Optimizing of Discharge Performance through Perforation in Lithium-ion Batteries

The discharge of lithium-ion batteries using perforation has gained attention as an environmentally -friendly alternative to the commonly employed salt water method. In this study, we optimize the discharge method using perforation by identifying the optimal perforation pattern and number. It involves forming perforations that penetrate the lithium-ion battery, resulting in complete discharge without generating wastewater containing hazardous substances. The study is conducted based on four different perforation patterns, and the optimal pattern and number are determined using temperature and residual voltage measurements. The results show that the voltage drop rate remains constant regardless of the type of perforation pattern, and the 1-row pattern exhibits superior results in terms of the heating temperature. This research contributes to the development of an eco-friendly and effective discharge method for lithium-ion batteries using perforation. Furthermore, the voltage drop experiment reveals that there is no significant improvement in the discharge time beyond the eight perforations. Consequently, the optimal number of perforations is determined to be eight.