IEEE Access, Vol. 7, pp. 45978-45982, April 3, 2019, DOI:10.1109/ACCESS.2019.2909018

The Explosive Nature of Tab Burrs in Li-Ion Batteries


Xing-Yan Yao 1,2, Saurabh Saxena 1, Lei Su 3, and Michael Pecht 1
1 CALCE, Center for Advanced Life Cycle Engineering, Department of Mechanical Engineering, University of Maryland, College Park, Maryland 20740, USA
2 School of Computer Science and Information Engineering, Chongqing Technology and Business University, Chongqing 400067, China
3 Jiangsu Key Laboratory of Advanced Food Manufacturing Equipment and Technology, Jiangnan University, Wuxi 214122, China

Abstract:

Lithium-ion battery fires and explosions in various battery-operated products have raised safety concerns. While external abuse of batteries can cause fires and explosions, most of the reported problems arose from internal battery defects, which are often difficult to detect. One particular and significant defect pertains to burrs on the tab used to connect the anode and cathode layers to the external terminals of the battery. This paper investigates burr-related issues, presents a case wherein a burr most likely caused thermal runaway in a battery and overviews the standard associated with burr control and the application of computed tomography scanning to assess the risks.

This article is available online here.

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