Performance evaluation of lithium battery pack based on MATLAB simulation with lumped parameter thermal model

Liteng Zeng, Yuli Hu, Chengyi Lu, Guang Pan

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

The capacity of lithium batteries varies under different temperature conditions. However, many studies still neglect the influence of temperature on battery capacity. Besides, some studies only considered the combination of the heat and electricity of the battery monomer and failed to study the performance of the battery pack in groups. This paper investigates a new method for dynamic situations that takes the influence of temperature on battery capacity into consideration. After acquiring the parameter through experiment, we can substitute the performance parameters into the thermoelectric coupling model and use MATLAB to realize the iterative calculation of thermoelectric coupling. By combining the grouping mode with the model, we can simulate the thermodynamic and electrical properties of the battery cell in the pack. The novelty is evident because the paper focused on the battery pack instead of a single cell and the lumped parameter thermal model is adopted. Besides, the method proposed in this paper considered the influence of temperature on battery capacity. The program of calculation process can be solidified on the vehicle system. After the simulation, we can get the available capacity of the battery pack at different initial temperatures, with different grouping modes and different inconsistency of parameters. The results predicted by MATLAB model are compared with the results of MATLAB-FLUENT thermoelectric coupling simulation. The result reflects that the prediction by the MATLAB model about the available capacity, temperature, and residual electricity is of good precision.

Original languageEnglish
Pages (from-to)2614-2629
Number of pages16
JournalEnergy Science and Engineering
Volume11
Issue number7
DOIs
StatePublished - Jul 2023

Keywords

  • lithium battery pack
  • MATLAB-FLUENT joint simulation
  • temperature
  • thermoelectric coupling

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