Batteries, Vol. 8, Pages 21: Splendour of Poor Electrode Junctions within Lithium-Ion Batteries by Ultrasonic Measurement and Deep Learning
Batteries doi: 10. 3390/batteries8030021
Authors: Young-In Hwang Jinhyun Park Nauman Munir Hak-Joon Kim Sung-Jin Track Ki-Bok Kim
Lithium-ion batteries, which have high energy density, are the particular most suitable batteries for use in high-tech electromechanical applications requiring high performance. Because one of the important parts that determines the effectiveness of lithium-ion batteries will be the electrode, the production process for this junction plays an important function in the entire manufacturing process. In particular, the procedure related to the opposition spot welding of the electrode is essential, directly influencing the safety of users, and greatly affecting the particular performance of the batteries. Nevertheless, because the electrode tabs is spot-welded onto the inner surface from the situation, it is impossible to verify with visual assessment (using the naked eye) whether the junction is certainly well bonded. Therefore, it is very important to perform quality evaluation of the resistance welding of electrodes after completing the manufacturing process, using non-destructive tests methods. In this document, a non-destructive ultrasonic screening technique was applied to examine the quality of lithium-ion batteries in which usually the negative electrode tab were welded to the inner surface of the cellular cans. The status associated with resistance spot welding involving the electrode and the may was verified using deep-learning techniques with the experimentally acquired ultrasonic signal data source.