Crushing Behavior of Vehicle Battery Pouch Cell and Module: A Combined Experimental and Theoretical Study

Paper #:
  • 2018-01-1446

Published:
  • 2018-04-03
Abstract:
Lithium-ion (Li-ion) batteries have been considered as the solution for electric vehicles (EV) for the automotive industry due to its lightweight and high energy density. Their mechanical performance is of great importance for electric vehicle crashworthiness design. In this study, quasi-static and dynamic indentation tests were conducted on a commercially available vehicle battery pouch cell to investigate its structural integrity. Three indenters, namely a 3/4 inch diameter flat end (FE), a 1 inch diameter hemispherical (LH) and a 1/2 inch hemispherical diameter (SH) indenters were used to investigate the punch force – deflection responses of the cell. The loading velocity was in the range of 0.06 mm/s to 3 m/s to test the strain rate effect. Simplified closed form analysis solutions were developed to predict the pouch force – deflection response by considering the effect of compression, tension and shear of the battery component materials. A reasonable agreement was obtained between the model prediction and test data. Besides the cell level tests, an additional indentation test was carried out on the battery module with a rigid wedge, to assess the module level damage under large plastic deformation.
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