Processing Technology of Waste Lithium Batteries

Lithium batteries have been widely used in mobile phones, notebook computers and electric vehicles due to their high energy density, long cycle life, no memory effect, high rated voltage, low self-discharge rate, and no toxic heavy metals. The development direction of the battery in the future. At the same time, with the rapid promotion of electric vehicles and the rapid development of electronic products, the market demand for lithium batteries has increased significantly, and the social and environmental problems caused by waste lithium batteries have become increasingly prominent. The effective recycling of rare metals such as cobalt, nickel and lithium has gradually become the focus of research at home and abroad.

If these waste lithium batteries are not disposed of properly, the organic fluorine-containing electrolytes and metals in the batteries will cause harm to the environment, and non-ferrous metals such as cobalt, lithium, nickel, and copper in waste lithium batteries are important resources with extremely high recycling rates. Utilization value. Therefore, the recycling of used lithium batteries has high economic and environmental protection value.

Lithium battery recycling process flow chart

At present, the treatment technology of waste lithium batteries is becoming more and more mature. The combined use of various process equipment and the direct regeneration of cathode materials will become the development trend of lithium battery treatment in the future. At the same time, the composite treatment characterized by low energy consumption, less pollution and easy operation Technology has become the main development direction. The process technology for recycling waste lithium batteries is as follows:

Dismantling: first disassemble the whole group of used lithium batteries into individual batteries.

Discharge: Disassembled waste lithium iron phosphate batteries must be discharged to prevent fire during operation.

Crushing: The discharged lithium battery is sent to the battery shredder through the closed conveying device for shredding, and then the secondary shredding is carried out.

Magnetic separation: the crushed material enters the magnetic separator to separate out the iron, the magnetically separated material is sent to the negative pressure air separator through a closed conveying system, and the material in the material is collected and sorted by weight, such as copper The mixture with the aluminum-plastic shell is a heavy object, and the remaining positive and negative materials, plastic diaphragms and other mixtures are considered light materials.

Sorting: The copper-aluminum mixture can be sorted from the sorting machine, copper and aluminum can be sorted by the airflow specific gravity sorting machine, and the stainless steel and plastic shell mixture can be sorted by the airflow specific gravity sorting.

Analysis machine: The sorted materials can enter the cyclone collector through negative pressure, and then collect the positive and negative points through the fan collection process to collect the positive and negative points.

From the perspective of the industry background, the industrial development of ternary lithium battery dismantling equipment and lithium battery recycling equipment is a realistic problem. Now the production of new waste products such as power batteries and photovoltaic modules has increased significantly, and the difficulty of recycling and dismantling is not difficult. Large, lithium battery recycling equipment is a recyclable metal quality that can meet the key material requirements of strategic emerging industries, high-quality recycling capacity, and provide resource guarantee for sustainable economic and social development, ternary lithium battery dismantling equipment, lithium The technology of battery recycling equipment is embodied in a green circular development system, which promotes the large-scale, standardized and clean utilization of renewable resources, and promotes the agglomeration and development of renewable resources production industries.