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

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Problems solved by technology

During the transportation process, the glue is easy to adhere to the pipe wall, which is dif

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
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Example Embodiment

[0041] Example 1

[0042] according to figure 1 The procedure shown was to prepare an oily cathode slurry for Li-ion batteries.

[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, accurately weigh each raw material Ingredients, add 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 into a stirring tank with stirring and dispersing, at 6 rpm Mix at low speed for 90 minutes at agitation speed.

[0044] Low-speed and high-viscosity stirring: add 31 parts of NMP, carry out low-speed stirring and mixing for 90 minutes at a stirring speed of 7rpm and a dispersing speed of 20rpm, so that the material in the mixing tank becomes lumpy, and the material on the cylinder w...

Example Embodiment

[0049] Example 2

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

[0051] Mixing of dry materials: 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 each raw material component, 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 were added to a stirring tank with stirring and dispersing, and the stirring speed was carried out at a low speed of 7 rpm. Mix for 80 minutes.

[0052] Low-speed high-viscosity stirring: add 28 parts of NMP, and conduct low-speed stirring and mixing for 100 minutes at a stirring speed of 6 rpm and a dispersing speed of 30 rpm, so that the materials in the mixing tank become lumps. Clean up dry material.

[0053] Medium-speed and medium-v...

Example Embodiment

[0057] Example 3

[0058] Aqueous anode slurry for lithium ion battery was prepared.

[0059] Dry material mixing: According to the formula: 96 parts of nano carbon balls, 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%, accurately weigh each raw material Ingredients, 96 parts of nano-carbon balls, 2.6 parts of SFG-15 conductive agent, 2.1 parts of CMC powder were added to a stirring tank with stirring and dispersing, and the stirring speed was 7 rpm for low-speed stirring and mixing for 110 minutes.

[0060] Low-speed high-viscosity stirring: Add 27 parts of deionized water, and carry out low-speed stirring and mixing for 120 minutes at a stirring speed of 10 rpm, so that the materials in the mixing tank become lumps, and the dry materials on the cylinder wall and stirring paddle are cleaned every 30 minutes. clean up.

[0061] Medium-speed and medium-visc...

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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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