Lithium battery tab hot press molding method

Abstract

The invention relates to a lithium battery tab hot press molding method. The method comprises the use of an intermediate hot pressing mechanism for bonding a tab glue strip to a metal tape by hot pressing; wherein the intermediate hot pressing mechanism is provided with upper and lower hot press end sockets which move synchronously and oppositely; the two sides of the hot press sealing head are respectively provided with left and right groups of metal tape heating mechanisms; each group of metal tape heating mechanism is provided with upper and lower heating heads which move synchronously and oppositely; the working temperature of the hot press end socket is greater than or equal to the softening point temperature of the tab glue strip and less than the melting point temperature of the tab glue strip; the working temperature of the heating head is greater than the melting point temperature of the tab glue strip; after the metal tape heating mechanism starts to heat the metal tape, and the lag time of the intermediate hot pressing mechanism is not less than 0.1 second, the hot press bonding and molding operation of the tab glue strip and the metal tape is started. The method has the advantages of good formability, stable and reliable heating temperature, easiness in monitoring and control, stable hot press operation, no damage to the outline dimension of the tab glue strip, and greatly shortened hot press molding time. The method disclosed by the invention is applicable to the manufacturing of a large-power tab.

Description

technical field [0001] The invention relates to a lithium battery manufacturing technology, in particular to a lithium battery tab hot-press forming method. Background technique [0002] In view of the wide range of high-frequency fluctuations in the high-frequency tab forming machines currently in use (expressed in two aspects: one is that the high-frequency is constantly changing within 1 second required to generate high-frequency during use, and the other is that the working process The temperature difference generated on the working area of ​​the required high frequency is large), and the sudden high frequency efficiency is greatly reduced or does not work at all from time to time, and it may automatically recover after a period of time. This is extremely difficult to control for the production process of continuous automatic roll-type tab products. Once this situation occurs and is not eliminated, it will bring disastrous consequences. The high-frequency tab forming m...

AI Technical Summary

Problems solved by technology

The disadvantages are: the high frequency fluctuation range is large, and it is temporarily impossible to convert the high frequency frequency into an intuitive temperature for monitoring and control; It may be recovered automatically, which brings great challenges to the control, how to find and remove these deadly waste products

Its shortcoming is that it takes a long time for heat transfer and heating of the heated object; the temperature of the head directly pressed on the ear glue must be higher than the melting point of the ear glue. During the long-term heating heat transfer and pressurization process, the ear The glue will be seriously overflowing, affecting the original size and appearance of the length and width

If the temperature is low, the time will be greatly extended and the efficiency will be reduced; the two outer surfaces of the ear glue must be completely melted and re-cooled to shape, and the two surfaces must be completely melted in the subsequent section before being combined with the inner surface of the aluminum-plastic composite film. PP firm bonding has certain adverse effects

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