Unlock instant, AI-driven research and patent intelligence for your innovation.

A method for efficient separation of valuable substances from waste lithium batteries

A waste lithium battery, high-efficiency technology, applied in battery recycling, waste collector recycling, recycling technology, etc., to achieve the effect of good recovery rate, high separation purity, and simple process flow

Active Publication Date: 2019-08-09
HEFEI GUOXUAN HIGH TECH POWER ENERGY
View PDF12 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the separation and treatment of waste lithium batteries, most domestic and foreign patents and manufacturers currently use simple disassembly and direct roasting to make organic matter volatilize or undergo pyrolysis reactions. Such methods will produce a large amount of toxic and harmful gases. The existence of the flue has put forward higher requirements for the follow-up flue equipment and treatment process

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A method for efficient separation of valuable substances from waste lithium batteries

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Classify the used lithium batteries according to the different models. In the lithium battery discharge equipment, carry out the power test on the used lithium batteries, and connect the external load to the lithium battery with a voltage greater than 0.5V, connect the battery to the resistor, and use the heat release process to consume the battery. The power of the single battery is reduced to less than 0.5V; under the condition of a closed-loop nitrogen atmosphere, cutting and dismantling are carried out. The cutting surface is 3cm from the end of the cover plate. The rate can reach 99.8%. The battery core is sealed and crushed. The average particle size of crushing is 20mm. When dismantling and crushing, the overflow liquid enters the overflow tank, and the volatile organic compound gas is cooled and liquefied. The crushed material is added with tetrachlorethylene at a solid-to-liquid ratio of 1:3 , soaked at 15°C for 2 hours, the positive electrode powder and negativ...

Embodiment 2

[0029] The waste lithium battery (model: 18650) is tested in the lithium battery discharge equipment, and the lithium battery with a voltage greater than 0.5V is connected to an external load, connected to the resistor through the battery, and the battery is consumed by the heat release process. cut and disassembled under the condition of closed circulation helium atmosphere, the cutting surface is 1cm from the end of the cover plate, after dismantling, the internal battery cell and the outer aluminum shell are obtained, the battery cell After airtight crushing, the average particle size of crushing is 5mm, the crushed material is added with styrene at a solid-to-liquid ratio of 1:0.5, soaked at 40°C for 1 hour, the positive electrode powder and negative electrode graphite can fall off the plate, and the organic reagent is dissolved in the organic phase After degreasing, the 1# mixed powder is stirred with water according to the solid-to-liquid ratio of 1:2 and left to stand, t...

Embodiment 3

[0031] The waste lithium battery (model: 20100140) is tested in the lithium battery discharge equipment, and the lithium battery with a voltage greater than 0.5V is connected to an external load, connected to the resistor through the battery, and uses the heat release process to consume the battery The electric quantity, so that its voltage is reduced to below 0.5V, under the condition of closed cycle nitrogen atmosphere, cutting and dismantling are carried out, the cutting surface is 2cm from the end of the cover plate, after dismantling, the internal battery cell and the outer aluminum shell are obtained, and the battery cell passes through Airtight crushing, the average particle size of crushing is 20mm, the crushed material is added with styrene at a solid-to-liquid ratio of 1:3, soaked at 30°C for 1.5h, the organic reagent is dissolved in the organic phase and separated, and the 1# mixed powder after degreasing According to the solid-to-liquid ratio of 1:2, add water and s...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a method for effectively separating valence substances from a waste lithium battery. The method comprises the steps of classifying the waste lithium battery according to different types, discharging the waste lithium battery in discharging equipment, and disassembling to obtain an internal battery cell and an outer package aluminum shell; smashing the battery cell, adding an organic solvent for immersion, and performing filtering and oil removal; adding water for stirring, allowing the mixture to stand, and separating a separator; performing wet ball-milling on filtered powder, adding water for dilution, performing flotation, and separating high-purity graphite and aluminum powder; and changing concentration of paste and a flotation condition, and performing secondary flotation so that flotation upper-layer positive powder and flotation lower-layer copper powder can be obtained. The separation method has the characteristics of simplicity, low energy consumption, small environmental pollution, low production intensity, good separation effect and high recycle ratio and has relatively good production benefit, and each valence substance in the waste lithium battery can be effectively separated.

Description

technical field [0001] The invention relates to the field of recycling waste lithium batteries, in particular to a method for efficiently separating valuable substances from waste lithium batteries. Background technique [0002] The recyclable parts of waste lithium-ion batteries mainly include positive electrode materials, negative electrode materials, electrolytes, separators, shells, cover plates, etc. The positive electrode generally uses lithium-based intercalation compound Li x m y x z (M is usually nickel, cobalt, manganese, vanadium, iron, etc.), PVDF, aluminum foil as the main base material; the negative electrode material generally includes graphite, binder and copper foil, etc.; the electrolyte is generally LiPF 6 The main conductive salt, the mixed solvent system based on EC, PC, DMC, EMC; the separator is generally polyethylene, polypropylene microporous membrane, copolymer of propylene and ethylene, polyethylene homopolymer, etc.; the shell is generally Alu...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/54
CPCY02W30/84
Inventor 徐懋曹利娜王德钊张宏立
Owner HEFEI GUOXUAN HIGH TECH POWER ENERGY