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Filling granulation method used for extrusion molding

A technology of extrusion molding and granulator, which is applied in the direction of electrode extrusion, electrode manufacturing, hybrid/electric double layer capacitor manufacturing, etc., which can solve the problem of uneven feeding, uneven density and thickness of electrode die surface, and poor material fluidity To achieve the effect of improving quality, uniform and controllable thickness and surface density, and avoiding holes

Pending Publication Date: 2021-07-16
GMCC ELECTRONICS TECH WUXI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems of poor material fluidity, uneven feeding, and uneven surface density and thickness of the electrode mold in the existing powder-based electrode forming method, the applicant provides a reasonable structure for extrusion. The raw materials and methods of forming and filling granulation are obtained through granulation to obtain granular materials with good fluidity and uniform particles, which improves the fluidity of the material, realizes uniform and controllable feeding, and uniform surface density and thickness of the electrode film

Method used

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  • Filling granulation method used for extrusion molding
  • Filling granulation method used for extrusion molding
  • Filling granulation method used for extrusion molding

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A filling and granulation method for extrusion molding, comprising the steps of:

[0040] (1) Select Kuraray YP50 as the powder active material, Temi high-conductivity carbon black as the powder conductive agent, and DuPont PTFE as the powder binder. The mass ratio of the three materials is 80:5: 15;

[0041] (2) Add the powder materials prepared in step (1) into the pear knife mixer for mixing, so that all kinds of powder materials are mixed evenly, and the flying knife makes the agglomerated particles of Temi high-conductivity carbon black fully broken and dispersed evenly , to obtain a first-grade particle mixture, the pear knife speed is 200 rpm, the flying knife speed is 1200 rpm, and the processing time is 30 minutes;

[0042] (3) Put the primary particle mixture in step (2) into the internal mixer, carry out high-temperature internal mixing to fully plasticize the powder binder, and fully adhere the powder active material and powder conductive agent particles to...

Embodiment 2

[0046] A filling and granulation method for extrusion molding, comprising the steps of:

[0047] (1) Tianjin Bamo lithium cobaltate cathode material is selected as the powder active material, Temi high-conductivity carbon black is used as the powder conductive agent, and DuPont’s polytetrafluoroethylene is used as the powder binder. The mass ratio of the three materials is 94:2:4;

[0048] (2) Add the powder material prepared in step (1) into the non-gravity mixer for mixing. The barrel of the non-gravity mixer is equipped with blades with biaxial rotation in opposite directions, and the blades overlap and form At a certain angle, the paddle rotates and throws the material to the space flow layer, resulting in instant weightlessness, falling into each other's area, the material mixes back and forth, and the central part forms a fluidized weightless area and rotating vortex, and the material moves radially along the axial direction, thus Form an all-round composite cycle and q...

Embodiment 3

[0053] A filling and granulation method for extrusion molding, comprising the steps of:

[0054] (1) Select Shenzhen Beiterui graphite anode material as the powder active material, polyethylene oxide as the powder binder, and the mass ratio of the two materials is 96:4;

[0055] (2) Add the powder material prepared in step (1) into the three-dimensional mixer for mixing. Since the mixing cylinder of the three-dimensional mixer has multi-directional movement tracks, the powder material is cross-mixed and the mixing effect is good. The powder materials of various components with large differences in density and particle size can be mixed evenly to obtain a primary particle mixture, and the processing time is 20 minutes;

[0056] (3) Add the primary granule mixture in step (2) into the internal mixer, which can be in dry powder state, or choose ethanol as an auxiliary agent to wet the surface of the primary granule mixture, so that the binder is fully plasticized, and the active ...

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Abstract

The invention discloses a filling granulation method used for extrusion molding. The filling granulation method comprises the following steps that firstly, 70-99% of a powder active material, 0-10% of a powder conductive agent and 1-20% of a powder binder are selected and added into a mixer for mixing to obtain a primary particle mixture; the primary particle mixture is added into a double-screw extruder, an open mill or an internal mixer to obtain a sheet-shaped, ball-shaped or block-shaped composite modified filling material; and finally, the composite modified filling material is added into a granulator for granulation treatment to obtain a secondary granular material. According to the filling granulation method, the secondary particle material with an average particle size of 100 microns-5 mm and a spherical, ellipsoidal, worm-shaped or irregular shape is obtained by adopting a mixing or extruding technology, the fluidity and uniformity of the material are improved, the material blocking phenomenon is avoided, the problems of holes and wave rolls of an electrode film are avoided, the thickness and surface density are uniform and controllable, and the quality of the electrode film in an extrusion molding mode is improved.

Description

technical field [0001] The invention relates to the field of electrode manufacture, in particular to a filling and granulation method for extrusion molding. Background technique [0002] With the shortage of traditional fossil energy and the increasing demand for energy, the development of efficient and green alternative energy is imminent. In recent years, in addition to the attention and development of new energy sources, the research on energy storage devices has become more and more extensive. At present, supercapacitors and lithium-ion batteries are promising energy storage devices. Due to their excellent energy storage characteristics, they have been widely used in energy, automobile, medical and health, electronics, military and other fields. [0003] The electrode is the core component of the energy storage device. The electrode production process is mainly divided into solvent wet coating process or extrusion forming electrode process. Among them, the extrusion fo...

Claims

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Application Information

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IPC IPC(8): B29B9/06B29B9/12B29B9/16B29C43/24B29C43/58H01M4/04H01M4/1393H01M4/1391H01M4/587H01M4/485H01M10/0525H01G11/46H01G11/32H01G11/86
CPCB29B9/06B29B9/12B29B9/16B29C43/24B29C43/58H01M4/0411H01M4/1393H01M4/1391H01M4/587H01M4/485H01M10/0525H01G11/46H01G11/32H01G11/86B29C2043/5816Y02E60/10
Inventor 王俊华孙伟
Owner GMCC ELECTRONICS TECH WUXI CO LTD
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