Lithium-Ion Battery Health Management and State of Charge (SOC) Estimation Using Adaptive Modelling Techniques

Houda Bouchareb (), Khadija Saqli, Nacer Kouider M’sirdi and Mohammed Oudghiri Bentaie
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Houda Bouchareb: LISA Laboratory, Faculty of Science and Technology, Sidi Mohamed Ben Abdellah University, Fez 30000, Morocco
Khadija Saqli: LISA Laboratory, Faculty of Science and Technology, Sidi Mohamed Ben Abdellah University, Fez 30000, Morocco
Nacer Kouider M’sirdi: LIS-SASV and HyRES Lab, Aix Marseille University, 13399 Marseille, France
Mohammed Oudghiri Bentaie: LISA Laboratory, Faculty of Science and Technology, Sidi Mohamed Ben Abdellah University, Fez 30000, Morocco

Energies, 2024, vol. 17, issue 22, 1-27

Abstract: Effective health management and accurate state of charge (SOC) estimation are crucial for the safety and longevity of lithium-ion batteries (LIBs), particularly in electric vehicles. This paper presents a health management system (HMS) that continuously monitors a 4s2p LIB pack’s parameters—current, voltage, and temperature—to mitigate risks such as overcurrent and thermal runaway while ensuring balanced charge distribution between cells. An improved online battery model (IOBM) is developed to enhance SOC estimation accuracy. The system utilises forgetting factor recursive least squares (FFRLS) for real-time parameter updates, an adaptive nonlinear sliding mode observer (ANSMO) for SOC estimation, and a long short-term memory (LSTM) network to dynamically adjust capacity based on operating conditions. Validation using the urban dynamometer driving schedule (UDDS) test demonstrated high accuracy, with the proposed battery model achieving a root mean square error (RMSE) of 12.13 mV and the LSTM achieving an RMSE of 0.0118 Ah. Regular updates to the battery’s current capacity, along with the proposed IOBM, significantly improved SOC estimation performance, maintaining estimation errors within 1.08%.

Keywords: lithium-ion battery; battery health management; state of health estimation; state of charge estimation; battery modelling (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
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