Lithium-Ion Battery Thermal Behavior and Safety in Simulated Scenarios
This work focuses on the experimental testing of various methods to characterize the thermal behavior of different module configurations and determine safe practices in lithium-ion battery module design. This testing consists of a modified oven test where a single cell in modules of various configurations is artificially stimulated to trigger thermal runaway via a heating element. The thermal behavior of the surrounding cells is analyzed to determine the performance of the propagation mitigation methods.
Results have shown that increasing the inter-cell spacing beyond that of typical module layouts significantly decreases the probability of thermal propagation to adjacent cells of the cylindrical variety, as shown in Figure 1. The data gathered from these modified oven tests are utilized in coupled electrochemical-thermal simulations that model the various high-temperature side reactions to predict the thermal response for a given configuration [5-7]. It is expected that this model will permit potential pathways toward determining safe battery module configurations.
 T. D. Hatchard, D. D. MacNeil, A. Basu, J. R. Dahn, Thermal Model of Cylindrical and Prismatic Lithium-Ion Cells, J. Electrochem. Soc. 148, (2001)
 P. Peng, Y. Sun, F. Jiang, Thermal Analysis of LiCoO2Lithium-Ion Battery during Oven Tests, J. Heat and Mass Transfer, 50, (2014)
 J. Jeevarajan, B. Strangways, and T. Nelson, Performance and Safety Evaluation of High-rate 18650 Lithium-Iron-Phosphate Cells, NASA Battery Workshop, November 2009
 J. Jeevarajan, Validation of Battery Safety for Space Missions, NASA – Johnson Space Center, February 7th, 2012.
 M. Doyle, T. F. Fuller, and J. Newman, Modeling of Galvanostatic Charge and Discharge of the Lithium/Polymer/Insertion Cell, J. Electrochem. Soc., 140, 1526 (1993)
 W. B. Gu and C. Y. Wang, Thermal‐Electrochemical Modeling of Battery Systems, J. Electrochem. Soc., 147, 2910 (2000)
 G. H. Kim, K. Smith, K. J. Lee, S. Santhanagopalan, A. Pesaran, Multi-Domain Modeling of Lithium-Ion Batteries Encompassing Multi-Physics in Varied Length Scales, J. Electrochem. Soc., 158, 955 (2011)