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Process for treating wasted lithium cells

A waste lithium battery and process method technology, which is applied in the field of waste lithium battery treatment, can solve problems such as high cost, difficult control conditions, and unsatisfactory separation effect

Inactive Publication Date: 2011-04-06
苏州群瑞环保科技有限公司
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Problems solved by technology

The treatment of cobalt-lithium film is to realize the separation of cobalt, aluminum and acetylene black. The separation of cobalt and acetylene black in the existing treatment methods is relatively successful, but the separation effect of cobalt and aluminum is not ideal, and the separation process is complicated and the conditions are relatively poor. Difficult to control and high cost

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  • Process for treating wasted lithium cells
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Embodiment Construction

[0016] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, so as to define the protection scope of the present invention more clearly.

[0017] Such as figure 1 Shown is a flow diagram of an embodiment of the invention. The invention discloses a process method for treating waste lithium batteries. The treatment process includes the following steps:

[0018] 1) Separate the recycled waste batteries, and directly recycle and package the negative electrode materials and steel shells, and sell them as raw materials;

[0019] 2) Dissolve and clarify the separated cobalt-lithium film with NMP solvent, re-dissolve the clear liquid, wash and dry the separated aluminum foil and sell it, and distill the clear liquid to obtain distillate, lithium cobaltate powder, acetylene black powder, an...

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Abstract

The invention discloses a process for treating wasted lithium cells, comprising the following steps of: (1) separating recycled wasted cells, wherein negative electrode materials and steel shells are directly recycled and packed to be used raw materials for sale; (2) dissolving cobalt-lithium membranes obtained from separation with an NMP (N-methyl-2-pyrrolidone) solvent, clarifying, redissolving clear liquid, and washing separated aluminum foils with water and drying for sale; (3) carrying out water washing, filtering, drying and leaching on lithium cobaltite slag to obtain a cobalt solution; and (4) further complexing and precipitating the cobalt solution to obtain B-Co(OH)2. The invention has the advantages that the inorganic solvent is adopted for dissolving a binder PVDF (Polyvinylidene Fluoride) of the lithium cobaltite to enable the lithium cobaltite to fall off from the aluminum foil, and the elementary aluminum foils are directly recycled without the performing of cobalt-aluminum separation in the traditional lithium cell recycling process, therefore, the whole recycling process of wasted lithium cells is simplified and recycled products are increased.

Description

technical field [0001] The invention relates to a method for treating waste lithium batteries, in particular to a process method for treating waste lithium batteries by using an organic solvent to dissolve lithium cobaltate. Background technique [0002] Lithium-ion battery is the rechargeable chemical battery with the best technical performance in the world. It has the advantages of high working voltage, large specific energy, long cycle life, small self-discharge, no memory effect, and no pollution. It is widely used in mobile communications, notebooks, etc. Computers, portable tools, electric bicycles and other fields. In 2006, the world's total output of lithium-ion batteries exceeded 2.5 billion. At present, the global lithium secondary battery market is mainly concentrated in mobile communications and notebook computers. Domestic mobile users have exceeded 200 million, ranking first in the world, and the consumption of lithium batteries is huge. , The consumption of n...

Claims

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Application Information

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IPC IPC(8): H01M10/54
CPCY02E60/12Y02W30/84
Inventor 方伟清
Owner 苏州群瑞环保科技有限公司
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