CN112357259A

CN112357259A - Packaging method of ternary precursor material

Info

Publication number: CN112357259A
Application number: CN202011064236.3A
Authority: CN
Inventors: 陈光旭; 林江; 王启军
Original assignee: Yibin Guangyuan Lithium Battery Co ltd
Current assignee: Yibin Guangyuan Lithium Battery Co ltd
Priority date: 2020-09-30
Filing date: 2020-09-30
Publication date: 2021-02-12
Anticipated expiration: 2040-09-30
Also published as: CN112357259B

Abstract

The invention discloses a packaging method of a ternary precursor material, which comprises the steps of sequentially mixing, screening, deironing and packaging the ternary precursor material by adopting a mixer, a screening machine, a deironing device and a packaging machine, and then packaging the ternary precursor material. According to the ternary precursor material packaging system, the mixer, the screening machine, the iron remover and the packaging machine are communicated through the pipeline, the ternary precursor material is packaged at the outlet of the packaging machine by adopting a pressurized packaging bag during packaging, so that materials and gases in the system can form counter-current, leakage and waste of the materials in the packaging process are effectively prevented, and the direct yield of a product is more than 99.2%.

Description

Packaging method of ternary precursor material

Technical Field

The invention relates to the technical field of lithium ion batteries, in particular to a packaging method of a ternary precursor material.

Background

At present, the lithium ion battery occupies a larger market share in the field of wide portable electronic equipment by virtue of the advantages of high specific capacity, long cycle life, low self-discharge rate, no memory effect, environmental friendliness and the like, and is generally recognized as the most development potential power battery for the electric vehicle. The anode material is an important component of a lithium ion battery, the current commercial anode material mainly comprises lithium iron phosphate, lithium manganate, lithium cobaltate and ternary materials, particularly the multielement materials have the characteristics of nickel, cobalt, manganese and aluminum, so that the anode material becomes a hotspot for the research of the anode material of the current power battery, has the important advantages of superior performance to lithium cobaltate, much lower cost than lithium cobaltate, much higher energy density than lithium iron phosphate and the like, and gradually becomes the mainstream anode material of the automobile power battery.

In the preparation process of the ternary material, the preparation process of the precursor accounts for 60%, and the quality of the precursor directly influences the performance of the anode material. The common ternary material is prepared by mixing and calcining secondary spherical particles formed by agglomeration of fine grains of nickel-cobalt-manganese hydroxide and lithium hydroxide. At present, the production of ternary precursor mainly adopts coprecipitation method, i.e. nickel salt, cobalt salt, manganese salt or aluminium salt is prepared into salt solution according to a certain proportion, nickel hydroxide cobalt manganese \ aluminium precipitate is formed under the condition of alkali liquor and complexing agent, and then the qualified product is obtained through the steps of centrifugal washing, slurrying, drying and the like. The preparation method mainly comprises 5 working procedures of material preparation, reaction, washing, drying and packaging. The packaging is taken as the last process and comprises four small steps of material mixing, sieving, iron removal and packaging, from material mixing to packaging, the three-element precursor basically falls from a high position in the industry according to the weight of the three-element precursor, and the packaging is completed through a series of equipment such as a mixer, a sieving machine, an iron remover, a packaging machine and the like, but the method can cause the leakage of materials from equipment joints and the like in the packaging process, so that the working environment of workers is poor, the resource waste is caused and the like.

At present, in order to solve the problem, in the process of packaging materials, a negative pressure pipe is connected to main equipment such as a mixer and a packaging machine in the industry, and a bag-type dust removal fan is connected to the outside of the main equipment, so that the system is in a negative pressure state; although the problem that the environment is polluted by the leaked materials can be well solved in the mode, the system is in a negative pressure state, a large amount of materials can be pumped into the dust removal system along with the pipeline, the material waste is also caused, and the manpower waste, the investment waste and the like are also caused.

Disclosure of Invention

The technical problem to be solved by the invention is to provide a method for packaging a ternary precursor material, and the method solves the problems of material waste and poor working environment of workers in the process of packaging the ternary precursor material by providing a simple and feasible method.

The technical scheme adopted by the invention for solving the technical problems is as follows: a three-element precursor material packaging method comprises the steps of adopting a mixer, a screening machine, an iron remover and a packaging machine to sequentially carry out mixing, screening, iron removal and packaging on the three-element precursor material, and then completing packaging.

Further, the outlets of the mixer, the screening machine and the iron remover are communicated through pipelines.

Further, the mixer and the packaging machine are communicated through a main pipeline, the screening machine, the inlet of the screening machine and the outlet of the screening machine are connected with the main pipeline, and the iron remover and the outlet of the iron remover are connected with the main pipeline

Further, the packaging bag is filled with compressed air.

Further, the screening machine is a vibrating screen.

The invention has the beneficial effects that: according to the ternary precursor material packaging system, the mixer, the screening machine, the iron remover and the packaging machine are communicated through the pipeline, the ternary precursor material is packaged at the outlet of the packaging machine by adopting a pressurized packaging bag during packaging, so that materials and gases in the system can form counter-current, leakage and waste of the materials in the packaging process are effectively prevented, and the direct yield of a product is more than 99.2%.

Drawings

FIG. 1 is a process flow diagram employed in an embodiment of the present invention.

Detailed Description

The invention is further illustrated with reference to the following figures and examples.

Example (b):

as shown in fig. 1, the process flow diagram adopted by the present invention is that the packaging equipment comprises a mixer, a vibrating screen, an iron remover and a packaging machine at a time, a tee joint is added on the mixer, the vibrating screen, the iron remover, the packaging machine and a connecting pipeline of two devices, and then the tee joint is connected with a main pipeline through a pipeline, so that a plurality of channels exist inside the packaging system, in the packaging process, the materials inside the system and the gas form an abnormal pipe convection, that is, when a packaging bag with pressure is connected to the packaging machine, the gas in the packaging bag is upward, the materials in the system is downward, and the materials in the system and the gas form an abnormal convection.

Cleaning the whole system, then putting 1t of dried ternary precursor material into a mixer, setting mixing parameters, and opening the mixer to mix for 30 min;

setting various parameters of the vibrating screen, the iron remover and the packaging machine according to the process requirements, starting the vibrating screen, the iron remover and the packaging machine after the material mixing is finished, filling compressed air into each packaging bag, and starting packaging. In the packaging process, the inspection equipment has no material leakage.

After the packaging is finished, recording the product packaging weight: 992 kg; iron removing materials: 2.5kg, oversize material: 5 kg; the direct yield of the product is as follows: 99.2 percent.

Personnel handling hygiene time: and 0 h.

Comparative example 1:

cleaning the whole system of the mixer, the vibrating screen, the iron remover and the packaging machine, then putting 1t of dried ternary precursor material into the mixer, setting mixing parameters, and opening the mixer for mixing for 30 min;

setting various parameters of the vibrating screen, the iron remover and the packaging machine according to the process requirements, starting the vibrating screen, the iron remover and the packaging machine after the material mixing is finished, and starting packaging; obvious material leakage is observed on site, and obvious material exists on the ground, equipment, packaging bags and other places.

After the packaging is finished, recording the product packaging weight: 986 kg; iron removing materials: 2.5kg, oversize material: 5 kg; the direct yield of the product is as follows: 98.6 percent.

Personnel cleaning environmental sanitation: 4.5 h.

Comparative example 2:

the whole system of the mixer, the vibrating screen, the iron remover and the packaging machine is cleaned, and the system is connected with a bag type dust removal fan to enable the system to be in a negative pressure state. Then, putting the dried 1t of ternary precursor material into a mixer, setting mixing parameters, and opening the mixer to mix for 30 min;

setting various parameters of the vibrating screen, the iron remover and the packaging machine according to the process requirements, starting the vibrating screen, the iron remover and the packaging machine after the material mixing is finished, and starting packaging; in the packaging process, the inspection equipment has no material leakage.

After the packaging is finished, recording the product packaging weight: 974 kg; iron removing materials: 2.5kg, oversize material: 5kg of outdoor dedusting material: 17.5 kg; the direct yield of the product is as follows: 97.4 percent.

It takes time for personnel to clean the filter bag: and 4 h.

Claims

1. The utility model provides a packing method of ternary precursor material, adopts blendor, screening machine, de-ironing separator, packagine machine to carry out the compounding in proper order to ternary precursor material, sieves, deironing, accomplishes the packing after packing, its characterized in that: the mixer, the screening machine, the iron remover and the packaging machine are communicated through pipelines, a packaging bag is connected to an outlet of the packaging machine to package the ternary precursor material during packaging, and the pressure in the packaging bag is high.

2. The method of packaging a ternary precursor material of claim 1, wherein: the outlets of the mixer, the sieving machine and the iron remover are communicated through pipelines.

3. The method of packaging a ternary precursor material of claim 2, wherein: the mixer and the packaging machine are communicated through a main pipeline, the screening machine, the inlet of the screening machine and the outlet of the screening machine are connected with the main pipeline, and the iron remover and the outlet of the iron remover are connected with the main pipeline.

4. The method of packaging a ternary precursor material of claim 1, wherein: the packaging bag is filled with compressed air.

5. A method of packaging a ternary precursor material according to any of claims 1 to 4, wherein: the screening machine is a vibrating screen.