Design and Optimization for a New Locomotive Power Battery Box

To solve the disadvantages of low protection grade, high weight, and cost existing locomotive power battery system, this study optimizes scheme introduces design concept two-stage protection. The purpose research is to improve level pack IP68, optimize sheet metal box structure into a more lightweight frame structure, simplify cooling mode for natural air cooling, maintain heat exchange capability. In course study, with function proposed. numerical model analyzes self-load, transverse load, longitudinal mode, fatigue, layout tank cell. optimized was physically tested economically compared. results show that: (1) maximum load stress 128.4 MPa, which lower than 235 ultimate material, fatigue factor 3.75, higher 1.0, it not prone damage. (2) Under low-temperature heating condition, overall temperature rise 4.3 °C, greater 2.3 °C under conditioning dissipation scheme. high-temperature charging 2.0 value same as discharge 3.0 2.1 At time, three working conditions less 15 stipulated in JS175-201805 standard. simulation that airflow can provide good environment work. (3) prototype effectively structural integrity cell extreme test cases, reducing probability fire caused by deformation. (4) adopts level, simultaneously achieve prevent thermal runaway, while costs. new system. (5) weight 2020 kg, original 2470 kg; thus, reduction 450 kg. Meanwhile, volume 1.49 m3, 1.93 m3; 0.44 m3.