Automatic laser hole sealing machine for liquid injection hole of lithium battery

By using a modular and automated laser automatic sealing machine for lithium battery injection holes, which employs progressive segmented welding and a high-precision triaxial module, the problem of unstable welding quality of sealing nails after lithium battery injection has been solved. This has enabled efficient and stable welding and quality control, thereby improving the safety and reliability of lithium batteries.

CN224417792UActive Publication Date: 2026-06-26XIAMEN XIAZHICHUANG TECHNOLOGY CO LTD
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Patent Information

Application Number
CN202521607949.8
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-07-30
Publication Date
2026-06-26
Estimated Expiration
2035-07-30

AI Technical Summary

Technical Problem

After lithium battery is filled with electrolyte, the electrolyte around the sealing nail is prone to vaporization at the moment of welding, forming high-pressure gas, which can lead to defects such as splashing, bursting points and micro-pinholes, affecting the safety and reliability of the battery.

Method used

The modular and automated laser automatic sealing machine for lithium battery injection holes, through pre-welding, full welding and appearance inspection mechanisms, combined with a high-precision three-axis module and industrial vision system, realizes progressive segmented welding and full-process automation, and integrates stable support, dynamic correction and flexible limit functions.

Benefits of technology

It improves the stability and sealing of welding quality, enhances production efficiency and product consistency, significantly increases capacity and yield, and forms a closed-loop quality control system, representing the technological advancement in the lithium battery manufacturing field.

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Abstract

The utility model belongs to the technical field of lithium battery liquid injection hole sealing, and particularly relates to a lithium battery liquid injection hole laser automatic hole sealing machine which comprises three welding unit bottom plates, the three welding unit bottom plates are linearly arranged and distributed in parallel, and universal wheels are further installed at the bottoms of the welding unit bottom plates. And conveying mechanisms are arranged in the centers of the tops of the bottom plates of the three welding units. According to the automatic laser hole sealing machine for the liquid injection hole of the lithium battery, an efficient, stable and intelligent complete production solution is constructed through modular and automatic precise design. The method has the core advantages that firstly, the whole production line adopts a progressive sectional welding strategy of pre-welding, full welding and detection, so that the thermal stress is effectively controlled, and the stability and the sealing property of the welding quality are ensured;
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