Composite Aluminum Foil (APF)

Composite aluminum foil is manufactured using an advanced vacuum deposition process, which innovatively constructs a unique "metal-polymer-metal" sandwich structure. Compared to traditional aluminum foil, this material effectively suppresses thermal runaway during nail penetration tests and rapidly interrupts current flow during short circuits. Its polymer substrate grants the material higher mechanical strength and dimensional stability, providing a critical foundational material solution for enhancing the safety performance of power batteries.