Non-contact detection of single-cell lead-acid battery electrodes’ defects through conductivity reconstruction by magnetic induction tomography

IF 1.1 4区工程技术 Q3 ENGINEERING, MULTIDISCIPLINARY

Inverse Problems in Science and Engineering Pub Date : 2021-05-04 DOI:10.1080/17415977.2021.1918127

Shujian Tang, Guogang Zhang, Lijia Ge, Zhengxiang Song, Yingsan Geng, Jianhua Wang

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引用次数: 1

Abstract

The change of electrodes’ conductivity is a crucial parameter during battery aging process, non-contact detection of battery electrodes’ defects through conductivity reconstruction is an innovative technology. In this paper, the magnetic induction tomography (MIT) was applied to reconstruct the conductivity of electrodes, the simplified battery models with complete and broken electrodes were chosen as target A and target Brespectively, and an eight-channel MIT system was designed to measure the change of mutual induced voltage. A method of computing the forward problem called ‘A·E’ was adopted to compute the coefficient matrix for the forward problem and the frequency 12.665kHz was chosen as the excitation frequency. Based on the conductivity reconstruction images, relative errors of reconstructed conductivity and objective function, ‘A·E’ method exhibited advantages in terms of computation time and accuracy compared to coefficient sensitivity method with the simulation data. In order to test the accuracy of ‘A·E’ method, data measured by MIT system was applied in the inverse problem with four regularization parameter selection methods. L-curve criterion and generalized cross-validation criterion identified defects successfully as they were more sensitive to the change of conductivity.

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磁感应层析成像电导率重建的单芯铅酸电池电极缺陷非接触检测

电极电导率的变化是电池老化过程中的一个关键参数，通过电导率重建非接触式检测电池电极缺陷是一项创新技术。本文应用磁感应层析成像（MIT）重建电极的导电性，分别选择电极完整和断裂的简化电池模型作为目标A和目标B，并设计了一个八通道MIT系统来测量互感电压的变化。采用一种称为“A·E”的正向问题计算方法来计算正向问题的系数矩阵，并选择频率12.665kHz作为激励频率。基于电导率重建图像、重建电导率和目标函数的相对误差，与模拟数据的系数灵敏度方法相比，“A·E”方法在计算时间和精度方面具有优势。为了检验“A·E”方法的准确性，将MIT系统测量的数据应用于四种正则化参数选择方法的逆问题中。L-曲线准则和广义交叉验证准则成功地识别了缺陷，因为它们对电导率的变化更敏感。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Inverse Problems in Science and Engineering 工程技术-工程：综合

自引率

0.00%

发文量

审稿时长

6 months

期刊介绍： Inverse Problems in Science and Engineering provides an international forum for the discussion of conceptual ideas and methods for the practical solution of applied inverse problems. The Journal aims to address the needs of practising engineers, mathematicians and researchers and to serve as a focal point for the quick communication of ideas. Papers must provide several non-trivial examples of practical applications. Multidisciplinary applied papers are particularly welcome. Topics include: -Shape design: determination of shape, size and location of domains (shape identification or optimization in acoustics, aerodynamics, electromagnets, etc; detection of voids and cracks). -Material properties: determination of physical properties of media. -Boundary values/initial values: identification of the proper boundary conditions and/or initial conditions (tomographic problems involving X-rays, ultrasonics, optics, thermal sources etc; determination of thermal, stress/strain, electromagnetic, fluid flow etc. boundary conditions on inaccessible boundaries; determination of initial chemical composition, etc.). -Forces and sources: determination of the unknown external forces or inputs acting on a domain (structural dynamic modification and reconstruction) and internal concentrated and distributed sources/sinks (sources of heat, noise, electromagnetic radiation, etc.). -Governing equations: inference of analytic forms of partial and/or integral equations governing the variation of measured field quantities.