Global sensitivity analysis of battery equivalent circuit model parameters

Conference item

This paper considers one of the most commonly used equivalent circuit models (ECMs) for lithium-ion batteries and investigates the sensitivity of the model output to changes of model parameters using the Morris method. Experiments are carried out on a lithium-ion cell with nickel manganese cobalt oxide (NMC) electrode and parameters of the model are identified in the state of charge (SOC) range [100%, 10%]. Although all the model parameters do vary with SOC, global sensitivity analysis reveals that the uncertainties of some of the parameters generate very little uncertainty in the voltage output, implying that those parameters can be taken as constants without compromising the accuracy of the model. This is further confirmed by experimental validation.

Authors: Zhao, S; Howey, D

• Publication status: Published
• Peer review status: Peer reviewed
• Publisher: IEEE
• Host title: 2016 IEEE Vehicle Power and Propulsion Conference (VPPC)
• Journal: VPPC 2016: 13th IEEE Vehicle Power and Propulsion Conference
• Publication date: 2016-12-22
• Acceptance date: 2016-07-31
• DOI: 10.1109/VPPC.2016.7791696
• ISBN: 9781509035281
• Keywords: sensitivity analysis; Morris method; equivalent circuit model; Monte Carlo method; battery