BYD Electric Bus Battery Compartment Fire Barrier: 30-Minute Flame Resistance with AG-F Aerogel Blanket

Since 2019, BYD has deployed our 5mm AG-F Aerogel Blanket as the primary fire barrier between battery compartments and passenger areas across its electric bus fleet in Shenzhen, Guangdong.The Safety ChallengeWhen a lithium battery cell enters thermal runaway, internal temperatures can exceed 800°C within seconds. The structural composite board separating the battery compartment from the passenger cabin must resist ignition long enough for full passenger evacuation. Standard insulation materials typically fail within 5–10 minutes under direct flame exposure.AG-F PerformanceOur 5mm AG-F Aerogel Blanket withstands lithium battery combustion flames for over 30 minutes without allowing ignition of the composite board above. This directly translates to extended safe evacuation time for passengers, meeting China's mandatory fire safety standards for new energy commercial vehicles.InstallationThe blanket features self-adhesive backing for direct attachment to the underside of the composite board, with additional mechanical fixation using code nails from the reverse side. This dual-fixing method ensures the insulation layer remains secure under vibration and thermal cycling conditions typical of commercial bus operation.Stable monthly procurement volumes reflect consistent adoption across BYD's bus production lines, demonstrating both technical reliability and supply chain scalability at commercial scale.