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10 May 2024 Elastic-poroelastic simulation of locally resonant ultrasound inspection for aging li-metal batteries
Erik Frankforter, Matthew Webster, Daniel Perey, Andrew Campbell, Yi Lin
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Proceedings Volume 12951, Health Monitoring of Structural and Biological Systems XVIII; 129510N (2024) https://doi.org/10.1117/12.3011054
Event: SPIE Smart Structures + Nondestructive Evaluation, 2024, Long Beach, California, United States
Abstract
An elastic-poroelastic simulation of ultrasound inspection for lithium-metal batteries is presented and compared to empirical reflection spectra measured during battery cycling. Simulated reflection spectra were obtained using a two-dimensional (2D) plane strain model, comprised of dozens of individual microns-thick layers within a Li-metal pouch cell. The simulated reflection spectra were then compared to ultrasonic reflection spectra measurements taken intermittently during cell cycling. A sensitivity analysis and parameter calibration were performed for the pristine pouch cell simulation prior to cycling, providing a baseline to account for difficult to measure poroelastic material parameters. Then, the reduction in solid Li anode thickness and corresponding growth into a mossy lithium layer was modeled to represent aging conditions. Results from both simulations and empirical inspections show similar trends in through-thickness resonance frequencies due to cell aging.
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Erik Frankforter, Matthew Webster, Daniel Perey, Andrew Campbell, and Yi Lin "Elastic-poroelastic simulation of locally resonant ultrasound inspection for aging li-metal batteries", Proc. SPIE 12951, Health Monitoring of Structural and Biological Systems XVIII, 129510N (10 May 2024); https://doi.org/10.1117/12.3011054
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KEYWORDS
Lithium
Elasticity
Inspection
Batteries
Metals
Ultrasonography
Reflection
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