Recycling method and recycling device for cathode material and anode material of spent lithium-ion battery

Abstract

The invention discloses a recycling method and a recycling device for a cathode material and an anode material of a spent lithium-ion battery. The recycling method comprises the following steps: discharging the spent lithium-ion battery; removing a shell; crushing an inner core of the battery into broken pieces of 2 to 4 cm; immersing the broken pieces into a polar solvent system; stirring for 2 to 10 minutes with the assistance of mechanical stirring to separate and recycle the cathode material, the anode material, diaphragms, foil materials and the like. The recycling device comprises a separation system, a filtering system and a solvent cyclic utilization system. The recycling method and the recycling device are easy to operate; the cathode material and the anode material can be recycled simultaneously; the operating processes are reduced; the work efficiency is improved; the separation effect is good; the filtered solvent can be reutilized directly; the recycling method and the recycling device are environment-friendly; the recycling cost is reduced.

Description

technical field [0001] The invention relates to a recovery method and recovery device for positive and negative electrode materials of waste lithium ion batteries. Background technique [0002] Compared with nickel-cadmium batteries and nickel-metal hydride batteries, lithium-ion batteries have the advantages of small size, light weight, high energy density, no memory effect, small self-discharge, and long life. They not only dominate the small portable electronic product market, but also have been widely used Applied in the fields of electric vehicles and hybrid electric vehicles. It is expected that the output of lithium-ion batteries will continue to increase with the development of electric vehicles in the future, and their service life is generally 3 to 5 years. Therefore, there will be a large number of waste lithium-ion batteries in the future, and the recycling of waste lithium-ion batteries has become a an increasingly urgent problem. In the prior art, the recycli...

AI Technical Summary

Problems solved by technology

In the prior art, the recycling methods for waste lithium-ion batteries are mainly aimed at the recovery of positive electrode materials, while the recycling of negative electrode materials is seldom, resulting in waste of negative electrode materials, and most of the recovery of positive electrode materials is from dismantled batteries. In the process, the positive electrode sheet is first separated, and then the positive electrode material is separated from the positive electrode sheet, which increases the process flow, wastes labor, increases recycling costs, and reduces recycling efficiency.

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