Secondary battery pouch film and pouch-type secondary battery including the same
By forming a textured structure on the surface of the sealant layer and adjusting the contact angle of the electrolyte, the problem of reduced sealing force caused by electrolyte residue is solved, thereby improving the sealing strength and service life of pouch-type secondary batteries.
CN122267390APending Publication Date: 2026-06-23YOUL CHON CHEMICAL CO LTD
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- YOUL CHON CHEMICAL CO LTD
- Filing Date
- 2025-10-27
- Publication Date
- 2026-06-23
AI Technical Summary
Technical Problem
In existing pouch-type secondary batteries, electrolyte residue in the sealant layer may reduce sealing force and affect service life.
Method used
A textured structure is formed on the surface of the sealant layer, and the contact angle of the electrolyte is adjusted from 37 degrees to 125 degrees. The textured structure is formed by plasma treatment or corona treatment, which improves the sealing strength of the sealant layer and the impregnation efficiency of the electrolyte.
Benefits of technology
By adjusting the contact angle of the sealant layer, electrolyte residue is reduced, the sealing force of the sealing part is improved, and the service life of the secondary battery is extended.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure CN122267390A_ABST
Abstract
A secondary battery pouch film of one embodiment of the present application is composed of a laminate in which at least a metal layer and a sealant layer are stacked in this order, and a concave-convex portion is formed on the surface of the sealant layer. The contact angle between the surface of the sealant layer and electrolyte solution is 37 degrees to 125 degrees. The secondary battery pouch film of the present application and the pouch-type secondary battery including the same have a concave-convex portion on the surface of the sealant layer. Thus, the sealing force of the seal portion can be improved by adjusting the contact angle with electrolyte solution, which is advantageous for prolonging the service life.
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