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Energies 2017, 10(1), 85; doi:10.3390/en10010085

Integrated Equivalent Circuit and Thermal Model for Simulation of Temperature-Dependent LiFePO4 Battery in Actual Embedded Application

1
School of Engineering, Temasek Polytechnic, 21 Tampines Avenue 1, Singapore 529757, Singapore
2
School of Marine Science and Technology, Newcastle University, Newcastle upon Tyne NE1 7RU, UK
3
School of Electrical and Electronic Engineering, Newcastle University, Newcastle upon Tyne NE1 7RU, UK
*
Author to whom correspondence should be addressed.
Academic Editor: William Holderbaum
Received: 11 October 2016 / Revised: 14 December 2016 / Accepted: 4 January 2017 / Published: 11 January 2017
(This article belongs to the Special Issue Control of Energy Storage)

Abstract

A computational efficient battery pack model with thermal consideration is essential for simulation prototyping before real-time embedded implementation. The proposed model provides a coupled equivalent circuit and convective thermal model to determine the state-of-charge (SOC) and temperature of the LiFePO4 battery working in a real environment. A cell balancing strategy applied to the proposed temperature-dependent battery model balanced the SOC of each cell to increase the lifespan of the battery. The simulation outputs are validated by a set of independent experimental data at a different temperature to ensure the model validity and reliability. The results show a root mean square (RMS) error of 1.5609 × 10−5 for the terminal voltage and the comparison between the simulation and experiment at various temperatures (from 5 °C to 45 °C) shows a maximum RMS error of 7.2078 × 10−5. View Full-Text
Keywords: lithium-ion battery; battery management system; convective thermal model; cell model; state-of-charge lithium-ion battery; battery management system; convective thermal model; cell model; state-of-charge
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Gao, Z.; Chin, C.S.; Woo, W.L.; Jia, J. Integrated Equivalent Circuit and Thermal Model for Simulation of Temperature-Dependent LiFePO4 Battery in Actual Embedded Application. Energies 2017, 10, 85.

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