Cited by 148Advanced Battery Technologies ResearchAdvancements in Battery MaterialsElectric and Hybrid Vehicle Technologies

State of Charge Estimation of Lithium-Ion Batteries Using LSTM and NARX Neural Networks

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Wei, Meng, Ye, Min, Li, Jia Bo, Wang, Qiao, Xu, Xinxin·2020·IEEE Access

Abstract

Highly accurate state of charge (SOC) estimation of lithium-ion batteries is one of the key technologies of battery management systems in electric vehicles. The performance of SOC estimation directly influences the driving range and safety of these vehicles. Due to external disturbances, temperature variation and electromagnetic interference, accurate SOC estimation becomes difficult. To accurately estimate the SOC of lithium-ion batteries, this article presents a novel machine-learning method to address the risk of gradient explosion and gradient decent using the dynamic nonlinear auto-regressive models with exogenous input neural network (NARX) with long short-term memories (LSTM).The proposed hybrid NARX model embeds LSTM memory, which provides jump-ahead connections in the time-unfolded model. These jump-ahead connections provide a shorter path for the propagation of gradient information, therefore reducing long-term dependence on the recurrent neural network. Experimental results show that the estimation performance root mean square error (RMSE) of the proposed model is less than 1%, and this model has better multitime prediction performance. Finally, the hybrid NARX and LSTM model is compared with the standard back propagation neural network based on particle swarm optimization (BPNN-PSO), the least-squares support vector machine (LS-SVM) and LSTM existing models under urban dynamometer driving schedule (UDDS) and dynamic stress test (DST) conditions. The proposed hybrid NARX-LSTM model yield relative to other methods and can estimate the battery SOC with high accuracy. The RMSE of proposed model is improved by approximately 60% compared with the standard LSTM.

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Research works printed but not linked: 2

  1. Q. Wei et al., ''Study on the state of health detection of power batteries based on adaptive unscented Kalman filters and the battery echelon utiliza- tion,'' Trans. China Electrotechnical Soc., vol. 34, no. 18, pp. 3937-3948, 2019.
  2. MIN YE (Member, IEEE) received the B.Sc. and M.Sc. degrees in mechatronics engineering from Chang'an University, in 2000 and 2004, respec- tively, and the Ph.D. degree in mechatronics engi- neering from Xi'an Jiaotong University, in 2008.

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Authors
Wei, M., Ye, M., Li, J. B., Wang, Q., & Xu, X.
Affiliations
Chang'an University (CN)
Venue
IEEE Access
Published
2020
Volume
8
Pages
189236-189245
ISSN
2169-3536 (ISSN-L)
OpenAlex
W3093838722
Cited by
148
References
37
Citations by year
2026: 27 · 2025: 31 · 2024: 26 · 2023: 31 · 2022: 21 · 2021: 11 · 2020: 1
FWCI
5.92
Type
journal article
Language
en
Open access
Locations
  • IEEE Access (publishedVersion, cc-by)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
  • National Key Research and Development Program of China (2018YFE0120200)
  • National Natural Science Foundation of China (51805041)
  • Major Scientific and Technological Projects in Henan Province (191110211500)
  • National Engineering Laboratory for Highway Maintenance Equipment, Chang’an University, Xi’an, Shaanxi, for experimental equipment
Topics
  • Physical Sciences › Engineering › Automotive Engineering › Advanced Battery Technologies Research
  • Physical Sciences › Engineering › Electrical and Electronic Engineering › Advancements in Battery Materials
  • Physical Sciences › Engineering › Automotive Engineering › Electric and Hybrid Vehicle Technologies
Keywords
state of charge estimation, lithium-ion batteries, battery management systems, electric vehicles, NARX neural network, long short-term memory, gradient explosion, multi-step forecasting, UDDS, dynamic stress test

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