Cited by 906Advanced Battery Technologies ResearchAdvancements in Battery MaterialsControl Systems and Identification

Long Short-Term Memory Networks for Accurate State-of-Charge Estimation of Li-ion Batteries

Chemali, Ephrem, Kollmeyer, Phillip J., Preindl, Matthias, Ahmed, Ryan, Emadi, Ali·2018·IEEE Transactions on Industrial Electronics

Abstract

State of charge (SOC) estimation is critical to the safe and reliable operation of Li-ion battery packs, which nowadays are becoming increasingly used in electric vehicles (EVs), Hybrid EVs, unmanned aerial vehicles, and smart grid systems. We introduce a new method to perform accurate SOC estimation for Li-ion batteries using a recurrent neural network (RNN) with long short-term memory (LSTM). We showcase the LSTM-RNN's ability to encode dependencies in time and accurately estimate SOC without using any battery models, filters, or inference systems like Kalman filters. In addition, this machine-learning technique, like all others, is capable of generalizing the abstractions it learns during training to other datasets taken under different conditions. Therefore, we exploit this feature by training an LSTM-RNN model over datasets recorded at various ambient temperatures, leading to a single network that can properly estimate SOC at different ambient temperature conditions. The LSTM-RNN achieves a low mean absolute error (MAE) of 0.573% at a fixed ambient temperature and an MAE of 1.606% on a dataset with ambient temperature increasing from 10 to 25 °C.

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Crossref · 10.1109/tie.2017.2787586

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Authors
Chemali, E., Kollmeyer, P. J., Preindl, M., Ahmed, R., & Emadi, A.
Affiliations
  • McMaster University (CA)
  • Columbia University (US)
Venue
IEEE Transactions on Industrial Electronics
Published
2018-08
Volume
65
Issue
8
Pages
6730-6739
ISSN
  • 0278-0046 (ISSN-L)
  • 1557-9948
OpenAlex
W2776458183
Cited by
906
References
40
Citations by year
2026: 125 · 2025: 142 · 2024: 141 · 2023: 135 · 2022: 121 · 2021: 98 · 2020: 78 · 2019: 50 · 2018: 16
FWCI
24.97
Type
journal article
Language
en
Open access
closed
Locations
IEEE Transactions on Industrial Electronics (publishedVersion)
Funders
Canada Excellence Research Chair in Hybrid Powertrain Program
Topics
  • Physical Sciences › Engineering › Automotive Engineering › Advanced Battery Technologies Research
  • Physical Sciences › Engineering › Electrical and Electronic Engineering › Advancements in Battery Materials
  • Physical Sciences › Engineering › Control and Systems Engineering › Control Systems and Identification
Keywords
state of charge estimation, lithium-ion batteries, long short-term memory, recurrent neural networks, ambient temperature, model-free estimation, electric vehicles

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