A dynamic positioning compensation device and method for electrode tab position of cell winding cutting

By using a visual unit and an MLP neural network algorithm to detect the position of lithium battery tabs in real time, the problem of lag in tab detection and compensation in existing technologies is solved, the accuracy of tab positioning and cutting position is improved, and the risk of short circuit and abnormal internal resistance is reduced.

CN122393430APending Publication Date: 2026-07-14DOCTORS (TIANJIN) NEW ENERGY TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
DOCTORS (TIANJIN) NEW ENERGY TECH CO LTD
Filing Date
2026-05-09
Publication Date
2026-07-14

AI Technical Summary

Technical Problem

In the existing technology, the method for detecting and compensating the position of lithium battery tabs has a lag and cannot correct the cutting position in real time, resulting in large tab alignment errors, which may lead to abnormal internal resistance or short circuit risks.

Method used

A dynamic positioning compensation device and method are adopted. The position and thickness of the electrode are detected in real time by a vision unit. The MLP neural network algorithm is combined to perform real-time data fusion calculation, adjust the cutting position, and build a closed-loop compensation system to reduce the positioning error of the electrode.

Benefits of technology

It achieves improved electrode positioning accuracy to ±0.02mm, cut position error controlled within ±0.05mm, reduces the risk of short circuit and abnormal internal resistance, adapts to the processing needs of electrode tabs of different sizes, and shortens changeover time.

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Abstract

This application relates to the field of battery manufacturing technology, and in particular to a dynamic positioning compensation device and method for the position of electrode tabs in battery cell winding and cutting. The device includes a winding machine, which comprises a feeding mechanism, a tension stabilizing mechanism, a cutting mechanism, and a turret mechanism. These mechanisms are sequentially arranged along the moving direction of the electrode sheet. The winding machine is equipped with a guide assembly, a length measuring assembly, a drive assembly, a thickness measuring assembly, and a controller. A first vision unit, a second vision unit, and a third vision unit are installed on the winding machine. The first vision unit is located near the guide assembly, while the second and third vision units are both located near the turret mechanism. The controller is electrically connected to the winding machine, the guide assembly, the length measuring assembly, the first vision unit, the second vision unit, the third vision unit, and the thickness measuring assembly. This method improves the positioning accuracy of the electrode tabs and the precision of the electrode tab cutting position.
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