Lithium-ion power battery is a new type of high-energy battery successfully developed in the 20th century. The negative electrode of this battery is made of graphite and other materials, and the positive electrode is made of lithium iron phosphate, lithium cobalt oxide, lithium titanate, etc. It entered practical use in the 1970s. Due to its high energy, high battery voltage, wide operating temperature range, and long storage life, it has been widely used in military and civilian small electrical appliances.
