Thin Plate Spline-Based Coulombic Efficiency Prediction of Lithium Battery

2014 Fourth International Conference on Instrumentation and Measurement, Computer, Communication and Control Pub Date : 2014-09-18 DOI:10.1109/IMCCC.2014.72

Dan Liu, Xin Liu, Qisong Wang, Yan Zhang, Jinwei Sun, Chunbo Zhu

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引用次数: 2

Abstract

The performance of lithium-ion rechargeable battery depends on its coulombic efficiency, which determines the measurement accuracy of the state of charge as well. In this context, the regularity that coulombic efficiency changes with environmental temperature and charge-discharge rate was analyzed in different cases, and a TPS (Thin Plate Spline) surface fitting-based coulombic efficiency estimation method was proposed for lithium-ion rechargeable battery. The presented method has a unique advantage in 3D smooth surface interpolation, which made it possible to model the functional relationship between battery coulombic efficiency, ambient temperature and charge-discharge rate, and then adjust the reconstructed precision with the plate rigidity sequentially. The experimental results illustrate that the proposed method is able to estimate the corresponding coulombic efficiency in the presumed range of ambient temperature and charge-discharge rate without battery cycling procedure. Furthermore, the accuracy and promptness of the novel method are verified simultaneously.

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基于薄板样条的锂电池库仑效率预测

锂离子可充电电池的性能取决于其库仑效率，库仑效率也决定了充电状态测量的准确性。在此基础上，分析了不同情况下库伦效率随环境温度和充放电速率的变化规律，提出了一种基于TPS (Thin Plate Spline)曲面拟合的锂离子可充电电池库伦效率估计方法。该方法在三维光滑曲面插值方面具有独特的优势，可以模拟电池库仑效率、环境温度和充放电率之间的函数关系，然后根据极板刚度顺序调整重构精度。实验结果表明，该方法能够在假定的环境温度和充放电速率范围内估算出相应的库仑效率，而无需电池循环过程。同时验证了该方法的准确性和快速性。

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2014 Fourth International Conference on Instrumentation and Measurement, Computer, Communication and Control

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