Electrode drying degree measuring device and electrode coating apparatus including the same

The electrode drying degree measuring device quantifies the drying of lithium-ion battery electrodes, addressing contamination issues by measuring brightness and transmitting defect signals, thus improving production quality and yield.

JP2026517497APending Publication Date: 2026-06-01LG ENERGY SOLUTION LTD
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Patent Information

Application Number
JP2025567738
Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
Priority Date
2024-04-08
Filing Date
2025-02-21
Publication Date
2026-06-01

AI Technical Summary

Technical Problem

Conventional methods lack a means to quantify the degree of drying of the active material layer on the top surface of electrodes in lithium-ion batteries, leading to contamination of rollers and reduced production yield due to improper drying, which affects cell performance.

Method used

An electrode drying degree measuring device positioned behind the top surface drying device measures the brightness of the active material layer to quantify drying, preventing contamination by transmitting defect signals when drying is inadequate or excessive.

Benefits of technology

The device enables precise measurement of drying levels, correlating process variables with drying outcomes, and promptly responds to improper drying to prevent roller contamination, enhancing production quality and yield.

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Abstract

Some embodiments of the electrode drying degree measuring device are configured to measure the degree of drying of the center and side portions of the active material layer dried by the top surface drying device, which is positioned behind the top surface drying device, with reference to the machine direction (MD) of the current collector, with reference to the machine direction of the current collector. Some embodiments of the present invention enable the quantification of the degree of drying of the active material layer of the top surface coated electrode and to derive a correlation between the process variables of the top surface coating device and the top surface drying device and the degree of drying of the active material layer of the top surface coated electrode. Some embodiments of the present invention enable a rapid response when the drying of the active material layer of the top surface coated electrode is not properly performed and can prevent contamination of rollers located in front of the top surface drying device with reference to the machine direction of the current collector and / or rollers facing the back surface coating device.
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