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A method for efficiently and safely discharging waste lithium-ion batteries

A lithium-ion battery, waste technology, applied in battery recycling, waste collector recycling, recycling technology and other directions, can solve the problems of electrolyzed water easily producing hydrogen and oxygen, affecting production efficiency, and having potential safety hazards, and achieving broad industrial application Prospects, improved discharge safety, low cost effect

Active Publication Date: 2020-09-08
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the discharge rate of this method is slow, which affects production efficiency. Electrolyzed water is prone to generate hydrogen, oxygen, etc., which has potential safety hazards. The used water is difficult to handle due to the pollution of the organic electrolyte flowing out of the old battery.

Method used

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  • A method for efficiently and safely discharging waste lithium-ion batteries

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Comparison scheme
Effect test

Embodiment 1

[0031] A high-efficiency and safe discharge method for waste lithium-ion batteries, comprising the following steps:

[0032] (1) Add a certain amount of regenerated graphite powder and fine sand into the box containing the stirring device, and the volume ratio of graphite powder to fine sand is 10:1;

[0033] (2) The waste lithium-ion battery to be treated is added in the device, and the volume ratio of graphite powder and lithium-ion battery is 4:1;

[0034] (3) Start the stirring device, stir for a certain period of time, stop, and discharge the battery under static conditions, and the discharge time is 12h;

[0035] (4) After 12 hours, sieve the powder in the box and the waste lithium-ion battery, disassemble the separated lithium-ion battery, and recycle graphite powder and fine sand to continue to discharge the waste lithium-ion battery.

[0036] Adopt present embodiment to the voltage change of waste lithium ion battery discharge as follows figure 1 As shown, it shows ...

Embodiment 2

[0038] A high-efficiency and safe discharge method for waste lithium-ion batteries, comprising the following steps:

[0039] (1) Add a certain amount of regenerated graphite powder and fine sand into the box containing the stirring device, and the volume ratio of graphite powder to fine sand is 8:1;

[0040] (2) The waste lithium-ion battery to be treated is added in the device, and the volume ratio of graphite powder and lithium-ion battery is 2:1;

[0041] (3) Start the stirring device, stir for a certain period of time, stop, and discharge the battery under static conditions, and the discharge time is 12h;

[0042] (4) After 12 hours, sieve the powder in the box and the waste lithium-ion battery, disassemble the separated lithium-ion battery, and recycle graphite powder and fine sand to continue to discharge the waste lithium-ion battery.

[0043] The voltage change of the waste lithium-ion battery discharged by using this embodiment shows that the voltage of a lithium cob...

Embodiment 3

[0045] A high-efficiency and safe discharge method for waste lithium-ion batteries, comprising the following steps:

[0046](1) Add a certain amount of regenerated graphite powder and fine sand into the box containing the stirring device, and the volume ratio of graphite powder to fine sand is 5:1;

[0047] (2) The waste lithium-ion battery to be treated is added in the device, and the volume ratio of graphite powder and lithium-ion battery is 1:1;

[0048] (3) Start the stirring device, stir for a certain period of time, stop, and discharge the battery under static conditions, and the discharge time is 24h;

[0049] (4) After 24 hours, sieve the powder in the box and the waste lithium-ion battery, disassemble the separated lithium-ion battery, and recycle the graphite powder and fine sand to continue to discharge the waste lithium-ion battery.

[0050] The voltage change of the waste lithium-ion battery discharged by this embodiment shows that the voltage of a lithium cobalt...

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Abstract

The invention discloses a method for efficiently and safely discharging a waste lithium-ion battery. The method is characterized in that the waste lithium-ion battery and a conductive powder containing medium are stirred and mixed and then stood for discharging. With the adoption of the method, the discharging efficiency and safety of the waste lithium-ion battery can be greatly improved; the discharging time is reduced; the cost is low; in addition, the technology is simple; and the method is applicable to mass application.

Description

technical field [0001] The invention relates to a treatment method for waste lithium-ion batteries, in particular to a high-efficiency and safe discharge method for waste lithium-ion batteries, and belongs to the field of waste lithium-ion battery recycling. Background technique [0002] Lithium-ion batteries as power batteries—EV (pure electric vehicle), PHEV (plug-in hybrid electric vehicle) and HEV (hybrid electric vehicle) have entered a period of rapid growth. The International Energy Agency predicts that the total sales of HEV / PHEV / EV will reach 1,100 in 2015. million vehicles, reaching nearly 24 million vehicles in 2020, the market share of lithium-ion batteries in power batteries will gradually increase. As the largest lithium-ion battery production base in my country, the annual output of lithium-ion batteries exceeds 2 billion. BYD has established a power battery production base with a total production scale of 8Gwh, which can provide batteries for 600,000 hybrid c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/54
CPCH01M10/54Y02W30/84
Inventor 张治安赖延清宋俊肖洪波方静张凯李劼
Owner CENT SOUTH UNIV
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