Adoption of Heat Insulation Materials for Lithium‐Ion Battery Fire Blanket Coating and Earlier Fire Alarming

ABSTRACT

This article presents a comprehensive study of the insulation materials used for lithium‐ion battery fire blanket coatings. First, a novel testing method is introduced to quantify the impact of insulating agents on the softness and wraparound capabilities of the blanket. Second, to guarantee the explosion resistance as well as other functions of the blanket, insulation materials are introduced, and the insulation effectiveness of various insulating agents is assessed using a 1200°C flame, with findings indicating that a 10% addition of 20 nm silica aerogel yields the best insulation effect. Further analysis of the influence of insulating agents on the release of pyrolysis particles and smoke reveals that both concentrations are elevated compared to the bare silicon dioxide cloth, thereby enabling fire detectors to trigger alarms at the earliest possible stage. Finally, low‐temperature tests are conducted to verify the enhanced insulation properties of the coating in non‐fire scenarios. The outcomes confirm that a 10% addition of 20 nm silica aerogel provides the best insulation. The research results demonstrate that this innovative coating exhibits outstanding insulation performance across a broad temperature range and offers significant fire detection and protection functionalities.