Detection of Internal Defects in Lithium-Ion Batteries Using Lock-in Thermography

摘要: Effective thermal management is essential for maximising performance and durability of Li-ion batteries. Infrared imaging an established technique studying temperature distribution in real-time with high spatial resolution; however, dynamic offers greater sensitivity, the ability to correct emissivity variation identify heat transfer mechanisms internal defects. Here, first time, lock-in thermography using a camera applied batteries investigate effect periodic electro-thermal stimulation on amplitude phase response both new aged pouch cells. We demonstrate effectiveness this detection gas pockets formed during cell aging propose its application identification range defects operational systems validation models.