玻璃纤维气凝胶棉毡隔热性能测试表征及其应用

Test and characterization of thermal insulation properties of glass fiber aerogel cotton felt and its application

为模拟新能源动力电池在发生热失控、碰撞挤压、穿刺等情况产生的高温高压环境下,电芯之间SiO_(2)气凝胶棉毡材料隔热保温,阻燃效果。实验设计了一种检测气凝胶材料在高温高压环境下隔热性能的系统及方法,通过温度测量分析系统测量气凝胶材料热面和冷面温度,计算冷热面温度差,以此判断气凝胶材料的隔热性能。对玻璃纤维SiO_(2)气凝胶棉毡进行导热系数、压缩强度、热重分析等性能表征,结果表明,玻璃纤维SiO_(2)气凝胶棉毡的所测性能优于GB/T 34336—2017《纳米孔气凝胶复合绝热制品》的要求,可在新能源汽车领域使用。

In order to simulate the thermal insulation and flame retardant effect of SiO_(2)aerogel cotton felt materials between electric cores of new energy power batteries in the high-temperature and high-pressure environment caused by thermal runaway,collision extrusion,puncture,etc,this experiment designed a system and method to detect the thermal insulation performance of aerogel materials in the high-temperature and high-pressure environment.By measuring and recording the temperature of the hot and cold surfaces of aerogel materials through the temperature measurement and analysis system to calculate the temperature difference between the hot and cold surfaces of aerogel materials,the thermal insulation performance of aerogel materials is judged.At the same time,the glass fiber SiO_(2)aerogel cotton felt of the same batch was characterized by thermal conductivity,compressive strength,thermogravimetric analysis and other properties.The test results show that the measured performance of glass fiber SiO_(2)aerogel cotton felt is better than the requirements specified in standard GB/T 34336—2017"Reinforced Nanoporous Aerogel Products for Thermal Insulation",and can be used in the field of new energy vehicles.