Recycling methods for power lithium batteries and dismantling and recycling technologies

Recycling methods of power lithium batteries The recycling of power lithium batteries mainly includes two methods, namely, scrapping and dismantling and echelon utilization. The current policy guidance is to encourage cascading use first, then dismantling and recycling, in order to fully utilize the economic benefits of used batteries. However, due to the uniformity and cost of the battery, the current cascade utilization is relatively small. 1. Echelon utilization is aimed at batteries that have decayed to be unable to be used normally in new energy vehicles. These batteries themselves are not scrapped and can be used continuously. Although it cannot be used continuously in automobiles, it can be reused in other ways. Echelon use can extend the service life of the battery and reduce the cost of battery processing. 2. Disassembly and utilization is to analyze the battery, extract the important metal components, and recycle these metal components. This approach has played a great role in resource protection, and can also avoid the risk of raw material price changes and effectively reduce battery processing costs. At present, the recycling of power lithium batteries is basically achieved through scrapping and dismantling. The process of dismantling and dismantling the power lithium battery is: discharging, dismantling the battery system, disassembling the battery module, battery pack resolution and material purification, so as to realize the transformation from the waste power lithium battery system to the reusable high-purity lithium salt and high-purity Transition metal transformation. The core link of lithium battery recycling lies in battery pack solution and material extraction, the purification of metal elements in waste power lithium batteries, and the processing of raw materials required for reusable power lithium batteries. Dismantling and recycling technology of power lithium batteries The dismantling and recycling of power lithium batteries is currently focused on the recovery of positive electrode materials. The recycling methods include dry recycling, wet recycling and biological recycling technologies. 1. Dry recycling means that the use of mechanical sorting and high-temperature pyrolysis is used to achieve the recycling of various battery materials or valuable metals, but it is clear that it is easy to cause secondary pollution and high energy consumption, which is not in line with the state. Environmental protection policies for energy saving and emission reduction. 2. The hydrometallurgical method is a solution process of breaking and sorting lithium batteries, dissolving and leaching, and separating and recycling. The advantage of this method is that the product purity is high, there are many chemical reaction options, and the requirements for operation and equipment are low. However, the disadvantage is that the reaction speed is slow, the process is complicated, and the cost is relatively high. 3. Bio-recovery technology is mainly to use microbial leaching to convert the useful components of the system into soluble compounds and selectively dissolve them, to achieve a high separation of target components and impurity components, and finally to recover valuable lithium, cobalt, nickel, etc. Metal, but it is difficult to cultivate microorganisms and fungi, and the requirements for the leaching environment are high. As lithium resources may recover lithium salt from waste lithium batteries in the future, it has also become a hot spot for some industry insiders. It is predicted that by 2050, the global demand for lithium metal will reach 40 million tons, and the current global metal lithium resources are up to 30 million tons, and only 15 million tons of lithium mineral resources have been proven to be exploitable. There are huge vacancies in the space. Recycling lithium batteries is, to a certain extent, an unsuspecting resource vacancy in the future. Disclaimer: Some pictures and content of articles published on this site are from the Internet, please contact to delete if there is any infringement. Previous: Analysis of the hazards of used lithium batteries