Jeong-Chay Jeon

Diagnosis of Electrochemical Degradation in a Large-Format NCM Pouch Cell under Over-Discharge Using EIS and Acoustic Emission

Over-discharge of large-format lithium-ion cells can cause electrochemical and mechanical degradation, leading to safety concerns. This study investigated a 67 Ah NCM pouch cell using electrochemical impedance spectroscopy (EIS), acoustic emission (AE), and X-ray computed tomogra...

Analysis of Fire Accident Mechanisms and Protection Improvements in Outdoor Grid-Connected PV PCS

The increasing deployment of photovoltaic (PV) generation has raised concerns regarding the fire safety of outdoor power conversion systems (PCS). This study investigates a fire accident involving a 250kW grid-connected PV PCS through field inspection, event analysis, damaged com...