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

Treatment method for wasted lithium ion batteries

A technology of lithium-ion batteries and treatment methods, applied in battery recycling, waste collector recycling, recycling technology, etc., can solve environmental pollution and other problems, and achieve the effect of avoiding secondary pollution

Inactive Publication Date: 2018-06-01
山东锂想新能源科技有限公司
View PDF6 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there are many recycling processes and methods for waste lithium-ion batteries. Most of the processes focus on the extraction and reuse of valuable metals in waste lithium-ion batteries. The electrolyte, separator, and organic components such as binders and plasticizers used in the positive and negative electrode materials in the lithium-ion battery were not effectively treated during the process, resulting in these organic components contained in the lithium-ion battery Components will be released during the extraction of valuable metals, causing environmental pollution

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
  • Treatment method for wasted lithium ion batteries
  • Treatment method for wasted lithium ion batteries
  • Treatment method for wasted lithium ion batteries

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Common binders in batteries PVDF (polyvinylidene fluoride, Shandong Dongyue Shenzhou New Material Co., Ltd., model DS202), SBR (styrene-butadiene rubber, Difu Industrial (Shanghai) Co., Ltd., model SD3511S), plasticizer CMC (carboxymethyl cellulose, Difu Industrial (Shanghai) Co., Ltd., model DF9013WB) carries out thermogravimetric analysis, and the results are as follows Figure 1~3 shown. figure 1 It is the PVDF thermogravimetric curve that the embodiment of the present invention 1 provides, figure 2 Be the SBR thermogravimetric curve that the embodiment of the present invention 1 provides, image 3It is the CMC thermogravimetric curve that embodiment 1 of the present invention provides.

[0041] pass Figure 1~3 It can be seen from the results that common binders and plasticizers in batteries can be decomposed at 400 °C.

Embodiment 2

[0043] 1) Take a square waste lithium ion battery (model 2065140), the positive electrode material is lithium iron phosphate, the negative electrode is graphite, the separator is PE, and the content of organic components is 20-25 wt%.

[0044] 2) Put the waste lithium-ion battery into the inner cavity of the pyrolysis equipment equipped with an eddy current heating module, and carry out the pyrolysis treatment under an atmospheric pressure high-temperature water molecule atmosphere, and pyrolyze at a temperature of 400°C for 1 hour. During the pyrolysis process, the organic matter in the battery The components decompose into acid gases such as amorphous carbon and carbon dioxide.

[0045] 3) Pass the waste gas obtained by cracking into lime water with a concentration of 0.6 mol / L after cooling to perform absorption treatment to obtain waste gas from which acid gas has been removed.

[0046] 4) Evaluate the cracking and alkaline solution absorption effects of waste batteries. T...

Embodiment 3

[0048] 1) Take the soft-packed waste lithium ion battery (the model is 18220300 lithium iron phosphate waste lithium battery), the positive electrode material is lithium iron phosphate, the negative electrode material is graphite, the diaphragm is PE, and the content of organic components is 25-30wt%.

[0049] 2) Put the waste lithium-ion battery into the inner cavity of the pyrolysis equipment equipped with an eddy current heating module, and carry out the pyrolysis treatment under an atmosphere of high-temperature water molecules at an atmospheric pressure, and pyrolyze at a temperature of 400°C for 0.8h. During the pyrolysis process, the Organic components decompose into amorphous carbon and acid gases such as carbon dioxide.

[0050] 3) Pass the waste gas obtained by cracking into lime water with a concentration of 0.6 mol / L after cooling to perform absorption treatment to obtain waste gas from which acid gas has been removed.

[0051] 4) Evaluate the cracking and alkaline...

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 belongs to the field of environmental protection and especially relates to a treatment method for wasted lithium ion batteries. The method includes the steps of: a) classifying the wasted lithium ion batteries according to cathode materials and packaging forms; b) placing the wasted lithium ion batteries in the same class, wherein the cathode materials and packaging forms are same, into an inner chamber of a pyrolysis device, and performing pyrolysis in a high temperature water molecule atmosphere to produce solid residue and pyrolyzed waste gas, wherein the pyrolysis device is provided with an electric eddy heating module, inner chamber temperature of the pyrolysis device being 400-500 DEG C; c) alkali-washing the pyrolyzed waste gas to prepare waste gas with acidic gas removed. The method can solve the problem of organic pollutants generated during the recycling process of the wasted batteries.

Description

technical field [0001] The invention belongs to the field of environmental protection, and in particular relates to a treatment method for waste lithium ion batteries. Background technique [0002] Since the emergence of lithium-ion batteries, they have been widely used due to their high energy density, light weight, long life and no memory effect. With the widespread popularization of digital products and the gradual promotion of battery vehicles, the consumption of lithium-ion batteries continues to increase. At the same time, the generation of waste lithium-ion batteries is also increasing day by day. From the perspective of environmental protection and resource reuse, the recycling of used lithium-ion batteries is imperative. [0003] At present, there are many recycling processes and methods for waste lithium-ion batteries. Most of the processes focus on the extraction and reuse of valuable metals in waste lithium-ion batteries. The electrolyte, separator, and organi...

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 Applications(China)
IPC IPC(8): H01M10/54
CPCY02W30/84H01M10/54
Inventor 徐宝华魏绍博许龙
Owner 山东锂想新能源科技有限公司