A battery winding mechanism for tab detection

Abstract

The invention provides a battery winding mechanism for tab detection. The front end of the positive electrode cutter is connected with a positive electrode detection mechanism for detecting the folding of the positive electrode tab of the positive electrode sheet, and the positive electrode detection mechanism includes a positive electrode frame and a second pair of radiation sensors; the front end of the negative electrode cutter is connected with a negative electrode sheet for detecting The negative electrode detection mechanism of the folded negative electrode tab, the negative electrode detection mechanism includes a negative electrode frame and a first opposite-radiation sensor. Realize the detection of the flipping of the tabs, reducing the risk of missing tabs. In addition, three through-beam sensors are arranged in a triangular arrangement at the same time, so that the folding situation of each side of the tab can be accurately judged.

Description

technical field [0001] The invention relates to the technical field of lithium ion batteries, in particular to a battery winding mechanism for tab detection. Background technique [0002] Winding the battery is to wind the positive electrode sheet, negative electrode sheet, and separator of the battery into a battery cell through a winding machine. Use a testing instrument to detect whether the tabs on the positive and negative plates are folded, and only after the positive and negative plates are rolled into a core, rely on manual efforts to determine the folding of the tabs. Manual inspection will result in missed inspections, which will lead to the winding core with folded tabs flowing into the next process. During the short-circuit test after welding, the folded tabs will easily cause short-circuiting of the winding core; some tabs are folded at different angles. Seriously, it cannot be detected at the short-circuit test station, and it will flow into the market, causin...

AI Technical Summary

Problems solved by technology

[0002] The winding battery is to wind the positive electrode sheet, negative electrode sheet, and separator of the battery into a battery cell through a winding machine. At present, in the cell winding process, because the gap between the pre-roller and the winding needle of the winding machine is too small, it cannot Use testing equipment to detect whether the tabs on the positive and negative electrodes are turned over, and only after the positive and negative electrodes are rolled into a core, rely on manual to determine the folding of the tabs

Manual detection will result in missed inspections, resulting in the winding core with tabs turned into the next process. During the short-circuit test after welding, the tabs are easily turned over to cause a short circuit of the core; some tabs are bent at an incorrect angle. Seriously, it cannot be detected at the short-circuit test station, and will flow into the market, causing potential safety hazards

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