A vacuum continuous drying liquid injection pre-sealing system for lithium batteries

Abstract

The invention discloses a vacuum continuous drying and liquid injection pre-sealing system of a lithium battery. The vacuum continuous drying and liquid injection pre-sealing system is characterized by comprising a first transition bin, a drying bin, a second transition bin, a liquid-injection pre-sealing bin, a third transition bin, a tray bidirectional transmission device, a vacuum bypass device, a nitrogen inflation device, an electricity introduction device, a vacuum air pumping device and a vacuum maintenance device, wherein the drying bin comprises a single drying cycle module and an electric heater array. By the system, a semi-finished product of which lamination is completed is rapidly transferred to a process bin for drying and liquid injection pre-sealing in a pollution-free way, automatic and continuous production of the lithium battery to a liquid-injection pre-sealing process from a drying process is achieved, secondary pollution in the transfer process of the process is avoided, and the production yield is improved.

Description

technical field [0001] The invention relates to the field of lithium ion battery production, in particular to a vacuum continuous drying liquid injection presealing system for lithium batteries. Background technique [0002] In the lithium battery production process, drying and liquid injection pre-sealing are two independent processes, which are completed in a vacuum drying oven and a glove box respectively. During the two processes, semi-finished batteries need to be transported and stored, which makes semi-finished batteries absorb moisture in the air and cause secondary pollution. [0003] The existing process is: after the lithium battery stack is completed, the semi-finished battery is put into a vacuum drying oven for drying, and the drying process generally takes 72 hours. After drying, it is manually moved into the glove box for liquid injection. Then, during the transfer process of this process, the lithium-ion batteries that have been dried before will inevitabl...

AI Technical Summary

Problems solved by technology

This has caused uncontrollable factors such as water, oxygen, and organic gases. Workers cannot estimate the amount of water and oxygen entering the battery, so they need to vacuum dry it again for several hours. In this way, it will be greatly reduced. Improve the production efficiency of lithium-ion batteries

Moreover, due to the re-addition of uncontrollable factors such as moisture, oxygen, organic gas, and dust, the consistency of lithium-ion batteries has deteriorated, making it inevitable that overcharge and overdischarge will occur during the use of batteries in groups. In this case, the service life of the battery is shortened and the safety is greatly reduced.

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