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Energies 2017, 10(5), 591; doi:10.3390/en10050591

In Situ Stress Measurement Techniques on Li-ion Battery Electrodes: A Review

1
Collaborative Innovation Center for Electric Vehicles in Beijing, National Engineering Laboratory for Electric Vehicles, School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China
2
Center for Advanced Life Cycle Engineering (CALCE), University of Maryland, College Park, MD 20742, USA
*
Author to whom correspondence should be addressed.
Academic Editor: Joeri Van Mierlo
Received: 16 March 2017 / Revised: 16 April 2017 / Accepted: 19 April 2017 / Published: 27 April 2017
(This article belongs to the Special Issue Advances in Electric Vehicles and Plug-in Hybrid Vehicles 2017)
View Full-Text   |   Download PDF [2447 KB, uploaded 27 April 2017]   |  

Abstract

Li-ion batteries experience mechanical stress evolution due in part to Li intercalation into and de-intercalation out of the electrodes, ultimately resulting in performance degradation. In situ measurements of electrode stress can be used to analyze stress generation factors, verify mechanical deformation models, and validate degradation mechanisms. They can also be embedded in Li-ion battery management systems when stress sensors are either implanted in electrodes or attached on battery surfaces. This paper reviews in situ measurement methods of electrode stress based on optical principles, including digital image correlation, curvature measurement, and fiber optical sensors. Their experimental setups, principles, and applications are described and contrasted. This literature review summarizes the current status of these stress measurement methods for battery electrodes and discusses recent developments and trends. View Full-Text
Keywords: Li-ion batteries; electrodes; mechanical stress; in situ measurements; review Li-ion batteries; electrodes; mechanical stress; in situ measurements; review
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Cheng, X.; Pecht, M. In Situ Stress Measurement Techniques on Li-ion Battery Electrodes: A Review. Energies 2017, 10, 591.

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