期刊
JOURNAL OF ENERGY STORAGE
卷 50, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.est.2022.104585
关键词
Lithium-ion battery; Ultrasonic resonance; Characterisation; Layer structure; State of charge
资金
- Imperial College Research Fellowship Scheme [104427]
- N.K. Innovate UK through the WIZer project
This work presents a simple and powerful non-destructive characterization technique based on ultrasonic resonance formed by the repetitive layers within lithium-ion batteries (LIBs). By developing a physical model, the method provides important information about the inner structure of LIBs and enables quantitative tracking of internal cell properties.
Lithium-ion batteries (LIBs) are becoming an important energy storage solution to achieve carbon neutrality, but it remains challenging to characterise their internal states for the assurance of performance, durability and safety. This work reports a simple but powerful non-destructive characterisation technique, based on the for-mation of ultrasonic resonance from the repetitive layers within LIBs. A physical model is developed from the ground up, to interpret the results from standard experimental ultrasonic measurement setups. As output, the method delivers a range of critical pieces of information about the inner structure of LIBs, such as the number of layers, the average thicknesses of electrodes, the image of internal layers, and the states of charge variations across individual layers. This enables the quantitative tracking of internal cell properties, potentially providing new means of quality control during production processes, and tracking the states of health and charge during operation.
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