Peng Tonghui, Gao Wei, Wu Ya, Ma Yulong, Zhang Shiwu, Hu Yinan
CAS Key Laboratory of Mechanical Behavior and Design of Materials, Department of Precision Machinery and Precision Instrumentation, School of Engineering Science, University of Science and Technology of China, Hefei 230027, China.
Chinainstru & Quantumtech (Hefei) Co., Ltd., Hefei 230031, China.
Rev Sci Instrum. 2024 Oct 1;95(10). doi: 10.1063/5.0218273.
With the wide application of electric energy storage component arrays, such as battery cell arrays, capacitor arrays, and inductor arrays, their potential safety risks have gradually drawn the public attention. However, existing technologies cannot realize rapid, precise, and nondestructive localization of the faulty component within these large-scale arrays, especially for a component with an early stage short-circuit fault. To address this challenge, this paper proposes a magnetic field based method and realizes precise fault localization by inducing an alternating magnetic field from the target array, unlike previous research where a static magnetic field was induced. Through establishing a physical model of the short-circuit component as well as the whole array, a spatial filtering algorithm based on beamforming techniques is utilized to process the measured magnetic field data in real time. Both the simulation and experimental results demonstrate the capability of the proposed method in enhancing the security of electric energy storage component arrays. Within an imaging area of 80 × 80 mm2, the proposed method can accurately locate the faulty component out of a nine-component array, with an error of only 0.72 mm for capacitors and 0.91 mm for battery cells.
随着电池组阵列、电容器阵列和电感器阵列等电能存储组件阵列的广泛应用，其潜在的安全风险逐渐引起了公众的关注。然而，现有技术无法实现对这些大规模阵列中故障组件的快速、精确和无损定位，特别是对于具有早期短路故障的组件。为应对这一挑战，本文提出了一种基于磁场的方法，通过从目标阵列感应交变磁场来实现精确的故障定位，这与以往感应静磁场的研究不同。通过建立短路组件以及整个阵列的物理模型，利用基于波束形成技术的空间滤波算法实时处理测量的磁场数据。仿真和实验结果均证明了该方法在提高电能存储组件阵列安全性方面的能力。在80×80平方毫米的成像区域内，该方法能够从九组件阵列中准确地定位出故障组件，对于电容器的定位误差仅为0.72毫米，对于电池的定位误差为0.91毫米。
