Local rubbing and flattening method and device for full-tab battery roll core

Abstract

The invention provides a local rubbing and flattening method and device for a full-tab battery roll core. The local rubbing and flattening method for the full-tab battery roll core comprises the following steps: fixing a roll core; allowing a rubbing and flattening head and the roll core to move oppositely until the end face of the rubbing and flattening head and the end face of the roll core are staggered; and enabling the rubbing and flattening head to move from the outer circumference of the roll core to a circle center so as to laminate each layer of tabs on the end face of the roll core and rubbing the tabs to a flat state towards a circle center. According to the local rubbing and flattening method for full-tab battery roll core in the invention, the end face of the rubbing and flattening head and the end face of the roll core are staggered, the rubbing and flattening head moves from the outer circumference of the roll core to the circle center, and each layer of tabs on the end face of the roll core is laminated and then rubbed to a flat state towards the circle center, so the tabs are pressed down and rubbed to the flat state one by one from outside to inside through local rubbing and flattening, and the adjacent tabs can be in contact with each other; and thus, the current collecting capacity of the roll core is improved, and the internal resistance of the roll core is reduced.

Description

technical field [0001] The invention relates to the technical field of battery manufacturing, in particular to a method and device for partially flattening a full-tab battery core. Background technique [0002] For the battery with all-tab structure, when the positive and negative current collectors are coated, there is an empty foil area at the edge. The collector plate is then welded with the shell and the cap. This structure uses the entire positive and negative current collectors as positive and negative tabs to directly draw current, effectively reducing the internal resistance of the battery. Among them, the lug flattening process is to overwhelm the originally vertical lugs so that the lugs are in contact with each other and play a better role in collecting current. After kneading, the lugs are on the same plane to facilitate the welding of the collector plate. [0003] The current kneading technology is mainly divided into two types, one is mechanical kneading: th...

AI Technical Summary

Problems solved by technology

[0008] The present invention provides a method and device for local flattening of a full-tab battery winding core, which is used to solve the problem of inconsistent flattening direction, poor flattening quality, and affecting the overall performance of the battery caused by ultrasonic flattening and mechanical flattening in the prior art. Defects, the kneading head is used to move from the outer circumference of the core to the center of the circle, and the ears of each layer of the end face of the core that the kneading head has pressed are stacked and kneaded in the direction of the center of the circle, so that the kneading direction of the ears will not cause distortion and depression. Ensure the smoothing quality and improve the overall performance of the battery

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