Design And Simulation Of The Standing And Conveying Line For Secondary Liquid Injection Of Lithium Battery

With the increase of chemical substances in high-performance power lithium batteries,more electrolyte is needed and the electrolyte is more difficult to be absorbed.The way of one-time liquid injection could no longer meet the technological requirements of high-performance power lithium battery production.Therefore,in order to improve the liquid injection quality,some lithium battery manufacturers are facing the problem of production line modification.As a simple and effective way to promote the absorption of electrolyte and improve the quality of liquid injection,the method of "liquid injection-standing-liquid injection" is one better choice for lithium battery manufacturers,and the technological process of multiple liquid injection is basically consistent.When the production line is reconstructed,the two primary liquid injection lines are connected from end to end.If the problem of lithium battery automatic buffer and standing in the intermediate process could be solved,that is to say,the primary liquid injection line could be modified into a multiple liquid injection production line.Compared with rebuilding a new liquid injection production line,it is more practical to reconstruct the production line on the original basis.Based on the site inspection of the primary liquid injection workshop in a lithium battery manufacturer,and with the available space between two primary liquid injection production lines in the original workshop,to solve the problem of lithium battery automatic buffering and static storage between the two primary liquid injection lines,a lithium battery secondary liquid injection standing and conveying line is designed based on the automated warehouse of the process oriented system in this article.By this way,the transformation from the primary liquid injection production line to the "liquid injection-standing-liquid injection" production line could be realized.First two feasible renovation plans are proposed and compared based on the relevant requirements of the enterprise and the inspection data of the workshop,and the better plan is selected as the overall design plan;Then,based on the overall plan,the main equipment are selected,designed,and layouted.and the core conveying equipment-stacker is analyzed and optimized;Next,a simulation system is built to verify whether the conveyor line could achieve automated connection between two primary liquid injection machines;Finally,a design scheme for the overall control system of the conveyor line is proposed.The main content includes:(1)Overall scheme design.After literature reviewing,site inspecting and process analyzing,two feasible schemes-conveyor line type and stereoscopic warehouse type,are proposed and compared.And the stereoscopic warehouse type is selected as the overall design scheme of the conveyor line finally.(2)Design and selection of equipment for each sub-component.Based on the characteristics of goods and technological process,the shelf and tray,sorting system,stacker and pin pulling mechanism are designed,and the structures of stacker are analyzed and checked according to relevant requirements.(3)Finite element analysis and structural optimization of stacker.The static analysis of the stacker is carried out with ANSYS software.The results show that the stress and strain of the frame structure and the fork structure are within the allowable range.The lightweight design of the frame structure is carried out by using the ANSYS Design Xplorer module,and the satisfactory results are obtained.(4)Construction of the conveying line simulation system.The model of conveying line is imported into the Plant Simulation software through relevant interfaces,the simulation system is built and the conveying line is simulated and analyzed through parameter setting and programming.The simulation results show that,under normal operation,the automatic connection between two primary liquid injection machines could be realized by the conveying line.(5)Design of general control system for the conveying line.The design of the total control system of the lithium battery secondary liquid injection stewing and conveying line is proposed,and the working process of the conveying line is analyzed.The design of the position and speed control scheme of the stacker,and the selection of hardware of the control system and the stacker motors are completed.