01R 31/382 (2019.01); H01M 10/48 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method of determining state of health (SoH) of a battery, comprising:
receiving a predetermined open circuit voltage (Voc) vs. a state of charge (SoC) characteristics for a pristine battery, the battery comprising:
an anode electrode assembly, including:
an anode collector;
an anode electrode constituting a plurality of anode electrode slices;
an anode double-layer;
an electrolyte; and
a cathode electrode assembly, including:
a cathode collector;
a cathode constituting a plurality of cathode electrode slices;
a cathode double-layer,
wherein during a charging cycle ionic electrolytic particles within the electrolyte migrate from the cathode assembly to the anode double-layer and via a diffusion process diffuse into the plurality of anode slices, and wherein during a discharge cycle the ionic electrolytic particles within the electrolyte migrate from the anode assembly to the cathode double-layer and via a diffusion process diffuse into the plurality of cathode slices;
establishing a single battery model including physical diffusion characteristics and electrical characteristics based on lumped parameters thereby modeling diffusion resistance and capacitance from associated double-layers to associated slices as well as electrical characteristics based on electrical resistance and capacitance from the anode collector to the cathode collector, thereby generating equations describing voltage at the anode and cathode double-layers;
solving the double-layer equations, thereby generating solutions for anode and cathode double-layer electrical characteristics; and
establishing a relationship between the solved double-layer characteristics and the SoC, thereby determining a SoH of the battery based on said relationship.