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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This work was supported by the Key Research and Development Program of Tianjin (No. 20YFYSGX00060).
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Cai, Y., Che, Y., Li, H. et al. Electro-thermal model for lithium-ion battery simulations. J. Power Electron. 21, 1530–1541 (2021). https://doi.org/10.1007/s43236-021-00300-1
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DOI: https://doi.org/10.1007/s43236-021-00300-1