Lithium Ion Battery

          From the birth of the first electric vehicle in 1834 to the new energy vehicle playing the leading role in major international auto shows in 2021, the new energy vehicle has gone through a course of nearly 190 years. After nearly two centuries of tortuous development, new energy vehicles have achieved unprecedented breakthroughs in terms of type, technology, and market share. As the core of electric vehicles, batteries dominate the development process of new energy vehicles, and they have received more attention than other components. much attention. The importance of battery safety is increasing day by day, and the control of its production process is becoming more and more important. When there are metal impurities such as iron (Fe), copper (Cu), chromium (Cr), nickel (Ni), zinc (Zn), silver (Ag) in the positive electrode material, the voltage of the battery formation stage reaches the oxidation of these metal elements. After the reduction potential, these metals will be oxidized at the positive electrode and then reduced at the negative electrode. When the metal element at the negative electrode accumulates to a certain extent, the hard edges and corners of the deposited metal will pierce the separator, causing the battery to self-discharge. Self-discharge can have a fatal impact on lithium-ion batteries, so it is particularly important to prevent the introduction of metal foreign matter from the source.

Solution

The extraction process can effectively filter metal and magnetic foreign matter in the material powder, reducing the influence of the powder itself on the results. The analysis system can automatically scan the filtered magnetic foreign objects, and automatically distinguish between metals, non-metals and fibers through the principle of shielding the reflection state of metals by polarizers. Scanned particles were measured for length, width, area, and counted by size.

Scheme configuration

Equipment: JC767 Component Cleanliness Cabinet, JS100 Technical Cleanliness Inspection System.