Electro‑thermal model for lithium‑ion battery simulations

Yibin Cai; Yanbo Che; Hongfeng Li; Mingda Jiang; Peijun Qin

Electro‑thermal model for lithium‑ion battery simulations

Vol. 21, No. 10, pp. 1530-1541, Oct. 2021

10.1007/s43236-021-00300-1

Lithium battery

Equivalent circuit model

Thermal model

Parameter identification

Abstract

With the extensive application of lithium batteries and the continuous improvements in battery management systems and other related technologies, the requirements for fast and accurate modeling of lithium batteries are gradually increasing. Temperature plays a vital role in the dynamics and transmission of electrochemical systems. The thermal effect must be considered in battery models. In this paper, a simulation model of a lithium battery with thermal characteristics is established. This thermal model is coupled with a temperature-dependent 2-RC equivalent circuit model to form an electro-thermal model for lithium-ion batteries. The hybrid pulse power characterization test is used to estimate the equivalent circuit parameters. Finally, under NEDC and DST conditions, battery voltage and temperature estimation results of the electro-thermal model are analyzed to verify the correctness and accuracy of the model. The voltage error is within − 0.16 ~ 0.20 V under the NEDC condition. Moreover, under the DST condition, the maximum relative error in the electro-thermal model is within 5%.

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Cite this article

[IEEE Style]

Y. Cai, Y. Che, H. Li, M. Jiang, P. Qin, "Electro‑thermal model for lithium‑ion battery simulations," Journal of Power Electronics, vol. 21, no. 10, pp. 1530-1541, 2021. DOI: 10.1007/s43236-021-00300-1.

[ACM Style]

Yibin Cai, Yanbo Che, Hongfeng Li, Mingda Jiang, and Peijun Qin. 2021. Electro‑thermal model for lithium‑ion battery simulations. Journal of Power Electronics, 21, 10, (2021), 1530-1541. DOI: 10.1007/s43236-021-00300-1.