Method for positioning electrode tabs

By alternately setting active material areas and empty foil areas on the electrode plates and using detection sensors to identify their length and width, the positioning problem of multi-tab electrode plates is solved, thereby improving the battery's lifespan and safety.

CN119726006BActive Publication Date: 2026-06-05EVE ENERGY CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
EVE ENERGY CO LTD
Filing Date
2024-12-19
Publication Date
2026-06-05

AI Technical Summary

Technical Problem

Existing technologies cannot accurately position, weld, and apply adhesive to the multiple tabs in the electrode sheet, which limits battery performance and fails to meet the needs of rapid battery development.

Method used

By alternately setting multiple active material areas and empty foil areas on the electrode sheet, and using detection sensors to identify active material areas and empty foil areas of different lengths and widths, different detection strategies are adopted to accurately locate the electrode tab welding or adhesive application position, including detecting the width of the empty foil area or the length of the active material area to determine the welding or adhesive application position.

Benefits of technology

This technology enables precise positioning of the multi-tab electrode plates, improving battery lifespan and safety, and enhancing overall battery performance.

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    Figure CN119726006B_ABST
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Abstract

This application discloses a method for positioning multiple tabs on an electrode sheet, belonging to the field of battery technology. The method includes: along the direction from the starting end to the ending end of the electrode sheet winding, alternatingly arranging multiple active material regions and multiple empty foil regions on the electrode sheet; the length of the active material regions along the alternating arrangement direction is L. n The width of the empty foil area along the alternating setting direction is D. n The empty foil area is used for electrode tab welding or adhesive application; at least two L... n Different, and at least two Ds n The same or at least two Ds n Different; Positioning Method 1: When at least two D n At the same time, detect each D n When D is detected n When the preset width I is used, the empty foil area is positioned as the electrode tab welding position or the adhesive application position; Method 2: When at least two D n When they are the same, detect each L. n and its adjacent D n When L is detected n When the preset length II is used, and the adjacent D n When the value is greater than 0, the empty foil area is positioned as the electrode tab welding or adhesive application location. The method of this application can accurately locate the welding position of multiple electrodes.
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