Recovery technology and separation device of waste lithium iron phosphate battery anode cathode material

A lithium iron phosphate battery and positive electrode material technology, which is applied in battery recycling, waste collector recycling, recycling technology, etc., can solve the problems of difficult control of toxic by-products, difficult technology, complicated process, etc., to reduce secondary Pollution, improved economy, good separation effect

Active Publication Date: 2017-02-22
HEFEI UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The chemical method can effectively recycle waste lithium iron phosphate batteries and obtain high-value materials, but the process is more complicated, the cost is higher, the technical difficulty is relatively large, and the toxic by-products of the reaction are difficult to control, which seriously pollutes the environment

Method used

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  • Recovery technology and separation device of waste lithium iron phosphate battery anode cathode material
  • Recovery technology and separation device of waste lithium iron phosphate battery anode cathode material
  • Recovery technology and separation device of waste lithium iron phosphate battery anode cathode material

Examples

Experimental program
Comparison scheme
Effect test

experiment example 1

[0047] Disassemble the shell of the waste power supply to obtain the packaged lithium iron phosphate battery, discharge treatment, cut the aluminum shell, separate the battery core from the aluminum shell, peel off the plastic film covering the battery core, remove the electrolyte, and obtain the battery core.

[0048] Take out the positive electrode sheet and the negative electrode sheet of the lithium iron phosphate battery from the battery cell, and unfold the positive electrode sheet and the negative electrode sheet separately.

[0049] For the positive plate of lithium iron phosphate battery, the temperature is raised to 100°C by preheating, so that the residual electrolyte is completely volatilized; after the preheating is completed, mechanical separation is performed. Mechanical separation is to use a clamp to fix and tension the positive plate of lithium iron phosphate battery. For The tensioned lithium iron phosphate battery positive plate is ground on its surface with...

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Abstract

The invention discloses a recovery technology and a separation device of a waste lithium iron phosphate battery cathode material. The recovery technology is characterized by firstly separating a lithium iron phosphate material from an aluminum foil by adopting a physical method of heating treatment and mechanical force separation, and then obtaining a novel lithium iron phosphate material by adopting the technologies of fine smashing, dissolving and impurity removing, and roasting, repairing and lithium supplementing; separating and obtaining a lithium iron phosphate recovery material by the separation device through a grinding mode of a millstone. The safe and industrial recovery method and the separation device are provided for recycling of the waste lithium iron phosphate battery cathode material, the material recovery rate can be increased, the cost is reduced, a chemical recovery technology is simplified, the resources are saved, and environment pollution is reduced.

Description

technical field [0001] The invention relates to the recovery and reuse of waste batteries, more specifically to a comprehensive recovery process and mechanical separation device for the positive electrode materials of waste lithium iron phosphate batteries. Background technique [0002] Lithium iron phosphate (LiFePO 4 ) Cathode materials are widely used in large electric vehicles, hybrid electric vehicles and other fields due to their advantages such as low price, good cycle performance, high theoretical specific capacity (170mAh / g), superior thermal stability, safety and reliability. The cycle life of lithium-ion power batteries is limited, generally 3 to 5 years. With the rapid development of the new energy automobile industry, a large number of waste power batteries are scrapped, which will inevitably cause a huge waste of resources and serious pollution of the environment. Therefore, from the aspects of cost reduction, environmental protection and resource utilization...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/54
CPCY02W30/84H01M10/54
Inventor 吴仲伟杨则恒朱华炳陈波
Owner HEFEI UNIV OF TECH
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