The Use of UL 1642 Impact Testing for Li-ion Pouch Cells

The industry demand for high-capacity cells with a small footprint is a result of demands for improved products and new applications. However, this presents challenges in terms of safety. While standards, such as UL 1642, have been developed for battery safety assessment, including impact testing, this paper shows that cell manufacturers are facing difficulties with UL 1642 safety tests. This is leading to alterations in the test procedures, where ‘golden samples’ are tested, while production cells cannot pass the safety tests. This is a flaw in the process that is being accepted by UL. This paper reviews the UL 1642 standard and similar standards used in portable electronics, provides experimental support for the concerns, and presents recommendations.

[1]  Wei Zhao,et al.  Modeling Nail Penetration Process in Large-Format Li-Ion Cells , 2015 .

[2]  Qing Zhou,et al.  Failure behaviours of 100% SOC lithium-ion battery modules under different impact loading conditions , 2017 .

[3]  P. Ramadass,et al.  Study of internal short in a Li-ion cell-II. Numerical investigation using a 3D electrochemical-thermal model , 2014 .

[4]  Shriram Santhanagopalan,et al.  Dynamic mechanical behavior of lithium-ion pouch cells subjected to high-velocity impact , 2019, Composite Structures.

[5]  Elham Sahraei,et al.  Li-ion Battery Separators, Mechanical Integrity and Failure Mechanisms Leading to Soft and Hard Internal Shorts , 2016, Scientific Reports.

[6]  Tomasz Wierzbicki,et al.  Dynamic impact tests on lithium-ion cells , 2017 .

[7]  Elham Sahraei,et al.  Microscale failure mechanisms leading to internal short circuit in Li-ion batteries under complex loading scenarios , 2016 .

[8]  Wenqian Hao,et al.  The indentation analysis triggering internal short circuit of lithium‐ion pouch battery based on shape function theory , 2018 .

[9]  Christopher J. Orendorff,et al.  Evaluation of mechanical abuse techniques in lithium ion batteries , 2014 .

[10]  Tomasz Wierzbicki,et al.  Failure in lithium-ion batteries under transverse indentation loading , 2018, Journal of Power Sources.

[11]  Chen Li,et al.  Failure statistics for commercial lithium ion batteries: A study of 24 pouch cells , 2017 .

[12]  Eric Darcy,et al.  Modelling and experiments to identify high-risk failure scenarios for testing the safety of lithium-ion cells , 2019, Journal of Power Sources.

[13]  B. Liu,et al.  Coupling Effect of State-of-Health and State-of-Charge on the Mechanical Integrity of Lithium-Ion Batteries , 2018 .

[14]  T. Wierzbicki,et al.  Homogenized mechanical properties for the jellyroll of cylindrical Lithium-ion cells , 2013 .

[15]  Michael Pecht,et al.  A failure modes, mechanisms, and effects analysis (FMMEA) of lithium-ion batteries , 2015 .

[16]  Wei Li,et al.  Comparative study of mechanical-electrical-thermal responses of pouch, cylindrical, and prismatic lithium-ion cells under mechanical abuse , 2018, Science China Technological Sciences.

[17]  Yong Xia,et al.  Mechanical damage in a lithium-ion pouch cell under indentation loads , 2017 .

[18]  Feixiang Wu,et al.  Li-ion battery materials: present and future , 2015 .

[19]  P. Van den Bossche,et al.  A review of international abuse testing standards and regulations for lithium ion batteries in electric and hybrid electric vehicles , 2018 .

[20]  T. Wierzbicki,et al.  Characterizing and modeling mechanical properties and onset of short circuit for three types of lithium-ion pouch cells , 2014 .

[21]  T. Wierzbicki,et al.  Calibration and finite element simulation of pouch lithium-ion batteries for mechanical integrity , 2012 .

[22]  Sergiy Kalnaus,et al.  Mechanical behavior and failure mechanisms of Li-ion battery separators , 2017 .