A lithium-ion battery cell baking and drying production line

Abstract

The invention discloses a lithium ion battery cell baking and drying production line. The production line includes nitrogen gas circulation pipes, two sets of front doors and windows, at least two sets of cell trolleys, two sets of left and right car transport devices, two sets of inner linings, at least two sets of side doors and windows, at least two sets of glove boxes, vacuum pipes, and racks And two groups of rear doors and windows; The structure of described front doors and windows, side doors and windows and rear doors and windows is exactly the same; One group of left and right car transport devices cooperate with two groups of front doors and windows, and another group of left and right car transport devices cooperate with two groups of rear doors and windows. The battery trolley containing the batteries to be baked can be translated horizontally and vertically through the left and right car transport devices. The purpose of the horizontal translation is to transfer the battery trolley to the front of the two inner linings, and the vertical translation will move the battery The trolley is sent to the lining body. After the battery trolleys in groups enter the inner lining body, the front doors and windows are closed. After the baking is completed, the battery trolleys are moved out of the rear doors and windows in groups, and then the left and right trolleys are operated to enter the next station for the battery trolleys to bake.

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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