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

Method for comprehensively recovering waste lithium ion battery

A lithium-ion battery and waste technology, which is applied in the field of high-efficiency green comprehensive recycling of waste lithium-ion batteries, can solve the problems of difficult industrialization of the process, low Li recovery rate, and high recovery difficulty, and achieves a process that is environmentally friendly, low in cost, and high in product purity. Effect

Pending Publication Date: 2020-02-21
广西银亿新材料有限公司 +1
View PDF10 Cites 19 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] (1) In the patent CN201810353418.9, it mixes waste nickel-metal hydride battery materials and waste lithium-ion battery materials and leaches them together, then recovers valuable metals such as Ni, Co, Mn, and finally recovers Li. This method is not only difficult to recover Li High, and Li recovery rate is low
[0006] (2) In the patent CN201810265725.1, it first adds an oxidizing agent to the positive electrode material of the waste lithium ion battery to carry out an oxidation reaction, and converts lithium into a water-soluble lithium salt through an auxiliary agent, and then puts the obtained water-soluble lithium salt in water or Lithium-rich solution is obtained after leaching in acidic solution. This method needs to add additives such as sodium sulfate, potassium sulfate, and ammonium sulfate. At the same time, it needs to be leached in acid solution. The process is complicated and the cost is increased.
This method can only recover nickel, cobalt and manganese, and the process is difficult to realize industrialization

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
  • Method for comprehensively recovering waste lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] Such as figure 1 Shown, a kind of efficient green method of comprehensive recycling waste lithium battery, comprises the following steps:

[0068] Step 1, put the waste lithium battery into a solution with a concentration of 10g / LNaCl for discharge, and then perform mechanical disassembly to obtain fine powder of positive electrode material and fine powder of negative electrode material;

[0069] Step 2. Add 30% negative electrode material fine powder to the positive electrode material fine powder according to the mass ratio, mix evenly, put it into a muffle furnace for high-temperature reduction roasting, the roasting temperature is 1000 ° C, and the roasting time is 90 minutes. After the roasting is completed And after the material is cooled to room temperature, the cooled material is crushed to 100 mesh, and the positive electrode material fine powder after reduction and roasting is obtained;

[0070] Step 3. Put the reduced and roasted positive electrode material f...

Embodiment 2

[0079] Such as figure 1 As shown, a method for efficiently recycling waste lithium batteries comprises the following steps:

[0080] Step 1. Discharge the waste lithium battery in a NaCl solution with a concentration of 15g / L, and then dismantle it mechanically to obtain fine powder of positive electrode material;

[0081] Step 2. Add 35% graphite powder to the fine powder of the positive electrode material according to the mass ratio, mix evenly, put it into a muffle furnace for high-temperature reduction roasting, the roasting temperature is 1050 ° C, and the roasting time is 60 minutes. After the roasting is completed and the material After cooling to room temperature, crushing the cooled material to 100 meshes to obtain a fine powder of positive electrode material after reduction and roasting;

[0082] Step 3. Put the reduced and roasted positive electrode material fine powder into water at a solid-to-liquid ratio of 1:3 for water quenching at room temperature. The water ...

Embodiment 3

[0091] Such as figure 1 As shown, a method for efficiently recycling waste lithium batteries comprises the following steps:

[0092] Step 1, put the waste lithium battery into a solution with a concentration of 20g / LNaCl for discharge, and then perform mechanical disassembly to obtain fine powder of positive electrode material and fine powder of negative electrode material;

[0093] Step 2. Add 40% negative electrode material fine powder to the positive electrode material fine powder according to the mass ratio, mix evenly, put it into a muffle furnace for high-temperature reduction roasting, the roasting temperature is 1100 ° C, and the roasting time is 60 minutes. After the roasting is completed And after the material is cooled to room temperature, the cooled material is crushed to 100 mesh, and the positive electrode material fine powder after reduction and roasting is obtained;

[0094] Step 3. Put the reduced and roasted positive electrode material fine powder into water...

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 comprehensively recovering a waste lithium ion battery, and relates to a method for efficiently, greenly and comprehensively recovering a waste lithium ion battery. The method is characterized by comprising the following steps: carrying out reduction roasting on waste lithium ion battery positive electrode material fine powder; and putting the positive and negative electrode fine powder subjected to reduction roasting into water for water quenching to obtain water-quenched slag rich in precious metal elements such as nickel, cobalt, manganese and the like and a lithium-rich solution; leaching the water-quenched slag with inorganic acid, and preparing battery-grade nickel salt, cobalt salt, manganese salt and other products by adopting an extraction-reverse extraction-evaporative crystallization mode; and introducing carbon dioxide gas into the lithium-rich solution to obtain a crude lithium carbonate product, and performing hydrogenation purification to obtain a battery-grade lithium carbonate product. According to the method, the leaching rate and the comprehensive recovery rate of nickel, cobalt and manganese are high, the impurity content ofthe lithium-rich solution is low, the purity of the prepared product is high, and the comprehensive recovery rate of lithium can reach 90% or above. The products obtained by recovery all reach a battery grade, the process flow is short and environment-friendly, there is no emission of waste residue, waste water and waste gas, and the recovery cost is low.

Description

technical field [0001] A method for comprehensively recycling waste lithium-ion batteries relates to a method for comprehensively recycling waste lithium-ion batteries in an efficient and green manner, and belongs to the fields of waste battery recovery and precious metal recovery. Background technique [0002] Lithium-ion batteries (hereinafter referred to as lithium batteries) have significant advantages such as high voltage, large specific capacity, long life and no memory effect. With the country's vigorous promotion of new energy policies, the rapid development of the new energy vehicle industry has led to the vigorous development of the lithium-ion power battery industry. At the same time, 3C digital, smart lithium-ion and other technological products have long been integrated into the daily life of society, but in While we enjoy technological intelligence, the problem of recycling 3C lithium-ion batteries such as waste ternary lithium-ion power batteries and lithium-i...

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
IPC IPC(8): H01M10/54H01M10/0525C22B1/02C22B7/00C22B26/12C22B23/00C22B47/00C22B3/38
CPCH01M10/54H01M10/0525C22B1/02C22B7/007C22B26/12C22B23/0415C22B47/00C22B3/3842C22B3/3846Y02W30/84Y02P10/20Y02E60/10
Inventor 王佳东吴继崇王泽强张杰李超杨文勇
Owner 广西银亿新材料有限公司