Elham Sahraei

TL;DR: In this paper, the authors used LS Dyna numerical simulation and test results for the through-thickness compression, hemispherical punch indentation and confined compression to develop a constitutive model for Li-ion batteries.

TL;DR: In this article, a finite element model was developed, composed of shell elements representing outside casing, and solid elements for the active material with a binder lumped together with the current collectors and the separator.

TL;DR: Three types of lithium ion pouch cells ranging from small consumer electric cells with LiCoO2 cathode to large (electric vehicle size) cells with nanophosphate chemistry were tested under several local and global compression scenarios, and the models successfully predicted the load displacement relation and contour of deformations in the cells.

TL;DR: In this paper, a hybrid experimental/analytical approach was developed for extracting the average mechanical properties of cylindrical Li-ion cells by using the principle of virtual work, and estimating the load transfer mechanism inside the cell, the stress strain relation for the jellyroll was calculated for the case where the cell was crushed between two flat plates.

TL;DR: In this paper, a comprehensive study on the ground impact of lithium-ion battery packs in electric vehicles is presented, where a hypothetic global finite element model is adopted for developing generic methodology, and the force-displacement response of indentation process simulated by the global FE model is cross-validated with the earlier analytical solutions.