A power lithium-ion battery pole piece slurry production line

Abstract

The invention discloses a slurry production line for a pole piece of a power lithium ion battery. The slurry production line comprises a raw material storage apparatus, a feeding apparatus, a pre-mixing apparatus, a slurry storage apparatus, a high-speed stirring apparatus, a buffering apparatus, a turnover apparatus, a filtering apparatus, a finished product storage apparatus, a nitrogen filling and releasing apparatus, a vacuum extracting apparatus, a vacuum maintaining apparatus and a vacuum bypassing circuit. By virtue of the production line, full automatic continuous production of the slurry of the pole piece of the lithium ion battery can be realized; continuous and multiple times of production can be realized by only adding raw materials into the raw material storage apparatus, without feeding in different batches, so that pollution in slurry preparation can be avoided; manpower participation is not needed, so that production time is saved and production efficiency is improved; a process of vacuumizing-nitrogen filling is performed for many times in the whole production process, so that influence of foreign gas and moisture to slurry can be effectively avoided, thereby improving the quality of the slurry; and therefore, foundation is laid for realizing consistency of the lithium ion battery.

Description

technical field [0001] The invention relates to the field of lithium ion battery production, in particular to a power lithium ion battery pole piece slurry production line. Background technique [0002] With the wide application of lithium-ion batteries, the research on power lithium-ion batteries is getting more and more in-depth. The research shows that the uniformity of the power lithium-ion battery slurry has a great influence on the performance of the battery. The more uniform the slurry is prepared for the pole piece And the smaller the particle size of the slurry, the better the performance of the power lithium-ion battery. At the same time, reducing impurity gases and moisture in the production process of power lithium-ion batteries is also conducive to improving the performance of power lithium-ion batteries. The existing slurry preparation process mostly ensures the uniformity of slurry preparation and improves the preparation efficiency of slurry from the ratio o...

AI Technical Summary

Problems solved by technology

The preparation method takes a long time, the process is not standardized, and the controllability is poor, and because the slurry is always stirred in a state of good fluidity, it is difficult to mix the material evenly, and the slurry is easy to settle, so that when the slurry is coated On the current collector, the thickness is uneven, the solid content is high and low, and the coating uniformity is very poor, which eventually leads to low consistency of the single capacitor

Application No. 201110159480.2 discloses a method for preparing supercapacitor slurry. Although the slurry preparation process has been adjusted, the method of sequential feeding and segmental stirring is still adopted. The efficiency is relatively low, and fully automated continuous production cannot be realized.

Application No. 201410838866.X discloses a preparation method of lithium-ion battery negative electrode slurry. Although this solution improves the dispersion efficiency of the slurry, it cannot realize automatic production from the raw material pretreatment process to the coating process. Exposure to air, causing secondary pollution

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