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Recycling method and application of waste lithium ion battery

A lithium-ion battery, battery technology, applied in battery recycling, recycling technology, waste collector recycling, etc., can solve problems such as complex procedures, waste of resources and energy, achieve broad application prospects, realize recycling, and reduce operating procedures. Effect

Active Publication Date: 2021-11-26
BEIJING MINING & METALLURGICAL TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The first purpose of the present invention is to provide a method for recycling waste lithium ion batteries, so as to alleviate the existing technologies in the prior art that require the positive electrode active material to be stripped from the positive electrode sheet, resulting in complicated procedures and waste of resources and energy question

Method used

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  • Recycling method and application of waste lithium ion battery
  • Recycling method and application of waste lithium ion battery
  • Recycling method and application of waste lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0097] The recycling method of the waste lithium-ion battery provided in this embodiment comprises the following steps:

[0098] (a) Pretreat the waste lithium-ion battery to obtain positive and negative plates of 2mm*2mm;

[0099] Among them, the waste lithium-ion battery is a waste nickel-cobalt lithium manganese oxide battery. The pretreatment includes soaking the waste lithium-ion battery with remaining power in 2 M sodium sulfate solution and discharging it for more than 24 h; Cut a small slit on both sides of the head, place it tilted and still, wait until the electrolyte is completely drained, saw off the battery head completely, and take out two battery packs of the same size; under a fume hood, peel off most of the plastic diaphragm manually , use a shredder to evenly cut it to a suitable size;

[0100] (b) Fully mix 30g of positive and negative electrodes and 2g of carbonaceous reductant coke powder, pour it into a crucible, place the crucible in a tube furnace, eva...

Embodiment 2

[0106] The recycling method of the waste lithium-ion battery provided in this embodiment, the specific technological process is as follows figure 1 shown, including the following steps:

[0107] (a) Pretreat the waste lithium-ion battery to obtain positive and negative plates of 2mm*2mm;

[0108] Among them, the waste lithium-ion battery is a waste nickel-cobalt lithium manganese oxide battery. The pretreatment includes soaking the waste lithium-ion battery with remaining power in 2 M sodium sulfate solution and discharging it for more than 24 h; Cut a small slit on both sides of the head, place it tilted and still, wait until the electrolyte is completely drained, saw off the battery head completely, and take out two battery packs of the same size; under a fume hood, peel off most of the plastic diaphragm manually , use a shredder to evenly cut it to a suitable size;

[0109] (b) Fully mix 30g of positive and negative electrodes, 2g of carbonaceous reducing agent coke powde...

Embodiment 3

[0115] In the method for recycling waste lithium-ion batteries provided in this example, except that the chlorination agent is replaced by manganese chloride from cobalt chloride hexahydrate in step (b), the remaining steps and process parameters are the same as those in Example 2.

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Abstract

The invention provides a recycling method and application of a waste lithium ion battery, and relates to the technical field of battery recycling. The recycling method of the waste lithium ion battery, by mixing the positive and negative plates with the carbonaceous reducing agent and an optional chlorinating agent, roasting, leaching and separating the obtained roasting material to obtain lithium-containing leachate and leach residue, and then Then the leaching slag is prepared to obtain the lithium battery precursor; among them, the positive and negative plates are directly used as raw materials, and there is no need to take the step of separating the positive active material from the positive and negative plates in advance, which not only reduces the operation process, but also reduces the time and cost. Economical cost, and can make full use of the reducibility and contained energy of materials such as current collector, negative electrode graphite carbon and a small amount of unseparated diaphragm plastic, thereby increasing the destruction of the positive electrode active material structure; moreover, the introduction of chlorinating agent not only increases The leaching rate of Li is improved, the purpose of preferentially extracting lithium is achieved, and the addition of other impurity metal elements is also reduced.

Description

technical field [0001] The invention relates to the technical field of battery recycling, in particular to a recycling method and application of a waste lithium ion battery. Background technique [0002] Lithium-ion battery, as an emerging new energy battery, has greatly alleviated the dependence and destruction of human beings on natural resources, and the toxicity of its raw materials is much lower than that of nickel-cadmium batteries and lead-acid batteries. Accepted by the society, it is expected to become the leading new energy in the future. In addition to low toxicity, lithium batteries also have the advantages of long cycle life, high specific energy, small self-discharge effect, small size, high working voltage, no memory effect, wide applicable temperature range, and environmental protection, and are widely used in 3C products ( Computers, communications and consumer electronics), automobiles (plug-in hybrid electric vehicles, pure electric vehicles, hybrid elect...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/505H01M4/525H01M10/54H01M10/0525C22B7/00C22B26/12C22B23/00C22B47/00
CPCC22B7/007C22B23/0423C22B26/12C22B47/00H01M4/505H01M4/525H01M10/0525H01M10/54Y02E60/10Y02W30/84Y02P10/20
Inventor 王海北邓超群周起帆郑朝振刘三平
Owner BEIJING MINING & METALLURGICAL TECH GRP CO LTD