Battery winding mechanism for tab detection

Abstract

The invention provides a battery winding mechanism for tab detection, which comprises a winding needle for winding a positive plate and a negative plate into a wound battery, and a positive cutter and a negative cutter used for cutting the positive plate and the negative plate, wherein the front end of the positive cutter is connected with a positive detection mechanism for detecting the turnover of a positive tab of the positive plate; the positive electrode detection mechanism comprises a positive electrode frame and a second correlation sensor; and the front end of the negative electrode cutter is connected with a negative electrode detection mechanism for detecting the turnover of a negative electrode lug of the negative electrode piece; and the negative electrode detection mechanism comprises a negative electrode frame and a first correlation sensor. The turnover condition of the tab is detected, and the missing detection risk of the tab is reduced; and the three correlation sensors are arranged in a triangular shape at the same time, so that the turnover condition 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] 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. Only after the positive and negative electrodes are rolled into a core, can the tabs be judged manually. 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...

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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