Regeneration system and method for positive plate of lithium-ion battery

Abstract

The invention discloses a regeneration system and method for a positive plate of a lithium-ion battery. The regeneration system comprises a blade crusher, an aluminum separation tank, a reduction roasting segment, a lithium separation tank, an acid dissolving tank, an electrolytic temporary storage tank and an electrolytic tank which are sequentially connected. According to the regeneration method, further separation of three elements, namely nickel, cobalt and manganese in the positive plate of the lithium-ion battery is achieved by using the regeneration system through the processes, such ascrushing, aluminum separation, reduction roasting, lithium separation, acid dissolving and electrolysis in sequence, wherein the cobalt is filtered and separated in a form of a Co3O4 sediment, the nickel is taken down from a negative plate in a form of metal nickel and the manganese is evaporatively crystallized and recovered from remaining electrolyte in a form of manganese sulfate. The regeneration system and method are high in automation degree and suitable for massive production; the system is totally enclosed, and is low in harm to the environment and human body; complete regeneration ofthe battery material is achieved and the recovery benefit is high; and nickel-cobalt-manganese metal separation is achieved through a treatment process without an extraction agent and only electric energy is consumed, so that the process is environment-friendly.

Description

technical field [0001] The invention belongs to the fields of resource recycling and non-ferrous metal recycling, and in particular relates to a lithium-ion battery positive plate regeneration system and a method thereof. Background technique [0002] With its excellent energy density and stable safety, lithium-ion batteries have greatly promoted the progress of the green new energy industry. Many manufacturers have gradually extended their applications from the 3C electronics field to the automotive field. With the promotion of the country, many electric buses can already be seen on the road. According to the statistics of relevant experts, by around 2020, the accumulative amount of power batteries scrapped for pure electric (including plug-in) passenger cars and hybrid passenger cars in my country will reach 120,000-170,000 tons. Lithium-ion batteries are mostly composed of battery caps, battery cases, positive electrodes, negative electrodes, electrolytes, and battery se...

AI Technical Summary

Problems solved by technology

The process is complicated, the efficiency is low, and the use of a large amount of acid and alkali and extractant causes a large amount of secondary pollution

With the current treatment technology, the cost of these waste liquid treatment alone is enough to offset a large part of the income generated by battery metal recycling. Our country still needs more investment and research and development in these areas

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