Aerogel Insulation Sheet (AG50)

AG50 is an ultra-thin aerogel insulation pad developed for fire protection and thermal insulation between battery cells. It uses fiberglass wet-laid surface felt (model AG50-G) or ceramic fiber paper (model AG50-C) as the base, processed via sol-gel, dip-coating, or impregnation, followed by supercritical extraction. Minimum thickness is 0.8 mm (AG50-G) or 1 mm (AG50-C), with precise thickness control at ±0.2 mm tolerance, and the sheet can be supplied in roll or sheet form. Thermal conductivity at room temperature is 0.019-0.023 W/(m·K), achieving equivalent insulation at about one-fourth the thickness of traditional materials.

AG50-G uses fiberglass wet-laid surface felt: translucent appearance, 0.8 mm minimum thickness, 1500 mm maximum width, density 180 kg/m³, maximum continuous operating temperature 500°C, and instantaneous fire resistance to 900°C; it is listed as suitable for lithium iron phosphate (LFP) batteries. AG50-C uses ceramic fiber paper: white appearance, 1 mm minimum thickness, 1200 mm maximum width, density 230 kg/m³, continuous operation to 900°C, and instantaneous fire resistance to 1100°C; it is listed for ternary lithium batteries. Both share 99% water repellency, 0.00% chloride ion content, and 0.019-0.023 W/(m·K) conductivity.

The manufacturer’s comparison explains that between-cell space is extremely limited, so materials must combine ultra-low conductivity with structural integrity. Aerogel or microporous insulation needs only one-third to one-fourth the thickness of ceramic or fiberglass materials for the same insulation. But aerogel sheet uses fiberglass felt or ceramic fiber paper as a base, giving better structural strength than microporous boards, which lack inherent support: in high-frequency vibration environments like power batteries and energy storage systems, a damaged package lets a microporous board lose integrity and compromise fire protection. In most cases, ultra-thin aerogel sheet is the superior choice.

AG50 features tensile strength up to 100 kPa and compressive strength up to 500 kPa, remaining intact even in high-frequency vibration environments – a key requirement for battery packs in vehicles and energy storage systems. The fiber-based substrate gives the sheet structural integrity that unreinforced insulation materials lack, helping it survive cell swelling pressure, pack assembly forces, and long-term vibration without crumbling. Water repellency is 99% and chloride ion content is 0.00%, supporting long service in pack environments. These are published typical values; confirm lot-specific figures in the current TDS for use in structural or safety calculations.

AG50 is supplied in roll or sheet form, with thickness from 0.8 mm (AG50-G) or 1 mm (AG50-C) upward and customization available; maximum width is 1500 mm (G) or 1200 mm (C), also customizable. Thickness tolerance of ±0.2 mm supports consistent pack assembly. Buyers can provide cell dimensions and pack layout so the factory can propose sheet sizes or die-cut formats matched to prismatic, pouch, or cylindrical designs, and can select AG50-G or AG50-C based on battery chemistry – LFP versus ternary per the published table. Samples for pack-level fire and compression testing can be arranged during development.