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Cathode material coating device and coating method

A technology of positive electrode materials and coating devices, which is applied to the device and coating of the surface coating liquid, which can solve the problems of insufficient fluidization power, optimize the circulation flow pattern, avoid insufficient power, and reduce pressure drop Effect

Active Publication Date: 2021-06-22
清陶(昆山)自动化装备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a positive electrode material coating device and coating method, which can solve the problem of fluidization caused by the large pressure drop at the stirring paddle without destroying the flow pattern of the positive electrode material in the fluidized bed cavity. underpowered problem

Method used

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  • Cathode material coating device and coating method
  • Cathode material coating device and coating method
  • Cathode material coating device and coating method

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Experimental program
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Effect test

Embodiment 1

[0043] Such as Figure 1 to Figure 3 As shown, this embodiment provides a positive electrode material coating device, which is mainly used for coating the positive electrode material with a ternary material to form a solid electrolyte coating layer on the surface of the positive electrode material. The ternary material is a solid particle, which is referred to as a ternary particle in this embodiment.

[0044] The above-mentioned positive electrode material coating device includes a fluidized bed cavity 1, and a stirring paddle 2 rotatingly arranged in the fluidized bed cavity 1, the outer peripheral wall of the stirring paddle 2 and the inner peripheral wall of the fluidized bed cavity 1 enclose a first Annular channel 3 ; depressurization hole 21 is provided on stirring paddle 2 , and decompression hole 21 runs through two axial end faces of stirring paddle 2 .

[0045] In this embodiment, the pressure-reducing hole 21 is provided on the stirring paddle 2, and the upper and...

Embodiment 2

[0074] The difference between this embodiment and the first embodiment is that at least two circles of pressure-reducing holes 21 are added to further reduce the pressure drop in the upper and lower spaces of the stirring paddle 2, so as to improve the uniformity of particle coating.

Embodiment 3

[0076] Such as Figure 4 As shown, in this embodiment, the top of the fluidized bed chamber 11 is provided with a circulating tuyere, and the end of the carrier gas pipeline away from the first feeding port 13 communicates with the circulating tuyere, and the circulating tuyere is located downstream of the filter 4 .

[0077]The above-mentioned drying assembly includes a condenser 61, a heat exchanger 65 and a heater 64, wherein the condenser 61 and the heat exchanger 65 are located upstream of the air blower 7, the condenser 61 is located upstream of the heat exchanger 65, and the heater 64 is located at the upstream of the air blower 7 downstream. The above-mentioned condenser 61 can condense the gas at -25°C to remove water vapor in the gas. The heat exchanger 65 is an air heat exchanger to raise the temperature of the gas condensed by the condenser 61. The heater 64 is used to The gas is further heated to make the gas temperature meet the usage requirements.

[0078] Whe...

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Abstract

The invention relates to the field of material processing equipment, and discloses a cathode material coating device and coating method. The coating device comprises a fluidized bed cavity, and a stirring paddle rotatably arranged in the fluidized bed cavity; the outer circumferential wall of the stirring paddle and the inner circumferential wall of the fluidized bed cavity define a first annular channel; the stirring paddle is provided with pressure reducing holes, the pressure reducing holes penetrate through two axial end surfaces of the stirring paddle; at least one circle of pressure reducing holes are arranged; each circle of pressure reducing holes comprises a plurality of pressure reducing holes which are uniformly distributed in the circumferential direction; and a round hole enclosed by the central axis of each circle of pressure reducing holes is coaxial with the stirring paddle. The pressure reducing holes are formed in the stirring paddle, the upper and lower spaces of the stirring paddle communicate through the pressure reducing holes, and airflow in the space below the stirring paddle can flow to the space above the stirring paddle through a first annular channel and can also flow to the space above the stirring paddle through the pressure reducing holes, so that the pressure drop between the upper and lower spaces of the stirring paddle is reduced on the basis that the flowing form of the ternary particles in the fluidized bed cavity is not damaged, and insufficient fluidization power of ternary particles is avoided.

Description

technical field [0001] The invention relates to the field of material processing equipment, in particular to a positive electrode material coating device and a coating method. Background technique [0002] Compared with lithium iron phosphate cathode materials, ternary cathode materials have attracted attention due to their higher capacity, but high-nickel ternary cathode materials generally have safety issues. The surface is clad to improve safety. [0003] The traditional coating effect is limited, and the rotary fluidized bed is a new type of coating device, which mainly includes a fluidized bed cavity, a stirring shaft and a partition installed in the fluidized bed cavity, and a through hole is arranged on the partition , the top of the stirring shaft passes through the through hole and is connected with a stirring disk, the stirring disk and the partition are arranged at intervals along the vertical direction, and a first annular shape is formed between the outer perip...

Claims

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Application Information

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IPC IPC(8): B05C19/02B05D1/24
CPCB05C19/02B05D1/24Y02E60/10
Inventor 施展冯玉川李峥
Owner 清陶(昆山)自动化装备有限公司
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