Temperature-dependent multiscale-dynamics in Lithium-ion battery electrochemical models
Temperature-dependent multiscale-dynamics in Lithium-ion battery electrochemical models
复制标题
锂离子电池电化学模型中温度相关的多尺度动力学
DOI：
10.1109/acc.2015.7170753
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
I. Battiato
中科院分区：
文献类型：
--
作者：
H. Arunachalam;S. Onori;I. Battiato
在锂离子电池中，三个微尺度传输过程（即扩散、电迁移和非均相反应）之间的相对重要性可以使用无量纲的电Pe <$clet（Pe）和Damko Eschhler（Da）数来量化。通过均匀化技术，我们将孔隙尺度的Poisson-Nernst-Planck方程提升到宏观尺度，并在（Da，Pe）空间中制定相图，该相图确定了等温电化学宏观模型提供微观尺度动力学准确描述的适用性条件[1]。在这项工作中，我们专注于温度对宏观（纽曼型）模型的准确性的影响，一些市售的锂离子电池。我们表明，宏观模型是能够准确地表示孔尺度的动态只有在特定的温度范围内，其准确性是强烈控制的电池工作温度条件。
In a Lithium-ion battery, the relative importance between the three microscale transport processes, i.e. diffusion, electromigration and heterogeneous reaction, can be quantified using the dimensionless Electric Péclet (Pe) and Damköhler (Da) numbers. By means of homogenization technique, we upscale the pore-scale Poisson-Nernst-Planck equation to the macroscopic scale and formulate a phase diagram in the (Da,Pe)-space that identifies the applicability conditions under which isothermal electrochemical macroscopic models provide an accurate description of the micro-scale dynamics [1]. In this work, we focus on the effect of temperature on macroscale (Newman-type) models' accuracy for a number of commercially available lithium-ion batteries. We show that macroscopic models are able to accurately represent pore-scale dynamics only within specific temperature bounds and their veracity is strongly controlled by the battery operating temperature conditions.