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Fluidized bed and cladding method thereof

A fluidized bed and fluidized bed reactor technology, applied in electrochemical generators, electrical components, battery electrodes, etc., can solve the problems of local non-fluidization, surge, poor coating uniformity of coated particles, etc., to achieve Good uniformity, improved uniformity, improved coating effect

Pending Publication Date: 2019-04-05
HENGDIAN GRP DMEGC MAGNETICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the direct application of the fluidized bed in the prior art to the preparation of coated composite materials has the following problems: abnormal fluidization phenomena such as surging, channeling and local non-fluidization may occur in the fluidized bed during use, and the obtained Poor coating uniformity of coated particles

Method used

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  • Fluidized bed and cladding method thereof
  • Fluidized bed and cladding method thereof
  • Fluidized bed and cladding method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] This embodiment provides a fluidized bed, such as figure 1 As shown, it includes fluidized bed reactor 1, feed inlet 2, storage tank 3, gas pump 4, gas distribution plate 5, nozzle 6, material outlet 7, air inlet 8, cyclone separator 9 and gas outlet 10 ;

[0063] Wherein, the gas inlet 8 of the fluidized bed reactor 1 is connected to the air pump 4 through a pipeline, the pipeline between the gas inlet 8 and the gas pump 4 is provided with a storage tank 3 and is connected through the outlet of the storage tank 3, The top of the storage tank 3 is provided with a feeding port 2;

[0064] The shape of the gas distribution plate 5 is the same as the cross-sectional shape of the fluidized bed reactor 1 , and is fixed on the side wall of the fluidized bed reactor 1 . The unperforated part of the gas distribution plate 5 is increased along the vertical direction of the plate surface to form a cone shape, so as to avoid the accumulation of materials in the unperforated part...

Embodiment 2

[0069] This embodiment provides a method of coating treatment using the fluidized bed of Example 1. The treatment is to mix the coating precursor and the material, and specifically includes the following steps:

[0070] (a) The material is added into the storage tank 3 from the feeding port 2, and the compressed air with an initial velocity of 1.5m / s sends the material into the fluidized bed reactor 1 from the air inlet 8 through the air pump 4, and passes through the gas distribution plate 5;

[0071] (b) Adjust the gas flow rate to be 0.7m / s, so that the material forms a stable bed (distributed fluidization) in the fluidized bed reactor 1;

[0072] (c) After the material in the fluidized bed reactor 1 is stable in a dispersed fluidized state, the coated precursor solution or suspension (referred to as the coating liquid) is sent into the fluidized bed for reaction through the nozzle 6 for ultrafine spraying device 1, and the carrier gas is passed into the carrier gas pipelin...

Embodiment 3

[0076] This embodiment provides a fluidized bed and a method for coating treatment thereof. The difference between the fluidized bed and Embodiment 1 is that the number of nozzles 6 is two, and the heights of the two nozzles 6 are different, and Set on the opposite side wall.

[0077] The difference between the treatment method and Example 2 is that the initial velocity of step (a) is 2m / s; the gas velocity of step (b) is 0.9m / s, and the gas velocity of step (c) is 8m / s.

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Abstract

The invention provides a fluidized bed and a cladding method thereof. The fluidized bed comprises a fluidized bed reactor, a feeding hole, a storage tank, an air pump, a gas distribution plate, a nozzle, a discharge hole, an air inlet, a separator and an air outlet, wherein the air inlet of the fluidized bed reactor is connected with the air pump, a pipeline between the air inlet and the air pumpis provided with the storage tank, the air inlet and the air pump are connected through an outlet of the storage tank, and the feeding hole is formed in the top of the storage tank; the gas distribution plate is positioned at the lower part of the fluidized bed reactor, the separator is positioned at the upper part of the fluidized bed reactor and is connected with the air outlet formed in the topof the fluidized bed reactor, the nozzle is arranged on the side wall, top of bottom of the fluidized bed reactor, and the discharge hole is formed in the side wall of the fluidized bed reactor. Thefluidized bed realizes fluidization of materials, the influences of an abnormal fluidization phenomenon and blockage by the nozzle during operation are solved, and a cladding solution ejected from thenozzle is mixed with the materials inside the fluidized bed efficiently and uniformly, the uniformity of cladding is promoted effectively, and the using amount of a solvent is reduced.

Description

technical field [0001] The invention belongs to the technical field of composite material preparation, and relates to a fluidized bed and a coating treatment method thereof, in particular to a fluidized bed and a method for preparing coated composite materials by using the fluidized bed. Background technique [0002] Lithium-ion batteries have high energy density, high output power, are green and environmentally friendly, and do not contain toxic substances such as lead, cadmium, and mercury. They have broad application prospects in new energy vehicles and energy storage. Lithium-ion battery positive electrode material, negative electrode material, electrolyte and diaphragm are the four main components of lithium-ion batteries, and their performance basically determines the performance of lithium-ion batteries. With the rapid development of lithium-ion battery applications, people have higher and higher requirements for the capacity, cycle performance, safety performance, an...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/62H01M10/0525
CPCH01M4/366H01M4/62H01M10/0525Y02E60/10
Inventor 黄明龚金保姚淦吕舒宏
Owner HENGDIAN GRP DMEGC MAGNETICS CO LTD