Battery testing and modeling have gained much attention in the industries of consumer electronics and electric vehicles (EVs). Automotive 18650 lithium-ion batteries used in electric vehicles were studied through mechanical testing, material characterization, constitutive modeling & validation, FE modeling & simulation to investigate the mechanical integrity under abusive loading; and the root cause of short-circuit. The effects of strain rate and state of charge (SOC) were also coupled into the FE analysis.
This project was sponsored by Jaguar Land Rover.
Test Platform
Test Load Cases
Three typical load cases were chosen to obtain testing data from 18650 cells: indentation, three-point bending and radial compression. The force-displacement and electric current history was recorded to investigate both mechanical and electric behaviors under abuse load cases.
FE Modeling
Johnson-Cook constitutive model was used for material characterization.
Model Validation & Correlation
CAE results are validated and compared with test data with high correlation.
Zheng Li 
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