Method for coating slurry of lithium ion battery separator
By preparing the slurry through instant stirring and using flat rollers, the problem of uneven thickness of the lithium-ion battery separator coating is solved, and the uniformity of the coating and the performance of the separator are improved.
CN119076305BActive Publication Date: 2025-04-18JIANGSU CHITAI NEW MATERIAL CO LTD
Patent Information
- Application Number
- CN202411198954.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-29
- Publication Date
- 2025-04-18
- Estimated Expiration
- 2044-08-29
AI Technical Summary
Technical Problem
In the existing lithium-ion battery separator coating process, uneven slurry supply leads to uneven coating thickness, affecting the performance of the separator.
Method used
The slurry prepared by instant stirring is coated, and the slurry on the surface of the diaphragm base film is flattened through a flattening roller to ensure uniform slurry distribution and consistency of coating thickness.
Benefits of technology
It improves the uniformity and effect of the coating, reduces the probability of uneven coating thickness, and ensures improvement of the membrane performance.
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Smart Images
Figure CN119076305B_ABST
Abstract
The present invention relates to the technical field of lithium-ion battery processing, and more specifically, to a method for coating a lithium-ion battery diaphragm with slurry, the method comprising the following steps: taking a plurality of raw materials for preparing the slurry and placing them in a mixer for stirring and mixing; taking a diaphragm base film and placing it on a coating device; applying the slurry formed by stirring and mixing to the surface of the diaphragm base film through the coating device; leveling the slurry on the surface of the diaphragm base film by a leveling roller, and scraping off the excess slurry; after the slurry coating is completed, drying and curing the slurry on the surface of the diaphragm base film, and obtaining a lithium-ion battery diaphragm coated with slurry after drying and curing. After the slurry is coated on the surface of the diaphragm base film, the present invention leveled the slurry on the surface of the diaphragm base film by a leveling roller, which can reduce the probability of uneven thickness of the coating due to increased slurry supply, improve the uniformity of the coating, and improve the effect of the coating.
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Citation Information
Patent Citations
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