Current Trends for State-of-Charge (SoC) Estimation in Lithium-Ion Battery Electric Vehicles

Ingvild B. Espedal, Asanthi Jinasena, Odne S. Burheim and Jacob J. Lamb
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Ingvild B. Espedal: Department of Energy and Process Engineering & ENERSENSE, NTNU, 7491 Trondheim, Norway
Asanthi Jinasena: Department of Energy and Process Engineering & ENERSENSE, NTNU, 7491 Trondheim, Norway
Odne S. Burheim: Department of Energy and Process Engineering & ENERSENSE, NTNU, 7491 Trondheim, Norway
Jacob J. Lamb: Department of Energy and Process Engineering & ENERSENSE, NTNU, 7491 Trondheim, Norway

Energies, 2021, vol. 14, issue 11, 1-24

Abstract: Energy storage systems (ESSs) are critically important for the future of electric vehicles. Despite this, the safety and management of ESSs require improvement. Battery management systems (BMSs) are vital components in ESS systems for Lithium-ion batteries (LIBs). One parameter that is included in the BMS is the state-of-charge (SoC) of the battery. SoC has become an active research area in recent years for battery electric vehicle (BEV) LIBs, yet there are some challenges: the LIB configuration is nonlinear, making it hard to model correctly; it is difficult to assess internal environments of a LIB (and this can be different in laboratory conditions compared to real-world conditions); and these discrepancies can lead to raising the instability of the LIB. Therefore, further advancement is required in order to have higher accuracy in SoC estimation in BEV LIBs. SoC estimation is a key BMS feature, and precise modeling and state estimation will improve stable operation. This review discusses current methods use in BEV LIB SoC modelling and estimation. The review culminates in a brief discussion of challenges in BEV LIB SoC prediction analysis.

Keywords: lithium-ion battery; state-of-charge; modelling; battery management systems (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: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (14)

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