Electrode tab assembly inspection device and inspection method using the same

The electrode tab assembly inspection device ensures reliable and consistent fracture of welds by applying a non-parallel tensile force, improving the reliability and quality of secondary battery manufacturing through accurate weld strength measurement.

JP2026521366APending Publication Date: 2026-06-30LG ENERGY SOLUTION LTD
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Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
LG ENERGY SOLUTION LTD
Filing Date
2024-12-05
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

Existing electrode tab assembly inspection methods lack reliability in ensuring that the electrode tab breaks at the weld points before the electrode tab assembly fails, leading to inconsistent quality in secondary battery manufacturing.

Method used

An electrode tab assembly inspection device that applies a tensile force diagonally or perpendicularly to the electrode, using synchronized fixtures to ensure consistent fracture of welds, allowing for accurate measurement of weld strength and fracture energy.

Benefits of technology

The device prevents premature breakage of the electrode tab, enhancing the reliability of the inspection process and enabling precise comparison of weld strengths, thereby improving the quality and consistency of secondary battery production.

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Abstract

According to an exemplary embodiment, an electrode tab assembly inspection device is provided. The electrode tab assembly inspection device includes a first fixture configured to fix an electrode including a coated portion and an uncoated portion; a second fixture configured to pull an electrode tab welded to the uncoated portion of the electrode in a direction not parallel to the electrode; and a gauge configured to sense the tensile force applied to the electrode tab.
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