In the transition period from internal combustion engine to electric drive system, companies that produce high-efficiency batteries are very important. This is closely related to extending the driving distance of electric vehicles. Due to the global demand for electric vehicle batteries, LG Chem, Samsung SDI and electric vehicle battery manufacturer SK Innovation are rising. The most famous time in China is the Ningde era. With the coming trend of electric vehicles, they have risen rapidly in a short time.(Lithium