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离子电池的高保真层次建模:一个跨度电化学机械框架

Xiaoyu Li¹, Shen Zhao¹, Chiton Gwan¹

¹School of Mechanical Engineering, Hebei University of Technology, Tianjin, China.

Communications engineering

|December 16, 2025

概括

机械应力会影响离子电池 (LIB) 的性能. 本研究引入了用于非破坏性参数识别的多尺度模型,改进了LIB数字双胞胎.

科学领域:

材料科学材料科学材料科学
电化学电化学电化学
机械工程机械工程

背景情况:

机械应力显著影响离子电池 (LIB) 的性能和寿命.
现有的模型只使用电压数据进行多尺度应力分析和参数识别.

研究的目的:

为LIBs开发一个多尺度的电化学-机械-热模型.
通过合电压和应变数据来实现非破坏性参数识别.
为了提高LIB性能模拟的准确性.

主要方法:

在多物理框架中,将粒子尺度应变与电极尺度位移结合起来.
使用扩散诱导应力 (DIS) 和电压进行参数灵敏度分析.
采用帕雷托前线多目标战略进行参数识别.

主要成果:

实现了高准确度预测,平均绝对百分比误差低于电压的1%和应变的3.6%.
通过使用一种新的电压-应变策略,成功确定了关键模型参数.
证明了模型模拟合的电化学,机械和热行为的能力.

结论:

拟议的框架使LIBs中多物理现象的准确,高保真模拟成为可能.
提供了一种有效的方法,以非破坏性的方式校准关键模型参数.
为创造可靠的离子电池数字双胞胎铺平了道路.

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