Method for recycling available substances on defective cathode piece of lithium battery

Abstract

The invention discloses a method for recycling available substances on a defective cathode piece of a lithium ion battery, which is applied to a lithium ion battery production process and comprises the following steps of: 1, cleaning the cathode piece; 2, performing full stirring and dissolution by using purified water; 3, performing solid-liquid separation; and 4, performing re-washing, mixing a stirring fluid with a washing fluid to obtain a regeneration fluid, performing constituent supplement treatment on the regeneration fluid to obtain recyclable cathode coating slurry, and putting the slurry into production. In the method for recycling the available substances on the defective cathode piece of the lithium ion battery, a purely physical method is adopted to recycle the available substances and metal materials from defective products without producing any scrap; the recycled regeneration fluid is supplemented with various constituents, and can be directly used for the slurry coating of a pole piece of the battery when having the viscosity of normal battery slurry; the recycled metal materials, copper foils, can be sold to related factories and recycled as copper smelting raw materials; all recycled substances can be reutilized; and the method ensures simple operations and complete recycling, and can positively function in reducing the production cost of the battery, saving resources and protecting the environment.

Description

technical field [0001] The invention relates to the production technology of lithium-ion batteries, in particular to a method for recycling and reusing usable substances on defective negative pole pieces of lithium-ion batteries. Background technique [0002] In any production process, defective products are produced. The production of lithium-ion batteries is no exception. In the production process, due to improper operation, uneven coating, partial stripping, and unqualified size, a large number of pole pieces cannot meet the quality requirements and become substandard products. In production, these unqualified products are generally treated as waste, which will cause certain environmental pollution and waste of resources, resulting in an increase in the production cost of lithium batteries, which is very unfavorable for sustainable production. [0003] The treatment of battery waste has always been a big problem. Although there are many treatment methods, they are only f...

AI Technical Summary

Problems solved by technology

The production of lithium-ion batteries is no exception. During production, due to improper operation, uneven coating, partial stripping, unqualified size and other reasons, a large number of pole pieces cannot meet the quality requirements and become substandard products.

In production, these unqualified products are generally treated as waste, which will cause certain environmental pollution and waste of resources, resulting in an increase in the production cost of lithium batteries, which is very unfavorable for sustainable production

[0003] The treatment of battery waste has always been a big problem. Although there are many treatment methods, they are only for a certain type of battery, or the treatment process is complicated and the treatment cost is high.