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Real-time estimation of battery SoC through neural networks trained with model-based datasets: Experimental implementation and performance comparison

Giovanni Chianese, Luigi Iannucci, Ottorino Veneri and Clemente Capasso

Applied Energy, 2025, vol. 389, issue C, No S0306261925005136

Abstract: Data-driven methods have been widely investigated to estimate battery SoC due to their great potential in solving regression problems. However, expensive experimental campaigns are generally required to collect large training datasets. To address this need, this paper demonstrates the advantages of using a validated battery simulation model to easily generate data for training neural networks (NNs) estimating SoC. Such a procedure drastically reduces the number of experiments, which are only required to calibrate/validate a physics-based battery model and to test the NNs in real driving operative conditions. A Li-NMC storage cell for automotive applications was considered as case study to verify the presented methodology. The analysis was performed in a wide range of operative conditions in terms of temperatures and load dynamics. Offline tests, based on data collected during experiments, showed that the trained NNs were able to predict the SoC with an accuracy comparable to NNs trained with standard experimental-based procedures. In the end, the trained NNs were implemented on a microcontroller to prove their real-time applicability in BMS boards.

Date: 2025
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DOI: 10.1016/j.apenergy.2025.125783

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