Preparation method of lithium ion battery sizing agent

A lithium-ion battery and slurry technology, which is applied in the field of lithium-ion battery slurry preparation, can solve the problems that the glue is easy to adhere to the pipe wall, difficult to clean, and the pipeline is not smooth, so as to improve the utilization rate of equipment and The effects of increasing production capacity, shortening process time, and improving automation

Inactive Publication Date: 2019-04-02
福建冠城瑞闽新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the transportation process, the glue is easy to adhere to the pipe wall, which is difficult to clean, and it will easily cause the pipe to be blocked or blocked after a long time

Method used

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  • Preparation method of lithium ion battery sizing agent
  • Preparation method of lithium ion battery sizing agent
  • Preparation method of lithium ion battery sizing agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] according to figure 1 The steps shown prepare an oily positive electrode slurry for a lithium ion battery.

[0043] Dry material mixing: according to the formula: 94 parts of lithium iron phosphate powder, 2 parts of conductive carbon black 350G, 5 parts of carbon nanotube conductive paste, 3 parts of polytetrafluoroethylene binder and 100 parts of NMP, and accurately weigh each raw material Ingredients, 94 parts of lithium iron phosphate powder, 2 parts of conductive carbon black 350G, 5 parts of carbon nanotube conductive paste and 3 parts of polytetrafluoroethylene binder are added to the mixing tank with stirring and dispersion, at 6rpm Low speed mixing was carried out at stirring speed for 90 minutes.

[0044] Low-speed high-viscosity stirring: Add 31 parts of NMP, and mix at a low speed of 7 rpm and 20 rpm for 90 minutes to make the material in the mixing tank into a lump, and make the material on the tank wall and the stirring paddle every 30 minutes. Dry mater...

Embodiment 2

[0050] Preparation of lithium ion battery oily negative electrode slurry.

[0051] Dry material mixing: according to the formula: 95 parts of intermediate carbon microspheres, 2.6 parts of conductive carbon black KS-6, 0.2 parts of oxalic acid, 3.8 parts of polytetrafluoroethylene binder and 101 parts of NMP, accurately weigh the ingredients of each raw material, and put Add 95 parts of intermediate carbon microspheres, 2.6 parts of conductive carbon black KS-6, 0.2 parts of oxalic acid and 3.8 parts of polytetrafluoroethylene binder into the mixing tank with stirring and dispersion, and carry out low-speed stirring at a stirring speed of 7rpm Mix for 80 minutes.

[0052] Low-speed high-viscosity stirring: Add 28 parts of NMP, and mix at a low speed of 6 rpm and a dispersion speed of 30 rpm for 100 minutes to make the material in the mixing tank into a lump, and every 30 minutes. Dry material to clean up.

[0053] Medium-speed medium-viscosity stirring: continue to add 35 pa...

Embodiment 3

[0058] Preparation of aqueous negative electrode slurry for lithium ion batteries.

[0059] Dry material mixing: According to the formula: 96 parts of nano-carbon spheres, 2.6 parts of SFG-15 conductive agent, 2.1 parts of CMC powder, 81 parts of deionized water and 8 parts of styrene-butadiene emulsion with a weight concentration of 45%, and accurately weigh each raw material Ingredients, 96 parts of carbon nanospheres, 2.6 parts of SFG-15 conductive agent, and 2.1 parts of CMC powder were added to a mixing tank with stirring and dispersion, and mixed at a low speed of 7 rpm for 110 minutes.

[0060] Low-speed high-viscosity mixing: add 27 parts of deionized water, and mix at a low speed of 10 rpm for 120 minutes to make the material in the mixing tank into a lump, and dry the dry material on the tank wall and the stirring paddle every 30 minutes. clean up.

[0061] Medium-speed medium-viscosity stirring: continue to add 21 parts of deionized water, carry out medium-speed st...

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Abstract

The invention relates to the field of lithium ion batteries, and specifically relates to a preparation method of a lithium ion battery sizing agent. The preparation method of the lithium ion battery sizing agent disclosed by the invention comprises the following five steps: dry material blending, low-speed high-viscidity stirring, medium-speed medium-viscidity stirring, high-speed low-viscidity stirring, viscidity modification and sizing agent discharge. The preparation method can be used for preparing an oily positive electrode sizing agent, an oily negative electrode sizing agent and an aqueous negative electrode sizing agent, the special working procedure of prefabricating a glue solution can be saved, the technological operating steps of the blending working procedure are simplified, the technological time is shortened, the utilization rate and capacity of the equipment are improved, gluing equipment, glue solution storage equipment or transfer equipment does not need to be purchased, the automation degree of blending is improved, and the uniformity and stability of the sizing agent are improved.

Description

technical field [0001] The invention belongs to the field of lithium ion batteries, and in particular relates to a preparation method of slurry for lithium ion batteries. Background technique [0002] As we all know, the mixing process is the most critical process in the manufacturing process of lithium-ion batteries, and plays a vital role in the performance of lithium-ion batteries. Especially for power batteries, the required service life of the battery is more than ten years, and it may be used alternately in very cold or very hot environments, which affects the high and low temperature performance, rate performance, and durability of the battery. And security puts forward very strict requirements. [0003] The performance of the battery depends mainly on the quality of the battery pole piece. However, the quality of the pole piece mainly depends on the quality of the pole piece when it is coated. The coating quality of pole pieces, on the one hand, has a certain rela...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/505H01M4/525H01M4/485H01M4/58H01M4/583H01M4/48H01M4/62H01M10/0525
CPCH01M4/362H01M4/483H01M4/485H01M4/505H01M4/525H01M4/5825H01M4/583H01M4/623H01M4/625H01M10/0525Y02E60/10
Inventor 李维义李越刘梦黄茂龙吴持品刘志刚
Owner 福建冠城瑞闽新能源科技有限公司
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