Experimental measurement of the maximum power of the battery

What is the peak power of a battery?

The peak power of a battery is a vital feature for electric vehicles to maximize battery efficiency and ensure the safe operation of the system. Currently, the estimation and prediction of the state-of-power are based either on precise model algorithms or a large amount of test data. However, these methods will lead to conservative measurements.

How to define experiments for battery OED?

Two approaches have been proposed to define experiments for battery OED in literature. (1) Pre-determining sets of experiments with a combination of pulses, sinusoids, and drive cycles and (2) designing an algorithm that can generate many different experiments based on several input variables.

How is the maximum power capability of a Hess estimated?

The identified parameters are then used to estimate the maximum power capability of the HESS. The maximum power capabilities of the battery and SC are estimated for both 1 and 30 s time horizons. The parameter identification algorithm can be applied to systems including either batteries or SCs when the optimal excitation current can be injected.

How many design variables are used in a battery model?

Experiments are defined using only three design variables making our approach computationally efficient. The methodology is demonstrated using the Doyle-Fuller-Newman battery model for eight parameters of a 2.6 Ah 18,650 cell.

What is the optimal parametrization strategy for lithium-ion battery models?

The physics-based lithium-ion battery model used in this work to demonstrate the OED methodology is based on the work of Doyle, Fuller and Newman . However, the proposed optimal parametrization strategy is not limited to this specific model but instead widely applicable for electrochemical battery models and beyond.

What is power sensitivity?

Moreover, the conception of power sensitivity is proposed, which will make the procedure easier to determine the set power during the constant power experiments. The results indicate that the method can assist researchers in achieving a full understanding of the peak power characteristic of batteries.