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Method for preparing electrode plate by dry rolling

A technology for preparing electrodes and dry rolls, which is applied in the field of lithium ions, can solve the problems of grain dropping, sticking rolls, broken belts, etc., achieve uniform thickness, reduce process equipment, and avoid uneven thickness

Active Publication Date: 2021-05-14
SVOLT ENERGY TECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for preparing electrode sheets by dry rolling in order to overcome problems such as broken belts, grain falling, and sticking rolls in the dry rolling process existing in the prior art

Method used

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  • Method for preparing electrode plate by dry rolling
  • Method for preparing electrode plate by dry rolling
  • Method for preparing electrode plate by dry rolling

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Embodiment 1

[0103] combine figure 1 , this embodiment is used to illustrate the method for preparing an electrode sheet by dry rolling of the present invention.

[0104] The first powder used in this embodiment 1 is the same as the second powder, which is a mixture of high nickel ternary positive electrode material, sodium carboxymethyl cellulose and Ketjen black (high nickel ternary positive electrode material, carboxymethyl fiber The weight ratio of plain sodium to Ketjen black is 85:7:8), and the average particle size is 10 μm. It is pre-mixed until it is fibrous and then added to the feeding bin; the first film material and the second film material are both PET film, foil Aluminum foil with a thickness of 14 μm was selected as the material.

[0105] The specific preparation method is:

[0106] (1) The first film material 11 (3m / min) and the foil material (5m / min) are unwound, and at the same time pass vertically between the opposite first rollers (specifically vertical rollers 31, 3...

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Abstract

The invention relates to the technical field of lithium ions, and discloses a method for preparing an electrode plate through dry rolling. The method comprises the following steps: (1) enabling a first membrane material and a foil material to simultaneously pass through a space between opposite first rollers, adding first powder into a gap between the first membrane material and the foil material, carrying out first rolling, and forming a first powder material tabletting layer on one side surface of the foil material; (2) enabling the first membrane material, the second membrane material and the foil material with the first powder tabletting layer to simultaneously pass through opposite second rollers, adding second powder into a gap between the second membrane material and the other side surface of the foil material, carrying out second rolling, and forming a second powder tabletting layer on the other side surface of the foil material; and 3) separating the first membrane material and the second membrane material from the side surface of the foil material to obtain the electrode plate. According to the method, double-sided simultaneous rolling and laminating flaking can be realized, the process flow is simplified, the process equipment is reduced, and the electrode plate with uniform thickness can be continuously prepared.

Description

technical field [0001] The invention relates to the technical field of lithium ions, in particular to a method for preparing electrode sheets by dry rolling. Background technique [0002] In the environment of the automobile industry using traditional energy as power supply, the problem of environmental pollution has aroused people's attention to environmental protection and resource utilization. [0003] Li-ion device technology is a key technology for the development of electric vehicles. Dry coating technology is one of the most advanced lithium-ion battery manufacturing technologies at present, wherein the dry rolling tableting process is the key to this process, and dry rolling tableting is the development direction of this process. [0004] The existing dry rolling equipment has a complex process. After the powder is put into the first rolling, under the action of the roll gap, pressure and temperature, the tension of the produced sheet cannot be controlled, and the n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/04H01M4/139
CPCH01M4/0435H01M4/139Y02E60/10
Inventor 王亮宋庆焕吴冠豪王晓郑赫
Owner SVOLT ENERGY TECHNOLOGY CO LTD
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