Online Internal Temperature Estimation for Lithium-Ion Batteries Based on Kalman Filter

Jinlei Sun, Guo Wei, Lei Pei, Rengui Lu, Kai Song, Chao Wu and Chunbo Zhu
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Jinlei Sun: School of Electrical Engineering and Automation, Harbin Institute of Technology, Harbin 150001, China
Guo Wei: School of Electrical Engineering and Automation, Harbin Institute of Technology, Harbin 150001, China
Lei Pei: School of Electrical Engineering and Automation, Harbin Institute of Technology, Harbin 150001, China
Rengui Lu: School of Electrical Engineering and Automation, Harbin Institute of Technology, Harbin 150001, China
Kai Song: School of Electrical Engineering and Automation, Harbin Institute of Technology, Harbin 150001, China
Chao Wu: School of Electrical Engineering and Automation, Harbin Institute of Technology, Harbin 150001, China
Chunbo Zhu: School of Electrical Engineering and Automation, Harbin Institute of Technology, Harbin 150001, China

Energies, 2015, vol. 8, issue 5, 1-16

Abstract: The battery internal temperature estimation is important for the thermal safety in applications, because the internal temperature is hard to measure directly. In this work, an online internal temperature estimation method based on a simplified thermal model using a Kalman filter is proposed. As an improvement, the influences of entropy change and overpotential on heat generation are analyzed quantitatively. The model parameters are identified through a current pulse test. The charge/discharge experiments under different current rates are carried out on the same battery to verify the estimation results. The internal and surface temperatures are measured with thermocouples for result validation and model construction. The accuracy of the estimated result is validated with a maximum estimation error of around 1 K.

Keywords: internal temperature estimation; Kalman filter; thermal model; heat generation; entropy change (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2015
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (9)

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