Special-purpose equipment and manufacturing process for preventing damage of upper angular position of second sealing edge of soft-packed lithium cell core

Abstract

Special-purpose equipment for preventing damage of an upper angular position of a second sealing edge of a soft-packed lithium cell core and a manufacturing process of a soft-packed lithium battery for preventing the damage of the upper angular position of the second sealing edge of the soft-packed lithium cell core relate to the technical field of soft-packed lithium cell core processing. The equipment includes a machine frame, a driving device fixed on the machine frame, and a feeding track disposed below the driving device; an angle pressing lower sealing head is fixed on the lower portionof the driving device; and the driving device drives the angle pressing lower sealing head to perform base angle pressing and apex angle pressing treatment on the upper angle position of the second sealing edge of the soft-packed lithium battery.

Description

technical field [0001] The invention relates to the technical field of soft-packed lithium batteries, in particular to a special device for preventing damage to the upper corner of the second sealing side of a soft-packed lithium battery cell and a soft-packed lithium battery using the device to prevent damage to the upper corner of the second sealing side of the soft-packed lithium battery cell Battery manufacturing process. Background technique [0002] At present, from the top and side sealing of the cell to the degassing and sealing process of the cell, there are filming, coding, corner pressing, side short test, flaring, baking, liquid injection, vacuum liquid, sealing, formation, fixture formation in the middle , voltage measurement and other processes, the old process generally only presses the bottom corner, not the top corner, mainly to prevent the bottom corner of the cell from being broken. With the feedback of the full inspection process in the testing workshop, ...

AI Technical Summary

Problems solved by technology

Since the area where the airbag area meets the main body of the battery cell is the support point for bending, there will be stress concentration at the sharp corner of the airbag side near the upper corner of the main body. After bending many times, it is easy to cause the aluminum layer to fatigue and cause cracks ,damaged

Once cracks or damage occur, water vapor can enter the battery and react with lithium hexafluorophosphate to produce gas, causing problems such as battery inflation, voltage reduction, capacity reduction, and even electrolyte leakage.

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