Dynamic Mechanical Compression Impulse of Lithium-Ion Pouch Cells

Abstract

Strain rate sensitivity has been widely recognized as a significant feature of the dynamic mechanical properties of lithium-ion cells, which are important for their accurate representation in automotive crash simulations. This research sought to improve the precision with which dynamic mechanical properties can be determined from drop tower impact testing through the use of a diaphragm to minimize transient shock loads and to constrain off-axis motion of the indenter, specialized impact absorbers to reduce noise, and observation of displacement with a high speed camera. Inert pouch cells showed strain rate sensitivity in an increased stiffness during impact tests that was consistent with the poromechanical interaction of the porous structure of the jellyroll with the liquid electrolyte. The impact behaviour of the inert pouch cells was similar to that of an Expanded Polypropylene foam (EPP), with the exception that the inert pouch cells did not show hysteretic recovery under the weight of the indenter. This suggests that the dynamic mechanical behaviour of the inert pouch cells is analogous to a highly damped foam.

Organic/inorganic double solutions for magnesium–air batteries

“…has good alkali resistibility, chemical stability, and high air permeability. 29,30 The Mg-6 wt% Al sample with an exposed area of 1 cm 2 acted as the anode. The commercial air cathode with the MnO 2 catalyst was purchased (Changzhou Youteke New Energy Science and Technology, LTD, China).…”

Performance Analysis of Indentation Punch on High Energy Lithium Pouch Cells and Simulated Model Improvement

“…As soon as the large format pouch cells were subjected to indentation leading to failure, an examination of failure regions demonstrated a fracture surface angle to the battery plane [64,65]. The research combined both experimental and computational studies [66,67]. Dynamic finite element simulations were performed to study pouch cells' mechanical behavior, such as internal interfacial behavior, loading, and boundary conditions, which shows a direct interaction between cell boundaries and impactor leading to the significant change in the residual velocity [68,69].…”

PEI-SiO2 composite membranes with high thermal stability: Synthesis by self-assembled in situ growth and application in lithium-ion batteries

“…The storage and use of renewable energy must be considered while developing chemical power sources. [1][2][3][4][5] Among different chemical power systems, lithium-ion batteries (LIBs) have emerged as the most popular energy storage system because of their high energy density and long cycle life. [6][7][8] In LIBs, the role of membranes is to isolate the anode from the cathode to avoid short circuits by direct contact between the two electrodes.…”