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Lithium-ion battery slurry and slurry mixing method thereof

A lithium-ion battery and slurry technology, which is applied to battery electrodes, circuits, electrical components, etc., can solve the problems of battery slurry quality, inconvenient use of CNT conductive adhesive, etc., to improve fluidity, facilitate feeding, and add more accurately Effect

Active Publication Date: 2020-06-12
DONGGUAN CHUANGMING BATTERY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the above-mentioned deficiencies of the prior art, to provide a lithium-ion battery slurry and its mixing method, aiming to solve the problem of battery failure caused by the inconvenient use of CNT conductive glue in the existing battery slurry mixing process. Slurry quality problems and production technology problems

Method used

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  • Lithium-ion battery slurry and slurry mixing method thereof
  • Lithium-ion battery slurry and slurry mixing method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0036] A method for mixing slurry of lithium ion battery slurry, comprising the steps of:

[0037] S11: In the turnover tank, the CNT conductive adhesive and the dilution solvent are prepared in a mass ratio of 2:1 to prepare a CNT conductive adhesive dilution.

[0038] S12: Dry-mix the electrode material and binder in a sealed slurry tank (with an input pipeline) to obtain dry-blended materials; the specific process is: stirring frequency 5-25Hz, stirring time 5-30min, dispersion speed 0 -500r / min.

[0039] S13: Use a pump to pump out the CNT conductive adhesive dilution in the turnover tank, then flow through the input pipeline into the slurry mixing tank containing the above dry mixed materials, and further rinse the input pipeline with 10%-40% of the slurry mixing solvent , and flow into the mixing tank for hardening treatment; the specific process is: stirring frequency 10-40Hz, stirring time 30-100min, dispersion speed 0-500r / min.

[0040] S14: Add the remaining amount...

Embodiment 2

[0042] A method for mixing slurry of lithium ion battery slurry, comprising the steps of:

[0043] S21: In the turnover tank, the CNT conductive adhesive and the dilution solvent are prepared in a mass ratio of 2:3 to prepare a CNT conductive adhesive dilution.

[0044] S22: Dry-mix the electrode material and binder in a sealed slurry tank (with an input pipeline) to obtain dry-blended materials; the specific process is: stirring frequency 5-25Hz, stirring time 5-30min, dispersion speed 0 -500r / min.

[0045] S23: Use a pump to pump out the CNT conductive adhesive dilution in the turnover tank, then flow through the input pipeline into the slurry mixing tank containing the above dry mixed materials, and further flush the input pipeline with 10%-40% of the slurry mixing solvent , and flow into the mixing tank for hardening treatment; the specific process is: stirring frequency 10-40Hz, stirring time 30-100min, dispersion speed 0-500r / min.

[0046] S14: Add the remaining amount...

Embodiment 3

[0048] A method for mixing slurry of lithium ion battery slurry, comprising the steps of:

[0049] S11: In the turnover tank, the CNT conductive adhesive and the dilution solvent are prepared at a mass ratio of 1:1 to prepare a CNT conductive adhesive dilution.

[0050] S12: Dry-mix the electrode material and binder in a sealed slurry tank (with an input pipeline) to obtain dry-blended materials; the specific process is: stirring frequency 5-25Hz, stirring time 5-30min, dispersion speed 0 -500r / min.

[0051] S13: Use a pump to pump out the CNT conductive adhesive dilution in the turnover tank, then flow through the input pipeline into the slurry mixing tank containing the above dry mixed materials, and further rinse the input pipeline with 10%-40% of the slurry mixing solvent , and flow into the mixing tank for hardening treatment; the specific process is: stirring frequency 10-40Hz, stirring time 30-100min, dispersion speed 0-500r / min.

[0052] S14: Add the remaining amount...

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Abstract

The invention belongs to the field of lithium ion batteries and in particular relates to a lithium ion battery paste and a paste mixing method thereof. The paste mixing method comprises the followingsteps: preparing a CNT (Carbon Nanotubes) conductive adhesive dilute of which the viscosity is smaller than 3000cP.s from a CNT conductive adhesive; performing primary mixing treatment on an electrodematerial and an adhesive in a sealable paste mixing tank so as to obtain a first mixed material, wherein the paste mixing tank is provided with a feeding pipeline communicated with a tank body; dividing a paste mixing solvent into a first paste mixing solvent and a second paste mixing solvent; sequentially adding the CNT conductive adhesive dilute and the first paste mixing solvent into the firstmixed material through the feeding pipeline, and performing second mixing treatment so as to obtain a second mixed material; and putting the second paste mixing solvent into the second mixed materialthrough the feeding pipeline, and performing third mixing treatment, thereby obtaining the lithium ion battery paste. Due to synergetic effects of different steps of the method, the production efficiency of paste mixing is remarkably improved, and meanwhile the stability and the dispersibility of the prepared lithium ion battery paste are both prior to those of the prior art.

Description

technical field [0001] The invention belongs to the field of lithium-ion batteries, and in particular relates to a lithium-ion battery slurry and a slurry mixing method thereof. Background technique [0002] Lithium-ion battery is a secondary battery (rechargeable battery) that mainly relies on the movement of lithium ions between the positive and negative electrodes to work. During the charging and discharging process, Li + Intercalation and deintercalation back and forth between two electrodes: when charged, Li + It is deintercalated from the positive electrode, inserted into the negative electrode through the electrolyte, and the negative electrode is in a lithium-rich state; the opposite is true during discharge. [0003] There are wet mixing and dry mixing methods for lithium-ion batteries. The difference between the two is: wet mixing needs to dissolve the binder or thickener in all the solvents to form a glue, and then add the conductive agent to the glue. and disp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/04H01M4/505H01M4/525H01M4/38H01M4/485H01M4/583H01M4/62
CPCH01M4/04H01M4/382H01M4/386H01M4/485H01M4/505H01M4/525H01M4/583H01M4/621H01M4/623H01M4/625Y02E60/10
Inventor 胡经纬杨俊赵悠曼
Owner DONGGUAN CHUANGMING BATTERY TECH