Electrochemical and Material Characterisation of Lithium Ion Cell Components Subjected to Mechanical Abuse 2019-26-0126
Analysis of Lithium-ion Battery by X-Ray Tomography Technique and Metallurgical Characterization
P K Ajeet Babu, Asmita S Waghmare, Suhail M Mulla, Ojas Bangal, U S Karle and M R Saraf
Lithium-ion batteries with high energy density are one of the prime energy sources for an Electric vehicle. The life of electric vehicles is eight to ten years and during its life term the battery being used is expected to be in safe operating condition. The quality of battery with respect to its manufacturing and assembly of each component is important with respect to battery safety. This paper investigates lithium ion cell in new and damaged conditions. 3D morphological evolution of each component of the battery i.e. Cathode, anode and collector along with the analysis of the battery assembly is studied in detail using X-Ray tomography technique. The high quality images showed various surface imperfections such as crack in the new cell cathode and anode. The tab welding of the various cells were also studied in detail. The cells Composition analysis is studied by Scanning Electron Microscopy (SEM) and phase identification is carried out by X-Ray Diffraction (XRD) technique. The CT images were used to identify the different components in each configuration as well as to evaluate the corresponding pore, particle size distribution. The results are further complimented by metallurgical Characterization of cell by SEM and XRD techniques which are found to be effective for detailed material study of various cells. It is envisaged that the use of these techniques will lead to major advancement in the analysis of Li-ion batteries without destruction. The use of X-ray CT has been shown to be valuable tool for the post-mortem analysis of battery as result of cell failure.
Ojas Bangal, Vikash Chaturvedi
ARAI, CSIR-National Chemical Laboratory
Symposium on International Automotive Technology 2019