Electrochemical state and internal variables estimation using a reduced-order physics-based model of a lithium-ion cell and an extended Kalman filter

Journal Article · Sun Mar 15 00:00:00 EDT 2015 · Journal of Power Sources

DOI:https://doi.org/10.1016/j.jpowsour.2014.11.135· OSTI ID:1211076

Stetzel, KD; Aldrich, LL; Trimboli, MS; Plett, GL

This paper addresses the problem of estimating the present value of electrochemical internal variables in a lithium-ion cell in real time, using readily available measurements of cell voltage, current, and temperature. The variables that can be estimated include any desired set of reaction flux and solid and electrolyte potentials and concentrations at any set of one-dimensional spatial locations, in addition to more standard quantities such as state of charge. The method uses an extended Kalman filter along with a one-dimensional physics-based reduced-order model of cell dynamics. Simulations show excellent and robust predictions having dependable error bounds for most internal variables. (C) 2014 Elsevier B.V. All rights reserved.

• Sponsoring Organization: USDOE Advanced Research Projects Agency - Energy (ARPA-E)
• DOE Contract Number: DE-AR0000271
• OSTI ID: 1211076
• Journal Information: Journal of Power Sources, Vol. 278; ISSN 0378-7753
• Country of Publication: United States
• Language: English