Baking and drying production line of lithium ion battery cell

Abstract

The invention discloses a baking and drying production line of a lithium ion battery cell. The production line comprises a nitrogen flow pipeline, two groups of front doors and windows, at least two groups of cell trolleys, two groups of left and right trolley moving devices, two groups of lining bodies, at least two groups of side doors and windows, at least two groups of glove boxes, a vacuumizing pipeline, a rack and two groups of back doors and windows, wherein the structures of the front doors and windows, the side doors and windows and the back doors and windows are identical, one group of the left and right trolley moving device is matched with the two groups of front doors and windows, and the other group of the left and right trolley moving device is matched with the two groups of back doors and windows. The cell trolleys containing to-be-baked cells can horizontally and vertically translate through the left and right trolley moving devices, the horizontal translation aims to transfer the cell trolleys to the front of the two lining bodies, and the vertical translation aims to send the cell trolleys into the lining bodies. After the packaged cell trolleys enter the lining bodies, the front doors and windows are closed, and after baking is finished, the packaged cell trolleys are moved out from the back doors and windows and then are transferred to the next station for baking of the cell trolleys by the left and right trolley moving devices.

Description

technical field [0001] The invention relates to the field of lithium ion battery production, in particular to a lithium ion battery cell baking and drying production line. Background technique [0002] The positive and negative electrode materials used in lithium-ion batteries are all porous materials, which have strong porous adsorption characteristics and a large specific surface. If the pores are rich in water vapor, air and impurities before the battery is made, it will seriously affect the performance of the battery. Performance. In addition, the battery cell is also regarded as the heart of the battery. The existing cell drying process is to send the cell to be baked to the preheating furnace for rapid heating, and then send the cell to the vacuum drying furnace through the turnover trolley for high vacuum and heating, and then carry out Slow cooling process. The entire battery drying process takes about 72 hours, and the vacuum degree (-0.09MPa) is also low, which ...

AI Technical Summary

Problems solved by technology

The entire battery drying process takes about 72 hours, and the vacuum degree (-0.09MPa) is also low, which is a very elementary vacuum degree and cannot effectively remove water vapor, air and impurities.

Moreover, the temperature uniformity is poor during traditional baking, which affects the consistency of the battery cells. During the turnover process, the battery cells are exposed to the atmospheric environment again, and moisture impurities are likely to cause secondary pollution to the battery cells.

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