Abstract: Lithium-ion battery thermal runaway poses a significant threat to the safety of civil aviation transportation. In order to improve the accuracy and reduce the detection time of lithium-ion battery thermal runaway, this paper presents the design of a bionic electronic nose gas chamber specifically tailored for detecting thermal runaway gases from lithium-ion batteries. The study first analyzes the structure and flow field distribution within the canine nasal cavity, and then mimics its key characteristics. Using orthogonal experiments, the structure and dimensions of the bionic gas chamber are optimized. Finally, the effectiveness of the proposed bionic gas chamber is verified through simulation software. The results indicate that the gas chamber facilitates a quicker and more uniform flow of gases to the sensor array, ensuring full contact. Compared to the entire area inside the bionic gas chamber, the mass fraction of gases in the region of the sensor array is enhanced by 44.93%. Furthermore, when compared to a conventional square gas chamber, the gas mass fraction in the sensor array region of the bionic gas chamber is increased by 10.01%.

Key words: lithium-ion battery thermal runaway, electronic nose, bionic design, air chamber, simulation