Fault Diagnosis of Lithium-Ion battery External Short Circuit Based on Magnetic Field

doi:10.3901/JME.260188

Abstract

Abstract: Fault diagnosis is recognized as a crucial method for addressing lithium battery safety issues, yet traditional approaches remain limited in meeting the demands for rapid and accurate external short-circuit detection in applications such as electric vehicles and energy storage systems. The magnetic field-based diagnostic method is proposed, utilizing the principle of magnetic induction during short circuits. The coupled three-dimensional simulation model is established, employing non-local coupling with current density to analyze magnetic variations under short-circuit conditions, revealing the correlation between faults and the magnetic field. The experimental platform and magnetic detection system are constructed, and tests with different SOC and short-circuit resistances are designed. The results demonstrate that this non-contact method achieves high sensitivity in diagnosing various types and degrees of external short circuits, confirming its feasibility and significance for improving battery safety, enabling batch cell inspection, and advancing diagnostic techniques.

Key words: lithium-ion battery, external short circuit, magnetic field, fault diagnosis

CLC Number:

TM911

ZHENG Siyuan, LI Xiaoyu, WEI Xinyu, WEI Zhuohao. Fault Diagnosis of Lithium-Ion battery External Short Circuit Based on Magnetic Field[J]. Journal of Mechanical Engineering, 2025, 62(6): 220-227.

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URL: http://www.cjmenet.com.cn/EN/10.3901/JME.260188

http://www.cjmenet.com.cn/EN/Y2025/V62/I6/220

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