Fans play a crucial role in environmental regulation and safety assurance in the lithium battery new energy field, running through all core processes such as electrode preparation, cell assembly, and formation testing. In the electrode coating process, explosion-proof fans with solvent-resistant properties precisely control the drying rate of the electrode sheets through a precise air knife system. Their unique labyrinth seal structure effectively isolates NMP volatile gases, and in combination with the RTO waste gas treatment system, achieve an organic solvent recovery rate of over 95%. The cell assembly workshop uses special cleanroom fans to maintain a million-grade clean environment while maintaining a laminar flow speed of 0.5-1.0 m/s. The specially designed static elimination device can control the surface resistance within the range of 10^6 - 10^9 Ω, completely eliminating the damage caused by static electricity to the separator. The formation workshop is equipped with explosion-proof high-temperature fans, which operate stably in a 45°C aging test environment. Through multi-level combustion control, the concentration of DMC, EC and other ester gases emitted by the electrolyte is controlled below 20% of the explosion limit. The laser welding station integrates a local exhaust fan, whose nano-fiber filtration module has a dust capture efficiency of 99.97% for 0.3 μm metal dust, and the pulse reverse blowing system ensures a filter cartridge lifespan of over 8,000 hours. The intelligent lithium battery factory deploys an IoT fan cluster, interacting with the MES system data through the OPC-UA protocol, and regulating the dew point of the drying room to below -40°C, reducing energy consumption by 35% compared to traditional systems. To meet the requirements of solid-state battery research and development, the new magnetic suspension fan operates without oil lubrication in a pure oxygen environment, and its vibration value of less than 0.2 mm/s perfectly matches the micron-level precision requirements of the electrode pressing process. In the future, with the mass production of 4680 large cylindrical batteries, intelligent fans will deeply integrate digital twin technology, optimizing the uniformity of the airflow during electrode baking through multi-physics field simulation. The AI-driven predictive maintenance system can identify bearing wear risks 72 hours in advance, providing safer and more precise environmental control solutions for lithium battery manufacturing in the TWh era. The drying process of the proton exchange membrane in the hydrogen fuel cell field will also benefit from the cross-domain innovation of fan technology.