Method and device for collection of waste lithium ion battery electrolyte solution

A lithium-ion battery and collection device technology, which is applied in the field of collecting waste lithium-ion battery electrolyte by the device used in implementing the method, can solve the problems of high requirements for centrifuge equipment, inability to realize airtight production, and high centrifuge energy consumption. Achieve the effects of industrial reproducibility, convenient large-scale operation, and low equipment requirements

Inactive Publication Date: 2014-11-12
CALB CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

If this method is used to collect electrolyte for power batteries, the requirements for centrifuge equipment are...

Method used

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  • Method and device for collection of waste lithium ion battery electrolyte solution
  • Method and device for collection of waste lithium ion battery electrolyte solution
  • Method and device for collection of waste lithium ion battery electrolyte solution

Examples

Experimental program
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Effect test

Embodiment 1

[0034] The method for collecting waste lithium ion battery electrolyte in the present embodiment comprises the following steps:

[0035] (1) Put the discharged production scrap or the waste lithium-ion battery recovered at the end of life at an angle of 30° for 30 hours, so that the electrolyte inside the battery can be gathered together for easy export;

[0036] (2) Use a milling machine to incise the top of the battery after step (1) tilting, and then place the battery incision downward at an angle of 10° in a vacuum environment with a relative pressure of -0.06MPa, keep the pressure for 10 minutes, and collect the outflowing electrolysis liquid;

[0037] (3) Take out the cell from the battery in step (2), squeeze the cell at a pressure of 6MPa and an extrusion speed of 3mm / s to a depth of 7mm, collect the electrolyte and mix it with the electrolyte in step (2). Just merge.

Embodiment 2

[0039] In this embodiment, the schematic diagram of the device structure for collecting the electrolyte of waste lithium-ion batteries is as follows: figure 1 As shown, it includes a vacuum box 1 and a support frame 2 that is used to place the lithium-ion battery obliquely in the vacuum box, and its structural schematic diagram is as follows figure 2 As shown, the support frame 2 has a first slope 21 and a second slope 22, the angle between the first slope 21 and the second slope 22 is 90°, the angle between the second slope 22 and the horizontal plane is A=40°, At the intersection of the first slope 21 and the second slope 22, there is a hole 23 through which the electrolyte flows. Below the supporting frame 2, there is a collection device 3 for receiving the electrolyte flowing out. The collection device 3 is a container with an opening on the top. The collection device 3 and the electrolyte transfer tank 5 arranged outside the vacuum box 1 are exported through the electrol...

Embodiment 3

[0046]The method for collecting spent lithium-ion battery electrolyte in the present embodiment comprises the following steps:

[0047] (1) Using the device for collecting the electrolyte of waste lithium-ion batteries in Example 2, place the waste lithium-ion batteries on the support frame 2 at an inclination angle of 40° and let it stand for 30 hours, so that the electrolyte inside the battery is gathered together for easy export ;

[0048] (2) Use a milling machine to cut the battery after standing still, and then place it on the support frame 2 at an inclination angle of 40°, with the cut facing the electrolyte collection device 3, and evacuate until the relative pressure in the vacuum box 1 is -0.06MPa , keep the pressure for 10 minutes, so that the electrolyte flows into the collecting device 3;

[0049] (3) First remove the battery case by mechanical method, take out the battery cell, squeeze the cell with a pressure of 1MPa, the extrusion speed is 3mm / s, and the extru...

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Abstract

Belonging to the technical field of lithium ion battery recovery, the invention discloses a method and device for collection of a waste lithium ion battery electrolyte solution. The method comprises the steps of: (1) placing a waste lithium ion battery obliquely for 12-72h to round up the electrolyte solution so as to be convenient for export; (2) incising the battery in step (1), then tilting the battery incision downward and placing the battery in a vacuum environment with a relative pressure ranging from -0.05 to -0.09MPa, keeping the pressure for 2-20min, and collecting the effluent electrolyte solution; and (3) taking out an electrical core from the battery in step (2), extruding the electrical core to collect the electrolyte solution, and combining the electrolyte solution with the electrolyte solution from step (2). According to the method and devoce provided by the invention, a vacuum pumping-extrusion process is employed to collect the electrolyte solution, the process is simple, practical and efficient, and is easy to control, has industrial reproducibility, and can realize batch and continuous production.

Description

technical field [0001] The invention specifically relates to a method for collecting electrolyte solution of waste lithium-ion batteries and a device for implementing the method, belonging to the technical field of lithium-ion battery recycling. Background technique [0002] Lithium-ion batteries are widely used in electronics, transportation, energy storage, aerospace and other fields due to their significant advantages such as low cost, good safety performance, long life, high specific energy, no memory effect, and environmental friendliness. It is expected that in the next few years, a large number of waste batteries will be generated after the end of life of lithium-ion batteries. [0003] The electrolyte of waste lithium batteries contains lithium hexafluorophosphate, organic solvents and additives, and lithium hexafluorophosphate is easy to react with water to produce HF, which is toxic and highly corrosive; at the same time, the organic solvent in the electrolyte is e...

Claims

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Application Information

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IPC IPC(8): H01M10/54
CPCY02W30/84H01M10/54
Inventor 杨秋菊王楠李肖肖赵世超
Owner CALB CO LTD
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