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Power-type lithium-ion battery cathode slurry combining technology

A lithium-ion battery, cathode slurry technology, applied in battery electrodes, electrode manufacturing, secondary batteries, etc., can solve problems such as difficult mixing and uniformity, and achieve the effect of wide application range, reasonable method and good effect

Inactive Publication Date: 2019-05-14
JIANGSU FRONT NEW ENERGY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention mainly aims at the problem that the existing dispersing equipment is not easy to mix the nano-scale raw materials, and proposes a power-type lithium-ion battery positive electrode slurry mixing process with simple steps, easy implementation and uniform mixing. The process still uses the existing dispersing equipment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Power-type lithium-ion battery positive electrode slurry mixing process, which measures the predetermined components in parts by weight, and realizes mass production through the following steps:

[0020] a. Glue making

[0021] First, measure 453kg of NMP and 42kg of PVDF according to the components, put the NMP and PVDF into the mixer for 5h dispersion, and then stand and age for 24h under the vacuum condition of -60Kpa, so as to obtain the PVDF glue;

[0022] b. Homogenate

[0023] Put all the PVDF glue prepared in the previous process into the mixing tank, and then add 750kg of active material according to the components. The active material in this example is lithium iron phosphate. After putting in lithium iron phosphate, stir for 3 hours under -60Kpa vacuum condition, the stirring speed is 35rpm for revolution, 500rpm for rotation, and then add 50kg conductive agent measured according to the components. In this embodiment, the conductive agent is composed of 25kg...

Embodiment 2

[0025] Power-type lithium-ion battery positive electrode slurry mixing process, which measures the predetermined components in parts by weight, and realizes mass production through the following steps:

[0026] a. Glue making

[0027] First, measure 416kg of NMP and 20kg of PVDF according to the components, put the NMP and PVDF into the mixer for 2 hours of dispersion, and then stand and age for 73 hours under the vacuum condition of -90Kpa, so as to obtain the PVDF glue;

[0028] b. Homogenate

[0029] Put all the PVDF glue prepared in the previous process into the mixing tank, then add 750kg of lithium iron phosphate according to the components, stir for 1h under the vacuum condition of -90Kpa, the stirring speed is 15rpm for revolution, 1500rpm for rotation, and then add Measure 20kg ST conductive agent for the components, and stir for 1 hour at the speed of 15 rpm revolution and 1500 rpm rotation under the vacuum condition of -90Kpa after the conductive agent is added. F...

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PUM

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Abstract

The invention discloses a power-type lithium-ion battery cathode slurry combining technology. According to the power-type lithium-ion battery cathode slurry combining technology, established components are weighed in parts by weight, and mass production is achieved through the following steps that firstly, NMP and PVDF are weighed according to the components and put into a stirring machine to be dispersed, and then still standing and aging are conducted under the vacuum condition; a prepared PVDF glue solution is put into a material mixing tank, active substances weighed according to the components are added, and stirring is conducted under the vacuum condition; active substances weighed according to the components are added, stirring is conducted under the vacuum condition, a conductive agent weighed according to the components is added, stirring continues being conducted under the vacuum condition, finally, the remaining NMP is added, and stirring is conducted under the vacuum condition; and after homogenate is completed, poured cathode slurry is filtered through a 150-mesh sieve for standby application. According to the power-type lithium-ion battery cathode slurry combining technology, the two-step technology is adopted for dispersing in the slurry combining process, bonding or agglomeration of raw materials can be efficiently eliminated, the uniformity of the slurry is improved, the utilization rate of the cathode material is increased, and the cathode performance of a power-type lithium-ion battery can be improved significantly through the prepared cathode slurry.

Description

technical field [0001] The invention belongs to the technical field of electrochemical battery manufacturing. Specifically, the invention relates to an electrode slurry mixing process. Specifically, the invention relates to a positive electrode slurry mixing process of a power type lithium ion battery. Background technique [0002] The power lithium-ion battery is a kind of high-energy battery. Since the high-energy battery has a high electron acceptance ability for the positive electrode, the slurry made of conventional raw materials cannot meet the requirements of the power-type lithium-ion battery. Theoretically speaking, the finer the particle size of raw materials such as lithium iron phosphate and conductive agent contained in the positive electrode slurry, the more the positive electrode function can be improved. In recent years, with the development of the manufacturing industry, the manufacturing technology used to make the positive electrode slurry of lithium-ion b...

Claims

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Application Information

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IPC IPC(8): H01M4/04H01M4/1397H01M10/0525
CPCY02E60/10
Inventor 赵燕超孙全佘沛亮
Owner JIANGSU FRONT NEW ENERGY