Experimental Characterization of Lithium-Ion Cell Strain Using Laser Sensors

The characterization of thickness change during operation LFP/Graphite prismatic batteries is presented in this work. In regard, current rate dependence, hysteresis behaviour between charge and discharge correlation with phase changes are deepened. Experimental tests carried out a battery testing equipment correlated optical laser sensors to evaluate swelling. Furthermore, computed analytically mathematical model based on lattice parameters the crystal structures active materials. results validated experimental data. Thickness able capture variations internal structure battery, referred as change, characteristic certain state charge. shift ageing. Being these properties mounted external surface cell key feature for improving health estimation management system.