A printing method for corrosion prevention, and a battery cell manufactured using this method.

A printed coating structure using thermosetting resin on the fractured surfaces of battery cans addresses rust prevention and energy density issues in cylindrical battery cells, ensuring efficient manufacturing and corrosion resistance.

JP2026519586APending Publication Date: 2026-06-16LG 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
2024-05-31
Publication Date
2026-06-16

AI Technical Summary

Technical Problem

Existing methods for preventing rust on the fractured surfaces of battery cans in cylindrical battery cells are inefficient, costly, and can interfere with subsequent processes, leading to potential cosmetic defects and reduced energy density.

Method used

A printed coating structure is applied to the minimum area of the fractured surface of the battery can using a thermosetting resin or sealant, which is printed without additional steps and does not interfere with welding, and is hardened through heat activation, enhancing corrosion resistance and energy density.

Benefits of technology

The coating effectively prevents rust on the exposed metal surfaces of the battery can while maintaining process efficiency and energy density, without adding manufacturing time or cost, and ensures the coating does not obstruct subsequent processes.

✦ Generated by Eureka AI based on patent content.

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Abstract

The present invention provides a method for printing a coating material to prevent corrosion, and a battery cell manufactured using the same. According to the method, a coating material can be locally printed to the minimum area where coating is required for rust prevention at the tip of the crimping portion of a battery can where a fracture surface exists. The coating material is a thermosetting resin or sealant and can be cured by the heat of the subsequent cell activation process without undergoing a separate curing process. The coating material may also be printed to the tip of the crimping portion by reverse-transferring (printing) a coating material with a predetermined pattern transferred to the surface of a flexible pad to the local area.
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