Abstract
The safety of lithium-ion battery has received widespread attention. Among them, external short-circuit faults often cause more serious battery safety accidents. In this paper, an electrochemical-thermal model based on Pseudo two-dimensional electrochemical modelling theory and the law of conservation of energy is developed for external short-circuit faults in lithium-ion batteries, and accurate simulation of external short-circuit faults in batteries is achieved through parameter identification. The root mean square errors of the model simulation voltage, current and temperature are 76.9 mV, 46.25 A, and 5.76 ℃, respectively. Based on the established model, the initial SOC, ambient temperature, particle radius of electrode material and exchange current density were selected as the control variables, to investigate the influence of different short circuit initial conditions on the external short circuit characteristics. The results show that the temperature rise rate of the external short circuit of the battery is greater at low initial SOC values and low temperatures.
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Acknowledgments
This work is supported by the National Key R&D Program of China (Grant No. 2021YFB2501900) and the Joint Fund of Ministry of Education of China for Equipment Pre-research (Grant No. 8091B022130).
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Ma, S., Sun, B., Ma, S., Su, X., Zhou, X. (2023). Simulation Study of External Short Circuit Characteristics for Lithium-Ion Battery Based on Electrochemical-Thermal Model. In: Sun, F., Yang, Q., Dahlquist, E., **ong, R. (eds) The Proceedings of the 5th International Conference on Energy Storage and Intelligent Vehicles (ICEIV 2022). ICEIV 2022. Lecture Notes in Electrical Engineering, vol 1016. Springer, Singapore. https://doi.org/10.1007/978-981-99-1027-4_36
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DOI: https://doi.org/10.1007/978-981-99-1027-4_36
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