In general, when it comes to decommissioned lithium iron phosphate batteries from electric vehicles, they often retain approximately 80% of their capacity. Even when they reach the lower limit of 60% scrap capacity, there is still 20% capacity remaining, which can be effectively utilized for applications that require less power than automotive requirements. Some examples include low-speed electric vehicles and communication base stations. This enables a cascade utilization of waste batteries, ensuring their value is not wasted.
Retired lithium iron phosphate batteries from cars still possess a significant utilization value. The process of cascade utilization for power batteries involves several steps, starting with the enterprise recycling and decommissioning batteries, followed by disassembly, detection, and classification. The batteries are then categorized based on their capacity, enabling battery module reorganization.
At the battery preparation level, the residual energy density of the waste lithium iron phosphate battery can reach approximately 60-90Wh/kg, and its recycling life can reach an impressive 400-1000 cycles. With advancements in battery preparation techniques, the recycling life may even see further improvement. When compared to lead-acid batteries, which have an energy density of around 45Wh/kg and a cycle life of about 500 times, the waste lithium iron phosphate battery clearly holds a performance advantage.
Additionally, the cost of waste lithium iron phosphate batteries is relatively low, ranging between 4000-10000 yuan/ton, making their utilization economically efficient. This further adds to the appeal of harnessing the potential of these batteries in various applications, contributing to both environmental sustainability and cost-effectiveness.