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Effective management and just-in-time maintenance of lithium-ion batteriesrequire the knowledge of unmeasured (internal) variables that need to beestimated. Observers are thus designed for this purpose using a mathematicalmodel of the battery internal dynamics. It appears that it is often difficultto tune the observers to obtain good estimation performances both in terms ofconvergence speed and accuracy, while these are essential in practice. In thiscontext, we demonstrate how a recently developed hybrid multi-observer can beused to improve the performance of a given observer designed for anelectrochemical model of a lihium-ion battery. Simulation results, obtainedwith standard parameters values, show the estimation performance improvementusing the proposed method.

State estimation of an electrochemical lithium-ion battery model: improved observer performance by hybrid redesign