Ultrasonic seam welding equipment

The ultrasonic seam welding apparatus synchronizes the seam and pressure rollers with a unified drive, addressing the limitations of conventional methods by ensuring smooth welding and maintaining conductivity, while minimizing space and time, for electrode tab welding in new energy vehicles.

JP3256248UActive Publication Date: 2026-06-18PROLOGIUM TECHNOLOGY CO LTD
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Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Utility models
Current Assignee / Owner
PROLOGIUM TECHNOLOGY CO LTD
Filing Date
2026-04-20
Publication Date
2026-06-18

AI Technical Summary

Technical Problem

Conventional seam welding methods face limitations in welding electrode tabs wider than 50 mm, requiring multiple passes, increased space, and prolonged process time, with separate seam and pressure rollers causing wrinkling, deformation, and reduced electrical conductivity.

Method used

An ultrasonic seam welding apparatus that simultaneously drives and rotates a seam welding roller and pressure roller using a single power source, ensuring synchronized movement and smooth welding surfaces without deformation or breakage, reducing equipment space and process time.

Benefits of technology

Achieves smooth welding surfaces, maintains electrical conductivity, and reduces equipment space and process time by integrating the seam and pressure rollers with a unified drive, preventing wrinkling and breakage of electrode tabs.

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Abstract

This invention provides an ultrasonic seam welding apparatus used for welding electrode tabs and electrode leads of drive battery cells for electric vehicles. [Solution] The ultrasonic seam welding apparatus utilizes a seam welding method instead of a known flat welding head, overcoming the problem of excessively large welding surfaces that cannot be welded in a single pass. Furthermore, the seam welding roller 20 and pressure roller 30 are combined and driven by the same power source 40, reducing the area occupied by the equipment and the working time of the process. At the same time, the tangential speed at which the seam welding roller and pressure roller rotate is controlled to be the same as the speed at which the cells are transferred. As a result, the electrode tabs after welding do not wrinkle, deform, or break, maintaining the most desirable electrical conductivity state.
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