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Ball milling tank as well as homogenizing method and application thereof

A ball milling tank and ball milling technology, which is applied in the direction of electrode manufacturing, electrical components, battery electrodes, etc., can solve the problems of active material particles and conductive agent particle structure damage, water chestnuts, and gram capacity errors, etc., to shorten the time of homogenization, Guaranteed true capacity and shortened preparation time

Active Publication Date: 2022-03-04
北京胜能能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disclosed method has low efficiency at low-speed homogenization, but when the rotation speed of the ball mill tank is high, the active material particles will be affected by the high-speed impact and shear force, so that the structure of the active material particles and the conductive agent particles will be damaged. mechanical damage
When the active material particles and conductive agent particles are destroyed, the particle size will become smaller and the water chestnuts will increase, which is not conducive to uniform dispersion. The gram capacity of the active material will be higher than the real capacity of the active material, which will cause gram capacity errors. Both DCIR test and EIS test data for coin cells can produce misleading results

Method used

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  • Ball milling tank as well as homogenizing method and application thereof
  • Ball milling tank as well as homogenizing method and application thereof
  • Ball milling tank as well as homogenizing method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0046] This embodiment provides a figure 1 As shown in the ball milling pot, the inner wall of the ball milling pot includes evenly distributed spherical protrusions, the ratio of the inner surface area of ​​the ball milling pot to the inner surface area of ​​the smooth ball milling pot is 1.75:1, and the diameter of the bottom surface of the spherical protrusions is 12.5 mm, and the distance between the centers of the bottom surfaces of adjacent spherical protrusions is 35 mm.

Embodiment 2

[0048] This embodiment provides a figure 1 As shown in the ball milling pot, the inner wall of the ball milling pot includes evenly distributed spherical protrusions, the ratio of the inner surface area of ​​the ball milling pot to the inner surface area of ​​the smooth ball milling pot is 1.5:1, and the diameter of the bottom surface of the spherical protrusions is 5mm , the distance between the centers of the bottom surfaces of adjacent spherical protrusions is 20 mm.

Embodiment 3

[0050] This embodiment provides a figure 1 As shown in the ball milling pot, the inner wall of the ball milling pot includes evenly distributed spherical protrusions, the ratio of the inner surface area of ​​the ball milling pot to the inner surface area of ​​the smooth ball milling pot is 2:1, and the diameter of the bottom surface of the spherical protrusions is 20mm , the distance between the centers of the bottom surfaces of adjacent spherical protrusions is 50 mm.

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Abstract

The invention provides a ball milling tank as well as a homogenizing method and application thereof. The inner wall of the ball milling tank comprises spherical bulges; the ball-milling tank can solve the problem that ball-milled active substance particles are mechanically damaged by high-speed impact force and shearing force when the rotating speed is high, namely, the ball-milling tank can enable slurry to achieve the effect of uniform dispersion under the condition that the active substance materials are not damaged, the slurry homogenizing time is shortened, and the slurry homogenizing efficiency is improved; the improvement of the ball-milling tank is applied to the preparation of the button cell, so that the preparation time is shortened, the real capacity of the active substance is ensured, the authenticity of subsequent DCIR and EIS test data of the button cell is ensured, and the method has guiding significance for all-cell material type selection and capacity evaluation.

Description

technical field [0001] The invention belongs to the field of lithium ion batteries, and relates to a ball milling tank, in particular to a ball milling tank and its homogenization method and application. Background technique [0002] With the advent of the era of low-carbon environmental protection, various power vehicles have emerged, and lithium-ion batteries have also developed rapidly based on their advantages such as high capacity, long life and high power. As an important raw material testing method for lithium-ion battery cathode and anode materials, button cells are widely used in the industry. [0003] The earliest homogenization method for button batteries is dispersed homogenization. The active material, conductive agent, glue and solvent are placed in a tank-shaped container, and the motor is used to drive the dispersion disc to rotate to achieve the homogenization effect. This equipment requires the outer diameter of the dispersion disc to be Smaller than a can...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/04H01M4/139B02C17/18
CPCH01M4/04H01M4/139B02C17/18Y02E60/10
Inventor 周昊李玉军高敏侯艳丽
Owner 北京胜能能源科技有限公司