Tab dislocation adjusting method and device

Abstract

The invention relates to a tab dislocation adjusting method and device. The tab dislocation adjustment method comprises the following steps of: winding a pole piece on a winding needle, selecting a predetermined number of tabs on the pole piece as test tabs, obtaining an actual angle value of the winding needle corresponding to each test tab, the actual angle value being an angle value of the winding needle rotating when the winding needle detects that the corresponding test tab is about to be wound on the winding needle from a timing zero point; comparing the actual angle value of each test tab with a corresponding standard angle value to obtain an angle difference value of each test tab; obtaining a dislocation arc length corresponding to each test tab according to the angle difference value corresponding to each test tab; determining an average dislocation arc length according to the dislocation arc length of each test tab; and under the condition that the average dislocation arc length exceeds an allowable dislocation value, enabling the winding needle to rotate to compensate the angle value. According to the tab dislocation adjusting method disclosed by the invention, dislocated tab clusters can be adjusted towards preset positions, so that the possibility of disqualification of a battery cell caused by deviation of the tab clusters is reduced.

Description

technical field [0001] The present invention relates to the technical field of batteries, in particular to a method and device for adjusting tab dislocation. Background technique [0002] With the development of the lithium battery industry, increasing the thickness of the battery cell is one of the ways to improve the efficiency and energy density of the wound-type battery cell. Therefore, the thickness of the square multi-pole battery cell is also required to be larger and larger. However, as the thickness of the cell increases, the number of layers of the cell increases, and the change in the thickness of the pole piece / diaphragm, the tension fluctuation of the pole piece during the winding process, and the difference in die-cutting size are likely to cause extreme Misalignment of the ear leads to unqualified batteries and affects product quality. Contents of the invention [0003] Embodiments of the present invention provide a tab dislocation adjustment method and dev...

AI Technical Summary

Problems solved by technology

However, as the thickness of the battery cell increases, the number of layers of the battery cell increases, and the change in the thickness of the pole piece / diaphragm, the tension fluctuation of the pole piece during the winding process, and the difference in die-cutting size are likely to cause extreme damage during the winding process of the pole piece. There is a misalignment problem in the ears, which leads to unqualified batteries and affects product quality

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