On October 15, 2024, Shanghai - Against the backdrop of accelerating breakthroughs in high range and fast charging technologies in the global new energy vehicle industry, ethyl silicone oil is becoming the core material of power battery thermal management systems due to its excellent temperature resistance and insulation performance. Recently, Jiangsu Xin'an Chemical, a leading domestic organic silicon enterprise, announced that its independently developed "high-temperature resistant ethyl silicone oil composite material" has successfully passed the rigorous testing of CATL and has been applied in batches to the new generation of Kirin battery cooling modules, marking a key technological breakthrough in China's high-end silicon-based materials field.


Technological breakthrough: solving the heat dissipation problem under extreme working conditions
During fast charging or high load operation, the local temperature of new energy vehicle batteries can instantly exceed 120 ℃, and traditional thermal conductive materials are prone to thermal attenuation and even carbonization risks. The ethyl silicone oil developed by Xin'an Chemical has been modified through molecular structure, raising its temperature resistance limit to 180 ℃ and increasing its thermal conductivity to 1.2W/m · K, which is 30% higher than conventional products. More importantly, the material maintains fluidity even in low temperature environments of -50 ℃, making it perfectly suitable for use in extremely cold northern regions.


Industrial Chain Collaboration: From Laboratory to Large Scale Mass Production
The project leader revealed that the R&D team spent 3 years overcoming the uniform dispersion technology of ethyl silicone oil and nano alumina, and solved the compatibility problem through microcapsule encapsulation technology, ultimately achieving a material lifespan of over 10 years. At present, Xin'an Chemical has built an intelligent production line with an annual output of 5000 tons. The products are not only supplied to top domestic battery manufacturers, but also exported to the European market and applied to BMW i series and Mercedes Benz EQ models.


Market outlook: The trillion dollar track will give rise to new growth poles
According to industry institutions' predictions, the global market size for thermal management of new energy vehicles is expected to reach 120 billion yuan by 2025, with the proportion of silicon-based thermal conductive materials expected to increase from the current 15% to 30%. Experts point out that ethyl silicone oil, as a new generation of thermal interface material (TIM), will gradually replace traditional silicone grease with its low volatility and aging resistance, becoming the preferred solution for high-end scenarios such as power batteries and 5G base stations.