A kind of recovery method of power lithium battery

Abstract

The present invention provides a recovery method for power lithium batteries, including the following process flow: S1 pretreatment and primary sorting: pretreating the battery module, and then performing primary sorting on the heavy materials and light materials produced by the pretreatment by air flow; S2 fine treatment and multiple screening: refine the heavy materials after primary separation, and separate them to obtain Fe materials, thick plastics, Al casings, Cu poles, Al foil, Cu foil, Al particles and positive electrode powder ; S3 gas and fine powder treatment: the gas and fine powder generated during the fine treatment process are further processed, and the black powder is collected, and the gas is discharged after treatment. The whole process of the present invention is mechanized operation without manual participation, and the positive and negative electrode materials of the obtained powder product are completely distinguished, and do not contain Cu and Al impurities. The electrolyte and other organic matter and exhaust gas inside the battery cell are all processed, which will not cause secondary pollution to the environment.

Description

technical field [0001] The invention relates to the technical field of recycling waste lithium batteries for decommissioning new energy vehicles, in particular to a method for recycling power lithium batteries. Background technique [0002] In 2018, my country's power lithium battery ushered in the first wave of decommissioning peak, and the theoretical decommissioning volume will reach 6.6GWh. Judging from the sales of new energy vehicles over the years, the theoretical decommissioning volume of power lithium batteries will reach 32GWh by 2020; it is estimated that by 2030, the theoretical decommissioning volume of power lithium batteries will reach 101GWh, with a weight of about 1.56 million tons. The power lithium battery is composed of positive electrode, negative electrode, separator and electrolyte. Taking the ternary battery as an example, the positive electrode material on the positive electrode sheet contains Ni, Co, Li and Mn and other metal elements; the negative ...

AI Technical Summary

Problems solved by technology

[0005] The present invention is dedicated to solving the problems existing in the existing waste lithium battery recycling process, crushing the lithium battery module after discharge, eliminating the need for module dismantling, reducing manual participation, orderly separating impurities such as diaphragms and plastics, and adopting physical methods to advance Recycle negative electrode materials, avoid mixing and finely crushing positive and negative electrode materials, realize all materials should be collected, and increase the recovery rate of positive electrode materials

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