A Characteristic of the Thermal Runaway with Defects from Manufacturing process of the Lithium-ion batteries

The initial defect or performance deviation of the produced lithium-ion battery can be easily identified, but identifying a cell with a potential problem is a challenging study. A potential defect affects the performance and safety of the cell in the process of using. The batteries are applying to the varying application field requiring high capacity and power performance, many numbers of cell are connected in series and parallel for the system needs, wherein the problem of individual cells directly affects the performance and stability of the system. In other words, it is very important to understand the behavior characteristics of a potential cell to ensure the performance reliability and stability of the battery system. This research understood the potential thermal runaway (TR) behavior characteristics of cell through a TR experiment with pouch cell, which was manufactured by reproducing potential cell failure, and derived characteristics to identify and isolate failure cell.