In-line detection of pouch foil damage in batteries during manufacturing using lamb waves

IF 4.1 2区材料科学 Q1 MATERIALS SCIENCE, CHARACTERIZATION & TESTING

Ndt & E International Pub Date : 2025-01-20 DOI:10.1016/j.ndteint.2025.103322

Patrick Swaschnig , Johannes Kofler , Reinhard Klambauer , Alexander Bergmann

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Abstract

This study presents a novel approach to detect damaged pouch foils in lithium-ion batteries by analyzing changes in their mechanical properties using Lamb waves. A contactless measurement system combining an electromagnetic acoustic transducer (EMAT) and a laser vibrometer was developed and tested during the back-end production process of batteries. Three data analysis methods – signal amplitude difference, time-of-flight (ToF) analysis, and root mean square error (RMSE) analysis – were evaluated. Proof-of-principle measurements showed that all three methods effectively detected damage in the absence of the back-end process, confirming that pouch foil damage changes the mechanical properties and thus the propagation of Lamb waves in a battery. This approach integrated into the production line could significantly improve the safety, reliability, and performance of lithium-ion batteries through real-time monitoring and quality control. Since the measurement system is contactless, it represents a practical and non-invasive solution for different stages of battery production.

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来源期刊

Ndt & E International 工程技术-材料科学：表征与测试

CiteScore

7.20

自引率

9.50%

发文量

121

审稿时长

55 days

期刊介绍： NDT&E international publishes peer-reviewed results of original research and development in all categories of the fields of nondestructive testing and evaluation including ultrasonics, electromagnetics, radiography, optical and thermal methods. In addition to traditional NDE topics, the emerging technology area of inspection of civil structures and materials is also emphasized. The journal publishes original papers on research and development of new inspection techniques and methods, as well as on novel and innovative applications of established methods. Papers on NDE sensors and their applications both for inspection and process control, as well as papers describing novel NDE systems for structural health monitoring and their performance in industrial settings are also considered. Other regular features include international news, new equipment and a calendar of forthcoming worldwide meetings. This journal is listed in Current Contents.