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A green recycling method for electrolyte in waste power batteries

A power battery, recycling technology, applied in the direction of battery recycling, waste collector recycling, recycling technology, etc., can solve the problems of unavoidable electrolyte, pollution of the environment, physical injury of operators, etc., to achieve low cost and high recovery rate , The effect of solving the problem of recycling

Active Publication Date: 2016-08-17
浙江华友循环科技有限公司
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Electrolyte overflow is inevitable during battery dismantling, which will not only pollute the environment, but also cause bodily harm to operators
At present, there is no systematic recycling method for electrolyte

Method used

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  • A green recycling method for electrolyte in waste power batteries
  • A green recycling method for electrolyte in waste power batteries
  • A green recycling method for electrolyte in waste power batteries

Examples

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Comparison scheme
Effect test

Embodiment

[0019] A green recycling method for electrolyte in waste power batteries, such as figure 2 described, including the following steps:

[0020] 1) Ten pieces of 25Ah waste batteries with a mass of 5690 g were discharged and disassembled in a sealed box. The exhaust gas in the box was discharged into the atmosphere after three-stage purification treatment of NMP waste liquid, dilute lye, and water. 40 g of the ears were directly recovered, and the obtained aluminum-plastic film and the electric core were respectively put into the grid frame in the immersion tank of the NaOH aqueous solution with a concentration of 60 L and 0.05mol / L and soaked for 60 minutes. During the soaking process, the grid frame continued to Rotate to facilitate the dissolution of the electrolyte, the dilute lye circulates among the system consisting of the soaking tank, the liquid separation tank and the liquid storage tank, the total amount of the dilute lye in the three pools is 200L, such as figure 1 ...

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Abstract

The invention relates to a green recovery processing method of electrolyte inside a waste power battery. The green recovery processing method comprises the steps of cutting and disassembling a discharged waste battery, directly recovering pole lugs, respectively arranging an aluminum-plastic film and an electric core into a dilute alkali liquid soaking pool for soaking, and gathering and layering the dissolved electrolyte in a liquid separating groove; extruding the dilute alkali liquid contained in the aluminum-plastic film and the electric core in the soaking pool till no liquid flows out, directly recovering the aluminum-plastic film, gathering the unhydrolyzed electrolyte on the lower layer of the liquid separating groove, discharging through a liquid discharge opening, closing, and then treating by an electrolyte production enterprise; carrying out mechanical separation on the extruded dried electric core to obtain a diaphragm, a positive plate and a negative plate, and directly recovering the diaphragm; separating the positive plate and the negative plate by adopting a solvent method, and stirring, separating and drying to separate positive powder, negative powder, an aluminum foil sheet and a copper foil sheet. The green recovery processing method disclosed by the invention has the advantages of simple recovery process, environmental protection, high recovery rate and low cost and can be used for achieving the purpose of recovery processing of the electrolyte inside the waste lithium iron phosphate power battery.

Description

technical field [0001] The invention belongs to the technical field of recycling and processing of waste batteries, and more specifically relates to a green recycling and processing method of electrolyte in waste lithium iron phosphate power batteries. Background technique [0002] With the acceleration of the demonstration operation and promotion of electric vehicles and electric bicycles in my country, the power battery, especially LiFePO 4 , LiMn 2 o 4 The consumption of lithium-ion power batteries represented by large-scale models has increased sharply, and the future will face a large number of waste power battery disposal problems. For the power battery after use, it should be used as an energy storage battery first, which can greatly reduce the cost of power battery and energy storage battery, and speed up the popularization of electric vehicles. For scrapped or used waste power batteries that have been used in stages, they have no use value, but these batteries al...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/54
CPCY02W30/84
Inventor 时喜喜宋大卫聂赫赫宋继顺张联齐
Owner 浙江华友循环科技有限公司
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