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Appl. Sci. 2017, 7(8), 802; doi:10.3390/app7080802

Effects of Vibration on the Electrical Performance of Lithium-Ion Cells Based on Mathematical Statistics

1
National Center for Materials Service Safety, University of Science and Technology Beijing, Beijing 100083, China
2
School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing 100083, China
*
Author to whom correspondence should be addressed.
Received: 20 June 2017 / Revised: 23 July 2017 / Accepted: 5 August 2017 / Published: 7 August 2017
(This article belongs to the Special Issue Solid-State Batteries)
View Full-Text   |   Download PDF [3682 KB, uploaded 7 August 2017]   |  

Abstract

Lithium-ion batteries are increasingly used in mobile applications where mechanical vibrations and shocks are a constant companion. There is evidence both in the academic and industrial communities to suggest that the electrical performance and mechanical properties of the lithium-ion cells of an electric vehicle (EV) are affected by the road-induced vibration. However, only a few studies related to the effects of vibration on the degradation of electrical performance of lithium-ion batteries have been approached. Therefore, this paper aimed to investigate the effects of vibration on the DC resistance, 1C capacity and consistency of NCR18650BE lithium-ion cells. Based on mathematical statistics, the method changes of the DC resistance and the capacity of the cells both before and after the test were analyzed with a large sample size. The results identified that a significant increase in DC resistance was observed as a result of vibration at the 95% confidence level, while typically a reduction in 1C capacity was also noted. In addition, based on a multi-feature quantity, a clustering algorithm was adopted to analyze the effect of vibration on cell consistency; the results show that the cell consistency had deteriorated after the vibration test. View Full-Text
Keywords: lithium-ion battery; vibration load; electrical degradation; mathematical statistic; consistency analysis lithium-ion battery; vibration load; electrical degradation; mathematical statistic; consistency analysis
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Zhang, L.; Ning, Z.; Peng, H.; Mu, Z.; Sun, C. Effects of Vibration on the Electrical Performance of Lithium-Ion Cells Based on Mathematical Statistics. Appl. Sci. 2017, 7, 802.

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