Lithium-ion batteries have the characteristics of light weight, large energy storage, high power, and no pollution. They are more and more widely used in various fields, and great progress has been made in their research and production. The use of lithium-ion batteries as a power source in electric vehicles has become a new trend in the development of electric vehicles.
The advancement of lithium-ion battery technology and its application in key emerging markets (electric vehicles) have stimulated a global R&D boom. Therefore, lithium-ion batteries are bound to occupy an important position in the fields of electric vehicles and new energy. At present, the most widely used lithium-ion battery in electric vehicles is lithium iron phosphate battery, which has good thermal stability and safety, and is relatively cheap. These factors make lithium iron phosphate batteries the first choice for small electric vehicles and PHEV power batteries. However, among lithium-ion batteries, the specific energy, specific power and operating voltage of lithium phosphate batteries are relatively low, and lithium cobalt oxide and lithium manganate batteries have more advantages in large-scale pure electric vehicle applications.
However, there are also some problems with the wide application of lithium battery electric vehicles, mainly due to the performance limitations of lithium batteries, including the safety, cycle life, cost, operating temperature and material supply of lithium ion batteries, etc.
