Effect of Deformation on Safety and Capacity of Li-Ion Batteries

Deformations in lithium-ion batteries, which may lead to thermal runaway, can occur during storage and transportation handling, as well road use. In this study, both radial axial compression deformation were produced experimentally analyze their influence on the performance safety of batteries. plate experiment, battery was loaded different displacements then charge–discharge cycles performed. It found that greater battery, smaller initial capacity faster decay. Under loading, voltage low state charge (SOCs) batteries showed a clear step-drop phenomenon. The compressed until first drop, loading stopped, gradually dropped 0 V. For high-SOC there almost no step-down, small could cause runaway battery. results direction only reduced but had little impact its safety, whereas more likely an internal short circuit (ISC).