Dual-surface li-ion battery deformation measurement by temporal electronic speckle pattern interferometry

Kunhan Yang; Zhipeng Sheng; Bing Chen; Xiaoyu Li; Yu Fu

doi:10.1117/12.2667169

27 January 2023 Dual-surface li-ion battery deformation measurement by temporal electronic speckle pattern interferometry

Kunhan Yang, Zhipeng Sheng, Bing Chen, Xiaoyu Li, Yu Fu

Author Affiliations +

Proceedings Volume 12550, International Conference on Optical and Photonic Engineering (icOPEN 2022); 125501S (2023) https://doi.org/10.1117/12.2667169
Event: International Conference on Optical and Photonic Engineering (icOPEN 2022), 2022, ONLINE, China

Abstract

he safety, performance, and lifetime of lithium-ion cells are critical for the acceptance of electric vehicles (EVs), but non-destructively evaluating cell quality issues is not easy. In recent studies, batterie's deformation measurement by optical methods is a promising candidate for detecting a possible local failure originating from mechanical and current inhomogeneities or potential gradients. However, the existing measurement techniques, such as laser scanning and digital image correlation, cannot achieve high-precision deformation measurement up to submicron. In this study, a temporal electronic speckle pattern interferometry (ESPI) is proposed to acquire out-of-plane deformation of both surfaces of a commercial Li-ion polymer battery simultaneously. Various data processing techniques, such as the Fourier and windowed Fourier transform (WFT) methods, are applied in temporal and spatial domains to extract the out-of- displacement during the battery charging process. High-precision deformation of both surfaces can be obtained during the charging process. The result shows that temporal ESPI can be a helpful tool to offer high-precision data for optimizing the Li-ion batteries model.

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Kunhan Yang, Zhipeng Sheng, Bing Chen, Xiaoyu Li, and Yu Fu "Dual-surface li-ion battery deformation measurement by temporal electronic speckle pattern interferometry", Proc. SPIE 12550, International Conference on Optical and Photonic Engineering (icOPEN 2022), 125501S (27 January 2023); https://doi.org/10.1117/12.2667169

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KEYWORDS

Batteries

Deformation

Gaussian filters

Fourier transforms

Phase unwrapping

Safety

Phase shifts

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