A method for recycling copper, aluminum and rubber in waste power lithium batteries

Abstract

The invention discloses a method for recycling copper aluminum and rubber in a waste power lithium battery. The method is characterized by comprising the following steps of 1) disassembly: disassembling a waste power battery pack to obtain a battery unit; 2) crushing and granulation: conducting one-stage crushing and two-stage granulation through an ultra-fine grinding granulator on the battery unit to obtain a product A; 3) screening: screening the product A through a screening device to obtain 100-160-mesh anode and cathode powder under the screening device and a 100-160-mesh product B on the screening device; 4) magnetite induced gravity separation: conducting the magnetite induced gravity separation on the product B first to obtain pure rubber particles and a copper-aluminum mixture and conducting the second magnetite induced gravity separation on the copper-aluminum mixture to obtain pure copper particles and aluminum particles. The ultra-fine high-purity magnetite induced gravityseparation technology is adopted to better recycle the copper-aluminum and the rubber in the waste power lithium battery, and the obtained copper and aluminum and the rubber have low mutual content.

Description

technical field [0001] The invention relates to a method for recycling lithium batteries, in particular to a method for recycling copper, aluminum and rubber in waste power lithium batteries. Background technique [0002] In recent years, with the guidance of domestic policies on new energy vehicles, the sales volume of new energy vehicles in my country has been greatly improved. In 2017, the cumulative total sales of new energy vehicles in my country reached 777,000 units, a year-on-year increase of 53%. Among them, the cumulative annual sales volume of pure electric vehicles was 652,000, and that of plug-in hybrid vehicles was 125,000. Domestic sales of new energy vehicles are expected to exceed 2 million units in 2020, and the year-on-year growth rate of future sales will exceed 40%. At present, my country's new energy vehicles mostly use ternary lithium batteries, lithium iron phosphate, etc. as power batteries. Due to cyclic charging and discharging, their battery capa...

AI Technical Summary

Problems solved by technology

For waste power lithium batteries, the copper foil and aluminum foil in the positive and negative electrodes and the rubber particles used for packaging are currently sorted by air separation and electric separation after crushing. The disadvantage of this sorting method is that Copper-aluminum products contain a lot of each other, the purity of the product is reduced, and the sales value of the product is also reduced

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