Impact of solid-electrolyte interphase layer thickness on lithium-ion battery cell surface temperature
Impact of solid-electrolyte interphase layer thickness on lithium-ion battery cell surface temperature
复制标题
DOI：
10.1016/j.jpowsour.2022.231126
复制
发表时间：
2022-03
影响因子：
9.2
通讯作者：
I. Andriunas;Z. Milojević;N. Wade;P. Das
中科院分区：
文献类型：
--
作者：
I. Andriunas;Z. Milojević;N. Wade;P. Das
广泛使用的非破坏性电池表征技术，例如电压、容量和阻抗测量，在设想废旧电池的再利用时，通常不能完全地鉴定废弃的锂离子电池。在这里，我们提出了一种工具，该工具使用袋状电池的表面温度来测量固体电解质界面（SEI）层的厚度，这通常被认为是锂离子电池在0.1C-1C放电速率下退化的主要原因之一。在环境条件下。一个二维多物理场耦合的电化学-热连续介质模型和一个三维热模型已被开发，以调查在不同的SEI层厚度的锂离子软包电池的表面温度的变化。目前的建模结果表明，由于显着的SEI层在几个放电率的热生成的细胞表面温度的变化。此外，温度变化还受到不同冷却条件和颗粒尺寸的影响。目前的结果提供了一个参考，通过提供的SEI层厚度与电池的表面温度之间的相关性，并告知未来的研究热失控作为一个较厚的SEI层可以降低热失控的起始温度，对电池的再利用决策。
The widely used non-destructive battery characterization techniques, such as voltage, capacity, and impedance measurements, often fail to fully characterise a discarded lithium-ion battery when reuse of spent battery is envisaged. Here we propose a tool that uses the surface temperature of a pouch cell to measure the thickness of the solid-electrolyte-interphase (SEI) layer, which is often attributed as one of the main causes of lithium-ion battery degradation at 0.1C–1C discharge rates in ambient conditions. A 2D multiphysics coupled electrochemical-thermal continuum model and a 3D thermal model have been developed to investigate the changes in the surface temperature of a lithium-ion pouch cell with varying SEI layer thicknesses. Present modelling results show that the cell surface temperature changes due to significant SEI layer heat generation at several discharge rates. Furthermore, the temperature change has also been subject to different cooling conditions and particle sizes. The present results provide a reference to making decisions on battery reuse by providing a correlation between the SEI layer thickness with the surface temperature of the cell and inform future research on thermal runaway as a thicker SEI layer can decrease the onset temperature of thermal runaway.