In December 2025, as the global new energy vehicle market continues to expand, ethyl silicone oil, with its unique physical and chemical properties, will achieve key technological breakthroughs in battery thermal management and motor lubrication, becoming an important material to promote industry development.


High temperature insulation performance improves battery safety
Ethyl silicone oil is widely used as a thermal conductive medium in the thermal management system of new energy vehicle battery packs. Its excellent high temperature resistance (working temperature range of -70 ℃ to 150 ℃) and insulation performance can effectively prevent the risk of short circuit caused by overheating of the battery. For example, a leading battery company increased heat dissipation efficiency by 30% and extended battery cycle life by 15% by filling low viscosity ethyl silicone oil in the gaps between battery modules. In addition, the inertness of ethyl silicone oil makes it highly compatible with electrolytes, avoiding the chemical corrosion problems that traditional thermal conductive materials may cause.


Optimization of lubrication performance and motor efficiency
In the motor drive system, ethyl silicone oil serves as the lubricating grease base oil, significantly reducing the friction loss between the rotor and stator. Experimental data shows that the use of ethyl silicone oil based grease in motors reduces energy consumption by 8% and reduces operating noise by 5 decibels. A new energy vehicle manufacturer revealed that its latest motor has achieved -40 ℃ low-temperature starting performance by optimizing the formula of ethyl silicone oil, solving the problem of cold starting in winter in northern regions.


Market size and industrial chain synergy
According to data from Dongfang Wealth Network, the global market size of ethyl silicone oil is expected to exceed 4 billion US dollars by 2025, with the new energy vehicle sector accounting for 25%. Domestic enterprises such as Xinyuan Chemical and Yunnan Nengtou Silicon Materials are accelerating their layout of high-end product lines: Xinyuan Chemical's research and development of ultra-low temperature resistant ethyl silicone oil has passed rigorous testing by automotive companies, and Yunnan Nengtou's low ring vinyl silicone oil (key raw material for ethyl silicone oil) has an annual production capacity of 5000 tons, providing stable supply for downstream.


Industry experts point out that with the popularization of 800V high-voltage platforms and solid-state battery technology, ethyl silicone oil needs to further optimize its dielectric constant and thermal stability to meet higher standards of insulation and heat dissipation requirements. In the next three years, enterprises with the ability to integrate the entire industry chain will have an advantage in competition.