Welding device

CN115473014BActive Publication Date: 2026-05-26LG ENERGY SOLUTION LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
LG ENERGY SOLUTION LTD
Filing Date
2022-06-09
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

Existing welding methods are prone to damaging electrode assemblies or diaphragms, especially when welding the bottom surface of the battery can and electrode joints, where friction between the high-temperature welded part and the electrode assembly causes damage.

Method used

Design a welding device including a central rod and an outer cover. The outer cover can move in the radial direction to enlarge the winding central hole, preventing the high-temperature welding part from directly contacting the electrode assembly. The combined structure of the central rod and the outer cover reduces friction and heat transfer.

Benefits of technology

It effectively reduces damage to electrode assemblies and diaphragms, prevents direct contact between high-temperature welding parts and electrode assemblies, and lowers the risk of damage during the welding process.

✦ Generated by Eureka AI based on patent content.

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    Figure CN115473014B_ABST
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Abstract

The present invention provides a welding apparatus comprising a welding rod configured to be inserted into a winding center hole disposed at the winding center of an electrode assembly inserted into a battery can, for welding an electrode connector of the electrode assembly or an electrical connection component connected to the electrode connector to the bottom surface of the battery can, and the welding rod comprising: a center rod located at the center of the welding rod in a diametrical direction; and an outer cover configured to cover the outer periphery of the center rod and mounted to be movable in a first direction away from the center rod and in a second direction close to the center rod.
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