Cascade utilization of lithium iron phosphate battery

Generally speaking, the retired lithium iron phosphate battery of electric vehicles still has nearly 80% of the capacity surplus, and there is still 20% of the capacity from the lower limit of 60% of the total scrapped capacity. It can be used in occasions with lower requirements than automobile electric energy, such as low-speed electric vehicles, communication base stations, etc., to realize the cascade utilization of waste batteries. The lithium iron phosphate battery retired from automobiles still has high utilization value. The cascade utilization process of power batteries is as follows: enterprise recycling retired batteries - disassembly - testing and grading - classification by capacity - battery module restructuring. Under the battery preparation level, the residual energy density of the waste lithium iron phosphate battery can reach 60~90Wh/kg, and the recycling life can reach 400~1000 times. With the improvement of the battery preparation level, the recycling life may further improve. Compared with the lead-acid battery with an energy of 45Wh/kg and a cycle life of about 500 times, the waste lithium iron phosphate battery still has performance advantages. Moreover, the cost of waste lithium iron phosphate battery is low, only 4000~10000 yuan/t, which has high economy.