In the latest publication from the Chair of Automotive Technology, researchers investigated the transfer of Differential Voltage Analysis (DVA) and Incremental Capacity Analysis (ICA) from the cell level to the vehicle level. The goal is to estimate the State of Health (SOH) of the traction battery in electric vehicles. For this purpose, data from a VW ID.3 and a Tesla Model 3 were recorded during a complete low-power AC charging session. From DVA and ICA, features can be extracted that, similar to the cell level, are associated with degradation mechanisms and enable SOH estimation.
Battery pack diagnostics for electric vehicles: Transfer of differential voltage and incremental capacity analysis from cell to vehicle level / Philip Bilfinger, Philipp Rosner, Markus Schreiber, Thomas Kröger, Kareem Abo Gamra, Manuel Ank, Nikolaos Wassiliadis, Brian Dietermann, Markus Lienkamp / Journal of eTransportation, 2024, 100356 – DOI