State-of-Charge Estimation of NMC-based Li-ion Battery Based on Continuous Transfer Function Model and Extended Kalman Filter

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Abstract

Lithium-ion (Li) battery based on nickel-manganese-cobalt (NMC) cathode has emerged as one of the most successful battery types for powertrain of Electric Vehicles (EVs). The effective management of the NMC-based battery relies on accurate estimation of its State-of-Charge (SoC) in the Battery Management System (BMS). In this paper, an effective system identification approach is applied to establish the battery model using a Continuous Transfer Function (CTF) model. The Akaike information criterion (AIC) is applied to obtain the suitable model structure considering the accuracy and real-time efficiency of the model. Then, the SoC Estimation is fulfilled based on the developed model and the Extended Kalman Filter (EKF) algorithm. The correct performance of the proposed method is evaluated and confirmed using experimental data of 3.4 Ah 3.7 V NMC-based battery cells. Likewise, the feasibility of embedded implementation is proven through some Hardware-in-the-Loop (HiL) tests.

Original languageEnglish
Title of host publication2021 12th Power Electronics, Drive Systems, and Technologies Conference, PEDSTC 2021
Number of pages5
PublisherIEEE Signal Processing Society
Publication date2 Feb 2021
Article number9405847
ISBN (Print)978-1-6654-4772-0
ISBN (Electronic)978-1-6654-0366-5
DOIs
Publication statusPublished - 2 Feb 2021
Event12th Power Electronics, Drive Systems, and Technologies Conference, PEDSTC 2021 - Tabriz, Iran, Islamic Republic of
Duration: 2 Feb 20214 Feb 2021

Conference

Conference12th Power Electronics, Drive Systems, and Technologies Conference, PEDSTC 2021
Country/TerritoryIran, Islamic Republic of
CityTabriz
Period02/02/202104/02/2021
Series2021 12th Power Electronics, Drive Systems, and Technologies Conference, PEDSTC 2021

Bibliographical note

Funding Information:
ACKNOWLEDGMENT This work has been supported in part by Iran's National Elite's Foundation, in part by Electric Mobility Europe Call 2016 (ERA-NET COFUND) and Innovation Fund Denmark grant number 7064-00011B as part of the transnational eVolution2Grid (V2G) project.

Publisher Copyright:
© 2021 IEEE.

Copyright:
Copyright 2021 Elsevier B.V., All rights reserved.

Keywords

  • Battery Management System (BMS)
  • State Estimation
  • System Identification

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