Coating device, method for manufacturing a separator using the same, and separator for lithium secondary battery manufactured thereby
KR102993397B1Active Publication Date: 2026-07-21LG ENERGY SOLUTION LTD
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Patent Information
- Authority / Receiving Office
- KR · KR
- Patent Type
- Patents
- Current Assignee / Owner
- LG ENERGY SOLUTION LTD
- Filing Date
- 2025-06-26
- Publication Date
- 2026-07-21
AI Technical Summary
Technical Problem
Existing methods for manufacturing separators in lithium secondary batteries face issues with solvent volatilization, increased viscosity, and aggregation of solutes in coating solutions, leading to degraded quality and difficulty in recycling unused coating solution.
Method used
A coating apparatus equipped with an ultrasonic generator and recovery unit to control particle size and viscosity, deaggregate inorganic particles and binder, and recycle unused coating solution, ensuring consistent quality.
Benefits of technology
The apparatus maintains constant particle size and viscosity of the coating solution, producing separators with excellent surface roughness and uniformity, enhancing mechanical and thermal stability while recycling unused solution.
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Smart Images
Figure 112025072024916-PAT00001_ABST
Abstract
The present invention provides a coating device comprising: a coater head; a receiving chamber located inside the coater head and receiving a coating liquid; an ultrasonic generator located inside the coater head and applying ultrasonic waves to the coating liquid received in the receiving chamber; and a coating bar that transfers the coating liquid from the receiving chamber onto at least one surface of a substrate being transported in one direction.
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