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A green recycling method and equipment for the pretreatment of waste lithium-ion batteries

A lithium-ion battery, recycling and processing technology, applied in the field of green recycling and processing methods and equipment for the pretreatment of waste lithium-ion batteries, can solve the problems of not taking into account, not taking into account secondary pollution, increasing the difficulty of wastewater treatment, and avoiding pollution. , avoid secondary pollution problems, save energy

Active Publication Date: 2019-07-09
XIAMEN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This patent enables the electrolyte of waste lithium-ion batteries to fully react with the hydrolyte, but does not consider the impact of HF gas and volatile organic solvents generated during the crushing process on the environment, and both the electrolyte and the polymer separator are refractory materials , if mixed into wastewater, it will increase the difficulty of wastewater treatment
The utility model patent CN 204817211 U discloses an integrated device for crushing and sorting waste lithium batteries. The patent elaborates that the device includes an automatic feeding device, a coarse crushing and sorting device and a fine crushing and sorting device, but does not consider the crushing process The secondary pollution problem in

Method used

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  • A green recycling method and equipment for the pretreatment of waste lithium-ion batteries
  • A green recycling method and equipment for the pretreatment of waste lithium-ion batteries

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Soak 100g of used lithium-ion batteries in 10% NaCl solution for 24 hours for complete discharge treatment, rinse with clean water, and air dry. Grind 800g of the mixture of sodium fluoride and barium fluoride into fine powder of 100 mesh, add it to 1000g of diatomite with a pore size of about 0.8mm and mix, then add 500mL of water to the mixture and stir, and transfer to Air-dried for 24 hours in the carrier board of the hollow mesh structure. Clamp the formed adsorbent bearing plate (2) into the movable slot inside the conical box (1). Put the air-dried waste lithium-ion battery in the crusher, start the motor and turn on the air extraction system at the same time, adjust the power of the air extraction machine (3) to 400W, at this time the gas detector (5) in the air duct (4) reads as 0.03mg / L. The other end of the airway extends into the absorption liquid, so that the gas in the airway is absorbed by the absorption liquid.

[0043] It shows that the technical sol...

Embodiment 2

[0045] Soak 300g of used lithium-ion batteries in 10% NaCl solution for 24 hours for complete discharge treatment, rinse with clean water, and air dry. Grind 800g of the mixture of sodium fluoride and barium fluoride into fine powder of 100 mesh, add it to 1000g of diatomite with a pore size of about 0.8mm and mix, then add 500mL of water to the mixture and stir, and transfer to Air-dried for 24 hours in the carrier board of the hollow mesh structure. Clamp the formed adsorbent bearing plate (2) into the movable slot inside the conical box (1). Put the air-dried waste lithium-ion battery in the crusher, start the motor and open the air extraction system at the same time, adjust the power of the air extraction machine (3) to 500W, at this time the gas detector (5) in the air duct (4) shows 0.08mg / L. The other end of the airway extends into the absorption liquid, so that the gas in the airway is absorbed by the absorption liquid.

[0046] It shows that the technical solution ...

Embodiment 3

[0048] Soak 500g of used lithium-ion batteries in 5% NaCl solution for 48 hours for complete discharge treatment, rinse with clean water, and air dry. Grind 600g of calcium fluoride into 100-mesh fine powder, add it to 600g of activated carbon particles with a pore size of about 0.5mm, and mix, then add 400mL of water to the mixture and stir, and transfer it to a hollow mesh-shaped carrier plate after being evenly blended Medium, air-dried for 24 hours to shape. Clamp the formed adsorbent bearing plate (2) into the movable slot inside the conical box (1). Put the air-dried waste lithium-ion battery in the crusher, start the motor and open the air extraction system at the same time, adjust the power of the air extraction machine (3) to 600W, at this time, the gas detector (5) in the air duct (4) shows as 0.12mg / L. The other end of the airway extends into the absorption liquid, so that the gas in the airway is absorbed by the absorption liquid.

[0049] It shows that the tech...

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Abstract

The invention discloses a green recycling processing method for pretreatment of waste lithium-ion batteries and a device thereof. The processing method comprises the steps that S1, the waste lithium-ion batteries are put into a NaCl solution and soaked for full electric discharge, then cleaned with clean water and air dried; S2, before the crushing, the adsorbent bearing board is clamped in a flexible clamping groove on the inner side of a cone-shape box, the obtained waste lithium-ion batteries from step S1 are placed in a crushing machine for an impact crushing using a dry method, meanwhile an air pump is opened, the power of the air pump is controlled, so that the polluting gases and the absorbent produced in the crushing process are fully contacted and absorbed by the adsorbent; S3, the unabsorbed polluted gases in S2 are discharged into the adsorption liquid through an air guide pipe. The device comprises a cone-shape body (1), an absorbent bearing plate (2), an air pump (3), an air guide pipe (4), a gas detector (5) and a liquid absorption container (6). The processing method has the advantages of being simple and effective in technology, low in recycling cost, and environmentally friendly.

Description

technical field [0001] The invention relates to the green recycling of lithium ion batteries and the recycling and utilization of renewable resources, in particular to a green recycling method and equipment for the pretreatment of waste lithium ion batteries. Background technique [0002] my country is the world's largest producer and consumer of lithium-ion batteries. In 2016 alone, the output of lithium-ion batteries reached 7.84 billion. The life of lithium-ion batteries is generally about 3 years, and the production of waste lithium-ion batteries has caused enormous pressure and serious pollution to the environment. Lithium-ion batteries are mainly composed of casing, positive electrode, negative electrode, electrolyte and separator. The positive electrode of the waste lithium-ion battery is composed of positive active material (including rare metal lithium, precious metal cobalt, nickel, manganese, etc.) Copper foil fluid composition. The electrolyte is generally com...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/54
CPCY02W30/84
Inventor 程前陈治国柯良金雷植深
Owner XIAMEN UNIV OF TECH
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