Heat sealing mould structure for soft packed lithium electrical core pole ear

Abstract

The invention discloses a heat sealing mould structure for a soft packed lithium electrical core pole ear, wherein the heat sealing mould structure comprises an upper heat sealing mould and a lower heat sealing mould. The upper heat sealing mould has an upper heat sealing head, and one end of the upper heat sealing head forms an upper end single side chamfering structure; a lower heat sealing mould has a lower heat sealing head, and one end of the lower heat sealing head forms a lower end single side chamfering structure; the upper end single side chamfering structure and the lower end singleside chamfering structure are arranged symmetrically along the horizontal plane; the upper end single side chamfering structure has an upper end effective heat sealing end face, and the lower end single side chamfering structure has a lower end effective heat sealing end face; the width of the upper end effective heat sealing end face is equal to that of the lower end effective heat sealing end face. The heat sealing mould structure for the soft packed lithium electrical core pole ear prevents a heat sealing mould from being easily deformed in a machining process, a thermal conduction effect in the pole ear edge heat sealing process is improved, a packing film sol at an electrical core pole ear is guaranteed to meet requirements, and a liquid leakage phenomenon caused by severe heat deformation of the heat sealing mould is prevented from happening in 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] like...

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

Images