Method for treating waste lithium battery

A technology for waste lithium batteries and batteries, applied in the field of environmental protection, can solve problems such as difficulty in achieving split effect, and achieve the effect of reducing difficulty and reducing emissions

Pending Publication Date: 2021-05-07
中科院过程工程研究所南京绿色制造产业创新研究院 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is a defect that the positive and negative active materials of waste lithium-io

Method used

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  • Method for treating waste lithium battery

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Experimental program
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Example Embodiment

[0047] Example 1

[0048] This embodiment provides a method for processing waste lithium batteries, and the process flow diagram of the method is as follows: figure 1 As shown, the waste lithium battery treated in this embodiment is a module battery in which the electrolyte contains dimethyl carbonate and ethylene carbonate, and the separator and the binder contain polyethylene, polypropylene, polyvinylidene fluoride and other organic substances. The method includes the following steps:

[0049] (1) Dry the crushed waste lithium battery, and the operation interval between crushing and drying is 20s to obtain the dry battery material and the first organic gas; the drying method is hot air drying, and the drying method is hot air drying at an oxygen concentration of 0.08vol%. The drying temperature is 160 ℃, and the end point of drying is to make the electrolyte removal rate in the waste lithium battery 95%;

[0050] (2) The dry battery material obtained in the pyrolysis step ...

Example Embodiment

[0056] Example 2

[0057] This embodiment provides a method for processing waste lithium batteries, and the process flow diagram of the method is as follows: figure 1 As shown, the waste lithium battery treated in this embodiment is a single battery in which the electrolyte contains diethyl carbonate and ethylene carbonate, and the separator and the binder contain organic substances such as polyethylene, polypropylene, and polyvinylidene fluoride. The method includes the following steps:

[0058] (1) Dry the crushed waste lithium battery, and the operation interval between crushing and drying is 40s to obtain dry battery material and the first organic gas; the drying method is hot air drying, and the drying method is hot air drying at an oxygen concentration of 0.01vol%. The drying temperature is 150 ℃, and the end point of drying is to make the electrolyte removal rate in the waste lithium battery 90%;

[0059] (2) The dry battery material obtained in the pyrolysis step (1)...

Example Embodiment

[0065] Example 3

[0066] This embodiment provides a method for processing waste lithium batteries, and the process flow diagram of the method is as follows: figure 1 As shown, the waste lithium battery treated in this embodiment is a waste product containing dimethyl carbonate, diethyl carbonate and ethylene carbonate in the electrolyte, and the separator and the binder containing hydrocarbon organics. The method includes the following step:

[0067] (1) Dry the used lithium battery after crushing, and the operation interval between crushing and drying is 30s to obtain dry battery material and the first organic gas; the drying method is hot air drying, and the drying method is hot air drying at an oxygen concentration of 0.05vol%. The drying temperature is 180 ℃, and the end point of drying is to make the electrolyte removal rate in the waste lithium battery 94%;

[0068] (2) The dry battery material obtained in the pyrolysis step (1) is used to remove the diaphragm and the...

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Abstract

The invention relates to a method for treating a waste lithium battery, which comprises the steps of drying the crushed waste lithium battery to obtain a dried battery material and a first organic gas; pyrolyzing the obtained dry battery material to remove a diaphragm and a binder so as to obtain a second organic gas and battery powder without organic matters; sorting the obtained battery powder to obtain black powder, aluminum, copper and iron; partially heating the obtained first organic gas, then reusing the first organic gas for drying, and purifying the rest of the first organic gas for condensation; condensing the obtained second organic gas; and reusing the organic liquid obtained through condensation for pyrolysis, and discharging non-condensable gas obtained through condensation after tail gas treatment. According to the method, organic components in the waste lithium battery can be reasonably utilized, energy consumption can be reduced, the organic components and inorganic components can be fully separated, the risk of secondary pollution is avoided in the treatment process, and the method is a green and environment-friendly treatment method.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and relates to a method for processing waste batteries, in particular to a method for processing waste lithium batteries. Background technique [0002] Lithium-ion batteries are widely used in the fields of electronics, transportation, energy storage and aerospace because of their low cost, good safety performance, long life, high specific energy, no memory effect, and environmental friendliness. In the next few years, a large amount of waste batteries will be produced after the end of life of lithium-ion batteries. For scrapped or used waste power batteries that have been used in stages, they have no use value, but these batteries also contain a large amount of electrolyte, as well as non-ferrous metals (aluminum foil and copper foil, etc.) and valuable materials (positive and negative materials), It is better to do nothing or handle it poorly, which will not only pollute the e...

Claims

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Application Information

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IPC IPC(8): H01M10/54H01M6/50
CPCH01M10/54H01M6/50Y02W30/84
Inventor 刘春伟孙峙曹宏斌
Owner 中科院过程工程研究所南京绿色制造产业创新研究院
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