Dec 06, 2025
How We Stopped an EV Battery Pack from Cooking Itself – A Real Hebei Lab Story
Last December, minus 12 °C outside our Langfang facility, but inside the test chamber it felt like a sauna. A major Shenzhen NEV maker shipped us a 800V pack and said: “Make it survive a full thermal runaway simulation.” Without proper insulation, the temperature spiked 42 °C in under 4 minutes – enough to trigger the safety vent and ruin the whole module.
We mixed 12 % of our hydrophobic silica aerogel powder (average 15 μm) into their composite separator layer. Result? Peak temperature rise dropped to just 5.2 °C. The propagation test that used to fail in 38 seconds now ran past 3 minutes with zero flame spread. Their chief engineer stared at the thermal camera and muttered, “This is witchcraft.”
It’s not witchcraft. It’s 99 % porosity, 0.013 W/m·K conductivity, and true Class A1 fire rating that works up to 800 °C. Thickness added? Only 6 mm. Weight penalty? Less than 180 g per kWh. That directly translates into 30–50 km extra range on a typical 80 kWh pack.
In 2024 alone we supplied customized aerogel blends to 18 Tier-1 and Tier-2 battery projects across China and Southeast Asia. Every single batch passed nail penetration and overcharge tests first time.
If you’re designing the next 4680, blade, or solid-state pack and heat is keeping you up at night – let’s talk. Drop your spec to cn-aerogel.com or WhatsApp +86 139 3392 9092 and I’ll send a free 100 g sample plus full test report within 48 hours.
2025 is coming fast. Don’t let thermal runaway be the reason your project gets delayed.
Product Display
Hebei Woqin is a leading Silica Aerogel Blanket Manufacturer with 12 years of export experience. We provide ultra-thin, flexible insulation with a certified thermal conductivity of 0.02 W/m.K. Our hydrophobic blankets withstand up to 650°C and effectively prevent Corrosion Under Insulation (CUI) in demanding industrial environments.
Hebei Woqin offers high-quality silica aerogel particles with superior hydrophobicity. These 1-5mm particles feature a high surface area and extreme thermal resistance, making them the ideal functional filler for advanced insulation materials and industrial additives.
Hebei Woqin’s silica aerogel powder is a high-purity, ultra-fine functional filler (15-50μm). With excellent hydrophobicity and low density, it is specifically designed to enhance the thermal performance of coatings, plastics, and composite industrial materials.
Aerogel Thermal Insulation Coating
Hebei Woqin offers Aerogel Coating with 0.032 W/m.K thermal conductivity. Ideal for seamless application on complex valves and flanges, it ensures superior anti-scalding protection and personnel safety. This durable solution effectively prevents Corrosion Under Insulation (CUI) in harsh industrial environments.
Hebei Woqin is a premier VIP manufacturer with a certified 0.002 W/m.K thermal conductivity. Our Vacuum Insulation Panels offer 10x the performance of traditional materials in an ultra-thin profile. Ideal for cold chain logistics, medical freezers, and high-end construction where space-saving and thermal efficiency are critical.
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In terms of business scope, it covers general items: sales of aerogel products, building materials, building decoration materials.
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