Although their packaging efficiency is higher, pouch cells have the lowest mechanical resistance, greater vulnerability for penetration, and a higher tendency for swelling compared to other cell formats. EV batteries may be fire hazards because they use electrolytes that are volatile and highly flammable in high temperatures.
EV batteries generate heat when they are in use, and if that heat isn’t managed properly, it can cause thermal runaway, a dangerous chain reaction that can lead to fires. Because battery electrolytes are flammable, preventing leaks and managing heat is essential to ensure they do not cause fires.
How Do Advanced CCS Designs Enable Fast Gas Release?
Advanced CCS designs support fast gas release by utilizing pre-cut materials featuring optional gas vent cutouts. ENNOVI-CellConnect-Pouch utilizes ENNOVI’s proven lamination technology, which ensures structural integrity and durability. Low-voltage signals are added on one side of the lamination, thereby reducing material used and resulting in a thinner solution.
Moving away from conventional CCS designs that use bulky plastic trays, ENNOVI-CellConnect-Pouch utilizes advanced lamination technology to create thin and lightweight solutions that enhance electrical and thermal performance at a lower manufacturing cost.
What Role Does Material Stability Play During a Thermal Event?
During a thermal event, using engineered dielectric layers like Polyimide (PI) and PEN provides superior temperature stability. PI, for instance, has excellent flexibility, tensile strength, thermal conductivity, and chemical resistance. These materials ensure the CCS remains stable under high temperatures, offering a continuous use temperature of up to <220°C and maintaining good electrical insulation properties to prevent melting or insulation loss. This helps maintain consistent performance across high-voltage platforms ranging from 12 to 800V and higher, ensuring that safety is not compromised by extreme thermal stress.
Can Advanced Lamination Prevent Electrolyte Leaks?
Yes, battery lamination involves adding layers of polymer films, adhesives, and separators around battery components that act like a shield to block external damage and prevent leaks. Battery electrolytes are flammable, and if they leak, they can cause fires, but lamination creates a tight seal which keeps these substances contained.
In addition, driving over rough roads puts physical stress on an EV’s battery, but laminated layers act like a “seatbelt” for battery cells, keeping internal components securely in place even during sudden jolts.
Engineering Safety: Advanced CCS Solutions for Pouch Cell Outgassing
Integrating pre-cut materials with optional gas vent cutouts into your cell architecture ensures rapid pressure relief and thermal stability.
Contact our engineering team today so we can understand your application and explore how our advanced lamination technology secures your pouch cell modules.