Soft package lithium battery tab heat sealing mold structure

Abstract

The invention discloses a heat-sealing mold structure for tabs of soft-packed lithium batteries, which includes an upper heat-sealing mold and a lower heat-sealing mold. The upper heat-sealing mold has an upper heat-sealing head, and one end of the upper heat-sealing head forms an upper-end unilateral chamfering structure; the lower heat-sealing mold has a lower heat-sealing head, and one end of the lower heat-sealing head forms a lower-end unilateral chamfering structure; The corner structure and the single-side chamfer structure at the lower end are arranged symmetrically along the horizontal plane; the single-side chamfer structure at the upper end has an effective heat-sealed end face at the upper end, and the single-side chamfered structure at the lower end has an effective heat-sealed end face at the lower end; The width of the heat-sealed end faces is equal. The structure of the heat-sealing mold for the ear of the soft-packed lithium battery of the present invention prevents the heat-sealing mold from being easily deformed during the machining process, improves the heat conduction effect in the process of heat-sealing the ear, and ensures the packaging film sol at the ear of the battery Meet the requirements and prevent the leakage of liquid caused by the severe thermal deformation of the heat-sealing mold during the production process.

Description

technical field [0001] The invention relates to the technical field of heat sealing tabs of soft-packed lithium batteries, in particular to a heat-sealing mold structure for tabs of soft-packed lithium batteries. Background technique [0002] At present, the market’s requirement for soft-pack lithium batteries is that the overall size is the same. Under the same conditions of other performance, the larger the capacity of lithium batteries, the greater the competitiveness, which means that the effective tab heat-sealed side width is smaller, which becomes the lithium battery. It is a difficult problem that core enterprise technicians need to break through. [0003] The effective lug heat-sealing edge width of soft-packed lithium batteries has changed from 2.5mm in the past to 1.5mm now, and then to 1.2mm, which is breaking through recently. By gradually reducing the effective lug heat-sealing edge width, the capacity of lithium batteries is gradually increased. [0004] Such...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the deficiencies in the prior art, provide a soft-packed lithium battery tab heat-sealing mold structure, prevent the heat-sealing mold from easily deforming in the machining process, and improve the heat-sealing tab. The heat conduction effect in the process ensures that the packaging film sol at the tab of the battery cell meets the requirements, and prevents liquid leakage caused by severe thermal deformation of the heat sealing mold during the production process

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