Model parameters evaluation for NMC cells

Lithium cells are typically modelled through equivalent electrical networks, whose parameters are tuned in order to closely match measured data. In this way, complicated experimental procedures are often needed, to correctly achieve the actual battery behaviour. After making the tests, simulation models are fitted on experimental data, through some optimization algorithms. Computational costs cannot be negligible, and it can require a lot of time to obtain the parameters. This paper analyses and discusses these two aspects. At first, which kind of tests are needed, and if a reduction about test duration is obtainable. Second, how to correctly perform the identification of parameters, and if some generalization in their formulation can be made. Accuracy of each proposed solution has been detailed ascertained, including test duration and subsequent computational cost.