Simplified parameters estimation forthe dual polarization model of lithium-ion cell

This chapter describes a method for determining the parameters of the “Dual Polarization Model” for lithium-ion battery cell from the result of a standard pulsed discharge test. The chapter introduces a sequence of computations that, starting from the acquired data, step-by-step, gives the parameters of the look-up tables used in the model. The combination of the very common Dual Polarization Model, or two RC network, with this tuning method allows to define a procedure that can be applied to a wide range of lithium-ion cells. The use of a normalized cell model and the application of a search function with predetermined boundary conditions guarantees the certainty of the results, regardless of the cell size and type. The proposed procedure is suitable for future adaptions of the model to cell temperature variation and aging derating. The resulting model is also proposed as the reference model used for the State-of-Health (SOH) estimation.