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Temperature characterization analysis of LiFePO4/C power battery during charging and discharging

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Abstract

In order to study the surface temperature change and distribution during charging and discharging and in the simulation working condition of LiFePO4/C power battery at normal temperature, the surface temperature is tested by placing the battery in the incubator and fixing 10 temperature probes on the battery surface. Results show that the temperature of the upper part is higher, and the temperature at the bottom is the lowest, while around the positive electrode is the highest during charging and discharging. The maximum temperature rising rate is reached at the moment of constant current charging transforming to the constant voltage charging during charging, and at the end moment during discharging. During charging in a certain range and discharging, the relations between the maximum temperature, the average temperature rising rate, and the maximum temperature difference of all the measurement points at the same time and the current are approximately linear, respectively. In the simulation working condition, the moment of the maximum temperature is consistent with the large current discharging instantaneous in each stage.

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Acknowledgements

This study is supported by the National Key Basic Research and Development Program of China (Grant No. 2009CB220100)and the basic research project of Beijing Institute of Technology (Grant No. 20081042005).

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Authors and Affiliations

  1. School of Chemical Engineering and Environment, Beijing Institute of Technology, Beijing, 100081, China

    Kai Yang, Jin Jing An & Shi Chen

  2. Electrical Engineering Department, China Electric Power Research Institute, Beijing, 100192, China

    Kai Yang

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  1. Kai Yang
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  2. Jin Jing An
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  3. Shi Chen
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Correspondence to Shi Chen.

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Yang, K., An, J.J. & Chen, S. Temperature characterization analysis of LiFePO4/C power battery during charging and discharging. J Therm Anal Calorim 99, 515–521 (2010). https://doi.org/10.1007/s10973-009-0623-1

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  • DOI: https://doi.org/10.1007/s10973-009-0623-1

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