关键词: 辊压机, 锂电池极片, 有限元分析, 优化设计

Abstract:

In the process of rolling electrodes, due to the contradiction between the energy density and the material mechanical properties of coatings on the electrode, the roller pressure should be controlled strictly according to the compression ratio. Actually, the roller surface made the gap between two rollers difficult to measure through experiments. Consequently, it was difficult to  directly quantify the relation between the gap size and roller pressure by using physical prototype. The variations of physical quantities during the electrodes manufacturing process were simplified to build the digital model of rolling mill and electrode deformation. With the help of the digital model, the relation of gap variation and pressure was quantitatively simulated. According to the above study, on the purpose of simulation-driven design, the structural parameters and work condition of digital rolling mill were optimized by the response surface methodology and multi-objective genetic optimization algorithm. The stiffness test has validated the digital model and the simplification hypothesis. These results are important to lay a plan for rolling processes; meanwhile the research and development efficiency is improved by the response surface-based design optimization.

Key words: rolling mill, lithium-ion battery electrode, finite element analysis, optimization design