Cavity type liquid injection impregnation equipment

Abstract

The invention discloses cavity type liquid injection impregnation equipment, which comprises: an upper cavity device, wherein the upper cavity device comprises an upper cavity, a lifting pressurization mechanism and an air pressure circulation connector, the upper cavity is connected to the lifting pressurizing mechanism, and the air pressure circulating interface is communicated with the upper cavity and is connected with a vacuum high-pressure circulating system; and a lower cavity device which comprises a lower cavity and a tray arranged in the lower cavity, wherein the tray comprises a lower tray used for bearing a plurality of columnar batteries and an upper tray used for bearing a plurality of retainer cups filled with electrolyte, and the upper tray and the lower tray are oppositely arranged, so that liquid outlets of the retainer cups are aligned with liquid injection ports of the columnar batteries. According to the invention, the liquid injection absorption time is greatly shortened, the problem of slow absorption of the battery cell electrolyte in the prior art is solved, and compared with a conventional non-pressurization process, the absorption efficiency can be improved by more than 20%; and the production efficiency is also improved, and meanwhile, the consistency between batches of batteries is well ensured.

Description

technical field [0001] The invention relates to the field of impregnation technology, in particular to a cavity type liquid injection impregnation equipment. Background technique [0002] With the increasing application of lithium-ion batteries in various fields, especially in electric vehicles, new energy, military and other fields, countries and large companies have stepped up research and development efforts. At the same time, advanced materials such as graphene and nanomaterials The preparation technology has been continuously improved, and the research and development of lithium-ion batteries has been accelerated and integrated. The innovation speed of the lithium-ion battery industry has accelerated. Various products have come out and put on the market one after another. The development trend of the lithium-ion battery industry is getting better and better. [0003] The existing production process of lithium-ion batteries includes the steps of nailing, baking, impregna...

AI Technical Summary

Problems solved by technology

In the process of impregnating the electrolyte, it is generally necessary to carry out the battery vacuum and high pressure static process after the liquid injection is completed. Because the battery absorbs the electrolyte slowly or even difficult to absorb the electrolyte under natural conditions, the absorption time is too long, and different batteries between batches The impregnation effect is different, and the impregnation effect is different at the same impregnation time, which will easily cause poor consistency between battery batches and affect the quality of the battery.

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