Issue 32, 2020

A gradient screening approach for retired lithium-ion batteries based on X-ray computed tomography images

Abstract

Accurate and efficient screening of retired lithium-ion batteries from electric vehicles is crucial to guarantee reliable secondary applications such as in energy storage, electric bicycles, and smart grids. However, conventional electrochemical screening methods typically involve a charge/discharge process and usually take hours to measure critical parameters such as capacity, resistance, and voltage. To address this issue of low efficiency for battery screening, scanned X-ray Computed Tomography (CT) cross-sectional images in combination with a computational image recognition algorithm have been employed to explore the gradient screening of these retired batteries. Based on the Structural Similarity Index Measure (SSIM) algorithm with 2000 CT images per battery, the calculated CT scores are closely correlated with their internal resistance and capacity, indicating the feasibility of CT scores to sort retired batteries. We find out that when the CT scores are larger than 0.65, there is high potential for a secondary application. Therefore, this pioneering and non-destructive CT score method can reflect the internal electrochemical properties of these retired batteries, which could potentially expedite the battery reuse industry for a sustainable energy future.

Graphical abstract: A gradient screening approach for retired lithium-ion batteries based on X-ray computed tomography images

Supplementary files

Article information

Article type
Paper
Submitted
22 apr 2020
Accepted
12 mai 2020
First published
20 mai 2020
This article is Open Access
Creative Commons BY-NC license

RSC Adv., 2020,10, 19117-19123

A gradient screening approach for retired lithium-ion batteries based on X-ray computed tomography images

A. Ran, S. Chen, S. Zhang, S. Liu, Z. Zhou, P. Nie, K. Qian, L. Fang, S. Zhao, B. Li, F. Kang, X. Zhou, H. Sun, X. Zhang and G. Wei, RSC Adv., 2020, 10, 19117 DOI: 10.1039/D0RA03602A

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