The Ultra-thin Rectangular Battery Shell Forming Process Of Numerical Simulation And Experimental Research

Rectangular shell parts are widely used in industry and our daily lives, especially used as the cover of Li-ion battery, which is a main component of portable intelligence terminal products. With the development of these mobile communication products to be much lighter and thinner, it makes demands on the formation technology and method of Li-ion battery cover.In this paper, two kinds of Li-ion battery cover formation methods are simulated and the optimized parameters are given out. Under the direction of the simulation results, the dies are designed and the technology experiments are done.The depth-width ratio of the backward extrusion male die, which is an important parameter of rectangular shell parts backward extrusion, is studied in the beginning part of the paper. The critical value is gotten through the two-dimensional simulation results, which reflects the impact of the male dies' depth-width ratio on the wall thickness. Combination with the design experience, the critical value depth-width ratio in the backward extrusion formation of rectangular shell parts is concluded.In the second part of the paper, the technology parameters of backward extrusion parts are optimized. Adopting numerical simulation and orthogonal tests, the optimization efficiency is improved greatly and the simulation blindness dropped down. The continuous simulation of backward extrusion and ironing is first given out in this paper, which predicts the whole technology procedure visually.Based on the optimized parameters, the backward extrusion and ironing formation technology experiment of shell parts is done. The die design gist and experience are concluded, which uses the patent of our research group.In the end of the paper, the formation technology design and simulation of drawing and ironing are given out. The dies are designed and checked out.Generally speaking, following the way of modeling, numerical simulation, technology optimization and experiments, the paper studies the formation technology of battery cover parts systematically and experiments are done to test the reliability of this technology. Connecting closely with reality is a noticeable character of this paper.