Lithium ion batteries are known for their cleanliness and energy densityHigh and good cycling performanceWide range of advantagesApplied to our daily lives. Especially in recent years,The rapid development of new energy vehicles and energy storage power stations,The amount of lithium-ion batteries used is beyond imagination. A new energy vehicle integrates thousands of batteries, weighing hundreds of kilograms. When a huge amount of batteries are concentrated together, safety issues are particularly important. In recent years, lithium battery electric vehicles, automobiles, and energy storage power stations have all experienced combustion and explosion accidents. Therefore, research on the quality and safety of lithium batteries has been increasingly valued, and higher requirements have been put forward for the quality inspection technology of lithium batteries, including positive and negative electrode materials, separators, copper foil, aluminum foil, and even outer packaging materials.