冷却液升级换代警示“跷跷板”现象

Core Insights - A recent recall of a batch of electric vehicle cooling liquids due to insufficient corrosion resistance has raised industry concerns about safety and performance standards [2][6] - The cooling liquid, previously a secondary component in the automotive supply chain, is now critical for managing the thermal performance of electric vehicle systems, including batteries and electric motors [2][3] Industry Overview - In 2024, China's automotive cooling liquid sales are projected to reach 1.8793 million tons, reflecting an 8% year-on-year growth, driven by the increasing penetration of electric vehicles and environmental policies [2] - The cooling liquid industry is experiencing a transformation, with a shift towards more environmentally friendly formulations, including bio-based coolants and low-toxicity options [4][5] Technical Developments - The evolution of cooling liquids has seen significant advancements since the introduction of ethylene glycol-based coolants in 1927, with ongoing research focusing on non-toxic and biodegradable formulations [4] - New additive technologies are enhancing the thermal conductivity and corrosion resistance of cooling liquids, which is essential for high-power density automotive systems [5] Regulatory Changes - The implementation of the national standard for electric vehicle cooling liquids (GB 29743.2-2025) on October 1, 2023, emphasizes the need for compliance with stricter performance criteria, including low electrical conductivity [7][8] Challenges and Recommendations - The recall incident highlights the need for a holistic approach to system integration in electric vehicles, ensuring that advancements in one subsystem do not adversely affect others [9][10] - Industry experts suggest the establishment of an open database to track risks and promote transparency across the supply chain, which could help mitigate similar issues in the future [10]